CN212746974U - Throttling device and air conditioning system - Google Patents

Abstract

The utility model relates to a throttling arrangement and air conditioning system. The throttling device comprises a valve seat and a columnar valve core, wherein the valve seat is provided with a valve cavity and a valve port communicated with the valve cavity; the valve core is arranged in the valve cavity and can axially slide relative to the valve cavity; the end part of the valve core penetrates through the valve port and is used for controlling the flow passing through the valve port, and a plurality of abutting bulges which are contacted with the inner wall of the valve cavity are respectively arranged on the outer wall of the valve core along the axial direction and the circumferential direction of the valve core. This throttling arrangement is protruding through setting up the butt on the case to reduce the area of contact between case and the disk seat, and then can make the case slide in the disk seat steadily, thereby avoid taking place the card of case subassembly and pause or the dead phenomenon of card, and make throttling arrangement open or closed better.

Description

Throttling device and air conditioning system

Technical Field

The utility model relates to a indirect heating equipment technical field especially relates to a throttling arrangement and air conditioning system.

Background

The air conditioning system is provided with a throttling device connected between the condenser and the evaporator, and the throttling device is used for controlling the flow of the refrigerant in the air conditioning system. The existing throttling device comprises a valve core and a valve seat, and when the throttling device is opened or closed, the valve core is easy to be blocked or even deadly when moving in the valve seat.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide an improved throttling device and air conditioning system. The utility model provides a throttling arrangement is protruding through setting up the butt on the case to reduce the area of contact between case and the disk seat, and then can make the case slide in the disk seat steadily, thereby avoid taking place the card of case subassembly and pause or the dead phenomenon of card, and make throttling arrangement open or closed better.

A throttling device comprises a valve seat and a columnar valve core, wherein the valve seat is provided with a valve cavity and a valve port communicated with the valve cavity;

the valve core is arranged in the valve cavity and can axially slide relative to the valve cavity; the end part of the valve core penetrates through the valve port and is used for controlling the flow passing through the valve port, and a plurality of abutting bulges which are contacted with the inner wall of the valve cavity are respectively arranged on the outer wall of the valve core along the axial direction and the circumferential direction of the valve core.

Furthermore, the throttling device also comprises an elastic element, one end of the valve core faces the valve port, and the other end of the valve core is abutted to the valve seat through the elastic element; the valve core is coaxially arranged with the valve seat through the abutting convex part.

Furthermore, the valve core comprises at least one section of connecting part, one end of the connecting part is abutted against the elastic part, and the other end of the connecting part faces the valve port;

the connecting part is set to be a quadrangular prism, four transition chamfers are arranged on four side edges of the quadrangular prism, and the four chamfers are respectively correspondingly and convexly arranged on the abutting protrusions.

Furthermore, two rows of the abutting protrusions are arranged at different heights of the connecting part along the axis of the valve core, and the number of the abutting protrusions in each row is at least two and is arranged along the circumferential direction of the valve core.

Further, the valve core also comprises a valve needle part connected with one end of the connecting part facing to the valve port, and the maximum movable distance of the valve core in the valve cavity is smaller than the length of the valve needle part.

Furthermore, the throttling device also comprises a stop piece embedded in the valve seat, one end of the elastic piece is abutted against the valve core, and the other end of the elastic piece is abutted against the stop piece; the valve core is connected with the stop part through the elastic part, and when the valve core opens the valve port to the maximum degree, one end of the valve core is abutted against the stop part.

Further, when the valve core closes the valve port, a moving gap is formed between the valve core and the stop piece.

Further, a flow gap is arranged between the stop piece and the inner wall of the valve seat.

Furthermore, the throttling device also comprises a valve pipe and a filtering component, the valve pipe is provided with an inlet end and an outlet end, and the valve seat is arranged in the valve pipe; the filter assembly is disposed at the inlet end of the valve tube.

The utility model also provides an air conditioning system, air conditioning system includes as above-mentioned arbitrary one throttling arrangement.

The utility model provides a throttling arrangement is protruding through setting up the butt on the case to reduce the area of contact between case and the disk seat, and then can make the case slide in the disk seat steadily, thereby avoid taking place the card of case subassembly and pause or the dead phenomenon of card, and make throttling arrangement open or closed better.

