PTC (Positive Temperature Coefficient) heating body with high heat exchange efficiency

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) heating bodies, in particular to a PTC heating body with high heat exchange efficiency, which comprises a shell, electrode plates are arranged in the shell, the opposite surfaces of the electrode plates are fixedly connected with limiting strips, limiting grooves are formed in the upper inner wall and the lower inner wall of the shell, the limiting strips are positioned in the limiting grooves, heating sheets are arranged in the two electrode plates, and the heating sheets are arranged in the heating sheets. Positioning blocks are fixedly connected to the upper surface and the lower surface of the heating sheet, a hollow groove is formed in the heating sheet, heat dissipation grooves are formed in the outer walls of the two sides of the heating sheet, positioning grooves are formed in the two ends of the two electrode sheets, the positioning blocks are located in the positioning grooves, and communicating grooves are formed in the inner walls of the two sides of the shell; the multiple communicating grooves correspond to the multiple heat dissipation grooves in a one-to-one mode, transverse exhaust grooves are formed in the outer walls of the two ends of the shell, the number of the transverse exhaust grooves is two, and the transverse exhaust grooves communicate with the multiple communicating grooves. The contact area with air is increased, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of PTC heating elements, in particular to a PTC heating element with high heat exchange efficiency. Background Art

[0002] PTC heating elements, also known as PTC heaters, are composed of PTC ceramic heating elements and aluminum tubes. This type of PTC heating element offers low thermal resistance and high heat transfer efficiency, making it an automatic, energy-efficient electric heater with a constant temperature. Its outstanding safety feature is that it will not produce the surface "reddening" phenomenon seen with electric heating tube heaters, which can pose safety risks such as burns or fires, under any application.

[0003] The interior of existing PTC heaters is usually corrugated. When the heater generates heat, the internal heat is discharged through the gaps in the corrugations. The heat exchange space is limited and the heat cannot be discharged immediately, resulting in low heat exchange efficiency. After long-term use, the heating performance of the PTC heater will decrease, which will affect the use of the entire PTC heater. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to provide a PTC heating element with high heat exchange efficiency.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a PTC heating element with high heat exchange efficiency, comprising a shell, an electrode sheet is arranged inside the shell, and the number of the electrode sheets is two, the opposite back surfaces of the two electrode sheets are fixedly connected to a limiting strip, and the number of the limiting strips is two respectively, the upper and lower inner walls of the shell are provided with a limiting groove, and the number of the limiting grooves is two respectively, the limiting strip is located inside the limiting groove, a heating sheet is installed inside the two electrode sheets, the upper and lower surfaces of the heating sheet are fixedly connected to a positioning block, and the number of the positioning blocks is two respectively, a hollow groove is opened inside the heating sheet, and heat dissipation grooves are opened on both sides of the outer wall of the heating sheet, and the number of heat dissipation grooves is multiple, both ends of the two electrode sheets are provided with a positioning groove, and the number of the positioning grooves is two respectively, the positioning block is located inside the positioning groove, the inner walls of both sides of the shell are provided with a connecting groove, and the number of the connecting grooves is multiple, and the multiple connecting grooves correspond one-to-one to the positions of the multiple heat dissipation grooves, and the outer walls of both ends of the shell are provided with a transverse exhaust groove, and the number of the transverse exhaust grooves is two respectively, and the transverse exhaust groove is connected to the multiple connecting grooves.

[0006] As a further description of the above technical solution:

[0007] The left ends of the two electrode sheets are fixedly connected to a fixing block, the inner wall bottom of the fixing block is fixedly connected to a spring, and there are multiple springs, and the tops of the multiple springs are fixedly connected to a locking block.

[0008] As a further description of the above technical solution:

[0009] The right ends of the two electrode sheets are both fixedly connected with a wedge block, and the number of the wedge blocks is two.

[0010] As a further description of the above technical solution:

[0011] The upper and lower inner walls of the shell are both provided with rectangular grooves, and there are multiple rectangular grooves. The outer walls at both ends of the shell are both provided with longitudinal exhaust grooves, and there are two longitudinal exhaust grooves respectively. The longitudinal exhaust grooves are connected to the multiple rectangular grooves.

[0012] As a further description of the above technical solution:

[0013] The rear outer wall of the shell is provided with two connecting grooves, and the front outer wall of the shell is fixedly connected with two connecting strips, which respectively correspond to the positions of the two connecting grooves.

[0014] As a further description of the above technical solution:

[0015] The right outer walls of the two electrode sheets are both fixedly connected with a conductive sheet, and the conductive sheet is located in the middle of the two wedge-shaped blocks.

