CN110906503A - Air conditioner heating control method and device and air conditioner - Google Patents

Air conditioner heating control method and device and air conditioner Download PDF

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Publication number
CN110906503A
CN110906503A CN201911080743.3A CN201911080743A CN110906503A CN 110906503 A CN110906503 A CN 110906503A CN 201911080743 A CN201911080743 A CN 201911080743A CN 110906503 A CN110906503 A CN 110906503A
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China
Prior art keywords
heat exchangers
compressor
refrigerant
heating
air conditioner
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Granted
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CN201911080743.3A
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Chinese (zh)
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CN110906503B (en
Inventor
曹勋
张仕强
焦华超
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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 CN201911080743.3A priority Critical patent/CN110906503B/en
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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
    • F24F11/32—Responding to malfunctions or emergencies
    • 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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application relates to an air conditioner heating control method and device and an air conditioner, and belongs to the technical field of air conditioners. The application includes: receiving a heating operation instruction; and in response to the heating operation instruction, prohibiting the refrigerant stored in part of the heat exchangers of the outdoor unit from entering the compressor, and simultaneously allowing the refrigerant stored in the rest of the heat exchangers of the outdoor unit to enter the compressor, so that the compressor is started for heating by using the refrigerant flowing out of the rest of the heat exchangers. Through the application, the reliability of high-frequency operation of the compressor is guaranteed in a low-temperature environment, refrigerant circulation is accelerated, and the heating effect and the heating speed of the air-conditioning system in the heating starting operation stage are improved.

Description

Air conditioner heating control method and device and air conditioner
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to an air conditioner heating control method and device and an air conditioner.
Background
In winter, the multi-split air conditioning system can be used for heating through an air conditioner, is mostly installed in public places such as office buildings, markets and the like, and is characterized in that the multi-split air conditioning system is used in the daytime and is in standby at night. In cold winter, the outdoor temperature is very low at night, the refrigerant in the air conditioning system in a standby state is gathered in the outdoor heat exchanger, when the second sky is started, a large amount of liquid refrigerant enters the compressor, the liquid impact and the heating effect of the compressor are poor, the problem can be solved by reducing the frequency of the compressor, and the heating rate is greatly reduced in the solving mode.
Disclosure of Invention
In order to overcome the problems in the related art at least to a certain extent, the application provides the air conditioner heating control method, the air conditioner heating control device and the air conditioner, which are beneficial to ensuring the reliability of high-frequency operation of the compressor in a low-temperature environment, accelerating the refrigerant circulation and further improving the heating effect and the heating speed of the air conditioning system in the heating starting operation stage.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
the application provides an air conditioner heating control method, which comprises the following steps:
receiving a heating operation instruction;
and in response to the heating operation instruction, prohibiting refrigerants stored in part of the heat exchangers of the outdoor unit from entering the compressor, and allowing refrigerants stored in the other heat exchangers of the outdoor unit to enter the compressor, so that the compressor is started for heating by using the refrigerants flowing out of the other heat exchangers.
Further, while the step of prohibiting the refrigerant stored in the partial heat exchanger of the outdoor unit from entering the compressor is executed, the method further includes:
and the refrigerant is prohibited from entering the part of the heat exchanger.
Further, the method further comprises:
acquiring the operating frequency of the compressor;
and when the compressor continuously operates at the highest operating frequency for a first preset time length, controlling the refrigerant stored in the partial heat exchangers to enter the compressor for heating.
Further, if the air conditioner is a multi-split air conditioner, when the compressor continuously operates at the highest operating frequency for a first preset time length, the method controls the refrigerant stored in the partial heat exchanger to enter the compressor to participate in heating, and includes:
when the compressor continuously operates for the first preset time length according to the highest operating frequency, controlling the refrigerant stored in the partial heat exchangers to enter the compressor, wherein the electronic expansion valves corresponding to the partial heat exchangers are opened to an initial opening degree;
judging whether the heating operation reaches a preset condition or not;
and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is up, regulating and controlling the opening degrees of the electronic expansion valves corresponding to the partial heat exchangers according to a normal heating mode, and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is not up, controlling the electronic expansion valves corresponding to the partial heat exchangers to be kept at the initial opening degrees.
