CN102635905A - Combined heat pump type low-temperature total heat recovery fresh air handling unit with regeneration rotating wheel for dehumidification - Google Patents

Abstract

The invention relates to a combined heat pump type low-temperature total heat recovery fresh air handling unit with regeneration rotating wheel for dehumidification, belonging to the field of energy utilization technology and air conditioning. The fresh air handling unit consists of an air-air heat recovery unit, a dehumidification rotating wheel, an air exhaust part, a fresh air part and a heat pump system, wherein the heat pump system comprises a compressor, a condenser, a four-way reversing valve, a condenser, a condensation heat recoverer, an evaporator and a throttling part; new exhaust air is subjected to preliminary total heat recovery by utilizing the air-air heat recovery unit, the dehumidification rotating wheel is regenerated by utilizing the condensation heat quantity of the heat pump system, and an exhaust fan brings away the moisture adsorbed by the dehumidification rotating wheel; and the fresh air is pre-cooled and dehumidified by utilizing the evaporator of the heat pump system so as to further carry out adsorption type dehumidification on the fresh air through the dehumidification rotating wheel. The heat pump system provides the required cold quantity and recoverable heat quantity for a dehumidification system.

Description

Combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit

Technical field

The present invention relates to a kind of full heat recovery fresh air unit, particularly combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit.

Background technology

China's civil buildings air-conditioning system mostly adopts new return air mixed mode, because most of air is in indoor circulation, being discharged to of making that pollutant can not be very fast is outdoor, and harm humans is healthy.Strengthen the resh air requirement method of operation of brand-new wind (or adopt), can indoor harmful substance dilute and discharge outdoorly, obviously improve indoor air quality.But then, the increase of resh air requirement makes new wind handle energy consumption to be increased greatly, and new wind load accounts for the 30%-40% of air-conditioning total load.To the at present dehumidification modes that adopt chilled water or directly evaporate of processing mode of air, there is the drawback of the following aspects in this air conditioning mode: one, the condensation temperature of air cooling refrigeration machine is higher, and Energy Efficiency Ratio is low more in addition; Two, for lower chilled water temperature is provided, need lower evaporating temperature, the efficient of cooling-water machine is also decreased; Three, be difficult to adapt to the variation of heat moisture ratio.Only through evaporation mode air is cooled off and dehumidify, the sensible heat of its absorption and latent heat are than can only changing in certain scope, and the heat moisture ratio of building actual needs changes in the larger context.Generally be the control of sacrificing, compromise, cause the too high or too low phenomenon of indoor relative humidity through the requirement of only satisfying indoor temperature to humidity; Four, because of the low excessively existence that causes condensed water of leaving air temp, the surface of coil pipe has formed the hotbed that grows various moulds, has worsened indoor air quality, causes multiple Cure of Sick Building Syndrome.

This combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit; Its basic function is: new wind and air draft are carried out preliminary full recuperation of heat through the air-air heat reclamation device earlier; Through the evaporimeter of heat pump new wind is carried out the latent heat and the part sensible heat of the new wind of precooling dehumidification treatments then; Through desiccant wheel the further absorption type of new wind is dehumidified again and handle the latent heat of new wind, thereby do not exist leaving air temp to cross low and danger dewfall; Utilize the condenser heat of heat pump that desiccant wheel is regenerated simultaneously, take away the moisture of desiccant wheel absorption through exhaust blower.The fresh air processor group is also born simultaneously and is removed indoor CO2, peculiar smell, to guarantee the task of IAQ.

In central air conditioner system, need the fresh air processor group that dry outdoor new wind is provided, to satisfy hydrofuge, row CO2, to arrange the demand of distinguishing the flavor of and fresh air being provided.The traditional rotating wheel dehumidification mode is to be the renewable sources of energy with steam, high-temperature-hot-water and electric heating, and utilization efficiency of heat energy is low, its essence is that dehumidifying and these two processes of regeneration all are constant-enthalpy processes and non-isothermal process causes very big irreversible loss.Use the renewable sources of energy instead heat pump and then solved this problem, thereby realize moisture absorption process, thereby improved the Energy Efficiency Ratio of unit greatly near isothermal.

