CN113623902B - Throttling device and air conditioning system - Google Patents
Throttling device and air conditioning system Download PDFInfo
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- CN113623902B CN113623902B CN202010385809.6A CN202010385809A CN113623902B CN 113623902 B CN113623902 B CN 113623902B CN 202010385809 A CN202010385809 A CN 202010385809A CN 113623902 B CN113623902 B CN 113623902B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to a throttling device and an air conditioning system. The throttling device comprises a valve seat and a valve core assembly, wherein the valve seat is provided with a valve cavity and a valve port communicated with the valve cavity; the valve core assembly comprises a valve core and an elastic piece, the valve core is arranged in the valve cavity, one end of the valve core penetrates through the valve port, and the other end of the valve core is propped against the valve seat through the elastic piece; the valve core can slide relative to the valve port and reset under the action of the elastic piece; the valve core outer wall is provided with at least two abutting projections, and the valve core is contacted with the inner wall of the valve cavity through at least two abutting projections. According to the throttling device, the abutting bulge is arranged on the valve core, so that the contact area between the valve core and the valve seat is reduced, the valve core can stably slide in the valve seat, the phenomenon of blocking or dead blocking of the valve core is avoided, and the throttling device can be opened or closed better.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to a throttling device and an 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 refrigerant flow 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 block or even dead when moving in the valve seat.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an improved air conditioning system and a throttle device. According to the throttling device, the abutting bulge is arranged on the valve core, so that the contact area between the valve core and the valve seat is reduced, the valve core can stably slide in the valve seat, the phenomenon of blocking or dead blocking of the valve core is avoided, and the throttling device can be opened or closed better.
The throttling device comprises a valve seat and a valve core assembly, wherein a valve cavity and a valve port communicated with the valve cavity are formed in the valve seat;
the valve core assembly comprises a valve core and an elastic piece, the valve core is arranged in the valve cavity, one end of the valve core penetrates through the valve port, and the other end of the valve core is propped against the valve seat through the elastic piece; the valve core can slide relative to the valve port and reset under the action of the elastic piece; the valve core outer wall is provided with at least two abutting projections, and the valve core is contacted with the inner wall of the valve cavity through at least two abutting projections.
Further, the valve core comprises at least one section of connecting part, one end of the connecting part is abutted against the elastic piece, and the other end of the connecting part faces the valve port; the valve core is coaxially arranged with the valve seat through at least two abutting convex parts; and/or the number of the groups of groups,
the abutting protrusion is an arc-shaped protrusion.
Further, the connecting portion is arranged to be a triangular prism, and the connecting portions of the side faces of the triangular prism are respectively provided with a transitional chamfer, and the three chamfers are respectively correspondingly provided with the abutting protrusions in a protruding mode.
Further, the connecting portion is provided with a plurality of rows of the abutting projections at different heights of the spool axis, and each row of the abutting projections is at least two in number and is arranged along the circumferential direction of the spool.
Further, one end of the valve core, which is relatively far away from the valve port, is provided with a mounting cavity, the throttling device further comprises a stop piece embedded in the valve seat, and the stop piece is partially inserted in the mounting cavity; the elastic piece is sleeved at the joint of the valve core and the stop piece, one end of the elastic piece is connected with the valve core, and the other end of the elastic piece is propped against the stop piece.
Further, the valve core is further provided with a pressure adjusting hole, and when the stop piece is inserted into the mounting cavity, the mounting cavity is communicated with the valve cavity through the pressure adjusting hole.
Further, the stop piece comprises a stop part and a plug-in part formed by extending along the radial direction of the stop part, and the plug-in part extends into the mounting cavity; the valve core can move under the guide of the inserting part and is abutted against the end face of the stop part.
Further, the length of the plug-in connection part is smaller than or equal to the length of the installation cavity.
Further, the throttling device further comprises a stop block embedded in the valve seat, the valve core is sleeved on the stop block, one end of the stop block abuts against the elastic piece, the other end abuts against the inner wall of the valve seat, and the valve core abuts against the valve seat through the elastic piece and the stop block.
Further, the throttling device also comprises a valve pipe and a filtering assembly, wherein 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 an inlet end of the valve tube.
