PTC (Positive Temperature Coefficient) constant-temperature heating element

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) constant-temperature heating elements, in particular to a PTC constant-temperature heating element, which comprises a protection mechanism, the protection mechanism comprises a protection shell, a PTC ceramic chip is positioned in the protection shell, the upper surface of the PTC ceramic chip is fixedly connected with a first electrode, and the lower surface of the PTC ceramic chip is fixedly connected with a second electrode. A first through hole is formed in the upper surface of the protective shell, a moving mechanism is installed in the first through hole and comprises a cover plate, the surface of the cover plate is attached to the inner wall of the first through hole, a connecting plate is fixedly connected to the lower surface of the cover plate, and an overvoltage protector is fixedly connected to the upper surface of the second insulating plate. The surface of the overvoltage protector is fixedly connected with a connecting line. According to the utility model, the overvoltage protector fixed on the surface of the second insulating plate is inserted between the two connecting wires, so that when the voltage introduced into the device is too large, the circuit is disconnected, and the first insulating plate and the second insulating plate in the device are protected.

Description

Technical Field

[0001] The utility model relates to the field of PTC constant temperature heating elements, in particular to a PTC constant temperature heating element. Background Art

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

[0003] During the use of the common PTC heating elements on the market, since the heating principle of the PTC heating elements is to connect with the electrodes fixed on both sides of the PTC ceramic piece, when the PTC ceramic piece needs to be heated, the voltage across the PTC ceramic piece is increased, and the voltage is difficult to control. Excessive voltage will break down the insulation layer inside the PTC heating element, causing leakage and reducing the service life of the device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a PTC constant temperature heating element.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a PTC constant temperature heating element, comprising a protection mechanism, the protection mechanism comprising a protective shell, a heating mechanism installed inside the protective shell, the heating mechanism comprising a PTC ceramic sheet, the PTC ceramic sheet being located inside the protective shell, the upper surface of the PTC ceramic sheet being fixedly connected to a first electrode, the lower surface of the PTC ceramic sheet being fixedly connected to a second electrode, a first through hole being provided on the upper surface of the protective shell, a moving mechanism being installed inside the first through hole, the moving mechanism comprising a cover plate, the surface of the cover plate being in contact with the inner wall of the first through hole, the lower surface of the cover plate being fixedly connected to a connecting plate, the lower surface of the connecting plate being installed with an insulating mechanism, the insulating mechanism comprising a second insulating plate, the upper surface of the second insulating plate being fixedly connected to an overvoltage protector, and the surface of the overvoltage protector being fixedly connected to a connecting wire.

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

[0007] The inner wall of the protective shell is fixedly connected to the first insulating layer, the inner wall of the first insulating layer is fixedly connected to the second insulating layer, the inner wall of the second insulating layer is fixedly connected to the upper surface of the first electrode, and the surface of the second insulating layer is fixedly connected to the first insulating plate.

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

[0009] The connecting wire passes through the first insulating layer and extends to the inside of the first insulating plate. The end of the connecting wire is fixedly connected to a conductive wire, and the conductive wire passes through the protective shell and extends to the outside of the protective shell.

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

[0011] A movable ring is fixedly connected to the surface of the connecting plate, and the movable ring is located below the cover plate. A groove is provided on the upper surface of the cover plate. A guide rod is fixedly connected to the inner wall of the protective shell, and the guide rod is located inside the movable ring.

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

[0013] A second through hole is formed on the surface of the connecting plate, an insulating silicone block is fixedly connected to the surface of the second insulating plate, and the surface of the insulating silicone block is in contact with the surface of the first insulating plate.

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

[0015] A heat dissipation mechanism is installed on the surface of the protective shell. The heat dissipation mechanism includes a fixing plate. The surface of the fixing plate is fixedly connected to the surface of the protective shell. The inner wall of the fixing plate is fixedly connected to a heat dissipation plate.

