CN109539413A - Air-conditioning system - Google Patents

Air-conditioning system Download PDF

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Publication number
CN109539413A
CN109539413A CN201811433856.2A CN201811433856A CN109539413A CN 109539413 A CN109539413 A CN 109539413A CN 201811433856 A CN201811433856 A CN 201811433856A CN 109539413 A CN109539413 A CN 109539413A
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CN
China
Prior art keywords
air
conditioning system
condenser
evaporator
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811433856.2A
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Chinese (zh)
Inventor
褚伟鹏
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BEIJING INSTITUTE OF WATER
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BEIJING INSTITUTE OF WATER
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Publication date
Application filed by BEIJING INSTITUTE OF WATER filed Critical BEIJING INSTITUTE OF WATER
Priority to CN201811433856.2A priority Critical patent/CN109539413A/en
Publication of CN109539413A publication Critical patent/CN109539413A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/40Fluid line arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00Compression machines, plants or systems, with several condenser circuits
    • F25B6/02Compression machines, plants or systems, with several condenser circuits arranged in parallel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present invention relates to air-conditioning technical fields, disclose a kind of air-conditioning system, the air-conditioning system includes indoor unit and outdoor unit, the outdoor unit includes the first condenser, the indoor unit includes having the shell of indoor air inlet and air outlet and the evaporator for capableing of cooling air set gradually in the shell along the direction of the indoor air inlet and the air outlet and the second condenser that can heat the air after cooling, the air-conditioning system further includes compressor, wherein: the compressor, first condenser, the evaporator is in turn connected to form the first refrigerant circulation loop by the pipeline for being loaded with refrigerant;The compressor, second condenser, the evaporator are in turn connected to form second refrigerant circulation loop by the pipeline for being loaded with the refrigerant.Air-conditioning system provided by the invention can be improved unit efficiency, reduce units consumption.

Description

Air-conditioning system
Technical field
The present invention relates to air-conditioning technical fields, more particularly to a kind of air-conditioning system.
Background technique
The air handling scheme of high-precision constant-temperature constant-moisture air conditioner mostly uses greatly dew-point temperature control mode.Wherein, dew point Temperature refers to air under the conditions of moisture content and all immovable air pressure, is cooled to temperature when saturation.It figuratively, is exactly empty Temperature when vapor in gas becomes dewdrop is dew-point temperature.This dew-point temperature control mode first dehumidifies air cooling-down Air after cooling is heated using the method for reheating (also known as reheating) again afterwards, causes to consume a large amount of energy.
Summary of the invention
The purpose of the invention is to provide a kind of air-conditioning system, which can be improved unit efficiency, reduce machine Group energy consumption.
To achieve the goals above, the present invention provides a kind of air-conditioning system, and the air-conditioning system includes indoor unit and outdoor Machine, the outdoor unit include the first condenser, and the indoor unit includes having the shell of indoor air inlet and air outlet and in institute State the evaporator and energy for capableing of cooling air set gradually in shell along the direction of the indoor air inlet and the air outlet The second condenser of the air after cooling is enough heated, the air-conditioning system further includes compressor, in which: the compressor, First condenser, the evaporator are in turn connected to form the first refrigerant circulation loop by the pipeline for being loaded with refrigerant;Institute It states compressor, second condenser, the evaporator and the second refrigeration is in turn connected to form by the pipeline for being loaded with the refrigerant Agent circulation loop.
Preferably, the first branch and second are connected between the exhaust outlet of the compressor and the import of the evaporator Road, first condenser are arranged in the first branch, and second condenser is arranged in the second branch, described The outlet of evaporator and the air entry of the compressor pass through piping connection.
Preferably, the air-conditioning system includes that outlet and the institute of first condenser are set in the first branch State the first throttling device between the import of evaporator;And/or the air-conditioning system is included in the second branch and is set to Second throttling device between the outlet of second condenser and the import of the evaporator.
Preferably, the air-conditioning system includes being arranged in the shell positioned at second condenser and the air outlet Between heating device.
Preferably, before the air-conditioning system includes control device and is able to detect the intracorporal evaporator of the shell, institute The detection device of the thermal parameter of air after stating evaporator, after second condenser, after the heating device, the control The thermal parameter that device is configured to the air detected according to the detection device adjusts the refrigerating capacity of the evaporator, institute The heating amount of the second condenser, the heating amount of the heating device are stated, so that the thermal parameter of the air of the air outlet is to set Definite value.
