Heat exchanger shell, heat exchanger and heat exchange unit

Abstract

The utility model discloses a heat exchanger shell, a heat exchanger and a heat exchange unit, the heat exchanger shell is arranged to be in an unclosed ring shape, the heat exchanger shell is provided with a first end face and a second end face which are suitable for a heat exchanger flow path to penetrate through, the first end face is an end face close to a gas collecting pipe, and the second end face is an end face close to a gas collecting pipe. The second end surface is far away from the gas collecting pipe; the first end face comprises at least two step faces, a step is formed between every two step faces, and the first end face is arranged to be in a step shape with the height gradually decreased from the inner side to the outer side so that a penetrating space can be provided for a detection probe. According to the utility model, the first end face is arranged to be in the step shape with the height gradually reduced from the inner side to the outer side, so that the movable space of the detection probe is increased, and the detection of the pipeline on the inner side of the end face of the heat exchanger shell can be conveniently realized.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and in particular to a heat exchanger shell, a heat exchanger and a heat exchange unit. Background Art

[0002] This section merely provides background information related to the present disclosure and may not constitute prior art.

[0003] The heat exchanger can be used as an evaporator and a condenser, and can effectively control the temperature of the indoor environment. The heat exchanger is generally composed of fins and a heat exchange tube group passing through the fins. Among them, the connection method between multiple heat exchange tubes in the heat exchange tube group is directly related to the heat exchange performance of the heat exchanger. For a large-displacement heat pump system, if a straight-row fin heat exchanger is used for its fin heat exchanger, the length of the straight-row fin heat exchanger will be very long, and the floor space will be larger. In order to reduce the floor space of the machine, a fin heat exchanger similar to the return type is designed.

[0004] In order to ensure the stability of heat exchanger operation, it is usually necessary to regularly use a heat exchanger leak detection device to perform leak detection. During the detection, a gas medium can be filled into the heat exchanger flow path, and the detection probe on the leak detection device needs to be moved to the position of the pipeline to be detected to detect the leakage of the pipeline.

[0005] Four similar finned heat exchangers are spliced ​​in sequence to form a heat exchange unit. There will be a baffle between two adjacent heat exchangers. After the baffle is removed, the detection probe can be used to detect the pipeline condition inside the heat exchanger. The gas collecting pipe and liquid dispensing pipe in each heat exchanger are located on the inner side of the heat exchanger, and the connecting pipe between the gas collecting pipe and the heat exchange tube in the heat exchanger is located on the inner side, and the connecting pipe between the gas collecting pipe and the heat exchange tube is more likely to leak. However, the end face of the heat exchanger shell is set to be flat, which means that the detection probe needs to pass through the transfer joint and the multiple rows of heat exchange tubes extending from the heat exchanger shell to detect the connecting pipe between the gas collecting pipe and the heat exchange tube. The heat exchange flow path of the heat exchanger includes multiple rows of heat exchange tubes, and the adjacent rows of heat exchange tubes are often misaligned. The detection probe is a straight tube that cannot be bent, which makes it impossible for the detection probe to pass through the transfer joint and the multiple rows of heat exchange tubes extending from the heat exchanger shell, and thus it is impossible to detect leaks in the inner row of pipes. Utility Model Content

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the end surface of the existing heat exchanger shell is set to be flat, which makes it impossible to detect leakage of the pipelines located in the inner row, thereby providing a heat exchanger shell, a heat exchanger and a heat exchange unit.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A heat exchanger shell, which is arranged in an unclosed ring shape, and has a first end face and a second end face suitable for allowing a heat exchanger flow path to pass through, the first end face is an end face close to a collecting pipe, and the second end face is an end face away from the collecting pipe; the first end face includes at least two step faces, a step is formed between every two of the step faces, and the first end face is arranged in a stepped shape with a height gradually decreasing from the inside to the outside, so as to provide a penetration space for a detection probe.

[0009] To further optimize the technical solution, an end plate is fixedly arranged on the step surface, and the end plate is suitable for allowing the heat exchange tube to pass through and position the heat exchange tube.

[0010] To further optimize the technical solution, at least one reinforcing plate is detachably connected between two adjacent end plates.

