A temperature probe mounting structure, heat exchanger and refrigeration unit

Abstract

This utility model provides a temperature probe mounting structure, a heat exchanger, and a refrigeration unit, belonging to the technical field of heat exchangers. The temperature probe mounting structure includes a sleeve fixed to the shell of the heat exchanger. The shell has a mounting hole with an inner diameter of R1 and an outer diameter of R2, where R1 ≥ R2. One end of the sleeve extends through the mounting hole into the shell, and a temperature probe is installed within the sleeve. This mounting structure improves the installation method of the temperature sensing component in the heat exchanger, saving installation costs and improving the quality stability of the temperature sensing component.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a temperature sensing probe mounting structure, a heat exchanger, and a refrigeration unit. Background Technology

[0002] Shell-and-tube heat exchangers, widely used in industrial applications, rely heavily on accurate internal temperature monitoring for safe operation, efficient heat exchange, and troubleshooting. These exchangers typically incorporate a temperature sensing element to monitor the temperature inside the shell. This element usually consists of a frost-proof sleeve fixed to the shell's side wall, with the sensor located inside. See also... Figures 1-3 Currently, the installation method between the antifreeze sleeve and the shell generally adopts a straddling assembly structure, and the diameter of the opening on the shell is smaller than the inner diameter of the antifreeze sleeve. This installation method results in a large gap between the sleeve and the shell, requiring a large amount of filler metal during welding, leading to severe filler metal accumulation. Excessive heat input not only reduces weld strength but also affects the weld appearance quality, failing to meet the reliability and aesthetic requirements of industrial production for welding processes.

[0003] Furthermore, because the diameter of the opening on the shell is smaller than the inner diameter of the antifreeze sleeve, corresponding tooling must be used during the installation of the sleeve. Even so, problems such as scratches and cracks on the antifreeze sleeve are still prone to occur, which not only increases the tooling cost in the production process but also reduces assembly efficiency and affects the production schedule.

[0004] Therefore, it is necessary to improve the installation method of the temperature sensing components in existing shell-and-tube heat exchangers to overcome the shortcomings of the existing technology. Utility Model Content

[0005] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide a temperature sensing probe installation structure. This installation structure improves the installation method of the temperature sensing component of the heat exchanger, which can save the installation cost of the temperature sensing component and improve the quality stability of the temperature sensing component.

[0006] A temperature sensing probe mounting structure includes a sleeve, which is fixed to the shell of a heat exchanger;

[0007] The housing is provided with a mounting hole, the inner diameter of which is R1, and the outer diameter of which is R2, wherein R1≥R2;

[0008] One end of the sleeve extends through the mounting hole into the housing, and a temperature sensing probe is installed in the sleeve.

[0009] The sleeve is made of stainless steel, matching the shell material, with an outer diameter (R2) of 28mm, a length of 180mm, and a wall thickness of 3mm. One end of the sleeve has an external thread for connection to the subsequent temperature probe. The sleeve is aligned with the mounting hole on the shell, with one end extending approximately 120mm into the shell. The sleeve is then welded to the shell at the mating point. Because the inner diameter of the mounting hole is larger than the outer diameter of the sleeve, welding is easier, reducing the amount of welding metal used and avoiding heat buildup that could affect the weld, thus ensuring weld quality. After the sleeve is fixed, the temperature probe is screwed into it. The threads inside the sleeve mate with the external threads of the probe, ensuring a secure installation with the probe's head extending a certain distance beyond the sleeve for better contact with the heat exchange medium inside the shell and accurate temperature measurement.

[0010] This installation structure changes the installation method of the sleeve from the traditional straddling type to an insertion type, allowing the sleeve to be more deeply integrated with the shell and enhancing the connection strength between the sleeve and the shell. This improved installation method can effectively reduce the risk of sleeve loosening or falling off due to vibration or fluid impact during heat exchanger operation, thereby improving the stability and reliability of the temperature sensing component.

[0011] In a preferred embodiment of this utility model, the sleeve has a first end and a second end that are disposed opposite to each other, and the second end of the sleeve extends through the mounting hole into the housing;

[0012] Furthermore, the second end of the sleeve protrudes from the inner wall of the housing towards the center, and the minimum distance between the second end of the sleeve and the inner wall of the housing is 1cm-3cm. It should be noted that the second end of the sleeve protrudes from the inner wall of the sleeve towards the center.

