CN113623907A - Air conditioner refrigerant recovery and charging system and control method thereof - Google Patents
Air conditioner refrigerant recovery and charging system and control method thereof Download PDFInfo
- Publication number
- CN113623907A CN113623907A CN202110793199.8A CN202110793199A CN113623907A CN 113623907 A CN113623907 A CN 113623907A CN 202110793199 A CN202110793199 A CN 202110793199A CN 113623907 A CN113623907 A CN 113623907A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- information
- valve
- pressure
- air conditioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
-
- 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
- F25B2345/001—Charging refrigerant to a cycle
-
- 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
-
- 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
- F25B2345/003—Control issues for charging or collecting refrigerant to or from a cycle
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner refrigerant recovery and charging system and a control method thereof, wherein the air conditioner refrigerant recovery and charging system comprises: the first end of the first pipeline is used for connecting the low-pressure end of the air conditioning system; the first end of the second pipeline is used for connecting the high-pressure end of the air conditioning system; the second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the third pipeline, the second end of the third pipeline is connected with a vacuumizing device, and a vacuumizing electromagnetic valve is arranged on the third pipeline; the first pressure sensor is arranged on the first pipeline; the second pressure sensor is arranged on the second pipeline; the alarm device is used for alarming; the controller is used for acquiring first information of the first pressure sensor and second information of the second pressure sensor; when the first information or the second information is larger than the first threshold value, alarm information is sent and the valve of the vacuumizing electromagnetic valve is controlled to be closed, so that the vacuumizing device can be protected.
Description
Technical Field
The invention relates to the technical field of air conditioner maintenance equipment, in particular to an air conditioner refrigerant recovery and filling system and a control method thereof.
Background
When the air conditioner of the automobile needs maintenance or the air conditioning system has faults, such as leakage, no refrigeration and the like, the air conditioning system needs to be overhauled. During maintenance, firstly, a refrigerant in the air conditioning system is discharged or recycled, then the air conditioning system is pressurized to detect whether leakage exists, once leakage exists, a leakage point needs to be further found for repairing, after repair, the air conditioning system is pumped, finally, the compressor of the automobile air conditioning system is supplemented with the frozen lubricating oil and a new refrigerant, and maintenance is completed.
In the process of pumping pressure to the air conditioning system, a vacuum device is generally needed, and the vacuum device is often easily damaged due to overlarge air pressure, so that the overhaul cost is increased.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides an air conditioner refrigerant recovery and charging system and a control method thereof, which can effectively protect a vacuum pumping device and prevent the vacuum pumping device from being damaged.
In a first aspect, an embodiment of the present invention provides an air conditioner refrigerant recovery and charging system, including:
the first end of the first pipeline is used for connecting the low-pressure end of an air conditioning system;
the first end of the second pipeline is used for connecting the high-pressure end of the air conditioning system;
the second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the third pipeline, the second end of the third pipeline is connected with a vacuumizing device, and a vacuumizing electromagnetic valve is arranged on the third pipeline;
a first pressure sensor disposed on the first conduit;
a second pressure sensor disposed on the second conduit;
the alarm device is used for acquiring alarm information and giving an alarm;
a controller for acquiring first information of the first pressure sensor and acquiring second information of the second pressure sensor; and when the first information is larger than a first threshold value or the second information is larger than the first threshold value, sending the alarm information and controlling a valve of the vacuumizing electromagnetic valve to be closed.
In some embodiments, the air conditioner refrigerant recovery and charging system further comprises a pressure relief solenoid valve, and the second end of the first pipeline and the second end of the second pipeline are both connected to the pressure relief solenoid valve;
the controller is further used for controlling the valve of the pressure relief electromagnetic valve to be opened when the first information is larger than a first threshold value or the second information is larger than the first threshold value.
In some embodiments, the controller is further configured to control the valve of the pressure relief solenoid valve to close and control the valve of the vacuum solenoid valve to open when the first information is smaller than a first threshold and the second information is smaller than a first threshold.
In some embodiments, the air conditioner refrigerant recovery and charging system further includes a mechanical pressure switch, the mechanical pressure switch is disposed at the first end of the third pipeline, the power supply of the vacuum pumping device and the power supply of the vacuum pumping solenoid valve are both connected to the mechanical pressure switch, and the mechanical pressure switch is configured to control the on/off of the power supply of the vacuum pumping device according to the pressure at the first end of the third pipeline.
In some embodiments, the air conditioner refrigerant recovery and charging system further comprises a pressure relief check valve disposed on the third line and between the vacuum solenoid valve and the vacuum extractor.