[0016] The utility model has the following beneficial effects:

[0017] The two electrode sheets are buckled on the upper and lower outer walls of the heating sheet respectively. At this time, the two positioning blocks connecting the upper and lower outer walls of the heating sheet are respectively located inside the positioning grooves opened at both ends of the two electrode sheets. The two limit bars connected to the back faces of the two electrode sheets are aligned with the limit grooves opened on the upper and lower inner walls of the shell, and the two electrode sheets are inserted into the interior of the shell, so that the heating sheet follows the two electrode sheets into the interior of the shell, and the multiple heat dissipation grooves opened on the outer wall of the heating sheet correspond to the multiple connecting grooves opened on the inner wall of the shell, so that the heat generated by the heating sheet when in use passes through the multiple connecting grooves and is finally discharged through the horizontal exhaust grooves. In addition, a hollow groove is opened inside the heating sheet, which increases the contact area with the air and improves the heat exchange efficiency. The existing PTC heater is usually corrugated inside. When the heater heats up, the internal heat is discharged through the gaps in the corrugations. The heat exchange space is limited and the heat cannot be discharged immediately, which leads to low heat exchange efficiency. After long-term use, the heating performance of the PTC heater will be reduced, which will affect the use of the entire PTC heater. The PTC heater has a large contact surface with the air and high heat exchange efficiency, which extends the service life of the entire PTC heater.

[0018] By connecting a fixing block at the left end of the two electrode sheets, connecting multiple springs to the bottom of the inner wall of the fixing block, and connecting locking blocks to the tops of the multiple springs, when the two electrode sheets are respectively inserted into the interior of the shell, the two locking blocks are retracted into the fixing blocks. At this time, the multiple springs are in a compressed state. When the fixing block extends from the left side of the interior of the shell, the multiple springs rebound to return the locking block to its position. The locking block and the wedge block cooperate to fix the electrode sheet inside the shell without shaking. Finally, the conductive sheets connected to the right outer walls of the two electrode sheets are energized to make the heating sheet heat up, and two connecting grooves are opened on the right outer wall of the shell, and two connecting strips are connected on the left outer wall of the shell, so that multiple shells can be spliced with each other, and multiple rectangular grooves are opened on the upper and lower inner walls of the shell 1, and the multiple rectangular grooves are connected to the longitudinal exhaust grooves, which increase the contact surface between the heating sheet and the air and improve the heat exchange performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a PTC heating element with high heat exchange efficiency proposed by the present invention from a first perspective;

[0020] Figure 2 This is a schematic diagram of the shell structure of a PTC heating element with high heat exchange efficiency proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the electrode structure of a PTC heating element with high heat exchange efficiency proposed by the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of a PTC heating element with high heat exchange efficiency proposed by the present invention;

[0023] Figure 5 The utility model proposes a PTC heating element with high heat exchange efficiency. Figure 4 A magnified schematic diagram of the structure;

[0024] Figure 6 This is a schematic diagram of the connecting groove structure of a PTC heating element with high heat exchange efficiency proposed by the utility model.

[0025] Legend:

[0026] 1. Housing; 2. Electrode sheet; 3. Limiting strip; 4. Limiting groove; 5. Heat generating sheet; 6. Positioning block; 7. Hollow groove; 8. Heat dissipation groove; 9. Positioning groove; 10. Connecting groove; 11. Horizontal exhaust groove; 12. Fixing block; 13. Spring; 14. Locking block; 15. Wedge block; 16. Rectangular groove; 17. Longitudinal exhaust groove; 18. Connecting groove; 19. Connecting strip; 20. Conductive sheet. DETAILED DESCRIPTION

[0027] Reference Figure 1-6 The utility model provides a PTC heating element with high heat exchange efficiency: it includes a shell 1, an electrode sheet 2 is arranged inside the shell 1, and the number of the electrode sheets 2 is two, the opposite back surfaces of the two electrode sheets 2 are fixedly connected to the limiting strips 3, and the number of the limiting strips 3 is two, the upper and lower inner walls of the shell 1 are provided with limiting grooves 4, and the number of the limiting grooves 4 is two, the limiting strips 3 are located inside the limiting grooves 4, the inside of the two electrode sheets 2 are provided with heating sheets 5, the upper and lower surfaces of the heating sheets 5 are fixedly connected to positioning blocks 6, and the number of the positioning blocks 6 is two, the inside of the heating sheet 5 is provided with a There is a hollow groove 7, and heat dissipation grooves 8 are provided on the outer walls on both sides of the heating plate 5, and there are multiple heat dissipation grooves 8. Positioning grooves 9 are provided at both ends of the two electrode sheets 2, and there are two positioning grooves 9. The positioning block 6 is located inside the positioning groove 9. Connecting grooves 10 are provided on the inner walls on both sides of the shell 1, and there are multiple connecting grooves 10. The multiple connecting grooves 10 correspond one-to-one to the positions of the multiple heat dissipation grooves 8. Transverse exhaust grooves 11 are provided on the outer walls at both ends of the shell 1, and there are two transverse exhaust grooves 11. The transverse exhaust grooves 11 are connected to the multiple connecting grooves 10.

