Bidirectional self-adaptive throttle valve and refrigeration equipment

Abstract

A two-way self-adaptive throttle valve at least comprises two three-way structures and two one-way self-adaptive throttle valve bodies or valve elements, and the two one-way self-adaptive throttle valve bodies or valve elements are fixedly connected in parallel in the reverse direction through the two three-way structures to form an integral structure with two connectors. The one-way self-adaption throttling valve or valve element at least comprises a valve body, a valve seat, a valve needle, a valve needle spring, an adjusting spring and a limiting block, the valve seat and the limiting block are arranged in the valve body, the valve needle spring, the valve needle, the adjusting spring and the like are sequentially arranged in the valve body between the valve seat and the limiting block, the valve needle spring is arranged on the outer side of the front section of the valve needle in a sleeving mode, and the limiting block is arranged in the valve body. The adjusting spring is arranged between the valve needle and the adjusting limiting block, and the valve needle can axially move in the valve body under the action of force to close or open the valve port. According to the utility model, the variable-flow two-way throttling can be realized, the damping effect of the valve needle spring and the adjusting spring is realized, the valve needle is small in vibration and high in reliability, and the control problem of the throttling mechanism can be simplified and automated.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and to a throttling mechanism, specifically to an adaptive throttling valve and an adaptive throttling refrigeration device. Background Technology

[0002] In existing technologies, throttling devices between the evaporator and condenser of refrigeration equipment are generally adjustable flow elements and non-adjustable flow elements. Adjustable flow elements include electronic expansion valves, while non-adjustable flow elements include capillary tubes and throttling tubes (valves). Currently available adjustable flow elements are relatively expensive, especially electronic expansion valves, which require corresponding control strategies and are prone to jamming, resulting in low reliability. Non-adjustable flow elements can only provide a fixed length or fixed opening throttling effect and cannot adjust the throttling effect according to flow rate and pressure changes on both sides, exhibiting poor adaptability to throttling conditions. However, due to their lower cost, they are still widely used in refrigeration equipment. In air conditioning systems where throttling valves are used as throttling devices, the valve changes its throttling direction based on the switching between high and low system pressures. However, in actual use, the valve needle of the throttling valve may jam, affecting the normal operation of the air conditioner. Furthermore, the valve needle of the throttling valve is prone to vibration during axial movement, generating eddies when the refrigerant flows through the valve, resulting in mechanical and flow noise. If flow-adaptive throttling can be achieved in throttling pipes (valves), enabling adaptive throttling of variable flow rates, not only can material and manufacturing costs be saved, but also the cost of control strategies. Therefore, simplifying the control of throttling mechanisms, automating simple problems, adapting to bidirectional switching between cooling and heating, and achieving adaptive throttling under varying flow rates or pressures, reducing noise, lowering failure rates, facilitating maintenance and replacement, improving equipment reliability, and simultaneously meeting the needs of both cooling and heating are pursuits of industry engineers and researchers. Summary of the Invention

[0003] To overcome the defects and shortcomings of existing technologies, this utility model provides a bidirectional adaptive throttling valve and a bidirectional adaptive throttling refrigeration device. This effectively solves the problem that existing expansion valves cannot achieve adaptive throttling under varying flow rates or pressure differences, maintaining cooling or heating effects, reducing the risk of jamming and noise, improving the reliability of refrigeration equipment operation, and effectively and quickly meeting cooling and heating needs. Therefore, this utility model adopts the following technical solution:

[0004] Therefore, the first aspect of this utility model proposes a bidirectional adaptive throttling valve. The second aspect of this utility model proposes a bidirectional adaptive throttling refrigeration device.

[0005] According to one aspect of this utility model, it is achieved through the following technical solution:

[0006] A bidirectional adaptive throttle valve is provided, comprising at least two three-way structures and two one-way adaptive throttle valves or valve cores. The two one-way adaptive throttle valves or valve cores are respectively fixedly connected in parallel with each other in opposite directions by the two three-way structures to form an integral structure with two interfaces.

