TWI833424B - Detection apparatus for pressure leakage - Google Patents

Abstract

The present invention provides a detection apparatus for pressure leakage. The detection apparatus includes a standard chamber, a testing chamber, a first gas supply device, a second gas supply device, an intercommunicated device, and a differential pressure sensor. The standard chamber is configured for accommodating a standard object. The testing chamber is configured for accommodating a device under test (DUT). Each of the first gas supply device and the second gas supply device is connected to the standard chamber and the testing chamber, and the first gas supply device and the second gas supply device are configured to input gases having different temperatures and different pressures into the standard chamber and the testing chamber during different periods. The intercommunicated device is connected to the standard chamber, an interior space of the standard object, the testing chamber, and an interior space of the DUT. The differential pressure sensor is connected to the interior spaces of the standard object and the DUT for detecting a pressure difference there-between.

Description

Pressure leak detection equipment

The present invention relates to a detection device, in particular to a pressure leakage detection device.

Existing pressure leakage detection equipment tests the product under test by applying positive pressure or negative pressure, and uses the change in pressure difference to determine whether the product under test meets the required requirements. However, existing pressure leakage detection equipment does not take into account the testing environment where temperature requirements and pressure requirements coexist.

Therefore, the inventor believed that the above-mentioned defects could be improved, so he devoted himself to research and applied scientific principles, and finally proposed an invention that is reasonably designed and effectively improves the above-mentioned defects.

An embodiment of the present invention provides a pressure leakage detection device that can effectively improve the possible defects of existing pressure leakage detection equipment.

An embodiment of the present invention discloses a pressure leakage detection equipment, which includes: a standard chamber for setting a standard part; a test chamber for setting a component to be tested; a first air supply device connected The standard chamber and the test chamber are used to pass a first gas into the standard chamber and the test chamber, and the first gas has a first temperature value and a first pressure value. ; A second gas supply device, which connects the standard chamber and the test chamber, and is used to introduce a second gas to the standard chamber and the test chamber, and the second gas has a the second temperature value and a second Pressure value, the first temperature value is different from the second temperature value, the first pressure value is different from the second pressure value; an interconnection device connected to the standard chamber, the standard part An internal space, the test chamber, and an internal space of the component under test; and a differential pressure sensor that connects the internal space of the standard component and the component under test. The internal space is used to measure a pressure difference between the internal space of the standard part and the internal space of the part to be tested; wherein the first air supply device can pass through the intercommunication device The first gas is introduced into the standard chamber, the internal space of the standard part, the test chamber, and the internal space of the part to be tested, so that the standard chamber, The internal space of the standard part, the test chamber, and the internal space of the part to be tested have the first temperature value and the first pressure value; wherein, when the standard chamber , when the internal space of the standard part, the test chamber, and the internal space of the part to be tested have the first temperature value and the first pressure value, the second air supply The device passes the second gas into the standard chamber and the test chamber, so that the standard chamber and the test chamber have the second temperature value and the second pressure value; wherein , when the standard chamber and the test chamber have the second temperature value and the second pressure value, the differential pressure sensor measures the pressure difference.

To sum up, the pressure leakage detection equipment disclosed in the embodiment of the present invention belongs to nondestructive testing (NDT), and through the first air supply device, the second air supply device, and the The cooperation of the interconnection device simulates different environmental conditions with temperature requirements and pressure requirements, so that the component to be tested can perform pressure comparison tests with the standard component at different temperatures.

In order to further understand the characteristics and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, these descriptions and drawings are only used to illustrate the present invention and do not make any reference to the protection scope of the present invention. limit.

