PTC (Positive Temperature Coefficient) electric heater of electric automobile

Abstract

The utility model belongs to the technical field of electric automobiles, and particularly relates to an electric automobile PTC electric heater which comprises a containing box body, ash removing grooves are formed in the two sides of the bottom of the containing box body, movable limiting grooves are further formed in the two sides of the bottom of the containing box body, and rotating half gears are connected into the movable limiting grooves in a penetrating mode. A press-fit filling sealing plate is fixedly clamped to the top of the placing box body, fixing clamping plates are movably connected to the interior of the placing box body, a heating plate is installed between the two fixing clamping plates, and the press-fit filling sealing plate is used for limiting fixed installation of the fixing clamping plates; the press-fit filling sealing plate also assists the fixing clamping plate in fixedly mounting the heating plate; by arranging related mechanisms such as a cleaning shaft rod and a fixing clamping plate, while bolt and screw connection and fixation are abandoned, the overall dismounting efficiency of the device is improved through a mortise and tenon connection structure, meanwhile, the space between the two heating plates can be cleaned through the device, and the dust cleaning efficiency of the device is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of electric vehicle technology, specifically a PTC electric heater for electric vehicles. Background Technology

[0002] With increasing global attention to environmental protection and energy efficiency, electric vehicles are gradually becoming an important means of transportation to replace traditional fuel vehicles. Electric vehicles are gradually entering the vision of consumers due to their advantages such as zero emissions, low noise, and high efficiency. However, the performance of electric vehicles in cold climates still faces certain challenges. In particular, in low-temperature environments, the energy release efficiency of the battery will decrease, the demand for in-vehicle heating will increase, and the driving range will decrease.

[0003] Traditional internal combustion engine vehicles use engine waste heat to heat the interior, while electric vehicles lack this heat source and therefore require an additional heating system. As a common technical solution for electric vehicle heating systems, PTC electric heaters are widely used in the field of electric vehicle heating due to their high efficiency, safety, and precise temperature control.

[0004] However, PTC electric heaters currently on the market are difficult to disassemble during use, and even if they can be disassembled, it is impossible to clean their surface. Therefore, the current situation of this device is that disassembly is troublesome and cleaning is also quite troublesome, especially cleaning the gap between the two heating plates. It should be noted that if the surface dust can be wiped away by the user, the gap and the bottom are particularly difficult to clean.

[0005] Therefore, we propose a PTC electric heater for electric vehicles that is easy to disassemble and clean. Utility Model Content

[0006] To overcome the shortcomings of existing technologies and solve the problems of cumbersome disassembly and cleaning of existing devices, especially the difficulty in cleaning the gap between the two heating plates, a PTC electric heater for electric vehicles is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The electric vehicle PTC electric heater of this utility model includes a placement box, a dust removal groove is opened on both sides of the bottom of the placement box, a movable limiting groove is also opened on both sides of the bottom of the placement box, a rotating half gear is connected through the interior of the movable limiting groove, a pressing and filling sealing plate is fixedly snapped to the top of the placement box, a fixed clamping plate is movably connected inside the placement box, a heating plate is installed between the two fixed clamping plates, the pressing and filling sealing plate is used to limit the fixed installation of the fixed clamping plate, and the pressing and filling sealing plate also assists the fixed clamping plate in fixing the heating plate.

[0008] Preferably, the opening length of the movable limiting groove is equal to the longitudinal length of the inner wall of the placement box, and the opening length of the dust removal groove is equal to the transverse length of the inner wall of the placement box, thereby ensuring the cleaning distance and cleaning effect when the device is in use.

[0009] Preferably, a reset and fixing groove is installed at the bottom of the inner cavity of the placement box, a cleaning shaft is connected through the two rotating half gears, a cleaning block is movably connected to the surface of the reset and fixing groove, an air blower is installed between the two cleaning blocks, and a gathering groove is opened at the front end of the cleaning block. The gathering groove and the cleaning shaft are engaged to assist the winding of the cleaning shaft rotation, ensuring the cleaning efficiency in the gap between the two heating plates.

[0010] Preferably, the cleaning block has a trapezoidal cross-sectional shape, is made of a soft material, and has a removable cleaning film on its surface. The removable end of the cleaning film is located outside the dust removal groove, thereby ensuring the cleaning effect of the cleaning block itself.

