Degassing device applied to vehicle cooling system

Abstract

The utility model provides a degassing device applied to a vehicle cooling system, and relates to the technical field of vehicles. The degassing device comprises a ventilation door, the ventilation door comprises a main body pipe and a ventilation pipe connected with the side wall of the main body pipe, a large-diameter pipe opening is formed in the end of the main body pipe, the ventilation pipe is connected with the main body pipe in an included angle mode, the ventilation pipe is communicated with the main body pipe, and a small-diameter pipe opening is formed in the end, away from the main body pipe, of the ventilation pipe. The caliber of the large-diameter pipe opening is larger than or equal to that of the small-diameter pipe opening. According to the technical scheme, the large-diameter pipe opening is communicated with the cooling loop of the vehicle cooling system, and according to the Bernoulli equation principle, when it is judged that gas exists in the cooling loop according to the detected flow speed of fluid in the main pipe and the fluid direction of fluid in the cooling loop, the gas in the cooling loop is discharged. And residual gas in the cooling system can be removed by plugging or inflating the small-diameter pipe orifice of the breather pipe, so that the influence on the heat transfer performance of the system or some important parts is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a degassing device applied to a vehicle cooling system. Background Art

[0002] The current cooling system of new energy vehicles is more complex than that of traditional vehicles, and often includes many circuits, such as engine cooling circuit, motor circuit, battery circuit, heater circuit, etc. The coolant circulation in the entire system is often powered by multiple water pumps. However, during the flow of coolant, some bubbles will inevitably be generated, and the presence of bubbles will affect the operation of water pumps, water valves, etc.

[0003] Under certain specific working conditions, such as the early stage of vehicle verification, there is no factory filling machine to help with vacuum filling. In order to avoid the water pump idling, an idling threshold is often set. If the volume of the bubbles exceeds the water pump idling threshold, it is very easy for the water pump to issue a fault feedback and stop working; secondly, if there are bubbles in the entire system, it is also easy for the filling liquid to be insufficient, resulting in poor flow of coolant in local pipes, reduced heat transfer coefficient, and affecting the system's heat exchange performance; in addition, for hybrid models, the air expands rapidly due to heat, which can easily cause cavitation of the engine cylinder liner, leading to premature cracks or leakage in the cylinder liner, and the resulting pressure difference can easily lead to coolant leakage.

[0004] In addition, during the vehicle verification phase, high efficiency is often emphasized. If there is gas in the system, each pipeline needs to be checked when a problem occurs. If the gas in the pipeline is simply cleared by the water pump power circulation, it often takes a long time, and the gas in some positions cannot be completely discharged, resulting in slow test progress. For various experimental verifications, such as flow rate, coolant filling amount, etc., if there is gas in the system, the experimental results often deviate from the actual value, which brings problems to subsequent work.

[0005] Therefore, in the early experimental verification stage, the locations in the system where gas is likely to accumulate should also be vented to avoid unnecessary failures that affect the experimental rhythm.

[0006] No effective solutions have been proposed for the above technical problems. Utility Model Content

[0007] The main purpose of the utility model is to provide a degassing device for a vehicle cooling system, so as to solve the problem in the prior art that the cooling system cannot be quickly vented during the early verification stage of the entire vehicle.

[0008] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a degassing device applied to a vehicle cooling system is provided, including: a vent valve, the vent valve includes a main pipe and a vent pipe connected to the side wall of the main pipe, the end of the main pipe forms a large-diameter pipe opening, the vent pipe is connected to the main pipe at an angle, and the vent pipe is connected to the main pipe, and a small-diameter pipe opening is formed at the end of the vent pipe away from the main pipe, wherein the diameter of the large-diameter pipe opening is greater than or equal to the diameter of the small-diameter pipe opening, and the large-diameter pipe opening is used to be connected to any cooling circuit of the vehicle cooling system.

[0009] Furthermore, there are two ventilation pipes, which are spaced apart along the axial direction of the main pipe.

[0010] Furthermore, along the axial direction of the main tube, the main tube includes a first large diameter section, a small diameter section and a second large diameter section arranged in sequence, the end of the first large diameter section and the end of the second large diameter section each form a large diameter pipe opening, the pipe diameter of the small diameter section is smaller than the pipe diameter of the first large diameter section and the pipe diameter of the second large diameter section, and a ventilation pipe is each provided on the side wall of the first large diameter section and the side wall of the small diameter section.

