Electric thermostat

Abstract

The utility model belongs to the technical field of thermostats, and particularly provides an electric thermostat which comprises a shell, a drainage pipe, a sealing baffle, a valve element and an execution assembly, a water inlet channel is formed in the shell, the drainage pipe is provided with a drainage channel communicated with the water inlet end of the water inlet channel, the sealing baffle is arranged in the water inlet channel, and the execution assembly drives the valve element to move in the axial direction. Therefore, the cooling system can be switched among a large circulation mode, a small circulation mode, a mixed circulation mode and the like. According to the thermostat, the valve element is controlled to move through the execution assembly, paraffin in a traditional thermostat does not exist, leakage and failure of the paraffin are avoided, the execution assembly is electrically controlled, the action speed and the action stroke can be adjusted, and switching of all modes of the thermostat is quicker and more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermostats, and in particular relates to an electric thermostat. Background Art

[0002] The engine cooling system has two circulation modes: "small circulation" and "large circulation". The small circulation means that the coolant circulates only in the engine, while the large circulation means that the coolant circulates between the engine and the heat exchanger (water tank). In the early stage of engine operation, the engine temperature is relatively low. In order to enable the engine to reach the operating temperature quickly, the cooling system operates in a small circulation. When the engine reaches the operating temperature, the thermostat controls the cooling system to switch to a "large circulation" so that the coolant can flow into the water tank and the air can take away the heat. The higher the engine temperature, the greater the degree of opening of the thermostat, the greater the flow of coolant, and the better the heat dissipation effect.

[0003] The coolant is the core component of the engine cooling system, and the function of the thermostat is to control the coolant to switch between the "large cycle" and the "small cycle". At present, most of the ordinary paraffin thermostats on the market use the characteristics of paraffin expansion when heated. When the temperature of the coolant rises, the expansion of the paraffin pushes the push rod to move, so that the control valve of the large cycle gradually opens, achieving the purpose of improving the cooling effect. In the prior art, the thermal expansion effect of paraffin in the paraffin thermostat is poor, which makes the valve movement speed too slow, which is not conducive to achieving precise temperature control, and there is also a risk of paraffin leakage. Utility Model Content

[0004] The utility model provides an electric thermostat, aiming to solve the problems of slow valve action speed and paraffin leakage risk in the existing paraffin type thermostat.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide an electric thermostat, including

[0006] The shell has a through water inlet passage;

[0007] A drainage tube is provided at one end of the shell and has a drainage channel running through the axial direction thereof, one end of the drainage channel is connected to the water inlet end of the water inlet channel, the other end of the drainage channel extends in a direction away from the shell, and the diameter gradually shrinks in the extending direction, and the other end of the drainage channel forms a liquid inlet;

[0008] A sealing baffle, arranged at the water inlet end of the water inlet channel, the sealing baffle comprises a closed portion and an open portion, the open portion is arranged around the closed portion and is formed with a flow hole penetrating through the thickness direction of the open portion;

[0009] a valve core, which is annular and disposed in the drainage tube, wherein the outer peripheral surface of the valve core is slidably matched with the liquid inlet, and the valve core has a sealing posture of sliding into the drainage channel and abutting against the closing portion, and an opening posture of sliding out of the drainage channel and being spaced from the closing portion; and

[0010] The actuator assembly comprises a valve stem and an actuator. The valve stem is inserted through the sealing baffle and connected to the valve core. The actuator is arranged in the housing and is used to drive the valve stem to move along its own axial direction.

[0011] In a possible implementation, the drainage tube is threadably matched with a water inlet end of the water inlet channel.

[0012] In a possible implementation, a sealing groove is provided on the end surface of the water inlet end of the water inlet channel, the sealing groove is arranged around the drainage tube, and a sealing ring is provided in the sealing groove.

[0013] In a possible implementation, a plurality of the flow holes are provided, and the plurality of flow holes are spaced apart along the circumference of the sealing baffle.

[0014] In one possible implementation, the valve core includes a sealing portion and a connecting portion, the sealing portion is annular, and the outer peripheral surface of the sealing portion is slidably matched with the liquid inlet, the connecting portion includes a connecting ring and a connecting strip, the connecting ring is located at the center of the sealing portion, the connecting strip is connected to the connecting ring and the sealing portion, and the valve stem is connected to the connecting ring.