In some embodiments, a first low-pressure solenoid valve and a second low-pressure solenoid valve are arranged on the first pipeline, and the arrangement directions of the first low-pressure solenoid valve and the second low-pressure solenoid valve are opposite; the second pipeline is provided with a first high-pressure electromagnetic valve and a second high-pressure electromagnetic valve, and the first high-pressure electromagnetic valve and the second high-pressure electromagnetic valve are arranged in opposite directions.
In some embodiments, the air conditioner refrigerant recovery and charging system further comprises a fourth pipeline, a second end of the first pipeline and a second end of the second pipeline are both communicated with a first end of the fourth pipeline, a second end of the fourth pipeline is connected with a leak detection gas filling device, and a first leak detection solenoid valve is arranged on the fourth pipeline;
the controller is further used for controlling the valve of the vacuum solenoid valve to be closed and controlling the valve of the first leak detection solenoid valve to be opened when the first information is smaller than a second threshold value and the second information is smaller than a second threshold value; and periodically acquiring a plurality of first information and a plurality of second information, and determining the sealing condition of the air conditioner refrigerant recovery and charging system according to the variation value among the first information and the variation value among the second information.
In some embodiments, the air conditioner refrigerant recovery and filling system further comprises a fifth pipeline, a second end of the first pipeline and a second end of the second pipeline are both connected with a first end of the fifth pipeline through liquid adding solenoid valves, a second end of the fifth pipeline is connected with a fluorescent agent device, and a second leak detection solenoid valve is arranged on the fifth pipeline; a third pressure sensor is also arranged between the vacuumizing electromagnetic valve of the third pipeline and the vacuumizing device;
the controller is further used for controlling the valve of the vacuum electromagnetic valve to be closed when the first information is smaller than a second threshold value and the second information is smaller than the second threshold value; periodically acquiring third information sent by a plurality of third pressure sensors, and determining the sealing condition of the air-conditioning refrigerant recovery and charging system according to the change value among the third information; and when the sealing condition is non-sealing, controlling the valve of the second leak detection electromagnetic valve and the valve of the liquid adding electromagnetic valve to be opened so as to determine the position of a leak point.
In some embodiments, the air conditioner refrigerant recovery and filling system further comprises a sixth pipeline and a seventh pipeline, wherein a first end of the sixth pipeline is connected with the liquid filling electromagnetic valve, a second end of the sixth pipeline is connected with the frozen oil filling bottle, and the sixth pipeline is provided with an oil filling electromagnetic valve; the second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the seventh pipeline, the second end of the seventh pipeline is connected with a refrigerant filling device, and a filling electromagnetic valve is arranged on the seventh pipeline;
and the controller is also used for controlling the valve of the liquid adding electromagnetic valve, the valve of the oil filling electromagnetic valve and the valve of the filling electromagnetic valve to be opened when the sealing condition is sealing.
In a second aspect, an embodiment of the present invention further provides an air conditioner refrigerant recovery and charging control method, which is applied to the air conditioner refrigerant recovery and charging system according to the first aspect, and the air conditioner refrigerant recovery and charging system control method includes the following steps:
acquiring first information and second information, wherein the first information is from a first pressure sensor, and the second information is from a second pressure sensor;
and when the first information is greater than a first threshold value or the second information is greater than a second threshold value, sending first control information and second control information, wherein the first control information is used for controlling an alarm device to give an alarm, and the second control information is used for controlling a valve of the vacuumizing electromagnetic valve to be closed.
The technical scheme of the invention at least has one of the following advantages or beneficial effects: the air conditioner refrigerant recycling and filling system comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is connected with a low-pressure end of the air conditioner system, the second pipeline is connected with a high-pressure end of the air conditioner system, the third pipeline is communicated with the first pipeline and the second pipeline, the third pipeline is connected with a vacuumizing device, before the air conditioner system is vacuumized by the vacuumizing device, a controller judges whether the current air pressure of the air conditioner refrigerant recycling and filling system is too large according to a first signal acquired by a first pressure sensor arranged on the first pipeline and a second signal acquired by a second pressure sensor arranged on the second pipeline, if the air pressure is too large, a valve of a vacuumizing electromagnetic valve is controlled to be closed, so that the vacuumizing device is prevented from being damaged by too large air pressure, and an alarm device is controlled to alarm to remind a worker that the vacuumizing device cannot be opened.
