CN112066583A - Air conditioning unit with double heat sources and control method thereof - Google Patents

Air conditioning unit with double heat sources and control method thereof Download PDF

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Publication number
CN112066583A
CN112066583A CN202010963457.8A CN202010963457A CN112066583A CN 112066583 A CN112066583 A CN 112066583A CN 202010963457 A CN202010963457 A CN 202010963457A CN 112066583 A CN112066583 A CN 112066583A
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CN
China
Prior art keywords
electromagnetic valve
heat exchanger
controlling
air conditioning
heat source
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Pending
Application number
CN202010963457.8A
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Chinese (zh)
Inventor
荆莹
王强
柯彬彬
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202010963457.8A priority Critical patent/CN112066583A/en
Publication of CN112066583A publication Critical patent/CN112066583A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0059Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46Improving electric energy efficiency or saving
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00Use of energy recovery systems in air conditioning, ventilation or screening
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

The invention discloses an air conditioning unit with double heat sources and a control method thereof, wherein the air conditioning unit comprises: the indoor heat exchanger is connected with the outdoor heat exchanger; the indoor heat exchanger at least comprises a first indoor heat exchanger and a second indoor heat exchanger which are arranged in parallel; the outdoor heat exchanger at least comprises a first outdoor heat exchanger and a second outdoor heat exchanger which are arranged in parallel; the first outdoor heat exchanger adopts a first heat source for heat exchange, and the second outdoor heat exchanger adopts a second heat source for heat exchange. The invention solves the problems that the existing air conditioning system in the prior art can not realize heating and has single heat source, and can improve the utilization rate of equipment and the energy efficiency of the system.

Description

Air conditioning unit with double heat sources and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit with double heat sources and a control method thereof.
Background
In order to save energy and reduce environmental pollution, a refrigeration system with double evaporation temperatures is widely researched in China. The refrigeration system with double evaporation temperatures in the prior art can only realize double evaporation temperature refrigeration, has single function, can not flexibly control the loads of two evaporation sides, does not have a mode of heating working conditions, and is idle in winter, so that the utilization rate of equipment is low.
And the double evaporator has single heat source, and has poor heating effect even cannot meet the requirements of users under the condition of unstable heat source conditions in winter.
Aiming at the problems that the air conditioning system in the related art cannot realize heating and has a single heat source, no effective solution is provided at present.
Disclosure of Invention
The invention provides an air conditioning unit with double heat sources and a control method thereof, which at least solve the problems that an air conditioning system with double evaporation temperatures in the prior art cannot realize heating and the heat source is single.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioning unit including: the indoor heat exchanger is connected with the outdoor heat exchanger; the indoor heat exchanger at least comprises a first indoor heat exchanger and a second indoor heat exchanger which are arranged in parallel; the outdoor heat exchanger at least comprises a first outdoor heat exchanger and a second outdoor heat exchanger which are arranged in parallel; the first outdoor heat exchanger adopts a first heat source for heat exchange, and the second outdoor heat exchanger adopts a second heat source for heat exchange.
Further, the first indoor heat exchanger is connected with a first port of the four-way valve through a first electromagnetic valve; the second indoor heat exchanger is connected with a first port of the four-way valve through a second electromagnetic valve; the first outdoor heat exchanger is connected with a second port of the four-way valve through a third electromagnetic valve; and the second outdoor heat exchanger is connected with a second port of the four-way valve through a fourth electromagnetic valve.
Further, the compressor includes an exhaust port, a first suction port, and a second suction port; the exhaust port of the compressor is connected with the third port of the four-way valve, and the first air suction port is connected with the fourth port of the four-way valve through the fifth electromagnetic valve.
Further, still include: one end of the sixth electromagnetic valve is connected with the second air suction port, and the other end of the sixth electromagnetic valve is connected with a pipeline between the first air suction port and the fifth electromagnetic valve; one end of the seventh electromagnetic valve is connected with the second air suction port, and the other end of the seventh electromagnetic valve is connected with a pipeline between the second outdoor heat exchanger and the fourth electromagnetic valve; and one end of the eighth electromagnetic valve is connected with the second air suction port, and the other end of the eighth electromagnetic valve is connected with a pipeline between the second indoor heat exchanger and the second electromagnetic valve.
Further, still include: the first throttling element is positioned on a pipeline between the indoor heat exchanger and the outdoor heat exchanger; one end of the ninth electromagnetic valve is connected with the first indoor heat exchanger, and the other end of the ninth electromagnetic valve is connected with the first throttling element; and one end of the tenth electromagnetic valve is connected with the second outdoor heat exchanger, and the other end of the tenth electromagnetic valve is connected with the first throttling element.
Further, still include: the eleventh electromagnetic valve and the twelfth electromagnetic valve are connected in series and are positioned on a pipeline between the first outdoor heat exchanger and the first throttling element; and one end of the second throttling element is connected with a pipeline between the first indoor heat exchanger and the ninth electromagnetic valve, and the other end of the second throttling element is connected with a pipeline between the eleventh electromagnetic valve and the twelfth electromagnetic valve.
Further, the second heat source is a high-temperature heat source and is used for providing a heat source for the second outdoor heat exchanger in the heating mode; wherein, the high-temperature heat source at least comprises one of the following components: solar energy, industrial waste heat and life waste heat.
