Rapid exhaust system and test system

Abstract

The invention discloses a rapid exhaust system and a test system, and the system comprises an exhaust valve which is used for communicating with a vehicle refrigerant pipeline; the vacuum exhaust part comprises a vacuum exhaust outlet valve, a vacuum exhaust tank and a vacuum exhaust inlet valve; a vacuum pump in communication with the vacuum exhaust inlet valve; the pressure sensor is used for detecting the pressure value of gas in a vehicle refrigerant pipeline, and the rapid exhaust system is switched between a first state and a second state according to the pressure value; in the first state, the air pressure value in the vehicle refrigerant pipeline is a first pressure value or a second pressure value, the vehicle refrigerant pipeline and the exhaust valve are communicated with the outside atmosphere, the vacuum exhaust outlet valve is closed, and the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are communicated; and in the second state, the air pressure value in the vehicle refrigerant pipeline is a third pressure value, and the vehicle refrigerant pipeline, the vacuum exhaust outlet valve and the vacuum exhaust tank are communicated. According to the invention, gas in the refrigerant pipeline of the vehicle can be quickly and efficiently emptied.

Description

Technical Field

[0001] The invention relates to the field of vehicle air conditioning systems, and in particular to a quick exhaust system and a test system. Background Art

[0002] The refrigerant filling amount of traditional fuel vehicles is in the range of 500g-600g, and the maximum filling amount is about 800g. The vehicle pipelines of such vehicles are less curved, the refrigerant filling volume is not large, and in the past, the production rhythm of automobile factories was relatively slow. Under such conditions, the traditional refrigerant positive pressure test (testing the sealing performance of the pipeline) can fully meet the production requirements. During the refrigerant positive pressure test, there will be no line stop due to insufficient refrigerant positive pressure test cycle time, thereby ensuring production efficiency and not having a negative impact on vehicle quality.

[0003] However, in recent years, new energy electric vehicles have shown a booming trend. Along with this, the amount of refrigerant added to new energy vehicles continues to increase, and its pipelines have become more complex, with significantly more bends, which further increases the volume of the refrigerant circulation loop. Due to the increase in the volume of the refrigerant circulation loop and the increase in the number of pipelines, the time required to pressurize and exhaust the system during the positive pressure test process has also increased significantly. As a result, under the dual pressure of a limited number of workstations and a high production cycle, the refrigerant positive pressure test equipment designed according to the traditional design has exposed serious problems. The test cycle time is too long, resulting in frequent line stops, which has had a very serious impact on the production activities of customers and can no longer meet the production needs of customers. Therefore, there is an urgent need to optimize the equipment design so that the gas in the vehicle refrigerant pipeline can be quickly and efficiently emptied, which can greatly shorten the cycle time, thereby meeting the production needs of customers and ensuring that the quality of the vehicle is not affected. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the conventional refrigerant positive pressure test equipment requires a long exhaust time and cannot meet the production rhythm of new energy electric vehicles. The present invention provides a rapid exhaust system and a test system that can quickly and efficiently exhaust the gas in the vehicle refrigerant pipeline.

[0005] In order to solve the above technical problems, an embodiment of the present invention discloses a quick exhaust system, which comprises:

[0006] An exhaust valve, the exhaust valve is used to communicate with an external vehicle refrigerant pipeline;

[0007] A vacuum exhaust section, the vacuum exhaust section comprising a vacuum exhaust outlet valve, a vacuum exhaust tank and a vacuum exhaust inlet valve which are connected in sequence;

[0008] A vacuum pump, wherein the vacuum exhaust inlet valve is connected to the vacuum pump;

[0009] A pressure sensor, the pressure sensor is connected to the exhaust valve and the vacuum exhaust outlet valve, the pressure sensor is used to detect the pressure value of the gas in the external vehicle refrigerant pipeline, and the quick exhaust system switches between the first state and the second state according to the pressure value, wherein;

[0010] In the first state, the air pressure value in the external vehicle refrigerant pipeline is the first pressure value or the second pressure value, the external vehicle refrigerant pipeline, the exhaust valve and the external atmosphere are connected in sequence, the vacuum exhaust outlet valve is closed, the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are connected in sequence, or the vacuum exhaust inlet valve is also closed;

[0011] In the second state, the air pressure value in the external vehicle refrigerant pipeline is a third pressure value, the first pressure value is greater than the third pressure value, the third pressure value is greater than the second pressure value, the exhaust valve and the vacuum exhaust inlet valve are closed, and the external vehicle refrigerant pipeline, the vacuum exhaust outlet valve and the vacuum exhaust tank are connected in sequence.

[0012] With the above technical solution, when the vehicle refrigerant pipeline is subjected to a positive pressure test, a gas (such as nitrogen) of a certain pressure will be filled into the vehicle refrigerant pipeline to test the sealing of the vehicle refrigerant pipeline under a high pressure environment. At this time, the air pressure value in the vehicle refrigerant pipeline (the air pressure value refers to the pressure difference between the air pressure in the vehicle refrigerant pipeline and the ambient air pressure or the standard atmospheric pressure) is a first pressure value (such as 13 bar). After the positive pressure test is completed, the nitrogen in the vehicle refrigerant pipeline needs to be emptied. At this time, the exhaust valve is opened. Since the air pressure value in the vehicle refrigerant pipeline is 13 bar at this time, which is much greater than the air pressure value of the outside atmosphere, the nitrogen in the vehicle refrigerant pipeline begins to be naturally discharged to the outside atmosphere through the exhaust valve under the action of the air pressure difference. At the same time, the vacuum exhaust outlet valve is closed, the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are connected in sequence, and the vacuum pump works to keep the vacuum exhaust tank in a vacuum state, preparing for the subsequent suction of the remaining nitrogen in the vehicle refrigerant pipeline.

