WO2020238507A1

WO2020238507A1 - Bidirectional throttling filter and air conditioner

Info

Publication number: WO2020238507A1
Application number: PCT/CN2020/086540
Authority: WO
Inventors: 胡清波; 陈伟; 李晓阳
Original assignee: 宁波奥克斯电气股份有限公司; 奥克斯空调股份有限公司
Priority date: 2019-05-28
Filing date: 2020-04-24
Publication date: 2020-12-03
Also published as: CN110145902A

Abstract

A bidirectional throttling filter and an air conditioner. The bidirectional throttling filter comprises: a filter main body, the filter main body being of a hollow structure, being provided with openings at both ends, and being provided therein with a filtering component; an outer valve element, which has a hollow structure and is provided in the filter main body; and an inner valve element, which has a hollow structure, is provided in the outer valve element, and can move in the outer valve element. By means of the movement of the inner valve element in the outer valve element, a throttling channel can be formed in the fluid outflowing side, and the inner diameter of the throttling channel is smaller than the inner diameter of the inner valve element. Thus, by means of the movement of the inner valve element in the outer valve element, a throttling channel making the inner space of the inner valve element in communication with the outlet of the filter main body can be formed; the throttling channel achieves throttling effect of a capillary tube; moreover, the integration of the throttling function into the filter saves the mounting space.

Description

Two-way throttling filter and air conditioner

This application claims the priority of Chinese Patent Application No. 201910453957.4 filed on May 28, 2019. The full text of the Chinese patent application is incorporated herein by reference as a part of this application.

Technical field

The embodiment of the present disclosure relates to a two-way throttling filter and an air conditioner.

Background technique

Filters are usually installed on both sides of the electronic expansion valve of the air conditioner to prevent impurities in the system from blocking the electronic expansion valve and causing system failure. In addition, a section of capillary tube is connected after the filter as a throttling device to reduce the pressure difference after throttling of the electronic expansion valve and reduce noise. Due to the limited space of the outdoor unit of the air conditioner, the installation of filters and capillaries on both sides of the electronic expansion valve brings great inconvenience to the design of the space layout of the external unit, and it is difficult to adapt to the development trend of miniaturization of the outdoor unit.

Summary of the invention

In order to solve the above-mentioned problems, embodiments of the present disclosure provide a filter with a bidirectional throttling function, which can replace the throttling function of the capillary tubes connected to the filter devices on both sides of the electronic expansion valve.

According to an aspect of the embodiments of the present disclosure, there is provided a bidirectional throttling filter, including:

A filter body, wherein the filter body is in a hollow structure with openings at both ends, and filtering components are arranged inside;

The outer valve core has a hollow structure and is arranged inside the filter body;

The inner valve core has a hollow structure, is arranged inside the outer valve core and can move inside the outer valve core;

Wherein, by the movement of the inner valve core inside the outer valve core, a throttle passage can be formed on the side where the fluid flows out, and the inner diameter of the throttle passage is smaller than the inner diameter of the inner valve core. Thus, through the movement of the inner spool inside the outer spool, a throttling passage connecting the internal space of the inner spool and the outlet of the filter body can be formed. The throttling passage realizes the throttling effect of the capillary tube and combines the throttling function Into the filter, saving installation space.

Further, the outer diameter of the inner valve core is the same as the inner diameter of the outer valve core, and when the inner valve core moves to a predetermined position of the outer valve core, the side from which the filter fluid flows out forms a communication A throttling passage between the internal space of the inner valve core and the outlet of the filter body. Since the outer diameter of the inner valve core is the same as the inner diameter of the outer valve core, the inner valve core can be moved to a predetermined position to form the only outlet for fluid on the inner valve core and the outer valve core body.

Further, the outer valve core is provided with a first outer throttle passage and a second outer throttle passage for communicating the openings at both ends of the filter body with the inner space of the outer valve core;

The inner valve core is provided with a first inner throttle passage and a second inner throttle passage for communicating the inner space of the inner valve core with the inner space of the outer valve core.

