KR20170004641A - Leak test apparatus for compressor and method - Google Patents

Leak test apparatus for compressor and method Download PDF

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Publication number
KR20170004641A
KR20170004641A KR1020150095271A KR20150095271A KR20170004641A KR 20170004641 A KR20170004641 A KR 20170004641A KR 1020150095271 A KR1020150095271 A KR 1020150095271A KR 20150095271 A KR20150095271 A KR 20150095271A KR 20170004641 A KR20170004641 A KR 20170004641A
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KR
South Korea
Prior art keywords
compressor
test
test object
water tank
pressure
Prior art date
Application number
KR1020150095271A
Other languages
Korean (ko)
Inventor
김종목
박철우
Original Assignee
김종목
(재)대구기계부품연구원
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Publication date
Application filed by 김종목, (재)대구기계부품연구원 filed Critical 김종목
Priority to KR1020150095271A priority Critical patent/KR20170004641A/en
Publication of KR20170004641A publication Critical patent/KR20170004641A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
    • 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

Abstract

The present invention relates to a leak testing apparatus and method for a compressor, and more particularly, to a leak testing apparatus and method for a compressor, which comprises a frame structure, a moving unit coupled to an upper portion of the frame structure and vertically moved up and down through a cylinder, And an adapter coupled to the test object compressor that is seated on the seat portion, wherein the adapter is connected to the test object compressor through a high pressure A test water tank which is installed at a lower portion of the seat portion and in which the seat portion is lowered and is seated on the seat portion so that the test subject compressor is immersed in water; A control unit for controlling the lowering operation and the gas supply of the gas supply unit, An inspection unit for descending the test target compressor into which the gas of a predetermined pressure is injected through the supply unit into the test water tank to detect a change in internal pressure of the test object compressor while the test object compressor is immersed in water, ; The control unit controls the controller to discharge the high-pressure gas into the test object compressor after determining the performance of the compressor to be tested in the inspection unit, and then lift the seat unit up and down in the water tank.
According to the present invention as described above, the pressure change inside the test object compressor is detected for a certain period of time through the pressure gauge, so that the minute leak can be accurately measured to accurately determine the performance of the compressor.
In addition, the control unit controls the compressor to be drawn out from the water tank after the gas is discharged from the water tank, so that the assembled parts of the compressor are automatically prevented from being injured by the operator due to the high pressure during decomposition and transportation, There is an effect that can be prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a leak test apparatus,

[0001] The present invention relates to a leak test apparatus and method for a compressor, and more particularly, to a leak test for checking the performance of a compressor in a water tank, visually confirming generation of bubbles, A leak test device of a compressor capable of detecting a change and testing the performance of the compressor more precisely and controlling the compressor to be drawn out to the outside of the water tank only when the gas is removed from the inside of the test object compressor, And methods.

The compressor of the automobile is applied to the automotive air conditioning system and performs the role of compressing the refrigerant made of low pressure gas into the high temperature and high pressure by the evaporator while being driven by the engine and transferring it to the condenser.

The above-mentioned compressor continues to operate to suck and compress the refrigerant through the suction hole by the reciprocating piston which receives the power of the engine, and then discharge the refrigerant through the discharge hole.

When the leakage phenomenon occurs outside the compressor that performs suction, discharge, and compression due to the characteristics of compressing the refrigerant, it is impossible to perform the compression operation of the refrigerant. Therefore, the leak test is performed before mounting the compressor in the assembled condition .

Conventionally, a constant pressure was applied to the compressor for the leak test, the compressor was put into the water, and the leak was visually measured through the bubble. However, this method is not only a very primitive method, but also makes it impossible to measure minute leaks which are difficult to be visually distinguished, resulting in problems such as degradation of product performance and shortening of life span, And the measurement takes a long time, resulting in a problem of deteriorating the productivity.

In addition, in order to perform a leak test, a high pressure is maintained inside the compressor, and a serious problem arises that parts assembled in the compressor due to such high pressure are accidentally spilled to the operator.

