Engine cooling system

Abstract

The utility model provides an engine cooling system, which relates to the field of engine cooling, and adopts the technical scheme that the engine cooling system comprises a radiator, the upper part of the radiator is communicated with a water inlet pipe, and the water inlet pipe is communicated with a water outlet of an engine. A two-way valve assembly is detachably arranged on the water injection seat, the two-way valve assembly is communicated with an overflow tank through a balance pipe on one side of the water injection seat, and an exhaust pipe is arranged on the upper portion of the overflow tank. On the basis that the cooling system has the functions of storing and supplementing cooling liquid and exhausting, occupied space is reduced, and arrangement and installation are flexible.

Description

Technical Field

[0001] The utility model relates to the field of engine cooling, in particular to an engine cooling system. Background Art

[0002] The engine cooling system is an important assembly that affects the performance of a car's engine. Its main function is to cool the engine body and the air entering the engine through the radiator and intercooler to ensure normal operation of the engine, improve fuel economy and vehicle operation stability; the expansion water tank (also called the replenishing tank or auxiliary water tank) in the engine cooling system is an important component, which plays multiple roles to ensure the normal operation of the cooling system; the expansion water tank has the functions of storing coolant, replenishing coolant, helping the cooling system to remove air and balance the pressure within the system.

[0003] In the prior art, the expansion tank is usually located at a higher position in the engine compartment and is connected to components such as the water pump and radiator through water pipes. Its interior is usually divided into two areas: one is the coolant storage area for storing and replenishing coolant, and the other is a steam chamber for accommodating steam and air generated by the expansion of the coolant due to the increase in temperature. When the cooling system is filled with coolant or in operation, air may enter the cooling system due to various reasons (such as poor system sealing, coolant evaporation, etc.). This air will circulate with the coolant and accumulate in the steam chamber of the expansion tank. Part of the coolant will evaporate into steam and rise into the steam chamber of the expansion tank due to the principle of thermal expansion and contraction. The design of the expansion tank allows steam and air to accumulate in the steam chamber and be discharged from the system through a specific exhaust device (such as an exhaust valve or exhaust pipe).

[0004] With the above technical solution, on the one hand, the expansion tank needs to be installed at a higher position in the engine compartment, and the installation position is relatively fixed, which affects the compatibility with various types of engines; on the other hand, the expansion tank is designed with a steam chamber for accommodating the steam and air generated by the expansion of the coolant temperature, which makes the expansion tank too large, greatly occupies the space in the engine compartment, affects the spatial layout of the engine compartment, and is inflexible to use. Utility Model Content

[0005] In order to solve the technical problem in the above-mentioned prior art that the expansion water tank of the cooling system occupies a large space and is inflexible in installation and use, the utility model provides an engine cooling system that can reduce space occupancy and be flexibly arranged and installed on the basis of the cooling system having the functions of storing and replenishing coolant and exhausting air.

[0006] In order to solve the above-mentioned technical problems, the utility model provides an engine cooling system, including a radiator, wherein the upper portion of the radiator is connected to a water inlet pipe, the water inlet pipe is connected to the water outlet of the engine, a water filling seat is provided on the water inlet pipe, a two-way valve assembly is detachably provided on the water filling seat, the two-way valve assembly is connected to an overflow tank through a balancing pipe on one side of the water filling seat, and an exhaust pipe is provided on the upper portion of the overflow tank.

[0007] The utility model uses an overflow tank and a two-way valve assembly to store excess coolant that expands the radiator due to temperature increase, and at the same time replenishes the coolant that is reduced due to volume contraction of the radiator due to temperature drop, thereby retaining the function of the original expansion tank. The two-way valve group is arranged at a high position in the entire cooling system and can exhaust air through the exhaust pipe of the overflow tank. There is no need to arrange the overflow tank at a high position, making the installation of the overflow tank more flexible. The exhaust pipe can discharge excess coolant, thereby eliminating the need to set up a larger overflow tank, reducing space occupancy, and improving the flexibility of the layout of the cooling system.

[0008] Furthermore, the balancing pipe is connected to a water supply pipe, and the water supply pipe is connected to the bottom of the overflow tank.

[0009] The utility model provides a water supply pipe at the bottom of the overflow tank, which can prevent external air from being sucked back to generate bubbles when replenishing the radiator coolant.

