Variable shunting heat exchanger and air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, and discloses a variable flow dividing heat exchanger which comprises a heat exchange pipe set and an air pipe component communicating with the heat exchange pipe set, the heat exchange pipe set comprises a first heat exchange branch and a second heat exchange branch, and the air pipe component comprises an air collecting pipe; the gas pipe conducting component is communicated with the gas collecting pipe; the first gas pipe branch pipe is communicated with a first heat exchange branch of the heat exchanger, and is communicated with one side of a gas valve conduction inflow end of a gas pipe conduction component arranged on the gas collecting pipe; and the second air pipe branch pipe is communicated with a second heat exchange branch of the heat exchanger, is communicated with one side of the air valve conduction inflow end of the air pipe conduction component arranged on the air collecting pipe, and is arranged at the upper part of the first air pipe branch pipe. The flowing direction of the refrigerant in the second air pipe branch pipe is the first direction, the flowing direction of the refrigerant in the air collecting pipe is the second direction, and the first direction is not parallel to the second direction. The utility model further provides the variable flow dividing heat exchanger and an air conditioning system.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, for example, to a variable split heat exchanger and an air conditioning system. Background Art

[0002] The heat exchanger is usually provided with headers such as gas pipes and liquid pipes to divert or merge the refrigerant flowing into or out of different heat exchange branches of the heat exchanger.

[0003] The variable split heat exchanger can have different connection modes for different heat exchange branches in different operation modes. When the variable split heat exchanger is used as an evaporator, at least some of the heat exchange branches are connected in parallel; when the variable split heat exchanger is used as a condenser, at least some of the heat exchange branches are connected in series. In this way, the variable split heat exchanger has a higher heat exchange efficiency in different operation 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 existing heat exchanger header has the phenomenon of uneven liquid distribution, which affects the heat exchange effect 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 a variable split flow heat exchanger and an air conditioning system to solve the problem that different refrigerant distribution amounts in different heat exchange branches of the heat exchanger affect the heat exchange efficiency of the heat exchanger.

[0009] In some embodiments, the variable split heat exchanger includes a heat exchange tube group and an air pipe component connected to the heat exchange tube group, the heat exchange tube group includes a first heat exchange branch and a second heat exchange branch, the air pipe component includes: an air collecting pipe; an air pipe conducting component connected to the air collecting pipe, the air pipe conducting component includes an air valve conducting inlet end and an air valve conducting outflow end; a first air pipe branch connected to the first heat exchange branch of the heat exchanger and connected to the air valve conducting inlet end side of the air pipe conducting component disposed in the air collecting pipe; and, a second air pipe branch connected to the second heat exchange branch of the heat exchanger and connected to the air valve conducting inlet end side of the air pipe conducting component disposed in the air collecting pipe, and the second air pipe branch is disposed at the upper part of the first air pipe branch. Wherein, the flow direction of the refrigerant in the second air pipe branch is the first direction, the flow direction of the refrigerant in the air collecting pipe is the second direction, and the first direction is non-parallel to the second direction.

[0010] In some optional embodiments, the second trachea branch includes a branch pipe end connected to the air collecting pipe, wherein an angle between the branch pipe end and the air collecting pipe is a, and 45°≤a≤90°.

[0011] In some optional embodiments, the first tracheal branch is a right-angle bent branch.

[0012] In some optional embodiments, the heat exchange tube group also includes a third heat exchange branch and a fourth heat exchange branch, and the air pipe component also includes a third air pipe branch and a fourth air pipe branch, wherein the third air pipe branch is connected to the third heat exchange branch and is connected to the side of the air valve conduction outflow end of the air pipe conduction component arranged in the air collecting pipe; the fourth air pipe branch is connected to the fourth heat exchange branch and is connected to the side of the air valve conduction outflow end of the air pipe conduction component arranged in the air collecting pipe; and the third air pipe branch is arranged at the lower part of the fourth air pipe branch.

[0013] In some optional embodiments, the distance between the third tracheal branch and the fourth tracheal branch is less than or equal to the first preset distance M1.

[0014] In some optional embodiments, M1≤50 mm.

[0015] In some optional embodiments, the variable split heat exchanger further includes: a liquid pipe component, wherein the liquid pipe component includes: a liquid collecting pipe; a liquid pipe conducting component connected to the liquid collecting pipe, the liquid pipe conducting component including a liquid valve conducting inlet end and a liquid valve conducting outflow end; a first liquid pipe branch connected to the first heat exchange branch of the heat exchanger and connected to the liquid valve conducting inlet end side of the liquid pipe conducting component arranged in the liquid collecting pipe; a second liquid pipe branch connected to the second heat exchange branch of the heat exchanger and connected to the liquid valve conducting outflow end side of the liquid pipe conducting component arranged in the liquid collecting pipe; a third liquid pipe branch connected to the third heat exchange branch of the heat exchanger and connected to the liquid valve conducting outflow end side of the liquid pipe conducting component arranged in the liquid collecting pipe; and a fourth liquid pipe branch connected to the fourth heat exchange branch of the heat exchanger and connected to the liquid valve conducting outflow end side of the liquid pipe conducting component arranged in the liquid collecting pipe, wherein the second liquid pipe branch is a bent branch.