[0011] Preferably, the pressing and filling sealing plate is an irregularly shaped structure design, and a connecting spring is connected between the two fixing plates. The surface of the connecting spring is fitted with a rubber ring to increase the friction between the connecting spring and the placement box. A groove matching the installation of the connecting spring is opened on one side of the inner wall of the placement box, and the pressing and filling sealing plate is also matched with the groove. This arrangement ensures the convenience of the fixing plates during the connection process.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides a PTC electric heater for electric vehicles. By setting up a cleaning shaft, a fixing plate and other related mechanisms, it eliminates the need for bolt and screw connections and improves the overall disassembly efficiency of the device with a tenon and mortise connection structure. At the same time, the device can also be used to clean between the two heating plates, thus ensuring the dust removal efficiency of the device. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Fig. 1 This is a perspective view of the present invention;

[0016] Fig. 2 This is a perspective view of the bottom of the inner cavity of the box in this utility model;

[0017] Fig. 3This is a schematic diagram of the connection structure between the press-fit filling sealing plate and the placement box in this utility model.

[0018] Legend:

[0019] 1. Place the housing; 2. Heating plate; 3. Fixing plate; 4. Dust removal groove; 5. Moving limit groove; 6. Rotate half gear; 7. Press and fill sealing plate; 8. Clean shaft; 9. Cleaning block; 10. Reset and fix the bottom groove; 11. Air outlet; 12. Connecting spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Specific implementation examples are given below.

[0022] Please see Figs. 1-3 This utility model provides a PTC electric heater for electric vehicles, including a housing 1. The bottom of the housing 1 has cleaning grooves 4 on both sides, and movable limiting grooves 5 on both sides. A rotating half-gear 6 is connected through the interior of the movable limiting groove 5. A pressing and filling sealing plate 7 is fixedly engaged at the top of the housing 1. A fixing plate 3 is movably connected inside the housing 1. A heating plate 2 is installed between the two fixing plates 3. The pressing and filling sealing plate 7 is used to limit the fixed installation of the fixing plate 3, and also assists the fixing plate 3 in fixing the heating plate 2.

[0023] In this embodiment, we innovatively save all connecting parts such as screws, nuts, and bolts, and everything is connected by mortise and tenon joints. It should be noted that the interior of the housing 1 still has independent space despite the central opening. The fixing plate 3 is installed inside the housing 1. It can be seen that the pressing and filling sealing plate 7 is used to support and abut against the fixing plate 3 and the heating plate 2, thereby assisting in their fixation. The opening of the dust cleaning groove 4 facilitates the dumping of dust, thereby ensuring that too much dust does not accumulate at the bottom of the heating plate 2 when it is cleaned, thus ensuring the effectiveness of the device.

[0024] Reference Figs. 1-3 The opening length of the movable limiting groove 5 is equal to the longitudinal length of the inner wall of the placement box 1, and the opening length of the dust removal groove 4 is equal to the transverse length of the inner wall of the placement box 1.

[0025] In this embodiment, by setting it up in this way, it can be ensured that the moving distance of the rotating half gear 6 can be limited by the moving limit groove 5, and the cleaning effect of the rotating half gear 6 when rolling can be maximized, while avoiding the problem of dust accumulation inside the device during use.

[0026] Reference Figs. 1-3 A reset and fixing groove 10 is installed at the bottom of the inner cavity of the housing 1. A cleaning shaft 8 is connected through the two rotating half gears 6. A cleaning block 9 is movably connected to the surface of the reset and fixing groove 10. An air outlet 11 is installed between the two cleaning blocks 9. A winding groove is opened at the front end of the cleaning block 9. The winding groove and the cleaning shaft 8 are engaged to assist the winding of the cleaning shaft 8.

[0027] In this embodiment, during use, rotating the half-gear 6 drives the cleaning shaft 8 to rotate simultaneously. When the half-gear 6 rotates, its front end engages inside the moving limiting groove 5. Therefore, the half-gear 6 drives the cleaning shaft 8 to rotate and move. As the cleaning shaft 8 rotates and moves, it pulls the cleaning block 9 up. The cleaning block 9 is positioned between the two heating plates 2. When the half-gear 6 drives the cleaning shaft 8 to move, due to the structural limitations of the cleaning block 9, the winding height of the cleaning block 9 allows it to touch the space between the two heating plates 2. This arrangement scrapes the heating plates 2, thus assisting the user in cleaning them.

