CN214007298U - Thermostat shell, thermostat assembly and engine cooling system - Google Patents

Abstract

An embodiment of the utility model provides a thermostat casing, thermostat assembly and engine cooling system. The utility model provides a thermostat casing includes: a mounting cavity; the large circulation channel comprises a first large circulation channel, a second large circulation channel and a large circulation outlet, the first end of the first large circulation channel and the first end of the second large circulation channel are both connected with the mounting cavity, and the second end of the first large circulation channel and the second end of the second large circulation channel are communicated with the large circulation outlet; a small circulation channel. The utility model also provides a thermostat assembly, including thermostat and above-mentioned thermostat casing. The utility model also provides an engine cooling system, including engine organism and foretell thermostat assembly. The utility model provides a thermostat casing has increased the intercommunication area between big circulation channel and the installation cavity, reduces the big circulation velocity of flow, reduces cooling system's resistance, improves the big circulation flow field.

Description

Thermostat shell, thermostat assembly and engine cooling system

Technical Field

The embodiment of the utility model provides a relate to the engine technology, especially relate to a thermostat casing, thermostat assembly and engine cooling system.

Background

The thermostat is a component in a cooling circulation system of an automobile engine, and has the function of adjusting the temperature of engine cooling liquid so as to ensure that the automobile engine cooling liquid is in an optimal temperature state.

Among the prior art, the thermostat assembly includes thermostat casing and thermostat, and the thermostat casing is provided with major loop channel, little loop channel and is used for installing the installation cavity of thermostat, and the installation cavity is provided with the open end, and the open end is used for installing the disk seat of thermostat and as the inlet of thermostat casing, and the inlet of major loop channel is located the lateral wall of installation cavity, and the inlet of little loop channel is located the installation cavity and keeps away from the tip of open end one side. The thermostat is provided with a cylindrical valve, and one end of the cylindrical valve is open and the other end is provided with a water outlet. When the temperature of the cooling liquid entering the installation cavity is low, the cylindrical valve is abutted against the valve seat, the side wall of the cylindrical valve plugs the liquid inlet of the large circulation channel, and the cooling liquid flows into the small circulation channel through the water outlet of the cylindrical valve; when the temperature of the cooling liquid entering the mounting cavity is high, the cylindrical valve moves in the direction far away from the valve seat along the axis of the cylindrical valve, the large circulation channel is communicated with the mounting cavity, the side wall of the cylindrical valve plugs the liquid inlet of the small circulation channel, and the cooling liquid flows out of the large circulation channel at the moment.

However, the flow rate and pressure drop of the coolant entering the large circulation passage are affected by the opening degree of the cylindrical valve, and the communication area between the large circulation passage and the installation cavity is small, resulting in a large resistance of the cooling system and a high flow rate of the large circulation.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a thermostat casing, thermostat assembly and engine cooling system to the velocity of flow and the pressure drop of the coolant liquid that solve current thermostat assembly entering in the major cycle passageway receive the influence of the aperture of cylindric valve, and the intercommunication area between major cycle passageway and the installation cavity is less, leads to the great and great high problem of the velocity of flow of major cycle of cooling system's resistance.

According to the utility model discloses an aspect provides a thermostat housing, include:

the mounting cavity is provided with an opening end;

the large circulation channel comprises a first large circulation channel, a second large circulation channel and a large circulation outlet, the first end of the first large circulation channel and the first end of the second large circulation channel are both connected with the installation cavity, and the second end of the first large circulation channel and the second end of the second large circulation channel are communicated with the large circulation outlet;

the first end of the small circulation channel is connected with the installation cavity, and the second end of the small circulation channel is communicated with the small circulation outlet;

when the thermostat is in a closed state, the small circulation channel is communicated with the installation cavity, and the first end of the first large circulation channel and the first end of the second large circulation channel are both interrupted with the installation cavity; when the thermostat is in an open state, the first end of the first large circulation channel and the first end of the second large circulation channel are both communicated with the installation cavity, and the small circulation channel is interrupted from the installation cavity.

In an optional implementation manner, the first end of the small circulation channel is located between the first end of the first large circulation channel and the first end of the second large circulation channel along a first direction, wherein the first direction is an axial direction of the installation cavity. It can be understood by those skilled in the art that with the above arrangement, when the valve of the thermostat moves inside the installation cavity, it is possible to block the first end of the small circulation passage or block the first end of the first large circulation passage and the first end of the second large circulation passage.

In an alternative implementation, the cover plate of the thermostat is located at the first end of the second main circulation passage, and the length of the first end of the second main circulation passage in the first direction is greater than the length of the cover plate of the thermostat extending when the thermostat is in the open state. As can be understood by those skilled in the art, the length of the first end of the second large circulation channel along the first direction is greater than the length of the cover plate of the thermostat in the open state of the thermostat, so that the second large circulation channel can be ensured not to obstruct the thermostat from opening, and the small circulation channel can be completely sealed when the thermostat is in the open state.