Therefore, it is possible to overcome the unreasonableness of such conventional leak test, to precisely measure even minute leaks, to prevent a safety accident in which the compressor components are separated from the compressor due to the high pressure, There is a growing demand for apparatuses and methods.

Korean Patent Publication No. 2000-4161

SUMMARY OF THE INVENTION It is an object of the present invention to provide a leak test apparatus capable of precisely measuring minute leaks.

It is another object of the present invention to provide a leak test method of a compressor which can prevent a safety accident from occurring due to a high pressure inside a test object compressor during a leak test process,

According to an aspect of the present invention, there is provided a frame structure, including: a frame structure; a moving unit coupled to an upper portion of the frame structure to vertically move up and down through a cylinder; And an adapter coupled to the test object compressor which is seated on the seat portion, wherein a high pressure gas is introduced into the test object compressor through the adapter, A test water tank which is installed at a lower portion of the seat portion and in which the seat portion is lowered to be seated on the seat portion so that the test object compressor is immersed in water; And a control unit for controlling the gas supply of the gas supply unit, A checking unit which is to lower the gas pressure of the injected test compressor into the test tank to sense the internal pressure change in said test subject compressor while the compressor under test is flooded determine the yangbul of compressor performance; The control unit controls the controller to discharge the high-pressure gas into the test object compressor after determining the performance of the compressor to be tested in the inspection unit, and then lift the seat unit up and down in the water tank.

The seat includes a top plate integrally coupled to a lower end of a cylinder of the moving unit, a column coupled to the lower portion of the upper plate in a longitudinal direction, a lower plate coupled to a lower end of the column, And a seating plate on which the compressor to be tested is mounted.

In addition, the water to be filled in the test water tank is composed of high temperature water at 20 to 40 ° C.

The leak test method of a compressor according to the present invention includes a compressor seating step of placing a compressor to be tested on a seat part and coupling a gas supply adapter to the compressor to be tested, An inflow step of lowering the seat part so that the test object compressor is submerged in water in the test water tank, an inflow step of lowering the seat part in the test water tank through a pressure gauge connected to the gas supply adapter, A gas discharging step of discharging the high-pressure gas supplied to the inside of the test object compressor, a step of raising and lowering the seat part to the outside of the test water tank, Withdraw to position System is provided, including a drying step for removing moisture adhering to the test compressor withdrawn from the test tank.

In this case, the drying step rotates the seating plate on which the test object compressor is seated by being rotatably coupled to the lower part of the seat part, and injects high-pressure air onto the surface of the test object compressor in a state in which the test object compressor is rotated To remove moisture.

According to the present invention as described above, the pressure change inside the test object compressor is detected for a certain period of time through the pressure gauge, so that the minute leak can be accurately measured to accurately determine the performance of the compressor.

In addition, the control unit controls the compressor to be drawn out from the water tank after the gas is discharged from the water tank, so that the assembled parts of the compressor are automatically prevented from being injured by the operator due to the high pressure during decomposition and transportation, There is an effect that can be prevented.

1 is a perspective view showing a leak test apparatus of a compressor according to the present invention.
2 is a front view of a leak test apparatus of a compressor according to the present invention.
3 is a flowchart showing a leak test procedure of a compressor according to the present invention.
FIG. 4 is a view showing a state in which a test object compressor is placed on a seating portion of a leak test apparatus of a compressor according to the present invention.
5 is a view showing a state in which the seat of the leak test apparatus of the compressor according to the present invention is lowered and the test object compressor is locked in the test water tank.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a leak test apparatus of a compressor according to the present invention, and FIG. 2 is a front view of a leak test apparatus of a compressor according to the present invention.

Referring to FIG. 1, a leak testing apparatus for a compressor according to the present invention includes a rectangular frame structure 10 on which components are installed, a moving unit 20 coupled to an upper portion of the frame structure 10, A gas supply part 40 for supplying gas to the test object compressor A which is seated on the seat part 30 and a gas supply part 40 which is disposed below the seat part 30, A test water tank 50, a control unit 60, and an inspection unit 70.

