Expansion valve assembly and expansion valve

Abstract

The utility model relates to the technical field of expansion valves, and provides an expansion valve assembly and an expansion valve, the assembly comprises a valve core column, a valve body, a first cover and a second cover. A spiral groove and an annular groove are formed in the axial direction of the valve element column, the sectional area of the spiral groove is gradually increased from the starting point to the end point, and the annular groove is communicated with the end point of the spiral groove. The valve body is provided with a containing cavity penetrating through the two ends, the valve element column is rotatably connected to the containing cavity, the valve body is provided with an input channel and an output channel which communicate the outside with the containing cavity, and when the valve element column is arranged in the containing cavity, the annular groove communicates with the output channel, and only one position of the spiral groove communicates with the input channel. The first cover is arranged at the first end of the valve body; the second cover is arranged at the second end of the valve body. According to the expansion valve assembly, flow adjustment is achieved through the gradually-changed sectional area of the cylindrical surface spiral groove, the precision of flow control and adjustment can be higher and more accurate, due to the fact that the valve element column is in a column shape, the size of the expansion valve assembly can be smaller, and more installation space is prevented from being occupied.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of expansion valve, concretely relates to an expansion valve assembly and expansion. BACKGROUND

[0002] It is an important component in refrigeration system, and is mainly used for throttling and regulating flow. The expansion valve makes the liquid refrigerant of medium temperature and high pressure become wet steam of low temperature and low pressure through throttling, and then absorbs heat in the evaporator to achieve the refrigeration effect. The expansion valve controls the valve flow by the superheat degree change at the end of the evaporator, prevents the insufficient use of evaporator area and the knocking cylinder phenomenon, and ensures the stable operation of the refrigeration system.

[0003] In the refrigeration system, the expansion valve is the only channel connecting high and low pressure refrigerants, and its adaptability directly affects the refrigeration effect and energy efficiency of the refrigeration system. In the existing mature process structure, the capillary tube and the piston type electromagnetic expansion valve are used as the main refrigerant pressure reducing structure. The capillary tube uses its small hole diameter and length to limit the flow speed of high pressure liquid refrigerant to generate pressure drop. Because of its poor adjustability, it is mainly used in refrigeration systems with single refrigeration condition such as refrigerator; the electromagnetic expansion valve adjusts the height of the valve core by using external circuit control electromagnetic coil to obtain different flow area to adjust the flow of high pressure refrigerant per unit time to realize pressure drop. Because of its good controllability, the electromagnetic expansion valve is widely used in variable frequency air conditioners and other places with large adjustable demand.

[0004] However, in the related expansion valve technology, the electromagnetic expansion valve adjusts the height of the valve core by using external circuit control electromagnetic coil to obtain different flow area to adjust the flow of high pressure refrigerant per unit time to realize pressure drop. The precision of controlling and adjusting flow is poor, the volume is large, and more installation space is occupied. UTILITY MODEL CONTENTS

[0005] In view of the above defects of the prior art, the utility model provides an expansion valve assembly to solve at least one of the above technical defects in the prior art, so that the expansion valve can accurately control the adjusting flow, the volume is smaller, and more installation space can be avoided.

[0006] The utility model provides an expansion valve.

[0007] In order to realize the purpose of the utility model, the utility model provides an expansion valve assembly, which comprises:

[0008] The valve core column is provided with a spiral groove on the cylindrical surface in the axial direction, and the cross-sectional area of the spiral groove gradually increases from the starting point to the terminal point,

[0009] The valve core column is provided with an annular groove, and the annular groove is in communication with the terminal point of the spiral groove;

[0010] The valve body is provided with a containing cavity penetrating through two ends of the valve body, and the valve core column is rotatably connected to the containing cavity,

[0011] The valve body is provided with an input channel and an output channel for communicating with the outside and the containing cavity, so that when the valve core column is arranged in the containing cavity, the annular groove is in communication with the output channel, and the spiral groove is only in communication with the input channel at one point;

[0012] A first cover is arranged at the first end of the valve body;

[0013] A second cover is arranged at the second end of the valve body.

[0014] Preferably, the valve body is provided with an input hole and a communication groove,

[0015] The communication groove is arranged along the side wall of the containing cavity of the valve body, and the input hole is in communication with the outside and the communication groove to form the input channel,

[0016] When the valve core column is arranged in the containing cavity, the communication groove is only in communication with the spiral groove at one point.

