CN112178750A - Novel solar air source heat pump system and hot water preparation method - Google Patents
Novel solar air source heat pump system and hot water preparation method Download PDFInfo
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- CN112178750A CN112178750A CN202011245046.1A CN202011245046A CN112178750A CN 112178750 A CN112178750 A CN 112178750A CN 202011245046 A CN202011245046 A CN 202011245046A CN 112178750 A CN112178750 A CN 112178750A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention belongs to the technical field of heating and heating, and particularly relates to a novel solar air source heat pump system which comprises a solar heat collector hot water circulation loop, an air source heat pump hot water circulation loop and a tap water pipeline, wherein the solar heat collector hot water circulation loop comprises a solar heat collector, a temperature sensor, a circulating water pump, a controller and a heat storage water tank, the air source heat pump hot water circulation loop comprises an evaporator, a compressor, a condenser, an expansion valve and a constant temperature water tank, the output end of the solar heat collector in the solar heat collector hot water circulation loop is connected with the input end of the heat storage water tank through a first pipeline, and the temperature sensor is correspondingly connected in the heat. Has the advantages that: the invention adopts the mode of combining the solar energy and the air source heat pump to prepare the hot water, relatively saves the energy consumption, can avoid the cross condition of the heating of the solar heat collector and the heating of the air source heat pump, namely can not additionally provide the energy loss when the temperature difference occurs.
Description
Technical Field
The invention relates to the technical field of heating, in particular to a novel solar air source heat pump system and a hot water preparation method.
Background
With the development of economy and the continuous improvement of the living standard of people, the proportion of domestic hot water is continuously increased in the rapidly-increased building energy consumption. At present, the domestic hot water is mainly prepared by an electric water heater, a gas water heater, a solar water heater and the like. Compared with the direct adoption of consumed electric energy, the utilization of the solar water heater has important significance for relieving energy shortage and utilizing renewable energy. Solar energy is used as energy to heat hot water, and the sun is used as green energy and widely applied to the fields of buildings and the like, but the application of the solar energy is easily influenced by weather, the temperature of the hot water produced by the solar energy is difficult to meet the requirements of users at night and in cloudy days, people usually adopt electric auxiliary heating or gas heating equipment for improvement, the equipment cost and the operation cost are high, and the control is inconvenient.
Solar energy and air source heat pump combine to form parallel system and to a great extent to be approved, but in winter because solar collector and air source heat pump efficiency all greatly reduced make the total efficiency of system reduce, the performance of system has been influenced, the water that tradition utilized solar energy and air source heat pump heating can mix together in addition, and then the condition of cross heating can appear when the difference appears in the temperature, the energy consumption of using has increased relatively, and when not using, the condition that the temperature descends can appear along with the spreading of time to the water in storage water tank and the thermostated container, need in time heat up and guarantee the needs of using, and the temperature of settlement need independent settlement according to actual conditions.
Therefore, we propose a novel solar air source heat pump system and a hot water preparation method to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a novel solar air source heat pump system and a hot water preparation method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the novel solar air source heat pump system comprises a solar heat collector hot water circulation loop, an air source heat pump hot water circulation loop and a tap water pipeline, wherein the solar heat collector hot water circulation loop comprises a solar heat collector, a temperature sensor, a circulating water pump, a controller and a heat storage water tank, the air source heat pump hot water circulation loop comprises an evaporator, a compressor, a condenser, an expansion valve and a constant temperature water tank, the output end of the solar heat collector in the solar heat collector hot water circulation loop is connected with the input end of the heat storage water tank through a first pipeline, the temperature sensor is correspondingly connected in the heat storage water tank, the controller is correspondingly arranged on the outer side wall of the heat storage water tank, the output end of the heat storage water tank is connected with the circulating water pump through a second pipeline, and the circulating water pump is connected with the solar heat; constitute a hot water circulation circuit between condenser and the constant temperature water tank in the air source heat pump hot water circulation circuit, by fourth pipe connection between the output of condenser and the expansion valve, by fifth pipe connection between the output of expansion valve and the evaporimeter, by sixth pipe connection between evaporimeter and the compressor, and by seventh pipe connection between the output of compressor and the condenser, by independent intercommunication pipe connection between heat storage water tank and the constant temperature water tank, be connected by same electric three-way valve between running water pipeline and heat storage water tank and the constant temperature water tank.