The invention also provides an air conditioning system comprising a throttling device according to any of the above.
The invention provides a throttling device, which is characterized in that a contact protrusion is arranged on a valve core to reduce the contact area between the valve core and a valve seat, so that the valve core can stably slide in the valve seat, the phenomenon of clamping or blocking of the valve core is avoided, and the throttling device can be opened or closed better.
Drawings
FIG. 1 is a schematic illustration showing a throttle device in an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of a valve seat in the throttle apparatus shown in FIG. 1;
FIG. 3 is a schematic view of a valve element in the throttle apparatus shown in FIG. 1;
FIG. 4 is a schematic cross-sectional view of the throttle device of FIG. 1 in an assembled closed state;
FIG. 5 is a schematic cross-sectional view of the throttle device of FIG. 4 in an assembled open state;
FIG. 6 is an enlarged schematic view of the throttle device shown in FIG. 5 at A;
FIG. 7 is a schematic view of a stop block of the throttle device shown in FIG. 1;
FIG. 8 is a schematic view of a stopper of a throttle device according to another embodiment of the present invention;
FIG. 9 is a schematic structural view of a valve element of a throttle device according to another embodiment of the present invention;
FIG. 10 is a schematic view illustrating a throttle device according to another embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of the throttle device of FIG. 10 after assembly.
Description of element reference numerals
100. 100a, a throttling device; 10. a valve seat; 11. a valve cavity; 12. a valve port; 13. a communication port; 14. a mounting part; 141. a flow channel; 15. a flared portion; 20. a valve core assembly; 21. 21a, a valve core; 211. a first guide part; 212. 212a, a second guide part; 213. a connection part; 2131. the abutting bulge; 214. a valve needle portion; 2141. a holding portion; 2142. a flow guiding part; 2143. an adjusting section; 215. a mounting cavity; 216. a pressure regulating hole; 22. an elastic member; 30. a valve tube; 31. an inlet end; 32. an outlet end; 40. a stop block; 41. a guide hole; 42. a flow port; 40a, a stopper; 41a, a plug-in part; 42a, a third guide portion; 43a, a clamping part; 50. and a filter assembly.
The foregoing general description of the invention will be described in further detail with reference to the drawings and detailed description.
Detailed Description
The present invention will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.
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. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
The present invention provides a throttle device 100, 100a connected between a condenser and an evaporator in an air conditioning system for throttling and reducing pressure.
Of course, the throttle device 100, 100a may also be applied to other systems, such as a refrigeration system of a refrigerator, etc.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an exploded view of a throttle device 100 according to an embodiment of the invention.
The throttle device 100 includes a valve seat 10 and a valve element assembly 20, and the valve element assembly 20 is disposed in the valve seat 10 and is capable of controlling opening or closing of the valve seat 10. The valve seat 10 is configured to house a valve element assembly 20, the valve element assembly 20 being movable within the valve seat 10 and configured to control opening and closing of the valve seat 10. When the refrigerant pressures 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 through the pressure difference, so that the valve seat 10 is opened.
In one embodiment, the restriction device 100 further comprises a valve tube 30. The valve seat 10 and the valve core assembly 20 are mounted on a valve tube 30, and both ends of the valve tube 30 are connected to a condenser and an evaporator, respectively, through pipelines. 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 being connected with an external pipeline. The valve seat 10 and the valve core assembly 20 arranged in the valve pipe 30 can be replaced integrally when a problem occurs, so that the corresponding replacement process is simplified.
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 directly extended and used to connect with an external line.
Referring to FIG. 2, FIG. 2 is a schematic cross-sectional view of the valve seat 10 of the throttling device 100 of FIG. 1.
The valve seat 10 is approximately 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 arranged on one side of the valve seat 10 relatively close to the outlet end 32; the valve ports 12 and the communication ports 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 tube 30 and is matched with the valve core assembly 20 to enable the refrigerant to flow into the valve cavity 11; the communication port 13 is used for leading the refrigerant to flow out of the valve cavity 11; the valve chamber 11 is used for accommodating the valve core assembly 20 and for axially moving the valve core assembly 20 in the valve chamber 11.