[0013] In this embodiment, at the mating point between the sleeve and the mounting hole, welding is used to fix the sleeve to the housing. Since the inner diameter of the mounting hole is larger than the outer diameter of the sleeve, welding can be performed more conveniently, reducing the amount of welding metal used. At the same time, it avoids the impact of heat accumulation on the weld and ensures the welding quality.

[0014] The second end of the sleeve maintains a distance of 1-3 cm from the inner wall of the shell, providing a buffer space for the temperature sensor. When the fluid flow inside the heat exchanger causes impact or vibration, this buffer space can effectively reduce the direct impact on the temperature sensor, protecting it from damage and extending its service life. Furthermore, this distance reduces the impact of the sleeve on the copper tubes inside the shell, preventing damage to the copper tubes.

[0015] In a preferred embodiment of this invention, the end face of the second end of the sleeve is an inclined surface, and the end face of the second end is set at an angle A with the axis of the sleeve, wherein 30° < A < 45°.

[0016] Specifically, the second end of the sleeve is designed with a bevel, making the end face of the sleeve close to the inner arc of the shell, thus obtaining a larger cross-section. This allows the temperature probe to contact the water inside the shell with the maximum surface area after it extends, resulting in more accurate temperature measurements. In practical applications, the angle A is related to the diameter of the shell. In one specific embodiment, the diameter of the shell ranges from Φ245mm to Φ406mm, and the angle A ranges from 35° to 40°. For example, if the shell diameter is Φ325mm, the angle A is 37°.

[0017] In a preferred embodiment of this invention, the sleeve has an installation cavity, the side wall of the installation cavity has an internal thread, the side wall of the temperature probe has an external thread, and the temperature probe is threadedly connected to the side wall of the installation cavity.

[0018] The mounting cavity sidewall inside the casing has internal threads, while the connecting part sidewall of the temperature probe has external threads. The temperature probe is securely installed inside the casing via a threaded connection. This connection method not only improves the installation stability of the temperature probe but also enhances its vibration resistance and reliability during heat exchanger operation.

[0019] The threaded connection design makes the installation and removal of the temperature probe easier, facilitating maintenance and replacement, and reducing maintenance time and costs.

[0020] In a preferred embodiment of this invention, the temperature sensing probe includes a base and a connecting part, the connecting part being disposed around the base, and the outer wall of the connecting part being provided with an external thread;

[0021] The matrix has a cavity, and one end of the cavity has a apex, the angle of the longitudinal section of the apex being 110°-120°.

[0022] The temperature probe's substrate contains a cavity with a apex at one end. The angle of the apex's longitudinal section is 110°-120°. This design allows the sensing element to be closer to the heat exchange medium, improving the accuracy and response speed of temperature measurement. The apex design also reduces turbulence near the temperature probe, enabling the sensing element to make more uniform and better contact with the heat exchange medium, further improving the stability of temperature measurement. The temperature probe mounting structure of this application provides more stable and reliable temperature measurement data, which helps to achieve precise control of the heat exchanger, improve heat exchange efficiency, extend the service life of the heat exchanger, and thus enhance the overall performance of the heat exchanger.

[0023] In a preferred embodiment of this invention, the temperature sensor further includes a connector, which is disposed on one side of the connecting portion, and a sealing ring is provided between the connector and the connecting portion.

[0024] The connector design facilitates the installation of the temperature probe. For example, the connector can be equipped with an internal hexagonal hole, allowing the probe to be tightened in the sleeve using a wrench. A sealing ring is installed between the connector and the connection point, effectively preventing fluid leakage and ensuring a tight seal between the temperature probe and external measuring equipment. In the high-temperature, high-pressure heat exchanger operating environment, the high-temperature resistance of the sealing ring ensures a long-term stable sealing effect, reducing safety hazards and energy loss caused by leakage.

[0025] The second objective of this utility model is to provide a heat exchanger, including a housing, on which a temperature sensing probe mounting structure as described above is provided.

[0026] In a preferred embodiment of this invention, the housing is provided with the mounting hole, and the axis of the mounting hole is set at an angle B with the horizontal plane, wherein 3° < B < 5°.

