CN112923506B - Refrigerant recovery control method and device and air conditioner - Google Patents

Refrigerant recovery control method and device and air conditioner Download PDF

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Publication number
CN112923506B
CN112923506B CN202110214192.6A CN202110214192A CN112923506B CN 112923506 B CN112923506 B CN 112923506B CN 202110214192 A CN202110214192 A CN 202110214192A CN 112923506 B CN112923506 B CN 112923506B
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China
Prior art keywords
air conditioner
refrigerant recovery
expansion valve
refrigerant
preset time
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CN202110214192.6A
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CN112923506A (en
Inventor
钱益
曾友坚
强兵罗
罗安发
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to a refrigerant recovery control method and device and an air conditioner, and belongs to the field of intelligent control of air conditioners. The refrigerant recovery control method comprises the following steps: receiving a refrigerant recovery instruction; controlling the air conditioner to perform refrigeration operation for a first preset time and then closing the expansion valve to recover the refrigerant; and opening the expansion valve to enable the air conditioner to recover the refrigeration operation under the condition that the air conditioner is not shut down within the second preset time after the refrigerant recovery is finished. The refrigerant recovery control device is used for controlling the air conditioner to realize the refrigerant recovery control method. The air conditioner and the corresponding refrigerant recovery control method and device can close the expansion valve after refrigeration operation for a certain time after receiving a refrigerant recovery instruction input by a related operator, thereby realizing automatic recovery of the refrigerant and having simple and convenient operation. In addition, the air conditioner can also effectively correct misoperation of related operators, thereby avoiding self failure and ensuring self normal operation.

Description

Refrigerant recovery control method and device and air conditioner
Technical Field
The invention relates to the field of intelligent control of air conditioners, in particular to a refrigerant recovery control method, a refrigerant recovery control device and an air conditioner.
Background
When the air conditioner is used, the disassembly and assembly machine is needed when the air conditioner is moved. Before the machine is disassembled, the refrigerant needs to be recycled. Before the refrigerant is recovered, the air conditioner needs to be started in a refrigeration mode, a tool is used for manually closing a liquid outlet pipe (a small stop valve) of an air conditioner external unit, and after the compressor runs for a period of time, a gas return pipe (a large stop valve) is closed to recover the refrigerant.
However, the conventional refrigerant recovery method has the problem of complicated and inconvenient operation because the manual operation is required twice.
Disclosure of Invention
The invention solves the problem that the refrigerant recovery operation of the prior air conditioner is inconvenient.
In order to solve the above-mentioned problems,
in a first aspect, the present invention provides a refrigerant recovery control method, including:
receiving a refrigerant recovery instruction;
controlling the air conditioner to perform refrigeration operation for a first preset time and then closing the expansion valve to recover the refrigerant;
and opening the expansion valve to enable the air conditioner to recover the refrigeration operation under the condition that the air conditioner is not shut down within the second preset time after the refrigerant recovery is finished.
The refrigerant recovery control method can control the air conditioner to refrigerate for a certain time and then close the expansion valve after receiving the refrigerant recovery instruction input by related operators, thereby realizing the automatic recovery of the refrigerant and having simple and convenient operation. And the refrigerant recovery control method can also effectively correct misoperation of related operators, and after the refrigerant recovery is finished for a certain time, if the related operators do not close the air conditioner, the description shows that the refrigerant recovery instruction is possibly input due to misoperation, and at the moment, the refrigerant recovery control method can control the expansion valve to open to enable the air conditioner to recover refrigeration, so that the air conditioner is prevented from being out of order, and the normal operation of the air conditioner is ensured.
In an optional embodiment, the first preset time is 5min to 15min, and the second preset time is 2min to 4 min.
In an alternative embodiment, the step of controlling the cooling operation of the air conditioner includes:
controlling the air conditioner to automatically refrigerate and run under the condition that the indoor environment temperature is greater than or equal to a first preset temperature;
and controlling the forced cooling operation of the air conditioner under the condition that the indoor environment temperature is lower than the first preset temperature.
In an alternative embodiment, after the step of controlling the air-conditioning cooling operation for the first preset time, before the step of closing the expansion valve, the method further includes:
acquiring a first outlet air temperature of an air conditioner;
after the step of closing the expansion valve, the method further comprises the following steps:
continuously acquiring a second air outlet temperature of the air conditioner and the running time of the air conditioner after the expansion valve is closed;
and under the condition that the absolute value of the difference value between the second air outlet temperature and the first air outlet temperature is greater than a second preset temperature and a fourth preset time is maintained, or under the condition that the running time of the air conditioner after the expansion valve is closed is greater than or equal to a third preset time, judging that the refrigerant recovery of the air conditioner is finished and sending prompt information.