[0016] In some optional embodiments, the liquid pipe component further includes: a main pipe section connected to the liquid collecting pipe, and the third liquid pipe branch and the fourth liquid pipe branch are respectively connected to the main pipe section, wherein the distance between the main pipe section and the second liquid pipe branch is less than or equal to the second preset distance M2.

[0017] In some optional embodiments, M2≤50mm.

[0018] In some optional embodiments, the main pipe section includes a first main pipe connecting end connected to the liquid collecting pipe, and a second main pipe connecting end connected to the third liquid pipe branch and the fourth liquid pipe branch, wherein the distance between the first main pipe connecting end and the second main pipe connecting end is H1, 15mm≤H1≤70mm; and / or, the third liquid pipe branch includes a first connecting end connected to the third heat exchange branch, and the shortest distance between the first connecting end and the outer wall of the liquid collecting pipe is H2, 25mm≤H2≤90mm; and / or, the fourth liquid pipe branch includes a second connecting end connected to the fourth heat exchange branch, and the shortest distance between the second connecting end and the outer wall of the liquid collecting pipe is H3, 25mm≤H3≤90mm.

[0019] In some optional embodiments, the liquid pipe component further includes a discrete element disposed in a path through which the refrigerant flows, and configured to discretely distribute the refrigerant flowing into the liquid collecting pipe.

[0020] In some optional embodiments, the liquid pipe component also includes a liquid pipe inlet pipe, including a separation pipe section and an outflow pipe section that are interconnected, the outflow pipe section is connected to the liquid collecting pipe, the discrete element is arranged in the outflow pipe section, the refrigerant enters the outflow pipe section after passing through the separation pipe section, and enters the liquid collecting pipe through the discrete element.

[0021] In some optional embodiments, the distance between the bottom end of the discrete element and the bottom end of the separation pipe segment is h1, h1≥50mm; and / or, the distance between the first connection point between the separation pipe segment and the outflow pipe segment and the bottom end of the discrete element is h2, h2≥5mm.

[0022] In some embodiments, an air conditioning system includes a variable split heat exchanger as described above.

[0023] The variable split flow heat exchanger and air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0024] The variable split flow heat exchanger provided by the embodiment of the present disclosure includes a heat exchange tube group and an air pipe component connected to the heat exchange tube group. The heat exchange tube group includes a first heat exchange branch and a second heat exchange branch, and the air pipe component includes an air collecting pipe, an air pipe conducting component, a first air pipe branch and a second air pipe branch. The air pipe conducting component is connected to the air collecting pipe, and the air pipe conducting component includes an air valve conducting inlet end and an air valve conducting outflow end. The first air pipe branch is connected to the first heat exchange branch of the heat exchanger and is connected to the air valve conducting inlet end side of the air pipe conducting component arranged in the air collecting pipe, and the second air pipe branch is arranged on the upper part of the first air pipe branch. Among them, the flow direction of the refrigerant in the second air pipe branch is the first direction, and the flow direction of the refrigerant in the air collecting pipe is the second direction, and the first direction is non-parallel to the second direction.

[0025] The first air pipe branch and the second air pipe branch are both arranged on one side of the air valve conduction inflow end of the air pipe conduction component of the air collecting pipe, so that the refrigerant flowing out through the first air pipe branch and the second air pipe branch needs to overcome the resistance brought by the air pipe conduction component before flowing out of the air collecting pipe.

[0026] Compared with the Z-shaped air duct branch, the flow direction of the refrigerant in the second air duct branch provided in the embodiment of the present disclosure is not parallel to the flow direction of the refrigerant in the collecting pipe. In this way, the refrigerant in the second air duct branch does not need to pass through the Z-shaped bend, thereby reducing the flow resistance of the refrigerant, thereby appropriately increasing the refrigerant amount in the second heat exchange branch connected to the second air duct branch, and improving the uniformity of the refrigerant amount between different heat exchange branches of the heat exchanger.

