CN115127167B - Solar water heating and air conditioning integrated system, control method thereof and air conditioner - Google Patents
Solar water heating and air conditioning integrated system, control method thereof and air conditioner Download PDFInfo
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- CN115127167B CN115127167B CN202211050903.1A CN202211050903A CN115127167B CN 115127167 B CN115127167 B CN 115127167B CN 202211050903 A CN202211050903 A CN 202211050903A CN 115127167 B CN115127167 B CN 115127167B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/272—Solar heating or cooling
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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Abstract
The embodiment of the invention provides a solar hot water and air conditioner integrated system, a control method thereof and an air conditioner. The solar hot water and air conditioning integrated system comprises a solar hot water system and an air conditioning system; the air conditioning system includes: the system comprises a compressor, a four-way valve, an intermediate heat exchanger, an outdoor heat exchanger, an indoor unit, a first electromagnetic valve, a second electromagnetic valve, a first differential pressure one-way valve and a second differential pressure one-way valve; the first electromagnetic valve is connected with the intermediate heat exchanger in series and then connected with the indoor unit in parallel; the second electromagnetic valve is connected with the intermediate heat exchanger in series and then connected with the outdoor heat exchanger in parallel; the first differential pressure one-way valve is arranged between the four-way valve and the outdoor heat exchanger; the intermediate heat exchanger can exchange heat with the solar water heating system. The invention solves the technical problem that the solar energy and the air conditioning system are independent systems and can not meet the requirements of refrigeration, heating and hot water production.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a solar hot water and air conditioner integrated system, a control method thereof and an air conditioner.
Background
Along with the improvement of living standard, an air conditioning system and a solar water heating system become necessary articles for life; however, at present, the solar energy and the air conditioning system are independent systems, and the requirements of refrigeration, heating and hot water heating cannot be considered through one system device, so that the complementation of the solar energy and the electric energy is realized. The condensation heat generated by the outdoor heat exchanger of the air conditioner is usually directly discharged into the atmosphere, so that the energy is greatly wasted; the existing heat recovery system has high cost, complex application and low market acceptance.
Disclosure of Invention
In order to solve the problems that the solar energy and the air conditioning system are independent systems and the requirements of refrigeration, heating and hot water production cannot be met by one system device, the invention provides a solar energy hot water and air conditioning integrated system, which comprises a solar energy hot water system and an air conditioning system; the air conditioning system includes: the system comprises a compressor, a four-way valve, an intermediate heat exchanger, an outdoor heat exchanger, an indoor unit, a first electromagnetic valve, a second electromagnetic valve, a first differential pressure one-way valve and a second differential pressure one-way valve; the first electromagnetic valve is connected with the intermediate heat exchanger in series and then connected with the indoor unit in parallel; the second electromagnetic valve is connected with the intermediate heat exchanger in series and then connected with the outdoor heat exchanger in parallel; the first differential pressure one-way valve is arranged between the four-way valve and the outdoor heat exchanger, and the second differential pressure one-way valve is arranged between the four-way valve and the intermediate heat exchanger; the intermediate heat exchanger can exchange heat with the solar water heating system.
The technical effect achieved after the technical scheme is adopted is as follows: the intermediate heat exchanger capable of exchanging heat with the solar water heating system is additionally arranged on the air conditioning system, so that heat exchange can be carried out between the solar system and the air conditioning system, the domestic hot water can be prepared by utilizing condensation heat generated by the air conditioning system, and the effect of saving energy is achieved. The first pressure difference one-way valve is arranged between the four-way valve and the outdoor heat exchanger, and the second pressure difference one-way valve is arranged between the four-way valve and the intermediate heat exchanger, so that the on-off mode of the first pressure difference one-way valve and the second pressure difference one-way valve can be controlled according to the running state of the air conditioning system, the heat exchange circulation flow path of the refrigerant in the air conditioning system is adjusted, and the indoor refrigeration requirement, the indoor heating requirement and the domestic hot water requirement are met.
In this technical scheme, solar water heating system includes: the solar heat collector, the circulating pump and the heat collecting water tank; wherein the intermediate heat exchanger is capable of exchanging heat with the heat collecting water tank.
The technical effect achieved after the technical scheme is adopted is as follows: the solar heat collector can collect solar energy, and the cold water in the heat collecting water tank is heated by the solar energy; the circulating pump can pump the water in the heat collecting water tank into the solar heat collector to maintain the circulating operation of the solar energy system. Because the intermediate heat exchanger can exchange heat with the heat collection water tank, when the refrigerant enters the intermediate heat exchanger for condensation and heat dissipation, water in the heat collection water tank can be heated to prepare domestic hot water.
The technical scheme provides a control method of a solar water heating and air conditioning integrated system, which is used for controlling the solar water heating and air conditioning integrated system in any one of the previous items, and the control method of the solar water heating and air conditioning integrated system comprises the following steps: the solar hot water and air conditioning integrated system performs refrigeration operation; receiving a hot water making instruction; acquiring a pressure value of the intermediate heat exchanger in real time; and controlling the on-off of the first differential pressure one-way valve according to the magnitude relation between the pressure value and the first pressure threshold value.