Further, still include: and the heat storage device is connected with the first outdoor heat exchanger and the second outdoor heat exchanger, and is used for recovering heat released by the first outdoor heat exchanger and/or the second outdoor heat exchanger in a refrigeration mode and preparing domestic hot water.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit, including: monitoring whether the heating operation or the cooling operation of the air conditioning unit is triggered or not; when the heating operation is triggered, judging whether the first heat source and the second heat source can meet the heating requirement, and controlling the air conditioning unit to enter a corresponding heating operation mode according to a judgment result; when the refrigeration operation is triggered, the refrigeration requirement of the air conditioning unit is detected, and the air conditioning unit is controlled to enter a corresponding refrigeration operation mode according to the refrigeration requirement.
Further, the heating operation mode at least includes: a second heat source individual heating mode, a common heating mode, and a first heat source individual heating mode; controlling the air conditioning unit to enter a corresponding heating operation mode according to the judgment result, comprising the following steps: when the first heat source and the second heat source can meet the heating requirement, judging the energy consumption of the second heat source independent heating mode, the common heating mode and the first heat source independent heating mode, and controlling the air conditioning unit to enter the heating mode with the minimum energy consumption; when only the second heat source can meet the heating requirement, controlling the air conditioning unit to enter a second heat source independent heating mode; when only the first heat source can meet the heating requirement, controlling the air conditioning unit to enter a first heat source independent heating mode; and when the first heat source and the second heat source cannot meet the heating requirement, controlling the air conditioning unit to enter a common heating mode.
Further, the cooling operation mode includes at least: a second heat source individual refrigeration mode, a common refrigeration mode, and a first heat source individual refrigeration mode; the refrigeration requirements include at least a high refrigeration requirement and a low refrigeration requirement; according to refrigeration demand control air conditioning unit and get into corresponding refrigeration mode of operation, include: when the refrigeration demand is high refrigeration demand, controlling the air conditioning unit to enter a common refrigeration mode; and when the refrigeration demand is low refrigeration demand, controlling the air conditioning unit to enter a second heat source independent refrigeration mode or a first heat source independent refrigeration mode.
Further, controlling the air conditioning unit to enter a second heat source single heating mode comprises the following steps: controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve, the twelfth electromagnetic valve and the tenth electromagnetic valve to be opened; controlling the fifth electromagnetic valve, the ninth electromagnetic valve, the eighth electromagnetic valve, the eleventh electromagnetic valve, the fourth electromagnetic valve and the third electromagnetic valve to be closed; and controlling the opening of the second throttling element and the first throttling element.
Further, controlling the air conditioning unit to enter a common heating mode comprises: controlling the seventh electromagnetic valve, the fifth electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve, the eleventh electromagnetic valve, the tenth electromagnetic valve and the third electromagnetic valve to be opened; controlling the sixth electromagnetic valve, the ninth electromagnetic valve, the eighth electromagnetic valve, the twelfth electromagnetic valve and the fourth electromagnetic valve to be closed; and controlling the opening of the second throttling element and the first throttling element.
Further, controlling the air conditioning unit to enter a first heat source single heating mode comprises the following steps: controlling the sixth electromagnetic valve, the fifth electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve, the twelfth electromagnetic valve, the eleventh electromagnetic valve and the third electromagnetic valve to be opened; controlling the seventh electromagnetic valve, the ninth electromagnetic valve, the eighth electromagnetic valve, the tenth electromagnetic valve and the fourth electromagnetic valve to be closed; and controlling the opening of the second throttling element and the first throttling element.
Further, controlling the air conditioning unit to enter a first heat source individual cooling mode includes: controlling the fifth electromagnetic valve, the first electromagnetic valve, the eighth electromagnetic valve, the twelfth electromagnetic valve, the eleventh electromagnetic valve and the third electromagnetic valve to be opened; controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the ninth electromagnetic valve, the second electromagnetic valve, the tenth electromagnetic valve and the fourth electromagnetic valve to be closed; and controlling the opening of the second throttling element and the first throttling element.
Further, controlling the air conditioning unit to enter a common cooling mode includes: controlling the opening of a fifth electromagnetic valve, a first electromagnetic valve, an eighth electromagnetic valve, an eleventh electromagnetic valve, a tenth electromagnetic valve, a fourth electromagnetic valve and a third electromagnetic valve; controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the ninth electromagnetic valve, the second electromagnetic valve and the twelfth electromagnetic valve to be closed; controlling the second throttling element and the first throttling element to be opened; and controlling the heat storage device to recover part of heat released by the second outdoor heat exchanger.
Further, controlling the air conditioning unit to enter a second heat source individual cooling mode comprises: controlling the opening of a fifth electromagnetic valve, a first electromagnetic valve, an eighth electromagnetic valve, a twelfth electromagnetic valve, a tenth electromagnetic valve and a fourth electromagnetic valve; controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the ninth electromagnetic valve, the second electromagnetic valve, the eleventh electromagnetic valve and the third electromagnetic valve to be closed; controlling the second throttling element and the first throttling element to be opened; and controlling the heat storage device to recover all heat released by the second outdoor heat exchanger.
