CN102003833A - Transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat - Google Patents

Transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat Download PDF

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Publication number
CN102003833A
CN102003833A CN2010105217098A CN201010521709A CN102003833A CN 102003833 A CN102003833 A CN 102003833A CN 2010105217098 A CN2010105217098 A CN 2010105217098A CN 201010521709 A CN201010521709 A CN 201010521709A CN 102003833 A CN102003833 A CN 102003833A
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China
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mouthfuls
valve
water
finned tube
heat exchanger
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CN2010105217098A
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CN102003833B (en
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谢英柏
刘建林
论立勇
刘春涛
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North China Electric Power University
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North China Electric Power University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Abstract

The invention relates to a transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat, which comprises a compressor, a cooling-medium and water sleeve pipe type heat exchanger, a reservoir, a throttle valve, an indoor finned tube heat exchanger, a sleeve pipe type heat regenerator, a gas and liquid separator and a temperature preserving water tank, wherein a working medium inlet of a cavity between an inner pipe and an outer pipe of the cooling-medium and water sleeve pipe type heat exchanger is connected with a high pressure port of the compressor; carbon dioxide discharged from an working medium outlet enters a low pressure port of the compressor through the cavity between the inner pipe and the outer pipe of the cooling-medium and water sleeve pipe type heat regenerator, the reservoir, the throttle valve, the indoor finned tube heat exchanger, an inner pipe of the heat regenerator and the gas and liquid separator in order; both ends of the inner pipe of the cooling-medium and water sleeve pipe type heat exchanger are connected with the temperature preserving water tank by a water pipe; and the water pipe is provided with a pipeline pump. The cooling-medium and water sleeve pipe type heat exchanger is adopted for recycling the condensation residual heat of a heat pump type air conditioning system,; and the recycled heat is used for preparing domestic hot water, thus the energy utilization rate is not only enhanced, but also the heat pollution of the air conditioning system to the environment is reduced.

Description

A kind of CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat
Technical field
The present invention relates to a kind of CO 2 trans-critical heat pump water-heater system that utilizes air conditioner condensation hot preparation domestic hot-water, belong to technical field of heat exchange.
Background technology
Along with the use of domestic air conditioning and water heater is more and more universal, the ratio that required energy consumption accounts for social total energy consumption rises year by year.When air-conditioning moved at cooling condition, condensation heat directly entered atmosphere, not only caused the serious environmental thermal pollution, and the condenser ambient temperature is raise, and was unfavorable for the condenser heat radiation, caused condensation temperature to raise, and caused the air-conditioning unit operation energy consumption to raise.Therefore, reclaim condensation heat, not only can improve energy utilization rate, and can reduce the influence of air-conditioning environment.
Teat pump boiler can utilize low-temperature heat source, has good and economic, develops rapidly and progressively is familiar with by people.Common in the market Teat pump boiler all adopts conventional freon working medium, and except meeting caused depletion of the ozone layer and greenhouse effects, supply water temperature was also lower.Provide the occasion of high-temperature water or boiling water at needs, adopt the circulation system of conventional working medium, performance is extremely unstable.Cross when low when the residing environment temperature of evaporimeter, the efficient of unit declines to a great extent, and the leaving water temperature of water heater does not reach requirement.
Carbon dioxide is a kind of natural refrigerant, has lot of advantages: safe in utilization, nontoxic; Physical and chemical stability is good; Refrigerating effect per unit swept volume is big, helps reducing device volume; Under super critical condition, its flowing heat transfer performance is good; In addition, carbon dioxide obtains easily, and is cheap, do not need to reclaim, and it does not damage the ozone layer.Therefore, many researchers think that carbon dioxide will be the cold-producing medium of tool prospect " 21 century ".
But because the critical-temperature of carbon dioxide has only 31 ℃, be in the normal temperature scope, stride critical cycle so adopt usually.In CO 2 cross-critical circulation, the delivery temperature of compressor is than higher, generally can be more than 80 ℃, and the exothermic process of carbon dioxide carries out under supercritical pressure, and therefore big temperature glide is arranged, and this characteristic is particularly suitable for providing high-temperature-hot-water.
