One-way flow divider and variable flow divider heat exchanger

Abstract

The variable flow-dividing heat exchanger includes a first one-way flow dividing device (200) and a second one-way flow dividing device (400). The first one-way flow dividing device (200) includes a main pipe (1), a branch pipe (2), and a first sliding cutoff means (4). When the first sliding cutoff means (4) slides to a first position (41), a refrigerant flows in through the second refrigerant pipe port (12) and flows out through the third refrigerant pipe port (21). When the first sliding cutoff means (4) slides to a second position (42), a refrigerant flows in through the first refrigerant pipe port (11) and flows out through the second refrigerant pipe port (22). The second one-way flow dividing device (400) includes a main pipe (1), a branch pipe (2) and a second sliding cutoff means (5), and when the second sliding cutoff means (5) slides to the third position (51), the refrigerant flows in through the first refrigerant pipe port (11) and flows out through the third refrigerant pipe port (21), while when the second sliding cutoff means (5) slides to the fourth position (52), the refrigerant flows in through the second refrigerant pipe port (12) and the third refrigerant pipe port (21) and flows out through the first refrigerant pipe port (11). The use of this variable shunt heat exchanger helps reduce material costs and space costs.

Description

Technical Field

[0001] This application is filed based on a Chinese patent application with an application number of 202210547991.X and an application date of May 20, 2022, claims the priority of the Chinese patent application, and all the contents of the Chinese patent application are incorporated into this application by reference.

[0002] This application relates to the technical field of air conditioners, for example, a unidirectional flow dividing device and a variable flow dividing heat exchanger.

Background Art

[0003] When an air conditioner performs cooling operation and heating operation, the optimal flow path of its outdoor heat exchanger is different.

[0004] When the air conditioner performs heating operation, the refrigerant in the heat exchange pipeline of the outdoor heat exchanger is in a low-temperature and low-pressure zone, and its heat transfer performance is mainly jointly regulated by the heat transfer coefficient and the pressure drop, and is suitable for a relatively large number of branch paths. While ensuring the heat transfer coefficient, it greatly reduces the pressure drop and raises the system pressure, thereby improving the low-temperature heating capacity of the air conditioner. When the air conditioner performs cooling operation, the refrigerant in the heat exchange pipeline of the outdoor heat exchanger is in a high-temperature and high-pressure zone, is not sensitive to the pressure drop, and its heat transfer performance is mainly affected by the heat transfer coefficient. It is suitable for a relatively small number of branch paths to accelerate the circulation and increase the heat transfer coefficient, thereby improving the high-temperature cooling capacity of the air conditioner. Currently, the outdoor heat exchanger of an air conditioner mainly uses a variable flow dividing heat exchanger to realize the switching control of the refrigerant flow path in the above heating operation and cooling operation.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the process of realizing the embodiments of the present disclosure, it has been found that there are at least the following problems in the related technologies.

[0006] In the above-mentioned variable flow divide heat exchangers, valves such as check valves and solenoid valves are often used to control the switching of the refrigerant flow path between heating and cooling operations. However, as the number of valves such as check valves and solenoid valves increases, the number of welding points in the variable flow divide heat exchanger also increases. In order to ensure a welding safety distance, it is necessary to maintain a welding safety distance of 30 mm or more between welding points, which increases the material cost and spatial cost of the variable flow divide heat exchanger. [Means for solving the problem]

[0007] A brief overview is provided below to provide a basic understanding of some aspects of the disclosed embodiments. This overview is not a general description, nor does it define key points / important components or indicate the scope of protection of these embodiments, but is used as a prelude to the subsequent detailed description.

[0008] In embodiments of this disclosure, a unidirectional flow divider and a variable flow divider are provided to solve the technical problem in conventional variable flow divider heat exchangers, which is that material costs and spatial costs increase due to an increase in the number of welding points of the valves.

[0009] An embodiment of the first aspect of the present application provides a one-way flow divider, the device comprising: a main pipe including a first refrigerant pipe port and a second refrigerant pipe port provided at both ends, the main pipe having a first liquid separation position adjacent to the first refrigerant pipe port and a second liquid separation position adjacent to the second refrigerant pipe port; a branch pipe having one end communicating with the first liquid separation position of the main pipe and the other end being a third refrigerant pipe port; a connecting branch pipe connecting the second liquid separation position of the main pipe and the branch pipe; and a first sliding shut-off means slidably provided at the first liquid separation position, wherein when the first sliding shut-off means slides to the first position, the first refrigerant pipe port is shut off, allowing refrigerant to flow in from the second refrigerant pipe port and out from the third refrigerant pipe port; and when the first sliding shut-off means slides to the second position, the first refrigerant pipe port is opened, allowing refrigerant to flow in from the first refrigerant pipe port and out from the second and third refrigerant pipe ports.

[0010] In some embodiments, the first sliding shutoff means includes: a first shutoff slider provided along the cross-section of the main pipe at a first liquid separation position and slidable between a first position and a second position of the first liquid separation position; a first contact slider fixedly connected to the first shutoff slider and in contact with the inner wall of the main pipe, wherein the first contact slider is slidable in conjunction with the first shutoff slider; a first positioning means provided on the inner wall of the main pipe, wherein when the first sliding shutoff means slides to the first position, the first shutoff slider comes into contact with the first positioning means; and a second positioning means provided on the inner wall of the main pipe, wherein when the first sliding shutoff means slides to the second position, the first contact slider comes into contact with the second positioning means.

[0011] In some embodiments, the first shut-off slider is hollow or partially hollow inside.

[0012] In some embodiments, the first shut-off slider includes a first bottom surface facing the interior of the main pipe, a second bottom surface facing the first refrigerant pipe opening, and a first side surface enclosed between the first bottom surface and the second bottom surface, wherein the first contact slider is provided along the edge of the first bottom surface, the circumference of the first bottom surface is a first length, and the extended length of the first contact slider on the first bottom surface is a second length, the second length being at least one-third of the first length and at least half of the first length.

[0013] In some embodiments, the distance between the first side surface of the first shut-off slider and the inner wall of the main tube at the first liquid separation position is 0.005 mm or more and 1 mm or less.

[0014] In some embodiments, the cross-section of the main tube at the first liquid separation position is polygonal, and the shape of the first shut-off slider is the same as the shape of the cross-section at the first liquid separation position.

[0015] In some embodiments, the first bottom surface of the first blocking slider includes a first and second bent-connected edge portion and the first contact slider includes a first and second bent-connected contact plate, the first contact plate being fixedly connected to the first edge portion and the second contact plate being fixedly connected to the second edge portion.

[0016] In some embodiments, the first sliding blocking means further includes a first boss provided on a first side surface of the first blocking slider, wherein the height of the first boss is less than or equal to the height of the first side surface, the first boss being provided on the side of the first sliding blocking means facing the first separatory position, and the first contact slider being provided on the side of the first sliding blocking means away from the first separatory position.

[0017] In some embodiments, the main pipe includes a first pipe segment between a first refrigerant pipe inlet and a first liquid separation position, the first pipe segment being inclined toward the first liquid separation position.

