Air pipe structure, variable shunting heat exchanger and air conditioner

Abstract

The utility model relates to the technical field of household appliances, and discloses a gas pipe structure which comprises a gas collecting pipe, a gas inlet pipe, a gas pipe conduction component and a first gas pipe branch pipe. The air inlet pipe is communicated with the air collecting pipe, the air pipe communicating component is arranged on the air collecting pipe and comprises a first communicating inflow end and a first communicating outflow end, one side of the first communicating outflow end of the air collecting pipe is communicated with the air inlet pipe, and the first air pipe branch pipe is communicated with one side of the first communicating outflow end of the air collecting pipe; the first air pipe branch pipe is provided with a resistance pipe section used for increasing the flowing resistance of a refrigerant. Therefore, the integral shunting uniformity of the variable shunting heat exchanger is improved. The utility model further provides the variable flow dividing heat exchanger and the air conditioner.

Description

Technical Field

[0001] The present application relates to the field of household appliance technology, for example, to an air pipe structure, a variable split heat exchanger and an air conditioner. Background Art

[0002] The heat exchanger is an important structural component of the air conditioner to achieve cooling and heating operations.

[0003] The existing variable split heat exchanger is a type of heat exchanger that can be used as an outdoor heat exchanger. In order to enable the heat exchanger to perform at its best when operating in both cooling mode and heating mode, the variable split heat exchanger uses valve components such as a one-way valve and a liquid separation valve, so that the heat exchange flow path of the outdoor heat exchanger can change according to the operating mode of the air conditioner. When the air conditioner operates in cooling mode, the multiple heat exchange flow paths of the variable split heat exchanger are connected in series, and when the air conditioner operates in heating mode, the multiple heat exchange flow paths of the variable split heat exchanger are connected in parallel. In this way, the outdoor heat exchanger has the best refrigerant flow path in different operating modes.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The air pipe structure of the heat exchanger causes a large difference in refrigerant flow between different heat exchange flow paths of the heat exchanger, thereby reducing the heat exchange efficiency of the heat exchanger.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiments provide an air pipe structure, a variable split heat exchanger and an air conditioner to solve the problem that when the air conditioner is operating in a heating mode, the refrigerant flow rate between different heat exchange paths of the heat exchanger is greatly different, thereby reducing the heat exchange efficiency of the variable split heat exchanger.

[0009] In some embodiments, the air pipe structure includes: an air collecting pipe; an air intake pipe connected to the air collecting pipe; an air pipe conducting component, arranged on the air collecting pipe, including a first conducting inlet end and a first conducting outflow end, and one side of the first conducting outflow end of the air collecting pipe is connected to the air intake pipe, and a first air pipe branch pipe is connected to one side of the first conducting outflow end of the air collecting pipe, wherein the first air pipe branch pipe is provided with a resistance pipe section for increasing the flow resistance of the refrigerant.

[0010] In some optional embodiments, the first air pipe branch includes a first air pipe connecting section connected to the air collecting pipe, and a second air pipe connecting section for connecting to the heat exchange flow path, wherein the resistance pipe section is arranged in the first air pipe connecting section.

[0011] In some optional embodiments, the resistance tube segment includes a bent segment, wherein the bent segment includes an extending segment extending into the gas collecting pipe and extending upward along the axial direction of the gas collecting pipe.

[0012] In some optional embodiments, the resistance pipe section includes an inclined section, wherein the inclined section includes a first inclined end connected to the gas collecting pipe, and a second inclined end opposite to the first inclined end, and the inclined section is inclined upward from the second inclined end to the first inclined end.

[0013] In some optional embodiments, the angle between the inclined section and the vertical direction is a, wherein 45°≤a<90°.

[0014] In some optional embodiments, the first tracheal branch further includes: a vertical connecting section connected between the first tracheal connecting section and the second tracheal connecting section.

[0015] In some optional embodiments, the air pipe structure further includes: a second air pipe branch pipe connected to one side of the first conductive inflow end of the air collecting pipe; and a third air pipe branch pipe connected to one side of the first conductive inflow end of the air collecting pipe.

[0016] In some embodiments, the variable split heat exchanger includes: the air pipe structure as described above; and a plurality of heat exchange flow paths, each heat exchange flow path being connected to the air collecting pipe of the air pipe structure through an air pipe branch pipe.

[0017] In some optional embodiments, the variable split heat exchanger also includes a liquid pipe structure, the liquid pipe structure includes a collecting pipe, a liquid pipe conducting component, a first branch pipe, a second branch pipe and a third branch pipe, the liquid pipe conducting component is arranged on the collecting pipe, including a second conducting inlet end and a second conducting outflow end, the first branch pipe is arranged on the side of the second conducting inlet end of the collecting pipe, and the second branch pipe and the third branch pipe are arranged on the side of the second conducting outflow end of the collecting pipe, wherein the multiple heat exchange flow paths include a first heat exchange flow path, a second heat exchange flow path and a third heat exchange flow path, and the first heat exchange flow path is connected between the first branch pipe and the third air pipe branch pipe, the second heat exchange flow path is connected between the second branch pipe and the second air pipe branch pipe, and the third heat exchange flow path is connected between the third branch pipe and the first air pipe branch pipe.

