Liquid adding and gas removing device and test system

Abstract

This invention provides a liquid filling and degassing device and a testing system. The liquid filling and degassing device is used to add liquid and degas the cooling circuit of an engine system. The device includes: a liquid reservoir with a receiving cavity for containing coolant; a first pipeline assembly, the first end of which is connected to the receiving cavity, and the second end of which is connected to the inlet of the cooling circuit to allow coolant in the receiving cavity to enter the cooling circuit; and a second pipeline assembly, the first end of which is connected to the outlet of the cooling circuit, and the second end of which is connected to the receiving cavity to allow coolant in the cooling circuit to flow back into the receiving cavity. The liquid reservoir also has a first vent connected to the receiving cavity, allowing gas in the cooling circuit to flow through the second pipeline assembly and be discharged through the first vent. This invention solves the problem of long venting time in the cooling circuit of engines in the prior art.

Description

Technical Field

[0001] This invention relates to the field of engine testing equipment technology, and more specifically, to a liquid addition and degassing device and testing system. Background Technology

[0002] Currently, during the production of hydrogen fuel cell engine systems, water needs to be added to the cooling circuit after the engine is placed on the test bench for degassing. Specifically, coolant is used to submerge the engine or test bench water pump by gravity, and the internal engine water pump then drives the gases in the engine's main pipeline out through the engine's exhaust port. However, the above-mentioned water-addition degassing method has the following drawbacks:

[0003] The engine's exhaust pipe is narrow, making it difficult for air bubbles to escape and resulting in a long exhaust time; only the pressure difference between the hydrogen and water lines is considered, while the pressure difference between the air lines is not; relying on gravity to submerge the engine water pump can easily cause the water pump to run dry when the height difference is small; it is difficult to judge the degassing effect; repeating this process during production will cause the water inside the testing equipment to be emptied repeatedly, increasing the degassing time and cost; low-power water pumps have a long exhaust time; adding water and degassing after the engine is placed on the test bench generally takes more than 30 minutes, which is inefficient. Summary of the Invention

[0004] The main objective of this invention is to provide a liquid addition and degassing device and a testing system to solve the problem of long exhaust time in the cooling circuit of engines in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a liquid-adding and degassing device is provided for adding liquid and degassing the cooling circuit of an engine system. The liquid-adding and degassing device includes: a liquid reservoir having a receiving cavity for containing coolant; a first pipeline assembly having a first end connected to the receiving cavity and a second end connected to the inlet of the cooling circuit to allow coolant in the receiving cavity to enter the cooling circuit; and a second pipeline assembly having a first end connected to the outlet of the cooling circuit and a second end connected to the receiving cavity to allow coolant in the cooling circuit to flow back into the receiving cavity; wherein the liquid reservoir further has a first vent connected to the receiving cavity to allow gas in the cooling circuit to flow through the second pipeline assembly and be discharged from the first vent.

[0006] Furthermore, the engine system includes a fuel cell having a coolant chamber, a hydrogen chamber, and an air chamber. The coolant chamber is located on the cooling circuit. The liquid addition and degassing device also includes a third pipeline assembly. The first end of the third pipeline assembly is used to introduce gas, and the second end of the third pipeline assembly is used to connect to both the hydrogen chamber and the air chamber, so that the third pipeline assembly controls the gas pressure entering the hydrogen chamber and the air chamber.

[0007] Furthermore, the first connecting pipe has a first end connected to the outlet of the cooling circuit and a second end connected to the receiving cavity; wherein at least a portion of the first connecting pipe is a transparent portion made of a transparent material.

[0008] Furthermore, the second pipeline assembly also includes: a first pressure sensor disposed on the first connecting pipe and located between the transparent portion and the first end of the first connecting pipe, the first pressure sensor being used to detect the pressure at the outlet; and / or, a first check valve disposed on the first connecting pipe and located between the transparent portion and the second end of the first connecting pipe.

[0009] Furthermore, the first pipeline assembly also includes: a second connecting pipe, the first end of which is connected to the receiving cavity, and the second end of which is connected to the liquid inlet; a first pump body, which is disposed on the second connecting pipe; and a second pressure sensor, which is disposed on the second connecting pipe and located on the side of the first pump body away from the first end of the second connecting pipe, and the second pressure sensor is used to detect the pressure at the liquid inlet.

