Rechargeable mosquito killer

Abstract

The embodiment of the utility model discloses a rechargeable mosquito killer, which is used for solving the problems of large volume, high energy consumption and high production cost caused by the need of a boosting module in the existing PTC (Positive Temperature Coefficient) heating rechargeable mosquito killer. The mosquito killer provided by the utility model comprises a hollow shell; the charging power supply is arranged on the inner bottom side of the shell, and a switch and a charging port of the charging power supply are arranged on the side wall of the shell; the heating module is arranged on the top side of the interior of the shell and comprises a heat insulation block located on the bottom layer, an MCH heating piece installed on the top of the heat insulation block and a metal piece tightly attached to the upper surface of the MCH heating piece, the voltage output end of the charging power source is electrically connected with the voltage input end of the MCH heating piece, and the top of the shell is provided with an open hole for the metal piece to be exposed out. A boosting module is not needed between the charging power supply and the heating sheet, so that the product cost can be reduced, the energy consumption is low, the size is small, the portable electric heating device is more convenient to carry, and the device is suitable for field camping or occasions without mains supply.

Description

Technical Field

[0001] This utility model relates to rechargeable mosquito repellent devices, and more particularly to a rechargeable mosquito repellent device that uses a metal ceramics heater (MCH) for heating. Background Technology

[0002] Electric mosquito repellents are more popular than traditional burning mosquito coils because they offer advantages such as no open flame or smoke, safety and cleanliness, good effectiveness, and ease of use. Currently, most commonly used electric mosquito repellents use PTC heating elements, which are typically powered by 220V. This significantly limits their usability; they cannot be used for outdoor camping or in places like student dormitories where power is cut off at night, thus failing to meet the need for mosquito control.

[0003] To address this issue, some researchers have proposed rechargeable electric mosquito repellent devices that use rechargeable batteries as the power source for the PTC heating element. However, since the output voltage of commonly used portable power modules such as lithium batteries is generally below 5V, while the operating voltage of most PTC heating elements is 5V or higher, existing rechargeable mosquito repellent devices often require a boost converter to raise the output voltage of the charging power supply to the operating voltage of the PTC heating element for normal operation. The use of a boost converter not only increases the size of the rechargeable mosquito repellent device and increases energy consumption during the boosting process, but also increases the production cost. Utility Model Content

[0004] In view of this, this utility model provides a rechargeable mosquito repellent device to solve the problems of large size, high energy consumption, and high production cost caused by the need for a boost module in existing PTC-heated rechargeable mosquito repellent devices.

[0005] This utility model embodiment provides a rechargeable mosquito repellent device, comprising:

[0006] A shell, hollow inside;

[0007] The charging power supply is located inside the bottom side of the housing, and its switch and charging port are both located on the side wall of the housing.

[0008] A heating module is disposed on the inner top side of the housing; the heating module includes: a heat insulation block located at the bottom layer, an MCH heating element installed on the top of the heat insulation block, and a metal sheet attached to the upper surface of the MCH heating element; the voltage output terminal of the charging power supply is electrically connected to the voltage input terminal of the MCH heating element; the top of the housing has an opening for the metal sheet to be exposed.

[0009] In some embodiments, the charging power supply includes a lithium battery with an output voltage of 3.7V.

[0010] In some embodiments, the housing includes:

[0011] The lower shell is a barrel-shaped shell that is closed at the bottom and sides, and the charging power supply is installed inside the lower shell;

[0012] The middle shell has columnar sidewalls and a horizontal partition inside it. The horizontal partition has a through hole. The bottom of the middle shell is connected to the top of the lower shell.

[0013] The upper shell is fitted into the opening at the top of the middle shell at its bottom. The upper shell has an opening for the metal sheet to be exposed. The heating module is installed in the space formed by the middle shell and the upper shell.