[0011] Furthermore, a diameter-reducing section is provided between the first large-diameter section and the small-diameter section, and the diameter of the diameter-reducing section is gradually reduced in the direction from the first large-diameter section to the second large-diameter section.

[0012] Furthermore, the diameter of the first large diameter section is D1, the diameter of the second large diameter section is D2, wherein 11.5mm≤D1≤16.5mm, 11.5mm≤D2≤16.5mm, and / or, the diameter of the ventilation pipe is d1, the diameter of the small diameter section is d2, wherein 6.5mm≤d1<11.5mm, 6.5mm≤d2<11.5mm.

[0013] Furthermore, the two ventilation pipes are arranged on the same side of the main pipe.

[0014] Furthermore, the two ventilation pipes are arranged in parallel.

[0015] Furthermore, the diameters of the two ventilation pipes are set to be the same.

[0016] Furthermore, the degassing device further comprises: a flow meter, which is used to detect the flow rate at a position where at least one large-diameter pipe opening of the vent valve is located.

[0017] Furthermore, the degassing device also includes: an air pump, which is connected to any small-diameter pipe opening.

[0018] The technical scheme of the utility model discloses, through the preliminary judgment that the cooling circuit pipeline exists gas (the pipeline that exists gas is easy to change through exerting external force), the large diameter pipe mouth is connected with the cooling circuit of the vehicle cooling system, according to Bernoulli equation principle, the relationship of pipe diameter and flow velocity and pressure can be transformed, the flow velocity in the main body pipe is detected whether the gas exists in the cooling circuit, when judging that the gas exists in the cooling circuit according to the fluid flow velocity of two large diameter pipe mouth and the flow direction in the cooling circuit, the residual gas in the cooling system can be removed through the plugging or inflation of the small diameter pipe mouth of the breather pipe, the system heat transfer performance is avoided to be influenced or some important components are influenced, the whole vehicle is caused to have major accident. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof, to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 The structure schematic view of the first embodiment of the degassing device according to the utility model is shown;

[0021] Figure 2 The structure schematic view of the second embodiment of the degassing device according to the utility model is shown;

[0022] Figure 3 The structure schematic view of the embodiment of the degassing device according to the utility model is shown.

[0023] Among them, the above drawing includes the following figure marks:

[0024] 1, the inflator;

[0025] 2, the breather door; 21, the main body pipe; 210, the large diameter pipe mouth; 211, the first large diameter section; 212, the small diameter section; 213, the second large diameter section; 214, the reducing section; 22, the breather pipe; 220, the small diameter pipe mouth;

[0026] 3, the flowmeter; 4, the radiator; 5, the expansion tank; 6, the intercooler; 7, the motor oil cooler; 8, the front motor inverter; 9, the rear motor inverter. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0031] Combine Figures 1 to 2 As shown, according to a specific embodiment of the present application, a degassing device applied to a vehicle cooling system is provided.

[0032] Specifically, if Figure 1 As shown, the degassing device used in the vehicle cooling system includes a vent valve 2, which includes a main tube 21 and a vent pipe 22 connected to the side wall of the main tube 21, the end of the main tube 21 forms a large-diameter pipe opening 210, the vent pipe 22 is connected to the main tube 21 at an angle, and the vent pipe 22 is connected to the main tube 21, and the vent pipe 22 is connected to the main tube 21, and the end of the vent pipe 22 away from the main tube 21 forms a small-diameter pipe opening 220, wherein the diameter of the large-diameter pipe opening 210 is greater than or equal to the diameter of the small-diameter pipe opening 220, and the large-diameter pipe opening 210 is used to be connected to any cooling circuit of the vehicle cooling system.

[0033] By applying the technical solution of this embodiment, it is preliminarily determined that there is gas in the cooling circuit pipeline (a pipeline with gas is easily deformed by applying external force), and the large-diameter pipe mouth 210 is connected to the cooling circuit of the vehicle cooling system. According to the principle of Bernoulli's equation, the relationship between pipe diameter, flow rate and pressure can be converted, and the presence of gas in the cooling circuit can be detected by the flow rate in the main pipe 21. When it is determined that there is gas in the cooling circuit based on the fluid flow rate at the two large-diameter pipe mouths 210 detected and the flow direction in the cooling circuit, the remaining gas in the cooling system can be removed by blocking or pumping air into the small-diameter pipe mouth 220 of the ventilation pipe 22, so as to avoid affecting the heat transfer performance of the system or affecting some important components, which may cause a major accident to the entire vehicle.

