Throttle valve, air conditioner outdoor unit and air conditioner

Abstract

The present invention discloses a throttle valve, an air conditioner outdoor unit and an air conditioner, wherein the throttle valve includes a valve seat and a valve core, the valve seat has a first supply and discharge port, a mounting cavity and a second supply and discharge port connected in sequence, and a throttling overflow hole connected to the mounting cavity is opened on the cavity wall of the mounting cavity; the valve core is arranged in the mounting cavity, and the valve core has a first inlet and outlet, a throttling channel and a second inlet and outlet connected in sequence, and the first inlet and outlet and the second inlet and outlet are respectively arranged corresponding to the first supply and discharge port and the second supply and discharge port; wherein the valve core has a throttling position, and in the throttling position, the fluid can enter the mounting cavity through the first supply and discharge port and the throttling overflow hole before entering the throttling channel through the first inlet and outlet, and mix in the mounting cavity. The above-mentioned throttle valve can realize the silent flow of the fluid when the fluid is throttled by the throttle valve.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a throttle valve, an air conditioning outdoor unit and an air conditioner. Background Art

[0002] In the related art, the refrigerant output by the condenser or evaporator is likely to be in a gas-liquid two-phase state, and when the gas-liquid two-phase refrigerant passes through the throttle valve, it is likely to produce discontinuous refrigerant abnormal noise before and after throttling. Summary of the invention

[0003] The main purpose of the present invention is to provide a throttle valve, which is intended to reduce the abnormal noise of the refrigerant generated during the throttling process.

[0004] To achieve the above object, the throttle valve proposed by the present invention comprises:

[0005] A valve seat having a first supply and discharge port, a mounting cavity and a second supply and discharge port which are connected in sequence, wherein a throttling overflow hole which is connected to the mounting cavity is provided on the cavity wall of the mounting cavity; and

[0006] A valve core is arranged in the installation cavity, the valve core has a first inlet and outlet, a throttling channel and a second inlet and outlet which are connected in sequence, the first inlet and outlet and the second inlet and outlet are respectively arranged corresponding to the first supply and discharge port and the second supply and discharge port;

[0007] Wherein, the valve core has a throttling position, in which the fluid can enter the installation cavity through the first supply and discharge port and the throttling overflow hole before entering the throttling channel through the first inlet and outlet, and be mixed in the installation cavity.

[0008] In one embodiment, at the throttling position, a guide channel is formed between the outer wall of the valve core and the inner wall of the installation cavity, and the guide channel connects the throttling overflow hole and the installation cavity.

[0009] In one embodiment, the width of the guide channel gradually increases in a direction from the second inlet to the first inlet.

[0010] In one embodiment, on the flow path of the fluid, the inner wall of the throttling overflow hole includes a first inner wall and a second inner wall arranged at intervals;

[0011] At the throttling position, the end surface where the first inlet and outlet are located is located between the first inner wall and the second inner wall.

[0012] In one embodiment, the first inner wall is closer to the first supply and discharge port than the second inner wall;

[0013] At the throttling position, the end surface where the first inlet and outlet are located is closer to the first inner wall.

[0014] In one embodiment, the end of the valve core close to the first inlet and outlet has an outer cone surface, and a guide channel is formed between the outer cone surface and the inner wall of the installation cavity, and the guide channel connects the throttling overflow hole and the installation cavity, wherein the distance between the outer cone surface and the inner wall of the installation cavity gradually increases.

[0015] In one embodiment, the diameter of the throttling overflow hole is 1.0-2.5 mm.

[0016] In one embodiment, there are a plurality of throttling overflow holes, and the plurality of throttling overflow holes are arranged at intervals along the circumference of the mounting cavity.

[0017] In one embodiment, the valve core also has a non-throttling position. In the non-throttling position, after the fluid enters the installation cavity through the second supply and discharge port, it can be discharged to the outside of the valve seat through the throttling overflow hole and discharged to the outside of the valve seat from the first supply and discharge port after passing through the valve core.

[0018] In one embodiment, the valve core further has a non-throttling position, in which the throttling overflow hole is closed.

[0019] In one embodiment, in the non-throttling position, the valve core closes the throttling overflow hole.

