CN113865033B - Control method and device for high-precision direct-expansion heat pump air conditioner - Google Patents
Control method and device for high-precision direct-expansion heat pump air conditioner Download PDFInfo
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- CN113865033B CN113865033B CN202111178845.6A CN202111178845A CN113865033B CN 113865033 B CN113865033 B CN 113865033B CN 202111178845 A CN202111178845 A CN 202111178845A CN 113865033 B CN113865033 B CN 113865033B
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/873—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling refrigerant heaters
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Combustion & Propulsion (AREA)
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method and a device of a high-precision direct-expansion heat pump air conditioner, wherein the control method comprises the following steps: when the high-precision direct-expansion heat pump air conditioner operates, if no heat pump system in a defrosting state exists, at least one heat pump system is kept in an idle state; when the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter the defrosting state, and the heat pump systems which are in the idle state and equal in number to the heat pump systems in the defrosting state are selected to enter the working state; and enabling the heat pump system with the defrosting completed to enter an idle state. The invention can be used for avoiding the influence on the indoor temperature after the heat pump system enters the defrosting state during the defrosting operation of the high-precision direct-expansion heat pump air conditioner, thereby maintaining the constant indoor temperature.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a control method and device of a high-precision direct expansion type heat pump air conditioner.
Background
With the gradual entrance of concepts of dual carbon, energy saving and the like into public centers, air conditioners are an indispensable part in daily life and production all the time, according to survey, the electric energy consumed by air conditioners in ordinary families accounts for about 60% of the total electric quantity of the families each year, in production, some process occasions with requirements on temperature and humidity exist, if fluctuation of the temperature and humidity of the environment occurs, the quality and the production order of products can be directly influenced, therefore, a high-precision air conditioner control system is required to keep the environment in a constant-temperature and constant-humidity state, the energy consumption of the current constant-temperature and constant-humidity air conditioner is huge, and the operating power of the current constant-temperature and constant-humidity air conditioner even exceeds the total power of production equipment. The air source heat pump technology is an energy-saving and environment-friendly heating technology, and a low-temperature heat source is obtained through air heat storage energy. However, when the heat pump air conditioner heats in a low-temperature season, because the outdoor temperature is low and the humidity is high, the surface of the outdoor heat exchanger is easy to frost, and if the defrosting cannot be performed in time, the system heat dissipation is poor, so that the heat pump air conditioner needs to be stopped periodically to defrost when heating at a low temperature so as to ensure that the system can operate normally, and thus the temperature control is unstable when the air conditioning system heats in a low-temperature high-humidity environment.
Therefore, it is important to design a control method of a high-precision direct-expansion heat pump air conditioner that can solve the above problems.
Disclosure of Invention
The invention aims to provide a control method and device of a high-precision direct-expansion type heat pump air conditioner, the high-precision direct-expansion type heat pump air conditioner and a computer readable storage medium, which are beneficial to avoiding the influence on the indoor temperature caused by the heat pump system entering a defrosting state and further maintaining the constant indoor temperature.
In order to achieve the above object, the present invention provides a control method for a high-precision direct-expansion heat pump air conditioner, where the high-precision direct-expansion heat pump air conditioner includes at least two heat pump systems, and the control method includes:
when the high-precision direct-expansion heat pump air conditioner operates, if the heat pump system in a defrosting state does not exist, at least one heat pump system is kept in an idle state;
when the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter a defrosting state, and the heat pump systems which are in an idle state and equal to the heat pump systems in the defrosting state are selected to enter the working state;
and enabling the heat pump system with the defrosting completed to enter an idle state.
Optionally, if the number of the heat pump systems in the working state needs to be kept to be two or more, when the high-precision direct-expansion heat pump air conditioner starts to work, the two or more heat pump systems are controlled to be started at least at intervals of a first preset time, and the first preset time is the set defrosting time of the heat pump systems.
Optionally, the defrost conditions include:
and the time that the temperature of the fins of the heat pump system is lower than the defrosting temperature is greater than or equal to a second preset time.