[0013] In some possible embodiments, after the vacuum exhaust tank reaches a certain vacuum degree (for example, the vacuum degree is approximately 2 mbar or 3 mbar), the vacuum exhaust inlet valve can be closed to stop the vacuum pump, and the vacuum degree of the vacuum exhaust tank can be maintained by closing the vacuum exhaust outlet valve and the vacuum exhaust inlet valve.

[0014] As the nitrogen is continuously discharged, the air pressure in the vehicle refrigerant pipeline gradually decreases. When the pressure sensor detects that the air pressure value in the vehicle refrigerant pipeline drops to the third pressure value (for example, 3 bar), the discharge speed of the nitrogen slows down significantly. This is because as the air pressure decreases, the power of nitrogen discharged from the vehicle refrigerant pipeline gradually decreases, the pressure difference between the inside and outside becomes smaller, and the flow of nitrogen becomes less smooth.

[0015] At this time, switch the quick exhaust system to the second state, close the exhaust valve, then open the vacuum exhaust outlet valve, and close the vacuum exhaust inlet valve. Since the vacuum exhaust tank is in a vacuum state, its internal air pressure is much lower than the air pressure in the vehicle refrigerant pipeline at this time. Under the effect of this huge air pressure difference, the vacuum exhaust tank is like a powerful "suction pump" that can rely on its own vacuum environment to accelerate the absorption of the remaining nitrogen in the vehicle refrigerant pipeline. This exhaust method using the vacuum principle is much more efficient than relying solely on natural exhaust.

[0016] As the vacuum exhaust tank continues to work, the air pressure in the vehicle refrigerant pipeline will continue to drop. When the air pressure in the vehicle refrigerant pipeline drops to the second pressure value (for example, 0.2 bar), the vacuum exhaust outlet valve is closed and the exhaust valve is reopened, that is, the quick exhaust system is in the first state at this time. This series of operations is to further ensure that the nitrogen in the pipeline can be completely emptied to normal atmospheric pressure.

[0017] The present application scheme sets a vacuum exhaust outlet valve and a vacuum exhaust tank, and utilizes the vacuum environment in the vacuum exhaust tank to quickly absorb the remaining gas in the vehicle refrigerant pipeline, thereby greatly improving the exhaust efficiency, so that the gas in the vehicle refrigerant pipeline can be quickly and efficiently emptied, saving a lot of time for the entire exhaust process.

[0018] According to another specific embodiment of the present invention, the quick exhaust system includes a vacuum sensor and a pre-vacuum valve, the vacuum sensor is connected to the pre-vacuum valve, the vacuum sensor is used to detect the vacuum degree of the gas in the external vehicle refrigerant pipeline, and the quick exhaust system switches between the third state and the fourth state according to the vacuum degree;

[0019] In the third state, the exhaust valve and the vacuum exhaust outlet valve are closed, and the external vehicle refrigerant pipeline, the pre-vacuum valve and the vacuum pump are connected in sequence;

[0020] In the fourth state, the pre-vacuum valve and the vacuum exhaust inlet valve are closed, and the vacuum exhaust tank, the vacuum exhaust outlet valve, the exhaust valve and the external atmosphere are connected in sequence.

[0021] With the above technical solution, after the step of exhausting the nitrogen in the vehicle refrigerant pipeline is completed, the vehicle refrigerant pipeline needs to be evacuated to a vacuum state to prepare for the subsequent refrigerant filling. During the vacuuming process, the quick exhaust system is in the third state, the exhaust valve and the vacuum exhaust inlet valve are closed, the vehicle refrigerant pipeline, the pre-vacuuming valve and the vacuum pump are connected in sequence, and the vehicle refrigerant pipeline is evacuated using the vacuum pump.

[0022] After the pre-vacuuming of the vehicle refrigerant pipeline is completed, the quick exhaust system is switched from the third state to the fourth state. Close the pre-vacuuming valve, keep the vacuum exhaust inlet valve closed, open the exhaust valve and the vacuum exhaust outlet valve, so that the vacuum exhaust tank, the vacuum exhaust outlet valve, the exhaust valve and the outside atmosphere are connected in sequence. In this way, the nitrogen stored in the vacuum exhaust tank can be discharged into the atmosphere along this connecting path. During the discharge of the nitrogen in the vacuum exhaust tank, the vehicle interface adapter is separated from the vehicle refrigerant pipeline, and the quick exhaust system moves to the next vehicle to perform positive pressure testing, pre-vacuuming and other operations on the next vehicle.

[0023] Regarding the triggering condition for the quick exhaust system to switch from the third state to the fourth state, in some possible embodiments, after the vehicle interface adapter is separated from the vehicle refrigerant pipeline, the exhaust valve and the vacuum exhaust outlet valve are triggered to open to exhaust the vacuum exhaust tank. At the same time, the quick exhaust system moves to the next vehicle to perform positive pressure testing, pre-vacuuming and other operations on the next vehicle.