[0018] An embodiment of a second aspect of the present application provides a one-way flow diversion device, the device comprising: a main pipe including a first refrigerant pipe port and a second refrigerant pipe port provided at both ends, the main pipe having a first liquid separation position adjacent to the first refrigerant pipe port and a second liquid separation position adjacent to the second refrigerant pipe port; a branch pipe having one end communicating with the first liquid separation position of the main pipe and the other end being a third refrigerant pipe port; a connecting branch pipe connecting the second liquid separation position of the main pipe and the branch pipe; and a second sliding shutoff means slidably provided at the second liquid separation position, wherein when the second sliding shutoff means slides to the third position, the second refrigerant pipe port is shut off, allowing refrigerant to flow in from the first refrigerant pipe port and out from the third refrigerant pipe port, while when the second sliding shutoff means slides to the fourth position, the second refrigerant pipe port is opened, allowing refrigerant to flow in from the second and third refrigerant pipe ports and out from the first refrigerant pipe port.

[0019] In some embodiments, the second sliding shutoff means includes: a second shutoff slider provided along the cross-section of the main pipe at the second liquid separation position and slidable between a third position and a fourth position of the second liquid separation position; a second contact slider fixedly connected to the second shutoff slider and in contact with the inner wall of the main pipe, wherein the second contact slider is slidable in conjunction with the second shutoff slider; a third positioning means provided on the inner wall of the main pipe, wherein when the second sliding shutoff means slides to the third position, the second shutoff slider comes into contact with the third positioning means; and a fourth positioning means provided on the inner wall of the main pipe, wherein when the second sliding shutoff means slides to the fourth position, the second contact slider comes into contact with the fourth positioning means.

[0020] In some embodiments, the second shut-off slider is hollow or partially hollow inside.

[0021] In some embodiments, the second shut-off slider includes a third bottom surface facing the interior of the main pipe, a fourth bottom surface facing the second refrigerant pipe opening, and a second side surface enclosed between the third bottom surface and the fourth bottom surface, wherein the second contact slider is provided along the edge of the third bottom surface, the circumference of the third bottom surface is a third length, and the extended length of the second contact slider on the third bottom surface is a fourth length, the fourth length being at least one-third of the third length and at least half of the third length.

[0022] In some embodiments, the distance between the second side surface of the second shut-off slider and the inner wall of the main pipe at the second liquid separation position is 0.005 mm or more and 1 mm or less.

[0023] In some embodiments, the cross-section of the main tube at the second liquid separation position is polygonal, and the shape of the second shut-off slider is the same as the shape of the cross-section at the second liquid separation position.

[0024] In some embodiments, the third bottom surface of the second shut-off slider includes a third side portion and a fourth side portion that are bent and connected, the second abutting slider includes a third abutting plate and a fourth abutting plate that are bent and connected, the third abutting plate is fixedly connected to the third side portion, and the fourth abutting plate is fixedly connected to the fourth side portion.

[0025] In some embodiments, the second sliding shut-off means further includes a second boss provided on the second side surface of the second shut-off slider, where the height of the second boss is not greater than the height of the second side surface, the second boss is provided on the side facing the second liquid separation position of the second sliding shut-off means, and the second abutting slider is provided on the side away from the second liquid separation position of the second sliding shut-off means.

[0026] In some embodiments, the main pipe includes a second pipe segment between the second refrigerant pipe opening and the second liquid separation position, and the second pipe segment is provided inclined toward the second liquid separation position side.

[0027] In an embodiment of the third aspect of the present application, a variable flow heat exchanger is provided. The variable flow heat exchanger includes a heat exchange pipeline including a first heat exchange branch path, a second heat exchange branch path, and a third heat exchange branch path that are connected in parallel; a first one-way flow dividing device provided on a first side of the heat exchange pipeline, wherein a second refrigerant pipe port of the first one-way flow dividing device is connected to the first heat exchange branch path; a first liquid distributor provided on a second side of the heat exchange pipeline, wherein the first liquid distributor is connected to the second heat exchange branch path and the third heat exchange branch path; a second one-way flow dividing device provided on the second side of the heat exchange pipeline, wherein a third refrigerant pipe port of the second one-way flow dividing device is connected to the first heat exchange branch path; a first bypass pipeline connecting a second refrigerant pipe port of the second one-way flow dividing device and the first liquid distributor; a second liquid distributor provided on the first side of the heat exchange pipeline, wherein the second liquid distributor is connected to the third heat exchange branch path; and a second bypass pipeline connecting a first refrigerant pipe port of the first one-way flow dividing device and the second liquid distributor. The first one-way flow dividing device is any one-way flow dividing device according to the embodiment of the first aspect, and the second one-way flow dividing device is any one-way flow dividing device according to the embodiment of the second aspect.

[0028] The one-way flow dividing device and the variable flow heat exchanger provided by the embodiments of the present disclosure can achieve the following technical effects.

[0029] The variable flow heat exchanger provided by the embodiments of the present disclosure includes a heat exchange pipeline, a first liquid distributor, a second liquid distributor, a first bypass pipeline, a second bypass pipeline, a first one-way flow dividing device, and a second one-way flow dividing device. The first one-way flow dividing device and the second one-way flow dividing device both include a main pipe, a branch pipe, and a connecting branch pipe. A first refrigerant pipe port and a second refrigerant pipe port are installed at both ends of the main pipe. A first liquid separation position is provided near the first refrigerant pipe port of the main pipe, and a second liquid separation position is provided near the second refrigerant pipe port of the main pipe. One end of the branch pipe is connected to the first liquid separation position, and the other end is a third refrigerant pipe port. The connecting branch pipe connects the second liquid separation position and the branch pipe.

[0030] The first one-way flow divider further comprises a first sliding shutoff means slidably provided at a first liquid separator position. When the first sliding shutoff means slides to the first position, the first refrigerant pipe port is shut off, allowing refrigerant to flow in from the second refrigerant pipe port and out from the third refrigerant pipe port. When the first sliding shutoff means slides to the second position, the first refrigerant pipe port is opened, allowing refrigerant to flow in from the first refrigerant pipe port and out from the second and third refrigerant pipe ports. The first one-way flow divider does not require the provision of extra valves; the flow of refrigerant within the first one-way flow divider can be changed simply by shutting off or opening the first refrigerant pipe port with the first sliding shutoff means, which helps reduce material and space costs.

[0031] The second one-way flow divider further comprises a second sliding shutoff means slidably provided at the second liquid divider position. When the second sliding shutoff means slides to the third position, the second refrigerant pipe port is shut off, allowing refrigerant to flow in from the first refrigerant pipe port and out from the third refrigerant pipe port. When the second sliding shutoff means slides to the fourth position, the second refrigerant pipe port is opened, allowing refrigerant to flow in from both the second and third refrigerant pipe ports and out from the first refrigerant pipe port. The second one-way flow divider does not require an extra valve; the flow of refrigerant within the second one-way flow divider can be changed simply by shutting off or opening the second refrigerant pipe port with the second sliding shutoff means, contributing to a reduction in material and space costs.