According to still another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
The invention provides a double-heat-source heat pump system which can be used for refrigerating in summer and heating in winter, wherein different circulation modes of the system can be realized under different operation working conditions through the control of a four-way reversing valve and an electromagnetic valve, for example, double heat sources are adopted for heating in winter, and the heating effect is improved. The double-heat-source heat pump system effectively solves the problems that the existing air-conditioning system cannot realize heating and has a single heat source, and can improve the equipment utilization rate and the system energy efficiency.
Drawings
FIG. 1 is an alternative structural schematic of an air conditioning assembly according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative configuration of an air conditioning assembly according to an embodiment of the present invention; and
fig. 3 is an alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention.
Description of reference numerals:
1. a first indoor heat exchanger; 2. a second indoor heat exchanger; 3. a compressor; 4. a four-way valve; 5. a first outdoor heat exchanger; 6. a second outdoor heat exchanger; 7. a first throttling element; 8. a second throttling element; 91. a first solenoid valve; 92. a second solenoid valve; 93. a third electromagnetic valve; 94. a fourth solenoid valve; 95. a fifth solenoid valve; 96. a sixth electromagnetic valve; 97. a seventh electromagnetic valve; 98. an eighth solenoid valve; 99. a ninth electromagnetic valve; 910. a tenth solenoid valve; 911. an eleventh electromagnetic valve; 912. a twelfth electromagnetic valve; 10. a second heat source; 101. a water tank; 102. a solar heat collector.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an air conditioning unit is provided, and specifically, fig. 1 shows an alternative structural schematic diagram of the unit, as shown in fig. 1, the unit includes:
the compressor 3, the four-way valve 4, the indoor heat exchanger and the outdoor heat exchanger are connected in sequence; the indoor heat exchanger at least comprises a first indoor heat exchanger 1 and a second indoor heat exchanger 2 which are arranged in parallel;
the outdoor heat exchanger at least comprises a first outdoor heat exchanger 5 and a second outdoor heat exchanger 6 which are arranged in parallel;
the first outdoor heat exchanger 5 exchanges heat with a first heat source, and the second outdoor heat exchanger 6 exchanges heat with a second heat source 10.
In the above embodiment, a dual-heat-source heat pump system is provided, which can be used for both cooling in summer and heating in winter, and by controlling the four-way reversing valve and the solenoid valve, different circulation modes of the system can be realized under different operation conditions, for example, dual heat sources are used for heating in winter, so that the heating effect is improved. The double-heat-source heat pump system effectively solves the problems that the existing air-conditioning system cannot realize heating and has a single heat source, and can improve the equipment utilization rate and the system energy efficiency.
As shown in fig. 1, the first indoor heat exchanger 1 is connected to a first port of the four-way valve 4 through a first solenoid valve 91; the second indoor heat exchanger 2 is connected with a first port of the four-way valve 4 through a second solenoid valve 92; the first outdoor heat exchanger 5 is connected with a second port of the four-way valve 4 through a third electromagnetic valve 93; the second outdoor heat exchanger 6 is connected to a second port of the four-way valve 4 through a fourth solenoid valve 94. The electromagnetic valve can realize the operation of a single (indoor or outdoor) heat exchanger or the simultaneous operation of two (indoor or outdoor) heat exchangers.
The compressor adopts a double-suction-port compressor, and the compressor 3 comprises an exhaust port, a first suction port and a second suction port; wherein, the exhaust port of the compressor 3 is connected with the third port of the four-way valve 4, and the first intake port is connected with the fourth port of the four-way valve 4 through the fifth solenoid valve 95.
The system further comprises: a sixth electromagnetic valve 96 having one end connected to the second suction port and the other end connected to a pipe between the first suction port and the fifth electromagnetic valve 95; a seventh electromagnetic valve 97 having one end connected to the second suction port and the other end connected to a pipe between the second outdoor heat exchanger 6 and the fourth electromagnetic valve 94; one end of the eighth solenoid valve 98 is connected to the second suction port, and the other end is connected to a pipe between the second indoor heat exchanger 2 and the second solenoid valve 92. The two air suction ports of the compressor are provided with bypass management, and the bypass management is provided with an electromagnetic valve, so that air can be sucked through different air suction ports.
Still include between indoor heat exchanger and the outdoor heat exchanger: a first throttling element 7 positioned on a pipeline between the indoor heat exchanger and the outdoor heat exchanger; a ninth electromagnetic valve 99 having one end connected to the first indoor heat exchanger 1 and the other end connected to the first throttling element 7; and a tenth solenoid valve 910 having one end connected to the first throttling element 7 between the second outdoor heat exchanger 6 and the other end.
An eleventh electromagnetic valve 911 and a twelfth electromagnetic valve 912 are also connected in series between the first outdoor heat exchanger 5 and the first throttling element 7; one end of the second throttling element 8 is connected to a pipe between the first indoor heat exchanger 1 and the ninth electromagnetic valve 99, and the other end is connected to a pipe between the eleventh electromagnetic valve 911 and the twelfth electromagnetic valve 912.