The technical effect achieved after the technical scheme is adopted is as follows: when the conventional air conditioning system operates in a refrigerating mode, the indoor unit is used as an evaporator to evaporate and absorb heat, the outdoor unit is used as a condenser to condense and dissipate heat, and heat generated by condensation of a refrigerant in the condenser is directly discharged to the outdoor environment from the outdoor heat exchanger, so that a large amount of heat is wasted. When the solar water heating and air conditioning integrated system in the application operates in a refrigerating mode, if a hot water making instruction is received, a refrigerating circulation loop of the air conditioning system is adjusted, the outdoor heat exchanger is closed, the indoor unit serves as an evaporator, the intermediate heat exchanger serves as a condenser, and water in the heat collecting water tank is heated by utilizing heat generated by condensation of a refrigerant in the intermediate heat exchanger. It can be understood that, as the temperature of the water in the heat collecting water tank gradually rises, the temperature difference between the intermediate heat exchanger and the heat collecting water tank becomes smaller and smaller, and when the temperature of the water in the water tank is too high, the condensation effect of the intermediate heat exchanger becomes worse, and the refrigeration effect of the indoor unit is influenced. Through the pressure value that acquires middle heat exchanger, can judge the condensation ability of heat exchanger in the middle of the present according to the big or small relation of the pressure value of middle heat exchanger and first pressure threshold value to can control the break-make of first pressure differential check valve according to the condensation ability of heat exchanger in the middle of the present, in order to guarantee the refrigeration effect of indoor set.
In this technical solution, the controlling the on/off of the first differential pressure check valve according to the magnitude relationship between the pressure value and the first pressure threshold includes: if the pressure value is smaller than the first pressure threshold value, closing the first differential pressure one-way valve to enable the refrigerant discharged by the compressor to enter the intermediate heat exchanger for condensation and heat dissipation, and enabling the condensed refrigerant to enter the indoor unit for evaporation and refrigeration; and/or if the pressure value is larger than or equal to a first pressure threshold value, starting the first differential pressure one-way valve to enable the four-way valve to be communicated with the outdoor heat exchanger, wherein one part of the refrigerant discharged by the compressor enters the intermediate heat exchanger for condensation, and the other part of the refrigerant enters the outdoor heat exchanger for condensation.
The technical effect achieved after the technical scheme is adopted is as follows: if the pressure value of the intermediate heat exchanger is smaller than the first pressure threshold value, the condensing capacity of the current intermediate heat exchanger can meet the refrigerating requirement of the indoor unit, the outdoor heat exchanger does not need to be opened to adjust the refrigerating circulation loop, so that the first pressure difference one-way valve is closed, the refrigerant discharged by the compressor enters the intermediate heat exchanger to be condensed and radiated, the condensed refrigerant enters the indoor unit to be evaporated and refrigerated, the water in the water collecting tank is heated by utilizing the condensing heat generated by the intermediate heat exchanger while the refrigerating effect of the indoor unit is met, and the utilization rate of energy can be improved. If the pressure value of the intermediate heat exchanger is greater than or equal to the first pressure threshold value, it is indicated that the condensation capacity of the current intermediate heat exchanger cannot meet the refrigeration requirement of the indoor unit, and therefore the first pressure difference one-way valve needs to be opened to change a refrigeration cycle loop of the air conditioning system, so that part of the refrigerant discharged by the compressor enters the intermediate heat exchanger for condensation, and the other part of the refrigerant enters the outdoor heat exchanger for condensation, and then the condensation capacity of the air conditioning system is improved in a double-condenser mode, and the refrigeration requirement of the indoor unit is met.
In this technical solution, the control method of the solar hot water and air conditioning integrated system further includes: the solar hot water and air conditioner integrated system performs heating operation; receiving a hot water making instruction; acquiring the high-pressure of the air conditioning system in real time; and controlling the on-off of the second differential pressure one-way valve according to the magnitude relation between the high pressure and a second pressure threshold.
The technical effect achieved after the technical scheme is adopted is as follows: when the solar hot water and air conditioner integrated system is in heating operation, the indoor unit condenses and dissipates heat for the condenser, and the outdoor unit evaporates and absorbs heat for the evaporator. When a hot water heating instruction is received, the high-pressure of the air conditioning system is acquired, the heating requirement of the current indoor unit can be judged according to the magnitude relation between the high-pressure of the air conditioning system and the second pressure threshold value, so that the on-off of the second pressure difference check valve is controlled according to the heating requirement of the indoor unit, the heating circulation loop of the solar hot water and air conditioning integrated system is adjusted, and when the heating effect of the indoor unit is met, the condensation heat generated by the air conditioning system is utilized to assist in improving the hot water heating capacity, and the system energy efficiency is improved.
In this technical solution, the controlling the on/off of the second differential pressure check valve according to the magnitude relationship between the high pressure and the second pressure threshold includes: if the high-pressure is smaller than a second pressure threshold value, closing the second differential pressure one-way valve to enable the refrigerant discharged by the compressor to enter the indoor unit for condensation and heating, and enabling the condensed refrigerant to enter the outdoor heat exchanger for evaporation and heat absorption; and/or if the high-pressure is greater than or equal to the second pressure threshold value, opening the second differential pressure one-way valve to enable the four-way valve to be communicated with the intermediate heat exchanger, enabling one part of the refrigerant discharged by the compressor to enter the indoor unit for condensation, and enabling the other part of the refrigerant to enter the intermediate heat exchanger for condensation.
