Thermostat with built-in small circulation structure

Abstract

The utility model discloses a thermostat with a built-in small circulation structure, which comprises a shell connected with an engine cylinder body, a liquid inlet hole communicated with the cylinder body is formed at the bottom of the shell, a temperature adjusting element is arranged in the shell, and the temperature adjusting element is provided with a first control valve plate and a second control valve plate. A first liquid outlet pipe opening and a second liquid outlet pipe opening are formed in the shell; the temperature adjusting element has a first circulation state and a second circulation state, when the temperature adjusting element is in the first circulation state, the first liquid outlet pipe opening and the liquid inlet hole are separated by the first control valve plate, the liquid inlet hole is communicated with the second liquid outlet pipe opening, and a first circulation path is formed, and when the temperature adjusting element is in the second circulation state, the first circulation path is communicated with the second circulation path. The second liquid outlet pipe orifice and the liquid inlet hole are separated by the second control valve plate, and the liquid inlet hole is communicated with the first liquid outlet pipe orifice to form a second circulation path.

Description

Technical Field

[0001] This utility model relates to the field of thermostat technology, specifically to a thermostat with a built-in small circulation structure. Background Technology

[0002] The thermostat is an important automotive component. Its main function is to regulate the flow path of engine coolant. By controlling the flow path of coolant, the thermostat divides the coolant into a small circulation loop and a large circulation loop to ensure that the engine operates at the optimal temperature.

[0003] When the engine is cold-started or at a low temperature, the thermostat performs a small cycle to help the engine warm up quickly to the operating temperature. When the engine temperature reaches the set value, the thermostat performs a large cycle to prevent the engine from overheating and to maintain a stable temperature.

[0004] However, existing thermostat designs have some limitations. These thermostats usually require a portion of the small circulation structure to be placed on the engine block, which means that some cylinder blocks without a small circulation structure cannot cooperate with the thermostat and thus cannot achieve the small circulation function. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a thermostat with a built-in small circulation structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A thermostat with a built-in small circulation structure includes a housing connected to an engine cylinder block, the bottom of the housing forming a liquid inlet communicating with the cylinder block, a temperature regulating element disposed inside the housing, the temperature regulating element having a first control valve plate and a second control valve plate, and a first liquid outlet and a second liquid outlet formed on the housing.

[0008] The temperature regulating element has a first cycle state and a second cycle state. When the temperature regulating element is in the first cycle state, the first control valve plate isolates the first liquid outlet and the liquid inlet, and the liquid inlet is connected to the second liquid outlet, forming a first cycle path. When the temperature regulating element is in the second cycle state, the second control valve plate isolates the second liquid outlet and the liquid inlet, and the liquid inlet is connected to the first liquid outlet, forming a second cycle path.

[0009] Preferably, a circulation bracket is inserted inside the outer casing, and a connecting groove is formed on the circulation bracket to connect to the first liquid outlet. The first control valve plate abuts against the connecting groove to isolate the liquid inlet and the first liquid outlet. With the above improvement, when the thermostat needs to perform a small circulation, the second control valve plate isolates the second liquid outlet and the liquid inlet. The coolant enters the outer casing through the liquid inlet at the bottom of the outer casing and is discharged from the first liquid outlet through the connecting groove, thereby achieving rapid heating and reducing cold start wear.

[0010] Preferably, the circulation bracket includes a water inlet body and connecting protrusions connecting both sides of the water inlet body. The connecting groove includes a first water inlet groove and a second water inlet groove. The first water inlet groove is opened on the top of the water inlet body and is connected to the liquid inlet hole. The second water inlet groove is set in the connecting protrusion on one side and is connected to the first liquid outlet to form a circulation channel. With the above improvements, in the small circulation process, the coolant first enters the interior of the outer shell through the liquid inlet hole at the bottom of the outer shell, and then enters the water inlet body through the first water inlet groove. Then, it is discharged towards the first liquid outlet through the second water inlet groove to realize the small circulation.

[0011] Preferably, the circulation distance of the first circulation path is greater than the circulation distance of the second circulation path. Through the above improvements, the first circulation path constitutes a large circulation and the second circulation path constitutes a small circulation, enabling the engine block to perform both small and large circulations.

