CN103017282A - Complementary heat pump air-conditioning system based on multiple renewable energy resources - Google Patents
Complementary heat pump air-conditioning system based on multiple renewable energy resources Download PDFInfo
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- CN103017282A CN103017282A CN2013100040269A CN201310004026A CN103017282A CN 103017282 A CN103017282 A CN 103017282A CN 2013100040269 A CN2013100040269 A CN 2013100040269A CN 201310004026 A CN201310004026 A CN 201310004026A CN 103017282 A CN103017282 A CN 103017282A
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Abstract
The invention discloses a complementary heat pump air-conditioning system based on multiple renewable energy resources, which belongs to the field of heat pump air-conditioning. The system is characterized in that a solar thermal collector is simultaneously connected with a constant-temperature anaerobic fermentation device and a low-temperature water tank; the constant-temperature anaerobic fermentation device is sequentially connected with an air compression device, a purification device and a gas storage device; the gas storage device is sequentially connected with a marsh gas water heater and a gas port A for a user to use; a hot water port of marsh gas water heater is simultaneously connected with the low-temperature water tank, a first hot water port B and a first backwater port C; the low-temperature water tank is provided with a second hot water port D and a second backwater port E; an outdoor air-cooling type heat exchanger and a heat exchanger in the low-temperature water tank are connected in parallel; the outdoor air-cooling-type heat exchanger and a heat exchanger in a moderate-temperature water tank are connected in parallel; and the moderate-temperature water tank is provided with a third hot water port F and a third backwater port G.
Description
Technical field
The present invention relates to the Building Heat pump air conditioner system.
Background technology
In China, building energy consumption accounts for more than 20% of national total energy consumption, and heating and air conditioning energy consumption account for 2/3 of building energy consumption.Adopt advanced heat pump energy-conserving technology to solve user's heat supply in winter, summer refrigeration, annual domestic hot-water in conjunction with the biomass anaerobic fermentation technology and be the better approach of this part energy demand of solution with the demand of combustion gas.
The vapor compression heat pump air-conditioning system generally is divided into the types such as air-source, solar energy, water source, soil source heat pump according to the difference of low-temperature heat source.The air conditioner with air-source heat pump group since its can heat and can freeze, easy for installation, the characteristics such as operation is simple, obtained in recent years significant progress and extensive use.But when outdoor temperature is low in the winter time, the evaporating temperature of heat pump working medium is also lower, the compressor air suction temperature is lower, so that compressor exhaust temperature is lower, condensation temperature is lower, and the heating capacity of source pump reduces, coefficient of performance in heating is corresponding decline also, simultaneously lower evaporating temperature is easier makes the frosting of evaporimeter wall, and unit is difficult to normal operation, usually can not satisfy user's thermic load requirement.Multiple low-temperature heat source complementation provides feasible method for head it off.
Vigorously advocate energy-saving and emission-reduction in country, open under the situation of the renewable sources of energy, renewable energy utilization is combined with the heat pump energy-conserving technology, satisfy user's heat supply in winter, summer refrigeration, annual domestic hot-water fully and with the demand of combustion gas, have important practical significance.About this respect, domestic more existing Patents.
Chinese invention patent " a kind of renewable energy source heat pump " (application number: 200810162706, Granted publication number: CN101476776A) proposed a kind of tide energy carries out heat supply in conjunction with heat pump method and products thereof of utilizing, when morning and evening tides comes interim, under the effect of water-head, impeller and the operation of interlock transducer driven source pump produce hot water and carry out heat supply.
Chinese invention patent " a kind of composite solar pump hot-water heating system " (application number: 201110293491, Granted publication number: CN102506465A) introduced a kind of solar source and air-source of adopting as the combined heat pump hot-water heating system of heat pump low-temperature heat source.System is made of two heating modes, is respectively the series and parallel connections pattern.When adopting series model, solar thermal collector heats hot water storage tank, and as the evaporation thermal source of water resource heat pump, water resource heat pump heats water tank under than the high evaporation temperature conditions hot water storage tank simultaneously; When adopting paralleling model, solar thermal collector and air source heat pump satisfy demand for heat simultaneously to heating water tanks.