The technical effect achieved after the technical scheme is adopted is as follows: if the high-pressure of the air conditioning system is smaller than the second pressure threshold value, it is indicated that the heating requirement of the current indoor unit is large, and if part of refrigerant gas discharged by the compressor enters the intermediate heat exchanger for condensation, the heating requirement of the indoor unit cannot be met, the heating effect of the indoor unit is affected, and the heating comfort of a user is affected, so that the second pressure difference check valve needs to be closed to ensure that all the refrigerant discharged by the compressor enters the indoor unit for condensation and heating. Meanwhile, the solar energy collected by the solar heat collector is utilized to heat the water in the heat collecting water tank, so as to prepare domestic hot water. If the high-pressure of the air-conditioning system is greater than or equal to the second pressure threshold, it is indicated that the heating demand of the current indoor unit is low, so that the second differential pressure one-way valve can be opened to adjust a heating circulation loop of the air-conditioning system, the four-way valve is communicated with the intermediate heat exchanger, a part of refrigerant discharged by the compressor enters the indoor unit to be condensed for indoor heating, and the other part of refrigerant enters the intermediate heat exchanger to be condensed for heating water, so that the heating water capacity is improved in an auxiliary manner, and the system energy efficiency is improved.
In this technical solution, after the second differential pressure check valve is opened, the closing condition of the second differential pressure check valve is: the high pressure is less than a third pressure threshold; wherein the third pressure threshold is less than the second pressure threshold.
The technical effect achieved after the technical scheme is adopted is as follows: after the second differential pressure check valve is opened, the condition that the second differential pressure check valve is closed is set to be that the high-pressure is smaller than the third pressure threshold, and the third pressure threshold is smaller than the second pressure threshold, so that the heating requirement of the indoor unit can be ensured.
In this technical solution, the control method of the solar hot water and air conditioning integrated system further includes: and when the solar hot water and air conditioning integrated system does not need to produce hot water, closing the first electromagnetic valve and the second electromagnetic valve.
The technical effect achieved after the technical scheme is adopted is as follows: when the solar hot water and air conditioning integrated system does not need to produce hot water, the air conditioning system can be operated according to a conventional mode by closing the first electromagnetic valve and the second electromagnetic valve.
The technical scheme provides an air conditioner, which comprises the solar hot water and air conditioning integrated system according to any one of the preceding technical schemes, a computer readable storage medium storing a computer program, and a processor, wherein the computer program is read by the processor and is executed to realize the control method of the solar hot water and air conditioning integrated system according to any one of the preceding technical schemes.
In summary, the above technical solutions of the present application may have one or more of the following advantages or beneficial effects:
(1) The intermediate heat exchanger capable of exchanging heat with the solar water heating system is additionally arranged on the air conditioning system, so that heat exchange can be carried out between the solar system and the air conditioning system, the domestic hot water can be prepared by utilizing condensation heat generated by the air conditioning system, and the effect of saving energy is achieved. The first pressure difference one-way valve is arranged between the four-way valve and the outdoor heat exchanger, and the second pressure difference one-way valve is arranged between the four-way valve and the intermediate heat exchanger, so that the on-off mode of the first pressure difference one-way valve and the second pressure difference one-way valve can be controlled according to the running state of the air conditioning system, the heat exchange circulation flow path of the refrigerant in the air conditioning system is adjusted, and the indoor refrigeration requirement, the indoor heating requirement and the domestic hot water requirement are met.
(2) The solar heat collector can collect solar energy, and the cold water in the heat collecting water tank is heated by the solar energy; the circulating pump can pump the water in the heat collecting water tank into the solar heat collector to maintain the circulating operation of the solar energy system. Because the intermediate heat exchanger can exchange heat with the heat collection water tank, when the refrigerant enters the intermediate heat exchanger for condensation and heat dissipation, water in the heat collection water tank can be heated to prepare domestic hot water.