[0024] This parallel operation of exhausting the vacuum exhaust tank while moving the quick exhaust system to the next vehicle reduces the time required for the entire process, improves the exhaust efficiency, and optimizes the entire exhaust process. And because the time required for the vacuum exhaust tank to exhaust nitrogen is much shorter than the time required for the quick exhaust system to move to the next vehicle, this means that the working efficiency of the entire system is further improved.

[0025] In some possible embodiments, if the exhaust of the vacuum exhaust tank has been completed during the process of moving the quick exhaust system to the next vehicle, the vacuum exhaust outlet valve can be closed, and the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump can be connected in sequence, and the vacuum pump works to evacuate the vacuum exhaust tank.

[0026] According to another specific embodiment of the present invention, the rapid exhaust system further includes a vacuum protection tank disposed between the pre-vacuum valve and the vacuum pump.

[0027] By adopting the above technical solution, since there may be water or impurities in the vehicle refrigerant pipeline, when the vehicle refrigerant pipeline is evacuated, the water or impurities will enter the vacuum protection tank instead of entering the vacuum pump, thereby avoiding damage to the vacuum pump and protecting the vacuum pump.

[0028] According to another specific embodiment of the present invention, the quick exhaust system includes a pressurizing portion, and the quick exhaust system is switchable between the first state and a fifth state;

[0029] In the fifth state, the pressurizing part is connected to the external vehicle refrigerant pipeline, the exhaust valve, the vacuum exhaust outlet valve and the pre-vacuum valve are closed, and the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are connected in sequence.

[0030] By adopting the above technical solution, before conducting the refrigerant positive pressure test, the quick exhaust system is in the fifth state, the pressurizing part and the vehicle refrigerant pipeline are connected in sequence, and nitrogen with a certain pressure (for example, 13 bar) is filled into the vehicle refrigerant pipeline to prepare for the refrigerant positive pressure test.

[0031] At the same time, the vacuum exhaust outlet valve is closed, so that the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are connected in sequence, and the vacuum pump works to maintain a vacuum state in the vacuum exhaust tank, in preparation for the subsequent suction of the remaining nitrogen in the vehicle refrigerant pipeline. In some possible embodiments, after the vacuum exhaust tank reaches a certain vacuum degree, the vacuum exhaust inlet valve can be closed, the vacuum pump can be stopped, and the vacuum degree of the vacuum exhaust tank can be maintained by closing the vacuum exhaust outlet valve and the vacuum exhaust inlet valve.

[0032] According to another specific embodiment of the present invention, the quick exhaust system includes a filter, and the filter is arranged between the exhaust valve, the pre-vacuum valve, the pressurizing part and the vacuum exhaust outlet valve and the external vehicle refrigerant pipeline.

[0033] With the above technical solution, there may be some impurities in the vehicle refrigerant pipeline. If the impurities are sucked into the exhaust valve, vacuum exhaust outlet valve and other structures, it may cause structural damage. Therefore, a filter is set after the vehicle refrigerant pipeline, which can allow gas to pass through and block impurities outside, avoiding damage to the exhaust valve, vacuum exhaust outlet valve and other structures due to the inhalation of impurities.

[0034] According to another specific embodiment of the present invention, the rapid exhaust system includes a flow rate adjustment part and a silencer filter, and the exhaust valve, the flow rate adjustment part and the silencer filter are connected in sequence.

[0035] With the above technical solution, since the exhaust valve makes a loud noise when exhausting gas, the flow rate adjustment unit is provided to adjust the flow rate of the exhaust gas, that is, to adjust the decibel level of the exhaust gas. At the same time, in order to further optimize the effect of reducing noise, a silencer filter is provided to further reduce the decibel level of the exhaust gas and reduce the impact of noise on the surrounding environment.

[0036] According to another specific embodiment of the present invention, the first pressure value is 11 bar to 13 bar, the second pressure value is 0.2 bar to 0.4 bar, and the third pressure value is 2.5 bar to 3 bar.

[0037] The embodiment of the present invention further discloses a test system, the test system comprising:

[0038] A quick exhaust system as described in any of the preceding items;

[0039] A vehicle, the vehicle comprising a vehicle refrigerant pipeline, wherein;

[0040] When the quick exhaust system is in the first state, the vehicle refrigerant pipeline is in communication with the exhaust valve;

[0041] When the quick exhaust system is in the second state, the vehicle refrigerant pipeline is connected to the vacuum exhaust tank.

[0042] By adopting the above technical solution, the vacuum environment in the vacuum exhaust tank can be used to quickly absorb the remaining gas in the vehicle's refrigerant pipeline, greatly improving the exhaust efficiency, so that the gas in the vehicle's refrigerant pipeline can be quickly and efficiently emptied, saving a lot of time for the entire exhaust process.

[0043] The embodiment of the present invention further discloses a test system, the test system comprising:

[0044] The quick exhaust system;

[0045] A vehicle, the vehicle comprising a vehicle refrigerant pipeline, wherein;

[0046] When the quick exhaust system is in the third state, the vehicle refrigerant pipeline is connected to the vacuum pump.

