Thermal expansion valve
By introducing a push-back structure into the thermal expansion valve, the rolling or rotating fit push-back structure transmits movement, the problem of difficulty and wear of the adjustment bolt is solved, and smoother adjustment and longer service life is achieved.
Patent Information
- Application Number
- CN202422297438.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In existing thermal expansion valves, the adjustment bolts are prone to rotation difficulties and wear during rotation adjustment, which affects the service life.
The anti-push structure is adopted, including the first transmission structure and the second transmission structure, through rolling or rotating cooperation, the direct contact between the adjustment bolts and the elastic adjustment assembly is reduced, and the motion transmission and wear burden are realized.
Reduces adjustment resistance, extends the service life of adjustment bolts and elastic adjustment components, and improves adjustment reliability.
Smart Images
Figure CN223120807U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel measurement, and more specifically, to a thermostatic expansion valve. Background Art
[0002] In the prior art, the thermostatic expansion valve usually adjusts the elasticity of the elastic adjustment component through an adjusting bolt to improve the applicability of the thermostatic expansion valve.
[0003] However, the adjusting bolt in the prior art usually directly contacts the elastic adjustment component. When the adjusting bolt is rotated to adjust the elasticity of the elastic adjustment component, the two surfaces in contact between the adjusting bolt and the elastic adjustment component are affected by planar rotational friction, resulting in easy wear between the contact surfaces of the adjusting bolt and the elastic adjustment component, affecting the service life, and at the same time, the rotation of the adjusting bolt is blocked greatly, and then the problem of difficult adjustment occurs. Summary of the Utility Model
[0004] The utility model provides a thermostatic expansion valve to solve the problems of difficult rotation during the rotation adjustment of the adjusting bolt in the prior art and easy damage of the adjusting bolt and the elastic adjustment component.
[0005] To solve the above problems, the utility model provides a thermostatic expansion valve, which includes a valve body, a power head device, an elastic adjustment component, an adjusting bolt and a thrust structure. The valve body has an adjustment cavity. The power head device is arranged at the opening of the adjustment cavity and an adjustment diaphragm is arranged inside. The elastic adjustment component has a first end and a second end that can move elastically relative to each other. The first end abuts against the adjustment diaphragm. The adjusting bolt is threadedly installed on the side of the valve body and is drivingly connected to the second end through the thrust structure to adjust the relative distance between the second end and the first end. The thrust structure has a third end and a fourth end that can rotate or roll relative to each other. The third end abuts against or is in rolling cooperation with the second end, and the fourth end abuts against or is in rolling cooperation with the end of the adjusting bolt.
[0006] Further, the thrust structure includes a first transmission structure and a second transmission structure. The first transmission structure and the second transmission structure are rotatably or rollably connected to each other. The two ends of the first transmission structure and the second transmission structure facing away from each other respectively form the third end and the fourth end.
[0007] Further, both the first transmission structure and the second transmission structure are rotating seats. The thrust structure further includes a transfer ball arranged between the two rotating seats. The transfer ball is in rolling cooperation with the first transmission structure and the second transmission structure respectively. The two ends of the two rotating seats facing away from each other respectively form the third end and the fourth end. The third end abuts against the second end, and the fourth end abuts against the end of the adjusting bolt.
[0008] Further, the second transmission structure is a rotating seat, and the first transmission structure is a ball structure disposed on one side of the rotating seat facing the second end. The ball structure is rotatably disposed and at least partially protrudes from the end of the rotating seat to form a third end that rolls in cooperation with the second end, and the end of the rotating seat facing away from the ball structure forms a fourth end that abuts against the end of the adjusting bolt.
[0009] Further, the first transmission structure is a rotating seat, and the second transmission structure is a ball structure disposed on one side of the end of the rotating seat facing the adjusting bolt. The ball structure is rotatably disposed and at least partially protrudes from the end of the rotating seat to form a fourth end that rolls in cooperation with the end of the adjusting bolt, and the end of the rotating seat facing away from the ball structure forms a third end that abuts against the second end.
