CN104266277A - Heat pipe heat recovery all fresh air dehumidification air-conditioning device - Google Patents
Heat pipe heat recovery all fresh air dehumidification air-conditioning device Download PDFInfo
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- CN104266277A CN104266277A CN201410564189.7A CN201410564189A CN104266277A CN 104266277 A CN104266277 A CN 104266277A CN 201410564189 A CN201410564189 A CN 201410564189A CN 104266277 A CN104266277 A CN 104266277A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-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
- F24F3/12—Air-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
- F24F3/14—Air-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
- F24F3/147—Air-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 both heat and humidity transfer between supplied and exhausted air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Central Air Conditioning (AREA)
Abstract
The invention discloses a heat pipe heat recovery all fresh air dehumidification air-conditioning device. The heat pipe heat recovery all fresh air dehumidification air-conditioning device is composed of heat pump devices, heat pipes, a surface air cooler, a humidifier, a fresh air channel unit and an exhaust channel unit. One set of the heat pump devices comprises a compressor, a four-way reversing valve, a condenser, an evaporator, a refrigerating fluid flow direction control device and a throttle device, wherein the refrigerating fluid flow direction control device is composed of a reservoir, a dry filter, a throttle device and four one-way valves; the other set of the heat pump devices is composed of a compressor, two electromagnetic valves, two condensers, an evaporator and a throttle device. The heat pipe heat recovery all fresh air dehumidification air-conditioning device can dehumidify and cool and humidify and heat fresh air, and by means of an efficient heat recovery device, saves energy sources and can be widely applied to places with high requirements on the fresh air.
Description
Technical field
The present invention relates to a kind of all-fresh air dehumidification air conditioner device, specifically relate to a kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device.
Background technology
China's major part air conditioning in residential buildings system adopts new return air hybrid system, and this system can be mixed by new return air, reaches the object of economize energy, by providing a certain amount of new wind, meets the air quality requirement of building interior.But for some special application building occasion, as defence engineering, deposit poisonous or harmful substance warehouse, hospital etc., adopt new return air hybrid a/c system can not meet building demand, must all fresh air air-conditioning system be adopted, and strict to the humidity requirement of new wind.
Compared with air-return dehumidifier, Novel wind-dehumidifier process be all come from outdoor high upsurge to wet new wind, air handling process load is very large, and the energy consumption of corresponding unit is very large; And a large amount of air drafts is typically piped directly to outdoor without process, the energy in air draft is not well utilized.The energy-saving and emission-reduction policy that Novel wind-dehumidifier and the country of this high energy consumption advocate deviates from mutually.Therefore, a kind of all-fresh air dehumidification air conditioner device with heat reclamation device of design invention is necessary.
A kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device of the present invention's design, heat pipe is adopted to carry out the recuperation of heat of air draft, not only can high efficiente callback air draft energy, can effectively stop new return air to mix simultaneously, prevent cross pollution, simultaneously unit inside is provided with heat pump and reclaims further air draft heat, makes energy saving of system effect more obvious.Be provided with two-stage heat pump and a surface cooler and humidifier in unit, make unit can by the selective work of two-stage heat pump and surface cooler, humidifier, meet the indoor temperature and humidity requirement under different operating mode throughout the year, of many uses.
Summary of the invention
technical problem:technical problem to be solved by this invention is to provide a kind of different working condition requirement throughout the year of can meeting, with the all-fresh air dehumidification air conditioner device of heat recovery function.
