Disclosure of Invention
On the basis of the prior art, it is an object of the present invention to provide a refrigeration appliance, in particular a refrigerated shelving unit of the type mentioned above, with improved performance.
This object is achieved by a refrigerated shelving unit as defined in the claims.
An advantageous embodiment of the refrigeration shelving unit in accordance with the invention is characterized in that said condenser is arranged at least partially within an upper region of the refrigeration shelving unit and the compressor is arranged within a lower region of the refrigeration shelving unit.
The present invention has several advantages.
The arrangement of the compressor in the lower region of the refrigeration shelf unit and the arrangement of the top of the condenser at least partially within the refrigeration shelf unit facilitates packaging and transportation of the refrigeration shelf unit, as packaging is not laborious at the manufacturing site, which also results in a packaged refrigeration shelf unit that is compact and small. Thus, no transportation costs are incurred during the transportation from the manufacturing site to the point of use.
Furthermore, this arrangement of compressor and condenser means that there is no contamination. The outside of the compressor does not accumulate dust and therefore is not isolated from the outside air. The heat discharge from the compressor to the surroundings is not affected, so that the energy consumption of the compressor is optimized. No cleaning work is required, which brings the advantage that no additional work and corresponding costs are incurred.
An advantageous embodiment of the refrigeration appliance according to the invention is characterized in that, on the one hand, the condenser is thermally and/or acoustically insulated with respect to the refrigeration chamber and/or, on the other hand, the compressor is thermally and/or acoustically insulated with respect to the refrigeration chamber. The advantages of improved efficiency and less emitted noise and vibration disturbances are thus achieved.
A further advantageous embodiment of the refrigeration appliance according to the invention is characterized in that, on the one hand, the condenser is accessible from the outside of the refrigeration appliance and/or, on the other hand, the compressor is accessible from the outside of the refrigeration appliance. Maintenance work can thus be carried out at the place of use without the refrigeration appliance having to be moved into position.
By arranging the condenser in the upper sub-chamber of the refrigeration appliance, maintenance work can be performed on the refrigeration shelf unit-specific refrigeration device from the front side without having to unload the articles (cooled articles) from the refrigeration chamber. The maintenance work can be performed by the assembling worker without requiring an assistant person or the assembling worker itself to perform the preparatory work (unloading the cooled article, etc.).
According to the present invention, by arranging the compressor in the refrigerating chamber, maintenance work can be easily performed from the front side. To this end, the air outlet element is released or removed from the refrigerated shelving unit; the now exposed compressor housing can thus be loosened and removed from the outer wall of the housing so that work can be performed directly on the refrigeration system and compressor without removing the compressor from the refrigeration shelving unit.
A further advantageous embodiment of the refrigeration appliance according to the invention is characterized in that the condenser is arranged in the condenser compartment. This has the advantage that the compartment in the condenser compartment is protected from damage and, in addition, the size of the refrigeration appliance is optimized. This facilitates packaging and shipping of the refrigeration appliance and provides a packaged refrigeration shelving unit that is compact and small. Thus, transportation costs are not increased during transportation from the manufacturing site to the point of use.
A further advantageous embodiment of the refrigeration appliance according to the invention is characterized in that the condenser compartment is designed to be releasably connected to the refrigeration appliance. This has the advantage that during maintenance, the condenser compartment as a whole has a condenser, a filter element, a shut-off member, a pressure sensor and a control element, the respective conduits being easily removable.
A further advantageous embodiment of the refrigeration appliance according to the invention is characterized in that the compressor is assigned a compressor housing arranged in the refrigeration appliance. This has the advantage that the refrigeration chamber of the refrigeration appliance is thermally and acoustically optimized, in particular that a reduction in the emitted noise and vibration disturbances can be perceived.
A further advantageous embodiment of the refrigerator appliance according to the invention is characterized in that the compressor housing is releasably connected to the refrigerator appliance. This has the advantage that the compressor housing can be loosened so that maintenance work can be performed directly on the compressor or on the piping without removing the compressor from the refrigeration shelving unit.
This advantage is also achieved in the case of a further advantageous embodiment of the refrigerator appliance according to the invention, which is characterized in that the compressor is accessible via the refrigeration chamber.
A further advantageous embodiment of the refrigerator according to the invention is characterized in that the refrigerator has a rear wall which has at least one air outlet element in the region of the compressor. This has the advantage that the compressor is cooled by natural exchange of air with the outside air.
