CN111609532A - Refrigerant recovery method and device - Google Patents
Refrigerant recovery method and device Download PDFInfo
- Publication number
- CN111609532A CN111609532A CN202010426705.5A CN202010426705A CN111609532A CN 111609532 A CN111609532 A CN 111609532A CN 202010426705 A CN202010426705 A CN 202010426705A CN 111609532 A CN111609532 A CN 111609532A
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- compressor
- refrigerant recovery
- indoor unit
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
-
- 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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
Landscapes
- 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)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention provides a refrigerant recovery method and device, relates to the technical field of air conditioners, and can completely recover refrigerants. The method comprises the following steps: when a refrigerant recovery instruction is received, the first connecting valve is controlled to be closed, and the compressor is controlled to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigeration mode; if the pressure value of the first pipeline is smaller than the set value, the second connecting valve is controlled to be closed, and the compressor is controlled to stop running; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve. The invention is used for recovering the refrigerant.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant recovery method and a refrigerant recovery device.
Background
The air conditioner frequently has the condition that the air conditioner needs to be moved in the use process, and the current air conditioner does not have a special flow for recycling the refrigerant when moving the air conditioner. Whether the refrigerant is completely recovered or not in the machine moving process is mostly judged depending on the experience of machine moving personnel. When the refrigerant is completely recovered according to the experience of the machine moving personnel, the refrigerant is not completely recovered due to insufficient experience of the machine moving personnel, so that the refrigerant leaks into the air in the machine moving process, the human health is harmed, and the environment pollution is caused.
Disclosure of Invention
The embodiment of the invention provides a refrigerant recovery method and a refrigerant recovery device, which are used for recovering refrigerants so as to completely recover the refrigerants.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a refrigerant recovery method is provided, including: when a refrigerant recovery instruction is received, the first connecting valve is controlled to be closed, and the compressor is controlled to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigeration mode; if the pressure value of the first pipeline is smaller than the set value, the second connecting valve is controlled to be closed, and the compressor is controlled to stop running; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve.
In a second aspect, a refrigerant recovery device is provided, including: when the receiving module receives a refrigerant recovery instruction, the control module controls the first connecting valve to be closed and controls the compressor to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigeration mode; the control module is also used for controlling the second connecting valve to be closed and controlling the compressor to stop running when the pressure value of the first pipeline is smaller than a set value; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve.
In a third aspect, a control device is provided, which includes the refrigerant recovery device according to the second aspect.
In a fourth aspect, a thermostat is provided comprising a control device as provided in the third aspect.
The refrigerant recovery method provided by the embodiment of the invention comprises the following steps: when a refrigerant recovery instruction is received, the first connecting valve is controlled to be closed, and the compressor is controlled to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigeration mode; if the pressure value of the first pipeline is smaller than the set value, the second connecting valve is controlled to be closed, and the compressor is controlled to stop running; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve. In the refrigerant recovery method provided by the embodiment of the invention, when the refrigerant is recovered, the compressor is controlled to operate in a refrigeration mode, so that the refrigerant is collected from the indoor unit to the outdoor unit along a refrigeration cycle path by the indoor unit, and the first connecting valve is closed, so that the refrigerant is prevented from being recovered to the outdoor unit and then moving to the indoor unit; after the refrigerant of the indoor unit is completely recycled to the outdoor unit through pressure detection, the second connecting valve is closed, the refrigerant is prevented from being leaked by the second connecting valve again in the outdoor unit moving process, and the refrigerant can be completely recycled.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a first schematic flow chart of a refrigerant recovery method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a refrigerant recovery device according to an embodiment of the present invention;
fig. 4 is a second schematic flow chart illustrating a refrigerant recovery method according to an embodiment of the present invention;
fig. 5 is a third schematic flow chart illustrating a refrigerant recovery method according to an embodiment of the present invention;
fig. 6 is a fourth schematic flow chart illustrating a refrigerant recovery method according to an embodiment of the present invention;
fig. 7 is a first schematic structural diagram of a refrigerant recovery device according to an embodiment of the present invention;
fig. 8 is a second schematic structural diagram of a refrigerant recovery device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another refrigerant recovery device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used for distinguishing the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like are not limited in number or execution order.
The existing air conditioner generally comprises an indoor unit and an outdoor unit, and when the air conditioner needs to be moved, the refrigerant in the air conditioner is usually recovered to the outdoor unit for storage. However, in the conventional refrigerant recovery, a machine-moving person generally determines whether the refrigerant recovery is complete according to experience, and a standard refrigerant recovery process is not formed. Therefore, during the refrigerant recovery process, the refrigerant recovery may be incomplete or the outdoor unit may run for a long time to damage the air conditioner pipeline.
To solve the problem, an embodiment of the present invention provides a refrigerant recovery method, which is applied to the air conditioner shown in fig. 1 and includes an outdoor unit 01 and an indoor unit 02.