[0032] The above general description and the following description are illustrative and explanatory only and are not intended to limit this application. [Brief explanation of the drawing]

[0033] One or more embodiments are illustrated by corresponding drawings, and these illustrative descriptions and drawings do not constitute limitations of embodiments, means having the same reference numeral in the drawings are shown as similar means, and the drawings do not constitute limitations of scale. [Figure 1] This is a schematic diagram showing the configuration of a variable flow divider heat exchanger provided by the embodiments of this disclosure in the air conditioner heating operation. [Figure 2]This is a schematic diagram showing an enlarged view of the structure of region A in Figure 1. [Figure 3] This diagram shows an enlarged view of the structure of region B in Figure 1. [Figure 4] This is a schematic diagram showing the local structure of the first sliding blocking means provided by the embodiments of this disclosure. [Figure 5] This is a schematic diagram showing a local structure of another first sliding interceptor provided by an embodiment of the present disclosure. [Figure 6] This is a schematic diagram showing the configuration of another variable flow shunt heat exchanger provided by the embodiments of this disclosure in the air conditioner heating operation. [Figure 7] This is a schematic diagram showing the configuration of a variable flow shunt heat exchanger provided by the embodiments of this disclosure in the context of air conditioner cooling operation. [Figure 8] This is a schematic diagram showing an enlarged view of the structure of region C in Figure 7. [Figure 9] This is a schematic diagram showing an enlarged view of the structure of region D in Figure 7. [Modes for carrying out the invention]

[0034] To gain a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure is described in detail below, in conjunction with the accompanying drawings. The accompanying drawings are for reference purposes only and are not intended to limit the embodiments of this disclosure. The following technical description uses several details to facilitate explanation and to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and apparatus may be shown in a simplified manner to simplify the drawings.

[0035] In the description and claims of the embodiments of this disclosure and in the drawings described above, terms such as “First,” “Second,” etc., are used to distinguish similar objects, not to describe a specific order or priority. It should be understood that the data used in this manner is interchangeable where appropriate to illustrate the embodiments described in this disclosure. Furthermore, the terms “includes” and “have,” and their variations, are intended to cover non-exclusive inclusion.

[0036] In the embodiments of this disclosure, the orientations or positional relationships indicated by terms such as “up,” “down,” “inside,” “middle,” “outside,” “front,” and “back” are based on the orientations or positional relationships shown in the drawings and are solely for the purpose of illustrating the embodiments and examples of this disclosure. They are not intended to limit the shown devices, means, or components to having a particular orientation or to being configured and operated in a particular orientation. Furthermore, some of the above terms may be used to indicate other meanings in addition to orientation or positional relationships. For example, the term “up” may also be used in some cases to indicate a particular dependency or connection. To those skilled in the art, the specific meanings of these terms in the embodiments of this disclosure may be understood in accordance with the specific context.

[0037] Furthermore, the terms “to provide,” “to connect,” and “to fix” are to be understood in a broad sense. For example, “connection” may be a fixed connection, a removable connection, or an integrated structure; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection via an intermediate medium; and it may be internal communication between two devices, means, or components. To those skilled in the art, the specific meaning of the above terms in the embodiments of this disclosure may be understood depending on the specific circumstances.

[0038] Unless otherwise specified, the term "plural" means two or more.

[0039] Furthermore, the embodiments and features in the embodiments of this disclosure may be combined with each other without conflict.

[0040] A first embodiment of the present disclosure provides a one-way flow diversion device comprising a main pipe 1, a branch pipe 2, a connecting branch pipe 3, and a first sliding shutoff means 4, as shown in Figures 1, 3, and 9. The main pipe 1 includes a first refrigerant pipe port 11 and a second refrigerant pipe port 12, which are provided at both ends of the main pipe 1, and the main pipe 1 is provided with a first liquid separation position 13 adjacent to the first refrigerant pipe port 11 and a second liquid separation position 14 adjacent to the second refrigerant pipe port 12. One end of the branch pipe 2 is connected to the first liquid separation position 13 of the main pipe 1, and the other end is a third refrigerant pipe port 21. The connecting branch pipe 3 connects the second liquid separation position 14 of the main pipe 1 to the branch pipe 2. The first sliding shut-off means 4 is slidably provided at the first liquid separation position 13. When the first sliding shut-off means 4 slides to the first position 41, the first refrigerant pipe port 11 is shut off, allowing refrigerant to flow in from the second refrigerant pipe port 12 and out from the third refrigerant pipe port 21. Conversely, when the first sliding shut-off means 4 slides to the second position 42, the first refrigerant pipe port 11 is opened, allowing refrigerant to flow in from the first refrigerant pipe port 11 and out from the second refrigerant pipe port 12 and the third refrigerant pipe port 21.

[0041] According to the one-way flow divider provided by the embodiments of this disclosure, the one-way flow divider comprises a main pipe 1, branch pipes 2, connecting branch pipes 3, and a first sliding shutoff means 4. When the first sliding shutoff means 4 slides to a first position 41, the first refrigerant pipe port 11 is shut off, allowing refrigerant to flow in through the second refrigerant pipe port 12 and out through the third refrigerant pipe port 21. When the first sliding shutoff means 4 slides to a second position 42, the first refrigerant pipe port 11 is opened, allowing refrigerant to flow in through the first refrigerant pipe port 11 and out through the second and third refrigerant pipe ports 12 and 21. The one-way flow divider does not require the provision of extra valves, and by shutting off or opening the first refrigerant pipe port 11 with the first sliding shutoff means 4, the flow of refrigerant within the one-way flow divider is altered, which helps reduce material and space costs.

[0042] In the embodiment of this disclosure, the branch pipe 2 communicates with the first liquid separation position 13 of the main pipe 1, and the connecting branch pipe 3 communicates with the branch pipe 2 and the second liquid separation position 14 of the main pipe 1, thereby creating a circular configuration inside the one-way flow divider. As can be seen from the above-described configuration of the branch pipe 2, main pipe 1 and connecting branch pipe 3, the internal configuration of this one-way flow divider is not limited to a circular configuration and can be installed as needed.

[0043] The operating principle of a one-way flow divider is as follows: As shown in Figures 1 and 3, the straight arrows in the figures indicate the flow of refrigerant. When the air conditioner is in heating operation, the refrigerant in the air conditioner piping flows through the one-way flow divider and first flows into the first refrigerant pipe port 11. Because the refrigerant in the air conditioner piping has a constant flow velocity, when the refrigerant flows into the first refrigerant pipe port 11, the first sliding shutoff means 4 is pushed by the flow of refrigerant and slides from the first position 41 to the second position 42. When the first sliding shutoff means 4 slides to the second position 42, the first refrigerant pipe port 11 and the branch pipe 2 become connected, and the connecting branch pipe 3 connects the second liquid separation position 14 of the main pipe 1 and the branch pipe 2, so that the refrigerant flows out from the second refrigerant pipe port 12 of the main pipe 1 and the third refrigerant pipe port 21 at the other end of the branch pipe 2.

[0044] As shown in Figures 7 and 9, when the air conditioner is in cooling operation, the refrigerant in the air conditioner piping flows through the one-way flow divider and first flows into the second refrigerant piping 12. Since the refrigerant in the air conditioner piping has a constant flow velocity, when the refrigerant flows into the second refrigerant piping 12, the first sliding shutoff means 4 is pushed by the flow of the refrigerant and slides from the second position 42 to the first position 41. When the first sliding shutoff means 4 slides to the first position 41, the first refrigerant piping opening 11 is shut off, the first liquid separation position 13 of the main pipe 1 is connected to the branch pipe 2, and the second liquid separation position 14 of the main pipe 1 is connected to the branch pipe 2 by the connecting branch pipe 3, so the refrigerant flows out from the third refrigerant pipe opening 21 of the branch pipe 2.

