CN110726508A - Vacuum degree and vacuum leakage detection method based on automatic evacuation system - Google Patents
Vacuum degree and vacuum leakage detection method based on automatic evacuation system Download PDFInfo
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- CN110726508A CN110726508A CN201911049788.4A CN201911049788A CN110726508A CN 110726508 A CN110726508 A CN 110726508A CN 201911049788 A CN201911049788 A CN 201911049788A CN 110726508 A CN110726508 A CN 110726508A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/34—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines
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Abstract
The invention discloses a method for detecting vacuum degree and vacuum leakage based on an automatic evacuation system, which comprises the following steps: the controller judges whether the tested equipment on the preset track is connected with the vacuum pump; in the countdown of the first timer, the controller judges whether the pressure value reaches a leakage pressure value; in the countdown of the second timer, the controller judges whether the pressure value is kept within the micro-leakage pressure range value; in the countdown of the third timer, the controller judges whether the pressure value reaches a standard vacuum pressure value; and if the pressure value is determined to reach the standard vacuum pressure value, the controller judges that the tested equipment is qualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to the preset position along the preset track. Through the mode, the detection method disclosed by the invention can be used for precisely detecting the vacuum degree, the vacuum leakage condition and the vacuum microleakage condition of the air conditioner, and the detection accuracy and the performance of the air conditioner are greatly improved.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a method for detecting vacuum degree and vacuum leakage based on an automatic evacuation system.
Background
In order to ensure the performance of the air conditioner, before the air conditioner injects the refrigerant, the vacuum degree detection is carried out on the whole cavity communicated with the pipeline, the condenser and the compressor, and the refrigerant can be injected only when the vacuum degree condition meets the standard, so that the best performance is realized.
However, as the number of related parts of the cavity is large, leakage or micro-leakage is easy to occur, and in the traditional mode, only the vacuum degree is detected, and the leakage condition of the air conditioner is not detected, so that the performance of the air conditioner is greatly influenced.
Disclosure of Invention
The invention mainly solves the technical problem of providing a vacuum degree and vacuum leakage detection method based on an automatic evacuation system, which can detect the vacuum degree and vacuum leakage condition of an air conditioner and greatly improve the performance of the air conditioner.
In order to solve the technical problems, the invention adopts a technical scheme that: the method comprises the following steps of setting a preset track of the tested device, driving the tested device to move along the preset track, vacuumizing the tested device, detecting a sensor of the vacuum degree of the tested device and a controller connected with the conveying mechanism, the vacuum pump and the sensor, wherein the controller is used for controlling the vacuum degree and the vacuum leakage of the tested device, and the controller is used for controlling the vacuum degree and the vacuum leakage of the tested device to be detected and comprises the following steps: the controller judges whether the tested equipment on the preset track is connected with the vacuum pump; if so, the controller controls the conveying mechanism to drive the tested equipment to move along the preset track, controls the vacuum pump to vacuumize the tested equipment, and utilizes the first timer to count down according to first preset time; in the countdown of the first timer, the controller judges whether the pressure value reaches a leakage pressure value; if the pressure value is determined to reach the leakage pressure value, the controller controls the tested equipment to be disconnected with the vacuum pump, the first timer is reset, and the second timer is utilized to count down according to second preset time; in the countdown of the second timer, the controller judges whether the pressure value is kept within the micro-leakage pressure range value; if the pressure value is determined to be kept within the micro-leakage pressure range value, after the countdown of the second timer is finished, the controller controls the tested equipment to be connected with the vacuum pump again, controls the vacuum pump to vacuumize the tested equipment again, and utilizes a third timer to count down according to third preset time; in the countdown of the third timer, the controller judges whether the pressure value reaches a standard vacuum pressure value; if the pressure value is determined to reach the standard vacuum pressure value, the controller judges that the tested equipment is qualified, controls the tested equipment to be disconnected with the vacuum pump, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to the preset position along the preset track.
Further, the method further comprises: and if the pressure value does not reach the leakage pressure value, the controller generates an alarm, judges that the tested equipment is unqualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to a preset position along the preset track.
Further, the method further comprises: and if the pressure value is determined not to be kept within the micro-leakage pressure range value, the controller generates an alarm, judges that the tested equipment is unqualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to a preset position along the preset track.