In one embodiment, the outer periphery of the valve seat 10 is provided with a positioning groove (not numbered); the valve tube 30 is fitted into the positioning groove by caulking or the like, and the valve seat 10 is fixed in the valve tube 30. This arrangement allows the valve seat 10 to be installed at a low cost and to be operated easily.
In one embodiment, the end of the valve seat 10 where the valve port 12 is formed is radially contracted to form a mounting portion 14, and the mounting portion 14 is adapted to abut against the valve element assembly 20. The mounting portion 14 is arranged such that an equi-radially extending flow passage 141 is formed between the valve port 12 and the valve chamber 11. The flow passage 141 extends radially 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 flaring portion 15 is used for being partially abutted against the valve core assembly 20, so that the inner wall of the flaring portion 15 is in inclined plane fit with the valve core assembly 20.
It will be appreciated that in other embodiments, the flare 15 may not be provided or configured in other constant or reduced diameter configurations, so long as it is capable of engaging the valve core assembly 20 and controlling the opening or closing of the flow passage 141.
Referring to fig. 3 to 6, fig. 3 is a schematic structural diagram of the valve core 21 in the throttle device 100 shown in fig. 1; FIG. 4 is a schematic cross-sectional view of the throttle device 100 of FIG. 1 in an assembled closed state; FIG. 5 is a schematic cross-sectional view of the throttle device 100 of FIG. 4 in an assembled open state; fig. 6 is an enlarged schematic view of the throttle device 100 shown in fig. 5 at a.
The valve core assembly 20 comprises a valve core 21 and an elastic piece 22, wherein one end of the valve core 21 penetrates through the expansion part 15 and stretches into the flow channel 141, and the other end penetrates through the elastic piece 22 and abuts against the elastic piece 22; the valve core 21 abuts against the inner wall of the flare 15 by the elastic force of the elastic member 22. The valve core 21 is used for being matched with the flaring part 15 and controlling the opening or closing of the flow channel 141; the elastic member 22 is used for providing corresponding elastic force for the valve core 21, so that the valve core 21 abuts against the inner wall of the flaring portion 15.
The valve element 21 has a substantially columnar shape. The valve element 21 includes a first guide portion 211, a second guide portion 212, a connecting portion 213, and a needle portion 214, which are disposed in this order. The diameters of the first guide portion 211, the second guide portion 212, and the connection portion 213 are sequentially increased; the valve needle portion 214 has a smaller diameter than the connecting portion 213 and is capable of partially extending into the flared portion 15 and sealing the flow passage 141. The first guide part 211 is used for penetrating the valve seat 10 and guiding the movement of the valve core 21 in the valve seat 10; the second guiding portion 212 is used for the elastic member 22 to penetrate and guide the elastic member 22 to move axially; the connecting part 213 is used for propping 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 213 and the second guiding part 212 is used for propping against the elastic piece 22, so that the elastic piece 22 can be stably propped against the valve core 21 and provide elastic force for the valve core 21; the valve needle portion 214 is adapted to co-operate with the flared portion 15 and is capable of closing the flow passage 141.
It will be appreciated that in other embodiments, the valve spool 21 may be provided in other shapes, such as spherical, so long as movement within the valve seat 10 is enabled and the flow passage 141 is engaged and blocked.
In one embodiment, the first guide portion 211 and the second guide portion 212 are each of a columnar structure having an equal diameter. One end of the first guide part 211 extends out of the valve seat 10, and the other end is fixedly connected to the second guide part 212; the first guide 211 engages with the valve seat 10 and guides the movement of the valve spool 21 in the valve chamber 11. One end of the second guide portion 212 is connected to the first guide portion 211, and the other end is fixedly connected to the connecting portion 213; the diameter of the second guide portion 212 is adapted to the size of the elastic member 22, and the elastic member 22 can be moved in the axial direction, and thus the movement of the valve element 21 away from the axial direction of the valve seat 10 due to the bending of the elastic member 22 itself can be effectively prevented.