A further advantageous embodiment of the refrigerator according to the invention is characterized in that the compressor is assigned a ("third") blower device for cooling it. This has the advantage that the compressor is cooled by the outside air which is drawn into the compressor compartment by the third blower device. Thereby preventing heating that would reduce the efficiency of the refrigeration operation and the useful life of the compressor.
A further advantageous embodiment of the refrigeration appliance according to the invention is characterized in that the control element is arranged in the condenser compartment and controls a secondary circuit medium (for example brine) which is fed through the condenser. This improves the efficiency of the heat exchanger.
A further advantageous embodiment of the refrigerator according to the invention is characterized in that the control device is arranged in a housing module and the housing module can be releasably connected to the refrigerator. This has the advantage that during maintenance, the control devices can be exchanged easily and the existing control circuit can be protected from contamination.
A further advantageous embodiment of the refrigerator according to the invention is characterized in that the condenser compartment is assigned a first insulation medium consisting of an insulation material, preferably based on elastomer, and/or a similar insulation material. This has the advantage that the condenser compartment is thermally insulated with respect to the cooling air.
A further advantageous embodiment of the refrigerator according to the invention is characterized in that the compressor, in particular the compressor housing, is assigned a second insulating medium, preferably based on synthetic rubber and/or composed of a similar insulating material. This has the advantage that the compressor is thermally and acoustically isolated with respect to the refrigeration chamber.
A further advantageous embodiment of the refrigeration appliance according to the invention is characterized in that the refrigeration shelf unit and the at least one further refrigeration shelf unit each have a refrigeration shelf unit-specific refrigeration device and the refrigeration shelf unit-specific refrigeration device has a line by means of which the refrigeration shelf unit-specific refrigeration devices can be connected to each other and/or to the at least one heat exchanger and in which lines media at different temperatures are conveyed.
Various advantages can thereby be achieved.
On the one hand, there is no need to lay a pipeline at the installation site. On the other hand, even if a single refrigeration shelf unit in the arrangement fails, operation of the arrangement of two or more refrigeration shelf units according to the present invention does not fail, and all additional refrigeration shelf units continue to operate in an unrestricted manner. Each individual refrigerated shelving unit contains the complete thermal refrigeration system and is therefore independent of the other refrigerated shelving units in the assembly.
The central refrigeration supply and thus the ducts used in refrigeration technology from such a central device to the individual refrigeration shelf units in the arrangement are omitted.
At the installation site, the refrigeration appliance according to the invention only needs to be connected to the power supply connector, the lines arranged on the refrigeration appliance for conveying one or two different coolant media being connected to corresponding lines of other parts of the refrigeration appliance or to lines of two adjacent parts of the refrigeration appliance.
This mounting (plugging of the plug into the socket; screwing of the line) can be performed by a person without expert technical knowledge, and therefore does not require experts in refrigeration technology, which means that the "plug-in" refrigeration shelving unit according to the invention is also characterized by relatively low mounting costs.
A further advantageous embodiment of the refrigerated shelving unit according to the invention is characterized in that the refrigerated shelving unit and the further refrigerated shelving unit are connected to one common heat exchanger. This has the advantage that only one heat exchanger is provided for the arrangement of two or more refrigerated shelving units in accordance with the invention.
Further advantageous embodiments of the refrigerated shelving unit according to the invention are characterized by the advantages of a modular design: the refrigeration shelving unit in accordance with the invention can be integrated both in an arrangement with only one refrigeration shelving unit and in an arrangement with a plurality of refrigeration shelving units, wherein a single refrigeration shelving unit is attached either directly to a heat exchanger or indirectly to a heat exchanger through a further refrigeration shelving unit or through a plurality of refrigeration shelving units.
The modular design can easily change the arrangement. For example, within the heat exchanger capacity, additional refrigeration shelf units may be integrated into the arrangement; individual refrigerated shelving units can be replaced and, ultimately, even removed or deactivated, for example, when demand is low.
The pipe connections are preferably identical, thus resulting in a refrigeration module with identical connections which can be easily connected to one another to form the entire arrangement.
A further advantageous embodiment of the refrigeration shelving unit according to the invention is characterized in that the refrigeration shelving unit and the further refrigeration shelving unit are connected to a common (central) heat exchanger and/or to a device (HZ) for discharging heat to the surroundings.
Thus, the heat generated in the refrigerated shelving unit or in the refrigeration appliance can be used in different ways: with the device as described above, the ambient temperature of the installation site can be raised in a controlled manner if desired.