The outdoor unit 01 comprises a compressor 1, a high-pressure switch 2, an exhaust temperature sensor 3, an air suction temperature sensor 4, a four-way valve 5, a condenser 6, an electronic expansion valve 7, a low-pressure stop valve 8, a high-pressure stop valve 9 and a pressure sensor 10; the outdoor unit 02 includes an evaporator 11 and a fan 12.
The compressor 1 is used for compressing a refrigerant and driving the refrigerant to flow; the high-pressure switch 2 is used for closing when the pressure in the pipeline of the outdoor unit is overhigh and controlling the air conditioner to stop; the exhaust temperature sensor 3 is used for starting a system protection mechanism of the air conditioner when the temperature of an exhaust pipe of the compressor 1 is abnormal, so that the air conditioner is prevented from being damaged; the air suction temperature sensor 4 is used for starting a system protection mechanism of the air conditioner when the temperature of the air suction pipe of the compressor 1 is abnormal, so that the air conditioner is prevented from being damaged; the four-way valve 5 is used for changing the flow direction of a refrigerant in a pipeline of the air conditioner system and realizing the interconversion between a refrigeration mode and a heating mode; the condenser 6 is used for realizing heat exchange between the refrigerant and outdoor air; the electronic expansion valve 7 is used for controlling the temperature provided by the indoor unit by adjusting the flow of the refrigerant; the low-pressure stop valve 8 and the high-pressure stop valve 9 are used for controlling the connection and disconnection between the outdoor unit and the indoor unit; the pressure sensor 10 is used for detecting the pressure value of the first pipeline; the evaporator 11 is used for realizing heat exchange between a refrigerant and indoor air; the fan 12 serves to accelerate heat exchange of indoor air with the evaporator 11.
It should be noted that the four-way valve 5 includes a first port, a second port, a third port and a fourth port, the first port may be a D port of the four-way valve 5 in fig. 1, the second port may be an E port of the four-way valve 5 in fig. 1, the third port may be an S port of the four-way valve 5 in fig. 1, and the fourth port may be a C port of the four-way valve 5 in fig. 1. The structure of the air conditioner shown in fig. 1 is merely an example, and in practice, the air conditioner may further include other components, and the above description is only made for a simple description of each component of the air conditioner, and in practice, each component of the air conditioner may further include other functions, which does not limit the embodiment of the present invention.
The method for recovering refrigerant according to the embodiment of the present invention is specifically described below, and the method is applied to an air conditioner, where the air conditioner includes an outdoor unit and an indoor unit, and the outdoor unit includes a compressor, a four-way valve, a first connection valve, and a second connection valve. As shown in fig. 2, the method includes:
and S101, when a refrigerant recovery instruction is received, controlling the first connecting valve to be closed, and controlling the compressor to operate in a refrigeration mode.
The first connecting valve is used for controlling connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigerating mode. Here, the fact that the first connection valve controls the disconnection between the indoor unit and the fourth port of the four-way valve means that the first connection valve is closed so that the refrigerant cannot flow from the outdoor unit pipe line to the indoor unit in the cooling mode.
Specifically, the receiving of the refrigerant recovery command may be implemented by a separate refrigerant recovery device, or may be implemented by a control motherboard of the outdoor unit. The refrigerant recovery device may include a Micro Control Unit (MCU) for receiving a signal command sent by a refrigerant recovery switch, a sensor, and other components, and controlling components such as a four-way valve control, an electronic expansion valve, a first connection valve, and a second connection valve, and the structure of the refrigerant recovery device may be as shown in fig. 3. The refrigerant recovery device can be used for controlling the operation of components of the outdoor unit, such as controlling the conduction of a four-way valve, controlling the operation of a compressor, controlling the closing of a first connecting valve and a second connecting valve, controlling the opening degree of an electronic expansion valve, controlling the display of a nixie tube and the like; the refrigerant recovery device may also be used to detect the operation states of components of the outdoor unit, such as the detection states of various sensors of the outdoor unit and the on-off state of the refrigerant recovery switch.
When the air conditioner needs to be moved, a person moving the air conditioner can manually close the refrigerant recovery switch, and the refrigerant recovery switch sends an electric signal to the refrigerant recovery device after being closed. The refrigerant recovery device determines the refrigerant recovery mode of the air conditioner to be started according to the electric signal sent when the refrigerant recovery switch is closed, and controls the operation of other components. The refrigerant recovery command here refers to an electric signal transmitted to the refrigerant recovery device when the refrigerant recovery switch is closed.
And after receiving the refrigerant recovery instruction, the refrigerant recovery device controls the first connecting valve to be closed and controls the compressor to operate in a refrigeration mode. When the compressor operates in a cooling mode, the refrigerant flows along the first path, and the refrigerant is finally gathered to the condenser and the second pipeline of the outdoor unit because the first connecting valve is closed. The first path is a circulation path of the refrigerant when the outdoor unit operates in the cooling mode, and the second line is a line between the first connection valve and the condenser. The first connecting valve may be a low pressure cut-off valve as shown in fig. 1, and the fourth port may be a C port of the four-way valve 5 in fig. 1.