Further, the judging whether the heating operation reaches a preset condition includes:
acquiring the exhaust superheat degree of the compressor, and judging that the heating operation reaches the preset condition when the exhaust superheat degree continuously exceeds a preset threshold superheat degree for a second preset time; alternatively, the first and second electrodes may be,
and acquiring the heating operation time of the air conditioner, and judging that the heating operation reaches the preset condition when the heating operation time exceeds the preset threshold time.
Further, the method further comprises:
receiving a standby instruction;
in response to the standby instruction, prohibiting the refrigerant from entering the rest of the heat exchangers, allowing the refrigerant to enter the partial heat exchangers, and prohibiting the refrigerant from flowing out of the partial heat exchangers;
acquiring outdoor temperature;
and controlling the refrigerant to enter the partial heat exchangers according to the change condition of the outdoor temperature.
Further, the controlling the refrigerant to migrate into the partial heat exchanger according to the change condition of the outdoor temperature includes:
according to a preset detection period, calculating to obtain an outdoor temperature average value in each detection period, if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is smaller than a preset value, allowing the refrigerant to enter the partial heat exchangers, and if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is larger than or equal to the preset value, forbidding the refrigerant to enter the partial heat exchangers.
In a second aspect of the present invention,
the application provides an air conditioner heating control device, includes:
the first receiving module is used for receiving a heating operation instruction;
the first response control module is used for responding to the heating operation instruction, forbidding the refrigerants stored in part of the heat exchangers of the outdoor unit from entering the compressor, and allowing the refrigerants stored in the other heat exchangers of the outdoor unit to enter the compressor, so that the compressor is started by heating by using the refrigerants flowing out of the other heat exchangers.
In a third aspect,
the application provides an air conditioner, includes:
the outdoor unit is provided with a plurality of heat exchangers which are arranged in parallel, an electronic expansion valve is correspondingly arranged on a refrigerant inlet side pipeline of each radiator, and electromagnetic valves are also arranged on refrigerant outlet side pipelines of partial heat exchangers;
a controller configured to control the electronic expansion valve and the solenoid valve to implement the steps of the method as claimed in any one of the above.
Further, the outdoor unit has two radiators.
Further, the air conditioner is a multi-split air conditioner.
This application adopts above technical scheme, possesses following beneficial effect at least:
when the control receiving heating operation instruction is operated, refrigerants stored in part of heat exchangers of the outdoor unit are forbidden to enter the compressor, and the refrigerant flowing out of the other heat exchangers of the outdoor unit is utilized to perform heating starting.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a heating control method of an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic view illustrating a flow path structure of an outdoor unit of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a heating control method of an air conditioner according to another embodiment of the present application;
fig. 4 is a schematic flowchart of a heating control method of an air conditioner according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of an air-conditioning heating control device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic flow chart of an air-conditioning heating control method according to an embodiment of the present application, and as shown in fig. 1, the air-conditioning heating control method includes the following steps:
step S101, receiving a heating operation instruction;
and step S102, in response to the heating operation instruction, prohibiting refrigerants stored in part of the heat exchangers of the outdoor unit from entering the compressor, and allowing refrigerants stored in the other heat exchangers of the outdoor unit to enter the compressor, so that the compressor is started for heating by using the refrigerants flowing out of the other heat exchangers.
Specifically, a user may send a heating operation instruction to the air conditioner through the air conditioner remote controller, so that the air conditioner receives the heating operation instruction.
