Engine degassing device and engineering machine
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIUGONG CHANGZHOU MACHINERY
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, engine coolant maintains a low temperature at low temperatures, affecting the rate at which the coolant heats up, resulting in poor air conditioning heating performance.
A three-way valve is introduced into the engine degassing device. By diverting the flow and adjusting the diameter of the return water pipe, the amount of coolant flowing into the radiator is reduced, while the amount of coolant flowing directly back to the engine through the return water pipe is increased. The coolant circulation path is controlled by the reservoir and pressure cap, thereby improving the coolant heating efficiency.
It enables rapid heating of coolant under low-temperature conditions to meet the heating requirements of air conditioning, thereby improving the heating rate of coolant and the heating effect of air conditioning.
Smart Images
Figure CN224413766U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering machinery technology, and in particular to an engine degassing device and engineering machinery. Background Technology
[0002] In existing technology, engines are equipped with EGR (Exhaust Gas Recirculation). During operation, the EGR produces gases that can affect engine performance; therefore, these gases need to be expelled. The EGR system has a vent port connected to a vent pipe. See also... Figure 2 The existing engine degassing device includes the existing engine (12), the existing EGR degassing pipe (13), and the existing radiator (14).
[0003] Before the coolant temperature reaches the thermostat opening temperature, the coolant circulation of the existing engine (12) does not pass through the existing radiator (14). However, some low-temperature coolant will enter the upper water chamber of the existing radiator (14) through the existing EGR degassing pipe (13), and then flow back to the existing engine (12) from the bottom of the existing radiator (14). This causes the coolant temperature to remain at a low level, which seriously affects the coolant heating rate.
[0004] Air conditioning heating is achieved through the circulation of engine coolant. If the coolant remains at a low temperature for an extended period, the air conditioning heating effect will be poor and will not meet the design requirements. Utility Model Content
[0005] The purpose of this invention is to provide an engine degassing device and engineering machinery to solve the technical problem that the coolant temperature is always kept at a low level in the prior art, which seriously affects the coolant heating rate.
[0006] To achieve the above objectives, the present invention provides an engine degassing device, comprising an engine equipped with an EGR (Electronic Gas Regulator), an EGR with a degassing port, one end of a degassing pipe connected to the degassing port, the other end of a degassing pipe connected to a first port of a three-way valve, a second port of the three-way valve connected to one end of a first return water pipe, the other end of the first return water pipe connected to a radiator, an engine inlet water pipe connected to the radiator, a third port of the three-way valve connected to one end of a second return water pipe, and the other end of the second return water pipe connected to the engine inlet water pipe.
[0007] Furthermore, the degassing pipe, the first return water pipe, and the second return water pipe are all flexible hoses.
[0008] Furthermore, the radiator and the kettle are connected by a connecting pipe, and the kettle is in contact with the atmosphere.
[0009] Furthermore, the radiator is provided with a pressure cap, and one end of the connecting pipe is connected to the pressure cap.
[0010] Furthermore, the pressure cap is disposed on the top of the radiator, the kettle is disposed on one side of the radiator, the horizontal center line of the kettle is lower than the horizontal center line of the pressure cap, and the other end of the connecting pipe is connected to the bottom of the kettle.
[0011] Furthermore, the engine is equipped with an engine water outlet pipe, and the radiator is connected to the engine water outlet pipe.
[0012] Furthermore, the engine water outlet pipe is connected to the top of the radiator, and the engine water inlet pipe is connected to the bottom of the radiator.
[0013] Furthermore, the first return water pipe is connected to the top of the radiator, and the first return water pipe is located on one side of the engine outlet water pipe.
[0014] Furthermore, a thermostat is provided between the engine and the radiator.
[0015] This utility model also provides an engineering machinery, including a main body of the engineering machinery and an engine degassing device as described in any of the above technical solutions, wherein the engine degassing device is disposed on the main body of the engineering machinery.