In an optional implementation manner, the mounting cavity further comprises a sealing ring, the sealing ring is fixedly connected with the inner wall of the mounting cavity, and the sealing ring is located between the first end of the first large circulation channel and the first end of the small circulation channel. As can be understood by those skilled in the art, the sealing effect of the installation cavity and the thermostat is improved by arranging the sealing ring, and the first large circulation channel is prevented from being communicated with the small circulation channel.

According to another aspect of the embodiments of the present invention, there is provided a thermostat assembly, comprising a thermostat and the thermostat housing;

the thermostat comprises a cylindrical valve and a cover plate, the cylindrical valve and the cover plate are positioned in the installation cavity, and the cover plate is positioned at the first end of the cylindrical valve and is fixedly connected with the cylindrical valve;

the cartridge valve is movable in a first direction from a first position, in which the small circulation passage communicates with the mount chamber, to a second position, in which the first and second large circulation passages both communicate with the mount chamber, and in a direction opposite to the first direction from the second position to the first position. As will be appreciated by those skilled in the art, when the barrel valve is in the first position, cooling fluid within the mounting chamber flows out of the small circulation passage; when the cylindrical valve is located at the second position, cooling liquid in the installation cavity flows out of the first large circulation channel and the second large circulation channel, the communication area between the large circulation channels and the installation cavity is increased, resistance of a cooling system can be reduced, the flow rate of large circulation is reduced, and the flow field of the large circulation is improved.

In an optional implementation manner, the mounting cavity further comprises a support plate, the support plate is fixedly connected with the inner wall of the mounting cavity, the support plate is located between the first end of the second large circulation channel and the first end of the small circulation channel, a first through hole is formed in the radial center of the support plate, and a water outlet is formed in the edge of the first through hole; when the cylindrical valve is located at the first position, the cover plate covers the support plate to seal the water outlet;

the cover plate faces the side face of one side of the cylindrical valve, a connecting rod is arranged, the first end of the connecting rod is fixedly connected with the cover plate, and the second end of the connecting rod penetrates through the first through hole and then is fixedly connected with the end portion of the cylindrical valve. As can be understood by those skilled in the art, the thermostat controls the communication state of the second large circulation channel and the installation cavity through the cover plate and the support plate, and controls the communication state of the first large circulation channel and the small circulation channel and the installation cavity through the cylindrical valve.

In an optional implementation manner, the connecting rod is provided with a limiting portion, the limiting portion is located on one side of the support plate facing the barrel valve, a conical spring is arranged between the limiting portion and the support plate, the conical spring is sleeved on the connecting rod, a small-diameter end of the conical spring abuts against the limiting portion, and a large-diameter end of the conical spring abuts against the support plate. As can be understood by those skilled in the art, by arranging the conical spring between the limiting part and the support plate, when the temperature of the cooling liquid in the installation cavity is low, the cover plate can be ensured to be tightly attached to the support plate, and the cooling liquid in the installation cavity is prevented from flowing out of the second large circulation channel.

In an optional implementation manner, the temperature sensing device further comprises a valve seat, a temperature sensing bulb and a push rod, wherein the valve seat is fixedly connected with the opening end of the installation cavity, and a second through hole is formed in the valve seat along the center of the valve seat in the radial direction;

the temperature sensing bulb is provided with a step surface, and the step surface is abutted against the edge of the second through hole; the temperature sensing device is characterized in that a temperature sensing medium is arranged in the temperature sensing bag, the volume of the temperature sensing medium can change along with the temperature change, and the first end of the push rod penetrates through the temperature sensing bag and extends into the temperature sensing medium. As can be understood by those skilled in the art, the cooling liquid enters the installation cavity from the opening end of the installation cavity, when the temperature of the cooling liquid is higher, the volume of the temperature sensing medium in the temperature sensing bulb is increased, the push rod is extruded to move, and the thermostat is opened.

In an optional implementation manner, a spring seat is arranged in the middle of the push rod, a sleeve is arranged at one side, facing the thermal bulb, of the end of the cylindrical valve, a second end of the push rod is located inside the sleeve, a spring is sleeved outside the sleeve, a first end of the spring abuts against the end of the cylindrical valve, and a second end of the spring abuts against the spring seat. As can be understood by those skilled in the art, the thermostat can be protected by the arrangement, namely when the barrel valve abuts against the support plate and the push rod continues to move, the spring is compressed, and the thermostat is prevented from being damaged due to the fact that the barrel valve impacts the support plate.