Drawings
FIG. 1 is a schematic diagram of an air conditioning refrigerant recovery and charging system provided in accordance with an embodiment of the present invention;
fig. 2 is a flowchart of an air conditioner refrigerant recovery and charging control method according to an embodiment of the present invention.
Detailed Description
The embodiments described in the embodiments of the present application should not be construed as limiting the present application, and all other embodiments that can be obtained by a person skilled in the art without making any inventive step shall fall within the scope of protection of the present application.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.
Referring to fig. 1, the air conditioner refrigerant recovery and charging system includes a first pipeline 110, a second pipeline 120, a third pipeline 130, an alarm device (not shown in the figure), and a controller (not shown in the figure), wherein a first end of the first pipeline is used for connecting a low-pressure end of the air conditioner system, a first end of the second pipeline is used for connecting a high-pressure end of the air conditioner system, a second end of the first pipeline and a second end of the second pipeline are both communicated with a first end of the third pipeline, a second end of the third pipeline is connected with a vacuum extractor 131, and a vacuum extractor solenoid valve 132 is disposed on the third pipeline. The first pipeline is provided with a first pressure sensor 111, and the second pipeline is provided with a second pressure sensor 121. The controller is used for acquiring first information of the first pressure sensor and second information of the second pressure sensor, determining whether the air pressure in the first pipeline and the second pipeline is overlarge or not according to the acquired first information and second information, if the first information is larger than a first threshold value, the air pressure in the first pipeline is overlarge, if the second information is larger than the first threshold value, the air pressure in the second pipeline is overlarge, and when any one of the first information or the second information is larger than the first threshold value, alarm information is sent to the alarm device and the valve of the vacuum solenoid valve is controlled to be closed, so that the vacuumizing device is prevented from being damaged by the overlarge air pressure, and the alarm device is used for reminding a worker that the vacuumizing device cannot be opened. It will be appreciated that the evacuation device may be a vacuum pump.
In some embodiments, the air conditioner refrigerant recovery and charging system is further provided with a control panel, the control panel can display that the first pressure sensor and the second pressure sensor detect numerical values, and can also directly display alarm information on the control panel, and in addition, an operator can also directly control the valve of the vacuumizing device and the vacuumizing electromagnetic valve to be opened or closed through the control panel.
In some embodiments, referring to fig. 1, the air conditioner refrigerant recovery and charging system further includes a pressure relief solenoid valve 180, and the second end of the first pipeline and the second end of the second pipeline are both connected to the pressure relief solenoid valve, and when a valve of the pressure relief solenoid valve is opened, the refrigerant gas in the air conditioner system can be discharged from the first pipeline and the second pipeline. The controller is also used for controlling the valve of the pressure relief solenoid valve to be opened when the first information is larger than a first threshold value or the second information is larger than the first threshold value so as to enable the air pressure in the first pipeline and the air pressure in the second pipeline to be below the first threshold value, therefore, subsequent vacuumizing operation can be carried out, and the air pressure entering the vacuumizing device cannot be too large. In addition, on the pipeline at pressure release solenoid valve place, still be provided with relief pressure valve 181, waste oil bottle 182 and waste oil bottle solenoid valve 183, at the in-process of retrieving, air conditioning system's low pressure end is gaseous and the waste oil passes through first pipeline, air conditioning system's high-pressure end is gaseous and the waste oil passes through the second pipeline, wherein, gaseous through the discharge of pressure release solenoid valve, the waste oil gets into the relief pressure valve through the pressure release solenoid valve and slows down speed, gets into the waste oil bottle through waste oil bottle solenoid valve at last and is retrieved.
In some embodiments, after the first pipeline and the second pipeline are depressurized by the depressurization electromagnetic valve, the air pressures of the first pipeline and the second pipeline are reduced, and when the first information detected by the first pressure sensor is smaller than a first threshold and the second information detected by the second pressure sensor is smaller than the first threshold, the controller controls the valve of the depressurization electromagnetic valve to close and controls the valve of the vacuum electromagnetic valve to open, so that the vacuumizing device is opened to vacuumize the air conditioning system.