[0014] In some embodiments, the top of the lower shell sidewall has a recessed mounting groove, and the shape and size of the bottom of the columnar sidewall of the middle shell match the mounting groove so as to connect the lower shell and the middle shell by embedding the bottom portion of the columnar sidewall into the mounting groove; the sidewall of the middle shell is also provided with a first disassembly port.

[0015] In some embodiments, the metal sheet comprises:

[0016] The working plate has its lower surface in close contact with the upper surface of the MCH heating element, and the upper surface of the working plate is the heating surface of the rechargeable mosquito repellent device.

[0017] At least two pairs of support arms, each pair extending downwards from the bottom of the working plate in an inwardly hooked L-shape, with the inward hooks of each pair of support arms facing each other, and any two pairs of support arms aligned with each other in a predetermined horizontal direction; the heat insulation block is installed on the inner side of at least two pairs of support arms on the lower side of the working plate; and

[0018] Several prongs, the prongs extending outward from the outer edge of the working plate by a first predetermined dimension and then bending downward;

[0019] The middle shell has a horizontal partition plate with a number of support columns that are the same as the number of the prongs and correspond one-to-one with the positions of the prongs. The top of the support column has a recessed slot, the size of which is adapted to the bottom size of the prong, so that the heating module can be installed on the middle shell by inserting the prong into the slot.

[0020] In some embodiments, the top inner diameter of the lower shell is larger than the bottom inner diameter, so that a first recessed platform is formed on the upper side of the inner sidewall of the lower shell; above the first recessed platform, an inwardly protruding limiting block is provided on the upper side of the inner sidewall of the lower shell.

[0021] The housing also includes a T-shaped plate, which is mounted on the first recessed platform and is vertically limited by the limiting block.

[0022] In some embodiments, the upper surface of the T-shaped plate has a recessed second platform, and the charging end of the charging power supply is connected to the charging port through a TP4056 charging module, which is installed at the second platform.

[0023] In some embodiments, a heat sink is installed at the bottom of the horizontal partition of the middle shell, directly opposite the TP4056 charging module.

[0024] In some embodiments, a flexible photovoltaic panel is mounted on the outer wall of the housing, and the bottom of the housing has several legs. The legs and the housing are connected by threads. The height of the legs is adjusted by adjusting the depth to which the legs are screwed into the threaded holes at the bottom of the housing, thereby adjusting the tilt of the housing relative to the horizontal plane.

[0025] In some embodiments, the rechargeable mosquito repellent device further includes:

[0026] The top cover is a grid-like spherical cover with a hinge seat at its bottom and a buckle on the opposite side of the hinge seat; the top cover is rotatably connected to the top of the housing through the hinge seat and connected to the buckle seat on the top of the housing.

[0027] The rechargeable mosquito repellent device provided in this embodiment of the invention has at least the following beneficial effects:

[0028] 1. The low-voltage output charging power supply directly powers the low-operating-voltage MCH heating element, eliminating the need for a boost module between the two. This reduces product costs, results in low energy consumption, and makes the product more portable due to its smaller size.

[0029] 2. High heating temperature, reaching over 500℃, rapid heating, fast temperature compensation, high thermal efficiency, and heating element material does not contain harmful substances, making it more environmentally friendly and safer than traditional mosquito coil heaters heated by PCT.

[0030] 3. Compared with electric mosquito repellents using PTC ceramic heating elements, the mosquito repellent of this application can save 20-30% of electricity while having the same heating effect, and has the advantages of being more energy-efficient, stable, and having a longer lifespan.

[0031] 4. Heating is achieved through a larger metal sheet, resulting in a larger contact area and more uniform heating;

[0032] 5. The housing is designed in three parts, with the heating module and charging power supply installed in two separate chambers. This improves battery performance, facilitates separate maintenance of the charging power supply and heating module, and reduces the difficulties of disassembly and assembly caused by assembling the two together. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of a rechargeable mosquito repellent device provided by this utility model;

[0035] Figure 2 This is a schematic diagram of the lower shell 11;

[0036] Figure 3 This is a schematic diagram of the structure of the middle shell 12;

[0037] Figure 4 This is a schematic diagram of the upper shell 13;

[0038] Figure 5 This is a schematic diagram of the structure of heating module 3;

[0039] Figure 6 A tilted schematic diagram of the rechargeable mosquito repellent device provided by this utility model;

[0040] Figure 7 This is a schematic diagram of the top cover 5.