The following is described with reference to specific examples. As shown in fig. 2, fig. 2 is a schematic view of a flow path structure of an outdoor unit of an air conditioner according to an embodiment of the present invention, in which an outdoor unit 21 is provided with a first heat exchanger 201 and a second heat exchanger 202 which are arranged in parallel, and a refrigerant inlet side pipe of each heat sink is correspondingly provided with an electronic expansion valve (203, 204), wherein the refrigerant inlet side pipe of the first heat exchanger 201 is correspondingly provided with the first electronic expansion valve 203, the refrigerant inlet side pipe of the second heat exchanger 202 is correspondingly provided with the second electronic expansion valve 204, and a refrigerant outlet side pipe of the first heat exchanger 201 is further provided with an electromagnetic valve 205. The following control can be performed according to the steps (the arrow in fig. 2 indicates the flow direction of the refrigerant during heating): the air conditioner responds to a heating operation instruction, controls the solenoid valve 205 on the refrigerant outflow side pipeline of the first heat exchanger 201 to close, so as to prohibit part of the refrigerant stored in the heat exchanger of the outdoor unit from entering the compressor, and simultaneously controls the electronic expansion valve 204 corresponding to the second heat exchanger 202 to open, so as to allow the refrigerant stored in the other heat exchangers of the outdoor unit to enter the compressor 206, under the control state, a part of the refrigerant in the refrigerant system is resided in the first heat exchanger 201, after the compressor 206 is started to operate, the refrigerant resided in the first heat exchanger 201 does not participate in heating start, the compressor 206 is heated to start by using the refrigerant flowing out of the second heat exchanger 202, thereby being beneficial to solving the liquid impact problem of the compressor 206 under low temperature environment, ensuring the reliability of high-frequency operation of the compressor 206, and further being beneficial to accelerating the refrigerant circulation of the compressor 206 by improving the operation frequency, the heating effect and the heating speed of the air conditioning system in the heating starting operation stage are improved.
In addition, fig. 2 also shows a four-way valve 207, an oil-liquid separator 208, a gas-liquid separator 209, a temperature sensor 210 and a pressure sensor 211, and for the components shown in fig. 2, reference can be made to the functional roles of the corresponding components in the related refrigerant system technology.
Further, while the step of prohibiting the refrigerant stored in the partial heat exchanger of the outdoor unit from entering the compressor is executed, the method further includes:
and the refrigerant is prohibited from entering the part of the heat exchanger.
Specifically, as shown in fig. 2, in response to a heating operation instruction, the air conditioner controls the electromagnetic valve 205 on the refrigerant outflow side pipeline of the first heat exchanger 201 to be closed, and also controls the first electronic expansion valve corresponding to the first heat exchanger 201 to be closed 203, and in this further control state, when the air conditioning system is started for heating, the refrigerant in the circulation flow path does not continue to enter the first heat exchanger 201, which is helpful to ensure the stability of the control of the second electronic expansion valve 204 corresponding to the second heat exchanger 202 during the refrigerant circulation in the heating start stage.
Fig. 3 is a schematic flowchart of an air-conditioning heating control method according to another embodiment of the present application, and as shown in fig. 3, the air-conditioning heating control method includes the following steps:
step S301, receiving a heating operation instruction;
step S302, in response to the heating operation instruction, prohibiting the refrigerant stored in part of the heat exchangers of the outdoor unit from entering the compressor 206, and allowing the refrigerant stored in the other heat exchangers of the outdoor unit to enter the compressor 206, so that the compressor 206 performs heating start by using the refrigerant flowing out of the other heat exchangers.
Step S303, acquiring the operating frequency of the compressor 206;
step S304, when the compressor 206 continuously operates at the highest operating frequency for a first preset time, controlling the refrigerant stored in the part of the heat exchangers to enter the compressor 206 to participate in heating.