[0020] In one embodiment, a non-throttling overflow hole communicating with the installation cavity is further provided on the cavity wall of the installation cavity;

[0021] In the throttling position, the valve core closes the non-throttling overflow hole;

[0022] In the non-throttling position, after the fluid enters the installation cavity through the second supply and discharge port, it can be discharged to the outside of the valve seat through the non-throttling overflow hole and discharged to the outside of the valve seat from the first supply and discharge port after passing through the valve core.

[0023] In one embodiment, on the flow path of the fluid, the throttling overflow hole is closer to the first supply and discharge port than the non-throttling overflow hole;

[0024] The valve core is movably arranged in the installation cavity, and the flow pressure provided by the reverse-flowing fluid can switch the throttling position and the non-throttling position.

[0025] In one embodiment, the diameter of the throttling overflow hole is the same as the diameter of the non-throttling overflow hole.

[0026] In one embodiment, the number of the throttling overflow holes is the same as the number of the non-throttling overflow holes, and they are arranged in a one-to-one correspondence.

[0027] In one embodiment, the valve seat further has a first limiting cavity communicating with the first supply and discharge port and the installation cavity;

[0028] The throttle valve further includes a retaining ring, and the retaining ring is arranged in the first limiting cavity;

[0029] In the throttling position, the valve core is located outside the retaining ring;

[0030] In the non-throttling position, the valve core is confined within the retaining ring.

[0031] In one embodiment, the valve core has an outer conical surface, and the retaining ring has an inner conical surface matching the outer conical surface.

[0032] In one embodiment, the valve seat further has a second limiting cavity communicating with the installation cavity and the second supply and discharge port;

[0033] In the throttling position, the valve core is limited in the second limiting cavity;

[0034] In the non-throttling position, the valve core is located outside the second limiting cavity.

[0035] In one embodiment, the throttle valve further comprises a valve body, wherein the valve body has a first flow port, a fluid channel and a second flow port which are connected in sequence;

[0036] The valve seat is arranged on the valve body, the first supply and discharge port and the second supply and discharge port are respectively arranged corresponding to the first flow port and the second flow port, a fluid passage is formed between the cavity wall of the installation cavity and the inner wall of the fluid channel, and in the throttling position, the throttling overflow hole connects the fluid passage and the installation cavity.

[0037] In one embodiment, the throttle valve further includes a first filter and a second filter disposed in the fluid channel, wherein the first filter is located between the first flow port and the first supply and discharge port, and the second filter is located between the second flow port and the second supply and discharge port.

[0038] The present invention also provides an air-conditioning outdoor unit, comprising the above-mentioned throttle valve.

[0039] The present invention also provides an air conditioner, comprising the throttle valve mentioned above.

[0040] In the above throttle valve, in the throttle position, the fluid can enter the installation cavity through the first supply and discharge port and the throttle overflow hole before entering the throttle channel through the first inlet and outlet, and mix in the installation cavity. That is, when the valve core is in the throttle position, the fluid can enter the installation cavity through the first supply and discharge port and the throttle overflow hole. The fluid entering the installation cavity through the first supply and discharge port and the throttle overflow hole is mixed in the installation cavity first, and then enters the throttle channel through the first inlet and outlet.

[0041] Before the fluid is throttled, that is, before the fluid enters the throttling channel through the first inlet and outlet, it is mixed in the installation cavity first, which can improve the mixing degree of the gas-liquid two-phase fluid in the throttling valve, making the gas-liquid two-phase fluid mix more evenly, thereby improving the abnormal sound of the fluid flow before throttling, and then improving the fluid flow state after throttling (that is, after the fluid is discharged from the throttling channel through the second inlet and outlet), making the fluid flow tend to be stable, optimizing the experience of abnormal sound of the fluid flow, avoiding discontinuous abnormal sound of the fluid before and after throttling, and achieving the quiet flow of the fluid when the fluid passes through the throttling valve. That is, the above-mentioned throttle valve improves the fluid flow channel of the throttle valve by adding a throttling overflow hole, so that the gas-liquid two-phase fluid can be mixed evenly before throttling, thereby improving the abnormal sound of the fluid flow before and after throttling, avoiding discontinuous abnormal sound of the fluid before and after throttling, and achieving the quiet flow of the fluid when the fluid passes through the throttling valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0043] Figure 1 A schematic top view of a throttle valve according to an embodiment of the present invention;

[0044] Figure 2 for Figure 1 The cross-sectional structure diagram of the throttle valve shown in the throttling working mode;

[0045] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0046] Figure 4 It is a schematic diagram of fluid flow of a traditional throttle valve in a throttling working mode;

[0047] Figure 5 for Figure 1 The fluid flow diagram of the throttle valve in the throttling working mode shown;

[0048] Figure 6 for Figure 1 The cross-sectional structure diagram of the throttle valve in the non-throttling working mode is shown;

[0049] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0050] Description of Figure Numbers:

[0051]

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The invention provides a throttle valve.