[0010] Furthermore, the first pipeline assembly also includes: a first control valve, disposed on the second connecting pipe and located on the side of the first pump body near the storage tank; a third connecting pipe, the first end and the second end of the third connecting pipe being connected and communicating with the second connecting pipe respectively, the first end of the third connecting pipe being located on the side of the first control valve near the storage tank, and the second end of the third connecting pipe being located between the first pump body and the second pressure sensor; and a second control valve, disposed on the third connecting pipe.

[0011] Furthermore, the first pipeline assembly also includes: a second check valve disposed on the second connecting pipe and located between the second pressure sensor and the second end of the third connecting pipe; and / or, a flow meter disposed on the second connecting pipe and located between the second pressure sensor and the second end of the third connecting pipe.

[0012] Furthermore, the third piping assembly also includes: a fourth connecting pipe, the first end of which is used to introduce gas, and the second end of which is used to communicate with both the hydrogen chamber and the air chamber; a pressure control valve assembly, disposed on the fourth connecting pipe and located between the first and second ends of the fourth connecting pipe, to control the gas pressure flowing out of the second end of the fourth connecting pipe; and a third pressure sensor, disposed on the fourth connecting pipe and located on the side of the pressure control valve assembly away from the first end of the fourth connecting pipe, to detect the gas pressure flowing out of the second end of the fourth connecting pipe.

[0013] Furthermore, the liquid addition and degassing device also includes: a pressure reducing valve, which is installed on the fourth connecting pipe and located on the side of the pressure control valve assembly near the first end of the fourth connecting pipe; a fourth pressure sensor, which is installed on the fourth connecting pipe and located on the side of the pressure reducing valve near the first end of the fourth connecting pipe; and a filter, which is installed on the fourth connecting pipe and located between the fourth pressure sensor and the pressure reducing valve.

[0014] Furthermore, the liquid addition and degassing device also includes a second pump body, a first liquid level sensor, and a second liquid level sensor. The second pump body is connected to the receiving cavity to deliver coolant into the receiving cavity. At least a portion of the first liquid level sensor and at least a portion of the second liquid level sensor are both disposed within the receiving cavity, with the first liquid level sensor positioned higher than the second liquid level sensor. When the second liquid level sensor detects that the liquid level in the receiving cavity is lower than its own, it controls the second pump body to start; when the first liquid level sensor detects that the liquid level in the receiving cavity is higher than its own, it controls the second pump body to stop operating. And / or, the liquid addition and degassing device also includes a conductivity meter, a third pump body, and a deionizer, with at least a portion of the conductivity meter disposed within the receiving cavity. The device is placed inside the containment cavity to detect the real-time conductivity of the coolant within the cavity; a third pump and a deionizer are both located inside the containment cavity, with the third pump connected to the deionizer. When the conductivity meter detects that the real-time conductivity is greater than a preset conductivity, the third pump is controlled to operate, allowing the coolant to circulate through the deionizer; and / or, the liquid addition and degassing device further includes a first quick-connect fitting, with the second end of the first pipeline assembly detachably connected to the first end of the cooling circuit with an inlet via the first quick-connect fitting; and / or, the liquid addition and degassing device further includes a second quick-connect fitting, with the first end of the second pipeline assembly detachably connected to the second end of the cooling circuit with an outlet via the second quick-connect fitting.

[0015] According to another aspect of the present invention, a testing system is provided, including a test bench for testing an engine system, and the testing system further includes the above-described liquid addition and degassing device.

[0016] Furthermore, the test bench and the liquid addition and degassing device are set up separately so that they can work independently.

[0017] The liquid addition and degassing device of this invention includes a liquid storage tank, a first pipeline assembly, and a second pipeline assembly. The liquid storage tank has a receiving cavity for containing coolant. Coolant flows from the receiving cavity to the first pipeline assembly and then flows into the cooling circuit through the inlet. The coolant, carrying gas from the cooling circuit, flows through the outlet and the second pipeline assembly back to the receiving cavity. The gas carried by the coolant is discharged from the first exhaust port, completing the liquid addition and degassing of the cooling circuit. This invention increases the flow rate of coolant through the cooling circuit by using the first and second pipeline assemblies, increasing the amount of gas carried away by the coolant from the cooling circuit and improving the degassing rate. This solves the problem of long exhaust time in the cooling circuit of existing engines, achieving a rapid degassing effect. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A schematic diagram of an embodiment of the liquid addition and degassing device according to the present invention is shown.