In some embodiments, referring to fig. 1, the air conditioner refrigerant recovery and charging system further includes a mechanical pressure switch 190 disposed at the second end of the third pipeline, and the power supply of the vacuum pumping device and the power supply of the vacuum solenoid valve are connected to the mechanical pressure switch. The vacuumizing device belongs to one of core components of an air conditioner refrigerant recovery and filling system, has high cost and can not be damaged under normal conditions, the vacuumizing device is used for vacuumizing the air conditioner system after the refrigerant gas in the air conditioner system is discharged, so that negative pressure is generated in the air conditioner system, and further the subsequent work of detecting leakage and filling refrigerant oil and refrigerant is completed, and the vacuumizing device can generally bear negative pressure but not positive pressure, therefore, a mechanical pressure switch is arranged to provide multiple protection for the air conditioner refrigerant recovery and filling system, when the air pressure which is about to enter the vacuumizing device is still too large under the condition that a first pressure sensor or a second pressure sensor fails, when the air pressure at the mechanical pressure switch exceeds the critical value, the mechanical pressure switch directly disconnects a power supply of the vacuumizing device and the power supply of a vacuumizing electromagnetic valve to prevent the vacuumizing device from being damaged, when the air pressure at the mechanical pressure switch is lower than the critical value, the vacuum electromagnetic valve and the vacuum pump are electrified to work normally. The critical value of the mechanical pressure switch can be adjusted and is generally set within the range of 0-20 bar.
In some embodiments, referring to fig. 1, the air conditioner refrigerant recovery and charging system further includes a pressure relief check valve 133 disposed on the third line and between the vacuum solenoid valve and the vacuum device. The air passing through the pressure relief one-way valve only flows in one direction, and is stopped when the air flows in the opposite direction. Specifically, the pressure relief check valve may be installed above the vacuum pump, and when gas larger than a pressure relief critical value of the pressure relief check valve flows into the vacuum pump, the check valve is triggered to open for pressure relief, thereby protecting the vacuum pump from being damaged by high-pressure gas.
In some embodiments, referring to fig. 1, a first low pressure solenoid 112 and a second low pressure solenoid 113 are further disposed on the first pipe, and the directions of the first low pressure solenoid and the second low pressure solenoid are opposite, and a first high pressure solenoid 122 and a second high pressure solenoid 123 are further disposed on the second pipe, and the directions of the first high pressure solenoid and the second high pressure solenoid are opposite. Because the solenoid valve itself has the directionality, with the gas that this air conditioner refrigerant recovery and fill system was suitable for belongs to the high pressure, and whole operation flow need carry out two-way operation, for example high-pressure gas leaves air conditioner refrigerant recovery and fills the system from vehicle air conditioner system when retrieving, flows to vehicle air conditioner system from air conditioner refrigerant recovery and fills the system when filling, in order to avoid the solenoid valve to receive reverse gas to open, so adopt the solenoid valve of two opposite direction installations. In addition, a low-pressure end pressure gauge 114 can be arranged on the first pipeline, and a high-pressure end pressure gauge 124 can be arranged on the second pipeline, so that an operator can conveniently read the air pressures of the high-pressure end and the low-pressure end in real time.
In some embodiments, the air conditioner refrigerant recovery and charging system further includes a fourth pipeline 140, the second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the fourth pipeline, the second end of the fourth pipeline is connected with a leak detection gas filling device 142, the fourth pipeline is further provided with two first leak detection solenoid valves 141, and the two first leak detection solenoid valves are installed in opposite directions. The controller is connected with a first leakage detection electromagnetic valve, after the air conditioner refrigerant recovery and filling system is connected with the air conditioner system, the controller firstly controls the valve of the pressure relief electromagnetic valve to be opened, refrigerant gas in the air conditioner system is discharged, when the values of the first information and the second information received by the controller are smaller than a first threshold value, the fact that the air pressure in the first pipeline and the air pressure in the second pipeline reach the standard of entering the vacuum pumping device is proved, then the controller controls the valve of the pressure relief electromagnetic valve to be closed, the valve of the vacuum pumping electromagnetic valve is controlled to be opened, and the vacuum pumping device is controlled to start working. And then judging whether the air-conditioning system reaches a vacuum state or not according to the values of the first pressure sensor and the second pressure sensor, and when the first information is smaller than a second threshold value and the second information is smaller than the second threshold value, indicating that the air-conditioning system reaches the vacuum state, wherein the second threshold value can be set to-80 kilopascals, and controlling the valve of the vacuum electromagnetic valve to be closed and controlling the vacuumizing device to stop working. After the vacuumizing process is finished, the air conditioner refrigerant recovery and filling system needs to be subjected to leak detection, and specifically, after the vacuumizing process is finished, a valve of a first leak detection electromagnetic valve is controlled to be opened, so that leak detection gas in the leak detection gas filling device is injected into the air conditioner refrigerant recovery and filling system. After a certain amount of leak detection gas is injected into the air conditioner refrigerant recovery and filling system to close a valve of the first leak detection electromagnetic valve, a plurality of first information and a plurality of second information are periodically obtained, the sealing condition of the air conditioner refrigerant recovery and filling system is determined according to the variation values among the plurality of first information and the variation values among the plurality of second information, under the normal sealing condition, the values of the first information and the values of the second information do not change, and the detection results of the first pressure sensor and the second pressure sensor may slightly float, so that when the variation values among the plurality of first information and the variation values among the plurality of second information are smaller than the floating range, the sealing of the air conditioner refrigerant recovery and filling system is indicated, and otherwise, the sealing is not performed. When the sealing condition is not sealing, a special instrument can be used for detecting to determine the position of the leak point.