The conventional 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 dead when moving in the valve seat 10. In order to avoid the occurrence of the above phenomenon, the outer periphery of the connecting portion 213 is provided with at least two abutment protrusions 2131, and the valve core contacts the valve seat 10 through the abutment protrusions 2131, so as to reduce the contact area between the valve core and the valve seat 10, so that the valve core can slide in the valve seat 10 along the axial direction smoothly, and the occurrence of the phenomenon that the valve core is stuck or blocked in the valve seat 10 is reduced.
In one embodiment, the connecting portion 213 has a substantially triangular prism shape, and the connecting portion 213 is provided between the second guide portion 212 and the needle portion 214. The three connection portions of the three sides of the connection portion 213 are respectively provided with the above-described abutment projections 2131; the abutment protrusion 2131 protrudes toward the valve seat 10. The abutment protrusion 2131 is for abutting the valve element 21 to the valve seat 10.
It will be appreciated that in other embodiments, the connecting portion 213 may be configured in other structures, for example, a columnar shape with a kidney-shaped cross section, so long as a certain space between the connecting portion and the inner wall of the valve chamber 11 is achieved, and the abutment protrusion 2131 may be provided correspondingly.
In one embodiment, the connection parts of the three sides of the connection part 213 are respectively provided with transition chamfers, and the three chamfers are respectively provided with the abutting protrusions 2131 correspondingly; the three abutment projections 2131 are identical in size and are provided at the same height from the end position of the spool 21. By doing so, it is possible to provide the valve element 21 with a radial holding force and to provide the valve element 21 coaxially with the valve seat 10.
It is understood that, if the abutment protrusion 2131 is provided outside the irregularly shaped connection portion 213, the dimensions of the abutment protrusion 2131 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 2131.
In one embodiment, the connecting portion 213 is provided with a plurality of rows of abutment projections 2131 at different heights of the axis of the spool 21, with at least two abutment projections 2131 per row being provided in the circumferential direction of the spool 21, in view of the stability of the spool 21 moving within the valve chamber 11.
Specifically, two abutment projections 2131 may be provided at each of the chamfers described above, so that two rows of abutment projections 2131 are formed.
It will be appreciated that in other embodiments, three or more abutment projections 2131 are provided for each chamfer in the axial direction, so long as the valve element 21 is connected to the valve seat 10 by the abutment projections 2131 and is movable in the axial direction.
In one embodiment, the abutment protrusion 2131 is an arc-shaped protrusion such that the abutment protrusion 2131 contacts the inner wall of the valve chamber 11 through an arc-shaped apex. By 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 the valve core 21 being blocked is reduced.
In one embodiment, the valve needle 214 includes a supporting portion 2141, one end of the supporting portion 2141 is fixedly connected to the connecting portion 213, and the other end abuts against the flaring portion 15. The abutting portion 2141 is for abutting against the inner wall of the flare portion 15 and is capable of sealing the flow passage 141.
Specifically, the outer peripheral surface of the supporting portion 2141 is a conical surface, and the taper of the supporting portion 2141 is matched with the taper of the flaring portion 15; the two cooperate with each other and are capable of blocking the flow passage 141. The outer peripheral surface of the abutting portion 2141 is fitted with the inner wall of the flare portion 15 by a slope so that the flow passage 141 is sealed.
It is understood that in other embodiments, the taper of the abutting portion 2141 and the taper of the flared portion 15 may not be matched with each other, so as to enable the abutting portion 2141 to abut against the inner wall of the flared portion 15 and block the flow channel 141.
In one embodiment, the width of the outer peripheral surface of the abutting portion 2141 is greater than the width of the inner wall of the flared portion 15, and the maximum outer diameter of the abutting portion 2141 is greater than the maximum inner diameter of the flared portion 15. This arrangement enables the abutting portion 2141 to be stably abutted against the inner wall of the flare portion 15.
It is to be understood that, in other embodiments, the abutting portion 2141 may be configured as a cylindrical structure with equal diameter as long as the abutting against the inner wall of the flared portion 15 and the flow channel 141 can be blocked.
In one embodiment, the end of the supporting portion 2141 is further provided with a guiding portion 2142. The flow guide 2142 has a substantially columnar shape and has an outer diameter smaller than an inner diameter of the flow passage 141. One end of the flow guiding part 2142 is connected with the supporting part 2141, and the other end can extend into the flow channel 141, so that a gap is formed between the outer wall of the flow guiding part 2142 and the inner wall of the flow channel 141; the gap is used for the flow of the refrigerant. The flow guiding portion 2142 is used for guiding the refrigerant into the valve cavity 11 along its outer wall.