Detailed Description
Fig. 1 shows a perspective view of an exemplary embodiment of a refrigerated shelving unit KR1 in accordance with the invention. The refrigerated shelving unit KR1 is substantially cubic; it is formed to be open on one side (front side) while its rear side, lower side, upper side, left side and right side are closed. The dark parts in fig. 1 show vertical side wall elements that are formed in a releasable manner on their right side. During a cooling operation, the cooling shelf unit is open on at least one side; the refrigerated item is thus freely accessible during the refrigeration operation. The refrigerated shelving unit may be formed with at least one releasable side wall element and/or with at least one releasable front side wall element.
For storing refrigerated goods, in particular perishable goods such as food, cosmetics, pharmaceuticals, three horizontally placed shelf elements RE1, RE2 and RE3 and a surface RE4 on the floor of the refrigeration shelf unit are provided in the refrigeration compartment (goods receiving space) in the example shown in fig. 1. Surface RE4 is positioned approximately at the same level as (lower) loading edge LK. Due to the special design of the refrigeration shelving unit, the loading edge LK is advantageously located only a few centimeters above the standing surface of the refrigeration shelving unit, as will be described below, so that the expansion of the refrigeration compartment in the lower region of the refrigeration shelving unit can be maximized.
Other configurations of the refrigerated shelving unit are shown in fig. 2 and 3.
Fig. 2 shows an exemplary embodiment of a refrigerated shelf unit KR1 according to the invention, which is connected to an external heat exchanger WT/HZ via two lines KR1L1, KR1L2 (in particular hose lines, possibly lines). Additional refrigerated shelf units (KR2 … KRN in fig. 3) may also be connected to the external central heat exchanger.
In the exemplary embodiment illustrated in fig. 2, the refrigerated shelf unit KR1 and the heat exchanger WT are located at two different locations spaced from each other by a spatial divider or wall WD. However, the heat exchanger WT may be arranged immediately adjacent to the refrigerated shelf unit KR1, e.g. on an upper side thereof.
In the exemplary embodiment of a refrigerated shelf unit KR1 according to the invention shown in the sectional view of fig. 2, with a refrigerated chamber KR1M, the refrigerated chamber shown in fig. 2 does not have the shelf elements RE1, RE2 and RE3 shown as an example in fig. 1.
Between the refrigeration compartment and the rear side of the refrigeration compartment is a chamber ("function or machine room") FR. In the exemplary embodiment shown in fig. 2, the function chamber FR has a vertical sub-chamber VR and upper and lower horizontal sub-chambers HR1, HR 2. The sub-chambers HR2, VR, HR1 form channels for cooling air KL and warming air WL.
The compressor KOM is arranged in a lower region of the vertical sub-chamber VR and the evaporator VERD is arranged in an upper region of the vertical sub-chamber VR.
The condenser VF, connected to the heat exchanger WT/HZ by two lines KR1L1 and KR1L2, is located outside the rear wall of the refrigeration shelf unit KR 1. In line KR1L1, the condenser VF is supplied with a first medium M1, in particular water with glycol additive, from the outlet (cold) of the heat exchanger. In contrast, in line KR1L2, the inlet (hot) of the heat exchanger is supplied with a second medium M2 from the condenser VF, which may be identical to the first medium M1. The medium M1 is typically at a temperature T1 in the range of about 10 ℃ to about 15 ℃, while the medium M2 is typically at a temperature T2 in the range of about 15 ℃ to 60 ℃.
The line connection between the two lines KR1L1 and KR1L2 and the corresponding line connection to the corresponding line of the heat exchanger WT/HZ are shown in fig. 3.
The compressor KOM is connected to the power supply connection WA by a cable.
A plurality of openings through which the cooling air KL flows into the refrigeration chamber KR1M are provided in the wall surface defining the refrigeration chamber KR1M and the function chamber FR. The cooling air KL also flows through the upper horizontal sub-chamber HR1 to the air outlet LA on the front side of the refrigerated shelf unit (left side in the cross-sectional view of fig. 2).
On the front side of the refrigeration shelf unit KR1 (left side in the sectional view of fig. 2), a first blower device VT1, in particular a fan, which supplies cooling air KL into the refrigeration compartment KR1M, is located at the air outlet LA. The blower unit VT1 forms a curtain of refrigerated air between the upper and lower regions of the refrigerated shelving unit. The air curtain provides insulation of the refrigeration compartment from ambient air. The cooled air output provided by the blower device can also be deflected in a controlled manner to each region of the refrigeration compartment, in particular for storing cooled goods.