Preferably, the air-conditioning system includes being arranged in the shell positioned at the indoor air inlet and the evaporator Between filter device.
Preferably, the air-conditioning system include be arranged in the shell make air from the indoor air inlet described in The ventilation device of air outlet flowing.
Preferably, the outdoor air inlet for being connected to outdoor air, the outdoor air inlet position are provided on the shell In the side away from the air outlet of the evaporator.
In the above-mentioned technical solutions, since indoor unit includes shell and setting in the intracorporal evaporator of shell and the second condensation Device, the gaseous state condenser cooling after the second condenser will pressurize from compressor condense the heat discharged when forming liquid refrigerant It can be used for heating the air cooling through evaporator, i.e. the heat of the second condenser release can replace part heating cooling through evaporator Heat needed for air afterwards, so that energy consumption is reduced, simultaneously because air system is provided with the second condenser, and second Condenser is in the lower temperature of evaporator cooling air, improves cooling operating condition, make the working efficiency of the second condenser compared with Height, to improve the whole work efficiency of air-conditioning system.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the air-conditioning system of the preferred embodiment for the present invention;
Fig. 2 is the psychrometric chart of the air handling process of the air-conditioning system of the preferred embodiment for the present invention.
Description of symbols
First condenser -1;Shell -2;Indoor air inlet-A1;Outdoor air inlet-A2;Air outlet-B;Evaporator -3;The Two condensers -4;Compressor -5;First throttling device-C1;Second throttling device-C2;Heating device -6;Filter device -7;It is logical Wind apparatus -8.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to With reference to upper and lower, left and right shown in the drawings;" inside and outside " refers to inside and outside the profile relative to each component itself.
The present invention provides a kind of air-conditioning system, and the air-conditioning system includes indoor unit and outdoor unit, and the outdoor unit includes First condenser 1, the indoor unit include having the shell 2 of indoor air inlet A1 and air outlet B and in the shell 2 along institute State the evaporator 3 for capableing of cooling air and can heat cold that the direction of the indoor air inlet A1 and air outlet B is set gradually Second condenser 4 of the air after but, the air-conditioning system further include compressor 5, in which: the compressor 5, described One condenser 1, the evaporator 3 are in turn connected to form the first refrigerant circulation loop by the pipeline for being loaded with refrigerant;The pressure Contracting machine 5, second condenser 4, the evaporator 3 are in turn connected to form second refrigerant by the pipeline for being loaded with the refrigerant Circulation loop.
In the above-mentioned technical solutions, as shown in Figure 1, since indoor unit includes shell 2 and the evaporation that is arranged in shell 2 Gaseous state condenser cooling condensation after the pressurization of compressor 5 is formed liquid system by device 3 and the second condenser 4, the second condenser 4 The heat discharged when cryogen can be used for heating the air cooling through evaporator 3, i.e. the heat of the second condenser 4 release can replace portion Divide heating through heat needed for the air after cooling of evaporator 3, so that energy consumption is reduced, simultaneously because air system is arranged Second condenser 4, and the second condenser 4 is in the lower temperature of 3 cooling air of evaporator, improve cooling operating condition, make The working efficiency of second condenser 4 is higher, to improve the whole work efficiency of air-conditioning system.
Wherein, in order to make compressor 5, the first condenser 1, form the first refrigerant circulation loop between evaporator 3 and make Compressor 5, the second condenser 4 form second refrigerant circulation loop between evaporator 3, at the same can simplify pipeline structure and Material consumption is reduced, as illustrated in fig. 1, it is preferred that connecting between the exhaust outlet of the compressor 5 and the import of the evaporator 3 There are the first branch and second branch, first condenser 1 is arranged in the first branch, and second condenser 4 is arranged In the second branch, the outlet of the evaporator 3 and the air entry of the compressor 5 pass through piping connection.That is, First refrigerant circulation loop and the second refrigerant circulation loop are between the evaporator 3 and the compressor 5 Share same pipeline.
