Throttling structure and air conditioning equipment

Abstract

The utility model discloses a throttling structure which is used for air conditioning equipment, the throttling structure comprises a pipeline and a throttling piece, and the pipeline is provided with a circulation channel used for circulation of a refrigerant; the throttling element is detachably connected to the circulation channel, at least part of the throttling element is arranged in the circulation channel, the throttling element is provided with a throttling channel, and the throttling channel communicates with the circulation channel so as to conduct throttling on the refrigerant. The throttling element is detachably connected to the circulation channel and at least partially arranged in the circulation channel, the throttling element does not need to be welded, the reliability is high, and disassembly and repair are convenient. Meanwhile, the throttling element does not need to be connected with other pipeline parts in series, and the space utilization rate is high.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning throttling, and in particular to a throttling structure and air conditioning equipment. Background Art

[0002] The throttling device is one of the four major components of a refrigeration system, and its importance is self-evident. The throttling devices currently used in air conditioners include capillary tubes, electronic expansion valves, throttling short tubes, and thermal expansion valves. However, in existing technologies, the throttling device is a section of the refrigeration loop piping, typically connected to other piping components via welding. This presents reliability issues such as numerous weld points, prone to poor welding, and difficulty in later repair. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a throttling structure, wherein the throttling member of the throttling structure can be detachably connected to the pipeline without welding, and has high reliability and is easy to assemble and disassemble.

[0004] The present application also aims to provide an air-conditioning device having the above-mentioned throttling structure.

[0005] The throttling structure according to the first embodiment of the present application includes:

[0006] a pipeline having a circulation channel for circulating a refrigerant;

[0007] A throttling member is detachably connected to the circulation channel and is at least partially disposed in the circulation channel. The throttling member has a throttling channel, which is communicated with the circulation channel to throttle the refrigerant.

[0008] According to the throttling structure of the embodiment of the present application, the throttling member has a throttling channel that communicates with the circulation channel and has a different cross-sectional area. The sudden change in cross-section during the flow of the refrigerant produces a pressure drop, which can throttle the refrigerant. By detachably connecting the throttling member to the circulation channel and at least partially disposing it within the circulation channel, the throttling member does not require welding, resulting in high reliability and easy disassembly and repair. Furthermore, the throttling member does not need to be connected in series with other piping components, thereby improving space utilization.

[0009] According to some embodiments of the present application, the invention further comprises: a sealing member,

[0010] The sealing member is sleeved on the outer periphery of the throttling member to seal the throttling member and the inner peripheral wall of the flow channel;

[0011] Alternatively, a sealing groove is provided on the outer peripheral wall of the throttling element, and the sealing element is sleeved in the sealing groove to seal the throttling element and the inner peripheral wall of the circulation channel.

[0012] According to some embodiments of the present application, the throttling member has a limiting portion, and the limiting portion abuts against the end of the pipeline where the channel opening is provided.

[0013] According to some embodiments of the present application, along the extension direction of the throttling channel, at least one end of the throttling member is provided with a filter member, and the filter member covers the throttling channel.

[0014] According to some embodiments of the present application, at least one end of the throttling element has an expansion channel, and along a direction perpendicular to the extension direction of the throttling channel, the size of at least part of the expansion channel is larger than the size of the throttling channel, the expansion channel is connected to the throttling channel, and the filter element is arranged on a side of the expansion channel away from the throttling channel and covers the expansion channel.

[0015] According to some embodiments of the present application, the outer peripheral wall of the throttling member is provided with an external thread, the inner peripheral wall of the circulation channel is provided with an internal thread, and the throttling member and the circulation channel are threadedly connected via the external thread and the internal thread.

[0016] According to some embodiments of the present application, it is characterized in that the aperture of the throttling channel is 0.2 mm to 2.5 mm;

[0017] And / or, the length of the throttling channel is 5 mm to 60 mm.

[0018] According to the second embodiment of the present application, the air-conditioning equipment includes an indoor unit, an outdoor unit and the throttling structure in the above embodiment, and the pipeline of the throttling structure is connected between the indoor unit and the outdoor unit.