Chinese invention patent " balcony wall-hanging solar-air source composite heat pump system " (application number: 200810160419, Granted publication number: CN101408357A) disclose a kind of balcony wall-hanging solar-air source composite heat pump system, wherein the air source heat pump module is conventional heat pump, the outdoor heat exchanger wall-hanging solar water heater/heat exchanger that is connected in parallel mainly is comprised of heavy caliber pressure-bearing vacuum glass heat collection tube, pressure-bearing stainless steel sleeve pipe, cold water division box and U-shaped cold-producing medium copper pipe four parts.Wall-hanging solar water heater/heat exchanger can play the effect of solar water heater, can play under different operating modes again and utilize solar energy and heat pump condensation heat, plays the effect of heat exchanger.
Chinese utility model patent " air-solar energy-ground energy three heat-source composite heat pump devices " (application number: 200820069365, Granted publication number: CN201163124Y) provide a kind of air of realizing comprehensive utilization of energy-solar energy-ground can three heat-source composite heat pump devices, both solved the solar energy instability problem, take full advantage of again solar energy, reduce the underground water consumption of earth source heat pump and energy consumption, solar water heating system, air source heat pump and earth source heat pump are combined.
This shows, more existing Patents major parts effectively combine solar energy, air heat energy, can equal energy source in two or three low-temperature heat source as heat pump, but rarely have this regenerative resource of the biomass energy of mentioning.
Summary of the invention
The purpose of this invention is to provide a kind ofThe complementary heat pump type air conditioning system of multiple renewable energy sources.
The present invention is the complementary heat pump type air conditioning system of multiple renewable energy sources, this system comprises solar thermal collector 1, constant temperature anaerobic fermentation device 2, heat exchanger 3 in the constant temperature anaerobic fermentation device, compressing device 4, purifier 5, caisson 6, Marsh gas water heater 7, low temperature water tank 8, heat exchanger 9 in the low temperature water tank, outdoor air-cooled heat exchanger 10, choke valve 11,12, four-way change-over valve 13, compressor 14, indoor air-cooled heat exchanger 15, middle reservoir 16, heat exchanger 17 in the middle reservoir, three water circulating pumps 18,19 and 20 and necessary by-pass valve control 21 ~ 33,7 ports being arranged for the user, is respectively combustion gas port A, the first hot water port B, the first backwater port C, the second hot water port D, the second backwater port E, the 3rd hot water port F and the 3rd backwater port G; Wherein said solar thermal collector 1 is connected with low temperature water tank 8 with constant temperature anaerobic fermentation device 2 simultaneously, be connected with compressing device 4 in turn behind the constant temperature anaerobic fermentation device 2, purifier 5, caisson 6, be connected with Marsh gas water heater 7 behind the caisson 6 and for user's combustion gas port A, interface of hot water while and the low temperature water tank 8 of Marsh gas water heater 7, the first hot water port B and the first backwater port C are connected, low temperature water tank 8 is provided with the second hot water port D and the second backwater port E, heat exchanger 9 is connected in parallel in outdoor air-cooled heat exchanger 10 and the low temperature water tank, heat exchanger 17 is connected in parallel in indoor air-cooled heat exchanger 15 and the middle reservoir, and middle reservoir 16 is provided with the 3rd hot water port F and the 3rd backwater port G; The two ends of the heat exchanger 3 in the constant temperature anaerobic fermentation device 2 are connected with solar thermal collector 1 or low temperature water tank 8.
The complementary heat pump type air conditioning system of the multiple renewable energy sources that the present invention relates to is with solar energy utilization technique, Biomass under Constant anaerobic fermentation technology and air source heat pump technology combine, realized storing daytime solar thermal energy for constant temperature anaerobic fermentation device and heat pump night, the introducing of constant temperature anaerobic fermentation technology has solved the low outstanding problem of air source heat pump performance under the intermittence of solar energy and the low temperature environment, the complementation of three kinds of regenerative resources has improved the heat pump reliability greatly, enlarged its range of application, according to the principle of energy grade step counterpart, adopt different mode of operations to satisfy user's heat supply in winter, freeze summer, annual domestic hot-water and with the primary demand of combustion gas.The present invention has the following advantages:
(1) can utilize simultaneously solar thermal energy, biomass energy and three kinds of very huge regenerative resources of stock number of air heat energy, can gather materials on the spot, cost is extremely low, and range of application is very extensive;
(2) can satisfy user's heat supply in winter, summer refrigeration, annual domestic hot-water's demand fully, realize a tractor serves several purposes, improve the utilization ratio of system;
(3) the complementary energy supply of solar thermal energy, biomass energy and air heat energy has overcome intermittence and the instability problem of solar energy, has solved air source heat pump performance in winter and has reduced the sharp contradiction that increases with thermic load;
(4) the Biomass under Constant anaerobic fermentation has higher pond appearance factor of created gase, takes full advantage of the condition that existing solar energy heat collection equipment provides the constant temperature anaerobic fermentation, has realized the multi-use of solar thermal collector, improves its utilization ratio, has reduced system operation cost;
(5) the solar heat water circulation can realize the low-temperature heat collection of solar thermal collector as the low-temperature heat source of heat pump air conditioner evaporimeter, and collector efficiency improves, and radiation loss is little.