[0045] In some optional embodiments, as shown in Figure 3, the first sliding shutoff means 4 includes a first shutoff slider 43, a first contact slider 44, a first positioning means 45, and a second positioning means 46. The first shutoff slider 43 is provided along the cross-section of the main pipe 1 at the first separatory position 13 and is slidable between a first position 41 and a second position 42 of the first separatory position 13. The first contact slider 44 is fixedly connected to the first shutoff slider 43 and contacts the inner wall of the main pipe 1, and the first contact slider 44 is slidable with the first shutoff slider 43. The first positioning means 45 is provided on the inner wall of the main pipe 1, and when the first sliding shutoff means 4 slides to the first position 41, the first shutoff slider 43 contacts the first positioning means 45. The second positioning means 46 is provided on the inner wall of the main pipe 1, and when the first sliding blocking means 4 slides to the second position 42, the first contact slider 44 comes into contact with the second positioning means 46.

[0046] According to this selectable embodiment, by providing a first positioning means 45 and a second positioning means 46 on the inner wall of the main pipe 1, when the first sliding shut-off means 4 slides to the first position 41, the first shut-off slider 43 contacts the first positioning means 45, while when the first sliding shut-off means 4 slides to the second position 42, the first contact slider 44 contacts the second positioning means 46. In other words, the first positioning element 45 and the second positioning element 46 restrict the reciprocating sliding of the first shut-off slider 43 and the first contact slider 44 between the first position 41 and the second position 42, thereby achieving electrical and electrical continuity between the first refrigerant pipe opening 11 and the branch pipe 2. The structure is simple and the design is rational, making it useful for processing and manufacturing.

[0047] In some selectable embodiments, the first shut-off slider 43 is hollow or partially hollow inside.

[0048] According to this selectable embodiment, by making the inside of the first shut-off slider 43 hollow or partially hollow, the weight of the first shut-off slider 43 is reduced, which helps to reduce the resistance that the refrigerant exerts on sliding the first shut-off slider 43 between the first position 41 and the second position 42.

[0049] Selectively, the material of the first shut-off slider 43 may be a composite of one or more materials selected from nylon, plastic, ceramics, or metal. If the material of the first shut-off slider 43 is a metal, it may be aluminum, copper, steel, etc.

[0050] The weight of the first shut-off slider 43 may be that of a solid material, provided that it does not hinder the pressing force of the refrigerant, and it can be understood that this can reduce deformation.

[0051] In some selectable embodiments, as shown in Figures 4, 5, and 9, the first shut-off slider 43 includes a first bottom surface 431, a second bottom surface 432, and a first side surface 433. The first bottom surface 431 faces the interior of the main pipe 1, the second bottom surface 432 faces the first refrigerant pipe opening 11, the first side surface 433 is enclosed between the first bottom surface 431 and the second bottom surface 432, and the first contact slider 44 is provided along the edge of the first bottom surface 431, the circumference of the first bottom surface 431 is the first length, and the extended length of the first contact slider 44 on the first bottom surface 431 is the second length, the second length being at least 1 / 3 of the first length and at least 1 / 2 of the first length.

[0052] According to this selectable embodiment, by setting the relationship between the first length and the second length such that the second length is at least 1 / 3 of the first length and at least 1 / 2 of the first length, the contact area between the first contact slider 44 and the inner wall of the main pipe 1 can be kept within an appropriate range, which helps to improve the stability of the first sliding blocking means 4.

[0053] If selectively the first contact slider 44 is perpendicular to the first base surface 431, the extended length of the first contact slider 44 on the first base surface 431, i.e., the second length, can be understood as the perimeter of the projection of the first contact slider 44 on the first base surface 431.

[0054] In some selectable embodiments, the distance between the first side surface 433 of the first shut-off slider 43 and the inner wall of the main tube 1 at the first liquid separation position 13 is 0.005 mm or more and 1 mm or less.

[0055] According to this selectable embodiment, the distance between the first side surface 433 of the first shut-off slider 43 and the inner wall of the main pipe 1 at the first separatory position 13 is 0.005 mm or more and 1 mm or less. This provides a small fitting gap between the first shut-off slider 43 and the inner wall of the main pipe 1 at the first separatory position 13, which improves the stability of the first shut-off slider 43 during its sliding process without affecting its sliding motion.

[0056] Preferably, the distance between the first side surface 433 of the first shut-off slider 43 and the inner wall of the main pipe 1 at the first liquid separation position 13 is 0.01 mm or more and 0.02 mm or less.

[0057] In some selectable embodiments, as shown in Figure 5, the cross-section of the main pipe 1 at the first separation position 13 is polygonal, and the shape of the first shut-off slider 43 is the same as the shape of the cross-section at the first separation position 13.

[0058] According to this selectable embodiment, the shape of the first shut-off slider 43 is the same as the shape of the cross-section of the main tube 1 at the first separatory position 13, and both are polygonal. In this way, the first shut-off slider 43 can be engaged with the main tube 1, making it difficult for the first shut-off slider 43 to rotate when it reciprocates and slides at the first separatory position 13 of the main tube 1, which helps to improve the stability of the first shut-off slider 43 during sliding.

[0059] As shown in Figure 4, the shape of the first shut-off slider 43 and the shape of the cross-section of the main pipe 1 at the first liquid separation position 13 may both be circular, and of course, they can be set to other shapes as needed.

[0060] In some selectable embodiments, as shown in Figure 5, the first bottom surface 431 of the first shut-off slider 43 includes a first side portion 4311 and a second side portion 4312 that are bent and connected, and the first contact slider 44 includes a first contact plate 441 and a second contact plate 442 that are bent and connected, the first contact plate 441 being fixedly connected to the first side portion 4311 and the second contact plate 442 being fixedly connected to the second side portion 4312.

[0061] According to this selectable embodiment, the first bottom surface 431 of the first shut-off slider 43 includes a bent and connected first side portion 4311 and a second side portion 4312, and the first contact slider 44 includes a bent and connected first contact plate 441 and a second contact plate 442, the first contact plate 441 being fixedly connected to the first side portion 4311 and the second contact plate 442 being fixedly connected to the second side portion 4312, thereby forming a contact angle between the first contact slider 44 and the inner wall surface at the first liquid separation position 13 of the main pipe 1, which on the one hand can increase the contact area between the first contact slider 44 and the inner wall surface, thereby increasing the structural stability of the first contact slider 44, and on the other hand can prevent the first shut-off slider 43 from rotating when sliding.

[0062] In some optional embodiments, as shown in Figures 3, 4, and 5, the first sliding blocking means 4 further includes a first boss 47 provided on a first side surface 433 of the first blocking slider 43, the height of the first boss 47 being less than or equal to the height of the first side surface 433, the first boss 47 being provided on the side of the first sliding blocking means 4 facing the first separatory position 13, and the first contact slider 44 being provided on the side of the first sliding blocking means 4 away from the first separatory position 13.

[0063] According to this selectable embodiment, the first boss 47 is provided on the first side surface 433 of the first shut-off slider 43, with a height less than or equal to the height of the first side surface 433, and is provided on the side facing the first liquid separator position 13 of the first sliding shut-off means 4, thereby reducing the possibility of displacement after the first sliding shut-off means 4 slides to the first position 41 or the second position 42, and providing support to the first shut-off slider 43, thereby reducing the possibility of deformation due to refrigerant impact.