[0010] Furthermore, the water injection seat includes a valve cavity and a communicating cavity that are connected. The water injection seat is connected to the balancing pipe, and the two-way valve assembly is arranged in the valve cavity.

[0011] Furthermore, the two-way valve assembly includes a connected valve cover and a large tray, the valve cover is threadedly connected to the flange at the end of the water filling seat, an upper pressure plate is provided on the inner side of the valve cover, the large tray is located on the bottom surface of the valve cavity, a spring 1 is provided between the upper pressure plate and the large tray, a through hole is provided on the large tray, a valve column passes through the through hole, a spring 2 is provided between the upper end of the valve column and the upper surface of the large tray, the spring 2 is coaxially arranged with the spring, and a small tray is provided on the part of the lower end of the valve column that passes through the large tray, and the small tray abuts against the lower part of the large tray.

[0012] The utility model can realize the flow of coolant from the water inlet pipe to the balance pipe through the cooperation of the large tray and the first spring, and realize the liquid storage in the overflow tank. The utility model can realize the flow of coolant from the balance pipe to the water inlet pipe through the cooperation of the small tray and the second spring, and realize the liquid replenishment in the overflow tank. The action is sensitive and reliable.

[0013] Furthermore, a limiting cylinder is provided between the upper pressing plate and the large tray, the spring is provided on the limiting cylinder, and a liquid flow hole is provided on the limiting cylinder.

[0014] The utility model can limit the position of the spring 1 and prevent the spring from moving by arranging the limiting cylinder.

[0015] Furthermore, a sealing gasket 1 is provided on the lower surface of the large tray, and the sealing gasket 1 can abut against the bottom surface of the valve cavity; a sealing gasket 2 is provided on the lower surface of the upper pressure plate, and the sealing gasket 2 can abut against the upper end surface of the water filling seat.

[0016] The utility model improves the sealing performance of the two-way valve assembly by arranging the first sealing gasket and the second sealing gasket, thereby greatly reducing leakage.

[0017] Furthermore, along the direction in which the coolant flows to the overflow tank, the inner diameter of the balancing pipe gradually increases, and the end of the balancing pipe with a larger inner diameter is connected to the overflow tank.

[0018] The utility model can release air from the coolant flowing out of the radiator by gradually increasing the diameter of the balance pipe, thereby increasing the exhaust effect, and at the same time strengthens the connection strength between the balance pipe and the water filling seat to prevent breakage.

[0019] Furthermore, reinforcing ribs are provided in the overflow tank, and the reinforcing ribs are in a cross-shaped structure.

[0020] The utility model prevents the overflow tank from being deformed by arranging reinforcing ribs.

[0021] Furthermore, mounting brackets are respectively provided on both sides of the overflow tank, and the mounting brackets are used to be connected to the longitudinal beams of the frame.

[0022] The utility model installs the overflow tank on the vehicle frame, which reduces the space occupied by the engine compartment and facilitates the installation and arrangement of the engine and its accessories.

[0023] Furthermore, a liquid level scale line is provided on the overflow tank.

[0024] It can be seen from the above technical solutions that the present invention has the following advantages:

[0025] The utility model provides an engine cooling system, which can store excess coolant expanded by the radiator due to temperature increase through the overflow tank and the two-way valve assembly, and can replenish the coolant reduced by the radiator due to volume contraction due to temperature drop, retaining the function of the original expansion tank. The two-way valve group is arranged at a high position in the entire cooling system and can exhaust air through the exhaust pipe of the overflow tank, without the need to arrange the overflow tank at a high position, making the installation of the overflow tank more flexible. The exhaust pipe can discharge excess coolant, thereby eliminating the need to arrange a large overflow tank, reducing space occupation, and improving the layout flexibility of the cooling system; by arranging a water supply pipe at the bottom of the overflow tank, it can replenish the coolant when replenishing the radiator. The radiator cools the liquid by preventing the back-inhalation of external air and the generation of bubbles; through the cooperation of the large tray and spring one, the coolant can flow from the water inlet pipe to the balancing pipe, and the overflow tank can be stored; through the cooperation of the small tray and spring two, the coolant can enter the water inlet pipe from the balancing pipe, and the overflow tank can be replenished with liquid, with sensitive and reliable action; by setting the limit cylinder, the position of spring one can be limited to prevent it from moving; by setting sealing gasket one and sealing gasket two, the sealing performance of the two-way valve assembly can be improved, and leakage can be greatly reduced; by gradually increasing the diameter of the balancing pipe, the air in the coolant flowing out of the radiator can be precipitated, thereby increasing the exhaust effect, and at the same time, the connection strength between the balancing pipe and the water filling seat can be enhanced to prevent breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the assembly structure of a specific embodiment of the utility model and a vehicle frame.

