Shell and tube evaporator and air conditioning system

Abstract

The utility model relates to the technical field of heat exchange equipment, and discloses a shell and tube evaporator and an air conditioning system. The shell and tube evaporator comprises an evaporation shell, and the evaporation shell comprises a heat exchange cavity, a refrigerant inlet and a refrigerant outlet which are communicated with the heat exchange cavity, a water inlet end water chamber located at one end of the heat exchange cavity, and a rear end water chamber located at one end of the heat exchange cavity. The heat exchange pipeline is installed on the evaporation shell and located in the heat exchange cavity, the two ends of the heat exchange pipeline communicate with the water inlet end water chamber and the rear end water chamber, and the number of tube pass flows is an odd number. The return pipeline is installed on the evaporation shell, located in the heat exchange cavity and close to one side of the refrigerant outlet, the water inlet end of the return pipeline communicates with the rear end water chamber, and the water outlet end of the return pipeline and the water inlet end water chamber are located on the same side. And by arranging the return pipeline, the water outlet end and the water inlet end are both arranged on the same side when the number of the tube pass flows is odd, and the use requirements of users can be met. And the refrigerant can further exchange heat with the return pipeline, so that the heat exchange amount is increased, and the energy efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange equipment, for example, to a shell and tube evaporator and an air-conditioning system. Background Art

[0002] Central air conditioning water-cooled mainframe products consist of an evaporator, condenser, compressor, and throttling device. The evaporator is generally a shell and tube evaporator. The flooded evaporator is a common structure type of shell and tube evaporator in water-cooled mainframes.

[0003] The heat exchange process in a flooded evaporator generally adopts a single-pass, dual-pass, triple-pass, or quadruple-pass configuration, depending on the design and operating conditions of the application scenario. When an odd-numbered flow path is selected, such as a single-pass, triple-pass, or quintuple-pass, the inlet and outlet pipes are located at both ends of the evaporator. However, due to space constraints in the installation scenario, users often need to install the inlet and outlet pipes at the same end of the unit.

[0004] In related technologies, to meet user configuration requirements, odd-numbered flow paths are typically changed to even-numbered ones. However, during implementation, it was found that reducing the flow path by one would result in a decrease in flow rate, lowering the heat transfer coefficient, and reducing heat transfer capacity. Adding one flow path would increase pressure drop, leading to increased energy consumption and reduced energy efficiency for the entire water system, impacting the user experience.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a shell and tube evaporator and an air-conditioning system, which increase the heat exchange capacity, improve the heat exchange efficiency, and meet the needs of users.

[0008] In some embodiments, a shell and tube evaporator is provided, comprising: an evaporation shell, comprising a heat exchange chamber, a refrigerant inlet and a refrigerant outlet connected to the heat exchange chamber, and a water inlet water chamber located at one end of the heat exchange chamber and a rear end water chamber located at one end of the heat exchange chamber; a heat exchange pipeline, the heat exchange pipeline is installed in the evaporation shell, located in the heat exchange chamber, and both ends of the heat exchange pipeline are connected to the water inlet water chamber and the rear end water chamber, and the number of pipe flow paths of the heat exchange pipeline is an odd number; a return pipeline, the return pipeline is installed in the evaporation shell, located in the heat exchange chamber, and close to the refrigerant outlet side, the water inlet end of the return pipeline is connected to the rear end water chamber, and the water outlet end of the return pipeline and the water inlet water chamber are located on the same side.

[0009] Optionally, the evaporation shell includes: a first partition, which is arranged in the water chamber at the water inlet end, and the first partition divides the water chamber at the water inlet end into a water inlet cavity and a first cavity, the water inlet cavity is used for water inlet, and the first cavity is used for the flow of heat exchange medium; wherein, part of the pipes in the heat exchange pipeline connect the water inlet cavity and the rear end water chamber, and part of the pipes connect the first cavity and the rear end water chamber.

[0010] Optionally, the evaporation shell further includes: a second partition plate, arranged in the rear end water chamber, the second partition plate dividing the rear end water chamber into a return water chamber and a second cavity; wherein the return water chamber is connected to the water inlet end of the return pipeline, part of the pipeline in the heat exchange pipeline is connected to the water inlet chamber and the second cavity, part of the pipeline is connected to the first cavity and the second cavity, and part of the pipeline is connected to the first cavity and the return water chamber.

[0011] Optionally, the heat exchange pipeline includes: a first-pass pipeline, the two ends of which are respectively connected to the water inlet chamber and the second chamber; an intermediate pipeline, the two ends of which are respectively connected to the first chamber and the second chamber; and a terminal pipeline, which is connected to the first chamber and the return water chamber.

