One-way valve, heating and ventilation equipment outdoor unit and heating and ventilation equipment

Abstract

The utility model discloses a one-way valve, a heating and ventilation equipment outdoor unit and heating and ventilation equipment, and relates to the technical field of heating and ventilation equipment. A one-way valve comprises a valve body and a valve element, the valve element is installed in the valve body, the valve body is designed to comprise a second pipe section with the inner diameter larger than that of a first pipe section and that of a third pipe section, a reducing pipe section is arranged between the first pipe section and the second pipe section, and the inner wall of the reducing pipe section is conical to replace an original valve seat. The valve element can be in sealing fit with the inner wall of the variable-diameter pipe section to achieve circulation closing in one direction, and due to the fact that the inner diameter of the second pipe section is larger than that of the third pipe section, the end, facing the third pipe section, of the valve element can be in limiting fit with the third pipe section to replace an original check ring, circulation opening in the other direction is achieved through a flow channel, and the sealing effect is good. While the function of the one-way valve is achieved, an original valve seat and check ring structure is omitted, and the structural complexity and the production cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, ventilation and air conditioning (HVAC) equipment, in particular to a check valve for an outdoor unit of HVAC equipment and HVAC equipment. Background Art

[0002] The information provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] The outdoor unit of HVAC equipment includes a compressor, a heat exchanger, and a four-way valve connecting the compressor and the heat exchanger. A check valve needs to be configured at the inlet where the four-way valve is connected to the compressor to achieve one-way flow between the two.

[0004] The existing check valve needs to configure a valve seat and a retaining ring in the valve body to cooperate with the valve core to achieve one-way opening and closing of the valve body. The structure is relatively complex and the production cost is high. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the problems of the complex structure and high production cost of the existing check valve. This purpose is achieved through the following technical solutions:

[0006] In a first aspect, the utility model provides a check valve, which includes a valve body and a valve core. The valve body includes a first pipe section, a reduced-diameter pipe section, a second pipe section, and a third pipe section that are sequentially connected and communicated along its axial direction. Along the direction from the first pipe section to the second pipe section, the inner diameter of the reduced-diameter pipe section gradually increases. The inner diameter of the second pipe section is larger than that of the first pipe section, and the inner diameter of the second pipe section is larger than that of the third pipe section. The valve core is arranged in the valve body and is adapted to reciprocate between the first pipe section and the third pipe section along the axial direction of the valve body. Wherein, the valve core is provided with a flow channel. When the valve core moves to abut against the inner wall surface of the reduced-diameter pipe section, it is hermetically matched with the reduced-diameter pipe section to cut off the communication between the first pipe section and the second pipe section. When the end of the valve core facing the third pipe section moves to be in limit cooperation with the third pipe section, the first pipe section is communicated with the second pipe section, and the flow channel communicates the second pipe section and the third pipe section.

[0007] According to the check valve provided by the present utility model, the valve body is designed to include a second pipe section with an inner diameter larger than that of the first pipe section and the third pipe section, and a reduced-diameter pipe section is arranged between the first pipe section and the second pipe section. The reduced-diameter pipe section forms an inner wall in a conical shape to replace the original valve seat. The valve core can be in sealed cooperation with the inner wall of the reduced-diameter pipe section to achieve the closing of the flow in one direction. And because the inner diameter of the second pipe section is larger than that of the third pipe section, one end of the valve core facing the third pipe section can be in limit cooperation with the third pipe section to replace the original retaining ring, and the flow in the other direction is opened through the flow channel. While realizing the function of the check valve, the original valve seat and retaining ring structures are cancelled, reducing the complexity of the structure and the production cost.

[0008] In addition, the check valve provided by the present utility model may further have the following additional technical features:

[0009] In some embodiments of the present utility model, the valve core includes a body portion and an annular sealing portion. The annular sealing portion is connected to one end of the body portion facing the first pipe section. The body portion is provided with the flow channel, and the annular sealing portion is used for sealing connection with the inner wall surface of the reduced-diameter pipe section.

[0010] In some embodiments of the present utility model, the annular sealing portion includes an annular rib protruding from the end face of the body portion facing the first pipe section, and the annular rib is used for line sealing with the inner wall surface of the reduced-diameter pipe section.

