CN115200102A - Refrigerant recovery control system and control method of air conditioner - Google Patents

Refrigerant recovery control system and control method of air conditioner Download PDF

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Publication number
CN115200102A
CN115200102A CN202210854431.9A CN202210854431A CN115200102A CN 115200102 A CN115200102 A CN 115200102A CN 202210854431 A CN202210854431 A CN 202210854431A CN 115200102 A CN115200102 A CN 115200102A
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China
Prior art keywords
refrigerant
unit
pipeline
recovery
air conditioner
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Pending
Application number
CN202210854431.9A
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Chinese (zh)
Inventor
唐高锋
张�杰
潘洋洋
曹奔
徐建林
许恋斯
余春虎
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Jiangnan Shipyard Group Co Ltd
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Jiangnan Shipyard Group Co Ltd
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Publication date
Application filed by Jiangnan Shipyard Group Co Ltd filed Critical Jiangnan Shipyard Group Co Ltd
Priority to CN202210854431.9A priority Critical patent/CN115200102A/en
Publication of CN115200102A publication Critical patent/CN115200102A/en
Pending legal-status Critical Current

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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; Cooling
    • 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
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • F24F11/62—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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks

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

Abstract

The application discloses refrigerant recovery control system and method of air conditioner, and the control system comprises an air conditioner and a control module, wherein the air conditioner comprises an indoor unit and an outdoor unit, and the control module comprises a sensing unit, a recovery unit and a control unit. Whether the refrigerant leaks into the indoor unit or not is monitored by the sensing unit arranged on the indoor unit, a leakage signal is sent to the control unit when the refrigerant leakage is monitored, the control unit receives the leakage signal, then the outdoor unit is controlled to stop flowing liquid refrigerant into the indoor unit, and the recovery unit is controlled to recover and store the refrigerant in a pipeline for communicating the outdoor unit with the indoor unit, so that potential safety hazards caused by refrigerant diffusion are effectively avoided, the use safety of the air conditioner is improved, and the subsequent maintenance cost of the air conditioner is reduced.

