Control valve

Abstract

The invention relates to the field of adjustment, in particular to a control valve with few parts and a simple structure. At least part of a rotor assembly and at least part of a nut are located in a containing cavity; the nut comprises a body part, at least part of the rotor assembly is in threaded fit with the body part, the rotor assembly moves up and down along the axis of the rotor assembly in the stroke of the control valve switching valve, the nut is provided with a first limiting part and a second limiting part, and the first limiting part and the second limiting part are located on the peripheral side of the body part. The first limiting part and the body part are fixed or integrally formed, the second limiting part and the body part are fixed or integrally formed, the first limiting part and the second limiting part are located at two heights in the corresponding axis direction of the rotor assembly, the control valve has a first state and a second state, in the first state, at least part of the rotor assembly abuts against the first limiting part, and in the second state, at least part of the rotor assembly abuts against the second limiting part; in the second state, at least part of the rotor assembly abuts against the second limiting part, a sliding ring and a spring guide rail are omitted, and the structure is simple.

Description

[Technical field]

[0001] The invention relates to the field of fluid regulation, in particular to an electronic expansion valve. [Background technology]

[0002] refer to Figure 6 A control valve comprises a valve body 1', a housing 4', a valve port 2', a valve core assembly 3' and a nut 6', wherein the housing 4' and the valve body 1' are fixed, the valve core assembly 3' faces the valve port 2', and the nut 6' and the valve body 1' are fixed; the control valve comprises a rotor assembly, the rotor assembly comprises a rotor magnet 51', a rotor connecting portion 52', a stopper 54' and a screw rod 53', the rotor magnet 51' and the rotor connecting portion 52' are fixed, the stopper 54' and the rotor connecting portion 52' are fixed, the screw rod 53' and the rotor connecting portion 52' are fixed, the nut 6' has a first part 61', the first part 61' and the screw rod 53' are threadedly matched, and the control valve comprises a spring guide Rail 7' and slip ring 8', spring guide rail 7' is sleeved on the first part 61' and fixed with nut 6', rotor magnet 51' drives stopper 54' to rotate, slip ring 8' is driven by stopper 54' to spirally rise or fall along spring guide rail 7', that is, slip ring 8' is driven by stopper 54' to rotate circumferentially along lead screw 53' and move axially along lead screw 53', spring guide rail 7' has upper limit part 71' and lower limit part 72', upper limit part 71' and lower limit part 72' limit the up and down movement of slip ring 8' along lead screw 53', and the upper and lower limit of lead screw 53' is realized by setting stopper 54', spring guide rail 7' and slip ring 8'. In the prior art solution, spring guide rail 7' and slip ring 8' need to be assembled first, and then spring guide rail 7' and slip ring 8' are sleeved on the first part 61' as a whole, with many parts and a relatively complicated structure. [Summary of the invention]

[0003] The present invention provides a control valve with fewer parts and a simpler structure;

[0004] A control valve comprises a accommodating chamber, the control valve comprises a nut and a rotor assembly, at least part of the rotor assembly and at least part of the nut are located in the accommodating chamber; the nut comprises a main body, at least part of the rotor assembly is threadedly matched with the main body, during the opening and closing strokes of the control valve, the rotor assembly moves up and down along the axis of the rotor assembly, the nut comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively located on the outer peripheral side of the main body, the first limiting portion and the main body are fixed or integrally formed, the second limiting portion and the main body are fixed or integrally formed, the first limiting portion and the second limiting portion are located at two heights in the axial direction corresponding to the rotor assembly, the control valve has a first state and a second state, in the first state, at least part of the rotor assembly is against the first limiting portion, and in the second state, at least part of the rotor assembly is against the second limiting portion.

[0005] Such a control valve is located on the outer peripheral side of the main body through the first limit part and the second limit part respectively. The first limit part and the main body are fixed or integrally formed, and the second limit part and the main body are fixed or integrally formed. The first limit part and the second limit part are located at two heights corresponding to the axis of the rotor assembly. In the first state, at least part of the rotor assembly is against the first limit part, and in the second state, at least part of the rotor assembly is against the second limit part, thereby realizing the upper and lower limit of the rotor assembly along the axis of the rotor assembly, reducing the slip ring and the spring guide rail, and having a relatively simple structure.