[0034] Specifically, in this embodiment, Figure 1 、 Figure 2 As shown, there are two vent pipes 22, which are spaced apart along the axial direction of the main tube 21. The use of two vent pipes 22 allows the presence of gas in the cooling system pipes on both sides of the main tube 21 to be determined by the difference in flow rate and fluid flow direction. The cooling system pipes can then be vented by blocking or pumping air into the different vent pipes 22.

[0035] Furthermore, if Figure 1 As shown, along the axial direction of the main tube 21, the main tube 21 includes a first large diameter section 211, a small diameter section 212, and a second large diameter section 213, which are arranged in sequence. The ends of the first large diameter section 211 and the second large diameter section 213 each form a large diameter pipe opening 210. The diameter of the small diameter section 212 is smaller than the diameters of the first large diameter section 211 and the second large diameter section 213. A vent 22 is provided on the sidewalls of the first large diameter section 211 and the sidewalls of the small diameter section 212. The first large diameter section 211 and the second large diameter section 213 are provided with different diameters than the small diameter section 212. Since the diameter sections are interconnected, the small diameter pipe opening 220 can be selectively blocked or connected to the air pump 1 to perform different degassing operations as needed due to the varying diameters.

[0036] In this embodiment, a first large diameter section 211, a small diameter section 212, and a second large diameter section 213 having different pipe diameters are provided to facilitate the flow of fluid in the cooling circuit. That is, compared with the setting in which the pipe diameter remains constant, the setting in which the pipe diameter changes can improve the flow efficiency of the fluid in the pipe, avoid the problems of slow fluid flow and poor circulation caused by fluid retention in the pipe, and improve the detection efficiency.

[0037] Specifically, if Figure 1As shown, a reducing section 214 is provided between the first large diameter section 211 and the small diameter section 212. The diameter of the reducing section 214 gradually decreases as it moves from the first large diameter section 211 to the second large diameter section 213. In this embodiment, the reducing section 214 provides a transition between the first large diameter section 211 and the small diameter section 212. This transition prevents eddies and turbulence from forming in the suddenly narrowed portion of the fluid as it passes from the large diameter section to the small diameter section, which could lead to energy loss and increased resistance.

[0038] Optionally, the diameter of the first large-diameter section 211 is D1, and the diameter of the second large-diameter section 213 is D2, wherein 11.5 mm ≤ D1 ≤ 16.5 mm, and 11.5 mm ≤ D2 ≤ 16.5 mm.

[0039] Optionally, the diameter of the vent pipe 22 is d1, and the diameter of the small-diameter section 212 is d2, wherein 6.5 mm ≤ d1 < 11.5 mm, and 6.5 mm ≤ d2 < 11.5 mm.

[0040] In this embodiment, the first and second large-diameter sections 211 and 213 are larger than the vent pipe 22 and the small-diameter section 212. The sizes can be adjusted as needed. For example, the diameters of the first and second large-diameter sections are the same as those of the cooling system pipes. Preferably, D1 = D2 = 14 mm, d1 = d2 = 9 mm, and the cooling system pipes have a diameter of 14 mm.

[0041] Optionally, the two vent pipes 22 are arranged on the same side of the main pipe 21. In this way, when the cooling system pipeline exhaust operation is performed, the two vent pipes 22 can be inflated or blocked on the same side of the main pipe 21, which is convenient to operate.

[0042] In one embodiment of the present application, Figure 1 、 Figure 2 As shown, the two vent pipes 22 are arranged in parallel and have the same diameter. Therefore, when both vent pipes 22 are pumped, since the two vent pipes 22 have the same diameter and are parallel to each other, when the two vent pipes 22 are pumped at the same rate and flow rate, the same amount of air is ensured to enter the two vent pipes 22, achieving stable degassing of the cooling system pipeline. Preferably, the two vent pipes 22 are arranged perpendicular to the main pipe 21. Given the predetermined diameter of the vent pipes 22, the gas pumped into the vent pipes 22 can flow quickly into the main pipe 21, improving degassing efficiency.

