Modular electric heating unit

Abstract

This disclosure proposes a modular electric heating unit. A primary heating module includes a primary heating frame, electric heating units, and a primary pump station. A secondary heating module includes a secondary heating frame, heat exchange units, and a secondary pump station. The primary heating frame is arranged side-by-side on one side of the secondary heating frame. A secondary heating inlet and outlet interface are provided between the heat exchange units and the secondary pump station. The primary heating frame is provided with a primary heating outlet and a primary heating inlet interface. When expansion is needed, new secondary heating modules are added side-by-side with existing secondary heating modules. The secondary heating inlets of two adjacent secondary heating modules are detachably connected via a first transition pipe, and the secondary heating outlet interfaces of two adjacent secondary heating modules are detachably connected via a second transition pipe. Each heat exchange unit is also connected to an outlet heating pipe and a return heating pipe. This modular electric heating unit improves the modularity and expandability of electric heating units.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, specifically a modular electric heating unit. Background Technology

[0002] The heating unit, as a key component of the heating system, is quite large. It is typically assembled on-site, and expansion is difficult. However, a modular nuclear heating energy-saving device, disclosed in authorization announcement number CN115507416B, has been proposed. This modular nuclear heating energy-saving device includes a pipe and valve integration module, a heating network heater module, a condensate system module, a circulating pump module, an energy power module, a control module, a water supply and pressure stabilization module, a free space module, a space and ventilation module, an equipment foundation module, a first pipe penetration assembly, a cable penetration assembly, a fresh air filter assembly, a lighting assembly, a structural enclosure assembly, and a second pipe penetration assembly. The equipment foundation module is located at the bottom layer of the device, and the circulating pump module is adjacent to the water supply and pressure stabilization module and the fresh air filter assembly. The energy and power module and the equipment foundation module are adjacent to each other. The energy and power module is also adjacent to the condensate system module. The circulating pump group module is equipped with a pipe and valve integration module, a first pipe penetration assembly and a cable penetration assembly on its upper part. The first pipe penetration assembly is adjacent to the pipe and valve integration module and the cable penetration assembly. The energy and power module is equipped with a control module on its upper part. The condensate system module is equipped with a second pipe penetration assembly on its upper part. The heating network heater module is equipped with the second pipe penetration assembly. The pipe and valve integration module, the first pipe penetration assembly and the cable penetration assembly are equipped with a free space module. The control module is adjacent to the free space module and the heating network heater module. A lighting assembly is installed in the middle of the top of the device. The top of the device is equipped with structural enclosure assemblies around its perimeter. The top of the device is also equipped with a space and ventilation module.

[0003] However, this modular nuclear heating energy-saving device is suitable for nuclear heating systems but not for electric heating units, and its expansion remains unchanged. Therefore, this application proposes a modular electric heating unit, which is beneficial to improving the modularity and expansion performance of electric heating units. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and propose a modular electric heating unit, which is conducive to improving the modularity and expandability of the electric heating unit.

[0005] Compared with the prior art, this utility model proposes a modular electric heating unit, including a primary electric heating module and a secondary heating module. The primary electric heating module includes a primary frame, an electric heating unit, and a primary pump station. The secondary heating module includes a secondary frame, a heat exchange unit, and a secondary pump station. The electric heating unit and the primary pump station are installed in the primary frame, and the heat exchange unit and the secondary pump station are installed in the secondary frame. The primary frame is located on one side of the secondary frame and arranged side by side. Furthermore, a secondary heat exchange inlet and outlet water interface are provided between the heat exchange unit and the secondary pump station, facing the primary frame. The primary frame is provided with a primary heat exchange outlet and a primary heat exchange inlet water interface, facing the secondary frame, connected to the primary pump station. The primary heat exchange outlet and the secondary heat exchange inlet water interface are detachably connected.

[0006] When expansion is required, a new secondary heating module is added in parallel with the existing secondary heating module. The new secondary heating module also has a corresponding secondary heating inlet and outlet interface. The new secondary heating inlet interface is detachably connected to the existing adjacent secondary heating inlet interface through a first transition pipe, and the new secondary heating outlet interface is detachably connected to the existing adjacent secondary heating outlet interface through a second transition pipe.

[0007] Each heat exchange unit is also connected to an outlet heating pipe and a return heating pipe. The return heating pipe is also connected to the outlet of the secondary network pumping station. The inlet of the secondary network pumping station is connected to the return end of the user-side heat exchanger through a pipeline. The outlet of the outlet heating pipe is used to connect to the inlet of the user-side heat exchanger through a pipeline.

[0008] Compared with the prior art, the present invention has the following advantages after adopting the above structure: This disclosure achieves two scenarios through improvements: The first scenario involves only one secondary heating module. Through modular design, the electric heating unit is divided into a primary heating module and a secondary heating module to better achieve modularity, which improves the modular performance of the electric heating unit. The primary heating module can also be called the first electric heating circuit, which contains a first medium driven by a primary pump station. The secondary heating module can also be called the second heating circuit, which contains a second medium driven by a secondary pump station. The heat exchange units are connected to the first and second media to achieve heat exchange, thereby using the first medium to heat the second medium. The heated second medium is then delivered to the user-side heat exchanger to provide heating to the user.

[0009] The second scenario is an expansion scenario, which demonstrates how to further expand and add a secondary heating module based on the first scenario, thus improving the expansion performance of the electric heating unit.

