CN111102769B - Throttling device and air conditioner - Google Patents
Throttling device and air conditioner Download PDFInfo
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- CN111102769B CN111102769B CN201811270458.3A CN201811270458A CN111102769B CN 111102769 B CN111102769 B CN 111102769B CN 201811270458 A CN201811270458 A CN 201811270458A CN 111102769 B CN111102769 B CN 111102769B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/38—Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
Abstract
The invention provides a throttling device, which comprises a shell and a channel which is enclosed by the shell and is suitable for medium to flow through, wherein a valve body assembly is arranged in the channel, the valve body assembly comprises a valve core and a valve matched with the valve core, a plurality of throttling holes suitable for medium to flow through are arranged on the valve core, and the valve is suitable for moving to open or close at least one throttling hole; the throttle valve is improved from the throttling structure of the throttling short pipe, the valve body is provided with a plurality of throttling holes, the shape of the adjacent positions of the throttling holes can open or block the corresponding number of throttling holes so as to adjust and unload the system pressure step by step, and meanwhile, the pressure protection effect caused by overhigh system pressure is solved; effectively changing the problem of single characteristic of the original throttle valve.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a throttling device and an air conditioner.
Background
Nowadays, a refrigerating apparatus such as an air conditioner is widely used because it can store articles at a low temperature. In the refrigeration systems of these refrigeration appliances, the throttling component is a very important component of the system. At present, capillary tubes, throttling short tubes, electronic expansion valves and the like are commonly used as throttling components of air-conditioning refrigeration systems. The cost of the capillary tube and the throttling short tube is lower than that of the electronic expansion valve, and the throttling mode is fixed and cannot be adjusted. The electronic expansion valve can adjust the opening under different working conditions to change the pressure and temperature of the system, but the cost is higher. The throttling mode of the throttling short pipe is fixed, and the throttling of the throttling short pipe has limitation.
The existing throttle valve comprises a pipe body which is circulated with a refrigerant, wherein a heating valve body and a refrigerating valve body are fixedly connected to the inner wall of the pipe body, a heating valve core hole and a heating valve cavity communicated with the heating valve core hole are formed in the heating valve body, a heating sliding block is connected in the heating valve cavity in a sliding mode, and a heating guide hole communicated with the inside of the pipe body is formed in the inner wall of the heating valve cavity; the refrigeration valve body is internally provided with a refrigeration valve core hole and a refrigeration valve cavity communicated with the refrigeration valve core hole, a refrigeration sliding block is connected in the refrigeration valve cavity in a sliding manner, and the inner wall of the refrigeration valve cavity is provided with a refrigeration flow guide hole communicated with the interior of the pipe body; the heating valve body and the refrigerating valve body are arranged side by side and are kept away from the heating diversion hole and the refrigerating diversion hole which are fixedly connected.
The internal structure of the existing throttling short pipe comprises a refrigeration valve core and a heating valve core; when in refrigerating operation, the heating valve core is pushed to be closed by system pressure; during heating operation, the refrigeration valve core is closed; the valve core in the throttling sleeve with the structure is single in reversing, and the pressure of the system cannot be unloaded, so that the temperature of the system can be changed.
Disclosure of Invention
In view of the above, the present invention is directed to a throttle valve and a throttle adjusting method thereof to solve the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a throttling device comprises a shell and a channel which is enclosed by the shell and is suitable for medium to flow through, a valve body assembly is arranged in the channel, the valve body assembly comprises a valve core and a valve matched with the valve core, a plurality of throttling holes suitable for medium to flow through are formed in the valve core, and the valve is suitable for moving to open or close at least one throttling hole.
Further, the valve core is fixedly arranged on the inner wall of the shell and extends along the channel direction; the valve is a slider adapted to move in the direction of the channel to open or close at least one of the orifices.
Furthermore, an elastic element is arranged in the channel, one end of the elastic element is fixed on the shell along the axial direction, and the other end of the elastic element is fixedly connected with the valve; the valve is adapted to overcome the elastic force of the elastic element when the pressure of the medium in the channel increases, so as to realize the movement along the channel direction.
Further, the valve body assembly further comprises a limiting slide way extending along the channel direction, and the valve and the elastic element are arranged on the limiting slide way.