100: Pressure leak detection equipment

1: Standard chamber

2: Test chamber

3: First air supply device

31:First compressor

32:First dryer

33: The first air storage tank

34:Heater

4: Second air supply device

41:Second compressor

42: Second dryer

43:Second air storage tank

44:Condenser

5:Fifth control valve

6: Interoperability device

60: Control valve group

61: Second control valve

611: Connected location

612: Disconnect position

62:Third control valve

621:Exhaust position

622: Disconnect position

623: Connected location

63:Fourth control valve

631: Connected location

632: Disconnect position

64:Temperature detector

65: Pressure detector

7: First control valve

8: Differential pressure sensor

S: standard parts

S0: internal space

S1: body

S11: Open hole

S2:Sealing cover

S3: Air intake joint

S4: Pressure measuring joint

S5:Sealant layer

T: piece to be tested

T0: internal space

T1: Ontology

T11: opening

T2:Sealing cover

T3: Air intake joint

T4: pressure measuring joint

T5: Washer

G1: first gas

G2: second gas

S110~S140: steps

FIG. 1 is a schematic diagram of step S110 during operation of the pressure leakage detection device according to the embodiment of the present invention.

Figure 2 is an enlarged schematic diagram of the standard chamber, standard parts, test chamber, and parts to be tested in Figure 1.

FIG. 3 is an enlarged schematic diagram of the first air supply device and the second air supply device of FIG. 1 .

FIG. 4 is an enlarged schematic diagram of the interworking device of FIG. 1 .

FIG. 5 is a schematic diagram (1) of step S120 during operation of the pressure leakage detection device according to the embodiment of the present invention.

FIG. 6 is a schematic diagram (2) of step S120 during operation of the pressure leakage detection device according to the embodiment of the present invention.

FIG. 7 is a schematic diagram (1) of step S130 during operation of the pressure leakage detection device according to the embodiment of the present invention.

FIG. 8 is a schematic diagram (2) of step S130 during operation of the pressure leakage detection device according to the embodiment of the present invention.

FIG. 9 is a schematic diagram of step S140 of the pressure leakage detection device in operation according to the embodiment of the present invention.

The following is a description of the implementation of the "pressure leakage detection equipment" disclosed in the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not based on Actual size depictions, stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the present invention.

It should be understood that although terms such as “first”, “second” and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another component or one signal from another signal. In addition, the term "or" used in this article shall include any one or combination of more of the associated listed items depending on the actual situation.

Please refer to FIG. 1 to FIG. 9 , which is an embodiment of the present invention. As shown in Figures 1 to 4, this embodiment discloses a pressure leakage detection device 100, which can be used to simulate different environmental conditions with temperature requirements and pressure requirements, so that a piece to be tested T can be compared with a standard piece S Carry out pressure comparison testing and effectively reduce the testing time required for the test piece T.

Furthermore, the piece to be tested T includes at least one body T1 (two bodies are used for illustration in this embodiment), a sealing cover T2, an air inlet joint T3, and a pressure measuring joint T4. Two of the bodies T1 are assembled together to form an internal space T0, and one of the bodies T1 has an opening T11 connected to the internal space T0. Furthermore, the sealing cover T2 closes the opening T11, and the air inlet joint T3 and the pressure measuring joint T4 are installed on the sealing cover T2 and communicate with the internal space T0, so that The internal space T0 can be connected to the outside through the air inlet joint T3 and the pressure measuring joint T4.

Furthermore, the internal space S0 of the standard part S has a volume equal to the internal space T0, and the standard part S is preferably formed with a substantially similar structure to the part to be tested T, so as to reduce variables. of production. That is to say, in this embodiment, the standard part S also includes at least one body S1 (eg, two), a sealing cover S2, an air inlet joint S3, and a pressure measuring joint S4. The two bodies S1 are assembled with each other to surround the internal space S0, and one of the bodies S1 and T1 has an opening S11 connected to the internal space S0. Furthermore, the sealing cover plate S2 closes the opening S11, and the air inlet joint S3 and the pressure measuring joint S4 are installed on the sealing cover S2 and connected to the internal space S0, so that the internal space S0 can pass through The air inlet joint S3 and the pressure measuring joint S4 are connected to the outside.

Furthermore, the standard part S can only have the following structural difference with the part to be tested T in this embodiment: the standard part S has a seal that seals the junction of its two bodies S1. The glue layer S5 enables the internal space S0 of the standard part S to be completely isolated from the external environment; the part to be tested T has a gasket T5 clamped between its two bodies T1. The degree of isolation between the internal space T0 and the external environment is affected by the gasket T5. That is to say, under the different environmental conditions simulated by the pressure leakage detection device 100, the sealing degree that the gasket T5 can achieve is the target of the test in this embodiment.