[0015] In a possible implementation, the water inlet end axis and the water outlet end axis of the water inlet channel intersect.

[0016] In a possible implementation, one end of the valve stem is accommodated in the water inlet channel, and the other end passes through the water inlet channel. The actuator is arranged outside the water inlet channel and connected to the protruding portion of the valve stem.

[0017] In a possible implementation, the actuator includes a drive motor and a gear respectively disposed on the housing, a threaded hole is formed at the axis of the gear, the valve stem is threadedly matched with the threaded hole, and the drive motor is transmission-connected to the gear.

[0018] In a possible implementation, the output shaft of the drive motor is connected to a worm, the worm is meshingly driven with a worm wheel, the worm wheel is coaxially connected to an intermediate wheel, and the intermediate wheel is meshingly driven with the gear.

[0019] In a possible implementation, a mounting plate is provided on the housing, and the drive motor and the gear are respectively provided on the mounting plate.

[0020] Compared with the prior art, the electric thermostat provided by the utility model has the following beneficial effects:

[0021] The electric thermostat provided by the utility model includes a shell, a drainage pipe, a sealing baffle, a valve core and an actuator. When in use, the electric thermostat is installed on the valve block. The valve block is formed with a coolant inlet, a small circulation outlet and an installation port. The installation port and the coolant inlet are axially corresponding. The drainage pipe is arranged in the installation port, and the outlet end of the water inlet channel forms a large circulation outlet. The shell forms a water inlet channel, the drainage pipe has a drainage channel connected to the water inlet end of the water inlet channel, the sealing baffle is arranged in the water inlet channel, and the actuator drives the valve core to move axially. When the valve core slides into the drainage channel until it abuts against the sealing baffle, the water inlet channel is closed, and the coolant flows out from the small circulation outlet to form a small circulation. When the valve core slides outside the drainage channel, there is a gap between the valve core and the sealing baffle, and the coolant can flow out of the water inlet channel through the gap and the flow hole. At this time, coolant flows out of both the large circulation outlet and the small circulation outlet, forming a mixed circulation. When the valve core moves to abut against the coolant inlet, the coolant completely enters the drainage pipe, and no coolant flows out of the small circulation outlet, forming a large circulation.

[0022] The utility model controls the movement of the valve core through the actuator component, and there is no paraffin in the traditional thermostat, thus avoiding the failure of paraffin leakage. In addition, the actuator component adopts electric control, and the action speed and action stroke can be adjusted, which helps to make the switching of various modes of the thermostat faster and more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an electric thermostat provided in one embodiment of the utility model when it is in a small cycle;

[0024] Figure 2 A schematic diagram of the structure of an electric thermostat provided in one embodiment of the utility model when it is in a large cycle;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A part;

[0026] Figure 4 This is a schematic diagram of the structure of the sealing baffle and the valve core in one embodiment of the utility model;

[0027] Figure 5 It is a structural schematic diagram of an execution component in one embodiment of the utility model.

[0028] Description of reference numerals:

[0029] 1. Electric thermostat;

[0030] 10. Shell; 11. Water inlet channel; 12. Mounting plate; 13. Sealing ring;

[0031] 20. Drainage tube;

[0032] 30. Sealing baffle; 31. Closing portion; 32. Opening portion; 321. Flow hole;

[0033] 40. valve core; 41. sealing portion; 42. connecting portion; 421. connecting ring; 422. connecting strip;

[0034] 50. actuator; 51. valve stem; 52. actuator; 521. drive motor; 522. gear; 523. worm wheel; 524. worm; 525. intermediate wheel; DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0038] Please also read Figures 1 to 5 , the electric thermostat 1 provided in the embodiment of the utility model is described below.