[0027] 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

[0028] 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:

[0029] Figure 1is a structural schematic diagram of a variable split flow heat exchanger provided by an embodiment of the present disclosure;

[0030] Figure 2 is a schematic structural diagram of another variable split heat exchanger provided by an embodiment of the present disclosure;

[0031] Figure 3 is a schematic structural diagram of a trachea component provided by an embodiment of the present disclosure;

[0032] Figure 4 is a schematic structural diagram of another variable split heat exchanger provided by an embodiment of the present disclosure;

[0033] Figure 5 is a structural schematic diagram of a liquid pipe component provided by an embodiment of the present disclosure;

[0034] Figure 6 yes Figure 5 An enlarged view of part A;

[0035] Figure 7 yes Figure 5 Another enlarged view of part A in the middle;

[0036] Figure 8 yes Figure 5 An enlarged view of part B;

[0037] Fig. 9 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;

[0038] Fig.10 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.

[0039] Reference numerals:

[0040] 100: tracheal component; 101: first tracheal branch; 102: second tracheal branch; 1021: branch end; 103: third tracheal branch; 104: fourth tracheal branch; 105: air collecting pipe; 106: tracheal conducting component;

[0041] 200: liquid pipe component; 201: first liquid pipe branch; 202: second liquid pipe branch; 203: third liquid pipe branch; 204: fourth liquid pipe branch; 205: liquid collecting pipe; 206: liquid pipe conducting component; 207: main pipe section; 2071: first main pipe connecting end; 2072: second main pipe connecting end; 208: discrete element; 209: separation pipe section; 210: outflow pipe section; 2091: first connecting point;

[0042] 31: first heat exchange branch; 32: second heat exchange branch; 33: third heat exchange branch; 34: fourth heat exchange branch. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 the specific circumstances.

[0047] Unless otherwise stated, the term "plurality" means two or more.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] An embodiment of the present disclosure provides a variable split heat exchanger.

[0052] Optionally, the variable split heat exchanger includes a heat exchange tube group and an air pipe component 100 connected to the heat exchange tube group, the heat exchange tube group includes a first heat exchange branch 31 and a second heat exchange branch 32, and the air pipe component 100 includes an air collecting pipe 105, an air pipe conducting component 106, a first air pipe branch 101 and a second air pipe branch 102. The air pipe conducting component 106 is connected to the air collecting pipe 105, and the air pipe conducting component 106 includes an air valve conducting inlet end and an air valve conducting outflow end. The first air pipe branch 101 is connected to the first heat exchange branch 31 of the heat exchanger, and is connected to the air valve conducting inlet end side of the air pipe conducting component 106 disposed in the air collecting pipe 105. The second air pipe branch 102 is connected to the second heat exchange branch 32 of the heat exchanger, and is connected to the air valve conducting inlet end side of the air pipe conducting component 106 disposed in the air collecting pipe 105. Moreover, the second air pipe branch 102 is disposed at the upper part of the first air pipe branch 101. The flow direction of the refrigerant in the second air pipe branch 102 is the first direction, and the flow direction of the refrigerant in the air collecting pipe 105 is the second direction, and the first direction is non-parallel to the second direction.

[0053] It can be understood that the first direction of the refrigerant flowing in the second air branch pipe 102 and the second direction of the refrigerant flowing in the air collecting pipe 105 are both flow directions when the variable split heat exchanger is used as an evaporator.

[0054] Optionally, the second direction of the refrigerant flowing in the manifold 105 may be vertically upward. The first direction of the refrigerant flowing in the second branch pipe 102 may change with the shape of the second branch pipe 102. However, no matter how the first direction changes, the first direction is always non-parallel to the second direction.

[0055] The first air pipe branch 101 and the second air pipe branch 102 are both connected to the air valve conduction inlet end of the air pipe conduction component 106 arranged in the air collecting pipe 105. In this way, the refrigerant flowing out through the first air pipe branch 101 and the second air pipe branch 102 must overcome the resistance of the air pipe conduction component 106 before flowing out through the air collecting pipe 105.

[0056] In particular, the other end of the second heat exchange branch 32 is connected to the second liquid pipe branch 202 of the liquid pipe component 200, and the second liquid pipe branch 202 is arranged at the liquid valve conduction outflow end of the liquid pipe conducting component 206. In this way, when the variable split heat exchanger is used as an evaporator, the refrigerant flowing into the collecting pipe 205 also needs to overcome the resistance of the liquid pipe conducting component 206, further reducing the amount of refrigerant in the second heat exchange branch 32.

[0057] Compared with the Z-shaped air pipe branch, the flow direction of the refrigerant in the second air pipe branch 102 provided in the embodiment of the present disclosure is not parallel to the flow direction of the refrigerant in the air collecting pipe, so that the refrigerant in the second air pipe branch 102 does not need to pass through the Z-shaped bend, reducing the flow resistance of the refrigerant, thereby appropriately increasing the refrigerant amount of the second heat exchange branch 32 connected to the second air pipe branch 102. Figure 3 shown.