In this embodiment, the pressure leak detection equipment 100 includes a standard chamber 1, a test chamber 2, a first air supply device 3, a second air supply device 4, two fifth control valves 5, and a Intercommunication device 6, a first control valve 7, and a differential pressure sensor 8, but the invention is not limited thereto. For example, in other embodiments not shown in the present invention, the fifth control valve 5 and the first control valve 7 may be omitted or replaced with other components according to design requirements.

The standard chamber 1 is used for setting the standard part S, and the standard part S can pass through the sealant layer S5 so that the gas in the standard chamber 1 will not leak to the standard part. The internal space S0 of S; that is to say, the internal space S0 of the standard part S is completely sealed, and its pressure value is independent of the pressure value of the standard chamber 1 (that is, there is no linkage relation).

Furthermore, the test chamber 2 is used for the device under test T to be placed, and the test chamber 2 and the internal space T0 of the device under test T are only connected to each other by the gasket T5 Isolation, therefore the sealing degree of the gasket T5 will determine whether the pressure value of the test chamber 2 and the pressure value of the internal space T0 of the object under test T will affect each other. In addition, the standard chamber 1 and the test chamber 2 use the same internal volume in this embodiment, and both have the functions of heat insulation and high pressure. able.

The first gas supply device 3 connects the standard chamber 1 and the test chamber 2 for introducing a first gas G1 to the standard chamber 1 and the test chamber 2, and the The first gas G1 has a first temperature (eg, 52 degrees Celsius) and a first pressure value (eg, 15.93 psi). In this embodiment, the first air supply device 3 includes a first compressor 31 , a first dryer 32 connected to the first compressor 31 , and a first dryer 32 connected to the first dryer 32 . The first air storage tank 33 and a heater 34 connected to the first air storage tank 33 .

Furthermore, the first compressor 31 is used to extract gas from the external environment and pressurize it (for example: the gas temperature of the external environment is 25 degrees Celsius and the pressure is 14.7 psi); for example, the first compressor 31 is used to compress the air and convert it into compressed air, so that the compressed air has the first pressure value. The first dryer 32 can be used to filter the moisture of the gas extracted by the first compressor 31 (for example, reduce the humidity of the compressed air to below 35%). The first air storage tank 33 It is used to store the gas after the moisture has been filtered by the first dryer 32 and has the first pressure value, and the heater 34 is used to output the gas from the first gas supply device 3 to The first gas G1 in the standard chamber 1 and the test chamber 2 is maintained at the first temperature value.

Furthermore, the second gas supply device 4 connects the standard chamber 1 and the test chamber 2 for introducing a second gas G2 to the standard chamber 1 and the test chamber 2 . Wherein, the second gas G2 has a second temperature value (such as 25 degrees Celsius) and a second pressure value (such as 17.35 psi), and the first temperature value is higher than the second temperature value, so The first pressure value is lower than the second pressure value. In this embodiment, the second air supply device 4 includes a second compressor 41 , a second dryer 42 connected to the second compressor 41 , and a second dryer 42 connected to the second air supply device 4 . a second air storage tank 43, and a condenser 44 connected to the second air storage tank 43.

Furthermore, the second compressor 41 is used to extract gas from the external environment and pressurize it (for example: the gas temperature of the external environment is 25 degrees Celsius and the pressure is 14.7 psi); for example, The second compressor 41 is used to compress air and convert it into compressed air, so that the compressed air has the second pressure value. The second dryer 42 can be used to filter the moisture of the gas extracted by the second compressor 41 (for example, reduce the humidity of the compressed air to below 35%). The second air storage tank 43 It is used to store the gas that has been filtered by the second dryer 42 and has the second pressure value, and the condenser 44 is used to output the gas from the second air supply device 4 to The second gas G2 in the standard chamber 1 and the test chamber 2 is maintained at the second temperature value.