Description

Refrigerant recovery control system and control method of air conditioner
Technical Field
The application relates to the technical field of refrigeration of marine air conditioners, in particular to a refrigerant recovery control system and a refrigerant recovery control method of an air conditioner.
Background
The air conditioner on the ship is generally divided into an air conditioner external unit and an air conditioner internal unit as a common temperature regulator. In the cooling mode, the refrigerant absorbs heat at the evaporator of the indoor unit and releases heat at the outdoor unit, thereby taking out heat from the indoor unit to the outdoor unit.
The ship pipeline is complicated, and the air-conditioning pipeline is in a cold-heat exchange environment for a long time in the refrigeration process, so that dew condensation or frost formation can be generated, corrosion and cracking can be caused at the pipeline or a joint, and the problem of leakage of an air-conditioning refrigerant can be caused. The existing ship body has no definite measures on air conditioner refrigerant leakage early warning and recovery, the leaked refrigerant can cause harm to human bodies and the environment, for example, freon can inhibit the breathing function when the human bodies are in the environment of the Freon for a long time, and causes coma and even death, and the Freon enters the atmospheric environment, can destroy ozone in the atmosphere and decompose the ozone, so that ultraviolet radiation harm is caused.
Therefore, it is an urgent need in the art to provide a refrigerant recovery control system and method for an air conditioner, which can automatically monitor whether there is leakage of refrigerant in the air conditioner and automatically recover refrigerant in a pipeline when the refrigerant leaks, thereby improving the safety of the air conditioner.
Disclosure of Invention
The purpose of the application is to provide a refrigerant recovery control system and a control method of an air conditioner, which can automatically monitor whether the refrigerant in the air conditioner leaks or not, automatically recover the refrigerant in a pipeline when the refrigerant leaks, improve the use safety of the air conditioner, and reduce the maintenance cost of the air conditioner.
In a first aspect, an embodiment of the present application provides a refrigerant recovery control system for an air conditioner, which includes an air conditioner and a control module.
The air conditioner comprises an indoor unit and an outdoor unit, wherein the outdoor unit converts liquid refrigerant into gaseous refrigerant through a first pipeline, returns to the outdoor unit through a second pipeline, and converts the gaseous refrigerant into liquid refrigerant again inside the outdoor unit.
The control module comprises a sensing unit, a recovery unit and a control unit, wherein the sensing unit is arranged in the indoor unit and is used for monitoring whether the refrigerant leaks into the indoor unit or not; the recovery unit is arranged in the outdoor unit and is used for recovering the refrigerants remained in the first pipeline and the second pipeline; the control unit is in communication connection with the sensing unit and the recovery unit.
The control module is configured to: when the sensing unit monitors that the refrigerant leaks, the sensing unit sends a leakage signal to the control unit, and when the control unit receives the leakage signal, the outdoor unit is controlled to stop flowing liquid refrigerant into the first pipeline, and the recovery unit is controlled to recover and store the refrigerant in the first pipeline and the refrigerant in the second pipeline.
In one possible embodiment, the outdoor unit includes a compressor, a condenser and a dry filter connected in sequence by pipes, and a recovery unit and a first valve are disposed between the pipes of the condenser and the dry filter.
In one possible embodiment, the recovery unit comprises a recovery bottle for recovering and storing the refrigerant leaked in the first pipeline and the second pipeline, the recovery bottle comprises an inlet end and an outlet end, the inlet end is communicated to a pipeline between the first valve and the condenser through an inlet pipeline, and the inlet pipeline is provided with a second valve; the outlet end is communicated to a pipeline between the first valve and the drying filter through an outlet pipeline, and the outlet pipeline is provided with a third valve.
In one possible embodiment, the recovery unit further comprises an electronic scale disposed below the recovery bottle for monitoring the weight of the refrigerant recovered and stored in the recovery bottle.
In one possible embodiment, the sensing unit comprises a concentration sensor and an audible and visual alarm which are in communication connection, the concentration sensor is used for monitoring the concentration of the indoor refrigerant and sending a leakage signal when the concentration exceeds a preset safety threshold, and the audible and visual alarm sends out an audible and visual alarm when receiving the leakage signal.
In one possible embodiment, a pressure sensor is disposed on the first pipeline, and the pressure sensor is configured to monitor a pressure value in the first pipeline, generate a leakage signal when the pressure value in the first pipeline is lower than a preset pressure, and send the leakage signal to the control unit.
In one possible embodiment, the number of the sensing units is multiple, and the sensing units are arranged in a plurality of indoor units of the air conditioner in a one-to-one correspondence manner.
In a second aspect, the present application further provides a refrigerant recovery control method for an air conditioner, which is applicable to the recovery control system, and includes the following steps:
the sensing unit monitors whether the refrigerant leaks or not and sends out a leakage signal and a sound-light alarm when the refrigerant leaks;
after receiving the leakage signal, the control unit controls to close the first valve and open the second valve;
the control unit controls the compressor and adjusts the compressor to the maximum power, drives the refrigerant in the second pipeline to accelerate the backflow to the indoor unit, and the refrigerant is liquefied after being compressed and condensed by the compressor and the condenser and enters the recovery bottle for storage.
In one possible embodiment, the control unit receives the leakage signal further comprising:
and monitoring the pressure in the first pipeline by using the pressure sensor, and generating a leakage signal when the pressure value in the first pipeline is lower than the preset pressure.
In one possible embodiment, the step control unit controls the compressor and adjusts the compressor to a maximum power to drive the refrigerant in the second pipeline to flow back to the indoor unit at an accelerated speed, and further includes:
opening the third valve;
the gaseous refrigerant in the recovery bottle is driven to enter the first pipeline through the outlet pipeline and the drying filter, mixed with the residual refrigerant in the first pipeline, and then flows back to the outdoor unit through the second pipeline to be compressed and condensed to be liquid and then enters the recovery bottle again.