According to another aspect of the embodiment of the present invention, there is provided an engine cooling system, including an engine body and the thermostat assembly;

the cooling water path in the engine body is communicated with the thermostat assembly, and the temperature sensing bulb of the thermostat assembly senses the temperature of the cooling liquid in the cooling water path so as to control the cooling liquid in the cooling water path to flow out of the large circulation outlet or the small circulation outlet.

As can be understood by those skilled in the art, the thermostat housing of the present invention comprises a mounting cavity, a large circulation channel and a small circulation channel. The installation cavity is provided with the open end. The large circulation channel comprises a first large circulation channel, a second large circulation channel and a large circulation outlet, the first end of the first large circulation channel and the first end of the second large circulation channel are both connected with the installation cavity, and the second end of the first large circulation channel and the second end of the second large circulation channel are communicated with the large circulation outlet. The first end of the small circulation channel is connected with the installation cavity, and the second end of the small circulation channel is communicated with the small circulation outlet. When the thermostat is in a closed state, the small circulation channel is communicated with the installation cavity, and the first end of the first large circulation channel and the first end of the second large circulation channel are both interrupted with the installation cavity; when the thermostat is in an open state, the first end of the first large circulation channel and the first end of the second large circulation channel are communicated with the installation cavity, and the small circulation channel is interrupted with the installation cavity. Like this, when getting into the inside coolant liquid temperature of installation cavity when higher, the inside thermostat of installation cavity becomes the open mode by closed state, and the coolant liquid in the installation cavity flows from first big circulating channel and the big circulating channel of second, compares in prior art, has increased the area of intercommunication between big circulating channel and the installation cavity, and cooling system's resistance reduces to some extent, can reduce the velocity of flow of major cycle simultaneously and improve the flow field of major cycle.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a thermostat assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another thermostat assembly provided in an embodiment of the present invention;

fig. 3 is a schematic partial structural diagram of a thermostat according to an embodiment of the present invention.

Description of reference numerals:

100-thermostat housing; 110-a mounting cavity;

120-large circulation channel; 121-first large circulation channel;

122-second major circulation channel; 123-large circulation outlet;

130-small circulation channel; 131-a small circulation outlet;

140-a sealing ring; 200-thermostat;

210-a cover plate; 211-connecting rod;

212-a limiting part; 220-a barrel valve;

221-a sleeve; 222-a first spring;

230-a plate; 231 — a first via;

240-conical spring; 250-a valve seat;

260-temperature sensing bulb; 261-step surface;

270-a push rod; 280-a bracket;

a 281-spring seat; 282-connecting arm;

290-second spring.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

The existing thermostat assembly comprises a thermostat shell and a thermostat, wherein the thermostat shell is provided with a large circulation channel, a small circulation channel and an installation cavity for installing the thermostat, the installation cavity is provided with an open end, the open end is used for installing a valve seat of the thermostat and serving as a liquid inlet of the thermostat shell, and the liquid inlet of the small circulation channel and the liquid inlet of the large circulation channel are respectively located on the side wall of the installation cavity. The thermostat is provided with a cylindrical valve, and the liquid inlet of the small circulation channel or the liquid inlet of the large circulation channel can be plugged when the cylindrical valve moves in the installation cavity. Specifically, when the temperature of the cooling liquid entering the installation cavity is low, the cylindrical valve is abutted against the valve seat, the side wall of the cylindrical valve plugs the liquid inlet of the large circulation channel, and the cooling liquid flows into the small circulation channel through the water outlet of the cylindrical valve; when the temperature of the cooling liquid entering the mounting cavity is high, the cylindrical valve moves in the direction far away from the valve seat along the axis of the cylindrical valve, the large circulation channel is communicated with the mounting cavity, the side wall of the cylindrical valve plugs the liquid inlet of the small circulation channel, and the cooling liquid flows out of the large circulation channel at the moment. However, when the temperature of the coolant entering the mounting chamber is high, the communication area between the large circulation passage and the mounting chamber is affected by the opening degree of the thermostat, and the communication area between the large circulation passage and the mounting chamber is small, resulting in a large resistance of the cooling system and a high flow rate of the large circulation.

After repeated consideration and verification, the inventor finds that if a bypass water path is provided on the thermostat housing, the coolant entering the mounting chamber of the thermostat housing can flow from the bypass water path into the large circulation passage. Specifically, when the temperature of the cooling liquid in the installation cavity is low, the thermostat in the installation cavity blocks the large circulation channel and the bypass water channel, and the cooling liquid flows out of the installation cavity from the small circulation channel; when the temperature of the cooling liquid in the installation cavity is high, the thermostat plugs the small circulation channel, and the cooling liquid flows out of the installation cavity from the large circulation channel and the bypass water channel, so that the communication area between the large circulation channel and the installation cavity is increased, the resistance of a cooling system is reduced, the flow rate of the large circulation is reduced, and the flow field of the large circulation is improved.