Further, the method further comprises: and if the pressure value does not reach the standard vacuum pressure value, the controller generates an alarm, judges that the tested equipment is unqualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, controls the conveying mechanism to continuously drive the tested equipment to travel to a preset position along a preset track, and controls the tested equipment to be disconnected with the vacuum pump.
Further, the automatic evacuation system further comprises an identifier for identifying an identification code on the device under test, and before the step of determining whether the device under test on the preset track is connected to the vacuum pump, the method further comprises: identifying the identification code of the tested equipment installed on the preset track by using the identifier; and acquiring standard operation information corresponding to the identification code, wherein the standard operation information comprises a leakage pressure value, a micro-leakage pressure range value and a preset standard vacuum pressure value.
Further, the method further comprises: and carrying out statistical analysis on each tested device and giving a histogram or a distribution graph, wherein the histogram or the distribution graph comprises the qualified and unqualified quantity of the tested device, the qualified and unqualified percentage of the tested device and the qualified and unqualified model of the tested device.
Further, the device under test includes a pipeline, a condenser and a compressor, wherein the pipeline, the condenser and the compressor are communicated with each other and form a communication cavity, wherein the step of controlling the vacuum pump to vacuumize the device under test includes: and controlling a vacuum pump to vacuumize a communicating cavity communicated among the pipeline of the tested device, the condenser and the compressor.
Further, the device to be tested is an air conditioner.
Further, the preset track includes a linear track and an annular track.
The invention has the beneficial effects that: different from the prior art, the method for detecting the vacuum degree and the vacuum leakage based on the automatic evacuation system disclosed by the invention comprises the following steps: the controller judges whether the tested equipment on the preset track is connected with the vacuum pump; if so, the controller controls the conveying mechanism to drive the tested equipment to move along the preset track, controls the vacuum pump to vacuumize the tested equipment, and utilizes the first timer to count down according to first preset time; in the countdown of the first timer, the controller judges whether the pressure value reaches a leakage pressure value; if the pressure value is determined to reach the leakage pressure value, the controller controls the tested equipment to be disconnected with the vacuum pump, the first timer is reset, and the second timer is utilized to count down according to second preset time; in the countdown of the second timer, the controller judges whether the pressure value is kept within the micro-leakage pressure range value; if the pressure value is determined to be kept within the micro-leakage pressure range value, after the countdown of the second timer is finished, the controller controls the tested equipment to be connected with the vacuum pump again, controls the vacuum pump to vacuumize the tested equipment again, and utilizes a third timer to count down according to third preset time; in the countdown of the third timer, the controller judges whether the pressure value reaches a standard vacuum pressure value; if the pressure value is determined to reach the standard vacuum pressure value, the controller judges that the tested equipment is qualified, controls the tested equipment to be disconnected with the vacuum pump, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to the preset position along the preset track. Through the mode, the detection method of the vacuum degree and the vacuum leakage based on the automatic evacuation system can be used for precisely detecting the vacuum degree, the vacuum leakage condition and the vacuum microleakage condition of the air conditioner, and greatly improves the detection accuracy and the performance of the air conditioner.
Drawings
Figure 1 is a schematic diagram of the construction of the automatic evacuation system of the present invention;
fig. 2 is a schematic flow chart of the detection method of vacuum degree and vacuum leakage based on the automatic evacuation system of the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
The invention discloses an automatic evacuation system, as shown in fig. 1, the automatic evacuation system comprises a preset track for mounting a device under test 10, a conveying mechanism for driving the device under test 10 to move along the preset track, a vacuum pump 11 for evacuating the device under test 10, a sensor 111 for detecting the vacuum degree of the device under test 10, and a controller 12 connected with the conveying mechanism, the vacuum pump 11 and the sensor 111.
It should be understood that a plurality of devices under test 10 may be mounted on the predetermined track, and the devices under test and the vacuum pumps 11 are in one-to-one correspondence, that is, a plurality of vacuum pumps 11 are arranged on the predetermined track at intervals.
Preferably, the device under test 10 comprises an air conditioner. It should be understood that the present embodiment is not limited to the device under test including an air conditioner, and in other embodiments, the device under test may also be used for detection of other air-tight devices.