[0011] A heat exchanger, comprising:

[0012] The heat exchanger housing;

[0013] At least one heat exchanger flow path, the heat exchanger flow path comprising at least two rows of heat exchange tube groups arranged along the thickness direction of the heat exchanger shell, each row of the heat exchange tube groups respectively passing through a step surface, and two adjacent rows of heat exchange tube groups are connected through a transfer joint;

[0014] An air collecting pipe, wherein the air collecting pipe is in communication with a flow path of a heat exchanger;

[0015] A liquid dispensing pipe is connected to the flow path of the heat exchanger.

[0016] To further optimize the technical solution, the transfer joint has at least one bending section, and the bending section spans over at least one step.

[0017] Further optimizing the technical solution, the first end surface includes a first step surface, a second step surface and a third step surface arranged in sequence from the outside to the inside, a first step is formed between the first step surface and the second step surface, and a second step is formed between the second step surface and the third step surface;

[0018] The heat exchange tube group is provided with three rows, which are arranged from the outside to the inside in sequence as the first row of heat exchange tube groups, the second row of heat exchange tube groups and the third row of heat exchange tube groups, the first row of heat exchange tube groups passes through the first step surface, the second row of heat exchange tube groups passes through the second step surface, and the third row of heat exchange tube groups passes through the third step surface;

[0019] The transfer joint is a three-way joint, which includes a main pipeline, a first branch pipeline and a second branch pipeline connected thereto, the main pipeline is connected to the first row of heat exchange tube groups, the first branch pipeline is connected to the second row of heat exchange tube groups, and the second branch pipeline is connected to the third row of heat exchange tube groups; the main pipeline constitutes a first bending section and crosses the first step and the second step, the first branch pipeline and the second branch pipeline constitute a second bending section and crosses the second step.

[0020] To further optimize the technical solution, the second row of heat exchange tube groups is connected to the gas collecting pipe through the first refrigerant medium pipe, and the first refrigerant medium pipe crosses the second step; the third row of heat exchange tube groups is connected to the gas collecting pipe through the second refrigerant medium pipe.

[0021] To further optimize the technical solution, each row of the heat exchange tube group includes one heat exchange tube or a plurality of heat exchange tubes connected to each other;

[0022] The heat exchange tube comprises two annular tubes arranged at intervals in the same row, one end of the two annular tubes are connected by a U-shaped tube and pass through the second end surface, the other ends of the two annular tubes are respectively provided with pipe openings and pass through the first end surface, and the transfer joint is suitable for connecting with the pipe openings of heat exchange tubes in different rows.

[0023] To further optimize the technical solution, the heat exchanger flow path is provided with several;

[0024] The flow paths of the heat exchangers are arranged linearly and spaced inside the heat exchanger shell, or every two flow paths of the heat exchangers are arranged inside the heat exchanger shell in a mutually symmetrical manner.

[0025] A heat exchange unit, comprising:

[0026] At least two groups of the heat exchangers, the heat exchanger shells of the heat exchangers are spliced ​​in sequence, and there is a distance between the end faces of the two adjacent groups of heat exchanger shells;

[0027] At least two baffles are provided, wherein the baffles are sealed between the end surfaces of two adjacent groups of heat exchanger shells, and each of the heat exchanger shells and each of the baffles are spliced ​​into a side-enclosed annular ventilation frame.

[0028] The technical solution of the utility model has the following advantages:

[0029] 1. The utility model provides a heat exchanger shell, which improves the shape and structure of the first end face, and sets the first end face in a stepped shape with a height decreasing step by step from the inside to the outside. When the detection probe detects the pipeline located on the inside, it can pass through the space above the step from different angles, so that the detection probe can pass through the transfer joint and the heat exchange tube extending out of the heat exchanger shell, or the detection probe can directly move from the gap between the pipelines to the position of the inner pipeline. Compared with the current heat exchanger shell, the movable space of the detection probe is increased, and the detection of the pipeline located on the inner side of the end face of the heat exchanger shell can be realized very conveniently.

[0030] 2. The utility model provides a heat exchanger shell, wherein at least one reinforcing plate is detachably connected between two adjacent end plates, which plays a role in strengthening the connection, making the connection between each end plate and the heat exchanger shell more secure.