[0018] In some embodiments, an air conditioner includes a variable split heat exchanger as described above.

[0019] The air pipe structure, variable split heat exchanger and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The air pipe structure provided by the embodiment of the present disclosure includes an air collecting pipe, an air intake pipe, an air pipe conducting component and a first air pipe branch, wherein the first air pipe branch is provided with a resistance pipe section for increasing the flow resistance of the refrigerant. The resistance pipe section is provided to increase the resistance of the refrigerant flowing through the first air pipe branch, and then the resistance pipe section is used to appropriately reduce the amount of refrigerant flowing through the heat exchange flow path of the first air pipe branch, and appropriately increase the amount of refrigerant flowing through other heat exchange flow paths, thereby balancing the amount of refrigerant in multiple heat exchange flow paths of the entire heat exchanger, and improving the heat exchange effect of the heat exchanger.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of a trachea structure provided by an embodiment of the present disclosure;

[0024] Figure 2 yes Figure 1 Improved diagram of selected parts;

[0025] Figure 3 yes Figure 1 Another improved diagram of the selected part;

[0026] Figure 4 yes Figure 1 Another improved diagram of the selected part;

[0027] Figure 5 is a structural schematic diagram of a liquid pipe structure provided by an embodiment of the present disclosure;

[0028] Figure 6 is a structural schematic diagram of another liquid pipe structure provided by an embodiment of the present disclosure;

[0029] Figure 7 is a schematic structural diagram of a variable split flow heat exchanger provided by an embodiment of the present disclosure;

[0030] Figure 8 is a flow diagram of the refrigerant when the variable split flow heat exchanger provided by the embodiment of the present disclosure is used as an evaporator;

[0031] Fig. 9 It is a flow diagram of the refrigerant when the variable split heat exchanger provided in the embodiment of the present disclosure is used as a condenser.

[0032] Reference numerals:

[0033] 100, collecting pipe; 101, closing structure; 110, liquid inlet pipe; 120, first branch pipe; 130, liquid pipe conducting component; 140, second branch pipe; 141, first connecting pipe; 142, third connecting pipe; 150, third branch pipe; 151, second connecting pipe; 152, fourth connecting pipe; 153, fifth connecting pipe; 200, air collecting pipe; 210, air inlet pipe; 220, air pipe conducting component; 230, first air pipe branch pipe; 231, second air pipe connecting section; 232, first air pipe connecting section; 2321, extending section; 233, vertical connecting section; 240, second air pipe branch pipe; 250, third air pipe branch pipe; 300, heat exchange pipe; 301, heat exchange fin; 310, first heat exchange flow path; 320, second heat exchange flow path; 330, third heat exchange flow path. DETAILED DESCRIPTION

[0034] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0035] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0038] Unless otherwise stated, the term "plurality" means two or more.

[0039] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0040] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0042] The embodiment of the present disclosure provides an air pipe structure, including an air collecting pipe 200, an air inlet pipe 210, an air pipe conducting component 220 and a first air pipe branch pipe 230. The air inlet pipe 210 is connected to the air collecting pipe 200, the air pipe conducting component 220 is arranged on the air collecting pipe 200, and includes a first conducting inflow end and a first conducting outflow end, and one side of the first conducting outflow end of the air collecting pipe 200 is connected to the air inlet pipe 210, and the first air pipe branch pipe 230 is connected to one side of the first conducting outflow end of the air collecting pipe 200, wherein the first air pipe branch pipe 230 is provided with a resistance pipe section for increasing the flow resistance of the refrigerant.

[0043] The heat exchanger includes a first heat exchange flow path 310, a second heat exchange flow path 320 and a third heat exchange flow path 330, and the first air pipe branch 230 is connected to the third heat exchange flow path 330. Since the refrigerant flowing out of the second heat exchange flow path 320 needs to break through the flow resistance brought by the air pipe conductive component 220, the amount of refrigerant required for the second heat exchange flow path 320 is relatively large. In the current heat exchanger, the amount of refrigerant allocated to the third heat exchange flow path 330 is relatively large, and the amount of refrigerant allocated to the second heat exchange flow path 320 is relatively small, so the difference in the amount of refrigerant between the two heat exchange flow paths is very large.

[0044] In the air pipe structure provided in the embodiment of the present disclosure, a resistance pipe section is provided in the first air pipe branch 230, thereby increasing the refrigerant flow resistance of the third heat exchange flow path 330 connected to the first air pipe branch 230, thereby appropriately reducing the refrigerant amount of the third heat exchange flow path 330, appropriately increasing the refrigerant amount of the second heat exchange flow path 320, and thereby reducing the difference in the refrigerant amount between the two heat exchange flow paths.

[0045] It can be seen that in the air pipe structure provided by the embodiment of the present disclosure, the setting of the resistance pipe section in the first air pipe branch 230 reduces the difference in the amount of refrigerant between different heat exchange flow paths, improves the uniformity of the amount of refrigerant between the heat exchange flow paths of the heat exchanger, and thus improves the heat exchange effect of the heat exchanger.