[0007] The one-way adaptive throttle valve or valve core includes at least a valve body, a valve seat, a valve needle, a valve needle spring, an adjusting spring, and a limiting block. The valve seat is wholly or partially disposed within the valve body, or the front portion of the valve body is inserted into the valve seat for fixed connection, or the valve seat and valve body are an integral structure. The limiting block is wholly or partially disposed within the valve body, or the rear portion of the valve body is inserted into the front portion of the limiting block, or the limiting block and valve body are an integral structure. The limiting block and the valve body are either fixed together, connected by threads, or connected by threads between threaded sleeves fixed to the inner wall of the valve body. The valve needle spring, valve needle, adjusting spring, etc., are sequentially disposed between the valve seat and the valve body. Within the valve body between the limiting blocks, the valve seat is provided with a throttling valve orifice. The front end of the valve needle faces the valve port of the throttling valve orifice. A valve needle spring is sleeved on the outer side of the front section of the valve needle, with one end of the valve needle spring disposed on the valve needle and the other end disposed on the valve seat. An adjusting spring is disposed between the valve needle and the limiting blocks, with one end of the adjusting spring disposed on the tail end or tail portion of the valve needle and the other end disposed on the front portion or front end of the limiting block. The valve needle can move axially, and the front end of the valve needle is a thin needle portion. The valve needle spring provides a thrust that causes the valve needle to move away from the throttling valve orifice, and the adjusting spring provides a preload force that causes the valve needle to move towards the throttling valve orifice. A gap is left between the valve needle and the inner wall of the valve body. The valve needle is subjected to the elastic forces of the valve needle spring and the adjusting spring at its front and rear ends, respectively. Under the action of force, the valve needle can move axially within the valve body to close or open the valve port flow area.

[0008] The valve body and the valve seat can be an integral structure, machined as a single component. The valve seat is part of the valve body and is located at one end of the valve body. The valve seat is provided with a throttle valve orifice, which is connected to an interface of an adaptive throttle valve.

[0009] The valve seat may be wholly or partially disposed within the valve body. Alternatively, the front end of the valve body may be inserted into the valve seat.

[0010] The valve seat may have one or more annular grooves, steps, or cylindrical cavities on one or both end faces. The valve seat has a throttle valve orifice, and its outer surface may have one or more annular grooves for easy roll-press sealing and fixing. The valve seat is located at one end of the valve body, or the valve seat is partially or completely inserted into one end of the valve body for fixed connection, or one end of the valve body is partially inserted into the valve seat for fixed connection. The connection methods include, but are not limited to, welding, roll pressing, interference fit, or threaded connection. To limit the valve needle spring, the outer periphery of the valve seat may extend along the axial direction, forming a cylindrical cavity or cylindrical opening as the valve seat cavity, where part or all of the valve needle spring may be placed. Steps may be provided within the cylindrical cavity or cylindrical opening. The two interfaces of the adaptive throttle valve may also be located on the valve seat, or one may be located on the valve seat and the other on the valve body, one communicating with the throttle valve orifice and the other communicating with the inner cavity of the throttle valve.

[0011] The valve seat and the valve body can also be connected by threads and a sealing device can be added. The relative position of the valve needle can also be adjusted by rotating the threads of the valve seat; or it can be fixed by reducing the diameter of the valve body parts at both ends of the valve seat.

[0012] One or both end faces of the valve seat can be configured as a groove, a cylindrical opening, a recessed cavity, an annular groove, or a step; of course, it can also be configured as a plane.

[0013] The cylindrical space enclosed by the structure extending along the axial direction on the outer side of the valve seat at the valve port end is the valve seat cavity. The valve seat cavity may be provided with a step or annular groove, and an annular cover plate may be provided at the valve seat cavity. One end of the valve needle spring may be located at the annular cover plate.

[0014] The valve seat or valve port end face may be provided with an annular support or annular ring for the adjusting spring, which facilitates limiting the displacement of the adjusting spring.

[0015] The valve needle spring is partially or entirely placed in the valve seat cavity of the valve seat.

[0016] The valve seat can also be a combined structure, comprising at least a valve seat body and a valve orifice core. The valve orifice core is provided with a throttling valve orifice, and the valve seat body is provided with a central hole. The valve orifice core is nested and fixed at the central hole of the valve seat body.

[0017] The inlet and outlet of the throttle valve orifice can be designed in a funnel shape to reduce the generation of flow eddies.

[0018] The valve needle spring is sleeved on the outside of the front section of the valve needle. One end of the valve needle spring can be located on the outer wall of the valve needle, at a step, or in an annular groove, and the other end can be located on the valve seat. Both ends of the valve needle spring can be fixed to the contacting surface, or one end can be fixed while the other end is not fixed, or neither end can be fixed.

[0019] To ensure the valve needle spring end face is flat and maintain the coaxiality of the valve needle and the throttle valve orifice, transition smoothing rings can be provided at one or both ends of the valve needle spring. The purpose of the transition smoothing rings is to allow the valve needle spring to be smoothly mounted on the surface of the object it contacts, maintaining the coaxiality of the valve needle installation.