[0020] 1. Engine system; 10. Reservoir; 11. Receiving cavity; 12. Second exhaust port; 20. First piping assembly; 21. Second connecting pipe; 22. First pump body; 23. Second pressure sensor; 24. First control valve; 25. Third connecting pipe; 26. Second control valve; 27. Second check valve; 28. Flow meter; 30. Second piping assembly; 31. First connecting pipe; 311. Transparent part; 32. First pressure sensor; 33. First check valve; 40. Third piping assembly; 41. Fourth connecting pipe; 42. Pressure control valve assembly; 43. Third pressure sensor; 50. Second pump body; 60. First level sensor; 70. Pressure reducing valve; 80. Fourth pressure sensor; 90. Second level sensor; 100. Conductivity meter; 110. Third pump body; 120. Deionizer; 130. First quick-connect tool; 140. Second quick-connect tool; 170. Filter. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] This invention provides a liquid addition and degassing device, please refer to... Figure 1This device is used to add coolant and degas the cooling circuit of engine system 1. The device includes: a reservoir 10 with a receiving cavity 11 for containing coolant; a first pipe assembly 20, the first end of which is connected to the receiving cavity 11, and the second end of which is connected to the inlet of the cooling circuit so that coolant in the receiving cavity 11 enters the cooling circuit; and a second pipe assembly 30, the first end of which is connected to the outlet of the cooling circuit, and the second end of which is connected to the receiving cavity 11 so that coolant in the cooling circuit flows back into the receiving cavity 11; wherein the reservoir 10 also has a first vent connected to the receiving cavity 11 so that gas in the cooling circuit flows through the second pipe assembly 30 and is discharged from the first vent.

[0025] The liquid addition and degassing device of the present invention includes a liquid storage tank 10, a first pipeline assembly 20, and a second pipeline assembly 30. The liquid storage tank 10 has a receiving cavity 11 for containing coolant. The coolant flows out of the receiving cavity 11 to the first pipeline assembly 20 and then flows into the cooling circuit from the inlet. The coolant carries the gas in the cooling circuit through the outlet and the second pipeline assembly 30 back to the receiving cavity 11. The gas carried by the coolant is discharged from the first exhaust port, completing the liquid addition and degassing of the cooling circuit. The liquid addition and degassing device of the present invention increases the flow rate of coolant through the cooling circuit by using the first pipeline assembly 20 and the second pipeline assembly 30, thereby increasing the amount of gas carried away by the coolant from the cooling circuit and improving the degassing rate. This solves the problem of long exhaust time in the cooling circuit of engines in the prior art and achieves a rapid degassing effect.

[0026] In this application, by setting up a liquid reservoir 10, a first pipeline assembly 20 and a second pipeline assembly 30, the engine exhausts through the engine's cooling circuit (thick pipe) instead of through the engine's own exhaust port, resulting in a large exhaust flow and improved exhaust efficiency.

[0027] Optionally, the reservoir 10 also has a second vent 12 connected to the receiving cavity 11. The second vent 12 is connected to the engine's own vent, and the coolant pumped out by the engine vent flows into the receiving cavity 11 from the second vent 12. However, the second vent 12 is just a reserved vent, and not all engines necessarily need such an interface.

[0028] Optionally, the coolant is a mixture of ethylene glycol, i.e., a colorless, odorless, and sweet-tasting liquid.

[0029] In this embodiment, the engine system 1 includes a fuel cell, which has a coolant chamber, a hydrogen chamber, and an air chamber. The coolant chamber is disposed on the cooling circuit. The liquid addition and degassing device further includes a third pipeline assembly 40. The first end of the third pipeline assembly 40 is used to introduce gas, and the second end of the third pipeline assembly 40 is used to connect to both the hydrogen chamber and the air chamber, so that the third pipeline assembly 40 controls the gas pressure entering the hydrogen chamber and the air chamber.

[0030] Specifically, gas flows into the hydrogen chamber and air chamber through the third piping assembly 40. The third piping assembly 40 controls the gas pressure entering the hydrogen and air chambers, allowing simultaneous pressurization of the coolant chamber, hydrogen chamber, and air chamber. This prevents excessive pressure difference between the three chambers, which could damage the fuel cell's coolant chamber, hydrogen chamber, and air chamber, and consequently, the fuel cell and engine system 1. Furthermore, simultaneous pressurization of the three chambers increases the water flow rate, significantly improving exhaust efficiency and shortening exhaust time.

[0031] Optionally, the gas may be compressed air or other inert gas.

[0032] In this embodiment, the second pipeline assembly 30 includes: a first connecting pipe 31, the first end of the first connecting pipe 31 being connected to the outlet of the cooling circuit, and the second end of the first connecting pipe 31 being connected to the receiving cavity 11; wherein, at least a portion of the first connecting pipe 31 is a transparent portion 311, and the transparent portion 311 is made of a transparent material.