Optionally, the refrigerant recovery switch may be a dial switch or a key switch. When the refrigerant recovery switch is a dial switch, the dial switch comprises an "ON" gear and an "OFF" gear, so that when the dial switch is set to be switched to the "ON" gear, the outdoor unit starts a refrigerant recovery mode, and at the moment, a refrigerant recovery instruction is an electric signal sent when the dial switch is switched to the "ON" gear. When the refrigerant recovery switch is a key switch, the key switch comprises a pressing state and a popping state, so that when the key switch is in the pressing state, the outdoor unit starts a refrigerant recovery mode, and the refrigerant recovery instruction is an electric signal sent when the key switch is pressed. Of course, the dial switch and the key switch are only exemplary, and in practice, the refrigerant recovery switch may also be other mechanical switches or automatic switches, and those skilled in the art may adjust the refrigerant recovery switch according to the needs, and the embodiment of the present invention is not limited thereto.
Optionally, the refrigerant recovery device may further include a nixie tube, and the refrigerant recovery device may control display of the nixie tube so that the shift personnel can know the refrigerant recovery process. The nixie tube can be used for indicating the refrigerant recovery state, and can display a first state code if the refrigerant recovery mode comprises entering the refrigerant recovery state; and when the first connecting valve needs to be closed during refrigerant recovery, the second state code can be displayed. If the refrigerant recovery device receives the refrigerant recovery instruction, the nixie tube is controlled to display the Fb, and the air conditioner can be known to start the refrigerant recovery mode by the air conditioner moving personnel according to the Fb displayed by the nixie tube. The display state of the nixie tube also comprises a LOFF, after the air conditioner starts a refrigerant recovery mode, the display state of the nixie tube is changed into the LOFF, and at the moment, the refrigerant recovery device controls the first connecting valve to be closed. Here, "Fb" is the first state code, and "LOFF" is the second state code.
In an alternative implementation, the first connecting valve can be closed manually by the transfer personnel. Because the personnel of moving the quick-witted can confirm the process that the refrigerant was retrieved according to the display state of charactron, consequently when the charactron shows "LOFF", the personnel of moving the machine can manually close first connecting valve.
It should be noted that, in the embodiment of the present invention, since the refrigerant recovery mode is actually a mode in which the air conditioner is in an abnormal operation, the priority of the refrigerant recovery mode is lower than that of other normal modes, such as the cooling mode and the heating mode. In order to prevent the air conditioner from being in a standby state, when the refrigerant recovery switch is closed, the air conditioner continues to operate in a normal mode, and therefore the air conditioner needs to be in a power-off state before the refrigerant recovery switch is closed. After the refrigerant recovery switch is closed, the air conditioner is powered on, so that the air conditioner can enter a refrigerant recovery mode.
The refrigerant recovery method provided by the embodiment of the invention is carried out when the outdoor unit is in the refrigeration mode, so that when the compressor runs in the refrigeration mode, the four-way valve also needs to work under the conduction condition in the refrigeration mode, namely a D port of the four-way valve is conducted with a C port, and an E port is conducted with an S port. Meanwhile, in order to enable the air conditioner to work quickly after the air conditioner is moved, the electronic expansion valve of the outdoor unit may be in an open state, and the opening degree of the electronic expansion valve may be the opening degree before the air conditioner is powered off, for example, the total opening degree of the electronic expansion valve is 100 steps, and the opening degree of the electronic expansion valve may be 50 steps or 60 steps when the refrigerant is recovered, which is not limited in the embodiment of the present invention. Of course, if the electronic expansion valve is in the closed state, the recovery of the refrigerant in this embodiment is not affected.
And S102, if the pressure value of the first pipeline is smaller than the set value, controlling the second connecting valve to be closed, and controlling the compressor to stop running.
The first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve.
Specifically, when the compressor operates in the cooling mode, the refrigerant in the air conditioner is gradually collected to the second pipeline, the pressure detected by the pressure sensor in the first pipeline is gradually reduced, and when the pressure value detected by the pressure sensor is smaller than a set value, the completion of refrigerant recovery can be determined. At this time, the second connection valve may be closed to prevent the refrigerant from leaking from the second connection valve when the outdoor unit moves. After the second connecting valve is closed, the compressor can be controlled to stop running, and the outdoor unit pipeline is prevented from being burst due to continuous running of the compressor when the first connecting valve and the second connecting valve are closed simultaneously. The second connecting valve may be a high-pressure cut-off valve as shown in fig. 1, and the second port is an E port of the four-way valve 5 in fig. 1.
Optionally, when the refrigerant recovery is completed, the nixie tube may display the third status code; when the second connecting valve needs to be closed after the refrigerant is recovered, the fourth state code can be displayed; after the second connecting valve is closed, the nixie tube can display a fifth state code and indicate to disconnect the refrigerant recovery switch. If the pressure value of the first pipeline is smaller than the set value after the refrigerant recovery device obtains the pressure value of the first pipeline, the nixie tube displays GOOD, and the refrigerant recovery is finished. The nixie tube can be changed to HOFF immediately after displaying GOOD, and the display interval between GOOD and HOFF can be 0.5s or 1 s. When the nixie tube displays 'HOFF', the refrigerant recovery device controls the second connecting valve to be closed; the display state of the nixie tube further includes "SOFF", and the nixie tube displays "SOFF" when the compressor stops operating. The 0.5s or 1s is only exemplary, and one skilled in the art can set the values according to needs, and the embodiments of the present invention are not limited. Here, "GOOD" is the third status code, "HOFF" is the fourth status code, and "SOFF" is the fifth status code.