[0031] 3. The utility model provides a heat exchanger, even if two adjacent rows of heat exchanger tube groups are staggered, when performing leakage detection, the detection probe can also use other spaces on the step surface to extend into the inner pipeline position to be detected, effectively avoiding the problem that the detection probe cannot be inserted due to the flat end face of the heat exchanger shell.

[0032] 4. The utility model provides a heat exchanger, in which the length of the heat exchange tube group extending out of the heat exchanger shell remains unchanged relative to the original length. In order to ensure that the length of the heat exchanger flow path remains unchanged, the utility model extends the length of the main pipeline of the three-way joint, so that the main pipeline forms a first bending section and crosses the first step and the second step, and extends the length of the first branch pipeline, and the length of the second branch pipeline remains unchanged, so that the first branch pipeline and the second branch pipeline form a second bending section and cross the second step. Therefore, the utility model can not only ensure that the heat transfer performance of the heat exchanger flow path remains unchanged, but also ensure that the detection probe can smoothly detect each row of pipelines.

[0033] 5. The utility model provides a heat exchanger in which a plurality of heat exchanger flow paths can be arranged linearly along the heat exchanger shell, or each two adjacent heat exchanger flow paths can be symmetrically arranged as a group. The arrangement of the heat exchanger flow paths is more standardized, and each heat exchanger flow path can circulate the medium separately. There is no situation in which each heat exchanger flow path is designed to be too long, thereby increasing the heat exchange effect of the finned heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of a heat exchanger shell provided by the utility model;

[0036] Figure 2 A schematic diagram of the structure of a heat exchanger provided by the utility model;

[0037] Figure 3 For this utility model Figure 2 A partial enlarged view of

[0038] Figure 4 A structural schematic diagram of a reinforcement plate of a heat exchanger provided by the utility model;

[0039] Figure 5 A schematic diagram of the structure of a heat exchange tube of a heat exchanger provided by the utility model;

[0040] Figure 6 A schematic diagram of the structure of a heat exchange unit provided by the utility model from a first perspective;

[0041] Figure 7 This is a second perspective structural schematic diagram of a heat exchange unit provided by the utility model.

[0042] Reference numerals:

[0043] 1. Heat exchanger shell, 11. First end face, 12. Second end face, 13. Reinforcement plate, 131. Reinforcement plate body, 132. First connecting plate, 133. Second connecting plate, 14. End plate; 2. Heat exchange tube, 21. First annular pipe, 22. Second annular pipe, 23. U-shaped pipe; 3. Gas collecting pipe; 4. Liquid distributing pipe; 5. Three-way joint; 7. First refrigerant medium pipe; 8. Fan. DETAILED DESCRIPTION

[0044] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0045] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "an" as used herein may also be meant to include the plural forms. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0046] Although the terms first, second, etc. may be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second", "third", "fourth" and other numerical terms do not imply order or sequence when used in the text. In addition, in the description of the utility model, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0047] For ease of description, spatial relative terms can be used in the text to describe the relationship of an element or feature relative to another element or feature as shown in the figure, and these relative terms are, for example, "front", "rear", "middle", "inside", "longitudinal", "lateral", "side", "vertical", "outside", etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation in addition to the orientation depicted in the figure. For example, if the mechanism in the figure flips, the element described as "below other elements or features" or "below other elements or features" will be subsequently oriented to "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include the orientation on and below. The mechanism can be oriented in addition (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0048] It should be noted that the "inner annular surface" refers to the inner wall surface of the heat exchanger shell along the annular direction. "In the same row" means that the fins in the same row of fin layers are parallel and closely arranged to form a neat array. The pipes may be designed to be perpendicular to the fin layers and shuttle between the fin layers, or inside the fin layers, the pipes are arranged in a direction parallel to the fins and shuttle between the fins. The close contact between the pipes and the fins allows heat to be effectively transferred from the pipes to the fins, and then heat exchange with the surrounding fluid.

[0049] The heat exchanger can be used as an evaporator and a condenser, and can effectively control the temperature of the indoor environment. The heat exchanger is generally composed of fins and a heat exchange tube group passing through the fins. Among them, the connection method between multiple heat exchange tubes in the heat exchange tube group is directly related to the heat exchange performance of the heat exchanger. For a large-displacement heat pump system, if a straight-row fin heat exchanger is used for its fin heat exchanger, the length of the straight-row fin heat exchanger will be very long, and the floor space will be larger. In order to reduce the floor space of the machine, a fin heat exchanger similar to the return type is designed.

