CN101294568A - Rotary compressor with enhanced vapor injection function - Google Patents

Abstract

The invention relates to a rotary compressor with an enhanced vapor injection function, wherein one or more gas injection holes are formed in an upper bearing or a lower bearing of the rotary compressor and are matched with a pipeline, so that a cylinder of the compressor can be communicated with the outside of the compressor through the gas injection holes and the pipeline, a one-way valve is arranged at the gas injection hole, so that external fluid can enter the cylinder through the pipeline and the gas injection holes, and the fluid in the cylinder cannot be discharged through the gas injection holes and the pipeline. The invention improves the structure of the traditional rotary compressor, so that the refrigerant in a gaseous form can be injected into the compressor cylinder through a pipeline, the suction temperature of the rotary compressor is improved, the compression efficiency is improved, and the rotary compressor has the advantage of energy conservation.

Description

Rotary compressor with air injection enthalpy-increasing function

Technical field

The present invention relates to rotary compressor.

Background technique

Common rotary compressor comprises cylinder, upper bearing (metal), lower bearing, bent axle, motor, slide plate, roller etc.The relief opening of intakeport that radially the offering of cylinder is not with Aspirating valves and band outlet valve, roller is contained on the eccentric crankshaft, roller rolls along cylinder inner wall, form a meniscate active chamber with cylinder, slide plate makes its end closely contact with roller by the active force of spring, the crescent shape active chamber is divided into two-part, the rolling of slide plate and roller rotates along vane slot, on, lower bearing is positioned on the cylinder, following two ends, with cylinder inner wall, the roller outer wall, the point of contact, slide plate constitutes the volume of cylinder of sealing, it is element volume, its volume size is along with the corner of roller changes, the pressure of gas then changes along with the size of element volume in the volume, thereby finishes the working procedure of compressor.

Air-conditioning system generally comprises compressor, outdoor heat exchanger, throttling arrangement, liquid container, indoor heat exchanger and connects the pipeline of said modules successively, and its working principle repeats no more herein.Along with the reduction of outdoor temperature, the inhalation temperature of compressor also decreases air-conditioning system when heating.What traditional air-conditioning system adopted is common compressor, when spending, operating mode more than ten can reach comparatively ideal heating effect, but when subzero 20 spend the left and right sides, its heating capacity decay is very serious, heating capacity does not reach rating value, heating effect is undesirable, even when operating mode was very low, air conditioner can not start.

In order to address the aforementioned drawbacks, prior art adds a steam injection system in air-conditioning system, be ejected in the space of lower pressure in the compressor hyperbaric chamber by the part of this steam injection system with the refrigeration agent (the liquid level top obtains from liquid container usually) of gaseous form.The injection of this gaseous refrigerant has the effect that increases refrigeration or improve the power system capacity and the efficient of air-conditioning system, thereby improves the heating capacity of air-conditioning system under the low-temperature heating situation.

Yet existing technology by steam injection system raising air-conditioning system heating capacity is mainly used in also not being applied in the rotary compressor field in scroll compressor and the air-conditioning system thereof.

Summary of the invention

The object of the present invention is to provide a kind of rotary compressor with air injection enthalpy-increasing function.

Above-mentioned purpose is realized by following technological scheme:

A kind of rotary compressor with air injection enthalpy-increasing function, it is characterized in that, offer one or more fumaroles on upper bearing (metal) in rotary compressor or the lower bearing, these one or more fumaroles cooperate with a pipeline, make that cylinder of compressor can be by described fumarole and pipeline and compressor external communications, the fumarole place is provided with an one-way valve, makes external fluid to enter in the cylinder through described pipeline and fumarole, and the fluid in the cylinder can not be discharged through described fumarole and pipeline.

The present invention is than the beneficial effect of prior art, improved the structure of traditional rotary compressor, made the refrigeration agent of gaseous form to be ejected in the compresser cylinder, improved the inhalation temperature of rotary compressor by a pipeline, improve compression efficiency, and had energy-saving advantages.Adopt the air-conditioning system with rotary compressor of vapour injection function provided by the invention, can improve the heating capacity of air-conditioning system under the low-temperature heating situation.