Further, when the inner valve core moves to the end of a stroke of one side, the first outer throttle passage on the outer valve core communicates with the first inner throttle passage on the inner valve core, Or the second outer throttle passage on the outer valve core communicates with the second inner throttle passage on the inner valve core. Thus, through the movement of the inner valve core, the outer throttle passage on the outer valve core can be aligned with the inner throttle passage on the inner valve core to realize the communication between the two to form the throttle passage.

Further, the inner diameters of the first outer throttle passage and the first inner throttle passage are the same; and the inner diameters of the second outer throttle passage and the second inner throttle passage are the same.

Further, the inner diameters of the first outer throttle passage and the first inner throttle passage are a; the inner diameters of the second outer throttle passage and the second inner throttle passage are b, where a≠b. By setting different inner diameters of the throttle channels on both sides, different throttle effects on both sides can be realized.

Further, the filter further includes: a one-way valve plate arranged at both ends of the hollow structure of the inner valve core, so that fluid can only flow into the hollow structure from the outside of the inner valve core.

Wherein, the one-way valve plate includes a shaft penetrating the middle part and at least one valve plate plate, and the valve plate plate can only rotate inside the inner valve core around the axial direction. Thus, the one-way valve plate can be opened and closed by rotating the valve plate around the central axis. When the fluid flows from the outside to the inner valve core, the semicircular valve plate is pushed to rotate inwardly around the axis. The valve disc is in an open state; when fluid flows outward from the inner valve core, because the semicircular valve disc plate and the inner valve core edge bulge against each other, it cannot rotate outside the axis, and the one-way valve disc is in the closed state.

Further, the filter further includes: a limit table, which is provided at the openings at both ends of the outer valve core, and is used to limit the movement of the inner valve core. Thus, the end point of the inner spool stroke can be restricted by the limiter.

Further, the limit station includes:

The fixing part is arranged at the openings at both ends of the outer valve core, and its diameter is the same as that of the openings at both ends of the outer valve core;

The connecting part is arranged on the fixed part and protrudes toward the inner valve core inside the outer valve core;

A limiting portion, the diameter of the limiting portion is larger than the inner diameter of the inner valve core;

The through hole is arranged on the fixing part and communicates the internal space of the outer valve core with the opening of the filter body.

Further, when the inner valve core moves into contact with the limiting platform, a throttle channel is formed on the side close to the limiting platform. Due to the effect of the one-way valve discs provided on both sides of the inner valve core, the fluid will push the inner valve core to move to contact with the limit table in the direction of the outlet. At this time, a throttle channel is formed on the side of the outlet.

Further, the filter device is a filter screen, which is arranged inside the filter body on both sides of the outer valve core.

Further, the middle of the filter body is a first cylindrical portion, two ends are provided with second cylindrical portions as inlets and outlets, and the connecting portion between the first cylindrical portion and the second cylindrical portion is a tapered portion , Wherein the diameter of the first cylindrical portion is larger than the second cylindrical portion, and the filter is provided with the tapered portion or the first cylindrical portion, so as to ensure that the area of the filter is large enough to be effective filter.

According to another aspect of the embodiments of the present disclosure, there is provided an air conditioner including the filter as described above.

Description of the drawings

Fig. 1 is a schematic structural diagram of a bidirectional throttling filter according to an embodiment of the present disclosure;

Figure 2a is a schematic front view of a one-way valve disc according to an embodiment of the present disclosure;

Figure 2b is a schematic side view of a one-way valve disc according to an embodiment of the present disclosure;

Fig. 3a is a schematic diagram of a side structure of a limit table according to an embodiment of the present disclosure;

FIG. 3b is a schematic diagram of the front structure of a limit table according to an embodiment of the present disclosure;

4a is a schematic diagram of the front structure of a filter screen according to an embodiment of the present disclosure;

Fig. 4b is a schematic side view of a filter screen according to an embodiment of the present disclosure.