If the condensation heat that with the carbon dioxide is the air-conditioning system of working medium can be reclaimed the preparation domestic hot-water, can not only guarantee the temperature of hot water, also can reduce the harmful effect of air-conditioning to environment, improve rate of energy.
Summary of the invention
The object of the present invention is to provide a kind of CO 2 trans-critical heat pump type air conditioner and water heater,, improve rate of energy to reduce the harmful effect of air-conditioning to environment.
The alleged problem of the present invention realizes with following technical proposals:
A kind of CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat, comprise compressor in the formation, refrigerant-water jacket pipe heat exchanger, reservoir, choke valve, indoor finned tube exchanger, the bushing type regenerator, gas-liquid separator and attemperater, the working medium inlet of the cavity between the inner and outer pipes of described refrigerant-water jacket pipe heat exchanger connects the high-pressure mouth of compressor, the carbon dioxide that sender property outlet is discharged is the cavity between the regenerator inner and outer pipes successively, reservoir, choke valve, indoor finned tube exchanger, pipe in the regenerator, gas-liquid separator enters the compressor low pressure port, the two ends of the interior pipe of refrigerant-water jacket pipe heat exchanger all are connected with attemperater by water pipe, and water pipe is provided with tubing pump.
The above-mentioned CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat also comprises outdoor finned tube exchanger and three cross valves that are provided with, four triple valves, two check-valves and three stop valves on the working medium pipeline in the formation; Wherein, 3 mouthfuls of high-pressure mouths that connect compressor of first cross valve, 4 mouthfuls of working medium inlets that connect refrigerant-water jacket pipe heat exchanger, 1 mouthful connects tube inlet in the regenerator; 9 mouthfuls of sender property outlets that connect refrigerant-water jacket pipe heat exchanger of first triple valve, 10 mouthfuls of 21 mouthfuls of connecing second cross valve, 11 mouthfuls of 4 mouthfuls of connecing first cross valve, 22 mouthfuls of second cross valve connect the suitable for reading of outdoor finned tube exchanger, 23 mouthfuls of 12 mouthfuls of connecing second triple valve, 24 mouthfuls of 15 mouthfuls and 19 mouthfuls of the 4th triple valve that connect the 3rd triple valve through second check-valves; 5 mouthfuls of 13 mouthfuls of connecing second triple valve of the 3rd cross valve, 6 mouthfuls connect choke valve inlet, 7 mouthfuls of 16 mouthfuls of connecing the 3rd triple valve, 8 mouthfuls of inlets that connect the cavity between the regenerator inner and outer pipes; 14 mouthfuls of end openings that connect outdoor finned tube exchanger of second triple valve; 17 mouthfuls of end openings that connect outdoor finned tube exchanger through first check-valves of the 3rd triple valve; First stop valve is connected between the working medium inlet of refrigerant-water jacket pipe heat exchanger and indoor finned tube exchanger suitable for reading; Second stop valve is connected between 2 mouthfuls of first cross valve and indoor finned tube exchanger suitable for reading; The 3rd stop valve is connected between the end opening of 8 mouthfuls of the 3rd cross valve and indoor finned tube exchanger; 18 mouthfuls of 2 mouthfuls of connecing first cross valve of the 4th triple valve, 20 mouthfuls of end openings that connect indoor finned tube exchanger.
The above-mentioned CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat, the outer surface parcel insulation material of the connecting pipe between described regenerator, refrigerant-water jacket pipe heat exchanger and each parts.
The above-mentioned CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat, described indoor finned tube exchanger and outdoor finned tube exchanger are air-cooled.
The above-mentioned CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat is provided with electric heater in the described attemperater.