[0020] The valve needle spring can be a flat-headed spring.

[0021] For simplicity, the valve needle spring may not have transition smoothing rings at either end.

[0022] The outer surface of the valve needle can be composed of the same or different rotating surfaces.

[0023] One or more steps or annular grooves may be provided on the outer side of the valve needle. One end of the valve needle spring may be positioned or limited at the step or annular groove on the outer side of the valve needle.

[0024] An annular groove can be provided at the step of the valve needle, and one end of the valve needle spring can be embedded in the annular groove.

[0025] An axial flow channel may be provided on or outside the valve needle. Of course, an axial flow channel may not be provided on or outside the valve needle.

[0026] The tail or end of the valve needle can be provided with a step, annular groove, recess, cavity, hole, or thin rod to facilitate the installation of the adjusting spring.

[0027] To ensure the flatness of the end face of the adjusting spring and maintain the coaxiality of the valve needle, transition smoothing rings can be provided at one or both ends of the adjusting spring, so that the adjusting spring can be flatly set on the surface of the object it contacts.

[0028] The spring being adjusted can be a flat-headed spring.

[0029] For simplicity, the adjusting spring may not have transition smoothing rings at either end.

[0030] The two ends of the adjusting spring are respectively disposed on the valve needle and the limiting block. Both ends of the adjusting spring can be fixed on the contacting surface, or one end can be fixed while the other end is not fixed, or neither end can be fixed.

[0031] The two ends of the adjusting spring can be fixed to the valve needle and the limiting block respectively, which can effectively prevent the valve needle from rotating.

[0032] The front or front end of the limiting block may be provided with a step, annular groove, recess, cavity, hole, or thin rod to facilitate the installation of the adjusting spring and coaxial positioning.

[0033] A pressure plate or pressure ring for fixing the adjusting spring can be provided between the adjusting spring and the limiting block. An annular step can be provided on the pressure plate or pressure ring, and the limiting block acts on the pressure plate or pressure ring.

[0034] The limiting block can be integrally or partially disposed within the valve body. Alternatively, one end of the valve body can be inserted into the limiting block for fixed connection.

[0035] The outer wall of the limiting block can be provided with grooves or annular grooves, or it can be provided with steps or a smooth rotating body.

[0036] The inner wall of the valve body and the limiting block can be fixedly connected to form an integral structure. The fixing method can be roll forming, welding, or interference fit, or the two ends can be interlocked, or the valve body parts at both ends of the limiting block can be fixed by narrowing or reducing the diameter.

[0037] The valve body and the limiting block can also be an integral structure, machined as a single component, with the limiting block being a part of the valve body.

[0038] An axial flow channel may not be provided on the outside of the limiting block. The front part of the limiting block is surrounded by a cylindrical structure, and the rear end of the valve body may be located inside the limiting block.

[0039] The limiting block may have an axial flow channel or a channel connecting both ends, which is a fluid channel; the limiting block may not have an axial flow channel; one or more annular grooves may be provided on the outer side of the limiting block to facilitate roller pressing and fixing.

[0040] The valve needle may have a cavity or hole at its tail end or tail section, and a step may be provided inside the cavity.

[0041] The front part of the limiting block may also be provided with one or more steps, annular grooves, holes or thin rods, and at least one step on the limiting block has an equivalent diameter greater than the inner diameter of the adjusting spring.

[0042] The adjusting spring and the front section of the limiting block can be placed into the cavity at the tail end or tail of the valve needle. A rigid ball can be provided between the adjusting spring and the bottom of the cavity at the tail end or tail of the valve needle to maintain the balance of the adjusting spring. Alternatively, the rigid ball can be omitted. The adjusting spring can be sleeved on the front section of the limiting block and stop at a step on the limiting block. The equivalent diameter of the step is larger than the inner diameter of the adjusting spring, which can block and compress the adjusting spring.

[0043] The valve needle, adjusting spring, and limiting block can form an adjusting valve needle assembly. The edge of the cavity at the tail end or tail of the valve needle can also be narrowed or a ring or semi-ring retainer can be used to restrict the sliding out of the adjusting spring and the insertion part of the limiting block.