[0010] In some embodiments, the grid frame is divided into two parts along its length, namely a first part and a second part. The first part is equipped with an electric heating unit as a first module, and the first module is provided with a first inlet and outlet pipe connected to the inlet and outlet of the electric heating unit. The second part is equipped with a grid pump station as a second module, and the second module is provided with a second inlet and outlet pipe. The inlet part of the second inlet and outlet pipe is divided into two parts at both ends of the grid pump station. One part is used to connect to the inlet end of the first inlet and outlet pipe, and the other part provides the grid heat exchange water inlet interface. One end of the outlet part of the second inlet and outlet pipe is used to connect to the outlet end of the first inlet and outlet pipe, and the other end of the outlet part of the second inlet and outlet pipe provides the grid heat exchange water outlet interface.

[0011] The electric heating module consists of a first module and a second module that are detachably connected along the length of the electric heating frame.

[0012] In some embodiments, the secondary heat exchanger frame is divided into two parts along its length, namely a third part and a fourth part. The third part is equipped with heat exchange units as a third module. The third module is provided with a third inlet / outlet pipe connected to the first inlet / outlet of the heat exchange unit, an outlet heating pipe and a return heating pipe connected to the second inlet / outlet of the heat exchange unit. The inlet part of the third inlet / outlet pipe provides the secondary heat exchanger inlet interface, and the outlet part of the third inlet / outlet pipe provides the secondary heat exchanger outlet interface.

[0013] The fourth part is the installation of the secondary network pumping station as the fourth module. The fourth module is equipped with a fourth inlet and outlet pipe. The inlet part of the fourth inlet and outlet pipe is connected to both ends of the secondary network pumping station and is divided into two parts. One part is used to connect to the return water heating pipe, and the other part provides the inlet end of the secondary network pumping station. The outlet part of the fourth inlet and outlet pipe is used to connect to the outlet water heating pipe, and the outlet part of the fourth inlet and outlet pipe provides the outlet end of the outlet water heating pipe.

[0014] The secondary heating module is composed of a third module and a fourth module that are detachably connected along the length of the secondary heating frame.

[0015] In some embodiments, a water replenishment module is also included, and the third module, the fourth module, and the water replenishment module are sequentially and detachably connected along the length of the secondary grid frame to form a secondary heating module.

[0016] In some embodiments, the water replenishment module includes a support frame, a water tank, a water replenishment pump, and a water replenishment pipe. The water replenishment pipe is connected to the water tank via the water replenishment pump. When the fourth module and the water replenishment module are connected, the water replenishment pipe is connected to the inlet section of the fourth inlet / outlet pipe via a pipeline.

[0017] In some embodiments, the electric heating unit employs a plate heat exchanger, which includes plate-shaped heat exchange plates, a first fixed template, a second fixed template, and a plate-shaped heating element. Multiple plate-shaped heat exchange plates are sandwiched between the first and second fixed templates, and the plate-shaped heating element is sandwiched between two adjacent plate-shaped heat exchange plates. One side of the plate-shaped heating element is in contact with the adjacent plate-shaped heat exchange plate, and the other side of the plate-shaped heating element is in contact with the adjacent plate-shaped heat exchange plate. The plate-shaped heating element heats two adjacent plate-shaped heat exchange plates simultaneously.

[0018] In some embodiments, the plate heat exchange plate includes a plate-shaped flow channel plate and a first plate-shaped cover plate. The plate-shaped flow channel plate has a first flow channel on its front side. The first plate-shaped cover plate is stacked and connected to the front side of the plate-shaped flow channel plate so that the first plate-shaped cover plate covers the first flow channel to form a first flow channel. The plate-shaped heating element located on the front side of the plate-shaped flow channel plate is attached to the outer side of the first plate-shaped cover plate and covers the area of ​​the outer side corresponding to the first flow channel.

[0019] In some embodiments, the plate heat exchange plate further includes a second plate cover plate, and the plate flow channel plate is provided with a second flow channel on its rear side. The second plate cover plate and the rear side of the plate flow channel plate are stacked and connected so that the second plate cover plate covers the second flow channel to form a second flow channel. The plate heating element located on the rear side of the plate flow channel plate is attached to the outer side of the second plate cover plate and covers the area of ​​the outer side corresponding to the second flow channel.

[0020] In some embodiments, two adjacent plate heat exchange plates share a single plate cover.

[0021] In some embodiments, the first flow channel and the second flow channel are arranged alternately and sequentially, and adjacent first flow channels and second flow channels share adjacent sides.

[0022] In some embodiments, the plate-shaped flow channel plate has an inlet and an outlet for the first medium on its front and rear sides, respectively, at one end along its length. A first through hole is provided at the inlet, through which the first medium enters the first flow channel via the first through hole and the inlet on the front side. The first medium enters the second flow channel via the first through hole and the inlet on the rear side. A second through hole is provided at the outlet, through which the first medium flows out of the first flow channel via the outlet on the front side and the second through hole. The first medium flows out of the second flow channel via the outlet on the rear side and the second through hole. When the first fixed template, multiple plate-shaped heat exchange plates, and the second fixed template are sequentially stacked and connected, the first through hole and the second through hole penetrate each plate-shaped heat exchange plate and the first fixed template and / or the second fixed template along the thickness direction of the plate heat exchanger.