[0016] In summary, the technical solution of this utility model has the following beneficial effects: The structural design of this utility model is reasonable. It includes an engine equipped with an EGR (Exhaust Gas Regulator), an EGR port connected to one end of a degassing pipe, and the other end of the degassing pipe connected to the first port of a three-way valve. The second port of the three-way valve is connected to one end of a first return water pipe, and the other end of the first return water pipe is connected to the radiator. The engine also has an engine inlet water pipe, which is connected to the radiator. The third port of the three-way valve is connected to one end of a second return water pipe, and the other end of the second return water pipe is connected to the engine inlet water pipe. The engine coolant inlet pipe is connected; thus, at low temperatures, during the engine coolant circulation process, the coolant can sequentially pass through the EGR, bleed port, bleed pipe, and the first port of the three-way valve to reach the interior of the three-way valve. Then, under the diversion and control of the three-way valve, a portion of the coolant sequentially flows back to the engine through the second port of the three-way valve, the first return pipe, the radiator, and the engine coolant inlet pipe. During this process, the bleed pipe exhausts gas to the radiator, while the other portion of the coolant sequentially flows back to the engine through the third port of the three-way valve, the second return pipe, and the engine coolant inlet pipe. From the above analysis, it can be seen that this utility model adds a three-way valve. The three-way valve, through its diversion function and by changing the diameter of the second port or reducing the diameter of the first return pipe, reduces the amount of coolant flowing into the radiator, thus reducing temperature loss. Simultaneously with bleeding, it allows as much coolant as possible to flow directly back to the engine through the second return pipe, allowing the coolant to heat up quickly and meet the heating requirements of the air conditioning system. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the engine degassing device of this utility model;
[0018] Figure 2 This is a schematic diagram of the structure of an existing engine degassing device;
[0019] Explanation of reference numerals in the attached drawings: Engine (1), Degassing pipe (2), Three-way valve (3), First return water pipe (4), Radiator (5), Engine inlet water pipe (6), Second return water pipe (7), Water tank (8), Connecting pipe (9), Pressure cap (10), Engine outlet water pipe (11); Existing engine (12), Existing EGR degassing pipe (13), Existing radiator (14). Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.
[0021] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1When observing, the observer above is designated as "up" and the observer below as "down." It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below," etc., used in this document to indicate orientation or positional relationships are based on the accompanying drawings and are solely for the purpose of clearly describing this utility model. They do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.
[0022] See Figure 1 This embodiment provides an engine degassing device, including an engine 1, an EGR (Electronic Gas Regulator), a degassing port, one end of a degassing pipe 2, the other end of a three-way valve 3, a second port of a three-way valve 3, one end of a first return water pipe 4, the other end of a first return water pipe 4, a radiator 5, an engine inlet water pipe 6, a radiator 5, a third port of a three-way valve 3, one end of a second return water pipe 7, and the other end of a second return water pipe 7, which is connected to the engine inlet water pipe 6. Function: At low temperatures, during the engine coolant circulation process, the coolant flows from the engine through the EGR, bleed port, bleed pipe, and the first port of the three-way valve to the inside of the three-way valve. Then, under the diversion and control of the three-way valve, a portion of the coolant flows back to the engine through the second port of the three-way valve, the first return pipe, the radiator, and the engine inlet pipe. During this process, bleed gas is discharged through the radiator, while the remaining coolant flows back to the engine through the third port of the three-way valve, the second return pipe, and the engine inlet pipe. As can be seen from the above analysis, this invention adds a three-way valve. Through its diversion function and by changing the diameter of the second port or reducing the diameter of the first return pipe, the three-way valve reduces the amount of coolant flowing into the radiator, thus reducing temperature loss. Simultaneously with bleeding, it allows as much coolant as possible to flow directly back to the engine through the second return pipe, enabling the coolant to heat up quickly and meet the heating requirements of the air conditioning system.
[0023] Specifically, the degassing pipe 2, the first return water pipe 4, and the second return water pipe 7 are flexible hoses. Function: The flexible hose arrangement allows for flexible cooling. Coolant flows through the engine, EGR, degassing port, and degassing pipe, then is diverted by a three-way valve, flowing back to the radiator and engine inlet pipe via the first return water pipe 4 (the three-way valve controls the flow to the first return water pipe 4 to a smaller diameter) and the second return water pipe 7 (the three-way valve controls the flow to the second return water pipe 7 to a larger diameter).
[0024] Specifically, the radiator 5 and the reservoir 8 are connected via a connecting pipe 9, with the reservoir 8 open to the atmosphere. Function: When the coolant heats up, its volume and pressure increase, allowing it to flow into the reservoir through the connecting pipe 9. After shutdown, the coolant temperature drops, its volume decreases, and the coolant in the reservoir flows back to the radiator through the connecting pipe 9. Furthermore, since the reservoir 8 is open to the atmosphere, gases inside the radiator 5 can also be discharged into the reservoir 8 through the connecting pipe 9, thus venting the gases into the atmosphere. Preferably, the connecting pipe 9 is a flexible hose.
[0025] Specifically, the radiator 5 is equipped with a pressure cap 10, and one end of the connecting pipe 9 is connected to the pressure cap 10. Function: When the coolant heats up, its volume increases, and its pressure increases, allowing it to enter the reservoir through the pressure cap and connecting pipe. After the machine stops, the coolant temperature drops, its volume decreases, and the coolant in the reservoir flows back to the radiator through the connecting pipe and pressure cap.