In an alternative embodiment to the embodiment shown in fig. 2, the first blower device may be arranged in the rear region of the refrigeration shelf unit, in the functional compartment FR therein. The blower device can also be arranged below the evaporator VERD and thus bring about a compression of the air passing through the evaporator. In contrast to the manner shown in fig. 2, if the blower device is arranged above the evaporator, air is drawn over the evaporator. The arrangement is such that the cold energy is caused to fall along the rear wall of the refrigeration compartment by conduction means, in particular metal plates, arranged at least from the upper edge of the evaporator VERD down in the direction of the inner chamber to at most the height of the loading edge. The conductive device (metal plate) separates the warm air and the cooling air. The conduction means also causes cooling air to flow under the evaporator, through a slotted rear wall provided with openings or slotted, into the cooling chamber.
The curtain of refrigerated air provides insulation of the refrigerated compartment from ambient air. The cooled air output provided by the first blower device can be deflected in a controlled manner to each region of the refrigeration compartment, in particular to the region for storing the cooled goods.
On the front side of the cooling region KR1, the air inlet LE and the second blower device VT2 (in particular a fan) are located in the lower region of the loading edge LK. The fan sucks in the cooling air on the one hand after it has flowed through the refrigeration compartment or has been heated in the refrigeration compartment ("warm air WL"). On the other hand, the fan draws in cooling air that is not intended to pass through the lower region in front of the refrigerated shelving unit. The sucked air is supplied into the lower sub-chamber HR2 of the function chamber FR and into the vertical sub-chamber VR of the function chamber FR.
With respect to the second blower unit VT2, it should be appreciated that it is preferred that a small amount of cooled air exits the refrigeration compartment into the lower region in front of the refrigeration compartment.
In contrast to fig. 2, the second blower device may also be arranged in the rear region of the refrigeration shelving unit, both lower and upper regions.
After the cooling air passes through the refrigerating chamber or is heated in the refrigerating chamber ("warming air WL") is fed into the air inlet LE by negative pressure; in this case, the second blower device VT2 becomes redundant.
As already described in connection with fig. 1, the loading edge LK is advantageously located only a few centimeters above the standing surface of the refrigerated shelving unit. It will be appreciated that no part of the refrigeration shelf unit-specific refrigeration equipment (evaporator, condenser, compressor) is provided in the lower sub-chamber HR2 below the refrigeration chamber KR 1M.
The lower sub-chamber HR2 serves only as a passage for the warmed air WL; in contrast to the embodiment shown in fig. 2, the refrigeration device comprises an evaporator arranged outside the refrigeration shelving unit, in particular the refrigeration device (evaporator, condenser, compressor) is arranged above the refrigeration shelving unit or on the non-open side of the refrigeration shelving unit.
The refrigerated chamber is thus expanded and thereby maximized in the lower region of the refrigerated shelving unit.
Fig. 3 shows a schematic view of an arrangement of a plurality of refrigeration shelf units KR1 … KRN connected in series with each other and to a common (central) heat exchanger WT/HZ. The individual refrigerated shelf units KR1 … KRN may be arranged at the installation site just next to each other, i.e. without intermediate spacing, or alternatively may be arranged with intermediate spacing.
The refrigeration shelf units KR1 … KRN are connected in series: a refrigerated shelf unit failure, such as KR4, does not result in a refrigerated shelf unit KR1, KR2, KR3, KR5 … KRN failure; even after a failure, the piping of the failed refrigeration shelf unit may continue to unidirectionally convey the medium M1, M2 between the heat exchanger and the non-failed refrigeration shelf unit.
Each refrigeration shelving unit (e.g., KR1) has a refrigeration shelving unit-specific refrigeration equipment (e.g., KR1KE with evaporator VERD, condenser VF, compressor KOM), which has a first line KR1L1 and a second line KR1L 2. At the ends of the lines KR1L1, KR1L2 are line connections KR1L11, KR1L12 corresponding to line connections (WTL 1; WTL 2; KR2L 11; KR2L 21) of the units (e.g. WT/HZ, KR 2); KR1L21, KR1L22, the piping connections of the units and the adjacent of the respective refrigerated shelving unit (KR1 in this case) in the arrangement. The line connections are formed in particular identically, for example so-called quick couplings.