[0041] Figure label:

[0042] 1. Housing; 2. Charging power supply; 3. Heating module; 4. Flexible photovoltaic panel; 5. Top cover; 6. Support legs; 7. Power indicator light;

[0043] 11. Lower shell; 12. Middle shell; 13. Upper shell; 14. T-shaped plate;

[0044] 111. Mounting slot; 112. First recessed platform; 113. Limiting block; 114. Limiting plate;

[0045] 121. Columnar sidewall; 122. Horizontal partition; 123. Wire hole; 124. Disassembly port; 125. Support column; 126. Slot;

[0046] 131. Opening;

[0047] 141. Second sinkhole;

[0048] 21. Switch; 22. Charging port;

[0049] 31. Insulation block; 32. MCH heating element; 33. Metal sheet;

[0050] 331. Work plate; 332. Support arm; 333. Leg insert;

[0051] 51. Hinge seat; 52. Buckle; 53. Spherical cover. Detailed Implementation

[0052] The following is a detailed description of a rechargeable mosquito repellent device according to an embodiment of the present invention, with reference to the accompanying drawings.

[0053] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0054] Figure 1 This is a schematic diagram of the structure of a rechargeable mosquito repellent device provided in an embodiment of the present invention. The mosquito repellent device includes:

[0055] Shell 1, which is hollow inside, such as Figure 1 As shown in the figure, the housing 1 provided in this embodiment may include a lower housing 11, a middle housing 12 and an upper housing 13; Figure 2 This is a schematic diagram of the lower shell 11. Figure 3 This is a schematic diagram of the structure of the middle shell 12. Figure 4 This is a schematic diagram of the upper shell 13.

[0056] The charging power supply 2 is located on the inner bottom side of the housing 1 (e.g., Figure 1 As shown in the dashed box, the switch 21 and the charging port 22 are both located on the side wall of the housing 1; preferably, the charging port 22 can adopt the existing mainstream mobile phone data cable charging port form, such as the Type-C charging interface or the Lightning charging port, etc. Since mobile phone data cables are now ubiquitous, there is no need to equip this device with a dedicated charging cable, which reduces production costs.

[0057] Heating module 3 is located on the top side inside the housing 1; Figure 5 This is a schematic diagram of the structure of heating module 3, as shown below. Figure 5As shown, the heating module 3 includes: a heat insulation block 31 located at the bottom, an MCH heating element 32 mounted on top of the heat insulation block 31, and a metal sheet 33 attached to the upper surface of the MCH heating element 32. The voltage output terminal of the charging power supply 2 is electrically connected to the voltage input terminal of the MCH heating element 32. The top of the housing 1 has an opening 131 for the metal sheet 33 to be exposed. Preferably, the charging power supply 2 is a 13000mAh lithium battery with an output voltage of 3.7V, which is just enough to directly connect to the MCH heating element 32 with an operating voltage of 3.7V.

[0058] When using this mosquito repellent device, turn on switch 21. The charging power supply 2 heats the MCH heating element 32 in the heating module 3 through the connecting wire. The MCH heating element 32 transfers heat to the larger metal plate 33, which in turn heats the solid mosquito repellent tablet evenly to repel mosquitoes.