[0017] Preferably, when the valve core column is arranged in the containing cavity, the vertical depth of the communication groove from the starting point of the spiral groove to the end of the communication groove is less than the vertical height from the starting point of the spiral groove to the end of the spiral groove.

[0018] Preferably, the vertical distance between the end of the communication groove and the end of the spiral groove is greater than 1mm.

[0019] Preferably, the communication groove is arranged in the axial direction of the containing cavity from the first end of the valve body.

[0020] Preferably, the input shaft is fixed to the first end of the valve core column,

[0021] The input shaft protrudes out of the first cover.

[0022] Preferably, a rotation positioning groove and a stop position are arranged at the end face of the first end of the valve core column,

[0023] The first cover is provided with a boss which is matched with the rotation positioning groove, and the stop position can abut against the boss to limit the rotation movement of the valve core column.

[0024] The utility model discloses a second aspect provides a kind of expansion valve, including above-mentioned expansion valve assembly and driving piece,

[0025] The driving piece is drivenly connected with the valve core column to drive the valve core column to rotate.

[0026] Preferably, the drive member is connected with the input shaft of the spool through a coupling.

[0027] Preferably, a connecting seat is arranged between the drive member and the first cover, and is adapted to fix the drive member and the first cover.

[0028] The connecting seat is provided with a hollow cavity, and the output shaft of the drive member and the input shaft of the expansion valve assembly are arranged in the hollow cavity.

[0029] The expansion valve assembly provided by the utility model has the advantages that the spool is columnar, the helical groove is arranged on the cylindrical surface of the spool, the cross-sectional area of the helical groove gradually changes from the starting point to the ending point, the spool is rotationally connected to the accommodating cavity of the valve body, the input channel and the output channel are arranged on the valve body and are in communication with the helical groove at one position and the ending point of the helical groove respectively, the flow rate can be increased when the spool rotates in the positive direction, and the flow rate can be reduced when the spool reverses.

[0030] The expansion valve provided by the utility model has all the advantages of the expansion valve assembly, that is, the expansion valve can also make the control and adjustment of the flow rate more accurate, the volume of the expansion valve can be smaller due to the columnar spool, and more installation space can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. In the drawings similar reference numerals denote similar elements throughout the several views, and the size of the elements in the figures can not be necessarily to scale, emphasis instead being placed upon illustrating the principles of the present application.

[0032] Figure 1 The expansion valve provided by the utility model has all the advantages of the expansion valve assembly, that is, the expansion valve can also make the control and adjustment of the flow rate more accurate, the volume of the expansion valve can be smaller due to the columnar spool, and more installation space can be avoided.

[0033] Figure 2 The expansion valve provided by the utility model has all the advantages of the expansion valve assembly, that is, the expansion valve can also make the control and adjustment of the flow rate more accurate, the volume of the expansion valve can be smaller due to the columnar spool, and more installation space can be avoided.

[0034] Figure 3 The expansion valve provided by the utility model has all the advantages of the expansion valve assembly, that is, the expansion valve can also make the control and adjustment of the flow rate more accurate, the volume of the expansion valve can be smaller due to the columnar spool, and more installation space can be avoided.

[0035] Figure 4 The expansion valve provided by the utility model has all the advantages of the expansion valve assembly, that is, the expansion valve can also make the control and adjustment of the flow rate more accurate, the volume of the expansion valve can be smaller due to the columnar spool, and more installation space can be avoided.

[0036] Figure 5 A structure schematic view of the valve body in the expansion valve assembly provided by the embodiment of the utility model;

[0037] Figure 6 To Figure 5 Side view cross-sectional view;

[0038] Figure 7 A structure schematic view of the first cover in the expansion valve assembly provided by the embodiment of the utility model.

[0039] In the figure:

[0040] 100, valve core column, 110, spiral groove, 120, annular groove, 130, rotation positioning groove, 140, gear position;

[0041] 200, valve body, 210, accommodating cavity, 220, input channel, 221, input hole, 222, communication groove, 230, output channel;

[0042] 300, first cover, 310, boss;

[0043] 400, second cover;

[0044] 500, input shaft;

[0045] 600, driving part;

[0046] 700, shaft coupling;

[0047] 800, connecting seat, 810, hollow cavity. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings.

