CN112212020A - Pneumatic adjustable throttle valve, refrigerating system and air conditioner - Google Patents
Pneumatic adjustable throttle valve, refrigerating system and air conditioner Download PDFInfo
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- CN112212020A CN112212020A CN202010930276.5A CN202010930276A CN112212020A CN 112212020 A CN112212020 A CN 112212020A CN 202010930276 A CN202010930276 A CN 202010930276A CN 112212020 A CN112212020 A CN 112212020A
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- 239000003507 refrigerant Substances 0.000 claims abstract description 100
- 238000004891 communication Methods 0.000 claims description 27
- 238000005070 sampling Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a pneumatic adjustable throttle valve, a refrigeration system and an air conditioner, wherein the throttle valve comprises a valve body, the valve body is provided with a cavity, a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are both communicated with the cavity; a spool movably disposed within the valve body, the spool having a throttling passage, the spool having a throttling position and a normal flow position; at the throttling position, the valve core is positioned at the refrigerant inlet position, the inlet of the throttling channel is communicated with the refrigerant inlet, and the outlet of the throttling channel is communicated with the refrigerant outlet; in the normal circulation position, the valve core avoids the refrigerant inlet and the refrigerant outlet, the refrigerant inlet is directly communicated with the refrigerant outlet through the cavity, and the valve core is switched between the throttling position and the normal position through movement. The throttle valve can simplify the pipeline structure and improve the reliability.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a pneumatic adjustable throttle valve, a refrigeration system and an air conditioner.
Background
In refrigeration systems, it is desirable to install a simple control valve on some system lines due to energy saving requirements, increased functions, performance requirements, etc., such as throttling the valve to reduce pressure in the first operating mode and achieving ultra-low resistance flow in the second operating mode.
Common throttling and pressure reducing valves are electronic expansion valves, thermal expansion valves and the like, when the opening of the valves is the largest, the throttling and pressure reducing functions of the valves are still large, namely the flow resistance is very large, and ultra-low resistance flow cannot be realized, so that the technical design requirements cannot be met. The electromagnetic valve can realize the pipeline circulation with lower resistance but can not realize the functions of throttling and pressure reduction. If the electronic expansion valve and the electromagnetic valve are used in parallel, the effects of throttling and pressure reducing or low-resistance circulation can be realized through different opening combination modes, but the design of the controller is more complicated, and the reliability is reduced.
Disclosure of Invention
The invention discloses a pneumatic adjustable throttle valve, a refrigeration system and an air conditioner, and solves the problem that the existing throttle valve cannot switch between throttling and low-resistance circulation.
According to an aspect of the present invention, there is disclosed a throttle valve comprising: the valve body is provided with a cavity, a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are communicated with the cavity; a spool movably disposed within the valve body, the spool having a throttling passage, the spool having a throttling position and a normal flow position; at the throttling position, the valve core is positioned at the refrigerant inlet position, the inlet of the throttling channel is communicated with the refrigerant inlet, and the outlet of the throttling channel is communicated with the refrigerant outlet; in the normal circulation position, the valve core avoids the refrigerant inlet and the refrigerant outlet, the refrigerant inlet is directly communicated with the refrigerant outlet through the cavity, and the valve core is switched between the throttling position and the normal position through movement.
Furthermore, the cavity is divided into an air pressure chamber and a communication chamber by the valve core, the air pressure chamber is communicated with the air source, and the communication chamber is communicated with the refrigerant outlet; and the valve core moves under the driving of the pressure difference between the air pressure chamber and the communication chamber.
Further, in the normal circulation position, the refrigerant inlet is directly communicated with the communication chamber.
Furthermore, the refrigerant inlet is positioned on the side wall of the valve body, the inlet of the throttling channel is positioned on the side wall of the valve core, and the inlet of the throttling channel corresponds to and is communicated with the refrigerant inlet at the throttling position.
Furthermore, a bulge is further arranged on the valve core and located in the communication chamber, an outlet of the throttling channel is located at the end of the bulge, and the throttling channel is communicated with the communication chamber.
Further, the throttle valve further comprises: the reset spring is elastically arranged in the communicating chamber, the reset spring is sleeved on the protrusion, one end of the reset spring is abutted against the inner wall of the valve body, the other end of the reset spring is abutted against the valve core, and the reset spring is used for resetting the valve core from the throttling position to the normal circulation position.
Further, the end of the protrusion points to the refrigerant outlet.