Compared with the prior art, the application has at least the following beneficial effects:
the control system comprises the air conditioner and a control module, wherein the air conditioner comprises an indoor unit and an outdoor unit, and the control module comprises a sensing unit, a recovery unit and a control unit. Whether the refrigerant leaks into the indoor unit or not is monitored by the sensing unit arranged on the indoor unit, a leakage signal is sent to the control unit when the refrigerant leakage is monitored, the control unit receives the leakage signal, then the outdoor unit is controlled to stop flowing liquid refrigerant into the indoor unit, and the recovery unit is controlled to recover and store the refrigerant in a pipeline for communicating the outdoor unit with the indoor unit, so that potential safety hazards caused by refrigerant diffusion are effectively avoided, the use safety of the air conditioner is improved, and the subsequent maintenance cost of the air conditioner is reduced.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram illustrating a refrigerant recovery control system of an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating an internal structure of an outdoor unit of a refrigerant recovery control system of an air conditioner according to an embodiment of the present application.
Illustration of the drawings:
10 indoor units; 100 an evaporator; 20 outdoor units; 200 compressor; 210 a condenser; 220 drying the filter; 230 a first valve; 30 a first conduit; 40 a second conduit; 50 a sensing unit; 60 a recovery unit; 600, recovering the bottle; 610 an inlet line; 611 a second valve; 620 an outlet line; 621 a third valve; 630 electronic scales; 70 pressure sensor.
Detailed Description
The following detailed description of embodiments of the present application will be provided in conjunction with the accompanying drawings, which are included to illustrate and not to limit the present application.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Moreover, the terms "first," "second," and the like are used solely to distinguish one from another without necessarily indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
According to an aspect of the present application, there is provided a refrigerant recovery control system of an air conditioner, referring to fig. 1 and 2, including an air conditioner and a control module.
The air conditioner includes an indoor unit 10 and an outdoor unit 20, wherein the outdoor unit 20 converts a liquid refrigerant into a gas refrigerant in the indoor unit 10 by flowing the liquid refrigerant into the indoor unit 10 through a first pipe 30, returns the gas refrigerant to the outdoor unit 20 through a second pipe 40, and converts the gas refrigerant into a liquid refrigerant again in the outdoor unit 20.
The control module comprises a sensing unit 50, a recycling unit 60 and a control unit, wherein the sensing unit 50 is arranged in the indoor unit 10 and used for monitoring whether the refrigerant leaks into the indoor space, the recycling unit 60 is arranged in the outdoor unit 20 and used for recycling the refrigerant remained in the first pipeline 30 and the second pipeline 40, and the control unit is in communication connection with the sensing unit 50 and the recycling unit 60.
When the sensing unit 50 monitors that the refrigerant leaks, it sends a leakage signal to the control unit, and after the control unit receives the leakage signal, it controls the outdoor unit 20 to stop flowing the liquid refrigerant into the first pipe 30, and controls the recovery unit 60 to recover and store the refrigerant in the first pipe 30 and the second pipe 40.
In one embodiment, the outdoor unit 20 includes a compressor 200, a condenser 210, and a dry filter 220 connected in series by pipes, and a recovery unit 60 and a first valve 230 are disposed between the pipes of the condenser 210 and the dry filter 220. In a normal working state of the refrigerant, the gaseous refrigerant is first compressed by the compressor 200 and condensed by the condenser 210 to become a liquid refrigerant, then the residual moisture and impurities in the liquid refrigerant are filtered by the first valve 230 and the dry filter 220, and then the liquid refrigerant is sent to the indoor unit 10 through the first pipeline 30, and is evaporated and absorbed by the evaporator 100 of the indoor unit 10 to become a gaseous refrigerant, and finally the gaseous refrigerant returns to the compressor 200 again through the second pipeline 40 to be compressed, so that the refrigerant cycle is realized.
In this embodiment, the sensing unit 50 sends a leakage signal to the control unit when monitoring that the refrigerant leaks, and the control unit controls the first valve 230 after receiving the leakage signal, so as to close the pipeline between the condenser 210 and the filter-drier 220, so that the liquid refrigerant does not flow into the first pipeline 30 through the first valve 230 and the filter-drier 220, but flows into the recovery unit 60 for recovery and storage, thereby avoiding further leakage of the refrigerant and causing unnecessary accidents and losses.
In one embodiment, the recovery unit 60 includes a recovery bottle 600 for recovering and storing the refrigerant leaked in the first and second pipes 30 and 40, the recovery bottle 600 includes an inlet end connected to a line between the first valve 230 and the condenser 210 through an inlet line 610, the inlet line 610 is provided with a second valve 611, and an outlet end connected to a line between the first valve 230 and the dry filter 220 through an outlet line 620, the outlet line 620 is provided with a third valve 621. The liquid refrigerant is introduced into the recovery bottle 600 through the inlet port, and the gaseous refrigerant inside the recovery bottle 600 is discharged to the recovery bottle 600 through the outlet port.
In this embodiment, the control unit receives the leakage signal and controls the first valve 230, and at the same time, controls to open the second valve 611 and the third valve 621, so that the refrigerant is liquefied by the condenser 210 and then directly enters the recovery bottle 600 through the second valve 611 to be stored, and the compressor 200 provides a driving force for recovering the gaseous refrigerant entering the second pipeline 40. Preferably, the control unit controls the compressor 200 to operate at maximum power after receiving the leakage signal.
With the continuous operation of the compressor 200, a liquid refrigerant continuously enters the recovery bottle 600, which causes the pressure in the recovery bottle 600 to gradually increase, the control unit controls to open the third valve 621, so that the gaseous refrigerant in the recovery bottle 600 can be mixed with the residual refrigerant in the first pipeline after passing through the outlet end, the third valve 621 and the filter-drier 220 in sequence, and then the gaseous refrigerant after passing through the evaporator 100 flows back to the compressor 200 and the condenser 210 to be further compressed and condensed.