Description of drawings
Fig. 1 is systematic schematic diagram of the present invention, sequence number among the figure: 1-solar thermal collector, 2-constant temperature anaerobic fermentation device, heat exchanger in the 3-constant temperature anaerobic fermentation device, 4-compressing device, the 5-purifier, the 6-caisson, 7-Marsh gas water heater, 8-low temperature water tank, heat exchanger in the 9-low temperature water tank, the outdoor air-cooled heat exchanger of 10-, 11, the 12-choke valve, the 13-four-way change-over valve, the 14-compressor, the indoor air-cooled heat exchanger of 15-, reservoir among the 16-, heat exchanger in the reservoir among the 17-, 18,19, the 20-water circulating pump, 21,22,23,24,25,26,27,28,29,30,31,32, the 33-by-pass valve control.
The specific embodiment
As shown in Figure 1, the present invention is the complementary heat pump type air conditioning system of multiple renewable energy sources, this system comprises solar thermal collector 1, constant temperature anaerobic fermentation device 2, heat exchanger 3 in the constant temperature anaerobic fermentation device, compressing device 4, purifier 5, caisson 6, Marsh gas water heater 7, low temperature water tank 8, heat exchanger 9 in the low temperature water tank, outdoor air-cooled heat exchanger 10, choke valve 11,12, four-way change-over valve 13, compressor 14, indoor air-cooled heat exchanger 15, middle reservoir 16, heat exchanger 17 in the middle reservoir, three water circulating pumps 18,19 and 20 and necessary by-pass valve control 21 ~ 33,7 ports being arranged for the user, is respectively combustion gas port A, the first hot water port B, the first backwater port C, the second hot water port D, the second backwater port E, the 3rd hot water port F and the 3rd backwater port G; Wherein said solar thermal collector 1 is connected with low temperature water tank 8 with constant temperature anaerobic fermentation device 2 simultaneously, be connected with compressing device 4 in turn behind the constant temperature anaerobic fermentation device 2, purifier 5, caisson 6, be connected with Marsh gas water heater 7 behind the caisson 6 and for user's combustion gas port A, interface of hot water while and the low temperature water tank 8 of Marsh gas water heater 7, the first hot water port B and the first backwater port C are connected, low temperature water tank 8 is provided with the second hot water port D and the second backwater port E, heat exchanger 9 is connected in parallel in outdoor air-cooled heat exchanger 10 and the low temperature water tank, heat exchanger 17 is connected in parallel in indoor air-cooled heat exchanger 15 and the middle reservoir, and middle reservoir 16 is provided with the 3rd hot water port F and the 3rd backwater port G; The two ends of the heat exchanger 3 in the constant temperature anaerobic fermentation device 2 are connected with solar thermal collector 1 or low temperature water tank 8.
As shown in Figure 1, the heating agent in solar thermal collector 1 and low temperature water tank 8, middle reservoir 16 and the pipeline that is connected thereof can be water or other anti-icing fluid.
As shown in Figure 1,Be provided with First Heat Exchanger 9 and the second heat exchanger 17 in low temperature water tank 8 and the middle reservoir 16, First Heat Exchanger 9 and the second heat exchanger 17 are coiled structures, or the fin tube type structure.
As shown in Figure 1,In the low temperature water tank 8 heat exchanger 9 be connected air-cooled heat exchanger 10 and connect respectively first throttle valve 11 and the second choke valve 12, switch two loops by the first by-pass valve control 27 and the second by-pass valve control 28.
As shown in Figure 1,Compressor 14 is invariable frequency compressors, or frequency-changeable compressor, use existing working medium commonly used, or novel environment-friendly refrigerant is done refrigerant.
