CN112413946A - Refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment - Google Patents
Refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment Download PDFInfo
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- CN112413946A CN112413946A CN202011323447.4A CN202011323447A CN112413946A CN 112413946 A CN112413946 A CN 112413946A CN 202011323447 A CN202011323447 A CN 202011323447A CN 112413946 A CN112413946 A CN 112413946A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
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- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2525—Pressure relief valves
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
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- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment, wherein the refrigerant recovery equipment comprises: the refrigerant recovery device comprises a first pressure release valve, a refrigerant recovery device and a second pressure release valve; the refrigerant recovery device is arranged on a refrigerant recovery branch between a condenser and an evaporator of the air conditioning system; the first pressure relief valve is arranged on a branch between the condenser and the refrigerant recovery device; and the second pressure relief valve is arranged on a branch between the refrigerant recovery device and the evaporator. According to the invention, the refrigerant recovery branch is arranged. When the detected system pressure value reaches the preset pressure value, a first pressure release valve on the refrigerant recovery branch is opened, the refrigerant is recovered, and automatic recovery of the refrigerant is realized.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment.
Background
The refrigerant is a key medium for refrigerating the air conditioner and plays a key role in refrigerating the air conditioner. There are various air conditioners on the market, and most of them use an electric compressor as a refrigerant recovery power and perform refrigerant recovery by forced suction.
However, in real life, the air conditioner compressor which cannot be fully operated or the compressor which is not supplied with power needs to be dismounted due to faults, so that the refrigerant in the air conditioning system lacks the source power for recovery. Most of air conditioners sold in the market at present are not provided with a refrigerant recovery device, refrigerant recovery is only carried out when the faults of refrigeration cycle parts are repaired, and the recovery device is large in size and high in price, so that the refrigerant is directly discharged into the atmosphere in most of the repairing processes, and environmental pollution is caused.
Therefore, how to realize automatic recycling of the refrigerant is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a refrigerant recovery control method and device, a refrigerant recovery device and an air conditioning device, so as to solve the problem that the refrigerant recovery device in the prior art is insufficient and cannot realize automatic recovery of the refrigerant.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a refrigerant recovery plant, is applied to air conditioning system, its characterized in that, refrigerant recovery plant includes: the refrigerant recovery device comprises a first pressure release valve, a refrigerant recovery device and a second pressure release valve; wherein the content of the first and second substances,
the refrigerant recovery device is arranged on a refrigerant recovery branch between a condenser and an evaporator of the air conditioning system;
the first pressure relief valve is arranged on a branch between the condenser and the refrigerant recovery device;
and the second pressure relief valve is arranged on a branch between the refrigerant recovery device and the evaporator.
Preferably, the refrigerant recovery apparatus further includes:
the pressure sensor is arranged on a pipeline at the inlet end or the outlet end of a compressor of the air conditioning system and used for detecting the system pressure value of the pipeline of the air conditioning system; the system pressure value is used for controlling the opening and closing of the first pressure relief valve and the second pressure relief valve.
In order to achieve the above object, the present invention further provides a refrigerant recovery control method applied to the above refrigerant recovery apparatus, the method including:
acquiring a system pressure value of the air conditioning system pipeline;
judging whether the system pressure value reaches a preset pressure value or not;
and if the system pressure value reaches a preset pressure value, opening the first pressure release valve to recover the refrigerant, so that the refrigerant flows into the refrigerant recovery device.
Preferably, after acquiring the system pressure value of the air conditioning system pipeline, the method further includes:
judging whether the system pressure value is smaller than a preset minimum pressure value or not;
and if the system pressure value is smaller than the preset minimum pressure value, opening the second pressure release valve, and closing the first pressure release valve to release the refrigerant, so that the refrigerant flows out of the refrigerant recovery device.
Preferably, if the system pressure value is less than the preset minimum pressure value, then open the second relief valve, close the first relief valve, release the refrigerant, after the refrigerant flows out of the refrigerant recovery unit, still include:
judging whether the system pressure value is recovered to a standard pressure value or not;
and if the system pressure value is recovered to the standard pressure value, closing the second pressure release valve and stopping releasing the refrigerant.
Preferably, the method further comprises the following steps:
judging whether the system pressure value is greater than a preset alarm pressure value or not;
and if the system pressure value is greater than the preset alarm pressure value, opening a first pressure release valve to perform pressure release treatment.
Preferably, if the system pressure value is greater than the preset alarm pressure value, then open the first pressure release valve, after the pressure release treatment, the method further includes:
judging whether the system pressure value is recovered to a standard pressure value or not;
and if the system pressure value is recovered to the standard pressure value, closing the first pressure relief valve and stopping pressure relief.
Preferably, the method further comprises the following steps: and if the system pressure value is greater than the preset alarm pressure value, triggering an alarm.