In the present embodiment, the preset track includes a straight track and a circular track. It should be understood that when the device under test is a small-sized vacuum device, the device under test is mounted using an annular rail, and when the device under test is a large-sized vacuum device, the device under test is mounted using a linear rail.
Referring to fig. 2, the method for detecting vacuum degree and vacuum leakage based on the automatic evacuation system comprises the following steps:
step S101: the controller 12 determines whether the device under test 10 on the preset orbit is connected to the vacuum pump 11.
It should be understood that the vacuum pump 11 is provided with a cannula, and therefore, the determination of whether the device under test on the predetermined track is connected to the vacuum pump is mainly to determine whether the cannula of the vacuum tube is inserted into the device under test, and if the cannula is inserted into the device under test 10, it is determined that the device under test 10 is connected to the vacuum pump 11.
Step S102: if yes, the controller 12 controls the conveying mechanism to drive the tested device 10 to move along the preset track, controls the vacuum pump 11 to vacuumize the tested device 10, and counts down according to a first preset time by using a first timer.
It should be appreciated that in step S102, when it is determined that the device under test 10 is connected to the vacuum pump 11, the movement of the device under test 10, the evacuation of the device under test 10, and the first timer countdown are performed synchronously.
In addition, the first preset time is set manually and can be modified according to actual needs.
It should be noted that the sensor 111 is disposed at the input port of the vacuum pump 11, and when the vacuum pump 11 vacuumizes the device under test 10, the sensor 111 on the vacuum pump 11 performs vacuum detection, and the first timer counts down according to the first preset time.
In the embodiment, the tested device comprises a pipeline, a condenser and a compressor, wherein the pipeline, the condenser and the compressor are communicated with each other and form a communication cavity. Wherein the step of controlling the vacuum pump to vacuumize the tested equipment comprises: and controlling a vacuum pump to vacuumize a communicating cavity communicated among the pipeline of the tested device, the condenser and the compressor.
Step S103: during the first timer countdown, the controller 12 determines whether the pressure value reaches the leakage pressure value.
It should be understood that, in this embodiment, the method for detecting vacuum degree and vacuum leakage based on the automatic evacuation system further includes: if the pressure value is determined not to reach the leakage pressure value, the controller 12 generates an alarm, determines that the tested device is unqualified, records the serial number and the test data of the tested device, uploads the serial number and the test data to the server, and meanwhile, the controller 12 controls the conveying mechanism to continuously drive the tested device to travel to a preset position along a preset track.
Step S104: and if the pressure value is determined to reach the leakage pressure value, the controller controls the tested device to be disconnected with the vacuum pump, the first timer is reset, and the second timer is utilized to count down according to second preset time.
It will be appreciated that the second timer will only count when the pressure value equals the leakage pressure value.
Step S105: during the second timer countdown, the controller 12 determines whether the pressure value remains within the leak pressure range value.
It should be understood that the value of the microleakage pressure range is slightly less than the value of the leak pressure.
It should be understood that, in this embodiment, the method for detecting vacuum degree and vacuum leakage based on the automatic evacuation system further includes: if the pressure value is determined not to be kept within the micro-leakage pressure range value, the controller 12 generates an alarm, determines that the device under test is unqualified, records the serial number and the test data of the device under test 10, uploads the serial number and the test data to the server, and meanwhile, the controller 12 controls the conveying mechanism to continue to drive the device under test 10 to the preset position along the preset track.
It should be understood that if the pressure value does not remain within the microleakage pressure range value, this indicates that a vacuum leak phenomenon exists, and thus the device under test 10 may prove to be unacceptable.
Step S106: if the pressure value is determined to be kept within the microleakage pressure range value, the controller 12 controls the tested device 10 to be connected with the vacuum pump 11 again after the countdown of the second timer is completed, controls the vacuum pump 11 to vacuumize the tested device 10 again, and utilizes a third timer to count down according to a third preset time.
Step S107: during the third timer countdown, the controller 12 determines whether the pressure value reaches the standard vacuum pressure value. It should be understood that the purpose of the third timer is to prevent the problem that cannot be detected during the first timer of the first stage and the second timer of the second stage, and to continue the evacuation after the third timer of the third stage again, so as to detect the problem that the super microleakage cracks gradually crack due to the large air pressure difference, wherein the microleakage caused by the super microleakage is easily detected during the continuous evacuation of the third stage, which effectively improves the detection accuracy.