[0044] The valve needle, adjusting spring, and limiting block can form an adjusting valve needle assembly. The two ends of the adjusting spring are respectively located at the tail of the valve needle and the corresponding step or annular groove at the front of the limiting block. The thin rod at the tail of the valve needle can be inserted into the hole at the front of the limiting block, or the thin rod at the front of the limiting block can be inserted into the hole at the tail of the valve needle, thus forming a valve needle assembly.

[0045] The front end or front part of the limiting block can also be configured as a cavity, and a step can be provided in the cavity. The rear section of the valve needle can be provided with one or more steps or annular grooves. At least one step on the valve needle has an equivalent diameter greater than the inner diameter of the adjusting spring.

[0046] The adjusting spring and the tail of the valve needle can be placed into the cavity at the front end or front of the limiting block. A rigid ball can be set between the bottom of the cavity at the front end or front of the limiting block to maintain the balance of the adjusting spring. Alternatively, the rigid ball can be omitted. The adjusting spring can be sleeved on the outside of the rear section of the valve needle and stop at a step on the rear section of the valve needle. The equivalent diameter of the step is larger than the inner diameter of the adjusting spring, which can block and compress the adjusting spring.

[0047] The valve needle, adjusting spring, and limiting block can form an adjusting valve needle assembly. The front end or front cavity edge of the limiting block can also be narrowed or a ring or semi-ring retaining ring can be used to restrict the sliding out of the adjusting spring and the rear part of the valve needle.

[0048] The valve needle, adjusting spring, and limiting block can form an adjusting valve needle assembly, with both ends of the adjusting spring respectively fitted onto the outer side of the steps of the valve needle and the limiting block.

[0049] For easy roller pressing and fixing, after the tension of the adjusting spring is adjusted and the valve needle is in the optimal position, the limiting block can be fixed to the inner wall of the valve body.

[0050] To prevent the valve needle from rotating, a stop rod to prevent the valve needle from rotating may also be provided on the outer edge or outside of the valve needle.

[0051] A filter screen can be installed in one or both interface channels of the bidirectional adaptive throttle valve.

[0052] The two unidirectional adaptive throttle valves or valve cores may have different or the same structure or configuration.

[0053] The second aspect of this utility model proposes a bidirectional adaptive throttling refrigeration device, which includes a bidirectional adaptive throttling valve structure as described in any of the above technical solutions.

[0054] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses variable flow throttling as a bidirectional adaptive throttling valve. Initially, the control limit block makes the valve needle and the valve port in a closed equilibrium state under the action of the valve needle spring and the adjusting spring. When fluid flows in from one inlet of the bidirectional adaptive throttling valve, one forward unidirectional adaptive throttling valve or valve core is opened, while the other reverse adaptive throttling valve or valve core remains closed. When fluid flows through a forward-flowing one-way adaptive throttling valve or a throttling valve orifice on the valve seat in the valve core, as the incoming fluid flow rate or pressure difference increases, the thrust of the fluid on the valve needle also increases. The original valve needle balance is broken, the valve needle moves, the adjusting spring is further compressed, and the valve orifice is opened wider. Under the action of the valve needle spring, the adjusting spring, and the fluid pressure, the forces on the valve needle will rebalance. Similarly, when the flow rate decreases or the pressure difference decreases, the thrust of the fluid on the valve needle decreases, the valve needle spring returns to its original compression, the valve needle moves in the opposite direction, and the valve orifice closes. Under the action of the valve needle spring, the adjusting spring, and the fluid pressure, the forces on the valve needle will rebalance. In reverse flow, the fluid flows in from another inlet, is throttled by another adaptive one-way throttling valve, and then flows out, thus achieving adaptive throttling under bidirectional variable flow rate or variable pressure difference.

[0055] Furthermore, the damping effect of the compressed valve needle spring and the compressed adjusting spring reduces the oscillation of the throttling flow caused by pressure fluctuations, thus reducing noise generated by valve needle vibration. The flared inlet and outlet effectively reduce flow eddies, minimizing or eliminating eddies, further reducing flow noise. Since all components are mechanical, and the damping effect of the springs at both ends of the valve needle minimizes displacement of moving parts and valve needle oscillation, mechanical collision noise can be virtually eliminated. This results in high reliability, eliminates the need for complex control strategies, reduces the unit's failure rate, simplifies and improves the reliability of the refrigeration unit, reduces costs, and facilitates maintenance and replacement. Ultimately, this simplifies the control of the throttling mechanism and automates simple problems. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of a bidirectional adaptive throttle valve.

[0058] Figure 2 This is a schematic diagram of a unidirectional adaptive throttle valve or valve core, which is a bidirectional adaptive throttle valve.