It should be noted that after the leak location is determined by a special instrument and repaired, the air-conditioned refrigerant recovery and filling system needs to be evacuated again.
In another leak detection mode, referring to fig. 1, the air conditioner refrigerant recovery and filling system further includes a fifth pipeline 150, a second end of the first pipeline and a second end of the second pipeline are both connected to a first end of the fifth pipeline through a liquid adding solenoid valve 1100, a second end of the fifth pipeline is connected to a phosphor device 152, and a second leak detection solenoid valve 151 is disposed on the fifth pipeline. A third pressure sensor 134 is also provided between the vacuum solenoid valve of the third line and the vacuum means. The controller is further used for controlling the valve of the vacuum solenoid valve to be closed when the first information is smaller than a second threshold value and the second information is smaller than the second threshold value, periodically obtaining third information sent by the third pressure sensors, determining the sealing condition of the air-conditioning refrigerant recovery and filling system according to the change value among the third information, and controlling the valve of the second leak detection solenoid valve and the valve of the liquid filling solenoid valve to be opened and filling fluorescent agent into the air-conditioning refrigerant recovery and filling system when the sealing condition is not sealed so as to determine the position of a leak point. Specifically, after the fluorescent agent is filled and a valve of the second leak detection electromagnetic valve is closed, a worker wears special glasses, and the position of the fluorescent agent can be identified through the special glasses, so that a leak point can be accurately found.
In some embodiments, after the air conditioning system reaches a vacuum state, the valve of the vacuum solenoid valve is controlled to be closed, and the vacuumizing device is controlled to stop working, the fluorescent agent can be directly injected into the air conditioning system to directly perform leak detection and determine a leak point, and the fluorescent agent is injected in a mode that no air leakage exists in an air conditioning refrigerant recovery and filling system, so that vacuumizing is not required again.
In some embodiments, referring to fig. 1, the air conditioner refrigerant recovery and filling system further includes a sixth line 160 and a seventh line 170, a first end of the sixth line is connected to the filling solenoid valve, a second end of the sixth line is connected to the frozen oil filling bottle 162, and the sixth line is provided with a filling solenoid valve 161. The second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the seventh pipeline, the second end of the seventh pipeline is connected with a refrigerant filling device 172, a filling electromagnetic valve 171 is arranged on the seventh pipeline, and the two filling electromagnetic valves can be arranged in opposite directions. In the leak detection process, if the sealing condition obtained by the controller is sealing, the valve of the liquid adding electromagnetic valve, the valve of the oil adding electromagnetic valve and the valve of the filling electromagnetic valve are controlled to be opened, so that new refrigerant and refrigeration oil are filled into the air conditioning system. In addition, the seventh pipeline can also be provided with a gas pressure gauge, so that an operator can conveniently read the flow of the refrigerant in the seventh pipeline in real time, and the seventh pipeline can also be provided with a pressure sensor, so that the controller can control the flow of the refrigerant through the value of the pressure sensor of the seventh pipeline.
Referring to fig. 2, the method for controlling the air conditioner refrigerant recovery and charging system includes the following steps 210 and 220.
Step 210, acquiring first information and second information, wherein the first information is from a first pressure sensor, and the second information is from a second pressure sensor;
and step 220, when the first information is greater than a first threshold value or the second information is greater than a second threshold value, sending first control information and second control information, wherein the first control information is used for controlling an alarm device to give an alarm, and the second control information is used for controlling a valve of the vacuumizing electromagnetic valve to be closed.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. An air conditioner refrigerant recovery and charging system, comprising:
the first end of the first pipeline is used for connecting the low-pressure end of an air conditioning system;
the first end of the second pipeline is used for connecting the high-pressure end of the air conditioning system;
the second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the third pipeline, the second end of the third pipeline is connected with a vacuumizing device, and a vacuumizing electromagnetic valve is arranged on the third pipeline;
a first pressure sensor disposed on the first conduit;
a second pressure sensor disposed on the second conduit;
the alarm device is used for acquiring alarm information and giving an alarm;
a controller for acquiring first information of the first pressure sensor and acquiring second information of the second pressure sensor; and when the first information is larger than a first threshold value or the second information is larger than the first threshold value, sending the alarm information and controlling a valve of the vacuumizing electromagnetic valve to be closed.