[0057] In the embodiment of the present invention, Figure 1-Figure 3 As shown, the throttle valve 10 includes a valve seat 200 and a valve core 300 .

[0058] The valve seat 200 has a first supply and discharge port 210, a mounting cavity 220 and a second supply and discharge port 230 which are connected in sequence. A throttling overflow hole 240 which is connected to the mounting cavity 220 is provided on the cavity wall of the mounting cavity 220.

[0059] The valve core 300 is disposed in the installation cavity 220. The valve core 300 has a first inlet and outlet 310, a throttling channel 320 and a second inlet and outlet 330 which are connected in sequence. The first inlet and outlet 310 and the second inlet and outlet 330 are disposed corresponding to the first supply and discharge port 210 and the second supply and discharge port 230 respectively.

[0060] Among them, Figure 1-Figure 3 As shown, the valve core 300 has a throttling position, that is, the throttle valve 10 has a throttling working mode. In the throttling position, the fluid can enter the installation cavity 220 through the first supply and discharge port 210 and the throttling overflow hole 240 before entering the throttling channel 320 through the first inlet and outlet 310, and mix in the installation cavity 220. That is, when the valve core 300 is in the throttling position, the fluid can enter the installation cavity 220 through the first supply and discharge port 210 and the throttling overflow hole 240, and the fluid entering the installation cavity 220 through the first supply and discharge port 210 and the throttling overflow hole 240 is first mixed in the installation cavity 220, and then enters the throttling channel 320 through the first inlet and outlet 310.

[0061] Before the fluid is throttled, that is, before the fluid enters the throttling channel 320 through the first inlet and outlet 310, it is first mixed in the installation cavity 220, which can improve the mixing degree of the gas-liquid two-phase fluid in the flow throttling valve 10, making the gas-liquid two-phase fluid mix more evenly, thereby improving the abnormal sound of the fluid flow before throttling, and further improving the fluid flow state after throttling (that is, after the fluid is discharged from the throttling channel 320 through the second inlet and outlet 330), making the fluid flow tend to be stable, optimizing the experience of fluid flow abnormal sound, avoiding discontinuous fluid abnormal sound before and after throttling, and achieving silent fluid flow when the fluid passes through the throttle valve 10 for throttling. That is, the above-mentioned throttle valve 10 improves the fluid flow channel of the throttle valve 10 by adding a throttling overflow hole 240, so that the gas-liquid two-phase fluid can be evenly mixed before throttling, thereby improving the abnormal sound of the fluid flow before and after the throttling of the fluid, avoiding discontinuous abnormal sound of the fluid before and after the throttling of the fluid, and achieving silent fluid flow when the fluid passes through the throttle valve 10 for throttling.

[0062] like Figure 4 and Figure 5 As shown, Figure 4 It is a schematic diagram of fluid flow of a traditional throttle valve in throttling working mode. Figure 5 FIG. 1 is a schematic diagram of the fluid flow of the throttle valve 10 in the throttling working mode. Figure 4 and Figure 5 It can be seen that Figure 5 The fluid shown has an obvious mixing process in front of the first inlet and outlet 310 before entering the throttling passage 320 through the first inlet and outlet 310 .

[0063] In this embodiment, in the throttling position, a guide channel 400 is formed between the outer wall of the valve core 300 and the inner wall of the installation cavity 220, and the guide channel 400 connects the throttling overflow hole 240 and the installation cavity 220. In this way, the fluid can move between the first inlet and outlet 310 and the first supply and discharge port 210 through the guide channel 400, which is more conducive to uniform mixing of the fluid.