In view of the above, the inventor designs a thermostat housing, which includes a mounting cavity, a large circulation passage and a small circulation passage. The installation cavity is provided with the open end. The large circulation channel comprises a first large circulation channel, a second large circulation channel and a large circulation outlet, the first end of the first large circulation channel and the first end of the second large circulation channel are both connected with the installation cavity, and the second end of the first large circulation channel and the second end of the second large circulation channel are communicated with the large circulation outlet. The first end of the small circulation channel is connected with the installation cavity, and the second end of the small circulation channel is communicated with the small circulation outlet. When the thermostat is in a closed state, the small circulation channel is communicated with the installation cavity, and the first end of the first large circulation channel and the first end of the second large circulation channel are both interrupted with the installation cavity; when the thermostat is in an open state, the first end of the first large circulation channel and the first end of the second large circulation channel are communicated with the installation cavity, and the small circulation channel is interrupted with the installation cavity. When the temperature of the cooling liquid entering the mounting cavity is high, the thermostat inside the mounting cavity is changed from a closed state to an open state, the cooling liquid in the mounting cavity flows out from the first large circulation channel and the second large circulation channel, compared with the prior art, the communication area between the large circulation channels and the mounting cavity is increased, the resistance of a cooling system and the flow rate of the large circulation are reduced, and the flow field of the large circulation is improved.

Example one

Fig. 1 is a schematic structural diagram of a thermostat assembly provided in this embodiment; FIG. 2 is a schematic structural diagram of another thermostat assembly provided in this embodiment; fig. 3 is a schematic view of a partial structure of the thermostat provided in this embodiment. It is noted that the thermostat is in a closed condition in fig. 1 and in an open condition in fig. 2, and the direction of the arrows in fig. 1-2 indicate the direction of flow of the coolant into the thermostat housing.

As shown in fig. 1-2, in one aspect, the present embodiment provides a thermostat housing 100. the thermostat housing 100 includes a mounting cavity 110, a large circulation passage 120 and a small circulation passage 130. The installation cavity 110 is provided with an open end, for example, the open end of the installation cavity 110 is the left end of the installation cavity 110, and it is worth mentioning that the open end of the installation cavity 110 is used for installing the thermostat 200, that is, the thermostat 200 extends into the installation cavity 110 from right to left in the assembling process and is fixed with the open end of the installation cavity 110, it is easy to understand that the open end of the installation cavity 110 can be used as a liquid inlet of the thermostat housing 100, that is, the cooling liquid enters the installation cavity 110 from right to left.

Fig. 1-2 show that the large circulation passage 120 includes a first large circulation passage 121, a second large circulation passage 122, and a large circulation outlet 123. The first end of the first large circulation channel 121 and the first end of the second large circulation channel 122 are both connected with the mounting cavity 110, for example, the first end of the first large circulation channel 121 is connected with the side wall of the mounting cavity 110, and the first end of the second large circulation channel 122 is communicated with the left side of the mounting cavity 110. One possible implementation is that the large circulation channel 120 is approximately in a "Y-shaped structure", the top end of the "Y-shaped structure" is communicated with the installation cavity 110, and the bottom end of the "Y-shaped structure" is the large circulation outlet 123. It should be noted that when the thermostat 200 is in the closed state, the thermostat 200 seals off the first end of the first large circulation passage 121 from the first end of the second large circulation passage 122. Those skilled in the art can set the cross-sectional sizes of the first large circulation channel 121 and the second large circulation channel 122 according to actual needs, and the embodiment is not limited herein.

Fig. 1-2 show that the cover plate 210 of the thermostat 200 is located at the first end of the second major circulation passage 122, and the cover plate 210 of the thermostat 200 can reciprocate in the axial direction of the mounting chamber 110, i.e., the left-right direction in fig. 1-2, and when the cover plate 210 is located at the rightmost end, the thermostat 200 is in the closed state, the cover plate 210 of the thermostat 200 blocks the first end of the second major circulation passage 122, and when the cover plate 210 moves from right to left, the thermostat 200 is in the open state. It should be noted that the length of the first end of the second large circulation passage 122 in the left-right direction is greater than the length of the cover plate 210 of the thermostat 200 that protrudes when the thermostat 200 is in the open state.

It can be understood by those skilled in the art that the length of the first end of the second large circulation passage 122 in the left-right direction is greater than the length of the cover plate 210 of the thermostat 200 that extends when the thermostat 200 is in the open state, so that it is ensured that the second large circulation passage 122 does not obstruct the thermostat 200 from opening, thereby ensuring that the small circulation passage 130 can be completely blocked when the thermostat 200 is in the open state.