Further, the throttling channel forms a straight pipe channel at the part positioned on the bulge, and the axis of the straight pipe channel is parallel or collinear with the revolution axis of the bulge.
Further, the throttle valve further comprises: the valve body is provided with a throttling position, a communicating chamber and a valve core, the throttling position is used for throttling the valve core, the communicating chamber is communicated with the air pressure chamber, the valve core is communicated with the communicating chamber, the valve core is arranged in the throttling position, the communicating chamber is communicated with the air pressure chamber, the valve core is arranged in the communicating chamber, the valve core is arranged in the throttling position, and the communicating chamber is communicated with the communicating chamber.
Further, in a displacement direction in which the valve element is displaced to the throttle position, an area of a flow surface of the communication chamber is gradually reduced.
Furthermore, the valve body is also provided with a limiting part, and the valve core is in limiting fit with the limiting part at the throttling position.
Further, the limiting part is an annular bulge on the inner wall of the valve body.
Furthermore, a first guide portion is arranged on the inner wall of the valve body, a second guide portion corresponding to the first guide portion is arranged on the valve core, the first guide portion and the second guide portion are in sliding fit in the axial direction of the valve body, and meanwhile, the first guide portion and the second guide portion are in limiting fit in the circumferential direction of the valve body, so that the valve core can only move in the axial direction of the valve body.
Furthermore, a first guide portion is arranged on the inner wall of the valve body, a second guide portion corresponding to the first guide portion is arranged on the valve core, the first guide portion and the second guide portion are in sliding fit in the axial direction of the valve core, and meanwhile, the first guide portion and the second guide portion are in limiting fit in the circumferential direction of the valve core, so that the valve core can only move along the axial direction of the valve core.
Further, the first guide part is a guide rail or a guide groove, and the second guide part is a guide groove or a guide rail matched with the first guide part.
Further, the cross-section of the valve body is non-circular.
Further, the throttle valve further comprises: and the first end of the pressure tapping pipe is communicated with the air pressure chamber, and the second end of the pressure tapping pipe is communicated with an air source.
According to another aspect of the invention, a heat exchange system is disclosed, comprising the throttling valve.
According to another aspect of the invention, an air conditioner is disclosed, which comprises the heat exchange system.
According to the throttling valve, the throttling channel is arranged on the valve core, the throttling valve can realize throttling or ultra-low resistance flow through the movement of the valve core, when the valve core is at a throttling position, the valve core is positioned at a refrigerant inlet position, an inlet of the throttling channel is communicated with the refrigerant inlet, and an outlet of the throttling channel is communicated with a refrigerant outlet, so that the throttling function of the throttling valve is realized; when the valve core is located at a normal circulation position, the valve core avoids the refrigerant inlet and the refrigerant outlet, and the refrigerant inlet is directly communicated with the refrigerant outlet through the cavity, so that ultralow-resistance flow is realized, the electronic expansion valve and the electromagnetic valve can be prevented from being used in parallel, the pipeline structure is simplified, and the reliability is improved.
Drawings
FIG. 1 is a schematic illustration of a throttle valve spool of a first embodiment of the present invention in a normal flow position;
FIG. 2 is a schematic view showing the construction of a throttle valve according to the first embodiment of the present invention;
FIG. 3 is a schematic illustration of the throttle valve spool of the first embodiment of the present invention in a throttled position;
FIG. 4 is a schematic illustration of the throttle valve spool of the second embodiment of the present invention in a normal flow position;
FIG. 5 is a schematic view showing the construction of a throttle valve according to a second embodiment of the present invention;
FIG. 6 is a schematic illustration of a throttle valve spool of a second embodiment of the present invention in a throttled position;
FIG. 7 is a schematic illustration of the throttle valve spool of the third embodiment of the present invention in the normal flow position;
FIG. 8 is a schematic view showing the construction of a throttle valve according to a third embodiment of the present invention;
FIG. 9 is a schematic illustration of a throttle valve spool of a third embodiment of the present invention in a throttled position;
legend: 10. a valve body; 11. a refrigerant inlet; 12. a refrigerant outlet; 13. an air pressure chamber; 14. a communicating chamber; 15. a limiting part; 20. a valve core; 21. a throttling channel; 22. a protrusion; 30. a return spring; 40. a restoring elastic member; 50. and (6) a pressure tapping pipe.
Detailed Description
The present invention is further illustrated by the following examples, but is not limited to the details of the description.