[0049] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated with it, or a middle element can exist simultaneously. The terms "mount", "one end", "the other end" and similar expressions used herein are only for illustrative purposes.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this document belongs. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0051] The following will be combined with Figures 1 to 7The embodiments of the present application are described. It should be understood that the following description is merely exemplary embodiments of the present application and does not constitute any limitation on the present application. In conjunction with Figures 1 to 7 The embodiment of the present application provides an expansion valve assembly, which comprises a valve core column 100, a valve body 200, a first cover 300 and a second cover 400.

[0052] The spiral groove 110 is arranged on the cylindrical surface of the valve core column 100 in the axial direction of the valve core column 100, and the cross-sectional area of the spiral groove 110 gradually increases from the starting point to the ending point. The cross-sectional area of the starting point of the spiral groove 110 is the smallest, which can be zero; and the cross-sectional area of the ending point of the spiral groove 110 is the largest.

[0053] The annular groove 120 is arranged on the valve core column 100 and is in communication with the ending point of the spiral groove 110. The annular groove 120 can be arranged at the second end of the valve core column 100 and surround the cylindrical surface for 360 degrees.

[0054] The containing cavity 210 penetrating through both ends of the valve body 200 is arranged in the axial direction of the valve body 200, and the valve core column 100 is rotatably connected to the containing cavity 210.

[0055] The valve body 200 is provided with an input channel 220 and an output channel 230 in communication with the outside and the containing cavity 210, so that when the valve core column 100 is arranged in the containing cavity 210, the annular groove 120 can be in communication with the output channel 230, and only one place of the spiral groove 110 can be in communication with the input channel 220. That is, the liquid can enter the spiral groove 110 from the input channel 220, flow into the annular groove 120 after the spiral groove 110, and be discharged to the outside from the output channel 230 in communication with the annular groove 120.

[0056] When the valve core column 100 is positively rotated in the containing cavity 210, the volume of the liquid passing through the spiral groove 110 gradually increases due to the fact that the input channel 220 is in communication with the spiral groove 110 at only one place and the cross-sectional area of the spiral groove 110 gradually increases from the starting point to the ending point, so that the flow regulation is realized.

[0057] When the valve core column 100 is reversely rotated in the containing cavity 210, the volume of the liquid passing through the spiral groove 110 gradually decreases due to the fact that the input channel 220 is in communication with the spiral groove 110 at only one place and the cross-sectional area of the spiral groove 110 gradually increases from the starting point to the ending point, so that the flow regulation is realized.

[0058] The first cover 300 is fixed at the first end of the valve body 200. The first cover 300 is capable of abutting against the valve core column 100 to limit the movement of the valve core column 100 in the axial direction, thereby maintaining the stability of the valve core column 100 when the valve core column 100 rotates in the accommodating cavity 210. Similarly, the second cover 400 is fixed at the second end of the valve body 200, and the second cover 400 is also capable of abutting against the second end of the valve core column 100 to limit the movement of the valve core column 100 in the axial direction, thereby maintaining the stability of the valve core column 100 when the valve core column 100 rotates in the accommodating cavity 210.

[0059] It can be understood that the expansion valve assembly provided by the embodiment of the utility model can realize the adjustment of the flow by gradually changing the cross-sectional area of the spiral groove 110 on the cylindrical valve core column 100, and the flow adjustment precision is higher and more accurate. In addition, the expansion valve assembly has a smaller volume, and the installation space can be saved.

[0060] In combination with Figure 5 and Figure 6 , specifically, in some embodiments of the utility model, the valve body 200 is provided with an input hole 221 and a communication groove 222.

[0061] The communication groove 222 is arranged along the side wall of the accommodating cavity 210 of the valve body 200, that is, the opening of the communication groove 222 faces the accommodating cavity 210, and the communication groove 222 communicates with the accommodating cavity 210. The input hole 221 communicates with the communication groove 222 to form the input channel 220, and the liquid in the external environment can enter the communication groove 222 from the input hole 221. The structure of the input channel 220 is simpler, and the processing and manufacturing are facilitated.

[0062] When the valve core column 100 is arranged in the accommodating cavity 210, the communication groove 222 and the spiral groove 110 only have one communication point, and the liquid enters the spiral groove 110 on the valve core column 100 through the communication groove 222, and then flows into the annular groove 120 after reaching the end point of the spiral groove 110.