[0023] In some embodiments, the plate heat exchange plate, the plate heating element, the first fixing template and the second fixing template are all arranged vertically to form a vertical plate heat exchanger, and the plate heat exchanger also includes a base connected to the lower end of the plate heat exchanger. The base is used to vertically install the plate heat exchanger, and the lower end of the plate heat exchanger is provided with the first through hole and the second through hole. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a modular electric heating unit disclosed herein.

[0025] Figure 2 This is a top view of a modular electric heating unit disclosed herein.

[0026] Figure 3 This is a top view of the first module of a modular electric heating unit disclosed herein.

[0027] Figure 4 This is a top view of the second module of a modular electric heating unit disclosed herein.

[0028] Figure 5 for Figure 3 and Figure 4 A three-dimensional schematic diagram showing the detachable connection that forms a mesh electric heating module.

[0029] Figure 6 This is a top view of the third module of a modular electric heating unit disclosed herein.

[0030] Figure 7 This is a top view of the fourth module of a modular electric heating unit disclosed herein.

[0031] Figure 8 This is a top view of a water supply module for a modular electric heating unit disclosed herein.

[0032] Figure 9 This is a three-dimensional schematic diagram of the front side of a plate heat exchanger disclosed herein.

[0033] Figure 10 This is a three-dimensional schematic diagram of the rear side of a plate heat exchanger disclosed herein.

[0034] Figure 11 This is a three-dimensional schematic diagram of the front side of a plate heat exchanger after the first fixed template has been removed.

[0035] Figure 12 for Figure 11 The first sheet cover is removed to reveal a three-dimensional view of the front side of the sheet-like flow channel plate.

[0036] Figure 13 for Figure 12Based on this, the front plate heat exchange plate is further removed to show a three-dimensional view of the front side of the plate heating element sandwiched therein.

[0037] Figure 14 This is a three-dimensional schematic diagram of the rear side of a plate heat exchange plate after it is attached to and connected to a plate heating element.

[0038] Figure 15 This is a three-dimensional schematic diagram of the front side of a plate heat exchange plate after it is attached to and connected to a plate heating element.

[0039] Figure 16 This is a three-dimensional schematic diagram of the front side of a sheet-like flow channel plate disclosed herein.

[0040] Figure 17 This is a three-dimensional schematic diagram of the rear side of a sheet-like flow channel plate disclosed herein.

[0041] Figure 18 This is a three-dimensional schematic diagram of the inner side of a first sheet-like cover plate disclosed herein.

[0042] Figure 19 This is a three-dimensional schematic diagram of a sealing ring disclosed herein.

[0043] Figure 20 This is a front view of the front side of a sheet-like flow channel plate disclosed herein.

[0044] Figure 21 This is a sectional view along axis AA.

[0045] Explanation of reference numerals in the attached drawings: 1-plate-shaped flow channel plate, 2-first plate-shaped cover plate, 3-first flow channel, 4-plate-shaped heating element, 5-second plate-shaped cover plate, 6-second flow channel, 7-side, 8-inlet, 9-outlet, 10-first through hole, 11-second through hole, 12-plate-shaped heat exchange plate, 13-first fixing template, 14-second fixing template, 15-base, 16-positioning groove, 17-bolt, 18-primary heating module, 19-secondary heating module, 20-primary frame, 21-electric heating unit, 22-primary pump station, 23-secondary frame, 24-heat exchange unit, 25-secondary network Pump station, 26-Second network heat exchange inlet, 27-Second network heat exchange outlet, 28-First network heat exchange outlet, 29-First network heat exchange inlet, 30-First transition pipe, 31-Second transition pipe, 32-Outlet heating pipe, 33-Return heating pipe, 34-First section, 35-Second section, 36-First inlet / outlet pipe, 37-Second inlet / outlet pipe, 38-Third section, 39-Fourth section, 40-Third inlet / outlet pipe, 41-Fourth inlet / outlet pipe, 42-Inlet end, 43-Outlet end, 44-Support frame, 45-Water tank, 46-Makeup pump, 47-Makeup pipe, 48-Makeup module. Detailed Implementation

[0046] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The embodiments described below are merely examples, and other obvious variations will arise for those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0047] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, the above terms should not be construed as a limitation of this utility model.

[0048] like Figures 1 to 21 As shown, this disclosure proposes a modular electric heating unit, which is provided with one primary electric heating module 18 and three secondary heating modules 19, which are arranged in parallel in sequence.

[0049] like Figure 3 , 4 As shown in Figure 5, the primary electric heating module 18 includes a primary grid frame 20, an electric heating unit 21, and a primary grid pump station 22, as follows: Figure 6 , 7 As shown, the secondary heating module 19 includes a secondary grid frame 23, a heat exchange unit 24, and a secondary grid pump station 25. Both the primary grid frame 20 and the secondary grid frame 23 are linear frames. The electric heating unit 21 and the primary grid pump station 22 are installed in the primary grid frame 20, and the heat exchange unit 24 and the secondary grid pump station 25 are installed in the secondary grid frame 23. The primary grid frame 20 is located on one side of the secondary grid frame 23 and arranged side by side. Furthermore, a connection is provided between the heat exchange unit 24 and the secondary grid pump station 25. The heat exchange unit 24 is connected to the secondary heat exchange inlet 26 and the secondary heat exchange outlet 27 facing the primary heat exchange frame 20. The primary heat exchange frame 20 is connected to the primary heat exchange outlet 28 and the primary heat exchange inlet 29 facing the secondary heat exchange frame 23 on the primary heat exchange station 22. The primary heat exchange outlet 28 and the secondary heat exchange inlet 26 are detachably connected, and the primary heat exchange inlet 29 and the secondary heat exchange outlet 27 are detachably connected.