As shown in fig. 1 to 9, the present invention discloses a throttle valve, which comprises a valve body 10 and a valve core 20, wherein the valve body 10 has a cavity, a refrigerant inlet 11 and a refrigerant outlet 12, and both the refrigerant inlet 11 and the refrigerant outlet 12 are communicated with the cavity; the valve core 20 is movably arranged in the valve body 10, the valve core 20 is provided with a throttling channel 21, and the valve core 20 is provided with a throttling position and a normal flowing position; in the throttling position, the valve core 20 is positioned at the position of the refrigerant inlet 11, the inlet of the throttling channel 21 is communicated with the refrigerant inlet 11, and the outlet of the throttling channel 21 is communicated with the refrigerant outlet 12; in the normal circulation position, the valve core 20 avoids the refrigerant inlet 11 and the refrigerant outlet 12, the refrigerant inlet 11 is directly communicated with the refrigerant outlet 12 through the cavity, and the valve core 20 is switched between the throttling position and the normal position through movement.
According to the throttle valve, the throttle channel 21 is arranged on the valve core 20, the throttle valve can realize throttling or ultra-low resistance flow through the movement of the valve core 20, when the valve core 20 is at a throttling position, the valve core 20 is positioned at a refrigerant inlet 11, an inlet of the throttle channel 21 is communicated with the refrigerant inlet 11, and an outlet of the throttle channel 21 is communicated with the refrigerant outlet 12, so that the throttle valve realizes throttling; when the valve core 20 is located at the normal circulation position, the valve core 20 avoids the refrigerant inlet 11 and the refrigerant outlet 12, and the refrigerant inlet 11 is directly communicated with the refrigerant outlet 12 through the cavity, so that ultra-low resistance flow is realized, parallel use of an electronic expansion valve and an electromagnetic valve can be avoided, the pipeline structure is simplified, and the reliability is improved.
In the first embodiment shown in fig. 1 to 3, the valve core 20 divides the cavity into an air pressure chamber 13 and a communication chamber 14, the air pressure chamber 13 is communicated with an air source, and the communication chamber 14 is communicated with the refrigerant outlet 12; there is a pressure difference between the pneumatic chamber 13 and the communication chamber 14, and the valve element 20 is moved by the pressure difference between the pneumatic chamber 13 and the communication chamber 14. The throttle valve of the invention adopts the valve core 20 to divide the cavity into the air pressure chamber 13 and the communication chamber 14, when in use, air pressure can be applied to the air pressure chamber 13, so that pressure difference is formed between the air pressure chamber 13 and the communication chamber 14, and the valve core 20 is driven to displace to a throttling position.
In the above embodiment, in the normal flow position, the refrigerant inlet 11 is directly communicated with the communication chamber 14. The throttle valve of the invention directly communicates the refrigerant inlet 11 with the communicating chamber 14, thereby directly discharging the refrigerant from the refrigerant outlet 12 through the communicating chamber 14 and realizing low resistance circulation.
In the above embodiment, the refrigerant inlet 11 is located on the sidewall of the valve body 10, the inlet of the throttle passage 21 is located on the sidewall of the valve core 20, and in the throttle position, the inlet of the throttle passage 21 corresponds to and communicates with the refrigerant inlet 11. The throttle valve of the invention realizes throttling by arranging the inlet of the throttling channel 21 on the side wall of the valve body 10, and when in the throttling position, the inlet of the throttling channel 21 is butted and communicated with the position of the refrigerant inlet 11.
In the above embodiment, the valve core 20 is further provided with the protrusion 22, the protrusion 22 is located in the communication chamber 14, the outlet of the throttle passage 21 is located at the end of the protrusion 22, and the throttle passage 21 is communicated with the communication chamber 14. The throttle valve of the invention can extend the throttle channel 21 into the bulge 22 by arranging the bulge 22, and an outlet is formed at the end part of the bulge 22, thereby prolonging the length of the throttle channel 21 and improving the throttling effect, and simultaneously, because the maximum diameter of the bulge 22 is smaller than the inner diameter of the valve body 10, a gap is formed between the outer wall of the bulge 22 and the inner wall of the valve body 10, so that the refrigerant inlet 11 can be communicated with the communicating chamber 14 by moving the valve core 20 for a short distance, thereby effectively avoiding the overlong moving distance and saving materials.