In the above novel solar air source heat pump system, a water level sensor is further arranged in the hot water storage tank, a temperature set value is set in the temperature sensor, an upper water level limit value and a lower water temperature limit value are set in the water level sensor, a temperature sensor and a water level sensor are also arranged in the constant temperature water tank, three set values of the temperature in the constant temperature water tank include a set value 1, a set value 2 and a set value 3, and the water level sensor also includes an upper water level limit value and a lower water level limit value.
In foretell novel solar air source heat pump system, be provided with heating cavity and heat preservation cavity in the heat storage water tank, and through violently managing the intercommunication between heating cavity and the heat preservation cavity, fixedly connected with temperature control valve on the lateral wall of violently managing, intercommunication pipeline's input and heat preservation cavity intercommunication, the heating cavity is connected with circulating water pump, fixedly connected with one-way control valve on the lateral wall of intercommunication pipeline, be provided with two in the constant temperature water tank and hold the cavity, the output and one of them hold the cavity intercommunication setting of intercommunication pipeline, and another condenser intercommunication setting in holding cavity and the air source heat pump hot water circulation return circuit, two the output that holds the cavity lets in to user's is indoor through two eighth pipelines.
In the above novel solar air source heat pump system, the tap water pipeline is connected with the input end of the electric three-way valve, and the output end of the electric three-way valve is connected with the heat storage water tank and the constant temperature water tank through water inlet pipelines.
In the above novel solar air source heat pump system, the two accommodating chambers of the constant temperature water tank are further provided with auxiliary electric heating devices, and the auxiliary electric heating devices are electrically connected with an external controller.
The novel hot water preparation method combining the solar energy and the air source heat pump is characterized by comprising the following steps of:
s1, directly supplying tap water to the heat storage water tank so that the tap water can be heated when the solar heat collector and the heat storage water tank are circulated;
s2, when the solar heat collector works in sunny days to generate hot water, the hot water is circulated between the heat storage water tank and the solar heat collector by using the circulating water pump to be heated continuously, and the water in the heating cavity in the heat storage water tank enters the heat preservation cavity when reaching the set temperature;
s3, when the water in the heat preservation cavity reaches the upper limit value of the water level, the redundant hot water is introduced into the accommodating cavity of the constant-temperature water tank, and the water in the accommodating cavity keeps constant temperature and is provided for a user;
s4, when sunlight is insufficient in the daytime and at night or in rainy days and the solar heat collector cannot supply enough hot water, the air source heat pump works to generate hot water to meet the requirement, tap water is supplemented into the constant-temperature water tank, the condenser and the constant-temperature water tank form a hot water circulation loop, the hot water is not heated for a short time, and the water temperature of the constant-temperature water tank is kept.
In the above novel method for preparing hot water by combining solar energy and air source heat pump, in step S4, when the solar thermal collector cannot work normally and cannot heat the water to the temperature required by the residents, the one-way control valve between the thermal storage water tank and the constant temperature water tank is closed, and the air source heat pump starts to work to heat the water to the set temperature of 3; when the solar heat collector can work normally and the water temperature in the heat storage water tank is heated to a set temperature, the air source heat pump stops running, and the solar heat collector supplies hot water; when the solar radiation is weakened and the temperature of the water heated by the solar heat collector is not enough to reach the required value, the temperature of the water in the constant-temperature water tank is reduced and is lower than a set value 1, and the air source heat pump starts to work.
In the above novel method for preparing hot water by combining a solar energy and an air source heat pump, the working steps of the hot water circulation loop formed by the condenser and the constant temperature water tank in step S4 are as follows:
1) the refrigerant is compressed into high-pressure high-temperature superheated gas in the compressor, enters the condenser and exchanges heat with water, and the water is heated to the required temperature;
2) the refrigerant after heat exchange enters a thermal expansion valve again, is subjected to isenthalpic pressure reduction, then enters an evaporator again, absorbs the heat of air and is evaporated into a gas state, and finally enters a compressor to complete the whole cycle.
Compared with the prior art, the novel solar air source heat pump system and the hot water preparation method have the advantages that:
1. the invention adopts the mode of combining the solar energy and the air source heat pump to prepare the hot water, relatively saves the energy consumption, and further can avoid the crossing condition of the heating of the solar heat collector and the heating of the air source heat pump by respectively arranging two groups of independent chambers in the heat storage water tank and the constant temperature water tank, namely the loss of additionally providing energy when the temperature difference occurs can not be caused.