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

[0017] Compared with the prior art, this PTC constant temperature heating element is through the first electrode, the second electrode, the second insulating plate, and the overvoltage protector. During use, one end of the first electrode and the second electrode is fixedly connected with a connecting wire, and the connecting wire extends into the first insulating plate fixed inside the protective shell. The cover plate is pressed down so that the connecting plate installed below the cover plate is inserted into the first through hole. The second insulating plate is fixed on the lower surface of the connecting plate. The surface of the first insulating plate contacts the insulating silicone block fixed on the surface of the second insulating plate. The insulating silicone block fills the gap at the connection. At this time, the overvoltage protector fixedly connected to the upper surface of the second insulating plate contacts the connecting wire, so that the internal circuit is connected, and the current can flow from the wire fixed at the end of the connecting wire into the first section of the connecting wire, and then flow through the overvoltage protector, and then flow into the second section of the connecting wire, and then flow into the first electrode, so that the overvoltage protector fixed on the surface of the first electrode The connected PTC ceramic piece is energized and generates heat. When the voltage at both ends of the wire is too large and exceeds the threshold of the overvoltage protector, the built-in fuse of the overvoltage protector blows, and the inside of the device is in a short-circuit state. Compared with conventional devices, during use, since the heating principle of the PTC heating element is through communication with the electrodes fixed on both sides of the PTC ceramic piece, when the PTC ceramic piece needs to be heated, the voltage at both ends of the PTC ceramic piece is increased, and the voltage is difficult to control. Excessive voltage will break down the insulating layer inside the PTC heating element, causing leakage and reducing the service life of the device. When in use, the overvoltage protector fixed on the surface of the second insulating plate can be inserted between the two connecting wires, so that when the voltage passed through the device is too large, the circuit is disconnected, which protects the first insulating plate and the second insulating plate inside the device and improves the service life of the device.

[0018] Compared with the prior art, this PTC constant temperature heating element is equipped with a guide rod, a movable ring and a connecting plate. During use, the movable ring fixed on the surface of the connecting plate is sleeved on the surface of the guide rod to limit the movable ring so that the connecting plate fixed with the movable ring can only move in the vertical direction. After the fuse inside the overvoltage protector is blown, the cover plate can be pulled upward to make the movable mechanism rise. The second insulating plate inside the movable mechanism causes the overvoltage protector to rise from the inside of the protective shell during the rising process, so that the fuse inside the overvoltage protector can be easily replaced, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a PTC constant temperature heating element proposed in the utility model;

[0020] Figure 2 This is a cross-sectional view of a PTC constant temperature heating element proposed in the present utility model;

[0021] Figure 3 A PTC constant temperature heating element proposed in this utility model Figure 2 A magnified view of the structure at point A;

[0022] Figure 4 This is a schematic diagram of the internal structure of a PTC constant temperature heating element proposed in the utility model;

[0023] Figure 5 A PTC constant temperature heating element proposed in this utility model Figure 4 A magnified view of the structure at point B.

[0024] Legend:

[0025] 1. Protection mechanism; 101. Protection shell; 102. First insulating layer; 103. Second insulating layer; 104. First through hole; 2. Heating mechanism; 201. PTC ceramic plate; 202. First electrode; 203. Second electrode; 204. Wire; 3. Moving mechanism; 301. Cover plate; 302. Moving ring; 303. Connecting plate; 304. Guide rod; 305. Groove; 306. Second through hole; 4. Insulation mechanism; 401. First insulating plate; 402. Insulating silicone block; 403. Second insulating plate; 404. Overvoltage protector; 405. Connecting wire; 5. Heat dissipation mechanism; 501. Fixing plate; 502. Heat dissipation plate. DETAILED DESCRIPTION