technical scheme:
A kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device, comprise new wind passage and air exhaust passage, it is characterized in that: also comprise a heat pipe thermal recovery unit, first order heat pump compressor, second level heat pump compressor, four-way change-over valve, refrigerant flow direction controls and throttling arrangement, first order heat pump gas-liquid separator, first magnetic valve, reheater condenser again, device for drying and filtering, expansion valve, second level heat pump gas-liquid separator and the second magnetic valve, this heat pipe thermal recovery unit comprises air exhaust passage end and new wind tunnel ends, described air exhaust passage end is positioned at described air exhaust passage, described new wind tunnel ends is positioned at described new wind passage, the first air heat exchanger is also provided with in described air exhaust passage, condenser and exhaust fan, also surface cooler is provided with in described new wind passage, second air heat exchanger, evaporimeter, humidifier and new wind blower fan,
Described first order heat pump compressor, four-way change-over valve, the first air heat exchanger, refrigerant flow direction control and are connected to form first order heat pump between throttling arrangement, the second air heat exchanger and first order heat pump gas-liquid separator; Wherein refrigerant flow direction controls to comprise the first check valve, the second check valve, the 3rd check valve, the 4th check valve, reservoir, device for drying and filtering and expansion valve with throttling arrangement; The gas outlet of first order heat pump compressor is connected with the air inlet a of four-way change-over valve, a gas outlet c of four-way change-over valve is connected with the first air heat exchanger, the other end of the first air heat exchanger controls with refrigerant flow direction and the first check valve in throttling arrangement is connected, the first described check valve is in parallel with the 4th check valve, second check valve is in parallel with the 3rd check valve, and being linked in sequence successively between the first check valve, the 3rd check valve and the second check valve, the 4th check valve arranges described reservoir, device for drying and filtering and expansion valve; The outlet of the second check valve is connected with the second air heat exchanger, the second air heat exchanger other end is connected with the air inlet b of four-way change-over valve, the gas outlet d of four-way change-over valve is connected with gas-liquid separator, and the outlet side of gas-liquid separator is connected with the air inlet of first order heat pump compressor;
Described second level heat pump compressor, condenser, first magnetic valve, reheater condenser again, device for drying and filtering, expansion valve, evaporimeter, second level heat pump is connected to form between second level heat pump gas-liquid separator and the second magnetic valve, the gas outlet of second level heat pump compressor is connected with condenser, condensator outlet connects the first magnetic valve and the second magnetic valve, the other end of the first magnetic valve is connected with reheating condenser inlet, the outlet of reheater condenser connects device for drying and filtering again, device for drying and filtering is connected with expansion valve again, the expansion valve other end connects the entrance of evaporimeter, the outlet of evaporimeter is connected with gas-liquid separator, the outlet side of gas-liquid separator is connected with the air inlet of second level heat pump compressor.
Described heat pipe thermal recovery unit comprises the heat-transfer working medium in fin, base tube, turning cylinder and base tube, described fin is arranged on the two ends of described base tube, described turning cylinder is arranged on the middle part of described base tube, described base tube can rotate around second(-)motion shaft, adjust new wind tunnel ends and air exhaust passage end height, described turning cylinder surrounding is provided with location and prevents the dividing plate of air cross.
Before described first air heat exchanger, condenser are positioned at air exhaust passage heat pipe thermal recovery unit successively; After described surface cooler, the second air heat exchanger, evaporimeter, again reheater condenser, humidifier are positioned at new wind passage recuperation of heat runner successively.Air exhaust passage is provided with exhaust fan, before being positioned at the first air heat exchanger; New wind passage is provided with breeze fan, after being positioned at humidifier.
Described first order heat pump expansion valve and second level heat pump expansion valve use heating power expansion valve, electric expansion valve, capillary or hand expansion valve.
Surface cooler adopts fin-tube type heat exchanger, and communicate with the water chiller-heater unit of outside, can lead to hot water or cold water, water temperature can set as required, also can increase according to load or reduce surface cooler.Described humidifier can adopt wet-membrane humidifier, but is not limited to this form.
New wind passage and air exhaust passage are arranged side by side, new wind passage and air exhaust passage completely isolated, prevent cross pollution.Heat pipe thermal recovery unit two ends are placed in new wind passage and air exhaust passage respectively, and heat pipe thermal recovery unit can slightly rotate the new wind channel side of adjustment and air exhaust passage side heat pipe end height around jackshaft.
beneficial effect:
1. the present invention adopts heat pipe to carry out recuperation of heat, mixing of indoor exhaust wind and new wind can be avoided, arrange evaporimeter and the condenser of two-stage heat pump cleverly simultaneously, the step realizing air draft energy is recycled, reduce the energy consumption for cooling of the new wind of summer condition and the thermal energy consumption again of the rear air of dehumidifying, reduce the new wind heating energy consumption of winter condition;
2. the present invention arranges two-stage heat pump, is also provided with surface cooler and humidifier in new wind passage, even if summer, operating mode was severe, also can reaches the object of degree of depth dehumidifying, can regulate the blasting humidity of new wind winter, be applicable to each operating mode throughout the year.
3. compact conformation of the present invention, application places is extensive.
