Thermostatic expansion valve and air conditioner

Abstract

This application relates to the field of air conditioner technology and discloses a thermostatic expansion valve and an air conditioner. The thermostatic expansion valve provided in this application includes a valve body with a valve cavity inside, a valve plate inside the valve cavity, and a throttling orifice on the valve plate; a valve core disposed within the valve cavity, the valve core including a deformation valve needle and a pressure-receiving component, the pressure-receiving component being connected to one side of the deformation valve needle, the deformation valve needle having a throttling channel formed thereon, and the other end of the deformation valve needle being inserted into the throttling orifice; and a temperature sensing device communicating with the valve cavity to apply pressure to the pressure-receiving component. This thermostatic expansion valve, by incorporating a deformation valve needle, increases the pressure applied to the deformation valve needle by the temperature sensing device when the thermostatic expansion valve becomes blocked, thereby increasing the opening size of the throttling channel. This allows impurities blocked in the valve cavity to pass through the throttling channel and flow to an external device, solving the problem of impurities easily accumulating in the thermostatic expansion valve in the air conditioner piping system.

Description

Technical Field

[0001] This application belongs to the field of air conditioner technology, and particularly relates to thermal expansion valves and air conditioners. Background Technology

[0002] Thermostatic expansion valve is a key automatic regulating and throttling mechanism in refrigeration and air conditioning systems. Its core function is to precisely control the refrigerant flow into the evaporator in order to achieve optimal utilization of the evaporator and prevent liquid slugging in the compressor.

[0003] In related technologies, a thermostatic expansion valve includes a valve needle and a throttling orifice. The opening degree of the thermostatic expansion valve can be controlled by controlling the size of the gap between the valve needle and the throttling orifice. However, the size of the throttling orifice is usually small, which makes it easy for impurities in the air conditioner piping system to accumulate inside the thermostatic expansion valve, affecting the normal operation of the air conditioner.

[0004] Therefore, improvements to existing technologies are necessary.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This application provides a thermal expansion valve and an air conditioner to solve the problem that impurities in the air conditioner piping system easily accumulate in the thermal expansion valve.

[0007] In a first aspect, embodiments of this application provide a thermal expansion valve, comprising: The valve body has a valve cavity, a valve plate is provided in the valve cavity, and a throttling orifice is provided on the valve plate; A valve core is disposed in the valve cavity. The valve core includes a deformable valve needle and a pressure receiving member. The pressure receiving member is connected to one side of the deformable valve needle. A throttling channel is formed on the deformable valve needle, and the other end of the deformable valve needle is inserted into the throttling orifice. A temperature sensing device, which is connected to the valve chamber, is used to apply pressure to the pressure-receiving component; When the pressure on the deformation valve needle increases, the deformation valve needle deforms, thereby increasing the opening size of the throttling channel.

[0008] In one possible implementation, the deformation valve needle includes a plurality of elastic plates, the two ends of which are fixedly connected, and the plurality of elastic plates are arranged in a circular array to enclose and form the throttling channel, with an opening in the throttling channel formed between adjacent elastic plates.

[0009] In one possible implementation, the valve plate includes a fixed seat and a sliding seat. The fixed seat is fixedly connected to the cavity wall of the valve chamber. The fixed seat has a sliding hole, and the sliding seat slides in conjunction with the sliding hole. The throttling orifice is formed on the sliding seat.

[0010] In one possible implementation, the sliding seat includes a sliding ring, a sliding plate, a connecting rod, and an adjusting bolt. The sliding ring slides in conjunction with the sliding hole. The sliding plate is fixedly connected to the inner ring surface of the sliding ring. The throttling hole is formed on the sliding plate. The adjusting bolt is threadedly connected to the valve body. The connecting rod is fixedly connected to the adjusting bolt and the sliding plate.

[0011] In one possible implementation, the valve body includes a body and an end plate, the end plate being detachably connected to one end of the body, and the adjusting bolt being threadedly connected to the end plate.

[0012] In one possible implementation, the valve plate further includes a sealing ring disposed on the wall of the sliding hole.

[0013] In one possible implementation, the valve body is provided with a first connecting pipe and a second connecting pipe, the fixed seat and the cavity wall of the valve cavity together define a first throttling cavity and a second throttling cavity, the first connecting pipe is connected to the first throttling cavity, and the second connecting pipe is connected to the second throttling cavity.