In a preferred embodiment of the present invention, the second heat source 10 is a high temperature heat source for providing a heat source for the second outdoor heat exchanger 6 in the heating mode; wherein, the high-temperature heat source at least comprises one of the following components: solar energy, industrial waste heat and life waste heat. The first heat source can adopt natural energy sources including an air source and a water source, but not limited to the natural energy sources, so as to achieve the effects of energy conservation and emission reduction.
Fig. 2 shows an alternative structure of the air conditioning system when the second heat source 10 is solar energy, and as shown in fig. 2, the water tank 101 is heated by the solar heat collector 102, and the heated water passes through the second outdoor heat exchanger side to exchange heat with the refrigerant.
The system further comprises: and the heat storage device is connected with the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 and is used for recovering heat released by the first outdoor heat exchanger 5 and/or the second outdoor heat exchanger 6 in a refrigeration mode and preparing domestic hot water. The evaporator can carry out heat recovery in summer, and the heat in a room is recovered, so that the effect of fully utilizing energy is achieved.
The system of the invention comprises two evaporators, two condensers, a compressor, a four-way valve, an electromagnetic valve, a throttling device and the like. The system can realize double-evaporation temperature refrigeration in summer and can recover the heat of the room. The heat can be taken from two heat sources in winter, and energy is fully utilized according to the characteristics of different heat sources, so that the system is stable, energy-saving and efficient to operate. The system can realize refrigeration, heating and heat recovery, and improve the utilization rate of equipment.
Example 2
In a preferred embodiment 2 of the present invention, there is provided an air conditioning unit control method applied to the air conditioning unit in the above embodiment 1. Specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S302-S306:
s302: monitoring whether the heating operation or the cooling operation of the air conditioning unit is triggered or not;
s304: when the heating operation is triggered, judging whether the first heat source and the second heat source can meet the heating requirement, and controlling the air conditioning unit to enter a corresponding heating operation mode according to a judgment result;
s306: when the refrigeration operation is triggered, the refrigeration requirement of the air conditioning unit is detected, and the air conditioning unit is controlled to enter a corresponding refrigeration operation mode according to the refrigeration requirement.
In the above embodiment, a dual-heat-source heat pump system is provided, which can be used for both cooling in summer and heating in winter, and by controlling the four-way reversing valve and the solenoid valve, different circulation modes of the system can be realized under different operation conditions, for example, dual heat sources are used for heating in winter, so that the heating effect is improved. The double-heat-source heat pump system effectively solves the problems that the existing air-conditioning system cannot realize heating and has a single heat source, and can improve the equipment utilization rate and the system energy efficiency.
The heating operation mode at least comprises the following steps: a second heat source individual heating mode, a common heating mode, and a first heat source individual heating mode; controlling the air conditioning unit to enter a corresponding heating operation mode according to the judgment result, comprising the following steps: when the first heat source and the second heat source can meet the heating requirement, judging the energy consumption of the second heat source independent heating mode, the common heating mode and the first heat source independent heating mode, and controlling the air conditioning unit to enter the heating mode with the minimum energy consumption; when only the second heat source can meet the heating requirement, controlling the air conditioning unit to enter a second heat source independent heating mode; when only the first heat source can meet the heating requirement, controlling the air conditioning unit to enter a first heat source independent heating mode; and when the first heat source and the second heat source cannot meet the heating requirement, controlling the air conditioning unit to enter a common heating mode.
The cooling operation mode at least comprises: a second heat source individual refrigeration mode, a common refrigeration mode, and a first heat source individual refrigeration mode; the refrigeration requirements include at least a high refrigeration requirement and a low refrigeration requirement; according to refrigeration demand control air conditioning unit and get into corresponding refrigeration mode of operation, include: when the refrigeration demand is high refrigeration demand, controlling the air conditioning unit to enter a common refrigeration mode; and when the refrigeration demand is low refrigeration demand, controlling the air conditioning unit to enter a second heat source independent refrigeration mode or a first heat source independent refrigeration mode.
Under different operating conditions, the system can realize different combination modes such as independent operation, simultaneous operation and the like by controlling the four-way reversing valve and the electromagnetic valve, the two evaporators and the two condensers, can realize double-evaporation-temperature refrigeration or single-evaporation-temperature refrigeration in summer, can utilize one heat source to heat in winter or simultaneously utilize two heat sources to heat, improves the operating energy efficiency of the system and enables the system to operate optimally. Specifically, the method comprises the following steps:
when the system operates in winter, different operation controls can be carried out according to different heat source temperatures:
when the temperature of the second heat source is high and the heat quantity is large, that is, the second heat source can meet the heating requirement, only the second heat source heat exchanger 8 needs to be used as the heat source side. The system cycle for this condition is as follows: the sixth solenoid valve 96, the seventh solenoid valve 97, the first solenoid valve 91, the second solenoid valve 92, the twelfth solenoid valve 912, and the tenth solenoid valve 910 are opened, the fifth solenoid valve 95, the ninth solenoid valve 99, the eighth solenoid valve 98, the eleventh solenoid valve 911, the fourth solenoid valve 94, and the third solenoid valve 93 are closed, and the second throttling element 8 and the first throttling element 7 are opened. The refrigerant releases heat in the first indoor heat exchanger 1 and the second indoor heat exchanger 2 respectively, the refrigerant flowing through the first indoor heat exchanger 1 is throttled by the second throttling element 8, enters the second outdoor heat exchanger 6 through the twelfth electromagnetic valve 912 and the tenth electromagnetic valve 910, the refrigerant flowing through the second indoor heat exchanger 2 is throttled by the first throttling element 7, enters the second outdoor heat exchanger 6 through the tenth electromagnetic valve 910, all the refrigerant absorbs heat in the second outdoor heat exchanger 6, the refrigerant after absorbing heat enters the two independent parallel cylinders of the compressor 3 through the seventh electromagnetic valve 97 and the sixth electromagnetic valve 96 for compression, the compressed refrigerant is discharged through the same exhaust port, and enters the first indoor heat exchanger 1 and the second indoor heat exchanger 2 through the four-way reversing valve 4, the first electromagnetic valve 91 and the second electromagnetic valve 92 respectively for the next cycle. In this cycle, the indoor side has a single condensing temperature and the outdoor side has a single evaporating temperature.
