Plate heat exchanger

Abstract

The embodiment of the invention relates to the technical field of heat exchangers, and particularly discloses a plate heat exchanger which comprises a shell, a heat exchanger and a heat exchanger, the heat exchange unit comprises a heat exchange shell and a heat exchange piece, the heat exchange shell is arranged in the containing cavity, a first heat exchange flow channel extending in the first direction is arranged in the heat exchange shell, and the heat exchange piece is arranged in the first heat exchange flow channel; at least part of the partition plate is movably connected to the interior of the containing cavity of the shell so as to divide the containing cavity into a first sub-cavity and a second sub-cavity, and the second sub-cavity communicates with the first heat exchange runner; and the first driver is connected to the shell, and the power output end of the first driver is in transmission connection with the partition plate. According to the application, the temperature of the first fluid at the outlet of the shell is adjusted in real time, the constancy of the temperature of the first fluid at the outlet of the shell is ensured, the outlet temperature can smoothly reach the standard, and the subsequent normal use of the first fluid is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a plate heat exchanger. Background Art

[0002] Plate heat exchanger is a highly efficient heat exchange equipment, widely used in petrochemical, electric power, metallurgy, food and other industries.

[0003] With the continuous improvement of energy conservation and emission reduction requirements, the demand for efficient heat exchange equipment is also growing. Plate heat exchangers have the advantages of compact structure, high heat exchange efficiency, and low pressure drop, and have broad application prospects in the industrial field. However, the outlet temperature of the fluid in the existing plate heat exchanger is difficult to adjust, resulting in the plate heat exchanger not having the function of adjusting the outlet temperature and lacking the flexibility of adjusting the outlet temperature. Summary of the invention

[0004] An embodiment of the present application provides a plate heat exchanger to ensure the constancy of the fluid temperature at the outlet of the shell.

[0005] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0006] In one aspect, a plate heat exchanger is provided, having a first orientation, comprising:

[0007] A housing is provided with a receiving cavity;

[0008] A heat exchange unit, the heat exchange unit comprising: a heat exchange shell and a heat exchange element, the heat exchange shell is arranged in the accommodating cavity, and a first heat exchange channel extending along a first direction is arranged in the heat exchange shell, the heat exchange element is arranged in the first heat exchange channel, the first heat exchange channel is arranged to flow a first fluid to be cooled, and the heat exchange element is arranged to flow a second fluid to be heated;

[0009] a partition plate, at least a portion of which is movably connected to the housing chamber of the housing to divide the housing chamber into a first sub-chamber and a second sub-chamber, wherein the second sub-chamber is in communication with the first heat exchange channel, and the first sub-chamber is used to store a first fluid that does not participate in heat exchange; and

[0010] The first driver is connected to the housing, and the power output end of the first driver is transmission-connected to the partition plate. The first driver is configured to control the opening degree of the partition plate to connect the first sub-chamber and the second sub-chamber to control the mixing of the first fluid that has completed heat exchange in the first heat exchange channel and the first fluid that has not participated in heat exchange in the first sub-chamber.

[0011] In addition to or as an alternative to one or more of the features disclosed above, the partition plate includes: a partition body connected to the accommodating cavity of the housing to divide the accommodating cavity into a first sub-cavity and a second sub-cavity, and a through hole is opened on the partition body; and

[0012] The valve plate part is movably connected to the through hole of the partition body. The power output end of the first driver is transmission-connected to the valve plate part. The first driver is configured to drive the valve plate part to move so as to adjust the opening degree of the through hole.

[0013] In addition to or as an alternative to one or more of the features disclosed above, the first driver is connected to the outer wall of the housing;

[0014] The plate heat exchanger also includes: a first transmission member, the first transmission member is inserted into the shell, part of the first transmission member is arranged in the accommodating cavity and is transmission-connected to the valve plate part, and the other part of the first transmission member is located outside the shell and is transmission-connected to the power output end of the first driver.

[0015] In addition to or as an alternative to one or more of the features disclosed above, the invention further includes: a sealing member disposed at the connection between the first transmission member and the housing.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the heat exchange housing is provided with a first inlet and a first outlet on both sides in the first direction, and the first inlet and the first outlet are both communicated with the first heat exchange channel;

[0017] The shell is provided with a second inlet and a second outlet. The second inlet is arranged close to the first inlet, the second inlet is communicated with the first inlet and the first sub-cavity respectively, and the second outlet is communicated with the first outlet and the second sub-cavity respectively.