[0010] Further, both the first transmission structure and the second transmission structure are ball structures. The pushing structure further includes an adapter seat. The two ball structures are respectively disposed at both ends of the adapter seat. Any one of the ball structures at least partially protrudes from the end of the adapter seat to form a third end and a fourth end that respectively roll in cooperation with the second end and the end of the adjusting bolt.
[0011] Further, the pushing structure is an annular cylindrical structure.
[0012] Further, the power head device further includes an upper membrane cover, a lower membrane cover, a coil pipe, a temperature sensing pipe, and a filling pipe. The lower membrane cover is fixedly disposed at the opening of the adjusting cavity of the valve body. The upper membrane cover is disposed on the lower membrane cover. The adjusting diaphragm is disposed between the upper membrane cover and the lower membrane cover. The temperature sensing pipe is spaced apart and disposed on one side of the valve body. One end of the coil pipe communicates with the cavity between the upper membrane cover and the adjusting diaphragm, and the other end of the coil pipe is disposed above the temperature sensing pipe. The filling pipe is disposed above the temperature sensing pipe.
[0013] Further, the elastic adjusting assembly includes a transmission plate, an elastic member, and a support seat. The adjusting cavity has a first sub-cavity extending along the axial direction of the valve body and a second sub-cavity whose extending direction is inclined relative to the axial direction of the valve body. The second sub-cavity communicates with the first sub-cavity and has an internal thread. The support seat is slidably disposed through the first sub-cavity. The transmission plate is disposed at the opening of the first sub-cavity. One side of the support seat facing away from the transmission plate has an adjusting head. The two sides of the adjusting head and the transmission plate facing away from each other respectively form a second end and a first end. The adjusting bolt is threadedly installed in the second sub-cavity. The elastic member is sleeved on the outer periphery of the support seat and abuts against the transmission plate and the adjusting head at both ends respectively.
[0014] Further, the valve body further has a valve cavity. The thermostatic expansion valve further includes a transmission rod and a valve core structure. The valve core structure is disposed in the valve cavity. The transmission rod passes through the support seat and is respectively connected to the transmission plate and the valve core structure at both ends.
[0015] Applying the technical solution of the present utility model, a thermostatic expansion valve is provided. The thermostatic expansion valve includes a valve body, a power head device, an elastic adjustment assembly, an adjustment bolt, and a thrust structure. The valve body has an adjustment cavity. The power head device is arranged at the opening of the adjustment cavity and an adjustment diaphragm is arranged inside. The elastic adjustment assembly has a first end and a second end that can move elastically relative to each other. The first end abuts against the adjustment diaphragm. The adjustment bolt is threadedly installed on the side of the valve body and is drivingly connected to the second end through the thrust structure to adjust the relative distance between the second end and the first end. The thrust structure has a third end and a fourth end that can rotate or roll relative to each other. The third end abuts against or rolls with the second end, and the fourth end abuts against or rolls with the end of the adjustment bolt.
[0016] Adopting this solution, the transfer of the adjustment bolt and the elastic adjustment assembly is realized through the thrust structure to transmit motion and bear the wear generated by the motion. And through the relative rotation or rolling of the third end and the fourth end, the abutment or rolling fit of the third end and the second end, and the abutment or rolling fit of the fourth end and the end of the adjustment bolt, when the adjustment bolt rotates, it will at least rotate or roll relative to the second end, which is beneficial to further eliminating the wear generated during the adjustment process and reducing the adjustment resistance. It avoids the situation that the end of the adjustment bolt in the prior art directly contacts the second end of the elastic adjustment assembly, which is prone to rotation obstruction and rotational wear, making the rotation of the adjustment bolt smoother. At the same time, the reliability and service life of the adjustment bolt and the elastic adjustment assembly are improved. Description of the Drawings
[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0018] Figure 1 The structural schematic diagram of the thermostatic expansion valve provided by Embodiment 1 of the present utility model is shown;
[0019] Figure 2 It shows Figure 1 The cross-sectional view of
[0020] Figure 3 It shows Figure 2 The enlarged view of the selected position A in
[0021] Figure 4 The application schematic diagram of the thrust structure of the thermostatic expansion valve provided by Embodiment 2 of the present utility model is shown;
[0022] Figure 5 It shows Figure 4 The top view perspective of the thrust structure on one side of the first transmission structure in
[0023] Figure 6Shows an application schematic diagram of the thrust structure of the thermostatic expansion valve provided by the third embodiment of the present utility model;
[0024] Figure 7 Shows an application schematic diagram of the thrust structure of the thermostatic expansion valve provided by the fourth embodiment of the present utility model.