[0046] It can be understood that the resistance pipe section is a pipe section that can increase the resistance of the refrigerant flow, and the resistance pipe section includes a bent pipe section, an inclined pipe section, a pipe section with a blocking piece on the inner wall, a pipe section with a reduced inner diameter, etc. Further, the resistance of the resistance pipe section can be adjusted by adjusting the bending angle of the bent pipe section, the number of bendings, and other parameters; similarly, the resistance of the resistance pipe section can also be adjusted by adjusting the inclination angle of the inclined pipe section, the length of the inclined pipe section, and other parameters; similarly, the resistance of the resistance pipe section can also be adjusted by adjusting the number of blocking pieces in the inner wall, and similarly, the resistance of the resistance pipe section can also be adjusted by adjusting the pipe diameter, and the length of the pipe section with a reduced inner diameter, and other parameters.

[0047] Optionally, the first air pipe branch 230 includes a first air pipe connecting section 232 connected to the air collecting pipe 200 , and a second air pipe connecting section 231 for connecting to the heat exchange flow path, wherein the resistance pipe section is arranged in the first air pipe connecting section 232 .

[0048] The resistance pipe section is arranged at the first air pipe connecting section 232 connected to the air collecting pipe 200, that is, the resistance pipe section is arranged at the part of the first air pipe branch pipe 230 close to the air collecting pipe 200. Optionally, the second air pipe connecting section 231 is linear.

[0049] Optionally, the resistance pipe section includes a bending section, wherein the bending section includes an extending section 2321 extending into the gas collecting pipe 200 and extending upward along the axial direction of the gas collecting pipe 200 .

[0050] The resistance pipe section of the bending section includes an extending section 2321 extending into the gas collecting pipe 200 and extending upward along the axial direction of the gas collecting pipe 200, such as Figure 2As shown. Compared with the method of directly connecting the first air pipe branch 230 with the air collecting pipe 200, the setting of the extended section 2321 adds another bend to the flow path of the refrigerant after entering the interior of the air collecting pipe 200, thereby increasing the flow resistance of the refrigerant in the resistance pipe section. Optionally, the inner diameter of the extended section 2321 is smaller than the inner diameter of the air collecting pipe 200, and the inner diameter of the extended section 2321 is greater than or equal to 5mm. Optionally, the length of the extended section 2321 is greater than or equal to a preset length, for example, the preset length is 10mm, thereby increasing the flow resistance of the extended section 2321 to the refrigerant.

[0051] Optionally, the resistance pipe section includes an inclined section, wherein the inclined section includes a first inclined end connected to the gas collecting pipe 200, and a second inclined end opposite to the first inclined end, and the inclined section is inclined upward from the second inclined end to the first inclined end.

[0052] The first tracheal connecting section 232 of the first tracheal branch 230 is arranged to be inclined, and is arranged to be inclined upward from the second inclined end to the first inclined end, such as Figure 3 As shown, compared with setting the first air pipe connecting section 232 to be horizontal, the inclined first air pipe connecting section 232 increases the flow resistance of the refrigerant. Optionally, the angle between the inclined section and the vertical direction is a, where 45°≤a<90°.

[0053] Optionally, the flow resistance of the first tracheal branch pipe 230 to the refrigerant can be increased by simultaneously providing the extending section 2321 and the inclined section, such as Figure 4 The extending section 2321 or the inclined section can be selected according to the required refrigerant resistance, or both the extending section 2321 and the inclined section can be provided.

[0054] Optionally, the first tracheal branch 230 further includes a vertical connecting section 233, and the vertical connecting section 233 is connected between the first tracheal connecting section 232 and the second tracheal connecting section 231. Figure 1 shown.

[0055] Optionally, the air pipe structure further includes a second air pipe branch 240 and a third air pipe branch 250. The second air pipe branch 240 is connected to one side of the first conductive inflow end of the air collecting pipe 200, and the third air pipe branch 250 is connected to one side of the first conductive inflow end of the air collecting pipe 200.

[0056] In order to further improve the consistency of the product, the first tracheal branch pipe 230, the second tracheal branch pipe 240 and the third tracheal branch pipe 250 are directly connected to the side wall of the gas collecting pipe 200. The use of tees can be further reduced, thereby reducing the setting of interfaces, simplifying the overall structure, and making the overall consistency higher.

[0057] It can be understood that the connection mode between the first air pipe branch 230, the second air pipe branch 240 and the third air pipe branch 250 and the air collecting pipe 200 is the same as the connection mode between the first branch pipe 120 and the collecting pipe 100. Using the same connection mode can simplify the process requirements.

[0058] The embodiment of the present disclosure also provides a variable flow split heat exchanger, comprising the aforementioned air pipe structure and a plurality of heat exchange paths, wherein each heat exchange path is connected to the air collecting pipe 200 of the air pipe structure through an air pipe branch pipe.