[0033] Specifically, the coolant, carrying gas, flows from the outlet of the cooling circuit into the first connecting pipe 31, and then into the receiving cavity 11. The degassing process can be observed in real time through the transparent part 311, allowing for precise control of the degassing progress and shortening the coolant addition and degassing time. When degassing is not complete, the coolant in the first connecting pipe 31 will contain a large number of air bubbles. When degassing is about to be completed, a small number of air bubbles will remain at the top of the first connecting pipe 31. Increasing the coolant flow rate will cause the air bubbles to disappear.

[0034] Optionally, the first connecting pipe 31 is a large-diameter connecting pipe to ensure sufficient coolant flow back to the receiving cavity 11 and to ensure that the coolant carries away more air in each cycle.

[0035] In this embodiment, the second pipeline assembly 30 further includes: a first pressure sensor 32, disposed on the first connecting pipe 31 and located between the transparent portion 311 and the first end of the first connecting pipe 31, the first pressure sensor 32 being used to detect the pressure at the outlet; and / or, a first check valve 33, disposed on the first connecting pipe 31 and located between the transparent portion 311 and the second end of the first connecting pipe 31.

[0036] Specifically, the first pressure sensor 32 is used to detect the pressure at the outlet and feed the pressure value back to the controller, so that the controller can monitor the outlet pressure in real time; the first check valve 33 is used to prevent coolant from flowing back into the cooling circuit and damaging the engine system 1.

[0037] Optionally, the coolant outlet of the cooling circuit can be connected to the small exhaust port of the engine at the same time, so as to exhaust gas at the same time as the first exhaust port, thereby improving the degassing efficiency.

[0038] In this embodiment, the first pipeline assembly 20 further includes: a second connecting pipe 21, the first end of which is connected to the receiving cavity 11, and the second end of which is connected to the liquid inlet; a first pump body 22, which is disposed on the second connecting pipe 21; and a second pressure sensor 23, which is disposed on the second connecting pipe 21 and located on the side of the first pump body 22 away from the first end of the second connecting pipe 21, and the second pressure sensor 23 is used to detect the pressure of the liquid inlet.

[0039] Specifically, the first pump body 22 pumps coolant from the receiving cavity 11 into the second connecting pipe 21, and then the coolant flows into the cooling circuit from the inlet. The higher the rotation speed of the first pump body 22, the greater the flow rate of coolant into the cooling circuit and the greater the pressure at the inlet. The second pressure sensor 23 is used to detect the pressure at the inlet and feed the pressure value back to the controller. The controller realizes real-time monitoring of the inlet pressure. At the same time, based on the pressure difference between the inlet and outlet and the three-chamber inlet pressure requirements of the engine system 1, the controller adjusts the rotation speed of the first pump body 22 to flexibly adjust the pressure at the inlet. The controller also adjusts the gas pressure entering the hydrogen chamber and air chamber through the third pipeline assembly 40, so that the coolant chamber, hydrogen chamber and air chamber can be pressurized simultaneously.

[0040] Optionally, the first pump body 22 is a high-power water pump that can pump a large amount of coolant into the cooling circuit to achieve rapid degassing and avoid insufficient coolant flow into the cooling circuit due to insufficient power of the pump body inside the engine; the second connecting pipe 21 is a large-diameter connecting pipe to avoid insufficient coolant flow into the cooling circuit due to insufficient diameter of the second connecting pipe 21, which would cause the pump body inside the engine to run dry.

[0041] In this embodiment, the first pipeline assembly 20 further includes: a first control valve 24, disposed on the second connecting pipe 21 and located on the side of the first pump body 22 near the liquid storage tank 10; a third connecting pipe 25, the first end and the second end of the third connecting pipe 25 being connected and communicating with the second connecting pipe 21 respectively, the first end of the third connecting pipe 25 being located on the side of the first control valve 24 near the liquid storage tank 10, and the second end of the third connecting pipe 25 being located between the first pump body 22 and the second pressure sensor 23; and a second control valve 26, disposed on the third connecting pipe 25.