[0018] In addition to or as an alternative to one or more features disclosed above, the partition plate is arranged away from the second inlet relative to the first inlet, and the distance between the partition plate and the first inlet is H mm, satisfying: 300≤H≤500.

[0019] In addition to one or more of the features disclosed above, or as an alternative, it also includes: a temperature sensor and a controller, the temperature sensor is arranged at the second outlet, the temperature sensor is used to sense the temperature of the first fluid at the second outlet; the controller is electrically or wirelessly connected to the temperature sensor and the first driver respectively.

[0020] In addition to or as an alternative to one or more of the features disclosed above, the invention further comprises: a return pipe, one end of which is connected to the second outlet, and the other end of which is connected to the first inlet, and the return pipe is used to return the first fluid at the second outlet;

[0021] A reflux driver is disposed on the reflux pipe, and the reflux driver is electrically or wirelessly connected to the controller; and

[0022] The cooling element surrounds the outer surface of the return pipe and is used to cool the first fluid in the return pipe.

[0023] In addition to one or more of the features disclosed above, or as an alternative, it also includes: an electrically controlled valve, which is arranged at the connection between the return pipe and the second outlet of the shell, and the electrically controlled valve is electrically or wirelessly connected to the controller, and the electrically controlled valve is used to control the opening or closing of the return pipe.

[0024] In addition to or as an alternative to one or more of the features disclosed above, the invention further comprises: a second driver, a second transmission member and a cover plate;

[0025] The second driver is arranged on the outer wall of the shell, and the second driver is electrically or wirelessly connected to the controller, the cover plate is movably connected to the first inlet of the heat exchange shell, and the cover plate covers part of the first inlet, the second transmission member is passed through the shell, part of the second transmission member is arranged in the accommodating cavity and is transmission-connected to the cover plate, and the other part of the second transmission member is located outside the shell and is transmission-connected to the power output end of the first driver;

[0026] The second driver is used to drive the cover plate to move so as to adjust the opening degree of the first inlet.

[0027] One of the above technical solutions has the following advantages or beneficial effects: the present application sets a movable partition plate in the outer shell to form a first sub-chamber for storing a first fluid that does not participate in heat exchange, and drives the partition plate to move through a first driver to control the mixing of the first fluid that does not participate in heat exchange and the first fluid that completes heat exchange in the first sub-chamber. At the same time, the first driver controls the opening degree of the partition plate to control the mixing ratio between the first fluid that does not participate in heat exchange and the first fluid that completes heat exchange, so as to adjust the temperature of the first fluid at the outlet of the outer shell in real time, thereby ensuring the constancy of the temperature of the first fluid at the outlet of the outer shell, which is conducive to the smooth achievement of the outlet temperature standard and ensuring the subsequent normal use of the first fluid; at the same time, the present application has a high degree of automation and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0029] Figure 1 is a schematic structural diagram of a plate heat exchanger provided according to an embodiment of the present application;

[0030] Figure 2 is a cross-sectional view of a plate heat exchanger along the AA direction provided in an embodiment of the present application;

[0031] Figure 3 is a structural schematic diagram of a plate heat exchanger provided according to another embodiment of the present application;

[0032] Figure 4It is a cross-sectional view of a plate heat exchanger along the BB direction provided according to another embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100. Plate heat exchanger;

[0035] 110, housing; 111, accommodating chamber; 1111, first sub-chamber; 1112, second sub-chamber; 112, second inlet; 113, second outlet;

[0036] 120, heat exchange unit; 121, heat exchange shell; 1211, first heat exchange channel; 1212, first inlet; 1213, first outlet; 122, heat exchange element; 1221, third inlet; 1222, third outlet;

[0037] 130, partition plate; 131, partition body; 1311, through hole; 132, valve plate portion;

[0038] 140, first driver;

[0039] 150, a first transmission member;

[0040] 160. Seals;

[0041] 171, second driver; 172, second transmission member; 173, cover plate;

[0042] 181. reflux pipe; 182. reflux driver; 183. cooling element; 184. electric control valve;

[0043] 190. Temperature sensor. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and beneficial effects of this application more clear, the following further describes this application in detail in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining this application, not for limiting this application.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the embodiments of the present application, refer to Figures 1 to 4 The present application provides a plate heat exchanger 100 , which has a first direction Z. Exemplarily, the first direction Z is the height direction of the plate heat exchanger 100 .