Drawings

Fig. 1 is a schematic disassembled view of a throttle device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a valve seat in the throttling device of FIG. 1;

FIG. 3 is a schematic structural diagram of a valve core in the throttling device shown in FIG. 1;

FIG. 4 is a schematic view of the valve cartridge of FIG. 3 from another perspective;

FIG. 5 is a schematic cross-sectional view of the throttle device of FIG. 1 in an assembled, closed state;

FIG. 6 is a schematic cross-sectional view of the throttle device of FIG. 5 in an assembled, open state;

FIG. 7 is an enlarged schematic view of the throttling device shown in FIG. 6 at A;

fig. 8 is a schematic structural view of a stopper of the throttle device shown in fig. 1.

Description of the element reference numerals

100. A throttling device; 10. a valve seat; 11. a valve cavity; 12. a valve port; 13. a communication port; 14. an installation part; 141. a flow channel; 15. a flared part; 20. a valve core assembly; 21. a valve core; 211. a first guide portion; 212. a connecting portion; 2121. an abutment projection; 213. a valve needle portion; 2131. a holding portion; 2132. a flow guide part; 2133. an adjustment section; 22. an elastic member; 30. a valve tube; 31. an inlet end; 32. an outlet end; 40. a stopper; 41. a second guide portion; 42. a clamping part; 43. a flow port; 50. a filter assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a disassembled schematic view of a throttle device 100 according to an embodiment of the present invention.

The utility model provides a throttling arrangement 100 connects between condenser and the evaporimeter in air conditioning system for the throttle step-down.

Of course, the throttle device 100 may also be applied to other systems, such as a refrigeration system of a refrigerator.

The throttling device 100 includes a valve seat 10 and a valve core assembly 20, wherein the valve core assembly 20 is arranged in the valve seat 10 and can control the opening or closing of the valve seat 10. The valve seat 10 is used for accommodating a valve core assembly 20, and the valve core assembly 20 can move in the valve seat 10 and is used for controlling the opening and closing of the valve seat 10. When the pressures of the refrigerants at the two ends of the valve seat 10 are different, the refrigerant pushes the valve core assembly 20 to move in the valve seat 10 by the pressure difference, so that the valve seat 10 is opened.

In one embodiment, the flow restriction device 100 further comprises a valve tube 30. The valve seat 10 and the valve core assembly 20 are arranged in the valve pipe 30; both ends of the valve tube 30 are connected to the condenser and the evaporator, respectively, through pipes. The valve tube 30 includes an inlet end 31 and an outlet end 32; the inlet end 31 and the outlet end 32 are respectively used for connecting with an external pipeline. The arrangement is such that the valve seat 10 and the valve core assembly 20 arranged in the valve tube 30 can be replaced integrally when a problem occurs, so as to simplify the corresponding replacement process; at the same time, the valve tube 30 can be reused.

It will be appreciated that in other embodiments, the valve tube 30 may be omitted and both ends of the valve seat 10 may be extended directly and used for connection to external piping.

Referring to fig. 2, fig. 2 is a schematic cross-sectional view of the valve seat 10 of the throttling device 100 shown in fig. 1.

The valve seat 10 is substantially cylindrical, and a valve cavity 11, a valve port 12 and a communication port 13 are formed in the valve seat 10. The valve port 12 is arranged on one side of the valve seat 10 relatively close to the inlet end 31; the communication port 13 is opened on one side of the valve seat 10 relatively close to the outlet end 32; the valve port 12 and the communication port 13 communicate with each other through the valve chamber 11. The valve port 12 is used for communicating with the inlet end 31 of the valve pipe 30 and is matched with the valve core assembly 20 to enable refrigerant to flow into the valve cavity 11; the communication port 13 is used for allowing the refrigerant to flow out of the valve cavity 11; the valve cavity 11 is used for accommodating the valve core assembly 20 and allowing the valve core assembly 20 to move in the axial direction in the valve cavity 11.

In one embodiment, the valve seat 10 has a positioning groove (not numbered) formed on the outer circumference thereof; the valve tube 30 is riveted or the like so that the wall surface of the valve tube 30 is partially embedded in the positioning groove and the valve seat 10 is fixed in the valve tube 30. So set up for the installation cost of valve seat 10 is lower, and convenient to operate.