[0019] According to the air-conditioning equipment of the embodiment of the present application, the indoor unit and the outdoor unit are connected by a pipe with a throttling structure, and no welding is required at the throttling component. It has high reliability, is easy to disassemble and repair, and has high space utilization.

[0020] According to some embodiments of the present application, the pipeline is constructed as a stop valve, which is connected to the outdoor unit and communicates with the indoor unit through a connecting pipe, and the throttling element is provided in the flow channel near the connection port of the stop valve;

[0021] Alternatively, the pipeline is constructed as a connecting pipe, and the connecting pipe connects the indoor unit and the outdoor unit;

[0022] Alternatively, the pipeline is constructed as a pipe joint, which is connected to the indoor unit and communicates with the outdoor unit through a connecting pipe.

[0023] According to some embodiments of the present application, the pipeline structure is a stop valve, which is connected to the outdoor unit and communicates with the indoor unit through a connecting pipe, and the throttling device is arranged in the circulation channel near the connecting pipe port of the stop valve; the air-conditioning equipment also includes a connecting pipe nut, and the connecting pipe has a connecting portion, which abuts against the connecting pipe port and is fixedly connected to the connecting pipe port through the connecting pipe nut.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the throttling structure of the embodiment of the present application.

[0027] Figure 2 This is a schematic diagram of the structure of the throttling device in the embodiment of the present application.

[0028] Figure 3 This is a schematic diagram of the structure of the throttling device in the embodiment of the present application.

[0029] Figure 4 This is a partial structural cross-sectional view of the throttling structure of an embodiment of the present application.

[0030] Reference numerals:

[0031] 100: pipeline; 110: circulation channel;

[0032] 200: throttling element; 210: throttling channel; 220: limiting portion; 230: expansion channel;

[0033] 300: seal; 310: sealing groove;

[0034] 400: filter element;

[0035] 500: stop valve; 510: pipe port; 520: connecting pipe; 530: connecting part; 540: pipe nut; 550: limiting protrusion. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. They can refer to mechanical connections or electrical connections. They can refer to direct connections or indirect connections through an intermediary. They can refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] The disclosure herein provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0041] The throttling devices of air-conditioning products currently on the market mainly include: capillary tubes, electronic expansion valves, throttling short tubes, thermal expansion valves, etc. The throttling principle is to generate a pressure drop by changing the cross-sectional area of ​​the refrigeration loop pipeline, while changing the flow rate and flow of the refrigerant in the pipeline. The common characteristics of the throttling devices in the prior art are: they are all one section of the pipeline in the refrigeration loop pipeline, and are generally connected in series with other pipeline parts by welding to form a complete refrigeration loop. If it is removed from the refrigeration loop, the refrigeration loop will be disconnected and cannot be closed. The throttling devices in the prior art require welding, which has high requirements for operators and has reliability problems such as poor capillary consistency, multiple welding points and easy poor welding. If problems such as blockage occur during use, it is difficult to replace the throttling device after sale.

[0042] This application utilizes an innovative structural design to move the throttle element from being connected in series with the refrigeration circuit to being embedded within the refrigeration piping. The presence or absence of this new structure does not disrupt the refrigeration loop, nor does it affect the closed loop. Furthermore, the production method has been changed from welded to a detachable connection assembly, eliminating the need for welding and providing high reliability and ease of repair. Furthermore, the throttle element does not need to be connected in series with other piping components, improving space utilization.

[0043] Please refer to Figures 1 to 4 The throttling structure of the first embodiment of the present application includes a pipeline 100 and a throttling device 200. The pipeline 100 has a circulation channel 110 for circulating refrigerant. The throttling device 200 is detachably connected to the circulation channel 110 and is at least partially arranged in the circulation channel 110. The throttling device 200 has a throttling channel 210, which is connected to the circulation channel 110 to throttle the refrigerant.

[0044] In the aforementioned throttling structure, throttling member 200 includes a throttling passage 210, which communicates with circulation passage 110 and has a different cross-sectional area. This sudden change in cross-sectional area during refrigerant flow produces a pressure drop, thereby throttling the refrigerant. By detachably connecting throttling member 200 to circulation passage 110 and disposing at least partially within circulation passage 110, throttling member 200 eliminates the need for welding, resulting in high reliability and easy disassembly and repair. Furthermore, throttling member 200 does not need to be connected in series with other piping components, thus improving space utilization.

