Variable-frequency control high-voltage PTC (Positive Temperature Coefficient) heater

Abstract

The utility model discloses a frequency conversion control high voltage PTC heater comprising a heater wiring head part, one end of the heater wiring head part is connected with a heater wiring housing, the inner side of the heater wiring housing is provided with a heat exchange sleeve, and one end of the heater wiring housing opposite to the heater wiring head part is provided with a heater tailstock. A first NTC sensor is arranged at the end, located in the heater wiring outer shell, of the heater wiring head portion, and a second NTC sensor is arranged on the side, right facing the first NTC sensor, of the heater tailstock. The PTC heating body can conduct heat conveniently through the heat exchange sleeve, the structural stability of the PTC heating body can be enhanced, wiring can be completed only by correspondingly inserting a wiring plug into the temperature detection interface and the power interface, and the temperature generated by the PTC heating body can be monitored and fed back in real time through the first NTC sensor and the second NTC sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC heaters, in particular to a variable frequency controlled high-voltage PTC heater. Background Art

[0002] In the field of new energy vehicle technology, electric vehicles generally use power battery packs as their power source, usually lithium battery packs. Unlike fuel vehicles that rely on their own fuel engines to generate heat sources, electric vehicles do not have their own power devices to generate heat sources, so they need to use heaters to provide heat sources. Chinese patent CN220545154U discloses a PTC heater, including a heating component, a thermostat, a fuse, a first bracket and a second bracket. The first bracket includes a detachably connected base and a cover plate. The base is spaced apart with a first mounting groove, a second mounting groove and a third mounting groove. The first mounting groove is used for one end of the heating component to extend into, the second mounting groove is used to install the thermostat, and the third mounting groove is used to install the fuse. A first positioning block and a second positioning block are provided on the side of the cover plate facing the base. The first positioning block is used to abut the thermostat, and the second positioning block is used to abut the fuse; the second bracket is provided at the other end of the heating component. The protective cover and base wrap and protect the incoming and outgoing terminals, thermostat and fuse of the heating component, preventing the influence of foreign objects on the incoming and outgoing terminals, thermostat and fuse of the heating component, thereby increasing the service life of the incoming and outgoing terminals, thermostat and fuse of the heating component, and increasing the life of this application.

[0003] The above-mentioned prior art has the following shortcomings: The heat exchanger is connected and fixed by a first bracket and a second bracket. However, due to the hollow structure of the heat exchanger itself, it cannot effectively protect the heating element from external impact. Moreover, the leads on the heating element need to pass through the first bracket before being connected externally, resulting in poor integration and inconvenience. Therefore, a variable frequency controlled high-voltage PTC heater is provided to address the above problems. Utility Model Content

[0004] In order to solve the problems in the above background technology, the technical solution adopted by the present invention to solve the technical problems is: a variable frequency controlled high-voltage PTC heater, which includes: a heater wiring head, one end of the heater wiring head is connected to a heater wiring shell, a heat exchange sleeve is provided on the inside of the heater wiring shell, a heater tail seat is provided at the end of the heater wiring shell opposite to the heater wiring head, a first NTC sensor is provided at one end of the heater wiring head located inside the heater wiring shell, and a second NTC sensor is provided on the side of the heater tail seat facing the first NTC sensor.

[0005] As an optimal technical solution of the present invention, a PTC heating element is passed through the inside of the heat exchange sleeve, and there are several PTC heating elements. A first limiting groove is provided at one end of the heater wiring head facing the PTC heating element, and one end of the PTC heating element is inserted into the first limiting groove.

[0006] As a preferred technical solution of the present invention, a second limiting groove is provided on the tail seat of the heater facing one end of the PTC heating element, and one end of the PTC heating element is inserted into the second limiting groove.

[0007] As a preferred technical solution of the present invention, the heater tail seat is fixedly connected to a tail cover on the opposite side of the PTC heating element by screws, and the heater tail seat and the heater wiring head are both plugged into the two ends of the heater wiring shell.

[0008] As a preferred technical solution of the present invention, the heater wiring housing includes a bottom shell and an upper shell, the bottom shell and the upper shell are matched and docked, and the bottom shell and the upper shell are both made of stainless steel.

[0009] As an optimal technical solution of the present invention, the two ends of the bottom shell are fixedly connected to the heater wiring head and the heater tail seat by screws, and the two ends of the upper shell are fixedly connected to the heater wiring head and the heater tail seat by screws.

[0010] As an optimal technical solution of the present invention, a power interface is provided on one side of the heater wiring head, a temperature detection interface is provided on the side of the power interface of the heater wiring head, and a heat dissipation structure is provided on the outer side of one end of the heater wiring head close to the temperature detection interface.

[0011] The utility model has the following advantages: the utility model facilitates effective protection of the PTC heating element through the upper shell and the bottom shell, and the heat exchange sleeve not only facilitates heat conduction of the PTC heating element, but also enhances the structural stability of the PTC heating element;

[0012] Simply insert the wiring plug into the temperature detection interface and power interface to complete the wiring, which is convenient and quick;

[0013] The temperature generated by the PTC heating element can be monitored and fed back in real time through the first NTC sensor and the second NTC sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a preferred embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the split structure of the preferred embodiment of the utility model;

[0016] Figure 3This is a schematic diagram of the heater tailstock structure of a preferred embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the split structure of the heater tailstock and the cover plate in the preferred embodiment of the utility model;

[0018] Figure 5 This is a schematic structural diagram of a heater wiring head according to a preferred embodiment of the present invention.