The refrigeration device KR1 according to the invention is formed in the following manner:
the refrigeration equipment KR1KE in the refrigerated shelf unit is connected to a first line KR1L1 for conveying a first medium M1 at a temperature T1 in a first temperature range, and the first line is for connection to the heat exchanger WT;
the refrigeration equipment KR1KE in the refrigerated shelf unit is also connected to a first line KR1L2 for conveying a second medium M2 at a temperature T2 in a second temperature range, and a second line for connection to the heat exchanger WT;
the first line KR1L1 has a first line connection KR1L11 corresponding to the line connection WTL1 of the heat exchanger WT and/or corresponding to the first line connection KR2L11 of the further refrigerated shelf unit KR2,
the first line KR1L1 also has a second line connection KR1L12 corresponding to the second line connection KR2L12 of the further refrigerated shelf unit KR2,
furthermore, the second line KR1L2 has a first line connection KR1L21 corresponding to the line connection WTL2 of the heat exchanger WT and/or corresponding to the first line connection KR2L21 of the further refrigerated shelf unit KR 2.
Finally, the second line KR1L2 has a second line connection KR1L22 corresponding to the second line connection KR2L21 of the further refrigerated shelf unit KR 2.
Fig. 4 shows a schematic view of an arrangement of a plurality of refrigeration shelf units KR1 … KRN connected in parallel to each other and to a common (central) heat exchanger WT/HZ.
In this arrangement, the "first" and "second" lines "of the condenser have only one line connection, in particular a through line leading to the heat exchanger.
The illustrated refrigeration shelf unit KR1 … KRN discharges thermal energy through a parallel connected condenser VF1 … VFN. In particular, the condensing pressure in the respective cold circuit (main circuit) is used as a control variable. In the main circuit, the condensing pressure is kept almost constant depending on the medium (brine) temperature. In the secondary circuit of the heat-discharge area, which includes the heat exchanger, energy is dissipated and the throughflow is controlled by a control valve. The control variable in the slave loop is also the condensing temperature. The volume flow is controlled in a control valve. The thermal energy is utilized by the common (central) heat discharge.
A shut-off valve is preferably provided on the heat exchanger, which shut-off valve can shut off the heat-discharge zone when the system is in service in order to keep the brine medium in the heat exchanger during service.
An advantageous feature of the parallel circuit shown is that, in the event of a failure of one of the components in the refrigeration appliance, the flow of refrigerant out of or to the heat exchanger is practically unchanged compared to the "non-failed" state. In this parallel arrangement, as opposed to the series arrangement of fig. 3, the refrigerant does not flow through the multiple condensers of the multiple refrigeration appliances that are connected in series, i.e., is not "in series".
One refrigeration shelf unit-specific refrigeration equipment KR1KE may also be assigned to at least two refrigeration shelf units KR1, KR2 in the arrangement of fig. 3 and 4.
Fig. 5 shows in cross-section an exemplary embodiment of a refrigerated shelving unit KR1 in accordance with the invention. It has a condenser chamber VFA in the upper horizontal sub-chamber and a compressor chamber KOA in the lower vertical sub-chamber. The condenser chamber VFA is located at least partially, and possibly even entirely, within the upper sub-chamber HR 1. In the front upper outside region AB there is located a control device ST of the refrigerator, wherein this is preferably arranged in a housing module which is releasably connected to the refrigerated shelving unit. Accordingly, the housing module may be separated from the refrigerated shelving unit during transport of the refrigerated shelving unit from the manufacturing site to the point of use, wherein the housing module is inserted into the refrigerated shelving unit at the point of use and is thus electrically connected thereto.
On the one hand, in the vertical sub-chamber VR there is located a section of the condenser VF, which is also arranged simultaneously in the horizontal sub-chamber HR1, and on the other hand in the vertical sub-chamber VR there is located: a compressor compartment KOA with a compressor housing KOMG, a second insulating medium ISO2, an associated compressor KOM and at least one air outlet element LAE.
The compressor compartment KOA is located in the lower region of the vertical sub-chamber VR of the refrigerated shelving unit KR 1. The compressor compartment KOA includes a compressor shell KOMG connected to a lower shell outer wall GAO and a backside backwall RW of the refrigeration shelf unit. Which receives a compressor KOM; the rear wall has at least one air outlet element LAE in the region of the compressor KOM.
A compressor housing KOMG releasably connected to the refrigeration shelf unit; if the compressor housing is removed, the compressor KOM can be accessed from the front side via the refrigeration compartment KR 1M. The shelf element RE1 (fig. 1) and the air outlet element LAAE (fig. 1) are released or separated from the refrigeration shelf unit KR1, releasing and removing the exposed compressor shell KOMG from the lower shell outer wall GAO and the rear wall RW, so that work can be performed directly on the refrigeration system and compressor without removing the device from the assembly.
