Shell and tube evaporator and air conditioning system

Abstract

The invention 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] This application relates to the field of heat exchange equipment technology, such as a shell-and-tube evaporator and an air conditioning system. Background Technology

[0002] Central air conditioning water-cooled units consist of an evaporator, condenser, compressor, and throttling device. The evaporator is generally a shell-and-tube type. Flooded evaporators are a common structural type of shell-and-tube evaporators in water-cooled units.

[0003] The heat exchange process in a flooded evaporator generally adopts a single-pass, double-pass, triple-pass, or quadruple-pass structure, depending on the design conditions of the application scenario. When an odd number of passes are selected, such as single-pass, triple-pass, or five-pass, the inlet and outlet water pipes will be located at opposite ends of the evaporator. However, due to space constraints in the installation scenario, users often need to place the inlet and outlet water 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 flow paths. However, during implementation, it was found that reducing the number of flow paths by one decreases the flow rate, leading to a lower heat transfer coefficient and reduced heat transfer capacity. Conversely, increasing the number of flow paths by one increases the pressure drop, resulting in increased energy consumption and reduced energy efficiency for the entire water system. This negatively impacts the user experience.

[0005] It should be noted that the information disclosed in the background section above 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 those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a shell-and-tube evaporator and an air conditioning system that increases heat exchange capacity and improves heat exchange efficiency to meet user needs.

[0008] In some embodiments, a shell-and-tube evaporator is provided, comprising: an evaporation shell including a heat exchange chamber, a refrigerant inlet and a refrigerant outlet communicating with the heat exchange chamber, and an inlet water chamber and a outlet water chamber located at one end of the heat exchange chamber; a heat exchange pipeline installed in the evaporation shell, located within the heat exchange chamber, with both ends of the heat exchange pipeline connected to the inlet water chamber and the outlet water chamber, and the number of tube passes in the heat exchange pipeline being odd; and a return pipeline installed in the evaporation shell, located within the heat exchange chamber, and near the refrigerant outlet, with the inlet end of the return pipeline connected to the outlet water chamber, and the outlet end of the return pipeline and the inlet water chamber located on the same side.

[0009] Optionally, the evaporator shell includes: a first partition plate disposed in the water inlet chamber, the first partition plate dividing the water inlet chamber into a water inlet cavity and a first cavity, the water inlet cavity being used for water intake, and the first cavity being used for heat exchange medium flow; wherein, a portion of the heat exchange pipeline connects the water inlet cavity and the rear water chamber, and a portion of the pipeline connects the first cavity and the rear water chamber.

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

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

[0012] Optionally, the evaporator shell further includes: a heat exchange body, a heat exchange cavity disposed on the heat exchange body, and a refrigerant inlet and a refrigerant outlet opened on the side wall of the heat exchange body, and mounting holes opened at both ends of the heat exchange body for installing heat exchange pipelines; a first housing disposed at one end of the heat exchange body, forming an inlet water chamber with the end of the heat exchange body; and a second housing disposed at the other end of the heat exchange body, forming a rear water chamber with the end of the heat exchange body.

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

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

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

[0016] Optionally, the flow area of ​​the return pipeline on 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 evaporator shell further includes: a water inlet pipe connected to the water inlet chamber for water intake; and a water outlet pipe connected to the water outlet of the return pipeline for water discharge.

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

[0019] The shell-and-tube evaporator and air conditioning system provided in this disclosure can achieve the following technical effects:

[0020] The shell-and-tube evaporator provided in this embodiment includes an evaporating shell, heat exchange piping, and a return piping. The evaporating shell includes a heat exchange chamber, a refrigerant inlet and a refrigerant outlet connected to the heat exchange chamber, and an inlet water chamber and a outlet water chamber located at one end of the heat exchange chamber. The heat exchange piping is installed in the evaporating shell, located within the heat exchange chamber, and its two ends connect the inlet water chamber and the outlet water chamber. The number of tube passes in the heat exchange piping is odd. The return piping is installed in the evaporating shell, located within the heat exchange chamber, and near the refrigerant outlet. The inlet end of the return piping is connected to the outlet water chamber, and the outlet end of the return piping is located on the same side as the inlet water chamber.