[0025] Among them, the above-mentioned drawings include the following reference numerals:
[0026] 10, valve body; 101, adjustment cavity; 102, valve cavity;
[0027] 20, power head device; 21, upper diaphragm cover; 22, lower diaphragm cover; 23, coil; 24, temperature sensing tube; 25, filling tube; 26, adjustment diaphragm;
[0028] 30, elastic adjustment assembly; 31, transmission plate; 32, elastic member; 33, support seat; 34, transmission rod;
[0029] 40, adjustment bolt;
[0030] 50, thrust structure; 51, first transmission structure; 52, second transmission structure; 53, adapter seat; 54, adapter ball; 55, mounting cover. Detailed implementation manners
[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0032] As Figures 1 to 7 shown, an embodiment of the present utility model provides a thermostatic expansion valve. The thermostatic expansion valve includes a valve body 10, a power head device 20, an elastic adjustment assembly 30, an adjustment bolt 40, and a thrust structure 50. The valve body 10 has an adjustment cavity 101. The power head device 20 is arranged at the opening of the adjustment cavity 101 and an adjustment diaphragm 26 is arranged inside. The elastic adjustment assembly 30 has a first end and a second end that can move relative to each other elastically. The first end abuts against the adjustment diaphragm 26. The adjustment bolt 40 is threadedly installed on the side of the valve body 10 and is drivingly connected to the second end through the thrust structure 50 to adjust the relative distance between the second end and the first end; the thrust structure 50 has a third end and a fourth end that can rotate or roll relative to each other. The third end abuts or rolls with the second end, and the fourth end abuts or rolls with the end of the adjustment bolt 40.
[0033] In this embodiment, the push-pull structure 50 is used to realize the connection between the adjusting bolt 40 and the elastic adjusting component 30, transmit the motion and bear the wear caused by the motion, and through the relative rotation or rolling of the third end and the fourth end, the abutment or rolling cooperation between the third end and the second end, and the abutment or rolling cooperation between the fourth end and the end of the adjusting bolt 40, the adjusting bolt 40 will at least rotate or roll relative to the second end when rotating, which is beneficial to further eliminate the wear generated in the adjustment process and reduce the adjustment resistance, and avoids the situation in the prior art that the end of the adjusting bolt 40 directly contacts the second end of the elastic adjusting component 30, which is prone to rotation obstruction and rotation wear, so that the rotation of the adjusting bolt 40 is smoother, and at the same time, the reliability and service life of the adjusting bolt 40 and the elastic adjusting component 30 are improved.
[0034] Specifically, the push structure 50 includes a first transmission structure 51 and a second transmission structure 52, which are connected to each other in a relatively rotatable or rolling manner, and the two ends of the first transmission structure 51 and the second transmission structure 52 that are separated from each other form a third end and a fourth end, respectively. This arrangement facilitates the formation of the third end and the fourth end.