A refrigerant line KML passes from the compressor KOM through the compressor housing KOMG via a line passage LTD in the direction of the upper evaporator VD and the condenser VF. The compressor casing KOMG prevents heat exchange between the outside air AL and the warm air WL.
The second insulating medium ISO2 insulates thermally and acoustically the compressor KOM from the refrigeration compartment KR 1M; it is intended to thermally isolate the warm air WL and the outside air AL from one another and additionally from the compressor housing KOMG. For example, a second insulating medium ISO2 is applied on the upper and front side inside the compressor housing KOMG. For example, the insulating medium ISO2 may include at least one self-adhesive foam element and/or at least one insulating panel.
In further embodiments, the compressor shell KOMG may be partially or entirely provided with a barrier coating on the inside or outside. The compressor housing KOMG and the second insulating medium ISO2 thus form a constructional unit.
The compressor KOM is attached to the lower shell outer wall GAO. The air outlet element LAE is formed as a covering element with an outlet, which constitutes a closure of the compressor housing KOMG on the rear wall RW of the refrigeration shelf unit KR 1.
For cooling the compressor KOM, a third blower device VT3 may additionally be arranged on the inside or outside of the refrigeration shelf unit. The refrigeration shelf unit may be formed without the air outlet element LAE.
The compressor housing KOMG and the second insulating medium ISO2 attenuate the noise emanating from the compressor KOM and guide them backwards in the direction of the rear wall RW (or wall WD in fig. 2), which makes the noise perceptible in the direction of the user (left side of fig. 5, opening access area of the refrigerated shelving unit).
The condenser compartment VFA is located at least partially within the upper horizontal sub-chamber HR 1. It includes: the condenser housing VFG, the condenser VF, in particular a heat exchanger of plate or tube bundle, a refrigerant line KML in liquid communication with the evaporator VF, the compressor KOM, which refrigerant line KML serves as a primary circuit, denoted PK.
The condenser VF is in thermal communication with the slave loop SK. This includes: a first line KR1L1 with a control element RE, which first line supplies a loop medium (e.g. brine liquid) to the heat exchanger WT/HZ (fig. 2); and a second line KR1L2 (not shown in fig. 5, see arrow to the right) that returns the loop medium to the condenser VF.
The condenser compartment VFA and the condenser casing VFG embedded in the upper horizontal sub-chamber HR1 are formed similarly to the compressor casing KOMG described above and prevent thermal communication between the outside air AL and the cooling air KL.
The air supply for cooling the refrigerating chamber KR1M has already been described with reference to fig. 2.
In the embodiment shown in fig. 5, the condenser casing VFG is trough-shaped, but the condenser compartment VFA may be made in other shapes.
The condenser compartment VFA is incorporated, for example, into an existing insulating element ISOE, in particular a sandwich panel with a first insulating medium ISO1, which will be described below with the aid of fig. 7. It may be designed as a separate condenser housing VFG, in particular as a slot bent out of steel plate, which may be integrated or incorporated in the spacer element ISOE.
In particular, the entire spacer ISOE with the condenser compartment VFA may be manufactured as one piece. The first insulating medium ISO1 arranged in the condenser compartment VFA is integrated in this component and does not have to be additionally incorporated.
The control ST of the refrigeration shelving installation communicates with the refrigeration shelving unit-specific refrigeration device KR1KE, in particular the compressor KOM, the first blower device VT1, the control valve RV, the control element RE, a pressure sensor DA2 measuring the condensation pressure, and a pressure sensor DA1 arranged in the inlet region of the compressor KOM and measuring the pressure at the inlet duct, in the main circuit PK.
A control element RE arranged in the slave circuit SK downstream of the condenser VF controls a through-flow through the condenser VF, so-called slave circuit medium, in particular brine. The control of the control element RE is effected by means of the condensation pressure in the main circuit PK. The control element RE can be mechanically or electrically controlled by means of a pressure sensor DA2 and a control device ST, leading via a first line KR1L1 to the heat exchanger WT/HZ (fig. 2) and via a second line KR1L2 back to the condenser VF.