The frame structure 10 is formed of a rectangular frame-like structure frame as shown in the figure, and is provided as a frame in which various components are installed and supported inside the structure.

The moving part 20 is a post raised and lowered in the frame structure 10 by a pneumatic or hydraulic cylinder 21 and is coupled to and supported by an upper cover 11 provided on one side of the frame structure 10.

More specifically, the moving part 20 is coupled to the upper cover 11 of the frame structure 10 and operated up and down by pneumatic or hydraulic pressure, and the lower end of the moving part 20 is supported on the upper plate 31 of the seating part 30 And a guide post 22 which is coupled to the four corners of the upper plate 31 of the seating part 30 and whose one end is passed through the upper cover 11, So that the seat part (30) is vertically transferred by the guide post (22) coupled to the edge of the support plate when the cylinder (21) moves up and down.

 The seat portion 30 includes an upper plate 31 to which the cylinder 21 and the guide post 22 are coupled, a column 32 to be vertically coupled to both sides of the lower portion of the upper plate 31, A lower plate 33 coupled to a lower end of the lower plate 33 and a seating plate 34 hingedly coupled to an upper portion of the lower plate 33 to receive the compressor A to be tested. As described above, the seating portion 30 has a structure in which the upper and lower plates 31 and 33 are coupled to each other by the side column 32, and is rotatably installed inside So that the test subject compressor (A) can be rotated on the seating plate (34) by the seating plate (34). This is for uniformly spraying air on the surface of the compressor A while rotating the compressor A in the drying step of the leak test method to be described later.

The gas supply unit 40 is a unit for supplying or discharging a high pressure gas of a predetermined pressure for testing to the test object compressor A which is seated on the seat 30, So that a high pressure gas is supplied into the compressor A to be tested or an internal gas of the compressor A is discharged to the outside through the adapter 41. [ The gas supply is controlled by the controller 60. The controller 60 injects the gas through the gas supply unit 40 until the inside of the compressor under test A reaches a predetermined pressure, The gas supply is stopped and the airtightness of the compressor (A) to be tested is maintained.

The test water tank 50 is installed at a lower portion of the seat portion 30 and is filled with water so that the seat portion 30 is lowered and the test subject compressor A which is seated on the seat portion 30 is immersed in water. The test water tank 50 is provided with a water tank on the lower frame of the frame structure 10 and a discharge port (not shown) for discharging the water to be filled in the test water tank 50 is separately provided. Dispose of the discharged water to the outlet. The water to be filled in the test water tank 50 is heated by water in the water tank 50 by installing a hot wire coil (not shown) inside the water tank at a high temperature of about 20 to 40 ° C.

The control unit 60 controls the up and down movement of the moving unit 20 and the gas supply of the gas supply unit 40.

The inspection unit 70 descends the mounting part 30 into the test water tank 50 while the gas having the predetermined pressure is injected into the test object compressor A via the gas supply unit 40, The pressure of the compressor A is sensed and the compressor performance is judged. This pressure change can be inspected through a pressure gauge. The operator can visually check the change of the gauge manually, or it can be determined that the digital gauge automatically deviates from a predetermined value range.

The above test is performed in a state where the compressor A to be tested is locked in the water tank 50. If the pressure drops below a predetermined pressure for a predetermined time through the pressure gauge, The change of the pressure value due to the same failure can be confirmed by the leakage of the gas in a certain portion of the compressor (A) to be tested, and the accurate position of the gas leaking from the inside of the water tank through the bubble generating portion can be confirmed.

After the high pressure gas in the compressor A is discharged in a state in which the compressor A to be tested is locked in the test water tank 50 after the blowing state of the compressor performance is determined, And controls the control unit 60 to raise and lower it in the upper direction. This is because when the operator manually disassemble the parts from the compressor in order to remove the gas inside the compressor after the completion of the inspection, there is a high possibility that the parts are repelled by the pressure in the process of disassembling the parts, Is controlled to be transferred to the upper portion of the test water tank 50 after the pressure gas is automatically removed from the control unit 60.

Hereinafter, a leak test method of a compressor according to the present invention will be described in detail.