Accompanying drawing explanation
Fig. 1 is systematic schematic diagram of the present invention.
Fig. 2 is unit plan structure schematic diagram of the present invention.
Fig. 3 is heat pipe thermal recovery unit structural representation in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
See Fig. 1, the present invention is controlled to form first order heat pump with throttling arrangement, the second air heat exchanger 9, first order heat pump gas-liquid separator 10 by first order heat pump compressor 1, four-way change-over valve 2, first air heat exchanger 3, refrigerant flow direction; Wherein refrigerant flow direction controls to comprise the first check valve 4, second check valve 8, the 3rd check valve 11, the 4th check valve 12, reservoir 5, device for drying and filtering 6, expansion valve 7 with throttling arrangement.Second level heat pump is formed by second level heat pump compressor 13, condenser 14, first magnetic valve 15, reheating condenser 16, device for drying and filtering 17, expansion valve 18, evaporimeter 19, second level heat pump gas-liquid separator 20, second magnetic valve 21.
New wind passage and air exhaust passage are arranged side by side, new wind passage and air exhaust passage completely isolated, prevent cross pollution.Heat pipe thermal recovery unit two ends are placed in new wind passage and air exhaust passage respectively, and heat pipe thermal recovery unit comprises the heat-transfer working medium in fin, base tube, turning cylinder, dividing plate and pipe.Heat pipe thermal recovery unit can rotate around second(-)motion shaft, adjusts new wind channel side and air exhaust passage side heat pipe end height, and turning cylinder surrounding is provided with location and prevents the dividing plate of air cross.
Before first air heat exchanger 3, condenser 14 are positioned at air exhaust passage heat pipe thermal recovery unit successively; After described surface cooler 23, second air heat exchanger 9, evaporimeter 19, reheating condenser 16, humidifier 24 are positioned at new wind passage heat pipe thermal recovery unit successively.Air exhaust passage is provided with exhaust fan 26, before being positioned at the first air heat exchanger 3; New wind passage is provided with breeze fan 25, after being positioned at humidifier 24.
First order heat pump refrigerant flow direction controls to be formed by connecting in opposite directions primarily of four check valves with throttling arrangement, is provided with reservoir 5, device for drying and filtering 6 and expansion valve 7 in centre successively.First order heat pump expansion valve 7 and second level heat pump expansion valve 18 can use heating power expansion valve, electric expansion valve, capillary or hand expansion valve.
Surface cooler 23 adopts fin-tube type heat exchanger, communicates with the water chiller-heater unit of outside, can lead to hot water or cold water, and water temperature can set as required, also can increase according to load or reduce surface cooler.Described humidifier 24 can adopt wet-membrane humidifier, but is not limited to this form.
One, summer condition (refrigeration mode) operational process
As shown in Figure 1, when the present invention works in summer condition, outdoor air is hot and humid air, regulate heat pipe thermal recovery unit 22, its moving axis 29 that rotates is rotated, make dividing plate 30a and the new wind passage of c close contact and air exhaust passage central dividing plate, prevent new wind from mixing with air draft, now make heat pipe air exhaust passage end height higher than new wind tunnel ends.Open the first order and second level heat pump compressor 1,13, pass into cold water in surface cooler 23, a, c interface of first order heat pump four way reversing valve 2 communicates, and b, d interface communicates, and now, the first air heat exchanger 3 is condenser, and the second air heat exchanger 9 is evaporimeter.The air wind pushing temperature regulated as required, the first magnetic valve 15 of second level heat pump and the second magnetic valve 21 are optionally opened one of them or both open.Outdoor new wind now uses as evaporimeter through heat pipe thermal recovery unit 22, surface cooler 23, second air heat exchanger 9(successively in new wind passage), evaporimeter 18, reheating condenser 16 and humidifier 24; In air exhaust passage, indoor exhaust wind now uses as condenser through heat pipe thermal recovery unit 22, condenser 14 and the first air heat exchanger 3(successively).
Outdoor new wind carries out heat exchange through heat pipe thermal recovery unit 22 and indoor exhaust wind, temperature decreases, through surface cooler 23, temperature reduces further, then through the second air heat exchanger 9, cool-down dehumidification, through evaporator 19, thoroughly arrive the object of dehumidifying, then through reheating condenser 16, improve wind pushing temperature, the humiture of air-supply can be met the demands.Indoor exhaust wind through heat pipe thermal recovery unit 22 recovery section energy, then through condenser 14 and the first air heat exchanger 3, recovers energy further.