[0064] In this embodiment, on the flow path of the fluid, the inner wall of the throttling overflow hole 240 includes a first inner wall 242 and a second inner wall 244 arranged at intervals, and the first inner wall 242 is closer to the first supply and discharge port 210 relative to the second inner wall 244. In the throttling position, the end face where the first inlet and outlet 310 is located is located between the first inner wall 242 and the second inner wall 244. In this way, the guide channel 400 can be formed, and the valve core 300 can be prevented from completely blocking the throttling overflow hole 240 due to the end face where the first inlet and outlet 310 is protruding outside the first inner wall 242 (because the end face where the first inlet and outlet 310 is located is closer to the first supply and discharge port 210 relative to the first inner wall 242), thereby preventing the fluid outflow resistance of the throttling overflow hole 240 from being too large. It can be understood that when the second inner wall 244 is closer to the first supply and discharge port 210 relative to the end face where the first inlet and outlet 310 is located, it can be considered that the guide channel 400 is omitted.

[0065] In this embodiment, at the throttling position, the end surface of the first inlet and outlet 310 is closer to the first inner wall 242, that is, the distance between the end surface of the first inlet and outlet 310 and the first inner wall 242 is smaller than the distance between the end surface of the first inlet and outlet 310 and the second inner wall 244. In this way, the guide channel 400 can be made longer, which is more conducive to uniform mixing of the fluid.

[0066] In this embodiment, the width of the flow guiding channel 400 gradually increases in the direction from the second inlet and outlet 330 to the first inlet and outlet 310, so as to facilitate uniform mixing of the fluid.

[0067] In this embodiment, the end of the valve core 300 close to the first inlet and outlet 310 has an outer conical surface 302, and a flow guide channel 400 is formed between the outer conical surface 302 and the inner wall of the installation cavity 220. In the direction from the second inlet and outlet 330 to the first inlet and outlet 310, the distance between the outer conical surface 302 and the inner wall of the installation cavity 220 gradually increases.

[0068] In this embodiment, the diameter of the throttling overflow hole 240 is 1.0-2.5 mm. If the diameter of the throttling overflow hole 240 is too small, the flow resistance of the fluid entering the installation cavity 220 through the throttling overflow hole 240 will be too large, and if the diameter of the throttling overflow hole 240 is too large, the flow resistance of the fluid entering the installation cavity 220 through the throttling overflow hole 240 will be too small, and if the diameter of the throttling overflow hole 240 is too large, it will also affect the structural strength of the valve core 300. Taking the above factors into consideration, the diameter of the throttling overflow hole 240 is set to 1.0-2.5 mm.

[0069] In this embodiment, there are multiple throttling overflow holes 240, and the multiple throttling overflow holes 240 are arranged at intervals along the circumference of the installation cavity 220. In this way, it is more conducive to the fluid entering the installation cavity 220 through the first supply and discharge port 210 and the throttling overflow holes 240 to be evenly mixed in the installation cavity 220. In this embodiment, the multiple throttling overflow holes 240 are arranged at equal intervals along the circumference of the installation cavity 220. In this embodiment, there are two throttling overflow holes 240.

[0070] In this embodiment, if Figure 6 and Figure 7 As shown, the valve core 300 also has a non-throttling position, that is, the throttle valve 10 has a non-throttling working mode. The valve core 300 can switch between the throttling position and the non-throttling position. It can be understood that in the throttling working mode, the output flow of the throttle valve 10 is small, and in the throttling working mode, the output flow of the throttle valve 10 is large.

[0071] In this embodiment, in the non-throttling position, the throttling overflow hole 240 is closed, so that the throttling overflow hole 240 can be prevented from interfering with the non-throttling working mode of the throttle valve 10 .

[0072] In this embodiment, in the non-throttling position, the valve core 300 closes the throttling overflow hole 240. In this way, when the valve core 300 is moved so that the valve core 300 switches from the throttling position to the non-throttling position, the throttling overflow hole 240 can be closed. It can be understood that in other embodiments, a throttling closing structure for closing the throttling overflow hole 240 can also be additionally provided. In this case, in the non-throttling position, the valve core 300 may not close the throttling overflow hole 240.

[0073] In this embodiment, a non-throttling overflow hole 250 communicating with the mounting cavity 220 is further provided on the cavity wall of the mounting cavity 220. In the non-throttling position, after the fluid enters the mounting cavity 220 through the second supply and discharge port 230, it can be discharged to the outside of the valve seat 200 through the non-throttling overflow hole 250 and discharged to the outside of the valve seat 200 from the first supply and discharge port 210 after passing through the valve core 300. That is, in the non-throttling position, after the fluid enters the mounting cavity 220 through the second supply and discharge port 230, part of the fluid is directly discharged to the outside of the valve seat 200 through the non-throttling overflow hole 250, and part of the fluid is discharged to the outside of the valve seat 200 from the first supply and discharge port 210 after passing through the second inlet and outlet 330, the throttling channel 320 and the first inlet and outlet 310 in sequence. That is, by adding the non-throttling overflow hole 250, the throttle valve 10 has a larger output flow rate, so that the throttle valve 10 has a non-throttling working mode.