The present invention with indoor low humidity air draft as regeneration wind; Utilize the heat pump condensation heat as reactivation heat; Make low taste thermal source be able to utilize because heat pump can obtain the heat of Duo than drive energy, help energy-conservation with improve the environmental situation that causes because of fire coal, fuel oil.

Summary of the invention

The object of the invention aims to provide a kind of simple and reasonable, combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit that energy consumption is low, to overcome weak point of the prior art.

By the combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit of this purpose design, form by air-air heat reclamation device, desiccant wheel, air draft part, new wind part and heat pump.Solid line is represented the refrigeration working medium flow duct among the figure.The air draft treatment channel of system gets into the air-air heat reclamation device by lower floor carries out arriving the upper strata passage after the preliminary full recuperation of heat, discharges outdoor successively behind the regenerating section of condenser through heat pump and desiccant wheel; New wind treatment channel gets into the air-air heat reclamation device by the upper strata carries out arriving lower floor's passage after the preliminary full recuperation of heat, behind the condensation heat recover of the evaporimeter through heat pump, the absorbent portion of desiccant wheel and heat pump in the inlet chamber.

Described combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit; It is characterized in that said air-air heat reclamation device is for there being multiple pattern and material (as: the 1. special refill full heat recovery device of rhombus or hexagon; 2. rhombus or hexagon aluminium core heat recovering device; 3. full heat exchange is rotary-type, 4. the hot pin formula) a kind of heat reclamation device.

Said desiccant wheel is divided into dehumidifying part and regenerating section.

The c interface of four-way change-over valve is connected with an end of condenser in the said heat pump; The a interface is connected with the exhaust outlet of compressor; The b interface is connected with the air entry of compressor, and the d interface is connected with an end of evaporimeter, and the other end of condenser is connected with the other end of evaporimeter through throttle part.

Also be connected with first magnetic valve between said condenser and the throttle part, the first magnetic valve two ends are parallel with the condensation heat recover, wherein, the end that first magnetic valve is connected with condenser be connected with the condensation heat recover through second magnetic valve; The condensation heat recover is arranged on new wind air outlet place.

Said new wind partly is connected with new wind porch through the air-air heat reclamation device; Air draft partly is connected with indoor exhaust wind mouth place through the air-air heat reclamation device, reclaims the energy of indoor exhaust wind, further improves heat recovery efficiency;

When outdoor air is the high temperature humid air; Compressor and starting, outdoor new wind passes through air-air heat reclamation device and evaporimeter successively, be evaporated device precooling dehumidifying after; Indoor through sending into after desiccant wheel dehumidifying and the intensification of condensation heat recover again, to reach required air-out humiture.The purpose of air-air heat reclamation device is that preliminary full recuperation of heat is carried out in new air draft; The purpose of evaporimeter is the low dew-point temperature through refrigerant evaporation, removes the moisture in the moist outdoor new wind of high temperature.The purpose of desiccant wheel is with the mode of absorption type dehumidifying, removes the latent heat in the new wind, reaches required air-out water capacity.Indoor exhaust wind is passed through air-air heat reclamation device and condenser successively, utilizes condensation heat as reactivation heat, and to desiccant wheel regeneration, outdoor airborne moisture discharge, heat pump plays a part to reduce power consumption and improves Energy Efficiency Ratio.

When outside air temperature is fit to, indoor temperature and humidity is crossed when low, close compressor, air and the air from outdoor inlet chamber in outdoor from indoor discharge carry out ventilation.