(3) When a conventional air conditioning system operates in a refrigerating mode, the indoor unit is used as an evaporator to evaporate and absorb heat, the outdoor unit is used as a condenser to condense and dissipate heat, and heat generated by condensation of a refrigerant in the condenser is directly discharged to the outdoor environment from the outdoor heat exchanger, so that a large amount of heat waste is caused. When the solar water heating and air conditioning integrated system in the application operates in a refrigerating mode, if a hot water making instruction is received, a refrigerating circulation loop of the air conditioning system is adjusted, the outdoor heat exchanger is closed, the indoor unit serves as an evaporator, the intermediate heat exchanger serves as a condenser, and water in the heat collecting water tank is heated by utilizing heat generated by condensation of a refrigerant in the intermediate heat exchanger. It can be understood that, as the water temperature in the heat collecting water tank gradually rises, the temperature difference between the intermediate heat exchanger and the heat collecting water tank is smaller and smaller, and when the water temperature in the water tank is too high, the condensation effect of the intermediate heat exchanger is deteriorated, and the refrigeration effect of the indoor unit is influenced. Through the pressure value that acquires middle heat exchanger, can judge the condensation ability of current middle heat exchanger according to the big or small relation of the pressure value of middle heat exchanger and first pressure threshold value to can control the break-make of first pressure differential check valve according to the condensation ability of current middle heat exchanger, in order to guarantee the refrigeration effect of indoor set.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts;
fig. 1 is a schematic structural diagram of an integrated system of solar hot water and air conditioner provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a refrigeration cycle loop when a middle heat exchanger of the solar water heating and air conditioning integrated system has a good condensation effect;
FIG. 3 is a schematic diagram of a refrigeration cycle loop when the condensing effect of an intermediate heat exchanger of the solar water heating and air conditioning integrated system is poor;
FIG. 4 is a schematic view of a heating cycle loop when the indoor heating effect of the solar hot water and air conditioning integrated system is not satisfied;
fig. 5 is a schematic diagram of a heating circulation loop when the indoor heating effect of the solar water heating and air conditioning integrated system is satisfied.
Description reference numbers indicate:
1. a solar heat collector; 2. a heat collecting water tank; 3. a circulation pump; 10. a compressor; 20. a four-way valve; 30. an intermediate heat exchanger; 40. an outdoor heat exchanger; 50. an indoor unit; 61. a first solenoid valve; 62. a second solenoid valve; 71. a first differential pressure check valve; 72. a second differential pressure check valve; 81. an outdoor electronic expansion valve; 82. indoor electronic expansion valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, a schematic structural diagram of a solar hot water and air conditioning integrated system according to a first embodiment of the present invention is shown. The solar hot water and air conditioning integrated system comprises: solar water heating system and air conditioning system. Wherein, the air conditioning system includes: a compressor 10, a four-way valve 20, an intermediate heat exchanger 30, an outdoor heat exchanger 40, an indoor unit 50, a first solenoid valve 61, a second solenoid valve 62, a first differential pressure check valve 71, and a second differential pressure check valve 72; the first electromagnetic valve 61 is connected in series with the intermediate heat exchanger 30 and then connected in parallel with the indoor unit 50; the second electromagnetic valve 62 is connected in series with the intermediate heat exchanger 30 and then connected in parallel with the outdoor heat exchanger 40; a first differential pressure check valve 71 is disposed between the four-way valve 20 and the outdoor heat exchanger 40, and a second differential pressure check valve 72 is disposed between the four-way valve 20 and the intermediate heat exchanger 30; the intermediate heat exchanger 30 can exchange heat with the solar water heating system; the air conditioning system further includes: an outdoor electronic expansion valve 81 and an indoor electronic expansion valve 82.
It can be understood that the intermediate heat exchanger 30 capable of exchanging heat with the solar water heating system is additionally arranged on the air conditioning system, so that heat exchange can be carried out between the solar system and the air conditioning system, the domestic hot water can be prepared by utilizing condensation heat generated by the air conditioning system, and the effect of saving energy is achieved. By arranging the first differential pressure check valve 71 between the four-way valve 20 and the outdoor heat exchanger 40 and arranging the second differential pressure check valve 72 between the four-way valve 20 and the intermediate heat exchanger 30, the on-off mode of the first differential pressure check valve 71 and the second differential pressure check valve 72 can be controlled according to the running state of the air conditioning system, so that the heat exchange circulation flow path of the refrigerant in the air conditioning system is adjusted, and the indoor refrigeration requirement, the indoor heating requirement and the domestic hot water requirement are met.
Further, the solar water heating system includes: the solar heat collector 1, the heat collecting water tank 2 and the circulating pump 3; wherein the intermediate heat exchanger 30 can exchange heat with the heat collecting water tank 2.
It can be understood that the solar heat collector 1 can collect solar energy, and the cold water in the heat collecting water tank 2 is heated by the solar energy; the circulating pump 3 can pump the water in the heat collecting water tank 2 into the solar heat collector 1 to maintain the circulating operation of the solar system. Because the intermediate heat exchanger 30 can exchange heat with the heat collecting water tank 2, when the refrigerant enters the intermediate heat exchanger 30 for condensation and heat dissipation, the water in the heat collecting water tank 2 can be heated to prepare domestic hot water.
[ second embodiment ]
With reference to fig. 2 to 5, a second embodiment of the present invention provides a control method of a solar hot-water and air-conditioning integrated system, which is used for controlling the solar hot-water and air-conditioning integrated system according to any one of the previous items, and the control method of the solar hot-water and air-conditioning integrated system includes: the solar hot water and air conditioning integrated system performs refrigeration operation; receiving a hot water making instruction; acquiring the pressure value of the intermediate heat exchanger 30 in real time; and controlling the on-off of the first differential pressure one-way valve 71 according to the magnitude relation between the pressure value and the first pressure threshold value.