[0021] The shell-and-tube evaporator disclosed herein includes a heat exchange chamber and inlet water chambers and a rear water chamber located at both ends of the heat exchange chamber. The heat exchange chamber contains refrigerant, which exchanges heat with water in the heat exchange piping located within the chamber. The refrigerant enters the heat exchanger through the refrigerant inlet, exchanges heat with the heat exchange piping, and then exits through the refrigerant outlet. Both ends of the heat exchange piping are connected to the inlet water chamber and the rear water chamber on either side, respectively. The return pipe is located within the heat exchange chamber, near the refrigerant outlet. The heat exchange medium used for heat exchange with the refrigerant enters the heat exchange piping from the inlet water chamber, exchanges heat with the refrigerant in the heat exchange chamber, and then enters the rear water chamber. After heat exchange, the heat exchange medium returns to the inlet side of the evaporator shell via the return pipe and is discharged.

[0022] By employing the shell-and-tube evaporator provided in this disclosure, for applications where the number of tube passes in the heat exchange pipeline is odd, a return pipeline is included. This allows both the outlet and inlet ends to be located on the same side of the evaporator shell, thus meeting the user's installation requirements for the evaporator without requiring a specific number of tube passes, while still satisfying the heat exchange needs of the shell-and-tube evaporator. Furthermore, the return pipeline is located within the heat exchange chamber, enabling further heat exchange between the refrigerant and the heat exchange medium, thereby increasing the heat exchange capacity and improving the energy efficiency of the shell-and-tube heat exchanger.

[0023] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0025] Figure 1 This is a schematic diagram of the structure of a shell-and-tube evaporator provided in an embodiment of this disclosure;

[0026] Figure 2 yes Figure 1 The illustrated embodiment provides a front view of a shell-and-tube evaporator.

[0027] Figure 3 yes Figure 1 The illustrated embodiment provides a top view of a shell-and-tube evaporator;

[0028] Figure 4 yes Figure 1 Left view of the shell-and-tube evaporator provided in the illustrated embodiment;

[0029] Figure 5 yes Figure 3 A cross-sectional view along line AA of the shell-and-tube evaporator provided in the illustrated embodiment;

[0030] Figure 6 yes Figure 3 A cross-sectional view along the BB direction of the 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 in the illustrated embodiment;

[0032] Figure 8 yes Figure 1 An exploded view of one end of the shell-and-tube evaporator provided in the embodiment shown;

[0033] Figure 9 yes Figure 1A schematic diagram showing the exploded view of the other end of the shell-and-tube evaporator provided in the embodiment shown.

[0034] Figure 10 yes Figure 9 Enlarged view of section C of the shell-and-tube evaporator provided in the illustrated embodiment.

[0035] Figure label:

[0036] 1. Shell and tube evaporator;

[0037] 100 Evaporator shell; 110 Heat exchanger body; 111 Heat exchange chamber; 112 Refrigerant inlet; 113 Refrigerant outlet; 114 Mounting hole; 115 Support bracket; 120 First housing; 121 First partition plate; 122 Water inlet chamber; 123 Water inlet chamber; 124 First cavity; 130 Second housing; 131 Second partition plate; 132 First partition plate; 133 Connecting plate; 134 Second partition plate; 135 Rear water chamber; 136 Return water chamber; 137 Second cavity;

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

[0039] 300 return pipe; 310 outlet pipe. Detailed Implementation

[0040] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0041] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0043] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

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

[0045] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it 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, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

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

[0049] The shell-and-tube evaporator 1 disclosed herein includes an evaporator shell 100 comprising a heat exchange chamber 111 and inlet water chambers 122 and 135 located at both ends of the heat exchange chamber 111. The heat exchange chamber 111 contains refrigerant, which exchanges heat with the heat exchange medium in the heat exchange pipes 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 pipes 200, and then exits through the refrigerant outlet 113. The two ends of the heat exchange pipes 200 are connected to the inlet water chambers 122 and 135 on both sides, respectively. The return pipe 300 is located within the heat exchange chamber 111, near the refrigerant outlet 113. The heat exchange medium used for exchanging heat with the refrigerant enters the heat exchange pipes 200 from the inlet water chamber 122 to exchange heat with the refrigerant in the heat exchange chamber 111 before entering the 135. The heat exchange medium after heat exchange is discharged through the return pipeline 300.