[0050] When expansion is needed, a new secondary heating module 19 is added alongside the existing secondary heating module 19. This new secondary heating module 19 also has corresponding secondary heating inlet and outlet ports 26 and 27. The new secondary heating inlet port 26 is detachably connected to the existing adjacent secondary heating inlet port 26 via a first transition pipe 30, and the new secondary heating outlet port 27 is detachably connected to the existing adjacent secondary heating outlet port 27 via a second transition pipe 31. According to the aforementioned scheme, a second secondary heating module 19 can be added to the first secondary heating module 19, and a third secondary heating module 19 can be added to the second secondary heating module 19, thus obtaining... Figure 1 , 2 The modular electric heating unit shown has three secondary heating modules 19, demonstrating that expansion is very convenient.

[0051] like Figure 1 , 2 As shown in Figure 6, the first transition pipe 30 and the second transition pipe 31 are both T-shaped pipes with three-way connections. The first end of each T-shaped pipe is connected to the heat exchange unit 24. The second end of the T-shaped pipe of the first secondary heating module 19 is used to connect the primary heat exchange outlet 28 and the primary heat exchange inlet 29. The third end of the T-shaped pipe of the first secondary heating module 19 is used to connect the second end of the T-shaped pipe of the first secondary heating module 19. The third end of the T-shaped pipe of the second secondary heating module 19 is used to connect the second end of the T-shaped pipe of the third secondary heating module 19. The third end of the T-shaped pipe of the third secondary heating module 19 is closed. Alternatively, when further expanded to add a fourth secondary heating module 19, the third end of the T-shaped pipe of the third secondary heating module 19 is connected to the second end of the T-shaped pipe of the fourth secondary heating module 19. The third end of the T-shaped pipe of the fourth secondary heating module 19 is closed.

[0052] Each heat exchange unit 24 is also connected to an outlet heating pipe 32 and a return heating pipe 33. The return heating pipe 33 is also connected to the outlet end 43 of the secondary network pump station 25. The inlet end 42 of the secondary network pump station 25 is connected to the return end of the user-side heat exchanger through a pipeline. The outlet end 43 of the outlet heating pipe 32 is used to connect to the inlet end of the user-side heat exchanger through a pipeline.

[0053] In some embodiments, such as Figure 5As shown, the network frame 20 is divided into two parts along its length: a first part 34 and a second part 35. The first part 34 is equipped with an electric heating unit 21 as a first module. The first module is provided with a first inlet / outlet pipe 36 connected to the inlet and outlet of the electric heating unit 21. The second part 35 is equipped with a network pump station 22 as a second module. The second module is provided with a second inlet / outlet pipe 37. The inlet part of the second inlet / outlet pipe 37 is divided into two parts at both ends of the network pump station 22. One part is used to connect to the inlet end of the first inlet / outlet pipe 36, and the other part provides the network heat exchange water inlet interface 29. One end of the outlet part of the second inlet / outlet pipe 37 is used to connect to the outlet end of the first inlet / outlet pipe 36, and the other end of the outlet part of the second inlet / outlet pipe 37 provides the network heat exchange water outlet interface 28.

[0054] The electric heating module 18 is composed of a first module and a second module that are detachably connected along the length of the electric heating frame 20.

[0055] This paper proposes a modular technical solution to reduce the size of a single electric heating module 18, thereby better adapting it to factory manufacturing. Specifically, the first and second modules are manufactured in the factory, connected and tested there, and then the electric heating module 18 is separated into its first and second modules. These modules are then reconnected on-site to form the new electric heating module 18. This approach ensures production quality and manufacturing consistency while significantly simplifying on-site assembly and construction. Furthermore, both cost and construction time are well controlled.

[0056] In some embodiments, such as Figure 6 , 7 As shown, the second-network frame 23 is divided into two parts along its length, namely the third part 38 and the fourth part 39. The third part 38 is equipped with heat exchange unit 24 as the third module. The third module is provided with a third inlet and outlet pipe 40 connected to the first inlet and outlet of the heat exchange unit 24, an outlet heating pipe 32 connected to the second inlet and outlet of the heat exchange unit 24, and a return heating pipe 33. The inlet part of the third inlet and outlet pipe 40 provides the second-network heat exchange inlet interface 26, and the outlet part of the third inlet and outlet pipe 40 provides the second-network heat exchange outlet interface 27.

[0057] The fourth module 39 installs the secondary network pump station 25 as the fourth module. The fourth module is equipped with a fourth inlet and outlet pipe 41. The inlet part of the fourth inlet and outlet pipe 41 is connected to both ends of the secondary network pump station 25 and is divided into two parts. One part is used to connect to the return water heating pipe 33, and the other part provides the inlet end 42 of the secondary network pump station 25. The outlet part of the fourth inlet and outlet pipe 41 is used to connect to the outlet water heating pipe 32, and the outlet part of the fourth inlet and outlet pipe 41 provides the outlet end 43 of the outlet water heating pipe 32.

[0058] The secondary heating module 19 is formed by the third and fourth modules being detachably connected along the length of the secondary heating frame 23.