[0019] Explanation of the accompanying symbols: 1. Heater wiring head; 2. Temperature detection interface; 3. Power interface; 4. Heat dissipation structure; 5. First limiting groove; 6. First NTC sensor; 7. Bottom shell; 8. Upper shell; 9. Heat exchange sleeve; 10. PTC heating element; 11. Heater tail seat; 12. Tail cover; 13. Second limiting groove; 14. Second NTC sensor. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Please refer to Figure 1-Figure 5The utility model is a variable frequency controlled high-voltage PTC heater, comprising: a heater wiring head 1, one end of the heater wiring head 1 is connected to a heater wiring shell, a heat exchange sleeve 9 is provided inside the heater wiring shell, a heater tail seat 11 is provided at the end of the heater wiring shell opposite to the heater wiring head 1, a first NTC sensor 6 is provided at one end of the heater wiring head 1 located inside the heater wiring shell, and a second NTC sensor 14 is provided on the side of the heater tail seat 11 facing the first NTC sensor 6.

[0024] Combine Figure 2 and Figure 5 As shown, the heat exchange sleeve 9 is provided with a PTC heating element 10, and the number of PTC heating elements 10 is set to be several. The heater terminal head 1 is provided with a first limiting groove 5 at one end facing the PTC heating element 10, and the first limiting groove 5 is inserted into one end of the PTC heating element 10. Figure 3 and Figure 4 As shown, the heater tail seat 11 is provided with a second limiting groove 13 at one end facing the PTC heating element 10, and one end of the PTC heating element 10 is inserted into the second limiting groove 13, so as to fix the two ends of the PTC heating element 10. The heater tail seat 11 is fixedly connected to the tail cover 12 on the opposite side of the PTC heating element 10 by screws, and the heater tail seat 11 and the heater wiring head 1 are both inserted into the two ends of the heater wiring shell.

[0025] Among them, the heater wiring shell includes a bottom shell 7 and an upper shell 8, the bottom shell 7 and the upper shell 8 are matched and docked, the bottom shell 7 and the upper shell 8 are both made of stainless steel, the two ends of the bottom shell 7 are fixedly connected to the heater wiring head 1 and the heater tail seat 11 by screws, and the two ends of the upper shell 8 are fixedly connected to the heater wiring head 1 and the heater tail seat 11 by screws, a power interface 3 is provided on one side of the heater wiring head 1, and a temperature detection interface 2 is provided on the side of the power interface 3 of the heater wiring head 1, and a heat dissipation structure 4 is provided on the outer side of the end of the heater wiring head 1 close to the temperature detection interface 2, and the heat dissipation structure 4 facilitates heat dissipation inside the heater wiring head 1.

[0026] Specifically, the utility model integrates the heater wiring head 1, the bottom shell 7, the upper shell 8, the heat exchange sleeve 9, the PTC heater 10, and the heater tail seat 11 into one, and then facilitates effective physical protection of the PTC heater 10 through the upper shell 8 and the bottom shell 7. At the same time, the heat exchange sleeve 9 not only facilitates heat conduction of the PTC heater 10, but also is sleeved on the outside of the PTC heater 10, which can enhance the structural stability of the PTC heater 10. When wiring, it is only necessary to insert the wiring plug into the temperature detection interface 2 and the power interface 3 accordingly to complete the wiring, which is convenient and quick, and the temperature generated by the PTC heater 10 can be monitored and fed back in real time through the first NTC sensor 6 and the second NTC sensor 14.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0028] Other parts of the present invention that are not described in detail belong to the prior art and will not be described in detail here.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable frequency controlled high voltage PTC heater, characterized in that: include: A heater wiring head (1), one end of the heater wiring head (1) is connected to a heater wiring housing, a heat exchange sleeve (9) is provided inside the heater wiring housing, a heater tail seat (11) is provided at the end of the heater wiring housing opposite to the heater wiring head (1), a first NTC sensor (6) is provided at one end of the heater wiring head (1) located inside the heater wiring housing, and a second NTC sensor (14) is provided on the side of the heater tail seat (11) facing the first NTC sensor (6).

2. A variable frequency controlled high voltage PTC heater according to claim 1, characterized in that: A PTC heating element (10) is passed through the interior of the heat exchange sleeve (9), and the number of the PTC heating elements (10) is set to be several. A first limiting groove (5) is provided on one end of the heater wiring head (1) facing the PTC heating element (10), and one end of the PTC heating element (10) is inserted into the interior of the first limiting groove (5).

3. The variable frequency controlled high voltage PTC heater according to claim 1, characterized in that: The heater tail seat (11) is provided with a second limiting groove (13) at one end facing the PTC heating element (10), and one end of the PTC heating element (10) is inserted into the second limiting groove (13).

4. The variable frequency controlled high voltage PTC heater according to claim 1, characterized in that: The heater tail seat (11) is fixedly connected to a tail cover (12) on the side opposite to the PTC heating element (10) by screws, and the heater tail seat (11) and the heater wiring head (1) are both plugged into the two ends of the heater wiring shell.

5. The variable frequency controlled high voltage PTC heater according to claim 1, characterized in that: The heater wiring housing comprises a bottom shell (7) and an upper shell (8), wherein the bottom shell (7) and the upper shell (8) are matched and docked, and both the bottom shell (7) and the upper shell (8) are made of stainless steel.

6. The variable frequency controlled high voltage PTC heater according to claim 5, characterized in that: The two ends of the bottom shell (7) are respectively fixedly connected to the heater wiring head (1) and the heater tail seat (11) by screws, and the two ends of the upper shell (8) are respectively fixedly connected to the heater wiring head (1) and the heater tail seat (11) by screws.

7. The variable frequency controlled high voltage PTC heater according to claim 1, characterized in that: A power interface (3) is provided on one side of the heater wiring head (1), a temperature detection interface (2) is provided on the heater wiring head (1) located on one side of the power interface (3), and a heat dissipation structure (4) is provided on the outer side of one end of the heater wiring head (1) close to the temperature detection interface (2).

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