[0059] Figure 3 This is a schematic diagram of another structure of a unidirectional adaptive throttle valve or valve core, which is a bidirectional adaptive throttle valve.

[0060] Figure 4 This is another structural diagram of a unidirectional adaptive throttle valve or valve core, which is a bidirectional adaptive throttle valve.

[0061] Among them, 1-three-way structure, 2-one-way adaptive throttle valve or valve core, 3-one-way adaptive throttle valve or valve core, 4-three-way structure, 6-valve body, 7-valve seat, 8-valve needle spring, 9-valve needle, 10-adjusting spring, 11-limit block, 12-valve body, 13-valve seat, 14-valve needle spring, 15-valve needle, 16-adjusting spring, 17-limit block, 42-valve body, 43-valve seat, 44-valve needle spring, 45-valve needle, 46-adjusting spring, 47-limit block, 48-flow hole on limit block, 49-throttle valve hole Detailed Implementation

[0062] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0063] like Figure 1 As shown in the diagram, this embodiment provides a structural schematic of a bidirectional adaptive throttle valve. It can be implemented as follows:

[0064] First, three-way structure 1, three-way structure 4, one-way adaptive throttle valve or valve core 2, and one-way adaptive throttle valve or valve core 3 are pre-processed or assembled. Then, one-way adaptive throttle valve or valve core 2 and one-way adaptive throttle valve or valve core 3 are connected and fixed to three-way structure 1 and three-way structure 4 in opposite directions to form a combination structure, namely a bidirectional adaptive throttle valve, in which one-way adaptive throttle valve or valve core 2 and one-way adaptive throttle valve or valve core 3 are connected in parallel in opposite directions using three-way structure 1 and three-way structure 4. The other interfaces of three-way structure 1 and three-way structure 4 serve as the inlet and outlet of this bidirectional adaptive throttle valve, respectively. After installation on the refrigeration equipment, depending on the system operating status, the refrigerant fluid can enter the bidirectional adaptive throttle valve from the end of three-way structure 1, while the one-way adaptive throttle valve or valve core 2 is closed, and the fluid can only flow out through the interface of three-way structure 4 after being throttled by the one-way adaptive throttle valve or valve core 3. Conversely, the refrigerant fluid can enter the bidirectional adaptive throttling valve from the three-way structure 4 end, while the one-way adaptive throttling valve or valve core 3 is closed. It can only be throttled by the one-way adaptive throttling valve or valve core 2 before flowing out through the three-way structure 1 interface, thus achieving bidirectional throttling.

[0065] The following is combined Figure 2 , Figure 3 , Figure 4 This will illustrate the implementation of a one-way adaptive throttle valve or valve core.

[0066] like Figure 2 A schematic diagram of a unidirectional adaptive throttle valve or valve core, which is a bidirectional adaptive throttle valve, can be implemented as a unidirectional adaptive throttle valve or valve core as follows:

[0067] The valve body 6, valve seat 7, throttle valve hole, valve needle spring 8, valve needle 9, adjusting spring 10, limit block 11, and flow hole are pre-processed. Then, the pre-processed components are assembled together: first, the valve seat 7 and valve body 6 are assembled and rolled to form the valve body, and then the valve needle assembly is assembled: the adjusting spring 10 is placed into the rear cavity of the valve needle 4, and then the front section of the limit block 11 is inserted and the outer edge of the rear cavity of the valve needle 4 is narrowed, so that the front section of the limit block 11 is kept in the rear cavity of the valve needle 4. Then, the valve needle spring 8 is placed on the prepared valve needle assembly and then placed into the assembled valve body. After the limit block 11 is moved to the appropriate position by external force, the limit block 11 is rolled and fixed inside the valve body 6. The assembly is then complete.

[0068] Figure 3 This is a schematic diagram of another structure for a unidirectional adaptive throttle valve or valve core, which is a bidirectional adaptive throttle valve. It can be implemented as a unidirectional adaptive throttle valve or valve core as follows:

[0069] The valve body 12, valve seat 13, throttle valve hole, valve needle spring 14, valve needle 15, adjusting spring 16, limit block 17, and flow hole are pre-machined. Then, the pre-machined components are assembled together: first, the valve seat 13 and valve body 12 are assembled and rolled to form the valve body, and then the valve needle assembly is assembled: the adjusting spring 116 is placed into the inner cavity of the limit block 17, and then the rear part of the valve needle 15 is inserted and the outer edge of the inner cavity of the limit block 17 is narrowed, so that the rear part of the valve needle 15 is kept in the inner cavity of the limit block 17. Then, the valve needle spring 14 is put on the prepared valve needle assembly and placed into the assembled valve body. After the limit block 17 is moved to the appropriate position by external force, the limit block 17 is rolled and fixed inside the valve body 12. The assembly is then complete.

