Thermostat with built-in small circulation structure

Abstract

The thermostat with the built-in small circulation structure comprises a shell connected with an engine cylinder body, a liquid inlet hole communicated with the cylinder body is formed in 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] The invention relates to the technical field of thermostats, and in particular to a thermostat with a built-in small circulation structure. Background Art

[0002] The car thermostat is an important car component. The main function of the car thermostat is to adjust the flow path of the engine coolant. The car thermostat controls the flow path of the coolant, which is divided into a small cycle and a large cycle to ensure that the engine runs at the optimal temperature.

[0003] When the engine is cold started or the temperature is low, the thermostat performs a small cycle to help the engine quickly heat up 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 maintain a stable temperature.

[0004] However, existing thermostat designs have some limitations. These thermostats usually require part of the small circulation structure to be set on the engine cylinder block, which results in some cylinder blocks without small circulation structures being unable to cooperate with the thermostat, thereby failing to realize the small circulation function. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a thermostat with a built-in small circulation structure.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] A thermostat with a built-in small circulation structure, comprising a shell connected to an engine cylinder body, the bottom of the shell forming a liquid inlet hole connected to the cylinder body, a thermostat element arranged in the shell, and the thermostat element having a first control valve plate and a second control valve plate, and a first liquid outlet pipe opening and a second liquid outlet pipe opening formed on the shell;

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

[0009] Preferably, a circulation bracket is inserted into the outer shell, and a connecting groove connected to the first liquid outlet is formed on the circulation bracket. The first control valve plate abuts the connecting groove to separate the liquid inlet hole and the first liquid outlet. Through the above improvement, when the thermostat needs to perform a small circulation, the second control valve plate separates the second liquid outlet and the liquid inlet hole, and the coolant enters the guide shell through the liquid inlet hole at the bottom of the outer shell, and is discharged from the first liquid outlet through the connecting groove, thereby achieving rapid heating to reduce cold start wear.

[0010] Preferably, the circulation bracket includes a water inlet body and a connecting protrusion connecting both sides of the water inlet body, the connecting groove includes a connected first water inlet groove and a second water inlet groove, the first water inlet groove is opened at the top of the water inlet body and connected to the liquid inlet hole, the second water inlet groove is arranged in the connecting protrusion on one side, and connected to the first liquid outlet pipe to form a circulation channel. Through the above improvements, in the small circulation process, the coolant first enters the interior of the shell through the liquid inlet hole at the bottom of the shell, and enters the water inlet body through the first water inlet groove, and then is discharged toward the first liquid outlet pipe 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, so that the engine cylinder can perform small circulation and large circulation.

[0012] Preferably, a liquid inlet chamber is formed in the shell, and the second control valve plate divides the liquid inlet chamber into an upper guide chamber and a lower guide chamber at the upper and lower boundaries, and the circulation bracket is placed in the lower guide chamber. Through the above improvements, the second control valve plate is used to divide the entire liquid inlet chamber inside the shell into an upper guide chamber and a lower guide chamber. When a large circulation is performed, the first control valve plate abuts the connecting groove on the circulation bracket, and the second control valve plate is away from the upper guide chamber. The coolant enters the guide shell through the liquid inlet hole, enters the upper guide chamber from the lower guide chamber, and is finally discharged through the second liquid outlet pipe 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 is away from the circulation bracket. The coolant enters the guide shell through the liquid inlet hole, and enters the first liquid outlet pipe through the circulation bracket and is discharged, thereby realizing the temperature control function.

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

[0014] Preferably, the first water inlet groove has a peripheral side formed with a guide protrusion extending upward, and the first control valve plate slides up and down along the guide protrusion. Through the above improvement, the guide protrusion can guide the first control valve plate, further improving the stability of the first control valve plate in the process of sliding up and down, and at the same time ensuring the sealing performance of the first control valve plate to the first water inlet groove.