Description of drawings

The internal structure schematic representation of the rotary compressor that Fig. 1 provides for embodiment one with air injection enthalpy-increasing function;

The partial schematic diagram of the longitudinal cross-section of the rotary compressor that Fig. 2 provides for embodiment one with air injection enthalpy-increasing function;

The partial schematic diagram of the longitudinal cross-section of the rotary compressor that Fig. 3 provides for embodiment two with air injection enthalpy-increasing function;

Fig. 4 is the schematic representation of rotary compressor use in air-conditioning system with air injection enthalpy-increasing function provided by the invention.

Description of reference numerals is as follows:housing 11,cylinder 12, upper bearing (metal) 13,lower bearing 14,bent axle 15,slide plate 16,roller 17,intakeport 121,relief opening 122, fumarole 211,212,pipeline 22,link 23,seal ring 24,steel ball 25,rotary compressor 30,outdoor heat exchanger 31,first throttle device 32, liquid-storage container 33,second throttling arrangement 34,indoor heat exchanger 35,solenoid valve 36.

Embodiment

Embodiment one

Please in conjunction with consulting Fig. 1 and Fig. 2, the rotary compressor that present embodiment provides comprises:housing 11,cylinder 12, upper bearing (metal) 13,lower bearing 14,bent axle 15, motor (not shown),slide plate 16, roller 17.Therelief opening 122 ofintakeport 121 that radially the offering ofcylinder 12 is not with Aspirating valves and band outlet valve,roller 17 is contained on theeccentric crankshaft 15,roller 17 rolls alongcylinder 12 inwalls, form a meniscate active chamber withcylinder 12,slide plate 16 makes its end closely contact withroller 17 by the active force of spring, the crescent shape active chamber is divided into two-part,slide plate 16 rotates along vane slot with the rolling ofroller 17, metal (upper 13,14 are positioned incylinder 12 two ends, withcylinder 12 inwalls,roller 17 outer walls, the point of contact,slide plate 16 constitutes the volume of cylinder of sealing, it is element volume, its volume size is along with the corner ofroller 17 changes, the pressure of gas then changes along with the size of element volume in the volume, thereby finishes the working procedure of compressor.

In conjunction with consulting Fig. 1 and Fig. 2, offer two fumaroles 211,212 (only having shownfumarole 211 among Fig. 2) on thelower bearing 14, two fumaroles 211,212 are opened in the place apart from cylinder axis 1～2cm, and certainly the number of fumarole also can be one or more than two.Lower bearing 14 offer fumarole 211,212 places below apilot hole 213 also is set,pilot hole 213 upwards is communicated withcompresser cylinder 12 by fumarole 211,212, the diameter of fumarole 211,212 is all less than the radius of describedpilot hole 213, and fumarole 211,212 all departs frompilot hole 213 axle center certain distance settings.

As shown in Figure 2, an end of apipeline 22 stretches into compressor inside, and the other end is arranged on the outside of compressor.In the present embodiment,pipeline 22 cooperates with describedpilot hole 213 by a black box, the sealing assembly comprises an aconnection piece 23 and aseal ring 24,link 23 has first opening end and second opening end, first opening end combines with the opening end sealing of describedpipeline 22, and second opening end is installed in the describedpilot hole 213, and the outer rim of this second opening end offers circular groove, installingseal ring 24 in the circular groove,seal ring 24 combines with the sidewall sealing ofpilot hole 213.

