Ptc heater for energy storage products

Abstract

The utility model discloses a kind of PTC heater for energy storage product, including water pipe and PTC heater is equipped with water tank on water pipe, water pipe is divided into two sections, it is respectively set on the opposite two ends of water tank and is integrally connected with water tank, the lumen of water pipe is communicated with the inner chamber of water tank, PTC heater includes core seat, PTC heating core, core seat includes at least one with the seat body of the PTC core cavity of plate, PTC heating core is set in PTC core cavity, PTC heating core is wrapped with heat-conducting silica gel sheet, outer core seat is set in water tank, PTC core cavity has two heat-conducting surfaces, heat-conducting surface is parallel with the water flow direction of water tank.Compared with prior art, by setting PTC heater in water tank, make two heat-conducting surfaces of PTC heater contact with medium, give full play to heat dissipation performance, PTC heating core is wrapped by heat-conducting silica gel sheet, realize insulation, to improve the performance of product.

Description

Technical Field

[0001] This utility model relates to a PTC heater, and more particularly to a PTC heater for energy storage products. Background Technology

[0002] With the widespread application of PTC heaters, they are also increasingly used in energy storage products. However, there are three common structures for PTC heaters used in existing energy storage products: the first type is a PTC heater that is mainly made of aluminum profile and integrated into one piece (such as...). Figure 1 As shown); the second type is a stainless steel (inner tube welded pipe joint) structure (such as...). Figure 2 The third type is a water tank type with welded inlet and outlet pipes made of harmonica aluminum tubing. Figure 3 (As shown); the problems with the three structural forms during use are as follows:

[0003] The first two structures suffer from single-sided heating and poor heat dissipation on the non-liquid contact surface, resulting in low power output of a single PTC chip. To achieve the same power output, more PTC heating elements are often required, leading to high product costs, excessive size, and limited adaptability.

[0004] The third type requires welding of the harmonica aluminum tube to the water tank, and the water tank also needs to be welded to the inlet and outlet pipes. This results in unreliable welding positions, leading to safety issues such as leakage and electrical leakage during use. Additionally, the high water resistance at high flow rates limits its applicability. Utility Model Content

[0005] The purpose of this invention is to provide a PTC heater for energy storage products to solve the above-mentioned problems.

[0006] To solve the above problems, the present invention adopts the following technical solution: A PTC heater for energy storage products, including a water pipe and a PTC heater. A water tank is provided on the water pipe. The water pipe is divided into two sections, which are respectively set on opposite ends of the water tank and integrally connected to the water tank. The cavity of the water pipe is connected to the inner cavity of the water tank. The PTC heater includes a core seat and a PTC heating core. The core seat includes at least one plate-shaped seat with a PTC core cavity. The PTC heating core is set in the PTC core cavity. The PTC heating core is covered with a thermally conductive silicone sheet. The outer core seat is set in the water tank. The PTC core cavity has two thermally conductive surfaces, which are parallel to the water flow direction of the water tank.

[0007] Furthermore, the heat-conducting surface is perpendicular to the bottom of the water tank.

[0008] Furthermore, the PTC heater also includes a thermally conductive silicone sheet, which is wrapped around the PTC heating core.

[0009] Furthermore, the PTC heater also includes a U-shaped wedge, which is disposed between the thermally conductive silicone sheet and the thermally conductive surface.

[0010] Furthermore, the seat body is provided in at least two parts, and a gap is provided between the two seats body.

[0011] Furthermore, the PTC heater also includes a bracket, which has a socket for fixing the PTC heating core. The electrode contacts on the PTC heating core pass through the socket and are electrically connected to the circuit board on the bracket.

[0012] Furthermore, the PTC heater also includes a temperature controller and / or a fuse.

[0013] Furthermore, one end of the water tank has an opening, and an upper cover is provided on the opening, with the upper cover and the opening being sealed together.

[0014] Furthermore, the opening has a first extension edge, the core seat has a second extension edge, the core seat abuts against the first extension edge via the second extension edge, the top cover abuts against the second extension edge, and the three are fastened together by screws. A first sealing ring is provided between the first extension edge and the second extension edge, and a second sealing ring is provided between the second extension edge and the top cover.

[0015] Furthermore, the upper cover is provided with a protruding conduit, the outer surface of the conduit is provided with threads, the conduit is provided with a threaded cap with a threaded connection, the threaded cap is provided with a through hole, a rubber stopper is provided in the conduit, the rubber stopper is provided with a wire passage hole, the circuit board and the temperature controller cables pass through the wire passage hole on the rubber stopper and extend out of the upper cover, and the wire passage hole of the rubber stopper is sealed with the cables.