It should be understood that, in this embodiment, the method for detecting vacuum degree and vacuum leakage based on the automatic evacuation system further includes: if the pressure value is determined not to reach the standard vacuum pressure value, the controller 12 generates an alarm, determines that the device under test 10 is unqualified, records the serial number and the test data of the device under test 10, uploads the serial number and the test data to the server, and simultaneously, the controller 12 controls the conveying mechanism to continuously drive the device under test 10 to the preset position along the preset track and controls the device under test 10 to be disconnected from the vacuum pump 11.
Step S108: if the pressure value is determined to reach the standard vacuum pressure value, the controller 12 judges that the tested device is qualified, controls the tested device 10 to be disconnected with the vacuum pump 11, records the serial number and the test data of the tested device 10, uploads the serial number and the test data to the server, and meanwhile, the controller 12 controls the transmission mechanism to continuously drive the tested device 10 to travel to the preset position along the preset track.
It should be understood that the predetermined position is a position convenient for the detection of the worker, for example, the predetermined track is an annular track, and the predetermined position is a starting point of the annular track, that is, the device under test 10 is driven to circulate for one circle along the predetermined track, so as to facilitate the work of the worker.
In this embodiment, the automatic evacuation system further includes an identifier for identifying an identification code on the device under test, wherein before the step of determining whether the device under test on the preset track is connected to the vacuum pump, the method further includes:
step A1: identifying the identification code of the tested equipment installed on the preset track by using the identifier;
step A2: and acquiring standard operation information corresponding to the identification code, wherein the standard operation information comprises a leakage pressure value, a micro-leakage pressure range value and a preset standard vacuum pressure value.
It should be understood that a display corresponding to the device under test is further disposed on the preset track, that is, a plurality of displays are disposed on the preset track, and the displays display the serial number and the test data of the device under test in real time, so that the worker can view the operation information of the device under test 10.
Further, the method for detecting the vacuum degree and the vacuum leakage based on the automatic evacuation system further comprises the following steps: and carrying out statistical analysis on each tested device and giving a histogram or a distribution graph. Wherein the histogram or profile includes the number of pass and fail of the device under test, the percentage of pass and fail of the device under test, the model of the device under test that passes and fails. It should be understood that the histogram or the distribution graph can be provided to facilitate the statistics of workers, and the work efficiency can be effectively improved.
In conclusion, the method for detecting the vacuum degree and the vacuum leakage based on the automatic evacuation system can be used for precisely detecting the vacuum degree, the vacuum leakage condition and the vacuum microleakage condition of the air conditioner, and greatly improves the detection accuracy and the performance of the air conditioner.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a detection method of vacuum degree and vacuum leakage based on automatic evacuation system, which characterized in that, this automatic evacuation system includes the preset track that is used for setting up equipment under test, drives equipment under test and follows this preset track mobile transport mechanism, is used for carrying out the vacuum pump of evacuation to equipment under test, is used for detecting the sensor of this equipment under test's vacuum degree and with this transport mechanism, this vacuum pump and the controller of this sensor connection, this method includes:
the controller judges whether the tested equipment on the preset track is connected with the vacuum pump;
if so, the controller controls the conveying mechanism to drive the tested equipment to move along the preset track, controls the vacuum pump to vacuumize the tested equipment, and utilizes the first timer to count down according to first preset time;
in the countdown of the first timer, the controller judges whether the pressure value reaches a leakage pressure value;
if the pressure value is determined to reach the leakage pressure value, the controller controls the tested equipment to be disconnected with the vacuum pump, the first timer is reset, and the second timer is utilized to count down according to second preset time;
in the countdown of the second timer, the controller judges whether the pressure value is kept within the micro-leakage pressure range value;
if the pressure value is determined to be kept within the micro-leakage pressure range value, after the countdown of the second timer is finished, the controller controls the tested equipment to be connected with the vacuum pump again, controls the vacuum pump to vacuumize the tested equipment again, and utilizes a third timer to count down according to third preset time;
in the countdown of the third timer, the controller judges whether the pressure value reaches a standard vacuum pressure value;
if the pressure value is determined to reach the standard vacuum pressure value, the controller judges that the tested equipment is qualified, controls the tested equipment to be disconnected with the vacuum pump, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to the preset position along the preset track.