In order to achieve the above object, the present invention further provides a refrigerant recovery control device, which is applied to the above refrigerant recovery apparatus, and the device includes:
the acquisition module is used for acquiring a system pressure value of the air conditioning system pipeline;
the judging module is used for judging whether the system pressure value reaches a preset pressure value or not;
and the control module is used for opening the first pressure release valve when the system pressure value reaches a preset pressure value so as to recover the refrigerant, so that the refrigerant flows into the refrigerant recovery device.
Preferably, the air conditioning system is further provided with a second pressure relief valve, and correspondingly, the judgment module is further configured to judge whether the system pressure value is smaller than a preset minimum pressure value;
the control module is further used for opening the second pressure release valve and closing the first pressure release valve when the system pressure value is smaller than the preset minimum pressure value so as to release the refrigerant and enable the refrigerant to flow out of the refrigerant recovery device.
Preferably, the judging module is further configured to judge whether the system pressure value is greater than a preset alarm pressure value;
and the control module is also used for opening the first pressure release valve to perform pressure release treatment when the system pressure value is greater than the preset alarm pressure value.
In order to achieve the above object, the present invention also provides an air conditioning apparatus comprising: the refrigerant recovery control device is provided.
In order to achieve the above object, the present invention further provides a computer-readable storage medium, where the storage medium includes a stored program, and when the program runs, the apparatus where the storage medium is located is controlled to execute the refrigerant recovery control method.
In order to achieve the above object, the present invention further provides a processor, where the processor is configured to execute a program, and the program executes the refrigerant recovery control method when running.
According to the technical scheme, compared with the prior art, the invention discloses a refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment.
In addition, when the system pressure value is smaller than the preset pressure value, the second pressure release valve is opened to release the refrigerant, so that the automatic recovery and cyclic utilization of the refrigerant are realized, and the refrigerant recovery cost and the unit operation cost are reduced.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a first flowchart of a refrigerant recovery control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;
fig. 3 is a flowchart of a processing method when a system pressure value is smaller than a preset minimum pressure value according to an embodiment of the present invention;
fig. 4 is a flowchart of a processing method according to an embodiment of the present invention, when a system pressure value gradually increases as a refrigerant enters a system pipeline;
fig. 5 is a second flowchart of a refrigerant recovery control method according to an embodiment of the present invention;
fig. 6 is a flowchart of a processing method when a system pressure value is greater than a preset alarm pressure value according to an embodiment of the present invention;
FIG. 7 is a flowchart of a processing method for gradually decreasing system pressure according to an embodiment of the present invention;
fig. 8 is a schematic block diagram of a refrigerant recovery control device according to an embodiment of the present invention;
fig. 9 is a schematic block diagram of another refrigerant recovery control device according to an embodiment of the present invention.
In fig. 2, 1 denotes a compressor, 2 denotes a four-way valve, 3 denotes an evaporator, 4 denotes a condenser, 5 denotes an electronic expansion valve, 6 denotes a stop valve, 7 denotes a filter, 8 denotes a gas-liquid separator, 9 denotes a pressure sensor, 10 denotes a first relief valve, 11 denotes a refrigerant recovery device, 12 denotes a fan, 13 denotes a second relief valve.
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.
Aiming at the problems in the prior art, the embodiment of the invention discloses a refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment, and aims to realize automatic recovery and cyclic utilization of refrigerants.
Referring to fig. 2, fig. 2 is a schematic diagram of an air conditioning system according to an embodiment of the present invention, in which specific components of a refrigerant recovery device and an installation position thereof are shown, the refrigerant recovery device includes: a first pressure release valve 10, a refrigerant recovery device 11 and a second pressure release valve 13; wherein the content of the first and second substances,
a refrigerant recovery device 11 disposed in a refrigerant recovery branch between the condenser 4 and the evaporator 3 of the air conditioning system;
the first pressure relief valve 10 is arranged on a branch between the condenser 4 and the refrigerant recovery device 11;
and a second relief valve 13 provided in a branch between the refrigerant recovery device 11 and the evaporator 3.
Install refrigerant recovery plant additional on the basis of current air conditioning system pipeline, when the system pressure value reached and predetermine the pressure value, opened first relief valve to retrieve the refrigerant for the refrigerant flows into among the refrigerant recovery unit, thereby realizes the automatic recovery of refrigerant.
In order to further optimize the above technical solution, the refrigerant recovery apparatus further includes:
the pressure sensor 9 is arranged on a pipeline at the inlet end or the outlet end of the compressor 1 of the air conditioning system and used for detecting the system pressure value of the pipeline of the air conditioning system; the system pressure value is used for controlling the opening and closing of the first relief valve 10 and the second relief valve 13.
The pressure value of the air conditioning system pipeline is detected as the system pressure value through a pressure sensor, for example, the pressure sensor is installed on the pipeline near the compressor. The type of the pressure sensor is not limited, and the pressure sensor can detect the pressure of a pipeline in the air conditioning system.