[0058] Optionally, the second tracheal branch pipe 102 includes a branch pipe end 1021 connected to the gas collecting pipe 105. The angle between the branch pipe end 1021 and the gas collecting pipe 105 is a, and 45°≤a≤90°. Optionally, the branch pipe end 1021 is perpendicular to the gas collecting pipe 105, that is, the angle a between the branch pipe end 1021 and the gas collecting pipe 105 is 90 degrees.

[0059] Optionally, the first tracheal branch 101 is a right-angle bent branch.

[0060] The first gas pipe branch 101 connected to the first heat exchange branch 31 may be a right-angled branch having a right-angled bend.

[0061] Optionally, the heat exchange tube group also includes a third heat exchange branch 33 and a fourth heat exchange branch 34, and the air pipe component 100 also includes a third air pipe branch 103 and a fourth air pipe branch 104, wherein the third air pipe branch 103 is connected to the third heat exchange branch 33, and is connected to the side of the air valve conduction outflow end of the air pipe conduction component 106 arranged in the air collecting pipe 105; the fourth air pipe branch 104 is connected to the fourth heat exchange branch 34, and is connected to the side of the air valve conduction outflow end of the air pipe conduction component 106 arranged in the air collecting pipe 105; and the third air pipe branch 103 is arranged at the lower part of the fourth air pipe branch 104.

[0062] The following Table 1 shows the outlet temperatures of the first heat exchange branch 31, the second heat exchange branch 32, the third heat exchange branch 33 and the fourth heat exchange branch 34 when the second air pipe branch 102 has different shapes and structures, the variable split heat exchanger is used as an evaporator, and the air-conditioning system is under rated heating conditions.

[0063]

[0064] Table 1

[0065] It can be seen from Table 1 that under the rated heating condition, when the shape of the second air pipe branch is Z-shaped, the second air pipe branch has two bending sections, the outlet temperature of the second heat exchange branch 32 is relatively high, which is 4.7°C, and the maximum temperature difference between different heat exchange branches is 4.8°C, and the amount of refrigerant in different heat exchange branches of the heat exchanger is quite different. When the flow direction of the refrigerant in the second air pipe branch 102 is the first direction, the flow direction of the refrigerant in the collecting pipe 105 is the second direction, and the angle between the first direction and the second direction is always 90°, the outlet temperature of the second heat exchange branch 32 is reduced to 3.2°C, and the maximum temperature difference between different heat exchange branches is 1.6°C, the difference in the cold amount in different heat exchange branches of the heat exchanger is reduced, the heat exchange uniformity of different heat exchange branches of the heat exchanger is improved, and the overall heat exchange efficiency of the heat exchanger is improved.

[0066] Optionally, the distance m1 between the third tracheal branch 103 and the fourth tracheal branch 104 is less than or equal to the first preset distance M1. M1≤50mm. Optionally, the distance m1 between the third tracheal branch 103 and the fourth tracheal branch 104 may be 15-25mm, such as Figure 3 shown.

[0067] Optionally, the variable flow split heat exchanger further includes a liquid pipe component 200, wherein the liquid pipe component 200 includes a liquid collecting pipe 205, a liquid pipe conducting component 206, a first liquid pipe branch 201, a second liquid pipe branch 202, a third liquid pipe branch 203, and a fourth liquid pipe branch 204. The liquid pipe conducting component 206 is connected to the liquid collecting pipe 205, and the liquid pipe conducting component 206 includes a liquid valve conducting inlet end and a liquid valve conducting outlet end. The first liquid pipe branch 201 is connected to the first heat exchange branch 31 of the heat exchanger, and is connected to the liquid valve conducting inlet end side of the liquid pipe conducting component 206 disposed in the liquid collecting pipe 205. The second liquid pipe branch 202 is connected to the second heat exchange branch 32 of the heat exchanger, and is connected to the liquid pipe conducting component disposed in the liquid collecting pipe 205. The third liquid pipe branch 203 is connected to the third heat exchange branch 33 of the heat exchanger, and is connected to the liquid valve conduction outflow side of the liquid pipe conduction component 206 disposed in the liquid collecting pipe 205, and the fourth liquid pipe branch 204 is connected to the fourth heat exchange branch 34 of the heat exchanger, and is connected to the liquid valve conduction outflow side of the liquid pipe conduction component 206 disposed in the liquid collecting pipe 205, wherein the second liquid pipe branch 202 is a bent branch. Optionally, the second liquid pipe branch 202 is a bent branch including two bent sections, such as Figure 5 shown.