Optionally, when the nixie tube displays "SOFF", the refrigerant recovery switch is turned off while the compressor stops operating, and the air conditioner exits the refrigerant recovery mode.
It should be noted that, when the refrigerant recovery switch is a dial switch, turning the dial switch to an "OFF" gear is to turn OFF the refrigerant recovery switch; when the refrigerant recovery switch is a key switch, the key switch is in a popup state, namely the refrigerant recovery switch is switched off. Because the dial switch and the key switch are both closed and opened by manual operation of a mobile phone operator, after the nixie tube displays the SOFF, if the refrigerant recovery switch (the dial switch or the key switch) is not opened within a preset time, the refrigerant recovery device can force the air conditioner to exit the refrigerant recovery mode. After the air conditioner exits the refrigerant recovery mode, the air conditioner moving personnel need to disconnect the refrigerant recovery switch, and the air conditioner is prevented from being damaged due to the fact that the air conditioner enters the refrigerant recovery mode again after the air conditioner is powered on and started after the air conditioner is moved. The predetermined time may be 120s or 180s, and the like, and the embodiment of the present invention is not limited thereto. Of course, when the refrigerant recovery switch is another automatic switch, if the nixie tube displays "SOFF", the refrigerant recovery device can control the refrigerant recovery switch to be automatically switched off, and manual operation of a machine moving person is not needed.
In an alternative implementation, the second connecting valve can be closed manually by the transfer personnel. When the display state of the nixie tube is changed from GOOD to HOFF, the personnel moving the aircraft can determine that the refrigerant is completely recovered, and the personnel moving the aircraft can manually close the second connecting valve.
The set value may be a pressure value of the first pipe when the compressor operates in the cooling mode when no refrigerant exists in the outdoor unit. The set value may be different for different models of air conditioners, and those skilled in the art may obtain the set value through experiments, which is not limited in the embodiment of the present invention. The pressure value of the first pipeline can be detected and obtained through a pressure sensor.
Alternatively, as shown in fig. 4, after the refrigerant recovery device receives the refrigerant recovery command, the step S101 may be divided into the step S101A and the step S101B:
and S101A, receiving a refrigerant recovery command.
And S101, 101B, controlling the first connecting valve to be closed, and controlling the compressor to operate in a cooling mode.
After step S101A, the refrigerant recovery method further includes:
and S201, sending an air supply instruction to the indoor unit.
The air supply instruction is used for indicating the indoor unit to operate in an air supply mode.
Specifically, since the refrigerant flows through the pipes between the outdoor unit and the indoor unit, the refrigerant may flow through the pipes of the outdoor unit and the pipes of the indoor unit. In order to accelerate the refrigerant in the pipeline of the indoor unit to flow to the pipeline of the outdoor unit, when the outdoor unit recovers the refrigerant, the refrigerant recovery device can send an air supply instruction to the indoor unit, so that the indoor unit starts an air supply mode.
When the indoor unit starts the air supply mode, only the fan of the indoor unit works. When the fan of the indoor unit works, the temperature of the evaporator in the indoor unit is reduced, and the pressure value of the evaporator is smaller than that of the first pipeline. Therefore, the refrigerant in the indoor unit can move to the first pipeline more quickly, and the refrigerant recovery efficiency is improved.
Optionally, when the air supply mode of the indoor unit is started, the nixie tube may display a sixth status code for instructing the indoor unit to start the air supply mode; and after the air supply mode of the indoor unit fails to be started, the nixie tube can display a seventh status code and indicate the air conditioner to quit the refrigerant recovery mode. For example, the nixie tube may be changed to "FAn" immediately after displaying "Fb '", and the display interval between "Fb'" and "FAn" may be 0.5s or 1 s. When the nixie tube displays 'FAn', the refrigerant recovery device sends an air supply instruction to the indoor unit. The 0.5s or 1s is only exemplary, and one skilled in the art can set the values according to needs, and the embodiments of the present invention are not limited. Here, "FAn" is the sixth status code.