[0015] Preferably, the temperature regulating element also includes an expansion member inserted through the second control valve plate, and a push rod connected to the expansion member, and a baffle is provided at the lower portion of the expansion member, an elastic member is provided between the baffle and the second control valve plate, and a positioning protrusion is formed in the outer shell, and the baffle is clamped on the positioning protrusion. Through the above improvements, the push rod is fixed to the outer shell, and the expansion member is used to drive the first control valve plate and the second control valve plate to move according to temperature changes, and is reset by the elastic member, thereby realizing temperature regulation.

[0016] Preferably, a positioning protrusion for installing the temperature regulating element is provided in the shell, a snap-on protrusion is formed at the bottom of the positioning protrusion, and a snap-on groove for inserting the snap-on protrusion is formed on the circulation bracket. Through the above improvements, the cooperation between the snap-on protrusion and the snap-on groove is utilized to ensure the accuracy of the installation of the circulation bracket and the stability of the installation.

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

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

[0019] By attaching the outer shell to a cylinder body without a small circulation structure, the coolant in the cylinder body can enter the interior of the outer shell through the liquid inlet hole at the bottom of the outer shell, and 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 plate separates the first liquid outlet pipe and the liquid inlet hole, and the liquid inlet hole is connected to the second liquid outlet pipe, and a first circulation path is formed. At this time, the temperature regulating element performs a large circulation to dissipate heat, and when the temperature regulating element is in the second circulation state, the second control valve plate separates the second liquid outlet pipe and the liquid inlet hole, and the liquid inlet hole is connected to the first liquid outlet pipe, and a second circulation path is formed. At this time, the temperature regulating element performs a small circulation to quickly heat up, and all the small circulation structures and large circulation structures are inherited on the thermostat, so that the cylinder body without a small circulation structure cooperates with the thermostat to perform small circulation and large circulation, thereby better adjusting the temperature, thereby solving the problem that the existing thermostat needs to set a small circulation structure on the cylinder body, and improving the versatility and scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the housing and the temperature regulating element of the present invention;

[0022] Figure 3 An exploded view of the overall structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure inside the housing of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the temperature regulating element of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the circulation stent of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the temperature regulating element of the present invention in the second circulation state;

[0027] Figure 8 It is a structural schematic diagram of the temperature regulating element of the present invention in the first circulation state;

[0028] Fig. 9 It is a structural schematic diagram of the circulation support of the present invention sliding downward to cooperate with the housing;

[0029] In the figure: 1, housing; 2, liquid inlet hole; 3, temperature regulating element; 4, first control valve plate; 5, second control valve plate; 6, first liquid outlet pipe port; 7, second liquid outlet pipe port; 8, first circulation path; 9, second circulation path; 1.1, circulation bracket; 1.2, connecting groove; 1.3, first water inlet groove; 1.4, second water inlet groove; 1.5, abutting convex part; 2.1, liquid inlet cavity; 2.2, upper guide chamber; 2.3, lower guide chamber; 2.4, guiding convex part; 3.1, expansion member; 3.2, ejector rod; 3.3, baffle plate; 3.4, elastic member; 3.5, positioning convex part; 3.6, clamping convex part; 3.7, clamping groove; 4.1, sealing groove; 4.2, sealing ring; 5.1, water inlet body; 5.2, connecting convex part; 5.3, circulation channel; DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0032] like Figure 1-9 As shown, a thermostat with a built-in small circulation structure includes a shell 1 connected to the engine cylinder body, the bottom of the shell 1 forms a liquid inlet hole 2 connected to the cylinder body, a thermostat element 3 is arranged in the shell 1, and the thermostat element 3 has a first control valve plate 4 and a second control valve plate 5, and a first liquid outlet pipe port 6 and a second liquid outlet pipe port 7 are formed on the shell 1.

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

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

[0035] By attaching the shell 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 separates the second liquid outlet pipe 7 and the liquid inlet hole 2, and the liquid inlet hole 2 is connected to the first liquid outlet pipe 6, and a second circulation path 9 is formed. 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 separates the first liquid outlet pipe 6 and the liquid inlet hole 2, and the liquid inlet hole 2 is connected to the second liquid outlet pipe 7, and a first circulation path 8 is formed. At this time, the thermostat performs a large circulation for heat dissipation, so that the engine cylinder block without a small circulation structure cooperates with the thermostat to perform small circulation and large circulation, thereby better adjusting the temperature, solving the problem that the existing thermostat cannot cooperate with the cylinder block without a small circulation structure to perform small circulation, and improving the applicability and versatility of the thermostat.