[0050] The heat exchanger can be used as an evaporator and a condenser, and can effectively control the temperature of the indoor environment. The heat exchanger is generally composed of fins and a heat exchange tube group passing through the fins. Among them, the connection method between multiple heat exchange tubes in the heat exchange tube group is directly related to the heat exchange performance of the heat exchanger. For a large-displacement heat pump system, if a straight-row fin heat exchanger is used for its fin heat exchanger, the length of the straight-row fin heat exchanger will be very long, and the floor space will be larger. In order to reduce the floor space of the machine, a fin heat exchanger similar to the return type is designed.

[0051] In order to ensure the stability of heat exchanger operation, it is usually necessary to regularly use a heat exchanger leak detection device to perform leak detection. During the detection, a gas medium can be filled into the heat exchanger flow path, and the detection probe on the leak detection device needs to be moved to the position of the pipeline to be detected to detect the leakage of the pipeline.

[0052] Four similar circular finned heat exchangers are spliced ​​in sequence to form a heat exchange unit. There will be a baffle between two adjacent heat exchangers. After the baffle is removed, the detection probe can be used to detect the condition of the pipes inside the heat exchanger. The gas collecting pipe and liquid dispensing pipe in each heat exchanger are located on the inner side of the heat exchanger, and the connecting pipe between the gas collecting pipe and the heat exchange tube in the heat exchanger is located on the inner side, and the connecting pipe between the gas collecting pipe and the heat exchange tube is more prone to leakage. However, the end face of the heat exchanger shell is set to be flat, which means that the detection probe needs to pass through the transfer joint and the multiple rows of heat exchange tubes extending out of the heat exchanger shell to detect the connecting pipe between the gas collecting pipe and the heat exchange tube. The heat exchange flow path of the heat exchanger includes multiple rows of heat exchange tubes, and two adjacent rows of heat exchange tubes are often staggered, that is, the first annular pipes 21 of two adjacent rows and the second annular pipes 22 of two adjacent rows are not arranged along the thickness direction of the heat exchanger shell. The detection probe is a straight tube and cannot be bent, resulting in the detection probe being unable to pass through the transfer joint and extend out of the multiple rows of heat exchange tubes of the heat exchanger shell, thereby making it impossible to perform leakage detection on the pipes located in the inner row.

[0053] Based on this, the utility model designs a heat exchanger shell, in which the end face of the heat exchanger shell is arranged to be stepped with the height decreasing step by step from the inside to the outside, thereby increasing the space at the outer position of the end face of the heat exchanger shell, facilitating the movement of the detection probe toward the inside of the heat exchanger shell, thereby better achieving the purpose of leak detection of the heat exchanger flow path.

[0054] Example 1

[0055] The specific embodiments of the present invention are described in detail below in conjunction with the heat exchanger housing of the first aspect of the present invention.

[0056] It should be noted that the heat exchanger shell of the first aspect of the present invention is only a preferred embodiment of the present invention. The heat exchanger shell of the present invention can adopt the heat exchanger shell of the first aspect of the present invention or other structures. For the convenience of explanation, the heat exchanger shell of the first aspect of the present invention is explained in detail below.

[0057] like Figure 1 As shown, this embodiment discloses a heat exchanger shell, the heat exchanger shell 1 is set to an unclosed ring shape, and the heat exchanger shell 1 has a first end face 11 and a second end face 12 suitable for allowing the heat exchanger flow path to pass through, the first end face is the end face close to the gas collecting pipe 3, and the second end face is the end face away from the gas collecting pipe 3. The first end face includes at least two step faces, and a step is formed between each two step faces. The first end face is set to a step shape with a height gradually decreasing from the inside to the outside, so as to provide a penetration space for the detection probe.

[0058] The above-mentioned heat exchanger shell improves the shape and structure of the first end face, and sets the first end face to be a step-like shape with a height gradually decreasing from the inside to the outside. When the detection probe detects the pipeline located on the inside, it can pass through the space above the step from different angles, so that the detection probe can pass through the transfer joint and the heat exchange tube 2 extending out of the heat exchanger shell, or the detection probe can be directly moved from the gap between the pipelines to the position of the inner pipeline. Compared with the current heat exchanger shell, the space where the detection probe can move is increased, and the detection of the pipeline located on the inner side of the end face of the heat exchanger shell can be very conveniently realized.