With continued reference to fig. 1-2, a first end of the small circulation passage 130 is connected to the mounting cavity 110, and a second end of the small circulation passage 130 is in communication with a small circulation outlet 131, illustratively, the small circulation outlet 131 and the large circulation outlet 123 are located on opposite sides of the thermostat housing 100, respectively. The cross-sectional area of the small circulation channel 130 is not limited in this embodiment, and can be set by those skilled in the art according to actual needs. It is easily understood that when the thermostat 200 is in a closed state, the small circulation passage 130 is in communication with the installation cavity 110; when the thermostat 200 is in an open state, the thermostat 200 blocks the first end of the small circulation passage 130.

One possible implementation is that the first end of the small circulation passage 130 is located between the first end of the first large circulation passage 121 and the first end of the second large circulation passage 122 in the left-right direction. Specifically, the first end of the first large circulation channel 121 is located at the right side of the first end of the small circulation channel 130, and the first end of the second large circulation channel 122 is located at the left side of the first end of the small circulation channel 130.

As will be understood by those skilled in the art, by disposing the first end of the small circulation passage 130 between the first end of the first large circulation passage 121 and the first end of the second large circulation passage 122, when the valve of the thermostat 200 moves inside the installation cavity 110, it is possible to block the first end of the small circulation passage 130 or block the first end of the first large circulation passage 121 and the first end of the second large circulation passage 122, for example, when the valve of the thermostat 200 is located at the first position, the valve of the thermostat 200 blocks the first end of the first large circulation passage 121 and the first end of the second large circulation passage 122; the valve of the thermostat 200 blocks the small circulation passage 130 when the valve of the thermostat 200 moves from the first position to the second position.

In a possible implementation, the inner wall of the mounting chamber 110 is provided with a sealing ring 140, and specifically, the sealing ring 140 is located between the first end of the first large circulation passage 121 and the first end of the small circulation passage 130. The sealing ring 140 is fixedly connected to the inner wall of the mounting cavity 110, and illustratively, the inner wall of the mounting cavity 110 is provided with a mounting groove, and the sealing ring 140 is embedded in the mounting groove. The structure of the sealing ring 140 is not limited in this embodiment, and those skilled in the art can set the structure according to actual needs.

It can be understood by those skilled in the art that the sealing ring 140 can improve the sealing effect between the mounting cavity 110 and the thermostat 200, thereby preventing the large circulation passage 120 and the small circulation passage 130 from communicating with each other and causing leakage of the cooling fluid.

In the thermostat housing 100 provided in this embodiment, when the temperature of the coolant entering the mounting cavity 110 is high, as shown in fig. 2, the thermostat 200 is in an open state, the coolant in the mounting cavity 110 flows out from the first large circulation channel 121 and the second large circulation channel 122, which increases the communication area between the large circulation channel 120 and the mounting cavity 110, further increases the flow rate and the pressure drop at the communication position between the large circulation channel 120 and the mounting cavity 110, improves the flow field of the large circulation, and can reduce the resistance of the cooling system.

In another aspect of the present embodiment, a thermostat assembly is further provided, which includes a thermostat 200 and the thermostat housing 100 described above, wherein the thermostat 200 includes a cover plate 210 and a cylinder valve 220, and the cylinder valve 220 and the cover plate 210 are located inside the mounting cavity 110. Fig. 1-2 illustrate that the cover plate 210 is located at the left end of the barrel valve 220 and is fixedly connected with the barrel valve 220, for example, the cover plate 210 and the barrel valve 220 may be fixedly connected by a connecting rod 211, the left end of the connecting rod 211 is fixedly connected with the right end surface of the cover plate 210, and the right end of the connecting rod 211 is fixedly connected with the left end surface of the barrel valve 220, and preferably, the cover plate 210 and the connecting rod 211 may be made as a single piece by those skilled in the art to improve the structural strength of the cover plate 210.

It will be readily appreciated that the cross-sectional shape and cross-sectional size of the barrel valve 220 is matched to the cross-sectional shape and size of the mounting chamber 110 to prevent leakage of the cooling fluid after it enters the mounting chamber 110. It is worth mentioning that the length of the barrel valve 220 in the direction of the self axis is smaller than the length of the first large circulation passage 121 in the left-right direction plus the length of the small circulation passage 130 in the left-right direction to ensure that the barrel valve 220 can move in the direction of the self axis inside the mounting chamber 110.