[0028] Figure 2 It is a schematic diagram of the assembly structure of the two-way valve assembly and the water filling seat in a specific embodiment of the present utility model.

[0029] Figure 3 It is a structural schematic diagram of the overflow tank in a specific embodiment of the present utility model.

[0030] In the figure, 1. radiator; 2. water inlet pipe; 3. water filling seat; 4. two-way valve assembly; 7. water supply pipe; 10. overflow tank; 11. mounting bracket; 12. frame longitudinal beam; 101. mounting end ear; 102. exhaust pipe; 401. valve cover; 402. upper pressure plate; 403. sealing gasket 2; 404. spring 1; 405. limiting cylinder; 406. large tray; 407. spring 2; 408. sealing gasket 1; 409. small tray; 410. valve column; 411. bolt; 412. balance pipe; 413. connecting chamber; 414. valve chamber. DETAILED DESCRIPTION

[0031] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0032] like Figures 1 to 3 As shown, this specific embodiment provides an engine cooling system, including a radiator 1, a water inlet pipe 2 is connected to the upper part of the radiator 1, the water inlet pipe 2 is connected to the water outlet of the engine, a water filling seat 3 is provided on the water inlet pipe 2, a two-way valve assembly 4 is detachably provided on the water filling seat 3, the two-way valve assembly 4 is connected to the overflow tank 10 through a balance pipe 412 on one side of the water filling seat 3, and an exhaust pipe 102 is provided on the upper part of the overflow tank 10; in this specific embodiment, the water filling seat 3 includes a connected valve cavity 414 and a connecting cavity 413, the water filling seat 3 is connected to the balance pipe 412, and the two-way valve assembly 4 is provided in the valve cavity 414.

[0033] This specific embodiment uses the overflow tank 10 and the two-way valve assembly 4 to store excess coolant that expands the radiator 1 due to temperature increase, and at the same time replenish the coolant that is reduced due to volume contraction of the radiator 1 due to temperature drop, retaining the function of the original expansion tank, and setting the two-way valve group at a high position in the entire cooling system, which can be exhausted through the exhaust pipe 102 of the overflow tank 10, without the need to set the overflow tank 10 at a high position, making the installation of the overflow tank 10 more flexible, and the exhaust pipe 102 can discharge excess coolant, thereby eliminating the need to set a larger overflow tank 10, reducing space occupancy, and improving the flexibility of the layout of the cooling system.

[0034] like Figure 2As shown, when the temperature of the radiator 1 drops, the coolant in the overflow tank 10 will be sucked back. In order to avoid the inhalation of air, in this specific embodiment, the balance pipe 412 is connected to the water supply pipe 7, and the water supply pipe 7 is connected to the bottom of the overflow tank 10. When back-sucking, only the coolant is sucked back and no air will enter.