After the expansion valve is closed, the air outlet temperature of the air conditioner rises, so the control method sets the temperature condition, and can effectively judge whether the refrigerant recovery is finished by judging whether the absolute value of the difference of the air outlet temperatures before and after the air conditioner closes the expansion valve exceeds the second preset temperature. However, under some special conditions (for example, a temperature sensor fails, the indoor ambient temperature is too low, etc.), even if the refrigerant is completely recovered, the absolute value of the difference between the outlet air temperatures before and after the expansion valve is closed cannot exceed the second preset temperature, so the control method also sets a time condition, and when the running time of the air conditioner after the expansion valve is closed exceeds the third preset time, the completion of the refrigerant recovery is directly judged. When the refrigerant recovery is judged to be completed, prompt information is sent out so that relevant operators can perform corresponding operations, such as power-off disassembly and the like.
In an optional embodiment, the second preset temperature is 3 ℃ to 5 ℃, the third preset time is 3min to 5min, and the fourth preset time is 1min to 3 min.
In an optional embodiment, the step of sending out the prompt message includes:
controlling a display panel of the air conditioner to display a prompt symbol;
or controlling a buzzer of the air conditioner to sound continuously;
or, the display panel of the air conditioner is controlled to display a prompt symbol, and the buzzer is controlled to sound continuously.
In an optional embodiment, when the step of "sending out a prompt message" includes controlling a display panel of an air conditioner to display a prompt symbol, the method further includes, when the air conditioner is not turned off within a second preset time after the refrigerant recovery is completed:
turning off a display panel of the air conditioner;
when the step of "sending out the prompt information" includes that the buzzer of the air conditioner is controlled to sound continuously, the method further comprises the following steps that in a second preset time after the completion of the refrigerant recovery, the air conditioner is not shut down:
controlling the buzzer to sound intermittently;
when the step of "sending out the prompting message" includes that the display panel of control air conditioner shows the notice symbol, when control bee calling organ lasts the sound production, in the second time of predetermineeing after the refrigerant is retrieved the air conditioner does not have the circumstances of shutting down, still include:
and closing a display panel of the air conditioner and controlling a buzzer to sound intermittently.
In an alternative embodiment, after the step of opening the expansion valve to restore the air conditioner to the cooling operation, the method further comprises:
repeatedly executing the step of closing the expansion valve to recover the refrigerant after controlling the air conditioner to refrigerate and run for the first preset time;
and after the preset times of repeated execution, controlling the air conditioner to stop the refrigerant recovery under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is finished.
Under normal conditions, if the relevant operator inputs the refrigerant recovery command due to an operation error, the relevant operator turns off the air conditioner within a certain time after the refrigerant recovery is finished after the operation of automatically recovering the refrigerant is repeatedly executed once or twice. If the air conditioner is not closed by related operators within a certain time after the operation of automatically recovering the refrigerant is repeated for multiple times, the refrigerant recovery instruction is probably triggered by the related operators by mistake, and the air conditioner is recovered to normal operation at the moment and does not perform the operation of recovering the refrigerant.
In a second aspect, the present invention provides a refrigerant recovery control device, including:
the acquisition module is used for receiving a refrigerant recovery instruction;
the recovery module is used for closing the expansion valve to recover the refrigerant after controlling the air conditioner to run for a first preset time;
and the error correction module is used for opening the expansion valve to enable the air conditioner to recover the refrigeration operation under the condition that the air conditioner is not shut down within the second preset time after the refrigerant recovery is finished.
The refrigerant recovery control device can control the air conditioner to refrigerate for a certain time and then close the expansion valve after receiving the refrigerant recovery instruction input by related operators, thereby realizing the automatic recovery of the refrigerant and having simple and convenient operation. And this refrigerant recovery controlling means can also correct the misoperation of relevant operating personnel effectively, after the refrigerant recovery finishes a certain time, if relevant operating personnel do not close the air conditioner, explain probably because the misoperation inputs the refrigerant and retrieves the order, this refrigerant recovery controlling means can control the expansion valve and open and make the air conditioner resume refrigeration this moment to avoid the air conditioner to break down, guarantee the normal operating of air conditioner.