The continuous operation of the compressor 200 can suck out the gaseous refrigerant in the recovery bottle 600, so that the pressure in the recovery bottle 600 is reduced, a pressure difference is formed between the first pipeline 30 and the second pipeline 40 and the refrigerant recovery bottle 600, and the residual refrigerant in the first pipeline 30 and the second pipeline 40 continuously flows into the recovery bottle 600 under the condition of the pressure difference, thereby realizing the controlled recovery of the refrigerant.
Further, the recovery unit 60 further includes an electronic scale 630, and the electronic scale 630 is disposed below the recovery tank 600 and measures the weight of the refrigerant recovered and stored in the recovery tank 600 to calculate the leakage amount of the refrigerant.
In one embodiment, sensing unit 50 includes communication connection's concentration sensor and audible and visual annunciator, and concentration sensor is used for monitoring the concentration of indoor refrigerant to send when concentration surpasses and predetermine safety threshold and reveal the signal, audible and visual annunciator sends audible and visual alarm when receiving and reveal the signal, withdraws fast in order to remind indoor personnel, avoids causing personnel's injury.
In one embodiment, a pressure sensor 70 is provided on the first conduit 30 for monitoring the pressure within the first conduit 30. When the pressure sensor 70 detects that the pressure value in the first pipe 30 is lower than the preset pressure, it generates a leakage signal and transmits the leakage signal to the control unit, and after the control unit receives the leakage signal, the control unit controls the outdoor unit 20 to stop flowing the liquid refrigerant into the first pipe 30, and controls the recovery unit 60 to recover and store the refrigerant in the first pipe 30 and the second pipe 40.
In one embodiment, the sensing units 50 are provided in a plurality, and are disposed in a one-to-one correspondence with the indoor units 10 of the air conditioner. In this embodiment, one outdoor unit 20 is connected to two indoor units 10, and each indoor unit 10 is provided with a sensing unit 50 in communication connection with a control unit.
In another aspect, the present application further provides a refrigerant recovery control method for an air conditioner, including the recovery control system, further including the steps of:
the sensing unit 50 monitors whether the refrigerant leaks, and sends out a leakage signal and a sound-light alarm when the refrigerant leaks;
after receiving the leakage signal, the control unit controls to close the first valve 230 and open the second valve 611;
the control unit controls the compressor 200 and adjusts the compressor to the maximum power, drives the refrigerant in the second pipeline 40 to flow back to the indoor unit 10, and the refrigerant is compressed and condensed by the compressor 200 and the condenser 210, and then is liquefied and stored in the recovery bottle 600.
Through the steps, the sensing unit 50 can timely give a warning to the leakage of the refrigerant when the refrigerant leaks in the operation process of the air conditioner, and meanwhile, the control unit starts the recovery process of the refrigerant.
The first valve 230 is controlled to be closed, that is, the pipeline between the condenser 210 and the dry filter 220 is closed, so that the liquid refrigerant does not flow into the first pipeline 30 through the first valve 230 and the dry filter 220, but enters the recovery unit 60 for recovery and storage, and further leakage of the refrigerant is avoided. The second valve 611 is controlled to open, so that the refrigerant is liquefied by the condenser 210 and directly enters the recovery bottle 600 through the second valve 611 to be stored. The compressor 200 is used as the driving force for recovering the refrigerant, and after the control unit receives the leakage signal, the compressor 200 is controlled to operate at the maximum power, so that the recovery of the refrigerant can be realized in the fastest time, and the further leakage of the refrigerant is avoided, and unnecessary accidents and losses are avoided.
In one embodiment, the control unit receives the leakage signal further including monitoring the pressure in the first conduit 30 using the pressure sensor 70, and generating the leakage signal when the pressure in the first conduit 30 is lower than a predetermined pressure. The leakage signal generated by the pressure sensor 70 is the same as the leakage signal generated by the sensing unit 50, that is, the control unit, after receiving the leakage signal generated by the pressure sensor 70, will recover the refrigerant in the air conditioner by the same recovery step as the step of receiving the leakage signal generated by the sensing unit 50.
In an embodiment, the step control unit controls the compressor 200 and adjusts the compressor to a maximum power, drives the refrigerant in the first pipe 30 and the second pipe 40 to flow back to the indoor unit 10 at an increased speed, and further opens the third valve 621, drives the gaseous refrigerant in the recovery bottle 600 to enter the first pipe 30 through the outlet pipe 620 and the dry filter 220, and mix with the residual refrigerant in the first pipe, so that the pressure in the recovery bottle 600 is released, a pressure difference is formed between the first pipe 30, the second pipe 40 and the refrigerant recovery bottle 600, the gaseous refrigerant in the original recovery bottle 600 and the residual refrigerant in the first pipe 30 and the second pipe 40 continuously flow into the outdoor unit 20 under the pressure difference, and then the gaseous refrigerant is compressed and condensed to a liquid state to enter the recovery bottle 600, thereby achieving the controlled recovery of the refrigerant.
The present application provides a refrigerant recovery control system and a control method for an air conditioner, the control system includes an air conditioner including an indoor unit 10 and an outdoor unit 20, and a control module including a sensing unit 50, a recovery unit 60, and a control unit. Whether the refrigerant leaks into the room or not is monitored by using the sensing unit 50 arranged on the indoor unit 10, when the leakage of the refrigerant is monitored, a leakage signal is sent to the control unit, after the control unit receives the leakage signal, the outdoor unit 20 is controlled to stop flowing the liquid refrigerant into the indoor unit 10, and the recovery unit 60 is controlled to recover and store the refrigerant in a pipeline for communicating the outdoor unit 20 with the indoor unit 10, so that the potential safety hazard caused by refrigerant diffusion is effectively avoided, the use safety of the air conditioner is improved, and the subsequent maintenance cost of the air conditioner is reduced.
The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present application, and these modifications and substitutions should also be regarded as the protection scope of the present application.