[0059] In this embodiment of the invention, the low-voltage output charging power supply 2 directly supplies power to the low-operating-voltage MCH heating element 32, eliminating the need for a boost module. This reduces product costs, reduces energy consumption, and makes the device smaller and more portable. Furthermore, PTC heating elements typically have a heating temperature of only around 200℃, resulting in low heating efficiency. Elements with heating temperatures above 120℃ generally use lead tetroxide, which, due to its high lead content, may volatilize at high temperatures. MCH materials, on the other hand, have a high heating temperature, reaching over 500℃, with rapid heating, fast temperature compensation, and high thermal efficiency. Moreover, MCH materials do not contain harmful substances such as lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBBBs), or polybrominated diphenyl ethers (PBDEs), making them more environmentally friendly and safer than traditional mosquito repellents. Experimental results show that, compared to electric mosquito repellents using PTC ceramic heating elements, this application saves 20-30% more energy while maintaining the same heating effect. Therefore, compared to existing PTC-heated electric mosquito repellents, this application offers advantages such as greater energy efficiency, environmental friendliness, safety, stability, and longer lifespan.

[0060] Preferably, the metal sheet 33 is made of tin material with a lower specific heat capacity to further extend the battery life.

[0061] The lower shell 11 is a barrel-shaped shell with a closed bottom and sides, and the charging power supply 2 ( Figure 2 (Not shown) is installed inside the lower shell 11. The middle shell 12 has columnar sidewalls 121, within which a horizontal partition 122 is provided. A wire through hole 123 is opened on the horizontal partition 122. The bottom of the middle shell 12 is connected to the top of the lower shell 11. (See image below) Figure 4 As shown, the bottom of the upper shell 13 is fitted into the opening at the top of the middle shell 12, and their relative positions are fixed. The middle shell 12 and the upper shell 13 can be connected by internal snap-fit ​​or spiral thread. The upper shell 13 has an opening 131 for the metal sheet 33 to be exposed, and the heating module 3 is installed in the space formed by the middle shell 12 and the upper shell 13.

[0062] Combination Figures 2-4 The housing 1 is designed with three parts, with the heating module 3 and the charging power supply 2 installed independently in two separate chambers. This partially isolates the heating module 3 and the charging power supply 2, reducing the impact of the heat from the heating module 3 on the charging power supply 2. On the one hand, this improves battery performance, and on the other hand, it facilitates separate maintenance of the charging power supply 2 and the heating module 3, reducing the difficulties in disassembly and assembly caused by assembling them together.

[0063] In some embodiments, such as Figures 2-4 As shown, the top of the side wall of the lower shell 11 has a recessed mounting groove 111. The bottom shape and size of the columnar side wall 121 of the middle shell 12 match the mounting groove 111, so that the lower shell 11 and the middle shell 12 are connected by embedding the bottom part of the columnar side wall 121 into the mounting groove 111. The side wall of the middle shell 12 is also provided with a disassembly port 124. When it is necessary to separate the lower shell 11 and the middle shell 12, a screwdriver or a small stick can be inserted into the disassembly port 124 and applied upward force to separate the lower shell 11 and the middle shell 12. In this embodiment, the lower shell 11 and the middle shell 12 are connected by a boltless method. The connection method is simple and reduces the requirements for users compared with the bolted connection method. It can be disassembled and assembled without professional tools, which is suitable for students' labor education classes and students to make their own mosquito coils.