[0014] In one possible implementation, the pressure-receiving component includes a diaphragm and a valve stem. The diaphragm is fixedly connected to the cavity wall of the valve chamber, and the diaphragm and the cavity wall of the valve chamber define a temperature-sensing cavity. One end of the valve stem is fixedly connected to the diaphragm, and the other end of the valve stem abuts against the deformation valve needle.

[0015] In one possible implementation, the temperature sensing device includes a connecting tube and a temperature sensing bulb, the connecting tube connecting the temperature sensing bulb and the temperature sensing cavity, and a temperature sensing fluid is contained in the temperature sensing bulb, the connecting tube and the temperature sensing cavity.

[0016] Secondly, embodiments of this application also provide an air conditioner, the air conditioner including the thermal expansion valve as described in any of the preceding claims.

[0017] Compared with the prior art, this application has the following beneficial effects: The thermostatic expansion valve provided in this application embodiment, by setting a deformation valve needle and a temperature sensing device, increases the pressure applied by the temperature sensing device to the deformation valve needle when the thermostatic expansion valve is blocked, thereby increasing the opening size of the throttling channel. This allows impurities blocked in the valve cavity to pass through the throttling channel and flow to the external device, reducing the occurrence of impurities blocking the throttling orifice and solving the problem that impurities in the air conditioner piping system are prone to accumulate in the thermostatic expansion valve. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0020] Figure 1 This is a schematic diagram of the structure of the thermostatic expansion valve provided in an embodiment of this application.

[0021] In the diagram: 1. Valve body; 11. Valve plate; 111. Fixed seat; 112. Sliding seat; 1121. Sliding ring; 1122. Sliding plate; 1123. Connecting rod; 1124. Adjusting bolt; 113. Sealing ring; 12. Body; 13. End plate; 14. First connecting pipe; 15. Second connecting pipe; 16. First throttling chamber; 17. Second throttling chamber; 2. Valve core; 21. Deformation valve needle; 211. Elastic sheet; 212. Opening; 22. Valve stem; 23. Diaphragm; 3. Temperature sensing device; 31. Connecting pipe; 32. Temperature sensing bulb. Detailed Implementation

[0022] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0023] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0025] This application provides a thermostatic expansion valve and an air conditioner to solve the problem of impurities easily accumulating in the thermostatic expansion valve in the air conditioner piping system. The following description will be provided in conjunction with the accompanying drawings.

[0026] Please see Figure 1 This application provides a thermostatic expansion valve, including a valve body 1, a valve core 2, and a temperature sensing device 3. The valve body 1 has a valve cavity, and a valve plate 11 is disposed within the valve cavity. A throttling orifice is formed on the valve plate 11. The valve core 2 is disposed within the valve cavity and includes a deformation valve needle 21 and a pressure-receiving component. The pressure-receiving component is connected to one side of the deformation valve needle 21, and a throttling channel is formed on the deformation valve needle 21. The other end of the deformation valve needle 21 is inserted into the throttling orifice. The temperature sensing device 3 communicates with the valve cavity to apply pressure to the pressure-receiving component. When the pressure on the deformation valve needle 21 increases, the deformation valve needle 21 deforms, thereby increasing the size of the opening 212 of the throttling channel.

[0027] By setting up a deformation valve needle 21 and a temperature sensing device 3, when the thermostatic expansion valve becomes blocked, the temperature sensing device 3 applies increased pressure to the deformation valve needle 21, which increases the size of the opening 212 of the throttling channel. This allows impurities blocked in the valve cavity to pass through the throttling channel and flow to the external device, reducing the occurrence of impurities blocking the throttling orifice and solving the problem that impurities in the air conditioner piping system easily accumulate in the thermostatic expansion valve.

[0028] Please see Figure 1 In this embodiment, the valve body 1 includes a body 12 and an end plate 13. A valve cavity is formed in the body 12, and an inspection port is provided on one side of the body 12, communicating with the valve cavity. The end plate 13 covers the inspection port to reduce refrigerant leakage. The end plate 13 is detachably connected to the body 12. Furthermore, a first connecting pipe 14 and a second connecting pipe 15 are fixedly connected to the body 12. The valve plate 11 and the cavity wall of the valve cavity together define a first throttling cavity 16 and a second throttling cavity 17. The first connecting pipe 14 communicates with the first throttling cavity 16, and the second connecting pipe 15 communicates with the second throttling cavity 17. When the thermostatic expansion valve is installed on an air conditioner, the first connecting pipe 14 communicates with the condenser, and the second connecting pipe 15 communicates with the evaporator.