Description of reference signs:

1- filter body, 2- outer valve core, 3- inner valve core, 4- one-way valve disc, 5- limit table, 6-filter mesh, 101-first cylinder part, 102-second cylinder Section, 103-cone section, 401-first check valve plate, 402-second check valve plate, 410-shaft, 420-valve plate, 421-first valve plate, 422-first valve plate Plate, 501- first limit table, 502- second limit table, 5001- fixed part, 5002- connection part, 5003- limit part, 5004- through hole, 601- first filter, 602- second Filter sheet.

Detailed ways

It is known that filters are usually installed on both sides of the electronic expansion valve of air conditioners. A section of capillary tube is connected after the filter as a throttling device to reduce the pressure difference after throttling of the electronic expansion valve and reduce noise. However, the capillary tube needs to be connected. The installation space is large, which causes inconvenience in the design of the external machine space layout. If the throttling function of the capillary tube can be directly realized through the filter, the installation space can be effectively saved.

The embodiment of the present disclosure provides a two-way throttling filter, which mainly includes a filter body, an inner valve core and an outer valve core, a one-way valve plate, and a limit table. Among them, the filter body is a hollow structure with openings at both ends, and filtering components are arranged inside; the outer valve core is a hollow structure and is arranged inside the filter body; the inner valve core is arranged inside the outer valve core and can be inside the outer valve core Move; one-way valve discs are arranged at both ends of the hollow structure of the inner spool, so that fluid can only flow into the hollow structure from the outside of the inner spool; the limit table is set at the openings at both ends of the outer spool for the Move to limit.

When the fluid enters through the filter opening, due to the effect of the one-way valve discs on both sides of the inner spool, the fluid will push the inner spool to move to contact with the limit table in the direction of the outlet, and the stroke of the inner spool will reach the end point. The outlet side forms a throttle channel. The inner diameter of the throttle channel is smaller than the inner diameter of the inner valve core, which realizes the throttling effect of the capillary tube.

Specifically, the throttle passage is composed of two parts, the outer valve core is provided with a first outer throttle passage and a second outer throttle passage, and the inner valve core is provided with a first inner throttle passage and a second inner throttle passage . When the inner valve core moves to the end of the stroke on one side, the first outer throttle passage on the outer valve core communicates with the first inner throttle passage on the inner valve core, and vice versa. Through the movement of the inner valve core, the outer throttle passage on the outer valve core is aligned with the inner throttle passage on the inner valve core to realize the communication between the two, thereby forming the throttle passage. By incorporating the capillary throttling function into the filter, installation space is saved.

In order to make the above objectives, features, and advantages of the present disclosure more obvious and understandable, specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

In the first exemplary embodiment of the present disclosure, a bidirectional throttling filter is provided. Fig. 1 is a schematic diagram of the structure of a bidirectional throttling filter in an embodiment of the disclosure. As shown in Figure 1, the embodiment of the present disclosure has a filter body 1, an outer valve core 2, an inner valve core 3, a one-way valve plate 4, a limit table 5, a filter screen 6, and a first outer valve core on the outer valve core. The throttle passage 7 and the second outer throttle passage 9, the first inner throttle passage 8 and the second inner throttle passage 10 on the inner valve core.

Among them, the filter body 1 is in the shape of a hollow cylinder. Specifically, the filter body 1 has a two-sided symmetrical structure, with a first cylindrical portion 101 in the middle, and a second cylindrical portion 102 at both ends as the inlet and outlet. The connecting portion of the first cylindrical portion and the second cylindrical portion It is the tapered part 103. Among them, the first cylindrical portion 101 and the second cylindrical portion 102 are hollow cylindrical shapes with different diameters, and the tapered portion 103 is a hollow cone shape, thereby combining the first cylindrical portion 101 and the second cylindrical portion with different diameters. 102 are connected to each other.