[0059] Optionally, the variable split flow heat exchanger further comprises a liquid pipe structure, the liquid pipe structure comprising a header 100, a liquid pipe conducting component 130, a first branch pipe 120, a second branch pipe 140 and a third branch pipe 150, the liquid pipe conducting component 130 is arranged on the header 100, and comprises a second conducting inlet end and a second conducting outlet end, the first branch pipe 120 is arranged on one side of the second conducting inlet end of the header 100, the second branch pipe 140 and the third branch pipe 150 are arranged on the header 100, and the liquid pipe conducting component 130 comprises a second conducting inlet end and a second conducting outlet end, the first branch pipe 120 is arranged on one side of the second conducting inlet end of the header 100, and the second branch pipe 140 and the third branch pipe 150 are arranged on the header 100. 00, wherein the plurality of heat exchange paths include a first heat exchange path 310, a second heat exchange path 320 and a third heat exchange path 330, and the first heat exchange path 310 is connected between the first branch pipe 120 and the third air duct branch pipe 250, the second heat exchange path 320 is connected between the second branch pipe 140 and the second air duct branch pipe 240, and the third heat exchange path 330 is connected between the third branch pipe 150 and the first air duct branch pipe 230.

[0060] The liquid pipe structure provided by the embodiment of the present disclosure includes a manifold 100, a second branch pipe 140 and a third branch pipe 150. The second branch pipe 140 is used to communicate with the second heat exchange flow path 320 of the heat exchanger; the third branch pipe 150 is used to communicate with the third heat exchange flow path 330 of the heat exchanger, and the connection point between the second branch pipe 140 and the manifold 100 is higher than the connection point between the third branch pipe 150 and the manifold 100, wherein the number of resistance components through which the refrigerant flows after flowing out of the second branch pipe 140 is greater than the number of resistance components through which the refrigerant flows after flowing out of the third branch pipe 150, or the refrigerant flows through at least one valve component after flowing out of the second branch pipe 140. Figure 5 and Figure 6 shown.

[0061] Optionally, the number of resistance components through which the refrigerant flows after flowing out of the second branch pipe 140 is greater than the number of resistance components through which the refrigerant flows after flowing out of the third branch pipe 150. It can be understood as follows: the resistance components may include the heat exchange tube 300 of the heat exchanger, a valve component, etc., and the valve component may be a one-way valve, a solenoid valve, a three-way valve, etc.

[0062] When the types of resistance components are the same but the resistance generated by each resistance component is different, the resistance generated by the resistance components shall be uniformly converted and then the number shall be counted. For example, the resistance component through which the refrigerant flows out of the second branch pipe 140 includes a plurality of longer heat exchange tubes, and the resistance component through which the refrigerant flows out of the third branch pipe 150 includes a plurality of shorter heat exchange tubes. Then, the plurality of longer heat exchange tubes may be folded into shorter heat exchange tubes, and then the number of the resistance components flowing through shall be counted respectively. Alternatively, when the resistance component through which the refrigerant flows out of the second branch pipe 140 includes a first valve component, and the resistance component through which the refrigerant flows out of the third branch pipe 150 includes a second valve component, and the resistance of the first valve component is greater than the resistance of the second valve component, then the resistance generated by the first valve component shall be converted into the resistance of the second valve component and then the number shall be counted. For example, if the resistance generated by the first valve component is 1.5 times that of the second valve component, then the first valve component is equivalent to 1.5 second valve components.

[0063] Similarly, when the types of resistance components are different, they can also be converted before counting. For example, the refrigerant flowing out of the second branch pipe 140 flows through 3 heat exchange tubes and 1 one-way valve, and the refrigerant flowing out of the third branch pipe 150 flows through 4 heat exchange tubes, wherein the resistance generated by 1 one-way valve is about 3 times that of 1 heat exchange tube, so 1 one-way valve is converted into 3 heat exchange tubes, and then the number of resistance components is counted separately.

[0064] Optionally, the refrigerant flows through at least one valve component after flowing out of the second branch pipe 140, which can be understood as the refrigerant at the outlet of the third branch pipe 150 does not flow through the valve component, or the number of valve components through which the refrigerant flows out of the second branch pipe 140 is greater than the number of valve components through which the refrigerant flows out of the third branch pipe 150. Other statistical methods are the same as above and will not be repeated here.

[0065] It can be understood that the number of resistance components through which the refrigerant flows after flowing out of the second branch 140 is greater than the number of resistance components through which the refrigerant flows after flowing out of the third branch 150, or the refrigerant flows through at least one valve component after flowing out of the second branch 140, so that the pressure drop or pressure loss of the refrigerant after flowing out of the second branch 140 is greater than the pressure drop or pressure loss of the refrigerant after flowing out of the third branch 150.

[0066] Optionally, the path of the refrigerant after flowing out of the second branch pipe 140 can be understood as the path from flowing out of the second branch pipe 140 to converging with the refrigerant after flowing out of the third branch pipe 150. Similarly, the path of the refrigerant after flowing out of the third branch pipe 150 can be understood as the path from the third branch pipe 150 to converging with the refrigerant after flowing out of the second branch pipe 140. Optionally, the confluence of the two can be the air inlet pipe 210 of the air pipe structure.