[0042] In specific implementation, the second control valve 26 is closed, the third connecting pipe 25 is disconnected, the first control valve 24 is opened, and the first pump body 22 and the internal engine pump body operate simultaneously. After the coolant flows out of the receiving cavity 11, it flows into the cooling circuit through the second connecting pipe 21 and carries the gas in the cooling circuit back to the receiving cavity 11 through the second pipe assembly 30 to complete the liquid addition and degassing. When the second control valve 26 is opened, the third connecting pipe 25 is connected, the first control valve 24 is closed, the second connecting pipe 21 is disconnected, the first pump body 22 stops operating, and the internal engine pump body operates. After the coolant flows out of the receiving cavity 11, it flows into the cooling circuit through the third connecting pipe 25 and carries the gas in the cooling circuit back to the receiving cavity 11 through the second pipe assembly 30 to complete the liquid addition and degassing. At this time, it can be ensured that the gas in the corner gaps of the internal engine water pump can be carried out of the cooling circuit by the coolant. At the same time, the degassing situation can be observed through the transparent part 311 or by observing the speed of the internal engine pump body to determine whether the degassing of the cooling circuit is completed, effectively avoiding incomplete degassing.

[0043] Optionally, the first control valve 24 and the second control valve 26 can be ordinary manual valves or solenoid valves.

[0044] In this embodiment, the first pipeline assembly 20 further includes: a second check valve 27, disposed on the second connecting pipe 21 and located between the second pressure sensor 23 and the second end of the third connecting pipe 25; and / or, a flow meter 28, disposed on the second connecting pipe 21 and located between the second pressure sensor 23 and the second end of the third connecting pipe 25.

[0045] Specifically, the second check valve 27 is used to prevent the coolant in the second connecting pipe 21 from flowing back, which would cause the coolant flow in the cooling circuit to be too small; the flow rate is used to monitor the flow rate in the second connecting pipe 21 in real time, so that the user can adjust the coolant flow rate in the cooling circuit in a timely manner, so as to avoid the coolant flow rate in the cooling circuit being too large or too small, which would affect the degassing effect and increase the degassing time.

[0046] In this embodiment, the third pipeline assembly 40 further includes: a fourth connecting pipe 41, the first end of which is used to introduce gas, and the second end of which is used to communicate with both the hydrogen chamber and the air chamber; a pressure control valve assembly 42, which is disposed on the fourth connecting pipe 41 and located between the first end and the second end of the fourth connecting pipe 41, so as to control the gas pressure flowing out of the second end of the fourth connecting pipe 41; and a third pressure sensor 43, which is disposed on the fourth connecting pipe 41 and located on the side of the pressure control valve assembly 42 away from the first end of the fourth connecting pipe 41, so as to detect the gas pressure flowing out of the second end of the fourth connecting pipe 41.

[0047] Specifically, the gas flows into the hydrogen chamber and the air chamber after passing through the fourth connecting pipe 41; the third pressure sensor 43 is used to detect the gas pressure flowing into the hydrogen chamber and the air chamber and feeds the pressure value back to the controller. The controller realizes real-time monitoring of the gas pressure flowing into the fuel cell, and at the same time, according to the pressure of the coolant chamber, controls the pressure control valve group 42 to quickly adjust the gas pressure flowing out of the second end of the fourth connecting pipe 41 to ensure that the coolant chamber, hydrogen chamber and air chamber can be pressurized simultaneously.

[0048] Specifically, a pressure control valve assembly refers to a valve assembly whose opening is controlled by software, thereby controlling the air pressure.

[0049] In this embodiment, the liquid addition and degassing device further includes: a pressure reducing valve 70, which is disposed on the fourth connecting pipe 41 and located on the side of the pressure control valve group 42 near the first end of the fourth connecting pipe 41; a fourth pressure sensor 80, which is disposed on the fourth connecting pipe 41 and located on the side of the pressure reducing valve near the first end of the fourth connecting pipe 41; and a filter 170, which is disposed on the fourth connecting pipe 41 and located between the fourth pressure sensor 80 and the pressure reducing valve 70.

[0050] In practice, gas flows into the fourth connecting pipe 41 from the first end of the fourth connecting pipe 41, and then flows sequentially through the fourth pressure sensor 80, the filter 170, and the pressure reducing valve 70. The fourth pressure sensor 80 is used to monitor the pressure of the gas flowing into the fourth connecting pipe 41 and feeds the pressure back to the controller. The controller controls the pressure reducing valve 70 to initially reduce the pressure of the gas in the fourth connecting pipe 41 based on the pressure value, thereby reducing the pressure value of the gas. The filter 170 is used to filter out small particles in the gas to avoid damaging the fuel cell.