The present invention adopts refrigerant-water jacket pipe heat exchanger to reclaim the condensation waste heat of heat pump type air conditioning system, and utilizes the heat that reclaims to prepare the domestic hot-water, has not only improved energy utilization rate, and has alleviated the thermal pollution of air-conditioning to environment.Native system adopts carbon dioxide as cold-producing medium, safety and environmental protection, cheap, and the exothermic process of carbon dioxide has bigger temperature glide, is fit to provide high-temperature-hot-water.The present invention promptly is fit to chilling requirement, the little places of hot water amount such as family, is fit to hotel, bathhouse, hospital, sanatorium, school, fitness center, hairdressing center, army, the chilling requirements such as dormitory of industrial enterprise, place that the hot water amount is big again.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing;
Fig. 1 is a system schematic of the present invention;
Fig. 2 is the loop schematic diagram of refrigeration+hot water pattern;
Fig. 3 is the loop schematic diagram of single refrigeration mode;
Fig. 4 is the loop schematic diagram of hot water pattern;
Fig. 5 heats+the loop schematic diagram of hot water pattern;
Fig. 6 is the loop schematic diagram of single heating mode.
Each label is among the figure: A, compressor; B, refrigerant-water jacket pipe heat exchanger; C, outdoor finned tube exchanger; D, reservoir; E, choke valve; F, indoor finned tube exchanger; G, regenerator; H, gas-liquid separator; I, electric heater; J, attemperater; K, tubing pump; L, thermocouple; M, first cross valve; N, second cross valve; O, the 3rd cross valve; P, first triple valve; Q, second triple valve; R, the 3rd triple valve; S, the 4th triple valve; T, first check-valves; U, second check-valves; V, first stop valve; W, second stop valve; X, the 3rd stop valve.
The specific embodiment
By regulating three-way solenoid valve, cross valve, the stop valve among Fig. 1, change the flow direction of working medium, the present invention can realize respectively freezing+hot water, the function of singly freezing, heating water, heating+hot water, singly heating.Among Fig. 2~Fig. 6, dotted line is represented pent pipeline.
1) refrigeration+hot water pattern
Referring to Fig. 2, when moving under refrigeration+hot water pattern, the flow direction of control triple valve, cross valve is closed the first stop valve V, the 3rd stop valve X, opens the second stop valve W, replaces outdoor finned tube exchanger C with refrigerant-water jacket pipe heat exchanger B.The HTHP carbon dioxide enters refrigerant-water jacket pipe heat exchanger B through the first cross valve M (3-4) and heats the domestic hot-water, after carbon dioxide is cooled through the first triple valve P (9-10), the second cross valve N (21-23), the second triple valve Q (12-13) and the 3rd cross valve O (5-8) enter regenerator G and further lower the temperature, expand at choke valve E place then, through the 3rd cross valve O (6-7) and the 3rd triple valve R (16-15), the 4th triple valve S (19-20) inlet chamber internally finned tube heat exchanger F absorbs the air heat, to indoor cooling, pass through stop valve W then, it is overheated that the first cross valve M (2-1) enters regenerator G, enter compressor A through gas-liquid separator H, finish a circulation.Like this, compressor A, refrigerant-water jacket pipe heat exchanger B, regenerator G, reservoir D, choke valve E, indoor finned tube exchanger F enough become a loop with gas-liquid separator H.
Originally be discharged to heat in the environment, be recycled among refrigerant-water jacket pipe heat exchanger B, be used to prepare the domestic hot-water by outdoor finned tube exchanger C.