[0067] The liquid pipe structure of the variable flow split heat exchanger is provided with a liquid pipe conducting component 130. When the air conditioner is in heating mode, the refrigerant enters the liquid pipe structure and after passing through the liquid pipe conducting component 130, it needs to be split in the liquid pipe structure and flow to the second branch pipe 140 and the third branch pipe 150 respectively. However, due to the influence of the refrigerant flow pressure, the refrigerant will show an upward flow trend after passing through the liquid pipe conducting component 130, so that the liquid distribution amount of the upper branch pipe tends to be greater than the liquid distribution amount of the lower branch pipe. The liquid pipe structure provided in the embodiment of the present disclosure utilizes the upward flow trend of the refrigerant in the liquid pipe structure. The connection point between the second branch pipe 140 and the collecting pipe 100 is higher than the connection point between the third branch pipe 150 and the collecting pipe 100. In this way, under the upward flow trend of the refrigerant, the amount of refrigerant diverted by the second branch pipe 140 is greater than the amount of refrigerant diverted by the third branch pipe 150, so that the refrigerant flowing into the second branch pipe 140 can overcome the larger pressure drop or pressure loss, thereby balancing the diversion uniformity of the entire heat exchanger.

[0068] Optionally, the second branch pipe 140 includes a first connecting pipe 141 directly connected to the header 100, and the third branch pipe 150 includes a second connecting pipe 151 directly connected to the header 100, wherein the angle between the first connecting pipe 141 and the header 100 is smaller than the angle between the second connecting pipe 151 and the header 100. In this way, the refrigerant is further allowed to flow into the second branch pipe 140 preferentially during the flow process, thereby improving the uniformity of the refrigerant diversion of the variable diversion heat exchanger as a whole. Optionally, the angle between the first connecting pipe 141 and the header 100 can be greater than or equal to 0° and less than or equal to 45°, and the angle between the second connecting pipe 151 and the header 100 can be greater than 45° and less than or equal to 90°.

[0069] Optionally, the first connecting pipe 141 is connected in parallel with the port of the header 100; and / or the second connecting pipe 151 is vertically connected to the side wall of the header 100. Figure 5 In this way, the refrigerant in the manifold 100 can directly rush into the second branch pipe 140 after passing through the liquid pipe one-way valve 130, further increasing the flow rate entering the second branch pipe 140, better balancing the flow distribution effect, reducing the flow unevenness problem caused by the large pressure loss in the heat exchange flow path connected to the second branch pipe 140, and improving the overall flow distribution uniformity effect.

[0070] Optionally, the second branch pipe 140 further includes a third connecting pipe 142 for being directly connected to the second heat exchange flow path 320, and the third branch pipe 150 further includes a fourth connecting pipe 152 for being directly connected to the third heat exchange flow path 330, wherein the height of the third connecting pipe 142 is lower than the height of the fourth connecting pipe 152. In this way, the refrigerant of the second branch pipe 140 can flow into the second heat exchange flow path 320 at the lower part through the third connecting pipe 142, and the refrigerant of the third branch pipe 150 can flow into the third heat exchange flow path 330 at the upper part through the fourth connecting pipe 152.

[0071] Optionally, the third connecting pipe 142 and the fourth connecting pipe 152 are both arranged horizontally. The third branch pipe 150 further includes a fifth connecting pipe 153 connected between the second connecting pipe 151 and the fourth connecting pipe 152, wherein the fifth connecting pipe 153 is parallel to the first connecting pipe 141, and the length of the fifth connecting pipe 153 is greater than the length of the first connecting pipe 141. In this way, the second branch pipe 140 is in a right angle shape, and the third branch pipe 150 is in a U-shape with two right angles. Figure 6 shown.

[0072] Optionally, the liquid pipe structure also includes a first branch pipe 120 and a liquid pipe conducting component 130, the first branch pipe is used to be connected to the first heat exchange flow path 300 of the heat exchanger, the liquid pipe conducting component 130 is arranged on the collecting pipe 100, and includes a second conducting inlet end and a second conducting outflow end, wherein the first branch pipe 120 is arranged on the side of the second conducting inlet end of the collecting pipe 100, and the second branch pipe 140 and the third branch pipe 150 are arranged on the side of the second conducting outflow end of the collecting pipe 100.

[0073] The liquid pipe conducting component 130 includes a second conducting inlet end and a second conducting outlet end. The liquid pipe conducting component 130 divides the manifold, and the manifold includes a first manifold portion on the second conducting inlet end side and a second manifold portion on the second conducting outlet end side. The first branch pipe 120 is disposed on the first manifold portion on the second conducting inlet end side of the manifold 100, and the second branch pipe 140 and the third branch pipe 150 are disposed on the second manifold portion on the second conducting outlet end side of the manifold 100.

[0074] Optionally, an angle between projections of the liquid inlet pipe 110 and the first branch pipe 120 along the axial direction of the manifold 100 is greater than or equal to 90 degrees.