Brief Description of the Drawings

[0006] Figure 1 is a cross-sectional view of an embodiment of a control valve;

[0007] Figure 2 for Figure 1 A magnified view of region A of one embodiment;

[0008] Figure 3 A schematic side view of a nut according to an embodiment;

[0009] Figure 4 A schematic side view of a nut according to another embodiment; Figure 5 A magnified view of area A of another embodiment

[0010] Figure 6 A cross-sectional view of a control valve of the background art.

[0011] Reference numerals:

[0012] Valve body portion 1; housing portion 2; accommodating chamber 3;

[0013] Nut 4, first limiting portion 41, second limiting portion 42, main body portion 43;

[0014] Rotor assembly 5, rotor magnet 51, rotor connection portion 52, screw rod 53, stop portion 54, stop body portion 541, first end portion 5411, second end portion 5412, stop connection portion 542, first arm 543;

[0015] Valve body 1'; valve port 2'; valve core assembly 3'; housing 4';

[0016] Rotor magnet 51', rotor connecting part 52', stopper 54', screw rod 53';

[0017] Nut 6', first portion 61'; spring guide rail 7', upper limit portion 71', lower limit portion 72'; slip ring 8'. [Specific implementation method]

[0018] The technical solution of the specific implementation is described below in conjunction with the accompanying drawings:

[0019] A control valve, comprising a valve body 1 and a housing 2, the valve body 1 and the housing 2 cooperate, the control valve comprises an accommodating chamber 3, at least part of the housing 2 is located on the circumference of the accommodating chamber 3, the control valve comprises a nut 4 and a rotor assembly 5, at least part of the rotor assembly 5 and at least part of the nut 4 are located in the accommodating chamber 3, and the nut 4 is relatively stationary with the housing 2 and the valve body 1 respectively; the nut 4 comprises a body 43, at least part of the rotor assembly 5 and the body 43 are threadedly matched, in the stroke of opening and closing the control valve, the rotor assembly 5 moves up and down along the axis of the rotor assembly 5, and the nut 4 has a first limit The first limiting portion 41 and the second limiting portion 42 are respectively located on the outer peripheral side of the main body 43, the first limiting portion 41 and the main body 43 are fixed or integrally formed, the second limiting portion 42 and the main body 43 are fixed or integrally formed, the first limiting portion 41 and the second limiting portion 42 are located at two heights in the axial direction corresponding to the rotor assembly 5, the control valve has a first state and a second state, in the first state, at least part of the rotor assembly 5 is against the first limiting portion 41, and in the second state, at least part of the rotor assembly 5 is against the second limiting portion 42.

[0020] Such a control valve is located on the outer peripheral side of the main body 43 through the first limiting portion 41 and the second limiting portion 42 respectively. The first limiting portion 41 and the main body 43 are fixed or integrally formed, and the second limiting portion 42 and the main body 43 are fixed or integrally formed. The first limiting portion 41 and the second limiting portion 42 are located at two heights corresponding to the axis of the rotor assembly 5. In the first state, at least part of the rotor assembly 5 is against the first limiting portion 41, and in the second state, at least part of the rotor assembly 5 is against the second limiting portion 42, thereby realizing the upper and lower limiting of the rotor assembly 5 along the axis of the rotor assembly 5, reducing the slip ring and spring guide rail in the background technology, and having a relatively simple structure.

[0021] It should be noted that: "fixation" can be understood as mechanical fixation, welding fixation, or placing one of the parts as an insert in the mold corresponding to another part for molding, and the two objects are fixed after molding; "integrated molding" can be understood as two parts of the same part being formed in the same molding process and becoming a whole.

[0022] For example, the main body 43 is made of plastic, and the first limiting part and the second limiting part are made of metal. The first limiting part and the second limiting part can be inserted into the mold of the main body as inserts. After the main body 43 is formed, the first limiting part and the second limiting part are respectively fixed to the main body 43, and the first limiting part and the second limiting part are made of metal, which improves the strength of the first limiting part and the second limiting part when limiting.