Further, the elastic element is a coil spring.
Further, the valve body assembly comprises a first valve body assembly and a second valve body assembly, and the medium in the channel is suitable for flowing through the first valve body assembly along a first direction through a flow channel between the first valve body assembly and the shell; the medium in the passage is adapted to flow through a flow passage between the second valve body assembly and the housing in a direction opposite to the first direction.
Further, the valve of the first valve body assembly is arranged in parallel with the valve core of the first valve body assembly in a direction perpendicular to the channel direction; the valve of the second valve body assembly is arranged in parallel with the valve core of the second valve body assembly; the valve core of the first valve body assembly is positioned adjacent to the valve of the second valve body assembly along the channel direction; the valve core of the second valve body assembly is positioned adjacent to the valve of the first valve body assembly.
Further, the first valve body assembly and the second valve body assembly are sequentially arranged along the channel direction; a first elastic element and a second elastic element are further arranged in the channel; one end of the first elastic element is fixedly connected with the valve core of the second valve body assembly, and the other end of the first elastic element is fixedly connected with the valve matched with the valve core of the first valve body assembly; one end of the second elastic element is fixedly connected to the valve core of the first valve body assembly, and the other end of the second elastic element is fixedly connected to a valve matched with the valve core of the second valve body assembly.
Furthermore, along the channel direction, at least one side of the valve body assembly is provided with a filter screen.
Further, the filter screen is conical, the central axis of the filter screen is consistent with the direction of the channel, and the radius of the filter screen is gradually increased along the direction of the medium flow until the filter screen is contacted with the valve body assembly.
An air conditioner, the air conditioner includes above-mentioned throttling arrangement.
Compared with the prior art, the throttle valve has the following advantages:
the throttle valve is improved from the throttling structure of the throttling short pipe, a switch is arranged on one side of the throttling hole, and the throttling holes with corresponding quantity can be opened or blocked by the switch; the throttle valve is improved from the throttling structure of the throttling short pipe, the valve body is provided with a plurality of throttling holes, the shape of the adjacent positions of the throttling holes can open or block the corresponding number of throttling holes so as to adjust and unload the system pressure step by step, and meanwhile, the pressure protection effect caused by overhigh system pressure is solved; effectively changing the problem of single characteristic of the original throttle valve.
In the invention, the first valve core and the second valve core are provided with a plurality of (three or more than three) throttling holes, and filter screens are arranged at two ends of the medium (refrigerant) flowing direction. The valve core switch is controlled by a slide block, and the slide block is fixed by a spring. The system pressure pushes the sliding block to move, the valve core is adjusted to be opened, the larger the pressure is, the more the valve core is opened, and therefore the pressure of the unloading system can be achieved, and meanwhile the pressure protection effect caused by overhigh system pressure is solved. The invention adjusts the opening of the throttle holes of the valve core according to the characteristics of the refrigerant and different pressures of the system by the valve cores of the throttle holes, thereby reducing the pressure of the system and improving the capacity of the system under high temperature and high pressure. Meanwhile, the single characteristic of the original throttle valve can be changed, and the problem that the system cannot be refrigerated due to frequent protection under high-temperature, low-pressure or severe working conditions is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a fully closed state of a throttle valve according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a throttle valve according to an embodiment of the present invention in a heating mode;
FIG. 3 is an enlarged partial schematic view of FIG. 2;
FIG. 4 is a schematic structural diagram of a throttle valve according to an embodiment of the present invention in a cooling mode;
FIG. 5 is an enlarged partial schematic view of FIG. 3;
FIG. 6 is a flow chart of a throttle valve throttling adjustment method according to an embodiment of the invention.