[0074] In the present embodiment, in the throttling position, the throttling overflow hole 240 is in an open state, and the valve core 300 closes the non-throttling overflow hole 250. In the non-throttling position, the non-throttling overflow hole 250 is in an open state, and the valve core 300 closes the throttling overflow hole 240. In this way, the non-throttling overflow hole 250 can be prevented from interfering with the throttling working mode of the throttling valve 10, and the throttling overflow hole 240 can be prevented from interfering with the non-throttling working mode of the throttling valve 10. It can be understood that in other embodiments, a non-throttling closed structure for closing the non-throttling overflow hole 250 can also be additionally provided, and in this case, the valve core 300 may not close the non-throttling overflow hole 250 in the throttling position. Similarly, a throttling closed structure for closing the throttling overflow hole 240 can also be additionally provided, and in this case, the valve core 300 may not close the throttling overflow hole 240 in the non-throttling position.

[0075] In this embodiment, a throttling overflow hole 240 and a non-throttling overflow hole 250 are provided at the same time, and on the flow path of the fluid, there is a difference in the front and rear positions between the throttling overflow hole 240 and the non-throttling overflow hole 250, that is, on the flow path of the fluid, the throttling overflow hole 240 is closer to the first supply and discharge port 210 relative to the non-throttling overflow hole 250. In this way, the switching between the throttling position and the non-throttling position can be achieved by controlling the valve core 300 to move on the flow path of the fluid, which is very convenient for achieving the switching between the throttling position and the non-throttling position. It can be understood that in other embodiments, the valve core 300 may not move on the flow path of the fluid, but move in other directions, so as to achieve the switching between the throttling position and the non-throttling position.

[0076] In this embodiment, the valve core 300 is movably disposed in the installation cavity 220. In the throttling working mode, the fluid flows along Figure 2 In the direction of the arrow shown in FIG. 1 , the valve core 300 is stably in the throttling position under the flow pressure of the fluid; in the non-throttling mode, the flow path of the fluid is reversed, along Figure 6The fluid flows in the direction of the arrow shown in FIG. 1 , and under the flow pressure of the fluid, the valve core 300 moves from the throttling position to the non-throttling position and remains stably in the non-throttling position. That is, in this embodiment, the switching between the throttling position and the non-throttling position can be achieved by the flow pressure provided by the reversely flowing fluid. It is understood that in other embodiments, the switching between the throttling position and the non-throttling position can also be achieved by setting an additional moving mechanism and moving the valve core 300 through the moving mechanism.

[0077] In other embodiments, in the non-throttling position, when the fluid enters the installation cavity 220 through the second supply and discharge port 230, it can be discharged to the outside of the valve seat 200 through the throttling overflow hole 240 and discharged to the outside of the valve seat 200 from the first supply and discharge port 210 after passing through the valve core 300, the throttling valve 10 can also have a large output flow rate, so that the throttling valve 10 has a non-throttling working mode. At this time, the non-throttling overflow hole 250 can be omitted. Moreover, at this time, in the non-throttling position, the throttling overflow hole 240 is not closed.

[0078] In this embodiment, the diameter of the non-throttling overflow hole 250 is 1.0-2.5 mm. If the diameter of the non-throttling overflow hole 250 is too small, the flow resistance of the fluid discharged to the outside of the valve seat 200 through the non-throttling overflow hole 250 will be too large, while if the diameter of the non-throttling overflow hole 250 is too large, the flow resistance of the fluid discharged to the outside of the valve seat 200 through the non-throttling overflow hole 250 will be too small, and if the diameter of the non-throttling overflow hole 250 is too large, it will also affect the structural strength of the valve core 300. Taking the above factors into consideration, the diameter of the non-throttling overflow hole 250 is set to 1.0-2.5 mm.

[0079] In this embodiment, the diameter of the throttling overflow hole 240 is the same as the diameter of the non-throttling overflow hole 250. In this way, it is more convenient to close or open the throttling overflow hole 240 and the non-throttling overflow hole 250, and it is more convenient to manufacture the valve core 300.