In a third aspect, the present invention provides an air conditioner, including a receiver, a controller and an expansion valve, where the receiver is configured to receive a refrigerant recovery instruction, the controller is in communication with the receiver and the expansion valve at the same time, and is configured to receive the refrigerant recovery instruction, control the air conditioner to perform refrigeration operation for a first preset time, close the expansion valve to recover the refrigerant, and open the expansion valve to recover the refrigeration of the air conditioner when the air conditioner is not turned off within a second preset time after the refrigerant recovery is completed.
The air conditioner can close the expansion valve after cooling operation for a certain time after receiving a refrigerant recovery instruction input by a related operator, thereby realizing automatic recovery of the refrigerant and being simple and convenient to operate. And this air conditioner can also effectively correct relevant operating personnel's maloperation, and after the refrigerant recovery accomplished a certain time, if relevant operating personnel did not close the air conditioner, explain probably because misoperation and input refrigerant recovery instruction, this air conditioner can control the expansion valve and open in order to resume refrigeration this moment to avoid self to break down, guarantee self normal operating.
In a fourth aspect, the present invention provides a computer readable storage medium, having a computer readable program stored thereon, where the computer readable program is executed by a processor to implement the aforementioned refrigerant recycling control method.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to a first embodiment of the present invention;
fig. 2 is a first flowchart of a refrigerant recovery control method according to a second embodiment of the present invention;
fig. 3 is a second flowchart of a refrigerant recovery control method according to a second embodiment of the present invention;
fig. 4 is a block diagram of a refrigerant recovery control device according to a third embodiment of the present invention.
Description of reference numerals:
100-air conditioning; 110-a receiver; 120-a controller; 130-an expansion valve; 140-a temperature sensor; 200-refrigerant recovery control device; 210-an obtaining module; 220-a recovery module; 230-error correction module.
Detailed Description
An Air Conditioner (Air Conditioner) is a device that manually adjusts and controls parameters such as temperature, humidity, and flow rate of ambient Air in a building or structure.
When the air conditioner is used, the disassembly and assembly machine is needed when the air conditioner is moved. Before the machine is disassembled, the refrigerant needs to be recycled. However, the conventional refrigerant recovery method needs two manual operations (closing the liquid outlet pipe for the first time and closing the air return pipe for the second time), so that the operation is complicated and inconvenient. Meanwhile, as the air conditioner may be installed at a high altitude, after the liquid outlet pipe is manually closed by related operators, the operators need to wait for a period of time at the high altitude, and certain dangers exist.
In view of the above situation, embodiments of the present invention provide an air conditioner and a corresponding refrigerant recovery control method and apparatus, which can control the air conditioner to refrigerate for a certain time and then close an expansion valve after receiving a refrigerant recovery instruction input by a relevant operator, thereby implementing automatic recovery of the refrigerant.
And the refrigerant recovery control method can also effectively correct misoperation of related operators, and after the refrigerant recovery is finished for a certain time, if the related operators do not close the air conditioner, the description shows that the refrigerant recovery instruction is possibly input due to misoperation, and at the moment, the refrigerant recovery control method can control the expansion valve to open to enable the air conditioner to recover refrigeration, so that the air conditioner is prevented from being out of order, and the normal operation of the air conditioner is ensured.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment:
referring to fig. 1, an embodiment of the invention provides an air conditioner 100, which includes a receiver 110, a controller 120, and an expansion valve 130. The receiver 110 is configured to receive a refrigerant recovery command, and the controller 120 is in communication with the receiver 110 and the expansion valve 130, and is configured to receive the refrigerant recovery command, control the air conditioner 100 to perform a cooling operation for a first preset time, close the expansion valve 130 to recover the refrigerant, and open the expansion valve 130 to recover the cooling of the air conditioner 100 when the air conditioner 100 is not turned off within a second preset time after the refrigerant recovery is completed.
In this embodiment, the receiver 110 may be a human-computer interaction panel (which may be used for a cabinet air conditioner), and a physical key or a virtual key is provided on the receiver 110, and a related operator may input a refrigerant recovery instruction by pressing the key, and the human-computer interaction panel receives the refrigerant recovery instruction and then sends the refrigerant recovery instruction to the controller 120, so that the controller 120 controls the air conditioner 100 to perform the refrigerant recovery operation.