[0059] Furthermore, because the inner annular surface of the heat exchanger shell 1 is the heat exchange surface, the position closer to the inner annular surface of the heat exchanger shell 1 has a greater influence on the overall heat exchange effect of the heat exchanger, and the position located outside the heat exchanger shell 1 has a smaller influence on the overall heat exchange effect of the heat exchanger. Therefore, in this embodiment, after the first end surface is set to a stepped shape with a height decreasing step by step from the inside to the outside, the overall heat exchange effect of the heat exchanger is not greatly affected.

[0060] In some embodiments, an end plate 14 is fixedly provided on the step surface, and the end plate 14 is suitable for allowing the heat exchange tube 2 to pass through and position the heat exchange tube 2. In this embodiment, the innermost end plate connects and positions the gas collecting pipe 3 and the liquid distributing pipe 4 through a connector. The outermost end plate can be connected to the outermost end plate of the next heat exchanger through a structure such as screws to achieve the connection and positioning of the two heat exchangers. The innermost end plate and the outermost end plate are both set to L-shaped, and can also be set to other shapes, and their shapes are not limited here.

[0061] In some embodiments, Figure 4 As shown, at least one reinforcing plate 13 is detachably connected between two adjacent end plates. In this embodiment, the reinforcing plate 13 plays a role in reinforcing the connection, so that the connection between each end plate and the heat exchanger shell is more secure. The reinforcing plate 13 includes a reinforcing plate body 131, a first connecting plate 132 and a second connecting plate 133. Two first connecting plates 132 and a second connecting plate 133 are provided and are respectively located at the two ends of the reinforcing plate body 131. The first connecting plate 132 and the second connecting plate 133 are respectively provided with threaded holes. The first connecting plate 132 is suitable for connecting to an end plate on a step surface, and the second connecting plate 133 is suitable for connecting to an end plate on another step surface.

[0062] Example 2

[0063] The specific embodiments of the present invention are described in detail below in conjunction with the heat exchanger according to the second aspect of the present invention.

[0064] It should be noted that the heat exchanger of the second aspect of the utility model is only a preferred embodiment of the utility model. The heat exchanger of the utility model can adopt the heat exchanger of the second aspect of the utility model or other structures. For the convenience of explanation, the heat exchanger of the second aspect of the utility model is explained in detail below.

[0065] like Figure 2 and Figure 3 As shown, this embodiment discloses a heat exchanger, including a heat exchanger shell 1, a heat exchanger flow path, a gas collecting pipe 3 and a liquid distributing pipe 4. Among them, the heat exchanger shell 1 is the heat exchanger shell in Example 1. The heat exchanger flow path is provided with at least one, and the heat exchanger flow path includes at least two rows of heat exchange tube groups arranged along the thickness direction of the heat exchanger shell, each row of heat exchange tube groups respectively passes through a step surface, and the adjacent two rows of heat exchange tube groups are connected through a transfer joint. The gas collecting pipe 3 is connected to the heat exchanger flow path. The liquid distributing pipe 4 is connected to the heat exchanger flow path.

[0066] For the above-mentioned heat exchanger, even if two adjacent rows of heat exchanger tube groups are staggered, when performing leakage detection, the detection probe can also utilize other space on the step surface to extend into the inner pipeline position to be detected, effectively avoiding the problem that the detection probe cannot be inserted due to the flat end surface of the heat exchanger shell.

[0067] The above-mentioned heat exchanger is specifically a fin heat exchanger. The arrangement of the fins can be selectively set according to actual conditions. The fins can be set on the heat exchange tubes of the heat exchanger flow path in this embodiment, or on the inner wall surface or annular wall surface of the heat exchanger shell 1. The arranged fins can increase the overall heat exchange effect of the heat exchanger.

[0068] In some embodiments, the transfer joint has at least one bending section, and the bending section crosses at least one step. In this embodiment, the transfer joint can be a two-way joint or a three-way joint. By using the bending section crossing at least one step, the upper row of heat exchange tube groups can be connected to the next row of heat exchange tube groups through the transfer joint across the step, which is also very convenient when connecting the transfer joint.