[0045] Specifically, please refer to Figures 1 to 4In some embodiments, the throttle member 200 may be roughly cylindrical, and the cylindrical shape facilitates the throttle member 200 to be arranged in the circulation channel 110 of the pipeline 100. Optionally, the pipeline 100 and the circulation channel 110 may also be roughly cylindrical, which is convenient for installation and manufacturing. Of course, the throttle member 200 and the pipeline 100 may be arranged in other shapes, such as oval, square, etc., as long as they can be matched. The following description will take the cylindrical shape as an example. In some embodiments, the throttle member 200 may be arranged as a whole in the circulation channel 110, that is, the throttle member 200 is completely embedded in the circulation channel 110. At this time, the throttle member 200 can be detachably connected to the circulation channel 110 by means of threaded connection, snap connection, etc., which is convenient for disassembly and assembly, and has low assembly cost. In other embodiments, the throttling member 200 can be partially disposed in the circulation channel 110. For example, the throttling member 200 can be provided with a shoulder. The main part of the throttling member 200 is installed in the circulation channel 110 by threaded connection, clamping, etc. The shoulder abuts against the end of the pipeline 100 where the channel inlet or channel outlet is provided to limit the axial movement of the throttling member 200, and the assembly stability is relatively high.

[0046] A throttling channel 210 is provided inside the throttling member 200. The throttling member 200 is at least partially provided in the circulation channel 110. The cross-sectional area of ​​the throttling channel 210 is smaller than that of the circulation channel 110. When the refrigerant flows through the circulation channel 110 and the throttling channel 210, there is a sudden change in cross-section, which produces a pressure drop. The refrigerant can be throttled. According to actual needs, throttling channels 210 with different cross-sectional areas can be designed, which can be applied to different refrigeration scenarios and has high practicality. The throttling member 200 can be made of copper, stainless steel or polymer plastic material, which is low in cost and easy to manufacture. In some embodiments, the throttling member 200 can be made of brass C3604 or brass C3771, which has a simple structure, is easy to manufacture and is inexpensive.

[0047] In some embodiments, the throttling structure further includes a sealing member 300, which is sleeved on the outer periphery of the throttling member 200 to seal the sealing member 300 and the inner peripheral wall of the circulation channel 110. Specifically, the sealing member 300 can be configured as a sealing ring, which surrounds the outer periphery of the throttling member 200 and abuts between the outer peripheral wall of the throttling member 200 and the inner peripheral wall of the circulation channel 110. That is, the throttling member 200 and the circulation channel 110 are interference-fitted through the sealing member 300. In this way, the gap between the throttling member 200 and the inner peripheral wall of the circulation channel 110 can be sealed, so that when the refrigerant flows through the throttling member 200, it can only flow through the throttling channel 210, thereby ensuring the throttling effect of the throttling member 200 and improving the stability and consistency of the throttling of the throttling member 200.

[0048] In other embodiments, the outer peripheral wall of the throttling member 200 is provided with a sealing groove 310, and the sealing member 300 is sleeved in the sealing groove 310 to seal the sealing member 300 and the inner peripheral wall of the flow channel 110. For details, please refer to Figures 1 to 4 The outer wall of the throttling element 200 is provided with a sealing groove 310 that surrounds the throttling element 200. The sealing element 300 can be constructed as a sealing ring, which is embedded in the sealing groove 310 and abuts against the bottom wall of the sealing groove 310 and the inner wall of the circulation channel 110. That is, the throttling element 200 and the circulation channel 110 are interference-fitted by the sealing element 300. In this way, the gap between the throttling element 200 and the inner wall of the circulation channel 110 can be sealed, so that when the refrigerant flows through the throttling element 200, it can only flow through the throttling channel 210, ensuring the throttling effect of the throttling element 200 and improving the stability and consistency of the throttling of the throttling element 200. The provision of the sealing groove 310 facilitates the installation and positioning of the sealing element 300 and improves the consistency and stability of the installation of the throttling element 200 and the pipeline 100. It can be understood that the outer diameter of the portion of the throttling element 200 located in the circulation channel 110 is smaller than the inner diameter of the circulation channel 110, which is convenient for installation in some embodiments. In some embodiments, the outer diameter of the sealing ring is larger than the inner diameter of the flow channel 110, which is convenient for installation and ensures the sealing effect. In some embodiments, multiple sealing grooves 310 can be provided, such as Figures 1 to 4 As shown, along the axial direction of the throttling member 200, the sealing grooves 310 can be set into two and spaced apart, and the sealing members 300 are also set into two or more corresponding ones. The sealing members 300 are respectively set in the sealing grooves 310. In this way, the sealing between the throttling member 200 and the circulation channel 110 is improved, and the overall throttling performance is improved.