2. According to the invention, three set values including a set value 1, a set value 2 and a set value 3 are set for the temperature in the constant-temperature water tank, and the air source heat pump works to heat water to the set temperature 3; when the solar heat collector can work normally and the water temperature in the heat storage water tank is heated to a set temperature, the air source heat pump stops running, and the solar heat collector supplies hot water; when the solar radiation is weakened and the water temperature heated by the solar heat collector is not enough to reach the required value, the water temperature in the constant-temperature water tank can be reduced, and when the water temperature is lower than the set value 1, the air source heat pump starts to work, so that the energy loss is relatively saved.
Drawings
Fig. 1 is a system structural diagram of a first embodiment of a novel solar air source heat pump system and a hot water preparation method according to the present invention;
fig. 2 is a system structural diagram of a second embodiment of the novel solar air source heat pump system and the hot water preparation method according to the present invention;
fig. 3 is a method structure diagram of the novel solar air source heat pump system and the hot water preparation method according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1-2, the novel solar air source heat pump system comprises a solar heat collector hot water circulation loop, an air source heat pump hot water circulation loop and a tap water pipeline, wherein the solar heat collector hot water circulation loop comprises a solar heat collector, a temperature sensor, a circulating water pump, a controller and a heat storage water tank, the air source heat pump hot water circulation loop comprises an evaporator, a compressor, a condenser, an expansion valve and a constant temperature water tank, an output end of the solar heat collector in the solar heat collector hot water circulation loop is connected with an input end of the heat storage water tank through a first pipeline, the temperature sensor is correspondingly connected in the heat storage water tank, the controller is correspondingly arranged on the outer side wall of the heat storage water tank, an output end of the heat storage water tank is connected with the circulating water pump through a second pipeline, and; a hot water circulation loop is formed between a condenser and a constant temperature water tank in the hot water circulation loop of the air source heat pump, the output end of the condenser is connected with an expansion valve through a fourth pipeline, the output end of the expansion valve is connected with an evaporator through a fifth pipeline, the evaporator is connected with a compressor through a sixth pipeline, the output end of the compressor is connected with the condenser through a seventh pipeline, a heat storage water tank is connected with the constant temperature water tank through an independent communicating pipeline, and a tap water pipeline is connected with the heat storage water tank and the constant temperature water tank through a same electric three-way valve.
The constant-temperature water tank is also provided with a temperature sensor, the temperature sensor is internally provided with a temperature set value, the water level sensor is internally provided with a water level upper limit value and a water level lower limit value, the constant-temperature water tank is also provided with a temperature sensor and a water level sensor, the three set values of the temperature in the constant-temperature water tank comprise a set value 1, a set value 2 and a set value 3, and the water level sensor also comprises a water level upper limit value and a water level lower limit value.
Wherein, be provided with heating cavity and heat preservation cavity in the heat storage water tank, and through violently managing the intercommunication between heating cavity and the heat preservation cavity, fixedly connected with temperature control valve on the lateral wall of violently managing, the input and the heat preservation cavity intercommunication of intercommunication pipeline, the heating cavity is connected with circulating water pump, fixedly connected with one-way control valve on the lateral wall of intercommunication pipeline, be provided with two in the constant temperature water tank and hold the cavity, the output and one of them holding cavity intercommunication setting of intercommunication pipeline, and another holds the condenser intercommunication setting in cavity and the air source heat pump hot water circulation return circuit, two outputs that hold the cavity let in to user's indoor through two eighth pipelines.
Furthermore, the tap water pipeline is connected with the input end of the electric three-way valve, and the output end of the electric three-way valve is connected with the heat storage water tank and the constant temperature water tank through a water inlet pipeline.
Example two
With reference to FIGS. 1 and 3
Compared with the first embodiment, the novel solar air source heat pump system has the following technical characteristics: two of constant temperature water tank hold still to be provided with supplementary electric heater unit in the cavity, and supplementary electric heater unit and outside controller electric connection, when winter or the microthermal situation that appears, air source heat pump can frosting, and unable normal work, supplementary electric heater unit will work, guarantees resident normal use hot water. The system is standby besides the heat pump which is normally used, and the situation that the hot water cannot be normally supplied when the heat pump fails in work is prevented.
