Thermostat assembly

Abstract

The utility model relates to the technical field of engine cooling equipment, and particularly discloses a thermostat assembly which is communicated with an engine cylinder cover water outlet, a water pump, a radiator, a warm air water tank and a supercharger, a thermostat seat is provided with a first concave cavity, and a cavity opening of the first concave cavity is communicated with the engine cylinder cover water outlet; the first concave cavity is communicated with the input end of the radiator through a first butt joint and a pipeline; a water temperature sensor is arranged on the first butt joint; the thermostat base is further provided with a second concave cavity extending into the first concave cavity, a thermostat is arranged in the second concave cavity, and the cavity bottom of the second concave cavity is communicated with the first concave cavity through a small circulation hole. A cavity opening of the second concave cavity communicates with the output end of the radiator through a water inlet pipe. The second butt joint is communicated with the side wall of the second concave cavity and is communicated with the input end of the water pump through a pipeline; according to the thermostat assembly, the overall structure of the thermostat assembly is optimized, the overall height of the thermostat is reduced, and a customer can conveniently match engines in different installation states.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cooling equipment, in particular to a thermostat assembly. Background Art

[0002] A thermostat is a valve that controls the flow of coolant. It's an automatic temperature-regulating device, typically containing a temperature-sensing component. It uses thermal expansion or contraction to open and close the flow of air, gas, or liquid. The thermostat assembly is a crucial component of the engine cooling system, primarily used to cool the engine once it reaches a certain temperature.

[0003] The utility model patent with publication number CN218030354U discloses a thermostat assembly, an engine and engineering machinery. By integrating the pipe interfaces required for the engine's large and small circulation, the heater water tank water inlet, and the supercharger water return on the casing, it is convenient for the layout of the engine cooling system pipelines. However, for today's increasingly integrated engines, especially range extenders with integrated generators, the utilization of space needs to be more extreme, and thus the structure of the thermostat assembly needs to be further optimized and improved. Utility Model Content

[0004] The purpose of the utility model is to provide a thermostat assembly, which optimizes the overall structure of the thermostat assembly, reduces the overall height of the thermostat, and facilitates customers to match engines with different installation states.

[0005] The utility model is realized by the following technical solutions: a thermostat assembly is connected to the water outlet of the engine cylinder head, a water pump, a radiator, a heater water tank and a supercharger, and includes a thermostat seat, a first concave cavity is provided on the thermostat seat, and the cavity opening of the first concave cavity is connected to the water outlet of the engine cylinder head; a first pair of joints is connected to the first concave cavity, and the first pair of joints is connected to the input end of the radiator through a pipe;

[0006] A water temperature sensor is provided on the first docking head;

[0007] The thermostat seat is further provided with a second concave cavity, which extends into the first concave cavity. The thermostat is provided in the second concave cavity. The bottom of the second concave cavity is connected to the first concave cavity through a small circulation hole. The cavity opening of the second concave cavity is connected to the output end of the radiator through a water inlet pipe.

[0008] It also includes a second pair of joints, which are communicated with the side wall of the second concave cavity and are communicated with the input end of the water pump through a pipeline.

[0009] Furthermore, the first pair of joints, the water inlet pipe and the second pair of joints are circumferentially arranged about the first concave cavity.

[0010] Furthermore, a first threaded hole is provided on the first docking joint, and the water temperature sensor is threadedly engaged with the first threaded hole.

[0011] Furthermore, a third pair of joints is provided on the second butt joint, and the third pair of joints is connected to the output end of the supercharger through a pipeline.

[0012] Furthermore, a fourth joint is provided on the first concave cavity, and the fourth joint is connected to the input end of the heater water tank through a pipeline.

[0013] Furthermore, a fifth joint is provided on the side wall of the second concave cavity, and the fifth joint is connected to the output end of the heater water tank through a pipeline.

[0014] Furthermore, the water inlet pipe is connected to the cavity opening of the second concave cavity through a first flange joint.

[0015] Furthermore, the opening of the first concave cavity is connected to the water outlet of the engine cylinder head through a second flange joint.

[0016] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0017] 1. The second cavity extends into the first cavity, and the first pair of joints, the water inlet pipe, and the second pair of joints are arranged circumferentially about the first cavity. This allows the entire thermostat assembly to have a smaller height. When installed at the water outlet of the engine cylinder head, it does not protrude too much and does not occupy much space. This is conducive to improving overall integration and completing the full functions of the thermostat in a relatively narrow space.