As shown in Figure 1,Hot water feeding pipe's mouth and the moisturizing mouth of pipe are set on low temperature water tank 8 and the middle reservoir 16.
As shown in Figure 1,Water circulating pump 19 is provided with bypass circulation, closes by the 3rd by-pass valve control 30 and the 4th by-pass valve control 33 control the logical of two loops.
AsShown in Figure 1, when solar radiation is sufficient, utilize solar thermal collector 1 thermal-arrest to make in the constant temperature anaerobic fermentation device 2 and keep ferment at constant temperature, water in the unnecessary solar thermal energy heating low temperature water tank 8, the biogas that fermentation produces is stored in the caisson 6 through compressing device 4 and purifier 5, utilizes Marsh gas water heater 7 that the water in the low temperature water tank 8 is heated.If water temperature is higher in solar energy abundance and the low temperature water tank 8, can utilize the hot water heating in the low temperature water tank 8; If biogas is sufficient, the user can pass through the first hot water port B, the first backwater port C heat-obtaining, uses combustion gas by combustion gas port A.If solar energy and biogas are not enough, the water temperature in the low temperature water tank 8 can not meet the demands, and needs to start heat pump assembly, and the water in the low temperature water tank 8 carries out heat supply as low-temperature heat source adds the water of pining in the reservoir 16 by heat pump cycle.
As shown in Figure 1, when solar energy and biogas wretched insufficiency, in the time of can't providing enough heat to the water in the low temperature water tank 8, opening chamber's exogenous wind cold type heat exchanger 10 carries out heat supply with the pattern of air source heat pump.Because have 3 energy storage devices (caisson 6, low temperature water tank 8 and middle reservoir 16) and 3 kinds of Power supplies (solar thermal energy, biomass energy and air heat energy) in the native system, Systems balanth and reliability improve.
In sum, the present invention has for functions such as combustion gas, heat supply, refrigeration, and each function realizes approach, and details are as follows.
One, for combustion gas
The biogas that constant temperature anaerobic fermentation device 2 produces in the system of the present invention enters caisson 6 through compressing device 4, purifier 5, by combustion gas port A for the user.The ferment at constant temperature environment of constant temperature anaerobic fermentation device 2 can be realized by following two kinds of approach.
(1) solar thermal collector heating
When solar radiation is sufficient, ON cycle water pump 20, by-pass valve control 22 and 31, hot water enters under the effect of water circulating pump 20 in the heat exchange coil 3 in the constant temperature anaerobic fermentation device 2 in the solar thermal collector 1, and the heating zymotic fluid remains unchanged its fermentation temperature substantially.
(2) low temperature water tank heating
When solar radiation is not enough, ON cycle water pump 20, by-pass valve control 21, the 22 and the 3rd by-pass valve control 33, close water circulating pump 19 and the 3rd by-pass valve control 30, by-pass valve control 31, the heating agent in the low temperature water tank 8 enters in the heat exchange coil 3 and heats zymotic fluid, and its fermentation temperature is remained unchanged substantially.When the heat medium temperature in the low temperature water tank 8 is low, open Marsh gas water heater 7, water circulating pump 18 and by-pass valve control 26,32, the heating agent in the heating low temperature water tank 8.
Two,Heat supply
The heat supply mode of system of the present invention has following several.
(1) solar-heating
As shown in Figure 1, when intensity of solar radiation is better, but the hot water direct heating that solar thermal collector 1 produces, by-pass valve control 21, the 3rd by-pass valve control 30 and by-pass valve control 31 are opened at this moment, water circulating pump 19 work.Heating agent in the low temperature water tank 8 enters solar thermal collector 1 through water circulating pump 19, sends low temperature water tank 8 after being heated back to, and hot water passes through the second hot water port D, the second backwater port E for the user in the low temperature water tank 8.
(2) gas heating
As shown in Figure 1, when combustion gas is sufficient in the caisson 6, can be by Marsh gas water heater 7 heating backwater direct heatings, this moment, by-pass valve control 32 was closed, by-pass valve control 26 is opened, the heating agent of the first backwater port C enters Marsh gas water heater 7 and is heated to specified temp, returns the first hot water port B by by-pass valve control 26, for the user.
