A thermostatic valve includes a housing internally provided with a receiving cavity and a thermostatic actuating element mounted in the receiving cavity. The receiving cavity is in communication with the exterior through at least three ports such as a first connecting port, a second connecting port,
A thermostatic valve includes a housing internally provided with a receiving cavity and a thermostatic actuating element mounted in the receiving cavity. The receiving cavity is in communication with the exterior through at least three ports such as a first connecting port, a second connecting port, and a third connecting port. The thermostatic actuating element is mounted in the housing via two elastic members. An annular sealing collar which is fixedly mounted is provided in the receiving cavity. At least most of the thermostatic actuating element is located between the third port and the sealing collar. Such arrangement may ensure the temperature of the transmission oil when having a low temperature can rise rapidly and ensure the lubrication performance of a transmission. In addition, a processing precision requirement for components and parts can be reduced and manufacturing and mounting are more convenient.
대표청구항▼
1. A thermostatic valve, comprising a housing in which a receiving cavity is provided, and a thermostatic actuating element mounted in the receiving cavity, wherein the receiving cavity is in communication with an outside of the housing through at least three connecting ports comprising a first conn
1. A thermostatic valve, comprising a housing in which a receiving cavity is provided, and a thermostatic actuating element mounted in the receiving cavity, wherein the receiving cavity is in communication with an outside of the housing through at least three connecting ports comprising a first connecting port, a second connecting port and a third connecting port; the thermostatic actuating element comprises a main body of the thermostatic actuating element in which a thermosensitive substance is provided, and the thermostatic actuating element is mounted in the receiving cavity of the housing via two elastic members; and an annular sealing collar which is fixedly mounted is provided in the receiving cavity, and the first connecting port and the second connecting port are located at two sides of the annular sealing collar, respectively; a first passage is opened in a case that the second connecting port, an inner hole of the annular sealing collar and the first connecting port are in communication with each other, and a second passage is opened in a case that the first connecting port and the third connecting port are in communication with each other;in a case that a fluid has a first temperature, the thermosensitive substance in the thermostatic actuating element contracts, the main body of the thermostatic actuating element is moved towards the annular sealing collar under an action of an elastic force of the two elastic members, which enables a second engaging portion of the main body of the thermostatic actuating element, to abut against the annular sealing collar or cover the inner hole of the annular sealing collar, to block the first passage and open the second passage, wherein the second engaging portion maybe fixedly provided on the main body of the thermostatic element; andin a case that the fluid has a second temperature, the thermosensitive substance in the thermostatic actuating element expands, the main body of the thermostatic actuating elements moves towards the third connecting port, until a first engaging portion of the main body of the thermostatic actuating element abuts against an end surface of a part of the housing where the third connecting port is located or covers the third connecting port, to block the second passage and open the first passage, wherein the first engaging portion maybe fixedly provided on the main body of the thermostatic element;wherein a first valve opening is provided in the housing at a position where the third connecting port is provided; andthe housing has an open end which is in communication with the receiving cavity, the open end of the housing is sealed by a cap which is fixedly and hermetically mounted; the thermostatic actuating element further comprises a piston which is slidably mounted at a first end of the main body of the thermostatic actuating element, and one end of the piston is located outside the main body of the thermostatic actuating element and passes through an annular hole of the annular sealing collar; andthe two elastic members comprise a first elastic member and a second elastic member; the first elastic member is arranged at the cap or at a side adjacent to the cap, and the first elastic member has one end abutting against the cap, and another end abutting against or indirectly abutting against the piston at least during movement of the thermostatic actuating element; the second elastic member is arranged at the third connecting port or a side adjacent to the third connecting port, and the second elastic member has one end abutting against an inner wall or a bottom wall of the receiving cavity of the housing, and another end abutting against the main body; an initial deformation force of the first elastic member is greater than or equal to a pressure applied to the second elastic member when the first engaging portion abuts against a part where the first valve opening is located. 2. The thermostatic valve according to claim 1, wherein the first valve opening is a port communicating the third connecting port with a second cavity where the main body of the thermostatic actuating element is provided; in a case that the first valve opening is closed, the second passage is blocked and the first passage is opened; a second valve opening is provided on the annular sealing collar to communicate the first connecting port with the second connecting port, and the second valve opening is a port of the annular sealing collar that faces the third connecting port or a port of the inner hole of the annular sealing collar; and in a case that the second valve opening is closed, the second passage is opened and the first passage is blocked. 