[0075] By adopting the liquid pipe structure of the heat exchanger provided in the embodiment of the present invention, by directly connecting the first branch pipe 120 to the side wall of the collecting pipe 100, there is no need to use a tee for connection, which can effectively reduce the number of interfaces and simplify the process, avoid the influence of the error of the Y-shaped tee in the production process on the connection between it and the pipeline, and keep the connection structure between the branch pipe and the collecting pipe 100 consistent, thereby improving the consistency of the product. At the same time, due to the arc structure of the liquid inlet pipe 110, centrifugal force will be generated during the process of passing the refrigerant, resulting in gas-liquid separation of the refrigerant under the action of centrifugal force, and then the part close to the outer arc of the liquid inlet pipe 110 is liquid phase refrigerant, and the part close to the inner arc is gas phase refrigerant, and the gas-liquid separation state will still continue to a certain extent after entering the collecting pipe 100. At this time, since the gas and liquid phases of the refrigerant are distributed very unevenly, it is easy to cause the liquid entering the first The refrigerant gas flow rate in one branch pipe 120 is relatively high, which in turn affects its heat exchange efficiency. By setting the first branch pipe 120 so that the angle between the projection along the axial direction of the collecting pipe 100 and the projection of the liquid inlet pipe 110 is greater than or equal to 90 degrees, under the action of the centrifugal force of the liquid inlet pipe 110, the liquid-phase refrigerant will be distributed in large quantities on the side of the collecting pipe 100 away from the liquid inlet pipe 110 after entering the collecting pipe 100. Therefore, the first branch pipe 120 is set to have an angle of more than 90 degrees relative to the liquid inlet pipe 110. The first branch pipe 120 can be connected to the side of the collecting pipe 100 away from the liquid inlet pipe 110, that is, the side where the liquid-phase refrigerant is more distributed, so that the liquid-phase refrigerant can fully flow into it, ensuring its heat exchange effect and improving the uniformity of the diversion of the liquid-phase refrigerant. The overall structure and process can be simplified and the uniformity of the diversion of the liquid-phase refrigerant can be ensured.

[0076] Among them, the liquid inlet pipe 110 includes at least one bent portion. It can be understood that since this solution is to solve the problem of uneven distribution of refrigerant gas and liquid caused by the centrifugal force of the liquid inlet, the liquid inlet pipe 110 adapted to this solution needs to have a part of the bent section so that it can change the flow direction of the internal refrigerant and produce a certain centrifugal effect on the refrigerant inside.

[0077] It can be understood that the specific shape of the liquid inlet pipe 110 is not limited, and it can be a U-shape, an L-shape, a multi-stage wavy shape, etc.

[0078] It can be understood that when the manifold 100 is arranged vertically, the conducting direction of the liquid pipe conducting component 130 is from bottom to top, and the first branch pipe 120 is arranged on the lower side of the liquid pipe conducting component 130, and the second branch pipe 140 and the third branch pipe 150 are arranged on the upper side of the liquid pipe conducting component 130.

[0079] When the heat exchanger is used as an evaporator, the refrigerant can be diverted from the first branch pipe 120, the second branch pipe 140 and the third branch pipe 150 in parallel. When the heat exchanger is used as a condenser, the refrigerant enters the collecting pipe 100 through the third branch pipe 150, and enters the second branch pipe 140 under the obstruction of the liquid pipe conducting component 130, and flows through the first branch pipe 120 and returns to the collecting pipe 100, so that the first branch pipe 120, the second branch pipe 140 and the third branch pipe 150 are connected in series to form a flow path, thereby improving the efficiency of heating and cooling.

[0080] Optionally, the projections of the second branch pipe 140 and the third branch pipe 150 along the axial direction of the header pipe 100 overlap with the projections of the first branch pipe 120 along the axial direction of the header pipe 100. In this way, on the one hand, the first branch pipe 120, the second branch pipe 140 and the third branch pipe 150 can be kept on the same vertical plane, which is convenient for connecting the heat exchange flow path, and at the same time, the influence of gas-liquid separation caused by centrifugal force on the uniformity of the refrigerant entering the second branch pipe 140 and the third branch pipe 150 can be reduced, thereby improving the uniformity of the overall refrigerant diversion.

[0081] Optionally, a connection hole is provided on the manifold 100, and the end of the first branch pipe 120 is butted against the connection hole and connected by welding. In this way, by directly welding the end of the first branch pipe 120 to the side wall of the manifold 100, the connection stability of the interface is maintained, and the structure is simplified to improve the consistency of the product.

[0082] Optionally, the diameter of the liquid inlet pipe 110 is smaller than that of the manifold 100, and one end of the liquid inlet pipe 110 is inserted into one end of the manifold 100. In this way, the diameter of the manifold 100 is set to be larger than that of the liquid inlet pipe 110. When the refrigerant is separated due to centrifugal force in the liquid inlet pipe 110, it can be fully mixed again in the manifold 100 with a larger volume, thereby improving the efficiency of the diversion when the manifold 100 is diverted to the first branch pipe 120, the second branch pipe 140, and the third branch pipe 150.

[0083] Optionally, a closing structure 101 is provided at one end of the manifold 100, and one end of the liquid inlet pipe 110 is inserted into the closing structure 101 and welded to the closing structure 101. In this way, by using the closing structure 101 at one end of the manifold 100 to insert part of the liquid inlet pipe 110 into the inside thereof and welding, the stability of the connection between the two can be improved, and the risk of refrigerant leakage can be reduced.