2. The air conditioner refrigerant recovery and charging system of claim 1, further comprising a pressure relief solenoid valve, wherein the second end of the first pipeline and the second end of the second pipeline are both connected to the pressure relief solenoid valve;
the controller is further used for controlling the valve of the pressure relief electromagnetic valve to be opened when the first information is larger than a first threshold value or the second information is larger than the first threshold value.
3. The air conditioner refrigerant recovery and charging system of claim 2, wherein the controller is further configured to control the valve of the pressure relief solenoid valve to close and the valve of the vacuum solenoid valve to open when the first message is less than a first threshold and the second message is less than a first threshold.
4. The air conditioner refrigerant recovery and charging system as claimed in claim 1, further comprising a mechanical pressure switch disposed at the first end of the third pipeline, wherein the power supply of the vacuum extractor and the power supply of the vacuum extractor solenoid valve are both connected to the mechanical pressure switch, and the mechanical pressure switch is configured to control the on/off of the power supply of the vacuum extractor according to the pressure at the first end of the third pipeline.
5. The air conditioner refrigerant recovery and charging system of claim 3, further comprising a pressure relief check valve disposed on the third line and between the vacuum solenoid valve and the vacuum device.
6. An air conditioner refrigerant recovery and charging system as claimed in claim 1, wherein said first line is provided with a first low pressure solenoid valve and a second low pressure solenoid valve, said first low pressure solenoid valve and said second low pressure solenoid valve being disposed in opposite directions; the second pipeline is provided with a first high-pressure electromagnetic valve and a second high-pressure electromagnetic valve, and the first high-pressure electromagnetic valve and the second high-pressure electromagnetic valve are arranged in opposite directions.
7. An air conditioner refrigerant recovery and charging system as claimed in claim 3, further comprising a fourth pipeline, wherein a second end of the first pipeline and a second end of the second pipeline are both communicated with a first end of the fourth pipeline, a second end of the fourth pipeline is connected with a leak detection gas charging device, and a first leak detection solenoid valve is arranged on the fourth pipeline;
the controller is further used for controlling the valve of the vacuum solenoid valve to be closed and controlling the valve of the first leak detection solenoid valve to be opened when the first information is smaller than a second threshold value and the second information is smaller than a second threshold value; and periodically acquiring a plurality of first information and a plurality of second information, and determining the sealing condition of the air conditioner refrigerant recovery and charging system according to the variation value among the first information and the variation value among the second information.
8. The air conditioner refrigerant recovery and charging system as recited in claim 3, further comprising a fifth pipeline, wherein a second end of said first pipeline and a second end of said second pipeline are both connected to a first end of said fifth pipeline via a filling solenoid valve, a second end of said fifth pipeline is connected to a phosphor device, and a second leak detection solenoid valve is disposed on said fifth pipeline; a third pressure sensor is also arranged between the vacuumizing electromagnetic valve of the third pipeline and the vacuumizing device;
the controller is further used for controlling the valve of the vacuum electromagnetic valve to be closed when the first information is smaller than a second threshold value and the second information is smaller than the second threshold value; periodically acquiring third information sent by a plurality of third pressure sensors, and determining the sealing condition of the air-conditioning refrigerant recovery and charging system according to the change value among the third information; and when the sealing condition is non-sealing, controlling the valve of the second leak detection electromagnetic valve and the valve of the liquid adding electromagnetic valve to be opened so as to determine the position of a leak point.
9. The air conditioner refrigerant recovery and charging system as claimed in claim 8, further comprising a sixth pipeline and a seventh pipeline, wherein a first end of the sixth pipeline is connected to the charging solenoid valve, a second end of the sixth pipeline is connected to the refrigerant oil charging bottle, and the sixth pipeline is provided with a charging solenoid valve; the second end of the first pipeline and the second end of the second pipeline are both communicated with the first end of the seventh pipeline, the second end of the seventh pipeline is connected with a refrigerant filling device, and a filling electromagnetic valve is arranged on the seventh pipeline;
and the controller is also used for controlling the valve of the liquid adding electromagnetic valve, the valve of the oil filling electromagnetic valve and the valve of the filling electromagnetic valve to be opened when the sealing condition is sealing.