2) single refrigeration mode
Referring to Fig. 3, be provided with thermocouple L at refrigerant-water jacket pipe heat exchanger B water inlet place.When system at refrigeration+hot water mode operation, thermocouple L records refrigerant-water jacket pipe heat exchanger B and goes into coolant-temperature gage and be higher than 65 ℃, it is the temperature that the interior water of attemperater J all is heated to requirement, control system is by changing the flow direction of the first triple valve P, the second triple valve Q and the second cross valve N, replace refrigerant-water jacket pipe heat exchanger B with outdoor finned tube exchanger C, single refrigeration mode operation recovers in system.Still close the first stop valve V, the 3rd stop valve X, open the second stop valve W.The HTHP carbon dioxide is through the first cross valve M (3-4), the first triple valve P (11-10) and second cross valve N (21-22) the inlet chamber external finned tube heat exchanger C are to the environmental emission heat, entering regenerator G through the second triple valve Q (14-13) and the 3rd cross valve O (5-8) after being cooled further lowers the temperature, expand at choke valve E place then, through the 3rd cross valve O (6-7) and the 3rd triple valve R (16-15), the 4th triple valve S (19-20) inlet chamber internally finned tube heat exchanger F absorbs the air heat, to indoor cooling, then through the second stop valve W, the first cross valve M (2-1) enters regenerator G and heats up, enter compressor A through gas cooler H, finish a circulation.Like this, compressor A, outdoor finned tube exchanger C, regenerator G, reservoir D, choke valve E, indoor finned tube exchanger F and gas-liquid separator H enough become a loop, both guaranteed that water temperature reached standard in the attemperater H, and can not influence the refrigeration of the internally finned tube heat exchanger E of air conditioning chamber again.
3) hot water pattern
Referring to Fig. 4, the non-air-conditioning phase, CO 2 trans-critical heat pump type air conditioner and water heater adopts the hot water pattern to prepare hot water.Control system is removed indoor finned tube exchanger F by the flow direction of control triple valve and cross valve from circulation, form typical Teat pump boiler circulation.Wherein, the first stop valve V, the second stop valve W, the 3rd stop valve X all close.The HTHP carbon dioxide enters refrigerant-water jacket pipe heat exchanger B through the first cross valve M (3-4) and heats the domestic hot-water, after carbon dioxide is cooled through the first triple valve P (9-10), the second cross valve N (21-23), the second triple valve Q (12-13) and the 3rd cross valve O (5-8) enter regenerator G and further lower the temperature, expand at choke valve E place then, through the 3rd cross valve O (6-7), the 3rd triple valve R (16-17) and stop valve T inlet chamber external finned tube heat exchanger C absorb the air heat, then through the second cross valve N (22-24), the second stop valve U, it is overheated that the 4th triple valve S (19-18) and the first cross valve M (2-1) enter regenerator G, enter compressor A through gas-liquid separator H, finish a circulation.Be that compressor A, refrigerant-water jacket pipe heat exchanger B, regenerator G, reservoir D, choke valve E, outdoor finned tube exchanger C and gas-liquid separator H constitute a loop.
Like this, system moves under the hot water pattern, because the COP of heat pump cycle is higher, more conventional electric heater, gas heater are saved high-quality thermal source.
4) heat+the hot water pattern
Referring to Fig. 5, winter, CO 2 trans-critical heat pump type air conditioner and water heater adopts and to heat+and the hot water pattern is the room hot wind supply, heat water.When system during at the hot water mode operation, control system is opened the first stop valve V, the 3rd stop valve X, closes the second stop valve W, makes refrigerant-water jacket pipe heat exchanger B and the indoor finned tube exchanger F system that enters in parallel.The HTHP carbon dioxide is punished into two branch roads through the first cross valve M (3-4) back at a.Partial CO 2 is given air through the first stop valve V inlet chamber internally finned tube heat exchanger F heat release, to indoor heating, then through the 3rd stop valve X to figure mid point b place; Partial CO 2 enters refrigerant-water jacket pipe heat exchanger B and heats the domestic hot-water, after being cooled through the first triple valve P (9-10), the second cross valve N (21-23), the second triple valve Q (12-13) and the 3rd cross valve O (5-8) are after a b place and another branch road carbon dioxide converge, entering regenerator G further lowers the temperature, expand at choke valve E place then, through the 3rd cross valve O (6-7), the 3rd triple valve R (16-17) and stop valve T inlet chamber external finned tube heat exchanger C absorb the air heat, then through the second cross valve N (22-24), stop valve U, it is overheated that the 4th triple valve S (19-18) and the first cross valve M (2-1) enter regenerator G, enter compressor A through gas-liquid separator H, finish a circulation.