The outer valve core 2 and the inner valve core 3 arranged inside the filter body 1 are both cylindrical, wherein the outer valve core 2 is sleeved and fixed inside the first cylindrical portion 101 of the filter body 1, and the inner valve core 3 is set inside the outer spool 2 and can move inside the outer spool 2.

The one-way valve plate 4 includes a first one-way valve plate 401 and a second one-way valve plate 402, which are respectively fixed at the openings at both ends of the hollow inner valve core 3 and can be opened one-way; as shown in Figure 1, the first one The one-way valve plate 401 is arranged at the right opening of the inner spool 3, which only allows fluid to flow from right to left; the second one-way valve plate 402 is arranged at the left opening of the inner spool 3, and it only allows fluid to flow from the left Flow to the right.

Fig. 2a is a schematic diagram of the front structure of the check valve disc according to the embodiment of the disclosure; Fig. 2b is a schematic diagram of the side structure of the check valve disc according to the embodiment of the disclosure. As shown in Figures 2a-2b, the one-way valve plate 4 includes a shaft 410 penetrating the middle part and two semicircular valve plates 420. The semicircular valve plate 420 includes a first valve plate 421 and a second valve plate 422. A valve plate 421 and a second valve plate 422 are matched to form a complete circle, which can close the opening of the inner valve core 3. The first valve plate 421 and the second valve plate 422 can rotate around the central shaft 410 to realize the opening and closing of the one-way valve plate 4. When the fluid flows from the outside to the inner valve core 3, the semicircular valve disc 420 is pushed to rotate inwardly around the axis, and the one-way valve disc 4 is in an open state; when the fluid flows outward from the inner valve core 3, the semicircular valve disc The plate 420 abuts against the edge of the inner valve core 3, so it cannot rotate outside the axis, and the one-way valve plate is in the closed state at this time.

The limiting platform 5 includes a first limiting platform 501 and a second limiting platform 502, which are arranged inside the hollow outer valve core 2. Fig. 3a is a schematic diagram of the side structure of the limiting table according to the embodiment of the disclosure. As shown in Fig. 3a, the limiting table 5 includes a fixing portion 5001, a connecting portion 5002 and a limiting portion 5003, wherein the fixing portion 5001 is in the shape of a disc and is arranged The openings at both ends of the outer valve core 2 have the same diameter as the openings at both ends of the outer valve core 2. The fixing portion 5001 has a through hole 5004 that can allow fluid to pass through; FIG. 3b is a schematic diagram of the front structure of the limiting table according to the embodiment of the disclosure. As shown in FIG. 3b, the limiting portion has four through holes 5004. The connecting part 5002 is arranged on the fixed part 5001 and bulges outward in the direction of the inner valve core 3 inside the valve core 2. The connecting part 5002 is provided with a disc-shaped stop part 5003, the diameter of the stop part 5003 is larger than the inner valve The diameter of the opening of the core 3, therefore, when the inner valve core 3 moves inside the outer valve core 2 to come into contact with the limiting part 5, it cannot continue to move, and the inner valve core 3 is limited.

The filter screen 6 includes a first filter screen 601 and a second filter screen 602, which are respectively arranged on both sides of the outer valve core. The inlet and outlet of the filter body 1 are located between the second cylindrical portion 102 and the middle first cylindrical portion 101. The inside of the tapered portion 103. Fig. 4 is a schematic diagram of the structure of the filter screen of the embodiment of the present disclosure. As shown in Fig. 4, the filter screen 6 has meshes to allow fluid to pass through. In other embodiments, the filter screen may also be arranged on the first cylindrical portion 101 and kept out of contact with the outer valve core to prevent the filtering effect from being affected.