As shown in fig. 1-2, the thermostat 200 provided in the present embodiment further includes a support plate 230, wherein the support plate 230 is fixedly connected to the inner wall of the mounting cavity 110, and specifically, the support plate 230 is located between the first end of the second large circulation channel 122 and the first end of the small circulation channel 130. Illustratively, the middle of the fulcrum plate 230 is bent to the left in fig. 1 to ensure that when the thermostat 200 is in the closed state, the right end face of the cover plate 210 abuts against the middle of the fulcrum plate 230, and the edge of the fulcrum plate 230 can be clamped with the inner wall of the mounting cavity 110. The fulcrum plate 230 is provided with a first through hole 231 at a radially central position, and fig. 1-2 show that the middle portion of the connecting rod 211 is located inside the first through hole 231 and the connecting rod 211 can reciprocate inside the first through hole 231 in the direction of its axis. The edge of the first through hole 231 is provided with water outlets, it is easy to understand that the number of the water outlets and the size of the water outlets are not limited, and those skilled in the art can set the water outlets according to actual needs. It is worth mentioning that when the thermostat 200 is in a closed state, the cover plate 210 is covered on the support plate 230 to block the water outlet on the cover plate 210, so that the coolant entering the interior of the mounting cavity 110 cannot flow out of the second large circulation passage 122 when the thermostat 200 is closed.

As can be understood by those skilled in the art, the thermostat 200 controls the communication state of the second large circulation passage 122 and the mounting cavity 110 through the cover plate 210 and the fulcrum plate 230, that is, when the cover plate 210 covers the fulcrum plate 230, the thermostat 200 blocks the first end of the second large circulation passage 122; when the cover plate 210 is separated from the support plate 230, the cooling liquid entering the interior of the mounting chamber 110 can flow into the second large circulation passage 122 from the water outlet on the support plate 230.

One possible implementation is that the connecting rod 211 is provided with a stopper portion 212, and the stopper portion 212 is located on the side of the fulcrum plate 230 facing the barrel valve 220, for example, the stopper portion 212 is located at a position of the connecting rod 211 near the right end. Illustratively, the limiting portion 212 is a sheet structure, and the sheet structure is perpendicular to the axis of the connecting rod 211, and it should be noted that the area of the limiting portion 212 is larger than the area of the first through hole 231. The connection rod 211 is limited by the limiting part 212, so that the connection rod 211 is prevented from being separated from the first through hole 231.

Further, a conical spring 240 is arranged between the limiting portion 212 and the support plate 230, the conical spring 240 is sleeved on the connecting rod 211, a small-diameter end of the conical spring 240 abuts against the limiting portion 212, and a large-diameter end of the conical spring 240 abuts against the support plate 230. It can be understood by those skilled in the art that by providing the conical spring 240 between the position-limiting portion 212 and the support plate 230, when the temperature of the cooling liquid in the installation cavity 110 is low, the cover plate 210 can be tightly attached to the support plate 230 by the elastic force of the conical spring 240, and the cooling liquid in the installation cavity 110 is prevented from flowing out of the second large circulation passage 122.

As shown in fig. 1-2, the left end of the barrel valve 220 is fixedly connected to the connecting rod 211, and illustratively, the left end of the barrel valve 220 is provided with a plurality of support beams extending toward the center in the radial direction of the barrel valve 220, the support beams intersect at the center of the left end of the barrel valve 220, and the right end of the connecting rod 211 may be connected to the intersection of the support beams. A sleeve 221 is connected to the left inner side surface of the barrel valve 220, and preferably, the axis of the sleeve 221 is aligned with the axis of the barrel valve 220. Fig. 1-2 show that the sleeve 221 is used to connect the push rod 270, illustratively, the left end of the push rod 270 is located inside the sleeve 221 and the left end of the push rod 270 is movable within the sleeve 221 along the axis of the sleeve 221. The middle of the push rod 270 is provided with a spring seat 281, the outer side of the sleeve 221 is sleeved with a first spring 222, the first spring 222 is sleeved on the sleeve 221, the left end of the first spring 222 abuts against the left end of the cylindrical valve 220, and the right end of the first spring 222 abuts against the spring seat 281.

It will be appreciated by those skilled in the art that the barrel valve 220 and the push rod 270 are connected by the sleeve 221 and the first spring 222, which protects the thermostat 200, i.e., when the barrel valve 220 abuts the fulcrum 230, the first spring 222 is compressed as the push rod 270 continues to move leftward, so as to prevent the barrel valve 220 from impacting the fulcrum 230 and causing damage to the thermostat 200.

As shown in fig. 1-2, the right end of the push rod 270 is connected to the thermal bulb 260, specifically, a temperature sensing medium is disposed in the thermal bulb 260, the volume of the temperature sensing medium can change with the temperature change, and the first end of the push rod 270 penetrates through the thermal bulb 260 and extends into the temperature sensing medium. When the temperature near the temperature sensing bulb 260 is reduced, the solidification volume of the temperature sensing medium is reduced; when the temperature near the bulb 260 increases, the liquefied volume of the temperature sensing medium increases. The present embodiment is not limited to a specific material of the temperature sensing medium, and for example, a material that can change with a change in temperature, such as paraffin or ether, may be used as the temperature sensing medium. It is easily understood that, when the volume of the temperature sensing medium increases, the temperature sensing medium presses the right end of the push rod 270 to move the push rod 270 leftward.