[0049] Specifically, the plate heat exchanger 100 includes: a shell 110 , a heat exchange unit 120 , a partition plate 130 and a first driver 140 .

[0050] Specifically, the shell 110 is provided with a accommodating cavity 111; the heat exchange unit 120 includes: a heat exchange shell 121 and a heat exchange element 122, the heat exchange shell 121 is arranged in the accommodating cavity 111, and a first heat exchange channel 1211 extending along the first direction Z is arranged in the heat exchange shell 121, the heat exchange element 122 is arranged in the first heat exchange channel 1211, the first heat exchange channel 1211 is configured to circulate a first fluid to be cooled, and the heat exchange element 122 is configured to circulate a second fluid to be heated; at least part of the partition plate 130 can be movably connected to the accommodating cavity 111 of the shell 110, that is, part of the partition plate 130 in the present application can be fixedly connected to the shell 110, and another part of the partition plate 130 can be movably connected to the shell 110; or, the partition plate 130 in the present application is movably connected to the shell 110. The partition plate 130 divides the accommodating chamber 111 into a first sub-chamber 1111 and a second sub-chamber 1112, and the second sub-chamber 1112 is connected to the first heat exchange channel 1211, and the first sub-chamber 1111 is used to store the first fluid that does not participate in the heat exchange; the first driver 140 is connected to the outer shell 110, and the power output end of the first driver 140 is transmission-connected to the partition plate 130, and the first driver 140 is configured to control the opening degree of the partition plate 130 to connect the first sub-chamber 1111 and the second sub-chamber 1112, so as to control the mixing of the first fluid that has completed heat exchange in the first heat exchange channel 1211 and the first fluid that has not participated in heat exchange in the first sub-chamber 1111.

[0051] The heat exchange element 122 may be made of heat-conducting metal. For example, in the present application, the heat exchange element 122 may be made of aluminum or copper, but is not limited thereto.

[0052] The first driver 140 may be a driving motor or a driving cylinder, but is not limited thereto.

[0053] The first fluid and the second fluid may be any fluid and are not specifically limited in this application.

[0054] The heat exchange shell 121 is provided with a first inlet 1212 and a first outlet 1213 on both sides in the first direction Z, respectively. The first inlet 1212 and the first outlet 1213 are both connected to the first heat exchange channel 1211 .

[0055] The housing 110 is provided with a second inlet 112 and a second outlet 113 . The second inlet 112 is disposed close to the first inlet 1212 . The second inlet 112 is communicated with the first inlet 1212 and the first sub-cavity 1111 , respectively. The second outlet 113 is communicated with the first outlet 1213 and the second sub-cavity 1112 , respectively.

[0056] The heat exchange element 122 has a third inlet 1221 and a third outlet 1222 , and both the third inlet 1221 and the third outlet 1222 are in communication with the inner space of the heat exchange element 122 .

[0057] It is understandable that, usually, the existing heat exchanger has a better heat exchange effect in the initial operation, so that the outlet temperature of the first fluid greatly exceeds the set temperature value. Although the heat exchange effect is better, it is disadvantageous for some processes that have strict control over the outlet temperature of the first fluid.

[0058] Therefore, in the present application, when the plate heat exchanger 100 starts to work, the uncooled first fluid flows from the second inlet 112 of the shell 110 to the accommodating chamber 111, part of the uncooled first fluid flows from the first inlet 1212 of the first heat exchange channel 1211 to the first heat exchange channel 1211, and another part of the uncooled first fluid is stored in the first sub-chamber 1111. At the same time, the second fluid flows from the third inlet 1221 to the heat exchange element 122, and the first fluid in the first heat exchange channel 1211 exchanges heat with the second fluid in the heat exchange element 122. After the heat exchange is completed, the second fluid flows out of the heat exchange element 122. The third outlet 1222 is discharged, and at the same time, the first fluid that has completed heat exchange in the first heat exchange channel 1211 flows to the first outlet 1213, and then flows to the second outlet 113. Since the heat exchange effect of the plate heat exchanger 100 is better during the initial operation, the outlet temperature of the first fluid greatly exceeds the set temperature value. The first driver 140 controls the partition plate 130 to be fully opened, and the first fluid that does not participate in the heat exchange in the first sub-chamber 1111 flows to the second sub-chamber 1112 and the second outlet 113 to mix with the first fluid that has completed heat exchange, so that the temperature of the first fluid at the second outlet 113 is maintained at the temperature required by the process.