2. The detection method according to claim 1, characterized in that the method further comprises:
and if the pressure value does not reach the leakage pressure value, the controller generates an alarm, judges that the tested equipment is unqualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to a preset position along the preset track.
3. The detection method according to claim 2, characterized in that the method further comprises:
and if the pressure value is determined not to be kept within the micro-leakage pressure range value, the controller generates an alarm, judges that the tested equipment is unqualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, and controls the conveying mechanism to continuously drive the tested equipment to travel to a preset position along the preset track.
4. The detection method according to claim 3, characterized in that the method further comprises:
and if the pressure value does not reach the standard vacuum pressure value, the controller generates an alarm, judges that the tested equipment is unqualified, records the serial number and the test data of the tested equipment, uploads the serial number and the test data to the server, controls the conveying mechanism to continuously drive the tested equipment to travel to a preset position along a preset track, and controls the tested equipment to be disconnected with the vacuum pump.
5. The inspection method of claim 4, wherein the automatic evacuation system further comprises an identifier for identifying an identification code on the device under test, and wherein the step of determining whether the device under test on the predetermined trajectory is connected to the vacuum pump further comprises:
identifying the identification code of the tested equipment installed on the preset track by using the identifier;
and acquiring standard operation information corresponding to the identification code, wherein the standard operation information comprises a leakage pressure value, a micro-leakage pressure range value and a preset standard vacuum pressure value.
6. The detection method according to claim 4, characterized in that the method further comprises:
and carrying out statistical analysis on each tested device and giving a histogram or a distribution graph, wherein the histogram or the distribution graph comprises the qualified and unqualified quantity of the tested device, the qualified and unqualified percentage of the tested device and the qualified and unqualified model of the tested device.
7. The detection method according to claim 6, wherein the device under test comprises a pipeline, a condenser and a compressor, wherein the pipeline, the condenser and the compressor are communicated with each other to form a communication cavity, and wherein the step of controlling the vacuum pump to vacuumize the device under test comprises the steps of:
and controlling a vacuum pump to vacuumize a communicating cavity communicated among the pipeline of the tested device, the condenser and the compressor.
8. The detection method according to claim 7, wherein the device under test is an air conditioner.
9. The inspection method according to claim 1, wherein the preset trajectory includes a straight trajectory and a circular trajectory.
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| CN201911049788.4A CN110726508A (en) | 2019-10-31 | 2019-10-31 | Vacuum degree and vacuum leakage detection method based on automatic evacuation system |
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| CN201911049788.4A CN110726508A (en) | 2019-10-31 | 2019-10-31 | Vacuum degree and vacuum leakage detection method based on automatic evacuation system |
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| CN111811759A (en) * | 2020-07-22 | 2020-10-23 | 海信（山东）冰箱有限公司 | Vacuum box detection device and detection method |
| CN114264429A (en) * | 2021-11-10 | 2022-04-01 | 深圳市矩阵多元科技有限公司 | Method and device for testing air leakage of vacuum system, electronic equipment and storage medium |
| CN114544105A (en) * | 2022-02-22 | 2022-05-27 | 佛山市美的清湖净水设备有限公司 | Vacuum detection equipment, film element detection method and device thereof, and storage medium |
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| CN111811759B (en) * | 2020-07-22 | 2023-01-10 | 海信冰箱有限公司 | Vacuum box detection device and detection method |
| CN114264429A (en) * | 2021-11-10 | 2022-04-01 | 深圳市矩阵多元科技有限公司 | Method and device for testing air leakage of vacuum system, electronic equipment and storage medium |
| CN114264429B (en) * | 2021-11-10 | 2024-04-19 | 深圳市矩阵多元科技有限公司 | Method and device for testing air leakage of vacuum system, electronic equipment and storage medium |
| CN114544105A (en) * | 2022-02-22 | 2022-05-27 | 佛山市美的清湖净水设备有限公司 | Vacuum detection equipment, film element detection method and device thereof, and storage medium |
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