It should be noted that both the heater 34 and the condenser 44 can be called a temperature controller in this embodiment. Furthermore, compared with the gas transportation and switching method between the standard chamber 1 and the test chamber 2 and the first gas supply device 3 and the second gas supply device 4 in this embodiment, It is realized by two fifth control valves 5, but the present invention is not limited thereto. Furthermore, the standard chamber 1 and the test chamber 2 are each connected to one of the fifth control valves 5, and the first air supply device 3 and the second air supply device 4 are respectively connected. to the two fifth control valves 5, so that the standard chamber 1 and the test chamber 2 can each communicate with the first gas supply device 3 or The second air supply device 4 is connected or disconnected.

The interconnection device 6 is connected to the standard chamber 1, the internal space S0 of the standard part S, the test chamber 2, and the internal space T0 of the part under test T. In this embodiment, the intercommunication device 6 is connected to the air inlet joint S3 of the standard component S to communicate with the internal space S0, and the intercommunication device 6 is connected to the component under test T. The air inlet joint T3 is connected with the internal space T0.

The pressure leakage detection device 100 further includes a temperature detector 64 and a pressure detector 65 . The temperature detector 64 can be used to detect the temperature values of the standard chamber 1 and the test chamber 2 , and the pressure detector 65 can be used to detect the standard chamber 1 and the pressure value of the test chamber 2.

The interoperability device 6 includes a second control unit that is connected in sequence and used in conjunction with each other. valve 61, a third control valve 62 and a fourth control valve 63. Furthermore, the second control valve 61 has a connecting position 611 and a disconnecting position 612. As shown in Figure 1, when the second control valve 61 is located at the communication position 611, the standard chamber 1 and the test chamber 2 are connected to each other; as shown in Figure 9, when the second control valve 61 is located at the communication position 611, When the two control valves 61 are in the disconnected position 612, the standard chamber 1 and the test chamber 2 are isolated from each other.

Furthermore, the third control valve 62 has an exhaust position 621 , a disconnection position 622 , and a communication position 623 . Wherein, as shown in Figure 1, when the third control valve 62 is in the exhaust position 621, the third control valve 62 can be used to connect the space or chamber connected thereto to the external environment; as shown in Figure 9, when the third control valve 62 is in the disconnected position 622, the spaces or chambers respectively connected to the second control valve 61 and the fourth control valve 63 are isolated from each other; Figure 5 As shown, when the third control valve 62 is in the communication position 623, the spaces or chambers respectively connected to the second control valve 61 and the fourth control valve 63 are connected to each other.

It should be noted that the second control valve 61 and the third control valve 62 can be collectively referred to as a control valve group 60 in this embodiment, and the interconnection device 6 can be switched by its components ( For example: the second control valve 61 is located at the communication position 611 and the third control valve 62 is at the exhaust position 621), so that the third control valve 62 is connected to the standard chamber 1 and the test chamber 2, for exhausting the standard chamber 1 and the test chamber 2.

In addition, the fourth control valve 63 has a connecting position 631 and a disconnecting position 632 . Wherein, as shown in Figure 1, when the fourth control valve 63 is located at the communication position 631, the internal space S0 and the internal space T0 are connected to each other; as shown in Figure 9, when the fourth control valve 63 is located at the communication position 631, When the valve 63 is in the off position 632, the internal space S0 and the internal space T0 are isolated from each other.

That is to say, the intercommunication device 6 can be switched through its components (for example: the second control valve 61 is in the communication position 611, the third control valve 62 is in the communication position 623, and the third control valve 62 is in the communication position 623, The fourth control valve 63 is located at the communication position 631), so that the fourth control valve 63 connects all The internal space S0 of the standard part S and the internal space T0 of the part to be tested T are used to control the fourth control valve 63 through the third control valve 62 and the second control valve 61 . The first gas G1 flows into the internal space S0 and the internal space T0.

The differential pressure sensor 8 is connected to the internal space S0 of the standard component S and the internal space T0 of the component under test T, and is used to measure the internal space S0 and the internal space T0. a pressure difference between them. Furthermore, the first control valve 7 is connected to the external environment, and is connected to the internal space S0 of the standard part S and the internal space T0 of the part to be tested T, for connecting the internal space S0 and The internal space T0 is exhausted.