[0059] This paper proposes a modular technical solution to reduce the size of a single secondary heating module 19, thereby better adapting it to factory manufacturing. Specifically, the third and fourth modules are manufactured in the factory, connected and tested there, and then the secondary heating module 19 is separated into its third and fourth modules. These modules are then reconnected on-site to form the final secondary heating module 19. This approach ensures production quality and manufacturing consistency while significantly simplifying on-site assembly and construction. Furthermore, both cost and construction time are well controlled.

[0060] Furthermore, such as Figure 1 , 2 As shown in Figure 8, it also includes a water replenishment module 48. The third module, the fourth module, and the water replenishment module 48 are sequentially and detachably connected along the length of the secondary heating grid 23 to form the secondary heating grid module 19. In this way, since the secondary heating grid module 19 is connected to the entire user side, there may be leakage. Therefore, setting up the water replenishment module 48 helps to ensure the working performance of the secondary heating grid module 19.

[0061] In some embodiments, such as Figure 7 , 8 As shown, the water replenishment module 48 includes a support frame 44, a water tank 45, a water replenishment pump 46, and a water replenishment pipe 47. The support frame 44 is a straight frame. The water replenishment pipe 47 is connected to the water tank 45 through the water replenishment pump 46. When the fourth module and the water replenishment module 48 are connected, the water replenishment pipe 47 is connected to the inlet section of the fourth inlet / outlet pipe 41 through a pipeline. Figure 7 , 8 As shown, the pipeline is divided into a part installed on the fourth module and another part installed on the water supply module 48, and the two parts are connected together.

[0062] To further enhance the performance of this disclosure, a plate-type heat exchanger is proposed, in which a plate-shaped heating element is sandwiched between two adjacent plate-shaped heat exchange plates. The medium flowing through the plate-shaped heat exchange plates can rapidly absorb heat from the plate-shaped heating element. This design not only provides a large heat exchange area but also, due to the plate-shaped design, results in a very short heat conduction distance, thus improving heat exchange efficiency and energy efficiency. Furthermore, this disclosure offers the advantage of rapid heating. Such a plate-type heat exchanger makes the temperature increase of the first medium in the primary electric heating module 18 more efficient and can provide greater heat in a shorter time. In addition, its size can be reduced, making it suitable for use in a modular electric heating unit of this disclosure. This further ensures expandability; that is, based on one primary electric heating module 18, more secondary heating modules 19 can be added, thus achieving greater flexibility in adding or removing secondary heating modules 19.

[0063] like Figures 9 to 21 As shown, a plate heat exchanger disclosed herein includes plate heat exchange plates 12, a first fixed template and a second fixed template 14, with multiple plate heat exchange plates 12 sandwiched between the first fixed template and the second fixed template 14. It also includes a plate heating element 4, which is sandwiched between two adjacent plate heat exchange plates 12. One side of the plate heating element 4 is attached to the adjacent plate heat exchange plate 12, and the other side of the plate heating element 4 is attached to the adjacent plate heat exchange plate 12. The plate heating element 4 heats two adjacent plate heat exchange plates 12 simultaneously.

[0064] In some embodiments, the sheet heating element 4 is a flexible sheet heating element 4. This allows the sheet heating element 4 to be better attached to the two adjacent sheet heat exchange plates 12, resulting in a better fit. For example, the sheet heating element 4 can be a flexible thin-film electric heating device. The flexible thin-film electric heating device can adopt existing technology, such as an electric heating sheet, which is a soft and flexible thin-film electric heating device. This electric heating sheet is formed by evenly distributing a foil-shaped or filamentous metal heating element between glass fiber cloth coated with high-temperature resistant silicone rubber, and then molding it at high temperature. It is thin, lightweight, heats up quickly when energized, and has the characteristics of large heating surface, uniform heating, weather resistance, corrosion resistance, environmental friendliness, flame retardancy, convenient installation, long service life, and high insulation strength. Therefore, because the main raw material of the electric heating sheet is silicone rubber, it is also called a "silicone rubber electric heating sheet".

[0065] It should be noted that the sheet heating element 4 is not limited to any particular structure. Any sheet-shaped heating element 4 that is suitable can be used in this patent. For example, the sheet heating element 4 can be a flexible alloy heating wire or a thick film heating sheet.

[0066] In some embodiments, such as Figures 15 to 21As shown, this disclosure proposes a plate-shaped heat exchange plate, which includes a plate-shaped flow channel plate 1 and a first plate-shaped cover plate 2. The plate-shaped flow channel plate 1 has a first flow channel 3 on its front side. The first plate-shaped cover plate 2 is stacked and connected to the front side of the plate-shaped flow channel plate 1 so that the first plate-shaped cover plate 2 covers the first flow channel 3 to form a first flow channel. The plate-shaped heating element 4 located on the front side of the plate-shaped flow channel plate 1 is attached to the outer side of the first plate-shaped cover plate 2 and covers the area of ​​the outer side corresponding to the first flow channel.