Specifically, for step S301 to step S302, corresponding descriptions are already provided in the above related embodiments, and details are not described herein, and for step S303 to step S304, in a specific application, in order to improve the heating effect and the heating rate in the heating start operation stage of the air conditioning system, after the compressor 206 is started to operate, the frequency operation may be continuously increased until the maximum frequency is increased. When the compressor 206 continuously operates at the highest operating frequency for a first preset time, for example, when the compressor 206 continuously operates at the highest operating frequency for 10 minutes, the purpose of rapid heating in the start-up operation stage can be achieved, and before reaching the first preset time, as shown in fig. 2, the refrigerant in the first heat exchanger 201 does not participate in heating. On the basis of achieving the purpose of rapid heating, in order to increase the heat absorption capacity of the evaporator and increase the refrigerant circulation amount, it is necessary to control the refrigerant residing in the first heat exchanger 201 to enter the compressor 206 to participate in heating, as shown in fig. 2, in practical application, it is necessary to control the solenoid valve 205 to be opened and control the first electronic expansion valve 203 to be opened so as to allow the refrigerant residing in the first heat exchanger 201 to participate in the heating cycle.
As to step S304, in a specific embodiment, if the air conditioner is a multi-split air conditioner, the controlling the refrigerant stored in the partial heat exchanger to enter the compressor 206 to participate in heating when the compressor 206 continuously operates at the highest operating frequency for a first preset time duration includes:
when the compressor 206 continuously operates at the highest operating frequency for the first preset duration, controlling the refrigerant stored in the partial heat exchangers to enter the compressor 206, wherein the electronic expansion valves corresponding to the partial heat exchangers are opened to an initial opening;
judging whether the heating operation reaches a preset condition or not;
and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is up, regulating and controlling the opening degrees of the electronic expansion valves corresponding to the partial heat exchangers according to a normal heating mode, and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is not up, controlling the electronic expansion valves corresponding to the partial heat exchangers to be kept at the initial opening degrees.
Specifically, the multi-split air conditioner is provided with a plurality of indoor units for one outdoor unit, the outdoor unit of the multi-split air conditioner is selected according to the state that the indoor units are simultaneously opened, and when the starting capacity of the indoor units is small, the circulation of a system refrigerant is poor, and the outdoor unit of the multi-split air conditioner is also in a heating state. In contrast, when the refrigerant staying before is released to participate in heating, the heating start operation of the multi-split air conditioner needs to be further controlled as described above in order to coordinate the refrigerant circulation performance and the heating effect.
Further, the judging whether the heating operation reaches a preset condition includes:
acquiring the exhaust superheat degree of the compressor 206, and judging that the heating operation reaches the preset condition when the exhaust superheat degree continuously exceeds a preset threshold superheat degree for a second preset time; alternatively, the first and second electrodes may be,
and acquiring the heating operation time of the air conditioner, and judging that the heating operation reaches the preset condition when the heating operation time exceeds the preset threshold time.
Specifically, the preset condition is a judgment condition for when to switch to normal heating mode control after the electronic expansion valves corresponding to the partial heat exchangers are opened to the initial opening degree. For obtaining the exhaust superheat degree of the compressor 206, when the exhaust superheat degree continues for a second preset duration and exceeds a preset threshold superheat degree, judging that the heating operation reaches the preset condition, and accurately grasping the transfer time; and for the obtained air conditioner heating operation time length, when the heating operation time length exceeds the preset threshold value time length, the heating operation is judged to reach the preset condition, and the control can be switched to the normal heating mode at regular time under the condition that the exhaust superheat degree of the compressor 206 is out of the problem.
Fig. 4 is a schematic flowchart of a heating control method of an air conditioner according to another embodiment of the present application, and as shown in fig. 4, the heating control method of the air conditioner includes the following steps:
step S401, receiving a heating operation instruction;
step S402, in response to the heating operation instruction, prohibiting the refrigerant stored in part of the heat exchangers of the outdoor unit from entering the compressor 206, and allowing the refrigerant stored in the other heat exchangers of the outdoor unit to enter the compressor 206, so that the compressor 206 performs heating start by using the refrigerant flowing out of the other heat exchangers.