[0070] Figure 4 This is another structural diagram of a unidirectional adaptive throttle valve or valve core, which is a bidirectional adaptive throttle valve. It can be implemented as follows:

[0071] The valve seat 43 (including the throttle valve hole 49), valve body 42, valve needle spring 44, valve needle 45, adjusting spring 46, and limit block 47 (including the flow hole 48) are pre-machined. Then, the pre-machined components are assembled together: first, the valve seat 43, valve needle spring 44, valve needle 45, adjusting spring 46, and limit block 47 are placed into the valve body 42 in sequence. After adjusting the corresponding spring pressure with tooling, the valve body 42 at the valve seat 43 and limit block 47 is rolled and fixed. The assembly is then complete.

[0072] The above provides a detailed description of one embodiment of the bidirectional adaptive throttle valve and expansion valve provided by this utility model. A specific example has been used to illustrate the principle and implementation of this utility model. The description of the above embodiment is only for the purpose of helping to understand the method and core idea of ​​this utility model.

[0073] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification.

[0075] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front section, rear section, front part, tail part, tail segment, end section", "front end, rear end, upper end, lower end, end", "longitudinal, transverse" and "upper part, lower part, side, bottom surface, front, back, left, right" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0076] Furthermore, it should be noted that the use of words such as "first," "then," and "again" to limit the processing order is merely for the convenience of describing this utility model. Unless otherwise stated, the above words have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0077] It should be noted that, for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0078] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bidirectional adaptive throttle valve, comprising at least two three-way structures and two one-way adaptive throttle valves or valve cores, characterized in that: Two one-way adaptive throttle valves or valve cores are respectively connected in parallel and fixed in opposite directions using two three-way structures to form an integral structure with two interfaces. Each one-way adaptive throttle valve or valve core includes at least a valve body, valve seat, valve needle, valve needle spring, adjusting spring, and limiting block. The valve seat is wholly or partially disposed within the valve body, or the front portion of the valve body is inserted into the valve seat for fixed connection, or the valve seat and valve body are an integral structure. The limiting block is wholly or partially disposed within the valve body, or the rear portion of the valve body is inserted into the front portion of the limiting block. The limiting block and valve body are either fixed together or connected by threads. The valve needle spring, valve needle, adjusting spring, etc., are sequentially arranged in the valve body between the valve seat and the limiting block, either by direct connection or by threaded connection between the threaded sleeves fixed on the inner wall of the valve body. The valve seat is provided with a throttle valve hole. The front end of the valve needle is opposite to the valve opening of the throttle valve hole. The valve needle spring is sleeved on the outside of the front section of the valve needle. One end of the valve needle spring is set on the valve needle, and the other end is set on the valve seat or valve seat cover plate. The adjusting spring is set between the valve needle and the limiting block. One end of the adjusting spring is set on the tail end or tail of the valve needle, and the other end of the adjusting spring is set on the front part or front end of the limiting block.

2. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The valve seat may be an assembly comprising at least a valve seat body and a valve orifice core, wherein the valve orifice core is provided with a throttling valve orifice, the valve seat body is provided with a central hole, and the valve orifice core is nested and fixed at the central hole of the valve seat body.

3. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The valve body and the valve seat can be an integral structure.

4. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The tail or end of the valve needle may be provided with a step, annular groove, recess, cavity, hole, or thin rod.

5. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The front or front end of the limiting block may be provided with a step, annular groove, recess, cavity, hole, or thin rod.

6. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The limiting block is provided with a fluid channel connecting its two ends.

7. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The valve body and the limiting block can be an integral structure.

8. The bidirectional adaptive throttle valve according to claim 1, characterized in that, An axial flow channel is provided on or on the outer side of the limiting block.

9. The bidirectional adaptive throttle valve according to claim 1, characterized in that, The two unidirectional adaptive throttle valves or valve cores may have different or the same structural forms.

10. A bidirectional adaptive throttling refrigeration device, characterized in that, The bidirectional adaptive throttling refrigeration device includes: a bidirectional adaptive throttling valve structure as described in any one of claims 1 to 9.

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