3. The thermostatic valve according to claim 2, wherein the thermosensitive substance expands when the thermostatic actuating element is heated, and after the piston abuts against or indirectly abuts against the first elastic member, the main body is moved with respect to the piston, such that moves towards the third connecting port, until the first engaging portion abuts against the part where the first valve opening is located, and then the piston compresses the first elastic member and moves towards the cap. 4. The thermostatic valve according to claim 1, wherein a third passage in communication with the third connecting port is provided in the housing, a shoulder portion is formed at a junction of the third connecting port and the third passage, and the second elastic member abuts against the shoulder portion formed at the junction between the third connecting port and the third passage; in a case that the fluid has the second temperature, the thermosensitive substance in the thermostatic actuating element expands, the main body of the thermostatic actuating element moves towards the third connecting port against the elastic force of the second elastic member, until the first engaging portion is in pressingly contact with the part where the first valve opening is located to block the third connecting port; and a distance from a bottom of the third passage to a bottom of the third connecting port is L, and a diameter of the passage is R, wherein 1>L/R≥ 1/16. 5. The thermostatic valve according to claim 3, wherein a retaining member is provided at a circumferential side of the main body of the thermostatic actuating element, an outer diameter of the retaining member is greater than an inner diameter of the third connecting port; one end, which is between the retaining member and the third connecting port, of the main body has an outer diameter smaller than the inner diameter of the third connecting port, the second elastic member has one end in pressingly contact with the retaining member, and the other end in pressingly contact with the inner wall or the bottom wall of the receiving cavity of the housing, and the retaining member is fixedly mounted or integrally formed with the main body of the thermostatic actuating element; in a case that the thermostatic actuating element is heated, the main body moves downwards to drive the retaining member to move, until the first engaging portion, facing the third connecting port, of the retaining member abuts against the part where the first valve opening is located, to block the third connecting port; and then a force generated by the expansion of the thermosensitive substance of the thermostatic actuating element when being heated is enough to continue compressing the first elastic member. 6. The thermostatic valve according to claim 3, wherein a mounting portion is provided at the second end of the main body of the thermostatic actuating element, a diameter of an outer side wall of the main body of the thermostatic actuating element is greater than an inner diameter of the third connecting port, and one end of the second elastic member is fixed by the mounting portion; a third passage is provided in the housing to communicate the third connecting port with a corresponding external port; a flat surface portion is provided between the outer side wall of the main body and the mounting portion and functions as the first engaging portion for cooperating with the first valve opening, the mounting portion is configured to radially limit the second elastic member, a flat contacting part of the first engaging portion on the main body is configured to axially limit the second elastic member; an outer diameter of each of the second elastic member and the mounting portion is smaller than the inner diameter of the third connecting port, the other end of the second elastic member extends into the third connecting port of the housing and is in pressingly contact with the inner wall or the bottom wall of the housing; and when the first engaging portion of the main body abuts against the part where the valve opening is located, the main body blocks the third connecting port to separate the external port in communication with the third connecting port from the first connecting port. 7. The thermostatic valve according to claim 3, wherein a passage is provided in the housing to communicate the third connecting port with a corresponding external port; the main body of the thermostatic actuating element is of a stepped cylindrical shape, and a first end of the main body has an outer diameter greater than an outer diameter of a second end of the main body, to form a stepped shoulder; the one end of the second elastic member is pressingly connected to the stepped shoulder portion on the circumferential side of the main body of the thermostatic actuating element, the other end of the second elastic member is in pressingly contact with an inner wall of the housing at a position where the valve opening is located; a second elastic member having an inner diameter smaller than the outer diameter of the first end of the main body of the thermostatic actuating element is sleeved on the second end of the main body of the thermostatic actuating element, and a diameter of the outer side wall of the second end of the main body of the thermostatic actuating element is greater than the inner diameter of the third connecting port; a circumferential side of an end portion of the second end of the main body is chamfered or the end portion of the second end of the main body is frustum-shaped; the end portion, facing the third connecting port, of the second end of the main body functions as the first engaging portion for cooperating with the first valve opening; in a case that the thermostatic actuating element is heated, when the engaging portion of the main body abuts against the part where the valve opening is located, the main body blocks the third connecting port to separate the external port in communication with the third connecting port through the passage from the first connecting port. 8. The thermostatic valve according to claim 3, wherein the cap is provided with an open end functioning as a receiving portion, and the open end faces the receiving cavity of the housing; and the thermostatic valve further comprises a spring seat, and a retaining member which is axially positioned, wherein the retaining member is fixed to the cap or integrally formed with the cap; and a first elastic member of the two elastic members is arranged in the receiving portion of the cap, which has one end abutting against a bottom wall of the receiving portion of the cap, and another end abutting against the spring seat; and the first elastic member, the spring seat and the retaining member are arranged in the receiving portion of the cap in sequence, and the spring seat is fixed in the receiving portion of the cap via the retaining member. 