[0012] Optionally, the evaporating shell also includes: a heat exchange body, a heat exchange cavity is arranged in the heat exchange body, and a refrigerant inlet and a refrigerant outlet are opened on the side wall of the heat exchange body, and mounting holes are respectively opened at both ends of the heat exchange body, and the mounting holes are used to install heat exchange pipelines; a first box body is arranged at one end of the heat exchange body, forming a water inlet end water chamber with the end of the heat exchange body; a second box body is arranged at the other end of the heat exchange body, forming a rear end water chamber with the end of the heat exchange body.

[0013] Optionally, the heat exchange pipeline includes multiple heat exchange tubes, both ends of which are respectively connected to the water inlet water chamber and the rear end water chamber, and the multiple heat exchange tubes are located in the heat exchange cavity near the refrigerant inlet side.

[0014] Optionally, the return pipeline includes: a return pipe, the water inlet end of the return pipe is connected to the rear end water chamber, and the water outlet end of the return pipe and the water inlet end water chamber are located on the same side for water outlet.

[0015] Optionally, the return pipeline includes: multiple return pipes, the water inlet ends of the multiple return pipes are connected to the rear end water chamber, and the water outlet ends of the multiple return pipes and the water inlet end water chamber are located on the same side for water outlet.

[0016] Optionally, the flow area of ​​the return pipeline located in the plane where the heat exchange cavity is located is greater than or equal to the flow area of ​​the refrigerant outlet.

[0017] Optionally, the evaporation shell further includes: a water inlet pipe, which is connected to the water chamber at the water inlet end and is used for water intake; and a water outlet pipe, which is connected to the water outlet end of the return pipeline and is used for water discharge.

[0018] In some embodiments, an air-conditioning system is provided, comprising: a main unit; and a shell and tube evaporator as described in any of the above embodiments, disposed in the main unit.

[0019] The shell and tube evaporator and air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The shell and tube evaporator provided in the embodiment of the present disclosure includes an evaporation shell, a heat exchange pipeline, and a return pipeline. The evaporation shell includes a heat exchange chamber, a refrigerant inlet and a refrigerant outlet connected to the heat exchange chamber, and a water inlet end water chamber located at one end of the heat exchange chamber and a rear end water chamber located at one end of the heat exchange chamber. The heat exchange pipeline is installed in the evaporation shell and is located in the heat exchange chamber. The two ends of the heat exchange pipeline are connected to the water inlet end water chamber and the rear end water chamber. The number of tube flow paths of the heat exchange pipeline is an odd number. The return pipeline is installed in the evaporation shell and is located in the heat exchange chamber and is close to the refrigerant outlet. The water inlet end of the return pipeline is connected to the rear end water chamber, and the water outlet end of the return pipeline and the water inlet end water chamber are located on the same side.

[0021] The evaporation shell of the shell and tube evaporator provided by the present invention includes a heat exchange chamber and a water inlet end water chamber and a rear end water chamber located at both ends of the heat exchange chamber. The heat exchange chamber is used to accommodate refrigerant, and the refrigerant located in the accommodating chamber is used to exchange heat with water in the heat exchange pipeline located in the heat exchange chamber. The refrigerant enters the heat exchanger from the refrigerant inlet, and after exchanging heat with the heat exchange pipeline, it is discharged from the refrigerant outlet. The two ends of the heat exchange pipeline are respectively connected to the water inlet end water chamber and the rear end water chamber on both sides. The return pipeline is located in the heat exchange chamber and is close to the refrigerant outlet side. The heat exchange medium used for exchanging heat with the refrigerant enters the heat exchange pipeline from the water inlet end water chamber to achieve heat exchange with the refrigerant in the heat exchange chamber and then enters the rear end water chamber. The heat exchange medium after heat exchange returns to the water inlet side of the evaporation shell through the return pipeline and is discharged.

[0022] By adopting the shell-and-tube evaporator provided by the present disclosure, in applications where the heat exchange piping has an odd number of tube passes, the water outlet and water inlet can be located on the same side of the evaporator shell by providing a return line. This adapts to user requirements for evaporator installation scenarios without requiring a specific tube pass number, thus meeting the heat exchange requirements of the shell-and-tube evaporator. Furthermore, the return line is located within the heat exchange chamber, allowing the refrigerant to further exchange heat with the heat exchange medium, further increasing the heat exchange capacity and improving the energy efficiency of the shell-and-tube heat exchanger.