[0036] like Figures 6 to 9 As shown, a further explanation of the implementation method of the circulation bracket 1.1 is provided, the circulation bracket 1.1 is inserted into the outer shell 1, and a connecting groove 1.2 connected to the first liquid outlet pipe 6 is formed on the circulation bracket 1.1, and the first control valve plate 4 abuts against the connecting groove 1.2 to separate the liquid inlet hole 2 and the first liquid outlet pipe 6.

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

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

[0039] Among them, the second water inlet groove 1.4 is arranged in the connecting protrusion 5.2 on one side, and is connected to the first liquid outlet pipe port 6 to form a circulation channel 5.3. In the small circulation process, the coolant first enters the inside of the shell 1 through the liquid inlet hole 2 at the bottom of the shell 1, and enters the water inlet body 5.1 through the first water inlet groove 1.3, and then is discharged toward the first liquid outlet pipe port 6 through the second water inlet groove 1.4 to realize a small circulation.

[0040] like Figure 6 As shown, preferably, an abutting protrusion 1.5 is formed at the end of the connecting protrusion 5.2, and the abutting protrusion 1.5 abuts against the inner wall of the outer shell 1, and the circulation bracket 1.1 is interference fit 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 the coolant from flowing out through the gap between the connecting protrusion and the outer shell 1.

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

[0042] Preferably, a corresponding supporting portion is provided on the engine cylinder body at the attachment position corresponding to the outer shell 1, and the engine cylinder body supports the bottom of the circulation bracket to ensure the reliability of its installation.

[0043] like Figure 2 As shown, as a preference, an indicating arrow is formed at the bottom of the circulation bracket 1.1, so as to realize a fool-proof function in the installation of the circulation bracket 1.1.

[0044] like Figure 7 , Figure 8As shown, preferably, the first water inlet groove 1.3 has an upwardly extending guide protrusion 2.4 formed on the peripheral side, and 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 in the process of sliding up and down, and at the same time ensuring the sealing performance of the first control valve plate 4 to the first water inlet groove 1.3.

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

[0046] At the same time, as the circulation bracket 1.1 slides downward, the circulation path of the entire second circulation path 9 is further shortened to improve the circulation efficiency and achieve rapid temperature rise.

[0047] As a further explanation of the internal space of the shell 1, a liquid inlet chamber 2.1 is formed in the shell 1. The second control valve plate 5 divides the liquid 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, and the second liquid outlet pipe 7 is connected to the upper guide chamber 2.2.

[0048] The entire liquid inlet cavity 2.1 inside the shell 1 is divided into an upper guide chamber 2.2 and a lower guide chamber 2.3 by the second control valve plate 5. When a large circulation is performed, the first control valve plate 4 abuts against the connecting groove 1.2 on the circulation bracket 1.1, and the second control valve plate 5 is away from the upper guide chamber 2.2. The coolant enters the guide shell 1 through the liquid inlet hole 2, and enters the upper guide chamber 2.2 from the lower guide chamber 2.3, and is finally discharged through the second liquid outlet pipe 7 connected to the upper guide chamber 2.2. When a small circulation is performed, the second control valve plate 5 blocks the upper guide chamber 2.2, and the first control valve plate 4 is away from the circulation bracket 1.1. The coolant enters the guide shell 1 through the liquid inlet hole 2, and enters the first liquid outlet pipe 6 through the circulation bracket 1.1 and is discharged, thereby realizing the temperature control function.