The detection of the system pressure value is realized through the pressure sensor so as to control the opening and closing of the first pressure relief valve 10 and the second pressure relief valve 13, and thus the recycling and utilization of the refrigerant are realized.
Referring to fig. 1, fig. 1 is a flowchart of a refrigerant recovery control method of an air conditioning system according to an embodiment of the present invention, where the method includes the following steps:
s101: acquiring a system pressure value of an air conditioning system pipeline;
as described in the above embodiments, the system pressure value may be detected by a pressure sensor, and the pressure sensor may be installed on a pipeline near the compressor. The type of the pressure sensor is not limited, and the pressure sensor can detect the pressure of a pipeline in the air conditioning system.
S102: judging whether the system pressure value reaches a preset pressure value or not;
the preset pressure value may be a preset pressure value set according to experiment parameters in an experiment process or a preset pressure value set according to historical data monitored when a user actually uses the air conditioner, for example: the preset pressure value can be set to be 2.8 MPa-4.4 MPa.
S103: if the system pressure value reaches the preset pressure value, the first pressure relief valve 10 is opened to recover the refrigerant, so that the refrigerant flows into the refrigerant recovery device.
In a specific implementation, a pressure release valve and a refrigerant recovery branch can be installed in a current air conditioning system, see fig. 2, fig. 2 is a schematic diagram of the air conditioning system provided by an embodiment of the present invention, and a branch of a pressure release valve and a refrigerant recovery device 11 is additionally installed on the basis of a pipeline of the current air conditioning system, wherein the refrigerant recovery device 11 is installed on the refrigerant recovery branch between a condenser 4 and an evaporator 3 of the air conditioning system; the first pressure release valve 10 is arranged on a branch between the condenser 4 and the refrigerant recovery device 11 and is used as a control valve of a refrigerant recovery end; and a second relief valve 13 provided in a branch between the refrigerant recovery device 11 and the evaporator 3 and serving as a control valve of a refrigerant release end.
When the detected system pressure value reaches a preset pressure value, for example: when the detected system pressure value is 3.5MPa, the preset pressure value is 2.8-4.4 MPa, and the system pressure value reaches the preset pressure value, the first pressure release valve 10 is opened, and the refrigerant flows into the refrigerant recovery device 11 under the driving of the pressure, so that the automatic recovery of the refrigerant is realized.
The refrigerant recovery device 11 performs refrigerant recovery, and when the first pressure relief valve 10 is opened, the refrigerant recovery device 11 starts to operate, and the refrigerant in the system pipeline flows into the refrigerant recovery device 11. When the refrigerant recovery device 11 is specifically implemented, the power for recovering and releasing the refrigerant can be further increased through the pump body, and the specific structure of the refrigerant recovery device 11 is not limited herein.
When the system pressure value is judged to reach the preset pressure value, the system pressure value and the preset pressure value can be compared or subjected to subtraction processing, and a corresponding current signal/voltage signal is output according to a comparison result or a subtraction result to control the first pressure release valve 10. When the system pressure value reaches the preset pressure value, the first pressure release valve 10 is opened, so that the refrigerant flows into the refrigerant recovery device 11, and the refrigerant recovery is realized. If the system pressure value does not reach the preset pressure value, the first pressure relief valve 10 maintains the current working state.
In the above embodiment, the system pressure value of the air conditioning system pipeline may be detected in the following several ways:
(1) detecting a system pressure value of an air conditioning system pipeline at regular time;
the time interval for detecting the system pressure value is preset, for example: detecting the system pressure value every 1 min; and if the detected system pressure value reaches a preset pressure value, recovering the refrigerant. This approach is relatively economical.
(2) Detecting a system pressure value of a pipeline of an air conditioning system in real time;
the method for detecting the system pressure value in real time is adopted, and when the system pressure value reaches the preset pressure value, the refrigerant can be recovered, and the method is relatively high in efficiency.
(3) And adaptively adjusting the time interval of detecting the system pressure value according to the detected system pressure value.
When the system pressure value is closer to the preset minimum pressure value and the preset alarm pressure value, the frequency of detecting the system pressure value can be increased, and the frequency of detecting the system pressure value can be properly reduced under other conditions, so that the method is more intelligent.
The method for detecting the system pressure value can be preset by users and workers according to actual conditions and requirements.
In this embodiment, when the detected system pressure value reaches the preset pressure value, the refrigerant is recovered, and the automatic recovery of the refrigerant is realized.