When outdoor air is the low temperature drying air; Compressor and starting, a of four-way change-over valve, d interface are communicated with, and b, c interface are communicated with; Through the mutual conversion of cross valve switching-over realization evaporimeter and condenser, also conversion each other of the dehumidifying of desiccant wheel part and regenerating section simultaneously.The new wind of open-air seasoning, low temperature passes through the regenerating section of air-air heat reclamation device, condenser, desiccant wheel successively, new wind be heated send into behind the humidification indoor.The heat exhaust of condenser is used to heat new wind.Indoor hot and humid air is through air-air heat reclamation device, evaporimeter and rotary wheel dehumidifying part; Be discharged from outdoor behind the cool-down dehumidification; Cooling through evaporimeter improves the relative humidity of air, helps improving the wettability power of desiccant wheel dehumidifying part, and it is used to supply with new wind portion wind humidification.First magnetic valve is opened, second closed electromagnetic valve, and the condensation heat recover is not worked.

When outside air temperature be fit to, when indoor temperature and humidity is too high, close compressor, air and the air from outdoor inlet chamber in outdoor from indoor discharge carry out ventilation.

The present invention adopts heat pump techniques and the desiccant wheel processing air conditioner fresh air that combines, and through filtering and sterilizing unit can be removed the dust and the bacterium of carrying secretly in the air in that new wind is partly additional, plays the effect that purifies air, and has improved indoor air quality; Additional heat water coil and humidifier can be in the winter time to the further warming and humidifyings of new wind; System can reclaim the energy of indoor exhaust wind, has reduced new wind and has handled energy consumption; Utilize condensation heat that heat pump produces as reactivation heat, make low taste thermal source be able to utilize because heat pump can obtain the heat of Duo than drive energy, help energy-conservation with improve the environmental situation that causes because of fire coal, fuel oil.

Description of drawings

Fig. 1 is one embodiment of the invention operation principle sketch map-summer system's service chart.

Fig. 2 is another embodiment of the present invention operation principle sketch map-winter system's service chart.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further described.

Referring to Fig. 1, this combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit is made up of air-air heat reclamation device, desiccant wheel, air draft part, new wind part and heat pump.Desiccant wheel is 12; Heat pump comprises compressor 1, four-way change-over valve 2,evaporimeter 10, condenser 3, condensation heat recover 6 and throttle part 9; The air draft part is carried out by exhaust blower 4, and new wind part is carried out by new blower fan 7.

The exhaust outlet of compressor 1 is connected with an end of condenser 3, and the air entry of compressor 1 is connected with an end ofevaporimeter 10, and the other end of condenser 3 is connected with the other end ofevaporimeter 10 through throttle part 9.

The new wind of combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit partly links to each other with new wind air intake vent place through air-air heat reclamation device 11; Air draft partly links to each other with air draft air intake vent place through air-air heat reclamation device 11, is dehumidified by desiccant wheel behind evaporimeter through heat pump and the condenser again and regenerates.

Its operation principle is:

One, operation condition in summer

Referring to Fig. 1; Outdoor new wind passes through air-air heat reclamation device 11 andevaporimeter 10 through outdoor new wind successively successively; After being carried out preliminary full heat exchange andevaporimeter 10 precoolings dehumidifying by air-air heat reclamation device 11; Dehumidify throughdesiccant wheel 12 again and condensation heat recover 6 send into after heating up indoor, to reach required air-out humiture.The purpose of air-air heat reclamation device 11 is that preliminary full recuperation of heat is carried out in new air draft; The purpose ofevaporimeter 10 is the low dew-point temperatures through refrigerant evaporation, removes the moisture in the moist outdoor new wind of high temperature.The purpose ofdesiccant wheel 12 is with the mode of absorption type dehumidifying, removes the latent heat in the new wind, reaches required air-out water capacity.Indoor exhaust wind is passed through air-air heat reclamation device 11 and condenser 3 successively, utilizes condensation heat as reactivation heat, and to desiccantwheel 12 regeneration, outdoor airborne moisture discharge, heat pump plays a part to reduce power consumption and improves Energy Efficiency Ratio.