[0023] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0025] Figure 1 is a structural schematic diagram of a shell and tube evaporator provided in an embodiment of the present disclosure;

[0026] Figure 2 yes Figure 1 A front view of a shell and tube evaporator provided in the illustrated embodiment;

[0027] Figure 3 yes Figure 1 A top view of a shell and tube evaporator provided by the illustrated embodiment;

[0028] Figure 4 yes Figure 1 A left side view of a shell and tube evaporator provided in the illustrated embodiment;

[0029] Figure 5 yes Figure 3 An AA sectional view of a shell and tube evaporator provided in the illustrated embodiment;

[0030] Figure 6 yes Figure 3 A BB-direction cross-sectional view of a shell and tube evaporator provided in the illustrated embodiment;

[0031] Figure 7 yes Figure 3 A cross-sectional view of a shell and tube evaporator provided by the illustrated embodiment;

[0032] Figure 8 yes Figure 1 A schematic diagram of the exploded state of the structure of one end of a shell and tube evaporator provided in the illustrated embodiment;

[0033] Figure 9 yes Figure 1A schematic diagram of the exploded state of the structure of the other end of the shell and tube evaporator provided in the illustrated embodiment;

[0034] Figure 10 yes Figure 9 An enlarged view of point C of the shell and tube evaporator provided in the illustrated embodiment.

[0035] Reference numerals:

[0036] 1 Shell and tube evaporator;

[0037] 100 evaporation shell; 110 heat exchange body; 111 heat exchange chamber; 112 refrigerant inlet; 113 refrigerant outlet; 114 mounting hole; 115 support bracket; 120 first housing; 121 first partition; 122 water inlet end water chamber; 123 water inlet chamber; 124 first chamber; 130 second housing; 131 second partition; 132 first partition; 133 connecting plate; 134 second partition; 135 rear end water chamber; 136 return water chamber; 137 second chamber;

[0038] 200 heat exchange pipe; 210 water inlet pipe;

[0039] 300 return pipe; 310 outlet pipe. DETAILED DESCRIPTION

[0040] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0041] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0044] Unless otherwise stated, the term "plurality" means two or more.

[0045] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0046] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0048] In some embodiments, combined Figures 1 to 9As shown, a shell and tube evaporator 1 is provided, comprising an evaporation housing 100, a heat exchange piping 200, and a return piping 300. The evaporation housing 100 includes a heat exchange chamber 111, a refrigerant inlet 112 and a refrigerant outlet 113 communicating with the heat exchange chamber 111, a water inlet chamber 122 located at one end of the heat exchange chamber 111, and a rear end water chamber 135 located at the other end of the heat exchange chamber 111. The heat exchange piping 200 is mounted in the evaporation housing 100 and located within the heat exchange chamber 111. The heat exchange piping 200 has an odd number of tube passes connected to the water inlet chamber 122 and the rear end water chamber 135. The return pipe 300 is installed in the evaporation shell 100, located in the heat exchange chamber 111, and close to the refrigerant outlet 113. The water inlet end of the return pipe 300 is connected to the rear end water chamber 135, and the water outlet end of the return pipe 300 and the water inlet end water chamber 122 are located on the same side.

[0049] The evaporating shell 100 of the shell-and-tube evaporator 1 provided herein includes a heat exchange chamber 111 and a water inlet chamber 122 and a rear end chamber 135 located at either end of the heat exchange chamber 111. The heat exchange chamber 111 is used to accommodate refrigerant, and the refrigerant in the chamber is used to exchange heat with the heat exchange medium in the heat exchange pipeline 200 located within the heat exchange chamber 111. The refrigerant enters the heat exchange chamber 111 through the refrigerant inlet 112, exchanges heat with the heat exchange pipeline 200, and then exits through the refrigerant outlet 113. The heat exchange pipeline 200 is connected to the water inlet chamber 122 and the rear end chamber 135 at both ends, respectively. A return line 300 is located within the heat exchange chamber 111, near the refrigerant outlet 113. The heat exchange medium for exchanging heat with the refrigerant enters the heat exchange pipeline 200 from the water inlet chamber 122, exchanges heat with the refrigerant in the heat exchange chamber 111, and then enters the rear end chamber 135. The heat exchange medium after heat exchange is discharged through the return pipeline 300.