[0047] The embodiment of the present invention further discloses a test system, the test system comprising:

[0048] The quick exhaust system;

[0049] A vehicle, the vehicle comprising a vehicle refrigerant pipeline, wherein;

[0050] When the quick exhaust system is in the fifth state, the vehicle refrigerant pipeline is in communication with the pressurizing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram showing a quick exhaust system according to an embodiment of the present invention;

[0052] Figure 2 A schematic diagram showing a quick exhaust system according to an embodiment of the present invention in a first state;

[0053] Figure 3 A schematic diagram showing a quick exhaust system according to an embodiment of the present invention in a second state;

[0054] Figure 4 A schematic diagram showing a quick exhaust system in a third state according to an embodiment of the present invention;

[0055] Figure 5 A schematic diagram showing a quick exhaust system in a fourth state according to an embodiment of the present invention;

[0056] Figure 6 A schematic diagram showing the quick exhaust system according to an embodiment of the present invention in a fifth state.

[0057] Description of Reference Numerals

[0058] Quick exhaust system 100;

[0059] Exhaust valve 110;

[0060] Vacuum exhaust section 120; vacuum exhaust outlet valve 121; vacuum exhaust tank 122; vacuum exhaust inlet valve 123;

[0061] Vacuum pump 130;

[0062] Pressure sensor 140;

[0063] Pre-vacuuming part 150; vacuum sensor 151; pre-vacuuming valve 152; vacuum protection tank 153;

[0064] A pressurizing unit 160;

[0065] Filter 170;

[0066] Flow rate adjustment unit 180;

[0067] Silencer filter 190;

[0068] Vehicle interface adapter 200 . DETAILED DESCRIPTION

[0069] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0070] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0071] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0072] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0073] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0074] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0075] refer to Figure 1The embodiment of the present application provides a test system (not shown in the figure), including a quick exhaust system 100 and a vehicle (not shown in the figure), wherein the vehicle includes a vehicle refrigerant pipeline (not shown in the figure). The quick exhaust system 100 is connected to the vehicle refrigerant pipeline via a vehicle interface adapter 200.

[0076] The quick exhaust system 100 includes an exhaust valve 110, a vacuum exhaust unit 120, a vacuum pump 130, and a pressure sensor 140. The exhaust valve 110 is connected to the vehicle refrigerant pipeline through the vehicle interface adapter 200. The vacuum exhaust unit 120 includes a vacuum exhaust outlet valve 121, a vacuum exhaust tank 122, and a vacuum exhaust inlet valve 123 that are connected in sequence. The vacuum exhaust outlet valve 121 is connected to the vehicle refrigerant pipeline through the vehicle interface adapter 200, and the vacuum exhaust inlet valve 123 is connected to the vacuum pump 130.

[0077] The pressure sensor 140 is connected to the exhaust valve 110 and the vacuum exhaust outlet valve 121, and the pressure sensor 140 is used to detect the pressure value of the gas in the vehicle refrigerant pipeline. The quick exhaust system 100 switches between the first state and the second state based on the pressure value detected by the pressure sensor 140. It should be noted that the "air pressure value" and "pressure value" in the context of this application refer to the pressure difference between the air pressure in the vehicle refrigerant pipeline and the ambient air pressure or the standard atmospheric pressure.

[0078] In the first state, the air pressure in the vehicle refrigerant pipeline is a first pressure value and a second pressure value, the vehicle refrigerant pipeline, the exhaust valve 110 and the external atmosphere are connected in sequence, the vacuum exhaust outlet valve 121 is closed, and the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence.

[0079] In the second state, the air pressure value in the vehicle refrigerant pipeline is the third pressure value, the first pressure value is greater than the third pressure value, the third pressure value is greater than the second pressure value, the exhaust valve 110 and the vacuum exhaust inlet valve 123 are closed, and the vehicle refrigerant pipeline, the vacuum exhaust outlet valve 121 and the vacuum exhaust tank 122 are connected in sequence.

[0080] With the above technical solution, when a positive pressure test is performed on the vehicle refrigerant pipeline, a gas with a certain pressure (such as nitrogen) will be filled into the vehicle refrigerant pipeline to test the sealing performance of the vehicle refrigerant pipeline under a high pressure environment. At this time, the air pressure value in the vehicle refrigerant pipeline is a first pressure value (such as 13 bar). After the positive pressure test is completed, the nitrogen in the vehicle refrigerant pipeline needs to be exhausted. At this time, the exhaust valve 110 is opened. Since the air pressure value in the vehicle refrigerant pipeline is 13 bar at this time, which is much greater than the air pressure value of the outside atmosphere, the nitrogen in the vehicle refrigerant pipeline begins to be naturally discharged to the outside atmosphere through the exhaust valve 110 under the action of the air pressure difference (the flow route of the nitrogen is as shown in FIG. 1). Figure 2At the same time, the vacuum exhaust outlet valve 121 is closed, the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence, and the vacuum pump 130 works to keep the vacuum exhaust tank 122 in a vacuum state (for example, the vacuum degree is about 2 mbar or 3 mbar, and the gas flow route is as shown in FIG. Figure 2 In the B area, as shown by the dotted arrow, this is done to prepare for the subsequent removal of the remaining nitrogen in the vehicle's refrigerant pipeline.

[0081] It should be noted that, in some possible embodiments, after the vacuum exhaust tank 122 reaches a certain vacuum degree (for example, the vacuum degree is approximately 2 mbar or 3 mbar), the vacuum exhaust inlet valve 123 can be closed, the vacuum pump 130 can be stopped, and the vacuum degree of the vacuum exhaust tank 122 can be maintained by closing the vacuum exhaust outlet valve 121 and the vacuum exhaust inlet valve 123.