[0027] The angle B allows the beveled surface of the second end of the sleeve to better approach the inner wall of the shell after the sleeve is installed in the mounting hole, resulting in a larger cross-section. This allows the temperature probe to contact the water inside the shell with the maximum surface area after it extends out, which helps to improve the accuracy of temperature detection.

[0028] In a preferred embodiment of this invention, the minimum distance between the top of the mounting hole and the axis of the housing in the height direction is 70-90mm.

[0029] The minimum distance between the top of the mounting hole and the axis of the housing is designed to be 70-90mm. This design allows the temperature probe to be installed in the optimal position inside the heat exchanger, ensuring that the temperature probe can contact the mainstream area of ​​the heat exchange medium, thereby improving the accuracy of temperature measurement; and also avoiding damage to the copper tubes inside the housing after the sleeve is installed.

[0030] The third objective of this utility model is to provide a refrigeration unit, including the heat exchanger described above.

[0031] This refrigeration unit, through optimized installation of the temperature sensing probe, can more accurately monitor temperature changes inside the heat exchanger, thereby achieving more precise refrigeration control. This not only improves refrigeration efficiency but also reduces energy waste and lowers operating costs.

[0032] The beneficial effects of this utility model are as follows:

[0033] This utility model provides a temperature probe mounting structure, which includes a sleeve fixed to the shell of a heat exchanger. The shell has a mounting hole with an inner diameter of R1 and an outer diameter of R2, where R1 ≥ R2. One end of the sleeve extends through the mounting hole into the shell, and a temperature probe is installed inside the sleeve. This mounting structure improves the installation method of the sleeve, as the inner diameter of the mounting hole is greater than or equal to the outer diameter of the sleeve, allowing the sleeve to be inserted and fixed. After the sleeve is fixed, the temperature probe is screwed into the sleeve, ensuring a secure installation. The probe tip extends a certain distance beyond the sleeve for better contact with the heat exchange medium inside the shell and accurate temperature measurement. This mounting structure changes the traditional straddling installation method of the temperature sensing component's sleeve to an insertion installation method, resulting in a stronger connection between the sleeve and the shell. This reduces the amount of metal used during welding, lowering welding costs and minimizing the impact of heat buildup on the weld, thus ensuring weld quality. Furthermore, this installation method eliminates the need for tooling to secure the sleeve, thereby improving installation efficiency and reducing labor costs.

[0034] This application also provides a heat exchanger and a refrigeration unit including the above-mentioned temperature probe mounting structure. The temperature sensing component of the heat exchanger is easy to install and reliable in quality, and can work stably for a long time, thereby helping to achieve long-term stable operation of the heat exchanger. Attached Figure Description

[0035] Figure 1 This is a perspective view of the temperature sensing component installed in the housing in the prior art provided by this utility model;

[0036] Figure 2 This is a cross-sectional view of the temperature sensing component in the prior art provided by this utility model, showing its installation in the housing;

[0037] Figure 3 This is a cross-sectional view of the sleeve being installed on the housing in the prior art provided by this utility model;

[0038] Figure 4 This is a perspective view of the temperature sensing component disposed in the housing according to an embodiment of this application provided by this utility model;

[0039] Figure 5 This is a cross-sectional view of the temperature sensing component disposed in the housing according to an embodiment of this application provided by this utility model;

[0040] Figure 6 This is a cross-sectional view of the sleeve disposed in the housing in an embodiment of this application provided by this utility model;

[0041] Figure 7 This is a schematic diagram of the sleeve provided in an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of a temperature sensing probe provided in an embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of a heat exchanger provided in an embodiment of the present invention.

[0044] Figure label:

[0045] 1. Housing; 11. Mounting hole; 2. Sleeve; 21. Mounting cavity; 3. Temperature probe; 31. Base; 32. Connecting part; 33. Connector; 34. Top corner; 4. Sealing ring. Detailed Implementation

[0046] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0047] Shell-and-tube heat exchangers typically include a temperature sensing element to monitor the temperature inside the shell. This element usually consists of a frost-resistant sleeve and a temperature probe. The frost-resistant sleeve is fixed to the side wall of the shell, and the probe is housed inside the sleeve. Current installation methods for the frost-resistant sleeve and shell commonly employ a straddling assembly structure, with the opening diameter on the shell smaller than the inner diameter of the frost-resistant sleeve. This installation method results in a large gap between the sleeve and the shell, requiring a significant amount of filler metal during welding, leading to severe filler metal buildup. Excessive heat input not only reduces weld strength but also affects weld appearance quality, failing to meet the reliability and aesthetic requirements of industrial production welding processes.