[0012] Preferably, the outer casing forms a liquid inlet chamber, and the second control valve plate divides the liquid inlet chamber into an upper guide chamber and a lower guide chamber. The circulation bracket is placed in the lower guide chamber. Through the above improvement, the second control valve plate divides the entire liquid inlet chamber inside the outer casing into an upper guide chamber and a lower guide chamber. When a large circulation is performed, the first control valve plate abuts against the connecting groove on the circulation bracket, and the second control valve plate moves away from the upper guide chamber. Coolant enters the outer casing through the liquid inlet hole, and then enters the upper guide chamber from the lower guide chamber. Finally, it is discharged through the second liquid outlet port connected to the upper guide chamber. When a small circulation is performed, the second control valve plate isolates the upper guide chamber, and the first control valve plate moves away from the circulation bracket. Coolant enters the outer casing through the liquid inlet hole, and then enters the first liquid outlet port through the circulation bracket and is discharged, thus realizing the temperature regulation function.

[0013] Preferably, the circulation support slides downward along the outer shell, so that the second water inlet tank and the first liquid outlet are staggered, and the output diameter of the second water inlet tank is reduced. Through the above improvement, the position of the circulation support can be adjusted so that the second water inlet tank and the first liquid outlet are staggered, thereby reducing the output diameter of the second water inlet tank, thereby further increasing the flow rate and improving the circulation efficiency.

[0014] Preferably, the periphery of the first water inlet tank is provided with an upwardly extending guide protrusion, and the first control valve plate slides up and down along the guide protrusion. Through the above improvements, the guide protrusion can guide the first control valve plate, further improving the stability of the first control valve plate during the up and down sliding process, and at the same time ensuring the sealing performance of the first control valve plate to the first water inlet tank.

[0015] Preferably, the temperature regulating element further includes an expansion member passing through the second control valve plate and a push rod connected to the expansion member. The lower part of the expansion member is provided with a baffle, and an elastic member is provided between the baffle and the second control valve plate. A positioning protrusion is formed inside the housing, and the baffle is engaged with the positioning protrusion. Through the above improvements, the push rod is fixed on the housing, and the expansion member drives the first and second control valve plates to move according to the temperature change, and is reset by the elastic member, thereby realizing the regulation of temperature.

[0016] Preferably, the housing is provided with a positioning protrusion for installing a temperature regulating element, the bottom of the positioning protrusion is formed with a snap-fit ​​protrusion, and the circulation bracket is formed with a snap-fit ​​groove for inserting the snap-fit ​​protrusion. Through the above improvements, the cooperation between the snap-fit ​​protrusion and the snap-fit ​​groove ensures the accuracy and stability of the circulation bracket installation.

[0017] Preferably, a sealing groove is formed on the outer periphery of the liquid inlet hole, and a sealing ring is provided in the sealing groove. Through the above improvements, the sealing performance of the connection between the thermostat and the cylinder is greatly improved.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] By attaching the outer casing to a cylinder block without a small circulation structure, coolant in the cylinder block can enter the casing through the inlet port at the bottom of the casing. The temperature regulating element has a first circulation state and a second circulation state. When the temperature regulating element is in the first circulation state, the first control valve isolates the first outlet port and the inlet port, and the inlet port is connected to the second outlet port, forming the first circulation path. At this time, the temperature regulating element performs a large circulation for heat dissipation. When the temperature regulating element is in the second circulation state, the second control valve isolates the second outlet port and the inlet port, and the inlet port is connected to the first outlet port, forming the second circulation path. At this time, the temperature regulating element performs a small circulation for rapid heating. All small and large circulation structures are inherited from the thermostat, so that the cylinder block without a small circulation structure can cooperate with the thermostat to perform both small and large circulations, thereby better regulating the temperature. This solves the problem that existing thermostats need to set a small circulation structure on the cylinder block, and improves versatility and applicability. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the outer shell and the temperature regulating element of this utility model.

[0022] Figure 3 This is an exploded view of the overall structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0024] Figure 5 This is a schematic diagram of the temperature regulating element of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the circulation support of this utility model;

[0026] Figure 7 This is a schematic diagram of the temperature regulating element of this utility model in the second cycle state;

[0027] Figure 8 This is a schematic diagram of the temperature regulating element of this utility model in the first cycle state;

[0028] Figure 9 This is a schematic diagram of the structure of the circulating support of this utility model that slides downward and cooperates with the outer shell;