[0023] In one embodiment, reference Figure 1-Figure 4 The control valve includes a rotor assembly 5, which includes a rotor magnet 51, a rotor connecting part 52 and a screw rod 53. The screw rod 53 and the rotor connecting part 52 are fixed or integrally formed. The rotor magnet 51 and the rotor connecting part 52 are fixed or integrally formed. At least a portion of the main body 43 is threadedly matched with the screw rod 53. The main body 43 extends along the axis of the screw rod 53. The first limiting part 41 and the second limiting part 42 respectively protrude from the outer peripheral side of the main body 43 along the radial direction of the main body 43. The rotor assembly 5 includes a stop part 54, which is located at one of the rotor connecting part 52 or the rotor magnet 51.

[0024] Specifically, the rotor connection part 52 and the screw rod 53 are made of metal materials, and the screw rod 53 and the rotor connection part 52 can be fixed by welding; the rotor magnet 51 and the rotor connection part 52 are fixed, that is, the metal rotor connection part 52 is embedded in the mold of the rotor magnet 51 for molding, and then the rotor magnet 51 is magnetized after molding.

[0025] Such a control valve protrudes radially from the outer peripheral side of the main body 43 through the first limiting portion 41 and the second limiting portion 42 respectively. The rotor assembly 5 includes a stop portion 54, and the stop portion 54 is located at one of the rotor connecting portion 52 or the rotor magnet 51, thereby reducing the spring slide rail and slip ring in the background technology and making the structure simpler.

[0026] In one embodiment, reference Figure 1-Figure 4 The stop portion 54 is fixed to or integrally formed with the rotor connecting portion 52, and the stop portion 54 includes a stop body portion 541, which extends along the axis of the screw rod 53, and at least a portion of the stop body portion 541 is located between the first limiting portion 41 and the second limiting portion 42 along the axis direction of the screw rod 53. The two ends of the stop body portion 541 extending along the axis direction of the screw rod 53 are respectively a first end portion 5411 and a second end portion 5412, the first end portion 5411 is an end portion close to the first limiting portion 41, and the second end portion 5412 is an end portion close to the second limiting portion 42, and the distance from the first end portion 5411 to the body portion 43 is smaller than the maximum dimension of the first limiting portion 41 protruding radially along the body portion 43; the distance from the second end portion 5412 to the body portion 43 is smaller than the maximum dimension of the second limiting portion 42 protruding radially along the body portion 43.

[0027] Specifically, the stopper 54 is made of metal material, and is fixed to the rotor connecting portion 52 . The stopper 54 and the rotor connecting portion 52 may be connected by welding.

[0028] Such a control valve, with the first end 5411 being an end close to the first limiting portion 41 and the second end 5412 being an end close to the second limiting portion 42, that is, the first limiting portion 41 limits the first end 5411, and the second limiting portion 42 limits the second end 5412, realizes the upper and lower limiting of the rotor assembly 5 along the axial direction of the screw rod 53, and has a relatively simple structure; at the same time, compared with the technical solution in the background technology, it is simpler to reduce the spring slide rail and the slip ring structure.

[0029] In one embodiment, reference Figure 1-Figure 4 The first limiting portion 41 is located on the side close to the rotor connecting portion 52 along the axial direction of the screw rod 53, and the second limiting portion is located on the side away from the rotor connecting portion 52 in the axial direction of the screw rod 53. The stop portion 54 includes a stop connecting portion 542, and the stop connecting portion 542 is fixed to or integrally formed with the rotor connecting portion 52. At least part of the stop connecting portion 542 extends axially along the rotor assembly 5. At least part of the stop connecting portion 542 is projected radially along the main body portion 43 between the first limiting portion and the second limiting portion. There is a gap between the first limiting portion 41 and the stop connecting portion 542 along the radial direction of the rotor assembly 5.