The main body of the outer valve core 2 is provided with a first outer throttle passage 7 and a second outer throttle passage 9. The first outer throttle passage 7 and the second outer throttle passage 9 are used to communicate the tapered part and the outer valve core 2 Internal; the body of the inner valve core 3 is provided with a first inner throttle passage 8 and a second inner throttle passage 10, the first inner throttle passage 8 and the second inner throttle passage 10 are used to communicate with the inner valve core 3 Internal and external.

The first outer throttle passage 7 and the first inner throttle passage 8 have the same inner diameter a, and the second outer throttle passage 9 and the second inner throttle passage 10 have the same inner diameter b. When the inner spool 3 moves inside the outer spool 2, when it touches the second limit platform of the outer spool, the position of the second inner throttle passage 10 just corresponds to the position of the second outer throttle passage 9, so that The inner spool 3 communicates with the second tapered portion; when it contacts the first limiting platform of the outer spool, the position of the first inner throttle passage 8 is exactly corresponding to the position of the first outer throttle passage 7, so that The inside of the inner valve core 3 communicates with the first tapered portion.

The working principle of the bidirectional throttling filter in the embodiment of the present disclosure is:

When the fluid enters the first tapered part of the filter from the second cylindrical part on the right, it first passes through the first filter screen 6, and then enters the outer valve core 2 from the through hole on the first stop 5, and passes through The first one-way valve plate 401 that can be opened inward flows to the inner valve core. Since the second one-way valve plate at the other end cannot be opened outwardly, the fluid pushes the inner valve core to move to the left side to contact the second limit table. At the same time, the second inner throttling passage 10 on the left is connected to the second outer throttling passage 9, and the fluid flows out to the left through the second inner throttling passage 10 and the second outer throttling passage 9, and the second inner throttling passage now flows The throttling effect of the passage 10 and the second outer throttling passage 9 is effective.

In the above case, when the fluid flow direction changes from the second cylindrical part on the left into the second tapered part of the filter, it will first pass through the second filter screen 6, and then from the through hole on the second limiter 5. Go inside the outer spool 2. At this time, the inner valve core is in contact with the second limiting platform, and fluid cannot enter the inner valve core, and can only enter the inner valve core from the second outer throttle passage 9 through the second inner throttle passage 10. Due to the action of the first one-way valve plate on the right, the fluid cannot flow out to the right, so the inner valve core is pushed to move to the right to contact the first limit platform on the right. After the inner spool moves to the right and contacts the first limiter, the first inner throttle passage 8 is connected to the first outer throttle passage 7, and the second inner throttle passage 10 and the second outer throttle passage 9 When closed, the fluid flows out from the right side through the first inner throttling passage 8 and the first outer throttling passage 7. At this time, the throttling action of the first inner throttling passage 8 and the first outer throttling passage 7 takes effect.

As an option, by controlling the inner diameter a of the first inner throttle passage 8 and the first outer throttle passage 7 and the inner diameter b of the second inner throttle passage 10 and the second outer throttle passage 9, the forward and reverse directions can be realized. Different throttling effects.

The embodiment of the present disclosure integrates the throttling function of the capillary into the filter, which can realize the functions of filtering and bidirectional throttling to meet the needs of use; at the same time, the filter is saved after the capillary is connected, and only the two ends of the electronic expansion valve are installed The two-way throttling filter is sufficient, so that the volume of the device is further reduced.

In a second exemplary embodiment of the present disclosure, there is provided an air conditioner including the bidirectional throttling filter as described in the first embodiment. By adopting this kind of two-way throttling filter, the layout space of the outdoor unit connected with the capillary tube after the filter is saved, and the volume of the outdoor unit is reduced.

Although the disclosure is as above, the disclosure is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the scope defined by the claims.