In the above embodiment, the throttle valve further includes a return spring 30, the return spring 30 is elastically disposed in the communicating chamber 14, the return spring 30 is sleeved on the protrusion 22, one end of the return spring 30 abuts on the inner wall of the valve body 10, the other end of the return spring 30 abuts on the valve core 20, and the return spring 30 is used for returning the valve core 20 from the throttling position to the normal circulation position. The throttle valve of the present invention can make the protrusion 22 play a guiding role by arranging the protrusion 22 on the valve core 20, so that the operation of the return spring 30 is more reliable. When in use, under the push of high pressure in the air pressure chamber 13, the valve core 20 overcomes the return spring 30 to move to the throttling position; when the air pressure in the air pressure chamber 13 is reduced to a certain value, the return spring 30 pushes the valve core 20 to return to the normal flow position, thereby realizing the switching between the shutoff state and the low-resistance flow state. In addition, the end of the return spring 30 may be fixed to the inner walls of the valve core 20 and the valve body 10, respectively, so that the return spring 30 may fix the circumferential relative positions of the valve core 20 and the valve body 10, thereby preventing the valve core 20 from rotating around the axis, ensuring that the inlet of the throttling channel 21 of the valve core 20 corresponds to the position of the refrigerant inlet 11, and improving the stability of use.
In the above embodiment, the flow surface area of the communication chamber 14 is gradually reduced in the displacement direction in which the valve body 20 is displaced to the throttle position. According to the throttle valve, the area of the flow surface of the communication chamber 14 is gradually reduced, so that the inner wall of the communication chamber 14 forms a bending step structure, and the valve core 20 is limited; in addition, the inclined surface formed by the communicating chamber 14 can accelerate the flow of the refrigerant, thereby realizing multiple purposes.
In the above embodiment, the end of the protrusion 22 is directed to the refrigerant outlet 12. The throttle passage 21 forms a straight pipe passage in a portion located at the boss 22, and the axis of the straight pipe passage is parallel or collinear with the axis of revolution of the boss 22. The throttle valve of the invention leads the end part of the bulge 22 to point to the refrigerant outlet 12, and leads the axial line of the straight pipe channel to be parallel or collinear with the rotary axial line of the bulge 22, thereby leading the throttled refrigerant to directly enter the refrigerant outlet 12, shortening the refrigerant stroke and leading the throttled refrigerant to be smoothly discharged.
Of course, in addition to the return spring 30 of the first embodiment, the throttle valve further includes a return elastic member 40, the return elastic member 40 is elastically disposed in the pneumatic chamber 13 or the communication chamber 14, one end of the return elastic member 40 is fixedly connected to the inner wall of the valve body 10, the other end of the return elastic member 40 is connected to the valve core 20, and the return elastic member 40 is used to return the valve core 20 from the throttle position to the normal flow position. In the second embodiment shown in fig. 4 to 6, the return elastic member 40 is disposed in the air pressure chamber 13, and the throttle valve of the present invention can return the valve element 20 from the throttle position to the normal flow position by disposing the return elastic member 40, thereby achieving switching between the throttle and the low resistance flow. In addition, the end of the elastic return element 40 may be fixed to the inner walls of the valve core 20 and the valve body 10, respectively, which is advantageous in that the elastic return element 40 may fix the circumferential relative positions of the valve core 20 and the valve body 10, thereby preventing the valve core 20 from rotating around the axis, ensuring that the inlet of the throttling channel 21 of the valve core 20 corresponds to the position of the refrigerant inlet 11, and improving the stability of use.
In the third embodiment shown in fig. 7 to 9, the valve body 10 is further provided with a limiting portion 15, and in the throttling position, the valve core 20 is in limiting fit with the limiting portion 15. The limiting part 15 is an annular bulge or a limiting convex hull on the inner wall of the valve body 10. The throttle valve of the present invention can stop the movement of the spool 20 at the throttle position by providing the stopper 15, thereby achieving the throttling.