The exemplary embodiment illustrated in fig. 6 is a modification of the first refrigerated shelving unit KR1 of fig. 5. In contrast to the exemplary embodiment of fig. 5, the condenser compartment VFA is protected against dust and contamination by the cover element AE. The condenser VF and the further refrigeration shelving unit-specific refrigeration equipment KR1KE are also at least partially arranged in the upper horizontal sub-chamber HR1 and protected by the covering element AE. The covering element AE is in particular a variously shaped covering hood made of one or more parts and is formed such that it has a covering surface which is larger than the surface of the condenser compartment VFA. In particular, it may be releasably attached to the first insulating element ISO1 by screws.
The covering element AE can also cover the control device ST at the same time; alternatively, a further covering element (not shown in fig. 6) can be provided, which covers the control device ST exclusively. The covering element AE has, for example, an additional opening allowing the exchange of air between the condenser compartment VFA and the external area AB.
The condenser VF is formed as a plate heat exchanger, for example. The accumulator KOL is additionally incorporated into the main circuit PK. The refrigerant travels from the upper horizontal sub-chamber HR1 to the collector KOL. The accumulator KOL is formed as a container with openings at the top and bottom connected to refrigerant lines KML1 and KML 2. The accumulator KOL is connected via an upper opening to a refrigerant line KML1 and from below to a refrigerant line KML2 which projects into the accumulator KOL.
The accumulator KOL receives the refrigerant KM and keeps the refrigerant KM in buffer type until it reaches the level of the upper edge OBK of the refrigerant line KML2 projecting into the accumulator KOL. The upper edge OBK of the lower refrigerant line KML2 causes refrigerant overflow, whereby liquid refrigerant KM is continuously supplied to the evaporator VERD.
The exemplary embodiment shown in fig. 7 illustrates a further variation of the refrigerated shelving unit KR1 shown in fig. 5, the upper region of the refrigerated shelving unit KR1 being shown in detail in cross-section. The upper horizontal sub-chamber HR1 is subdivided into a lower region which supplies cooling air KL and discharges this air from the air outlet LA to the article chamber KR1M, and a region thereabove which contains the isolation element ISOE with the integral condenser compartment VFA.
In this variant, a simplified embodiment of an isolation element ISOE with an integrated condenser compartment VFA in the upper horizontal sub-chamber HR1 is shown. The spacer elements ISOE are designed as so-called sandwich panels and will be described in the following examples.
The air supply of the cooling air KL is described in more detail in connection with fig. 2. In this embodiment of the condenser compartment VFA, use is made of conventional sandwich plates, in particular having a thickness of at least 4 cm. Sandwich panels comprising an outer wall AW and an inner wall IW of a bend-resistant material, such as in particular steel, wood, synthetic material or composite material, and an insulation material IS, in particular polyurethane, lying between them. In the region of the condenser compartment VFA, the outer wall AW and the insulation material IS are removed from the insulation element ISOE until only the inner wall IW remains in this region. This inner wall IW serves as an attachment means for cooling the shelving unit-specific refrigeration equipment KR1 KE. In the resulting condenser compartment VFA, in particular on the sides and on the floor, the insulation medium ISO1 is inserted as already described for the compressor housing KOMG in the case of the second insulation medium ISO2 with the aid of fig. 5.
In a further, not shown embodiment of fig. 7, the control device ST is lowered at least partially into the upper horizontal sub-chamber HR 1.
Fig. 8 shows an exemplary embodiment of a refrigerated shelving unit KR1 in accordance with the invention in top view. Fig. 8 shows the insulating element ISOE with the control device ST and the condenser chamber VFA embedded in the insulating element ISOE. The configuration of the condenser shell VFG and the first insulating medium ISO1 corresponds to the embodiment of fig. 5. The refrigeration shelf unit-specific refrigeration device KR1KE arranged in the condenser compartment VFA is in the main circuit PK a second pressure sensor DA2, a condenser VF, a filter element FT and a shut-off member AO.
The refrigerant line KML of the main circuit PK passes through the line channel LTD into the vertical sub-chamber VR and is connected to a further refrigeration shelving unit-specific refrigeration equipment KR1 KE. The complete main circuit PK of the freezing cycle has been shown in figures 5 and 6.
The condenser comprises a respective condenser inlet VFAE and condenser outlet VFAB. The condenser VF may be flat on the condenser casing VFG or fixed to the condenser casing VFG by fastening members BFM. The refrigerant KM flows from the condenser outlet VFAB through the filter element FT, in particular a filter drier which traps water and solids from the refrigerant KM, and further through the shut-off means AO which automatically closes when the compressor KOM is inoperative or malfunctioning and thereby prevents the liquid refrigerant KM from flowing through the evaporator VERD into the inlet region of the compressor KOM, which would otherwise lead to damage to the compressor KOM upon restart, the so-called liquid slugging. The slave loop SK of fig. 8 corresponds to the slave loop of fig. 5.