In this embodiment, one end of the differential pressure sensor 8 and the first control valve 7 is connected to the pressure measuring joint T4 of the device under test T, and the differential pressure sensor 8 and The other end of the first control valve 7 is connected to the pressure measuring joint S4 of the standard component S. Accordingly, as shown in FIG. 1 , when the first control valve 7 is opened, the internal space S0 and the internal space T0 can be exhausted toward the external environment through the first control valve 7 . As shown in Figure 9, when the first control valve 7 is closed, the internal space S0 and the internal space T0 cannot be exhausted to the outside, so that the differential pressure sensor 8 can detect the pressure difference. Measurement of value.

To sum up, the above is the structural description of the pressure leakage detection device 100 in this embodiment. Next, one of the possible operating methods of the pressure leakage detection device 100 will be introduced, which sequentially includes step S110 to step S110 . S140, but the present invention is not limited to this. It should be noted that any numerical value in this embodiment is only for convenience of explanation. Therefore, in actual application, these numerical values can be adjusted and changed according to requirements.

Step S110: As shown in Figure 1, it is the initial configuration state of the pressure leakage detection device 100. Wherein, the standard chamber 1 and the test chamber 2 are each disconnected from the first air supply device 3 and the second air supply device 4 by the corresponding fifth control valve 5 in the communication device 6, the second control valve 61 is located at the communication position 611 and the third control valve 62 is in the exhaust position 621 so that the standard chamber 1 and the test chamber 2 are connected to the external environment; the first control valve 7 is opened and the fourth control valve 63 is in the communication position 631, so that the internal space S0 and the internal space T0 can be connected to the external environment.

Step S120: As shown in Figure 5, the standard chamber 1 and the test chamber 2 are each switched by the corresponding fifth control valve 5 to only communicate with the first air supply device 3, so that The first gas supply device 3 can pass the first gas G1 to the standard chamber 1 and the test chamber 2 .

Furthermore, the second control valve 61 is located at the communication position 611, the third control valve 62 is at the communication position 623, and the fourth control valve 63 is located at the communication position 631, and the third control valve 62 is located at the communication position 623. A control valve 7 is opened, so that the first gas G1 can pass into the internal space S0 and the internal space T0 through the standard chamber 1 and the test chamber 2, and allow it to exist in the The gas inside the pressure leakage detection device 100 in the initial configuration state will be discharged to the external environment through the first control valve 7 .

Then, as shown in Figure 6, when the temperature detector 64 detects that the standard chamber 1 and the test chamber 2 have the first temperature value, the first control valve 7 is closed, So that the standard chamber 1, the internal space S0, the test chamber 2, and the internal space T0 can be isolated from the external environment, so that they are only filled with the first gas G1 and have the third gas G1. a temperature value and the first pressure value.

That is to say, the first air supply device 3 can supply the standard chamber 1, the internal space S0 of the standard part S, the test chamber 2, and the The first gas G1 is introduced into the internal space T0 of the part to be tested T, so that the standard chamber 1, the internal space S0 of the standard part S, the test chamber 2, and the The internal space T0 of the object under test T has the first temperature value and the first pressure value.

In step S120 of this embodiment, the standard chamber 1, the internal space S0 of the standard component S, the test chamber 2, and the internal space T0 of the component to be tested T are since one The initial temperature value (such as: 25 degrees Celsius) increases to the first temperature value (such as: 52 degrees Celsius), and rises from an initial pressure value (such as: 14.73 psi) to the first pressure value (such as: 15.93 psi) ).

Step S130: As shown in Figure 7, the standard chamber 1 and the test chamber 2 are each switched by the corresponding fifth control valve 5 to only communicate with the second air supply device 4, so that The second gas supply device 4 can pass the second gas G2 into the standard chamber 1 and the test chamber 2 . Furthermore, the second control valve 61 is located at the communication position 611, the third control valve 62 is at the exhaust position 621, and the fourth control valve 63 is located at the communication position 631, and the The first control valve 7 is closed so that the first gas G1 in the standard chamber 1 and the test chamber 2 can be discharged to the external environment, and the internal space S0 and the internal space T0 The first gas G1 is retained inside.