It is understood that in other embodiments, the flow guiding portion 2142 may be provided in other shapes, such as a needle shape or a frustum, as long as the refrigerant can be drained.
In one embodiment, the supporting portion 2141 is further provided with an adjusting portion 2143 between the guiding portions 2142; the outer periphery of the adjusting portion 2143 is provided as a tapered surface; the outer diameter of one end of the adjusting portion 2143 connected to the supporting portion 2141 is larger than the outer diameter of one end of the adjusting portion 2143 connected to the guiding portion 2142. The taper range of the adjusting part 2143 can be set correspondingly according to the area of the flow required actually; or a regulating part with different sizes is selected as the valve core 21 to be applied to the throttling device 100. The diversion portion 2142 and a part of the adjustment portion 2143 extend out of the flow channel 141 in the valve-closed state.
When the pressure of the refrigerant at the inlet end 31 is greater than that of the refrigerant at the outlet end 32, the refrigerant overcomes the elasticity of the elastic member 22 and drives the abutting portion 2141 of the valve core 21 to be separated from the inner wall of the flaring portion 15, so that the flow channel 141 is opened; when the pressure of the refrigerant at the inlet end 31 is less than or equal to that at the outlet end 32, the valve core 21 is pressed against the inner wall of the flaring portion 15 again by the elastic member 22, so that the flow channel 141 is closed.
In one embodiment, the maximum movement distance provided by the first guiding portion 211 for the valve core 21 is equal to the length of the flow guiding portion 2142 and the adjusting portion 2143 of the valve core 21 extending out of the flow channel, so that the end surface of the flow guiding portion 2142 of the valve core 21 is flush with the end surface of the flow channel 141 away from the expansion portion 15 in the valve-open state, as shown in fig. 4 and 5. By this arrangement, the valve core 21 can stably move in the valve seat 10, and the diversion portion 2142 of the valve core 21 is prevented from falling out of the flow channel 141 under the impact of the refrigerant, so that the valve core 21 is blocked in the valve seat 10.
In one embodiment, as shown in fig. 6, 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 of the refrigerant at the two positions of the inlet end 31 and the outlet end 32 overcomes the elasticity of the elastic member 22, so that the valve core 21 can move along the axial direction towards the communication port 13 and correspondingly open the flow channel 141. By doing so, the valve body 21 can be made to open or close the flow passage 141 by the elastic member 22 without being separately connected to a power source.
It will be appreciated that in other embodiments, the resilient member 22 may also be provided as a tension spring or other resilient element; one end of the tension spring is fixed to the connecting portion 213 and the other end is fixed to the mounting portion 14, as long as the elastic force of the valve body 21 to the position closing the flow passage 141 can be provided.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a structure of a stopper 40 in the throttling device 100 shown in fig. 1.
In one embodiment, the throttle device 100 further includes a stop 40. The stopper 40 is substantially disc-shaped and fixedly installed at one end of the valve seat 10 away from the valve port 12, i.e., at one end of the valve seat 10 provided with the communication port 13. The stopper 40 has a guide hole 41 at a center thereof, and the guide hole 41 is configured to pass through the first guide portion 211.
In order to enable the refrigerant to pass through the stop block 40, the stop block 40 is also correspondingly provided with a circulation port 42, and the circulation port 42 is used for communicating the valve cavity 11 with the pipe cavity of the valve pipe 30.
It will be appreciated that in other embodiments, the shape of the stop 40 may be configured accordingly to the shape of the actual cross-section of the valve chamber 11, as long as threading of the first guide 211 is enabled.
In one embodiment, the inner wall of the valve seat 10 is correspondingly provided with a fixing groove (not numbered); one side inner wall of the fixing groove is abutted against the stop block 40, and the adjacent inner wall is bent inwards to fix the stop block 40 in the valve seat 10.