[0050] By adopting the shell-and-tube evaporator 1 provided by the present disclosure, for applications where the heat exchange piping 200 has an odd number of tube-pass flows, the return line 300 is provided, thereby locating both the water outlet and water inlet on the same side of the evaporator shell 100. This adapts to user requirements for evaporator installation scenarios without requiring a specific number of tube-pass flows, thus meeting the heat exchange requirements of the shell-and-tube evaporator. Furthermore, the return line 300 is disposed within the heat exchange chamber 111, allowing the refrigerant to further exchange heat with the heat exchange medium, further increasing the heat exchange capacity and improving the energy efficiency of the shell-and-tube heat exchanger. Furthermore, the return line 300, located on the refrigerant outlet 113 side, can contact the gaseous refrigerant, causing liquid in the gaseous refrigerant to condense upon contact with the return line 300, thereby reducing the liquid content of the gaseous refrigerant discharged from the refrigerant outlet 113. Compared to related art, this can replace a separately provided liquid baffle, simplifying the structure within the heat exchange chamber 111.

[0051] The number of pipe-pass flow refers to the number of times the heat exchange medium travels back and forth in the heat exchange pipe 200 along the length of the heat exchange pipe 200. The heat exchange medium may be water.

[0052] Taking the case where the number of tube-pass processes is three as an example, in the relevant technology, if three processes are required to meet the heat exchange requirements according to the design conditions, the water inlet and outlet ends of the shell-type heat exchanger are located at both ends of the shell-type evaporator.

[0053] By using the shell-type evaporator provided by the present invention, while keeping the number of tube-side processes unchanged at three, the water located in the rear end water chamber 135 after three-pass heat exchange is drained to the water inlet end through the set return pipe 300, so that the water outlet end and the water inlet end are located on the same side of the shell-type evaporator, thereby meeting the requirements of the use scenario of water inlet and outlet on the same side.

[0054] Optionally, combined Figure 7 and Figure 8 As shown, the evaporator housing 100 includes a first partition 121. The first partition 121 is disposed in the water inlet chamber 122, dividing the water inlet chamber 122 into a water inlet cavity 123 and a first cavity 124. The water inlet cavity 123 is used for water inflow, while the first cavity 124 is used for the flow of heat exchange medium. Part of the heat exchange piping 200 connects the water inlet cavity 123 with the rear water chamber 135, while part of the piping connects the first cavity 124 with the rear water chamber 135.

[0055] In this embodiment, the water inlet chamber 122 is separated into a mutually independent water inlet chamber 123 and a first cavity 124 by a first partition 121. The water inlet chamber 123 is used to input a heat exchange medium, such as water. The water inlet chamber 123 is connected to the rear water chamber 135 via a portion of the heat exchange pipeline 200. After the heat exchange medium enters the heat exchange pipeline 200 and exchanges heat with the refrigerant in the heat exchange chamber 111, it flows into the rear water chamber 135. The rear water chamber 135 is connected to the first cavity 124 via a portion of the heat exchange pipeline 200, allowing the heat exchange medium to enter the next heat exchange process. After completing all heat exchange processes, the heat exchange medium enters the rear water chamber 135 and is then directed back to the water inlet side of the evaporator via the return pipeline 300. The first partition 121 is provided to further separate the water inlet chamber 122 into the water inlet chamber 123 and the first cavity 124, thereby realizing a return setting for the heat exchange process.

[0056] The number of tube-pass flows is set based on the evaporator's heat exchange requirements. The number of first cavities 124 is then set based on this number. For example, if the number of tube-pass flows is three, the number of first cavities 124 is one. If the number of tube-pass flows is five, the number of first cavities 124 is two. In this case, two first partitions 121 are required to divide the water inlet chamber 122 into the water inlet chamber 123 and two first cavities 124. Other numbers of tube-pass flows are similarly calculated and are not listed here.

[0057] Optionally, combined Figure 8 As shown, the first partition 121 is arranged in an inclined shape in the water chamber 122 at the water inlet end. The first partition 121 is located at one end of the heat exchange cavity 111 lower than the other end of the first partition 121, so that the heat exchange medium in the first cavity 124 is gathered on the side of the water inlet end close to the heat exchange pipeline 200 under the action of gravity, so as to improve the flow rate and smoothness of the heat exchange medium flowing in the heat exchange pipeline 200.

[0058] Optionally, combined Figure 7 、 Figure 8 and Figure 9 As shown, the evaporator housing 100 further includes a second partition 131. The second partition 131 is disposed in the rear water chamber 135 and divides the rear water chamber 135 into a return water chamber 136 and a second chamber 137. The return water chamber 136 is connected to the water inlet end of the return line 300. A portion of the heat exchange line 200 connects to the water inlet chamber 123 and the second chamber 137, a portion connects to the first chamber 124 and the second chamber 137, and a portion connects to the first chamber 124 and the return water chamber 136.

[0059] In this embodiment, the second partition 131 separates the rear water chamber 135 into a return water chamber 136 and a second chamber 137, which are independently arranged. The return water chamber 136 is used to accommodate the heat exchange medium after heat exchange through the heat exchange pipeline 200. The inlet of the return pipeline 300 is connected to the return water chamber 136 to guide the heat exchange medium to the water inlet of the shell-type evaporator, achieving the same-side arrangement of the water inlet and water outlet.