Claims (10)

1. A refrigerant recovery control system of an air conditioner, comprising:
the air conditioner comprises an indoor unit and an outdoor unit, wherein the outdoor unit converts liquid refrigerant into gaseous refrigerant through a first pipeline, returns to the outdoor unit through a second pipeline, and converts the gaseous refrigerant into liquid refrigerant again inside the outdoor unit;
the control module comprises a sensing unit, a recovery unit and a control unit, wherein the sensing unit is arranged in the indoor unit and used for monitoring whether the refrigerant leaks into the indoor unit; the recovery unit is arranged in the outdoor unit and is used for recovering the refrigerant remained in the first pipeline and the second pipeline; the control unit is in communication connection with the sensing unit and the recovery unit;
the control module is configured to: when the sensing unit monitors that the refrigerant leaks, a leakage signal is sent to the control unit, and when the control unit receives the leakage signal, the outdoor unit is controlled to stop flowing liquid refrigerant into the first pipeline, and the recovery unit is controlled to recover and store the refrigerant in the first pipeline and the refrigerant in the second pipeline.
2. The recycling control system of claim 1, wherein the outdoor unit comprises a compressor, a condenser and a dry filter connected in sequence by pipes, and the recycling unit and the first valve are disposed between the pipes of the condenser and the dry filter.
3. The recovery control system according to claim 2, wherein the recovery unit includes a recovery bottle for recovering and storing the refrigerant leaked in the first and second pipes, the recovery bottle including an inlet end and an outlet end, the inlet end being connected to a pipe between the first valve and the condenser through an inlet pipe, the inlet pipe being provided with a second valve; the outlet end is communicated to a pipeline between the first valve and the drying filter through an outlet pipeline, and the outlet pipeline is provided with a third valve.
4. The recycling control system according to claim 3, wherein the recycling unit further comprises an electronic scale disposed below the recycling bottle for monitoring a weight of the refrigerant recycled and stored in the recycling bottle.
5. The recycling control system according to claim 1, wherein the sensing unit comprises a concentration sensor and an audible and visual alarm, the concentration sensor is in communication connection with the audible and visual alarm, the concentration sensor is used for monitoring the concentration of the indoor refrigerant and sending the leakage signal when the concentration exceeds a preset safety threshold, and the audible and visual alarm gives an audible and visual alarm when receiving the leakage signal.
6. The recycling control system according to claim 1, wherein a pressure sensor is disposed on the first pipeline, and the pressure sensor is configured to monitor a pressure value in the first pipeline, generate a leakage signal when the pressure value in the first pipeline is lower than a preset pressure, and send the leakage signal to the control unit.
7. The recycling control system according to claim 1, wherein the number of the sensing units is plural, and the sensing units are disposed in one-to-one correspondence with the indoor units of the air conditioner.
8. A refrigerant recovery control method of an air conditioner adapted to the recovery control system according to any one of claims 1 to 7, comprising the steps of:
the sensing unit monitors whether the refrigerant leaks or not and sends out a leakage signal and a sound-light alarm when the refrigerant leaks;
after receiving the leakage signal, the control unit controls to close the first valve and open the second valve;
the control unit controls the compressor and adjusts the compressor to the maximum power, drives the refrigerant in the second pipeline to accelerate the backflow to the indoor unit, and the refrigerant is compressed and condensed by the compressor and the condenser and then liquefied to enter the recovery bottle for storage.
9. The recycling control method of claim 8, wherein the receiving of the leakage signal by the control unit further comprises:
and monitoring the pressure in the first pipeline by using the pressure sensor, and generating a leakage signal when the pressure value in the first pipeline is lower than the preset pressure.
10. The recovery control method according to any one of claims 8 to 9, wherein the control unit controls the compressor and adjusts to a maximum power to drive the refrigerant in the second pipe to flow back to the indoor unit at an increased speed, and further comprising:
opening the third valve;
the gaseous refrigerant in the recovery bottle is driven to enter the first pipeline through the outlet pipeline and the drying filter, mixed with the residual refrigerant in the first pipeline, and then flows back to the outdoor unit through the second pipeline, is compressed and condensed to be liquid and then enters the recovery bottle again.
CN202210854431.9A 2022-07-15 2022-07-15 Refrigerant recovery control system and control method of air conditioner Pending CN115200102A (en)