[0080] In this embodiment, there are multiple non-throttling overflow holes 250, and the multiple non-throttling overflow holes 250 are arranged at intervals along the circumference of the installation cavity 220. In this way, it is more conducive to the fluid to be discharged to the outside of the valve seat 200 through the non-throttling overflow holes 250. In this embodiment, the multiple non-throttling overflow holes 250 are arranged at equal intervals along the circumference of the installation cavity 220. In this embodiment, there are two non-throttling overflow holes 250.

[0081] In this embodiment, the number of the throttling overflow holes 240 is the same as the number of the non-throttling overflow holes 250, and they are arranged one by one. In this way, it is more convenient to close or open the throttling overflow holes 240 and the non-throttling overflow holes 250, and it is more convenient to manufacture the valve core 300.

[0082] In this embodiment, the valve seat 200 further has a first limiting cavity 260 that communicates with the first supply and discharge port 210 and the mounting cavity 220. The throttle valve 10 further includes a retaining ring 500, which is disposed in the first limiting cavity 260. In the throttle position, the valve core 300 is located outside the retaining ring 500; in the non-throttle position, the valve core 300 is limited in the retaining ring 500. In this way, the valve core 300 can be prevented from sliding out of the valve seat 200 from the first supply and discharge port 210 in the non-throttle position.

[0083] In this embodiment, the retaining ring 500 has an inner conical surface 502 that matches the outer conical surface 302. In this way, it is very convenient to insert the valve core 300 into the retaining ring 500.

[0084] In this embodiment, the valve seat 200 further has a second limiting cavity 270 that communicates with the installation cavity 220 and the second supply and discharge port 230. In the throttling position, the valve core 300 is limited in the second limiting cavity 270. In the non-throttling position, the valve core 300 is located outside the second limiting cavity 270. In this way, it can be avoided that the valve core 300 slides out of the second supply and discharge port 230 to the outside of the valve seat 200 in the throttling position.

[0085] In this embodiment, the throttle valve 10 further includes a valve body 600. The valve body 600 has a first flow port 610, a fluid channel 620 and a second flow port 630 which are connected in sequence.

[0086] The valve seat 200 is arranged on the valve body 600. A fluid passage 700 is formed between the cavity wall of the installation cavity 220 and the inner wall of the fluid channel 620. In the throttling position, the throttling overflow hole 240 connects the fluid passage 700 with the installation cavity 220. The first supply and discharge port 210 is connected with the first flow port 610, and one end of the fluid passage 700 close to the first supply and discharge port 210 is connected with the first flow port 610. In the non-throttling position, the non-throttling overflow hole 250 connects the fluid passage 700 with the installation cavity 220.

[0087] In this embodiment, the throttle valve 10 further includes a first filter screen 800 and a second filter screen 900 disposed in the fluid channel 620. The first filter screen 800 is located between the first flow port 610 and the first supply and discharge port 210. The second filter screen 900 is located between the second flow port 630 and the second supply and discharge port 230. The first filter screen 800 and the second filter screen 900 are provided to effectively prevent impurities in the fluid from clogging the throttling channel 320 with a smaller inner diameter.

[0088] The present invention further provides an air-conditioning outdoor unit, which includes the throttle valve 10 mentioned above.

[0089] The present invention further provides an air conditioner, which includes the throttle valve 10 mentioned above.

[0090] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A throttle valve, characterized in that: include: A valve seat, having a first supply and discharge port, a mounting cavity and a second supply and discharge port connected in sequence, a throttling overflow hole connected to the mounting cavity is opened on the cavity wall of the mounting cavity, and the throttling overflow holes are multiple, and the multiple throttling overflow holes are arranged at intervals along the circumference of the mounting cavity; as well as A valve core is arranged in the installation cavity, the valve core has a first inlet and outlet, a throttling channel and a second inlet and outlet which are connected in sequence, the first inlet and outlet and the second inlet and outlet are respectively arranged corresponding to the first supply and discharge port and the second supply and discharge port; In which, the valve core has a throttling position. At the throttling position, a guide channel is formed between the outer wall of the valve core and the inner wall of the installation cavity. The guide channel connects the throttling overflow hole and the installation cavity. Before the fluid enters the throttling channel through the first inlet and outlet, it can first enter the installation cavity through the first supply and discharge port and the throttling overflow hole and be mixed in the installation cavity.

2. The throttle valve according to claim 1, characterized in that In a direction from the second inlet to the first inlet, the width of the guide channel gradually increases.