5) single heating mode
Referring to Fig. 6, when system is heating+the hot water mode operation, thermocouple L records return water temperature and is higher than 65 ℃, and promptly the water in the attemperater J all is heated to the temperature of requirement.Control system changes the flow direction of triple valve and cross valve, closes the first stop valve V, the 3rd stop valve X, opens the second stop valve W, and refrigerant-water jacket pipe heat exchanger B is removed from circulation, and the operation of pump type heat list heating mode recovers in system.The HTHP carbon dioxide is given air through the first cross valve M (3-2) and the second stop valve W inlet chamber internally finned tube heat exchanger F heat release, to indoor heating, after the cooling through the 4th triple valve S (20-19), the 3rd triple valve R (15-16) and the 3rd cross valve O (7-8) enter regenerator G and further lower the temperature, expand at choke valve E place then, through the 3rd cross valve O (6-5) and the outer atmosphere heat of second triple valve Q (13-14) the inlet chamber external finned tube heat exchanger C absorption chamber, after through the second cross valve N (22-21), the first triple valve P (10-11) and the first cross valve M (4-1) enter regenerator G and heat up, enter compressor A through gas cooler H, finish a circulation.Be that compressor A, indoor finned tube exchanger F, regenerator G, reservoir D, choke valve E, outdoor finned tube exchanger C and gas-liquid separator H constitute a loop.
The used compressor A of native system is the carbon dioxide dedicated compressor.Refrigerant-water jacket pipe heat exchanger B is reverse-flow, is carbon dioxide working medium between interior pipe and the outer tube, and interior pipe inside is heated domestic hot-water.Heat exchanger outer surface parcel insulation material.Indoor finned tube exchanger F, outdoor finned tube exchanger C are air-cooled, and tube outer surface is provided with fin.Regenerator G is a double pipe heat exchanger, is the carbon dioxide working medium that is cooled between interior pipe and the outer tube, and interior pipe inside is heated carbon dioxide working medium.Regenerator outer surface parcel insulation material.Adopt pipeline to be connected between each parts, pipe outer wrapping insulation material.

Claims (5)

1. CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat, it is characterized in that it comprises compressor (A), refrigerant-water jacket pipe heat exchanger (B), reservoir (D), choke valve (E), indoor finned tube exchanger (F), bushing type regenerator (G), gas-liquid separator (H) and attemperater (J); The working medium inlet (a) of the cavity between the inner and outer pipes of described refrigerant-water jacket pipe heat exchanger (B) connects the high-pressure mouth (d) of compressor (A), the carbon dioxide that sender property outlet (b) is discharged is the cavity between regenerator (G) inner and outer pipes successively, reservoir (D), choke valve (E), indoor finned tube exchanger (F), pipe in the regenerator (G), gas-liquid separator (H) enters compressor (A) low pressure port (c), the two ends of the interior pipe of refrigerant-water jacket pipe heat exchanger (B) all are connected with attemperater (J) by water pipe, and water pipe is provided with tubing pump (K).
2. according to the described CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat of claim 1, it is characterized in that it also comprises outdoor finned tube exchanger (C) and three cross valves that are provided with, four triple valves, two check-valves and three stop valves on the working medium pipeline; Wherein, 3 mouthfuls of high-pressure mouths that meet compressor (A) of first cross valve (M), 4 mouthfuls of working medium inlets that connect refrigerant-water jacket pipe heat exchanger (B), 1 mouthful connects the interior tube inlet of regenerator (G); 9 mouthfuls of sender property outlets that connect refrigerant-water jacket pipe heat exchanger (B) of first triple valve (P), 10 mouthfuls of 21 mouthfuls of connecing second cross valve (N), 11 mouthfuls of 4 mouthfuls of connecing first cross valve (M), 22 mouthfuls of second cross valve (N) connect the suitable for reading of outdoor finned tube exchanger (C), 23 mouthfuls of 12 mouthfuls of connecing second triple valve (Q), 24 mouthfuls of 15 mouthfuls and 19 mouthfuls of the 4th triple valve (S) that connect the 3rd triple valve (R) through second check-valves (U); 5 mouthfuls of 13 mouthfuls of connecing second triple valve (Q) of the 3rd cross valve (O), 6 mouthfuls connect choke valve (E) inlet, 7 mouthfuls of 16 mouthfuls of connecing the 3rd triple valve (R), 8 mouthfuls of inlets that connect the cavity between regenerator (G) inner and outer pipes; 14 mouthfuls of end openings that meet outdoor finned tube exchanger (C) of second triple valve (Q); 17 mouthfuls of end openings that meet outdoor finned tube exchanger (C) through first check-valves of the 3rd triple valve (R); First stop valve (V) is connected between the working medium inlet of refrigerant-water jacket pipe heat exchanger (B) and indoor finned tube exchanger (F) suitable for reading; Second stop valve (W) is connected between 2 mouthfuls of first cross valve (M) and indoor finned tube exchanger (F) suitable for reading; The 3rd stop valve (X) is connected between the end opening of 8 mouthfuls of the 3rd cross valve (O) and indoor finned tube exchanger (F); 18 mouthfuls of 2 mouthfuls of connecing first cross valve (M) of the 4th triple valve (S), 20 mouthfuls of end openings that meet indoor finned tube exchanger (F).