[0068] In the variable flow split heat exchanger provided in the embodiment of the present disclosure, the gas collecting pipe 105 is provided with a gas pipe conducting component 106, and the liquid collecting pipe 205 is provided with a liquid pipe conducting component 206. Optionally, the gas pipe conducting component 106 is embedded in the gas collecting pipe 105, and the gas pipe conducting component 106 includes an electromagnetic one-way valve, an electromagnetic valve, a one-way conducting structure, etc. When the variable flow split heat exchanger is used as an evaporator, the gas pipe conducting component 106 is turned on, and when the variable flow split heat exchanger is used as a condenser, the gas pipe conducting component 106 is turned off.

[0069] Similarly, the liquid pipe conducting component 206 is embedded in the liquid collecting pipe 205, and the liquid pipe conducting component 206 includes an electromagnetic one-way valve, an electromagnetic valve, a one-way conducting structure, etc. When the variable split heat exchanger is used as an evaporator, the liquid pipe conducting component 206 is turned on, and when the variable split heat exchanger is used as a condenser, the liquid pipe conducting component 206 is turned off.

[0070] When the variable split flow heat exchanger provided in the embodiment of the present disclosure is used as an evaporator, the gas pipe conducting component 106 and the liquid pipe conducting component 206 are connected, and the refrigerant entering through the liquid collecting pipe 205 flows through the first heat exchange branch 31, the second heat exchange branch 32, the third heat exchange branch 33 and the fourth heat exchange branch 34 respectively. The four heat exchange branches are connected in parallel, such as Fig. 9 When the variable split flow heat exchanger is used as a condenser, the gas pipe conducting component 106 and the liquid pipe conducting component 206 are closed, and the refrigerant entering through the gas collecting pipe 105 first flows through the fourth heat exchange branch 34 and the third heat exchange branch 33, and then flows through the second heat exchange branch 32, and finally flows out after completing the heat exchange through the first heat exchange branch 31, as shown in FIG. Fig.10 shown.

[0071] Optionally, the liquid pipe member 200 further includes a main pipe section 207, the main pipe section 207 is connected to the liquid collecting pipe 205, and the third liquid pipe branch 203 and the fourth liquid pipe branch 204 are respectively connected to the main pipe section 207. The spacing m2 between the main pipe section 207 and the second liquid pipe branch 202 is less than or equal to the second preset spacing M2. M2≤50mm. Optionally, the spacing m2 between the main pipe section 207 and the second liquid pipe branch 202 may be 15-25mm.

[0072] Optionally, the main pipe section 207 includes a first main pipe connecting end 2071 connected to the collecting pipe 205, and a second main pipe connecting end 2072 connected to the third liquid pipe branch 203 and the fourth liquid pipe branch 204, wherein the distance between the first main pipe connecting end 2071 and the second main pipe connecting end 2072 is H1, 15mm≤H1≤70mm; and / or, the third liquid pipe branch 203 includes a first connecting end connected to the third heat exchange branch 33, and the shortest distance between the first connecting end and the outer wall of the collecting pipe 205 is H2, 25mm≤H2≤90mm; and / or, the fourth liquid pipe branch 204 includes a second connecting end connected to the fourth heat exchange branch 34, and the shortest distance between the second connecting end and the outer wall of the collecting pipe 205 is H3, 25mm≤H3≤90mm.

[0073] After the refrigerant flows through the main pipe section 207, it flows into the fourth liquid pipe branch 204 and the third liquid pipe branch 203 respectively. At this time, the horizontal length of the main pipe section 207 should not be too long, otherwise, too much refrigerant will be diverted to the third liquid pipe branch 203 under the action of gravity, so that too much refrigerant flows into the third heat exchange branch 33, and too little refrigerant flows into the fourth heat exchange branch 34. In the disclosed embodiment, 15mm≤H1≤70mm, so that while the refrigerant distribution amount of the third heat exchange branch 33 is increased, the amount of refrigerant in the fourth heat exchange branch 34 will not be too little. The uniformity of the refrigerant flow between the heat exchange flow paths of the heat exchanger is improved.

[0074] The first connection end can be understood as the first expansion connection end where the fourth liquid pipe branch 204 is expanded and connected to the fourth heat exchange branch 34. Similarly, the second connection end can be understood as the second expansion connection end where the third liquid pipe branch 203 is expanded and connected to the third heat exchange branch 33.