When the digital tube displays "FAn", the refrigerant recovery device sends an air supply instruction to the indoor unit to instruct the indoor unit to operate in an air supply mode; if the indoor unit starts the air supply mode, response information is returned to the refrigerant recovery device to indicate that the indoor unit starts the air supply mode; if the refrigerant recovery device does not receive the response information within 10s or 20s, controlling the nixie tube to continuously display FAn and sending an air supply instruction to the indoor unit again; after the refrigerant recovery device continuously sends the air supply instruction for three times, if the response message is not received, the air conditioner exits the refrigerant recovery mode, and the nixie tube displays 'AGIn'. And after the refrigerant recovery device receives the response message of the indoor unit, controlling the nixie tube to display LOFF. Here, "AGIn" is the seventh status code. The 10s or 20s are only exemplary, and those skilled in the art can set the values according to the needs, and the embodiments of the present invention are not limited. The above-mentioned display of the nixie tube, such as "Fb", "FAn", "LOFF", and "HOFF", is only exemplary, and those skilled in the art may set the display status of the nixie tube to other codes, which does not limit the embodiment of the present invention.
In the embodiment of the invention, the air conditioner moving personnel can perform corresponding operation according to the display of the nixie tube, so that the damage of the air conditioner caused by misoperation of the air conditioner moving personnel can be avoided; and after the digital tube displays the SOFF preset time, the air conditioner is forced to exit the refrigerant recovery mode, so that the air conditioner can be prevented from being damaged due to misoperation.
It should be noted that, since the refrigerant recovery mode is an abnormal operation mode of the air conditioner, the air conditioner may be stopped by a protection mechanism in some normal operation modes of the air conditioner, and thus the refrigerant recovery cannot be performed. Therefore, when the air conditioner recovers the refrigerant, it is necessary to shield these protection mechanisms, such as low-pressure protection, refrigeration anti-freezing protection, refrigeration anti-overload protection, indoor and outdoor communication fault protection, and the like.
Optionally, as shown in fig. 5, the step S101B may further include:
and S101, 101B, controlling the first connecting valve to be closed, and controlling the compressor to run in a refrigeration mode for a first time period.
In particular, in practice, since the recovery of the refrigerant can be completed in a short time, the compressor can be limited to operate in the cooling mode for a first period of time, which may be 30s or 40 s. The first time period may be obtained empirically by a person skilled in the art, or may be obtained experimentally by a person skilled in the art, and the embodiment of the present invention is not limited thereto.
It should be noted that the first duration is set to facilitate the transfer personnel to know the refrigerant recovery process in time when the second connection valve is closed manually. When the compressor does not work for the first time, the transfer personnel need to detect the pressure value of the first pipeline in real time, and when the pressure value of the first pipeline is smaller than or equal to a set value, the second connecting valve is closed; when the compressor works in a first time period, the personnel moving the compressor only need to detect the pressure value of the first pipeline when the first time period is finished, and when the pressure value of the first pipeline is less than or equal to a set value, the second connecting valve is closed. The monitoring of the first time length by the mobile phone personnel can be realized through a nixie tube, for example, the running time length of the compressor can be timed through the nixie tube, if the first time length is 40s, the nixie tube can display the countdown time of 40s after the compressor starts to run in the refrigeration mode. The personnel of moving the aircraft can confirm the length of time of operation of compressor through the time that the charactron shows.
Optionally, as shown in fig. 6, step S102 may include:
and S1021, if the pressure value of the first pipeline is larger than or equal to the set value, controlling the compressor to continue to operate in the refrigeration mode for a second time.
Specifically, after the compressor operates in the refrigeration mode, if the pressure value of the first pipeline is greater than or equal to the set value, it is determined that the refrigerant is incompletely recovered, and at this time, the compressor may be controlled to continue operating in the refrigeration mode for a second period of time, so that the incompletely recovered refrigerant flows to the second pipeline. The second time period may be 5s or 10s, and may be set by one skilled in the art without limitation. However, since most of the refrigerant may be recovered during the previous operation of the compressor, the second period of time is not easily set to be too long, which results in waste of energy.
And S1022, if the pressure value of the first pipeline is still larger than or equal to the set value after the compressor operates in the refrigeration mode for the second time period, controlling the compressor to operate in the refrigeration mode for the second time period again.
Specifically, after the compressor continues to operate in the cooling mode for the second period of time, if the pressure value of the first pipeline is still greater than or equal to the set value, the compressor may be controlled to continue to operate in the cooling mode for the second period of time until the pressure value of the first pipeline is less than the set value.
And S1023, if the pressure value of the first pipeline is less than the set value after the compressor operates in the refrigeration mode for the second time, controlling the second connecting valve to be closed.
Specifically, after the pressure value of the first pipeline is smaller than the set value, it can be determined that the refrigerant is completely recovered, and at this time, the second connecting valve can be closed, so that the refrigerant is prevented from leaking from the second connecting valve after the compressor is stopped.
And S1024, controlling the compressor to stop running.
Specifically, after the refrigerant is recovered and the second connecting valve is closed, the compressor can be controlled to stop running, and the situation that the pipeline of the outdoor unit is cracked due to the fact that the compressor continues to work in a closed environment is avoided.
In this step, the compressor may stop operating after the second connection valve is closed, or may stop operating after the second connection valve is closed for a certain time. When the compressor stops operating after the second connecting valve is closed for a certain time, the refrigerant can be more concentrated to the condenser of the outdoor unit, and the refrigerant is convenient to store. The predetermined time may be 5s or 10s, and the embodiment of the present invention is not limited thereto. However, the certain time cannot be set to be too long, so that the pipeline of the outdoor unit is prevented from being cracked due to the fact that the compressor runs in a closed environment for a long time.