Description of reference numerals:
1-a first filter screen, 2-a second slider, 3-a second spring, 4-a first valve core, 5-a second filter screen, 6-a first slider, 7-a first spring, 8-a second valve core, 9-a channel, 10-a first orifice, 11-a second orifice, 12-a third orifice, 13-a fourth orifice, 14-a fifth orifice, 15-a sixth orifice, 16-a valve body, 17-a first valve body component, 18-a second valve body component, 19-a first end, 20-a second end, 21-a first medium flow passage, 22-a second medium flow passage, 23-a first limit slide way, 24-a second limit slide way.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In addition, in the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "provided", "mounted", "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A short pipe throttle valve comprises a valve body 16, wherein the outer wall of the valve body 16 is a shell made of metal, and a medium flowing channel 9 is formed inside the shell. The valve body 16 comprises a first valve body assembly 17 and a second valve body assembly 18, and the first valve body assembly 17 and the second valve body assembly 18 are arranged in sequence along the channel direction; the first valve body assembly 17 includes a first valve spool 4; in the direction perpendicular to the channel, a first limiting slide way 23 is arranged on one side of the first valve core 4, and a first medium flow channel 21 is formed between the other side of the first valve core and the shell; the first limiting slide way 23 and the first medium flow channel 21 are consistent with the channel direction; a first slide block 6 is arranged in the first limit slide way 23, the first slide block 6 is matched with the first valve core 4, and the first slide block 6 is suitable for moving along the first limit slide way 23 to open or close the first valve core 4.
The second valve body assembly 18 includes a second valve spool 8; in the direction perpendicular to the channel direction, a second limiting slide way 24 is arranged on one side of the second valve core 8, and a second medium flow channel 22 is formed between the other side of the second valve core and the outer shell; the directions of the second limiting slide way 24 and the second medium flow channel 22 are consistent with the channel direction; a second slide block 2 is arranged in the second limit slide way 24, the second slide block 2 is matched with the second valve core 8, and the second slide block 2 is suitable for moving along the second limit slide way 24 to open or close the second valve core 8.
Perpendicular to the channel direction, the first slide block 6 of the first valve body assembly 17 is arranged in parallel with the first valve core 4 of the first valve body assembly 17; the second slide block 2 of the second valve body assembly 18 is arranged in parallel with the second valve core 8 of the second valve body assembly 18; in the channel direction, the first valve core 4 of the first valve body assembly 17 is positioned adjacent to the second sliding block 2 of the second valve body assembly 18; the second spool 8 of the second valve body assembly 18 is located adjacent to the first slider 6 of the first valve body assembly 17. The throttle valve is more compact in structure due to the arrangement, and the space can be effectively saved.
The channel 9 comprises a first end 19 and a second end 20, the second end 20 communicating with a first medium flow channel 21 and the first end 19 communicating with a second medium flow channel 22. The direction from the first end 19 to the second end 20 is denoted as a first direction. The direction opposite to the first direction, i.e. from the second end 20 to the first end 19, is denoted as the second direction.
A first spring 7 is arranged in the first limiting slide rail 23, and a second spring 3 is arranged in the second limiting slide rail 24; one end of the first spring 7 is fixedly connected to the second valve core 8 of the second valve body assembly 18, and the other end of the first spring is fixedly connected to the first slide block 6 matched with the first valve core 4 of the first valve body assembly 17; one end of the second spring 3 is fixedly connected to the first valve core 4 of the first valve body assembly 17, and the other end is fixedly connected to the second slide block 2 matched with the second valve core 8 of the second valve body assembly 18.
As shown in fig. 2 to 3, the first valve body 4 is provided with a first orifice 10, a second orifice 11 and a third orifice 12, the first orifice 10, the second orifice 11 and the third orifice 12 are communicated with the channels 9 on two opposite sides of the first valve body 4, namely, the first orifice 10, the second orifice 11 and the third orifice 12 are communicated with a first end 19 of the channel 9 and a first medium channel 21; the first orifice 10, the second orifice 11, and the third orifice 12 are arranged in parallel and perpendicular to the axis of the passage 9.
As shown in fig. 4 to 5, the second valve body 8 is provided with a fourth orifice 13, a fifth orifice 14 and a sixth orifice 15, the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15 are communicated with the passages 9 on the opposite sides of the second valve body 8, that is, the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15 are communicated with the second end 20 of the passage 9 and the second medium flow passage 22; the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15 are arranged in parallel and perpendicular to the axis of the passage 9. The second sliding block 2 can move in the second limiting slide way 24 along the axis direction of the channel 9 under the action of external force. When the second slider 2 is not subjected to external force, the second slider 2 is positioned adjacent to the second valve core 8, and can seal the second valve core 8.