[0011] In some embodiments of the present utility model, along the direction from the first pipe section to the second pipe section, the radial dimension of the outer wall surface of the annular sealing portion gradually decreases, and the annular rib is arranged at one end of the annular sealing portion facing the first pipe section.

[0012] In some embodiments of the present utility model, the valve core further includes a reduced-diameter portion, and the reduced-diameter portion is concentrically connected to one end of the annular sealing portion facing the first pipe section. Along the direction close to the first pipe section, the radial dimension of the reduced-diameter portion gradually decreases.

[0013] In some embodiments of the present utility model, the body portion is provided with a first cavity, the annular sealing portion is provided with a second cavity, and the reduced-diameter portion is provided with a third cavity. The first cavity, the second cavity and the third cavity are communicated in sequence.

[0014] In some embodiments of the present utility model, at least two limiting members are arranged at intervals on the outer wall surface of the body portion. An adjacent two of the limiting members and the outer wall surface of the body portion enclose a flow channel, and the limiting members are used for limit cooperation with the third pipe section.

[0015] In some embodiments of the present utility model, a first limiting portion is provided at one end of the limiting member facing away from the first pipe section. The first limiting portion extends out of the end of the body portion facing away from the first pipe section and is used for limiting cooperation with the third pipe section.

[0016] In some embodiments of the present utility model, one end of the third pipe section is inserted into the second pipe section and is connected to the second pipe section. One end of the valve core facing the third pipe section is used for limiting cooperation with the end of the third pipe section inserted into the second pipe section.

[0017] In some embodiments of the present utility model, a second limiting portion is provided on the outer wall surface of the third pipe section. The second limiting portion is used for limiting cooperation with the end of the second pipe section facing away from the reduced-diameter pipe section.

[0018] In some embodiments of the present utility model, the first pipe section, the reduced-diameter pipe section, the second pipe section, and the third pipe section are of an integrally formed structure.

[0019] In a second aspect, the present utility model provides an outdoor unit of a heating, ventilation, and air conditioning (HVAC) device, including a housing, a heat exchanger, a compressor, a four-way valve, and a check valve as described in any one of the above technical solutions. The compressor, the heat exchanger, the four-way valve, and the check valve are located inside the housing. The four-way valve has a first communication port and a second communication port. The first communication port, the check valve, and the compressor are connected in sequence, and the second communication port is connected to the heat exchanger.

[0020] In a third aspect, the present utility model provides an HVAC device, including an indoor unit of an HVAC device and an outdoor unit of an HVAC device as described in any one of the above technical solutions. The indoor unit of the HVAC device and the outdoor unit of the HVAC device are connected through pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0022] Figure 1 Schematically shows a structural diagram of a check valve provided according to an embodiment of the present utility model;

[0023] Figure 2 For Figure 1 the A-A cross-sectional view of;

[0024] Figure 3 For Figure 2 the structural diagram of the check valve in the closed state in;

[0025] Figure 4 is Figure 2 a schematic structural view of the one-way valve in the open state in

[0026] Figure 5 schematically shows a schematic structural view of the valve core provided according to an embodiment of the present invention from a first perspective;

[0027] Figure 6 schematically shows a schematic structural view of the valve core provided according to an embodiment of the present invention from a second perspective;

[0028] Figure 7 schematically shows a schematic structural view of the valve core provided according to an embodiment of the present invention from a third perspective;

[0029] Figure 8 is Figure 7 the B - B sectional view of

[0030] The reference numerals are as follows:

[0031] 100, one-way valve;

[0032] 10, valve body; 11, first pipe section; 111, first flared structure; 12, reduced-diameter pipe section; 13, second pipe section; 14, third pipe section; 141, second limiting portion; 142, second flared structure;

[0033] 20, valve core; 21, body portion; 211, flow channel; 212, first cavity; 213, limiting member; 2131, first limiting portion; 22, annular sealing portion; 221, annular edge; 222, second cavity; 23, reduced-diameter portion; 231, third cavity. Detailed Embodiments

[0034] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0035] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless explicitly stated as an order of performance. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be termed a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0037] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an orientation above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0038] Combined with the attached Figures 1-4 As shown, this embodiment provides a one-way valve 100. The one-way valve 100 can be used in the outdoor unit of a heating, ventilation, and air conditioning (HVAC) device. For example, the one-way valve 100 can be installed at at least one inlet of the four-way valve of the outdoor unit of the HVAC device and is used to connect to a compressor.