[0039] See also Figure 1 , Figure 2 and Figure 4The embodiment of the utility model provides an electric thermostat 1, including a housing 10, a drainage pipe 20, a sealing baffle 30, a valve core 40 and an actuator 50. The housing 10 has a through water inlet channel 11; the drainage pipe 20 is arranged at one end of the housing 10, and has a drainage channel that runs through its own axial direction, one end of the drainage channel is connected to the water inlet end of the water inlet channel 11, and the other end of the drainage channel extends in a direction away from the housing 10, and the diameter gradually shrinks in the extending direction, and the other end of the drainage channel forms a liquid inlet; the sealing baffle 30 is arranged at the water inlet end of the water inlet channel 11, and the sealing baffle 30 includes a closed portion 31 and an open portion 32, and the open portion 32 is arranged around the closed portion 31 and forms a A flow hole 321 that runs through the thickness direction of the valve core 40; the valve core 40 is annular and is arranged on the drainage tube 20, and the outer peripheral surface of the valve core 40 is slidably matched with the liquid inlet. The valve core 40 has a sealing posture of sliding into the drainage channel and abutting against the closing portion 31, and an open posture of sliding out of the drainage channel to be spaced from the closing portion 31; the actuator assembly 50 includes a valve stem 51 and an actuator 52, the valve stem 51 is passed through the sealing baffle 30 and is connected to the valve core 40, and the actuator 52 is arranged on the housing 10, and is used to drive the valve stem 51 to move along its own axial direction.

[0040] Compared with the prior art, the electric thermostat 1 provided in the embodiment of the utility model has the following beneficial effects:

[0041] The electric thermostat 1 provided by the embodiment of the utility model includes a housing 10, a drainage pipe 20, a sealing baffle 30, a valve core 40 and an actuator 50. When in use, the electric thermostat 1 is installed on a valve block, and a coolant inlet, a small circulation outlet and an installation port are formed on the valve block. The installation port and the coolant inlet are axially corresponding. The drainage pipe 20 is arranged in the installation port, and the outlet end of the water inlet channel 11 forms a large circulation outlet. The housing 10 forms a water inlet channel 11, and the drainage pipe 20 has a drainage channel connected to the water inlet end of the water inlet channel 11. The sealing baffle 30 is arranged in the water inlet channel 11. The actuator 50 drives the valve core 40 to move axially. When the valve core 40 slides into the drainage channel until it abuts against the sealing baffle 30, the water inlet channel 11 is closed, and the coolant flows out from the small circulation outlet to form a small circulation. When the valve core 40 slides out of the drainage channel, there is a gap between the valve core 40 and the sealing baffle 30, and the coolant can flow out of the water inlet channel 11 through the gap and the flow hole 321. At this time, coolant flows out of both the large circulation outlet and the small circulation outlet, forming a mixed circulation. When the valve core 40 moves to abut against the coolant inlet, the coolant completely enters the drainage pipe 20, and no coolant flows out of the small circulation outlet, forming a large circulation.

[0042] The embodiment of the utility model controls the movement of the valve core 40 through the actuator 50, and there is no paraffin in the traditional thermostat, thus avoiding the failure of paraffin leakage. In addition, the actuator 50 is electrically controlled, and the movement speed and movement stroke can be adjusted, which helps to make the switching of various modes of the thermostat faster and more accurate.

[0043] In the embodiment of the utility model, a water inlet channel 11 is formed inside the housing 10. The housing 10 can be obtained by injection molding or metal cutting process. The housing 10 is installed in Figure 1 The valve block shown can be fixed by fasteners such as screws. The housing 10 can be in the shape of a straight pipe or a curved pipe (such as 90°).

[0044] The drainage tube 20 is disposed at one end of the housing 10 adjacent to the valve body, and a portion of the drainage tube 20 extends into the mounting opening of the valve body for slidingly cooperating with the valve core 40. The drainage tube 20 is a reducer, and the large diameter end of the drainage tube 20 is connected to the housing 10, and the small diameter end of the drainage tube 20 is slidingly and sealingly cooperating with the valve core 40. In some possible embodiments, the drainage tube 20 and the housing 10 may be an integral component.