Referring to fig. 8 to 11 together, fig. 8 is a schematic structural view of a stopper 40a of a throttling device 100a according to another embodiment of the invention; fig. 9 is a schematic structural view of a valve element 21a of a throttle device 100a according to another embodiment of the present invention; FIG. 10 is a schematic diagram illustrating a throttle device 100a according to another embodiment of the present invention; fig. 11 is a schematic sectional view of the assembled throttle device 100a shown in fig. 10.
In one embodiment, the throttle device 100a further includes a stopper 40a instead of the stopper 40 described above. The stopper 40a is a substantially rod-shaped member, and the stopper 40a is fixed to an end of the valve seat 10 remote from the valve port 12 and is disposed coaxially with the valve seat 10. The stopper 40a includes a plug portion 41a, a third guide portion 42a, and a locking portion 43a, which are fixedly connected in order. The plug-in part 41a is used for extending the stop piece 40a into the valve core 21a and guiding the movement direction of the valve core 21 a; the third guiding portion 42a is used for penetrating the elastic member 22 and guiding the expansion and contraction of the elastic member 22; the engagement portion 43a is used to fix the stopper 40a in the valve seat 10. By the arrangement, the integral installation of the valve core 21a, the elastic piece 22 and the stop piece 40a is more convenient and simple.
It will be appreciated that in other embodiments, the third guiding portion 42a may be omitted, and the elastic member 22 may be directly sleeved on the second guiding portion 212a, with one end abutting against the connecting portion 213, and the other end abutting against the clamping portion of the stopper.
Specifically, the insertion portion 41a and the third guiding portion 42a are both cylindrical, and the diameter of the insertion portion 41a is smaller than that of the third guiding portion 42 a; the diameter of the third guide portion 42a is adapted to the diameter of the elastic member 22, and the third guide portion 42a can extend into the elastic member 22. The engaging portion 43a is substantially in the shape of a waist, and both sides of the engaging portion 43a in the longitudinal direction are engaged with the valve seat 10; the engaging portion 43a has a certain flow gap between both sides in the width direction and the inner wall of the valve seat 10 so that the refrigerant can flow out of the valve chamber 11 through the flow gap.
It is understood that in other embodiments, the insertion portion 41a and/or the third guiding portion 42a may be provided in other shapes, such as a triangular prism, so long as the corresponding valve element 21a or the elastic member 22 can be inserted and the guiding function can be achieved; the engagement portion 43a may be provided in another shape, for example, an elliptical shape, as long as the stopper 40a can be engaged with the valve seat 10 and the refrigerant can pass therethrough.
In the present embodiment, the diameter of the second guide portion 212 of the valve body 21a becomes large, and the end surface of the second guide portion 212 is used to abut against the elastic member 22; meanwhile, the valve body 21a is replaced by the third guide portion 42a of the stopper 40a without providing the first guide portion 211. In order to facilitate the insertion of the insertion portion 41a of the stopper 40a, an installation cavity 215 is formed at one end of the second guide portion 212 facing the stopper 40 a; the mounting cavity 215 is used for accommodating the plugging portion 41a.
It will be appreciated that in other embodiments, the diameter of the second guiding portion 212 may not be changed, and the elastic member 22 may be directly abutted against the connecting portion 213.
In one embodiment, the depth of the mounting cavity 215 is slightly greater than the length of the plug portion 41 a; when the second guide portion 212 abuts against the third guide portion 42a, the spool 21a is at the maximum displacement away from the valve port 12. The arrangement is such that the valve element 21a can move relative to the valve port 12 under the guidance of the insertion portion 41a.
Of course, the depth of the installation cavity 215 may be less than or equal to the length of the plug portion 41a, and at this time, when the bottom wall of the installation cavity 215 abuts against the end surface of the plug portion 41a, the valve element 21a is at the maximum displacement away from the valve port 12.