[0039] The check valve 100 of this embodiment includes a valve body 10 and a valve core 20. The valve body 10 is a tubular structure. The material of the valve body 10 can be metal or plastic with high structural strength. Its cross-sectional shape can be annular or approximately annular. The valve body 10 includes a first pipe section 11, a reduced-diameter pipe section 12, a second pipe section 13, and a third pipe section 14 that are sequentially connected and communicated along its length direction. Among them, the inner diameter of the reduced-diameter pipe section 12 gradually increases in the direction from the first pipe section 11 to the second pipe section 13. The inner diameter of the second pipe section 13 is larger than the inner diameters of the first pipe section 11 and the third pipe section 14. The "inner diameter" refers to the diameter of the inner wall surface of each section or the radial dimension. And, the radial dimension of the outer wall of the second pipe section 13 can be larger than or equal to the inner diameters of the outer walls of the first pipe section 11 and the third pipe section 14.

[0040] The valve core 20 of this embodiment is installed in the second pipe section 13. The radial dimension of the outer wall surface of the valve core 20 is less than or equal to the radial dimension of the inner wall surface of the second pipe section 13. Specifically, the radial dimension of the outer wall surface of the valve core 20 can be slightly less than the radial dimension of the inner wall surface of the second pipe section 13. For example, the difference between the two is within 0.1 mm - 10 mm, so that the valve core 20 can move along the length direction or the axial direction of the second pipe section 13 under the drive of a liquid such as refrigerant. The radial dimension of the outer wall surface of the valve core 20 is slightly larger than the inner diameter dimension of the third pipe section 14, so that the two can abut and be in a limiting fit.

[0041] The valve core 20 of this embodiment is located in the second pipe section 13 and can move between an open position and a closed position. The open position means that the valve core 20 is located at one end of the second pipe section 13 close to the reduced-diameter pipe section 12, and the closed position means that the valve core 20 is located at one end of the second pipe section 13 away from the reduced-diameter pipe section 12. When the valve core 20 of this embodiment is in Figure 3 the closed position as described above, one end of the valve core 20 close to the second pipe section 13 is in sealing fit with the second pipe section 13 to cut off the communication between the first pipe section 11 and the second pipe section 13. When the valve core 20 of this embodiment is in Figure 4 the open position as described above, the first pipe section 11 is communicated with the second pipe section 13, and one end of the valve core 20 facing the third pipe section 14 is in limiting fit with the third pipe section 14. The flow channel 211 communicates the second pipe section 13 and the third pipe section 14.

[0042] Combined with the above structural description, in the present utility model, the valve body 10 is designed to include a second pipe section 13 with an inner diameter larger than that of the first pipe section 11 and the third pipe section 14, and a reduced-diameter pipe section 12 is arranged between the first pipe section 11 and the second pipe section 13. The inner wall of the reduced-diameter pipe section 12 is formed into a conical shape to replace the original valve seat. The annular sealing portion 22 of the valve core 20 can be in sealing cooperation with the inner wall of the reduced-diameter pipe section 12 to achieve the closing of the one-way valve 100 in one direction. And one end of the valve core 20 facing the third pipe section 14 can be in limiting cooperation with the third pipe section 14 to replace the original retaining ring, and the one-way valve 100 is opened in the other direction through the flow channel 211. While realizing the function of the one-way valve 100, the original valve seat and retaining ring structures are cancelled, reducing the structural complexity and production cost.