When the first slider 6 is not subjected to an external force, the first slider 6 can close the first orifice 10, the second orifice 11, and the third orifice 12. The first slider 6 moves in the direction of the second valve body 8 by an external force, and opens the first orifice 10, the second orifice 11, and the third orifice 12 in this order, thereby communicating the first end 19 of the passage 9 with the first medium flow passage 21.
When the second slider 2 is not subjected to external force, the second slider 2 is positioned adjacent to the second valve core 8, and can seal the second valve core 8. That is, when the second slider 2 is not subjected to an external force, the second slider 2 can close the fourth orifice 13, the fifth orifice 14, and the sixth orifice 15. When the second slider 2 receives an external force, the second slider 2 moves in the direction of the first valve body 4, and the fourth orifice 13, the fifth orifice 14, and the sixth orifice 15 can be opened in this order to communicate the second end 20 of the passage 9 with the second medium flow passage 22.
A first filter screen 1 and a second filter screen 5 are arranged in the channel 9, and the first filter screen 1 is arranged on one side of the second valve core 8 close to the second end 20; the second filter screen 5 is arranged on one side of the first valve core 4 close to the first end 19; namely, the first filter 1 and the second filter 5 are disposed outside both ends of the first valve body assembly 17 and the second valve body assembly 18. The first filter 1 and the second filter 5 are located upstream or downstream of the flow of the medium, depending on the direction of the flow of the medium. When the first filter screen 1 or the second filter screen 5 is positioned at the upstream of the medium flowing, the first filter screen or the second filter screen is mainly used for filtering impurities in the medium, so that the possibility that the impurities in the medium impact the inner wall of the channel 9 is reduced, and meanwhile, the phenomenon that the impurities block the throttling channel in the valve core to influence the service life of the short pipe throttling valve is avoided. When first filter screen 1 or second filter screen 5 are located the low reaches that the medium flows, through the filtering action of first filter screen 1 or second filter screen 5 for the flow frequency of medium changes, thereby reduces the probability that bubble breakage collides passageway 9 in the medium, makes the noise source weakened greatly, thereby reduces the noise when stub throttle valve uses. According to the invention, damping materials are not required to be added to wrap the valve body, and the valve has the advantages of reasonable structure and good reliability.
Throttle passages (i.e., the above-described throttle holes) are provided in the first and second valve spools 4 and 8, and the flow passage cross-section abruptly decreases between the passage 9 in the valve body 16 and the throttle passage in the first or second valve spool 4 or 8. This causes a great increase in the flow rate of the refrigerant, and a severe friction is generated between the refrigerant and the inner wall of the throttle passage and the refrigerant. In order to avoid that impurities in the system block the first valve spool 4 or the second valve spool 8, a filter screen is arranged upstream in the refrigerant flow direction in the channel 9 for filtering out impurities in the refrigerant.
The refrigerant flows in the throttling channel, the pressure of the refrigerant is reduced due to the friction effect, part of the refrigerant is boiled and evaporated until the throttling channel is communicated with the channel 9, and the refrigerant is in a gas-liquid two-phase state. And the other filter screen is fixedly arranged at one end of the first valve core 4 or the second valve core 8 which flows out in a gas-liquid two-phase state corresponding to the flowing direction of the refrigerant.
The first filter mesh 1 and the second filter mesh 5 are preferably filters having a mesh structure, such as a mesh filter made of copper or other metal. For optimal filtering, the first filter 1 and the second filter 5 are preferably made in a conical shape with their central axes coinciding with the axis of the channel 9, the radius increasing gradually in the direction of the refrigerant flow until they come into contact with the valve core. Therefore, on one hand, the flow path of the refrigerant is met, the sufficient filtering area can be ensured, on the other hand, the refrigerant can be sufficiently filtered and rectified, and the phenomenon that bubbles in the refrigerant are broken at the edge of the filter screen to form impact on the pipe wall is prevented.
First filter screen 1 and second filter screen 5 are fixed to be set up in passageway 9, avoid high-pressure refrigerant collision to lead to first filter screen 1 and second filter screen 5 to remove in passageway 9, influence the filter effect. The first filter 1 and the second filter 5 may be welded or other similar fixed connection means, so as to ensure that the positions of the first filter and the second filter in the channel 9 are not displaced along with the flow of the refrigerant, and ensure the stability of the short-pipe throttling valve.