Step S403, acquiring an operating frequency of the compressor 206;
step S404, when the compressor 206 continuously operates at the highest operating frequency for a first preset time, controlling the refrigerant stored in the partial heat exchanger to enter the compressor 206 to participate in heating; and waits to proceed to step S405;
step S405, receiving a standby instruction;
step S406, in response to the standby instruction, prohibiting the refrigerant from entering the rest of the heat exchangers, allowing the refrigerant to enter the partial heat exchangers, and prohibiting the refrigerant from flowing out of the partial heat exchangers;
step S407, acquiring outdoor temperature;
step S408, controlling the refrigerant to enter the partial heat exchangers according to the change condition of the outdoor temperature; and waits to shift to execution of step S401.
Specifically, as shown in fig. 2, in response to a standby instruction, the air conditioner controls the solenoid valve 205 on the refrigerant outflow side pipeline of the first heat exchanger 201 to close, controls the first electronic expansion valve 203 corresponding to the first heat exchanger 201 to open, and also controls the second electronic expansion valve 204 corresponding to the second heat exchanger 202 to close, in the above control state, the refrigerant cannot enter the second heat exchanger 202, in the standby state, the compressor 206 stops operating, and as the temperature decreases, the refrigerant in the refrigerant circulation flow path migrates toward the outdoor unit, migrates into the first heat exchanger 201 to reside, the temperature decreases, migrates into the first heat exchanger 201 to increase correspondingly, and as the temperature increases, the refrigerant residing in the first heat exchanger 201 migrates a certain amount with the temperature increase, for the purpose of making the first heat exchanger 201 reside and store more refrigerant as much as possible, the starting stage to be heated does not participate in heating, the reliability of high-frequency operation of the compressor 206 in a low-temperature environment is guaranteed, the heating effect and speed of the heating starting operation stage of the air conditioning system are guaranteed to be improved, and the refrigerant can be controlled to enter the partial heat exchangers according to the change condition of the outdoor temperature.
Further, the controlling the refrigerant to migrate into the partial heat exchanger according to the change condition of the outdoor temperature includes:
according to a preset detection period, calculating to obtain an outdoor temperature average value in each detection period, if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is smaller than a preset value, allowing the refrigerant to enter the partial heat exchangers, and if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is larger than or equal to the preset value, forbidding the refrigerant to enter the partial heat exchangers.
Specifically, as will be described below with reference to a specific application shown in fig. 2, in the standby state of the air conditioner, the solenoid valve 205 on the refrigerant outflow side pipe of the first heat exchanger 201 is closed, the first electronic expansion valve 203 corresponding to the first heat exchanger 201 is opened, and the second electronic expansion valve 204 corresponding to the second heat exchanger 202 is closed. Taking the preset detection period as one hour as an example, calculating every hour to obtain an outdoor temperature mean value recorded as T1、T2……TnWherein n is more than 2, judging Tn-Tn-1Whether the temperature is less than or equal to minus 5 ℃ is established, and if the temperature is established each time, the first electronic expansion corresponding to the first heat exchanger 201 is keptThe expansion valve 203 is opened, and when the expansion valve is not established, the first electronic expansion valve 203 corresponding to the first heat exchanger 201 is closed.
Fig. 5 is a schematic structural diagram of an air-conditioning heating control device according to an embodiment of the present application, and as shown in fig. 5, the air-conditioning heating control device 5 includes:
a first receiving module 501, configured to receive a heating operation instruction;
the first control module 502 is configured to, in response to the heating operation instruction, prohibit a refrigerant stored in a part of heat exchangers of the outdoor unit from entering the compressor 206, and allow a refrigerant stored in the other heat exchangers of the outdoor unit to enter the compressor 206, so that the compressor 206 performs heating start by using the refrigerant flowing out of the other heat exchangers.