It can be understood that when the conventional air conditioning system operates in a cooling mode, the indoor unit 50 serves as an evaporator to absorb heat by evaporation, the outdoor heat exchanger 40 serves as a condenser to dissipate heat by condensation, and heat generated by condensation of the refrigerant in the condenser is directly discharged from the outdoor heat exchanger 40 to the outdoor environment, which results in a great deal of heat waste. When the solar water heating and air conditioning integrated system in the application operates in a cooling mode, if a hot water heating instruction is received, a cooling circulation loop of the air conditioning system is adjusted, the outdoor heat exchanger 40 is closed, the indoor unit 50 serves as an evaporator, the intermediate heat exchanger 30 serves as a condenser, and water in the heat collecting water tank 2 is heated by heat generated by condensation of a refrigerant in the intermediate heat exchanger 30. It can be understood that, as the temperature of the water in the heat collecting water tank 2 gradually increases, the temperature difference between the intermediate heat exchanger 30 and the heat collecting water tank 2 becomes smaller and smaller, and when the temperature of the water in the heat collecting water tank 2 is too high, the condensation effect of the intermediate heat exchanger 30 becomes worse, and the refrigeration effect of the indoor unit 50 is affected. By acquiring the pressure value of the intermediate heat exchanger 30, the condensation capacity of the current intermediate heat exchanger 30 can be determined according to the magnitude relation between the pressure value of the intermediate heat exchanger 30 and the first pressure threshold, so that the on-off of the first differential pressure check valve 71 can be controlled according to the condensation capacity of the current intermediate heat exchanger 30, and the refrigeration effect of the indoor unit 50 can be ensured.
Further, the controlling the on/off of the first differential pressure check valve 71 according to the magnitude relation between the pressure value and the first pressure threshold value includes: if the pressure value is smaller than the first pressure threshold value, closing the first differential pressure one-way valve 71, and opening the second electromagnetic valve 62, so that the refrigerant discharged from the compressor 10 enters the intermediate heat exchanger 30 to be condensed and radiated, and the condensed refrigerant enters the indoor unit 50 to be evaporated and refrigerated; if the pressure value is greater than or equal to the first pressure threshold value, the first differential pressure check valve 71 is opened to communicate the four-way valve 20 with the outdoor heat exchanger 40, and a part of the refrigerant discharged from the compressor 10 enters the intermediate heat exchanger 30 to be condensed, and the other part of the refrigerant enters the outdoor heat exchanger 40 to be condensed. Wherein, the first pressure difference threshold value is preferably 32bar, and the value range is 30bar-33bar.
It can be understood that, if the pressure value of the intermediate heat exchanger 30 is smaller than the first pressure threshold, it indicates that the condensation capacity of the intermediate heat exchanger 30 can meet the refrigeration requirement of the indoor unit 50 at present, the outdoor heat exchanger 40 does not need to be opened to adjust the refrigeration cycle loop, so the first pressure difference check valve 71 is closed, the second electromagnetic valve 62 is opened, so that the refrigerant discharged from the compressor 10 enters the intermediate heat exchanger 30 to be condensed and radiated, the condensed refrigerant enters the indoor unit 50 to be evaporated and refrigerated, and thus the condensation heat generated by the intermediate heat exchanger 30 is utilized to heat the water in the hot water collecting tank 2 while the refrigeration effect of the indoor unit 50 is met, and further the utilization rate of energy can be improved. If the pressure value of the intermediate heat exchanger 30 is greater than or equal to the first pressure threshold, it indicates that the condensing capacity of the intermediate heat exchanger 30 cannot meet the refrigeration requirement of the indoor unit 50, and therefore the first differential pressure check valve 71 needs to be opened to change the refrigeration cycle loop of the air conditioning system, so that a part of the refrigerant discharged by the compressor 10 enters the intermediate heat exchanger 30 for condensation, and a part of the refrigerant enters the outdoor heat exchanger 40 for condensation, and the condensing capacity of the air conditioning system is further improved by means of the double condensers, so as to meet the refrigeration requirement of the indoor unit 50.
Further, the control method of the solar hot water and air conditioning integrated system further comprises the following steps: the solar hot water and air conditioner integrated system performs heating operation; receiving a hot water making instruction; acquiring the high-pressure of the air conditioning system in real time; and controlling the on-off of the second differential pressure one-way valve 72 according to the magnitude relation between the high pressure and the second pressure threshold.
It can be understood that, when the solar hot water and air conditioning integrated system performs heating operation, the indoor unit 50 performs condensation heat dissipation for the condenser, and the outdoor unit performs evaporation heat absorption for the evaporator. When a hot water heating instruction is received, the high pressure of the air conditioning system is obtained, and the heating requirement of the current indoor unit 50 can be judged according to the magnitude relation between the high pressure of the air conditioning system and the second pressure threshold, so that the on-off of the second differential pressure check valve 72 is controlled according to the heating requirement of the indoor unit 50, the heating circulation loop of the solar hot water and air conditioning integrated system is adjusted, and when the heating effect of the indoor unit 50 is met, the hot water heating capability is assisted to be improved by using the condensation heat generated by the air conditioning system, and the system energy efficiency is improved.