[0018] 2. The fourth and fifth connectors are both located on the side of the first cavity, and their height does not exceed that of the thermostat seat, making the entire thermostat assembly flat and not taking up too much space. The overall structure has been optimized, the thermostat assembly is compact, and the overall height of the thermostat is reduced, making it easier for customers to match it with various engines, especially range extenders with motors installed at the rear end of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a thermostat assembly provided by the utility model;

[0021] Figure 2 A schematic diagram of the exploded structure of a thermostat assembly provided by the utility model;

[0022] Icons: 1. Thermostat seat, 2. First concave cavity, 21. First pair of joints, 22. Water temperature sensor, 23. Fourth joint, 24. Second flange joint, 3. Second concave cavity, 31. Small circulation hole, 32. Water inlet pipe, 321. First flange joint, 33. Second pair of joints, 34. Third pair of joints, 35. Fifth joint, 4. Thermostat. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0025] Reference Figures 1 to 2 As shown, this embodiment provides a thermostat assembly, which is connected to the water outlet of the engine cylinder head, a water pump, a radiator, a heater water tank and a supercharger, including a thermostat seat 1. A first concave cavity 2 is provided on the thermostat seat 1. The cavity opening of the first concave cavity 2 is connected to the water outlet of the engine cylinder head. In specific implementation, the cavity opening of the first concave cavity 2 is connected to the water outlet of the engine cylinder head through a second flange joint 24. A rubber sealing ring is provided between the second flange joint 24 and the water outlet of the engine cylinder head to enhance the sealing effect; the coolant absorbs heat from the cylinder wall in the cylinder body water jacket, and the water temperature gradually increases; the heated coolant continues to flow, enters the cylinder head water jacket through the special hole on the cylinder head gasket, and continues to absorb heat; the heated coolant flows out of the engine cylinder head water outlet and enters the first concave cavity 2.

[0026] A first pair of joints 21 is connected to the first cavity 2, and the first pair of joints 21 is connected to the input end of the radiator through a pipe; a water temperature sensor 22 is provided on the first pair of joints 21; the water temperature sensor 22 contains a thermistor inside, and the resistance value changes with the increase of temperature, which is used to feedback the water temperature at the water outlet of the engine cylinder head.

[0027] like Figure 2 As shown, a second concave cavity 3 is further provided on the thermostat seat 1, and the second concave cavity 3 extends into the first concave cavity 2. A thermostat 4 is provided in the second concave cavity 3. The thermostat 4 is a wax-type thermostat 4, and the interior of the thermostat 4 is filled with temperature-sensitive wax. The melting temperature of the temperature-sensitive wax is 88°C. When the temperature is reached, the temperature-sensitive wax melts and expands, pushing the thermostat 4 push rod to open the thermostat 4 valve; the bottom of the second concave cavity 3 is connected to the first concave cavity 2 through a small circulation hole 31; the cavity mouth of the second concave cavity 3 is connected to the output end of the radiator through a water inlet pipe 32; the water inlet pipe 32 is connected to the cavity mouth of the second concave cavity 3 through a first flange joint 321, which is convenient for disassembly. At the same time, a rubber sealing ring is also provided between the second flange joint 24 and the cavity mouth of the second concave cavity 3.

[0028] It also includes a second pair of joints 33, which are communicated with the side wall of the second concave cavity 3 and the second pair of joints 33 are communicated with the input end of the water pump through a pipeline.

[0029] like Figure 1 and Figure 2 As shown, in a specific implementation, when the temperature of the coolant entering the first concave cavity 2 from the water outlet of the engine cylinder head is low, usually below 88°C, the thermostat 4 blocks the liquid returning from the water inlet pipe 32. At this time, there is no need to cool the coolant. The coolant directly enters the second concave cavity 3 from the small circulation hole 31, and is then discharged from the second joint 33 to the water pump, completing the circulation of the engine coolant. This process is a small cycle.

[0030] When the coolant water temperature reaches 88°C, the temperature-sensitive wax in the thermostat 4 begins to melt and expand, pushing the thermostat 4 push rod to slowly open the thermostat 4 valve. The liquid returning from the water inlet pipe 32 can be discharged from the second pair of joints 33, and then a part of the coolant is discharged from the first pair of joints 21. When passing through the radiator, the coolant exchanges heat with the outside air through the radiator pipe, dissipating heat to the atmosphere, thereby being cooled. The coolant discharged from the radiator flows back into the second concave cavity 3 from the water inlet pipe 32, and is then discharged to the water pump from the second pair of joints 33. This is a large circulation; at the same time, the small circulation hole 31 is not completely closed, and a part of the coolant is still undergoing a small circulation.

[0031] As the temperature of the coolant rises above 88°C, the temperature-sensitive wax completely melts. At this time, the thermostat 4 completely closes the small circulation hole 31, and the small circulation is interrupted, leaving only the large circulation, and the coolant is cooled mainly through the radiator.

[0032] More specifically, Figure 1 and Figure 2As shown, the first pair of joints 21, the water inlet pipe 32 and the second pair of joints 33 are arranged circumferentially about the first concave cavity 2, so that the entire thermostat 4 assembly can have a smaller height. When installed at the water outlet of the engine cylinder head, it will not protrude too much and will not take up much space, which is conducive to improving the overall integration and completing all the functions of the thermostat 4 in a relatively small space.