[0059] At the same time, as the plate heat exchanger 100 runs longer, the heat exchange effect becomes worse, and the first driver 140 controls the opening degree of the partition plate 130 to adjust the flow rate of the first fluid that does not participate in the heat exchange to ensure that the temperature of the two first fluids after mixing is always maintained at the temperature required by the process.

[0060] The present application sets a movable partition plate 130 in the shell 110 to form a first sub-chamber 1111 for storing the first fluid that does not participate in the heat exchange, and drives the partition plate 130 to move through the first driver 140 to control the mixing of the first fluid that does not participate in the heat exchange in the first sub-chamber 1111 and the first fluid that completes the heat exchange. At the same time, the first driver 140 controls the opening degree of the partition plate 130 to control the mixing ratio between the first fluid that does not participate in the heat exchange and the first fluid that completes the heat exchange, so as to adjust the temperature of the first fluid at the outlet of the shell 110 in real time, ensure the constancy of the temperature of the first fluid at the outlet of the shell 110, facilitate the smooth achievement of the outlet temperature standard, and ensure the subsequent normal use of the first fluid; at the same time, the present application has a high degree of automation and is energy-saving and environmentally friendly.

[0061] In one embodiment, referring to Figure 1 to Figure 2 The plate heat exchanger 100 also includes: a temperature sensor 190 and a controller (not shown in the figure), the temperature sensor 190 is arranged at the second outlet 113, and the temperature sensor 190 is used to sense the temperature of the first fluid at the second outlet 113; the controller is arranged on the outside of the shell 110, and the controller is electrically or wirelessly connected to the temperature sensor 190 and the first driver 140 respectively.

[0062] Among them, the controller can be a conventional product or a conventional control chip or other conventional products that can realize the control function in this application, and there is no specific limitation in this application.

[0063] It can be understood that when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is lower than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to drive the partition plate 130 to move, so as to adjust the opening degree of the partition plate 130, control the flow rate of the first fluid that does not participate in the heat exchange and the first flow that completes the heat exchange, so as to adjust the temperature of the first fluid at the second outlet 113 of the shell 110 in real time, so as to ensure that the temperature of the mixed first fluid at the second outlet 113 is at the set value, ensure the constancy of the temperature of the first fluid at the outlet of the shell 110, which is conducive to the smooth achievement of the outlet temperature standard and ensure the subsequent normal use of the first fluid.

[0064] In one embodiment, referring to Figure 1 to Figure 2 The partition plate 130 includes: a partition body 131 and a valve plate portion 132. The partition body 131 is connected to the accommodating chamber 111 of the shell 110 to separate the accommodating chamber 111 into a first sub-chamber 1111 and a second sub-chamber 1112, and a through hole 1311 is opened on the partition body 131; the valve plate portion 132 is movably connected to the through hole 1311 of the partition body 131, and the power output end of the first driver 140 is transmission-connected to the valve plate portion 132. The first driver 140 is configured to drive the valve plate portion 132 to move so as to adjust the opening degree of the through hole 1311.

[0065] The partition body 131 and the housing 110 may be integrally formed, and the partition body 131 and the housing 110 may be fixedly connected, and illustratively, the partition body 131 and the housing 110 are fixedly welded. This is not specifically limited in the present application, and may be selected according to actual circumstances.

[0066] The through hole 1311 may be in any shape. For example, in the present application, the through hole 1311 is a rectangle, but is not limited thereto.

[0067] Among them, the first driver 140 can drive the valve plate portion 132 to rotate to adjust the opening degree of the through hole 1311; the first driver 140 can also drive the valve plate portion 132 to slide along a direction to adjust the opening degree of the through hole 1311. This is not specifically limited in this application and can be specifically set according to actual circumstances.