[0028] Buckle the two electrode sheets 2 on the upper and lower outer walls of the heating sheet 5 respectively. At this time, the two positioning blocks 6 connecting the upper and lower outer walls of the heating sheet 5 are respectively located inside the positioning grooves 9 opened at both ends of the two electrode sheets 2. Align the two limiting strips 3 connected on the back sides of the two electrode sheets 2 with the limiting grooves 4 opened on the upper and lower inner walls of the shell 1. Insert the two electrode sheets 2 into the interior of the shell 1, so that the heating sheet 5 follows the two electrode sheets 2 into the interior of the shell 1. The multiple heat dissipation grooves 8 opened on the outer wall of the heating sheet 5 correspond to the multiple connecting grooves 10 opened on the inner wall of the shell 1, so that the heat generated by the heating sheet 5 during use passes through the multiple connecting grooves 10 and is finally discharged through the horizontal exhaust grooves 11, thereby increasing the contact surface between the heating sheet 5 and the air and improving the heat exchange performance.

[0029] The left ends of the two electrode sheets 2 are fixedly connected to a fixed block 12, the bottom of the inner wall of the fixed block 12 is fixedly connected to a spring 13, and there are multiple springs 13, and the tops of the multiple springs 13 are fixedly connected to a locking block 14, and the right ends of the two electrode sheets 2 are fixedly connected to a wedge block 15, and there are two wedge blocks 15 respectively.

[0030] When the two electrode sheets 2 enter the interior of the shell 1, the two locking blocks 14 retract into the fixed block 12. At this time, the multiple springs 13 are in a compressed state. When the fixed block 12 extends from the left side of the interior of the shell 1, the multiple springs 13 rebound to return the locking block 14 to its original position. The locking block 14 cooperates with the wedge block 15 to fix the electrode sheet 2 inside the shell 1 without shaking.

[0031] The upper and lower inner walls of the outer shell 1 are provided with rectangular grooves 16, and there are multiple rectangular grooves 16. The outer walls at both ends of the outer shell 1 are provided with longitudinal exhaust grooves 17, and there are two longitudinal exhaust grooves 17 respectively. The longitudinal exhaust grooves 17 are connected with multiple rectangular grooves 16. The heat generated by the heating plate 5 during operation passes through the multiple rectangular grooves 16 and is finally discharged through the longitudinal exhaust grooves 17, which further increases the contact area between the heating plate 5 and the air and improves the heat exchange efficiency.

[0032] The rear outer wall of the shell 1 is provided with a connecting groove 18, and there are two connecting grooves 18. The front outer wall of the shell 1 is fixedly connected with a connecting strip 19, and there are two connecting strips 19. The two connecting strips 19 correspond to the positions of the two connecting grooves 18 respectively, and multiple shells 1 can be spliced together.

[0033] The right outer walls of the two electrode sheets 2 are fixedly connected with a conductive sheet 20 , which is located between the two wedge-shaped blocks 15 . The conductive sheet 20 is connected to an external power source to conduct electricity, thereby energizing the heating sheet 5 to generate heat.