In the refrigerant recovery method provided by the embodiment of the invention, when the refrigerant recovery instruction is received, the first connecting valve between the outdoor unit and the indoor unit is closed, and the compressor is controlled to operate in the refrigeration mode, so that the refrigerant in the outdoor unit cannot enter the indoor unit and is stored in the pipeline of the outdoor unit. And as the amount of the refrigerant in the indoor unit is reduced, the pressure of the first pipeline is reduced, so that whether the refrigerant recovery is finished or not can be judged according to the pressure value of the first pipeline. After the refrigerant is recovered, the second connecting valve is closed, and the refrigerant leakage in the machine moving process can be avoided.
The refrigerant recovery method provided by the embodiment of the invention comprises the following steps: when a refrigerant recovery instruction is received, the first connecting valve is controlled to be closed, and the compressor is controlled to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigeration mode; if the pressure value of the first pipeline is smaller than the set value, the second connecting valve is controlled to be closed, and the compressor is controlled to stop running; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve. In the refrigerant recovery method provided by the embodiment of the invention, when the refrigerant is recovered, the compressor is controlled to operate in a refrigeration mode, so that the refrigerant is collected from the indoor unit to the outdoor unit along a refrigeration cycle path by the indoor unit, and the first connecting valve is closed, so that the refrigerant is prevented from being recovered to the outdoor unit and then moving to the indoor unit; after the refrigerant of the indoor unit is completely recycled to the outdoor unit through pressure detection, the second connecting valve is closed, the refrigerant is prevented from being leaked by the second connecting valve again in the outdoor unit moving process, and the refrigerant can be completely recycled.
As shown in fig. 7, an embodiment of the present invention further provides a refrigerant recovery device 30, which is applied to an air conditioner, where the air conditioner includes an outdoor unit, and the outdoor unit includes a compressor, a low-pressure stop valve, and a high-pressure stop valve. The refrigerant recovery device 30 includes a receiving module 301 and a control module 302.
When the receiving module 301 receives a refrigerant recovery instruction, the control module 302 controls the first connection valve to be closed and controls the compressor to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigerating mode.
The control module 302 is further configured to control the second connection valve to close and control the compressor to stop operating when the pressure value of the first pipeline is smaller than a set value; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve.
Optionally, as shown in fig. 8, the refrigerant recovery device 30 further includes a sending module 303.
A sending module 303, configured to send an air supply instruction to an indoor unit; the air supply instruction is used for instructing the indoor unit to operate in an air supply mode.
Optionally, the control module 302 is specifically configured to control the compressor to operate in the cooling mode for a first duration.
Optionally, the control module 302 is further specifically configured to control the compressor to continue to operate in the cooling mode for a second duration when the pressure value of the first pipeline is greater than or equal to the set value; if the pressure value of the first pipeline is still larger than or equal to the set value after the compressor operates in the refrigeration mode for the second time period, controlling the compressor to operate in the refrigeration mode for the second time period again; and if the pressure value of the first pipeline is less than the set value after the compressor operates in the refrigeration mode for the second time again, controlling the second connecting valve to close.
The refrigerant recovery device provided by the embodiment of the invention comprises: when the receiving module receives a refrigerant recovery instruction, the control module controls the first connecting valve to be closed and controls the compressor to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and the fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigeration mode; the control module is also used for controlling the second connecting valve to be closed and controlling the compressor to stop running when the pressure value of the first pipeline is smaller than a set value; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving a refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve. In the refrigerant recovery method provided by the embodiment of the invention, when the refrigerant is recovered, the compressor is controlled to operate in a refrigeration mode, so that the refrigerant is collected from the indoor unit to the outdoor unit along a refrigeration cycle path by the indoor unit, and the first connecting valve is closed, so that the refrigerant is prevented from being recovered to the outdoor unit and then moving to the indoor unit; after the refrigerant of the indoor unit is completely recycled to the outdoor unit through pressure detection, the second connecting valve is closed, the refrigerant is prevented from being leaked by the second connecting valve again in the outdoor unit moving process, and the refrigerant can be completely recycled.
The embodiment of the invention also provides a control device which comprises the refrigerant recovery device.
The embodiment of the invention also provides a temperature adjusting device which comprises the control device.
Alternatively, the temperature adjusting device may be an air conditioner.
As shown in fig. 9, another refrigerant recycling device according to an embodiment of the present invention includes a memory 41, a processor 42, a bus 43, and a communication interface 44; the memory 41 is used for storing computer execution instructions, and the processor 42 is connected with the memory 41 through a bus 43; when the refrigerant recovery device operates, the processor 42 executes the computer-executable instructions stored in the memory 41 to make the refrigerant recovery device execute the refrigerant recovery method according to the above embodiment.