When the second heat source 10 is low in temperature and low in heat, the second outdoor heat exchanger 6 and the first outdoor heat exchanger 5 are required to operate in combination to meet the heat required by the system. The system circulation process is as follows: the seventh solenoid valve 97, the fifth solenoid valve 95, the first solenoid valve 91, the second solenoid valve 92, the eleventh solenoid valve 911, the tenth solenoid valve 910, and the third solenoid valve 93 are opened, the sixth solenoid valve 96, the ninth solenoid valve 99, the eighth solenoid valve 98, the twelfth solenoid valve 912, and the fourth solenoid valve 94 are closed, and the second throttling element 8 and the first throttling element 7 are opened. A part of refrigerant releases heat in the first indoor heat exchanger 1, the refrigerant after releasing heat is throttled by the second throttling element 8, then enters the first outdoor heat exchanger 5 through the eleventh electromagnetic valve 911 to absorb heat, and enters an independent cylinder of the compressor 3 through the third electromagnetic valve 93, the four-way reversing valve 4 and the fifth electromagnetic valve 95 to be compressed after absorbing heat. Another part of the refrigerant releases heat in the second indoor heat exchanger 2, after releasing heat, the refrigerant is throttled by the first throttling element 7, then enters the second outdoor heat exchanger 6 through the tenth electromagnetic valve 910 to absorb heat, and after absorbing heat, enters another independent cylinder of the compressor 3 through the seventh electromagnetic valve 97 to be compressed. The two paths of compressed refrigerants are discharged from an exhaust port, and enter the first indoor heat exchanger 1 and the second indoor heat exchanger 2 through the four-way reversing valve 4, the first electromagnetic valve 91 and the second electromagnetic valve 92 respectively to perform the next cycle. In this cycle, the indoor side has a single condensing temperature and the outdoor side has a dual evaporating temperature.
When the second heat source 10 is not available, it is necessary to use the first outdoor heat exchanger 5 alone as the heat source side. The system cycle for this condition is as follows: the sixth solenoid valve 96, the fifth solenoid valve 95, the first solenoid valve 91, the second solenoid valve 92, the twelfth solenoid valve 912, the eleventh solenoid valve 911, and the third solenoid valve 93 are opened, the seventh solenoid valve 97, the ninth solenoid valve 99, the eighth solenoid valve 98, the tenth solenoid valve 910, and the fourth solenoid valve 94 are closed, and the second throttling element 8 and the first throttling element 7 are opened. The refrigerant releases heat in the first indoor heat exchanger 1 and the second indoor heat exchanger 2 respectively, the refrigerant flowing through the first indoor heat exchanger 1 is throttled by the second throttling element 8, then enters the first outdoor heat exchanger 5 through the eleventh electromagnetic valve 911, the refrigerant flowing through the second indoor heat exchanger 2 is throttled by the first throttling element 7, then enters the first outdoor heat exchanger 5 through the twelfth electromagnetic valve 912 and the eleventh electromagnetic valve 911, all the refrigerant absorbs heat in the first outdoor heat exchanger 5, the refrigerant after absorbing heat enters the two independent parallel cylinders of the compressor 3 through the third electromagnetic valve 93, the four-way reversing valve 4, the fifth electromagnetic valve 95 and the sixth electromagnetic valve 96 for compression, the compressed refrigerant is discharged through the same exhaust port, and enters the first indoor heat exchanger 1 and the second indoor heat exchanger 2 through the four-way reversing valve 4, the first electromagnetic valve 91 and the second electromagnetic valve 92 respectively, the next cycle is performed. In this cycle, the indoor side has a single condensing temperature and the outdoor side has a single evaporating temperature.
When the first and second indoor heat exchangers 1 and 2 do not need to be operated simultaneously, the refrigerant may be caused to flow through only one of the use-side heat exchangers by closing the first or second solenoid valves 91 and 92. At this time, the first and second outdoor heat exchangers 5 and 6 may be operated independently and simultaneously.