In order to adjust the amount of refrigerant of the control from the first condenser 1 into evaporator 3, it is preferable that the air-conditioning System includes between the import of outlet and the evaporator 3 for being set to first condenser 1 in the first branch First throttling device C1;In order to adjust the amount of refrigerant of the control from the second condenser 4 into evaporator 3, the air-conditioning System includes between the import of outlet and the evaporator 3 for being set to second condenser 4 in the second branch Second throttling device C2.
In view of the temperature of the hot-air again by the heating of the second condenser 4 is likely lower than required set temperature, in order to Guarantee from the temperature of the air outlet B air being discharged to be set temperature, it is preferable that the air-conditioning system includes setting in the shell 2 The heating device 6 between second condenser 4 and the air outlet B set.
Also, in order to realize the accurate temperature adjusted from the air outlet B air being discharged, preferably to meet requirement With reduce energy consumption, it is preferable that the air-conditioning system includes control device and the evaporator 3 that is able to detect in the shell 2 Before, the detection device of the thermal parameter of air after the evaporator 3, after second condenser 4, after the heating device 6, The thermal parameter that the control device is configured to the air detected according to the detection device adjusts the evaporator 3 Refrigerating capacity, the heating amount of second condenser 4, the heating amount of the heating device 6, so that the air of the air outlet B Thermal parameter is setting value.Wherein, when detection device detects that the thermal parameter of the air after the heating of the second condenser 4 is to set When definite value, heating device 6 does not work;When detection device detects that the thermal parameter of the air after the heating of the second condenser 4 is low When setting value, control device controls heating device 6 and heats air, so that the thermal parameter of air is equal to setting value.It needs to illustrate , " preceding " and " rear " here is distinguished according to the flow direction of air, for example, air first flows process " evaporator 3 Before " reached " after the evaporator 3 " again.
The substances such as dust are deposited on evaporator 3 and influence the working efficiency of evaporator 3 and in order to improve sky in order to prevent Makings amount, it is preferable that the air-conditioning system includes being arranged in the shell 2 positioned at the indoor air inlet A1 and the evaporation Filter device 7 between device 3.Enter in shell 2 from indoor air inlet A1 and the outdoor air inlet A2 being explained below in this way Air can first pass through filter device 7, and the substances such as dust are filtered out, and then using evaporator 3, keep evaporator 3 more preferable Ground work.
In order to accelerate the flowing velocity of air, to improve the working efficiency of air-conditioning system, it is preferable that the air-conditioning system packet Include the ventilation device 8 for flowing air from the indoor air inlet A1 towards the air outlet B being arranged in the shell 2.Its In, ventilation device 8 can be blower.
In the work for not influencing the other elements (such as filter device 7, evaporator 3 and second condenser 4 etc.) in shell 2 Under the premise of, ventilation device 8 may be provided at any suitable position in shell 2, in order to enable the air in shell 2 as early as possible It is discharged from air outlet B, and can be flowed in indoor larger range space after air outlet B discharge, it is preferable that is described The downstream of the heating device 6 is arranged in ventilation device 8;The outlet of ventilation device 8 extends to the air outlet B.
In addition, in order to improve the quality of indoor air, it is preferable that be provided on the shell 2 for communication chamber outer space The outdoor air inlet A2, the outdoor air inlet A2 of gas are located at the side away from the air outlet B of the evaporator 3.In this way The room air entered in shell 2 through indoor air inlet A1 and the outdoor air entered in shell 2 through outdoor air inlet A2 mix After can first pass through 3 cool-down dehumidification of evaporator together after, using the second condenser 4 heat, if the thermal technology of mixing air at this time Parameter, which is not up to setting value also and may be heated device 6, is heated to setting value, is sent into finally by ventilation device 8 by air outlet B It is indoor.
Wherein, filter device 7, evaporator 3, the second condenser 4 and ventilation device 8 etc. are set in shell 2 for convenience Device and make to enter the outdoor in shell 2 from the indoor air inlet A1 room air entered in shell 2 and from outdoor air inlet A2 The mixed gas of air can successively pass through the devices such as filter device 7, evaporator 3, the second condenser 4 and ventilation device 8, preferably Ground, the shell 2 are cuboid, and the relative spacing of the cuboid is arranged in the indoor air inlet A1 and the air outlet B On the end wall at the both ends of setting, the side wall of the cuboid is arranged in close to the indoor air inlet A1 by the outdoor air inlet A2 On.