In the present embodiment, the stopper 40a extends into the elastic member 22 and abuts against the valve element 21a via the elastic member 22; when the three are accommodated in the valve cavity 11, the inner wall of the end of the valve seat 10 with the communication port 13 is bent inwards, and the stop piece 40a is clamped in the valve seat 10. When the throttle device 100a is in a closed state, one end of the elastic member 22 abuts against the end surface of the second guiding portion 212, and the other end is connected with the clamping portion 43a of the stop member 40 a; when the throttling device 100a is slowly opened, the refrigerant pushes the abutting portion 2141 to move towards a direction away from the valve port 12, and drives the connecting portion 213 and the second guiding portion 212 to move at the same time, at this time, the refrigerant overcomes the elastic force of the elastic member 22, so that the second guiding portion 212 moves towards the third guiding portion 42a under the guidance of the inserting portion 41a until abutting against the end face of the third guiding portion 42 a; at this time, the valve element 21a is at the maximum displacement away from the valve port 12, and the end surface of the flow guiding portion 2142 of the valve element 21a is flush with the end surface of the flow channel 141 away from the diverging portion 15.
In one embodiment, in order to facilitate adjustment of the refrigerant pressure on the outer periphery of the valve core 21a, the side wall of the second guide portion 212 is further provided with a pressure adjustment hole 216; the pressure adjusting hole 216 is used for relieving the pressure of the outer periphery of the valve core 21a so as to reduce the problem of the valve core 21a moving when the refrigerant pressure is too high.
In this embodiment, the pressure adjusting hole 216 is formed as a circular through hole; it will be appreciated that in other embodiments, the pressure regulating hole 216 may be provided with other shaped holes, such as square holes, so long as the mounting cavity 215 and the valve cavity 11 are in communication and perform the function of pressure regulation.
In one embodiment, it is considered that the refrigerant with impurities flows into the valve seat 10, and thus the movement of the valve bodies 21, 21a in the valve chamber 11 is blocked or the throttle devices 100, 100a are damaged. To avoid the above problems, a filter assembly 50 is provided in the valve tube 30 near the inlet end 31; the filter assembly 50 is embedded in the valve tube 30 and serves to filter impurities in the air conditioning system.
It will be appreciated that the filter assembly 50 may be omitted if the effect of impurities is not considered.
The following specifically describes the operation principle of the throttle device 100 by taking it as an example:
when the pressure of the refrigerant at the inlet end 31 is greater than that of the refrigerant at the outlet end 32, the refrigerant overcomes the elastic force of the elastic member 22 and drives the abutting portion 2141 of the valve core 21 to separate from the inner wall of the flaring portion 15, so that the flow channel 141 is opened. The refrigerant enters the valve cavity 11 through the gap between the guide part 2142 and the inner wall of the flow channel 141 and the gap between the flaring part 15 and the supporting part 2141, and flows out through the flow port 42; when the pressure of the refrigerant at the inlet end 31 is less than or equal to that at the outlet end 32, the valve core 21 is pressed against the inner wall of the flaring portion 15 again by the elastic member 22, so that the flow channel 141 is closed.
During the opening process of the throttling device 100, the refrigerant pushes the supporting part 2141 and drives the connecting part 213 and the second guiding part 212 to move along the axis of the valve seat 10; at this time, the connecting portion 213 moves along the inner wall of the valve chamber 11 by the three abutment projections 2131; the three abutment projections 2131 provide radial support force to the valve spool 21 with respect to the valve seat 10 so that the valve spool 21 can move stably in the axial direction of the valve seat 10.
The invention provides a throttling device, which is characterized in that a contact protrusion is arranged on a valve core to reduce the contact area between the valve core and a valve seat, so that the valve core can stably slide in the valve seat, the phenomenon of clamping or blocking of the valve core is avoided, and the throttling device can be opened or closed better.
The working principle of the throttling device 100a may be correspondingly deduced, and will not be described herein.
The invention also provides an air conditioning system (not shown) comprising the throttling device.
Of course, the air conditioning system further includes a condenser, an evaporator, a compressor, and the like connected to the throttling device 100, so as to assist in completing the heat exchange process of the air conditioning system.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The throttling device is characterized by comprising a valve seat (10) and a valve core assembly (20), 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 assembly (20) comprises a valve core and an elastic piece (22), the valve core is arranged in the valve cavity (11), one end of the valve core penetrates through the valve port (12), and the other end of the valve core is propped against the valve seat (10) through the elastic piece (22); the valve core (21, 21 a) can slide relative to the valve port (12) and reset under the action of the elastic piece (22); the valve is characterized in that at least two abutting bulges (2131) are arranged on the outer walls of the valve cores (21, 21 a), the valve cores (21, 21 a) are in contact with the inner wall of the valve cavity (11) through at least two abutting bulges (2131), an installation cavity (215) is formed in one end, which is relatively far away from the valve port (12), of the valve core (21 a), the throttling device further comprises a stop piece (40 a) embedded in the valve seat (10), and the stop piece (40 a) is partially inserted into the installation cavity (215).