[0045] The sealing baffle 30 is arranged inside the shell 10. When the valve core 40 abuts against the sealing baffle 30, the water inlet channel 11 is closed, and all the coolant flows out from the small circulation outlet. When there is a gap between the valve core 40 and the sealing baffle 30, the water inlet channel 11 is opened. At this time, it is a large circulation or a mixed circulation. The mixed circulation means that coolant flows out of both the large circulation outlet and the small circulation outlet. When the valve core 40 moves to the maximum stroke, the end of the valve core 40 abuts against the coolant inlet. At this time, all the coolant is guided into the drainage tube 20 through the valve core 40, and then flows out from the large circulation outlet through the water outlet end of the shell 10. Since the valve core 40 and the liquid inlet of the drainage tube 20 are slidably matched, in order to avoid leakage of coolant, a sealing element can be arranged between the outer peripheral surface of the valve core 40 and the inner wall of the drainage tube 20.

[0046] The actuator 50 includes a valve stem 51 and an actuator 52. One end of the valve stem 51 is connected to the actuator 52, and the other end is connected to the valve core 40. The actuator 52 can be an electric telescopic rod, a telescopic cylinder, etc. arranged along the length direction of the valve stem 51, or a battery-driven gear 522 rack mechanism, a screw mechanism, etc., which can drive the valve stem 51 to achieve axial reciprocating movement. The actuator 52 can be arranged inside the housing 10. In order to prevent the coolant from corroding the electronic components, the actuator 52 can also be arranged outside the housing 10.

[0047] During operation, the vehicle host ECU sends a coolant temperature signal to the actuator 50. After receiving the temperature signal, the actuator 50 converts the temperature signal into the position that the valve core 40 needs to reach, and drives the connecting rod to drive the valve core 40 to the target position, thereby adjusting the switching ratio of the large and small cycles.

[0048] See also Figure 2 and Figure 3 In some possible embodiments, the drainage tube 20 is threadedly matched with the water inlet end of the water inlet channel 11. The drainage tube 20 has an external thread, and the water inlet end of the water inlet channel 11 is formed with an internal thread, which facilitates the assembly of the two into one.

[0049] See also Figure 2 and Figure 3 In some possible embodiments, a sealing groove is provided on the water inlet end face of the water inlet channel 11, and the sealing groove is arranged around the drainage tube 20. A sealing ring 13 is provided in the sealing groove, and the sealing ring 13 abuts against the end face of the valve body, which can prevent coolant leakage from the joint surface of the valve body and the shell 10.

[0050] See also Figure 4 In some possible embodiments, a plurality of flow holes 321 are arranged at intervals along the circumference of the sealing baffle 30, so that the coolant flows more evenly. The flow holes 321 can be in the shape of a circular hole, a square hole, a waist-shaped hole, a fan-shaped hole, etc. The flow holes 321 can be a closed loop hole, or a slotted structure arranged at the edge of the sealing baffle 30, which can allow the coolant to pass through.

[0051] See also Figure 4 In some possible embodiments, the valve core 40 includes a sealing portion 41 and a connecting portion 42. The sealing portion 41 is annular, and the outer peripheral surface of the sealing portion 41 is slidably matched with the liquid inlet. The connecting portion 42 includes a connecting ring 421 and a connecting strip 422. The connecting ring 421 is located at the center of the sealing portion 41, and the connecting strip 422 is connected to the connecting ring 421 and the sealing portion 41. The connecting ring 421, the connecting strip 422 and the sealing portion 41 can be an integrated structure, or can be combined into one by welding, bonding, etc. The valve stem 51 is connected to the connecting ring 421 by screws and nuts, adhesive, retaining rings, etc.

[0052] See also Figure 1 and Figure 2 In some possible embodiments, the axis of the water inlet end of the water inlet channel 11 intersects with the axis of the water outlet end, the shell 10 is a curved pipe, and the intersection angle between the water inlet end and the water outlet end can be 30°, 50°, 90°, etc.

[0053] See also Figure 1 and Figure 2 In some possible embodiments, one end of the valve stem 51 is accommodated in the water inlet channel 11, and the other end passes through the water inlet channel 11. The actuator 52 is disposed outside the water inlet channel 11 and connected to the protruding portion of the valve stem 51.

[0054] In this embodiment, the actuators 52 are arranged outside the water inlet channel 11 and will not contact the coolant in the water inlet channel 11, thereby avoiding malfunctions due to liquid corrosion or jamming of the mechanisms due to rust.

[0055] In order to prevent leakage of coolant, a rubber sealing element may be provided at the position where the valve stem 51 and the housing cooperate.