[0084] Optionally, the manifold 100 and the closing structure 101 are integrally formed, so as to effectively simplify the structure, reduce interfaces, improve overall consistency, and reduce overall refrigerant leakage risk.

[0085] It can be understood that the closing structure 101 is a structure in which the diameter of the mouth of the manifold 100 is gradually reduced, and it can be directly formed by the manifold 100 through processes such as stamping or spinning.

[0086] Optionally, the air pipe conducting component 220 divides the air collecting pipe 200 into a first air collecting pipe section and a second air collecting pipe section, and the first air collecting pipe section is a conducting section located in the conducting direction of the air pipe conducting component 220, located above the air pipe conducting component 220, and the second air collecting pipe section is located below the air pipe conducting component 220. The second air pipe branch 240 and the third air pipe branch 250 are both arranged in the second air collecting pipe section. When the air conditioner operates in the heating mode, the refrigerant flowing out through the second air pipe branch 240 and the third air pipe branch 250 needs to flush the air pipe conducting component 220 and then flow upwards and flow out through the air inlet pipe 210.

[0087] The variable split flow heat exchanger provided in the embodiment of the present disclosure also includes a plurality of heat exchange paths, including a first heat exchange path 310, a second heat exchange path 320, and a third heat exchange path 330. In this way, a complete variable split flow heat exchange structure can be formed, so that the variable split flow heat exchanger can have different flow paths under cooling and heating conditions, better balance the different requirements for refrigerant flow paths under cooling and heating conditions, and improve the heat exchange efficiency of the heat exchanger under cooling and heating conditions.

[0088] When the first air branch 230, the second air branch 240 and the third air branch 250 converge into the collecting pipe 200 at the same time, the air pipe conducting component 220 can be conducted to directly discharge the refrigerant through the intake pipe 210, which is conducive to the side-by-side circulation of multiple heat exchange flow paths. On the contrary, when the refrigerant flows into the collecting pipe 200 from the intake pipe 210, the air pipe conducting component 220 can be closed, so that the refrigerant first passes through the first air branch 230 and then through the second air branch 240 and finally through the third air branch 250, forming a series of heat exchange flow paths, thereby having different numbers of heat exchange flow paths under cooling and heating conditions, better meeting the different requirements of cooling conditions and cooling conditions for the number of heat exchange flow paths, and improving the overall performance of the variable split heat exchanger.

[0089] The first heat exchange flow path 310 is connected between the first branch pipe 120 and the third air pipe branch pipe 250, the second heat exchange flow path 320 is connected between the second branch pipe 140 and the second air pipe branch pipe 240, and the third heat exchange flow path 330 is connected between the third branch pipe 150 and the first air pipe branch pipe 230. In this way, by providing a plurality of heat exchange flow paths respectively correspondingly arranged between the branch pipes and the air pipe branches, different flow paths can be generated under cooling conditions and heating conditions, thereby improving the overall performance of the variable split heat exchanger.

[0090] Optionally, the first heat exchange flow path 310, the second heat exchange flow path 320 and the third heat exchange flow path 330 are all formed by a plurality of heat exchange tubes 300 connected in series, and the first heat exchange flow path 310, the second heat exchange flow path 320 and the third heat exchange flow path 330 are all provided in the same set of heat exchange fins 301. The overall consistency of the variable split heat exchanger can be maintained, and the same set of heat exchange fins 301 can be connected to further improve the heat exchange efficiency of the variable split heat exchanger.

[0091] Optionally, the first heat exchange flow path 310, the second heat exchange flow path 320 and the third heat exchange flow path 330 are arranged in sequence from bottom to top in the vertical direction. In this way, the first heat exchange flow path 310, the second heat exchange flow path 320 and the third heat exchange flow path 330 are vertically distributed, and the influence of gravity on the refrigerant can be used to further reduce the amount of refrigerant entering the third heat exchange flow path 330 under heating conditions, balance the influence of pressure loss caused by the need to pass through the air pipe conductive component 220 in the second heat exchange flow path 320 and the first heat exchange flow path 310, and improve the uniformity of the diversion.

[0092] Combination Figure 8 As shown, in the case where the variable split heat exchanger is used as an evaporator, the liquid refrigerant enters the collecting pipe 100 through the liquid inlet pipe 110, and the liquid pipe conducting component 130 is conducted under the action of pressure. At this time, the refrigerant enters the first branch pipe 120, the second branch pipe 140 and the third branch pipe 150 at the same time, and passes through the first heat exchange flow path 310, the second heat exchange flow path 320 and the third heat exchange flow path 330 side by side, and then enters the collecting pipe 200 through the first air pipe branch pipe 230, the second air pipe branch pipe 240 and the third air pipe branch pipe 250 respectively. At this time, the air pipe conducting component 220 in the collecting pipe 200 is also in a conducting state. The refrigerant refluxes in the collecting pipe 200 and is discharged through the air inlet pipe 210, so that three parallel flow paths can be formed for heat exchange, which greatly reduces the pressure drop while ensuring the heat transfer coefficient, thereby increasing the system pressure and thus increasing the low-temperature heating capacity.