Further, the first control module 502 is further configured to:
the step of prohibiting the refrigerant stored in the partial heat exchanger of the outdoor unit from entering the compressor 206 is performed, and meanwhile, the refrigerant is prohibited from entering the partial heat exchanger.
Further, the air-conditioning heating control device 5 further includes:
a first obtaining module 503, configured to obtain an operating frequency of the compressor 206;
the second control module 504 is configured to control the refrigerant stored in the part of the heat exchangers to enter the compressor 206 to participate in heating when the compressor 206 continuously operates at the highest operating frequency for a first preset duration.
Further, if the air conditioner is a multi-split air conditioner, the second control module 504 is specifically configured to:
when the compressor 206 continuously operates at the highest operating frequency for the first preset duration, controlling the refrigerant stored in the partial heat exchangers to enter the compressor 206, wherein the electronic expansion valves corresponding to the partial heat exchangers are opened to an initial opening;
judging whether the heating operation reaches a preset condition or not;
and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is up, regulating and controlling the opening degrees of the electronic expansion valves corresponding to the partial heat exchangers according to a normal heating mode, and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is not up, controlling the electronic expansion valves corresponding to the partial heat exchangers to be kept at the initial opening degrees.
Further, the judging whether the heating operation reaches a preset condition includes:
acquiring the exhaust superheat degree of the compressor 206, and judging that the heating operation reaches the preset condition when the exhaust superheat degree continuously exceeds a preset threshold superheat degree for a second preset time; alternatively, the first and second electrodes may be,
and acquiring the heating operation time of the air conditioner, and judging that the heating operation reaches the preset condition when the heating operation time exceeds the preset threshold time.
Further, the air-conditioning heating control device 5 further includes:
a second receiving module 505, configured to receive a standby instruction;
the third control module 506 is configured to, in response to the standby instruction, prohibit the refrigerant from entering the remaining heat exchangers, allow the refrigerant to enter the partial heat exchangers, and prohibit the refrigerant from flowing out of the partial heat exchangers;
a second obtaining module 507, configured to obtain an outdoor temperature;
and the fourth control module 508 is configured to control the refrigerant to enter the part of the heat exchangers according to a change condition of the outdoor temperature.
Further, the controlling the refrigerant to migrate into the partial heat exchanger according to the change condition of the outdoor temperature includes:
according to a preset detection period, calculating to obtain an outdoor temperature average value in each detection period, if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is smaller than a preset value, allowing the refrigerant to enter the partial heat exchangers, and if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is larger than or equal to the preset value, forbidding the refrigerant to enter the partial heat exchangers.
With regard to the air-conditioning heating control device 5 in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
As shown in fig. 2 and 6, the present application provides an air conditioner 2 including:
the outdoor unit 21 is provided with a plurality of heat exchangers (201, 202), the heat exchangers are arranged in parallel, an electronic expansion valve (203, 204) is correspondingly arranged on a refrigerant inlet side pipeline of each radiator, and an electromagnetic valve 205 is also arranged on a refrigerant outlet side pipeline of part of the heat exchangers (201);
a controller 22 configured to control the electronic expansion valves (203, 204) and the solenoid valve 205 to implement the steps of the method according to any one of the above.
Further, the outdoor unit has two radiators.
Further, the air conditioner is a multi-split air conditioner.
With regard to the air conditioner 2 in the above-described embodiment, the specific manner in which the respective components perform operations has been described in detail in the embodiment related to the method, and will not be explained in detail here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Further, "connected" as used herein may include wirelessly connected. The term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (11)

1. An air conditioner heating control method is characterized by comprising the following steps:
receiving a heating operation instruction;
and in response to the heating operation instruction, prohibiting refrigerants stored in part of the heat exchangers of the outdoor unit from entering the compressor, and allowing refrigerants stored in the other heat exchangers of the outdoor unit to enter the compressor, so that the compressor is started for heating by using the refrigerants flowing out of the other heat exchangers.