[0064] like Figure 5 As shown, the metal sheet 33 of this application may include: a working plate 331, at least two pairs of support arms 332, and several legs 333; wherein: the lower surface of the working plate 331 is in close contact with the upper surface of the MCH heating element 32, and the upper surface of the working plate 331 is the heating surface of the mosquito coil; the support arms 332 extend downward from the bottom of the working plate 331 in an inwardly hooked L-shape, the inward hooks of each pair of support arms 332 are opposite each other, and any two pairs of support arms 332 are aligned with each other in a predetermined horizontal direction; the heat insulation block 31 is installed on the inner side of at least two pairs of support arms 332 on the lower side of the working plate 331; obviously, as Figure 5 As shown, since the support arms 332 are aligned with each other in a predetermined horizontal direction, the heat insulation block 31 can be inserted into or removed from the multi-point support platform formed by the inner hooks of the support arms 332 in the predetermined horizontal direction. This not only creates installation space for the heat insulation block 31, but also makes it easy to assemble and disassemble the heat insulation block 31, facilitating later maintenance and replacement. The insert 333 extends outward from the outer edge of the working plate 331 by a first predetermined dimension and then bends downward. In this embodiment, as... Figure 3As shown, the horizontal partition 122 of the middle shell 12 is provided with a plurality of support columns 125, the same number as the number of the prongs 333 and corresponding one-to-one with the positions of the prongs 333. The top of the support column 125 has a recessed slot 126, the size of which is adapted to the bottom size of the prongs 333, so that the heating module 3 can be installed on the middle shell 12 by inserting the prongs 333 into the slot 126. In this embodiment, the metal sheet 33 heats the mosquito coil through a working plate 331 with a larger area than the MCH heating plate 32, resulting in more uniform heating and energy saving. In addition, the interlocking design of the prongs 333 and the support columns 125 allows the heating module 3 to be installed on the middle shell 12 without bolts and special tools, and disassembly is also simpler. On the other hand, it can further increase the distance between the heating module 3 and the bottom charging power supply 2, so that the heat insulation block 31 is suspended, further reducing the impact of the heat generated by the heating module 3 on the bottom charging power supply 2 and its accessories (such as its charging module), and improving the battery performance of the charging power supply 2.

[0065] In some embodiments, such as Figure 2 As shown, the top inner diameter of the lower shell 11 is larger than the bottom inner diameter, so that a first recessed platform 112 is formed on the upper side of the inner wall of the lower shell 11; on the upper side of the first recessed platform 112, an inwardly protruding limiting plate 114 is provided on the upper side of the inner wall of the lower shell 11; in this embodiment, as Figure 2 As shown, the housing 1 also includes a T-shaped plate 14, which is mounted on the first recessed platform 112 and is vertically limited by a limiting block 113. In this embodiment, after the rechargeable battery pack (such as a lithium battery pack) of the power module 2 is installed inside the lower housing 11, the T-shaped plate 14 is installed above the battery pack. The bottom of the T-shaped plate 14 contacts the top of the rechargeable battery of the power module 2, and the limiting block 113 restricts the T-shaped plate 14 so that it cannot move upward, thereby pressing the rechargeable battery so that the rechargeable battery can be stably fixed inside the lower housing 11 without bolts or other accessories. As for the degree of freedom of the rechargeable battery in the horizontal direction, such as Figure 2 As shown, the inner wall of the lower shell 11 is provided with several limiting plates 114, so that the mounting position of each rechargeable battery is formed between adjacent limiting plates 114, thereby preventing the rechargeable battery from shifting in the horizontal direction. With this design, the rechargeable battery can be fixed without designing bolt mounting brackets, saving space and cost, and the battery is easy to install and remove.

[0066] Preferably, such as Figure 2As shown, the upper surface of the T-shaped plate 14 has a recessed second platform 141. The charging end of the charging power supply 2 is connected to the charging port 22 through a charging module, and the charging module is installed at the second platform 141. In this embodiment, the T-shaped plate 14 not only limits the rechargeable battery of the power module 2, but also provides an installation position for the charging module of the rechargeable battery, further reducing the installation space and facilitating the miniaturization of the mosquito coil device. Preferably, the charging module is a TP4056 charging module.

[0067] Preferably, a heat sink is installed at the bottom of the horizontal partition 122 of the middle shell 12, directly opposite the charging module, to dissipate heat from the charging module when it is charging the battery, thereby improving the working performance of the charging module and extending its service life.