[0048] Furthermore, because the diameter of the opening on the shell is smaller than the inner diameter of the antifreeze sleeve, corresponding tooling must be used during the installation of the sleeve. Even so, problems such as scratches and cracks on the antifreeze sleeve are still prone to occur, which not only increases the tooling cost in the production process but also reduces assembly efficiency and affects the production schedule.

[0049] Based on this, this application provides a temperature sensing probe mounting structure.

[0050] Example 1

[0051] like Figures 4-8 As shown, this embodiment provides a temperature probe mounting structure, including a sleeve 2, which is fixed to the shell 1 of the heat exchanger;

[0052] The housing 1 is provided with a mounting hole 11, the inner diameter of the mounting hole 11 is R1, and the outer diameter of the sleeve 2 is R2, wherein R1≥R2;

[0053] One end of the sleeve 2 extends through the mounting hole 11 into the housing 1, and a temperature sensing probe 3 is provided in the sleeve 2.

[0054] The sleeve 2 is made of stainless steel, matching the material of the housing 1, with an outer diameter R2 of 28mm, a length of 180mm, and a wall thickness of 3mm. One end of the sleeve 2 is threaded for connection to the subsequent temperature probe 3. The sleeve 2 is aligned with the mounting hole 11 on the housing 1, with one end of the sleeve 2 passing through the mounting hole 11 and extending into the housing 1 to an insertion length of approximately 120mm. The sleeve 2 is fixed to the housing 1 by welding at the mating point with the mounting hole 11. Since the inner diameter of the mounting hole 11 is larger than the outer diameter of the sleeve 2, welding is easier, reducing the amount of welding metal used and avoiding the impact of heat accumulation on the weld, thus ensuring weld quality. After the sleeve 2 is fixed, the temperature probe 3 is screwed into the sleeve 2. The threads inside the sleeve 2 mate with the external threads of the temperature probe 3, allowing the temperature probe 3 to be securely installed inside the sleeve 2, with its head extending a certain distance out of the sleeve 2 for better contact with the heat exchange medium inside the housing 1 and accurate temperature measurement.

[0055] This installation structure changes the installation method of the sleeve 2 from the traditional straddling type to an insertion type, allowing the sleeve 2 to be more deeply integrated with the shell 1, thus enhancing the connection strength between the sleeve 2 and the shell 1. This improved installation method effectively reduces the risk of the sleeve 2 loosening or falling off due to vibration or fluid impact during heat exchanger operation, thereby improving the stability and reliability of the temperature sensing component.

[0056] Furthermore, the improved installation method eliminates the need for tooling to secure the sleeve 2. In traditional straddle-type installations, tooling is typically required to ensure the accurate relative position of the sleeve 2 and the housing 1 for welding or other fixing operations. The insertion-type installation method of this invention simplifies this process; operators can directly insert the sleeve 2 into the mounting hole 11 and secure it, significantly improving the installation efficiency of the sleeve 2, reducing the time and labor required for installation, and thus lowering labor costs.

[0057] Example 2

[0058] This embodiment is an improvement on embodiment 1.

[0059] like Figures 4-8 As shown, in this embodiment, the sleeve 2 has a first end and a second end that are disposed opposite to each other, and the second end of the sleeve 2 extends through the mounting hole 11 and into the housing 1;

[0060] Furthermore, the end of the second end of the sleeve 2 protrudes from the inner wall of the housing 1 toward the center, and the minimum distance between the end of the second end of the sleeve 2 and the inner wall of the housing 1 is 1cm-3cm.

[0061] It should be noted that the end of the second end of the sleeve 2 protrudes from the inner wall of the sleeve 2 toward the center.

[0062] In this embodiment, at the mating point between the sleeve 2 and the mounting hole 11, the sleeve 2 is fixed to the housing 1 by welding. Since the inner diameter of the mounting hole 11 is larger than the outer diameter of the sleeve 2, welding can be performed more conveniently, reducing the amount of welding metal used. At the same time, it avoids the impact of heat accumulation on the weld and ensures the welding quality.