[0033] More specifically, Figure 2 As shown, a first threaded hole is connected to the first pair of joints 21, and the water temperature sensor 22 is threadedly engaged with the first threaded hole. The first pair of joints 21 is connected to the side wall of the first concave cavity 2, and the water temperature sensor 22 is also located on the side of the first concave cavity 2 and does not exceed the height of the thermostat seat 1, so that the overall space occupied is small.

[0034] like Figure 1 and Figure 2 As shown, a third pair of connectors 34 is connected to the second pair of connectors 33. The third pair of connectors 34 is connected to the output of the supercharger via a pipe. Similarly, the third pair of connectors 34 is also located on the side of the thermostat base 1, not exceeding the height of the thermostat base 1, thereby minimizing the overall space occupied.

[0035] More specifically, the water inlet of the supercharger is connected to the water outlet of the oil filter seat on the engine cylinder block through a pipe. The coolant enters the oil filter seat through the hole on the cylinder block and then enters the oil cooler. One path of the coolant will enter the supercharger to cool the supercharger. The supercharger here is the supercharger of the engine. By pressurizing the intake air, more air enters the engine for combustion; the coolant after cooling the supercharger enters the second pair of joints 33 from the third pair of joints 34. Because the water flow rate of this path is small, it has little effect on the water temperature of the coolant, and then directly enters the water pump to continue circulation. Moreover, if the thermostat 4 senses that the water temperature is high, the thermostat 4 will open and perform a large cycle to cool down.

[0036] like Figure 1 and Figure 2 As shown, a fourth connector 23 is provided on the first cavity 2, connected to the input of the heater tank via a pipe. Meanwhile, a fifth connector 35 is provided on the sidewall of the second cavity 3, connected to the output of the heater tank via a pipe. High-temperature coolant entering the first cavity 2 from the engine cylinder head outlet is partially discharged from the fourth connector 23 to the heater tank. After cooling in the heater tank, it enters the second cavity 3 through the fifth connector 35 and is then discharged from the second pair of connectors 33 to the water pump. When heating is required, the coolant passes through the vehicle's heating system, transferring heat from the heater tank into the vehicle, and then returns to the engine. This cycle is not controlled by the thermostat 4 and begins as soon as the heater is turned on.

[0037] It should be noted that the fourth connector 23 and the fifth connector 35 are both located on the side of the first cavity 2, and their height does not exceed that of the thermostat seat 1, so that the entire thermostat 4 assembly is flat and does not take up much space; the overall structure has been optimized, and the thermostat 4 assembly structure is compact, which reduces the overall height of the thermostat 4, making it easier for customers to match it with various engines, especially the range extender with an electric motor installed at the rear end of the engine.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A thermostat assembly connected to the water outlet of the engine cylinder head, the water pump, the radiator, the heater water tank and the supercharger, characterized by: The thermostat seat (1) comprises a first concave cavity (2) provided on the thermostat seat (1), the cavity opening of the first concave cavity (2) being in communication with the water outlet of the engine cylinder cover; a first pair of joints (21) being in communication with the first concave cavity (2), the first pair of joints (21) being in communication with the input end of the radiator via a pipeline; The first pair of joints (21) is provided with a water temperature sensor (22); The thermostat seat (1) is further provided with a second concave cavity (3), the second concave cavity (3) extending into the first concave cavity (2), a thermostat (4) being provided in the second concave cavity (3), the bottom of the second concave cavity (3) being in communication with the first concave cavity (2) via a small circulation hole (31); the cavity opening of the second concave cavity (3) being in communication with the output end of the radiator via a water inlet pipe (32); It also includes a second pair of joints (33), the second pair of joints (33) being in communication with the side wall of the second concave cavity (3), and the second pair of joints (33) being in communication with the input end of the water pump through a pipeline.

2. The thermostat assembly according to claim 1, characterized in that: The first pair of joints (21), the water inlet pipe (32) and the second pair of joints (33) are circumferentially arranged about the first concave cavity (2).

3. The thermostat assembly according to claim 2, characterized in that: The first pair of joints (21) are connected with a first threaded hole, and the water temperature sensor (22) is threadably engaged with the first threaded hole.

4. The thermostat assembly according to claim 2, characterized in that: The second pair of joints (33) is connected to a third pair of joints (34), and the third pair of joints (34) is connected to the output end of the supercharger through a pipeline.

5. The thermostat assembly according to claim 2, characterized in that: A fourth joint (23) is provided on the first concave cavity (2), and the fourth joint (23) is connected to the input end of the heater water tank through a pipeline.

6. The thermostat assembly according to claim 5, characterized in that: A fifth joint (35) is provided on the side wall of the second concave cavity (3), and the fifth joint (35) is connected to the output end of the heater water tank through a pipeline.

7. The thermostat assembly according to claim 6, characterized in that: The water inlet pipe (32) is connected to the cavity opening of the second concave cavity (3) via a first flange joint (321).

8. The thermostat assembly according to claim 1, characterized in that: The cavity opening of the first concave cavity (2) is connected to the water outlet of the engine cylinder cover via a second flange joint (24).

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