[0093] Combination Fig. 9As shown, in the case where the variable split heat exchanger is used as a condenser, the gas phase refrigerant enters the collecting pipe 200 through the inlet pipe 210. At this time, under the pressure of the refrigerant, the air pipe conducting component 220 is in a non-conducting state. After the refrigerant enters the collecting pipe 200 and is in the upper half of the air pipe conducting component 220, it flows into the third heat exchange flow path 330 through the first air pipe branch pipe 230 for heat exchange, and then flows into the collecting pipe 100 through the third branch pipe 150. At this time, the liquid pipe conducting component 130 in the collecting pipe 100 is also in a non-conducting state under the action of pressure. The refrigerant continues to enter the second branch pipe 140 and flows into the second heat exchange flow path 330. After heat exchange in the first heat exchange flow path 320, the heat exchange flow flows into the lower half of the collecting pipe 200 at the lower side of the air pipe conducting component 220 through the second air pipe branch 240, and continues to flow into the third air pipe branch 250 from this part, and after heat exchange in the first heat exchange flow path 310, it flows into the part of the collecting pipe 100 at the lower side of the liquid pipe conducting component 130 through the first branch pipe 120, and finally flows out from the liquid inlet pipe 110, thereby forming a whole heat exchange flow path connecting the first heat exchange flow path 310, the second heat exchange flow path 320 and the third heat exchange flow path 330 in series, thereby accelerating the circulation and increasing the heat transfer coefficient, thereby improving the high-temperature cooling capacity.

[0094] In some embodiments, an air conditioner includes the variable split heat exchanger described above.

[0095] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A trachea structure, characterized in that: include: Gas collecting pipe (200); An air intake pipe (210) is connected to the air collecting pipe (200); The air pipe conducting component (220) is arranged on the air collecting pipe (200), and comprises a first conducting inflow end and a first conducting outflow end, and one side of the first conducting outflow end of the air collecting pipe (200) is connected to the air inlet pipe (210). The first air pipe branch (230) is connected to one side of the first conductive outflow end of the air collecting pipe (200). The first air pipe branch (230) is provided with a resistance pipe section for increasing the flow resistance of the refrigerant.

2. The tracheal structure according to claim 1, characterized in that: The first air pipe branch (230) comprises a first air pipe connecting section (232) connected to the air collecting pipe (200), and a second air pipe connecting section (231) for connecting to the heat exchange flow path. Wherein, the resistance pipe section is arranged at the first air pipe connecting section (232).

3. The tracheal structure according to claim 2, characterized in that: The resistance pipe section includes a bending section, The bent section includes an extending section (2321) extending into the gas collecting pipe (200) and extending upward along the axial direction of the gas collecting pipe (200).

4. The tracheal structure according to claim 2 or 3, characterized in that: The resistance pipe section includes an inclined section, The inclined section comprises a first inclined end connected to the gas collecting pipe (200), and a second inclined end opposite to the first inclined end, and the inclined section is arranged to be inclined upward from the second inclined end to the first inclined end.

5. The tracheal structure according to claim 4, characterized in that: The angle between the inclined section and the vertical direction is a. Among them, 45°≤a<90°.

6. The tracheal structure according to claim 5, characterized in that: The first tracheal branch (230) further comprises: The vertical connecting section (233) is connected between the first air pipe connecting section (232) and the second air pipe connecting section (231).

7. The tracheal structure according to claim 6, characterized in that: Also includes: A second air pipe branch (240) is connected to one side of the first conductive inflow end of the air collecting pipe (200); and, The third gas pipe branch (250) is connected to one side of the first conductive inflow end of the gas collecting pipe (200).

8. A variable split flow heat exchanger, characterized in that: include: The trachea structure according to any one of claims 1 to 7; and, A plurality of heat exchange flow paths, each heat exchange flow path is connected to the gas collecting pipe (200) of the gas pipe structure through the gas pipe branch pipe.

9. The variable split heat exchanger according to claim 8, characterized in that: The invention also comprises a liquid pipe structure, the liquid pipe structure comprising a header (100), a liquid pipe conducting component (130), a first branch pipe (120), a second branch pipe (140) and a third branch pipe (150); the liquid pipe conducting component (130) is arranged on the header (100) and comprises a second conducting inlet end and a second conducting outlet end; the first branch pipe (120) is arranged on one side of the second conducting inlet end of the header (100); the second branch pipe (140) and the third branch pipe (150) are arranged on one side of the second conducting outlet end of the header (100); The plurality of heat exchange flow paths include a first heat exchange flow path (310), a second heat exchange flow path (320) and a third heat exchange flow path (330), and the first heat exchange flow path (310) is connected between the first branch pipe (120) and the third airway branch pipe (250), the second heat exchange flow path (320) is connected between the second branch pipe (140) and the second airway branch pipe (240), and the third heat exchange flow path (330) is connected between the third branch pipe (150) and the first airway branch pipe (230).

10. An air conditioner, characterized in that: Comprising the variable split heat exchanger as claimed in claim 8 or 9.

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