In another embodiment, a first guide portion is provided on the inner wall of the valve body 10, a second guide portion corresponding to the first guide portion is provided on the valve core 20, the first guide portion and the second guide portion are slidably engaged in the axial direction of the valve body 10, and the first guide portion and the second guide portion are engaged in a limited manner in the circumferential direction of the valve body 10, so that the valve core 20 can move only in the axial direction of the valve body 10. The throttle valve of the invention can enable the valve core 20 to only move along the axial direction of the valve body 10 by arranging the first guide part and the second guide part, thereby preventing the valve core 20 from rotating around a central axis and ensuring that the inlet of the throttle channel 21 of the valve core 20 corresponds to the position of the refrigerant inlet 11. In addition, in the process of installing the valve core 20, after the first guide part and the second guide part are correspondingly installed, the inlet of the throttling channel 21 can be ensured to be corresponding to the refrigerant inlet 11, and the valve core is multipurpose. In a specific implementation process, the first guide part is a guide rail or a guide groove, and the second guide part is a guide groove or a guide rail matched with the first guide part.
In another embodiment, a first guide portion is disposed on the inner wall of the valve body 10, a second guide portion corresponding to the first guide portion is disposed on the valve core 20, the first guide portion and the second guide portion are slidably engaged in the axial direction of the valve core 20, and the first guide portion and the second guide portion are engaged in a limited manner in the circumferential direction of the valve core 20, so that the valve core 20 can move only in the axial direction thereof. The throttle valve of the invention can enable the valve core 20 to only move along the self axial direction by arranging the first guide part and the second guide part, thereby preventing the valve core 20 from rotating around a central axis and ensuring that the inlet of the throttle channel 21 of the valve core 20 corresponds to the position of the refrigerant inlet 11. In addition, in the process of installing the valve core 20, after the first guide part and the second guide part are correspondingly installed, the inlet of the throttling channel 21 can be ensured to be corresponding to the refrigerant inlet 11, and the valve core is multipurpose. In a specific implementation process, the first guide part is a guide rail or a guide groove, and the second guide part is a guide groove or a guide rail matched with the first guide part.
In the above embodiment, the cross-section of the valve body 10 is non-circular. The valve body 10 of the throttle valve of the present invention is non-circular in cross-section, for example: the valve core 20 is in a shape matched with the valve body 10, and the valve core 20 and the valve body 10 can be prevented from moving relatively in the circumferential direction by adopting the arrangement mode, so that the inlet of the throttling channel 21 of the valve core 20 corresponds to the position of the refrigerant inlet 11.
In the above embodiment, the throttle valve further comprises a pressure tapping pipe 50, a first end of the pressure tapping pipe 50 is communicated with the air pressure chamber 13, and a second end of the pressure tapping pipe 50 is communicated with the air source. The throttle valve of the invention can enable the air pressure chamber 13 to be communicated with an air source through the pressure sampling pipe 50 by arranging the pressure sampling pipe 50, thereby generating high pressure which can push the valve core 20 to move in the air pressure chamber 13. By adopting the pressure sampling pipe 50, because the flow velocity of the refrigerant in the pressure sampling pipe 50 is approximately 0, the flow resistance is ignored, and the pressure of the rest most of the high-pressure refrigerant gas flowing from the condenser to the throttling channel has great loss, therefore, the pressure in the air pressure chamber 13 is greater than the pressure in the communicating chamber 14, and the piston can be pushed to move downwards.
In the specific implementation process, the valve body 10 can be designed to be a T-shaped structure, the valve body 10 can be obtained through processes such as reducing forming or welding forming, the refrigerant inlet 11 of the valve body 10 is welded with the inlet pipe, preferably, the refrigerant inlet 11 is made into a flanging hole which is turned outwards, the diameter of the inlet pipe is D, the inlet pipe is inserted into the flanging hole for welding and sealing, and the insertion end of the inlet pipe is ensured not to protrude out of the inner wall of the valve body 10, so that the valve core 20 is prevented from being blocked in movement.
One end of the valve body 10 is a refrigerant outlet 12, the other end is provided with a sealing end cover, the sealing end cover is welded and sealed with the valve body 10, the reset elastic piece 40 is fixed on the end face of the valve core 20 and the sealing end cover, and the sealing end cover is connected with an outward pressure sampling pipe 50 or a pressure sampling pipe interface.
The bulge 22 of the valve core 20 facing the refrigerant outlet 12 can be made into a reverse truncated cone shape or a conical structure, certainly not limited to a shape, or can be a bulge of a cylinder, a square column and other structures, which can shorten the refrigerant flow stroke, guide the return spring 30, reduce the movement distance of the valve core 20, reduce the mass of the valve core 20 and other effects, the valve core 20 is internally provided with a throttling channel 21, the throttling channel 21 comprises two parts, one part is a slender throttling section positioned in the bulge, the aperture is D, which plays a throttling role, the end of the throttling section is vertically and outwards provided with another distribution section with a larger diameter and leading to the outer wall surface of the valve core 20, the aperture range of the distribution section is 0.5D or more and is less than the aperture D, the surface of the valve core 20 is provided with a chamfer angle to form a smooth transition hole, wherein the outer edge aperture D is provided, and the horizontal depth of the distribution section exceeds the, thus, the processing is convenient, and the closest distance between the edge of the chamfered hole on the surface of the valve core 20 and the end surface of the middle part of the valve core 20 of the distribution section is D-D.