[0067] Thus, this disclosure achieves a sheet heating scheme by designing a sheet-like heating element 4 that is attached to the outer side of the first sheet-like cover plate 2 and covers the area of ​​the outer side corresponding to the first flow channel. Furthermore, the first sheet-like cover plate 2 and the front side of the sheet-like flow channel plate 1 are stacked and connected so that the first sheet-like cover plate 2 covers the first flow channel 3 to form the first flow channel. Since there is a large coverage area between the sheet-like heating element 4 and the outer side of the first sheet-like cover plate 2, and the inner side of the first sheet-like cover plate 2 is the first flow channel 3, the medium flowing in the first flow channel 3 can quickly absorb the heat conducted from the first sheet-like cover plate 2. Not only is the heat exchange area large, but the distance is also very close, which is beneficial to the heat exchange efficiency and thus further improves energy efficiency.

[0068] In this example, the sheet-like flow channel plate 1, the first sheet-like cover plate 2, the sheet-like heating element 4, the first fixed template and the second fixed template 14 all adopt a rectangular sheet-like structure, and the first flow channel 3 is a labyrinth channel that extends in an S-shape along the length direction of the sheet-like flow channel plate 1.

[0069] like Figure 7 As shown, the sheet-shaped heating element 4 has a large area, completely covering the area of ​​the first sheet-shaped cover plate 2 corresponding to the first flow channel.

[0070] In some embodiments, such as Figure 14 , 15 As shown in Figure 17, the plate heat exchanger 12 also includes a second plate cover 5. A second flow channel 6 is provided on the rear side of the plate flow channel plate 1. The second plate cover 5 is stacked and connected to the rear side of the plate flow channel plate 1 so that the second plate cover 5 covers the second flow channel 6 to form a second flow channel. The plate heating element 4 located on the rear side of the plate flow channel plate 1 is attached to the outer side of the second plate cover 5 and covers the area of ​​the outer side corresponding to the second flow channel. The second plate cover 5 is also rectangular. Thus, the provision of the second flow channel helps to increase the medium flow rate.

[0071] Furthermore, in order to make it thinner, two adjacent plate heat exchange plates 12 share a plate cover. That is, this shared plate cover serves as the second plate cover 5 for the adjacent front plate heat exchange plate 12, and as the first plate cover 2 for the adjacent rear plate heat exchange plate 12.

[0072] In some embodiments, such as Figure 21 As shown, the first flow channel 3 and the second flow channel 6 are arranged alternately and sequentially, and adjacent first flow channels 3 and second flow channels 6 share adjacent side portions 7. In this way, on the one hand, the first flow channels 3 and the second flow channels 6 are close to each other, with a compact structure, which is conducive to heat exchange; on the other hand, it is conducive to manufacturing the first flow channels 3 and the second flow channels 6 with roughly the same height along the front and back direction of the plate-shaped flow channel plate 1, which is conducive to making them thinner. Making them thinner also allows the plate-shaped heating element 4 to better heat the medium in the first flow channel and the second flow channel simultaneously.

[0073] For better heat exchange, such as Figure 17 As shown, the second flow channel 6 is also configured as a labyrinth channel extending in an S-shape along the length of the sheet-like flow channel plate 1.

[0074] In some embodiments, such as Figure 16 , 17 As shown in Figure 21, the plate-shaped flow channel 1 has a medium inlet 8 and an outlet 9 respectively on its front and rear sides at one end along its length. This is beneficial for extending the first and second flow channels.

[0075] like Figure 9 , 10 As shown in 11, 12, 13, 14, 15, 16, 17, and 21, a first through hole 10 is provided at the inlet 8 of the sheet-like flow channel plate 1. The medium enters the first flow channel 3 through the first through hole 10 and the inlet 8 on the front side. The medium enters the second flow channel 6 through the first through hole 10 and the inlet 8 on the rear side. A second through hole 11 is provided at the outlet 9 of the sheet-like flow channel plate 1. The medium flows out of the first flow channel 3 through the outlet 9 on the front side and the second through hole 11. The medium flows out of the second flow channel 6 through the outlet 9 on the rear side and the second through hole 11. When the first fixed template, multiple sheet-like heat exchange plates 12, and the second fixed template 14 are sequentially stacked and connected, the first through hole 10 and the second through hole 11 penetrate each sheet-like heat exchange plate 12 and the first fixed template and / or the second fixed template 14 along the thickness direction of the heating control method of the electric heating system. In this way, the structure is simple and compact on the one hand, and it is convenient to assemble into a medium inlet pipe and a medium outlet pipe on the other hand. That is, the first fixed template, each plate heat exchange plate 12 and the second fixed template 14 are stacked and connected in sequence to form the first through hole 10 and the second through hole 11.

[0076] In this example, the first through hole 10 and the second through hole 11 penetrate each sheet heat exchange plate 12 and the first fixed template along the thickness direction of the heating control method of the electric heating system, so that the second fixed template 14 serves as the bottom of the first through hole 10 and the second through hole 11, thereby further simplifying the structure.

[0077] To guide the medium through the first through hole 10 and inlet 8 into the sheet-like flow channel plate 1, and similarly, to guide the medium out of the sheet-like flow channel plate 1 through outlet 9 and second through hole 11, a sealing ring is provided between the first sheet-like cover plate 2 and the front side of the sheet-like flow channel plate 1, such as... Figure 19 The image shows a sealing ring with an open design on the side of the first through hole 10 facing the inlet 8 and the side of the second through hole 11 facing the outlet 9, thereby guiding the medium through the first through hole 10 and the inlet 8 into the sheet-like flow channel plate 1. Similarly, the sealing ring guides the medium through the outlet 9 and the second through hole 11 to flow out of the sheet-like flow channel plate 1.