[0063] The second end of the sleeve 2 is kept 1-3 cm away from the inner wall of the shell 1, providing a certain buffer space for the temperature sensor 3. When the fluid flow inside the heat exchanger causes impact or vibration, this buffer space can effectively reduce the direct impact on the temperature sensor 3, protect the temperature sensor 3 from damage, and extend its service life. Furthermore, this distance reduces the impact of the sleeve 2 on the copper tubes inside the shell 1, preventing damage to the copper tubes.

[0064] Furthermore, in this embodiment, the end face of the second end of the sleeve 2 is an inclined surface, and the end face of the second end is set at an angle A with the axis of the sleeve 2, wherein 30° < A < 45°.

[0065] Specifically, the end face of the second end of the sleeve 2 is designed as a bevel, making the end face of the sleeve 2 close to the inner arc of the shell 1, thus obtaining a larger cross-section. This allows the temperature probe 3 to contact the water inside the shell 1 with the maximum surface area after it extends, thereby obtaining a more accurate temperature measurement. In practical applications, the angle A is related to the diameter of the shell 1. In one specific embodiment, the diameter of the shell 1 is in the range of Φ245mm-Φ406mm, and the angle A is in the range of 35°-40°. For example, if the diameter of the shell 1 is Φ325mm, the angle A is 37°.

[0066] In a preferred embodiment, the end face of the second end of the sleeve 2 can be machined into a bevel with a certain curvature, which allows the end face of the second end to better approach the inner wall of the housing 1.

[0067] Example 3

[0068] This embodiment is an improvement on embodiment 1.

[0069] like Figures 4-8As shown, in this embodiment, the sleeve 2 is provided with an installation cavity 21, the side wall of the installation cavity 21 is provided with an internal thread, the side wall of the temperature probe 3 is provided with an external thread, and the temperature probe 3 is threadedly connected to the side wall of the installation cavity 21.

[0070] The mounting cavity 21 inside the sleeve 2 has internal threads on its side wall, and the connecting part 32 of the temperature probe 3 has external threads on its side wall. The temperature probe 3 is securely installed inside the sleeve 2 through a threaded connection. This connection method not only improves the installation stability of the temperature probe 3, but also enhances its vibration resistance and reliability during heat exchanger operation.

[0071] The threaded connection design makes the installation and removal of the temperature probe 3 more convenient, facilitating maintenance and replacement, and reducing maintenance time and costs.

[0072] Specifically, the temperature probe 3 of this application is a Pt100 type resistance temperature sensor with an accuracy class of A. A temperature-sensing element for measuring temperature is installed at the head of the temperature probe 3. The temperature probe 3 is screwed into the first end of the sleeve 2, and the threads inside the sleeve 2 engage with the external threads of the temperature probe 3, allowing the temperature probe 3 to be securely installed inside the sleeve 2. Its head can extend a certain distance out of the sleeve 2 to better contact the heat exchange medium inside the housing 1 and accurately measure the temperature.

[0073] In practical applications, external threads can be provided on a section of the sidewall of the temperature probe 3, rather than on the entire sidewall of the temperature probe 3. This design ensures the stable fixation of the temperature probe 3 while reducing processing time and production costs.

[0074] Example 4

[0075] This embodiment is an improvement on embodiment 1.

[0076] like Figures 4-8 As shown, in this embodiment, a specific implementation of the temperature sensing probe 3 is provided.

[0077] Specifically, the temperature sensing probe 3 includes a base 31 and a connecting part 32. The connecting part 32 is disposed on the periphery of the base 31, and the outer wall of the connecting part 32 is provided with an external thread.

[0078] The substrate 31 has a cavity, and one end of the cavity has a apex angle 34. The angle of the longitudinal section of the apex angle 34 is 110°-120°.

[0079] The temperature probe 3 has a cavity in its base 31, with a apex 34 at one end. The angle of the longitudinal section of the apex 34 is 110°-120°. This design allows the temperature sensing element to be closer to the heat exchange medium, improving the accuracy and response speed of temperature measurement. The apex 34 also reduces turbulence in the vicinity of the temperature probe 3, allowing the temperature sensing element to contact the heat exchange medium more uniformly and further improving the stability of temperature measurement. The temperature probe mounting structure of this application provides more stable and reliable temperature measurement data, which helps to achieve precise control of the heat exchanger, improve heat exchange efficiency, extend the service life of the heat exchanger, and thus enhance the overall performance of the heat exchanger.