[0035] like Figures 1 to 3 As shown, in the thermal expansion valve provided in the first embodiment of the present utility model, the first transmission structure 51 and the second transmission structure 52 are both rotating seats, and the push structure 50 further includes a transfer ball 54 arranged between the two rotating seats, and the transfer ball 54 respectively rolls with the first transmission structure 51 and the second transmission structure 52, and the two ends of the two rotating seats that are separated from each other form a third end and a fourth end respectively, and the third end abuts with the second end, and the fourth end abuts with the end of the adjusting bolt 40. This arrangement facilitates the design of relative rotation or relative rolling between the first transmission structure 51 and the second transmission structure 52.
[0036] Specifically, the push structure 50 in this embodiment is an annular cylindrical structure (cylindrical structure), that is, the first transmission structure 51 and the second transmission structure 52 are both annular rotating seats, which is beneficial to reducing the weight of the push structure 50 while ensuring the transmission effect, and is also beneficial to the limiting cooperation between the push structure 50 and the inner wall of the cavity inside the valve body 10.
[0037] Preferably, the thrust structure 50 in this embodiment adopts a rolling bearing.
[0038] Among them, in this embodiment, two end faces of the first transmission structure 51 and the second transmission structure 52 facing away from each other respectively form a third end and a fourth end. Since the third end and the fourth end are pressed between the second end and the end of the adjusting bolt 40, when the adjusting bolt 40 rotates, the second transmission structure 52 will also rotate along with the adjusting bolt 40. And the second transmission structure 52 and the first transmission structure 51 can rotate relative to each other through the transfer ball 54. Therefore, the first transmission structure 51 will not rotate along with the rotation of the adjusting bolt 40, that is, only relative sliding but no relative rotation will occur between the third end of the first transmission structure 51 and the second end, and no rotational friction will be generated, eliminating the wear generated during the adjustment process and reducing the adjustment resistance.
[0039] Preferably, in order to avoid the situation of relative rotation and the resulting rotational resistance and rotational wear between the end of the adjusting bolt 40 and the fourth end, a linkage structure can be provided between the two to limit their relative rotation.
[0040] It should be noted that in this embodiment, the adjusting cavity 101 has a first sub-cavity extending along the axial direction of the valve body 10 and a second sub-cavity whose extending direction is inclined relative to the axial direction of the valve body 10. The second sub-cavity is communicated with the first sub-cavity and has internal threads. The elastic adjusting component 30 is elastically inserted into the first sub-cavity, and the adjusting bolt 40 is threadedly installed in the second sub-cavity. The pushing structure 50 in this embodiment is a cylindrical structure, and its outer periphery is in limit fit with the inner wall of the cavity on the side communicating with the first sub-cavity without internal threads on the inner wall of the second sub-cavity to realize the limit installation and sliding guidance of the pushing structure 50. And such a setting is also beneficial to reducing the weight of the pushing structure 50 on the basis of ensuring the transmission effect, which is beneficial to the light weight of the thermostatic expansion valve.
[0041] Such as Figure 1 and Figure 2As shown, the power head device 20 also includes an upper diaphragm cover 21, a lower diaphragm cover 22, a coil 23, a temperature sensing tube 24 and a filling tube 25. The lower diaphragm cover 22 is fixedly arranged at the opening of the first sub-cavity of the valve body 10, the upper diaphragm cover 21 is arranged on the lower diaphragm cover 22, the regulating diaphragm 26 is arranged between the upper diaphragm cover 21 and the lower diaphragm cover 22, the temperature sensing tube 24 is arranged at intervals on one side of the valve body 10, one end of the coil 23 is connected to the cavity between the upper diaphragm cover 21 and the regulating diaphragm 26, the other end of the coil 23 is arranged on the upper part of the temperature sensing tube 24, and the filling tube 25 is arranged on the upper part of the temperature sensing tube 24. Arranged on the upper part of the temperature sensing tube 24, the elastic adjustment assembly 30 includes a transmission plate 31, an elastic member 32 and a support seat 33. The support seat 33 is slidably arranged in the first sub-cavity. The transmission plate 31 is arranged at the opening of the first sub-cavity. The support seat 33 has an adjustment head on the side away from the transmission plate 31. The adjustment head and the transmission plate 31 form a second end and a first end on both sides away from each other. The adjustment bolt 40 is threadedly installed in the second sub-cavity. The elastic member 32 is sleeved on the outer periphery of the support seat 33 and the two ends are respectively abutted against the transmission plate 31 and the adjustment head. The valve body 10 also has a valve cavity 102. The thermal expansion valve also includes a transmission rod 34 and a valve core structure. The valve core structure is arranged in the valve cavity 102. The transmission rod 34 passes through the support seat 33 and the two ends are respectively connected to the transmission plate 31 and the valve core structure.