In particular implementations, processor 42(42-1 and 42-2) may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 9, for example, as one embodiment. And as an example, the refrigerant recovery device may include a plurality of processors 42, such as the processor 42-1 and the processor 42-2 shown in fig. 9. Each of the processors 42 may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). Processor 42 may refer herein to one or more devices, circuits, and/or processing cores that process data (e.g., computer program instructions).
The memory 41 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 41 may be self-contained and coupled to the processor 42 via a bus 43. The memory 41 may also be integrated with the processor 42.
In a specific implementation, the memory 41 is used for storing data in the present application and computer-executable instructions corresponding to software programs for executing the present application. The processor 42 may operate or execute the software program stored in the memory 41 and call the data stored in the memory 41, thereby performing various functions of the refrigerant recovery apparatus.
The communication interface 44 is any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and the like. The communication interface 44 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.
The bus 43 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus 43 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a computer execution instruction, and when the computer execution instruction runs on a computer, the computer is enabled to execute the refrigerant recovery method provided in the foregoing embodiment.
The embodiment of the present invention further provides a computer program, where the computer program may be directly loaded into a memory and includes a software code, and the computer program is loaded and executed by a computer to implement the refrigerant recovery method provided in the above embodiment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A refrigerant recovery method is applied to an air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, and the outdoor unit comprises a compressor, a four-way valve, a first connecting valve and a second connecting valve; it is characterized by comprising:
when a refrigerant recovery instruction is received, controlling the first connecting valve to be closed, and controlling the compressor to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and a fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigerating mode;
if the pressure value of the first pipeline is smaller than a set value, the second connecting valve is controlled to be closed, and the compressor is controlled to stop running; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving the refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve.
2. The refrigerant recovery method according to claim 1, further comprising, before the controlling of the first connection valve to be closed:
sending an air supply instruction to the indoor unit; and the air supply instruction is used for indicating the indoor unit to operate in an air supply mode.
3. The refrigerant recovery method according to claim 1 or 2, wherein the controlling the compressor to operate in the cooling mode specifically includes:
the compressor is controlled to operate in a cooling mode for a first duration.
4. The refrigerant recovery method according to claim 3, wherein the controlling the second connection valve to close if the pressure value of the first pipeline is less than the set value comprises:
if the pressure value of the first pipeline is greater than or equal to the set value, controlling the compressor to continue to operate in the refrigeration mode for a second time period;
if the pressure value of the first pipeline is still larger than or equal to the set value after the compressor operates in the refrigeration mode for the second time period, controlling the compressor to operate in the refrigeration mode for the second time period again;
and if the pressure value of the first pipeline is smaller than the set value after the compressor operates in the refrigeration mode for the second time again, controlling the second connecting valve to be closed.
5. A refrigerant recovery device is applied to an air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, and the outdoor unit comprises a compressor, a four-way valve, a first connecting valve and a second connecting valve; the device is characterized by comprising a receiving module and a control module:
when the receiving module receives a refrigerant recovery instruction, the control module controls the first connecting valve to be closed and controls the compressor to operate in a refrigeration mode; the first connecting valve is used for controlling the connection and disconnection between the indoor unit and a fourth port of the four-way valve, and the fourth port is used for transmitting a refrigerant to the indoor unit in a refrigerating mode;
the control module is further used for controlling the second connecting valve to be closed and controlling the compressor to stop running when the pressure value of the first pipeline is smaller than a set value; the first pipeline is a pipeline between a second port of the four-way valve and the second connecting valve, and the second port is used for receiving the refrigerant from the indoor unit in a refrigeration mode; and the second connecting valve is used for controlling the connection and disconnection between the indoor unit and the second port of the four-way valve.
6. The refrigerant recovery device according to claim 5, further comprising a sending module:
the sending module is used for sending an air supply instruction to the indoor unit; and the air supply instruction is used for indicating the indoor unit to operate in an air supply mode.
7. The refrigerant recovery device according to claim 5 or 6, wherein the control module is specifically configured to: the compressor is controlled to operate in a cooling mode for a first duration.
8. The refrigerant recovery device according to claim 7, wherein the control module is further configured to control the compressor to continue to operate in the cooling mode for a second duration when the pressure value of the first pipeline is greater than or equal to the set value;
if the pressure value of the first pipeline is still larger than or equal to the set value after the compressor operates in the refrigeration mode for the second time period, controlling the compressor to operate in the refrigeration mode for the second time period again;
and if the pressure value of the first pipeline is smaller than the set value after the compressor operates in the refrigeration mode for the second time again, controlling the second connecting valve to be closed.