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KR20050118826A (en) * 2004-06-15 2005-12-20 주식회사 대우일렉트로닉스 Air conditioner, and method of withdrawing refrigerant automatically
CN101643109A (en) * 2008-08-07 2010-02-10 江南造船(集团)有限责任公司 Method for centering centerline of subsection hull constructed in two-island mode
CN110469951A (en) * 2019-08-19 2019-11-19 青岛海尔空调器有限总公司 A kind of control method of air conditioner, storage medium and air conditioner
WO2020194527A1 (en) * 2019-03-26 2020-10-01 三菱電機株式会社 Outdoor unit and indoor unit of refrigeration cycle device
US20220049883A1 (en) * 2020-08-13 2022-02-17 Emerson Climate Technologies, Inc. Refrigerant charging systems and methods

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050118826A (en) * 2004-06-15 2005-12-20 주식회사 대우일렉트로닉스 Air conditioner, and method of withdrawing refrigerant automatically
CN101643109A (en) * 2008-08-07 2010-02-10 江南造船(集团)有限责任公司 Method for centering centerline of subsection hull constructed in two-island mode
WO2020194527A1 (en) * 2019-03-26 2020-10-01 三菱電機株式会社 Outdoor unit and indoor unit of refrigeration cycle device
CN110469951A (en) * 2019-08-19 2019-11-19 青岛海尔空调器有限总公司 A kind of control method of air conditioner, storage medium and air conditioner
US20220049883A1 (en) * 2020-08-13 2022-02-17 Emerson Climate Technologies, Inc. Refrigerant charging systems and methods

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