The novel hot water preparation method combining the solar energy and the air source heat pump comprises the following steps:
s1, directly supplying tap water to the heat storage water tank so that the tap water can be heated when the solar heat collector and the heat storage water tank are circulated;
s2, when the solar heat collector works in sunny days to generate hot water, the hot water is circulated between the heat storage water tank and the solar heat collector by using the circulating water pump to be heated continuously, and the water in the heating cavity in the heat storage water tank enters the heat preservation cavity when reaching the set temperature;
s3, when the water in the heat preservation cavity reaches the upper limit value of the water level, the redundant hot water is introduced into the accommodating cavity of the constant-temperature water tank, and the water in the accommodating cavity keeps constant temperature and is provided for a user;
s4, when sunlight is insufficient in the daytime and at night or in rainy days and the solar heat collector cannot supply enough hot water, the air source heat pump works to generate hot water to meet the requirement, tap water is supplemented into the constant-temperature water tank, the condenser and the constant-temperature water tank form a hot water circulation loop, the hot water is not heated for a short time, and the water temperature of the constant-temperature water tank is kept.
In step S4, when the solar thermal collector cannot work normally and cannot heat the water to the temperature required by the residents, the one-way control valve between the heat storage water tank and the constant temperature water tank is closed, and the air source heat pump starts to work to heat the water to the set temperature of 3; when the solar heat collector can work normally and the water temperature in the heat storage water tank is heated to a set temperature, the air source heat pump stops running, and the solar heat collector supplies hot water; when the solar radiation is weakened and the temperature of the water heated by the solar heat collector is not enough to reach the required value, the temperature of the water in the constant-temperature water tank is reduced and is lower than a set value 1, and the air source heat pump starts to work.
Wherein, the working steps of the hot water circulation loop formed by the condenser and the constant temperature water tank in the step S4 are as follows:
1) the refrigerant is compressed into high-pressure high-temperature superheated gas in the compressor, enters the condenser and exchanges heat with water, and the water is heated to the required temperature;
2) the refrigerant after heat exchange enters a thermal expansion valve again, is subjected to isenthalpic pressure reduction, then enters an evaporator again, absorbs the heat of air and is evaporated into a gas state, and finally enters a compressor to complete the whole cycle.
Further, a water level sensor in the hot water storage tank is mainly used for: when the water level in the heat storage water tank is lower than a set value, automatically adding water into tap water; and the temperature sensor in the hot water storage tank is used for: when the solar heat collector heats the water in the heat storage water tank to a set temperature value, a one-way control valve between the heat storage water tank and the constant temperature water tank is opened, and the water in the heat storage water tank flows into the constant temperature water tank; the temperature sensor in the thermostated water tank is used for: when the water in the constant-temperature water tank is lower than a set value 1, the air source heat pump operates to heat the water in the constant-temperature water tank to a set value 3 so as to keep the water temperature of the constant-temperature water tank constant; when the water in the constant temperature water tank is lower than the set value 2, the electric heater in the constant temperature water tank works to directly heat the water in the constant temperature water tank to the set value 3, and the water temperature is maintained.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The novel solar air source heat pump system comprises a solar heat collector hot water circulation loop, an air source heat pump hot water circulation loop and a tap water pipeline, the hot water circulation loop of the solar heat collector comprises the solar heat collector, a temperature sensor, a circulating water pump, a controller and a hot water storage tank, the hot water circulation loop of the air source heat pump comprises an evaporator, a compressor, a condenser, an expansion valve and a constant temperature water tank, it is characterized in that the output end of the solar heat collector in the solar heat collector hot water circulation loop is connected with the input end of the heat storage water tank through a first pipeline, the temperature sensor is correspondingly connected in the heat storage water tank, the controller is correspondingly arranged on the outer side wall of the heat storage water tank, the output end of the heat storage water tank is connected with the circulating water pump through a second pipeline, and the circulating water pump is connected with the solar heat collector through a third pipeline; constitute a hot water circulation circuit between condenser and the constant temperature water tank in the air source heat pump hot water circulation circuit, by fourth pipe connection between the output of condenser and the expansion valve, by fifth pipe connection between the output of expansion valve and the evaporimeter, by sixth pipe connection between evaporimeter and the compressor, and by seventh pipe connection between the output of compressor and the condenser, by independent intercommunication pipe connection between heat storage water tank and the constant temperature water tank, be connected by same electric three-way valve between running water pipeline and heat storage water tank and the constant temperature water tank.