Further preferably, referring to fig. 3, fig. 3 is a flowchart of a processing method when a system pressure value is smaller than a preset minimum pressure value according to an embodiment of the present invention, and specifically includes step S201 and step S202:
s201: judging whether the system pressure value is smaller than a preset minimum pressure value or not;
the first pressure release valve 10 is opened to release pressure, the refrigerant flows to the refrigerant recovery device 11, and in the process of recovering the refrigerant, whether the system pressure value is smaller than a preset minimum pressure value or not is judged, and the preset minimum pressure value can be preset according to experimental parameters or preset minimum pressure values according to historical data monitored when a user actually uses the air conditioner.
S202: if the system pressure value is smaller than the preset minimum pressure value, the second pressure release valve 13 is opened, and the first pressure release valve 10 is closed to release the refrigerant, so that the refrigerant flows out of the refrigerant recovery device.
When the system pressure value is less than the preset minimum pressure value, the two values can be compared or subjected to subtraction processing, the corresponding current signal/voltage signal is output according to the comparison result or the subtraction result to control the second pressure release valve 13, and when the system pressure value is less than the preset minimum pressure value, the second pressure release valve 13 is opened to release the refrigerant, so that the refrigerant flows out of the refrigerant recovery device 11 and flows into the system pipeline. Based on the embodiment, the refrigerant is automatically recovered and recycled.
Further preferably, referring to fig. 4, fig. 4 is a flowchart of a processing method when a system pressure value gradually increases as a refrigerant enters a system pipeline according to an embodiment of the present invention, and specifically includes step S203 and step S204:
s203: judging whether the system pressure value is recovered to a standard pressure value or not;
in the process of releasing the refrigerant, the system pressure is continuously increased along with the refrigerant continuously flowing into a system pipeline, whether the system pressure value is recovered to a standard pressure value or not is judged, and the standard pressure value can be a pressure value preset according to experimental parameters in the experimental process or a pressure value set according to historical data monitored when the air conditioner is actually used by a user.
S204: if the system pressure value is restored to the standard pressure value, the second relief valve 13 is closed, and the refrigerant is stopped to be released.
When judging whether the system pressure value is recovered to the standard pressure value, the system pressure value and the standard pressure value can be compared or subjected to subtraction processing, the corresponding current signal/voltage signal is output according to the comparison result or the subtraction result to control the second pressure release valve 13, and when the system pressure value is recovered to the standard pressure value, the second pressure release valve 13 is closed, and the refrigerant is stopped being released.
Through the embodiment, in the process of releasing the refrigerant, when the detected system pressure value is recovered to the standard pressure value, the refrigerant is automatically stopped to be released, the automation degree is high, the refrigerant is automatically recovered and recycled, and the refrigerant recovery cost and the unit operation cost are reduced.
The following describes a refrigerant recovery control method for an air conditioning system according to an embodiment of the present invention with reference to fig. 5.
Referring to fig. 5, in a specific implementation, the core judgment and control may be implemented by a central processing unit or an automatic controller. No matter in the heating mode, still under the refrigeration mode, the controller all compares the system pressure value that pressure sensor detected with predetermineeing the pressure value, if the system pressure value reaches predetermined pressure value, then control first relief valve 10 and open, carry out the pressure release, the refrigerant of system flows into refrigerant recovery unit, realizes the automatic recovery of refrigerant. And if the system pressure value does not reach the preset pressure value, the first pressure relief valve 10 and the second pressure relief valve 13 do not work. In the pressure relief process, when the system pressure value is detected to be lower than the preset minimum pressure value, the first pressure relief valve 10 is closed, the second pressure relief valve 13 is opened, the refrigerant flows out of the refrigerant recovery device and enters a system pipeline, and the system pressure gradually rises. The system pipeline pressure is gradually increased along with the continuous entering of the refrigerant, and when the system pressure value reaches a standard pressure value, the central processing unit or the automatic controller closes the second pressure release valve 13 by outputting a current/voltage signal, and the recovery and the cyclic utilization of the refrigerant are stopped. And if the pressure value of the system is not less than the preset minimum pressure value, keeping the current working states of the two pressure release valves, and continuously recovering the refrigerant.
Further preferably, referring to fig. 6, fig. 6 is a processing method for when a system pressure value is greater than a preset alarm pressure value according to an embodiment of the present invention, and specifically includes step S301 and step S302:
s301: judging whether the system pressure value is greater than a preset alarm pressure value or not;
the preset alarm pressure value can be preset according to an experiment or set according to historical data monitored when a user actually uses the air conditioner, for example: the preset alarm pressure value may be set to be greater than 4.4 MPa.
S302: and if the system pressure value is greater than the preset alarm pressure value, opening the first pressure release valve 10 to perform pressure release treatment.
If the system pressure value exceeds the preset alarm pressure value, the first pressure release valve 10 is opened to release pressure, the refrigerant enters the refrigerant recovery device 11, the pressure of the unit system is reduced, and the normal operation of the air conditioning system is guaranteed.