[0063] Further, in order to make the valve core column 100 communicate with the valve body 200 when the valve core column 100 is arranged in the accommodating cavity 210, the communication groove 222 and the spiral groove 110 only have one communication point, which ensures the accuracy and feasibility of the expansion valve assembly in adjusting the flow. In some embodiments of the utility model, when the valve core column 100 is arranged in the accommodating cavity 210, the vertical depth of the communication groove 222 from the starting point of the spiral groove 110 to the end of the communication groove 222 is less than the vertical height from the starting point of the spiral groove 110 to the end of the spiral groove 110.

[0064] That is to say, when the communication groove 222 is opened along the axial direction of the accommodating cavity 210 from the first end of the valve body 200, the vertical depth of the communication groove 222 starts from the first end surface of the valve body 200 and is less than the upper end surface of the annular groove 120 of the valve core column 100.

[0065] Of course, the communication groove 222 is opened along the axial direction of the accommodating cavity 210 from the first end of the valve body 200, which can further simplify the structure of the communication groove 222, facilitate processing and manufacturing and save costs.

[0066] Moreover, the vertical distance between the end of the communication groove 222 and the end of the spiral groove 110 is greater than 1 mm, that is, the vertical depth of the communication groove 222 and the distance from the upper end surface of the annular groove 120 of the valve core column 100 are greater than 1 mm, which can ensure the sealing between the end of the communication groove 222 and the end of the spiral groove 110 and avoid leakage and failure of the flow adjusting function of the expansion valve.

[0067] In some embodiments of the utility model, the expansion valve assembly further comprises an input shaft 500, the input shaft 500 is fixed at the first end of the valve core column 100, and the input shaft 500 extends out of the first cover 300. Rotating the input shaft 500 can rotate the valve core column 100, so that the flow adjusting of the expansion valve assembly 100 is more convenient.

[0068] In order to provide a positioning reference for the valve core column 100 and avoid reverse rotation of the valve core column 100, in some embodiments of the utility model, a rotation positioning groove 130 and a stop position 140 are arranged at the first end surface of the valve core column 100. The rotation positioning groove 130 can be arranged at the edge of the first end surface of the valve core column 100 and extend along the axial direction of the valve core column 100 to a certain depth; at this time, the stop position 140 can be the position of the edge of the first end surface of the valve core column 100 which is not extended by the rotation positioning groove 130.

[0069] The first cover 300 is provided with a boss 310, the boss 310 is matched with the rotation positioning groove 130, and the stop position 140 can abut against the boss 310 to limit the rotating movement of the valve core column 100. The first cover 300 covers the first end surface of the valve core column 100, the boss 310 is rotationally embedded in the rotation positioning groove 130, and when the stop position 140 abuts against the boss 310, the rotation of the valve core column 100 can be limited.

[0070] In combination Figure 1 And Figure 2 The utility model discloses an expansion valve, which comprises the expansion valve assembly and a driving member 600.

[0071] The driving member 600 is in driving connection with the valve core column 100 and can drive the valve core column 100 to rotate. The flow throttling adjustment operation of the expansion valve can be realized by controlling the rotation of the driving member 600, thereby improving the electrification and intelligentization degree of the expansion valve. The driving member 600 can be a driving motor.

[0072] It can be understood that the expansion valve provided by the utility model comprises the expansion valve assembly and has all the advantages of the expansion valve assembly. That is, the expansion valve is provided with the columnar valve core column 100, and the helical groove 110 is arranged on the cylindrical surface of the valve core column 100. The cross-sectional area of the helical groove 110 gradually changes from the starting point to the ending point. The valve core column 100 is rotationally connected to the accommodating cavity 210 of the valve body 200, and the valve body 200 is provided with the input channel 220, which is in communication with only one position of the helical groove 110, and the output channel 230, which is in communication with the ending point of the helical groove 110. When the valve core column 100 rotates in the forward direction, the flow can be adjusted to increase, and when the valve core column 100 rotates in the reverse direction, the flow can be adjusted to decrease. The helical groove 110 on the cylindrical surface has a gradually changing cross-sectional area, which can realize flow adjustment and can make the control and adjustment of the flow more accurate. In addition, since the valve core column is columnar, the volume of the expansion valve can be smaller, and the expansion valve can avoid occupying more installation space.