(3) heat pump heat supply
As shown in Figure 1, utilize heat pump cycle with the heating medium for heating in the middle reservoir 16, carry out heat supply by the 3rd hot water port F, the 3rd backwater port G.The heat pump cycle of system of the present invention has two evaporimeters, is respectively First Heat Exchanger 9 and outdoor air-cooled heat exchanger 10 in the low temperature water tank 8; Three kinds of low-temperature heat sources are arranged, respectively solar thermal energy, biomass energy and air heat energy, wherein the First Heat Exchanger 9(in the corresponding low temperature water tank 8 of solar thermal energy and biomass energy is called the water source), air heat energy respective chamber/chambers exogenous wind cold type heat exchanger 10(is called air-source), according to the difference of evaporimeter, the heat pump heat supply pattern is divided into following three types.
In the air source heat pump pattern, air is low-temperature heat source, and outdoor air cooling heat exchanger 10 is evaporimeter, and this moment, the second by-pass valve control 28 was opened, and the first by-pass valve control 27 is closed.After cold-producing medium is compressed by compressor 14,, enter finally by the second choke valve 12 and to enter compressor 14 behind the heat in outdoor air-cooled heat exchanger 10 absorbing airs and finish a circulation to the water release heat through second heat exchanger 17 of four-way change-over valve 13 to the middle reservoir 16.The user takes the hot water in the middle reservoir by the 3rd hot water port F, the 3rd backwater port G.
In the Water Source Heat Pump Pattern, hot water in the low temperature water tank 8 is low-temperature heat source, and First Heat Exchanger 9 is evaporimeter, and the hot water in the low temperature water tank 8 can come from solar thermal collector 1 also can come from Marsh gas water heater 7, this moment, the first by-pass valve control 27 was opened, and the second by-pass valve control 28 is closed.Cold-producing medium by compressor 14 compression after, enter finally by first throttle valve 11 and enter compressor 14 behind the heat that absorbs water in the low temperature water tank 8 in the heat exchanger 9 and finish a circulation to the water release heat through four-way change-over valve 13 heat exchanger 17 to the middle reservoir 16.The user takes the hot water in the middle reservoir by the 3rd hot water port F, the 3rd backwater port G.
Air source heat pump adds in the Water Source Heat Pump Pattern, the first by-pass valve control 27 and the second by-pass valve control 28 are all opened, two evaporimeters are worked simultaneously, after cold-producing medium is compressed by compressor 14, through four-way change-over valve 13 to the middle reservoir 16 heat exchanger 17 to the water release heat, enter respectively First Heat Exchanger 9 and outdoor air-cooled heat exchanger 10 finally by first throttle valve 11 and the second choke valve 12, absorb respectively and enter compressor 14 behind the heat of water in the low temperature water tank 8 and the airborne heat and finish a circulation.The user takes the hot water in the middle reservoir by the 3rd hot water port F, the 3rd backwater port G.
Three,Refrigeration
System of the present invention can separate refrigeration, hot water preparing when also can freeze.
(1) separate refrigeration
During separate refrigeration, the second by-pass valve control 28, by-pass valve control 29 are opened, the first by-pass valve control 27 is closed, after cold-producing medium is compressed by compressor 14, through four-way change-over valve 13 to the outdoor air-cooled heat exchanger 10 to the environment release heat, enter indoor air-cooled heat exchanger 15 finally by the second choke valve 12, enter compressor 14 behind the heat of absorption room air and finish a circulation.The user obtains cold by indoor air-cooled heat exchanger 15.
(2) the double water heating of refrigeration
When refrigeration is held concurrently water heating, the first by-pass valve control 27, by-pass valve control 29 are opened, the second by-pass valve control 28 is closed, after cold-producing medium is compressed by compressor 14, through four-way change-over valve 13 to the low temperature water tank 8 First Heat Exchanger 9 to the water release heat, enter indoor air-cooled heat exchanger 15 finally by first throttle valve 11, enter compressor 14 behind the heat of absorption room air and finish a circulation.The user obtains cold by indoor air-cooled heat exchanger 15, takes hot water in the low temperature water tank by the second hot water port D, the second backwater port E.