Further preferably, referring to fig. 7, fig. 7 is a flowchart of a processing method when the system pressure value gradually decreases according to an embodiment of the present invention, and specifically includes step S303 and step S304:
s303: judging whether the system pressure value is recovered to a standard pressure value or not;
the standard pressure value may be a pressure value preset according to an experiment parameter in an experiment process, or may be a pressure value set according to historical data monitored when a user actually uses the air conditioner.
S304: and if the system pressure value is recovered to the standard pressure value, closing the first pressure relief valve 10 and stopping pressure relief.
In the pressure relief process, whether the system pressure value is recovered to the standard pressure value or not is judged, and if the system pressure value is recovered to the standard pressure value, the first pressure relief valve 10 is closed, and the pressure relief is stopped.
And when the pressure exceeds the standard, the pressure relief valve is opened to relieve the pressure, so that the safe operation of the system is ensured.
Preferably, in the process of pressure relief when the preset alarm pressure value is exceeded, the pump body in the refrigerant recovery device 11 can be started to accelerate the pressure relief, so that the system pressure value is restored to the standard pressure value as soon as possible.
Preferably, when the system pressure value is larger than a preset alarm pressure value, an alarm is triggered. The alarm can be realized by an alarm, and can be realized by a mode of combining sound and light alarms, for example: by adopting the method of combining the alarm red light and the alarm sound, the user or the staff is prompted to timely treat the problems of the air conditioning equipment in an alarm mode, and the loss is avoided.
In addition, an embodiment of the present invention further discloses a refrigerant recovery control device, which is applied to the refrigerant recovery apparatus, and referring to fig. 8, the refrigerant recovery control device includes:
the detection module 101 is used for acquiring a system pressure value of a pipeline of the air conditioning system;
in a specific implementation, the pressure value of the air conditioning system pipeline may be detected as the system pressure value by a pressure sensor, for example, a pressure sensor is installed on the pipeline near the compressor to detect the system pressure value. The type of the pressure sensor is not limited, and the pressure sensor can detect the pressure of a pipeline in the air conditioning system.
The judging module 102 is configured to judge whether a system pressure value reaches a preset pressure value;
the preset pressure value may be a preset pressure value set according to experiment parameters in an experiment process or a preset pressure value set according to historical data monitored when a user actually uses the air conditioner, for example: the preset pressure value can be set to be 2.8 MPa-4.4 MPa.
The control module 103 is configured to open the first pressure release valve 10 when the system pressure value reaches a preset pressure value, so as to recover the refrigerant, and the refrigerant flows into the refrigerant recovery device.
When the detected system pressure value reaches a preset pressure value, for example: when the detected system pressure value is 3.5MPa, the preset pressure value is 2.8 MPa-4.4 MPa, and the system pressure reaches the preset pressure value, the refrigerant is recovered.
The specific scheme for recovering the refrigerant may be that a pressure release valve and a refrigerant recovery device 11 branch are installed in the current air conditioning system, see fig. 2, fig. 2 is a schematic diagram of the air conditioning system provided by the embodiment of the present invention, and the pressure release valve and the refrigerant recovery device 11 branch are additionally installed on the basis of the existing air conditioning system pipeline, wherein the refrigerant recovery device 11 is installed on the refrigerant recovery branch between the condenser 4 and the evaporator 3 of the air conditioning system; the first pressure release valve 10 is arranged on a branch between the condenser 4 and the refrigerant recovery device 11 and is used as a control valve of a refrigerant recovery end; and a second relief valve 13 provided in a branch between the refrigerant recovery device 11 and the evaporator 3 and serving as a control valve of a refrigerant release end.
When the detected system pressure value reaches a preset pressure value, for example: when the detected system pressure value is 3.5MPa, the preset pressure value is 2.8-4.4 MPa, and the system pressure value reaches the preset pressure value, the first pressure release valve 10 is opened, and the refrigerant flows into the refrigerant recovery device 11 under the driving of the pressure, so that the automatic recovery of the refrigerant is realized.
When the refrigerant recovery device 11 is specifically implemented, the power for recovering and releasing the refrigerant can be further increased through the pump body, and the specific structure of the refrigerant recovery device 11 is not limited herein.
When the system pressure value is judged to reach the preset pressure value, the system pressure value and the preset pressure value can be compared or subjected to subtraction processing, and a corresponding current signal/voltage signal is output according to a comparison result or a subtraction result to control the first pressure release valve 10. When the system pressure value reaches the preset pressure value, the first pressure release valve 10 is opened, so that the refrigerant flows into the refrigerant recovery device 11, and the refrigerant recovery is realized.
In the above embodiment, the three implementation manners of detecting the system pressure value of the air conditioning system pipeline may be adopted as described in the above embodiments. The method for detecting the system pressure value can be preset by users and workers according to actual conditions and requirements.
In this embodiment, when the detection module detects that the system pressure value reaches the preset pressure value, the refrigerant is recovered, and automatic recovery of the refrigerant is realized.