[0082] As the nitrogen is continuously discharged, the air pressure in the vehicle refrigerant pipeline gradually decreases. When the pressure sensor 140 detects that the air pressure value in the vehicle refrigerant pipeline drops to the third pressure value (for example, 3 bar), the discharge speed of the nitrogen slows down significantly. This is because as the air pressure decreases, the power of nitrogen being discharged from the vehicle refrigerant pipeline gradually decreases, the pressure difference between the inside and outside becomes smaller, and the flow of nitrogen becomes less smooth.

[0083] At this time, the quick exhaust system 100 is switched to the second state, the exhaust valve 110 is closed, and then the vacuum exhaust outlet valve 121 is opened, and the vacuum exhaust inlet valve 123 is closed. Since the vacuum exhaust tank 122 is in a vacuum state, the internal air pressure is much lower than the air pressure in the vehicle refrigerant pipeline at this time. Under the effect of this huge air pressure difference, the vacuum exhaust tank 122 is like a powerful "suction pump" that can rely on its own vacuum environment to accelerate the absorption of the remaining nitrogen in the vehicle refrigerant pipeline (the flow route of the nitrogen is as shown in FIG. Figure 3 This exhaust method using the vacuum principle is much more efficient than simply relying on natural exhaust.

[0084] As the vacuum exhaust tank 122 continues to work, the air pressure in the vehicle refrigerant pipeline will continue to drop. When the air pressure in the vehicle refrigerant pipeline drops to a second pressure value (for example, 0.2 bar), the vacuum exhaust outlet valve 121 is closed and the exhaust valve 110 is reopened. That is, the quick exhaust system 100 is now in the first state (the flow path of nitrogen is as shown in FIG. Figure 2 This series of operations is to further ensure that the nitrogen in the pipeline can be completely evacuated to normal atmospheric pressure.

[0085] The present invention provides a vacuum exhaust outlet valve 121 and a vacuum exhaust tank 122, and utilizes the vacuum environment in the vacuum exhaust tank 122 to quickly absorb the remaining gas in the vehicle refrigerant pipeline. Compared with the prior art that only relies on the exhaust valve 110 to exhaust nitrogen (the flow route of nitrogen in the prior art is as follows Figure 2 As shown by the dotted arrow in area A, the present application greatly improves the exhaust efficiency, so that the gas in the vehicle refrigerant pipeline can be quickly and efficiently exhausted, saving a lot of time for the entire exhaust process.

[0086] In some possible implementations, the first pressure value is 11 bar to 13 bar, the second pressure value is 0.2 bar to 0.4 bar, and the third pressure value is 2.5 bar to 3 bar.

[0087] It should be noted that the embodiment of the present application does not specifically limit the specific numerical value of the first pressure value. For example, in other possible implementations, the first pressure value may also be 11 bar, 11.5 bar, 12.6 bar, 13 bar, etc. The embodiment of the present application does not specifically limit the specific numerical value of the second pressure value. For example, in other possible implementations, the second pressure value may also be 0.2 bar, 0.21 bar, 0.32 bar, 0.4 bar, etc. The embodiment of the present application does not specifically limit the specific numerical value of the third pressure value. For example, in other possible implementations, the third pressure value may also be 2.5 bar, 2.7 bar, 2.8 bar, 3 bar, etc.

[0088] In some possible implementations, reference Figure 1 The quick exhaust system 100 includes a pre-vacuum unit 150. The pre-vacuum unit 150 includes a vacuum sensor 151 and a pre-vacuum valve 152. The pre-vacuum valve 152 is connected to the vehicle refrigerant pipeline through the vehicle interface adapter 200, and the vacuum sensor 151 is connected to the pre-vacuum valve 152. The vacuum sensor 151 is used to detect the vacuum degree in the vehicle refrigerant pipeline. The quick exhaust system 100 switches between the third state and the fourth state based on the vacuum degree detected by the vacuum sensor 151.

[0089] In the third state, the vehicle refrigerant pipeline, the pre-vacuum valve 152, the vacuum protection tank 153 and the vacuum pump 130 are connected in sequence, and the exhaust valve 110 and the vacuum exhaust inlet valve 123 are closed.

[0090] In the fourth state, the pre-vacuum valve 152 and the vacuum exhaust inlet valve 123 are closed, and the vacuum exhaust tank 122, the vacuum exhaust outlet valve 121, the exhaust valve 110 and the outside atmosphere are connected in sequence.

[0091] With the above technical solution, after the step of exhausting the nitrogen in the vehicle refrigerant pipeline is completed, the vehicle refrigerant pipeline needs to be evacuated to a vacuum state to prepare for the subsequent refrigerant filling. During the vacuuming process, the quick exhaust system 100 is in the third state, the exhaust valve 110 and the vacuum exhaust inlet valve 123 are closed, the vehicle refrigerant pipeline, the pre-vacuuming valve 152, the vacuum protection tank 153 and the vacuum pump 130 are connected in sequence, and the vehicle refrigerant pipeline is evacuated by the vacuum pump 130 (the gas flow path is as shown in FIG. 1 ). Figure 4 (indicated by the dashed arrow in the middle).