[0030] In such a control valve, at least a portion of the stop connection portion 542 extends axially along the rotor assembly 5, at least a portion of the stop connection portion 542 is connected to or integrally formed with the first end portion 5411, and a gap is provided between the first limit portion 41 and the stop connection portion 542 along the radial direction of the rotor assembly 5, so that when assembling the rotor magnet 51, the rotor connection portion 52, the stop portion 54 and the screw rod 53, interference between the stop portion 54 and the first limit portion 41 and the second limit portion 42 is avoided.

[0031] In one embodiment, reference Figure 1-Figure 4 The stopper connection part 542 is gradually increased in size along the axial direction of the screw rod 53 toward the rotor connection part 52. In such a control valve, the control valve realizes upper and lower limit by abutting the stopper 54 with the first limit part 41 and the second limit part 42 during multiple opening and closing processes, and the stopper connection part 542 is gradually increased in size along the axial direction of the screw rod 53 toward the rotor connection part 52, so that the size of the connection between the stopper connection part 542 and the rotor connection part 52 is maximized, thereby improving the strength and thus improving the service life of the control valve.

[0032] In one embodiment, reference Figure 1-Figure 4 The stop portion 54 has a first arm 543, which connects the end of the stop connection portion 542 along the axial direction of the screw rod 53 away from the rotor connection portion 52 and the first end 5411 corresponding to the stop body portion 541, and the projection of the first arm 543 along the axial direction of the screw rod 53 extends radially along the nut 4.

[0033] Such a control valve extends radially along the nut 4 through the projection of the first arm 543 along the axial direction of the screw rod 53, so that the distances between the stop connection part 542 and the outer peripheral side surface of the main body part 43 are different between the stop connection part 542 and the stop body part 541, that is, the distance from the stop connection part 542 to the outer peripheral side surface of the main body part 43 is greater than the distance from the stop body part 541 to the outer peripheral side surface of the main body part 43, so as to make assembly space for the first limit part 41, that is, when the rotor magnet 51, the rotor connection part 52, the stop part 54 and the screw rod 53 are assembled, interference between the stop part 54 and the first limit part 41 and the second limit part 42 is avoided.

[0034] In one embodiment, reference Figure 5 The stop portion 54 is fixed to or integrally formed with the rotor magnet 51, and the stop portion includes a stop body portion 541, which extends from the rotor magnet 51 toward the nut 4, and the stop body portion 541 has a first end 5411 and a second end 5412 along the axial direction corresponding to the rotor assembly 5, the first end 5411 is an end close to the first limiting portion 41, and the second end 5412 is an end close to the second limiting portion 42, and the distance from the first end 5411 to the body portion 43 is smaller than the maximum dimension of the first limiting portion 41 protruding radially along the body portion 43; the distance from the second end 5412 to the body portion 43 is smaller than the maximum dimension of the second limiting portion 42 protruding radially along the body portion 43.

[0035] Specifically, the stop portion 54 can be fixed to the rotor magnet 51, that is, the stop portion 54 is placed as a clamp in the mold of the rotor magnet 51, the rotor magnet 51 and the stop portion 54 are formed as one piece, and then the rotor magnet 51 is magnetized to avoid welding and fixing the rotor magnet 51 and the stop portion 54 to avoid damage to the rotor magnet 51.

[0036] Such a control valve has a first end 5411 which is an end close to the first limiting portion 41, and a second end 5412 which is an end close to the second limiting portion 42. That is, the first limiting portion 41 limits the first end 5411, and the second limiting portion 42 limits the second end 5412, thereby realizing the upper and lower limiting of the rotor assembly 5 along the axial direction of the screw rod 53, reducing the spring slide rail and slip ring in the background technology, and making the structure simpler.

[0037] In one embodiment, reference Figure 1-Figure 5 The first limiting portion 41 extends from the main body portion 43 along the radial direction of the main body portion 43 away from the main body portion 43, and the outer dimension of the first limiting portion 41 gradually increases along the radial direction of the main body portion 43 approaching the main body portion 43. The second limiting portion 42 extends from the main body portion 43 along the radial direction of the main body portion 43 away from the main body portion 43, and the outer dimension of the second limiting portion 42 gradually increases along the radial direction of the main body portion 43 approaching the nut 4.