In one embodiment, the end of the valve seat 10, which is opened with the valve port 12, is contracted in the radial direction to form a mounting portion 14, and the mounting portion 14 is used for abutting against the valve core assembly 20. The mounting portion 14 is provided such that a flow passage 141 extending in a constant diameter is formed between the valve port 12 and the valve chamber 11. The flow passage 141 extends in a radial direction at an end relatively close to the valve chamber 11 and forms a flared portion 15, and an inner wall of the flared portion 15 is a slope. The flared portion 15 is used for partially abutting against the valve core assembly 20, so that the inner wall of the flared portion 15 is in inclined surface fit with the valve core assembly 20.

It will be appreciated that in other embodiments, the flared portion 15 may not be provided or configured in other configurations of equal or reduced diameter, as long as it is capable of cooperating with the cartridge assembly 20 and controlling the opening or closing of the flow channel 141.

Referring to fig. 3 to 7, fig. 3 is a schematic structural diagram of a valve element 21 of the throttling device 100 shown in fig. 1; FIG. 4 is a schematic view of the valve core 21 shown in FIG. 3 from another perspective; FIG. 5 is a schematic cross-sectional view of the throttle device 100 of FIG. 1 in an assembled, closed state; FIG. 6 is a schematic cross-sectional view of the throttle device 100 of FIG. 5 in an assembled, open state; fig. 7 is an enlarged schematic view of the throttle device 100 shown in fig. 6 at a.

The valve core assembly 20 comprises a valve core 21 and an elastic element 22, one end of the valve core 21 penetrates through the flared part 15 and extends into the flow channel 141, and the other end penetrates through the elastic element 22 and abuts against the elastic element 22; the valve body 21 abuts against the inner wall of the flared portion 15 by the elastic force of the elastic member 22. The valve core 21 is used for matching with the flared part 15 and controlling the opening or closing of the flow channel 141; the elastic member 22 is used for providing a corresponding elastic force for the valve core 21 so that the valve core 21 abuts against the inner wall of the flared portion 15.

It is understood that in other embodiments, the elastic element 22 is not necessarily a component, and the valve core 21 may be driven by other components, such as a motor and a screw rod, as long as the movement of the valve core 21 relative to the valve port 12 can be driven.

The valve body 21 is substantially columnar. The valve body 21 includes a first guide portion 211, a connecting portion 212, and a needle portion 213, which are sequentially provided. The diameters of the first guide portion 211 and the connecting portion 212 are sequentially increased; the valve needle portion 213 has a diameter smaller than that of the connection portion 212, and a portion capable of protruding into the flared portion 15 and sealing the flow passage 141. The first guide portion 211 is used for the elastic member 22 to penetrate through and guiding the elastic member 22 to move along the axial direction; the connecting part 212 is used for abutting against the inner wall of the valve cavity 11 and providing radial supporting force for the valve core 21, and the step surface between the connecting part 212 and the first guide part 211 is used for abutting against the elastic piece 22, so that the elastic piece 22 can be smoothly abutted against the valve core 21 and provide elastic force for the valve core 21; valve needle portion 213 is adapted to interact with flared portion 15 and to close flow passage 141.

It will be appreciated that in other embodiments, the poppet 21 may be provided in other shapes, such as a spherical shape, so long as it is capable of moving within the valve seat 10 and engaging and blocking the flow passage 141.

In one embodiment, the first guiding portions 211 are all of a cylindrical structure with a constant diameter. One end of the first guide portion 211 is connected to the connection portion 212, and the other end thereof extends into the elastic member 22 so that the valve body 21 can be pressed against the valve seat 10 by the elastic member 22. The diameter of the first guide portion 211 is adapted to the size of the elastic member 22, and enables the elastic member 22 to move in the axial direction of the valve seat 10.

The existing throttling device comprises a valve core and a valve seat, and when the throttling device is opened or closed, the valve core is easy to be blocked or even deadly when moving in the valve seat. In order to avoid the above phenomenon, at least two abutting protrusions 2121 are provided on the outer periphery of the connecting portion 212, and the valve element 21 contacts the valve seat 10 through the abutting protrusions 2121 to reduce the contact area between the valve element 21 and the valve seat 10, so that the valve element 21 can smoothly slide in the valve seat 10 in the axial direction, and the occurrence of the phenomenon that the valve element 21 is jammed or jammed in the valve seat 10 is reduced.