[0016] Compared with the prior art, this utility model improves the product's performance by placing the PTC heater in the water tank, ensuring that both heat-conducting surfaces of the PTC heater are in contact with the medium, and by wrapping the PTC heating core with a thermally conductive silicone sheet for insulation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first PTC heater in the prior art.

[0018] Figure 2 This is a schematic diagram of the structure of the second type of PTC heater in the prior art.

[0019] Figure 3 This is a schematic diagram of the structure of the third type of PTC heater in the prior art.

[0020] Figure 4 This is a schematic diagram of the external structure of this utility model.

[0021] Figure 5This is an exploded structural diagram of the present invention.

[0022] Figure 6 This is a top view of the present invention.

[0023] Figure 7 yes Figure 6 A sectional view along the A-A direction.

[0024] Figure 8 yes Figure 6 A cross-sectional view along the B-B direction. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 4 to 8 As shown, this utility model discloses a PTC heater for energy storage products, comprising two water pipes 1, a water tank 3, and a PTC heater 2, wherein:

[0027] The water tank 3 is a rectangular hollow structure, including four large faces and two side faces. The water pipes 1 are respectively set on the two side faces and are integrally connected to the side faces. The side faces are provided with holes that communicate with the water pipes 1, so that one water pipe 1 can enter and the other water pipe 1 can exit. One of the large faces of the water tank 3 is an open opening 31, which is provided with an upper cover 17.

[0028] The PTC heater 2 includes a core seat 4 made of aluminum material, which can be inserted into the inner cavity of the water tank 3 through the opening 31. The core seat 4 has two or more seats 42, which are plate-shaped and have a PTC core cavity 41 inside. The PTC core cavity 41 has two heat-conducting surfaces 411, which are parallel to the water flow direction of the water tank 3. The PTC heating core 5 is disposed in the PTC core cavity 41, and the two heating surfaces of the PTC heating core 5 are respectively opposite to the two heat-conducting surfaces 411, so that the medium entering the water tank 3 can fully contact the two heating surfaces of the PTC heating core 5. The two seats 42 are spaced apart and their arrangement direction is perpendicular to the water flow direction of the water tank 3.

[0029] The PTC heating core 5 uses existing technology and includes a PTC heating element 51 and an electrode plate 52.

[0030] In this invention, the heat-conducting surface 411 is perpendicular to the bottom of the water tank 3 (e.g., Figure 8 (as shown), to further achieve full contact with the medium.

[0031] like Figure 8As shown, a thermally conductive silicone sheet 6 is wrapped around the PTC heating core 5. The thermally conductive silicone sheet 6 covers the electrode sheet 52 to achieve insulation and prevent the base 42 from becoming charged. At the same time, the thermally conductive silicone sheet has a better heat dissipation effect than the traditional optical film (PI, polyimide film) and improves the thermal conductivity. The power of a single PTC heating element 51 can be increased by about 50%.

[0032] In this invention, the core holder 4 is made of aluminum to improve heat conduction.

[0033] like Figure 8 As shown, a U-shaped wedge 7 is provided between the thermally conductive silicone sheet 6 and the thermally conductive surface 411. The thermally conductive silicone sheet 6 and the PTC heating core 5 are disposed in the groove of the wedge 7 to achieve a tight fit between the heating surface, the wedge 7 and the thermally conductive surface 411, which is beneficial for heat conduction.

[0034] like Figure 5 , Figure 7 as well as Figure 8 As shown, a bracket 8 is provided on the core base 4. The bracket 8 has a socket 81 for fixing the PTC heating core 5. The number of sockets 81 is equal to the number of electrode plates of the PTC heating core 5, so as to fix the PTC heating core 5 in the core base 4. Above the bracket 8, there is also a thermostat 10, a fuse 16 and a circuit board 9. The circuit board 9 is used to electrically connect with the electrode plates 52 of the PTC heating core 5. The cables of the thermostat 10, the fuse 16 and the circuit board 9 are led out to the outside of the water tank 3 and electrically connected to an external controller to control the PTC heating core 5. They can also be connected in series in the power supply circuit to disconnect the power supply to the heating core in case of overheating.

[0035] like Figure 8 As shown, an inner cavity is provided on the upper cover 17, and the circuit board 9 is disposed in the inner cavity. The connection between the upper cover 17 and the water tank 3 is achieved by the following structure: a first extension edge 32 is provided on the edge of the opening 31, and a second extension edge 43 is provided on the edge of the core seat 4. The core seat 4 abuts against the first extension edge 32 through the second extension edge 43. The edge of the upper cover 17 abuts against the second extension edge 43. The first extension edge 32, the second extension edge 43 and the upper cover 17 are fastened together by screws. A first sealing ring 11 is provided between the first extension edge 32 and the second extension edge 43, and a second sealing ring 12 is provided between the second extension edge 43 and the upper cover 17 to achieve waterproof sealing.