[0050] By employing the shell-and-tube evaporator 1 provided in this disclosure, for application scenarios where the number of tube passes in the heat exchange pipeline 200 is odd, the return pipeline 300 is provided, and both the outlet and inlet are located on the same side of the evaporation shell 100. This adapts to the user's installation requirements for the evaporator and eliminates the need for a specific number of tube passes, thus meeting the heat exchange requirements of the shell-and-tube evaporator. Furthermore, the return pipeline 300 is located within the heat exchange chamber 111, allowing the refrigerant to further exchange heat with the heat exchange medium, thereby increasing the heat exchange capacity and improving the energy efficiency of the shell-and-tube heat exchanger. Additionally, the return pipeline 300, located on the refrigerant outlet 113 side, can contact the gaseous refrigerant, causing the liquid in the gaseous refrigerant to condense upon contact with the return pipeline 300, reducing the liquid content of the gaseous refrigerant discharged from the refrigerant outlet 113. Compared to related technologies, this can replace a separately installed baffle plate, simplifying the structure within the heat exchange chamber 111.

[0051] The tube pass number refers to the number of times the heat exchange medium travels back and forth along the length of the heat exchange pipe 200. Water can be used as the heat exchange medium.

[0052] Taking a three-pass tube heat exchanger as an example, in related technologies, if a three-pass tube heat exchanger is required to meet the heat exchange requirements according to the design conditions, the inlet and outlet ends of the shell heat exchanger are located at the two ends of the shell evaporator.

[0053] Using the shell-type evaporator provided in this disclosure, while keeping the number of tube passes unchanged at three passes, the water located in the rear water chamber 135 after heat exchange in three passes is diverted to the inlet end through the set return pipe 300, so that the outlet end and the inlet end are located on the same side of the shell-type evaporator, thereby meeting the needs of the application scenario of water entering and exiting on the same side.

[0054] Optionally, combined Figure 7 and Figure 8 As shown, the evaporator shell 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 an inlet cavity 123 and a first cavity 124. The inlet cavity 123 is used for water intake, and the first cavity 124 is used for the flow of the heat exchange medium. A portion of the heat exchange pipeline 200 connects the inlet cavity 123 and the rear water chamber 135, and a portion of the pipeline connects the first cavity 124 and the rear water chamber 135.

[0055] In this embodiment, the inlet water chamber 122 is separated into an independent inlet chamber 123 and a first chamber 124 by a first partition 121. The inlet chamber 123 is used to input the heat exchange medium, such as water. The inlet chamber 123 is connected to the rear water chamber 135 through a portion of the heat exchange pipe 200. After the heat exchange medium enters the heat exchange pipe 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 chamber 124 through a portion of the heat exchange pipe 200, so that the heat exchange medium can enter the next heat exchange process until the entire heat exchange process is completed and then enters the rear water chamber 135, and is guided back to the inlet side of the evaporator through the return pipe 300. By setting the first partition 121 to separate the inlet water chamber 122 into the inlet chamber 123 and the first chamber 124, a reversal of the heat exchange process is achieved.

[0056] The number of tube passes is set according to the heat exchange requirements of the evaporator. The number of first chambers 124 is then determined based on the number of tube passes. For example, with three tube passes, there is one first chamber 124. With five tube passes, there are two first chambers 124, requiring two first partitions 121 to divide the inlet water chamber 122 into an inlet chamber 123 and two first chambers 124. Other numbers of tube passes follow the same logic and are not listed here.

[0057] Optionally, combined Figure 8 As shown, the first baffle 121 is inclinedly disposed in the water inlet chamber 122. One end of the first baffle 121 located in the heat exchange cavity 111 is lower than the other end of the first baffle 121, thereby causing the heat exchange medium located in the first cavity 124 to converge on the side near the water inlet of the heat exchange pipeline 200 under the action of gravity, so as to improve the flow rate and smoothness of the heat exchange medium in the heat exchange pipeline 200.

[0058] Optionally, combined Figure 7 , Figure 8 and Figure 9 As shown, the evaporator shell 100 further includes a second partition 131. The second partition 131 is disposed in the rear water chamber 135, dividing 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 inlet end of the return pipeline 300. Part of the heat exchange pipeline 200 connects to the inlet water chamber 123 and the second chamber 137, part of the pipeline connects to the first chamber 124 and the second chamber 137, and part of the pipeline connects to the first chamber 124 and the return water chamber 136.

[0059] In this embodiment, the second partition 131 divides 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 after heat exchange to the inlet end of the shell-type evaporator, so as to realize that the inlet end and the outlet end are set on the same side.

[0060] The number of tube passes is set according to the heat exchange requirements of the evaporator. The number of second chambers 137 is then determined based on the number of tube passes. For example, with three tube passes, there is one second chamber 137. With five tube passes, there are two second chambers 137, requiring two second baffles 131 to divide the rear water chamber 135 into a return water chamber 136 and two second chambers 137. Other numbers of tube passes follow the same logic and are not listed here.