[0029] In the diagram: 1. Outer shell; 2. Liquid inlet; 3. Temperature control element; 4. First control valve plate; 5. Second control valve plate; 6. First liquid outlet; 7. Second liquid outlet; 8. First circulation path; 9. Second circulation path; 1.1 Circulation support; 1.2 Connecting groove; 1.3 First water inlet groove; 1.4 Second water inlet groove; 1.5 Abutting protrusion; 2.1 Liquid inlet chamber; 2.2 Upper guide chamber; 2.3 Lower guide chamber; 2.4 Guide protrusion; 3.1 Expansion member; 3.2 Push rod; 3.3 Baffle; 3.4 Elastic member; 3.5 Positioning protrusion; 3.6 Snap-fit ​​protrusion; 3.7 Snap-fit ​​groove; 4.1 Sealing groove; 4.2 Sealing ring; 5.1 Water inlet body; 5.2 Connecting protrusion; 5.3 Circulation channel; Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0032] like Figure 1-9 As shown, a thermostat with a built-in small circulation structure includes a housing 1 connected to the engine cylinder block, a liquid inlet 2 communicating with the cylinder block at the bottom of the housing 1, a temperature regulating element 3 provided inside the housing 1, and the temperature regulating element 3 having a first control valve plate 4 and a second control valve plate 5, and a first liquid outlet 6 and a second liquid outlet 7 formed on the housing 1.

[0033] Specifically, the temperature regulating element 3 has a first cycle state and a second cycle state. When the temperature regulating element 3 is in the first cycle state, the first control valve plate 4 isolates the first liquid outlet 6 and the liquid inlet 2, and the liquid inlet 2 is connected to the second liquid outlet 7, forming the first cycle path 8. When the temperature regulating element 3 is in the second cycle state, the second control valve plate 5 isolates the second liquid outlet 7 and the liquid inlet 2, and the liquid inlet 2 is connected to the first liquid outlet 6, forming the second cycle path 9.

[0034] Among them, the loop distance of the first loop path 8 is greater than the loop distance of the second loop path 9. The first loop path 8 is the loop path of the large loop, and the second loop path 9 is the loop path of the small loop.

[0035] By attaching the outer casing 1 to a cylinder block without a small circulation structure, when rapid heating is required, the temperature regulating element 3 is in the second circulation state. The second control valve plate 5 isolates the second liquid outlet 7 and the liquid inlet 2, and the liquid inlet 2 is connected to the first liquid outlet 6, forming the second circulation path 9. At this time, the thermostat performs a small circulation for rapid heating. When heat dissipation is required, the temperature regulating element 3 is in the first circulation state. The first control valve plate 4 isolates the first liquid outlet 6 and the liquid inlet 2, and the liquid inlet 2 is connected to the second liquid outlet 7, forming the first circulation path 8. At this time, the thermostat performs a large circulation for heat dissipation. This allows the engine cylinder block without a small circulation structure to cooperate with the thermostat in both small and large circulation, thereby better regulating the temperature. This solves the problem that existing thermostats cannot cooperate with cylinder blocks without a small circulation structure for small circulation, and improves the applicability and versatility of the thermostat.

[0036] like Figures 6 to 9 As shown, in a further explanation of the embodiment of the circulation bracket 1.1, the circulation bracket 1.1 is inserted into the outer shell 1. The circulation bracket 1.1 has a connecting groove 1.2 that connects to the first liquid outlet 6. The first control valve plate 4 abuts against the connecting groove 1.2 to isolate the liquid inlet 2 and the first liquid outlet 6.

[0037] When the temperature regulating element 3 is in the second cycle state, the second control valve plate 5 isolates the second liquid outlet 7 and the liquid inlet 2, and the liquid inlet 2 is connected to the first liquid outlet 6. The coolant enters the circulation bracket 1.1 through the liquid inlet 2, and enters the first liquid outlet 6 through the connecting groove 1.2 on the circulation bracket 1.1, forming the second circulation path 9. At this time, when the thermostat needs to perform a small cycle, it can achieve rapid heating to reduce cold start wear.

[0038] Furthermore, the circulation support 1.1 includes a water inlet body 5.1 and connecting protrusions 5.2 connecting both sides of the water inlet body 5.1. The connecting groove 1.2 includes a first water inlet groove 1.3 and a second water inlet groove 1.4. The first water inlet groove 1.3 is opened on the top of the water inlet body 5.1 and is connected to the liquid inlet hole 2.

[0039] The second water inlet 1.4 is located in the connecting protrusion 5.2 on one side and is connected to the first liquid outlet 6 to form a circulation channel 5.3. In the small circulation process, the coolant first enters the interior of the outer shell 1 through the liquid inlet hole 2 at the bottom of the outer shell 1, and then enters the water inlet body 5.1 through the first water inlet 1.3. Then, it is discharged towards the first liquid outlet 6 through the second water inlet 1.4 to realize the small circulation.