3. according to claim 1 or the 2 described CO 2 trans-critical heat pump type air conditioner and water heaters that utilize the condensation waste heat, it is characterized in that the outer surface parcel insulation material of the connecting pipe between described regenerator (G), refrigerant-water jacket pipe heat exchanger (B) and each parts.
4. according to the described CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat of claim 3, it is characterized in that described indoor finned tube exchanger (F) and outdoor finned tube exchanger (C) are air-cooled.
5. according to the described CO 2 trans-critical heat pump type air conditioner and water heater that utilizes the condensation waste heat of claim 4, it is characterized in that, be provided with electric heater (I) in the described attemperater (J).
CN 201010521709 2010-10-27 2010-10-27 Transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat Expired - Fee Related CN102003833B (en)

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CN102620475B (en) * 2012-04-09 2014-06-18 浙江大学 Multifunctional solar-assisted carbon dioxide heat pump system
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CN103225850A (en) * 2013-05-16 2013-07-31 王全龄 Muted air conditioning system
CN103225850B (en) * 2013-05-16 2016-08-03 王全龄 A kind of silent air-conditioning system
CN103453691A (en) * 2013-08-06 2013-12-18 尹炯钜 Three-in-one air conditioner and hot water supply device
CN103453691B (en) * 2013-08-06 2015-07-01 尹炯钜 Three-in-one air conditioner and hot water supply device
CN105783330A (en) * 2014-12-25 2016-07-20 华北电力大学(保定) Distributive energy system of heat engine driven VM circulating heat pump
CN105783330B (en) * 2014-12-25 2018-06-22 华北电力大学(保定) A kind of distributed energy resource system of heat engine driving VM circulating heat pumps
CN104501339A (en) * 2015-01-08 2015-04-08 中建安装工程有限公司 Integrated modular large chilled water storage system
CN106225311A (en) * 2016-07-27 2016-12-14 哈尔滨工业大学 A kind of condensation heat recovery type air source solar energy coupling heat pump air conditioning and water heating system
CN106225311B (en) * 2016-07-27 2019-01-08 哈尔滨工业大学 A kind of condensation heat recovery type air-source-solar energy coupling heat pump air conditioning and water heating system
CN106196698A (en) * 2016-08-01 2016-12-07 北京工业大学 A kind of directly condensation heating heat pump apparatus of air source of band radiator
CN106196698B (en) * 2016-08-01 2019-04-30 北京工业大学 A kind of directly condensation heating heat pump apparatus of air source with radiator
CN106568235A (en) * 2016-09-30 2017-04-19 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to industrial field
CN106247654B (en) * 2016-10-08 2018-12-14 广东美的暖通设备有限公司 The multi-functional multi-connected air conditioning system of two control of one kind and its control method
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CN107990584A (en) * 2017-11-23 2018-05-04 西安交通大学 A kind of CO 2 trans-critical heat pump formula refrigeration system

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