[0043] Combined with the attached Figures 5-8 As shown, the valve core 20 of this embodiment includes a body portion 21 and an annular sealing portion 22. The annular sealing portion 22 is located at one end of the body portion 21 facing the first pipe section 11. The body portion 21 is provided with a flow channel 211. When the valve core 20 of this embodiment is in Figure 3 the closed position shown in the figure, the annular sealing portion 22 is in sealing cooperation with the conical inner wall surface of the second pipe section 13 to form a seal to close the connection between the first pipe section 11 and the second pipe section 13, thereby realizing the closing of the one-way valve 100 in one direction. When the valve core 20 of this embodiment is in Figure 4 the open position shown in the figure, one end of the body portion 21 facing the third pipe section 14 is in limiting cooperation with the third pipe section 14, and at this time, the second pipe section 13 and the third pipe section 14 are connected through the flow channel 211, thereby realizing the opening of the one-way valve 100 in the other direction.

[0044] The sealing form between the annular sealing portion 22 and the inner wall of the reduced-diameter pipe section 12 can be line sealing or surface sealing. Line sealing means preventing leakage by forming a point or line contact between the annular sealing portion 22 and the reduced-diameter pipe section 12, usually having a smaller sealing surface. For example, the inner wall of the annular sealing portion 22 and the reduced-diameter pipe section 12 are sealed through an annular line or an annular narrow surface. The width of the surface is usually less than 1 mm. Surface sealing is achieved by the two contacting through a larger area. For example, the inner wall of the annular sealing portion 22 and the reduced-diameter pipe section 12 are sealed through an annular surface, and the width of the surface is usually not less than 1 mm.

[0045] In some examples, optionally, the annular sealing portion 22 includes an annular rib 221 having an annular line or an annular surface with a smaller width. The annular rib 221 is in line sealing with the inner wall of the reduced-diameter pipe section 12. Realizing the line sealing with the reduced-diameter pipe section 12 through the annular rib 221 not only has a simple structure and is easy to process, but also facilitates the refrigerant to drive the two to contact and seal.

[0046] The annular edge 221 of this embodiment can be realized by designing the annular sealing part 22 as a frustum shape or approximately a frustum shape. Along the direction away from the first pipe section 11, the radial dimension of the annular sealing part 22 of this embodiment gradually increases, and the outer edge of the end of the annular sealing part 22 facing the first pipe section 11 forms the annular edge 221.

[0047] To prevent the valve core 20 from shifting or toppling along the axial direction of the valve body 10 during movement, a reduced-diameter part 23 is further provided at one end of the valve core 20 facing the first pipe section 11 in this embodiment. The reduced-diameter part 23 can be understood as being concentrically connected to the end face of the annular sealing part 22 facing the first pipe section 11. Along the direction close to the first pipe section 11, the radial dimension of the reduced-diameter part 23 gradually decreases. In some embodiments, the reduced-diameter part 23 can be the conical shape shown in the figure, or in the structure of a frustum or a truncated cone.

[0048] Combined with the attached Figure 8 As shown, in order to facilitate the movement of the valve core 20 driven by the refrigerant, in some examples, optionally, the body part 21, the annular sealing part 22, and the reduced-diameter part 23 of this embodiment are all designed as hollow structures. Specifically, it can be understood that the body part 21 is provided with a first cavity 212, the annular sealing part 22 is provided with a second cavity 222, and the reduced-diameter part 23 is provided with a third cavity 231, and the first cavity 212, the second cavity 222, and the third cavity 231 are communicated in sequence.

[0049] The valve core 20 with the above-mentioned hollow structure can not only reduce the weight of the valve core 20 and facilitate the movement of the valve core 20, but also save the materials required for processing the valve core 20, thereby reducing the production cost.

[0050] In some examples, optionally, one end of the body part 21 facing the third pipe section 14 is provided with an opening, and the opening communicates with the first cavity 212, so that the refrigerant can enter the first cavity 212, the second cavity 222, and the third cavity 231 through the opening, thereby pushing the valve core 20 of this embodiment to move from the open position to the closed position.