The filter screen positioned at the downstream of the medium flow has the main functions of filtering and rectifying the refrigerant in a gas-liquid two-phase state, changing the flow frequency of the refrigerant, reducing the breaking frequency of large bubbles in the refrigerant and avoiding the vibration generated by the impact of the bubbles on the pipe wall, thereby achieving the purposes of weakening a noise source and reducing the noise of a pipeline.
The selection of the specific shape of the filter screen is that the filter screen is selected according to the design working condition, the type of the refrigerant and the specific shape of the valve core, and can be set into various forms such as a filter screen with the same cross section with the channel 9, a plurality of layers of filter screens, a filter screen which is outwards in an arc shape, and the like. One preferred embodiment is that the first filter screen 1 and the second filter screen 5 are arranged symmetrically, and the central axis of the filter screens is coincident with the central axis of the valve body.
When the air conditioner operates in a cooling mode, as shown in fig. 2, the refrigerant flows from the first end 19 to the second end 20 along the first direction, the refrigerant firstly passes through the second filter 5, and impurities in the refrigerant are filtered by the second filter 5. Then enters the valve body 16, the refrigerant generates pressure to push the first slide block 6 to move towards the second end 20, the first slide block 6 compresses the first spring 7, and finally the throttle hole on the first valve core 4 is opened. In the embodiment, the refrigerant R22 system is set, when the system high pressure P satisfies 0.8MPa not less than P not more than 2.0MPa, the refrigerant pushes the first slider 6 to move, the first orifice 10 on the first valve core 4 is opened, the refrigerant enters the first medium flow channel 21 from the first end 19 of the channel 9 through the first orifice 10, passes through the first filter screen 1, and finally flows out from the second end 20.
When the high pressure P of the system meets the condition that P is more than 2.0MPa and less than or equal to 2.8MPa, the refrigerant pushes the first sliding block 6 to move, the first throttling hole 10 and the second throttling hole 11 on the first valve core 4 are opened simultaneously, the refrigerant enters the first medium flow passage 21 from the first end 19 of the channel 9 through the first throttling hole 10 and the second throttling hole 11, passes through the first filter screen 1 and finally flows out from the second end 20.
When the system high pressure P satisfies P > 2.8MPa, the refrigerant pushes the first slider 6 to move, the first throttle hole 10, the second throttle hole 11 and the third throttle hole 12 on the first valve core 4 are all opened, the refrigerant enters the first medium flow channel 21 from the first end 19 of the channel 9 through the first throttle hole 10, the second throttle hole 11 and the third throttle hole 12, passes through the first filter screen 1 and finally flows out from the second end 20.
In this embodiment, the elastic force of the first spring 7 is consistent with the high pressure of the system, so as to move corresponding displacement under corresponding medium pressure, thereby opening corresponding throttle holes and realizing step-by-step adjustment. In the cooling mode, when the refrigerant flows from the first end 19 to the second end 20, the second slider 2 is kept stationary, i.e. the second valve element 8 is ensured to be in a closed state.
When the system pressure decreases, the first slider 6 moves toward the first end 19 by the first spring 7, so that the third orifice 12, the second orifice 11, and the first orifice 10 can be sequentially closed, thereby closing the first valve spool 4 step by step according to the pressure.
During heating operation of the air conditioner, as shown in fig. 4, the refrigerant flows from the second end 20 to the first end 19 in the second direction, the refrigerant first passes through the first filter 1, and the first filter 1 filters impurities in the refrigerant. Then enters the valve body 16, the refrigerant generates pressure to push the second slider 2 to move towards the first end 19, the second spring 3 is compressed, and finally the throttle hole on the second valve core 8 is opened. In this embodiment, the R22 refrigerant system is set, when the system high pressure P satisfies 0.8MPa not less than P not more than 2.0MPa, the refrigerant pushes the second slider 2 to move, the fourth orifice 13 on the second valve core 8 is opened, the refrigerant enters the second medium flow passage 22 from the second end 20 of the channel 9 through the fourth orifice 13, passes through the second filter screen 5, and finally flows out from the first end 19.