It should be noted that the return spring 30 or the return elastic member 40 needs to be designed and calculated, and the main influencing factors include the working range of the pressure of the air pressure chamber, the mass of the piston body, the throttle reduction value, the flow rate, and the like.
In addition, the valve core 20 is made of a low-friction coefficient material, such as polytetrafluoroethylene, the outer diameter of the valve core is closely matched with the inner diameter of the valve body 10, the leakage quantity in the air pressure chamber 13 through a gap between the valve core 20 and the valve body 10 is guaranteed to be controlled within a design range, and the leaked pressure does not exceed the pressure value after throttling and pressure reduction of the throttling channel 21.
According to a fourth embodiment of the invention, a heat exchange system is disclosed, comprising the throttle valve described above.
The heat exchange system can communicate the second end of the pressure sampling pipe 50 with the exhaust pipe of the compressor, drive the valve core 20 to operate through high-pressure exhaust, the valve core 20 with the built-in throttling channel 21 moves under the actions of high-pressure gas pressure, spring force, gravity of the valve core 20 and the like, and the throttling channel 21 is connected in series to the original ultra-low resistance flow channel to realize throttling decompression; when the heat exchange system is shut down, the high-pressure exhaust pressure is reduced, the valve core 20 returns to the original position under the drive of the spring force, the throttling channel exits from the original ultra-low resistance flow channel, and then the system realizes an ultra-low resistance operation mode. The lower part of the valve body 10 is subjected to reducing deformation or a limiting ring, a limiting convex hull and the like are adopted to limit the lowest descending position of the piston. The throttling valve of the invention does not need to be driven by an external power supply, can realize throttling and pressure reduction through the throttling channel 21 and can realize circulation with ultra-low resistance, thereby reducing the control difficulty of the system and simplifying a heat exchange system.
According to a fifth embodiment of the invention, an air conditioner is disclosed, comprising the heat exchange system.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes and modifications which are obvious to the technical scheme of the invention are covered by the protection scope of the invention.
Claims (19)
1. A throttle valve, comprising:
the valve body (10) is provided with a cavity, a refrigerant inlet (11) and a refrigerant outlet (12), and the refrigerant inlet (11) and the refrigerant outlet (12) are communicated with the cavity;
a valve spool (20), the valve spool (20) movably disposed within the valve body (10), the valve spool (20) having a throttling passage (21), the valve spool (20) having a throttling position and a normal flow position;
in the throttling position, the valve core (20) is positioned at the refrigerant inlet (11), the inlet of the throttling channel (21) is communicated with the refrigerant inlet (11), and the outlet of the throttling channel (21) is communicated with the refrigerant outlet (12);
in the normal circulation position, the valve core (20) avoids the refrigerant inlet (11) and the refrigerant outlet (12), the refrigerant inlet (11) is directly communicated with the refrigerant outlet (12) through the cavity, and the valve core (20) is switched between the throttling position and the normal position through movement.
2. The throttling valve of claim 1,
the valve core (20) divides the cavity into a pneumatic chamber (13) and a communicating chamber (14), the pneumatic chamber (13) is communicated with the air source, and the communicating chamber (14) is communicated with the refrigerant outlet (12);
the pressure difference exists between the air pressure chamber (13) and the communication chamber (14), and the valve core (20) moves under the driving of the pressure difference existing between the air pressure chamber (13) and the communication chamber (14).
3. The throttling valve of claim 2,
in the normal circulation position, the refrigerant inlet (11) is in direct communication with the communication chamber (14).
4. The throttling valve of claim 2,
the refrigerant inlet (11) is positioned on the side wall of the valve body (10), the inlet of the throttling channel (21) is positioned on the side wall of the valve core (20), and the inlet of the throttling channel (21) corresponds to and is communicated with the refrigerant inlet (11) at the throttling position.