[0034] Working principle: Buckle the two electrode sheets 2 on the upper and lower outer walls of the heating sheet 5 respectively. At this time, the two positioning blocks 6 connected to the upper and lower outer walls of the heating sheet 5 are respectively located inside the positioning grooves 9 opened at both ends of the two electrode sheets 2. Align the two limiting strips 3 connected on the back sides of the two electrode sheets 2 with the limiting grooves 4 opened on the upper and lower inner walls of the shell 1. Insert the two electrode sheets 2 into the interior of the shell 1, so that the heating sheet 5 follows the two electrode sheets 2 and enters the interior of the shell 1 together. In the process of the two electrode sheets 2 entering the interior of the shell 1, the two locking blocks 14 retract into the fixing block 12. At this time, the multiple springs 13 are in a compressed state. When the fixing block 12 extends from the left side of the interior of the shell 1, the multiple springs 13 rebound to return the locking block 14 to its position. The locking block 14 cooperates with the wedge block 15 to fix the electrode sheet 2 in the shell 1. The interior will not shake, and the multiple heat dissipation grooves 8 opened on the outer wall of the heating plate 5 correspond to the multiple connecting grooves 10 opened on the inner wall of the shell 1, so that the heat generated by the heating plate 5 when in use passes through the multiple connecting grooves 10 and is finally discharged through the horizontal exhaust grooves 11, and a hollow groove 7 is opened inside the heating plate 5, and a plurality of rectangular grooves 16 are opened on the upper and lower inner walls of the shell 1 respectively. The multiple rectangular grooves 16 are connected to the longitudinal exhaust grooves 17, and cooperate with the hollow grooves 7 and the horizontal exhaust grooves 11 to increase the contact surface between the heating plate 5 and the air, thereby improving the heat exchange performance. Finally, the conductive sheets 20 connected to the right outer walls of the two electrode sheets 2 are energized to make the heating plate 5 heat up, and two connecting grooves 18 are opened on the right outer wall of the shell 1, and two connecting strips 19 are connected on the left outer wall of the shell 1, so that multiple shells 1 can be spliced with each other.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A PTC heating element with high heat exchange efficiency, comprising a housing (1), characterized in that: The housing (1) is provided with an electrode sheet (2), and the number of the electrode sheets (2) is two. The opposite back surfaces of the two electrode sheets (2) are fixedly connected with a limiting strip (3), and the number of the limiting strips (3) is two. The upper and lower inner walls of the housing (1) are provided with a limiting groove (4), and the number of the limiting grooves (4) is two. The limiting strip (3) is located inside the limiting groove (4). A heating sheet (5) is installed inside the two electrode sheets (2). The upper and lower surfaces of the heating sheet (5) are fixedly connected with a positioning block (6), and the number of the positioning block (6) is two. A hollow groove (7) is provided inside the heating sheet (5). The outer sides of the heating sheet (5) are provided with a hollow groove (7). The walls are provided with heat dissipation grooves (8), and the number of the heat dissipation grooves (8) is multiple. Both ends of the two electrode sheets (2) are provided with positioning grooves (9), and the number of the positioning grooves (9) is two. The positioning block (6) is located inside the positioning groove (9). Both inner walls of the two sides of the shell (1) are provided with connecting grooves (10), and the number of the connecting grooves (10) is multiple. The multiple connecting grooves (10) correspond to the positions of the multiple heat dissipation grooves (8) one by one. Both outer walls of the two ends of the shell (1) are provided with transverse exhaust grooves (11), and the number of the transverse exhaust grooves (11) is two. The transverse exhaust grooves (11) are connected to the multiple connecting grooves (10).

2. A PTC heating element with high heat exchange efficiency according to claim 1, characterized in that: The left ends of the two electrode sheets (2) are fixedly connected to a fixing block (12), the inner wall bottoms of the fixing blocks (12) are fixedly connected to a spring (13), and there are multiple springs (13), and the tops of the multiple springs (13) are fixedly connected to a locking block (14).

3. The PTC heating element with high heat exchange efficiency according to claim 1, characterized in that: The right ends of the two electrode sheets (2) are both fixedly connected with a wedge-shaped block (15), and the number of the wedge-shaped blocks (15) is two.

4. The PTC heating element with high heat exchange efficiency according to claim 1, characterized in that: The upper and lower inner walls of the shell (1) are both provided with rectangular grooves (16), and the number of the rectangular grooves (16) is multiple. The outer walls at both ends of the shell (1) are both provided with longitudinal exhaust grooves (17), and the number of the longitudinal exhaust grooves (17) is two respectively. The longitudinal exhaust grooves (17) are connected to the multiple rectangular grooves (16).

5. The PTC heating element with high heat exchange efficiency according to claim 1, characterized in that: The rear outer wall of the shell (1) is provided with a connecting groove (18), and the number of the connecting grooves (18) is two. The front outer wall of the shell (1) is fixedly connected with a connecting strip (19), and the number of the connecting strips (19) is two. The two connecting strips (19) respectively correspond to the positions of the two connecting grooves (18).

6. The PTC heating element with high heat exchange efficiency according to claim 3, characterized in that: The right outer walls of the two electrode sheets (2) are both fixedly connected with a conductive sheet (20), and the conductive sheet (20) is located in the middle of the two wedge-shaped blocks (15).

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