Optionally, the defrosting temperature increases with the increase of the outdoor environment temperature, and remains unchanged after increasing to a first preset temperature;
the defrosting temperature is reduced along with the reduction of the outdoor environment temperature, and is kept unchanged after being reduced to a second preset temperature.
Optionally, the electric auxiliary heating device is put into an operating state when the heat pump system is in a defrosting state.
Optionally, when the heat pump system is not in a defrosting state, controlling the electric auxiliary heating device to work at a first power;
and when the heat pump system is in a defrosting state, controlling the electric auxiliary heating device to work at a second power higher than the first power.
Optionally, a target number of the heat pump systems is configured according to the indoor temperature and the target temperature, and if the target number is greater than or equal to the number of the heat pump systems, the electric auxiliary heating device is controlled to enter the working state.
To achieve the above object, the present invention also provides a control apparatus of a high-precision direct-expansion type heat pump air conditioner, the high-precision direct-expansion type heat pump air conditioner including at least two heat pump systems, the apparatus including a controller configured to:
when the high-precision direct-expansion heat pump air conditioner operates, if the heat pump system in a defrosting state does not exist, at least one heat pump system is kept in an idle state;
when the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter a defrosting state, and the heat pump systems which are in an idle state and equal in number to the heat pump systems in the defrosting state are selected to enter the working state;
and enabling the heat pump system with the defrosting completed to enter an idle state.
In order to achieve the above object, the present invention further provides a high-precision direct-expansion heat pump air conditioner, comprising:
a processor;
a memory having stored therein executable instructions of the processor;
wherein the processor is configured to execute the control method of the high-precision direct-expansion heat pump air conditioner as described above via execution of the executable instructions.
To achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the high-precision direct-expansion heat pump air conditioner as described above.
The invention also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the high-precision direct-expansion heat pump air conditioner reads the computer instruction from the computer readable storage medium, and the processor executes the computer instruction, so that the high-precision direct-expansion heat pump air conditioner executes the control method of the high-precision direct-expansion heat pump air conditioner.
When the high-precision direct-expansion heat pump air conditioner in operation does not have a heat pump system in a defrosting state, at least one heat pump system is kept in an idle state, when a heat pump system meeting defrosting conditions appears in the heat pump system in the working state, the heat pump system is controlled to enter the defrosting state, the heat pump systems in the idle state are selected to enter the working state, and after the heat pump systems finish defrosting, the heat pump systems are controlled to enter the idle state, so that in the operation process of the high-precision direct-expansion heat pump air conditioner, if the heat pump systems meet the defrosting conditions, the heat pump systems in the idle state can be controlled to enter the working state, the stable output of the high-precision direct-expansion heat pump air conditioner is ensured, the influence on indoor temperature after the heat pump systems enter the defrosting state is avoided, and the constant indoor temperature can be maintained.
Drawings
Fig. 1 is a schematic diagram of the operation of a high-precision direct-expansion heat pump air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic diagram showing the change of the defrosting temperature and the external environment temperature set by the present invention.
Fig. 3 is a schematic diagram of the operation of the high-precision direct-expansion heat pump air conditioner with the auxiliary electric heating device according to the embodiment of the present invention.
Fig. 4 is another schematic diagram of the high-precision direct-expansion heat pump air conditioner with an auxiliary electric heating device according to the embodiment of the present invention.
Fig. 5 is a schematic block diagram of a control device of a high-precision direct-expansion heat pump air conditioner according to an embodiment of the present invention.
Fig. 6 is a schematic block diagram of a high-precision direct-expansion heat pump air conditioner according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Example one
Referring to fig. 1, the present invention discloses a control method for a high-precision direct-expansion heat pump air conditioner, where the high-precision direct-expansion heat pump air conditioner includes at least two heat pump systems, and the control method includes:
when the high-precision direct-expansion heat pump air conditioner operates, if no heat pump system in a defrosting state exists, at least one heat pump system is kept in an idle state.
When the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter the defrosting state, and the heat pump systems which are in the idle state and equal in number to the heat pump systems in the defrosting state are selected to enter the working state.
And enabling the heat pump system after defrosting to enter an idle state.