3. The throttle valve according to claim 1, characterized in that On the flow path of the fluid, the inner wall of the throttling overflow hole includes a first inner wall and a second inner wall arranged at intervals; At the throttling position, the end surface where the first inlet and outlet are located is located between the first inner wall and the second inner wall.

4. The throttle valve according to claim 3, characterized in that The first inner wall is closer to the first supply and discharge port than the second inner wall; At the throttling position, the end surface where the first inlet and outlet are located is closer to the first inner wall.

5. The throttle valve according to claim 1, characterized in that The end of the valve core close to the first inlet and outlet has an outer cone surface, and a guide channel is formed between the outer cone surface and the inner wall of the installation cavity. The guide channel connects the throttling overflow hole and the installation cavity, wherein the distance between the outer cone surface and the inner wall of the installation cavity gradually increases.

6. The throttle valve according to claim 1, characterized in that The diameter of the throttling overflow hole is 1.0-2.5 mm.

7. The throttle valve according to claim 1, characterized in that The valve core also has a non-throttling position. In the non-throttling position, after the fluid enters the installation cavity through the second supply and discharge port, it can be discharged to the outside of the valve seat through the throttling overflow hole and discharged to the outside of the valve seat from the first supply and discharge port after passing through the valve core.

8. The throttle valve according to claim 1, characterized in that The valve core also has a non-throttling position, in which the throttling overflow hole is closed.

9. The throttle valve according to claim 8, characterized in that In the non-throttling position, the valve core closes the throttling overflow hole.

10. The throttle valve according to claim 9, characterized in that The cavity wall of the installation cavity is also provided with a non-throttling overflow hole communicating with the installation cavity; In the throttling position, the valve core closes the non-throttling overflow hole; In the non-throttling position, after the fluid enters the installation cavity through the second supply and discharge port, it can be discharged to the outside of the valve seat through the non-throttling overflow hole and discharged to the outside of the valve seat from the first supply and discharge port after passing through the valve core.

11. The throttle valve according to claim 10, characterized in that On the flow path of the fluid, the throttling overflow hole is closer to the first supply and discharge port than the non-throttling overflow hole; The valve core is movably arranged in the installation cavity, and the flow pressure provided by the reverse-flowing fluid can switch the throttling position and the non-throttling position.

12. The throttle valve according to claim 10, characterized in that The diameter of the throttling overflow hole is the same as the diameter of the non-throttling overflow hole.

13. The throttle valve according to claim 10, characterized in that The number of the throttling overflow holes is the same as the number of the non-throttling overflow holes, and they are arranged in a one-to-one correspondence.

14. The throttle valve according to claim 8, characterized in that The valve seat also has a first limiting cavity communicating with the first supply and discharge port and the installation cavity; The throttle valve further includes a retaining ring, and the retaining ring is arranged in the first limiting cavity; In the throttling position, the valve core is located outside the retaining ring; In the non-throttling position, the valve core is confined within the retaining ring.

15. The throttle valve according to claim 14, characterized in that The valve core has an outer conical surface, and the retaining ring has an inner conical surface matched with the outer conical surface.

16. The throttle valve according to claim 8, characterized in that The valve seat also has a second limiting cavity communicating with the installation cavity and the second supply and discharge port; In the throttling position, the valve core is limited in the second limiting cavity; In the non-throttling position, the valve core is located outside the second limiting cavity.

17. The throttle valve according to claim 1, characterized in that The throttle valve further comprises a valve body, wherein the valve body has a first flow port, a fluid channel and a second flow port which are connected in sequence; The valve seat is arranged on the valve body, the first supply and discharge port and the second supply and discharge port are respectively arranged corresponding to the first flow port and the second flow port, a fluid passage is formed between the cavity wall of the installation cavity and the inner wall of the fluid channel, and in the throttling position, the throttling overflow hole connects the fluid passage and the installation cavity.

18. The throttle valve according to claim 17, characterized in that The throttle valve further includes a first filter screen and a second filter screen disposed in the fluid channel, wherein the first filter screen is located between the first flow port and the first supply and discharge port, and the second filter screen is located between the second flow port and the second supply and discharge port.

19. An air conditioner outdoor unit, characterized in that: Comprising a throttle valve as described in any one of claims 1-18.

20. An air conditioner, characterized in that: Comprising a throttle valve as described in any one of claims 1-18.

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