Claims

A two-way throttling filter, including:

A filter main body (1), the filter main body (1) has a hollow structure with openings at both ends, and a filter component is arranged inside;

The outer valve core (2) has a hollow structure and is arranged inside the filter body (1);

The inner valve core (3) has a hollow structure and is arranged inside the outer valve core (2);

Wherein, the inner valve core (3) can move inside the outer valve core (2), and a throttling passage is formed on the side where the filter fluid flows out, and the inner diameter of the throttling passage is smaller than that of the inner valve The inner diameter of the core.
The filter according to claim 1, wherein the outer diameter of the inner valve core (3) is the same as the inner diameter of the outer valve core (2), and when the inner valve core (3) moves to the outer When the valve core (2) is at a predetermined position, the side where the filter fluid flows out forms a throttling channel that communicates the internal space of the inner valve core (3) with the outlet of the filter body (1).
The filter according to claim 2, wherein the throttling passage comprises:

The first outer throttle passage (7) and the second outer throttle passage (9) provided on the outer valve core (2) respectively communicate with the openings at both ends of the filter body (1) and the outer valve core (2). ) Internal space;

The first inner throttle passage (8) and the second inner throttle passage (10) provided on the inner valve core (3) respectively communicate with the inner space of the inner valve core (3) and the outer valve core (2) Internal space.
The filter according to claim 3, wherein when the inner spool (3) moves to the end of one side stroke, the first outer throttle passage (7) on the outer spool (2) Communicate with the first inner throttle passage (8) on the inner valve core (3), or the second outer throttle passage (9) on the outer valve core (2) is connected to the inner The second inner throttle passage (10) on the valve core (3) is in communication.
The filter according to claim 3, wherein the inner diameter of the first outer throttling passage (7) and the first inner throttling passage (8) are the same; the second outer throttling passage (9) and the first inner throttling passage (9) The two inner throttle channels (10) have the same inner diameter.
The filter according to claim 5, wherein the inner diameters of the first outer throttling passage (7) and the first inner throttling passage (8) are a; the second outer throttling passage (9) and The inner diameter of the second inner throttle passage (10) is b, where a≠b.
The filter according to claim 2, further comprising:

The one-way valve plate (4) is arranged at both ends of the hollow structure of the inner valve core (3), so that fluid can only flow into the hollow structure from the outside of the inner valve core (3).
The filter according to claim 7, wherein the one-way valve plate (4) includes a shaft (410) penetrating through the middle part and at least one valve plate (420), and the valve plate (420) can only Rotate inside the inner valve core (3) around the shaft (410).
The filter according to claim 2, further comprising:

The limit table (5) is arranged at the openings at both ends of the outer valve core (2) and is used to limit the movement of the inner valve core (3).
The filter according to claim 9, wherein the limit table (5) comprises:

The fixing part (5001) is arranged at the opening of the outer valve core (2), and its diameter is the same as the opening at both ends of the outer valve core (2);

The connecting portion (5002) is arranged on the fixed portion (5001) and protrudes toward the inner valve core (3) inside the outer valve core (2);

A limiting portion (5003), the diameter of the limiting portion (5003) is larger than the inner diameter of the inner valve core (3);

The through hole (5004) is arranged on the fixing part (5001) and communicates with the inner space of the outer valve core (2) and the opening of the filter body (1).
The filter according to claim 10, wherein when the inner valve core (3) moves into contact with the limit table (5), a nodal circulation is formed on the side close to the limit table (5) Tao.
The filter according to claim 1, wherein the filter component is:

The filter screen (6) is arranged on both sides of the outer valve core (2).
The filter according to claim 12, wherein the middle of the filter body (1) is a first cylindrical portion (101), and two ends are provided with second cylindrical portions (102) as inlets and outlets, and the first The connecting part of the cylindrical portion (101) and the second cylindrical portion (102) is a tapered portion (103), wherein the diameter of the first cylindrical portion (101) is larger than that of the second cylindrical portion ( 102), the filter screen (6) is provided with the tapered portion (103) or the first cylindrical portion (101).
An air conditioner, comprising the filter according to any one of claims 1-13.