[0035] like Figure 2 As shown, the two-way valve assembly 4 can adopt a two-way pneumatic valve, which includes a pneumatic actuator. Under the action of the control system, the coolant flow direction can be changed according to the pressure changes at both ends (pressure sensor is required to cooperate) to realize the storage and replenishment of the coolant. Figure 2 As shown, in this specific embodiment, in order to improve the sensitivity and reliability of the two-way valve assembly 4 and reduce costs, the two-way valve assembly 4 includes a valve cover 401 and a large tray 406 connected to each other. The valve cover 401 is threadedly connected to the flange at the end of the water injection seat 3. After the valve cover 401 is unscrewed, the entire two-way valve assembly 4 can be unscrewed and the coolant can be injected. An upper pressure plate 402 is provided on the inner side of the valve cover 401, and the large tray 406 is located on the bottom surface of the valve cavity 414. The upper pressure plate 402 A spring 1 404 is provided between the large tray 406 and the large tray 406. A through hole is provided on the large tray 406. A valve post 410 passes through the through hole. A spring 2 407 is provided between the upper end of the valve post 410 and the upper surface of the large tray 406. The spring 2 407 is coaxially arranged with the spring 1 404. A small tray 409 is provided at the part where the lower end of the valve post 410 passes through the large tray 406. The small tray 409 abuts against the lower part of the large tray 406. Through the cooperation of the large tray 406 and the spring 1 404, it can The coolant is circulated from the water inlet pipe 2 to the balance pipe 412, and the overflow tank 10 is stored. The small tray 409 and the spring 2 407 cooperate to allow the coolant to enter the water inlet pipe 2 from the balance pipe 412, and the overflow tank 10 is replenished with liquid. The action is sensitive and reliable. A limiting cylinder 405 is also provided between the upper pressure plate 402 and the large tray 406. The spring 1 404 is sleeved on the limiting cylinder 405. The limiting cylinder 405 is provided with a flow hole. By setting the limiting cylinder 405, it can be limited. The position of the fixed spring 404 is prevented from moving; in order to improve the sealing performance of the two-way valve assembly 4, a sealing gasket 408 is provided on the lower surface of the large tray 406, and the sealing gasket 408 can abut against the bottom surface of the valve cavity 414, and a sealing gasket 403 is provided on the lower surface of the upper pressure plate 402, and the sealing gasket 403 can abut against the upper end surface of the water injection seat 3; in this specific embodiment, the valve cover 401, the upper pressure plate 402 and the limit cylinder 405 are connected by bolts 411.

[0036] like Figure 2As shown, in order to be able to precipitate more air in the coolant flowing out of the radiator 1, in this specific embodiment, the inner diameter of the balancing pipe 412 gradually increases along the direction of the coolant flowing to the overflow tank 10, and the end of the balancing pipe 412 with a larger inner diameter is connected to the overflow tank 10; at the same time, the connection strength between the balancing pipe 412 and the water filling seat 3 is enhanced to prevent breakage.

[0037] like Figure 3 As shown, in order to prevent the overflow tank 10 from deforming, reinforcing ribs are provided in the overflow tank 10, and the reinforcing ribs are in a cross-shaped structure; mounting brackets 11 are provided on both sides of the overflow tank 10 through mounting end ears 101, and the mounting brackets 11 are used to connect with the frame longitudinal beams 12. Installing the overflow tank 10 on the frame reduces the space occupied by the engine compartment and facilitates the installation and arrangement of the engine and its accessories; liquid level scale lines are provided on the overflow tank 10, including the highest liquid level scale lines and the lowest liquid level scale lines.

[0038] The working process of this engine cooling system is:

[0039] When the temperature of the coolant in the radiator 1 is high, the pressure in the water inlet pipe 2 is high, which causes the spring 404 to contract and the large tray 406 to move up, and a gap is formed between the sealing gasket 408 and the valve chamber 414. The coolant enters the bottom of the overflow tank 10 from the valve chamber 414, the balancing pipe 412 and the water supply pipe 7 in turn. At the same time, the precipitated air enters the overflow tank 10 and floats up to be discharged from the exhaust pipe 102. When more coolant enters, the excess coolant is discharged from the exhaust pipe 102; when the temperature of the radiator 1 drops and back suction occurs, the spring 404 is compressed and the small tray 409 moves down, and a gap is formed between the small tray 409 and the sealing gasket 408. The coolant passes through the water supply pipe 7, the balancing pipe 412, the valve chamber 414, the flow hole, the through hole, and the connecting chamber 413 in turn into the water inlet pipe 2, and enters the radiator 1 to replenish the coolant.

[0040] From the above specific embodiments, it can be seen that the present invention has the following beneficial effects:

[0041] 1. The overflow tank 10 and the two-way valve assembly 4 can store excess coolant caused by expansion of the radiator 1 due to temperature increase, and can also replenish coolant lost due to volume contraction of the radiator 1 due to temperature drop, thus retaining the function of the original expansion tank. The two-way valve assembly is arranged at a high position in the entire cooling system and can exhaust air through the exhaust pipe 102 of the overflow tank 10. There is no need to arrange the overflow tank 10 at a high position, making the installation of the overflow tank 10 more flexible. The exhaust pipe 102 can discharge excess coolant, thereby eliminating the need for a large overflow tank 10, reducing space occupation, and improving the layout flexibility of the cooling system.