[0049] It is understood that the outer diameter D1 of the portion of the throttling member 200 located within the circulation channel 110 is smaller than the inner diameter D2 of the circulation channel 110. In some embodiments, the difference between D2 and D1 is 0.4 mm to 2 mm, for example, the difference between D2 and D1 is 0.4 mm, 0.7 mm, 1.5 mm, 2 mm, etc., for ease of installation. In some embodiments, the outer diameter D3 of the sealing ring is larger than the inner diameter D2 of the circulation channel 110. In some embodiments, the difference between D3 and D2 is 0.5 mm to 2.6 mm, for example, the difference between D3 and D2 is 0.5 mm, 1 mm, 1.8 mm, 2.6 mm, etc., for ease of installation and ensuring a sealing effect. The sealing member 300 can be made of a highly elastic polymer material such as natural rubber or silicone rubber. In some embodiments, the sealing member 300 is made of HNBR (hydrogenated nitrile butadiene rubber) and has good sealing performance.

[0050] According to some embodiments of the present application, the throttling member 200 has a limiting portion 220, which abuts against the end of the pipeline 100 where the channel opening is provided. Figures 1 to 4The throttling member 200 may include a main body portion located inside the circulation channel 110 and a limiting portion 220 protruding from the outer peripheral wall of the main body portion. It is understood that the outer diameter of the limiting portion 220 is larger than the outer diameter of the main body portion. The pipeline 100 has an end portion provided with a channel opening, and the channel opening can be the liquid inlet of the circulation channel 110. Then the limiting portion 220 is close to the side of the main body portion and abuts against the end surface of the end portion of the pipeline 100 provided with the channel opening. In this way, the axial movement of the throttling member 200 can be limited, which facilitates the positioning and installation of the throttling member 200 and simplifies the process flow. In some embodiments, the limiting portion 220 can be constructed as a shoulder surrounding the main body portion. In this way, the throttling member 200 is easy to machine and speeds up the production cycle. It is understood that the outer diameter D4 of the shoulder is larger than the inner diameter D2 of the circulation channel 110 to limit the throttling member 200.

[0051] According to some embodiments of the present application, along the extension direction of the throttling channel 210, at least one end of the throttling member 200 is provided with a filter 400, and the filter 400 covers the throttling channel 210. For details, please refer to Figures 1 to 4 The throttling channel 210 can be constructed as an elongated hole, and the extension direction of the throttling channel 210 is the axial direction of the throttling channel 210. A filter 400 is provided at one end of the throttling member 200 along the axial direction. The filter 400 covers the throttling channel 210, that is, the radial dimension of the filter 400 is larger than the radial dimension of the throttling channel 210. The refrigerant first flows through the filter 400 and then enters the throttling channel 210. In this way, the refrigerant can be filtered before flowing through the throttling channel 210 to prevent impurities in the refrigerant from clogging the throttling channel 210, causing the refrigeration circuit to be blocked and thus causing the air-conditioning equipment to fail to work. In some embodiments, the filter 400 is provided at both ends of the throttling member 200 along the axial direction. In this way, the refrigerant can pass through two layers of filtration to prevent impurities in the refrigerant from clogging the throttling channel 210 when the refrigerant flows in the reverse direction, thereby ensuring the normal operation of the refrigeration circuit and improving the refrigeration reliability. In some embodiments, the filter element 400 can be configured as a filter mesh, that is, the filter element 400 can be configured as a mesh structure with fine pores. The filter mesh manufacturing process is mature and low-cost. It should be noted that the filter element 400 can also be configured as other filtering structures, such as graphite carbon or other adsorption structures, as long as the filtering function can be achieved. In some embodiments, the filter element 400 can be fixedly connected to the throttling element 200 by bonding, welding, etc., which simplifies the process and facilitates manufacturing.