If summer condition outdoor temperature humidity is more suitable, also only unlatching first order heat pump or the second level heat pump object of dehumidifying just can be reached.
Two, winter condition (heating mode) operational process
When the present invention works in winter condition, outdoor air is low temperature dry air, regulate heat pipe thermal recovery unit 22, its moving axis 29 that rotates is rotated, make dividing plate 30b and the new wind passage of d close contact and air exhaust passage central dividing plate, prevent new wind from mixing with air draft, now make heat pipe new wind tunnel ends height higher than air exhaust passage end.Open first order heat pump compressor 1, pass into hot water in surface cooler 23, a, b interface of first order heat pump four way reversing valve 2 communicates, and c, d interface communicates, and now, the first air heat exchanger 3 is evaporimeter, and the second air heat exchanger 9 is condenser.Outdoor new wind now uses as condenser through heat pipe thermal recovery unit 22, surface cooler 23, second air heat exchanger 9(successively in new wind passage), humidifier 24; In air exhaust passage, indoor exhaust wind now uses as evaporimeter through heat pipe thermal recovery unit 22, first air heat exchanger 3(successively).
Outdoor new wind carries out heat exchange through heat pipe thermal recovery unit 22 and indoor exhaust wind, and temperature increases, through surface cooler 23, temperature raises further, then through the second air heat exchanger 9, reaches higher temperature, then by humidifier 24, equal-enthalpy humidifying, reaches desirable air-supply humiture.Indoor exhaust wind through heat pipe thermal recovery unit 22 recovery section energy, then through the first air heat exchanger 3, recovers energy further.
Three, transition season operating mode operational process
When the present invention works in transition season operating mode, outside air temperature is suitable for, if outside air humidity is larger, then open the first order and second level heat pump compressor 1,13, do not supply water in surface cooler 23, a, c interface of first order heat pump four way reversing valve 2 communicates, b, d interface communicates, now, the first air heat exchanger 3 is condenser, and the second air heat exchanger 9 is evaporimeter.The air wind pushing temperature regulated as required, the first magnetic valve 15 of second level heat pump and the second magnetic valve 21 are optionally opened.Outdoor new wind now uses as evaporimeter through heat pipe thermal recovery unit 22, second air heat exchanger 9(successively in new wind passage), evaporimeter 18, reheating condenser 16 and humidifier 24; In air exhaust passage, indoor exhaust wind now uses as condenser through heat pipe thermal recovery unit 22, condenser 14 and the first air heat exchanger 3(successively).
Outdoor new wind is through the second air heat exchanger 9, and temperature reduces, then through evaporator 19 cool-down dehumidification, then through reheating condenser 16, suitably improves wind pushing temperature, and the humiture of air-supply is all met the demands.Indoor exhaust wind, through condenser 14, recovers energy, then through the first air heat exchanger 3, recovers energy further.
If when the temperature and humidity of outdoor air is all suitable for, the first order and second level heat pump compressor 1,13 are all closed, do not supply water in surface cooler 23, only new wind blower fan 25 and exhaust fan 26 run, and the new wind of the air of discharging indoor and outdoor is merely through heat pipe thermal recovery unit 22 heat exchange.
If outside air temperature is suitable for, humidity is lower, then the first order and second level heat pump compressor 1,13 are all closed, and do not supply water in surface cooler 23, humidifier 24 works, and makes outdoor new wind reach suitable humiture.