[0051] The way of arranging the flow channel 211 and the limiting cooperation with the third pipe section 14 on the body part 21 of this embodiment can be realized by arranging limiting members 213 thereon. A plurality of limiting members 213 are arranged at intervals along the circumferential direction of the body part 21 on the outer wall surface of the body part 21. The limiting members 213 of this embodiment can be plate-shaped members or block-shaped members. A plurality of limiting members 213 are arranged at intervals along the circumferential direction of the body part 21 on the outer wall surface of the body part 21. A flow channel 211 is formed between the adjacent two limiting members 213 and the outer wall surface of the body part 21. Taking the four limiting members 213 Figure 7 as an example, the four limiting members 213 and the body part 21 form four flow channels 211.

[0052] The material of the main body 21 can be metal or plastic. The material of the limiting member 213 of this embodiment can be the same as that of the main body 21, so that the main body 21 and the limiting member 213 can be integrally formed during processing, or integrally connected by welding, hot melting, etc.

[0053] In addition, the number of the limiting member 213 can also be one. When the number of the limiting member 213 is one, the two side surfaces of the limiting member 213 along the circumferential direction and the outer wall surface of the body can form a flow channel 211.

[0054] Of course, the structural form of the valve core 20 of the present embodiment is not limited thereto. For example, the valve core 20 may also be a cylinder having a radial dimension greater than that of the first pipe segment 11 and the third pipe segment 14. A groove is provided on the outer wall of the cylinder and the depth gradually deepens in the direction approaching the third pipe segment 14 to form a flow channel 211 (this embodiment is not shown in the figure). The groove does not extend to the end of the valve core 20 facing the first pipe segment 11, so that the end of the valve core 20 facing the first pipe segment 11 can block the first pipe segment 11. When the end of the valve core 20 facing the third pipe segment 14 is against the third pipe segment 14, the gradually deepening groove has a certain depth to connect the third pipe segment 14 and the second pipe segment 13.

[0055] In some examples, optionally, in this embodiment, a first limiting portion 2131 is provided at the end of the limiting member 213 that is away from the first pipe segment 11. The first limiting portion 2131 extends from the end of the main body 21 that is away from the first pipe segment 11, and is used to cooperate with the third pipe segment 14 to limit the valve core 20, thereby preventing the valve core 20 from continuing to move toward the direction close to the third pipe segment 14 when in the open state.

[0056] This structure allows the first limit portion 2131 to limit against the third pipe segment 14, so that a gap for liquid circulation can be formed between the main body 21 and the third pipe segment 14. The gap connects the third pipe segment 14 and multiple flow channels 211 respectively. Compared with the method of circulating the refrigerant only through the flow channels 211, the flow rate of the refrigerant can be increased when the one-way valve 100 is in the open state.

[0057] In some examples, optionally, the first limiting portion 2131 is connected to the end surface of the main body 21 facing the third pipe segment 14. This structure enables the surface of the first limiting portion 2131 facing the third pipe segment 14 to have a larger radial dimension, thereby making it easier for the first limiting portion 2131 to be limited and matched with the third pipe segment 14.

[0058] In order to facilitate processing and facilitate the limiting cooperation between the first limiting portion 2131 and the third pipe segment 14, the third pipe segment 14 with a smaller radial dimension can be directly inserted into the second pipe segment 13 to achieve the plug-in connection between the third pipe segment 14 and the second pipe segment 13. The plug-in connection method is easy to operate, which can improve production efficiency and reduce production costs.

[0059] Of course, after the third pipe section 14 is inserted into the second pipe section 13, the connection between the two can also be strengthened by welding or by means of a connecting piece (not shown in the figure), and specific examples are not listed one by one in this embodiment.

[0060] Combined with the attached Figure 4 As shown, when the valve core 20 is in the open position, the end of the valve core 20 facing the third pipe section 14 is in limiting fit with the annular end face of the end of the third pipe section 14 inserted into the first pipe section 11.

[0061] In some examples, optionally, a second limiting portion 141 is provided on the outer wall surface of the third pipe section 14 of this embodiment. The second limiting portion 141 may include a protruding structure, and the protruding form may be an annular or semi-annular flange arranged along the circumferential direction of the outer wall surface of the third pipe section 14. Of course, in some embodiments, the second limiting portion 141 may also be a dot-like protrusion, and the number of dot-like protrusions may be one or more, and multiple dot-like protrusions are arranged at intervals along the circumferential direction of the outer wall surface of the third pipe section 14.