[0092] After the vehicle refrigerant pipeline is pre-evacuated, the quick exhaust system 100 is switched from the third state to the fourth state. Close the pre-evacuation valve 152, keep the vacuum exhaust inlet valve 123 closed, open the exhaust valve 110 and the vacuum exhaust outlet valve 121, so that the vacuum exhaust tank 122, the vacuum exhaust outlet valve 121, the exhaust valve 110 and the outside atmosphere are connected in sequence. In this way, the nitrogen stored in the vacuum exhaust tank 122 can be discharged into the atmosphere along this connection path (the flow route of the nitrogen is as shown in FIG. 1 ). Figure 5 During the exhaust of nitrogen in the vacuum exhaust tank 122, the vehicle interface adapter 200 is separated from the vehicle refrigerant pipeline, and the quick exhaust system 100 moves to the next vehicle to perform positive pressure testing, pre-vacuuming and other operations on the next vehicle.

[0093] It should be noted that, for the triggering condition of switching the quick exhaust system 100 from the third state to the fourth state, in some possible embodiments, after the vehicle interface adapter 200 is separated from the vehicle refrigerant pipeline, the exhaust valve 110 and the vacuum exhaust outlet valve 121 are triggered to open to exhaust the vacuum exhaust tank 122. At the same time, the quick exhaust system 100 moves to the next vehicle to perform positive pressure testing, pre-vacuuming and other operations on the next vehicle.

[0094] This parallel operation mode of exhausting the vacuum exhaust tank 122 while moving the quick exhaust system 100 to the next vehicle reduces the time required for the entire process, improves the exhaust efficiency, and optimizes the entire exhaust process. In addition, since the time required for the vacuum exhaust tank 122 to exhaust nitrogen is much shorter than the time required for the quick exhaust system 100 to move to the next vehicle, this means that the working efficiency of the entire system is further improved.

[0095] It should be noted that in some possible embodiments, if the exhaust of the vacuum exhaust tank 122 has been completed during the process of moving the quick exhaust system 100 to the next vehicle, the vacuum exhaust outlet valve 121 can be closed, and the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence, and the vacuum pump 130 works to evacuate the vacuum exhaust tank 122.

[0096] In some possible implementations, the pre-vacuum part 150 includes a vacuum protection tank 153 disposed between the pre-vacuum valve 152 and the vacuum pump 130 .

[0097] By adopting the above technical solution, since there may be water or impurities in the vehicle refrigerant pipeline, when the vehicle refrigerant pipeline is evacuated, the water or impurities will enter the vacuum protection tank 153 instead of entering the vacuum pump 130, thereby avoiding damage to the vacuum pump 130 and protecting the vacuum pump 130.

[0098] In some possible implementations, reference Figure 1 The quick exhaust system 100 includes a pressurizing unit 160 , and the quick exhaust system 100 can be switched between a first state and a fifth state.

[0099] In the fifth state, the pressurizing part 160 is connected to the external vehicle refrigerant pipeline through the vehicle interface adapter 200, the exhaust valve 110, the vacuum exhaust outlet valve 121 and the pre-vacuum valve 152 are closed, and the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence.

[0100] By adopting the above technical solution, before the refrigerant positive pressure test is performed, the quick exhaust system 100 is in the fifth state, the pressurizing unit 160 is connected to the vehicle refrigerant pipeline, and nitrogen with a certain pressure (for example, 13 bar) is filled into the vehicle refrigerant pipeline (the flow path of the nitrogen is as follows Figure 6 In the C area, as shown by the dotted arrow, it is prepared for the refrigerant positive pressure test.

[0101] At the same time, the exhaust valve 110, the vacuum exhaust outlet valve 121 and the pre-vacuum valve 152 are closed, so that the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence, and the vacuum pump 130 is operated to keep the vacuum state in the vacuum exhaust tank 122 (the flow route of the gas is as follows Figure 6 It should be noted that in some possible embodiments, after the vacuum exhaust tank 122 reaches a certain vacuum degree, the vacuum exhaust inlet valve 123 can be closed, the vacuum pump 130 can be stopped, and the vacuum degree of the vacuum exhaust tank 122 can be maintained by closing the vacuum exhaust outlet valve 121 and the vacuum exhaust inlet valve 123.

[0102] In some possible implementations, reference Figure 1 The quick exhaust system 100 includes a filter 170 , which is disposed between the exhaust valve 110 , the pre-vacuum valve 152 , the pressurizing portion 160 , the vacuum exhaust outlet valve 121 and the vehicle interface adapter 200 .

[0103] With the above technical solution, there may be some impurities in the vehicle refrigerant pipeline. If the impurities are sucked into the exhaust valve 110, the vacuum exhaust outlet valve 121 and other structures, it may cause structural damage. Therefore, a filter 170 is set after the vehicle refrigerant pipeline, which can allow gas to pass through and block impurities outside, thereby avoiding damage to the exhaust valve 110, the vacuum exhaust outlet valve 121 and other structures caused by the inhalation of impurities.

[0104] In some possible implementations, the rapid exhaust system 100 includes a flow rate adjustment unit 180 and a silencer filter 190 , and the exhaust valve 110 , the flow rate adjustment unit 180 , and the silencer filter 190 are sequentially connected.