[0075] Usually, the heat exchange tubes of the heat exchange flow path of the heat exchanger are connected to the branch pipes of the manifold component by expansion welding, and during expansion welding, a closing structure is provided at the connection between the heat exchange tubes and the branch pipes to improve the connection stability between the two. The shortest distance between the first connection end or the second connection end and the outer wall of the manifold 205 should not be too large, otherwise, too much refrigerant will flow into the third heat exchange branch 33 through the third liquid pipe branch 203 under the action of gravity, and the refrigerant obtained by the fourth heat exchange branch 34 located at the upper part will be too little, thereby reducing the uniformity of the refrigerant amount between the heat exchange flow paths of the heat exchanger. The shortest distance between the first connection end and the outer wall of the manifold 205 is H2, 25mm≤H2≤90mm, and further, 35mm≤H2≤70mm. Similarly, the shortest distance between the second connection end and the outer wall of the manifold 205 is H3, 25mm≤H3≤90mm, and further, 35mm≤H3≤70mm. In this way, while increasing the refrigerant distribution amount of the third heat exchange branch 33, the amount of refrigerant in the fourth heat exchange branch 34 will not be too small, thereby improving the uniformity of the refrigerant flow between the heat exchange flow paths of the heat exchanger.

[0076] Optionally, the main pipe section 207 is arranged in the horizontal direction, so that the main pipe section 207 and the third liquid pipe branch 203 and the fourth liquid pipe branch 204 form a Y-shaped three-way pipe that is arranged transversely.

[0077] Optionally, the liquid pipe component 200 further includes a discrete element 208 disposed in a path where the refrigerant flows, and configured to discretely distribute the refrigerant flowing into the liquid collecting pipe 205 .

[0078] The liquid pipe component 200 is a flow collecting and diverting component of the heat exchanger. The refrigerant flowing into the liquid pipe component 200 can be diverted through multiple liquid pipe branches and then flow into different heat exchange branches of the variable diverting heat exchanger. Among them, liquid diversion uniformity, certainty and stability are important indicators for the liquid pipe component 200 to play a diversion role.

[0079] The liquid pipe component 200 provided in the embodiment of the present disclosure is provided with a discrete element 208 in the path of the refrigerant circulation to discretely separate the gaseous refrigerant and the liquid refrigerant flowing into the liquid collecting pipe 205, and the gas-liquid two-phase refrigerant is dispersed at the discrete element 208, thereby improving the uniformity of the gas-liquid mixing of the gas-liquid two-phase refrigerant. In this way, the certainty and accuracy of the refrigerant distribution amount when the liquid collecting pipe 205 distributes the refrigerant each time are improved, and the liquid separation effect of the liquid pipe component 200 is improved, thereby improving the heat exchange efficiency of the variable split heat exchanger and the operating stability of the air conditioning system.

[0080] Optionally, the liquid pipe component 200 also includes a liquid pipe inlet pipe, including a separation pipe section 209 and an outflow pipe section 210 that are interconnected, the outflow pipe section 210 is connected to the liquid collecting pipe 205, and the discrete element 208 is arranged in the outflow pipe section 210. The refrigerant enters the outflow pipe section 210 after passing through the separation pipe section 209, and enters the liquid collecting pipe 205 through the discrete element 208.

[0081] Optionally, the separation pipe section 209 of the liquid inlet pipe can be a U-shaped pipe. The refrigerant flows in the U-shaped separation pipe section 209, which has a certain centrifugal and accelerating effect, which is conducive to liquid separation between different branch pipes after entering the collecting pipe 205.

[0082] Taking the U-shaped separation pipe section 209 of the liquid inlet pipe as an example, after the refrigerant passes through the U-shaped separation pipe section 209, due to the centrifugal force, the liquid refrigerant in the two-phase refrigerant gathers on the outside of the U-shaped curved wall, and the gaseous refrigerant gathers in the middle of the U-shaped curved wall, forming an unevenly mixed gas-liquid two-phase state, which affects the certainty of the amount of refrigerant entering each liquid pipe branch, especially the certainty of the amount of refrigerant entering the first liquid pipe branch 201. For the first liquid pipe branch 201, it may even happen that under the same operating conditions, the amount of refrigerant flowing into the first liquid pipe branch 201 at different times varies greatly, affecting the heat exchange effect of the heat exchanger.

[0083] It can be understood that the specific shape of the liquid inlet pipe can also be an L-shape, a multi-stage wavy shape, etc.

[0084] The liquid pipe component 200 provided in the embodiment of the present disclosure and the setting of the discrete element 208 can break up the gas-liquid two-phase refrigerant flowing out of the liquid pipe inlet pipe, thereby improving the mixing uniformity of the gas-liquid two-phase refrigerant, thereby reducing the difference in the amount of refrigerant flowing into the first liquid pipe branch 201 at different times under the same working condition, improving the certainty of the amount of refrigerant flowing into the first liquid pipe branch 201, and simultaneously improving the stability of the amount of refrigerant flowing into other liquid pipe branches, thereby improving the heat exchange stability of the variable split heat exchanger.