[0064] It can be understood that the shapes of the upper and lower surfaces of the first boss 47 are compatible with the shape of the branch pipe 2 that is located at and communicates with the first liquid separation position 13 of the main pipe 1.

[0065] In some selectable embodiments, the main pipe 1 includes a first pipe segment 15 between a first refrigerant pipe inlet 11 and a first liquid separation position 13, the first pipe segment 15 being inclined toward the first liquid separation position 13. As shown in Figure 6, the first pipe segment 15 is inclined from the lower left to the upper right.

[0066] According to this selectable embodiment, the first pipe segment 15 is provided inclined toward the first liquid separator position 13, so that when refrigerant is passed through the first refrigerant pipe opening 11, the refrigerant forms upward and rightward impact forces against the first shut-off slider 43, which helps to ensure the normal operation of the first sliding shut-off means 4 by causing the first shut-off slider 43 and the first contact slider 44 to slide from the first position 41 to the second position 42, in close contact with the inner wall of the main pipe 1.

[0067] A second embodiment of the present disclosure provides a one-way flow diversion device comprising a main pipe 1, a branch pipe 2, a connecting branch pipe 3, and a second sliding shutoff means 5, as shown in Figures 1, 2, and 8. The main pipe 1 includes a first refrigerant pipe port 11 and a second refrigerant pipe port 12, which are provided at both ends of the main pipe 1, and the main pipe 1 is provided with a first liquid separation position 13 adjacent to the first refrigerant pipe port 11 and a second liquid separation position 14 adjacent to the second refrigerant pipe port 12. One end of the branch pipe 2 is connected to the first liquid separation position 13 of the main pipe 1, and the other end is a third refrigerant pipe port 21. The connecting branch pipe 3 connects the second liquid separation position 14 of the main pipe 1 to the branch pipe 2. The second sliding shutoff means 5 is slidably provided at the second liquid separation position 14. When the second sliding shutoff means 5 slides to the third position 51, the second refrigerant pipe port 12 is shut off, allowing refrigerant to flow in from the first refrigerant pipe port 11 and out from the third refrigerant pipe port 21. On the other hand, when the second sliding shutoff means 5 slides to the fourth position 52, the second refrigerant pipe port 12 is opened, allowing refrigerant to flow in from both the second refrigerant pipe port 12 and the third refrigerant pipe port 21 and out from the first refrigerant pipe port 11.

[0068] According to the one-way flow divider provided by the embodiments of this disclosure, the one-way flow divider comprises a main pipe 1, a branch pipe 2, a connecting branch pipe 3, and a second sliding shutoff means 5. When the second sliding shutoff means 5 slides to a third position 51, the second refrigerant pipe port 12 is shut off, allowing refrigerant to flow in from the first refrigerant pipe port 11 and out from the third refrigerant pipe port 21. When the second sliding shutoff means 5 slides to a fourth position 52, the second refrigerant pipe port 12 is opened, allowing refrigerant to flow in from both the second and third refrigerant pipe ports 12 and out from the first refrigerant pipe port 11. The one-way flow divider does not require the provision of extra valves, and by shutting off or opening the second refrigerant pipe port 12 with the second sliding shutoff means 5, the flow of refrigerant within the one-way flow divider is altered, which helps reduce material and space costs.

[0069] In the embodiment of this disclosure, the branch pipe 2 is connected to the first liquid separation position 13 of the main pipe 1, and the connecting branch pipe 3 is connected to the branch pipe 2 and the second liquid separation position 14 of the main pipe 1, thereby creating a circular configuration inside the one-way flow divider. As can be seen from the above-described configuration of the branch pipe 2, main pipe 1 and connecting branch pipe 3, the internal configuration of this one-way flow divider is not limited to a circular configuration and can be installed as needed.

[0070] The operating principle of a one-way flow divider is as follows: As shown in Figures 1 and 2, the straight arrows in the figures indicate the flow of refrigerant. When the air conditioner is in heating operation, the refrigerant in the air conditioner piping flows through the one-way flow divider and first flows into the second refrigerant pipe port 12 and the third refrigerant pipe 21. Because the refrigerant in the air conditioner piping has a constant flow velocity, when the refrigerant flows into the second refrigerant pipe port 12, the second sliding shutoff means 5 is pushed by the flow of refrigerant and slides from the third position 51 to the fourth position 52. When the second sliding shutoff means 5 slides to the fourth position 52, the second refrigerant pipe port 12 and the connecting branch pipe 3 become connected, and since the branch pipe 2 is in communication with the first liquid separation position 13 of the main pipe 1, the refrigerant flows in from the second refrigerant pipe port 12 and the third refrigerant pipe port 21 and flows out from the first refrigerant pipe port 11.

[0071] As shown in Figures 7 and 8, when the air conditioner is in cooling operation, the refrigerant in the air conditioner piping flows through the one-way flow divider and first flows into the first refrigerant piping 11. Since the refrigerant in the air conditioner piping has a constant flow velocity, when the refrigerant flows into the first refrigerant piping 11, the second sliding shutoff means 5 is pushed by the flow of the refrigerant and slides from the fourth position 52 to the third position 51. When the second sliding shutoff means 5 slides to the third position 51, the second refrigerant piping opening 12 is shut off, and the connecting branch pipe 3 connects the second liquid separation position 14 of the main pipe 1 to the branch pipe 2, causing the refrigerant to flow out from the third refrigerant pipe opening 21 of the branch pipe 2.

[0072] In some optional embodiments, as shown in Figure 2, the second sliding shutoff means 5 includes a second shutoff slider 53, a second contact slider 54, a third positioning means 55, and a fourth positioning means 56. The second shutoff slider 53 is provided along the cross-section of the main pipe 1 at the second separation position 14 and is slidable between the third position 51 and the fourth position 52 of the second separation position 14. The second contact slider 54 is fixedly connected to the second shutoff slider 53 and contacts the inner wall of the main pipe 1, and the second contact slider 54 is slidable with the second shutoff slider 53. The third positioning means 55 is provided on the inner wall of the main pipe 1, and when the second sliding shutoff means 5 slides to the third position 51, the second shutoff slider 53 contacts the third positioning means 55. The fourth positioning means 56 is provided on the inner wall of the main pipe 1, and when the second sliding blocking means 5 slides to the fourth position 52, the second contact slider 54 comes into contact with the fourth positioning means 56.

[0073] According to this selectable embodiment, by providing a third positioning means 55 and a fourth positioning means 56 on the inner wall of the main pipe 1, when the second sliding shut-off means 5 slides to the third position 51, the third shut-off slider 53 contacts the third positioning means 55, while when the second sliding shut-off means 5 slides to the fourth position 52, the second contact slider 54 contacts the fourth positioning means 56. In other words, the third positioning element 55 and the fourth positioning element 56 restrict the reciprocating sliding of the second shut-off slider 53 and the second contact slider 54 between the third position 51 and the fourth position 52, thereby achieving continuity and shut-off between the second refrigerant pipe port 12 and the connecting branch pipe 3. The structure is simple and the design is rational, making it useful for processing and manufacturing.

[0074] In some selectable embodiments, the second shut-off slider 53 is internally hollow or partially hollow.

[0075] According to this selectable embodiment, by making the inside of the second shut-off slider 53 hollow or partially hollow, the weight of the second shut-off slider 53 is reduced, which helps to reduce the resistance that the refrigerant exerts on sliding the second shut-off slider 53 between the third position 51 and the fourth position 52.