[0068] It can be understood that when the plate heat exchanger 100 just starts to work, the uncooled first fluid flows from the second inlet 112 of the shell 110 to the accommodating chamber 111, part of the uncooled first fluid flows from the first inlet 1212 of the first heat exchange channel 1211 to the first heat exchange channel 1211, and another part of the uncooled first fluid is stored in the first sub-chamber 1111. At the same time, the second fluid flows from the third inlet 1221 to the heat exchange element 122, and the first fluid in the first heat exchange channel 1211 exchanges heat with the second fluid in the heat exchange element 122. The second fluid after the heat exchange is completed is discharged from the third outlet 1222. At the same time, the first fluid that has completed the heat exchange in the first heat exchange channel 1211 flows to the first outlet 1213. When flowing to the second outlet 113, since the heat exchange effect of the plate heat exchanger 100 is better during the initial operation, the outlet temperature of the first fluid greatly exceeds the set temperature value. When the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is lower than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result. The first driver 140 controls the valve plate portion 132 to be fully opened, and the first fluid that does not participate in the heat exchange in the first sub-chamber 1111 flows to the second sub-chamber 1112 and the second outlet 113 to mix with the first fluid that has completed the heat exchange, so that the temperature of the first fluid at the second outlet 113 is maintained at the temperature required by the process.

[0069] At the same time, as the plate heat exchanger 100 runs longer, the heat exchange effect becomes worse, and the controller sends a control instruction to the first driver 140 to control the first driver 140 to adjust the opening degree of the valve plate part 132 to adjust the flow rate of the first fluid that does not participate in the heat exchange, ensuring that the temperature of the two first fluids after mixing is always maintained at the temperature required by the process.

[0070] Specifically, when the temperature of the first fluid at the second inlet 112 is higher than the set temperature, the temperature of the first fluid at the second outlet 113 will increase accordingly. If the temperature of the first fluid at the second outlet 113 exceeds the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is higher than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to reduce the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually increases, and the proportion of the first fluid that does not participate in the heat exchange gradually decreases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0071] When the flow rate of the first fluid at the second inlet 112 is higher than the set flow rate, the temperature of the first fluid at the second outlet 113 will increase accordingly. If the temperature of the first fluid at the second outlet 113 exceeds the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is higher than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to reduce the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually increases, and the proportion of the first fluid that does not participate in the heat exchange gradually decreases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0072] When the temperature and flow rate of the first fluid at the second inlet 112 are higher than the set value, the temperature of the first fluid at the second outlet 113 will increase accordingly. If the temperature of the first fluid at the second outlet 113 exceeds the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is higher than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to reduce the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually increases, and the proportion of the first fluid that does not participate in the heat exchange gradually decreases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0073] When the temperature and flow rate of the first fluid at the second inlet 112 are lower than the set value, the temperature of the first fluid at the second outlet 113 will decrease accordingly. If the temperature of the first fluid at the second outlet 113 is lower than the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is lower than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to increase the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually decreases, and the proportion of the first fluid that does not participate in the heat exchange gradually increases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0074] The temperature of the first fluid at the second inlet 112 is higher than the set value, and the flow rate is lower than the set value, or the temperature is lower than the set value, and the flow rate is higher than the set value. If the temperature of the first fluid at the second outlet 113 exceeds the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is higher than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to reduce the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually increases, and the proportion of the first fluid that does not participate in the heat exchange gradually decreases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0075] When the inlet temperature of the second fluid at the third inlet 1221 is higher than the set value, the temperature of the first fluid at the second outlet 113 will decrease accordingly. If the temperature of the first fluid at the second outlet 113 is lower than the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is lower than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to increase the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually decreases, and the proportion of the first fluid that does not participate in the heat exchange gradually increases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0076] When the flow rate of the second fluid at the third inlet 1221 is higher than the set value, the temperature of the first fluid at the second outlet 113 will decrease accordingly. If the temperature of the first fluid at the second outlet 113 is lower than the set temperature, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is lower than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to increase the opening degree of the valve plate portion 132, so that the proportion of the first fluid that completes the heat exchange during mixing gradually decreases, and the proportion of the first fluid that does not participate in the heat exchange gradually increases, until the outlet temperature after the two first fluids are mixed reaches the set value, and the first driver 140 stops operating.