2. The method as claimed in claim 1, wherein the step of prohibiting the refrigerant stored in the partial heat exchanger of the outdoor unit from entering the compressor is performed, and the method further comprises:
and the refrigerant is prohibited from entering the part of the heat exchanger.
3. The method of claim 1, further comprising:
acquiring the operating frequency of the compressor;
and when the compressor continuously operates at the highest operating frequency for a first preset time length, controlling the refrigerant stored in the partial heat exchangers to enter the compressor for heating.
4. The method as claimed in claim 3, wherein if the air conditioner is a multi-split air conditioner, controlling the refrigerant stored in the partial heat exchanger to enter the compressor for heating when the compressor continuously operates at the highest operating frequency for a first preset time period comprises:
when the compressor continuously operates for the first preset time length according to the highest operating frequency, controlling the refrigerant stored in the partial heat exchangers to enter the compressor, wherein the electronic expansion valves corresponding to the partial heat exchangers are opened to an initial opening degree;
judging whether the heating operation reaches a preset condition or not;
and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is up, regulating and controlling the opening degrees of the electronic expansion valves corresponding to the partial heat exchangers according to a normal heating mode, and if the opening degree of the electronic expansion valves corresponding to the partial heat exchangers is not up, controlling the electronic expansion valves corresponding to the partial heat exchangers to be kept at the initial opening degrees.
5. The method of claim 4, wherein the determining whether the heating operation meets the preset condition comprises:
acquiring the exhaust superheat degree of the compressor, and judging that the heating operation reaches the preset condition when the exhaust superheat degree continuously exceeds a preset threshold superheat degree for a second preset time; alternatively, the first and second electrodes may be,
and acquiring the heating operation time of the air conditioner, and judging that the heating operation reaches the preset condition when the heating operation time exceeds the preset threshold time.
6. The method according to any one of claims 1-5, further comprising:
receiving a standby instruction;
in response to the standby instruction, prohibiting the refrigerant from entering the rest of the heat exchangers, allowing the refrigerant to enter the partial heat exchangers, and prohibiting the refrigerant from flowing out of the partial heat exchangers;
acquiring outdoor temperature;
and controlling the refrigerant to enter the partial heat exchangers according to the change condition of the outdoor temperature.
7. The method as claimed in claim 5, wherein the controlling of the refrigerant migration into the portion of the heat exchanger according to the outdoor temperature variation comprises:
according to a preset detection period, calculating to obtain an outdoor temperature average value in each detection period, if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is smaller than a preset value, allowing the refrigerant to enter the partial heat exchangers, and if the outdoor temperature average value obtained by subtracting the last detection period from the outdoor temperature average value obtained by the next detection period is larger than or equal to the preset value, forbidding the refrigerant to enter the partial heat exchangers.
8. An air conditioner heating control device, characterized by comprising:
the first receiving module is used for receiving a heating operation instruction;
the first response control module is used for responding to the heating operation instruction, forbidding the refrigerants stored in part of the heat exchangers of the outdoor unit from entering the compressor, and allowing the refrigerants stored in the other heat exchangers of the outdoor unit to enter the compressor, so that the compressor is started by heating by using the refrigerants flowing out of the other heat exchangers.
9. An air conditioner, comprising:
the outdoor unit is provided with a plurality of heat exchangers which are arranged in parallel, an electronic expansion valve is correspondingly arranged on a refrigerant inlet side pipeline of each radiator, and electromagnetic valves are also arranged on refrigerant outlet side pipelines of partial heat exchangers;
a controller configured to control the electronic expansion valve and the solenoid valve to implement the steps of the method according to any of claims 1-7.
10. The air conditioner of claim 9, wherein the outdoor unit has two radiators.
11. The air conditioner according to claim 9 or 10, wherein the air conditioner is a multi-split air conditioner.
CN201911080743.3A 2019-11-07 2019-11-07 Air conditioner low-temperature heating control method and device and air conditioner Active CN110906503B (en)

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