[0078] To better prevent leaks, such as Figure 19 The sealing ring shown also extends along the periphery of the first flow channel; similarly, the sealing ring can also be provided in the second flow channel.

[0079] In some embodiments, such as Figure 9 , 10 As shown in Figures 11, 12, and 13, the plate-shaped heat exchange plate 12, the plate-shaped heating element 4, the first fixed template, and the second fixed template 14 are all arranged vertically to form a heating control method for a vertical electric heating system. It also includes a base 15, which is connected to the lower end of the heating control method. The base 15 is used for vertically mounting the heating control method, and the lower end of the heating control method has the first through hole 10 and the second through hole 11. This results in a more compact structure. Furthermore, it facilitates the connection of pipes to the side near the base 15, thus avoiding the pipes being suspended at a high position, thereby optimizing the pipe layout. The pipes include an inlet pipe and an outlet pipe; the inlet pipe connects to the first through hole 10, and the outlet pipe connects to the second through hole 11.

[0080] In some embodiments, such as Figure 11 , 12 As shown in Figure 14, in order to stack and assemble the plate heat exchange plates 12 more accurately, the plate heat exchange plates 12 are provided with positioning grooves 16 at both the upper and lower ends. By inserting positioning pins into the positioning grooves 16, the plate heat exchange plates 12 are stacked and assembled together more accurately. The clamping and fixing are achieved by connecting and fixing the first fixing template and the second fixing template 14 with bolts 17, thereby clamping and fixing each plate heat exchange plate 12 with the first fixing template and the second fixing template 14, and simultaneously clamping and fixing the plate heating element 4.

[0081] It should be noted that this disclosure does not require that each pair of adjacent plate heat exchange plates 12 be sandwiched with a plate heating element 4. The plate heating element 4 can be flexibly added or removed according to the need to increase or decrease the heating power.

[0082] When understanding this disclosure, the above structure may be referred to other embodiments / appendices if necessary. Figure 1 And that is understood, so I will not elaborate further here.

[0083] The above description is merely an illustrative embodiment of this utility model. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of this utility model are included within the scope of protection of this utility model.

Claims

1. A modular electric heating unit, characterized in that, The system includes a primary heating module (18) and a secondary heating module (19). The primary heating module (18) includes a primary heating frame (20), an electric heating unit (21), and a primary heating pump station (22). The secondary heating module (19) includes a secondary heating frame (23), a heat exchange unit (24), and a secondary heating pump station (25). The electric heating unit (21) and the primary heating pump station (22) are installed in the primary heating frame (20), and the heat exchange unit (24) and the secondary heating pump station (25) are installed in the secondary heating frame (23). The primary heating frame (20) is located on one side of the secondary heating frame (23) and arranged side by side. A heat exchange inlet (26) and a heat exchange outlet (27) are provided on the heat exchange unit (24) facing the side of the first grid frame (20) to connect the heat exchange unit (24). A heat exchange outlet (28) and a heat exchange inlet (29) are provided on the first grid frame (22) facing the side of the second grid frame (23). The heat exchange outlet (28) and the heat exchange inlet (26) are detachably connected. The heat exchange inlet (29) and the heat exchange outlet (27) are detachably connected. When expansion is required, a new secondary heating module (19) is added in parallel with the existing secondary heating module (19). The new secondary heating module (19) also has a corresponding secondary heat exchange inlet (26) and secondary heat exchange outlet (27). The new secondary heat exchange inlet (26) is detachably connected to the existing adjacent secondary heat exchange inlet (26) through a first transition pipe (30). The new secondary heat exchange outlet (27) is detachably connected to the existing adjacent secondary heat exchange outlet (27) through a second transition pipe (31). Each heat exchange unit (24) is also connected to an outlet heating pipe (32) and a return heating pipe (33). The return heating pipe (33) is also connected to the outlet (43) of the secondary network pump station (25). The inlet (42) of the secondary network pump station (25) is connected to the return end of the user-side heat exchanger through a pipeline. The outlet (43) of the outlet heating pipe (32) is used to connect to the inlet end of the user-side heat exchanger through a pipeline.

2. Modular electric heating unit according to claim 1, characterized in that, The network frame (20) is divided into two parts along its length, namely the first part (34) and the second part (35). The first part (34) is equipped with an electric heating unit (21) as the first module. The first module is provided with a first inlet and outlet pipe (36) connected to the inlet and outlet of the electric heating unit (21). The second part (35) is equipped with a network pump station (22) as the second module. The second module is provided with a second inlet and outlet pipe (37). The inlet part of the second inlet and outlet pipe (37) is connected to both ends of the network pump station (22) and is divided into two parts. One part is used to connect to the inlet end of the first inlet and outlet pipe (36), and the other part provides the network heat exchange water inlet interface (29). One end of the outlet part of the second inlet and outlet pipe (37) is used to connect to the outlet end of the first inlet and outlet pipe (36), and the other end of the outlet part of the second inlet and outlet pipe (37) provides the network heat exchange water outlet interface (28). The electric heating module (18) is formed by the first module and the second module being detachably connected along the length of the electric heating frame (20).