[0040] like Figure 6 As shown, preferably, the end of the connecting protrusion 5.2 is formed with an abutting protrusion 1.5, which abuts against the inner wall of the outer shell 1. The circulation bracket 1.1 is interference-fitted with the inner wall of the outer shell 1, which greatly improves the sealing between the circulation bracket 1.1 and the outer shell 1 and prevents coolant from flowing out through the gap between the connecting protrusion and the outer shell 1.

[0041] Furthermore, the housing 1 is provided with a positioning protrusion 3.5 for installing the temperature regulating element 3. The bottom of the positioning protrusion 3.5 forms a snap-fit ​​protrusion 3.6. The circulation bracket 1.1 is formed with a snap-fit ​​groove 3.7 for the snap-fit ​​protrusion 3.6 to be inserted. The cooperation between the snap-fit ​​protrusion 3.6 and the snap-fit ​​groove 3.7 ensures the accuracy and stability of the installation of the circulation bracket 1.1.

[0042] Preferably, the engine cylinder block is provided with a corresponding support part at the attachment position of the outer shell 1, and the engine cylinder block will support the bottom of the circulation bracket to ensure the reliability of its installation.

[0043] like Figure 2 As shown, preferably, the bottom of the circulation bracket 1.1 is formed with an indicator arrow, which realizes the foolproof function of installing the circulation bracket 1.1.

[0044] like Figure 7 , Figure 8As shown, preferably, the first water inlet tank 1.3 has an upwardly extending guide protrusion 2.4 on its periphery. The first control valve plate 4 slides up and down along the guide protrusion 2.4. The guide protrusion 2.4 can guide the first control valve plate 4, further improving the stability of the first control valve plate 4 during the up and down sliding process, and at the same time ensuring the sealing of the first control valve plate 4 to the first water inlet tank 1.3.

[0045] like Figure 9 As shown, in some other embodiments, the circulation support 1.1 can be slid downward along the outer shell 1, so that the second water inlet 1.4 and the first liquid outlet 6 are staggered, and the output diameter of the second water inlet 1.4 is forced to decrease, thereby reducing the output diameter of the second water inlet 1.4, thereby further increasing the flow rate and improving the circulation efficiency.

[0046] Meanwhile, as the circulation support 1.1 slides downward, the circulation path of the entire second circulation path 9 is further shortened to improve circulation efficiency and achieve rapid heating.

[0047] As a further explanation of the internal space of the outer casing 1, the outer casing 1 forms an inlet chamber 2.1. The inlet chamber 2.1 is divided into an upper guide chamber 2.2 and a lower guide chamber 2.3 by the second control valve plate 5. The circulation bracket 1.1 is placed in the lower guide chamber 2.3, and the second outlet pipe 7 is connected to the upper guide chamber 2.2.

[0048] The second control valve 5 divides the entire liquid inlet chamber 2.1 inside the outer casing 1 into an upper guide chamber 2.2 and a lower guide chamber 2.3. During large circulation, the first control valve 4 abuts against the connecting groove 1.2 on the circulation bracket 1.1, and the second control valve 5 moves away from the upper guide chamber 2.2. Coolant enters the outer casing 1 through the liquid inlet 2 and enters the upper guide chamber 2.2 from the lower guide chamber 2.3, and finally exits through the second outlet 7 connected to the upper guide chamber 2.2. During small circulation, the second control valve 5 isolates the upper guide chamber 2.2, and the first control valve 4 moves away from the circulation bracket 1.1. Coolant enters the outer casing 1 through the liquid inlet 2 and enters the first outlet 6 through the circulation bracket 1.1 and is then discharged, thus achieving the temperature regulation function.

[0049] like Figure 2 , Figure 4 As shown, preferably, a sealing groove 4.1 is formed on the outer periphery of the liquid inlet hole 2, and a sealing ring 4.2 is provided in the sealing groove 4.1, which greatly improves the sealing performance of the connection between the thermostat and the engine block.

[0050] like Figure 3 , Figure 5 , Figure 7 , Figure 8As shown, further explanation of the structure of the temperature regulating element 3: the temperature regulating element 3 also includes an expansion member 3.1 passing through the second control valve plate, and a top rod 3.2 connected to the expansion member 3.1. The top rod 3.2 is fixed on the outer shell 1, and a baffle 3.3 is provided at the lower part of the expansion member 3.1. An elastic member 3.4 is provided between the baffle 3.3 and the second control valve plate, and a positioning protrusion 3.5 is formed inside the outer shell 1. The baffle 3.3 is engaged with the positioning protrusion 3.5. The expansion member 3.1 drives the first control valve plate 4 and the second control valve plate 5 to move according to the temperature change, and is reset by the elastic member 3.4, thereby realizing the regulation of temperature.