FIG. 3 is a flowchart showing a leak test procedure of a compressor according to the present invention, FIG. 4 is a view showing a state in which a test object compressor is placed on a seat of a leak test apparatus of a compressor according to the present invention, In which the seat of the leak test apparatus of the compressor is lowered and the test object compressor is locked in the test water tank.

Referring to the drawings, a method for testing a leak of a compressor according to the present invention includes a step S310 of loading a test target, a step S320 of supplying a gas, a step S330, an inspection step S340, a gas discharging step S350, A drawing step (S360), and a drying step (S370).

In the compressor seating step (S310), the compressor (A) to be tested is placed on the seating plate (34) of the seat (30) and the gas supply adapter (41) is bolted to the compressor (A) to be tested.

In the gas supply step S320, high-pressure gas is supplied into the test object compressor A through the gas supply adapter 41 so that the test object compressor A reaches a certain pressure. That is, the pressure inside the test object compressor A is detected through the pressure gauge, and the gas is supplied until a certain pressure is reached. When the pressure is reached, the gas supply is stopped and the airtightness is maintained.

In the infiltration step S330, the control unit 60 drives the moving unit 20 to lower the seating unit 30 so that the test subject compressor A reaching the predetermined pressure is submerged in the water in the test water tank 50.

In the infiltration step S330, the water in the test water tank 50 is heated to 20 to 40 ° C by the hot wire coil (not shown) in the test water tank 50.

In the inspecting step S340, a pressure change inside the test subject compressor A, which is immersed in water for a predetermined time, is detected through a pressure gauge connected to the gas supply adapter 41. The performance of the compressor is judged to be good when the pressure value of the pressure gauge does not fall below a predetermined reference value for a predetermined time, and the compressor performance is judged to be in a bad state when it falls below a predetermined reference value.

In the gas discharging step S350, the checking unit 70 determines whether the compressor is in a good condition, and then the gas inside the compressor A to be tested is discharged to the outside through the gas supply adapter 41 in the controller 60 .

In the withdrawing step S360, the internal gas of the compressor A to be tested is removed, and then the control unit 60 operates the conveying unit so that the seating unit 30 is conveyed upward in the water tub, As shown in FIG.

The drying step S370 is a step for removing the moisture adhering to the test object compressor A taken out of the test water tank 50. First, the gas supply adapter 41 is removed from the extruder A, . In order to efficiently dry in a short period of time, the seating plate 34 rotatably coupled to the lower portion of the seating portion 30 is rotated so that the test subject compressor A which is seated on the seating plate 34 is rotated And the high-pressure air from the outside is sprayed onto the surface of the test subject compressor (A) to be dried. In addition, the water on the surface of the compressor is composed of the hot water heated to 20 to 40 DEG C from above, and the moisture is removed more quickly by the high temperature.

As described above, according to the present invention, a leakage test is performed in a water tank, and when the pressure in the compressor is poor, the operator sees that the gas leaks at the point where the gas leaks visually from the compressor, The compressor 60 can be precisely measured up to the leak, and after the completion of the inspection in the control unit 60, the gas in the compressor is discharged in the water tank, and then the compressor is taken out. So that it is automatically controlled so as not to be injured by the operator.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims should include all such modifications and changes as fall within the scope of the present invention.

10: frame structure 11: upper cover
20: moving part 21: cylinder
22: Guide post
30: seat part 31: upper plate
32: Column 33: Lower plate
34: seat plate
40: gas supply unit 41: adapter
50: Test tank
60:
70: Inspector

Claims (5)