[0073] In some embodiments of the utility model, the expansion valve further comprises a shaft coupling 700. The driving member 600 is connected to the input shaft 500 of the valve core column 100 through the shaft coupling 700. The shaft coupling 700 can make the driving member 600 more stable when driving the valve core column 100 to rotate, so as to ensure the accuracy of the expansion valve.

[0074] In some embodiments of the utility model, the expansion valve further comprises a connecting seat 800. The connecting seat 800 is arranged between the driving member 600 and the first cover 300 and can fix the driving member 600 and the first cover 300.

[0075] The connecting seat 800 is provided with a hollow cavity 810. The output shaft of the driving member 600 and the input shaft 500 of the expansion valve assembly are arranged in the hollow cavity 810. The stability between the driving member 600 and the expansion valve assembly can be ensured.

[0076] In this specification, unless specifically stated and limited otherwise, a first feature being "on" or "under" a second feature can mean that the first and second features are directly in contact, or that the first and second features are indirectly in contact through an intermediate medium. Also, a first feature being "over", "above" and "on top of" a second feature can mean that the first feature is directly on top of or obliquely on top of the second feature, or that the first feature is merely horizontally higher than the second feature. A first feature being "under", "below" and "underneath" a second feature can mean that the first feature is directly underneath or obliquely underneath the second feature, or that the first feature is merely horizontally lower than the second feature.

[0077] In the description of the specification, the description of the terms "preferred embodiment", "further embodiment", "some embodiments", "other embodiments" or "specific examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0078] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. An expansion valve assembly characterized by, The valve core column is provided with a spiral groove on the cylindrical surface in the axial direction, and the cross-sectional area of the spiral groove gradually increases from the starting point to the ending point. The valve core column is provided with an annular groove in communication with the ending point of the spiral groove. The valve body is provided with a receiving cavity penetrating through both ends of the valve body, and the valve core column is rotatably connected to the receiving cavity. The valve body is provided with an input channel and an output channel in communication with the outside and the receiving cavity, so that when the valve core column is arranged in the receiving cavity, the annular groove is in communication with the output channel, and only one point of the spiral groove is in communication with the input channel. A first cover is arranged at the first end of the valve body. A second cover is arranged at the second end of the valve body. The valve body is provided with an input hole and a communication groove, 2. The expansion valve assembly of claim 1, wherein, The communication groove is arranged along the side wall of the valve body where the receiving cavity is arranged, and the input hole is in communication with the outside and the communication groove to form the input channel. When the valve core column is arranged in the receiving cavity, the communication groove is only in communication with one point of the spiral groove.

3. The inflation valve assembly according to claim 2, wherein When the valve core column is arranged in the receiving cavity, the vertical depth of the communication groove from the starting point of the spiral groove to the end of the communication groove is less than the vertical height from the starting point of the spiral groove to the ending point of the spiral groove. The vertical distance between the end of the communication groove and the ending point of the spiral groove is greater than 1mm.

4. The expansion valve assembly of claim 3, wherein, The communication groove is arranged in the axial direction of the receiving cavity from the first end of the valve body.

5. The expansion valve assembly of claim 3, wherein, Further comprising an input shaft, the input shaft is fixed to the first end of the valve core column, 6. The expansion valve assembly of claim 1, wherein, The input shaft protrudes out of the first cover. A rotation positioning groove and a stop position are arranged at the first end surface of the valve core column, 7. The expansion valve assembly of claim 6, wherein, The first cover is provided with a boss, the boss matches the rotation positioning groove, and the stop position can abut against the boss to limit the rotational movement of the valve core column. The inflation valve assembly and a driving member according to any one of claims 1 to 7 are included, 8. An expansion valve characterized by, The driving member is drivingly connected with the valve core column to drive the rotation of the valve core column. Further comprising a coupling, the driving member is connected with the input shaft of the valve core column through the coupling.

9. The expansion valve of claim 8, wherein Further comprising a connecting seat, the connecting seat is arranged between the driving member and the first cover, and is adapted to fix the driving member and the first cover, 10. The expansion valve of claim 9, wherein The connecting seat is provided with a hollow cavity, and the output shaft of the driving member and the input shaft of the inflation valve assembly are arranged in the hollow cavity. ​

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