When the system is operated in summer, the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6 can perform different operation control as the cold source side:
the operation mode is as follows: heat is released only in the first outdoor heat exchanger 5, and heat recovery is not performed. The system cycle for this condition is as follows: the fifth solenoid valve 95, the first solenoid valve 91, the eighth solenoid valve 98, the twelfth solenoid valve 912, the eleventh solenoid valve 911, and the third solenoid valve 93 are opened, the sixth solenoid valve 96, the seventh solenoid valve 97, the ninth solenoid valve 99, the second solenoid valve 92, the tenth solenoid valve 910, and the fourth solenoid valve 94 are closed, and the second throttling element 8 and the first throttling element 7 are opened. A part of refrigerant absorbs heat in the first indoor heat exchanger 1, and the refrigerant after absorbing heat enters an independent cylinder of the compressor 3 through the first electromagnetic valve 91 and the four-way reversing valve 4 to be compressed. Another part of the refrigerant absorbs heat in the second indoor heat exchanger 2, and the refrigerant after absorbing heat enters another independent cylinder of the compressor 3 through the eighth solenoid valve 98 to be compressed. All the compressed refrigerant enters the first outdoor heat exchanger 5 through the four-way reversing valve 4 and the third electromagnetic valve 93 to release heat. The refrigerant after heat release passes through the eleventh electromagnetic valve 911, and a part of the refrigerant enters the second throttling element 8 for throttling and then enters the first indoor heat exchanger 1 for the next cycle. Another part of the refrigerant passes through the twelfth solenoid valve 912, enters the first throttling element 7 for throttling, and then enters the second indoor heat exchanger 2 for the next cycle. In this cycle, the indoor side has a double evaporation temperature and the outdoor side has a single condensation temperature.
The second operation mode is as follows: heat is released in the first outdoor heat exchanger 5 and the second outdoor heat exchanger 6, and part of the heat is recovered by the second outdoor heat exchanger 6. The system cycle for this condition is as follows: the fifth solenoid valve 95, the first solenoid valve 91, the eighth solenoid valve 98, the eleventh solenoid valve 911, the tenth solenoid valve 910, the fourth solenoid valve 94, and the third solenoid valve 93 are opened, the sixth solenoid valve 96, the seventh solenoid valve 97, the ninth solenoid valve 99, the second solenoid valve 92, and the twelfth solenoid valve 912 are closed, and the second throttling element 8 and the first throttling element 7 are opened. A part of refrigerant absorbs heat in the first indoor heat exchanger 1, and the refrigerant after absorbing heat enters an independent cylinder of the compressor 3 through the first electromagnetic valve 91, the four-way reversing valve 4 and the fifth electromagnetic valve 95 to be compressed. Another part of the refrigerant absorbs heat in the second indoor heat exchanger 2, and the refrigerant after absorbing heat enters another independent cylinder of the compressor 3 through the eighth solenoid valve 98 to be compressed. All the compressed refrigerant is discharged through the four-way reversing valve 4, a part of the refrigerant enters the first outdoor heat exchanger 5 through the third electromagnetic valve 93 to release heat, the refrigerant after heat release enters the second throttling element 8 through the eleventh electromagnetic valve 911 to be throttled, and then enters the first indoor heat exchanger 1 to perform the next cycle. Another part of the refrigerant enters the second outdoor heat exchanger 6 through the fourth electromagnetic valve 94 to release heat, the second outdoor heat exchanger 6 recovers the part of the heat, and the refrigerant after heat release enters the first throttling element 7 through the tenth electromagnetic valve 910 to be throttled and then enters the second indoor heat exchanger 2 to perform the next cycle. In this cycle, the indoor side has a double evaporation temperature and the outdoor side has a single condensation temperature.
The third operation mode is as follows: heat is released in the second outdoor heat exchanger 6, and the second outdoor heat exchanger 6 recovers all the heat. The system cycle for this condition is as follows: the fifth solenoid valve 95, the first solenoid valve 91, the eighth solenoid valve 98, the twelfth solenoid valve 912, the tenth solenoid valve 910, and the fourth solenoid valve 94 are opened, the sixth solenoid valve 96, the seventh solenoid valve 97, the ninth solenoid valve 99, the second solenoid valve 92, the eleventh solenoid valve 911, and the third solenoid valve 93 are closed, and the second throttling element 8 and the first throttling element 7 are opened. A part of refrigerant absorbs heat in the first indoor heat exchanger 1, and the refrigerant after absorbing heat enters an independent cylinder of the compressor 3 through the first electromagnetic valve 91, the four-way reversing valve 4 and the fifth electromagnetic valve 95 to be compressed. Another part of the refrigerant absorbs heat in the second indoor heat exchanger 2, and the refrigerant after absorbing heat enters another independent cylinder of the compressor 3 through the eighth solenoid valve 98 to be compressed. All the compressed refrigerant is discharged through the four-way reversing valve 4, enters the second outdoor heat exchanger 6 through the fourth electromagnetic valve 94 to release heat, and the second outdoor heat exchanger 6 recovers the heat. The refrigerant after heat release flows through the tenth solenoid valve 910, and a portion of the refrigerant enters the second throttling element 8 for throttling through the twelfth solenoid valve 912 and then enters the first indoor heat exchanger 1 for the next cycle. Another part of the refrigerant enters the first throttling element 7 for throttling and then enters the second indoor heat exchanger 2 for the next cycle. In this cycle, the indoor side has a double evaporation temperature and the outdoor side has a single condensation temperature.