9. A control device, characterized by comprising the refrigerant recovery device according to any one of claims 5 to 8.
10. A thermostat, characterized by comprising a control device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426705.5A CN111609532A (en) | 2020-05-19 | 2020-05-19 | Refrigerant recovery method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426705.5A CN111609532A (en) | 2020-05-19 | 2020-05-19 | Refrigerant recovery method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111609532A true CN111609532A (en) | 2020-09-01 |
Family
ID=72202115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010426705.5A Pending CN111609532A (en) | 2020-05-19 | 2020-05-19 | Refrigerant recovery method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111609532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440392A (en) * | 2022-02-25 | 2022-05-06 | 海信（山东）空调有限公司 | Air conditioner and air conditioner control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011196630A (en) * | 2010-03-19 | 2011-10-06 | Fujitsu General Ltd | Multi-room type air conditioning device |
| CN104019525A (en) * | 2014-06-24 | 2014-09-03 | 广东美的暖通设备有限公司 | Recycling method and recycling system for air conditioner coolant |
| CN104457054A (en) * | 2014-11-17 | 2015-03-25 | 广东美的制冷设备有限公司 | Method and device for recovering air conditioner coolants |
| CN105180498A (en) * | 2015-09-02 | 2015-12-23 | 广东美的制冷设备有限公司 | Floor-type split air conditioner, refrigerant recovering method and device |
| CN110513821A (en) * | 2019-08-09 | 2019-11-29 | 海信（山东）空调有限公司 | A kind of air-conditioner outdoor unit detection system and its detection method |
| CN110822664A (en) * | 2019-11-27 | 2020-02-21 | 广东美的制冷设备有限公司 | Refrigerant recovery method and system of air conditioner and air conditioner |
| CN111121156A (en) * | 2020-01-20 | 2020-05-08 | 青岛海信日立空调系统有限公司 | Multi-connected air conditioner |
-
2020
- 2020-05-19 CN CN202010426705.5A patent/CN111609532A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011196630A (en) * | 2010-03-19 | 2011-10-06 | Fujitsu General Ltd | Multi-room type air conditioning device |
| CN104019525A (en) * | 2014-06-24 | 2014-09-03 | 广东美的暖通设备有限公司 | Recycling method and recycling system for air conditioner coolant |
| CN104457054A (en) * | 2014-11-17 | 2015-03-25 | 广东美的制冷设备有限公司 | Method and device for recovering air conditioner coolants |
| CN105180498A (en) * | 2015-09-02 | 2015-12-23 | 广东美的制冷设备有限公司 | Floor-type split air conditioner, refrigerant recovering method and device |
| CN110513821A (en) * | 2019-08-09 | 2019-11-29 | 海信（山东）空调有限公司 | A kind of air-conditioner outdoor unit detection system and its detection method |
| CN110822664A (en) * | 2019-11-27 | 2020-02-21 | 广东美的制冷设备有限公司 | Refrigerant recovery method and system of air conditioner and air conditioner |
| CN111121156A (en) * | 2020-01-20 | 2020-05-08 | 青岛海信日立空调系统有限公司 | Multi-connected air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440392A (en) * | 2022-02-25 | 2022-05-06 | 海信（山东）空调有限公司 | Air conditioner and air conditioner control method |
| CN114440392B (en) * | 2022-02-25 | 2023-10-27 | 海信空调有限公司 | Air conditioner and air conditioner control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2011089751A (en) | Failure diagnosing system of air conditioner | |
| CN110094859B (en) | Control method and device for automatically recycling refrigerant of air conditioner, air conditioner and computer readable storage medium | |
| CN109297136A (en) | A kind of expansion valve blocking determination method and air conditioner | |
| CN105972770A (en) | Heating control method and device for air conditioner system and air conditioner system | |
| CN109455057B (en) | Air conditioner control method and device, storage medium and air conditioner | |
| CN115264811A (en) | Air conditioner refrigerant recovery method and device, air conditioner, medium and program product | |
| CN111609532A (en) | Refrigerant recovery method and device | |
| JP2013204871A (en) | Air conditioner | |
| CN114234468B (en) | Heat pump device control method, device, unit, computer equipment and storage medium | |
| CN113551371A (en) | Method and device for detecting states of high-pressure valve and low-pressure valve of air conditioner, air conditioner and medium | |
| CN102230850B (en) | Method and system for on-line test on outer machine of wind-cooling freezer | |
| WO2022188398A1 (en) | Method and apparatus for controlling air conditioner, and air conditioner | |
| CN115289553A (en) | Multi-split air conditioning system | |
| CN114877488A (en) | Air conditioning system and filth blockage determining method thereof | |
| CN103175284B (en) | Realize communicator and the method for changes in temperature multi-gang air-conditioner generator set controller simultaneously | |
| CN114151929A (en) | Heat pump air conditioning unit, anti-freezing control method and device thereof and storage medium | |
| CN110686355B (en) | Air conditioner heating control method and device, air conditioner and computer readable storage medium | |
| CN112503713A (en) | Starting method and device of air conditioner | |
| JP2019095138A (en) | Air conditioner and refrigeration device | |
| CN114646127B (en) | Air conditioning system and refrigerant circulation abnormality detection method | |
| CN106896286A (en) | The equipment detection method and display device of a kind of home appliance | |
| CN114923273B (en) | Air conditioning system and control method thereof | |
| CN115654582A (en) | Air conditioning system and control method thereof | |
| CN114576798A (en) | Multi-split air conditioning system and control method thereof | |
| CN115289605A (en) | Multi-split air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200901 |
|
| RJ01 | Rejection of invention patent application after publication |