When the high-precision direct-expansion heat pump air conditioner in operation does not have a heat pump system in a defrosting state, at least one heat pump system is kept in an idle state, when a heat pump system meeting defrosting conditions appears in the heat pump system in the working state, the heat pump system is controlled to enter the defrosting state, the heat pump systems in the idle state are selected to enter the working state, and after the heat pump systems finish defrosting, the heat pump systems are controlled to enter the idle state, so that in the operation process of the high-precision direct-expansion heat pump air conditioner, if the heat pump systems meet the defrosting conditions, the heat pump systems in the idle state can be controlled to enter the working state, the stable output of the high-precision direct-expansion heat pump air conditioner is ensured, the influence on indoor temperature after the heat pump systems enter the defrosting state is avoided, and the constant indoor temperature can be maintained.
Specifically, the high-precision direct-expansion heat pump air conditioner is in an operating state, which refers to a process of heating the high-precision direct-expansion heat pump air conditioner indoors.
In some embodiments, when the high-precision direct-expansion heat pump air conditioner is operated, if the heat pump system in the defrosting state exists, at least one heat pump system can be kept in the idle state.
Specifically, if the number of the heat pump systems in the working state needs to be kept to be two or more, when the high-precision direct-expansion heat pump air conditioner starts to work, the two or more heat pump systems are controlled to be started at least at intervals of a first preset time, and the first preset time is the set defrosting time of the heat pump systems. The defrosting time is the time required by the heat pump systems to maintain the defrosting state, and the heat pump systems are controlled to be started at least at intervals of the first preset time, so that the heat pump systems can be prevented from entering the defrosting state at the same time, and the heat pump systems in the idle state can be prevented from being incapable of sufficiently supplementing the heating power of the high-precision direct-expansion heat pump air conditioner, which is deficient due to the fact that the heat pump systems enter the defrosting state at the same time.
Specifically, the defrosting conditions include: the time that the temperature of the fins of the heat pump system is lower than the defrosting temperature is greater than or equal to a second preset time.
Further, the defrost conditions may also include: the heat pump system maintains the working state for the first time for at least more than a third preset time or keeps the last defrosting at intervals for at least more than a fourth preset time.
Specifically, if the second preset time is 3 minutes, the third preset time is 25 minutes, and the fourth preset time is 45 minutes, when the temperature of the fins is lower than the set defrosting temperature and lasts for 3 minutes, and at this time, the heat pump system heats the indoor for the first time for more than 25 minutes or at least 45 minutes from the last defrosting end, the heat pump system meets the defrosting condition.
Referring to fig. 2, further, the defrosting temperature increases with the increase of the outdoor ambient temperature, and remains unchanged after increasing to the first preset temperature; the defrosting temperature is reduced along with the reduction of the outdoor environment temperature, and is kept unchanged after being reduced to a second preset temperature. As the outdoor ambient temperature increases, the moisture content of the air also increases, the rate of frost formation increases, and the set defrost temperature should also increase. According to the change of the outdoor environment temperature, the corresponding defrosting temperature is set, so that the heat pump system can be prevented from entering a defrosting state in advance or entering the defrosting state in a delayed manner, and the utilization rate of each heat pump system is improved.
Specifically, the first preset temperature should be lower than the frosting temperature at the outdoor air pressure.
Specifically, taking the change of the defrosting temperature with the outdoor environment temperature in fig. 2 as an example, when the outdoor environment temperature is between-15 ℃ and 6 ℃, the defrosting temperature is in positive correlation with the outdoor environment temperature, and when the outdoor environment temperature exceeds 6 ℃, the defrosting temperature is kept at-6 ℃; when the outdoor environment temperature is lower than-15 ℃, the defrosting temperature is kept at-24 ℃.
Specifically, the defrosting method comprises shutdown defrosting and refrigeration defrosting, wherein the refrigeration defrosting needs to refrigerate the indoor space.