When the first and second indoor heat exchangers 1 and 2 do not need to be operated simultaneously, the refrigerant can flow through only one of the use-side heat exchangers by closing the second and first throttling elements 8 and 7. At this time, the first and second outdoor heat exchangers 5 and 6 may be operated independently and simultaneously.
Under different operating conditions, the system can realize different combination modes such as independent operation, simultaneous operation and the like by controlling the four-way reversing valve and the electromagnetic valve, the two evaporators and the two condensers, can realize double-evaporation-temperature refrigeration or single-evaporation-temperature refrigeration in summer, can utilize one heat source to heat in winter or simultaneously utilize two heat sources to heat, improves the operating energy efficiency of the system and enables the system to operate optimally.
Example 3
Based on the air conditioning unit control method provided in embodiment 2 above, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the above embodiment, a dual-heat-source heat pump system is provided, which can be used for both cooling in summer and heating in winter, and by controlling the four-way reversing valve and the solenoid valve, different circulation modes of the system can be realized under different operation conditions, for example, dual heat sources are used for heating in winter, so that the heating effect is improved. The double-heat-source heat pump system effectively solves the problems that the existing air-conditioning system cannot realize heating and has a single heat source, and can improve the equipment utilization rate and the system energy efficiency.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (18)

1. An air conditioning assembly, comprising:
the indoor heat exchanger comprises a compressor (3), a four-way valve (4), an indoor heat exchanger and an outdoor heat exchanger which are connected in sequence;
the indoor heat exchanger at least comprises a first indoor heat exchanger (1) and a second indoor heat exchanger (2) which are arranged in parallel;
the outdoor heat exchanger at least comprises a first outdoor heat exchanger (5) and a second outdoor heat exchanger (6) which are arranged in parallel; the first outdoor heat exchanger (5) adopts a first heat source for heat exchange, and the second outdoor heat exchanger (6) adopts a second heat source (10) for heat exchange.
2. The assembly according to claim 1,
the first indoor heat exchanger (1) is connected with a first port of the four-way valve (4) through a first electromagnetic valve (91);
the second indoor heat exchanger (2) is connected with the first port of the four-way valve (4) through a second electromagnetic valve (92);
the first outdoor heat exchanger (5) is connected with a second port of the four-way valve (4) through a third electromagnetic valve (93);
and the second outdoor heat exchanger (6) is connected with the second port of the four-way valve (4) through a fourth electromagnetic valve (94).
3. The assembly according to claim 2,
the compressor (3) comprises an exhaust port, a first air suction port and a second air suction port; the exhaust port of the compressor (3) is connected with the third port of the four-way valve (4), and the first intake port is connected with the fourth port of the four-way valve (4) through a fifth electromagnetic valve (95).
4. The assembly according to claim 3, further comprising:
a sixth electromagnetic valve (96) having one end connected to the second suction port and the other end connected to a pipe between the first suction port and the fifth electromagnetic valve (95);
a seventh electromagnetic valve (97) having one end connected to the second suction port and the other end connected to a pipe between the second outdoor heat exchanger (6) and the fourth electromagnetic valve (94);
and an eighth solenoid valve (98) having one end connected to the second suction port and the other end connected to a pipe between the second indoor heat exchanger (2) and the second solenoid valve (92).
5. The assembly according to claim 1, further comprising:
a first throttling element (7) located on the piping between the indoor heat exchanger and the outdoor heat exchanger;
a ninth electromagnetic valve (99), one end of which is connected with the first indoor heat exchanger (1), and the other end of which is connected with the first throttling element (7);
and one end of the tenth electromagnetic valve (910) is connected with the second outdoor heat exchanger (6), and the other end of the tenth electromagnetic valve is connected with the first throttling element (7).
6. The assembly according to claim 5, further comprising:
an eleventh solenoid valve (911) and a twelfth solenoid valve (912) connected in series, located on the line between the first outdoor heat exchanger (5) and the first throttling element (7);
and a second throttling element (8) having one end connected to a pipe between the first indoor heat exchanger (1) and the ninth solenoid valve (99) and the other end connected to a pipe between the eleventh solenoid valve (911) and the twelfth solenoid valve (912).
7. The assembly according to claim 1,
the second heat source (10) is a high-temperature heat source and is used for providing a heat source for the second outdoor heat exchanger (6) in a heating mode; wherein, the high-temperature heat source at least comprises one of the following components: solar energy, industrial waste heat and life waste heat.
8. The assembly according to claim 1, further comprising:
the heat storage device is connected with the first outdoor heat exchanger (5) and the second outdoor heat exchanger (6) and is used for recovering heat released by the first outdoor heat exchanger (5) and/or the second outdoor heat exchanger (6) in a refrigeration mode and preparing domestic hot water.
9. An air conditioning unit control method applied to the air conditioning unit according to any one of claims 1 to 8, characterized by comprising:
monitoring whether the heating operation or the refrigerating operation of the air conditioning unit is triggered;
when the heating operation is triggered, judging whether a first heat source and a second heat source can meet the heating requirement, and controlling the air conditioning unit to enter a corresponding heating operation mode according to a judgment result;
and when the refrigeration operation is triggered, detecting the refrigeration demand of the air conditioning unit, and controlling the air conditioning unit to enter a corresponding refrigeration running mode according to the refrigeration demand.