[0052] According to some embodiments of the present application, at least one end of the throttling member 200 has an expansion channel 230. In a direction perpendicular to the extension direction of the throttling channel 210, at least a portion of the expansion channel 230 is larger than the throttling channel 210. The expansion channel 230 is connected to the throttling channel 210. The filter 400 is disposed on a side of the expansion channel 230 away from the throttling channel 210 and covers the expansion channel 230. For details, please refer to Figures 1 to 4 The throttling element 200 has an expansion channel 230 at one end close to the filter element 400, and the expansion channel 230 is connected to the throttling channel 210, that is, the interior of the throttling element 200 can be divided into a connected throttling channel section and an expansion channel section. The direction perpendicular to the extension direction of the throttling channel 210 can be the radial direction of the throttling channel 210, and the radial dimension of at least part of the expansion channel section is larger than the radial dimension of the throttling channel section, that is, the flow area of ​​the expansion channel 230 is larger than the flow area of ​​the throttling channel 210, and the filter element 400 is arranged on the side of the expansion channel 230 away from the throttling channel 210, so that the filtering area can be expanded to prevent impurities in the refrigerant from blocking the opening of the throttling channel 210. When part of the filter element 400 is blocked, the refrigerant can enter the expansion channel 230 from other parts of the filter element 400 and then enter the throttling channel 210, thereby ensuring the normal operation of the refrigeration circuit. In some embodiments, the throttle channel section is configured as a cylindrical channel section of equal diameter, and the expansion channel section is connected to the throttle channel section at one end, with the radial dimension of the other end gradually increasing to form a funnel shape. In other words, the radial dimension of the expansion channel section at the end where it connects to the throttle channel section is the same as that of the throttle channel section, while the radial dimension of the other end is larger than that of the throttle channel section. In some embodiments, both the throttle channel section and the expansion channel section are configured as cylindrical channel sections of equal diameter, with the radial dimension of the expansion channel section being larger than that of the throttle channel section.

[0053] In some embodiments, expansion channels 230 and filter elements 400 are provided at both ends of the throttling element 200 , and the arrangement is similar to that of arranging the expansion channel 230 and filter element 400 on one side, which will not be repeated here.

[0054] According to some embodiments of the present application, the outer peripheral wall of the throttling member 200 is provided with an external thread, the inner peripheral wall of the circulation channel 110 is provided with an internal thread, and the throttling member 200 and the circulation channel 110 are connected by the external thread and the internal thread. Figures 1-4The end of the throttle member 200 located within the circulation channel 110 is provided with an external thread, while the inner circumferential wall of the circulation channel 110 is provided with an internal thread. During installation, the throttle member 200 can be rotated manually or with a simple tool so that the external thread of the throttle member 200 engages with the internal thread of the circulation channel 110, thereby threading the throttle member 200 and the circulation channel 110 together. This facilitates connection and has a simple structure. It is understood that in this case, the throttle member 200 can be completely located within the circulation channel 110 without a stopper, saving installation space.