[0077] In summary, in the present application, no matter how the working conditions of the first fluid and the second fluid change, the first driver can always perform corresponding actions when the temperature of the first fluid at the second outlet 113 is not at the set value, so that the temperature of the first fluid at the second outlet 113 is always controlled within the set temperature range to meet the requirements of subsequent production processes.

[0078] In one embodiment, referring to Figure 1 to Figure 2 The first driver 140 is connected to the outer wall of the housing 110 to ensure the normal operation of the first driver 140 .

[0079] The plate heat exchanger 100 also includes: a first transmission member 150, the first transmission member 150 is passed through the outer shell 110, part of the first transmission member 150 is arranged in the accommodating cavity 111 and is transmission-connected to the valve plate portion 132, and another part of the first transmission member 150 is located on the outside of the outer shell 110 and is transmission-connected to the power output end of the first driver 140, so that the first driver 140 can drive the valve plate portion 132 to move, thereby improving the driving efficiency of the first driver 140.

[0080] In another embodiment, the power output end of the first driver 140 may also be directly connected to the valve plate portion 132 in a transmission manner to save components and reduce costs.

[0081] In one embodiment, referring to Figure 1 to Figure 2 The plate heat exchanger 100 further includes: a seal 160 , which is disposed at the connection between the first transmission member 150 and the housing 110 to ensure the overall sealing of the plate heat exchanger 100 and ensure the normal use of the plate heat exchanger 100 .

[0082] The sealing member 160 may be a sealing ring, but is not limited thereto.

[0083] In one embodiment, the partition plate 130 is arranged away from the second inlet 112 relative to the first inlet 1212, and the distance between the partition plate 130 and the first inlet 1212 is H mm, which satisfies: 300≤H≤500. That is, the distance H mm between the partition plate 130 and the first inlet 1212 can be controlled within the range of 300mm to 500mm. Exemplarily, the distance H mm between the partition plate 130 and the first inlet 1212 can be 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm, 390mm, 400mm, 420mm, 440mm, 460mm, 480mm or 500mm. The above specific values ​​of H mm are only given by way of example, and any value within the range of 300mm to 500mm is within the protection scope of the present application.

[0084] The present application controls the distance H mm between the partition plate 130 and the first inlet 1212 within the range of 300 mm to 500 mm, so as to form a first sub-chamber 1111 of sufficient volume in the plate heat exchanger 100, thereby ensuring that the first sub-chamber 1111 can store sufficient uncooled first fluid, thereby ensuring that there is sufficient uncooled first fluid to mix with the first fluid that has completed heat exchange, further ensuring that the temperature of the mixed first fluid at the second outlet 113 is at a set value, ensuring the constancy of the temperature of the first fluid at the outlet of the shell 110, which is conducive to the smooth achievement of the outlet temperature standard and ensuring the subsequent normal use of the first fluid.

[0085] The distance H mm between the partition plate 130 and the first inlet 1212 can be obtained by disassembling the plate heat exchanger 100, measuring the distance between the partition plate 130 and the first inlet 1212 multiple times with a measuring tool, and calculating the average value. The measuring tool can be a ruler or a vernier caliper, but is not limited thereto.

[0086] In one embodiment, referring to Figure 3 to Figure 4 The plate heat exchanger 100 further includes: a return pipe 181 , a return driver 182 , a cooling element 183 and an electric control valve 184 .

[0087] Specifically, one end of the return pipe 181 is connected to the second outlet 113, and the other end of the return pipe 181 is connected to the first inlet 1212, and the return pipe 181 is used to return the first fluid at the second outlet 113; the return driver 182 is arranged on the return pipe 181, and the return driver 182 is electrically or wirelessly connected to the controller; the cooling element 183 surrounds the outer surface of the return pipe 181, and the cooling element 183 is used to cool the first fluid in the return pipe 181; the electric-controlled valve 184 is arranged at the connection between the return pipe 181 and the second outlet 113 of the outer shell 110, and the electric-controlled valve 184 is electrically or wirelessly connected to the controller, and the electric-controlled valve 184 is used to control the opening or closing of the return pipe 181.

[0088] The reflux driver 182 may be a reflux pump, but is not limited thereto.

[0089] The cooling element 183 may be a cooling pipe with a coolant flowing therein, but is not limited thereto.