[0043] Furthermore, if Figure 3As shown, the degassing device also includes a flowmeter 3, which is used to detect the flow rate at the location of at least one large-diameter pipe opening 210 of the vent valve 2. The flowmeter 3 and the vent valve 2 are connected to the cooling system pipeline. By connecting the flowmeter 3 to one of the large-diameter pipe openings 210, the flow rate at the location of the large-diameter pipe opening 210 is detected. Based on the principle of the Bernoulli equation, the pipe diameter flow rate and flow direction can be calculated in combination with the pipe diameter, making it easier to determine whether there is gas in the cooling system pipeline at this location.

[0044] Furthermore, the degassing device further includes an air pump 1, which is connected to any one of the small-diameter pipe openings 220. There are multiple air pumps 1, and any one of the small-diameter pipe openings 220 can be inflated according to different degassing needs. The air pump 1 and the small-diameter pipe opening 220 are detachably connected, and the small-diameter pipe opening 220 can be sealed or inflated as needed.

[0045] The working principle and installation steps of the degassing device applied to the vehicle cooling system of this application are as follows:

[0046] like Figure 3 As shown in the experiment of new energy hybrid vehicle, the common parts of the cooling system motor circuit are radiator 4, water pump (i.e. Figure 3 As shown in the figure, ECP1 (ECP stands for Electric Cooling Pump), expansion tank 5, intercooler 6, motor oil cooler 7, front motor inverter 8, rear motor inverter 9, DCDC (Direct Current to Direct Current), etc., the cooling pipeline has many connecting parts and the pipeline is complicated. In this case, during the coolant filling process, it is very easy for air to accumulate in the pipeline. Figure 3 Take the example of gas existing in the pipeline connecting the vent valve 2 and the flow meter 3, and connect a degassing device here.

[0047] The degassing device mainly includes an air pump 1, a vent valve 2 and a flow meter 3. The vent valve 2 is a variable diameter four-way structure. According to the principle of Bernoulli equation, in the same section of pipeline, the sum of the kinetic energy, potential energy and pressure potential energy of the unit volume of fluid is a fixed constant. The greater the kinetic energy, the smaller the pressure potential energy. According to the continuity equation, the flow rate of the fluid is directly related to the pipe diameter, that is, the larger the pipe diameter, the smaller the flow rate, which is inversely proportional. Using the principle of Bernoulli equation, the relationship between pipe diameter, flow rate and pressure can be converted, such as Figure 1 As shown, the vent door 2 is divided into two large-diameter pipe openings 210 and two small-diameter pipe openings 220, wherein the diameter of the two large-diameter pipe openings 210 is 14 mm, the diameter of the two small-diameter pipe openings 220 is 9 mm, and the diameters of the remaining pipes are both 14 mm and 9 mm.

[0048] like Figure 1As shown, a large-diameter pipe opening 210 near the first large-diameter section 211 faces the water pump, while two small-diameter pipe openings 220 serve as direct connections to the air pump 1. These openings are connected as needed, with the unneeded openings sealed. Due to the inherent characteristics of the reducer, degassing can be performed without the air pump 1 in some cases. The two large-diameter pipe openings 210 connect to the degassing hose, and a flow meter 3 can be connected before or after the vent valve 2 as needed. The flow meter 3 is directly connected to a computer and can determine the flow rate based on the pipeline flow rate. The greater the flow rate, the greater the flow rate.

[0049] like Figure 3 As shown, the motor circuit flow of the cooling system is about 20L / min. If the flow meter 3 shows greater than or equal to 20L / min, it can be considered that the fluid flow rate here is very large and there is no gas. Gas is stored in the front of the vent door 2 (i.e., the side where the water pump is located). The fluid flow rate at the gas storage location must be small, that is, the flow rate of the large diameter pipe opening 210 close to the first large diameter section 211 is smaller than that of the other large diameter pipe openings 210. According to the principle of Bernoulli's equation, the large diameter pipe opening 210 with a small flow rate has a large pressure. The flow direction of the fluid is from the first large diameter section 211 to the second large diameter section 213. System schematic diagram, the water flow direction is the direction of the water pump, which is opposite to the flow direction of the fluid in the vent valve 2. If there is gas, the water pump will inevitably be at risk of idling. At this time, a small-diameter pipe opening 220 near the first large-diameter section 211 can be blocked, and air can be pumped into the other small-diameter pipe opening 220 to increase the pressure of the vent pipe 22, so that the fluid flows toward the air mass and breaks open the air mass; if the system water flow direction is consistent with the flow direction in the vent valve 2, the structural characteristics of the reducer itself can be relied upon to block the two small-diameter pipe openings 220, pushing the fluid from the high-pressure thick pipe to the low-pressure suction pipe.