Further, controlling the on/off of the second differential pressure check valve 72 according to the magnitude relation between the high pressure and the second pressure threshold includes: if the high pressure is lower than the second pressure threshold, closing the second differential pressure check valve 72, so that the refrigerant discharged from the compressor 10 enters the indoor unit 50 to be condensed and heated, and the condensed refrigerant enters the outdoor heat exchanger 40 to be evaporated and absorb heat; if the high pressure is greater than or equal to the second pressure threshold, the second differential pressure check valve 72 is opened to communicate the four-way valve 20 with the intermediate heat exchanger 30, and a part of the refrigerant discharged from the compressor 10 enters the indoor unit 50 for condensation and the other part enters the intermediate heat exchanger 30 for condensation. Wherein, the preferred value of the second pressure difference threshold is 31bar, and the value range is 29bar-33bar.
It can be understood that, if the high-pressure of the air conditioning system is smaller than the second pressure threshold, it indicates that the heating requirement of the indoor unit 50 is currently large, and if a part of the refrigerant gas discharged from the compressor 10 enters the intermediate heat exchanger 30 for condensation, the heating requirement of the indoor unit 50 cannot be met, the heating effect of the indoor unit 50 is affected, and the heating comfort of a user is affected, so that the second differential pressure check valve 72 needs to be closed to ensure that all the refrigerant discharged from the compressor 10 enters the indoor unit 50 for condensation and heating. Meanwhile, the solar energy collected by the solar heat collector is utilized to heat the water in the heat collecting water tank, so as to prepare domestic hot water. If the high-pressure of the air conditioning system is greater than or equal to the second pressure threshold, it indicates that the heating demand of the current indoor unit 50 is low, so that the second differential pressure check valve 72 can be opened to adjust the heating circulation loop of the air conditioning system, so that the four-way valve 20 is communicated with the intermediate heat exchanger 30, a part of the refrigerant discharged by the compressor 10 enters the indoor unit 50 to be condensed for indoor heating, and the other part enters the intermediate heat exchanger 30 to be condensed for hot water heating, so as to assist in improving the hot water heating capacity and improve the system energy efficiency.
Further, after the second differential pressure check valve 72 is opened, the closing condition of the second differential pressure check valve 72 is: the high pressure is less than a third pressure threshold; wherein the third pressure threshold is less than the second pressure threshold. Wherein, the preferable value of the third pressure difference threshold is 27bar, and the value range is 26bar-28bar.
It is understood that the heating requirement of the indoor unit 50 can be secured by setting the condition that the second differential pressure check valve 72 is closed to the condition that the high pressure is less than the third pressure threshold value and setting the third pressure threshold value to be less than the second pressure threshold value after the second differential pressure check valve 72 is opened.
Further, the control method of the solar hot water and air conditioning integrated system further comprises the following steps: when the solar hot water and air conditioning integrated system does not need to produce hot water, the first electromagnetic valve 61 and the second electromagnetic valve 62 are closed.
It can be understood that when the solar hot water and air conditioning integrated system does not need to make hot water, the air conditioning system can be operated in a normal mode by closing the first solenoid valve 61 and the second solenoid valve 62.
In a specific embodiment, when the solar water heating and air conditioning integrated system operates in a hot water heating + cooling mode, the indoor unit 50 is an evaporator, the outdoor heat exchanger 40 is a condenser, the intermediate heat exchanger 30 is a condenser, and the condensation heat generated by the air conditioning system is preferentially used for heating water.
The specific flow paths of the air conditioning system are as follows: the high-temperature and high-pressure refrigerant gas discharged from the compressor 10 enters the four-way valve 20 through the port a of the four-way valve 20, and is discharged from the port B of the four-way valve 20, and then passes through the second solenoid valve 62 and enters the intermediate heat exchanger 30 to be condensed and heat-exchanged into a liquid refrigerant, and the water in the hot water collecting tank 2 is heated by the condensation heat generated by the intermediate heat exchanger 30. After exiting the intermediate heat exchanger 30, the liquid refrigerant is throttled by the indoor electronic expansion valve 82 and flows into the indoor unit 50 to be evaporated and cooled (at this time, the outdoor electronic expansion valve 81 is closed).
When the water temperature in the heat collecting water tank 2 is too high, that is, the difference between the saturation temperature corresponding to the high pressure of the system and the water temperature is less than or equal to the difference threshold, the heat exchange difficulty between the intermediate heat exchanger 30 and the heat collecting water tank 2 is high, the condensing effect of the intermediate heat exchanger 30 is poor, and the outdoor heat exchanger 40 is required to supplement condensation. When the pressure of the intermediate heat exchanger 30 is greater than or equal to the first pressure threshold, the first differential pressure check valve 71 is opened, and the outdoor electronic expansion valve 81 is opened, so that a part of the high-pressure refrigerant enters the intermediate heat exchanger 30 to be condensed, and a part of the high-pressure refrigerant enters the outdoor heat exchanger 40 to be condensed. The condensed liquid refrigerant enters the indoor unit 50 through the indoor electronic expansion valve 82 to be evaporated and cooled, so as to ensure the cooling effect of the indoor unit 50.
Wherein the value range of the difference threshold is 5-10 ℃, and the preferred value of the difference threshold is 8 ℃; the value range of the first pressure difference threshold is 30bar-33bar, and the preferred value of the first pressure difference threshold is 32bar.