[0076] Alternatively, the material of the second shut-off slider 53 may be a composite of one or more of the following materials: nylon, plastic, ceramics, or metal. If the material of the second shut-off slider 53 is a metal, it may be aluminum, copper, steel, etc.

[0077] The weight of the second shut-off slider 53 may be that of a solid material, provided that it does not interfere with the pressing force of the refrigerant, and it can be understood that this can reduce deformation.

[0078] In some selectable embodiments, the second shut-off slider 53 includes a third bottom surface, a fourth bottom surface, and a second side surface. The third bottom surface faces the interior of the main pipe 1, the fourth bottom surface faces the second refrigerant pipe opening 12, the second side surface is enclosed between the third bottom surface and the fourth bottom surface, the second contact slider 54 is provided along the edge of the third bottom surface, the circumference of the third bottom surface is the third length, and the extended length of the second contact slider 54 on the third bottom surface is the fourth length, the fourth length being at least one-third of the third length and at least one-half of the third length.

[0079] According to this selectable embodiment, by setting the relationship between the third length and the fourth length such that the fourth length is at least 1 / 3 of the third length and at least 1 / 2 of the third length, the contact area between the second contact slider 54 and the inner wall of the main pipe 1 can be kept within an appropriate range, which helps to improve the stability of the second sliding blocking means 5.

[0080] Selectively, when the second contact slider 54 is perpendicular to the third base surface, the extended length of the second contact slider 54 on the third base surface, i.e., the fourth length, can be understood as the perimeter of the projection of the second contact slider 54 on the third base surface.

[0081] In some selectable embodiments, the distance between the second side of the second shutoff slider 53 and the inner wall of the main tube 1 at the second liquid separation position 14 is 0.005 mm or more and 1 mm or less.

[0082] According to this selectable embodiment, the distance between the second side surface of the second shut-off slider 53 and the inner wall of the main pipe 1 at the second liquid separation position 14 is 0.005 mm or more and 1 mm or less. This satisfies the requirement that there be a small fitting gap between the second shut-off slider 53 and the inner wall of the main pipe 1 at the second liquid separation position 14 without affecting the sliding of the second shut-off slider 53.

[0083] Preferably, the distance between the second side surface of the second shut-off slider 53 and the inner wall of the main tube 1 at the second liquid separation position 14 is 0.01 mm or more and 0.02 mm or less.

[0084] In some embodiments, the cross-section of the main pipe 1 at the second liquid separation position 14 is polygonal, and the shape of the second shut-off slider 53 is the same as the shape of the cross-section at the second liquid separation position 14.

[0085] According to this selectable embodiment, the shape of the second shut-off slider 53 is the same as the shape of the cross-section of the main pipe 1 at the second liquid separation position 14, and both are polygonal. In this way, the second shut-off slider 53 can be engaged with the main pipe 1, making it less likely to rotate when the second shut-off slider 53 reciprocates and slides at the second liquid separation position 14 of the main pipe 1, which helps to improve the stability of the second shut-off slider 53 during sliding.

[0086] The shape of the second shut-off slider 53 and the shape of the cross-section of the main tube 1 at the second liquid separation position 14 may both be circular, and of course, they can be set to other shapes as needed.

[0087] In some selectable embodiments, the third bottom surface of the second blocking slider 53 includes a bent and connected third and fourth side portion, and the second contact slider 54 includes a bent and connected third contact plate and a fourth contact plate, the third contact plate being fixedly connected to the third side portion, and the fourth contact plate being fixedly connected to the fourth side portion.

[0088] According to this selectable embodiment, the third bottom surface of the second shut-off slider 53 includes a bent and connected third and fourth side portion, and the second contact slider 54 includes a bent and connected third and fourth contact plate, the third contact plate being fixedly connected to the third side portion, and the fourth contact plate being fixedly connected to the fourth side portion, thereby forming a contact angle between the second contact slider 54 and the inner wall surface at the second liquid separation position 14 of the main pipe 1, which on the one hand can increase the contact area between the second contact slider 54 and the inner wall surface, thereby increasing the structural stability of the second contact slider 54, and on the other hand can prevent the second shut-off slider 53 from rotating when sliding.

[0089] In some optional embodiments, as shown in Figures 1 and 2, the second sliding blocking means 5 further includes a second boss 57 provided on the second side surface of the second blocking slider 53, the height of the second boss 57 being less than or equal to the height of the second side surface, the second boss 57 being provided on the side of the second sliding blocking means 5 facing the second separatory position 14, and the second contact slider 54 being provided on the side of the second sliding blocking means 5 away from the second separatory position 14.

[0090] According to this selectable embodiment, the second boss 57 is provided on the second side surface of the second shut-off slider 53, its height being less than or equal to the height of the second side surface, and is provided on the side facing the second separatory position 14 of the second sliding shut-off means 5, thereby reducing the possibility of displacement after the second sliding shut-off means 5 slides to the third position 51 or the fourth position 52, and providing support to the second shut-off slider 53, thereby reducing the possibility of deformation of the second shut-off slider 53 due to refrigerant impact.

[0091] It can be understood that the shapes of the upper and lower surfaces of the first boss 57 are compatible with the shape of the connecting branch pipe 3 located at the second liquid separation position 14 of the main pipe 1 and communicating with it.

[0092] In some optional embodiments, as shown in Figures 1, 2, and 6, the main pipe 1 includes a second pipe segment 16 between the second refrigerant pipe inlet 12 and the second liquid separation position 14, the second pipe segment 16 being inclined toward the second liquid separation position 14.

[0093] According to this selectable embodiment, the second pipe segment 16 is provided inclined toward the second liquid separation position 14, so that when refrigerant is passed through the second refrigerant pipe opening 12, the refrigerant forms upward and leftward impact forces against the second shut-off slider 53, which helps to ensure the normal operation of the second sliding shut-off means 5 by causing the second shut-off slider 53 and the second contact slider 54 to slide from the third position 51 to the fourth position 52, in close contact with the inner wall of the main pipe 1.

[0094] A third embodiment of the embodiments of the present disclosure provides a variable flow divide heat exchanger, as shown in Figures 1 and 7, which includes a heat exchange pipeline 100, a first one-way flow divider 200, a first liquid separator 300, a second one-way flow divider 400, a first bypass pipeline 500, a second liquid separator 600, and a second bypass pipeline 700.

[0095] The heat exchange pipeline 100 includes a first heat exchange branch 101, a second heat exchange branch 102, and a third heat exchange branch 103, all connected in parallel. The first one-way flow divider 200 is located on the first side of the heat exchange pipeline 100, and the second refrigerant pipe port 12 of the first one-way flow divider 200 is connected to the first heat exchange branch 101. The first liquid separator 300 is located on the second side of the heat exchange pipeline 100, and the first liquid separator 300 is connected to the second heat exchange branch 102 and the third heat exchange branch 103. The second one-way flow divider 400 is located on the second side of the heat exchange pipeline 100, and the third refrigerant pipe 21 of the second one-way flow divider 400 is connected to the first heat exchange branch 101. The first bypass pipeline 500 connects the second refrigerant pipeline 12 of the second one-way flow divider 400 to the first liquid separator 300. The second liquid separator 600 is located on the first side of the heat exchange pipeline 100 and is connected to the third heat exchange branch line 103. The second bypass pipeline 700 connects the first refrigerant pipe port 11 of the first one-way flow divider to the second liquid separator 600.