[0050] On the contrary, if the flow rate is much less than 20L / min, there must be gas in this part, and the flow direction in the reducer is opposite to it. At this time, the small-diameter pipe opening 220 near the second large-diameter section 213 can be blocked, and air can be pumped from the other small-diameter pipe opening 220 to flush out the air mass. If the system flow direction is consistent with the flow direction in the reducer, then the two small-diameter pipe openings 220 can be blocked.

[0051] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0052] 1) The degassing device used in the vehicle cooling system is used to degas the cooling system pipeline. It is easy to operate and uses simple tools, which can greatly improve the cooling system experimental efficiency and result accuracy.

[0053] 2) Discharging the gas in the cooling system pipeline can avoid failure of some components due to gas accumulation and provide good heat exchange performance for the cooling system.

[0054] 3) It can ensure the working temperature of each water-cooled component, and avoid the motor battery temperature being too high due to gas in the coolant, working imbalance, or engine cylinder damage, which may lead to serious accidents of the entire vehicle.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0056] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as being included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also fall within the scope of the present invention.

[0057] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A degassing device for a vehicle cooling system, characterized in that: include: A vent valve (2), the vent valve (2) comprising a main body tube (21) and a vent pipe (22) connected to a side wall of the main body tube (21), the end of the main body tube (21) forming a large diameter pipe opening (210), the vent pipe (22) and the main body tube (21) being connected at an angle, and the vent pipe (22) and the main body tube (21) being connected, and the end of the vent pipe (22) away from the main body tube (21) forming a small diameter pipe opening (220), wherein the diameter of the large diameter pipe opening (210) is greater than or equal to the diameter of the small diameter pipe opening (220), and the large diameter pipe opening (210) is used for being connected to any cooling circuit of a vehicle cooling system.

2. The degassing device according to claim 1, characterized in that There are two vent pipes (22), and the two vent pipes (22) are spaced apart along the axial direction of the main body pipe (21).

3. The degassing device according to claim 2, characterized in that Along the axial direction of the main body tube (21), the main body tube (21) comprises a first large diameter section (211), a small diameter section (212) and a second large diameter section (213) which are arranged in sequence; the ends of the first large diameter section (211) and the ends of the second large diameter section (213) respectively form the large diameter pipe opening (210); the pipe diameter of the small diameter section (212) is smaller than the pipe diameters of the first large diameter section (211) and the second large diameter section (213); and the side walls of the first large diameter section (211) and the side walls of the small diameter section (212) are each provided with a ventilation pipe (22).

4. The degassing device according to claim 3, characterized in that A diameter-reducing section (214) is provided between the first large-diameter section (211) and the small-diameter section (212), and the diameter of the diameter-reducing section (214) is gradually reduced in the direction from the first large-diameter section (211) to the second large-diameter section (213).

5. The degassing device according to claim 3, characterized in that The diameter of the first large-diameter section (211) is D1, the diameter of the second large-diameter section (213) is D2, wherein 11.5 mm ≤ D1 ≤ 16.5 mm, 11.5 mm ≤ D2 ≤ 16.5 mm, and / or the diameter of the vent pipe (22) is d1, the diameter of the small-diameter section (212) is d2, wherein 6.5 mm ≤ d1 < 11.5 mm, 6.5 mm ≤ d2 < 11.5 mm.

6. The degassing device according to claim 2, characterized in that The two ventilation pipes (22) are arranged on the same side of the main body pipe (21).

7. The degassing device according to claim 2, characterized in that: The two ventilation pipes (22) are arranged in parallel.

8. The degassing device according to claim 2, characterized in that: The two ventilation pipes (22) are arranged to have the same diameter.

9. The degassing device according to any one of claims 1 to 8, characterized in that: The degassing device also includes: A flow meter (3) is used to detect the flow rate at a location where at least one of the large-diameter pipe openings (210) of the vent valve (2) is located.

10. The degassing device according to any one of claims 1 to 8, characterized in that: The degassing device also includes: An air pump (1), wherein the air pump (1) is connected to any one of the small-diameter pipe openings (220).

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