Claims (7)
1. the complementary heat pump type air conditioning system of multiple renewable energy sources, it is characterized in that: this system comprises solar thermal collector (1), constant temperature anaerobic fermentation device (2), heat exchanger (3) in the constant temperature anaerobic fermentation device, compressing device (4), purifier (5), caisson (6), Marsh gas water heater (7), low temperature water tank (8), heat exchanger in the low temperature water tank (9), outdoor air-cooled heat exchanger (10), choke valve (11,12), four-way change-over valve (13), compressor (14), indoor air-cooled heat exchanger (15), middle reservoir (16), heat exchanger in the middle reservoir (17), three water circulating pumps (18,19 and 20) and necessary by-pass valve control (21 ~ 33), 7 ports being arranged for the user, is respectively combustion gas port (A), the first hot water port (B), the first backwater port (C), the second hot water port (D), the second backwater port (E), the 3rd hot water port (F) and the 3rd backwater port (G); Wherein said solar thermal collector (1) is connected with low temperature water tank (8) with constant temperature anaerobic fermentation device (2) simultaneously, be connected with compressing device (4) behind the constant temperature anaerobic fermentation device (2) in turn, purifier (5), caisson (6), be connected with Marsh gas water heater (7) behind the caisson (6) and for user's combustion gas port (A), interface of hot water while and the low temperature water tank (8) of Marsh gas water heater (7), the first hot water port (B) and the first backwater port (C) are connected, low temperature water tank (8) is provided with the second hot water port (D) and the second backwater port (E), heat exchanger (9) is connected in parallel in outdoor air-cooled heat exchanger (10) and the low temperature water tank, heat exchanger (17) is connected in parallel in indoor air-cooled heat exchanger (15) and the middle reservoir, and middle reservoir (16) is provided with the 3rd hot water port (F) and the 3rd backwater port (G); The two ends of the heat exchanger (3) in the constant temperature anaerobic fermentation device (2) are connected with solar thermal collector (1) or low temperature water tank (8).
2. according to the complementary heat pump type air conditioning system of claims 1 described multiple renewable energy sources, it is characterized in that: the heating agent in solar thermal collector (1) and low temperature water tank (8), middle reservoir (16) and the pipeline that is connected thereof can be water or other anti-icing fluid.
3. according to the complementary heat pump type air conditioning system of claims 1 described multiple renewable energy sources, it is characterized in that: be provided with First Heat Exchanger (9) and the second heat exchanger (17) in low temperature water tank (8) and the middle reservoir (16), First Heat Exchanger (9) and the second heat exchanger (17) are the coiled structures, or the fin tube type structure.
4. according to the complementary heat pump type air conditioning system of claims 1 described multiple renewable energy sources, it is characterized in that: heat exchanger (9) and the air-cooled heat exchanger (10) of being connected connect respectively first throttle valve (11) and the second choke valve (12) in the low temperature water tank (8), by the first by-pass valve control (27) and two loops of the second by-pass valve control (28) switching.
5. according to the complementary heat pump type air conditioning system of claims 1 described multiple renewable energy sources, it is characterized in that: compressor (14) is invariable frequency compressor, or frequency-changeable compressor, use existing working medium commonly used, or novel environment-friendly refrigerant is done refrigerant.
6. according to the complementary heat pump type air conditioning system of claims 1 described multiple renewable energy sources, it is characterized in that: on low temperature water tank (8) and the middle reservoir (16) hot water feeding pipe's mouth and the moisturizing mouth of pipe are set.
7. according to the complementary heat pump type air conditioning system of claims 1 described multiple renewable energy sources, it is characterized in that: water circulating pump (19) is provided with bypass circulation, closes by the 3rd by-pass valve control (30) and the 4th by-pass valve control (33) control the logical of two loops.
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| CN103712371A (en) * | 2013-12-24 | 2014-04-09 | 上海理工大学 | Refrigerating and heating system |
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| CN106871483A (en) * | 2017-03-31 | 2017-06-20 | 武汉地质资源环境工业技术研究院有限公司 | A kind of Hydrogen Energy and the complementary heat pump of solar energy |
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| CN115307334A (en) * | 2022-08-08 | 2022-11-08 | 安徽工程大学 | Multi-heat-source heat pump air conditioning system and operation control method thereof |
| CN116697623A (en) * | 2023-05-30 | 2023-09-05 | 江苏省华扬太阳能有限公司 | Air source heat pump heating, hot water and refrigerating system with solar defrosting function and control method thereof |
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| CN115307334B (en) * | 2022-08-08 | 2024-01-26 | 安徽工程大学 | Multi-heat source heat pump air conditioning system and operation control method thereof |
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