[0096] Here, as shown in Figures 3 and 9, the first one-way flow divider 200 is a one-way flow divider in the embodiment of the first aspect, and as shown in Figures 2 and 8, the second one-way flow divider 400 is a one-way flow divider in the embodiment of the second aspect.

[0097] Since the variable flow divide heat exchangers provided by embodiments of this disclosure include one unidirectional flow divider according to embodiments of the first embodiment and one unidirectional flow divider according to embodiments of the second embodiment, they have all the beneficial effects of the one unidirectional flow divider according to embodiments of the first embodiment and all the beneficial effects of the one unidirectional flow divider according to embodiments of the second embodiment described above, and will not be repeated here.

[0098] As shown in Figures 1 and 7, the air conditioner comprises a compressor 800, an indoor heat exchanger 900, a throttle device 1000, and a variable flow divider heat exchanger, as well as a refrigerant circulation circuit in which they are arranged.

[0099] Here, when the air conditioner is operating in heating mode, the flow of the refrigerant is shown by the straight arrows in Figure 1. Specifically, the high-temperature, high-pressure refrigerant from the compressor 800 flows into the indoor heat exchanger 900, the indoor heat exchanger 900 heats the indoor environment through the action of a fan, the cooled refrigerant flows into the throttle device 1000, and after going through the throttling pressure reduction process of the throttle device 1000, the refrigerant flows into the variable flow divider heat exchanger. Specifically, the refrigerant first flows into the second liquid separator 600 of the variable flow divider heat exchanger, and then a portion of the refrigerant flows from the second liquid separator 600 into the third heat exchange branch 103. The remaining portion of the refrigerant flows into the first refrigerant line 11 of the first one-way flow divider 200 via the second bypass line 700, and then flows into the first heat exchange branch 101 and the second heat exchange branch 102 from the second refrigerant line 12 and the third refrigerant line 21 of the first one-way flow divider 200, respectively. The refrigerant in the second heat exchange branch 102 and the third heat exchange branch 103 then flow into the first liquid separator 300. The refrigerant that has flowed into the first liquid separator 300 flows into the second refrigerant line 12 of the second one-way flow divider 400 via the first bypass line 500, and the refrigerant that has flowed out of the first heat exchange branch 101 flows into the third refrigerant pipe port 21 of the second one-way flow divider 400. As a result, all the refrigerant flows out of the first refrigerant pipe port 11 of the second one-way flow divider 400 and returns to the compressor 800 to perform the next cycle. In the process described above, the first heat exchange branch 101, the second heat exchange branch 102, and the third heat exchange branch 103 are connected in parallel. That is, the refrigerant completes heat exchange in the variable flow divider body via the three branch paths, ensuring a heat transfer coefficient and significantly reducing the pressure drop, thereby increasing the low-temperature heating capacity.

[0100] When the air conditioner is operating in cooling mode, the flow of the refrigerant is as shown by the straight arrows in Figure 7. Specifically, the high-temperature, high-pressure refrigerant from the compressor 800 flows into the variable flow divider, and more specifically, the refrigerant first flows into the first refrigerant pipe port 11 of the second one-way flow divider 400 of the variable flow divider, and then flows out from the third refrigerant pipe port 21 of the second one-way flow divider 400. The outflowing refrigerant then flows through the first heat branching path 101 into the second refrigerant pipe port 12 of the first one-way flow divider 200, and the first one-way flow divider 200 The refrigerant flows out from the third refrigerant pipe port 21, and the flowing refrigerant sequentially flows into the second heat branch 102, the first liquid separator 300, and the third heat branch 103. From the third heat exchange branch 103, it flows into the second liquid separator 600. After the refrigerant flows out from the second liquid separator 600, it enters the throttle device 1000, is throttled, and its pressure is reduced before it flows into the indoor heat exchanger 900, which cools the indoor air. After the refrigerant absorbs heat from the indoor environment, it returns to the compressor 800 to perform the next cycle. In the process described above, the first heat exchange branch 101, the second heat exchange branch 102, and the third heat exchange branch 103 connect the second unidirectional flow divider 400, the first unidirectional flow divider 200, the first liquid separator 300, and the second liquid separator 600 in series. In other words, the refrigerant completes heat exchange in the variable flow divider heat exchanger body via a single path, thereby accelerating the circulation of the refrigerant and increasing the high-temperature cooling capacity.

[0101] The above description and accompanying drawings adequately illustrate embodiments of the present disclosure so that those skilled in the art can implement them. Other embodiments may include structural and other modifications. Embodiments represent only possible modifications. Individual parts and functions are optional unless expressly required, and the order of operations is changeable. Parts and features of some embodiments may be included in or replaced by parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the present disclosure is limited only by the appended claims. [Explanation of Symbols]

[0102] 1 main manager 2 branch pipes 3 Connecting branch pipe 4. First sliding blocking means 5. Second sliding blocking means 100 Heat exchange line 200 1st one-way flow divider 300 1st separator 400 2nd one-way flow divider 500 First Bypass Pipeline 600 2nd separator 700 Second Bypass Pipeline 800 Compressor 900 Indoor heat exchanger 1000 Throttle device 101 First Heat Exchange Branch 102 Second Heat Exchange Branch 103 Third Heat Exchange Branch 11 1st refrigerant pipe port 12 2nd refrigerant pipe port 13 1st separation position 14 2nd separation position 15. First Pipe Segment 16. Second Pipe Segment 21 3rd refrigerant pipe port 41 1st position 42 2nd position 43. First cutoff slider 431 1st bottom 4311 First side 4312 Second side 432 2nd bottom surface 433 1st aspect 44. First contact slider 441 First contact plate 442 Second contact plate 45 First positioning means 46 Second positioning means 47 First Boss 51 3rd position 52 4th position 53 Second cutoff slider 54. Second contact slider 55 Third positioning means 56 Fourth positioning means 57 Second Boss