In a specific embodiment, when the solar hot water and air conditioning integrated system operates in a hot water heating + heating mode, the outdoor heat exchanger 40 is an evaporator, the indoor unit 50 is a condenser, the intermediate heat exchanger 30 is a condenser, and the condensation heat generated by the air conditioning system is preferentially used for the air conditioning heating effect.
Specifically, when the heating demand of the indoor side of the air conditioner is relatively large, the specific flow path of the air conditioning system is as follows: the high-temperature and high-pressure refrigerant gas discharged from the compressor 10 enters the four-way valve 20 from the port a of the four-way valve 20, exits the four-way valve 20 from the port D of the four-way valve 20, enters the indoor unit 50 for condensation and heating, the condensed refrigerant liquid is throttled by the outdoor electronic expansion valve 81, enters the outdoor heat exchanger 40 for evaporation and heat exchange, the evaporated refrigerant flows in from the port B of the four-way valve 20 through the first differential pressure one-way valve 71, flows out from the port C of the four-way valve 20, and returns to the compressor 10.
It can be understood that, when the heating demand of the indoor side of the air conditioner is relatively large, the heat radiation of the indoor side is good, and the high pressure at the indoor unit 50 is low, so that the refrigerant gas discharged from the D port of the four-way valve 20 does not enter the second differential pressure check valve 72. Since the outdoor heat exchanger 40 is at a low pressure and the intermediate heat exchanger 30 is at a high pressure, the condensed refrigerant liquid flowing out of the indoor unit 50 flows only into the outdoor heat exchanger 40 and does not flow into the intermediate heat exchanger 30 due to the pressure difference.
When the indoor heating demand is low, the high pressure is too high at the moment, and the high pressure enters the intermediate heat exchanger 30 through the second differential pressure one-way valve 72 to be evaporated and heated, so that the water in the heat collection water tank is heated, and the domestic hot water is prepared.
By arranging the second differential pressure check valve 72 and opening the second differential pressure check valve 72 when the differential pressure is too large, the high-pressure refrigerant enters the outdoor heat exchanger 40 for condensation, and the heating effect of the indoor unit 50 can be ensured.
[ third embodiment ]
A third embodiment of the present invention provides an air conditioner, which includes the solar hot water and air conditioning integrated system according to the first embodiment, and the air conditioner can implement the control method of the solar hot water and air conditioning integrated system according to the second embodiment, and can achieve the same effect, and therefore, in order to avoid repetition, the details are not repeated herein.
[ fourth example ] A
A fourth embodiment of the present invention provides an air conditioner, which includes a computer readable storage medium storing a computer program and a processor, wherein when the computer program is read by the processor and executed, the control method of the solar hot water and air conditioner integrated system according to the second embodiment is implemented, and the same effects can be achieved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The control method of the solar hot water and air conditioning integrated system is characterized in that the solar hot water and air conditioning integrated system comprises a solar hot water system and an air conditioning system; the air conditioning system includes: the air conditioner comprises a compressor (10), a four-way valve (20), an intermediate heat exchanger (30), an outdoor heat exchanger (40), an indoor unit (50), a first electromagnetic valve (61), a second electromagnetic valve (62), a first differential pressure one-way valve (71) and a second differential pressure one-way valve (72); the first electromagnetic valve (61) is connected with the intermediate heat exchanger (30) in series and then connected with the indoor unit (50) in parallel; the second electromagnetic valve (62) is connected in series with the intermediate heat exchanger (30) and then connected in parallel with the outdoor heat exchanger (40); the first differential pressure check valve (71) is disposed between the four-way valve (20) and the outdoor heat exchanger (40), and the second differential pressure check valve (72) is disposed between the four-way valve (20) and the intermediate heat exchanger (30); wherein the intermediate heat exchanger (30) can exchange heat with the solar water heating system;
the control method of the solar hot water and air conditioner integrated system comprises the following steps:
the solar hot water and air conditioning integrated system performs refrigeration operation;
receiving a hot water making instruction;
acquiring the pressure value of the intermediate heat exchanger (30) in real time;
controlling the on-off of the first differential pressure one-way valve (71) according to the magnitude relation between the pressure value and a first pressure threshold value;
the step of controlling the on-off of the first differential pressure one-way valve (71) according to the magnitude relation between the pressure value and a first pressure threshold value comprises the following steps:
if the pressure value is smaller than the first pressure threshold value, closing the first differential pressure one-way valve (71) to enable the refrigerant discharged by the compressor (10) to enter the intermediate heat exchanger (30) for condensation and heat dissipation, and enabling the condensed refrigerant to enter the indoor unit (50) for evaporation and refrigeration; and/or the presence of a gas in the gas,
if the pressure value is larger than or equal to a first pressure threshold value, the first differential pressure one-way valve (71) is opened so that the four-way valve (20) is communicated with the outdoor heat exchanger (40), one part of the refrigerant discharged by the compressor (10) enters the intermediate heat exchanger (30) for condensation, and the other part of the refrigerant enters the outdoor heat exchanger (40) for condensation.
2. The control method of the integrated solar water heating and air conditioning system according to claim 1, wherein the solar water heating system comprises: the solar heat collector (1), the circulating pump (3) and the heat collecting water tank (2); wherein the intermediate heat exchanger (30) is capable of exchanging heat with the heat collecting water tank (2).