[0029] Please see Figure 1The valve plate 11 includes a fixed seat 111, a sliding seat 112, and a sealing ring 113. The fixed seat 111 is fixedly connected to the cavity wall of the valve chamber. A sliding hole is provided on the fixed seat 111, and the sliding seat 112 slides and engages with the sliding hole. A throttling orifice is provided on the sliding seat 112, and the first throttling cavity 16 and the second throttling cavity 17 are connected through the throttling orifice. The sealing ring 113 is fixedly connected to the wall of the sliding hole. By providing the sealing ring 113, refrigerant leakage can be reduced when the sliding seat 112 slides relative to the fixed seat 111.

[0030] Please see Figure 1 The sliding seat 112 includes a sliding ring 1121, a sliding plate 1122, a connecting rod 1123, and an adjusting bolt 1124. The sliding ring 1121 slides in conjunction with a sliding hole. In this embodiment, the sliding hole is a circular hole, and the sliding ring 1121 is arranged in a circular shape. The sliding plate 1122 is fixedly connected to the inner ring surface of the sliding ring 1121. A throttling hole is opened on the sliding plate 1122. The adjusting bolt 1124 is threadedly connected to the valve body 1. The connecting rod 1123 is fixedly connected to the adjusting bolt 1124 and the sliding plate 1122. By rotating the adjusting bolt 1124, the position of the sliding seat 112 can be adjusted, thereby adjusting the pressure applied by the sliding seat 112 to the deformation valve needle 21, and thus adjusting the preset size of the throttling channel opening 212.

[0031] Please see Figure 1 The deformation valve needle 21 is ellipsoidally shaped and includes multiple elastic plates 211. Each elastic plate 211 can elastically deform under pressure. One end of each elastic plate 211 is fixedly connected along its length, and the other end is also fixedly connected. The multiple elastic plates 211 are arranged in a circular array, forming a throttling channel. An opening 212 of the throttling channel is formed between adjacent elastic plates 211. One end of the deformation valve needle 21 is inserted into a throttling orifice, allowing refrigerant to enter the throttling channel from the opening 212 at the end of the deformation valve needle 21 where the orifice is inserted, and to exit the throttling channel from the opening 212 at the end of the deformation valve needle 21 away from the orifice.

[0032] When the elastic plate 211 deforms under increased pressure, the opening 212 of the throttling channel widens, increasing the refrigerant flow rate and allowing impurities in the air conditioning system to pass through the opening 212, reducing the occurrence of impurities clogging the throttling orifice. Multiple elastic plates 211 form multiple openings 212 of the throttling channel, ensuring that the refrigerant flows out of the throttling channel through multiple openings 212 when passing through the deformed valve needle 21. This helps reduce the impact of the refrigerant on the valve core 2, thereby reducing noise caused by the refrigerant impacting the valve core 2.

[0033] Please see Figure 1The pressure-bearing component includes a diaphragm 23 and a valve stem 22. The diaphragm 23 is fixedly connected to the cavity wall of the valve chamber. The diaphragm 23 is made of an elastic material so that it can undergo elastic deformation after being subjected to pressure. The diaphragm 23 and the cavity wall of the valve chamber define a temperature sensing cavity. One end of the valve stem 22 is fixedly connected to the diaphragm 23, and the other end of the valve stem 22 abuts against the deformation valve needle 21 so that the deformed diaphragm 23 can apply pressure to the deformation valve needle 21 through the valve stem 22.

[0034] Please see Figure 1 The temperature sensing device 3 includes a temperature sensing bulb 32 and a connecting pipe 31. The temperature sensing bulb 32 is made of a thermally conductive material, and the connecting pipe 31 connects the temperature sensing bulb 32 and the temperature sensing cavity. Temperature-sensing fluid is contained within the temperature sensing bulb 32, the connecting pipe 31, and the temperature sensing cavity. The volume of the temperature-sensing fluid is positively correlated with the temperature, so that the pressure inside the temperature sensing cavity increases when the temperature of the temperature-sensing fluid rises. When the thermal expansion valve is installed on the air conditioner, the temperature-sensing fluid is the refrigerant used by the air conditioner. The temperature sensing bulb 32 is located on the outlet pipe of the air conditioner evaporator. When the outlet temperature of the air conditioner evaporator rises, the temperature-sensing fluid expands, causing the diaphragm 23 to expand and bend towards the first throttling cavity 16, thereby widening the opening 212 of the throttling channel and increasing the opening degree of the thermal expansion valve to reduce the outlet temperature of the evaporator.