Then, as shown in FIG. 8 , when the temperature detector 64 detects that the standard chamber 1 and the test chamber 2 have the second temperature value, the third control valve 62 switches to the The disconnection position 622 is reached, and the second gas supply device 4 continues to pass the second gas G2 into the standard chamber 1 and the test chamber 2 until the standard chamber 1 and the test chamber 2 are connected to each other. Chamber 2 has said second pressure value.

That is to say, when the standard chamber 1, the internal space S0 of the standard component S, the test chamber 2, and the internal space T0 of the component under test T have the first temperature When the value is equal to the first pressure value, the second gas supply device 4 supplies the second gas G2 to the standard chamber 1 and the test chamber 2, so that the standard chamber 1 and the test chamber 2 The test chamber 2 has the second temperature value and the second pressure value.

In step S130 of this embodiment, the standard chamber 1 and the test chamber 2 decrease from the first temperature value (such as 52 degrees Celsius) to the second temperature value (such as 25 degrees Celsius). ), and rises from the first pressure value (such as: 15.93psi) to the second pressure value (such as: 17.35psi); the internal space S0 and the internal space T0 are connected with each other and are filled with the The first gas G1 should be maintained at the first temperature value (for example: 52 degrees Celsius) and the first pressure value (for example: 15.93 psi).

Step S140: As shown in Figure 9, the standard chamber 1 and the test chamber 2 are each disconnected from the first air supply device 3 and the third gas supply device 3 by the corresponding fifth control valve 5. The communication between the two air supply devices 4. Furthermore, the second control valve 61 is located at the off position 612, the third control valve 62 is at the off position 622, and the fourth control valve 63 is at the off position 632, and The first control valve 7 is closed, so that the standard chamber 1, the internal space S0, the test chamber 2, and the internal space T0 are independent and not connected to each other, and then through the difference The pressure sensor 8 measures the pressure difference between the internal space S0 and the internal space T0.

That is to say, when the standard chamber 1 and the test chamber 2 have the second temperature value and the second pressure value, the differential pressure sensor 8 measures the pressure difference. The closer the pressure difference measured by the differential pressure sensor 8 approaches zero, the greater the isolation effect between the internal space T0 of the object under test T and the test chamber 2 . The better, this means that the degree of pressure leakage of the piece under test T is lower.

[Technical effects of the embodiments of the present invention]

To sum up, the pressure leakage detection equipment disclosed in the embodiment of the present invention belongs to nondestructive testing (NDT), and through the first air supply device, the second air supply device, and the The cooperation of the interconnection device simulates different environmental conditions with temperature requirements and pressure requirements, so that the component under test can be tested for pressure comparison with the standard component, and the testing required for the component under test can be effectively reduced. time.

The contents disclosed above are only preferred and feasible embodiments of the present invention, and do not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the patent scope of the present invention. within.

100: Pressure leak detection equipment

1: Standard chamber

2: Test chamber

3: First air supply device

4: Second air supply device

5:Fifth control valve

6: Interoperability device

60: Control valve group

61: Second control valve

611: Connected location

612: Disconnect position

62:Third control valve

621:Exhaust position

622: Disconnect position

623: Connected location

63:Fourth control valve

631: Connected location

632: Disconnect position

64: Temperature detector

65: Pressure detector

7: First control valve

8: Differential pressure sensor

S: standard parts

S0: internal space

T: piece to be tested

T0: internal space

G1: first gas

G2: second gas

S110: Steps

Claims (11)