[0051] Preferably, the temperature regulating element 3 in this application is a mechanical thermostat.

[0052] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A thermostat with a built-in small circulation structure, characterized in that, The device includes a housing (1) connected to the engine cylinder block, the bottom of the housing (1) forming a liquid inlet (2) communicating with the cylinder block, an adjusting element (3) is provided inside the housing (1), and the adjusting element (3) has a first control valve plate (4) and a second control valve plate (5), and a first liquid outlet (6) and a second liquid outlet (7) are formed on the housing (1). The regulating element (3) has a first cycle state and a second cycle state. When the regulating element (3) is in the first cycle state, the first control valve plate (4) isolates the first liquid outlet (6) and the liquid inlet (2), and the liquid inlet (2) is connected to the second liquid outlet (7) and forms a first cycle path (8). When the regulating element (3) is in the second cycle state, the second control valve plate (5) isolates the second liquid outlet (7) and the liquid inlet (2), and the liquid inlet (2) is connected to the first liquid outlet (6) and forms a second cycle path (9).

2. The thermostat with a built-in small circulation structure according to claim 1, characterized in that, A circulation bracket (1.1) is inserted inside the outer casing (1). A connecting groove (1.2) is formed on the circulation bracket (1.1) to connect to the first liquid outlet (6). The first control valve plate (4) abuts against the connecting groove (1.2) to isolate the liquid inlet (2) and the first liquid outlet (6).

3. A thermostat with a built-in small circulation structure according to claim 2, characterized in that, The circulation support (1.1) includes a water inlet body (5.1) and a connecting protrusion (5.2) connecting both sides of the water inlet body (5.1). The connecting groove (1.2) includes a first water inlet groove (1.3) and a second water inlet groove (1.4). The first water inlet groove (1.3) is opened on the top of the water inlet body (5.1) and is connected to the liquid inlet hole (2). The second water inlet groove (1.4) is set in the connecting protrusion (5.2) on one side and is connected to the first liquid outlet (6) to form a circulation channel (5.3).

4. A thermostat with a built-in small circulation structure according to claim 1, characterized in that, The loop distance of the first loop path (8) is greater than the loop distance of the second loop path (9).

5. A thermostat with a built-in small circulation structure according to claim 2, characterized in that, The outer shell (1) forms an inlet chamber (2.1), and the second control valve plate (5) divides the inlet chamber (2.1) into an upper guide chamber (2.2) and a lower guide chamber (2.3). The circulation bracket (1.1) is placed in the lower guide chamber (2.3).

6. A thermostat with a built-in small circulation structure according to claim 4, characterized in that, The circulation bracket (1.1) slides downward along the outer shell (1), causing the second water inlet tank (1.4) and the first liquid outlet (6) to be staggered, and forcing the output diameter of the second water inlet tank (1.4) to decrease.

7. A thermostat with a built-in small circulation structure according to claim 4, characterized in that, The first water inlet tank (1.3) has an upwardly extending guide protrusion (2.4) on its periphery, and the first control valve plate (4) slides up and down along the guide protrusion (2.4).

8. A thermostat with a built-in small circulation structure according to claim 1, characterized in that, The adjusting element (3) further includes an expansion member (3.1) passing through the second control valve plate (5) and a top rod (3.2) connected to the expansion member (3.1). The lower part of the expansion member (3.1) is provided with a baffle (3.3). An elastic member (3.4) is provided between the baffle (3.3) and the second control valve plate (5). A positioning protrusion (3.5) is formed inside the outer shell (1), and the baffle (3.3) is engaged with the positioning protrusion (3.5).

9. A thermostat with a built-in small circulation structure according to claim 1, characterized in that, The housing (1) is provided with a positioning protrusion (3.5) for installing the adjustment element (3), and the bottom of the positioning protrusion (3.5) is formed with a snap-fit ​​protrusion (3.6). The circulation bracket (1.1) is formed with a snap-fit ​​groove (3.7) for inserting the snap-fit ​​protrusion (3.6).

10. A thermostat with a built-in small circulation structure according to claim 1, characterized in that, A sealing groove (4.1) is formed on the outer periphery of the liquid inlet (2), and a sealing ring (4.2) is provided in the sealing groove (4.1).

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