[0035] This application also provides an air conditioner that includes the thermal expansion valve as described above. Since the air conditioner has the aforementioned thermal expansion valve, it possesses at least some or all of the beneficial effects of the aforementioned thermal expansion valve, which will not be elaborated upon here.

[0036] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0037] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A thermostatic expansion valve, characterized by, include: A valve body (1) is provided inside the valve body (1), and a valve plate (11) is provided inside the valve cavity. A throttling hole is provided on the valve plate (11). Valve core (2), the valve core (2) is disposed in the valve cavity, the valve core (2) includes a deformable valve needle (21) and a pressure receiving member, the pressure receiving member is connected to one side of the deformable valve needle (21), a throttling channel is formed on the deformable valve needle (21), and the other end of the deformable valve needle (21) is inserted into the throttling orifice; Temperature sensing device (3), which is connected to the valve chamber to apply pressure to the pressure-receiving component; When the deformation valve needle (21) is subjected to increased pressure, the deformation valve needle (21) deforms to increase the size of the opening (212) of the throttling channel.

2. The thermostatic expansion valve according to claim 1, characterized in that, The deformable valve needle (21) includes a plurality of elastic plates (211), the two ends of the plurality of elastic plates (211) are fixedly connected respectively, the plurality of elastic plates (211) are arranged in a ring array to enclose and form the throttling channel, and an opening (212) of the throttling channel is formed between adjacent elastic plates (211).

3. The thermostatic expansion valve according to claim 1, characterized in that, The valve plate (11) includes a fixed seat (111) and a sliding seat (112). The fixed seat (111) is fixedly connected to the cavity wall of the valve cavity. A sliding hole is provided on the fixed seat (111). The sliding seat (112) slides and engages with the sliding hole. The throttling hole is provided on the sliding seat (112).

4. The thermostatic expansion valve according to claim 3, characterized in that, The sliding seat (112) includes a sliding ring (1121), a sliding plate (1122), a connecting rod (1123), and an adjusting bolt (1124). The sliding ring (1121) slides in conjunction with the sliding hole. The sliding plate (1122) is fixedly connected to the inner ring surface of the sliding ring (1121). The throttling hole is opened on the sliding plate (1122). The adjusting bolt (1124) is threadedly connected to the valve body (1). The connecting rod (1123) is fixedly connected to the adjusting bolt (1124) and the sliding plate (1122).

5. The thermostatic expansion valve according to claim 4, characterized in that, The valve body (1) includes a body (12) and an end plate (13). The end plate (13) is detachably connected to one end of the body (12), and the adjusting bolt (1124) is threadedly connected to the end plate (13).

6. The thermostatic expansion valve according to claim 3, characterized in that, The valve plate (11) also includes a sealing ring (113), which is disposed on the wall of the sliding hole.

7. The thermal expansion valve according to claim 3, characterized in that The valve body (1) is provided with a first connecting pipe (14) and a second connecting pipe (15). The fixed seat (111) and the cavity wall of the valve cavity together define a first throttling cavity (16) and a second throttling cavity (17). The first connecting pipe (14) is connected to the first throttling cavity (16), and the second connecting pipe (15) is connected to the second throttling cavity (17).

8. The thermal expansion valve according to claim 1, characterized in that The pressure-bearing component includes a diaphragm (23) and a valve stem (22). The diaphragm (23) is fixedly connected to the cavity wall of the valve chamber. The diaphragm (23) and the cavity wall of the valve chamber define a temperature-sensing cavity. One end of the valve stem (22) is fixedly connected to the diaphragm (23), and the other end of the valve stem (22) abuts against the deformation valve needle (21).

9. The thermal expansion valve according to claim 8, characterized in that The temperature sensing device (3) includes a connecting pipe (31) and a temperature sensing bulb (32). The connecting pipe (31) connects the temperature sensing bulb (32) and the temperature sensing cavity. Temperature sensing fluid is contained in the temperature sensing bulb (32), the connecting pipe (31) and the temperature sensing cavity.

10. An air conditioner, characterized in that, The air conditioner includes a thermal expansion valve as described in any one of claims 1-9.

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