In one embodiment, the connecting portion 212 is substantially a quadrangular prism with a square cross section, and the connecting portion 212 is disposed between the first guide portion 211 and the needle portion 213. The four joints on the four sides of the connecting part 212 are respectively provided with the abutting protrusions 2121; the abutment projection 2121 projects toward the valve seat 10. The abutment projection 2121 is used to abut the valve element 21 against the valve seat 10.

It is understood that in other embodiments, the connecting portion 212 may be provided with other structures, such as a column or a triangular prism with a kidney-shaped cross section, as long as a certain space is formed between the connecting portion and the inner wall of the valve cavity 11 and the abutting protrusion 2121 is correspondingly provided; the abutting protrusions 2121 may be only provided at the corners of two of the connecting portions 212, as long as the radial abutting force can be provided for the valve element 21.

In one embodiment, the connecting portions of the four side surfaces of the connecting portion 212 are respectively provided with a transitional chamfer, and the four chamfers are respectively correspondingly provided with the abutting protrusions 2121; the four abutment projections 2121 are the same size and are provided at the same height from the end position of the spool 21. With such an arrangement, a radial abutting force can be provided for the valve element 21, and the valve element 21 and the valve seat 10 are coaxially arranged.

It is understood that if the abutment protrusion 2121 is provided outside the connecting portion 212 having an irregular shape, the size of the abutment protrusion 2121 may be different as long as the valve element 21 can be moved in the axial direction of the valve seat 10 by the abutment protrusion 2121.

In one embodiment, the connecting portion 212 is provided with a row of the abutting protrusions 2121 at two different heights of the axis of the valve core 21, respectively, and each row of the abutting protrusions 2121 is at least two and is arranged along the circumferential direction of the valve core 21 in consideration of the stability of the movement of the valve core 21 in the valve chamber 11.

Specifically, two abutment projections 2121 may be provided at each of the above-mentioned chamfered corners, so that two rows of abutment projections 2121 are formed. The valve core 21 is abutted against the inner wall of the valve chamber 11 by two rows of abutting protrusions 2121 (eight abutting protrusions 2121 in total). With this arrangement, the valve body 21 can be stably moved in the axial direction of the valve seat 10 while reducing the occurrence of jamming or seizure of the valve body 21.

It is understood that in other embodiments, three or more abutting protrusions 2121 are provided for each chamfer in the axial direction, as long as the valve element 21 can be connected to the valve seat 10 by the abutting protrusions 2121 and can move in the axial direction.

In one embodiment, the two abutting protrusions 2121 at the same chamfer are respectively disposed at two vertexes relatively close to the chamfer, so that the abutting protrusions 2121 can provide uniform and stable abutting force for the valve element 21, and the integral processing of the valve element 21 is facilitated.

It is understood that, if the stability of the abutment and the convenience of processing are not considered, the abutment protrusion 2121 at the same chamfer may be disposed at other positions, such as the mutually connected abutment protrusions 2121, as long as the valve element 21 is connected with the valve seat 10 by the abutment protrusion 2121 and can move in the axial direction.

In one embodiment, the abutment protrusion 2121 is an arc-shaped convex part, so that the abutment protrusion 2121 contacts the inner wall of the valve chamber 11 through an arc-shaped vertex. With the arrangement, the valve core 21 can be stably contacted with the inner wall of the valve cavity 11, and the contact area can be reduced as much as possible, so that the risk of jamming of the valve core 21 is reduced.

In one embodiment, the needle portion 213 includes a holding portion 2131, one end of the holding portion 2131 is fixedly connected to the connecting portion 212, and the other end abuts against the flared portion 15. The abutting portion 2131 abuts against the inner wall of the flared portion 15 and is capable of sealing the flow path 141.

Specifically, the outer peripheral surface of the abutting portion 2131 is a conical surface, and the taper of the abutting portion 2131 is adapted to the taper of the flared portion 15; which mate with each other and are capable of plugging the flow channel 141. The outer peripheral surface of the abutting portion 2131 is in inclined surface fit with the inner wall of the flared portion 15, so that the flow passage 141 is sealed.

It is understood that, in other embodiments, the taper of the abutting portion 2131 and the taper of the flared portion 15 do not need to be adapted to each other, and the abutting portion 2131 may abut against the inner wall of the flared portion 15 to block the flow channel 141.