Further preferably, on the basis of the foregoing embodiment, when the system pressure value is smaller than the preset minimum pressure value, the determining module 102 is further configured to determine whether the system pressure value is smaller than the preset minimum pressure value;
The control module 103 is further configured to open the second pressure release valve 13 and close the first pressure release valve 10 when the system pressure value is smaller than the preset minimum pressure value, so as to release the refrigerant, and the refrigerant flows out of the refrigerant recovery device.
When the system pressure value is less than the preset minimum pressure value, the two values can be compared or subjected to subtraction processing, the corresponding current signal/voltage signal is output according to the comparison result or the subtraction result to control the second pressure release valve 13, and when the system pressure value is less than the preset minimum pressure value, the second pressure release valve 13 is opened to release the refrigerant, so that the refrigerant flows out of the refrigerant recovery device 11 and flows into the system pipeline. Based on the embodiment, the refrigerant is automatically recovered and recycled.
Preferably, when the system pressure value gradually increases as the refrigerant enters the system pipeline, the determining module 102 is further configured to determine whether the system pressure value is recovered to the standard pressure value;
the standard pressure values mentioned here are the same as those mentioned in the above embodiments.
In the process of releasing the refrigerant, the system pressure is continuously increased along with the refrigerant continuously flowing into a system pipeline, whether the system pressure value is recovered to a standard pressure value or not is judged, and the standard pressure value can be a pressure value preset according to experimental parameters in the experimental process or a pressure value set according to historical data monitored when the air conditioner is actually used by a user.
The control module 103 is further configured to close the second pressure relief valve 13 and stop releasing the refrigerant when the system pressure value is restored to the standard pressure value.
When judging whether the system pressure value is recovered to the standard pressure value, the system pressure value and the standard pressure value can be compared or subjected to subtraction processing, the corresponding current signal/voltage signal is output according to the comparison result or the subtraction result to control the second pressure release valve 13, and when the system pressure value is recovered to the standard pressure value, the second pressure release valve 13 is closed, and the refrigerant is stopped being released.
When the detected system pressure value is recovered to the standard pressure value, the refrigerant is automatically stopped to be released, the automation degree is high, the refrigerant is automatically recycled, and the refrigerant recycling cost and the unit operation cost are reduced.
Further preferably, when the system pressure value is greater than the preset alarm pressure value, the judgment module 102 is further configured to judge whether the system pressure value is greater than the preset alarm pressure value;
the preset alarm pressure value can be preset according to an experiment or set according to historical data monitored when a user actually uses the air conditioner, for example: the preset alarm pressure value may be set to be greater than 4.4 MPa.
The control module 103 is further configured to open the first pressure release valve 10 to perform pressure release processing when the system pressure value is greater than the preset alarm pressure value.
If the system pressure value exceeds the preset alarm pressure value, the first pressure release valve 10 is opened to release pressure, the refrigerant enters the refrigerant recovery device 11, the pressure of the unit system is reduced, and the normal operation of the air conditioning system is guaranteed.
Further preferably, when the system pressure value gradually decreases, the judgment module 102 is further configured to judge whether the system pressure value is restored to the standard pressure value;
the reference pressure value is referred to herein as being the same as the aforementioned reference pressure value. The standard pressure value may be a pressure value preset according to experiment parameters in an experiment process, or may be a pressure value set according to historical data monitored when a user actually uses the air conditioner.
The control module 103 is further configured to close the first pressure relief valve 10 and stop pressure relief when the system pressure value is restored to the standard pressure value.
In the pressure relief process, whether the system pressure value is recovered to the standard pressure value or not is judged, and if the system pressure value is recovered to the standard pressure value, the first pressure relief valve 10 is closed, and the pressure relief is stopped.
And when the pressure exceeds the standard, the pressure relief valve is opened to relieve the pressure, so that the safe operation of the system is ensured.
Preferably, in the process of pressure relief when the preset alarm pressure value is exceeded, the pump body in the refrigerant recovery device 11 can be started to accelerate the pressure relief, so that the system pressure value is restored to the standard pressure value as soon as possible.
Referring to fig. 9, the refrigerant recovery control device of the air conditioning system according to the embodiment of the present invention further includes: an alarm module 104;
the alarm module 104 is configured to alarm when the system pressure value is greater than a preset alarm pressure value.
And when the system pressure value is greater than the preset alarm pressure value, starting an alarm. The alarm can be realized by an alarm, and can be realized by a mode of combining sound and light alarms, for example: by adopting the method of combining the alarm red light and the alarm sound, the user or the staff is prompted to deal with the problems of the air conditioner in time in an alarm mode, and the loss is avoided.
Furthermore, an embodiment of the present invention further discloses an air conditioning apparatus, including: the refrigerant recovery control device.