Fig. 1-2 show that thermostat 200 is fixedly connected to the open end of mounting chamber 110 via valve seat 250. illustratively, valve seat 250 and the open end of mounting chamber 110 may be fastened by fasteners or may be secured by snap-fitting valve seat 250 to the open end of mounting chamber 110. Illustratively, the valve seat 250 is provided with a plurality of water inlets, that is, the cooling fluid may enter the inside of the installation cavity 110 from the water inlets of the valve seat 250.

In a possible implementation manner, the valve seat 250 is provided with a second through hole along the central position in the radial direction of the valve seat, and correspondingly, the temperature sensing bulb 260 is provided with a step surface 261, and the step surface 261 abuts against the edge of the second through hole. Furthermore, the second through hole and the step surface 261 of the thermal bulb 260 can be used for limiting the thermal bulb 260, so that the thermal bulb 260 is prevented from moving rightwards and being separated from the valve seat 250.

It will be appreciated by those skilled in the art that the cooling fluid enters the mounting chamber 110 from the open end of the mounting chamber 110, and in particular, the cooling fluid enters the interior of the mounting chamber 110 from the inlet of the valve seat 250. In the process, the temperature sensing bulb 260 can sense the temperature of the cooling liquid, the volume of the temperature sensing medium in the temperature sensing bulb 260 changes along with the temperature change of the cooling liquid, when the volume of the temperature sensing medium increases, the temperature sensing medium extrudes the right end of the push rod 270 to enable the push rod 270 to move leftwards, and the push rod 270 drives the barrel valve 220 to move leftwards synchronously in the leftward movement process, so that the thermostat 200 is opened.

As shown in fig. 3, in a possible implementation manner, the second spring 290 is sleeved on the thermal bulb 260, the middle portion of the push rod 270 is fixedly connected to the support 280, for example, the support 280 includes a spring seat 281 and two connecting arms 282, the number of the connecting arms 282 is two, the two connecting arms 282 are arranged oppositely, the first ends of the two connecting arms 282 are fixedly connected to the spring seat 281, the middle portions of the two connecting arms 282 are located in the water inlet of the valve seat 250, the second ends of the two connecting arms 282 are bent towards one opposite side to form a bent portion, the left end of the second spring 290 abuts against the valve seat 250, and the right end of the second spring 290 abuts against the bent portion. With the above arrangement, when the temperature of the coolant drops, the push rod 270 can be restored by the elastic force of the second spring 290.

In the present embodiment, the cartridge valve 220 is movable from the first position to the second position in the axial direction of the mounting chamber 110, and from the second position to the first position in the axial direction of the mounting chamber 110. It will be readily appreciated that as the cartridge valve 220 moves, the cover plate 210 moves in synchronization with the cartridge valve 220. When the cylinder valve 220 is located at the first position, the small circulation passage 130 is communicated with the mounting chamber 110, the first end of the first large circulation passage 121 is blocked by the side wall of the cylinder valve 220, and the first end of the second large circulation passage 122 is blocked by the cover plate 210; when the cylindrical valve 220 is located at the second position, the first large circulation channel 121 and the second large circulation channel 122 are both communicated with the installation cavity 110, the side wall of the cylindrical valve 220 seals the first end of the small circulation channel 130, at this time, the cooling liquid can flow out from the first large circulation channel 121 and the second large circulation channel 122, the communication area between the large circulation channel 120 and the installation cavity 110 is increased, the flow rate and the pressure drop at the communication position between the large circulation channel 120 and the installation cavity 110 are increased, the flow rate of the large circulation is reduced, the flow field of the large circulation is improved, and meanwhile, the resistance of the cooling system can be reduced. It will be readily appreciated that with the barrel valve 220 in the first position, the thermostat 200 is in a closed state; with the barrel valve 220 in the second position, the thermostat 200 is in an open state.

Example two

On the basis of the first embodiment, the present embodiment further provides an engine cooling system, which includes an engine body and the thermostat assembly in the first embodiment. The cooling water path inside the engine body is communicated with the thermostat assembly, and the temperature sensing bulb of the thermostat assembly senses the temperature of the cooling liquid inside the cooling water path so as to control the cooling liquid inside the cooling water path to flow out of the large circulation outlet or the small circulation outlet. The cooling liquid flows out from a large circulation outlet of the thermostat assembly, enters a large circulation flow channel, is cooled by the large circulation flow channel and flows back to the interior of the engine body; the cooling liquid flows out from a small circulation outlet of the thermostat assembly, then enters a small circulation flow channel, and directly flows back to the interior of the engine body through the small circulation flow channel.