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

[0050] like Figure 3 , Figure 5 , Figure 7 , Figure 8As shown, further explanation of the structure of the temperature regulating element 3 is provided. The temperature regulating element 3 also includes an expansion member 3.1 inserted into the second control valve plate, and a push rod 3.2 connected to the expansion member 3.1, the push rod 3.2 is fixed to the housing 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 in the housing 1, and the baffle 3.3 is clamped on the positioning protrusion 3.5, the expansion member 3.1 is used to drive the first control valve plate 4 and the second control valve plate 5 to move according to the temperature change, and the elastic member 3.4 is used to reset them, thereby realizing the temperature regulation.

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

[0052] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A thermostat with a built-in small circulation structure, characterized in that: The invention comprises a housing (1) connected to an engine cylinder body, the bottom of the housing (1) forming a liquid inlet hole (2) connected to the cylinder body, an adjusting element (3) being arranged inside the housing (1), and the adjusting element (3) having a first control valve plate (4) and a second control valve plate (5), and a first liquid outlet pipe opening (6) and a second liquid outlet pipe opening (7) being formed on the housing (1); The regulating element (3) has a first circulation state and a second circulation state. When the regulating element (3) is in the first circulation state, the first control valve plate (4) separates the first liquid outlet pipe opening (6) and the liquid inlet hole (2), and the liquid inlet hole (2) is connected to the second liquid outlet pipe opening (7), thereby forming a first circulation path (8). When the regulating element (3) is in the second circulation state, the second control valve plate (5) separates the second liquid outlet pipe opening (7) and the liquid inlet hole (2), and the liquid inlet hole (2) is connected to the first liquid outlet pipe opening (6), thereby forming a second circulation 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 into the housing (1), a communication groove (1.2) connected to the first liquid outlet pipe (6) is formed on the circulation bracket (1.1), and the first control valve plate (4) abuts against the communication groove (1.2) to separate the liquid inlet hole (2) and the first liquid outlet pipe (6).

3. The thermostat with a built-in small circulation structure according to claim 2, characterized in that: The circulation support (1.1) comprises a water inlet body (5.1) and a connecting convex part (5.2) connecting two sides of the water inlet body (5.1); the connecting groove (1.2) comprises a first water inlet groove (1.3) and a second water inlet groove (1.4) which are connected; the first water inlet groove (1.3) is arranged 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 arranged in the connecting convex part (5.2) on one side and is connected to the first liquid outlet pipe port (6) to form a circulation channel (5.3).

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

5. The thermostat with a built-in small circulation structure according to claim 2, characterized in that: The housing (1) has a liquid inlet chamber (2.1) formed in it. The second control valve plate (5) divides the liquid inlet chamber (2.1) into an upper guide chamber (2.2) and a lower guide chamber (2.3) at the upper and lower boundaries. The circulation bracket (1.1) is placed in the lower guide chamber (2.3).

6. The thermostat with a built-in small circulation structure according to claim 4, characterized in that: The circulation support (1.1) slides downward along the outer shell (1), so that the second water inlet groove (1.4) and the first liquid outlet pipe opening (6) are arranged in an alternating manner, and the output diameter of the second water inlet groove (1.4) is forced to decrease.

7. The thermostat with a built-in small circulation structure according to claim 4, characterized in that: The first water inlet groove (1.3) has a peripheral side formed with a guide protrusion (2.4) extending upward, and the first control valve plate (4) slides up and down along the guide protrusion (2.4).

8. The thermostat with a built-in small circulation structure according to claim 1, characterized in that: The regulating element (3) further comprises an expansion member (3.1) penetrating the second control valve plate (5), and a push rod (3.2) connected to the expansion member (3.1), 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 (5), a positioning protrusion (3.5) is formed in the housing (1), and the baffle (3.3) is clamped on the positioning protrusion (3.5).

9. The thermostat with a built-in small circulation structure according to claim 1, characterized in that: A positioning protrusion (3.5) for mounting an adjusting element (3) is arranged in the housing (1), a clamping protrusion (3.6) is formed at the bottom of the positioning protrusion (3.5), and a clamping groove (3.7) for the clamping protrusion (3.6) to be placed is formed on the circulation bracket (1.1).

10. The 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 hole (2), and a sealing ring (4.2) is arranged in the sealing groove (4.1).

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