A pressure leak detection equipment, which includes: a standard chamber for setting a standard part; a test chamber for setting a component to be tested; a first air supply device connected to the standard chamber And the test chamber is used to pass a first gas into the standard chamber and the test chamber, the first gas has a first temperature value and a first pressure value; a second supply gas device, which connects the standard chamber and the test chamber, and is used to pass a second gas to the standard chamber and the test chamber, the second gas has a second temperature value and a second pressure value, the first temperature value is different from the second temperature value, the first pressure value is different from the second pressure value; an interconnection device connected to the standard chamber, all An internal space of the standard part, the test chamber, and an internal space of the part under test; and a differential pressure sensor connecting the internal space of the standard part and the part under test The internal space is used to measure a pressure difference between the internal space of the standard part and the internal space of the part to be tested; wherein the first air supply device can pass through The intercommunication device supplies the first gas to the standard chamber, the internal space of the standard part, the test chamber, and the internal space of the part to be tested, so that the standard The chamber, the internal space of the standard part, the test chamber, and the internal space of the part to be tested have the first temperature value and the first pressure value; wherein, when the When the standard chamber, the internal space of the standard part, the test chamber, and the internal space of the part to be tested have the first temperature value and the first pressure value, the third Two gas supply devices pass the second gas into the standard chamber and the test chamber, so that the standard chamber The chamber and the test chamber have the second temperature value and the second pressure value; wherein, when the standard chamber and the test chamber have the second temperature value and the second pressure value When, the differential pressure sensor measures the pressure difference. The pressure leakage detection device according to claim 1, wherein the pressure leakage detection device includes a first control valve, and the first control valve connects the internal space of the standard part and the part to be tested. The internal space; wherein, when the first control valve is opened, the internal space of the standard part and the internal space of the part to be tested can be exhausted through the first control valve. The pressure leak detection equipment according to claim 1, wherein the communication device includes a second control valve, the second control valve connects the standard chamber and the test chamber to connect or disconnect the standard chamber and the test chamber. The pressure leak detection equipment of claim 3, wherein the communication device includes a third control valve, and the third control valve is connected to the standard chamber and the test through the second control valve. Chamber; when the second control valve is in the communication position and the third control valve is in the exhaust position, the standard chamber and the test chamber can be exhausted through the third control valve. The pressure leakage detection device of claim 4, wherein the communication device includes a fourth control valve, and the fourth control valve is connected to the standard through the second control valve and the third control valve. chamber and the test chamber; when the second control valve, the third control valve, and the fourth control valve all When in the communication position, the fourth control valve can pass the first gas into the internal space of the standard part and the to-be-received component through the second control valve and the third control valve. The internal space of the test piece. The pressure leakage detection device of claim 1, wherein the pressure leakage detection device further includes a temperature detector and a pressure detector, and the temperature detector is used to detect the difference between the standard chamber and the The temperature value of the test chamber, the pressure detector is used to detect the pressure values of the standard chamber and the test chamber. The pressure leakage detection device according to claim 1, wherein the pressure leakage detection device further includes two fifth control valves, and the first air supply device is connected to the first air supply device through the two fifth control valves respectively. The standard chamber and the test chamber, the second air supply device connects the standard chamber and the test chamber respectively through two fifth control valves, and the two fifth control valves are used to Connect or disconnect the first gas and the second gas. The pressure leak detection equipment of claim 1, wherein the first air supply device or the second air supply device includes: a compressor for compressing air and converting it into compressed air, so that The compressed air has the first pressure value or the second pressure value; a dryer connected to the compressor to dry the compressed air; an air storage tank connected to the dryer a machine to store the compressed air; and a temperature controller connected to the air storage tank to control the compressed air at the first temperature value or the second temperature value to produce the desired the first gas or the second gas. The pressure leakage detection device according to claim 1, wherein when the first supply When the gas device passes the first gas into the standard chamber, the internal space of the standard part, the test chamber, and the internal space of the part to be tested through the communication device , causing the standard chamber, the internal space of the standard component, the test chamber, and the internal space of the component to be tested to rise from an initial temperature value to the first temperature value, and by An initial pressure value rises to the first pressure value. The pressure leakage detection device according to claim 1, wherein the object to be tested includes: a body forming the internal space, and the body has an opening connected to the internal space; a sealing cover A plate that closes the opening; an air inlet joint installed on the sealing cover plate, and the air inlet joint connects the internal space and the interconnection device, and the first gas passes through the air inlet The joint enters the internal space; and a pressure measuring joint is installed on the sealing cover, and the pressure measuring joint connects the internal space and the differential pressure sensor, and the differential pressure sensor passes The pressure measuring joint is used to measure the pressure difference. The pressure leakage detection device of claim 1, wherein the first temperature value is higher than the second temperature value, and the first pressure value is lower than the second pressure value.

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