The refrigerant recovery control device is applied to an air conditioning system, and when the system pressure value reaches a preset pressure value, the first pressure relief valve is controlled to be opened, so that the refrigerant in the system pipeline enters the refrigerant recovery device 11, and the refrigerant is automatically recovered.
And when the system pressure value detected by the pressure sensor is smaller than the preset minimum pressure value, the second pressure release valve 13 is opened, and at this time, the refrigerant stored in the refrigerant recovery device 11 flows into the system pipeline, so that the refrigerant is released, and the recycling of the refrigerant is realized.
When the refrigerant recovery device 11 is specifically implemented, the power for recovering and releasing the refrigerant can be further increased through the pump body, and the specific structure of the refrigerant recovery device 11 is not limited herein.
The air conditioning equipment provided by the invention can realize automatic recovery and cyclic utilization of the refrigerant, and reduce the refrigerant recovery cost and the unit operation cost.
The embodiment of the invention also discloses a computer readable storage medium which comprises a stored program, wherein when the program runs, the equipment where the storage medium is located is controlled to execute the refrigerant recovery control method so as to realize the automatic recovery of the refrigerant.
In addition, the embodiment of the invention also discloses a processor, wherein the processor is used for running the program, and the automatic recovery of the refrigerant can be realized by executing the refrigerant recovery control method when the program runs.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (14)
1. The utility model provides a refrigerant recovery plant, is applied to air conditioning system, its characterized in that, refrigerant recovery plant includes: the refrigerant recovery device comprises a first pressure release valve, a refrigerant recovery device and a second pressure release valve; wherein the content of the first and second substances,
the refrigerant recovery device is arranged on a refrigerant recovery branch between a condenser and an evaporator of the air conditioning system;
the first pressure relief valve is arranged on a branch between the condenser and the refrigerant recovery device;
and the second pressure relief valve is arranged on a branch between the refrigerant recovery device and the evaporator.
2. The refrigerant recovery apparatus according to claim 1, further comprising:
the pressure sensor is arranged on a pipeline at the inlet end or the outlet end of a compressor of the air conditioning system and used for detecting the system pressure value of the pipeline of the air conditioning system; the system pressure value is used for controlling the opening and closing of the first pressure relief valve and the second pressure relief valve.
3. A refrigerant recovery control method applied to the refrigerant recovery apparatus according to claim 1 or 2, the method comprising:
acquiring a system pressure value of the air conditioning system pipeline;
judging whether the system pressure value reaches a preset pressure value or not;
and if the system pressure value reaches a preset pressure value, opening the first pressure release valve to recover the refrigerant, so that the refrigerant flows into the refrigerant recovery device.
4. The refrigerant recovery control method according to claim 3, wherein after obtaining a system pressure value of the air conditioning system pipeline, the method further comprises:
judging whether the system pressure value is smaller than a preset minimum pressure value or not;
and if the system pressure value is smaller than the preset minimum pressure value, opening the second pressure release valve, and closing the first pressure release valve to release the refrigerant, so that the refrigerant flows out of the refrigerant recovery device.
5. The refrigerant recovery control method according to claim 4, further comprising, after the opening the second pressure relief valve and closing the first pressure relief valve to release the refrigerant to flow out of the refrigerant recovery device if the system pressure value is smaller than the preset minimum pressure value:
judging whether the system pressure value is recovered to a standard pressure value or not;
and if the system pressure value is recovered to the standard pressure value, closing the second pressure release valve and stopping releasing the refrigerant.
6. The refrigerant recovery control method according to claim 3, further comprising:
judging whether the system pressure value is greater than a preset alarm pressure value or not;
and if the system pressure value is greater than the preset alarm pressure value, opening a first pressure release valve to perform pressure release treatment.
7. The refrigerant recovery control method according to claim 6, further comprising, after the opening a first pressure release valve and performing pressure release processing if the system pressure value is greater than the preset alarm pressure value:
judging whether the system pressure value is recovered to a standard pressure value or not;
and if the system pressure value is recovered to the standard pressure value, closing the first pressure relief valve and stopping pressure relief.
8. The refrigerant recovery control method according to claim 6 or 7, further comprising: and if the system pressure value is greater than the preset alarm pressure value, triggering an alarm.
9. A refrigerant recovery control device applied to the refrigerant recovery apparatus according to claim 1 or 2, the device comprising:
the acquisition module is used for acquiring a system pressure value of the air conditioning system pipeline;
the judging module is used for judging whether the system pressure value reaches a preset pressure value or not;
and the control module is used for opening the first pressure release valve when the system pressure value reaches a preset pressure value so as to recover the refrigerant, so that the refrigerant flows into the refrigerant recovery device.
10. The refrigerant recovery control device according to claim 9,
the judging module is also used for judging whether the system pressure value is smaller than a preset minimum pressure value;
the control module is further used for opening the second pressure release valve and closing the first pressure release valve when the system pressure value is smaller than the preset minimum pressure value so as to release the refrigerant and enable the refrigerant to flow out of the refrigerant recovery device.