[0080] In practical applications, the apex angle 34 is machined to 120°. This machining design can not only improve the detection accuracy of the temperature sensing probe 3, but also make the machining requirements of the apex angle 34 compatible with existing drill bits, thus making the probe easier to machine.

[0081] In this embodiment, the temperature sensing probe 3 further includes a connector 33, which is disposed on one side of the connecting part 32, and a sealing ring 4 is provided between the connector 33 and the connecting part 32.

[0082] The design of connector 33 facilitates the installation of the temperature probe 3. For example, connector 33 can be equipped with an internal hexagonal hole, allowing the temperature probe 3 to be fixed in the sleeve 2 by turning connector 33 with a wrench. A sealing ring 4 is provided between connector 33 and connection part 32 of the temperature probe 3. This design effectively prevents fluid leakage and ensures the sealing of the connection between the temperature probe 3 and external measuring equipment. In the high-temperature and high-pressure heat exchanger operating environment, the high-temperature resistance of sealing ring 4 ensures a long-term stable sealing effect, reducing safety hazards and energy loss caused by leakage.

[0083] Example 5

[0084] like Figures 4-9 As shown, this embodiment provides a heat exchanger, including a housing 1, on which a temperature sensing probe mounting structure as described above is provided.

[0085] In this embodiment, the housing 1 is provided with the mounting hole 11, and the axis of the mounting hole 11 is set at an angle B with the horizontal plane, wherein 3° < B < 5°.

[0086] The angle B allows the beveled surface of the second end of the sleeve 2 to better approach the inner wall of the housing 1 after the sleeve 2 is installed in the mounting hole 11, thus obtaining a larger cross-section. This allows the temperature probe 3 to contact the water inside the housing 1 with the maximum surface area after it extends out, which helps to improve the temperature detection accuracy.

[0087] More preferably, in this embodiment, the minimum distance between the top of the mounting hole 11 and the axis of the housing 1 in the height direction is 70-90mm.

[0088] The minimum distance between the top of the mounting hole 11 and the axis of the housing 1 is designed to be 70-90mm. This design allows the temperature probe 3 to be installed in the optimal position inside the heat exchanger, ensuring that the temperature probe 3 can contact the mainstream area of ​​the heat exchange medium, thereby improving the accuracy of temperature measurement; and also avoiding damage to the copper tubes inside the housing 1 after the sleeve 2 is installed.

[0089] In practical applications, the heat exchanger in this embodiment is a shell-and-tube heat exchanger. The shell 1 of the heat exchanger is made of 10mm thick carbon steel, which has good mechanical strength and corrosion resistance. Heat exchange tubes are installed on the shell 1 to meet the requirements of high-flow-rate heat exchange. Mounting holes 11 are machined on the side wall of the shell 1 for mounting temperature probes 3; the inner diameter R1 of the mounting holes 11 is designed to be 25mm. In the height direction of the shell 1, the minimum distance between the top of the mounting hole 11 and the axis of the shell 1 is designed to be 80mm. This position ensures that the temperature probe 3 can contact the mainstream area of ​​the heat exchange medium, thereby improving the accuracy of temperature measurement. Tube sheets are installed at both ends of the shell 1. The tube sheets are made of the same carbon steel material as the shell 1, providing sufficient strength to withstand the expansion force of the heat exchange tubes and the pressure during operation. Multiple tube holes are machined on the tube sheets for mounting the heat exchange tubes. The diameter of the tube holes matches the outer diameter of the heat exchange tubes, ensuring that the heat exchange tubes can be tightly mounted on the tube sheets. The tube sheet is welded to both ends of the shell 1 on both sides, forming a closed heat exchange space. End caps are installed at both ends of the heat exchanger; these end caps are made of carbon steel, the same material as the shell 1, and are connected to the shell 1 by welding. The shell 1 is also filled with coolant to facilitate heat exchange with the heat exchange tubes.

[0090] During manufacturing, after the sleeve 2 is welded and fixed, the connecting part 32 of the temperature probe 3 is screwed into the mounting cavity 21 of the sleeve 2. The internal thread of the sleeve 2 engages with the external thread of the temperature probe 3, allowing the temperature probe 3 to be securely installed inside the sleeve 2, with its head extending a certain distance beyond the sleeve 2 for better contact with the heat exchange medium inside the shell 1 and accurate temperature measurement. The connector 33 is tightly connected to the connecting part 32 via a sealing ring 4, ensuring no leakage occurs during operation.