10. An air conditioner refrigerant recovery and charging control method applied to the air conditioner refrigerant recovery and charging system of claim 1, comprising the steps of:
acquiring first information and second information, wherein the first information is from a first pressure sensor, and the second information is from a second pressure sensor;
and when the first information is greater than a first threshold value or the second information is greater than the first threshold value, sending first control information and second control information, wherein the first control information is used for controlling an alarm device to give an alarm, and the second control information is used for controlling a valve of the vacuumizing electromagnetic valve to be closed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793199.8A CN113623907A (en) | 2021-07-14 | 2021-07-14 | Air conditioner refrigerant recovery and charging system and control method thereof |
| PCT/CN2021/117071 WO2023284095A1 (en) | 2021-07-14 | 2021-09-08 | Air conditioning refrigerant recovery and charging system and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793199.8A CN113623907A (en) | 2021-07-14 | 2021-07-14 | Air conditioner refrigerant recovery and charging system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113623907A true CN113623907A (en) | 2021-11-09 |
Family
ID=78379656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110793199.8A Pending CN113623907A (en) | 2021-07-14 | 2021-07-14 | Air conditioner refrigerant recovery and charging system and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113623907A (en) |
| WO (1) | WO2023284095A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538716B (en) * | 2023-04-14 | 2023-10-20 | 深圳市泰路科技有限公司 | Refrigerant recovery filling machine operation monitoring system based on data analysis |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201100800Y (en) * | 2007-09-19 | 2008-08-13 | 诸暨市鸿森机械有限公司 | A cold medium return injector |
| CN101256016A (en) * | 2007-03-31 | 2008-09-03 | 何长江 | Dual-purpose integrated machine for air conditioner and water heater |
| JP2008240765A (en) * | 2007-03-26 | 2008-10-09 | Neriki:Kk | Shut-off valve and manifold valve for refrigerant pouring provided with this |
| US20110100037A1 (en) * | 2004-11-19 | 2011-05-05 | Boyd David J | Refrigerant recovery method and apparatus |
| CN102840722A (en) * | 2011-06-21 | 2012-12-26 | 叶必武 | Refrigerant recovering and filling machine of vehicle air conditioner |
| CN203132233U (en) * | 2013-02-18 | 2013-08-14 | 武汉理工大学 | Automatic fluorescent agent filling mechanism of automotive air conditioner refrigerant recovery filling machine |
| US20130319025A1 (en) * | 2012-05-29 | 2013-12-05 | Service Solutions U.S. Llc | Refrigerant Recovery Unit with Diagnostic Interface |
| CN203744741U (en) * | 2014-02-27 | 2014-07-30 | 宁波恒普真空技术有限公司 | Device for preventing mutual blow-by of nitrogen and argon in vacuum degreasing sintering furnace |
| CN106338166A (en) * | 2016-08-05 | 2017-01-18 | 浙江吉利控股集团有限公司 | Intelligent refrigerant charging and recovering device |
| CN106568250A (en) * | 2016-10-28 | 2017-04-19 | 浙江飞越机电有限公司 | Refrigerant filling machine and method for carrying out vacuum-pumping, leakage detecting and refrigerant filling by utilizing refrigerant filling machine |
| CN110095237A (en) * | 2019-05-24 | 2019-08-06 | 百尔制冷(无锡)有限公司 | A kind of leak hunting method of refrigeration system |
| CN212509546U (en) * | 2020-07-14 | 2021-02-09 | 常州市都灵控制器有限公司 | Two-way circulation solenoid valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005106413A (en) * | 2003-09-30 | 2005-04-21 | Sanyo Electric Co Ltd | Refrigerant cycle device |
| CN102645062B (en) * | 2012-04-18 | 2014-05-07 | 奇瑞汽车股份有限公司 | Automobile air conditioning liquid filling equipment and filling method thereof |
| CN208154889U (en) * | 2018-03-21 | 2018-11-27 | 广州巴兰仕机械有限公司 | A kind of gas and oil separating plant of the vacuum drawn for refrigerant recovery system |
-
2021
- 2021-07-14 CN CN202110793199.8A patent/CN113623907A/en active Pending
- 2021-09-08 WO PCT/CN2021/117071 patent/WO2023284095A1/en unknown