When the system high pressure P satisfies 2.0MPa < P ≤ 2.8MPa, the refrigerant pushes the second slider 2 to move, the fourth orifice 13 and the fifth orifice 14 on the second valve core 8 are simultaneously opened, and the refrigerant enters the second medium flow passage 22 from the second end 20 of the passage 9 through the fourth orifice 13 and the fifth orifice 14, passes through the second filter screen 5, and finally flows out from the first end 19.
When the system high-pressure P satisfies P > 2.8MPa, the refrigerant pushes the second slider 2 to move, the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15 on the second valve core 8 are opened, the refrigerant enters the second medium flow passage 22 from the second end 20 of the passage 9 through the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15, passes through the second filter screen 5 and finally flows out from the first end 19.
In this embodiment, the elastic force of the second spring 3 is consistent with the high pressure of the system, so as to move corresponding displacement under corresponding medium pressure, thereby opening corresponding throttle holes and realizing step-by-step adjustment. In the cooling mode, when the refrigerant flows from the second end 20 to the first end 19, the first slider 6 is kept stationary, i.e. the first valve element 4 is ensured to be in a closed state.
When the system pressure is reduced, the second slider 2 moves towards the second end 20 under the action of the second spring 3, so that the sixth throttle hole 15, the fifth throttle hole 14 and the fourth throttle hole 13 can be closed in sequence, and the second valve element 8 is closed by closing step by step according to the pressure.
The opening number of throttle orifices is controlled according to the pressure range, the pressure of the whole system can be unloaded, the safe and reliable operation of the system is protected, and overload protection or damage caused by overhigh system pressure is avoided. For different refrigerant types, such as R410A, R32, etc., the pressure range can be set according to the characteristics of the refrigerant and the experiment combination.
The throttle valve is improved from the throttling structure of the throttling short pipe, and the first valve core and the second valve core are both provided with a plurality of (three or more than three) throttling holes. In the cooling or heating mode, the two ends of the refrigerant flowing direction are provided with filter screens (a first filter screen and a second filter screen). The first valve core and the second valve core are controlled by sliding blocks, and the sliding blocks are fixed by springs. The system pressure pushes the sliding block to move, and the throttle holes on the corresponding valve cores are adjusted to be opened, the larger the pressure is, the more the throttle holes are opened, so that the system pressure can be unloaded, and meanwhile, the problem of pressure protection caused by overhigh system pressure is solved. The valve core with a plurality of throttling holes is used for adjusting the opening of the throttling holes on the valve core according to the characteristics of the refrigerant and different pressures of the system, so that the pressure of the system is reduced, and the capacity of the system under high temperature and high pressure is improved. Meanwhile, the single characteristic of the original throttle valve can be changed, and the problem that the system cannot be refrigerated due to frequent protection under high-temperature, low-pressure or severe working conditions is solved.
A throttling regulation method uses the throttling valve, and comprises the following specific steps:
s1: the air conditioner runs, and the air conditioner enters a cooling mode or a heating mode; if yes, go to step S2; if the heating mode is selected, go to step S3;
s2: the first slider 6 moves a corresponding distance towards the second end 20 at different system high pressure, opening a corresponding orifice in the first spool 4.
The method specifically comprises the following steps: when the high pressure P of the system meets the condition that P is more than or equal to 0.8MPa and less than or equal to 2.0MPa, the refrigerant pushes the first sliding block 6 to move, the first throttling hole 10 on the first valve core 4 is opened, the refrigerant enters the first medium flow channel 21 from the first end 19 of the channel 9 through the first throttling hole 10, passes through the first filter screen 1 and finally flows out from the second end 20.
When the high pressure P of the system meets the condition that P is more than 2.0MPa and less than or equal to 2.8MPa, the refrigerant pushes the first sliding block 6 to move, the first throttling hole 10 and the second throttling hole 11 on the first valve core 4 are opened simultaneously, the refrigerant enters the first medium flow passage 21 from the first end 19 of the channel 9 through the first throttling hole 10 and the second throttling hole 11, passes through the first filter screen 1 and finally flows out from the second end 20.