A frame structure;
A moving unit coupled to an upper portion of the frame structure and vertically moving up and down through a cylinder;
A mounting part coupled to a lower end of the moving part to integrally move up and down and having a space in which a test object compressor can be seated;
A gas supply unit including an adapter coupled to the test object compressor which is seated on the seat portion and supplying a high pressure gas to the inside of the test object compressor through the adapter to maintain a constant pressure;
A test water tank installed at a lower portion of the seating portion to lower the seating portion and to be placed on the seating portion so as to be submerged in water;
A control unit for controlling the movement of the moving unit and the gas supply of the gas supply unit;
The test target compressor into which the gas having the predetermined pressure is injected is lowered into the test water tank through the gas supply unit to detect a change in the internal pressure of the test object compressor while the test object compressor is immersed in water, An inspection unit; including,
Wherein the controller controls the controller to discharge the high-pressure gas into the test object compressor after determining the performance of the compressor to be tested in the inspection unit, and then lift the seat up to the upper portion in the water tank. Test device.
The method according to claim 1,
The seat
An upper plate integrally coupled to a lower end of the cylinder of the moving unit,
A column connected to the lower portion of the upper plate in the vertical direction,
A lower plate coupled to a lower end of the column,
And a seating plate rotatably coupled to an upper portion of the lower plate to seat the test object compressor.
The method according to claim 1,
Wherein the water to be filled in the test water tank is high temperature water of 20 to 40 占 폚.
A compressor seating step of placing a compressor to be tested on a seat and coupling a gas supply adapter to the compressor to be tested;
A gas supply step of supplying a high-pressure gas such that the inside of the test object compressor is maintained at a constant pressure through the gas supply adapter;
An infiltrating step of lowering the seat part so that the test object compressor is immersed in water in a test water tank;
An inspection step of detecting a change in internal pressure of the test object compressor for a predetermined time through a pressure gauge connected to the gas supply adapter to determine the performance of the compressor;
A gas discharging step of discharging high-pressure gas supplied into the test object compressor;
A step of raising and lowering the seat portion to the outside of the test water tank to place the test object compressor in its original position;
A drying step of removing moisture from the test object compressor taken out from the test water tank; And the leak test method of the compressor.
5. The method of claim 4,
The drying step
And a high pressure air is blown onto the surface of the test object compressor by rotating the seating plate on which the test object compressor is mounted by being rotatably coupled to the lower portion of the seat portion, And the leak test method of the compressor.
KR1020150095271A 2015-07-03 2015-07-03 Leak test apparatus for compressor and method KR20170004641A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107036767A (en) * 2017-03-28 2017-08-11 宁波市北仑德邦模具技术有限公司 The air tightness detection equipment of gas braking joint
KR20200083692A (en) * 2018-12-28 2020-07-09 주식회사 동희산업 System for testing leakage for high-voltage battery case of vehicle
CN114061845A (en) * 2021-11-17 2022-02-18 安徽省力天新材料股份有限公司 Laundry liquid bottle leakproofness sampling test equipment
KR102490459B1 (en) * 2022-07-11 2023-01-19 서흥전장(주) leakage tester
CN116448332A (en) * 2023-06-15 2023-07-18 山东明天机械集团股份有限公司 Airtight leakage detection device for vapor compressor and leakage detection method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000004161A (en) 1998-06-30 2000-01-25 전주범 Leak measuring method of hermetic electromotive compressor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000004161A (en) 1998-06-30 2000-01-25 전주범 Leak measuring method of hermetic electromotive compressor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107036767A (en) * 2017-03-28 2017-08-11 宁波市北仑德邦模具技术有限公司 The air tightness detection equipment of gas braking joint
KR20200083692A (en) * 2018-12-28 2020-07-09 주식회사 동희산업 System for testing leakage for high-voltage battery case of vehicle
CN114061845A (en) * 2021-11-17 2022-02-18 安徽省力天新材料股份有限公司 Laundry liquid bottle leakproofness sampling test equipment
CN114061845B (en) * 2021-11-17 2024-02-20 安徽省力天新材料股份有限公司 Sampling detection equipment for tightness of liquid detergent bottle
KR102490459B1 (en) * 2022-07-11 2023-01-19 서흥전장(주) leakage tester
CN116448332A (en) * 2023-06-15 2023-07-18 山东明天机械集团股份有限公司 Airtight leakage detection device for vapor compressor and leakage detection method thereof
CN116448332B (en) * 2023-06-15 2023-09-08 山东明天机械集团股份有限公司 Airtight leakage detection device for vapor compressor and leakage detection method thereof

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