[0051] In this embodiment, the liquid addition and degassing device further includes a second pump body 50, a first liquid level sensor 60, and a second liquid level sensor 90. The second pump body 50 is connected to the receiving cavity 11 to deliver coolant into the receiving cavity 11. At least a portion of the first liquid level sensor 60 and at least a portion of the second liquid level sensor 90 are disposed within the receiving cavity 11, with the first liquid level sensor 60 positioned higher than the second liquid level sensor 90. When the second liquid level sensor 90 detects that the liquid level in the receiving cavity 11 is lower than its own, it controls the second pump body 50 to start; when the first liquid level sensor 60 detects that the liquid level in the liquid receiving cavity 11 is higher than its own, it controls the second pump body 50 to stop operating. And / or, the liquid addition and degassing device further includes a conductivity meter 100, a third pump body 110, and a deionizer 120. At least a portion of the conductivity meter 100 is disposed within the receiving cavity 11. A portion is disposed within the receiving cavity 11 to detect the real-time conductivity of the coolant within the receiving cavity 11; both the third pump body 110 and the deionizer 120 are disposed within the receiving cavity 11, with the third pump body 110 connected to the deionizer 120, so that when the conductivity meter 100 detects that the real-time conductivity is greater than a preset conductivity, the third pump body 110 is controlled to operate, so that the coolant circulates through the deionizer 120; and / or, the liquid adding and degassing device further includes a first quick-connect tool 130, through which the second end of the first pipeline assembly 20 is detachably connected to the first end of the cooling circuit having a liquid inlet; and / or, the liquid adding and degassing device further includes a second quick-connect tool 140, through which the first end of the second pipeline assembly 30 is detachably connected to the second end of the cooling circuit having a liquid outlet.

[0052] In specific implementation, when the second liquid level sensor 90 detects that the liquid level in the receiving cavity 11 is lower than it, it controls the second pump body 50 to pump coolant into the receiving cavity 11; when the first liquid level sensor 60 detects that the liquid level in the receiving cavity 11 is higher than it, it controls the second pump body 50 to stop operating and no longer deliver coolant into the receiving cavity 11. Real-time monitoring of the coolant level in the receiving cavity 11 is achieved through the first liquid level sensor 60 and the second liquid level sensor 90, realizing automatic replenishment of the liquid adding and degassing device. This eliminates the need for manual observation of the liquid level in the receiving cavity before replenishment, improving the efficiency of liquid adding and degassing and shortening the liquid adding and degassing time.

[0053] In practice, when the conductivity meter 100 detects that the real-time conductivity is greater than the preset conductivity, it controls the third pump body 110 to run, pumping the coolant into the deionizer 120 for circulation, so as to avoid the coolant's conductivity being too high and damaging the fuel cell.

[0054] In practice, the first quick-connect fitting 130 and the second quick-connect fitting 140 enable a quick connection between the coolant filling and degassing device and the engine system 1, which helps to shorten the degassing time. After the coolant flows out of the receiving cavity 11, it flows through the first pipeline assembly 20 and the first quick-connect fitting 130 from the inlet into the cooling circuit. The coolant, carrying the gas in the cooling circuit, flows sequentially through the outlet, the second quick-connect fitting 140, and the second pipeline assembly 30 back to the receiving cavity 11. The gas brought by the coolant is discharged from the first exhaust port, completing the filling and degassing of the cooling circuit.

[0055] The present invention also provides a testing system, including a test bench for testing engine system 1, and the testing system further includes the liquid addition and degassing device in the above embodiments.

[0056] The testing system of the present invention includes a test bench and the liquid addition and degassing device described in the above embodiments. The liquid addition and degassing device includes a liquid storage tank 10, a first pipeline assembly 20, and a second pipeline assembly 30. The liquid storage tank 10 has a receiving cavity 11 for containing coolant. The coolant flows out of the receiving cavity 11 to the first pipeline assembly 20 and then flows into the cooling circuit from the inlet. The coolant carries the gas in the cooling circuit through the outlet and the second pipeline assembly 30 back to the receiving cavity 11. The gas carried by the coolant is discharged from the first exhaust port, completing the liquid addition and degassing of the cooling circuit. The liquid addition and degassing device of the present invention increases the flow rate of coolant through the cooling circuit by using the first pipeline assembly 20 and the second pipeline assembly 30, thereby increasing the amount of gas carried away by the coolant from the cooling circuit and improving the degassing rate. This solves the problem of long exhaust time in the cooling circuit of engines in the prior art and achieves a rapid degassing effect.

[0057] In this embodiment, the test bench and the liquid addition and degassing device are set separately so that they can work independently.