[0090] The electrically controlled valve 184 may be any valve, but is not limited thereto.

[0091] It can be understood that when the plate heat exchanger 100 works normally, the reflux driver 182 is started and the electric control valve 184 is in a closed state.

[0092] When the temperature of the first fluid at the second outlet 113 is always higher than the set value, when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is higher than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the first driver 140 according to the feedback result to control the first driver 140 to close the valve plate portion 132. At the same time, the controller sends a control instruction to the reflux driver 182 and the electric control valve 184 to control the reflux driver 182 to start and the electric control valve 184 to open. The first fluid at the second outlet 113 flows into the reflux pipe 181, and the cooling element 183 cools the first fluid in the reflux pipe 181. After the cooling is completed, the first fluid in the reflux pipe 181 is transported to the first inlet 1212 for reflux, so as to mix with the first fluid at the first inlet 1212 and continue to flow, thereby reducing the temperature of the first fluid in the first heat exchange channel 1211, so that the temperature of the first fluid at the second outlet 113 is always controlled within the set temperature range to meet the requirements of subsequent production processes.

[0093] The present application sets a reflux pipe 181, a reflux driver 182, and a cooling element 183 to reflux and cool the first fluid at the second outlet 113, so as to further adjust the temperature of the first fluid at the outlet of the shell 110 in real time, thereby ensuring the constancy of the temperature of the first fluid at the outlet of the shell 110, which is conducive to the smooth achievement of the outlet temperature standard and ensures the subsequent normal use of the first fluid; at the same time, the present application has a high degree of automation and is energy-saving and environmentally friendly.

[0094] In one embodiment, referring to Figure 3 to Figure 4 The plate heat exchanger 100 further includes: a second driver 171 , a second transmission member 172 and a cover plate 173 .

[0095] The second driver 171 is arranged on the outer wall of the shell 110 to ensure the normal use of the second driver 171, and the second driver 171 is electrically or wirelessly connected to the controller, the cover plate 173 is movably connected to the first inlet 1212 of the heat exchange shell 121, and the cover plate 173 covers part of the first inlet 1212, the second transmission member 172 is penetrated by the shell 110, part of the second transmission member 172 is arranged in the accommodating cavity 111 and is transmission-connected to the cover plate 173, and the other part of the second transmission member 172 is located on the outside of the shell 110 and is transmission-connected to the power output end of the first driver 140; the second driver 171 is used to drive the cover plate 173 to move to adjust the opening degree of the first inlet 1212.

[0096] The second driver 171 may be a driving motor or a driving cylinder, but is not limited thereto.

[0097] It can be understood that when the temperature sensor 190 senses that the temperature of the first fluid at the second outlet 113 is higher than the set value, the temperature sensor 190 sends a feedback signal to the controller. After receiving the feedback signal, the controller sends a control instruction to the second driver 171 according to the feedback result to control the second driver 171 to reduce the opening degree of the first inlet 1212, thereby reducing the flow rate of the first fluid in the first heat exchange channel 1211, so that the first fluid in the first heat exchange channel 1211 and the second fluid in the heat exchange element 122 can fully exchange heat, reduce the temperature of the first fluid in the first heat exchange channel 1211 after the heat exchange is completed, and make the temperature of the mixed first fluid at the second outlet 113 always controlled within the set temperature range to meet the requirements of subsequent production processes.

[0098] The present application adjusts the opening degree of the first inlet 1212 by setting the second driver 171 to adjust the flow rate of the first fluid in the first heat exchange channel 1211, thereby adjusting the temperature of the first fluid in the first heat exchange channel 1211 after the heat exchange is completed, so as to further adjust the temperature of the first fluid at the outlet of the shell 110 in real time, thereby ensuring the constancy of the temperature of the first fluid at the outlet of the shell 110, which is conducive to the smooth achievement of the outlet temperature standard and ensuring the subsequent normal use of the first fluid; at the same time, the present application has a high degree of automation and is energy-saving and environmentally friendly.