[0042] In this embodiment, the position of the support seat 33 in the first sub-chamber is adjusted by rotating the adjusting bolt 40, thereby adjusting the elastic force of the elastic member 32 so that the elastic force acting on the adjusting diaphragm 26 is greater. It is necessary to provide a greater pressure to the cavity between the upper diaphragm cover 21 and the adjusting diaphragm 26 through the power head device 20 to achieve the downward pressure on the adjusting diaphragm 26, which is beneficial to improve the temperature control range and applicable temperature of the thermal expansion valve and improve the applicability of the thermal expansion valve. It can be understood that after the position of the support seat 33 is stabilized, the coil 23 of the power head device 20 provides pressure to the cavity between the upper diaphragm cover 21 and the adjusting diaphragm 26 and presses down the adjusting diaphragm 26, thereby achieving the position adjustment of the transmission plate 31 and the transmission rod 34. By adjusting the position of the transmission rod 34, the valve core structure in the valve cavity 102 can be adjusted, thereby achieving the adjustment of the flow rate.
[0043] The first sub-cavity has a guide cylinder section, the elastic member 32 and the support seat 33 are both sleeved on the outer periphery of the guide cylinder section, and the transmission rod 34 passes through the guide cylinder section. The outer periphery of the support seat 33 facing the valve cavity 102 is a conical cylinder surface, and the conical cylinder surface forms the second end. This arrangement is convenient for cooperation with the end of the adjusting bolt 40 and can realize the conversion of the direction of the force, converting the oblique upward thrust into the vertical upward thrust, and ensuring the reliability and stability of the support seat 33 pushing up.
[0044] like Figure 4 and Figure 5As shown, embodiment 2 of the utility model provides a thermal expansion valve, which is different from embodiment 1 in that the first transmission structure 51 and the second transmission structure 52 are both ball structures, and the push structure 50 also includes an adapter seat 53. The two ball structures are respectively arranged at the two ends of the adapter seat 53, and any one of the ball structures at least partially protrudes from the end of the adapter seat 53 to form a third end and a fourth end that respectively roll with the second end and the end of the adjusting bolt 40.
[0045] In this embodiment, if Figure 4 As shown, the ball structures of the first transmission structure 51 and the second transmission structure 52 are both composed of multiple balls, and both sides of the adapter 53 have multiple installation grooves for installing multiple balls of the first transmission structure 51 and multiple balls of the second transmission structure 52. The multiple balls on either side are rotated and pressed into the multiple installation grooves on the same side of the adapter 53 through the installation cover 55. The ball structure at least partially protrudes from the installation cover 55 and forms a third end or a fourth end. Among them, for the first transmission structure 51, as Figure 5 As shown, it forms a support gap for supporting the second end and spacing the second end and the mounting cover 55 by at least two balls to ensure effective rolling contact with the second end (wherein, Figure 5 The dotted circle part in the figure is the maximum radial dimension of the ball in the adapter 53 and the mounting cover 55, and the solid circle part is the part of the ball protruding from the mounting cover 55. The arrangement of the ball structure of the second transmission structure 52 is similar). For the second transmission structure 52, the number of balls can be designed according to actual conditions. This arrangement is conducive to eliminating the wear generated during the adjustment process and reducing the adjustment resistance, making the rotation of the adjustment bolt 40 smoother, and improving the reliability and service life of the adjustment bolt 40 and the elastic adjustment component 30.