[0068] In some embodiments, such as Figure 1 As shown, a flexible photovoltaic panel 4 is installed on the outer side wall of the housing 1. In this embodiment, the bottom of the housing 1 has several legs 6. The legs 6 and the housing 1 are connected by threads. The height of the legs 6 (i.e. the length of the legs 6 extending out of the bottom surface of the housing 1) can be adjusted by adjusting the depth of the legs 6 screwed into the threaded hole at the bottom of the housing 1, thereby adjusting the tilt of the housing 1 relative to the horizontal plane. Figure 6 The diagram shows the tilted placement of the rechargeable mosquito repellent provided in this application when the height of the support leg 6 at the bottom of the housing 1 on the lower side of the flexible photovoltaic panel 4 is adjusted to be higher than the height of the support leg 6 on the opposite side. In this embodiment, by setting the flexible photovoltaic panel 4, the charging power supply 2 can be charged by solar energy, utilizing clean energy, reducing power loss, and improving the battery life and practicality of the mosquito repellent. Furthermore, the adjustable support legs allow the flexible photovoltaic panel 4 to tilt upwards, further increasing the area of ​​the flexible photovoltaic panel 4 facing sunlight and improving charging efficiency.

[0069] Many existing plug-in type electric mosquito repellent devices have a socket on the top for inserting the mosquito repellent coil. While this makes insertion convenient, it also poses a risk of burns to the user, especially for curious children who might insert their fingers into the socket and get burned. To solve this problem, preferably, such as Figure 1 As shown, the rechargeable mosquito repellent device of this application also includes a top cover 5. Figure 7The diagram shows the structure of the top cover 5. The top of the top cover 5 is a grid-like spherical cover 53, and its bottom has a hinge seat 51. A buckle 52 is provided on the opposite side of the hinge seat 51. The top cover 5 is rotatably connected to the top of the housing 1 via the hinge seat 51 and connected to a retaining seat on the top of the housing 1 via the buckle 52. When a mosquito coil needs to be inserted, the buckle 52 is disengaged, and the top cover 5 is rotated at the hinge seat 51 to lift one end of the buckle 52. The mosquito coil is then inserted, and the top cover 5 is then closed and connected to the retaining seat on the top of the housing 1 via the buckle 52. When the top cover 5 is connected to the retaining seat on the top of the housing 1 via the buckle 52, the bottom of the spherical cover 53 and the top of the housing 1 are tightly fitted together, or the gap between them is very small, and the grid gap of the spherical cover 53 is smaller than the diameter of a finger. This design prevents fingers from entering the top cover 5 and contacting the metal sheet 33, thus preventing burns.

[0070] Preferably, a power indicator light 7 is also provided on the outer wall of the housing 1. The power indicator light 7 can be a light-emitting diode. The switch 21 is connected to the rechargeable battery in the charging power supply 2 through the power indicator light 7. The working status of the device can be intuitively judged by the status of the power indicator light 7. For example, when the rechargeable battery is low, the power indicator light 7 can be displayed in yellow, and when the rechargeable battery is fully charged, the power indicator light 7 can be displayed in green.

[0071] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rechargeable mosquito repellent device, characterized in that, include: Shell (1), which is hollow inside; A charging power supply (2) is located on the inner bottom side of the housing (1), and its switch (21) and charging port (22) are both located on the side wall of the housing (1); A heating module (3) is disposed on the inner top side of the housing (1); the heating module (3) includes: a heat insulation block (31) located at the bottom layer, an MCH heating element (32) installed on the top of the heat insulation block (31), and a metal sheet (33) closely attached to the upper surface of the MCH heating element (32). The voltage output terminal of the charging power supply (2) is electrically connected to the voltage input terminal of the MCH heating element (32). The top of the housing (1) has an opening (131) for the metal sheet (33) to be exposed.

2. The rechargeable mosquito repellent device according to claim 1, characterized in that, The charging power supply (2) includes a lithium battery with an output voltage of 3.7V.