[0036] like Figure 5 and Figure 7As shown, the upper cover 17 has a protruding conduit 13, which is integrally formed with the upper cover 17. The orientation of the conduit 13 can be set according to actual needs and is not specifically limited here. The outer surface of the conduit 13 is threaded, and the conduit 13 is provided with a threaded cap 14 with threaded connection. The threaded cap 14 has a through hole, and a rubber plug 15 is provided in the conduit 13. The rubber plug 15 has a wire passage hole. The cables of the circuit board 9 and the thermostat 10 pass through the wire passage hole on the rubber plug 15 and extend out of the upper cover. The wire passage hole of the rubber plug 15 is sealed with the cable to achieve waterproofing.

[0037] This invention reduces product costs, improves product performance, and achieves adaptability with a smaller size. The water tank and core base are manufactured using cast aluminum, and thermally conductive silicone sheets provide insulation. Each PTC heating core has two heating surfaces that are in full contact with the liquid. Furthermore, the thermally conductive silicone sheets offer better heat dissipation than optical films, increasing the power output of a single PTC by approximately 50%. It also results in low water resistance at high flow rates and avoids sealing issues caused by poor welding.

Claims

1. A PTC heater for energy storage products, comprising a water pipe (1) and a PTC heater (2), characterized in that: A water tank (3) is provided on the water pipe (1). The water pipe (1) is divided into two sections, which are respectively set on the opposite ends of the water tank (3) and are integrally connected to the water tank (3). The cavity of the water pipe (1) is connected to the inner cavity of the water tank (3). The PTC heater (2) includes a core seat (4) and a PTC heating core (5). The core seat (4) includes at least one plate-shaped seat (42) with a PTC core cavity (41). The PTC heating core (5) is set in the PTC core cavity (41). The PTC heating core (5) is wrapped with a thermally conductive silicone sheet (6). The outer core seat (4) is set in the water tank (3). The PTC core cavity (41) has two thermally conductive surfaces, which are parallel to the water flow direction of the water tank (3).

2. The PTC heater for energy storage products according to claim 1, characterized in that: The heat-conducting surface is perpendicular to the bottom of the water tank (3).

3. The PTC heater for energy storage products according to claim 2, characterized in that: The PTC heater (2) also includes a thermally conductive silicone sheet (6), which is wrapped around the PTC heating core (5).

4. The PTC heater for energy storage products according to claim 3, characterized in that: The PTC heater (2) also includes a U-shaped wedge (7), which is disposed between the thermally conductive silicone sheet (6) and the thermally conductive surface.

5. The PTC heater for energy storage products according to claim 4, characterized in that: The seat (42) is provided in at least two, and a gap is provided between the two seats (42).

6. The PTC heater for energy storage products according to claim 5, characterized in that: The PTC heater (2) also includes a bracket (8), which has a socket (81) for fixing the PTC heating core (5) relatively. The electrode contacts on the PTC heating core (5) pass through the socket (81) and are electrically connected to the circuit board (9) on the bracket (8).

7. The PTC heater for energy storage products according to claim 6, characterized in that: The PTC heater (2) also includes a temperature controller (10) and / or a fuse (16).

8. The PTC heater for energy storage products according to any one of claims 1-7, characterized in that: The water tank (3) has an opening (31) at one end, and an upper cover (17) is provided on the opening (31), and the upper cover (17) and the opening (31) are sealed together.

9. The PTC heater for energy storage products according to claim 8, characterized in that: The opening (31) has a first extension edge (32) on its edge, and the core seat (4) has a second extension edge (43) on its edge. The core seat (4) abuts against the first extension edge (32) through the second extension edge (43). The edge of the top cover (17) abuts against the second extension edge (43), and the three are fastened together by screws. A first sealing ring (11) is provided between the first extension edge (32) and the second extension edge (43), and a second sealing ring (12) is provided between the second extension edge (43) and the top cover (17).

10. The PTC heater for energy storage products according to claim 9, characterized in that: The upper cover (17) is provided with a protruding conduit (13), the outer surface of the conduit (13) is provided with threads, the conduit (13) is provided with a threaded cap (14) with threaded connection, the threaded cap (14) is provided with a through hole, a rubber plug (15) is provided in the conduit (13), the rubber plug (15) is provided with a wire hole, the cables of the circuit board (9) and the thermostat (10) pass through the wire hole on the rubber plug (15) and extend out of the upper cover, and the wire hole of the rubber plug (15) is sealed with the cable.

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