Claims (5)
1. a heat pipe heat recovery total-fresh wind dehumidification air conditioner device, comprises new wind passage and air exhaust passage, it is characterized in that: also comprise a heat pipe thermal recovery unit (22), first order heat pump compressor (1), second level heat pump compressor (13), four-way change-over valve (2), refrigerant flow direction controls and throttling arrangement, first order heat pump gas-liquid separator (10), first magnetic valve (15), reheater condenser (16) again, device for drying and filtering (17), expansion valve (18), second level heat pump gas-liquid separator (20) and the second magnetic valve (21), this heat pipe thermal recovery unit (22) comprises air exhaust passage end (221) and new wind tunnel ends (222), described air exhaust passage end (221) is positioned at described air exhaust passage, described new wind tunnel ends (222) is positioned at described new wind passage, is also provided with the first air heat exchanger (3) in described air exhaust passage, condenser (14) and exhaust fan (26), be also provided with surface cooler (23) in described new wind passage, second air heat exchanger (9), evaporimeter (19), humidifier (24) and new wind blower fan (25),
Described first order heat pump compressor (1), four-way change-over valve (2), the first air heat exchanger (3), refrigerant flow direction control and are connected to form first order heat pump between throttling arrangement, the second air heat exchanger (9) and first order heat pump gas-liquid separator (10), wherein refrigerant flow direction controls to comprise the first check valve (4), the second check valve (8), the 3rd check valve (11), the 4th check valve (12), reservoir (5), device for drying and filtering (6) and expansion valve (7) with throttling arrangement, the gas outlet of first order heat pump compressor (1) is connected with the air inlet a of four-way change-over valve (2), a gas outlet c of four-way change-over valve (2) is connected with the first air heat exchanger (3), the other end of the first air heat exchanger (3) controls with refrigerant flow direction and the first check valve (4) in throttling arrangement is connected, described the first check valve (4) is in parallel with the 4th check valve (12), second check valve (8) is in parallel with the 3rd check valve (11), in the first check valve (4), 3rd check valve (11) and the second check valve (8), be linked in sequence successively between 4th check valve (12) and described reservoir (5) is set, device for drying and filtering (6) and expansion valve (7), the outlet of the second check valve (8) is connected with the second air heat exchanger (9), second air heat exchanger (9) other end is connected with the air inlet b of four-way change-over valve (2), the gas outlet d of four-way change-over valve is connected with gas-liquid separator (10), and the outlet side of gas-liquid separator (10) is connected with the air inlet of first order heat pump compressor (1),
Described second level heat pump compressor (13), condenser (14), first magnetic valve (15), reheater condenser (16) again, device for drying and filtering (17), expansion valve (18), evaporimeter (19), second level heat pump is connected to form between second level heat pump gas-liquid separator (20) and the second magnetic valve (21), the gas outlet of second level heat pump compressor (13) is connected with condenser (14), condenser (14) outlet connection first magnetic valve (15) and the second magnetic valve (21), the other end of the first magnetic valve (15) is connected with reheater condenser (16) entrance again, the outlet of reheater condenser (16) connects device for drying and filtering (17) again, device for drying and filtering (17) is connected with expansion valve (18) again, expansion valve (18) other end connects the entrance of evaporimeter (19), the outlet of evaporimeter (19) is connected with gas-liquid separator (20), the outlet side of gas-liquid separator (20) is connected with the air inlet of second level heat pump compressor (13).
2. a kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device according to claims 1, it is characterized in that: described heat pipe thermal recovery unit (22) comprises fin (27), base tube (28), heat-transfer working medium in turning cylinder (29) and base tube, described fin is arranged on the two ends of described base tube, described turning cylinder is arranged on the middle part of described base tube (28), described base tube (28) can rotate around second(-)motion shaft (29), adjust new wind tunnel ends and air exhaust passage end height, described turning cylinder (29) surrounding is provided with location and prevents the dividing plate (30) of air cross.
3. a kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device according to claims 1, is characterized in that: before described first air heat exchanger (3), condenser (14) are positioned at air exhaust passage heat pipe thermal recovery unit (22) successively; After described surface cooler (23), the second air heat exchanger (9), evaporimeter (19), again reheater condenser (16), humidifier (24) are positioned at new wind passage heat pipe thermal recovery unit (22) successively.
4. a kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device according to claims 1, is characterized in that: described first order heat pump expansion valve (7) and second level heat pump expansion valve (18) use heating power expansion valve, electric expansion valve, capillary or hand expansion valve.
5. a kind of heat pipe heat recovery total-fresh wind dehumidification air conditioner device according to claims 1, is characterized in that: described surface cooler (23) is fin-tube type heat exchanger, logical hot water or cold water; Described humidifier (24) is wet-membrane humidifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410564189.7A CN104266277A (en) | 2014-10-21 | 2014-10-21 | Heat pipe heat recovery all fresh air dehumidification air-conditioning device |
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| CN201410564189.7A CN104266277A (en) | 2014-10-21 | 2014-10-21 | Heat pipe heat recovery all fresh air dehumidification air-conditioning device |
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