Certainly, in other embodiments, the receiver 110 may also be a wireless receiving module (which may be used for a cabinet air conditioner and a wall air conditioner) communicating with a remote controller, and a related operator may input a refrigerant recovery instruction through the remote controller and send the refrigerant recovery instruction to the receiver 110, and the wireless receiving module receives the refrigerant recovery instruction and sends the refrigerant recovery instruction to the controller 120, so that the controller 120 controls the air conditioner 100 to perform a refrigerant recovery operation.
The controller 120 includes a memory, a communication interface, a processor, and a bus, the memory, the communication interface, and the processor are connected by the bus, the processor is used to execute an executable module stored in the memory, such as a computer program, the code of the computer program may be in a source code form, an object code form, an executable file or some intermediate form, and the like. The communication interface is used to enable communication with the receiver 110 and the expansion valve 130. The bus may be an ISA bus, PCI bus, EISA bus, or the like.
The Memory may comprise a high-speed Random Access Memory (RAM) and may also include non-volatile storage (non-V1, e.g., at least one disk Memory). The memory is used for storing a program, such as a refrigerant recovery control device shown in fig. 4.
The controller 120 includes at least one software function module that can be stored in a memory in the form of software or firmware. After receiving the execution command, the processor executes a program to implement the refrigerant recovery control method shown in fig. 2 or 3, for example.
Further, the air conditioner 100 provided by the embodiment of the present invention further includes a temperature sensor 140 for detecting an outlet air temperature of the air conditioner 100, and the temperature sensor 140 is electrically connected to the controller 120 to send an electrical signal for representing the outlet air temperature of the air conditioner 100 to the controller 120.
The temperature sensor 140 may be of different types and disposed at different positions as required, and in this embodiment, the temperature sensor 140 is a patch sensor and is disposed on a link of a wind sweeping blade of an indoor unit of the air conditioner 100. Temperature sensor 140 adopts SMD sensor, can effectively easy to assemble and dismantle, and sets up temperature sensor 140 on the connecting rod of sweeping the wind blade, because the motion of connecting rod can not influence temperature sensor 140's use on the one hand, guarantees temperature sensor 140's normal work, and on the other hand also because the air-out temperature that detects on the connecting rod is the most accurate relatively, can guarantee this air conditioner 100's normal steady operation. Of course, in other embodiments, the temperature sensor 140 may also be a common sensor, or may be disposed on the sidewall of the air outlet.
The working principle and process of the present air conditioner 100 are specifically as follows:
when the refrigerant recovery operation is not needed, the air conditioner can normally operate;
when the refrigerant recovery operation is required, a related operator sends a refrigerant recovery command to the receiver 110 (i.e., a human-computer interaction panel or a remote controller), the receiver 110 receives the refrigerant recovery command and then transfers the refrigerant recovery command to the controller 120, and the controller 120 receives the refrigerant recovery command and then controls the air conditioner 100 to operate in the cooling mode for a first preset time and then close the expansion valve 130, at this time, the refrigerant starts to be recovered. After the refrigerant recovery is completed, the relevant operator can power off the air conditioner 100. If the air conditioner 100 is not turned off after the refrigerant recovery is completed for the second preset time, the controller 120 controls the expansion valve 130 to open, and the air conditioner 100 resumes normal operation.
The air conditioner 100 can close the expansion valve 130 after receiving the refrigerant recovery instruction input by the relevant operator and performing refrigeration operation for a certain time, thereby realizing automatic recovery of the refrigerant and being simple and convenient to operate. Moreover, the air conditioner 100 can also effectively correct the misoperation of the related operators, and after the refrigerant recovery is finished for a certain time, if the related operators do not close the air conditioner 100, it is shown that the refrigerant recovery instruction is possibly input due to misoperation, and at this time, the air conditioner 100 can control the expansion valve 130 to be opened to recover the refrigeration, thereby avoiding the self failure and ensuring the normal operation of the self.
Second embodiment:
referring to fig. 2, an embodiment of the invention provides a refrigerant recovery control method, which can be used to control the air conditioner 100 of the first embodiment to perform a refrigerant recovery operation.
The refrigerant recovery control method comprises the following steps:
step S100, receiving a refrigerant recovery command.