[0069] In some embodiments, the first end surface includes a first step surface, a second step surface, and a third step surface arranged in sequence from the outside to the inside, a first step is formed between the first step surface and the second step surface, and a second step is formed between the second step surface and the third step surface.

[0070] There are three rows of heat exchange tube groups, which are arranged from the outside to the inside respectively as the first row of heat exchange tube groups, the second row of heat exchange tube groups and the third row of heat exchange tube groups. The first row of heat exchange tube groups passes through the first step surface, the second row of heat exchange tube groups passes through the second step surface, and the third row of heat exchange tube groups passes through the third step surface.

[0071] The transfer joint is a three-way joint 5, which includes a main pipeline, a first branch pipeline and a second branch pipeline connected to each other. The main pipeline is connected to the first row of heat exchange tube groups, the first branch pipeline is connected to the second row of heat exchange tube groups, and the second branch pipeline is connected to the third row of heat exchange tube groups.

[0072] During the heating operation, the finned heat exchanger acts as an evaporator. Liquid refrigerant enters from the liquid distribution pipe of the finned heat exchanger and exchanges heat with the heat source. The liquid refrigerant absorbs heat, heats up, evaporates, and turns into gaseous refrigerant, which flows out from the gas collecting pipe. Since the refrigerant is at a low pressure in the finned heat exchanger, if the flow path of the finned heat exchanger is designed to be too long, the pipeline resistance will increase, thus affecting the heat exchange performance, thereby reducing the heating capacity of the whole machine. Therefore, for heating applications, the finned heat exchanger flow needs to be designed to be shorter.

[0073] During the refrigeration operation, the finned heat exchanger acts as a condenser. The gaseous refrigerant flows in from the gas collecting pipe of the finned heat exchanger and exchanges heat with the cold source. The gaseous refrigerant releases heat, cools down, condenses, and turns into liquid refrigerant, which flows out from the liquid separator. Since the refrigerant is under high pressure in the finned heat exchanger, if the finned heat exchanger flow is designed too short, the overall condensation effect cannot be guaranteed, thereby reducing the refrigeration capacity of the whole machine. Therefore, for refrigeration applications, the finned heat exchanger flow needs to be designed to be longer.

[0074] Therefore, the length of the heat exchanger flow path needs to be designed to be moderate, so the present embodiment sets the flow path to 4 paths and sets the length of the heat exchanger flow path to 12 m. Because the first end surface of the heat exchanger shell 1 is set in a stepped shape, when the transfer joint is used to connect the heat exchange tube group across rows, if the heat exchanger flow path formed by the transfer joint and the heat exchange tube group becomes shorter, it will affect the overall heat transfer effect of the heat exchanger.

[0075] Therefore, the length of the heat exchange tube group extending out of the heat exchanger shell 1 in this embodiment remains unchanged relative to the original length. In order to ensure that the length of the heat exchanger flow path remains unchanged, the length of the main pipeline of the three-way joint is extended in this embodiment, so that the main pipeline forms a first bending section and crosses the first step and the second step, and the length of the first branch pipeline is extended, and the length of the second branch pipeline remains unchanged, so that the first branch pipeline and the second branch pipeline form a second bending section and cross the second step. Therefore, this embodiment can not only ensure that the heat transfer performance of the heat exchanger flow path remains unchanged, but also ensure that the detection probe can smoothly detect each row of pipelines.

[0076] When using the detection probe to detect the connection between the first row of heat exchange tube groups and the second row of heat exchange tube groups and the three-way joint 5, the detection probe can be directly moved to the connection. When using the detection probe to detect the connection between the first row of heat exchange tube groups and the third row of heat exchange tube groups and the three-way joint 5, the detection probe can be moved to the connection from other angles by using the space provided above the first step surface and the second step surface.

[0077] In some embodiments, the second row of heat exchange tubes is connected to the gas collecting pipe 3 through the first refrigerant pipe 7, and the first refrigerant pipe 7 crosses the second step; the third row of heat exchange tubes is connected to the gas collecting pipe 3 through the second refrigerant pipe.