In the refrigeration appliance according to the invention, the condenser VF is arranged at least partially in the upper region HR1 of the refrigeration shelf unit KR1 and the compressor KOM is arranged in the lower region VR of the refrigeration shelf unit KR 1. The condenser VF is thermally and/or acoustically isolated with respect to the refrigeration chamber KR 1M; similarly, the compressor KOM is thermally and/or acoustically insulated with respect to the refrigeration compartment KR 1M.
The condenser VF is accessible from the outside of the refrigeration appliance; similarly, the compressor KOM is also accessible from the outside of the refrigeration appliance.
The condenser VF is arranged in a condenser compartment VFA, which is preferably designed to be releasably connected to a refrigeration appliance. The compressor KOM is assigned a compressor housing KOMG which is arranged in the refrigeration appliance and is preferably releasably connected to the refrigeration appliance. The compressor KOM is accessible via the refrigeration compartment KR 1M. The refrigerator has a rear wall RW which has at least one air outlet element LAE in the region of the compressor KOM. The compressor KOM is assigned a third blower unit VT3 for cooling it. The control element RE is arranged in the condenser compartment VFA and controls the slave loop medium SK flowing through the condenser VF. The refrigeration device control ST in the housing module is arranged on the refrigeration device and the housing module can be releasably connected to the refrigeration device. The condenser compartment VFA is assigned a first insulation medium ISO1 consisting of an insulation material based on, in particular, synthetic rubber and/or similar insulation materials. The compressor housing KOMG is assigned a second insulating medium ISO2 made of an insulating material, in particular a synthetic rubber-based insulating material, and/or a similar insulating material.
List of reference numerals
KE1 refrigeration equipment in refrigeration shelf unit
WT heat exchanger
WTL1, WTL2 from first and second conduits of the WT
HZ device, heating
M1 first Medium
M2 second Medium
Temperature in the first temperature range of T1
Temperature in the second temperature range of T2
KR1 (first) refrigerated shelf unit
KR1M KR1 refrigerating chamber
RE1, RE4 horizontal shelf element
LK lower loading edge
FR function room
VR vertical sub-chamber
HR1 upper horizontal subchamber
HR2 lower horizontal subchamber
Refrigeration shelf unit-specific refrigeration device of KR1KE KR1
KOM compressor
VERD evaporator
VF condenser
KR1L1 first line from KR1
KR1L11 first line connection from KR1L1
KR1L12 second line connection from KR1L1
KR1L2 second line from KR1
KR1L21 first line connection from KR1L2
KR1L22 second line connection from KR1L2
VT1 first blower device, Fan
VT2 second blower device, Fan
NA power supply connector
WD wall
KL cooling air
WL heated air
LA air vent
LE air inlet
KR2 first (second) refrigerated shelf unit
KR2M KR2 refrigerating chamber
Refrigerated shelving unit-specific refrigeration appliance of KR2KE KR2
Condenser of KR2KEVF KR2KE
KR2L1 first line from KR2
KR2L11 first line connection from KR2L1
KR2L12 second line connection from KR2L1
KR2L2 second line from KR2
KR2L21 first line connection from KR2L2
KR2L22 second line connection from KR2L2
KRN Nth refrigeration shelf unit
VT3 third blower device, Fan
KOMG compressor shell
VFA condenser cabinet
ISO1 first insulating medium
ISO2 second insulating medium
ISOE isolation element
LAH rear air outlet
LEH rear air inlet
LAE air outlet element
ST control device
AE covering element
RE control element
AO cutting member
KOL collector
LTD pipeline channel
FT filter element
IW inner wall
AW outer wall
IS isolation element
AB outer region
Around UG
DA1 pressure sensor 1
DA2 pressure sensor 2
KML coolant line
Outer wall of the GAO casing
VFG condenser shell
Outside air of AL
RV control valve
RW rear wall
PK main loop
SK slave loop (Medium)
AB outer region
UG surroundings
VFAE condenser inlet
VFAB condenser outlet
KM refrigerant
BFM fastening device
LAAE air outlet element
KML1 first refrigerant line
KML2 second refrigerant line
OBK upper edge
KOA compressor cabin