After the refrigerant recovery command is inputted to the receiver 110 by the relevant operator, specifically, the relevant operator may input the refrigerant through the keys on the man-machine interaction panel of the air conditioner 100 in a short distance or through the keys on the remote controller in a long distance. After receiving the refrigerant recovery command, the receiver 110 sends the refrigerant recovery command to the controller 120 of the air conditioner 100, and the controller 120 controls the air conditioner 100 to perform the refrigerant recovery operation.
In detail, after receiving the refrigerant recovery command, the controller 120 performs a step S200 of controlling the air conditioner 100 to perform a cooling operation for a first preset time and then closing the expansion valve 130 to recover the refrigerant.
The cooling operation of the air conditioner 100 may be performed by automatic cooling or forced cooling according to the ambient indoor temperature. Controlling the air conditioner 100 to automatically perform cooling operation when the indoor ambient temperature is greater than or equal to a first preset temperature; and controlling the air conditioner 100 to forcibly perform cooling operation in case that the indoor ambient temperature is less than the first preset temperature.
The first preset temperature is 14-17 ℃, in this embodiment, the first preset temperature is 16 ℃, that is, when the indoor environment temperature is greater than or equal to 16 ℃, the air conditioner 100 can automatically cool, and when the indoor environment temperature is less than 16 ℃, the air conditioner 100 cannot automatically cool and needs to perform forced cooling. In other embodiments, the first predetermined temperature may be 14 ℃, 14.5 ℃, 15 ℃, 15.5 ℃, 16.5 ℃ or 17 ℃.
The first preset time is set to ensure that the compressor can be started and frequency-up normally, so that the air conditioner 100 can reach a normal operation state. The first preset time may generally be 5min to 15min according to factors such as the type of the air conditioner 100, the ambient temperature, and the like. In this embodiment, the first preset time is 5 min. In other embodiments, the first preset time may also be 6min, 7min, 8min, 9min, 10min, 11min, 12min, 13min, 14min or 15 min.
After the step of controlling the air conditioner 100 to perform the cooling operation for the first preset time, before the step of closing the expansion valve 130, the method further includes obtaining a first outlet air temperature of the air conditioner 100 (i.e., the outlet air temperature of the air conditioner 100 before the expansion valve 130 is closed, and the outlet air temperature is detected by the temperature sensor 140 and then sent to the controller 120) to be used as one of the parameters for determining whether the subsequent air conditioner 100 determines that the refrigerant recovery is completed.
Referring to fig. 3, after the expansion valve 130 is closed to start recovering the refrigerant, the air conditioner 100 starts to perform step S210 and step S220.
Step S210 is performed first: the second outlet air temperature of the air conditioner 100 (i.e., the outlet air temperature of the air conditioner 100 after closing the expansion valve 130, which is also detected by the temperature sensor 140 and sent to the controller 120) and the operation time of the air conditioner 100 after closing the expansion valve 130 are continuously obtained.
Then, step S220 is performed: and under the condition that the absolute value of the difference value between the second outlet air temperature and the first outlet air temperature is greater than the second preset temperature and the fourth preset time is maintained, or under the condition that the running time of the air conditioner 100 after the expansion valve 130 is closed is greater than or equal to the third preset time, judging that the refrigerant recovery of the air conditioner 100 is finished and sending a prompt message.
Wherein the second preset temperature is 3-5 ℃, the third preset time is 3-5 min, and the fourth preset time is 1-3 min. In this embodiment, the second preset temperature is 3 ℃, the third preset time is 3min, and the fourth preset time is 2 min. In other embodiments, the second predetermined temperature may be 4 ℃ or 5 ℃. The third preset time may also be 4min or 5min, and the fourth preset time may also be 1min or 3 min.
After the expansion valve 130 is closed, the outlet air temperature of the air conditioner 100 will rise, so the control method sets the temperature condition, and can effectively judge whether the refrigerant recovery is finished by judging whether the absolute value of the difference between the outlet air temperatures before and after the air conditioner 100 closes the expansion valve 130 exceeds the second preset temperature.
However, in some special cases (for example, a failure of the temperature sensor 140, an excessively low indoor ambient temperature, etc.), even if the refrigerant is completely recovered, the absolute value of the difference between the outlet air temperatures before and after the expansion valve 130 is closed cannot exceed the second preset temperature, so the control method further sets a time condition, and when the operation time of the air conditioner 100 after the expansion valve 130 is closed exceeds the third preset time, the completion of the refrigerant recovery can be directly determined even if the temperature condition is not satisfied.