[0062] The second limiting portion 141 is used for limiting fit with the end of the first pipe section 11 facing away from the second pipe section 13, so as to prevent the third pipe section 14 from being inserted too deeply when inserted into the second pipe section 13, and by observing the position of the second limiting portion 141, it can also prevent the third pipe section 14 from being inserted too shallowly when inserted into the second pipe section 13, which may affect the connection stability between the two.

[0063] In addition to inserting the third pipe section 14 into the second pipe section 13, the first pipe section 11, the reduced-diameter pipe section 12, the second pipe section 13, and the third pipe section 14 can also be designed as an integrally formed structure (this implementation method is not shown in the figure), that is, the three are integrally formed by injection molding or hot melting, etc., and then the inner diameters of the first pipe section 11 and the third pipe section 14 are made smaller than the inner diameter of the second pipe section 13 through a spinning process or a hydroforming process, and the inner diameter of the reduced-diameter pipe section 12 gradually decreases from the direction of the first pipe section 11 to the second pipe section 13.

[0064] In order to facilitate the connection of the one-way valve 100 of this embodiment to other pipelines, a first flared structure 111 may also be provided at the end of the first pipe section 11 of this embodiment facing away from the flared section, and the inner diameter of the first flared structure 111 is larger than the inner diameter of the rest of the second pipe section 13.

[0065] There are two implementation manners in which the inner diameter of the first flaring structure 111 is larger than the inner diameter of the remaining part of the first pipe section 11. One is that the inner diameter (radial dimension of the inner wall surface) of the first flaring structure 111 is larger than the inner diameter of the remaining part of the first pipe section 11, and at the same time, the outer diameter of the first flaring structure 111 is also larger than the outer diameter of the remaining part of the first pipe section 11. At this time, the wall thickness of the first pipe section 11 can be equal. The other is that the inner diameter of the first flaring structure 111 is larger than the inner diameter of the remaining part of the first pipe section 11, and at the same time, the outer diameter of the first flaring structure 111 is not larger than the outer diameter of the remaining part of the first pipe section 11. At this time, the wall thickness of the first pipe section 11 becomes thinner at the first flaring structure 111.

[0066] Similarly, a second flaring structure 142 can be provided at one end of the third pipe section 14 away from the first pipe section 11, and the inner diameter of the second flaring structure 142 is larger than the inner diameter of the remaining part of the second pipe section 13. Both the first flaring structure 111 and the second flaring structure 142 can be formed by a spinning process. The design of the first flaring structure 111 and the second flaring structure 142 can enable the one-way valve 100 to be connected to a pipeline with a larger radial dimension, thereby facilitating the one-way valve 100 to dock with structures such as a compressor and a four-way valve.

[0067] Based on the above one-way valve 100, the present utility model provides an outdoor unit of a heating, ventilation and air conditioning (HVAC) device, including a housing, a heat exchanger, a compressor, a four-way valve (not shown in the figure), and the one-way valve 100 according to any one of the above technical solutions; two compressors, two heat exchangers, the four-way valve, and the one-way valve 100 are located inside the housing. The four-way valve has two first communication ports and two second communication ports. One first communication port, one one-way valve 100, and one of the compressors are connected in sequence, and the other first communication port, the other one-way valve 100, and the other compressor are connected in sequence. One second communication port is connected to one of the heat exchangers, and the other second communication port is connected to the other heat exchanger. Since the housing, heat exchanger, compressor, and four-way valve of the outdoor unit of the HVAC device can refer to the related art, no drawing description is given for this embodiment.

[0068] Based on the above outdoor unit of the HVAC device, this embodiment further provides an HVAC device, including the outdoor unit of the HVAC device shown in the above technical solution. In some embodiments, the HVAC device further includes an indoor unit of the HVAC device (not shown in the figure). For the structure of the indoor unit of the HVAC device and other parts of the HVAC device except for the indoor unit and the outdoor unit, please refer to the related art, and details are not described herein again.