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110100037A1 (en) * | 2004-11-19 | 2011-05-05 | Boyd David J | Refrigerant recovery method and apparatus |
| JP2008240765A (en) * | 2007-03-26 | 2008-10-09 | Neriki:Kk | Shut-off valve and manifold valve for refrigerant pouring provided with this |
| CN101256016A (en) * | 2007-03-31 | 2008-09-03 | 何长江 | Dual-purpose integrated machine for air conditioner and water heater |
| CN201100800Y (en) * | 2007-09-19 | 2008-08-13 | 诸暨市鸿森机械有限公司 | A cold medium return injector |
| CN102840722A (en) * | 2011-06-21 | 2012-12-26 | 叶必武 | Refrigerant recovering and filling machine of vehicle air conditioner |
| US20130319025A1 (en) * | 2012-05-29 | 2013-12-05 | Service Solutions U.S. Llc | Refrigerant Recovery Unit with Diagnostic Interface |
| CN203132233U (en) * | 2013-02-18 | 2013-08-14 | 武汉理工大学 | Automatic fluorescent agent filling mechanism of automotive air conditioner refrigerant recovery filling machine |
| CN203744741U (en) * | 2014-02-27 | 2014-07-30 | 宁波恒普真空技术有限公司 | Device for preventing mutual blow-by of nitrogen and argon in vacuum degreasing sintering furnace |
| CN106338166A (en) * | 2016-08-05 | 2017-01-18 | 浙江吉利控股集团有限公司 | Intelligent refrigerant charging and recovering device |
| CN106568250A (en) * | 2016-10-28 | 2017-04-19 | 浙江飞越机电有限公司 | Refrigerant filling machine and method for carrying out vacuum-pumping, leakage detecting and refrigerant filling by utilizing refrigerant filling machine |
| CN110095237A (en) * | 2019-05-24 | 2019-08-06 | 百尔制冷(无锡)有限公司 | A kind of leak hunting method of refrigeration system |
| CN212509546U (en) * | 2020-07-14 | 2021-02-09 | 常州市都灵控制器有限公司 | Two-way circulation solenoid valve |
Non-Patent Citations (1)
| Title |
|---|
| 秦航等: "《汽车空调***故障诊断与维修》", 31 August 2014, 同济大学出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023284095A1 (en) | 2023-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104364523B (en) | System and method for a compressor | |
| CN101566517B (en) | Method for judging refrigerant leakage of air-conditioner | |
| CN107631413A (en) | Exhaust gas temperature sensor releases fault detection method and device and air conditioner | |
| CN210719584U (en) | Vehicle-mounted hydrogen system detection and filling device | |
| CN108332958B (en) | Multifunctional electromagnetic pneumatic stop valve test bed | |
| CN103827491A (en) | System and method for diagnosing a reciprocating compressor | |
| CN113623907A (en) | Air conditioner refrigerant recovery and charging system and control method thereof | |
| US8955342B2 (en) | Refrigeration system and method of operating a refrigeration system | |
| US20090235673A1 (en) | Detection of refrigerant release in co2 refrigerant systems | |
| CN201432658Y (en) | Brake and emergency brake system under safety early warning state | |
| CN110375466B (en) | Device and method for detecting refrigerant leakage of air source heat pump system | |
| CN110595701A (en) | Air tightness detection system and method for automobile air brake system | |
| CN2854564Y (en) | Pressure testing device for vehicle air intake pipe | |
| CN112325148A (en) | Device and method for measuring initial pressure of vehicle-mounted gas cylinder for hydrogenation station | |
| US8631662B2 (en) | Testing system and method for AC system in a vehicle | |
| JPH0510572B2 (en) | ||
| CN212511970U (en) | Refrigerant recovery system, compressor test device and air conditioning system | |
| CN115752906A (en) | CO2 leakage amount detection method | |
| CN103712749A (en) | Method for detecting leakage rate of refrigerant of air conditioners in train | |
| US9684293B2 (en) | Refrigerant relief valve monitoring system and method | |
| WO2023103111A1 (en) | Integrated control valve and refrigerant filling machine | |
| CN116380367B (en) | Hydrogen leakage monitoring device and monitoring method for shock tube of high-pressure hydrogen driver | |
| CN215764587U (en) | Nitrogen-hydrogen tracer gas filling machine | |
| CN105716199B (en) | Air conditioning pressure self-checking device and method | |
| CN118198434A (en) | Hydrogen fuel cell leakage monitoring and alarming system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211109 |
|
| RJ01 | Rejection of invention patent application after publication |