[0085] Optionally, the discrete element 208 may be a plate-like structure with holes, or other structures, and the material of the discrete element 208 may be metal or fabric. Optionally, the discrete element 208 has a plurality of liquid equalizing holes to break up and mix the gas-liquid two-phase refrigerant. Optionally, the discrete element 208 includes a multi-layer liquid equalizing structure, and each layer of the liquid equalizing structure is provided with liquid equalizing holes, thereby improving the mixing effect of the discrete element 208 on the gas-liquid two-phase refrigerant. Optionally, the liquid equalizing holes in the multi-layer liquid equalizing structure are staggered with each other. Optionally, the liquid equalizing holes of the discrete element 208 are greater than or equal to 5 mm to prevent the liquid equalizing holes from throttling the refrigerant.

[0086] Optionally, the distance between the bottom end of the discrete element 208 and the bottom end of the separation tube section 209 is h1, and h1 ≥ 50 mm. In this way, while ensuring that the centrifugal acceleration of the separation tube section 209 and the refrigerant is fully exerted, the discrete element 208 breaks up the refrigerant after centrifugal acceleration, so that the setting of the discrete element 208 does not increase the resistance to the refrigerant separated by the separation tube section 209.

[0087] Optionally, the distance between the first connection point 2091 between the separation pipe section 209 and the outflow pipe section 210 and the bottom end of the discrete element 208 is h2, and h2 ≥ 5 mm. Figure 8 shown.

[0088] In this way, the arrangement of the discrete element 208 does not increase the resistance to the refrigerant separated and accelerated by the separation pipe section 209. Optionally, h2≥10mm, or h2≥20mm.

[0089] Optionally, the discrete element 208 includes a filter mesh. The filter mesh discrete element 208 improves the uniformity of the mixed flow of the gas-liquid two-phase refrigerant. Optionally, the shape of the filter mesh hole includes a polygonal hole shape, or the shape of the filter mesh hole is an irregular shape.

[0090] The filter screen includes a first mesh portion and a second mesh portion. The first mesh portion is connected to the inner wall of the outflow pipe section 210, and the second mesh portion is connected to the first mesh portion, and covers the first mesh portion. A preset distance is set between the second mesh portion and the inner wall of the outflow pipe section 210. It can be understood that at least part of the second mesh portion is not connected to the inner wall of the outflow pipe section 210, or all outer edges of the second mesh portion are not connected to the inner wall of the outflow pipe section 210. In this way, the mixed flow effect of the filter screen on the gas-liquid two-phase refrigerant is improved. Optionally, the first mesh portion is a horizontal mesh. The shape of the second mesh portion includes an arc, an inverted basin, an inverted angle or an irregular shape.

[0091] Optionally, a hollow portion is provided between the first net portion and the second net portion. The provision of the hollow portion reduces the pressure loss of the refrigerant flow while the first net portion and the second net portion simultaneously exert a mixed flow effect.

[0092] Optionally, the aperture of at least some of the meshes of the second mesh is smaller than the aperture of the meshes of the first mesh. For the filter mesh structure in which the second mesh is connected to the upper part of the first mesh, when the refrigerant flows through the second mesh, since the area of ​​the second mesh is larger than the area of ​​the first mesh, the second mesh has a greater mixing effect on the refrigerant, and the refrigerant will form a partial reflux at the second mesh. The aperture of at least some of the meshes of the second mesh is smaller than the aperture of the meshes of the first mesh, or the aperture of all the meshes of the second mesh is smaller than the aperture of the meshes of the first mesh. In this way, the mixing effect of the filter on the refrigerant is further improved.

[0093] The embodiment of the present disclosure also provides an air conditioning system, comprising the variable split heat exchanger as described above.

[0094] The effects of the air conditioning system provided by the embodiment of the present disclosure are the same as those described above for the variable split heat exchanger, and are not described in detail here.

[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 variable split flow heat exchanger, characterized in that: The heat exchange tube group includes a heat exchange tube group and an air pipe component connected to the heat exchange tube group. The heat exchange tube group includes a first heat exchange branch and a second heat exchange branch. The air pipe component includes: Gas collector; The air pipe conducting component is connected to the air collecting pipe, and the air pipe conducting component includes an air valve conducting inlet end and an air valve conducting outlet end; A first air pipe branch pipe is connected to a first heat exchange branch of the heat exchanger and is connected to a side of an air valve conduction inflow end of an air pipe conduction component provided on the air collecting pipe; and, The second air pipe branch is connected to the second heat exchange branch of the heat exchanger and is connected to the air valve conduction inflow end of the air pipe conduction component arranged on the air collecting pipe, and the second air pipe branch is arranged on the upper part of the first air pipe branch. The flow direction of the refrigerant in the second air pipe branch is a first direction, the flow direction of the refrigerant in the air collecting pipe is a second direction, and the first direction is non-parallel to the second direction.