3. The control method of the integrated solar water heating and air conditioning system according to claim 2, further comprising:
the solar hot water and air conditioner integrated system performs heating operation;
receiving a hot water making instruction;
acquiring the high-pressure of the air conditioning system in real time;
and controlling the on-off of the second differential pressure one-way valve (72) according to the magnitude relation between the high pressure and a second pressure threshold.
4. The control method of the solar hot water and air conditioning integrated system according to claim 3, wherein the controlling the second differential pressure check valve (72) to be opened or closed according to the magnitude relation between the high pressure and a second pressure threshold comprises:
if the high-pressure is smaller than a second pressure threshold, closing the second differential pressure one-way valve (72) to enable the refrigerant discharged by the compressor (10) to enter the indoor unit (50) for condensation and heating, and enable the condensed refrigerant to enter the outdoor heat exchanger (40) for evaporation and heat absorption; and/or the presence of a gas in the gas,
if the high pressure is larger than or equal to the second pressure threshold value, the second differential pressure one-way valve (72) is opened to enable the four-way valve (20) to be communicated with the intermediate heat exchanger (30), one part of the refrigerant discharged by the compressor (10) enters the indoor unit (50) to be condensed, and the other part of the refrigerant enters the intermediate heat exchanger (30) to be condensed.
5. The control method of the solar hot water and air conditioning integrated system according to claim 3, wherein after the second differential pressure check valve (72) is opened, the closing condition of the second differential pressure check valve (72) is: the high pressure is less than a third pressure threshold; wherein the third pressure threshold is less than the second pressure threshold.
6. The control method of the integrated solar water heating and air conditioning system according to claim 2, further comprising:
when the solar hot water and air conditioning integrated system does not need to produce hot water, the first electromagnetic valve (61) and the second electromagnetic valve (62) are closed.
7. An air conditioner characterized by a computer-readable storage medium storing a computer program and a processor, the computer program being read by the processor and when executed, implementing the method of controlling a solar hot-water and air-conditioning integrated system according to any one of claims 1 to 6.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11118247A (en) * | 1997-10-21 | 1999-04-30 | Matsushita Electric Ind Co Ltd | Heat pump type solar hot water supply system |
| JP2000171105A (en) * | 1998-12-03 | 2000-06-23 | Sharp Corp | Solar heat pump cooler/heater water heater |
| CN1945173A (en) * | 2006-11-09 | 2007-04-11 | 中国科学技术大学 | Multiple heat source multifunction solar energy heat pump |
| CN102235725A (en) * | 2010-04-28 | 2011-11-09 | 侯春来 | Air-conditioning system of multi-connected solar air source heat pump |
| CN202734124U (en) * | 2012-09-01 | 2013-02-13 | 湖南瑞翼节能科技有限公司 | Multifunctional heat pump system |
| KR20180126941A (en) * | 2017-05-19 | 2018-11-28 | 한국기계연구원 | Control system for a solar assisted heat pump system with hybrid solar collectors |
| CN111156590A (en) * | 2020-01-03 | 2020-05-15 | 燕山大学 | Solar energy-air source heat pump air conditioning system with refrigeration, heat supply and hot water supply |
| CN114046575A (en) * | 2021-11-03 | 2022-02-15 | 珠海格力电器股份有限公司 | Air conditioner hot water integrated system and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016771A (en) * | 2016-07-18 | 2016-10-12 | 常州海卡太阳能热泵有限公司 | Solar air source heat pump triple co-generation system and control method thereof |
| CN211119816U (en) * | 2019-11-19 | 2020-07-28 | 珠海格力电器股份有限公司 | Solar air-conditioning heat pump system and air conditioner |
-
2022
- 2022-08-31 CN CN202211050903.1A patent/CN115127167B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11118247A (en) * | 1997-10-21 | 1999-04-30 | Matsushita Electric Ind Co Ltd | Heat pump type solar hot water supply system |
| JP2000171105A (en) * | 1998-12-03 | 2000-06-23 | Sharp Corp | Solar heat pump cooler/heater water heater |
| CN1945173A (en) * | 2006-11-09 | 2007-04-11 | 中国科学技术大学 | Multiple heat source multifunction solar energy heat pump |
| CN102235725A (en) * | 2010-04-28 | 2011-11-09 | 侯春来 | Air-conditioning system of multi-connected solar air source heat pump |
| CN202734124U (en) * | 2012-09-01 | 2013-02-13 | 湖南瑞翼节能科技有限公司 | Multifunctional heat pump system |
| KR20180126941A (en) * | 2017-05-19 | 2018-11-28 | 한국기계연구원 | Control system for a solar assisted heat pump system with hybrid solar collectors |
| CN111156590A (en) * | 2020-01-03 | 2020-05-15 | 燕山大学 | Solar energy-air source heat pump air conditioning system with refrigeration, heat supply and hot water supply |
| CN114046575A (en) * | 2021-11-03 | 2022-02-15 | 珠海格力电器股份有限公司 | Air conditioner hot water integrated system and control method thereof |
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