3. The modular electric heating unit of claim 1, wherein, The second-network rack (23) is divided into two parts along its length, namely the third part (38) and the fourth part (39). The third part (38) is equipped with heat exchange unit (24) as the third module. The third module is provided with a third inlet and outlet pipe (40) connected to the first inlet and outlet of the heat exchange unit (24), an outlet water heating pipe (32) connected to the second inlet and outlet of the heat exchange unit (24), and a return water heating pipe (33). The inlet part of the third inlet and outlet pipe (40) provides the second-network heat exchange inlet water interface (26), and the outlet part of the third inlet and outlet pipe (40) provides the second-network heat exchange outlet water interface (27). The fourth part (39) installs the second network pump station (25) as the fourth module. The fourth module is equipped with a fourth inlet and outlet pipe (41). The inlet part of the fourth inlet and outlet pipe (41) is connected to both ends of the second network pump station (25) and is divided into two parts. One part is used to connect with the return water heating pipe (33), and the other part provides the inlet end (42) of the second network pump station (25). The outlet part of the fourth inlet and outlet pipe (41) is used to connect with the outlet water heating pipe (32), and the outlet part of the fourth inlet and outlet pipe (41) provides the outlet end (43) of the outlet water heating pipe (32). The second-network heating module (19) is formed by the third module and the fourth module being detachably connected along the length of the second-network frame (23).

4. Modular electric heating unit according to claim 3, characterized in that, It also includes a water replenishment module (48). The third module, the fourth module, and the water replenishment module (48) are sequentially and detachably connected along the length of the second grid frame (23) to form a second grid heating module (19).

5. Modular electric heating unit according to claim 4, characterized in that, The water replenishment module (48) includes a support frame (44), a water tank (45), a water replenishment pump (46), and a water replenishment pipe (47). The water replenishment pipe (47) is connected to the water tank (45) through the water replenishment pump (46). When the fourth module and the water replenishment module (48) are connected, the water replenishment pipe (47) is connected to the inlet section of the fourth inlet and outlet pipe (41) through a pipeline.

6. The modular electric heating unit of claim 1, wherein, The electric heating unit (21) adopts a plate heat exchanger, which includes a plate heat exchange plate (12), a first fixed template (13), a second fixed template (14) and a plate heating element (4). Multiple plate heat exchange plates (12) are sandwiched between the first fixed template (13) and the second fixed template (14). The plate heating element (4) is sandwiched between two adjacent plate heat exchange plates (12). One side of the plate heating element (4) is attached to the adjacent plate heat exchange plate (12), and the other side of the plate heating element (4) is attached to the adjacent plate heat exchange plate (12). The plate heating element (4) heats two adjacent plate heat exchange plates (12) at the same time.

7. Modular electric heating unit according to claim 6, characterized in that, The plate heat exchange plate (12) includes a plate flow channel plate (1) and a first plate cover plate (2). The plate flow channel plate (1) has a first flow channel (3) on its front side. The first plate cover plate (2) is stacked and connected to the front side of the plate flow channel plate (1) so that the first plate cover plate (2) covers the first flow channel (3) to form a first flow channel. The plate heating element (4) located on the front side of the plate flow channel plate (1) is attached to the outer side of the first plate cover plate (2) and covers the area of ​​the outer side corresponding to the first flow channel.

8. Modular electric heating unit according to claim 7, characterized in that, The plate heat exchange plate (12) also includes a second plate cover plate (5). The plate flow channel plate (1) is provided with a second flow channel (6) on its rear side. The second plate cover plate (5) and the rear side of the plate flow channel plate (1) are stacked and connected so that the second plate cover plate (5) covers the second flow channel (6) to form a second flow channel. The plate heating element (4) located on the rear side of the plate flow channel plate (1) is attached to the outer side of the second plate cover plate (5) and covers the area of ​​the outer side corresponding to the second flow channel.

9. The modular electric heating unit as described in claim 8, characterized in that, Two adjacent plate heat exchange plates (12) share a single plate cover.

10. The modular electric heating unit as described in claim 8, characterized in that, The first flow groove (3) and the second flow groove (6) are arranged alternately in sequence, and the adjacent first flow groove (3) and the second flow groove (6) share the adjacent side (7).

11. The modular electric heating unit as described in claim 8, characterized in that, A sheet-like flow channel plate (1) has an inlet (8) and an outlet (9) for a first medium on its front and rear sides, respectively, at one end along its length. A first through hole (10) is provided at the inlet (8). The first medium enters the first flow channel (3) through the first through hole (10) and the inlet (8) on the front side. The first medium enters the second flow channel (6) through the first through hole (10) and the inlet (8) on the rear side. A second through hole (11) is provided at the outlet (9). The first medium enters the second flow channel (6) through the inlet (8) on the front side. The outlet (9) and the second through hole (11) flow out of the first flow groove (3), and the first medium flows out of the second flow groove (6) through the outlet (9) and the second through hole (11) on the rear side. When the first fixed template (13), multiple plate heat exchange plates (12) and the second fixed template (14) are sequentially stacked and connected, the first through hole (10) and the second through hole (11) penetrate each plate heat exchange plate (12) along the thickness direction of the plate heat exchanger and penetrate the first fixed template (13) and / or the second fixed template (14).

12. The modular electric heating unit as described in claim 11, characterized in that, The plate heat exchange plate (12), the plate heating element (4), the first fixed template (13) and the second fixed template (14) are all arranged vertically to form a vertical plate heat exchanger. It also includes a base (15), which is connected to the lower end of the plate heat exchanger. The base (15) is used to vertically install the plate heat exchanger, and the lower end of the plate heat exchanger is provided with the first through hole (10) and the second through hole (11).

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