[0069] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A one-way valve, characterized in that: include: The valve body comprises a first pipe segment, a reducing pipe segment, a second pipe segment and a third pipe segment which are sequentially connected and communicated along the axial direction thereof, wherein the inner diameter of the reducing pipe segment gradually increases along the direction from the first pipe segment to the second pipe segment, the inner diameter of the second pipe segment is larger than the inner diameter of the first pipe segment, and the inner diameter of the second pipe segment is larger than the inner diameter of the third pipe segment; A valve core is disposed in the valve body and is adapted to reciprocate between the first pipe section and the third pipe section along the axial direction of the valve body; In which, the valve core is provided with a flow channel, and the valve core is suitable for sealing and cooperating with the reducing pipe section when it moves to abut against the inner wall surface of the reducing pipe section to cut off the connection between the first pipe section and the second pipe section, and the valve core is suitable for connecting the first pipe section with the second pipe section when it moves to the end facing the third pipe section and cooperates with the third pipe section in a limiting manner, and the flow channel connects the second pipe section and the third pipe section.

2. The one-way valve according to claim 1, characterized in that: The valve core includes a main body and an annular sealing portion, wherein the annular sealing portion is connected to one end of the main body facing the first pipe section, the main body is provided with the flow channel, and the annular sealing portion is used for sealingly connecting with the inner wall surface of the reducing pipe section.

3. The one-way valve according to claim 2, characterized in that: The annular sealing portion comprises an annular ridge protruding from the end surface of the main body portion facing the first pipe section, and the annular ridge is used for line sealing with the inner wall surface of the reducing pipe section.

4. The one-way valve according to claim 3, characterized in that: Along the direction from the first pipe section to the second pipe section, the radial dimension of the outer wall surface of the annular sealing portion gradually decreases, and the annular edge is provided at one end of the annular sealing portion facing the first pipe section.

5. The one-way valve according to claim 4, characterized in that: The valve core further comprises a diameter reducing portion, which is coaxially connected to one end of the annular sealing portion facing the first pipe section, and the radial dimension of the diameter reducing portion gradually decreases in a direction approaching the first pipe section.

6. The one-way valve according to claim 5, characterized in that: The main body is provided with a first cavity, the annular sealing portion is provided with a second cavity, the diameter-changing portion is provided with a third cavity, and the first cavity, the second cavity and the third cavity are connected in sequence.

7. The one-way valve according to any one of claims 2 to 6, characterized in that: At least two limiting members are arranged at intervals on the outer wall surface of the main body, and a flow channel is enclosed between two adjacent limiting members and the outer wall surface of the main body, and the limiting members are used to cooperate with the third pipe section in limiting position.

8. The one-way valve according to claim 7, characterized in that: The end of the limiting member away from the first pipe section is provided with a first limiting portion, the first limiting portion extends from the end of the main body away from the first pipe section, and is used for limiting cooperation with the third pipe section.

9. The one-way valve according to any one of claims 1 to 6, characterized in that: One end of the third pipe segment is inserted into the second pipe segment and connected to the second pipe segment, and the end of the valve core facing the third pipe segment is used for limiting cooperation with one end of the third pipe segment inserted into the second pipe segment.

10. The one-way valve according to claim 9, characterized in that: A second limiting portion is disposed on the outer wall surface of the third pipe segment, and the second limiting portion is used for limiting cooperation with an end of the second pipe segment away from the reducing pipe segment.

11. The one-way valve according to any one of claims 1 to 6, characterized in that: The first pipe section, the diameter-reducing pipe section, the second pipe section and the third pipe section are an integrally formed structure.

12. An outdoor unit of a heating and ventilation equipment, characterized in that: It comprises a shell, a heat exchanger, a compressor, a four-way valve and a one-way valve as claimed in any one of claims 1 to 11; The compressor, the heat exchanger, the four-way valve and the one-way valve are located in the shell. The four-way valve has a first connecting port and a second connecting port. The first connecting port, the one-way valve and the compressor are connected in sequence. The second connecting port is connected to the heat exchanger.

13. A HVAC equipment, characterized in that: It comprises a HVAC equipment indoor unit and a HVAC equipment outdoor unit as claimed in claim 12, wherein the HVAC equipment indoor unit and the HVAC equipment outdoor unit are connected by pipelines.

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