[0058] Specifically, quick-connect fittings are installed at the inlet and outlet of the engine system 1 on the test bench, respectively adapted to the inlet and outlet of the cooling circuit. After the assembly trolley carrying the engine system 1 completes liquid filling and degassing on the liquid filling and degassing device, the first quick-connect fitting 130 is disconnected from the inlet of the cooling circuit, and the second quick-connect fitting 140 is disconnected from the outlet of the cooling circuit. The cooling circuit is then connected to the test bench for testing via the quick-connect fittings. After the test is completed, the quick-connect fittings are disconnected, and the next assembly trolley carrying the engine system 1 is used for testing. The independent operation of the test bench and the liquid filling and degassing device can shorten the testing time, save test bench resources, increase the bench start-up rate, reduce equipment depreciation costs, and reduce labor costs.

[0059] Specifically, the assembly trolley is an engine bench test assembly trolley, equipped with cooling pipes and quick-connect plugs; the quick-connect plugs refer to water connection plugs, and the pipes do not leak water or allow air in during the insertion and removal process; the test bench is the test equipment for testing engine system 1.

[0060] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0061] The liquid addition and degassing device of the present invention can realize automated liquid addition and degassing. While protecting the coolant chamber, hydrogen chamber and air chamber of the engine system 1, it can maximize the flow rate of coolant flowing into the cooling circuit. With the increase of coolant flow rate, more gas is brought into the liquid storage tank 10, thereby improving the degassing rate and accurately judging the completion of degassing.

[0062] The liquid addition and degassing device of the present invention includes a liquid storage tank 10, a first pipeline assembly 20, and a second pipeline assembly 30. The liquid storage tank 10 has a receiving cavity 11 for containing coolant. The coolant flows out of the receiving cavity 11 to the first pipeline assembly 20 and then flows into the cooling circuit from the inlet. The coolant carries the gas in the cooling circuit through the outlet and the second pipeline assembly 30 back to the receiving cavity 11. The gas carried by the coolant is discharged from the first exhaust port, completing the liquid addition and degassing of the cooling circuit. The liquid addition and degassing device of the present invention increases the flow rate of coolant through the cooling circuit by using the first pipeline assembly 20 and the second pipeline assembly 30, thereby increasing the amount of gas carried away by the coolant from the cooling circuit and improving the degassing rate. This solves the problem of long exhaust time in the cooling circuit of engines in the prior art and achieves a rapid degassing effect.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A liquid-adding and degassing device for adding liquid and degassing the cooling circuit of an engine system (1), characterized in that, The liquid addition and degassing device includes: The reservoir (10) has a receiving cavity (11) for containing coolant. The first pipeline assembly (20) has a first end connected to the receiving cavity (11) and a second end connected to the liquid inlet of the cooling circuit so that the coolant in the receiving cavity (11) enters the cooling circuit. The second pipeline assembly (30) has a first end connected to the outlet of the cooling circuit and a second end connected to the receiving cavity (11) so that the coolant in the cooling circuit flows back into the receiving cavity (11). The liquid storage tank (10) also has a first exhaust port connected to the receiving cavity (11) so that the gas in the cooling circuit flows through the second pipeline assembly (30) and is discharged from the first exhaust port; The first piping assembly (20) further includes: The second connecting pipe (21) has its first end connected to the receiving cavity (11) and its second end connected to the liquid inlet. The first pump body (22) is mounted on the second connecting pipe (21); The second pressure sensor (23) is disposed on the second connecting pipe (21) and located on the side of the first pump body (22) away from the first end of the second connecting pipe (21). The second pressure sensor (23) is used to detect the pressure of the inlet. The first control valve (24) is disposed on the second connecting pipe (21) and located on the side of the first pump body (22) near the liquid storage tank (10); The third connecting pipe (25) has its first end and second end connected to and in communication with the second connecting pipe (21) respectively. The first end of the third connecting pipe (25) is located on the side of the first control valve (24) near the liquid storage tank (10), and the second end of the third connecting pipe (25) is located between the first pump body (22) and the second pressure sensor (23). The second control valve (26) is installed on the third connecting pipe (25).

2. The liquid addition and degassing device according to claim 1, characterized in that, The engine system (1) includes a fuel cell, which has a coolant chamber, a hydrogen chamber, and an air chamber. The coolant chamber is disposed on the cooling circuit. The liquid addition and degassing device further includes: The third pipeline assembly (40) has a first end for introducing gas and a second end for connecting to both the hydrogen chamber and the air chamber, so that the third pipeline assembly (40) controls the gas pressure entering the hydrogen chamber and the air chamber.