[0038] Such a control valve has the first limit portion 41 gradually increase its outer dimensions along the radial direction of the main body portion 43 approaching the main body portion 43, and the second limit portion 42 gradually increase its outer dimensions along the radial direction of the main body portion 43 approaching the main body portion 43, thereby increasing the strength of the first limit portion 42 and the second limit portion 42.

[0039] In one embodiment, reference Figure 4 The first limiting portion 41 and the second limiting portion 42 are sheet-shaped and extend in the height direction along the axial direction of the screw rod 53. The lower edge of the first limiting portion 41 is the end of the first limiting portion 41 close to the second limiting portion 42, and the lower edge of the first limiting portion 41 has a rounded corner. The upper edge of the second limiting portion 42 is the end close to the first limiting portion 41, and the upper edge of the second limiting portion 42 has a chamfer.

[0040] Such a control valve has a rounded lower edge of the first limit portion 41 and a chamfered upper edge of the second limit portion 42, so as to avoid the first end 5411 and the lower edge of the first limit portion 41 from getting stuck during the process of the rotor magnet 51 driving the stop portion 54 to rotate, and to avoid the first end 5411 and the upper edge of the first limit portion 41 from getting stuck, thereby ensuring the effectiveness of the upper and lower limits of the screw rod 53.

[0041] In one embodiment, the stopper 54 is a metal wire; or the stopper 54 is a sheet-like structure of a metal material, and the sheet-like extension surface corresponding to the stopper 54 is the contact surface between the first limiting portion 41 or the second limiting portion 42 and the stopper 54.

[0042] In such a control valve, the stop part 54 is a metal wire, and the elasticity of the metal wire can be used to provide a margin for the stroke of the screw rod 53 during the opening and closing of the valve, thereby avoiding hard contact between the screw rod 53 and the valve body part 1, and the nut 4 and the rotor connecting part, which may cause damage; the sheet-like extended surface corresponding to the stop part 54 is the contact surface between the first limit part 41, the second limit part 42 and the stop part 54, so that the contact between the stop part 54 and the first limit part 41, and the contact between the stop part 54 and the second limit part 42 is surface contact, thereby increasing the contact area and ensuring the reliability of the limit.

[0043] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A control valve, comprising a receiving chamber (3), a nut (4) and a rotor assembly (5), at least a portion of the rotor assembly (5) and at least a portion of the nut (4) being located in the receiving chamber (3), characterized in that: The nut (4) comprises a main body (43), at least part of the rotor assembly (5) is threadedly matched with the main body (43), and during the stroke of opening and closing the control valve, the rotor assembly (5) moves up and down along the axial direction of the rotor assembly (5), and the nut (4) comprises a first limiting portion (41) and a second limiting portion (42), wherein the first limiting portion (41) and the second limiting portion (42) are respectively located on the outer peripheral side of the main body (43); the first limiting portion (41) and the main body (43) are fixedly connected to each other. The second limiting portion (42) and the main body (43) are fixed or integrally formed; the first limiting portion (41) and the second limiting portion (42) are fixed or integrally formed; the first limiting portion (41) and the second limiting portion (42) are located at two heights in the axial direction corresponding to the rotor assembly (5); the control valve has a first state and a second state; in the first state, at least a portion of the rotor assembly (5) is against the first limiting portion (41); in the second state, at least a portion of the rotor assembly (5) is against the second limiting portion (42).

2. The control valve according to claim 2, characterized in that: The rotor assembly (5) comprises a rotor magnet (51), a rotor connecting portion (52) and a screw rod (53); the screw rod (53) and the rotor connecting portion (52) are fixed or integrally formed; the rotor magnet (51) and the rotor connecting portion (52) are fixed or integrally formed; at least a portion of the body portion (43) is threadedly engaged with the screw rod (53); the body portion (43) extends along the axis of the screw rod (53); the first limiting portion (41) and the second limiting portion (42) respectively protrude from the outer peripheral side of the body portion (43) along the radial direction of the body portion (43); and the rotor assembly (5) comprises a stop portion (54); the stop portion (54) is located at one of the rotor connecting portion (52) or the rotor magnet (51).