[0078] In some embodiments, each row of heat exchange tube groups includes one heat exchange tube 2 or multiple heat exchange tubes 2 that are connected to each other. That is, multiple heat exchange tubes 2 can be arranged in the same row and the heat exchange tubes 2 can be connected, or one heat exchange tube 2 can be arranged in a row. In this embodiment, it is preferred that one heat exchange tube 2 is arranged in a row.

[0079] like Figure 5 As shown, the heat exchange tube 2 includes a first annular pipe 21 and a second annular pipe 22 arranged in the same row at intervals. One ends of the two annular pipes are connected through a U-shaped pipe 23 and pass through the second end surface. The other ends of the two annular pipes are respectively provided with pipe openings and pass through the first end surface. The transfer joint is suitable for connecting with the pipe openings of heat exchange tubes 2 in different rows.

[0080] In some embodiments, a plurality of heat exchanger flow paths are provided. Each heat exchanger flow path is linearly spaced inside the heat exchanger shell 1, or every two heat exchanger flow paths are arranged inside the heat exchanger shell 1 in a mutually symmetrical manner. In this embodiment, a plurality of heat exchanger flow paths can be linearly spaced along the heat exchanger shell 1, or every two adjacent heat exchanger flow paths can be symmetrically arranged as a group. The arrangement of the heat exchanger flow paths is more standardized, and each heat exchanger flow path is separately used for medium circulation. There is no situation where each heat exchanger flow path is designed to be too long, thereby increasing the heat exchange effect of the finned heat exchanger.

[0081] A fan 8 is also provided on the heat exchanger housing 1. The wind blown by the fan 8 can be transmitted along the inner annular surface of the finned heat exchanger and fully exchange heat with the inner annular surface of the finned heat exchanger.

[0082] Example 3

[0083] The specific embodiments of the present invention are described in detail below in conjunction with the heat exchange unit of the third aspect of the present invention.

[0084] It should be noted that the heat exchanger unit of the third aspect of the utility model is only a preferred embodiment of the utility model. The heat exchanger of the utility model can adopt the heat exchanger unit of the third aspect of the utility model or other structures. For the convenience of explanation, the heat exchanger unit of the third aspect of the utility model is explained in detail below.

[0085] This embodiment discloses a heat exchange unit, comprising at least two groups of heat exchangers and at least two baffles of Embodiment 2. The heat exchanger shells 1 of at least two groups of heat exchangers are spliced ​​into a side-enclosed annular ventilation frame.

[0086] like Figure 6 and Figure 7 As shown, taking four groups of heat exchangers as an example, the heat exchanger shell 1 in each group of heat exchangers includes a first side plate, a second side plate, a third side plate and a fourth side plate connected in sequence, the fourth side plate is arranged obliquely with the first side plate, and an opening is arranged between the fourth side plate and the first side plate. Two adjacent groups of heat exchangers are spliced, and the openings on the heat exchanger shells of the two diagonally arranged groups of heat exchangers are arranged oppositely. There is a spacing between the end plates of the two adjacent groups of heat exchangers and baffles are connected. Each heat exchanger shell 1 and each baffle are spliced ​​into a side-closed annular ventilation frame.

[0087] The pipeline detection process of the above heat exchange unit is as follows:

[0088] Remove the baffle between two adjacent groups of heat exchangers;

[0089] Insert the detection probe into the junction of the first row of heat exchange tubes and the transfer joint in the first heat exchanger flow path, and stay there for a while to observe whether the heat exchanger leak detection device emits an alarm buzzer;

[0090] Next, extend the probe into the inner side of the end surface of the heat exchanger shell 1 to inspect the junction between the second row of heat exchange tubes and the transfer joint of the first heat exchanger flow path;

[0091] The junctions of each row of heat exchange tubes and the transfer joints of the first heat exchanger flow path are inspected in sequence, and the junctions of the heat exchange tubes and the first refrigerant medium pipeline 7 are inspected to complete the inspection of the first heat exchanger flow path;

[0092] After completing the inspection of the first heat exchanger flow path, inspect each heat exchanger flow path in turn along the length direction of the heat exchanger shell;

[0093] After the inspection is completed, the baffle is installed between two adjacent groups of heat exchangers.