[0056] See also Figure 5 In some possible embodiments, the actuator 52 includes a drive motor 521 and a gear 522 respectively arranged on the housing 10. A threaded hole is opened on the axis of the gear 522, and the valve stem 51 is threadedly matched with the threaded hole. The drive motor 521 is connected to the gear 522 by transmission. The drive motor 521 controls the gear 522 to rotate forward or flip, and drives the valve stem 51 to reciprocate along the axial direction, thereby adjusting the switching ratio of the large and small cycles.

[0057] See also Figure 5 In some possible embodiments, the output shaft of the driving motor 521 is connected to a worm 524 , the worm 524 is meshingly driven with a worm wheel 523 , the worm wheel 523 is coaxially connected to an intermediate wheel 525 , and the intermediate wheel 525 is meshingly driven with the gear 522 .

[0058] See also Figure 5 In some possible embodiments, a mounting plate 12 is provided on the housing 10 , and the driving motor 521 and the gear 522 are respectively provided on the mounting plate 12 .

[0059] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the utility model specification has recorded various combination embodiments and can support different combination embodiments.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Electric thermostat, characterized in that: include: The shell has a through water inlet passage; A drainage tube is provided at one end of the shell and has a drainage channel running through the axial direction thereof, one end of the drainage channel is connected to the water inlet end of the water inlet channel, the other end of the drainage channel extends in a direction away from the shell, and the diameter gradually shrinks in the extending direction, and the other end of the drainage channel forms a liquid inlet; A sealing baffle, arranged at the water inlet end of the water inlet channel, the sealing baffle comprises a closed portion and an open portion, the open portion is arranged around the closed portion and is formed with a flow hole penetrating through the thickness direction of the open portion; a valve core, which is annular and disposed in the drainage tube, wherein the outer peripheral surface of the valve core is slidably matched with the liquid inlet, and the valve core has a sealing posture of sliding into the drainage channel and abutting against the closing portion, and an opening posture of sliding out of the drainage channel and being spaced from the closing portion; as well as The actuator assembly comprises a valve stem and an actuator. The valve stem is inserted through the sealing baffle and connected to the valve core. The actuator is arranged in the housing and is used to drive the valve stem to move along its own axial direction.

2. The electric thermostat according to claim 1, characterized in that: The drainage pipe is threadably matched with the water inlet end of the water inlet channel.

3. The electric thermostat according to claim 1, characterized in that: A sealing groove is provided on the water inlet end surface of the water inlet channel, the sealing groove is arranged around the drainage pipe, and a sealing ring is arranged in the sealing groove.

4. The electric thermostat according to claim 1, characterized in that: There are a plurality of flow holes, and the plurality of flow holes are spaced apart along the circumference of the sealing baffle.

5. The electric thermostat according to claim 1, characterized in that: The valve core includes a sealing part and a connecting part, the sealing part is annular, and the outer peripheral surface of the sealing part is slidably matched with the liquid inlet. The connecting part includes a connecting ring and a connecting strip, the connecting ring is located at the center of the sealing part, the connecting strip is connected to the connecting ring and the sealing part, and the valve stem is connected to the connecting ring.

6. The electric thermostat according to claim 1, characterized in that: The water inlet end axis and the water outlet end axis of the water inlet channel intersect.

7. The electric thermostat according to claim 6, characterized in that: One end of the valve stem is accommodated in the water inlet channel, and the other end passes through the water inlet channel. The actuator is arranged outside the water inlet channel and connected to the protruding portion of the valve stem.

8. The electric thermostat according to claim 1, characterized in that: The actuator comprises a driving motor and a gear respectively arranged on the housing, a threaded hole is opened on the axis of the gear, the valve stem is threadedly matched with the threaded hole, and the driving motor is drivingly connected to the gear.

9. The electric thermostat according to claim 8, characterized in that: The output shaft of the driving motor is connected with a worm, the worm is meshed with a worm wheel, the worm wheel is coaxially connected with an intermediate wheel, and the intermediate wheel is meshed with the gear for transmission.

10. The electric thermostat according to claim 8, characterized in that: The housing is provided with a mounting plate, and the driving motor and the gear are respectively arranged on the mounting plate.

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