In one embodiment, the width of the outer peripheral surface of the abutting portion 2131 is greater than the width of the inner wall of the flared portion 15, and the maximum outer diameter of the abutting portion 2131 is greater than the maximum inner diameter of the flared portion 15. With this arrangement, the abutting portion 2131 can be stably abutted against the inner wall of the flared portion 15.

It is understood that in other embodiments, the abutting portion 2131 may be a columnar structure with a constant diameter, as long as it can abut against the inner wall of the flared portion 15 and block the flow channel 141.

In one embodiment, the end of the abutting portion 2131 is further provided with a flow guiding portion 2132. The guide portion 2132 has a substantially cylindrical shape, and has an outer diameter smaller than the inner diameter of the flow passage 141. One end of the flow guiding part 2132 is connected with the abutting part 2131, and the other end of the flow guiding part can extend into the flow channel 141, so that a gap is formed between the outer wall of the flow guiding part 2132 and the inner wall of the flow channel 141; the gap is used for the flow of the refrigerant. The flow guide portion 2132 is used for guiding the refrigerant to flow into the valve cavity 11 along the outer wall thereof.

It is understood that in other embodiments, the flow guide portion 2132 may be configured in other shapes, such as a needle shape or a frustum, as long as the refrigerant can be guided.

In one embodiment, the abutting portion 2131 is further provided with an adjusting portion 2133 between the flow guiding portions 2132; the outer periphery of the adjusting part 2133 is provided with a conical surface; the outer diameter of the end of the adjusting part 2133 connected with the abutting part 2131 is larger than that of the end of the adjusting part 2133 connected with the flow guiding part 2132. The taper range of the adjusting part 2133 can be correspondingly set according to the area of the circulation required actually; alternatively, a different size adjustment portion may be selected as the valve body 21 and applied to the throttle device 100. The guide portion 2132 and the partial adjustment portion 2133 extend out of the flow path 141 in the closed state.

When the pressure of the refrigerant at the inlet end 31 is greater than that at the outlet end 32, the refrigerant overcomes the elastic force of the elastic member 22 and drives the abutting portion 2131 of the valve plug 21 to be separated from the inner wall of the flared portion 15, so that the flow passage 141 is opened; when the pressure of the refrigerant at the inlet end 31 is less than or equal to the pressure at the outlet end 32, the valve element 21 is pressed by the elastic element 22, and the pressing portion 2131 presses against the inner wall of the flared portion 15 again, so that the flow passage 141 is closed.

In one embodiment, the maximum moving distance of the valve element 21 is equal to the length of the flow guide portion 2132 and the adjusting portion 2133 of the valve element 21 extending out of the flow channel, so that the end surface of the flow guide portion 2132 of the valve element 21 is flush with the end surface of the flow channel 141 away from the flared portion 15 in the open state, as shown in fig. 6 and 7. With such an arrangement, the valve element 21 can stably move in the valve seat 10, and the flow guide portion 2132 of the valve element 21 is prevented from coming off the flow channel 141 under the impact of the refrigerant, so that the valve element 21 is prevented from being stuck in the valve seat 10.

In one embodiment, as shown in fig. 5 to 7, the elastic member 22 is a compression spring, one end of which abuts against the valve element 21 and the other end of which abuts against the inner wall of the valve seat 10. The pressure difference between the refrigerant at the inlet end 31 and the refrigerant at the outlet end 32 overcomes the elastic force of the elastic member 22 itself, so that the valve body 21 can move in the axial direction toward the communication port 13 and accordingly open the flow passage 141. With this arrangement, the valve body 21 can open or close the flow path 141 by the elastic member 22 without separately connecting a power source.

It is understood that in other embodiments, the elastic member 22 may be provided as a tension spring or other elastic element; one end of the tension spring is fixed to the connecting portion 212, and the other end is fixed to the mounting portion 14, as long as it can provide an elastic force to return the valve body 21 to a position of blocking the flow path 141.

Referring to fig. 8, fig. 8 is a schematic structural view of the stopper 40 of the throttling device 100 shown in fig. 1.