Referring to fig. 3, in some embodiments, the electric auxiliary heating device is put into operation when the heat pump system is in the defrosting state. When the high-precision direct-expansion heat pump air conditioner adopts a defrosting method of refrigerating and defrosting, the influence of refrigerating and defrosting of the heat pump system on the indoor temperature can be eliminated by controlling the electric auxiliary heating device to enter the working state, and the influence of hysteresis on the indoor temperature when the heat pump system enters the working state can also be counteracted.
Referring to fig. 4, in some embodiments, when there is no heat pump system in the defrosting state, the electric auxiliary heating device is controlled to operate at the first power; and when the heat pump system is in a defrosting state, controlling the electric auxiliary heating device to work at a second power higher than the first power. By controlling the electric auxiliary heating device to input in advance, when the heat pump system is in a defrosting state, the power of the electric auxiliary heating device is increased, and the influence of defrosting on the indoor temperature of the high-precision direct-expansion heat pump air conditioner can be quickly responded.
Specifically, the conditions for exiting the defrost state include: the time for maintaining the defrosting state is required to be longer than the fifth preset time and the temperature of the fins is required to be higher than the third preset temperature.
Specifically, if the fifth preset time is 2 minutes and the third preset temperature is 15 ℃, when the defrosting state of the heat pump system is maintained for more than 2 minutes and the temperature of the fins is more than 15 ℃, the heat pump system meets the condition of exiting the defrosting state.
In some embodiments, a target number of heat pump systems are configured according to the indoor temperature and the target temperature to enter the working state, and if the target number is greater than or equal to or greater than the number of heat pump systems of the high-precision direct-expansion heat pump air conditioner, the electric auxiliary heating device is controlled to enter the working state. When the target number is larger than or equal to the number of the heat pump systems, the intervention of the electric auxiliary heating device can ensure that the indoor temperature reaches the target temperature under the condition that at least one heat pump system is kept in an idle state.
Specifically, the energy requirement for obtaining the indoor temperature to reach the target temperature can be calculated through a PID algorithm, and the heat pump systems with the target quantity can enter a working state, wherein in order to guarantee the overall operation energy efficiency, the power range of each heat pump system is controlled to be 35% -80%, and the same power of each heat pump system is maintained.
Example two
Referring to fig. 5, the present invention also discloses a control device of a high-precision direct-expansion heat pump air conditioner, the high-precision direct-expansion heat pump air conditioner includes at least two heat pump systems, the device includes a controller 30 configured to:
when the high-precision direct-expansion heat pump air conditioner runs, if no heat pump system in a defrosting state exists, at least one heat pump system is kept in an idle state;
when the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter the defrosting state, and the heat pump systems which are in the idle state and equal in number to the heat pump systems in the defrosting state are selected to enter the working state;
and enabling the heat pump system after defrosting to enter an idle state.
When the heat pump system meets the defrosting condition, the heat pump system in the idle state can be controlled to enter the working state, so that the stable output of the high-precision direct-expansion heat pump air conditioner is ensured, the influence on the indoor temperature after the heat pump system enters the defrosting state is avoided, and the constant indoor temperature can be maintained.
EXAMPLE III
Referring to fig. 6, the present invention also discloses a high-precision direct expansion heat pump air conditioner, including:
a processor 40;
a memory 50 having stored therein executable instructions of the processor 40;
wherein, the processor 40 is configured to execute the control method of the high-precision direct-expansion heat pump air conditioner according to the first embodiment through executing the executable instructions.
Example four
The invention also discloses a computer readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the control method of the high-precision direct-expansion heat pump air conditioner according to the first embodiment.
The embodiment of the invention also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The processor of the high-precision direct-expansion heat pump air conditioner reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the high-precision direct-expansion heat pump air conditioner executes the control method of the high-precision direct-expansion heat pump air conditioner according to the first embodiment.