11. The refrigerant recovery control device according to claim 9,
the judging module is also used for judging whether the system pressure value is greater than a preset alarm pressure value;
and the control module is also used for opening the first pressure release valve to perform pressure release treatment when the system pressure value is greater than the preset alarm pressure value.
12. An air conditioning apparatus, characterized by comprising: the refrigerant recovery control device according to any one of claims 9 to 11.
13. A computer-readable storage medium, wherein the storage medium includes a stored program, and when the program runs, the apparatus on which the storage medium is located is controlled to execute the refrigerant recovery control method according to any one of claims 3 to 8.
14. A processor configured to execute a program, wherein the program executes the refrigerant recovery control method according to any one of claims 3 to 8 when the program is executed.
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| CN202011323447.4A CN112413946A (en) | 2020-11-23 | 2020-11-23 | Refrigerant recovery control method and device, refrigerant recovery equipment and air conditioning equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674095A (en) * | 2022-03-16 | 2022-06-28 | 青岛海尔空调器有限总公司 | Air conditioner, method and device for controlling air conditioner refrigerant and storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2208204Y (en) * | 1994-12-07 | 1995-09-20 | 华东工业大学 | Recovery, regenerative and recharging device for refrigerant |
| US20020112490A1 (en) * | 2001-02-20 | 2002-08-22 | Ying Gong | Refrigerant gauge manifold with built-in charging calculator |
| CN1890516A (en) * | 2003-12-10 | 2007-01-03 | 开利公司 | Diagnosing a loss of refrigerant charge in a refrigerant system |
| KR20090020305A (en) * | 2007-08-23 | 2009-02-26 | 엘지전자 주식회사 | Air conditioner |
| CN102132112A (en) * | 2008-05-14 | 2011-07-20 | 开利公司 | Charge management in refrigerant vapor compression systems |
| CN202041032U (en) * | 2011-04-02 | 2011-11-16 | 北京凯运通科技发展有限公司 | Liquid refrigerant conveying device of air conditioning system |
| CN102288251A (en) * | 2010-06-17 | 2011-12-21 | 北汽福田汽车股份有限公司 | Vehicle air conditioner refrigerant filling volume calibration method and system |
| CN202204216U (en) * | 2011-06-21 | 2012-04-25 | 叶必武 | Pressure adjusting device for vehicular air conditioner |
| CN102645063A (en) * | 2006-07-21 | 2012-08-22 | 大金工业株式会社 | Refrigerant charging method for refrigeration device using carbon dioxide as refrigerant |
| CN103306936A (en) * | 2012-03-07 | 2013-09-18 | 住友重机械工业株式会社 | Cryopump system, and method of operating the same, and compressor unit |
-
2020
- 2020-11-23 CN CN202011323447.4A patent/CN112413946A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2208204Y (en) * | 1994-12-07 | 1995-09-20 | 华东工业大学 | Recovery, regenerative and recharging device for refrigerant |
| US20020112490A1 (en) * | 2001-02-20 | 2002-08-22 | Ying Gong | Refrigerant gauge manifold with built-in charging calculator |
| CN1890516A (en) * | 2003-12-10 | 2007-01-03 | 开利公司 | Diagnosing a loss of refrigerant charge in a refrigerant system |
| CN102645063A (en) * | 2006-07-21 | 2012-08-22 | 大金工业株式会社 | Refrigerant charging method for refrigeration device using carbon dioxide as refrigerant |
| KR20090020305A (en) * | 2007-08-23 | 2009-02-26 | 엘지전자 주식회사 | Air conditioner |
| CN102132112A (en) * | 2008-05-14 | 2011-07-20 | 开利公司 | Charge management in refrigerant vapor compression systems |
| CN102288251A (en) * | 2010-06-17 | 2011-12-21 | 北汽福田汽车股份有限公司 | Vehicle air conditioner refrigerant filling volume calibration method and system |
| CN202041032U (en) * | 2011-04-02 | 2011-11-16 | 北京凯运通科技发展有限公司 | Liquid refrigerant conveying device of air conditioning system |
| CN202204216U (en) * | 2011-06-21 | 2012-04-25 | 叶必武 | Pressure adjusting device for vehicular air conditioner |
| CN103306936A (en) * | 2012-03-07 | 2013-09-18 | 住友重机械工业株式会社 | Cryopump system, and method of operating the same, and compressor unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674095A (en) * | 2022-03-16 | 2022-06-28 | 青岛海尔空调器有限总公司 | Air conditioner, method and device for controlling air conditioner refrigerant and storage medium |
| CN114674095B (en) * | 2022-03-16 | 2024-04-23 | 青岛海尔空调器有限总公司 | Air conditioner, method and device for controlling air conditioner refrigerant and storage medium |
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Application publication date: 20210226 |