[0060] The number of tube-pass flows is set based on the evaporator's heat exchange requirements. The number of second cavities 137 is then determined based on this number. For example, if the number of tube-pass flows is three, the number of second cavities 137 is one. If the number of tube-pass flows is five, the number of second cavities 137 is two. In this case, two second partitions 131 are required to divide the rear end water chamber 135 into the return water chamber 136 and two second cavities 137. Other numbers of tube-pass flows are similarly deduced and are not listed here.

[0061] Taking the case of three pipe-pass processes as an example, the heat exchange process of the shell-type heat exchanger is explained as follows: the heat exchange medium enters the water inlet chamber 123, passes through the water inlet chamber 123 and enters the partial heat exchange pipeline 200 corresponding to the first process, exchanges heat with the refrigerant, and flows into the second cavity 137. After passing through the second cavity 137, it returns to the partial heat exchange loop corresponding to the second process, exchanges heat with the refrigerant in the heat exchange chamber 111, and flows into the first cavity 124; after passing through the first cavity 124, it returns to the partial heat exchange pipeline 200 corresponding to the third process and enters the return water chamber 136; and then is drained to the water outlet through the return pipeline 300 connected to the return water chamber 136. The water inlet and the water outlet are both located on the same side of the shell-type heat exchanger. In the process of passing through the return pipeline 300, it can also exchange heat with the refrigerant in the gaseous state again, further increasing the heat exchange amount and improving energy efficiency.

[0062] In some examples, the second partition 131 includes a first plate body and a second plate body, and the first plate body and the second plate body are V-shaped. The size of the return water chamber 136 and the second cavity 137 separated by the second partition 131 from the rear water chamber 135 can be adjusted by adjusting the angle formed by the first plate body and the second plate body according to actual design requirements, thereby achieving adjustment of the size of the return water chamber 136 and the second cavity 137.

[0063] In some examples, combined Figure 10 As shown, the second partition 131 includes a first partition plate 132, a connecting plate 133, and a second partition plate 134. The first partition plate 132 and the second partition plate 134 are spaced apart, and the ends of the connecting plate 133 are connected to the first partition plate 132 and the second partition plate 134, respectively. An angle is formed between the connecting plate 133 and the first partition plate 132, and an angle is formed between the connecting plate 133 and the second partition plate 134. During implementation, the position and size of the first partition plate 132, the connecting plate 133, and the second partition plate 134 can be adjusted according to the spatial size of the return water chamber 136 and the second cavity 137 to adjust the spatial size of the return water chamber 136 and the second cavity 137.

[0064] Optionally, combined Figure 5 and Figure 7 As shown, along the height direction of the shell and tube evaporator 1, the return water chamber 136 is arranged close to the refrigerant outlet 113 to improve the compactness of the structural arrangement.

[0065] Optionally, the heat exchange pipeline 200 includes a first-pass pipeline, an intermediate pipeline, and a terminal pipeline. The first-pass pipeline is connected at both ends to the water inlet chamber 123 and the second chamber 137. The intermediate pipeline is connected at both ends to the first chamber 124 and the second chamber 137. The terminal pipeline is connected to the first chamber 124 and the return chamber 136.

[0066] In this embodiment, the first-pass pipeline of heat exchange pipeline 200 is used to introduce the heat exchange medium in water inlet chamber 123 into heat exchange pipeline 200. The terminal pipeline of heat exchange pipeline 200 is used for the final heat exchange of the heat exchange medium, directing the heat exchange medium into return water chamber 136. The intermediate pipelines of heat exchange pipeline 200 are used for the intermediate flow of the heat exchange medium. The number of intermediate pipelines is determined by the actual number of pipe passes and is not limited here.

[0067] Optionally, combined Figure 1 、 Figure 2 、 Figure 3 and Figure 5 、 Figure 7 As shown, the evaporation housing 100 further includes a heat exchange body 110, a first housing 120, and a second housing 130. A heat exchange chamber 111 is disposed in the heat exchange body 110, and a refrigerant inlet 112 and a refrigerant outlet 113 are provided on the sidewall of the heat exchange body 110. Mounting holes 114 are provided at each end of the heat exchange body 110 for mounting the heat exchange pipe 200. The first housing 120 is disposed at one end of the heat exchange body 110 and forms a water inlet chamber 122 with the end of the heat exchange body 110. The second housing 130 is disposed at the other end of the heat exchange body 110 and forms a rear end water chamber 135 with the end of the heat exchange body 110.