[0061] Taking a three-pass tube flow as an example, the heat exchange process of a shell-and-shell heat exchanger is explained as follows: The heat exchange medium enters the inlet chamber 123, then enters the heat exchange pipeline 200 corresponding to the first pass, exchanges heat with the refrigerant, and flows into the second chamber 137. After passing through the second chamber 137, it returns to the heat exchange loop corresponding to the second pass, exchanges heat with the refrigerant in the heat exchange chamber 111, and flows into the first chamber 124. After passing through the first chamber 124, it returns to the heat exchange pipeline 200 corresponding to the third pass and enters the return chamber 136. Finally, it is guided to the outlet end through the return pipeline 300 connected to the return chamber 136. The inlet and outlet ends are located on the same side of the shell-and-shell heat exchanger. During the return process through the return pipeline 300, it can also exchange heat again with the gaseous refrigerant, further increasing the heat exchange capacity and improving energy efficiency.

[0062] In some examples, the second partition 131 includes a first plate and a second plate, which are V-shaped. The second partition 131 divides the return water chamber 136 and the second cavity 137 of the rear water chamber 135 into spaces. The size of these spaces can be adjusted by changing the angle formed by the first plate and the second plate according to actual design requirements, thereby adjusting 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 132, a connecting plate 133, and a second partition 134. The first partition 132 and the second partition 134 are spaced apart, and both ends of the connecting plate 133 are connected to the first partition 132 and the second partition 134, respectively. An angle is formed between the connecting plate 133 and the first partition 132, and an angle is formed between the connecting plate 133 and the second partition 134. During implementation, the positions and dimensions of the first partition 132, the connecting plate 133, and the second partition 134 can be adjusted according to the spatial dimensions of the return water chamber 136 and the second chamber 137 to adjust the spatial dimensions of the return water chamber 136 and the second chamber 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 located on the side near the refrigerant outlet 113 to improve the compactness of the structural layout.

[0065] Optionally, the heat exchange pipeline 200 includes a primary pipeline, intermediate pipelines, and a terminal pipeline. The two ends of the primary pipeline are connected to the inlet chamber 123 and the second chamber 137, respectively. The two ends of the intermediate pipeline are connected to the first chamber 124 and the second chamber 137, respectively. The terminal pipeline connects the first chamber 124 and the return chamber 136.

[0066] In this embodiment, the first-pass pipe of the heat exchange pipeline 200 is used to introduce the heat exchange medium from the inlet chamber 123 into the heat exchange pipeline 200. The last-pass pipe of the heat exchange pipeline 200 is used for the final stage of heat exchange, guiding the heat exchange medium to the return chamber 136. The intermediate pipes of the heat exchange pipeline 200 are used for intermediate processes of the heat exchange medium; the number of intermediate pipes is determined according to the actual number of tube passes and is not limited here.

[0067] Optionally, combined Figure 1 , Figure 2 , Figure 3 and Figure 5 , Figure 7 As shown, the evaporator shell 100 further includes: a heat exchange body 110, a first housing 120, and a second housing 130. A heat exchange chamber 111 is disposed on the heat exchange body 110, and a refrigerant inlet 112 and a refrigerant outlet 113 are formed on the side wall of the heat exchange body 110. Mounting holes 114 are respectively provided at both ends of the heat exchange body 110 for mounting heat exchange pipes 200. The first housing 120 is disposed at one end of the heat exchange body 110, forming an inlet water 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, forming a rear water chamber 135 with the end of the heat exchange body 110.

[0068] In this embodiment, a first housing 120 is detachably installed at one end of the heat exchange body 110, and the first housing 120 and the heat exchange body 110 enclose an inlet water chamber 122. A first partition 121 is installed at the end of the heat exchange body 110, located within the inlet water chamber 122, dividing the inlet water chamber 122 into an inlet cavity 123 and a first cavity 124. Furthermore, a plurality of mounting holes 114 are provided at the end of the heat exchange body 110, distributed 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 install a heat exchange pipeline 200 to connect the inlet water chamber 122 and the rear water chamber 135, enabling the flow of the heat exchange medium within the heat exchange pipeline 200.