The thermostat assembly in this embodiment has the same structure as the thermostat assembly provided in the first embodiment, and can bring about the same or similar technical effects, and details are not repeated herein, and specific reference may be made to the description of the above embodiments.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A thermostat housing, comprising:

the installation cavity is provided with an opening end and is used for installing a thermostat;

the large circulation channel comprises a first large circulation channel, a second large circulation channel and a large circulation outlet, the first end of the first large circulation channel and the first end of the second large circulation channel are both connected with the installation cavity, and the second end of the first large circulation channel and the second end of the second large circulation channel are communicated with the large circulation outlet;

the first end of the small circulation channel is connected with the installation cavity, and the second end of the small circulation channel is communicated with the small circulation outlet;

when the thermostat is in a closed state, the small circulation channel is communicated with the installation cavity, and the first end of the first large circulation channel and the first end of the second large circulation channel are both interrupted with the installation cavity; when the thermostat is in an open state, the first end of the first large circulation channel and the first end of the second large circulation channel are both communicated with the installation cavity, and the small circulation channel is interrupted from the installation cavity.

2. The thermostat housing according to claim 1, wherein the first end of the small circulation passage is located between the first end of the first large circulation passage and the first end of the second large circulation passage in a first direction, wherein the first direction is an axial direction of the mounting cavity.

3. The thermostat housing of claim 2 wherein the thermostat cover is located at a first end of the second main circulation passage, the first end of the second main circulation passage having a length in the first direction that is greater than a length of the thermostat cover that extends when the thermostat is in the open state.

4. The thermostat housing of claim 3, further comprising a sealing ring fixedly connected to an inner wall of the mounting cavity, the sealing ring being located between the first end of the first large circulation passage and the first end of the small circulation passage.

5. A thermostat assembly comprising a thermostat and a thermostat housing according to any one of claims 1-4;

the thermostat comprises a cylindrical valve and a cover plate, the cylindrical valve and the cover plate are positioned in the installation cavity, and the cover plate is positioned at the first end of the cylindrical valve and is fixedly connected with the cylindrical valve;

the cartridge valve is movable in a first direction from a first position, in which the small circulation passage communicates with the mount chamber, to a second position, in which the first and second large circulation passages both communicate with the mount chamber, and in a direction opposite to the first direction from the second position to the first position.

6. The thermostat assembly according to claim 5, further comprising a support plate fixedly connected to the inner wall of the mounting chamber, the support plate being located between the first end of the second large circulation passage and the first end of the small circulation passage, the support plate being provided with a first through hole at a radial center position thereof, and a water outlet being provided at an edge of the first through hole; when the cylindrical valve is located at the first position, the cover plate covers the support plate to seal the water outlet;

the cover plate faces the side face of one side of the cylindrical valve, a connecting rod is arranged, the first end of the connecting rod is fixedly connected with the cover plate, and the second end of the connecting rod penetrates through the first through hole and then is fixedly connected with the end portion of the cylindrical valve.

7. The thermostat assembly of claim 6, wherein the connecting rod is provided with a limiting portion located on a side of the fulcrum plate facing the barrel valve, a conical spring is provided between the limiting portion and the fulcrum plate, the conical spring is sleeved on the connecting rod, a small diameter end of the conical spring abuts against the limiting portion, and a large diameter end of the conical spring abuts against the fulcrum plate.

8. The thermostat assembly according to claim 7, further comprising a valve seat, a temperature sensing bulb and a push rod, wherein the valve seat is fixedly connected with the opening end of the mounting cavity, and a second through hole is formed in the valve seat along a central position in a radial direction of the valve seat;

the temperature sensing bulb is provided with a step surface, and the step surface is abutted against the edge of the second through hole; the temperature sensing device is characterized in that a temperature sensing medium is arranged in the temperature sensing bag, the volume of the temperature sensing medium can change along with the temperature change, and the first end of the push rod penetrates through the temperature sensing bag and extends into the temperature sensing medium.

9. The thermostat assembly according to claim 8, wherein a spring seat is disposed in a middle portion of the push rod, a sleeve is disposed at a side of an end portion of the barrel valve facing the thermal bulb, a second end of the push rod is located inside the sleeve, a spring is sleeved outside the sleeve, a first end of the spring abuts against the end portion of the barrel valve, and a second end of the spring abuts against the spring seat.

10. An engine cooling system comprising an engine block and the thermostat assembly of any one of claims 5-9;

the cooling water path in the engine body is communicated with the thermostat assembly, and the temperature sensing bulb of the thermostat assembly senses the temperature of the cooling liquid in the cooling water path so as to control the cooling liquid in the cooling water path to flow out of the large circulation outlet or the small circulation outlet.

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