[0068] In this embodiment, the first housing 120 is removably mounted to one end of the heat exchange body 110. The first housing 120 and the heat exchange body 110 enclose a water inlet chamber 122. A first partition 121 is mounted at the end of the heat exchange body 110, located within the water inlet chamber 122, dividing the water inlet chamber 122 into an inlet cavity 123 and a first cavity 124. Furthermore, a plurality of mounting holes 114 are defined at the end of the heat exchange body 110. These mounting holes 114 are located at the ends of the heat exchange body 110 corresponding to the inlet cavity 123 and the first cavity 124. The plurality of mounting holes 114 are used to mount the heat exchange pipeline 200, thereby connecting the water inlet chamber 122 with the rear end water chamber 135 and enabling the flow of heat exchange medium within the heat exchange pipeline 200.

[0069] The second housing 130 is removably mounted on the other end of the heat exchange body 110. The second housing 130 and the end of the heat exchange body 110 enclose a rear water chamber 135. A second partition 131 is mounted on the end of the heat exchange body, located within the rear water chamber 135, dividing the rear water chamber 135 into a return water chamber 136 and a second chamber 137. The end of the heat exchange body 110 located on the side of the second housing 130 is also provided with a plurality of mounting holes 114, which are distributed in the return water chamber 136 and the second chamber 137. In this way, the two ends of the heat exchange pipeline 200 are respectively mounted in the mounting holes 114 on both sides to achieve communication between the water inlet chamber 123 and the second chamber 137, between the second chamber 137 and the first chamber 124, and between the first chamber 124 and the return water chamber 136, thereby forming a heat exchange process for the heat exchange medium.

[0070] A through hole is also provided at the end of the heat exchange body 110 corresponding to the return water chamber 136 for installing the return pipe 300. A through hole is also provided at the end of the heat exchange body 110 on the water inlet side of the water chamber 122 for installing the return pipe 300, so that the water outlet end of the return pipe 300 extends out of the heat exchange chamber 111.

[0071] Optionally, combined Figure 7 As shown, the heat exchange pipeline 200 includes multiple heat exchange tubes, both ends of which are respectively connected to the water inlet water chamber 122 and the rear end water chamber 135, and the multiple heat exchange tubes are located in the heat exchange cavity 111 near the refrigerant inlet 112.

[0072] In this embodiment, heat exchange circuit 200 includes multiple heat exchange tubes, which are installed in mounting holes 114 at both ends and located within heat exchange cavity 111. By providing multiple heat exchange tubes, the heat exchange area is increased, thereby improving heat exchange efficiency. It should be noted that the accompanying drawings only show examples of heat exchange tube installation and do not represent the actual number of heat exchange tubes used. The number of heat exchange tubes used in actual implementation is determined based on the heat exchange requirements of the air conditioning system and is not described in detail here.

[0073] Optionally, the number of the mounting holes 114 is the same as the number of the heat exchange tubes. By providing corresponding numbers of mounting holes 114 and heat exchange tubes, the installation of multiple heat exchange tubes can be achieved.

[0074] Optionally, combined Figure 5 and Figure 7 As shown, the shell-type evaporator further includes a support bracket 115, which is installed in the heat exchange chamber 111. The support bracket 115 has a connecting hole extending through the thickness of the support bracket 115, and the heat exchange pipe 200 is passed through the support bracket 115. The support bracket 115 improves the stability of the installation of the heat exchange pipe 200.

[0075] Optionally, there are one or more support brackets 115. In the case of multiple support brackets 115, the support brackets 115 are spaced apart along the length of the heat exchange chamber 111. The number of support brackets 115 can be selected based on the length of the heat exchange pipeline 200.

[0076] Optionally, combined Figure 5 、 Figure 6 and Figure 7 As shown, the return pipeline 300 includes: a return pipe, the water inlet end of the return pipe is connected to the rear end water chamber 135, and the water outlet end of the return pipe and the water inlet end water chamber 122 are located on the same side for water outlet.

[0077] In this embodiment, a return pipe is provided in the heat exchange chamber 111 , one end of the return pipe is connected to the return water chamber 136 of the rear end water chamber 135 , and the other end of the return pipe is used for water outlet.

[0078] Optionally, the cross-sectional shape of the return pipe includes but is not limited to circular, elliptical, rectangular or triangular.

[0079] Optionally, the return pipeline 300 includes: multiple return pipes, the water inlet ends of the multiple return pipes are connected to the rear end water chamber 135, and the water outlet ends of the multiple return pipes and the water inlet end water chamber 122 are located on the same side for water outlet.