When the system high pressure P satisfies P > 2.8MPa, the refrigerant pushes the first slider 6 to move, the first throttle hole 10, the second throttle hole 11 and the third throttle hole 12 on the first valve core 4 are all opened, the refrigerant enters the first medium flow channel 21 from the first end 19 of the channel 9 through the first throttle hole 10, the second throttle hole 11 and the third throttle hole 12, passes through the first filter screen 1 and finally flows out from the second end 20.
When the system pressure decreases, the first slider 6 moves toward the first end 19 by the first spring 7, so that the third orifice 12, the second orifice 11, and the first orifice 10 can be sequentially closed, thereby closing the first valve spool 4 step by step according to the pressure.
S3: the second slider 2 moves a corresponding distance towards the first end 19 at different system high pressure, opening a corresponding orifice in the second spool 8.
The method specifically comprises the following steps: when the high pressure P of the system meets the condition that P is more than or equal to 0.8MPa and less than or equal to 2.0MPa, the refrigerant pushes the second sliding block 2 to move, the fourth throttling hole 13 on the second valve core 8 is opened, the refrigerant enters the second medium flow passage 22 from the second end 20 of the channel 9 through the fourth throttling hole 13, passes through the second filter screen 5 and finally flows out from the first end 19.
When the system high pressure P satisfies 2.0MPa < P ≤ 2.8MPa, the refrigerant pushes the second slider 2 to move, the fourth orifice 13 and the fifth orifice 14 on the second valve core 8 are simultaneously opened, and the refrigerant enters the second medium flow passage 22 from the second end 20 of the passage 9 through the fourth orifice 13 and the fifth orifice 14, passes through the second filter screen 5, and finally flows out from the first end 19.
When the system high-pressure P satisfies P > 2.8MPa, the refrigerant pushes the second slider 2 to move, the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15 on the second valve core 8 are opened, the refrigerant enters the second medium flow passage 22 from the second end 20 of the passage 9 through the fourth orifice 13, the fifth orifice 14 and the sixth orifice 15, passes through the second filter screen 5 and finally flows out from the first end 19.
When the system pressure is reduced, the second slider 2 moves towards the second end 20 under the action of the second spring 3, so that the sixth throttle hole 15, the fifth throttle hole 14 and the fourth throttle hole 13 can be closed in sequence, and the second valve element 8 is closed by closing step by step according to the pressure.
The structure for opening the orifice in this embodiment is not limited to the slider sliding manner, nor is the direction of the orifice limited to being perpendicular to the axis of the passage 9. The orifices may also be arranged in a plurality parallel to each other and to the axis of the channel 9.
The throttling regulation method of the invention regulates the throttle hole on the valve core to open according to the characteristics of the refrigerant and different pressures of the system, thereby reducing the pressure of the system and improving the capacity of the system under high temperature and high pressure. Meanwhile, the single characteristic of the original throttle valve can be changed, and the problem that the system cannot be refrigerated due to frequent protection under high-temperature, low-pressure or severe working conditions is solved. The number of the orifices on the valve core is not limited to 3, and the orifices can be arranged according to the requirement, so that multi-stage adjustment can be realized, and the sizes among the orifices can also be arranged according to the requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A throttling device comprising a housing and a passage (9) enclosed by the housing and adapted to medium flow, characterized in that a valve body assembly is arranged in the passage (9), the valve body assembly comprising a valve element and a valve cooperating with the valve element, the valve element being provided with a plurality of orifices adapted to medium flow, the valve being adapted to move to open or close at least one of the orifices, an elastic element being arranged in the passage, the valve being adapted to overcome an elastic force of the elastic element upon an increase of medium pressure in the passage to move in the direction of the passage, the valve body assembly comprising a first valve body assembly (17) and a second valve body assembly (18), the first valve body assembly (17) and the second valve body assembly (18) being arranged in series in the direction of the passage, the medium in the passage (9) being adapted to flow in a first direction through the first valve body assembly (17) and through the second valve body assembly (18) A flow passage between the housings, the medium in the passage (9) being adapted to flow through the flow passage between the second valve body assembly (18) and the housings via the second valve body assembly (18) in a direction opposite to the first direction, the valve (6) of the first valve body assembly (17) being juxtaposed with the spool (4) of the first valve body assembly (17), the valve (2) of the second valve body assembly (18) being juxtaposed with the spool (8) of the second valve body assembly (18) perpendicular to the direction of the passage; in the channel direction, the valve core (4) of the first valve body assembly (17) is located at the adjacent position of the valve (2) of the second valve body assembly (18), and the valve core (8) of the second valve body assembly (18) is located at the adjacent position of the valve (6) of the first valve body assembly (17).