[0069] The second housing 130 is detachably installed at the other end of the heat exchange body 110, and the second housing 130 and the end of the heat exchange body 110 enclose the rear water chamber 135. The second partition 131 is installed at the end of the heat exchange, located inside 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 multiple mounting holes 114, which are distributed in the return water chamber 136 and the second chamber 137. In this way, both ends of the heat exchange pipeline 200 are respectively installed in the mounting holes 114 on both sides to realize the communication between the inlet chamber 123 and the second chamber 137, the communication between the second chamber 137 and the first chamber 124, and the communication between the first chamber 124 and the return water chamber 136, forming a heat exchange process of 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 side of the inlet water chamber 122 for installing the return pipe 300, so that the 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. The two ends of the multiple heat exchange tubes are connected to the inlet water chamber 122 and the rear water chamber 135, respectively. The multiple heat exchange tubes are located in the heat exchange cavity 111 on the side near the refrigerant inlet 112.

[0072] In this embodiment, the heat exchange pipeline 200 includes multiple heat exchange tubes, which are installed in mounting holes 114 at both ends within the heat exchange chamber 111. By using 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 an example 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 according to the heat exchange requirements of the air conditioning system and will not be specifically described here.

[0073] Optionally, the number of mounting holes 114 is the same as the number of heat exchange tubes. By setting a corresponding number of mounting holes 114 and heat exchange tubes, multiple heat exchange tubes can be installed.

[0074] Optionally, combined Figure 5 and Figure 7 As shown, the shell-type evaporator also includes a support frame 115, which is installed inside the heat exchange chamber 111. The support frame 115 has a through hole extending through its thickness, and the heat exchange pipe 200 passes through the support frame 115. By setting the support frame 115, the stability of the heat exchange pipe 200 installation is improved.

[0075] Optionally, the number of support brackets 115 may be one or more. In the case of multiple support brackets 115, the multiple support brackets 115 are spaced apart along the length of the heat exchange chamber 111. The number of support brackets 115 can be selected according to 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 inlet end of which is connected to the rear water chamber 135, and the outlet end of the return pipe and the inlet end water chamber 122 are located on the same side for water discharge.

[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 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 shapes.

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

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

[0081] Optionally, the flow area of ​​the return pipe 300 on 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 is drawn on the horizontal plane where the return pipe 300 is located within the heat exchange cavity 111. The area remaining after deducting the area occupied by the return pipe 300 is the flow area of ​​the gaseous refrigerant within the plane where the return pipe 300 is located in the heat exchange cavity 111. The flow area is set to be greater than or equal to the flow area of ​​the refrigerant outlet 113 to meet the system's heat exchange efficiency requirements.

[0083] Optionally, multiple return pipes are spaced apart along the horizontal plane to increase the contact area with the gaseous refrigerant and improve heat exchange.

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

[0085] Optionally, the flow area of ​​the inlet of the return pipe 300 is greater than the sum of the flow areas of the plurality of mounting holes 114 opened in the return water cavity 136. That is, the plurality of mounting holes 114 located in the return water cavity 136 for installing part of the heat exchange pipe 200 have their own flow areas at their ports. By setting the flow area of ​​the inlet of the return pipe 300 to be greater than the sum of the flow areas of the plurality of mounting holes 114 located in the return water cavity 136, the return water rate is increased, thereby improving the heat exchange efficiency of the shell-type heat exchanger and improving energy efficiency.

[0086] Optionally, combined Figure 1 and Figure 2 As shown, the evaporator shell 100 also includes an inlet pipe 210 and an outlet pipe 310. The inlet pipe 210 is connected to the inlet water chamber 122 and is used for water intake. The outlet pipe 310 is connected to the outlet end of the return pipe 300 and is used for water discharge.

[0087] In this embodiment, an inlet pipe 210 and an outlet pipe 310 are provided on the same side of the evaporator shell 100. The inlet pipe 210 is connected to the inlet water chamber 122. The inlet pipe 210 is installed in the first housing 120 and connected to the inlet chamber 123 for inputting the heat exchange medium. The outlet pipe 310 is installed in the evaporator shell 100 and connected to the outlet end of the return pipe 300 for returning water.

[0088] Optionally, combined Figure 7 As shown, the outlet pipe 310 and the return pipe 300 are integrated into one unit for easy assembly.