[0080] In this embodiment, multiple return pipes are used to improve water return efficiency. Furthermore, multiple return pipes are used and spaced apart to increase the contact area with the gaseous refrigerant, thereby increasing the heat exchange area with the gaseous refrigerant, further increasing the heat exchange capacity and improving energy efficiency.

[0081] Optionally, the flow area of ​​the return pipeline 300 located in the plane where the heat exchange cavity 111 is located is greater than or equal to the flow area of ​​the refrigerant outlet 113 .

[0082] In this embodiment, a cross-section of the heat exchange chamber 111 is taken at the horizontal plane where the return pipe 300 is located. After deducting the area occupied by the return pipe 300 from the cross-section, the remaining area represents the flow area of ​​the gaseous refrigerant in the plane where the return pipe 300 is located within the heat exchange chamber 111. By setting the flow area to be greater than or equal to the flow area of ​​the refrigerant outlet 113, the system heat exchange efficiency is maintained.

[0083] Optionally, a plurality of return pipes are distributed at intervals along the horizontal plane to increase the contact area with the gaseous refrigerant and improve the heat exchange capacity.

[0084] Optionally, multiple return pipes are distributed at intervals along the horizontal plane and arranged in multiple layers along the direction of gravity, so as to further increase the heat exchange area and the heat exchange amount.

[0085] Optionally, the flow area of ​​the water inlet of the return pipe 300 is greater than the sum of the flow areas of the multiple mounting holes 114 provided in the return water chamber 136. Specifically, the multiple mounting holes 114 in the return water chamber 136, for mounting portions of the heat exchange pipe 200, each have a corresponding flow area. By setting the flow area of ​​the water inlet of the return pipe 300 to be greater than the sum of the flow areas of the multiple mounting holes 114 in the return water chamber 136, the return water rate is increased, thereby improving the heat exchange efficiency and energy efficiency of the shell-and-shell heat exchanger.

[0086] Optionally, combined Figure 1 and Figure 2 As shown, the evaporation housing 100 further includes: a water inlet pipe 210 and a water outlet pipe 310. The water inlet pipe 210 is connected to the water inlet chamber 122 for water intake. The water outlet pipe 310 is connected to the water outlet end of the return line 300 for water discharge.

[0087] In this embodiment, a water inlet pipe 210 and a water outlet pipe 310 are provided on the same side of the evaporator housing 100. The water inlet pipe 210 communicates with the water inlet chamber 122. The water inlet pipe 210 is mounted on the first housing 120 and communicates with the water inlet cavity 123 for inputting heat exchange medium. The water outlet pipe 310 is mounted on the evaporator housing 100 and communicates with the water outlet of the return line 300 for returning water.

[0088] Optionally, combined Figure 7 As shown, the outlet pipe 310 and the return pipe 300 are an integrated structure to facilitate assembly.

[0089] In some embodiments, an air conditioning system is provided, comprising: a main unit and the shell and tube evaporator 1 as described in any of the above embodiments, which is disposed in the main unit.

[0090] The air conditioning system provided by the embodiments of the present disclosure includes a main unit and a shell-and-tube evaporator 1 as described in any of the above embodiments. By employing the shell-and-tube evaporator 1 provided by the present disclosure, for applications where the heat exchange piping 200 has an odd number of tube-pass flows, a return pipe 300 is provided, thereby arranging both the water outlet and the water inlet on the same side of the evaporation shell 100. This adapts to the user's requirements for the evaporator's installation scenario, eliminates the need for a specific tube-pass flow number, and satisfies the heat exchange requirements of the shell-and-tube evaporator. Furthermore, the return pipe 300 is disposed within the heat exchange chamber 111, allowing the refrigerant to further exchange heat with the heat exchange medium, further increasing the heat exchange rate and improving the energy efficiency of the shell-and-tube heat exchanger. Furthermore, the return pipe 300 located on the refrigerant outlet 113 side can contact the gaseous refrigerant, causing liquid in the gaseous refrigerant to condense upon contact with the return pipe 300, thereby reducing the liquid content of the gaseous refrigerant discharged from the refrigerant outlet 113. Compared with the related art, it can replace the separately provided liquid baffle plate, thereby simplifying the structure inside the heat exchange chamber 111 .

[0091] Optionally, the main unit includes a compressor, a throttling device, and a condenser. The compressor, throttling device, condenser, and shell-type evaporator are sequentially connected to form a refrigerant flow path, enabling refrigerant circulation. The refrigerant inlet 112 and refrigerant outlet 113 of the shell-type evaporator are connected to the throttling device and the compressor's intake port.