[0099] The introduction provided in the above steps is only used to help understand the method, structure and core idea of ​​the present application. For ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A plate heat exchanger having a first direction, characterized in that: include: A housing is provided with a receiving cavity; A heat exchange unit, the heat exchange unit comprising: a heat exchange shell and a heat exchange element, the heat exchange shell is arranged in the accommodating cavity, and a first heat exchange channel extending along a first direction is arranged in the heat exchange shell, the heat exchange element is arranged in the first heat exchange channel, the first heat exchange channel is configured to flow a first fluid to be cooled, and the heat exchange element is configured to flow a second fluid to be heated; a partition plate, at least a portion of which is movably connected to the accommodating chamber of the housing to divide the accommodating chamber into a first sub-chamber and a second sub-chamber, wherein the second sub-chamber is communicated with the first heat exchange flow channel, and the first sub-chamber is used to store a first fluid that does not participate in heat exchange; and A first driver is connected to the housing, and a power output end of the first driver is transmission-connected to the partition plate. The first driver is configured to control the opening degree of the partition plate to connect the first sub-chamber and the second sub-chamber to control the mixing of the first fluid that has completed heat exchange in the first heat exchange channel and the first fluid that has not participated in heat exchange in the first sub-chamber.

2. The plate heat exchanger according to claim 1, characterized in that: The partition plate comprises: a partition body connected to the accommodating cavity of the shell to divide the accommodating cavity into a first sub-cavity and a second sub-cavity, and a through hole is opened on the partition body; and The valve plate portion is movably connected to the through hole of the partition body, the power output end of the first driver is transmission-connected to the valve plate portion, and the first driver is configured to drive the valve plate portion to move so as to adjust the opening degree of the through hole.

3. The plate heat exchanger according to claim 2, characterized in that: The first driver is connected to the outer wall of the housing; The plate heat exchanger also includes: a first transmission member, which is inserted into the outer shell, a portion of which is disposed in the accommodating cavity and is transmission-connected to the valve plate portion, and another portion of which is located outside the outer shell and is transmission-connected to the power output end of the first driver.

4. The plate heat exchanger according to claim 3, characterized in that: Also includes: A sealing member is arranged at the connection between the first transmission member and the housing.

5. The plate heat exchanger according to any one of claims 1 to 4, characterized in that: The heat exchange housing is provided with a first inlet and a first outlet on both sides in the first direction, and the first inlet and the first outlet are both connected to the first heat exchange channel; The shell is provided with a second inlet and a second outlet, the second inlet is arranged close to the first inlet, the second inlet is communicated with the first inlet and the first sub-cavity respectively, and the second outlet is communicated with the first outlet and the second sub-cavity respectively.

6. The plate heat exchanger according to claim 5, characterized in that: The partition plate is arranged relative to the first inlet and away from the second inlet, and the distance between the partition plate and the first inlet is H mm, satisfying: 300≤H≤500.

7. The plate heat exchanger according to claim 5, characterized in that: Also includes: A temperature sensor and a controller, wherein the temperature sensor is disposed at the second outlet and is used to sense the temperature of the first fluid at the second outlet; The controller is electrically or wirelessly connected to the temperature sensor and the first driver respectively.

8. The plate heat exchanger according to claim 7, characterized in that: Also includes: a reflux pipe, one end of which is connected to the second outlet, the other end of which is connected to the first inlet, and the reflux pipe is used to reflux the first fluid at the second outlet; A reflux driver, disposed on the reflux pipe, the reflux driver being electrically or wirelessly connected to the controller; as well as A cooling element surrounds the outer surface of the return pipe, and the cooling element is used to cool the first fluid in the return pipe.

9. The plate heat exchanger according to claim 8, characterized in that: Also includes: An electrically controlled valve is disposed at the connection between the reflux pipe and the second outlet of the housing, and the electrically controlled valve is electrically or wirelessly connected to the controller, and is used to control the opening or closing of the reflux pipe.

10. The plate heat exchanger according to claim 7, characterized in that: Also includes: A second driver, a second transmission member and a cover plate; The second driver is arranged on the outer wall of the shell, and the second driver is electrically or wirelessly connected to the controller, the cover plate is movably connected to the first inlet of the heat exchange shell, and the cover plate covers part of the first inlet, the second transmission member is passed through the shell, part of the second transmission member is arranged in the accommodating cavity and is transmission-connected to the cover plate, and the other part of the second transmission member is located outside the shell and is transmission-connected to the power output end of the first driver; The second driver is used to drive the covering plate to move so as to adjust the opening degree of the first inlet.

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