[0055] According to some embodiments of the present application, the aperture of the throttling channel 210 is 0.2 mm to 2.5 mm. Figures 1-4 The throttling channel 210 is constructed as an elongated cylindrical through hole. In this case, the aperture of the through hole is 0.2mm to 2.5mm. For example, the aperture of the through hole can be 0.2mm, 1mm, 1.2mm, 1.8mm, 2.5mm, etc. If the aperture of the throttling channel 210 is too small, the risk of the throttling channel 210 being blocked by impurities will increase. If the aperture of the throttling channel 210 is too large, it may cause a poor throttling effect and fail to meet the refrigeration requirements. In some embodiments, the length of the throttling channel 210 is 5mm to 60mm. For details, please refer to Figures 1-4 The throttling channel 210 is constructed as an elongated cylindrical through hole. In this case, the length of the through hole is 5 mm to 60 mm. For example, the length of the through hole can be 5 mm, 10 mm, 20 mm, 35 mm, 60 mm, etc. If the length of the through hole is too short, the throttling effect may be poor and the cooling requirements may not be met. If the length of the through hole is too long, the cost of the throttling member 200 may be unduly increased.

[0056] According to an embodiment of the second aspect of the present application, an air conditioning apparatus includes an indoor unit, an outdoor unit, and the throttling structure of the above embodiment, wherein a pipe 100 of the throttling structure is connected between the indoor unit and the outdoor unit. Specifically, the indoor unit, the outdoor unit, and the pipe 100 of the throttling structure are connected to form a refrigeration circuit, and the refrigerant can be throttled when flowing through the throttling element 200 to achieve cooling.

[0057] According to the air-conditioning equipment of the embodiment of the present application, the indoor unit and the outdoor unit are connected through the pipe 100 of the throttling structure, and no welding is required at the throttling component 200, which has high reliability, is easy to disassemble and repair, and has high space utilization.

[0058] According to some embodiments of the present application, the pipeline 100 is constructed as a stop valve 500, which is connected to the outdoor unit and communicates with the indoor unit through a connecting pipe 520. The throttling member 200 is provided in the flow channel 110 near the connection port 510 of the stop valve 500. For details, please refer to Figures 1 to 4The pipeline 100 is constructed as a stop valve 500, which has a pipe connection 510 connected to a connecting pipe 520. In this case, the throttle member 200 is located in the circulation channel 110 near the pipe connection 510 of the stop valve 500. The refrigerant is transported from the outdoor unit and the internal circulation channel 110 of the stop valve 500 to the throttle member 200 for throttling, and then transported from the connecting pipe 520 to the indoor unit. Alternatively, the refrigerant is transported from the indoor unit and the connecting pipe 520 to the throttle member 200 for throttling, and then transported from the stop valve 500 to the outdoor unit, forming a complete refrigeration circuit. The present application changes the throttle member 200 from being connected in series to the refrigeration circuit to being embedded in the refrigeration pipeline 100. At the same time, the throttle member 200 does not need to be connected in series with other pipeline components, which improves space utilization.

[0059] In some embodiments, the air conditioning device further includes a pipe nut 540, and the connecting pipe 520 has a connecting portion 530, which abuts against the pipe port 510 and is fixedly connected to the pipe port 510 through the pipe nut 540. For details, please refer to Figures 1-4 The connecting portion 530 can be constructed in a bell-mouth shape, that is, a portion of the connecting pipe 520 extends radially outward from the main body of the connecting pipe 520 to form a bell-mouth shape. After the throttle member 200 is installed in the flow channel 110 of the stop valve 500, the throttle member 200 can be provided with a shaft shoulder, which abuts against the pipe port 510 of the throttle valve. Then, the bell-mouth-shaped connecting portion 530 of the connecting pipe 520 is abutted against the pipe port 510 of the throttle valve. It can be understood that the connecting portion 530 is located at the outer periphery of the shaft shoulder of the throttle member 200, and finally the pipe nut 540 is installed. The pipe nut 540 is sleeved on the outer periphery of the pipe port 510 of the throttle valve and abuts against the outer peripheral wall of the connecting portion 530, and is connected to the outer peripheral wall of the stop valve 500 to fix the connecting pipe 520 to the stop valve 500. In this way, the connecting pipe 520 and the stop valve 500 are firmly installed to ensure the realization of the throttling function.

[0060] In some embodiments, a limiting protrusion 550 is provided on the inner wall of the connecting pipe 520. The limiting protrusion 550 is arranged at a position close to the connecting pipe port 510 and can abut against the end of the throttling member 200 axially away from the stop valve 500 to prevent the throttling member 200 from detaching from the circulation channel 110, so that the connection of the throttling member 200 is more stable, and the setting of the limiting protrusion 550 is simple, which is convenient for manufacturing.