[0092] Optionally, the host includes a water-cooled host. The air-conditioning system includes but is not limited to a central air-conditioning system.

[0093] Optionally, the main unit also includes a pump body and a cooling tower, the water inlet of the cooling tower is connected to the water outlet end of the return pipeline 300, the pump body is connected to the water outlet of the cooling tower and the water inlet chamber 123 of the heat exchange pipeline 200, and the pump body is used to drive water to circulate in the heat exchange pipeline 200, the return pipeline 300 and the cooling tower.

[0094] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A shell and tube evaporator, characterized in that: include: The evaporation shell includes a heat exchange chamber, a refrigerant inlet and a refrigerant outlet connected to the heat exchange chamber, and a water inlet end water chamber located at one end of the heat exchange chamber and a rear end water chamber located at one end of the heat exchange chamber; The heat exchange pipeline is installed in the evaporation shell and is located in the heat exchange cavity. The two ends of the heat exchange pipeline are connected to the water inlet chamber and the rear end water chamber. The number of tube passes of the heat exchange pipeline is an odd number. The return pipe is installed in the evaporator shell, located in the heat exchange cavity, and close to the refrigerant outlet side. The water inlet end of the return pipe is connected to the rear end water chamber, and the water outlet end and the water inlet end water chamber of the return pipe are located on the same side.

2. The shell and tube evaporator according to claim 1, characterized in that The evaporation housing includes: A first partition is provided in the water chamber at the water inlet end. The first partition divides the water chamber at the water inlet end into a water inlet cavity and a first cavity. The water inlet cavity is used for water inlet, and the first cavity is used for the flow of heat exchange medium. Part of the heat exchange pipeline is connected to the water inlet cavity and the rear end water chamber, and part of the pipeline is connected to the first cavity and the rear end water chamber.

3. The shell and tube evaporator according to claim 2, characterized in that The evaporation housing also includes: A second partition is provided in the rear water chamber, and the second partition divides the rear water chamber into a return water chamber and a second chamber; Among them, the return water chamber is connected to the water inlet end of the return pipeline, part of the pipeline in the heat exchange pipeline is connected to the water inlet chamber and the second cavity, part of the pipeline is connected to the first cavity and the second cavity, and part of the pipeline is connected to the first cavity and the return water chamber.

4. The shell and tube evaporator according to claim 3, characterized in that The heat exchange pipeline includes: The first-pass pipeline, the two ends of which are connected to the water inlet cavity and the second cavity respectively; an intermediate pipeline, with two ends of the intermediate pipeline respectively connected to the first cavity and the second cavity; The terminal pipeline is connected with the first cavity and the return water cavity.

5. The shell and tube evaporator according to any one of claims 1 to 4, characterized in that: The evaporation housing also includes: The heat exchange body, the heat exchange cavity is arranged in the heat exchange body, and the refrigerant inlet and the refrigerant outlet are opened on the side wall of the heat exchange body. The two ends of the heat exchange body are respectively provided with mounting holes for installing heat exchange pipes; The first box is arranged at one end of the heat exchange body and forms a water inlet chamber with the end of the heat exchange body; The second box is arranged at the other end of the heat exchange main body and forms a rear end water chamber with the end of the heat exchange main body.

6. The shell and tube evaporator according to any one of claims 1 to 4, characterized in that The heat exchange pipeline includes: Multiple heat exchange tubes, both ends of which are respectively connected to the water inlet water chamber and the rear end water chamber, and the multiple heat exchange tubes are located in the heat exchange cavity near the refrigerant inlet side.

7. The shell and tube evaporator according to any one of claims 1 to 4, characterized in that: The return line includes: A return pipe, the water inlet end of the return pipe is connected to the rear end water chamber, and the water outlet end of the return pipe and the water inlet end water chamber are located on the same side for water discharge; or Multiple return pipes are distributed at intervals in the heat exchange cavity, the water inlet ends of the multiple return pipes are connected to the rear end water chamber, and the water outlet ends of the multiple return pipes and the water inlet end water chamber are located on the same side for water outlet.

8. The shell and tube evaporator according to any one of claims 1 to 4, characterized in that: The flow area of ​​the return pipeline located on the plane where the heat exchange cavity is located is greater than or equal to the flow area of ​​the refrigerant outlet.

9. The shell and tube evaporator according to any one of claims 1 to 4, characterized in that: The evaporation housing also includes: A water inlet pipe is connected to the water inlet chamber and is used for water intake; The water outlet pipe is connected to the water outlet end of the return pipeline and is used for water outlet.

10. An air conditioning system, characterized in that: include: Host; as well as The shell and tube evaporator according to any one of claims 1 to 9, arranged in a main unit.

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