[0046] like Figure 6 As shown, the third embodiment of the utility model provides a thermal expansion valve, which is different from the first embodiment in that the first transmission structure 51 is a rotating seat, the second transmission structure 52 is a ball structure arranged on the side of the end of the rotating seat facing the adjusting bolt 40, the ball structure can be rolled and at least partially protrudes from the end of the rotating seat to form a fourth end that is rollingly matched with the end of the adjusting bolt 40, and the end of the rotating seat away from the ball structure forms a third end that abuts against the second end. In this embodiment, the end surface of the rotating seat away from the second transmission structure 52 forms the third end, and the ball structure of the second transmission structure 52 is composed of a plurality of balls. The end of the first transmission structure 51 (rotating seat) facing the adjusting bolt 40 has a plurality of mounting grooves for mounting a plurality of balls, and the plurality of balls are rotated and pressed into the plurality of mounting grooves of the rotating seat one by one through the mounting cover 55. Any ball at least partially protrudes from the mounting cover 55 and forms the fourth end. The number of balls can be designed according to actual conditions.
[0047] likeFigure 7 As shown in the figure, Embodiment 4 of the present utility model provides a thermostatic expansion valve. The difference from Embodiment 1 is that the second transmission structure 52 is a rotating seat, and the first transmission structure 51 is a ball structure arranged on one side of the rotating seat facing the second end. The ball structure is rotatably arranged and at least part of it protrudes from the end of the rotating seat to form a third end that rolls in cooperation with the second end. The end of the rotating seat facing away from the ball structure forms a fourth end that abuts against the end of the adjusting bolt 40. In this embodiment, the end face of the rotating seat facing away from the first transmission structure 51 forms the fourth end. The ball structure of the first transmission structure 51 is composed of a plurality of balls. The end of the second transmission structure 52 (rotating seat) facing the second end has a plurality of mounting grooves for mounting a plurality of balls. The plurality of balls are rotatably pressed into the plurality of mounting grooves of the rotating seat one by one through a mounting cover 55. Any one ball protrudes at least partially from the mounting cover 55 and forms the third end. Further, for the plurality of balls of the first transmission structure 51, their setting method and support principle are the same as Figure 5 the setting method and support principle (support clearance) shown in the figure.
[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0049] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0050] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.
[0051] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here should be made.
[0052] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.
[0053] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A thermostatic expansion valve, characterized in that, The thermostatic expansion valve includes a valve body (10), a power head device (20), an elastic adjustment assembly (30), an adjustment bolt (40), and a thrust structure (50). The valve body (10) has an adjustment cavity (101). The power head device (20) is arranged at the opening of the adjustment cavity (101) and an adjustment diaphragm (26) is arranged inside. The elastic adjustment assembly (30) has a first end and a second end that can move relative to each other elastically. The first end abuts against the adjustment diaphragm (26). The adjustment bolt (40) is threadedly installed on the side of the valve body (10) and is drivingly connected to the second end through the thrust structure (50) to adjust the relative distance between the second end and the first end. The thrust structure (50) has a third end and a fourth end that can rotate or roll relative to each other. The third end abuts against or is in rolling cooperation with the second end, and the fourth end abuts against or is in rolling cooperation with the end of the adjustment bolt (40).
2. The thermostatic expansion valve according to claim 1, wherein The thrust structure (50) includes a first transmission structure (51) and a second transmission structure (52). The first transmission structure (51) and the second transmission structure (52) are connected so as to be able to rotate or roll relative to each other. The two ends of the first transmission structure (51) and the second transmission structure (52) that face away from each other respectively form the third end and the fourth end.