2. The throttle device according to claim 1, characterized in that the spool (21, 21 a) comprises at least one segment of connecting portion (213), one end of the connecting portion (213) being abutted against the elastic member (22), the other end being directed towards the valve port (12); at least two abutting projections (2131) are arranged on the connecting part (213), and the valve cores (21, 21 a) are coaxially arranged with the valve seat (10) through the at least two abutting projections (2131); and/or the number of the groups of groups,
the abutting protrusion (2131) is an arc-shaped protrusion.
3. The throttling device according to claim 2, characterized in that the connecting portion (213) is provided as a triangular prism, and the connecting portions of the side faces of the triangular prism are respectively provided with a transitional chamfer, and the three chamfers are respectively provided with the abutting projections (2131) in a corresponding protruding manner.
4. The throttle device according to claim 2, characterized in that the connecting portion (213) is provided with a plurality of rows of the abutment projections (2131) at different heights of the axis of the spool (21, 21 a), the number of the abutment projections (2131) of each row being at least two and being arranged in the circumferential direction of the spool (21, 21 a).
5. The throttling device according to claim 1, characterized in that the elastic member (22) is sleeved at the joint of the valve core (21 a) and the stop member (40 a), and one end of the elastic member (22) is connected to the valve core (21 a), and the other end is abutted against the stop member (40 a).
6. The throttle device according to claim 5, characterized in that the valve core (21 a) is further provided with a pressure regulating hole (216), and that the mounting cavity (215) communicates with the valve cavity (11) through the pressure regulating hole (216) when the stopper (40 a) is inserted into the mounting cavity (215).
7. The throttle device according to claim 5, characterized in that the stop (40 a) comprises a stop portion and a plug portion (41 a) extending radially along the stop portion, the plug portion (41 a) extending into the mounting cavity (215); the valve element (21 a) can move under the guide of the insertion part (41 a) and is abutted against the end surface of the stop part.
8. A throttle device according to claim 7, characterized in that the length of the plug-in part (41 a) is smaller than or equal to the length of the mounting cavity (215).
9. The throttling arrangement according to any of the claims 1-8, characterized in that the throttling arrangement further comprises a valve tube (30) and a filter assembly (50), said valve tube (30) being provided with an inlet end (31) and an outlet end (32), said valve seat (10) being mounted in said valve tube (30); the filter assembly (50) is disposed at an inlet end (31) of the valve tube (30).
10. An air conditioning system, characterized in that it comprises a throttle device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010385809.6A CN113623902B (en) | 2020-05-09 | 2020-05-09 | Throttling device and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010385809.6A CN113623902B (en) | 2020-05-09 | 2020-05-09 | Throttling device and air conditioning system |
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| Publication Number | Publication Date |
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| CN113623902A CN113623902A (en) | 2021-11-09 |
| CN113623902B true CN113623902B (en) | 2023-09-05 |
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| CN202010385809.6A Active CN113623902B (en) | 2020-05-09 | 2020-05-09 | Throttling device and air conditioning system |
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| JP6231509B2 (en) * | 2015-02-02 | 2017-11-15 | 株式会社鷺宮製作所 | Throttle device and refrigeration cycle |
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| CN102644785A (en) * | 2011-02-17 | 2012-08-22 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN202360769U (en) * | 2011-11-10 | 2012-08-01 | 上海齐耀动力技术有限公司 | Stop valve with corrugated tube torsion preventive structure |
| JP2016095049A (en) * | 2014-11-12 | 2016-05-26 | 株式会社鷺宮製作所 | Throttle device, and refrigeration cycle system including the same |
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| CN113623902A (en) | 2021-11-09 |
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