In one embodiment, the throttle device 100 further comprises a stop 40. The stopper 40 has a cross section substantially in the shape of a "T", and the stopper 40 is fixed to an end of the valve seat 10 away from the valve port 12 and is disposed coaxially with the valve seat 10. The stopper 40 includes a second guide portion 41 and a catching portion 42 fixedly connected in sequence. The second guiding portion 41 is used for penetrating the elastic member 22 and guiding the expansion of the elastic member 22; the snap-in portion 42 is used to fix the stopper 40 in the valve seat 10. By the arrangement, the integral installation of the valve core 21, the elastic piece 22 and the stop piece 40 is more convenient and simpler.

It is understood that in other embodiments, the second guide portion 41 may be omitted, and the elastic member 22 may directly fit over the first guide portion 211, with one end abutting against the connecting portion 212 of the valve body 21 and the other end abutting against the engaging portion 42 of the stopper 40.

Specifically, the second guide portion 41 has a cylindrical shape, the diameter of the second guide portion 41 is adapted to the diameter of the elastic member 22 and can extend into the elastic member 22, and the diameter of the second guide portion 41 is substantially equal to the diameter of the first guide portion 211. The clamping portion 42 is roughly in the shape of a waist sheet, and two sides of the clamping portion 42 along the length direction are mutually clamped with the valve seat 10; a certain flow gap is formed between the two sides of the clamping portion 42 in the width direction and the inner wall of the valve seat 10, so that the refrigerant can flow out of the valve cavity 11 through the flow gap.

It is understood that in other embodiments, the second guide portion 41 may be provided in other shapes, such as a triangular prism, as long as the function of abutting against the elastic member 22 is achieved; the catching portion 42 may have other shapes, for example, an oval shape, as long as the catching portion can catch the stopper 40 in the valve seat 10 and allow the refrigerant to pass therethrough.

In the present embodiment, the stopper 40 extends into the elastic member 22 and abuts against the valve body 21 through the elastic member 22; when the three components are accommodated in the valve cavity 11, the inner wall of the valve seat 10 at the end provided with the communication port 13 is bent inward, and the stop member 40 is clamped in the valve seat 10.

In one embodiment, the second guide portion 41 has a through hole 43 formed at a central position thereof. The flow port 43 penetrates the second guide portion 41 and the engaging portion 42 of the stopper 40, and is used for flowing a refrigerant. The circulation port 43 is a substantially circular cross-section through hole.

In one embodiment, in order to facilitate the adjustment of the refrigerant pressure at the periphery of the valve core 21, a pressure adjustment hole is further formed in the side wall of the first guide portion 211; the pressure regulating hole is used for relieving the pressure on the periphery of the valve core 21 so as to reduce the problem of valve core 21 movement caused by overlarge pressure of the refrigerant.

In the present embodiment, the pressure adjusting hole is formed as a circular through hole; it is understood that in other embodiments, the pressure adjusting hole may be provided with a hole with other shapes, such as a square hole, as long as the mounting cavity and the valve cavity 11 can be communicated and the pressure adjusting function is realized.

In one embodiment, it is considered that the refrigerant with impurities flows into the valve seat 10, and the movement of the valve element 21 in the valve chamber 11 is hindered or the throttle device 100 is damaged. To avoid this problem, a filter assembly 50 is disposed in the valve tube 30 adjacent to the inlet end 31; the filter assembly 50 is embedded in the valve tube 30 and serves to filter foreign substances in the air conditioning system.

It will be appreciated that the filter assembly 50 may be omitted if the effect of the impurities is not taken into account.

The operation principle of the throttling device 100 is specifically described as follows:

when the pressure of the refrigerant at the inlet end 31 is greater than that at the outlet end 32, the refrigerant overcomes the elastic force of the elastic member 22 and drives the abutting portion 2131 of the valve plug 21 to separate from the inner wall of the flared portion 15, so that the flow passage 141 is opened. The refrigerant enters the valve cavity 11 through the gap between the flow guide part 2132 and the adjusting part 2133 and the inner wall of the flow channel 141 and the gap between the flared part 15 and the abutting part 2131 and flows out through the flow through hole 43; when the pressure of the refrigerant at the inlet end 31 is less than or equal to the pressure at the outlet end 32, the valve element 21 is pressed by the elastic element 22, and the pressing portion 2131 presses against the inner wall of the flared portion 15 again, so that the flow passage 141 is closed.