[0094] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A heat exchanger housing, characterized in that: The heat exchanger shell (1) is configured to be in the shape of an unclosed ring, and has a first end face and a second end face suitable for allowing the heat exchanger flow path to pass through, the first end face being the end face close to the gas collecting pipe (3), and the second end face being the end face away from the gas collecting pipe (3); the first end face comprises at least two step faces, a step is formed between every two of the step faces, and the first end face is configured to be in the shape of a step whose height decreases step by step from the inside to the outside, so as to provide a space for the detection probe to pass through.

2. The heat exchanger housing according to claim 1, characterized in that: An end plate is fixedly arranged on the step surface, and the end plate is suitable for allowing the heat exchange tube (2) to pass through and positioning the heat exchange tube (2).

3. The heat exchanger housing according to claim 2, characterized in that: At least one reinforcing plate (13) is detachably connected between two adjacent end plates.

4. A heat exchanger, characterized in that: include: The heat exchanger shell (1) according to any one of claims 1 to 3; At least one heat exchanger flow path, the heat exchanger flow path comprising at least two rows of heat exchange tube groups arranged along the thickness direction of the heat exchanger shell, each row of the heat exchange tube groups respectively passing through a step surface, and two adjacent rows of heat exchange tube groups are connected through a transfer joint; An air collecting pipe (3), wherein the air collecting pipe (3) is in communication with a flow path of a heat exchanger; A liquid dispensing pipe (4), wherein the liquid dispensing pipe (4) is connected to a flow path of the heat exchanger.

5. The heat exchanger according to claim 4, characterized in that: The transition joint has at least one bent section, and the bent section spans over at least one step.

6. The heat exchanger according to claim 5, characterized in that The first end surface comprises a first step surface, a second step surface and a third step surface arranged in sequence from the outside to the inside, a first step is formed between the first step surface and the second step surface, and a second step is formed between the second step surface and the third step surface; The heat exchange tube group is provided with three rows, which are arranged from the outside to the inside in sequence as the first row of heat exchange tube groups, the second row of heat exchange tube groups and the third row of heat exchange tube groups, the first row of heat exchange tube groups passes through the first step surface, the second row of heat exchange tube groups passes through the second step surface, and the third row of heat exchange tube groups passes through the third step surface; The transfer joint is a three-way joint (5), and the three-way joint (5) comprises a main pipeline, a first branch pipeline and a second branch pipeline which are connected to each other, the main pipeline is connected to the first row of heat exchange tube groups, the first branch pipeline is connected to the second row of heat exchange tube groups, and the second branch pipeline is connected to the third row of heat exchange tube groups; the main pipeline forms a first bending section and crosses the first step and the second step, and the first branch pipeline and the second branch pipeline form a second bending section and cross the second step.

7. The heat exchanger according to claim 6, characterized in that The second row of heat exchange tube groups is connected to the gas collecting pipe (3) via a first refrigerant medium pipe, and the first refrigerant medium pipe crosses the second step; the third row of heat exchange tube groups is connected to the gas collecting pipe (3) via a second refrigerant medium pipe.

8. The heat exchanger according to any one of claims 4 to 7, characterized in that: Each row of the heat exchange tube group comprises one heat exchange tube (2) or a plurality of heat exchange tubes (2) that are interconnected; The heat exchange tube (2) comprises two annular pipes arranged at intervals in the same row, one end of the two annular pipes being connected via a U-shaped pipe and passing through a second end face, the other ends of the two annular pipes being respectively provided with pipe openings and passing through a first end face, and the transfer joint is suitable for being connected to the pipe openings of heat exchange tubes (2) in different rows.

9. The heat exchanger according to any one of claims 4 to 7, characterized in that: The heat exchanger flow paths are provided with a plurality of; The flow paths of the heat exchangers are arranged linearly and spaced apart inside the heat exchanger shell (1), or every two flow paths of the heat exchangers are arranged inside the heat exchanger shell (1) in a mutually symmetrical manner.

10. A heat exchange unit, characterized in that: include: At least two groups of heat exchangers according to any one of claims 4 to 9, wherein the heat exchanger shells (1) of the heat exchangers are spliced ​​in sequence, and there is a spacing between the end faces of two adjacent groups of heat exchanger shells (1); At least two baffles are provided, wherein the baffles are sealed between the end faces of two adjacent groups of heat exchanger shells (1), and each of the heat exchanger shells (1) and each of the baffles are spliced ​​into a side-enclosed annular ventilation frame.

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