[0042] 2. By providing a water supply pipe 7 at the bottom of the overflow tank 10, it is possible to prevent external air from being sucked back and generating bubbles when replenishing the coolant in the radiator 1;

[0043] 3. The large tray 406 and spring 1 404 work together to allow coolant to flow from the water inlet pipe 2 to the balancing pipe 412, thereby storing liquid in the overflow tank 10. The small tray 409 and spring 2 407 work together to allow coolant to flow from the balancing pipe 412 to the water inlet pipe 2, thereby replenishing the overflow tank 10. This is a sensitive and reliable operation.

[0044] 4. By providing a limiting cylinder 405, the position of spring 1 404 can be limited to prevent it from moving;

[0045] 5. The sealing performance of the two-way valve assembly 4 is improved by providing the sealing gasket 1 408 and the sealing gasket 2 403, which greatly reduces leakage;

[0046] 6. By gradually increasing the diameter of the balancing pipe 412, air in the coolant flowing out of the radiator 1 can be precipitated, thereby increasing the exhaust effect. At the same time, the connection strength between the balancing pipe 412 and the water filling seat 3 is enhanced to prevent breakage.

[0047] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine cooling system, comprising a radiator (1), wherein the upper portion of the radiator (1) is connected to a water inlet pipe (2), and the water inlet pipe (2) is connected to a water outlet of the engine, characterized in that: A water filling seat (3) is provided on the water inlet pipe (2), a two-way valve assembly (4) is detachably provided on the water filling seat (3), the two-way valve assembly (4) is connected to an overflow tank (10) through a balance pipe (412) on one side of the water filling seat (3), and an exhaust pipe (102) is provided on the upper part of the overflow tank (10).

2. The engine cooling system according to claim 1, wherein: The balancing pipe (412) is connected to a water supply pipe (7), and the water supply pipe (7) is connected to the bottom of the overflow tank (10).

3. The engine cooling system according to claim 2, wherein: The water injection seat (3) comprises a valve cavity (414) and a communication cavity (413) that are connected. The water injection seat (3) is connected to the balance pipe (412), and the two-way valve assembly (4) is arranged in the valve cavity (414).

4. The engine cooling system according to claim 3, wherein: The two-way valve assembly (4) includes a valve cover (401) and a large tray (406) connected to each other. The valve cover (401) is threadedly connected to the flange at the end of the water injection seat (3). An upper pressure plate (402) is provided on the inner side of the valve cover (401). The large tray (406) is located on the bottom surface of the valve cavity (414). A spring (404) is provided between the upper pressure plate (402) and the large tray (406). The large tray (4 06) is provided with a through hole, and a valve column (410) passes through the through hole, and a spring 2 (407) is provided between the upper end of the valve column (410) and the upper surface of the large tray (406), and the spring 2 (407) is coaxially arranged with the spring 1 (404), and a small tray (409) is provided at the part of the lower end of the valve column (410) that passes through the large tray (406), and the small tray (409) abuts against the lower part of the large tray (406).

5. The engine cooling system according to claim 4, wherein: A limiting cylinder (405) is further provided between the upper pressing plate (402) and the large tray (406), the spring 1 (404) is sleeved on the limiting cylinder (405), and a liquid flow hole is provided on the limiting cylinder (405).

6. The engine cooling system according to claim 5, wherein: The lower surface of the large tray (406) is provided with a sealing gasket 1 (408), and the sealing gasket 1 (408) can abut against the bottom surface of the valve cavity (414). The lower surface of the upper pressure plate (402) is provided with a sealing gasket 2 (403), and the sealing gasket 2 (403) can abut against the upper end surface of the water injection seat (3).

7. The engine cooling system according to claim 1, wherein: Along the direction in which the coolant flows to the overflow tank (10), the inner diameter of the balance pipe (412) gradually increases, and the end of the balance pipe (412) with the larger inner diameter is connected to the overflow tank (10).

8. The engine cooling system according to any one of claims 1 to 7, characterized in that: Reinforcement ribs are provided in the overflow tank (10), and the reinforcement ribs are in a cross-shaped structure.

9. The engine cooling system according to claim 8, wherein: Mounting brackets (11) are respectively provided on both sides of the overflow tank (10), and the mounting brackets (11) are used to be connected to the longitudinal beams of the vehicle frame.

10. The engine cooling system according to claim 8, wherein: The overflow tank (10) is provided with a liquid level scale line.

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