[0026] Specifically, the pressure cap 10 is located on top of the radiator 5, and the coolant reservoir 8 is located on one side of the radiator 5. The horizontal centerline of the reservoir 8 is lower than the horizontal centerline of the pressure cap 10, and the other end of the connecting pipe 9 is connected to the bottom of the reservoir 8. Function: When the EGR gas passes through the radiator, it generates pressure within the radiator. This pressure causes the pressure cap to open, allowing the gas to flow through the connecting pipe 9 into the reservoir 8. When the engine coolant temperature rises and its volume increases, the pressure within the radiator increases. This pressure forces the pressure cap to open, allowing coolant to flow through the connecting pipe 9 into the reservoir 8. This allows coolant to flow from the radiator to the reservoir 8 for storage. When the engine stops, the coolant temperature cools and its volume decreases, reducing the pressure within the radiator. The coolant in the reservoir 8 can then flow back into the radiator through the connecting pipe 9 to replenish the engine coolant.
[0027] Specifically, engine 1 is equipped with an engine water outlet pipe 11, and radiator 5 is connected to the engine water outlet pipe 11. Function: When the coolant temperature rises, the coolant in the engine is cooled by the radiator through the engine water outlet pipe 11 and then flows back to the engine to achieve external circulation.
[0028] Specifically, the engine outlet pipe 11 is connected to the top of the radiator 5, and the engine inlet pipe 6 is connected to the bottom of the radiator 5. This connection arrangement facilitates the downward flow of coolant within the radiator 5.
[0029] Specifically, the first return water pipe 4 is connected to the top of the radiator 5, and the first return water pipe 4 is located on one side of the engine outlet water pipe 11. Function: The position of the first return water pipe 4 facilitates the connection between the coolant, gas, pressure cap 10, connecting pipe 9, and water tank 8.
[0030] Specifically, a thermostat is installed between engine 1 and radiator 5. Its function is to reduce temperature loss by decreasing the amount of coolant flowing back to the radiator before the thermostat (also called a thermostatic valve) opens. This allows as much coolant as possible to flow directly back to the engine, rapidly warming it up to meet the heating requirements of the air conditioning system. Once the coolant temperature rises, the thermostat opens, and the coolant in the engine is cooled by the radiator before flowing back to the engine, achieving external circulation.
[0031] This utility model also provides a type of construction machinery, including a main body of the construction machinery and an engine degassing device according to any of the above-mentioned technical solutions, wherein the engine degassing device is disposed on the main body of the construction machinery. Application: The engine degassing device of this utility model can be applied to a wide range of construction machinery such as excavators and loaders.
[0032] In summary, the technical solution of this utility model adds a three-way valve. This three-way valve, through its flow-diverting function and by changing the diameter of the second port or reducing the diameter of the first return water pipe, reduces the amount of coolant flowing into the radiator. Simultaneously, it degassing the system while allowing as much coolant as possible to flow directly back to the engine through the return water pipe.
[0033] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. An engine degassing device, comprising an engine (1), characterized in that: The engine (1) is equipped with an EGR, the EGR is equipped with a degassing port, the degassing port is connected to one end of a degassing pipe (2), the other end of the degassing pipe (2) is connected to the first port of a three-way valve (3), the second port of the three-way valve (3) is connected to one end of a first return water pipe (4), the other end of the first return water pipe (4) is connected to a radiator (5), the engine (1) is equipped with an engine water inlet pipe (6), the radiator (5) is connected to the engine water inlet pipe (6), the third port of the three-way valve (3) is connected to one end of a second return water pipe (7), and the other end of the second return water pipe (7) is connected to the engine water inlet pipe (6).
2. The engine degassing device according to claim 1, characterized in that: The degassing pipe (2), the first return water pipe (4), and the second return water pipe (7) are all flexible hoses.
3. The engine degassing device according to claim 1, characterized in that: The radiator (5) and the kettle (8) are connected by a connecting pipe (9), and the kettle (8) is in communication with the atmosphere.
4. The engine degassing device according to claim 3, characterized in that: The radiator (5) is provided with a pressure cover (10), and one end of the connecting pipe (9) is connected to the pressure cover (10).
5. The engine degassing device according to claim 4, characterized in that: The pressure cap (10) is located on the top of the radiator (5), the kettle (8) is located on one side of the radiator (5), the horizontal center line of the kettle (8) is lower than the horizontal center line of the pressure cap (10), and the other end of the connecting pipe (9) is connected to the bottom of the kettle (8).
6. The engine degassing device according to claim 1, characterized in that: The engine (1) is provided with an engine water outlet pipe (11), and the radiator (5) is connected to the engine water outlet pipe (11).
7. The engine degassing device according to claim 6, characterized in that: The engine water outlet pipe (11) is connected to the top of the radiator (5), and the engine water inlet pipe (6) is connected to the bottom of the radiator (5).
8. The engine degassing device according to claim 7, characterized in that: The first return water pipe (4) is connected to the top of the radiator (5), and the first return water pipe (4) is located on one side of the engine outlet water pipe (11).
9. An engine degassing device according to any one of claims 1 to 8, characterized in that: A thermostat is provided between the engine (1) and the radiator (5).
10. An engineering machinery, comprising an engineering machinery body, characterized in that, It also includes the engine degassing device according to any one of claims 1 to 9, wherein the engine degassing device is disposed on the main body of the engineering machinery.