[0061] In other embodiments, the pipeline 100 can also be constructed as a connecting pipe 520, which connects the indoor unit and the outdoor unit. Specifically, the throttling device 200 can be detachably connected to the flow channel 110 inside the connecting pipe 520 by means of threaded connection, snap connection, etc. In this way, the throttling device 200 is embedded in the connecting pipe 520 and can be assembled together during after-sales installation, which saves production time and is conducive to improving space utilization.

[0062] In other embodiments, the pipeline 100 is constructed as a pipe joint, which is connected to the indoor unit and communicated with the outdoor unit through a connecting pipe 520. Specifically, the throttling device 200 is detachably connected to the flow channel 110 inside the pipe joint by means of threaded connection, snap connection, etc. In this way, the throttling device 200 is embedded in the pipe joint, which is similar to the implementation method of the stop valve 500, saving production time and helping to improve space utilization.

[0063] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A throttling structure, characterized in that: For air conditioning equipment, the throttling structure includes: a pipeline having a circulation channel for circulating a refrigerant; A throttling member is detachably connected to the circulation channel and is at least partially disposed in the circulation channel. The throttling member has a throttling channel, which is communicated with the circulation channel to throttle the refrigerant.

2. The throttling structure according to claim 1, characterized in that: Also includes: seals, The sealing member is sleeved on the outer periphery of the throttling member to seal the throttling member and the inner peripheral wall of the flow channel; Alternatively, a sealing groove is provided on the outer peripheral wall of the throttling element, and the sealing element is sleeved in the sealing groove to seal the throttling element and the inner peripheral wall of the circulation channel.

3. The throttling structure according to claim 1, characterized in that: The throttling member has a limiting portion, and the limiting portion abuts against the end of the pipeline where the channel opening is provided.

4. The throttling structure according to claim 1, characterized in that: Along the extension direction of the throttling channel, at least one end of the throttling member is provided with a filter member, and the filter member covers the throttling channel.

5. The throttling structure according to claim 4, characterized in that: At least one end of the throttling element has an expansion channel. Along the direction perpendicular to the extension direction of the throttling channel, the size of at least part of the expansion channel is larger than the size of the throttling channel. The expansion channel is connected to the throttling channel, and the filter element is arranged on the side of the expansion channel away from the throttling channel and covers the expansion channel.

6. The throttling structure according to claim 1, characterized in that: The outer peripheral wall of the throttling element is provided with an external thread, the inner peripheral wall of the circulation channel is provided with an internal thread, and the throttling element and the circulation channel are threadedly connected through the external thread and the internal thread.

7. The throttle structure according to any one of claims 1 to 6, characterized in that: The aperture of the throttling channel is 0.2 mm to 2 mm; And / or, the length of the throttling channel is 5 mm to 60 mm.

8. An air conditioning device, characterized in that: The utility model comprises an indoor unit, an outdoor unit and a throttling structure according to any one of claims 1 to 7, wherein a pipeline of the throttling structure is connected between the indoor unit and the outdoor unit.

9. The air conditioning device according to claim 8, characterized in that The pipeline is constructed as a stop valve, which is connected to the outdoor unit and communicates with the indoor unit through a connecting pipe. The throttling element is provided in the flow channel near the connecting pipe port of the stop valve. Alternatively, the pipeline is constructed as a connecting pipe, and the connecting pipe connects the indoor unit and the outdoor unit; Alternatively, the pipeline is constructed as a pipe joint, which is connected to the indoor unit and communicates with the outdoor unit through a connecting pipe.

10. The air conditioning device according to claim 9, characterized in that The pipeline structure is a stop valve, which is connected to the outdoor unit and communicates with the indoor unit through a connecting pipe. The throttling device is arranged in the circulation channel near the connecting pipe port of the stop valve; the air-conditioning equipment also includes a connecting pipe nut, and the connecting pipe has a connecting portion, which abuts against the connecting pipe port and is fixedly connected to the connecting pipe port through the connecting pipe nut.

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