5. The throttling valve of claim 2,
the valve core (20) is further provided with a bulge (22), the bulge (22) is located in the communication chamber (14), an outlet of the throttling channel (21) is located at the end of the bulge (22), and the throttling channel (21) is communicated with the communication chamber (14).
6. The choke valve of claim 5, further comprising:
the return spring (30) is elastically arranged in the communicating chamber (14), the return spring (30) is sleeved on the protrusion (22), one end of the return spring (30) is abutted to the inner wall of the valve body (10), the other end of the return spring (30) is abutted to the valve core (20), and the return spring (30) is used for returning the valve core (20) to the normal circulation position from the throttling position.
7. The throttling valve of claim 5,
the end of the projection (22) points to the refrigerant outlet (12).
8. The throttling valve according to claim 5 or 7,
the throttling channel (21) forms a straight pipe channel at the part positioned on the bulge (22), and the axis of the straight pipe channel is parallel or collinear with the rotation axis of the bulge (22).
9. The choke valve of claim 2, further comprising:
the valve body (10) is provided with a throttling position, the valve body (20) is communicated with the communicating chamber (14) through a communicating pipe, the valve body (13) is communicated with the communicating chamber (14) through a communicating pipe, the valve body (10) is communicated with the communicating chamber through a communicating pipe, the communicating chamber is communicated.
10. The throttling valve of claim 6,
the flow surface area of the communication chamber (14) is gradually reduced in the displacement direction in which the valve element (20) is displaced to the throttle position.
11. The throttling valve of claim 1,
the valve body (10) is further provided with a limiting part (15), and the valve core (20) is in limiting fit with the limiting part (15) at the throttling position.
12. The throttling valve of claim 11,
the limiting part (15) is an annular bulge on the inner wall of the valve body (10).
13. The throttling valve of claim 1,
the valve is characterized in that a first guide part is arranged on the inner wall of the valve body (10), a second guide part corresponding to the first guide part is arranged on the valve core (20), the first guide part and the second guide part are in sliding fit in the axial direction of the valve body (10), and meanwhile, the first guide part and the second guide part are in limiting fit in the circumferential direction of the valve body (10) so that the valve core (20) can only move in the axial direction of the valve body (10).
14. The throttling valve of claim 1,
the inner wall of the valve body (10) is provided with a first guide part, the valve core (20) is provided with a second guide part corresponding to the first guide part, the first guide part and the second guide part are in sliding fit in the axial direction of the valve core (20), and meanwhile, the first guide part and the second guide part are in limited fit in the circumferential direction of the valve core (20) so that the valve core (20) can only move along the axial direction of the valve core (20).
15. The throttling valve according to claim 13 or 14,
the first guide part is a guide rail or a guide groove, and the second guide part is a guide groove or a guide rail matched with the first guide part.
16. The throttling valve of claim 1,
the cross section of the valve body (10) is non-circular.
17. The choke valve of claim 2, further comprising:
the first end of the pressure sampling pipe (50) is communicated with the air pressure chamber (13), and the second end of the pressure sampling pipe (50) is communicated with an air source.
18. A heat exchange system comprising a throttling valve according to any one of claims 1 to 17.
19. An air conditioner comprising the heat exchange system of claim 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010930276.5A CN112212020A (en) | 2020-09-07 | 2020-09-07 | Pneumatic adjustable throttle valve, refrigerating system and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010930276.5A CN112212020A (en) | 2020-09-07 | 2020-09-07 | Pneumatic adjustable throttle valve, refrigerating system and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112212020A true CN112212020A (en) | 2021-01-12 |
Family
ID=74049166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010930276.5A Withdrawn CN112212020A (en) | 2020-09-07 | 2020-09-07 | Pneumatic adjustable throttle valve, refrigerating system and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112212020A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024001519A1 (en) * | 2022-06-27 | 2024-01-04 | 上海海立新能源技术有限公司 | Integrated throttling and pressure-relief valve and compressor comprising same |
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| JP2002323273A (en) * | 2001-04-26 | 2002-11-08 | Daikin Ind Ltd | Expansion valve and air conditioner |
| JP2004293797A (en) * | 2003-02-06 | 2004-10-21 | Saginomiya Seisakusho Inc | Throttle valve device and air conditioner |
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| WO2024001519A1 (en) * | 2022-06-27 | 2024-01-04 | 上海海立新能源技术有限公司 | Integrated throttling and pressure-relief valve and compressor comprising same |
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Application publication date: 20210112 |