3. The liquid addition and degassing device according to claim 1, characterized in that, The second piping assembly (30) includes: The first connecting pipe (31) has a first end connected to the outlet of the cooling circuit and a second end connected to the receiving cavity (11). At least a portion of the first connecting tube (31) is a transparent portion (311), which is made of a transparent material.

4. The liquid addition and degassing device according to claim 3, characterized in that, The second piping assembly (30) also includes: A first pressure sensor (32) is disposed on the first connecting pipe (31) and located between the transparent portion (311) and the first end of the first connecting pipe (31). The first pressure sensor (32) is used to detect the pressure of the liquid outlet; and / or, A first check valve (33) is disposed on the first connecting pipe (31) and located between the transparent part (311) and the second end of the first connecting pipe (31).

5. The liquid addition and degassing device according to claim 1, characterized in that, The first piping assembly (20) further includes: A second check valve (27) is disposed on the second connecting pipe (21) and located between the second pressure sensor (23) and the second end of the third connecting pipe (25); and / or, A flow meter (28) is disposed on the second connecting pipe (21) and located between the second pressure sensor (23) and the second end of the third connecting pipe (25).

6. The liquid addition and degassing device according to claim 2, characterized in that, The third piping assembly (40) also includes: The fourth connecting pipe (41) has a first end for introducing gas and a second end for connecting to both the hydrogen chamber and the air chamber. A pressure control valve assembly (42) is provided on the fourth connecting pipe (41) and located between the first end and the second end of the fourth connecting pipe (41) to control the gas pressure flowing out of the second end of the fourth connecting pipe (41) through the pressure control valve assembly (42); A third pressure sensor (43) is disposed on the fourth connecting pipe (41) and located on the side of the pressure control valve assembly (42) away from the first end of the fourth connecting pipe (41) to detect the gas pressure flowing out from the second end of the fourth connecting pipe (41).

7. The liquid addition and degassing device according to claim 6, characterized in that, The liquid addition and degassing device also includes: A pressure reducing valve (70) is disposed on the fourth connecting pipe (41) and located on the side of the pressure control valve assembly (42) near the first end of the fourth connecting pipe (41); The fourth pressure sensor (80) is disposed on the fourth connecting pipe (41) and located on the side of the pressure reducing valve (70) near the first end of the fourth connecting pipe (41); A filter (170) is disposed on the fourth connecting pipe (41) and located between the fourth pressure sensor (80) and the pressure reducing valve (70).

8. The liquid addition and degassing device according to any one of claims 1 to 7, characterized in that, The liquid addition and degassing device further includes a second pump body (50), a first liquid level sensor (60), and a second liquid level sensor (90). The second pump body (50) is connected to the receiving cavity (11) to deliver coolant into the receiving cavity (11). At least a portion of the first liquid level sensor (60) and at least a portion of the second liquid level sensor (90) are disposed within the receiving cavity (11). The first liquid level sensor (60) is disposed higher than the second liquid level sensor (90). When the second liquid level sensor (90) detects that the liquid level in the receiving cavity (11) is lower than its own, it controls the second pump body (50) to start. When the first liquid level sensor (60) detects that the liquid level in the receiving cavity (11) is higher than its own, it controls the second pump body (50) to stop operating. And / or, The liquid addition and degassing device further includes a conductivity meter (100), a third pump body (110), and a deionizer (120). At least a portion of the conductivity meter (100) is disposed within the receiving cavity (11) to detect the real-time conductivity of the coolant within the receiving cavity (11). Both the third pump body (110) and the deionizer (120) are disposed within the receiving cavity (11). The third pump body (110) is connected to the deionizer (120) to control the operation of the third pump body (110) when the conductivity meter (100) detects that the real-time conductivity is greater than a preset conductivity, so that the coolant circulates through the deionizer (120); and / or, The liquid addition and degassing device further includes a first quick-connect fitting (130), through which the second end of the first pipeline assembly (20) is detachably connected to the first end of the cooling circuit having the liquid inlet; and / or, The liquid addition and degassing device also includes a second quick-connect fitting (140), and the first end of the second pipeline assembly (30) is detachably connected to the second end of the cooling circuit having the liquid outlet through the second quick-connect fitting (140).

9. A testing system comprising a test bench for testing an engine system (1), characterized in that, The testing system further includes the liquid addition and degassing device as described in any one of claims 1 to 8.

10. The testing system according to claim 9, characterized in that, The test bench and the liquid addition and degassing device are set separately so that they can work independently.

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