[0105] With the above technical solution, since the exhaust valve 110 makes a loud sound when exhausting gas, the flow rate adjustment unit 180 is provided to adjust the flow rate of the exhaust gas, that is, to adjust the decibel level of the exhaust gas. At the same time, in order to further optimize the effect of reducing noise, the silencing filter 190 is provided to further reduce the decibel level of the exhaust gas and reduce the impact of the noise on the surrounding environment.

[0106] Reference below Figures 1 to 6 , and further describe the working process of the quick exhaust system 100 in detail.

[0107] First, before the refrigerant positive pressure test is performed, the quick exhaust system 100 is in the fifth state, the pressurizing unit 160 is connected to the vehicle refrigerant pipeline through the vehicle interface adapter 200, and the vehicle refrigerant pipeline is filled with nitrogen at a certain pressure (for example, 13 bar) (the flow path of the nitrogen is as follows Figure 6 As shown by the dotted arrow in the middle C area, it is prepared for the refrigerant positive pressure test, and after the inflation is completed, the pressurizing part 160 is closed.

[0108] At the same time, the exhaust valve 110, the vacuum exhaust outlet valve 121 and the pre-vacuum valve 152 are closed, so that the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence, and the vacuum pump 130 is operated to keep the vacuum state in the vacuum exhaust tank 122 (the flow route of the gas is as follows Figure 6 It should be noted that in some possible embodiments, after the vacuum exhaust tank 122 reaches a certain vacuum degree, the vacuum exhaust inlet valve 123 can be closed, the vacuum pump 130 can be stopped, and the vacuum degree of the vacuum exhaust tank 122 can be maintained by closing the vacuum exhaust outlet valve 121 and the vacuum exhaust inlet valve 123.

[0109] After the refrigerant positive pressure test is completed, the nitrogen in the vehicle refrigerant pipeline needs to be emptied, that is, the fifth state is switched to the first state. At this time, the exhaust valve 110 is opened, and under the action of the air pressure difference, the nitrogen in the vehicle refrigerant pipeline begins to be naturally discharged to the outside atmosphere through the exhaust valve 110 (the flow route of the nitrogen is as follows Figure 2 At the same time, the vacuum exhaust outlet valve 121 remains closed, the vacuum exhaust tank 122, the vacuum exhaust inlet valve 123 and the vacuum pump 130 are connected in sequence, and the vacuum pump 130 works to keep the vacuum exhaust tank 122 in a vacuum state (the gas flow path is shown in FIG. Figure 2 It should be noted that in some possible embodiments, after the vacuum exhaust tank 122 reaches a certain vacuum degree, the vacuum exhaust inlet valve 123 can be closed, the vacuum pump 130 can be stopped, and the vacuum degree of the vacuum exhaust tank 122 can be maintained by closing the vacuum exhaust outlet valve 121 and the vacuum exhaust inlet valve 123.

[0110] As the nitrogen is continuously discharged, the air pressure in the vehicle refrigerant pipeline gradually decreases. When the pressure sensor 140 detects that the air pressure value in the vehicle refrigerant pipeline has dropped to a third pressure value (for example, 3 bar), it is necessary to switch from the first state to the second state. Close the exhaust valve 110, then open the vacuum exhaust outlet valve 121, and close the vacuum exhaust inlet valve 123. Since the vacuum exhaust tank 122 is in a vacuum state, its internal air pressure is much lower than the air pressure in the vehicle refrigerant pipeline at this time. Under the effect of this huge air pressure difference, the vacuum exhaust tank 122 is like a powerful "suction pump", which can rely on its own vacuum environment to accelerate the absorption of the remaining nitrogen in the vehicle refrigerant pipeline (the flow route of the nitrogen is as shown in the figure). Figure 3 (indicated by the dashed arrow in the middle).

[0111] As the vacuum exhaust tank 122 continues to work, the air pressure in the vehicle refrigerant pipeline will continue to drop. When the air pressure in the vehicle refrigerant pipeline drops to a second pressure value (for example, 0.2 bar), it is necessary to switch from the second state to the first state. Close the vacuum exhaust outlet valve 121 and reopen the exhaust valve 110 to further ensure that the nitrogen in the pipeline can be completely emptied to normal atmospheric pressure (the flow route of the nitrogen is as shown in FIG. Figure 2 (indicated by the dotted arrow in area A).

[0112] After the step of exhausting the nitrogen in the vehicle refrigerant pipeline is completed, the vehicle refrigerant pipeline needs to be evacuated to a vacuum state to prepare for the subsequent refrigerant filling. That is, the quick exhaust system 100 switches from the first state to the third state, the exhaust valve 110 and the vacuum exhaust inlet valve 123 are closed, and the vehicle refrigerant pipeline, the pre-vacuum valve 152, the vacuum protection tank 153 and the vacuum pump 130 are connected in sequence to achieve the purpose of evacuating the vehicle refrigerant pipeline (the flow route of the gas is as follows Figure 4 (indicated by the dashed arrow in the middle).