[0091] Example 6

[0092] like Figures 4-8 As shown, this embodiment provides a refrigeration unit, including the heat exchanger described above.

[0093] By optimizing the installation structure of the temperature sensor 3, this refrigeration unit can more accurately monitor temperature changes inside the heat exchanger, thereby achieving more precise refrigeration control. This not only improves refrigeration efficiency but also reduces energy waste and lowers operating costs.

[0094] Specifically, the refrigeration unit in this embodiment includes a compressor.

[0095] The refrigeration unit comprises a condenser, an expansion valve, and an evaporator. The aforementioned heat exchanger can be used as an evaporator in this application's refrigeration unit. The evaporator employs the optimized shell-and-tube heat exchanger described above. By optimizing the installation structure of the temperature sensing probe 3, it can more accurately monitor temperature changes inside the heat exchanger, thereby achieving more precise refrigeration control. The refrigeration unit also includes a control system and some auxiliary equipment, such as an oil separator, a liquid receiver, and a dryer filter. The oil separator separates lubricating oil from the refrigerant, ensuring that the lubricating oil can smoothly return to the compressor and guarantee normal compressor lubrication. The liquid receiver stores the condensed liquid refrigerant, buffering and stabilizing the refrigerant flow. The dryer filter removes moisture and impurities from the refrigerant, preventing ice blockage and dirt blockage in the refrigeration system and ensuring its normal operation.

[0096] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0097] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0098] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A temperature sensing probe mounting structure, comprising a sleeve (2), wherein the sleeve (2) is fixed to the shell (1) of a heat exchanger, characterized in that: The housing (1) is provided with a mounting hole (11), the inner diameter of the mounting hole (11) is R1, and the outer diameter of the sleeve (2) is R2, wherein R1≥R2; One end of the sleeve (2) extends through the mounting hole (11) into the housing (1), and a temperature sensing probe (3) is provided in the sleeve (2).

2. The temperature sensor mounting structure according to claim 1, characterized in that: The sleeve (2) has a first end and a second end that are disposed opposite to each other, and the second end of the sleeve (2) extends into the housing (1) through the mounting hole (11); The end of the second end of the sleeve (2) protrudes from the inner wall of the housing (1) toward the center, and the minimum distance between the end of the second end of the sleeve (2) and the inner wall of the housing (1) is 1cm-3cm.

3. The temperature sensor mounting structure according to claim 2, characterized in that: The end face of the second end of the sleeve (2) is an inclined surface, and the end face of the second end is set at an angle A with the axis of the sleeve (2), wherein 30° < A < 45°.

4. The temperature sensor mounting structure according to any one of claims 1-3, characterized in that: The sleeve (2) is provided with an installation cavity (21), the side wall of the installation cavity (21) is provided with an internal thread, the side wall of the temperature probe (3) is provided with an external thread, and the temperature probe (3) is threadedly connected to the side wall of the installation cavity (21).

5. The temperature sensor mounting structure according to claim 4, characterized in that: The temperature sensing probe (3) includes a base (31) and a connecting part (32). The connecting part (32) is disposed on the periphery of the base (31), and an external thread is provided in the outer wall of the connecting part (32). The substrate (31) has a cavity, and one end of the cavity has a apex (34), the angle of the longitudinal section of the apex (34) is 110°-120°.

6. The temperature sensor mounting structure according to claim 5, characterized in that: The temperature sensing probe (3) also includes a connector (33), which is disposed on one side of the connecting part (32), and a sealing ring (4) is provided between the connector (33) and the connecting part (32).

7. A heat exchanger, characterized by: It includes a housing (1), on which a temperature probe mounting structure as described in any one of claims 1-6 is provided.

8. The heat exchanger according to claim 7, characterized in that: The housing (1) is provided with the mounting hole (11), and the axis of the mounting hole (11) is set at an angle B with the horizontal plane, wherein 3° < B < 5°.

9. The heat exchanger according to claim 7 or 8, characterized in that: In the height direction of the housing (1), the minimum distance between the top of the mounting hole (11) and the axis of the housing (1) is 70-90 mm.

10. A refrigeration unit characterized by: Including the heat exchanger as described in any one of claims 7-9.

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