3. The control valve according to claim 2, characterized in that: The stopper (54) is fixed to or integrally formed with the rotor connecting portion (52), and the stopper (54) comprises a stopper body (541), and the stopper body (541) extends along the axis of the screw rod (53), and at least a portion of the stopper body (541) is located between the first limiting portion (41) and the second limiting portion (42) along the axis of the screw rod (53), and the two ends of the stopper body (541) extending along the axis of the screw rod (53) are respectively a first end (5411) and a second end (5412). The first end portion (5411) is an end portion close to the first limiting portion (41), the second end portion (5412) is an end portion close to the second limiting portion (42), the distance between the first end portion (5411) and the main body portion (43) is smaller than the maximum dimension of the first limiting portion (41) protruding radially along the main body portion (43); the distance between the second end portion (5412) and the main body portion (43) is smaller than the maximum dimension of the second limiting portion (42) protruding radially along the main body portion (43).

4. The control valve according to claim 3, characterized in that: The first limiting portion (41) is located on the side close to the rotor connecting portion (52) along the axial direction of the screw rod (53), and the second limiting portion is located on the side away from the rotor connecting portion (52) along the axial direction of the screw rod (53). The stopping portion (54) includes a stopping connecting portion (542), and the stopping connecting portion (542) is fixed to or integrally formed with the rotor connecting portion (52). At least a portion of the stopping connecting portion (542) extends axially along the rotor assembly (5), and a gap is provided between the first limiting portion (41) and the stopping connecting portion (542) along the radial direction of the rotor assembly (5).

5. The control valve according to claim 4, characterized in that: The outer dimensions of the stop connection portion (542) gradually increase along the axial direction of the screw rod (53) toward the rotor connection portion (52).

6. The control valve according to claim 4, characterized in that: The stop portion (54) has a first arm (543), the first arm (543) connecting the end of the stop connection portion (542) axially away from the rotor connection portion (52) along the screw rod (53) and the first end (5411) corresponding to the stop body portion (541), and the projection of the first arm (543) along the axial direction of the screw rod (53) extends radially along the nut (4).

7. The control valve according to claim 2, characterized in that: The stop portion (54) is fixed to or integrally formed with the rotor magnet (51), and the stop portion (54) includes a stop body portion (541), and the stop body portion (541) extends from the rotor magnet (51) toward the nut (4), and the stop body portion (541) has a first end portion (5411) and a second end portion (5412) along the axial direction corresponding to the rotor assembly (5), the first end portion (5411) is an end portion close to the first limiting portion (41), and the second end portion (5412) is an end portion close to the second limiting portion (42), and the distance between the first end portion (5411) and the body portion (43) is less than the maximum dimension of the first limiting portion (41) protruding radially along the body portion (43); and the distance between the second end portion (5412) and the body portion (43) is less than the maximum dimension of the second limiting portion (42) protruding radially along the body portion (43).

8. The control valve according to claim 3 or 7, characterized in that: The first limiting portion (41) extends from the main body (43) along the radial direction of the main body (43) away from the main body (43), and the outer dimensions of the first limiting portion (41) gradually increase along the radial direction of the main body (43) approaching the main body (43). The second limiting portion (42) extends from the main body (43) along the radial direction of the main body (43) away from the main body (43), and the outer dimensions of the second limiting portion (42) gradually increase along the radial direction of the main body (43) approaching the nut (4).

9. The control valve according to claim 3 or 7, characterized in that: The first limiting portion (41) and the second limiting portion (42) are sheet-shaped and extend in a height direction along the axial direction of the screw rod (53); the lower edge of the first limiting portion (41) is an end of the first limiting portion (41) away from the second limiting portion (42); the lower edge of the first limiting portion (41) has a rounded corner; the upper edge of the second limiting portion (42) is an end close to the first limiting portion (41); the upper edge of the second limiting portion (42) has a rounded corner.

10. The control valve according to any one of claims 1 to 7, characterized in that: The stopper (54) is a metal wire; Alternatively, the stop portion (54) is a sheet-like structure of a metal material, and the sheet-like extension surface corresponding to the stop portion (54) is a contact surface between the first limiting portion (41) or the second limiting portion (42) and the stop portion (54).

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