Enter in thecylinder 12 in order to make external fluid can reach fumarole 211,212 by the road, and the fluid in thecylinder 12 can not be discharged through the path that described pipeline is formed, and need one one-way valve be set at fumarole 211,212 places.In the present embodiment, the opening of second opening end oflink 23 is circular, and this opening is provided with asteel ball 25, and the diameter ofsteel ball 25 is greater than the diameter of the second opening end opening, less than the diameter ofpilot hole 213, thereby thissteel ball 25 cooperates with the second opening end opening and has formed described one-way valve.The active force of givingsteel ball 25 when external fluid is during greater than the active force ofcylinder 12 inner fluids,steel ball 25 moves up, and the entity part between the fumarole 211,212 is replaced on its top, thus unlikely shutoff fumarole 211,212, at this moment, external fluid can enter in thecylinder 12; The active force of givingsteel ball 25 when the cylinder inner fluid is during greater than the active force of external fluid,steel ball 25 moves down, thereby the circular open of second opening end ofshutoff link 23 makes that the fluid in thecylinder 12 can not discharge through fumarole 211,212 andpipeline 22.

Embodiment two

Please join Fig. 3, be with embodiment one difference, in the rotary compressor that embodiment two provides with air injection enthalpy-increasing function, fumarole the 211, the 212nd is opened on the upper bearing (metal) 13, upper bearing (metal) offer fumarole 211,212 places above a pilot hole is set, pilot hole is communicated withcompresser cylinder 12 downwards by fumarole 211,212, and the diameter of each fumarole is all less than the radius of described pilot hole, and fumarole all departs from the certain distance setting of pilot holeaxle center.Pipeline 22 cooperates by the fumarole of offering onlink 23,seal ring 24 and the upper bearing (metal) 13 211,212, thereby with cylinder of compressor and external communications.

Fig. 4 is the schematic representation of rotary compressor use in air-conditioning system with air injection enthalpy-increasing function provided by the invention.Air-conditioning system shown in the figure comprises:rotary compressor 30,outdoor heat exchanger 31,first throttle device 32, liquid-storage container 33,second throttling arrangement 34,indoor heat exchanger 35 reach the connecting tube that connects above each assembly successively.Wherein, described compressor adopts the rotary compressor that embodiment one or embodiment two provide.Wherein, the fumarole of offering on upper bearing (metal) 13 or thelower bearing 14 in an end ofpipeline 22 and the rotary compressor is communicated with cooperation, and the other end is arranged on the top of liquid level in the liquid-storage container 33.Onesolenoid valve 36 is set on thepipeline 22, makes when describedsolenoid valve 36 is opened, be used for the on-off ofpilot line 22.

Claims (5)

1. rotary compressor with air injection enthalpy-increasing function, it is characterized in that, offer one or more fumaroles on upper bearing (metal) in rotary compressor or the lower bearing, these one or more fumaroles cooperate with a pipeline, make that cylinder of compressor can be by described fumarole and pipeline and compressor external communications, the fumarole place is provided with an one-way valve, make external fluid to enter in the cylinder, and the fluid in the cylinder can not be discharged through described fumarole and pipeline through described pipeline and fumarole.

2. the rotary compressor with air injection enthalpy-increasing function as claimed in claim 1, it is characterized in that, upper bearing (metal) or lower bearing also are provided with a pilot hole offering one or more fumaroles place, pilot hole is communicated with compresser cylinder by fumarole, the diameter of described one or more fumaroles is all less than the radius of described pilot hole, and fumarole all departs from the certain distance setting of pilot hole axle center.

3. the rotary compressor with air injection enthalpy-increasing function as claimed in claim 2, it is characterized in that, described pipeline cooperates with described pilot hole by a black box, the sealing assembly comprises an a connection piece and a seal ring, link has first opening end and second opening end, first opening end combines with the opening end sealing of described pipeline, second opening end is installed in the described pilot hole, the outer rim of this second opening end offers circular groove, installing seal ring in the circular groove, seal ring combines with the sidewall sealing of pilot hole.

4. the rotary compressor with air injection enthalpy-increasing function as claimed in claim 3, it is characterized in that, the opening of second opening end of described link is circular, this opening is provided with a steel ball, the diameter of steel ball is greater than the diameter of the second opening end opening, and this steel ball cooperates the described one-way valve of formation with the second opening end opening.

5. as claim 3 or 4 described rotary compressors, it is characterized in that, also comprise a fixed block, described link is fixedlyed connected with upper bearing (metal) or lower bearing with air injection enthalpy-increasing function.

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