2. The novel solar air source heat pump system as claimed in claim 1, wherein a water level sensor is further disposed in the hot water storage tank, a temperature set value is set in the temperature sensor, an upper water level limit value and a lower water temperature limit value are set in the water level sensor, a temperature sensor and a water level sensor are also disposed in the constant temperature water tank, three set values of the temperature in the constant temperature water tank include a set value 1, a set value 2 and a set value 3, and the water level sensor also includes an upper water level limit value and a lower water level limit value.
3. The novel solar air source heat pump system according to claim 2, wherein a heating chamber and a heat preservation chamber are arranged in the heat storage water tank, the heating chamber and the heat preservation chamber are communicated with each other through a transverse pipe, a temperature control valve is fixedly connected to the side wall of the transverse pipe, the input end of the communicating pipe is communicated with the heat preservation chamber, the heating chamber is connected with a circulating water pump, a one-way control valve is fixedly connected to the outer side wall of the communicating pipe, two accommodating chambers are arranged in the constant temperature water tank, the output end of the communicating pipe is communicated with one of the accommodating chambers, the other accommodating chamber is communicated with a condenser in an air source heat pump hot water circulation loop, and the output ends of the two accommodating chambers are led into a user's room through two eighth pipes.
4. The novel solar air source heat pump system as claimed in claim 2, wherein the tap water pipeline is connected with the input end of the electric three-way valve, and the output end of the electric three-way valve is connected with the heat storage water tank and the constant temperature water tank through water inlet pipelines.
5. The novel solar air source heat pump system as claimed in claim 1, wherein auxiliary electric heating devices are further arranged in the two accommodating cavities of the constant-temperature water tank, and the auxiliary electric heating devices are electrically connected with an external controller.
6. The novel hot water preparation method combining the solar energy and the air source heat pump is characterized by comprising the following steps of:
s1, directly supplying tap water to the heat storage water tank so that the tap water can be heated when the solar heat collector and the heat storage water tank are circulated;
s2, when the solar heat collector works in sunny days to generate hot water, the hot water is circulated between the heat storage water tank and the solar heat collector by using the circulating water pump to be heated continuously, and the water in the heating cavity in the heat storage water tank enters the heat preservation cavity when reaching the set temperature;
s3, when the water in the heat preservation cavity reaches the upper limit value of the water level, the redundant hot water is introduced into the accommodating cavity of the constant-temperature water tank, and the water in the accommodating cavity keeps constant temperature and is provided for a user;
s4, when sunlight is insufficient in the daytime and at night or in rainy days and the solar heat collector cannot supply enough hot water, the air source heat pump works to generate hot water to meet the requirement, tap water is supplemented into the constant-temperature water tank, the condenser and the constant-temperature water tank form a hot water circulation loop, the hot water is not heated for a short time, and the water temperature of the constant-temperature water tank is kept.
7. The method for preparing hot water by combining a solar energy and an air source heat pump as claimed in claim 5, wherein in step S4, when the solar heat collector fails to work normally and can not heat the water to the temperature required by the residents, the one-way control valve between the hot water storage tank and the constant temperature water tank is closed, and the air source heat pump starts to work to heat the water to the set temperature of 3; when the solar heat collector can work normally and the water temperature in the heat storage water tank is heated to a set temperature, the air source heat pump stops running, and the solar heat collector supplies hot water; when the solar radiation is weakened and the temperature of the water heated by the solar heat collector is not enough to reach the required value, the temperature of the water in the constant-temperature water tank is reduced and is lower than a set value 1, and the air source heat pump starts to work.
8. The novel solar energy and air source heat pump combined hot water preparation method as claimed in claim 5, wherein the working steps of forming the hot water circulation loop by the condenser and the constant temperature water tank in the step S4 are as follows:
1) the refrigerant is compressed into high-pressure high-temperature superheated gas in the compressor, enters the condenser and exchanges heat with water, and the water is heated to the required temperature;
2) the refrigerant after heat exchange enters a thermal expansion valve again, is subjected to isenthalpic pressure reduction, then enters an evaporator again, absorbs the heat of air and is evaporated into a gas state, and finally enters a compressor to complete the whole cycle.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587203A (en) * | 2021-07-23 | 2021-11-02 | 西安石油大学 | Multi-module combined control solar-heat pump composite heat collection system based on PLC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113587203A (en) * | 2021-07-23 | 2021-11-02 | 西安石油大学 | Multi-module combined control solar-heat pump composite heat collection system based on PLC |
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