When the throttling device 100 is in a closed state, one end of the elastic element 22 abuts against the end surface of the first guide part 211, and the other end abuts against the clamping part 42 of the stop part 40; when the throttling device 100 is slowly opened, the refrigerant pushes the abutting portion 2131 to move in a direction away from the valve port 12, and simultaneously drives the connecting portion 212 and the first guide portion 211 to move, at this time, the refrigerant overcomes the elastic force of the elastic member 22, so that the first guide portion 211 moves toward the second guide portion 41 until abutting against the end surface of the second guide portion 41; at this time, the spool 21 is at the maximum displacement away from the valve port 12, and the end surface of the flow guide 2132 of the spool 21 is flush with the end surface of the flow path 141 away from the flared portion 15.

At this time, the connecting portion 212 moves along the inner wall of the valve chamber 11 by the eight abutment bosses 2121; the eight abutment projections 2121 provide the valve element 21 with a radial supporting force with respect to the valve seat 10, so that the valve element 21 can stably move in the axial direction of the valve seat 10.

The utility model provides a throttling arrangement 100 is through setting up the protruding 2121 of butt on case 21 to reduce the area of contact between case 21 and the disk seat 10, and then can make case 21 slide in disk seat 10 steadily, thereby avoid taking place the card of case subassembly 20 and pause or the dead phenomenon of card, and make throttling arrangement 100 can open better or be closed.

The present invention further provides an air conditioning system (not shown), which includes the above-mentioned throttling device 100.

Of course, the air conditioning system further includes a condenser, an evaporator, and a compressor connected to the throttling device 100 to assist in completing the heat exchange process of the air conditioning system.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The throttling device is characterized by comprising a valve seat (10) and a columnar valve core (21), wherein the valve seat (10) is provided with a valve cavity (11) and a valve port (12) communicated with the valve cavity (11);

the valve core (21) is arranged in the valve cavity (11) and can axially slide relative to the valve cavity (11); the end part of the valve core (21) penetrates through the valve port (12) and is used for controlling the flow passing through the valve port (12), and a plurality of abutting protrusions (2121) which are contacted with the inner wall of the valve cavity (11) are respectively arranged on the outer wall of the valve core (21) along the axial direction and the circumferential direction.

2. A throttle device according to claim 1, characterized in that the throttle device further comprises an elastic member (22), one end of the valve core (21) faces the valve port (12), and the other end abuts against the valve seat (10) through the elastic member (22); the valve core (21) is coaxially arranged with the valve seat (10) through the abutting convex part.

3. A throttle device according to claim 2, characterized in that the valve core (21) comprises at least one section of connecting part (212), one end of the connecting part (212) abuts against the elastic member (22), and the other end faces the valve port (12);

the connecting part (212) is a quadrangular prism, transition chamfers are arranged on four side edges of the quadrangular prism, and the four chamfers are correspondingly and convexly arranged on the abutting protrusions (2121) respectively.

4. A throttle device according to claim 3 characterized in that the connecting portion (212) is provided with two rows of the abutment protrusions (2121) at different heights along the axis of the spool (21), the number of the abutment protrusions (2121) in each row being at least two and being arranged along the circumferential direction of the spool (21).

5. A throttle device according to claim 3, characterized in that the spool (21) further comprises a valve needle portion (213) connected to the connecting portion (212) at an end facing the valve port (12), and the maximum distance that the spool (21) can move in the valve chamber (11) is smaller than the length of the valve needle portion (213).

6. A throttle device according to claim 2, characterized in that it further comprises a stop member (40) embedded in the valve seat (10), one end of the elastic member (22) abuts against the valve core (21) and the other end abuts against the stop member (40); the valve core (21) is connected with the stop piece (40) through the elastic piece (22), and when the valve core (21) opens the valve port (12) to the maximum degree, one end of the valve core (21) is abutted against the stop piece (40).

7. A throttling device according to claim 6, characterized in that when the valve spool (21) closes the valve port (12), a moving clearance is provided between the valve spool (21) and the stop (40).

8. A flow restriction device according to claim 6, wherein a flow gap is provided between the stop (40) and the inner wall of the valve seat (10).

9. A flow restriction device according to any of claims 1-8, further comprising a valve tube (30) and a filter assembly (50), wherein the valve tube (30) has an inlet end (31) and an outlet end (32), and the valve seat (10) is mounted in the valve tube (30); the filter assembly (50) is disposed at the inlet end (31) of the valve tube (30).

10. An air conditioning system, characterized in that it comprises a throttling device according to any one of claims 1 to 9.

Images