2. The throttle device of claim 1, wherein the valve element is fixedly disposed on an inner wall of the housing and extends in a channel direction; the valve is a slider adapted to move in the direction of the channel to open or close at least one of the orifices.
3. A flow restriction device according to claim 2, wherein one end of the resilient member is axially fixed to the housing and the other end is fixedly connected to the valve.
4. A flow restriction device according to claim 3, wherein the valve body assembly further comprises a limit slide extending in the direction of the passage, the valve and the elastic element being disposed in the limit slide.
5. A flow restriction device according to claim 3, characterized in that the resilient element is a helical spring.
6. The throttle device of claim 1, wherein the resilient element comprises a first resilient element and a second resilient element; one end of the first elastic element (7) is fixedly connected to the valve core of the second valve body assembly (18), and the other end of the first elastic element is fixedly connected to the valve (6) matched with the valve core of the first valve body assembly (17); one end of the second elastic element (3) is fixedly connected to the valve core of the first valve body assembly (17), and the other end of the second elastic element is fixedly connected to the valve (2) matched with the valve core of the second valve body assembly (18).
7. Throttling device according to any one of claims 1-6, c h a r a c t e r i z e d in that the valve body assembly is provided with a filter screen on at least one side in the direction of the passage.
8. A flow restriction device according to claim 7, wherein the filter screen is conical with its central axis aligned with the direction of the passage and its radius increasing in the direction of the medium flow until it contacts the valve body assembly.
9. An air conditioner characterized in that it comprises a throttling device according to any one of the preceding claims 1-8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270458.3A CN111102769B (en) | 2018-10-29 | 2018-10-29 | Throttling device and air conditioner |
| PCT/CN2019/113987 WO2020088447A1 (en) | 2018-10-29 | 2019-10-29 | Throttling apparatus and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270458.3A CN111102769B (en) | 2018-10-29 | 2018-10-29 | Throttling device and air conditioner |
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| Publication Number | Publication Date |
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| CN111102769A CN111102769A (en) | 2020-05-05 |
| CN111102769B true CN111102769B (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811270458.3A Active CN111102769B (en) | 2018-10-29 | 2018-10-29 | Throttling device and air conditioner |
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| CN (1) | CN111102769B (en) |
| WO (1) | WO2020088447A1 (en) |
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| CN113898761B (en) * | 2021-09-15 | 2023-11-17 | 厦门水诚科技有限公司 | Multi-waterway valve core |
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| US6374624B1 (en) * | 2000-03-08 | 2002-04-23 | Ranco Incorporated | On/off solenoid expansion device |
| US6378328B1 (en) * | 2000-04-24 | 2002-04-30 | Ranco Incorporated | Blow-off orifice tube |
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| CN100404925C (en) * | 2004-05-17 | 2008-07-23 | 株式会社不二工机 | Expansion valve |
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| CN203274378U (en) * | 2013-04-27 | 2013-11-06 | 温岭市恒发空调部件有限公司 | Bidirectional circulation expansion valve |
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- 2019-10-29 WO PCT/CN2019/113987 patent/WO2020088447A1/en active Application Filing
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| CN202420050U (en) * | 2012-01-17 | 2012-09-05 | 新昌县富士精工科技有限公司 | Bidirectional throttle valve for air conditioner |
| CN102878733A (en) * | 2012-10-26 | 2013-01-16 | 温岭市恒发空调部件有限公司 | Expansion valve components, one-way expansion valve and two-way circulation expansion valve |
| CN205654901U (en) * | 2016-05-09 | 2016-10-19 | 河南金泉新能源股份有限公司 | Choke valve of accurate regulated flow of ability |
| CN107270594A (en) * | 2017-07-18 | 2017-10-20 | 海信科龙电器股份有限公司 | A kind of restriction sleeve and air conditioner |
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| Publication number | Publication date |
|---|---|
| WO2020088447A1 (en) | 2020-05-07 |
| CN111102769A (en) | 2020-05-05 |
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