2. The variable split flow heat exchanger according to claim 1, characterized in that: The second tracheal branch pipe includes a branch pipe end connected to the air collecting pipe, The angle between the end of the branch pipe and the gas collecting pipe is a, and 45°≤a≤90°.

3. The variable split heat exchanger according to claim 1, characterized in that: The first tracheal branch is a right-angle bent branch.

4. The variable split flow heat exchanger according to claim 1, characterized in that: The heat exchange tube group further includes a third heat exchange branch and a fourth heat exchange branch, and the air pipe component further includes a third air pipe branch and a fourth air pipe branch. Among them, the third air pipe branch is connected with the third heat exchange branch, and is connected to the side of the air valve conduction outflow end of the air pipe conduction component arranged in the air collecting pipe; the fourth air pipe branch is connected with the fourth heat exchange branch, and is connected to the side of the air valve conduction outflow end of the air pipe conduction component arranged in the air collecting pipe; and the third air pipe branch is arranged at the lower part of the fourth air pipe branch.

5. The variable split flow heat exchanger according to claim 4, characterized in that: The distance between the third tracheal branch and the fourth tracheal branch is less than or equal to the first preset distance M1.

6. The variable split heat exchanger according to claim 5, characterized in that: M1≤50mm.

7. The variable split flow heat exchanger according to claim 4, characterized in that: Also includes: A liquid pipe component, wherein the liquid pipe component comprises: Liquid collecting pipe; A liquid pipe conducting component is connected to the liquid collecting pipe, and the liquid pipe conducting component includes a liquid valve conducting inlet end and a liquid valve conducting outlet end; A first liquid pipe branch pipe is connected to a first heat exchange branch of the heat exchanger and is connected to a liquid valve conduction inflow end of a liquid pipe conduction component provided on the liquid collecting pipe; The second liquid pipe branch is connected to the second heat exchange branch of the heat exchanger and is connected to the liquid valve conduction outflow end of the liquid pipe conduction component arranged on the liquid collecting pipe; a third liquid pipe branch pipe connected to the third heat exchange branch of the heat exchanger and connected to the liquid valve conduction outflow end of the liquid pipe conduction component provided on the liquid collecting pipe; and, The fourth liquid pipe branch is connected to the fourth heat exchange branch of the heat exchanger and is connected to the liquid valve conduction outflow end of the liquid pipe conduction component arranged on the liquid collecting pipe. Wherein, the second liquid pipe branch is a bent branch.

8. The variable split heat exchanger according to claim 7, characterized in that: The liquid pipe component also includes: The main pipe section is connected to the liquid collecting pipe, and the third liquid pipe branch pipe and the fourth liquid pipe branch pipe are respectively connected to the main pipe section. The distance between the main pipe section and the second liquid pipe branch is less than or equal to the second preset distance M2.

9. The variable split heat exchanger according to claim 8, characterized in that: M2≤50mm.

10. The variable split heat exchanger according to claim 8, characterized in that: The main pipe section includes a first main pipe connecting end connected to the liquid collecting pipe, and a second main pipe connecting end connected to the third liquid pipe branch and the fourth liquid pipe branch, wherein: The distance between the first main pipe connecting end and the second main pipe connecting end is H1, 15mm≤H1≤70mm; and / or, The third liquid pipe branch includes a first connection end connected to the third heat exchange branch, and the shortest distance between the first connection end and the outer wall of the liquid collecting pipe is H2, 25mm≤H2≤90mm; and / or, The fourth liquid pipe branch includes a second connecting end connected to the fourth heat exchange branch, and the shortest distance between the second connecting end and the outer wall of the liquid collecting pipe is H3, 25mm≤H3≤90mm.

11. The variable split heat exchanger according to claim 8, characterized in that: The liquid pipe component also includes: The discrete element is arranged in the path where the refrigerant flows, and is used to disperse the refrigerant flowing into the collecting pipe.

12. The variable split heat exchanger according to claim 11, characterized in that: The liquid pipe component also includes: The liquid inlet pipe comprises a separation pipe section and an outflow pipe section which are connected to each other. The outflow pipe section is connected to the liquid collecting pipe. The discrete element is arranged in the outflow pipe section. The refrigerant passes through the separation pipe section and enters the outflow pipe section, and enters the collecting pipe through the discrete element.

13. The variable split heat exchanger according to claim 12, characterized in that: The distance between the bottom end of the discrete element and the bottom end of the separation pipe section is h1, h1 ≥ 50 mm; and / or, The distance between the first connection point between the separation pipe section and the outflow pipe section and the bottom end of the discrete element is h2, and h2≥5mm.

14. An air conditioning system, characterized in that: It comprises the variable split heat exchanger as claimed in any one of claims 1 to 13.

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