10. The method of claim 9, wherein the heating mode of operation comprises at least: a second heat source individual heating mode, a common heating mode, and a first heat source individual heating mode; controlling the air conditioning unit to enter a corresponding heating operation mode according to the judgment result, comprising the following steps:
when the first heat source and the second heat source can meet the heating requirement, judging the energy consumption of the second heat source independent heating mode, the common heating mode and the first heat source independent heating mode, and controlling the air conditioning unit to enter the heating mode with the minimum energy consumption;
when only the second heat source can meet the heating requirement, controlling the air conditioning unit to enter a second heat source single heating mode;
when only the first heat source can meet the heating requirement, controlling the air conditioning unit to enter a first heat source single heating mode;
and when the first heat source and the second heat source cannot meet the heating requirement, controlling the air conditioning unit to enter the common heating mode.
11. The method of claim 9, wherein the cooling mode of operation comprises at least: a second heat source individual refrigeration mode, a common refrigeration mode, and a first heat source individual refrigeration mode; the refrigeration requirements include at least a high refrigeration requirement and a low refrigeration requirement; controlling the air conditioning unit to enter a corresponding refrigeration running mode according to the refrigeration demand, wherein the refrigeration running mode comprises the following steps:
when the refrigeration demand is the high refrigeration demand, controlling the air conditioning unit to enter the common refrigeration mode;
and when the refrigeration demand is the low refrigeration demand, controlling the air conditioning unit to enter the second heat source independent refrigeration mode or the first heat source independent refrigeration mode.
12. The method of claim 10, wherein controlling the air conditioning unit to enter the second heat source heating only mode comprises:
controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve, the twelfth electromagnetic valve and the tenth electromagnetic valve to be opened;
controlling the fifth electromagnetic valve, the ninth electromagnetic valve, the eighth electromagnetic valve, the eleventh electromagnetic valve, the fourth electromagnetic valve and the third electromagnetic valve to be closed;
and controlling the opening of the second throttling element and the first throttling element.
13. The method of claim 10, wherein controlling the air conditioning unit into the common heating mode comprises:
controlling the seventh electromagnetic valve, the fifth electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve, the eleventh electromagnetic valve, the tenth electromagnetic valve and the third electromagnetic valve to be opened;
controlling the sixth electromagnetic valve, the ninth electromagnetic valve, the eighth electromagnetic valve, the twelfth electromagnetic valve and the fourth electromagnetic valve to be closed;
and controlling the opening of the second throttling element and the first throttling element.
14. The method of claim 10, wherein controlling the air conditioning unit to enter the first heat source only heating mode comprises:
controlling the sixth electromagnetic valve, the fifth electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve, the twelfth electromagnetic valve, the eleventh electromagnetic valve and the third electromagnetic valve to be opened;
controlling the seventh electromagnetic valve, the ninth electromagnetic valve, the eighth electromagnetic valve, the tenth electromagnetic valve and the fourth electromagnetic valve to be closed;
and controlling the opening of the second throttling element and the first throttling element.
15. The method of claim 11, wherein controlling the air conditioning unit to enter the first heat source only cooling mode comprises:
controlling the fifth electromagnetic valve, the first electromagnetic valve, the eighth electromagnetic valve, the twelfth electromagnetic valve, the eleventh electromagnetic valve and the third electromagnetic valve to be opened;
controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the ninth electromagnetic valve, the second electromagnetic valve, the tenth electromagnetic valve and the fourth electromagnetic valve to be closed;
and controlling the opening of the second throttling element and the first throttling element.
16. The method of claim 11, wherein controlling the air conditioning unit into the common cooling mode comprises:
controlling the opening of a fifth electromagnetic valve, a first electromagnetic valve, an eighth electromagnetic valve, an eleventh electromagnetic valve, a tenth electromagnetic valve, a fourth electromagnetic valve and a third electromagnetic valve;
controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the ninth electromagnetic valve, the second electromagnetic valve and the twelfth electromagnetic valve to be closed;
controlling the second throttling element and the first throttling element to be opened;
and controlling the heat storage device to recover part of heat released by the second outdoor heat exchanger.
17. The method of claim 11, wherein controlling the air conditioning unit to enter the second heat source cooling only mode comprises:
controlling the opening of a fifth electromagnetic valve, a first electromagnetic valve, an eighth electromagnetic valve, a twelfth electromagnetic valve, a tenth electromagnetic valve and a fourth electromagnetic valve;
controlling the sixth electromagnetic valve, the seventh electromagnetic valve, the ninth electromagnetic valve, the second electromagnetic valve, the eleventh electromagnetic valve and the third electromagnetic valve to be closed;
controlling the second throttling element and the first throttling element to be opened;
and controlling the heat storage device to recover all heat released by the second outdoor heat exchanger.
18. A storage medium containing computer-executable instructions for performing the air conditioning pack control method of any of claims 9 to 17 when executed by a computer processor.
CN202010963457.8A 2020-09-14 2020-09-14 Air conditioning unit with double heat sources and control method thereof Pending CN112066583A (en)

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