9. The thermostatic valve according to claim 8, wherein a surface of the spring seat away from the receiving portion is in pressingly contact with the retaining member or the piston; and when the piston is moving, the piston is in contact with the first elastic member via the spring seat. 10. The thermostatic valve according to claim 9, wherein the cap is provided with a groove at the receiving portion, the retaining member is retained in the recess to be axially positioned; the cap is fixed to the housing by a snap ring, the snap ring is provided at the open end of the housing, the cap is fixed at the open end of the housing by the snap ring, and a sealing member is provided between an outer side wall of the cap and the inner wall of the housing. 11. The thermostatic valve according to claim 1, wherein the cap is integrally formed with the annular sealing collar, the cap is fixedly connected to the annular sealing collar via a connecting portion, a fluid communicating hole is provided between the cap and the annular sealing collar, and the second connecting port, the fluid communicating hole, the inner hole of the annular sealing collar and the first connecting port are in communication with each other to form the first passage; and an outer diameter portion of the annular sealing collar is 0.05 to 0.30 mm smaller than an inner wall of a portion, corresponding to the annular sealing collar, on the receiving cavity of the housing. 12. The thermostatic valve according to claim 11, wherein the outer wall of the housing is provided with a connecting member for communicating the receiving cavity with an external device, and the connecting member is integrally formed with the housing; and the piston is integrally formed with the spring seat, or one end of the piston of the thermostatic actuating element is fixedly mounted on the spring seat. 13. The thermostatic valve according to claim 12, wherein the thermostatic valve is connected to the external device via a connector, an external port is provided on an outer side of the housing, and a through hole having a dimension matching with a dimension of the external port is provided on the connector at a position corresponding to the external port; and a contour shape of a mounting surface of the connector configured to connect the external device matches with a contour shape of a mounting surface of the external device. 14. The thermostatic valve according to claim 3, wherein a bypass passage is provided on the annular sealing collar, and in a case that the first passage is blocked, the bypass passage allows the fluid to flow at a first flow quantity. 15. The thermostatic valve according to claim 14, wherein the bypass passage is a notch adjacent to the inner hole of the annular sealing collar or a through hole provided on the sealing collar, and a size of the hole ranges from 0.3 to 1.5 mm. 16. The thermostatic valve according to claim 4, wherein the cap is provided with an open end functioning as a receiving portion, and the open end faces the receiving cavity of the housing; and the thermostatic valve further comprises a spring seat, and a retaining member which is axially positioned, wherein the retaining member is fixed to the cap or integrally formed with the cap; and a first elastic member of the two elastic members is arranged in the receiving portion of the cap, which has one end abutting against a bottom wall of the receiving portion of the cap, and another end abutting against the spring seat; and the first elastic member, the spring seat and the retaining member are arranged in the receiving portion of the cap in sequence, and the spring seat is fixed in the receiving portion of the cap via the retaining member. 17. The thermostatic valve according to claim 5, wherein the cap is provided with an open end functioning as a receiving portion, and the open end faces the receiving cavity of the housing; and the thermostatic valve further comprises a spring seat, and a retaining member which is axially positioned, wherein the retaining member is fixed to the cap or integrally formed with the cap; and a first elastic member of the two elastic members is arranged in the receiving portion of the cap, which has one end abutting against a bottom wall of the receiving portion of the cap, and another end abutting against the spring seat; and the first elastic member, the spring seat and the retaining member are arranged in the receiving portion of the cap in sequence, and the spring seat is fixed in the receiving portion of the cap via the retaining member. 18. The thermostatic valve according to claim 1, wherein a bypass passage is provided on the annular sealing collar, and in a case that the first passage is blocked, the bypass passage allows the fluid to flow at a first flow quantity. 19. The thermostatic valve according to claim 18, wherein the cap is integrally formed with the annular sealing collar, the cap is fixedly connected to the annular sealing collar via a connecting portion, a fluid communicating hole is provided between the cap and the annular sealing collar, and the second connecting port, the fluid communicating hole, the inner hole of the annular sealing collar and the first connecting port are in communication with each other to form the first passage; and an outer diameter portion of the annular sealing collar is 0.05 to 0.30 mm smaller than an inner wall of a portion, corresponding to the annular sealing collar, on the receiving cavity of the housing. 20. The thermostatic valve according to claim 2, wherein a bypass passage is provided on the annular sealing collar, and in a case that the first passage is blocked, the bypass passage allows the fluid to flow at a first flow quantity.
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