3. The rechargeable mosquito repellent device according to claim 1, characterized in that, The housing (1) includes: The lower shell (11) is a barrel-shaped shell with the bottom and sides closed, and the charging power supply (2) is installed inside the lower shell (11); The middle shell (12) has columnar sidewalls (121) and a horizontal partition (122) inside it. The horizontal partition (122) has a wire hole (123) and the bottom of the middle shell (12) is connected to the top of the lower shell (11). The upper shell (13) is fitted into the opening at the top of the middle shell (12) at its bottom. The upper shell (13) has an opening (131) for the metal sheet (33) to be exposed. The heating module (3) is installed in the space formed by the middle shell (12) and the upper shell (13).

4. The rechargeable mosquito repellent device according to claim 3, characterized in that, The lower shell (11) has a recessed mounting groove (111) on the top of its side wall. The shape and size of the bottom of the columnar side wall (121) of the middle shell (12) match the mounting groove (111) so that the lower shell (11) and the middle shell (12) are connected by embedding the bottom part of the columnar side wall (121) into the mounting groove (111). The middle shell (12) also has a disassembly port (124) on its side wall.

5. The rechargeable mosquito repellent device according to claim 3, characterized in that, The metal sheet (33) includes: The working plate (331) has its lower surface in close contact with the upper surface of the MCH heating element (32), and the upper surface of the working plate (331) is the heating surface of the rechargeable mosquito repellent device; At least two pairs of support arms (332) extend downward from the bottom of the working plate (331) in an inwardly hooked L-shape, with the inward hooks of each pair of support arms (332) facing each other, and any two pairs of support arms (332) aligned with each other in a predetermined horizontal direction; the heat insulation block (31) is installed on the inner side of at least two pairs of support arms (332) on the lower side of the working plate (331); and A plurality of inserts (333), the inserts (333) extending outward from the outer edge of the working plate (331) by a first predetermined dimension and then bending downward; The middle shell (12) has a horizontal partition (122) with a number of support columns (125) that are the same as the number of the plugs (333) and correspond one-to-one with the positions of the plugs (333). The top of the support column (125) has a recessed slot (126). The size of the slot (126) is adapted to the bottom size of the plugs (333) so that the heating module (3) can be installed on the middle shell (12) by inserting the plugs (333) into the slot (126).

6. The rechargeable mosquito repellent device according to claim 3, characterized in that, The top inner diameter of the lower shell (11) is larger than the bottom inner diameter, so that a first recessed platform (112) is formed on the upper side of the inner wall of the lower shell (11); on the upper side of the first recessed platform (112), an inwardly protruding limiting block (113) is provided on the upper side of the inner wall of the lower shell (11). The housing (1) also includes a T-shaped plate (14), which is mounted on the first recessed platform (112) and is vertically limited by the limiting block (113).

7. The rechargeable mosquito repellent device according to claim 6, characterized in that, The upper surface of the T-shaped plate (14) has a recessed second platform (141), and the charging end of the charging power supply (2) is connected to the charging port (22) through the TP4056 charging module. The TP4056 charging module is installed at the second platform (141).

8. The rechargeable mosquito repellent device according to claim 7, characterized in that, A heat sink is installed on the bottom of the horizontal partition (122) of the middle shell (12), directly opposite the position of the TP4056 charging module.

9. The rechargeable mosquito repellent device according to claim 1, characterized in that, The outer wall of the housing (1) is fitted with a flexible photovoltaic panel (4). The bottom of the housing (1) has several legs (6). The legs (6) and the housing (1) are connected by threads. The height of the legs (6) is adjusted by adjusting the depth of the legs (6) screwed into the threaded hole at the bottom of the housing (1), thereby adjusting the tilt of the housing (1) relative to the horizontal plane.

10. The rechargeable mosquito repellent device according to claim 1, characterized in that, The rechargeable mosquito repellent device also includes: The top cover (5) is a grid-shaped spherical cover (53) with a hinge seat (51) at its bottom and a buckle (52) on the opposite side of the hinge seat (51). The top cover (5) is rotatably connected to the top of the housing (1) through the hinge seat (51) and connected to the buckle seat at the top of the housing (1) through the buckle (52).

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