With reference to Fig. 1, the operational process of air-conditioning system of the invention is as follows:
Multiple arrows in Fig. 1 show the glide path of refrigerant, and specifically, compressor 5 is run, by gaseous refrigerant Pressurization, the refrigerant after pressurization are delivered to the first condenser 1 and the second condenser 4 from the exhaust outlet of compressor 5 respectively;Gaseous state system After cryogen enters the first condenser 1, cooling condensation forms liquid refrigerant, by the refrigerant of the first condenser 1 through first segment Enter evaporator 3 after flowing device C1 throttling;After gaseous refrigerant enters the second condenser 4, cooling condensation forms liquid refrigerant, Enter evaporator 3 after second throttling device C2 throttling by the refrigerant of the second condenser 4;Refrigerant enters in evaporator 3 Heat exchange, evaporation form gaseous refrigerant, and the gaseous refrigerant in evaporator 3 is inhaled into compressor 5, form refrigerant circulation.
Ventilation device 8 is run, and room air is from the shell 2 that indoor air inlet A1 enters the room machine, and outdoor air is from room External air inlet port A2 enters shell 2, and room air mixes in shell 2 with outdoor air, and mixing air is filtered through filter device 7, Filtered air is cooling through evaporator 3, and processing to air dew point temperature dehumidifies, and air after cooling is through the second condensation Device 4 heats, and the thermal parameter of air rises to less than or equal to setting value;The thermal technology of air after the heating of the second condenser 4 If parameter is lower than setting value, opens heating device 6 and heat again;The thermal parameter of air after the heating of the second condenser 4 If being equal to setting value, heating device 6 does not start;The air for flowing through heating device 6 pressurizes through ventilation device 8, by air outlet B It sends out.Wherein, first throttling device C1 and second throttling device C2 can be adjusted respectively according to operating condition flows through the first condenser 1 and The refrigerant flow of two condensers 4.
Air handling process is as follows: after room air and outdoor air mixing, successively through 3 cool-down dehumidification of evaporator, through the The heating of two condensers 4 is discharged after carrying out accurate adjustment thermal parameter alternatively through the heating of heating device 6 from air outlet B.
Fig. 2 is the psychrometric chart of the air handling process of the air-conditioning system of the preferred embodiment for the present invention, in psychrometric chart, W Point indicates that outdoor air conditions point, N point indicate that indoor air conditions point, C point indicate mixed air state point, and L point indicates Dew point of the mixing air after 3 cooling and dehumidifying of evaporator, H point indicate the air state point after 4 reheating of the second condenser, H ' table Air state point after showing 6 reheating of heating device.
For convenience of the energy-saving effect for describing air-conditioning system of the invention, it is assumed that as follows: outside air temperature is 33.5 DEG C, phase To humidity 57.7%;24 DEG C of indoor air temperature, relative humidity 50%;22 DEG C of wind pushing air temperature, relative humidity 50%;It is outdoor Air (fresh air) amount is the 10% of air output;Air output is 10000m3/ h uses the COP of unit process of refrigerastion of the present invention for 3.7 (due to increasing the second condenser 4, and the condensation temperature of the second condenser 4 is lower, therefore COP increases), using conventional power unit system The COP of cold process is 3.5, and heating device 6 uses Electric heating;Under this operating condition, indoor refrigeration duty is 7.063kW, and fresh air is negative Lotus is 10.810kW.
The process of refrigerastion that can be seen that unit from the air-treatment psychrometric chart of Fig. 2 need to be by air from mixed air shape State point C is handled to dew point L, this process, and the refrigerating capacity of unit is 42.109kW;The reheating process of unit need to be by air from dew point L Processing to H ', this process, the heat again of unit is 24.236kW;And under this operating condition, indoor refrigeration duty is only 7.063kW, newly Wind load is only 10.810kW.
Conventional power unit is such as used, power needed for producing 42.109kW cooling capacity is 12.031kW, produces 24.236kW heat institute Needing power is 24.236kW (electric heating conversion ratio takes ideal value 100%), and power needed for conventional power unit is 12.031kW+24.236kW =36.267kW.
Air-conditioning system of the invention is such as used, power needed for producing 42.109kW cooling capacity is 11.381kW, production 24.236kW heat is by 6 shared of the second condenser 4 and heating device, wherein the second condenser 4 undertakes institute's calorific requirement 90%, and do not increase additional power consumption;Heating device 6 undertakes the 10% of institute's calorific requirement, about 2.424kW;Needed for unit Power is 11.381kW+2.424kW=13.805kW.