Two, winter operation operating mode

Referring to Fig. 2, the new wind of open-air seasoning, low temperature passes through the regenerating section of air-air heat reclamation device 11,condenser 10,desiccant wheel 12 successively, new wind be heated send into behind the humidification indoor.The heat exhaust ofcondenser 10 is used to heat new wind.Indoor hot and humid air is discharged from outdoor through the dehumidifying part of air-air heat reclamation device 11, evaporimeter 3 anddesiccant wheel 12 behind the cool-down dehumidification.First magnetic valve 8 is opened, and second magnetic valve 5 cuts out, and condensation heat recover 6 is not worked.

Three, ventilation operating mode

Heat pump quits work.Air draft exchanges with new wind, is admitted to indoorly behind the energy of new wind nature, and indoor foul atmosphere is discharged outdoor.

Claims (6)

1. this combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit is made up of air-air heat reclamation device, desiccant wheel, air draft part, new wind part and heat pump; Desiccant wheel is (12); Heat pump comprises compressor (1), four-way change-over valve (2), evaporimeter (10), condenser (3), condensation heat recover (6) and throttle part (9); The air draft part is carried out by exhaust blower (4), and new wind part is carried out by new blower fan (7).

2. combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit according to claim 1; The exhaust outlet that it is characterized in that said compressor (1) is connected with an end of condenser (3); The air entry of compressor (1) is connected with an end of evaporimeter (10), and the other end of condenser (3) is connected with the other end of evaporimeter (10) through throttle part (9).

3. combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit according to claim 2; It is characterized in that also being connected with first magnetic valve (8) between said condenser (3) and the throttle part (9); The first magnetic valve two ends are parallel with condensation heat recover (6); Wherein, the end that is connected with condenser (3) of first magnetic valve (8) be connected with condensation heat recover (6) through second magnetic valve (5); The condensation heat recover is arranged on new wind air outlet place.

4. combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit according to claim 3; It is characterized in that said condensation heat recover (6) and condenser (3) are connected in series, raise new wind leaving air temp and reduce relative humidity of the condensation heat that is used to reclaim refrigeration system; If new wind leaving air temp is low excessively, need second magnetic valve (5) is opened, first magnetic valve (8) cuts out; If new wind leaving air temp is too high, then need first magnetic valve (8) is opened, second magnetic valve (5) cuts out, and condensation heat recover (6) is not worked.

5. combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit according to claim 1; New wind partly links to each other with new wind air intake vent place through air-air heat reclamation device (11); Air draft partly links to each other with air draft air intake vent place through air-air heat reclamation device (11), is dehumidified by desiccant wheel behind evaporimeter through heat pump and the condenser again and regenerates;

Outdoor new wind passes through air-air heat reclamation device (11) and evaporimeter (10) through outdoor new wind successively successively; After being carried out preliminary full heat exchange and evaporimeter (10) precooling dehumidifying by air-air heat reclamation device (11); Pass through again that desiccant wheel (12) dehumidifies and condensation heat recover (6) send into after heating up indoor, to reach required air-out humiture; The purpose of air-air heat reclamation device (11) is that preliminary full recuperation of heat is carried out in new air draft; The purpose of evaporimeter (10) is the low dew-point temperature through refrigerant evaporation, removes the moisture in the moist outdoor new wind of high temperature; The purpose of desiccant wheel (12) is with the mode of absorption type dehumidifying, removes the latent heat in the new wind, reaches required air-out water capacity; Indoor exhaust wind is passed through air-air heat reclamation device (11) and condenser (3) successively; Utilize condensation heat as reactivation heat; To desiccant wheel (12) regeneration, outdoor airborne moisture discharge, heat pump plays a part to reduce power consumption and improves Energy Efficiency Ratio;

When the outdoor air water capacity is fit to, close compressor, air and the air from outdoor inlet chamber in outdoor from indoor discharge carry out ventilation.

6. combined heat pump type low-temp recovery rotary wheel dehumidifying full heat recovery fresh air unit according to claim 1 is characterized in that said desiccant wheel (12) is divided into dehumidifying part and regenerating section.

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