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

[0090] The air conditioning system provided in this 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 in this disclosure, for application scenarios where the number of tube passes in the heat exchange pipeline 200 is odd, a return pipeline 300 is provided, and the outlet and inlet water ends are both located on the same side of the evaporator shell 100. This adapts to the user's installation requirements for the evaporator and eliminates the need for a specific number of tube passes, thus meeting the heat exchange requirements of the shell-and-tube evaporator. Furthermore, the return pipeline 300 is located 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. Additionally, the return pipeline 300 located on the refrigerant outlet 113 side can contact the gaseous refrigerant, causing the liquid in the gaseous refrigerant to condense upon contact with the return pipeline 300, reducing the liquid content of the gaseous refrigerant discharged from the refrigerant outlet 113. Compared to related technologies, it can replace the separately installed baffle plate, 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-and-shell evaporator are connected in sequence to form a refrigerant flow path, realizing refrigerant circulation. The refrigerant inlet 112 and refrigerant outlet 113 of the shell-and-shell evaporator are connected to the throttling device and the compressor's suction port.

[0092] Optionally, the main unit may include a water-cooled main unit. 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 inlet of the cooling tower is connected to the outlet of the return pipe 300, and the pump body is connected to the outlet of the cooling tower and the inlet chamber 123 of the heat exchange pipe 200. The pump body is used to drive water to circulate in the heat exchange pipe 200, the return pipe 300, and the cooling tower.

[0094] The foregoing description and accompanying drawings fully illustrate 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. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. 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 evaporator shell includes a heat exchange chamber, a refrigerant inlet and a refrigerant outlet connected to the heat exchange chamber, a water inlet chamber at one end of the heat exchange chamber, and a water outlet chamber at one end of the heat exchange chamber. The heat exchange pipeline is installed in the evaporator shell and located inside the heat exchange chamber. Both ends of the heat exchange pipeline are connected to the inlet water chamber and the outlet water chamber. The number of tube passes in the heat exchange pipeline is an odd number. The return pipe is installed on the evaporator shell, located inside the heat exchange chamber, and close to the refrigerant outlet. The inlet end of the return pipe is connected to the rear water chamber, and the outlet end and the 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 evaporator shell includes: The first partition is disposed in the water inlet chamber, which divides the water inlet chamber into an inlet cavity and a first cavity. The inlet cavity is used for water intake, and the first cavity is used for the flow of heat exchange medium. Among them, some of the heat exchange pipelines connect the inlet water chamber and the rear water chamber, and some of the pipelines connect the first chamber and the rear water chamber.

3. The shell-and-tube evaporator according to claim 2, characterized in that, The evaporator shell also includes: The second partition is located in the rear water chamber, which divides the rear water chamber into a return water chamber and a second chamber. The return water chamber is connected to the inlet end of the return pipeline. Some pipelines in the heat exchange pipeline are connected to the inlet water chamber and the second chamber, some pipelines are connected to the first chamber and the second chamber, and some pipelines are connected to the first chamber and the return water chamber.

4. The shell-and-tube evaporator according to claim 3, characterized in that, The heat exchange piping includes: The first pipeline connects to the inlet chamber and the second chamber at its two ends, respectively. The intermediate pipeline connects the first cavity and the second cavity at its two ends, respectively. The end pipe connects 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 evaporator shell also includes: The heat exchanger body, the heat exchange chamber are located in the heat exchanger body, and the refrigerant inlet and refrigerant outlet are opened on the side wall of the heat exchanger body. The heat exchanger body has mounting holes at both ends for installing heat exchange pipelines. The first chamber is located at one end of the heat exchange body, forming an inlet water chamber with the end of the heat exchange body; The second chamber is located at the other end of the heat exchange body, forming a rear water chamber with the end of the heat exchange body.

6. The shell-and-tube evaporator according to any one of claims 1 to 4, characterized in that, Heat exchange piping includes Multiple heat exchange tubes are connected at both ends to the inlet water chamber and the rear water chamber, respectively, and are located inside the heat exchange cavity near the refrigerant inlet.

7. The shell-and-tube evaporator according to any one of claims 1 to 4, characterized in that, The return pipeline includes: A return pipe, with its inlet connected to the rear water chamber, and its outlet and inlet water chambers located on the same side for water discharge; or Multiple return pipes are spaced apart within the heat exchange chamber. The inlet end of each return pipe is connected to the rear water chamber, and the outlet end and inlet water chamber of each return pipe are located on the same side for water discharge.

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 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 evaporator shell also includes: The inlet pipe is connected to the inlet water chamber and is used for water intake. The outlet pipe is connected to the outlet end of the return pipe and is used for water discharge.

10. An air conditioning system, characterized in that, include: Host; as well as The shell-and-tube evaporator as described in any one of claims 1 to 9 is disposed in the main unit.

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