It can be seen that air-conditioning system of the invention compared with conventional power unit, saves energy consumption about (36.267kW- 13.805kW)/36.267kW=61.94%.
In conclusion air-conditioning system of the invention is suitable for high-precision constant-temperature constant-moisture air handling system, energy-saving principle has Following two: (1) using the heat of the second condenser 4 release instead of heat needed for the reheating of part;(2) second condensers 4 Using by the cooling of the air after cooling of evaporator 6, condensation temperature is lower, improves cooling condition.Therefore, air-conditioning system of the invention System, improves the efficiency of unit, reduces units consumption, realize energy-efficient purpose.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this , can be with various simple variants of the technical solution of the present invention are made in the range of the technology design of invention, including each particular technique Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways No further explanation will be given.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention Protection scope.

Claims (8)

1. a kind of air-conditioning system, which is characterized in that the air-conditioning system includes indoor unit and outdoor unit, and the outdoor unit includes the One condenser (1), the indoor unit include having the shell (2) of indoor air inlet (A1) and air outlet (B) and in the shell (2) evaporator for capableing of cooling air set gradually in along the direction of the indoor air inlet (A1) and the air outlet (B) (3) and the second condenser (4) of the air after cooling can be heated, the air-conditioning system further includes compressor (5), In:
The compressor (5), first condenser (1), the evaporator (3) are sequentially connected shape by the pipeline for being loaded with refrigerant At the first refrigerant circulation loop;
The compressor (5), second condenser (4), the evaporator (3) are successively connected by the pipeline for being loaded with the refrigerant It connects to form second refrigerant circulation loop.
2. air-conditioning system according to claim 1, which is characterized in that the outlet of the compressor (5) and the evaporation The first branch and second branch are connected between the import of device (3), first condenser (1) is arranged in the first branch In, second condenser (4) is arranged in the second branch, outlet and the compressor (5) of the evaporator (3) Air entry passes through piping connection.
3. air-conditioning system according to claim 2, it is characterised in that:
The air-conditioning system includes the outlet that first condenser (1) is set in the first branch and the evaporator (3) first throttling device (C1) between import;And/or
The air-conditioning system includes the outlet that second condenser (4) is set in the second branch and the evaporator (3) second throttling device (C2) between import.
4. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system includes setting in the shell (2) The heating device (6) between second condenser (4) and the air outlet (B) set.
5. air-conditioning system according to claim 4, which is characterized in that the air-conditioning system includes control device and can examine Before surveying the evaporator (3) in the shell (2), the evaporator (3) afterwards, second condenser (4) afterwards, the heating The detection device of the thermal parameter of air after device (6), the control device are configured to be examined according to the detection device The thermal parameter of the air measured adjusts the refrigerating capacity of the evaporator (3), the heating amount of second condenser (4), described The heating amount of heating device (6), so that the thermal parameter of the air of the air outlet (B) is setting value.
6. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system includes setting in the shell (2) The filter device (7) between the indoor air inlet (A1) and the evaporator (3) set.
7. air-conditioning system according to claim 4, which is characterized in that the air-conditioning system includes setting in the shell (2) The ventilation device (8) for flowing air from the indoor air inlet (A1) towards the air outlet (B) set.
8. air-conditioning system described in any one of -7 according to claim 1, which is characterized in that be arranged on the shell (2) useful In the outdoor air inlet (A2) of connection outdoor air, it is described that the outdoor air inlet (A2) is located at deviating from for the evaporator (3) The side of air outlet (B).
CN201811433856.2A 2018-11-28 2018-11-28 Air-conditioning system Pending CN109539413A (en)

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CN110749018A (en) * 2019-09-12 2020-02-04 湖南工程学院 Single-machine two-stage compression middle air exhaust heat recovery fresh air processing device

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CN202254135U (en) * 2011-08-22 2012-05-30 珠海铨高机电设备有限公司 Dehumidifying and reheating device of air conditioner
CN203605337U (en) * 2013-12-02 2014-05-21 南京五洲制冷集团有限公司 Condensation heat recovery energy-saving type roof air conditioner unit
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