[0028] Reference Figs. 1-3 The cleaning block 9 has a trapezoidal cross-sectional shape and is made of a soft material. The surface of the cleaning block 9 is provided with a removable cleaning film, and the detachable end of the cleaning film is located outside the dust removal tank 4.

[0029] In this embodiment, considering the problem that the cleaning card block 9 will inevitably get dusty during use, in order to assist the cleaning effect of the cleaning card block 9 itself, we designed a cleaning film and related structures on the surface of the cleaning card block 9, referring to the structure of the goggles of a motocross helmet. When cleaning is needed, the thin film on its surface can be peeled off to expose the new film underneath, thereby ensuring the cleanliness of the cleaning card block 9 itself.

[0030] Reference Figs. 1-3 The pressing and filling sealing plate 7 is designed with an irregular shape. A connecting spring 12 is connected between the two fixing plates 3. A rubber ring is fitted on the surface of the connecting spring 12 to increase the friction between the connecting spring 12 and the placement box 1. A groove matching the installation of the connecting spring 12 is opened on one side of the inner wall of the placement box 1. The pressing and filling sealing plate 7 is also matched with this groove.

[0031] In this embodiment, with this configuration, the device can effectively fix the connection between the fixing plate 3 and the placement box 1 during use by using the pressing and filling sealing plate 7. It should be noted that the pressing and filling sealing plate 7 is made of a soft, expandable material, thereby ensuring that the pressing and filling sealing plate 7 can seal during use and abut against the connection between the placement box 1 and the fixing plate 3. At the same time, in order to increase its constriction friction effect, the side of the pressing and filling sealing plate 7 still covers the outer surface of the placement box 1, thereby strengthening its fixing and adsorption characteristics and ensuring the overall fixing strength of the material.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A PTC electric heater for electric vehicles, characterized in that: The device includes a placement box (1), on both sides of the bottom of the placement box (1) are provided with dust removal grooves (4), and on both sides of the bottom of the placement box (1) are also provided with moving limiting grooves (5). A rotating half gear (6) is connected through the interior of the moving limiting groove (5). A pressing filling sealing plate (7) is fixedly snapped onto the top of the placement box (1). A fixing plate (3) is movably connected inside the placement box (1). A heating plate (2) is installed between the two fixing plates (3). The pressing filling sealing plate (7) is used to limit the fixed installation of the fixing plate (3). The pressing filling sealing plate (7) also assists the fixing plate (3) in fixing the heating plate (2).

2. The electric vehicle PTC heater according to claim 1, characterized in that: The opening length of the movable limiting groove (5) is equal to the longitudinal length of the inner wall of the placement box (1), and the opening length of the ash cleaning groove (4) is equal to the transverse length of the inner wall of the placement box (1).

3. The electric vehicle PTC heater according to claim 2, characterized in that: The bottom of the inner cavity of the placement box (1) is equipped with a reset fixing groove (10), and a cleaning shaft (8) is connected through the two rotating half gears (6). A cleaning block (9) is movably connected to the surface of the reset fixing groove (10), and an air blower (11) is installed between the two cleaning blocks (9). A gathering groove is opened at the front end of the cleaning block (9), and the gathering groove and the cleaning shaft (8) are engaged to assist the winding rotation of the cleaning shaft (8).

4. The electric vehicle PTC heater according to claim 3, characterized in that: The cleaning block (9) has a trapezoidal cross-sectional shape and is made of a soft material. The surface of the cleaning block (9) is provided with a removable cleaning film, and the detachable end of the cleaning film is located outside the dust removal tank (4).

5. The electric vehicle PTC heater according to claim 4, characterized in that: The pressing and filling sealing plate (7) is a non-circular structure design. A connecting spring (12) is connected between the two fixing plates (3). A rubber ring is fitted on the surface of the connecting spring (12) to increase the friction between the connecting spring (12) and the placement box (1).

6. The electric vehicle PTC heater according to claim 5, characterized in that: The inner wall of the placement box (1) is provided with a groove for installing the matching connecting spring (12), and the pressing filling sealing plate (7) is also matched with the groove.

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