When the refrigerant recovery is judged to be completed, prompt information is sent out to prompt relevant operators to perform corresponding operations, such as power-off disassembly and the like.
In detail, there are many ways to send out the prompt message, and in this embodiment, the step of sending out the prompt message specifically includes: the method comprises the steps of controlling a display panel of the air conditioner 100 to display prompt symbols (such as character strings ' SS ', ' | and the like), and simultaneously controlling a buzzer to continuously sound, namely, simultaneously carrying out visual and audible prompts on related operators to ensure the prompt effect on the related operators, wherein after seeing the prompt symbols displayed on the display panel and hearing an alarm sound sent by the buzzer, the related operators can clearly know that the refrigerant recovery operation is finished, and can carry out the next operation.
Of course, in other embodiments, the step of sending the prompt message may also only include: controlling the display panel of the air conditioner 100 to display a cue symbol, i.e., a purely visual cue, or may also include controlling a buzzer to continuously sound, i.e., a purely audible cue.
After the refrigerant recovery is completed, step S300 is executed to open the expansion valve 130 to recover the cooling operation of the air conditioner 100 when the air conditioner 100 is not turned off within the second preset time after the refrigerant recovery is completed.
Wherein the second preset time is 2min-4 min. In this embodiment, the second predetermined time is 3 min. In other embodiments, the second predetermined time is 2min or 4 min.
After the refrigerant recovery operation is completed, the relevant operator turns off the air conditioner 100 within the second preset time (i.e., the air conditioner 100 is not turned off), which indicates that the air conditioner 100 does not have the refrigerant recovery requirement, and the refrigerant recovery instruction is triggered by the relevant operator by mistake. At the moment, the expansion valve is controlled to be opened to enable the air conditioner to recover refrigeration, so that the air conditioner can be prevented from being in failure, and the normal operation of the air conditioner is ensured.
Under the condition that the air conditioner is not shut down within the second preset time after the refrigerant recovery is finished, the air conditioner control method also comprises the steps of closing the display panel of the air conditioner 100 and controlling the buzzer to sound intermittently (generally 3-5 sounds) while controlling the expansion valve to be opened so as to enable the air conditioner to be refrigerated, so that related operators are reminded that the air conditioner 100 is not shut down for a long time, and the air conditioner 100 is to be normally operated.
It should be noted that, in this embodiment, the reason why the display panel is turned off and the buzzer is controlled to sound intermittently is that the step of "sending the prompt message" in this embodiment includes controlling the display panel of the air conditioner 100 to display the prompt symbol and controlling the buzzer to sound continuously. In other embodiments, turning off the display panel and controlling the buzzer to sound intermittently may be performed alternatively. For example, when the step of "sending the prompt message" includes controlling the display panel of the air conditioner 100 to display the prompt symbol, the step of turning off the display panel of the air conditioner 100 may further include turning off the display panel of the air conditioner 100 when the air conditioner 100 is not turned off within the second preset time after the refrigerant recovery is completed. For another example, when the step of "sending the prompt message" includes controlling the buzzer of the air conditioner 100 to continuously sound, the step of controlling the buzzer to sound intermittently when the air conditioner 100 is not turned off within the second preset time after the refrigerant recovery is completed.
The air conditioner is not turned off within the second preset time after the refrigerant recovery is completed, which may be that the related operator issues the refrigerant recovery command due to an operation error, and there is no demand for refrigerant recovery actually. However, it is also possible that the relevant operator is affected by some unexpected circumstances and does not perform the shutdown operation on the air conditioner in time.
Therefore, in order to avoid this, the refrigerant recovery control method of the present embodiment also increases the number of times of refrigerant recovery as one of the factors of control.
In detail, after the step of opening the expansion valve 130 to restore the cooling operation of the air conditioner 100, the number of times of performing the step of "controlling the cooling operation of the air conditioner 100 for the first preset time and then closing the expansion valve 130 to recover the refrigerant" (i.e., step S200) is determined, and if the step is performed only once, the steps S200, S210, and S220 are directly repeated.
Then, if the air conditioner 100 is turned off within the second preset time, the relevant operator may detach the air conditioner again. If the air conditioner 100 is not turned off within the second preset time, after performing step S300, performing step S400: it is determined whether the above steps (i.e., step S200, step S210, and step S220) are repeatedly performed a predetermined number of times.
If not, the steps S200, S210 and S220 are repeated again until the preset number of times is repeated.