3. The thermostatic expansion valve according to claim 2, wherein, Both the first transmission structure (51) and the second transmission structure (52) are rotating seats. The thrust structure (50) further includes a transfer ball (54) arranged between the two rotating seats. The transfer ball (54) is in rolling cooperation with the first transmission structure (51) and the second transmission structure (52) respectively. The two ends of the two rotating seats that face away from each other respectively form the third end and the fourth end. The third end abuts against the second end, and the fourth end abuts against the end of the adjustment bolt (40).
4. The thermostatic expansion valve according to claim 2, wherein, The second transmission structure (52) is a rotating seat. The first transmission structure (51) is a ball structure arranged on the side of the rotating seat facing the second end. The ball structure is arranged to be able to roll and at least partially protrudes from the end of the rotating seat to form the third end that is in rolling cooperation with the second end. The end of the rotating seat facing away from the ball structure forms the fourth end that abuts against the end of the adjustment bolt (40).
5. The thermostatic expansion valve according to claim 2, wherein, The first transmission structure (51) is a rotating seat. The second transmission structure (52) is a ball structure arranged on the side of the end of the rotating seat facing the adjustment bolt (40). The ball structure is arranged to be able to roll and at least partially protrudes from the end of the rotating seat to form the fourth end that is in rolling cooperation with the end of the adjustment bolt (40). The end of the rotating seat facing away from the ball structure forms the third end that abuts against the second end.
6. The thermostatic expansion valve according to claim 2, wherein, The first transmission structure (51) and the second transmission structure (52) are both ball structures, and the push structure (50) further includes an adapter seat (53). The two ball structures are respectively arranged at two ends of the adapter seat (53), and any one of the ball structures at least partially protrudes from the end of the adapter seat (53) to form the third end and the fourth end which are respectively rollingly matched with the second end and the end of the adjusting bolt (40).
7. The thermostatic expansion valve according to claim 1, wherein The push structure (50) is an annular cylindrical structure.
8. The thermostatic expansion valve according to claim 1, wherein The power head device (20) also includes an upper diaphragm cover (21), a lower diaphragm cover (22), a coil (23), a temperature sensing tube (24) and a filling tube (25); the lower diaphragm cover (22) is fixedly arranged at the opening of the regulating chamber (101) of the valve body (10); the upper diaphragm cover (21) is arranged on the lower diaphragm cover (22); the regulating diaphragm (26) is arranged between the upper diaphragm cover (21) and the lower diaphragm cover (22); the temperature sensing tube (24) is arranged at intervals on one side of the valve body (10); one end of the coil (23) is connected to the cavity between the upper diaphragm cover (21) and the regulating diaphragm (26); the other end of the coil (23) is arranged on the upper part of the temperature sensing tube (24); and the filling tube (25) is arranged on the upper part of the temperature sensing tube (24).
9. The thermostatic expansion valve according to claim 1, wherein, The elastic adjustment component (30) comprises a transmission plate (31), an elastic member (32) and a support seat (33); the adjustment chamber (101) comprises a first sub-chamber extending along the axial direction of the valve body (10) and a second sub-chamber whose extension direction is inclined relative to the axial direction of the valve body (10); the second sub-chamber is communicated with the first sub-chamber and has an internal thread; the support seat (33) is slidably arranged in the first sub-chamber; the transmission plate (31) is arranged at the opening of the first sub-chamber; the support seat (33) has an adjustment head on a side away from the transmission plate (31); the adjustment head and the transmission plate (31) have two sides away from each other forming the second end and the first end respectively; the adjustment bolt (40) is threadedly mounted in the second sub-chamber; the elastic member (32) is sleeved on the outer periphery of the support seat (33) and its two ends are respectively in contact with the transmission plate (31) and the adjustment head.
10. The thermostatic expansion valve according to claim 9, wherein, The valve body (10) also has a valve cavity (102), and the thermal expansion valve also includes a transmission rod (34) and a valve core structure, wherein the valve core structure is arranged in the valve cavity (102), and the transmission rod (34) passes through the support seat (33) and has two ends respectively connected to the transmission plate (31) and the valve core structure.