It should be understood that in the embodiments of the present invention, the Processor may be a Central Processing Unit (CPU), and the Processor may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware associated with computer program instructions, and the program may be stored in a computer readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, so that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
Claims (8)
1. A control method of a high-precision direct-expansion type heat pump air conditioner comprises at least two heat pump systems, and is characterized in that the control method comprises the following steps:
when the high-precision direct-expansion heat pump air conditioner operates, if the heat pump system in a defrosting state does not exist, at least one heat pump system is kept in an idle state;
when the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter the defrosting state, and the heat pump systems which are in the idle state and equal to the heat pump systems in the defrosting state are selected to enter the working state;
enabling the heat pump system with the defrosting completed to enter an idle state;
when the heat pump system is not in a defrosting state, controlling the electric auxiliary heating device to work at a first power;
and when the heat pump system is in a defrosting state, controlling the electric auxiliary heating device to work at a second power higher than the first power.
2. The control method of the high-precision direct-expansion heat pump air conditioner as claimed in claim 1,
if the number of the heat pump systems in the working state needs to be kept to be two or more, when the high-precision direct-expansion heat pump air conditioner starts to work, the two or more heat pump systems are controlled to be started at least at intervals of first preset time, and the first preset time is the set defrosting time of the heat pump systems.
3. The control method of the high-precision direct-expansion heat pump air conditioner as claimed in claim 1,
the defrosting conditions include:
and the time for the temperature of the fins of the heat pump system to be lower than the defrosting temperature is greater than or equal to a second preset time.
4. The control method of the high-precision direct-expansion heat pump air conditioner as claimed in claim 3,
the defrosting temperature is increased along with the increase of the outdoor environment temperature, and is kept unchanged after being increased to a first preset temperature;
the defrosting temperature is reduced along with the reduction of the outdoor environment temperature, and is kept unchanged after being reduced to a second preset temperature.
5. The control method of the high-precision direct-expansion heat pump air conditioner as claimed in claim 1,
and configuring a target number of the heat pump systems to enter a working state according to the indoor temperature and the target temperature, and controlling the electric auxiliary heating device to enter the working state if the target number is greater than or equal to the number of the heat pump systems.
6. A control device of a high-precision direct-expansion heat pump air conditioner, which comprises at least two heat pump systems, is characterized by comprising a controller, wherein the controller is configured to:
when the high-precision direct-expansion heat pump air conditioner operates, if the heat pump system in a defrosting state does not exist, at least one heat pump system is kept in an idle state;
when the heat pump systems in the working state meet the defrosting condition, the heat pump systems are controlled to enter a defrosting state, and the heat pump systems which are in an idle state and equal to the heat pump systems in the defrosting state are selected to enter the working state;
enabling the heat pump system with the defrosting completed to enter an idle state;
when the heat pump system is not in a defrosting state, controlling the electric auxiliary heating device to work at a first power;
and when the heat pump system is in a defrosting state, controlling the electric auxiliary heating device to work at a second power higher than the first power.
7. The utility model provides a formula heat pump air conditioner directly expands of high accuracy which characterized in that includes:
a processor;
a memory having stored therein executable instructions of the processor;
wherein the processor is configured to execute the control method of the high-precision direct-expansion heat pump air conditioner according to any one of claims 1 to 5 through execution of the executable instructions.
8. A computer-readable storage medium on which a computer program is stored, wherein the computer program, when executed by a processor, implements the control method of a high-precision direct-expansion heat pump air conditioner according to any one of claims 1 to 5.
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| JPH0674531A (en) * | 1992-04-10 | 1994-03-15 | Sanyo Electric Co Ltd | Air-conditioner |
| JPH07332816A (en) * | 1994-06-07 | 1995-12-22 | Daikin Ind Ltd | Heat pump refrigerator |
| JP2013015262A (en) * | 2011-07-04 | 2013-01-24 | Mitsubishi Electric Corp | Air conditioning system |
| CN110749041A (en) * | 2019-11-01 | 2020-02-04 | 宁波奥克斯电气股份有限公司 | Operation control method and system of air conditioner, air conditioner and storage medium |
| CN110849020A (en) * | 2019-11-26 | 2020-02-28 | 中国扬子集团滁州扬子空调器有限公司 | Heat pump type air conditioner and control method thereof |
| CN113154522A (en) * | 2021-04-25 | 2021-07-23 | 珠海格力电器股份有限公司 | Multi-connected air conditioner system and defrosting control method |
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