[0113] After the vehicle refrigerant pipeline is evacuated, the quick exhaust system 100 is switched from the third state to the fourth state. The vacuum exhaust inlet valve 123 is closed, and the vacuum exhaust inlet valve 123 is kept closed. The exhaust valve 110 and the vacuum exhaust outlet valve 121 are opened to connect the vacuum exhaust tank 122, the vacuum exhaust outlet valve 121, the exhaust valve 110 and the outside atmosphere in sequence (the flow route of nitrogen is as follows Figure 5 In this way, the nitrogen stored in the vacuum exhaust tank 122 can be discharged into the atmosphere along this connecting path. During the discharge of the nitrogen in the vacuum exhaust tank 122, the vehicle interface adapter 200 is separated from the vehicle refrigerant pipeline, and the quick exhaust system 100 moves to the next vehicle to perform positive pressure testing, pre-vacuuming and other operations on the next vehicle.

[0114] At this time, the refrigerant positive pressure test and pre-vacuuming of a vehicle are completed, and the entire quick exhaust system 100 moves to the next vehicle to start a new refrigerant positive pressure test and a new pre-vacuuming. That is, the quick exhaust system 100 is in the fifth state at this time, and starts to charge the new vehicle with nitrogen.

[0115] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A quick exhaust system, characterized in that: The quick exhaust system comprises: An exhaust valve, the exhaust valve is used to communicate with an external vehicle refrigerant pipeline; A vacuum exhaust section, the vacuum exhaust section comprising a vacuum exhaust outlet valve, a vacuum exhaust tank and a vacuum exhaust inlet valve which are connected in sequence; A vacuum pump, wherein the vacuum exhaust inlet valve is connected to the vacuum pump; A pressure sensor, the pressure sensor is connected to the exhaust valve and the vacuum exhaust outlet valve, the pressure sensor is used to detect the pressure value of the gas in the external vehicle refrigerant pipeline, and the quick exhaust system switches between the first state and the second state according to the pressure value, wherein; In the first state, the air pressure value in the external vehicle refrigerant pipeline is the first pressure value or the second pressure value, the external vehicle refrigerant pipeline, the exhaust valve and the external atmosphere are connected in sequence, the vacuum exhaust outlet valve is closed, the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are connected in sequence, or the vacuum exhaust inlet valve is also closed; In the second state, the air pressure value in the external vehicle refrigerant pipeline is a third pressure value, the first pressure value is greater than the third pressure value, the third pressure value is greater than the second pressure value, the exhaust valve and the vacuum exhaust inlet valve are closed, and the external vehicle refrigerant pipeline, the vacuum exhaust outlet valve and the vacuum exhaust tank are connected in sequence.

2. The quick exhaust system according to claim 1, characterized in that: The quick exhaust system includes a vacuum sensor and a pre-vacuum valve, the vacuum sensor is connected to the pre-vacuum valve, the vacuum sensor is used to detect the vacuum degree of the gas in the external vehicle refrigerant pipeline, and the quick exhaust system switches between the third state and the fourth state according to the vacuum degree; In the third state, the exhaust valve and the vacuum exhaust outlet valve are closed, and the external vehicle refrigerant pipeline, the pre-vacuum valve and the vacuum pump are connected in sequence; In the fourth state, the pre-vacuum valve and the vacuum exhaust inlet valve are closed, and the vacuum exhaust tank, the vacuum exhaust outlet valve, the exhaust valve and the external atmosphere are connected in sequence.

3. The quick exhaust system according to claim 2, characterized in that: The rapid exhaust system further comprises a vacuum protection tank arranged between the pre-vacuum valve and the vacuum pump.

4. The quick exhaust system according to claim 1 or 2, characterized in that: The quick exhaust system includes a pressurizing portion, and the quick exhaust system is switchable between the first state and a fifth state; In the fifth state, the pressurizing part is connected to the external vehicle refrigerant pipeline, the exhaust valve, the vacuum exhaust outlet valve and the pre-vacuum valve are closed, and the vacuum exhaust tank, the vacuum exhaust inlet valve and the vacuum pump are connected in sequence.

5. The quick exhaust system according to claim 1, characterized in that: The quick exhaust system comprises a filter, and the filter is arranged between the exhaust valve, the pre-vacuum valve, the pressurizing part, the vacuum exhaust outlet valve and the external vehicle refrigerant pipeline.

6. The quick exhaust system according to claim 1, characterized in that: The quick exhaust system comprises a flow rate adjustment part and a silencer filter, and the exhaust valve, the flow rate adjustment part and the silencer filter are connected in sequence.

7. The quick exhaust system according to claim 1, characterized in that: The first pressure value is 11 bar to 13 bar, the second pressure value is 0.2 bar to 0.4 bar, and the third pressure value is 2.5 bar to 3 bar.

8. A testing system, characterized in that: The test system comprises: The quick exhaust system according to any one of claims 1 to 7; A vehicle, the vehicle comprising a vehicle refrigerant pipeline, wherein; When the quick exhaust system is in the first state, the vehicle refrigerant pipeline is in communication with the exhaust valve; When the quick exhaust system is in the second state, the vehicle refrigerant pipeline is connected to the vacuum exhaust tank.

9. A testing system, characterized in that: The test system comprises: The quick exhaust system according to claim 2; A vehicle, the vehicle comprising a vehicle refrigerant pipeline, wherein; When the quick exhaust system is in the third state, the vehicle refrigerant pipeline is connected to the vacuum pump.

10. A testing system, characterized in that: The test system comprises: The quick exhaust system according to claim 4; A vehicle, the vehicle comprising a vehicle refrigerant pipeline, wherein; When the quick exhaust system is in the fifth state, the vehicle refrigerant pipeline is in communication with the pressurizing unit.

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