If so (i.e., after the preset number of times is repeatedly executed, the air conditioner 100 is still not turned off within the second preset time after the refrigerant recovery is completed), step S500 is executed: the air conditioner 100 is controlled to stop the refrigerant recovery.
Under normal conditions, if the relevant operator inputs the refrigerant recovery instruction due to an operation error, after the operation of automatically recovering the refrigerant is repeatedly performed for the preset number of times (1 to 3 times), the relevant operator turns off the air conditioner 100 within the second preset time after the refrigerant recovery is completed, so as to perform subsequent operations such as dismantling and the like. If the air conditioner 100 is not turned off by the relevant operator within the second preset time after the refrigerant recovery is completed after the operation of automatically recovering the refrigerant is repeatedly executed for the preset times, it is indicated that the refrigerant recovery instruction is basically false-triggered by the relevant operator, and at this time, the air conditioner 100 is restored to normal operation, and the operation of refrigerant recovery is not performed any more.
The refrigerant recovery control method can control the air conditioner 100 to refrigerate for a certain time and then close the expansion valve 130 after receiving the refrigerant recovery instruction input by the relevant operator, thereby realizing the automatic recovery of the refrigerant and having simple and convenient operation. Moreover, the refrigerant recovery control method can also effectively correct misoperation of related operators, and after the refrigerant recovery is finished for a certain time, if the related operators do not close the air conditioner 100, it is shown that the operation error may cause the input of a refrigerant recovery instruction, at this time, the refrigerant recovery control method can control the expansion valve 130 to open to enable the air conditioner 100 to recover refrigeration, thereby avoiding the air conditioner 100 from failure and ensuring the normal operation of the air conditioner 100.
The third embodiment:
referring to fig. 4, an embodiment of the invention provides a refrigerant recovery control device 200, which can be used in the controller 120 of the air conditioner 100 of the first embodiment to control the air conditioner 100 of the first embodiment to perform a refrigerant recovery operation.
In detail, the refrigerant recovery control device 200 includes an acquisition module 210, a recovery module 220, and an error correction module 230.
The obtaining module 210 is configured to receive a refrigerant recovery instruction. In this embodiment, the obtaining module 210 is configured to execute step S100.
The recovery module 220 is configured to close the expansion valve 130 to recover the refrigerant after controlling the air conditioner 100 to perform the cooling operation for a first preset time. In this embodiment, the recycling module 220 is used to execute the step S200.
The error correction module 230 is configured to open the expansion valve 130 to recover the cooling operation of the air conditioner 100 when the air conditioner 100 is not turned off within a second preset time after the refrigerant recovery is completed. In this embodiment, the error correction module 230 is configured to execute step S300.
The refrigerant recovery control device 200 can control the air conditioner 100 to refrigerate for a certain time and then close the expansion valve 130 after receiving the refrigerant recovery instruction input by the relevant operator, thereby realizing the automatic recovery of the refrigerant and having simple and convenient operation. Moreover, the refrigerant recovery control device can also effectively correct misoperation of related operators, and after the refrigerant recovery is finished for a certain time, if the related operators do not close the air conditioner 100, the description shows that the refrigerant recovery instruction is possibly input due to misoperation, at the moment, the refrigerant recovery control device can control the expansion valve 130 to be opened to enable the air conditioner 100 to recover refrigeration, so that the air conditioner 100 is prevented from being out of order, and the normal operation of the air conditioner 100 is ensured.
The fourth embodiment:
an embodiment of the present invention provides a computer-readable storage medium, which stores a computer-readable program (i.e., the refrigerant recovery control device 200 in the third embodiment), and when the computer-readable program is executed by a processor, the method for controlling refrigerant recovery in the second embodiment is implemented.
Note that the computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (9)

1. A refrigerant recovery control method is characterized by comprising the following steps:
receiving a refrigerant recovery instruction;
controlling the air conditioner to perform refrigeration operation for a first preset time and then closing the expansion valve to recover the refrigerant;
opening an expansion valve to enable the air conditioner to recover refrigeration operation under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is finished;
after the step of opening the expansion valve to restore the cooling operation of the air conditioner, the method further comprises the following steps:
repeatedly executing the step of closing the expansion valve to recover the refrigerant after controlling the air conditioner to refrigerate and run for the first preset time;
and after the preset times of repeated execution, controlling the air conditioner to stop the refrigerant recovery under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is finished.