Claims

[Claim 1] A heat exchange pipeline (100) including a first heat exchange branch (101), a second heat exchange branch (102), and a third heat exchange branch (103) connected in parallel, A first one-way flow divider (200) is provided on the first side of the heat exchange pipeline (100), wherein the second refrigerant pipe port (12) of the first one-way flow divider (200) is connected to the first heat exchange branch line (101), A first liquid separator (300) is provided on the second side of the heat exchange pipeline (100), and the first liquid separator (300) is connected to the second heat exchange branch line (102) and the third heat exchange branch line (103), A second one-way flow divider (400) is provided on the second side of the heat exchange pipeline (100), wherein the third refrigerant pipe port (21) of the second one-way flow divider (400) is connected to the first heat exchange branch line (101), A first bypass pipeline (500) connects the second refrigerant pipe port (12) of the second one-way flow divider (400) to the first liquid separator (300), A second liquid separator (600) is provided on the first side of the heat exchange pipeline (100), and the second liquid separator (600) is connected to the third heat exchange branch pipeline (103), A variable flow divide heat exchanger comprising a second bypass pipe (700) connecting the first refrigerant pipe port (11) of the first unidirectional flow divider and the second liquid separator (600), The first unidirectional flow divider (200) is, A main pipe (1) including a first refrigerant pipe port (11) and a second refrigerant pipe port (12) provided at both ends, wherein the main pipe (1) is provided with a first liquid separation position (13) close to the first refrigerant pipe port (11) and a second liquid separation position (14) close to the second refrigerant pipe port (12), A branch pipe (2) has one end connected to the first liquid separation position (13) of the main pipe (1) and the other end to the third refrigerant pipe port (21), A connecting branch pipe (3) connects the second liquid separation position (14) of the main pipe (1) and the branch pipe (2), The system comprises a first sliding blocking means (4) slidably provided at the first liquid separatory position (13), When the first sliding shut-off means (4) slides to the first position (41), the first refrigerant pipe port (11) is shut off, and refrigerant flows in from the second refrigerant pipe port (12) and flows out from the third refrigerant pipe port (21). On the other hand, when the first sliding shut-off means (4) slides to the second position (42), the first refrigerant pipe port (11) is opened, and refrigerant flows in from the first refrigerant pipe port (11) and flows out from the second refrigerant pipe port (12) and the third refrigerant pipe port (21). The first sliding blocking means (4) is, A first shut-off slider (43) is provided along the cross-section of the main pipe (1) at the first liquid separation position (13) and is slidable between a first position (41) and a second position (42) of the first liquid separation position (13), A first contact slider (44) is fixedly connected to the first shut-off slider (43) and abuts against the inner wall of the main pipe (1), wherein the first contact slider (44) is slidable in conjunction with the first shut-off slider (43), A first positioning means (45) provided on the inner wall of the main pipe (1), wherein when the first sliding blocking means (4) slides to a first position (41), the first blocking slider (43) comes into contact with the first positioning means (45), The second positioning means (46) is provided on the inner wall of the main pipe (1), and includes the first contact slider (44) which contacts the second positioning means (46) when the first sliding blocking means (4) slides to a second position (42), The first cutoff slider (43) is hollow or partially hollow inside, The first cutoff slider (43) is The first bottom surface (431) facing the inside of the main pipe (1), The second bottom surface (432) facing the first refrigerant pipe opening (11), Including a first side surface (433) enclosed between the first bottom surface (431) and the second bottom surface (432), The first contact slider (44) is provided along the edge of the first bottom surface (431), the circumference of the first bottom surface (431) is the first length, the extension length of the first contact slider (44) on the first bottom surface (431) is the second length, and the second length is 1 / 3 or more of the first length and 1 / 2 or less of the first length. The distance between the first side surface (433) of the first shut-off slider (43) and the inner wall of the main tube (1) at the first liquid separation position (13) is 0.005 mm or more and 1 mm or less. The cross-section of the main tube (1) at the first liquid separation position (13) is polygonal, and the shape of the first shut-off slider (43) is the same as the shape of the cross-section at the first liquid separation position (13). The first bottom surface (431) of the first shut-off slider (43) includes a first side portion (4311) and a second side portion (4312) that are bent and connected. The first contact slider (44) includes a first contact plate (441) and a second contact plate (442) that are bent and connected, the first contact plate (441) being fixedly connected to the first side portion (4311), and the second contact plate (442) being fixedly connected to the second side portion (4312). The first sliding blocking means (4) is, A first boss (47) provided on the first side surface (433) of the first shut-off slider (43), further including a first boss (47) whose height is less than or equal to the height of the first side surface (433), The first boss (47) is provided on the side of the first sliding blocking means (4) facing the first liquid separator position (13), and the first contact slider (44) is provided on the side of the first sliding blocking means (4) away from the first liquid separator position (13), The main pipe (1) includes a first pipe segment (15) between the first refrigerant pipe opening (11) and the first liquid separation position (13), The first tube segment (15) is provided inclined toward the first liquid-separating position (13), The second one-way flow divider (400) is, A main pipe (1) including a first refrigerant pipe port (11) and a second refrigerant pipe port (12) provided at both ends, wherein the main pipe (1) is provided with a first liquid separation position (13) close to the first refrigerant pipe port (11) and a second liquid separation position (14) close to the second refrigerant pipe port (12), A branch pipe (2) has one end connected to the first liquid separation position (13) of the main pipe (1) and the other end to the third refrigerant pipe port (21), A connecting branch pipe (3) connects the second liquid separation position (14) of the main pipe (1) and the branch pipe (2), The system comprises a second sliding blocking means (5) slidably provided at the second liquid separator position (14), When the second sliding shut-off means (5) slides to the third position (51), the second refrigerant pipe port (12) is shut off, and refrigerant flows in from the first refrigerant pipe port (11) and flows out from the third refrigerant pipe port (21). On the other hand, when the second sliding shut-off means (5) slides to the fourth position (52), the second refrigerant pipe port (12) is opened, and refrigerant flows in from the second refrigerant pipe port (12) and the third refrigerant pipe port (21) and flows out from the first refrigerant pipe port (11). The second sliding blocking means (5) is, A second shut-off slider (53) is provided along the cross-section of the main pipe (1) at the second liquid separation position (14) and is slidable between the third position (51) and the fourth position (52) of the second liquid separation position (14), A second contact slider (54) is fixedly connected to the second shut-off slider (53) and abuts against the inner wall of the main pipe (1), wherein the second contact slider (54) is slidable in conjunction with the second shut-off slider (53), A third positioning means (55) provided on the inner wall of the main pipe (1), wherein when the second sliding blocking means (5) slides to the third position (51), the second blocking slider (53) comes into contact with the third positioning means (55), The fourth positioning means (56) is provided on the inner wall of the main pipe (1), and includes the second contact slider (54) which contacts the fourth positioning means (56) when the second sliding blocking means (5) slides to the fourth position (52), The second cutoff slider (53) is hollow or partially hollow inside, The second cutoff slider (53) is The third bottom surface facing the inside of the main pipe (1), The fourth bottom surface facing the second refrigerant pipe opening (12), Including a second side surface enclosed between the third bottom surface and the fourth bottom surface, The second contact slider (54) is provided along the edge of the third bottom surface, the circumference of the third bottom surface is the third length, the extension length of the second contact slider (54) on the third bottom surface is the fourth length, and the fourth length is 1 / 3 or more of the third length and 1 / 2 or less of the third length. The distance between the second side surface of the second shut-off slider (53) and the inner wall of the main tube (1) at the second liquid separation position (14) is 0.005 mm or more and 1 mm or less. The cross-section at the second liquid separation position (14) is polygonal, and the shape of the second shut-off slider (53) is the same as the shape of the cross-section at the second liquid separation position (14). The third bottom surface of the second blocking slider (53) includes a third side and a fourth side that are bent and connected, The second contact slider (54) includes a third contact plate and a fourth contact plate that are bent and connected, the third contact plate being fixedly connected to the third side, and the fourth contact plate being fixedly connected to the fourth side. The second sliding blocking means (5) is, A second boss (57) provided on the second side surface of the second shut-off slider (53), further including a second boss (57) whose height is less than or equal to the height of the second side surface, The second boss (57) is provided on the side of the second sliding blocking means (5) facing the second liquid separation position (14), and the second contact slider (54) is provided on the side of the second sliding blocking means (5) away from the second liquid separation position (14), The main pipe (1) includes a second pipe segment (16) between the second refrigerant pipe port (12) and the second liquid separation position (14). The second pipe segment (16) is provided at an inclination toward the second liquid separation position (14), A variable flow shunt heat exchanger characterized by the following features.

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