2. The refrigerant recovery control method according to claim 1, wherein the first predetermined time is 5min to 15min, and the second predetermined time is 2min to 4 min.
3. The refrigerant recovery control method according to claim 1, wherein the step of controlling the cooling operation of the air conditioner includes:
controlling the air conditioner to automatically refrigerate and run under the condition that the indoor environment temperature is greater than or equal to a first preset temperature;
and controlling the forced cooling operation of the air conditioner under the condition that the indoor environment temperature is lower than the first preset temperature.
4. The refrigerant recovery control method according to claim 1, further comprising, after the step of controlling the air-conditioning cooling operation for a first preset time and before the step of closing the expansion valve: acquiring a first outlet air temperature of an air conditioner;
after the step of closing the expansion valve, the method further comprises the following steps:
continuously acquiring a second air outlet temperature of the air conditioner and the running time of the air conditioner after the expansion valve is closed;
and under the condition that the absolute value of the difference value between the second air outlet temperature and the first air outlet temperature is greater than a second preset temperature and a fourth preset time is maintained, or under the condition that the running time of the air conditioner after the expansion valve is closed is greater than or equal to a third preset time, judging that the refrigerant recovery of the air conditioner is finished and sending prompt information.
5. The refrigerant recovery control method according to claim 4, wherein the second preset temperature is 3 ℃ to 5 ℃, the third preset time is 3min to 5min, and the fourth preset time is 1min to 3 min.
6. The refrigerant recovery control method according to claim 4, wherein the step of sending out the prompt message includes:
controlling a display panel of the air conditioner to display a prompt symbol;
or controlling a buzzer of the air conditioner to sound continuously;
or, the display panel of the air conditioner is controlled to display a prompt symbol, and the buzzer is controlled to sound continuously.
7. The refrigerant recovery control method according to claim 6, wherein when the step of "sending out a prompt message" includes controlling a display panel of an air conditioner to display a prompt symbol, the method further includes, when the air conditioner is not turned off within a second preset time after the refrigerant recovery is completed:
turning off a display panel of the air conditioner;
when the step of "sending out the prompt information" includes that the buzzer of the air conditioner is controlled to sound continuously, the method further comprises the following steps that in a second preset time after the completion of the refrigerant recovery, the air conditioner is not shut down:
controlling the buzzer to sound intermittently;
when the step of "sending out the prompting message" includes that the display panel of control air conditioner shows the notice symbol, when control bee calling organ lasts the sound production, in the second time of predetermineeing after the refrigerant is retrieved the air conditioner does not have the circumstances of shutting down, still include:
and closing a display panel of the air conditioner and controlling a buzzer to sound intermittently.
8. A refrigerant recovery control device, comprising:
the acquisition module is used for receiving a refrigerant recovery instruction;
the recovery module is used for closing the expansion valve to recover the refrigerant after controlling the air conditioner to run for a first preset time; the error correction module is used for opening the expansion valve to enable the air conditioner to recover the refrigeration operation under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is finished; and a step for repeatedly executing the step of controlling the air conditioner to perform refrigeration operation for a first preset time and then closing the expansion valve to recover the refrigerant after opening the expansion valve to recover the refrigeration operation of the air conditioner; and after the preset times of repeated execution, controlling the air conditioner to stop the refrigerant recovery under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is finished.
9. An air conditioner is characterized by comprising a receiver, a controller and an expansion valve, wherein the receiver is used for receiving a refrigerant recovery instruction, the controller is simultaneously communicated with the receiver and the expansion valve and is configured to receive the refrigerant recovery instruction, control the air conditioner to perform refrigeration operation for a first preset time, close the expansion valve to recover the refrigerant, and open the expansion valve to enable the air conditioner to recover the refrigeration under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is completed; after the expansion valve is opened to enable the air conditioner to recover the refrigeration operation, the step of controlling the refrigeration operation of the air conditioner to be closed after the first preset time so as to recover the refrigerant is repeatedly executed; and after the preset times of repeated execution, controlling the air conditioner to stop the refrigerant recovery under the condition that the air conditioner is not shut down within a second preset time after the refrigerant recovery is finished.
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JPH10246540A (en) * 1997-03-05 1998-09-14 Funai Electric Co Ltd Operation controller for air conditioner
CN109357369B (en) * 2018-09-10 2020-06-02 珠海格力电器股份有限公司 Air conditioner and refrigerant recovery control method thereof
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