[0026] Reference Figure 1-5The present invention provides a PTC constant temperature heating element: comprising a protection mechanism 1, the protection mechanism 1 comprising a protection shell 101, a heating mechanism 2 installed inside the protection shell 101, the heating mechanism 2 comprising a PTC ceramic sheet 201, the PTC ceramic sheet 201 being located inside the protection shell 101, a first electrode 202 being fixedly connected to the upper surface of the PTC ceramic sheet 201, a second electrode 203 being fixedly connected to the lower surface of the PTC ceramic sheet 201, a first through hole 104 being opened on the upper surface of the protection shell 101, a moving mechanism 3 being installed inside the first through hole 104, the moving mechanism 3 comprising a cover plate 301 The surface of the cover plate 301 fits with the inner wall of the first through hole 104, and the lower surface of the cover plate 301 is fixedly connected to the connecting plate 303. The lower surface of the connecting plate 303 is installed with an insulating mechanism 4, and the insulating mechanism 4 includes a second insulating plate 403. The upper surface of the second insulating plate 403 is fixedly connected to the overvoltage protector 404. The surface of the overvoltage protector 404 is fixedly connected with a connecting wire 405. One end of the first electrode 202 and the second electrode 203 is fixedly connected with a connecting wire 405. The connecting wire 405 extends into the first insulating plate 401 fixed inside the protective shell 101. Press the cover plate 301 downward so that the cover plate 30 1 is inserted into the first through hole 104. The second insulating plate 403 is fixed to the lower surface of the connecting plate 303. The surface of the first insulating plate 401 contacts the insulating silicone block 402 fixed to the surface of the second insulating plate 403. The insulating silicone block 402 fills the gap at the connection. At this time, the overvoltage protector 404 fixed to the upper surface of the second insulating plate 403 contacts the connecting wire 405, so that the internal circuit is connected. The current can flow from the wire 204 fixed at the end of the connecting wire 405 into the first section of the connecting wire 405, then flow through the overvoltage protector 404, and then flow into the second section of the connecting wire. 405, and then flows into the first electrode 202, so that the PTC ceramic plate 201 fixedly connected to the surface of the first electrode 202 is energized and heated. When the voltage at both ends of the wire 204 is too large and exceeds the threshold of the overvoltage protector 404, the built-in fuse of the overvoltage protector 404 blows, and the inside of the device is in a short-circuit state. The overvoltage protector 404 fixed on the surface of the second insulating plate 403 is inserted between the two connecting wires 405, so that when the voltage entering the inside of the device is too large, the circuit is disconnected, which protects the first insulating plate 401 and the second insulating plate 403 inside the device and improves the service life of the device.

[0027] The inner wall of the protective shell 101 is fixedly connected to the first insulating layer 102, the inner wall of the first insulating layer 102 is fixedly connected to the second insulating layer 103, the inner wall of the second insulating layer 103 is fixedly connected to the upper surface of the first electrode 202, the surface of the second insulating layer 103 is fixedly connected to the first insulating plate 401, the connecting wire 405 passes through the first insulating layer 102 and extends to the inside of the first insulating plate 401, the end of the connecting wire 405 is fixedly connected to the wire 204, the wire 204 passes through the protective shell 101 and extends to the outside of the protective shell 101, the surface of the connecting plate 303 is fixedly connected to the movable ring 302, the movable ring 302 is located below the cover plate 301, and a groove 305 is provided on the upper surface of the cover plate 301, the inner wall of the protective shell 101 is fixedly connected to the guide rod 304, the guide rod 304 is located inside the movable ring 302, the movable ring 302 fixed on the surface of the connecting plate 303 is sleeved on the surface of the guide rod 304, The limit is performed so that the connecting plate 303 fixed to the movable ring 302 can only move in the vertical direction. After the fuse inside the overvoltage protector 404 is blown, the cover plate 301 can be pulled upward to make the movable mechanism 3 rise. The second insulating plate 403 inside the movable mechanism 3 causes the overvoltage protector 404 to rise from the inside of the protective shell 101 during the rising process, and the fuse inside the overvoltage protector 404 can be easily replaced, thereby improving the practicality of the device. A second through hole 306 is provided on the surface of the connecting plate 303, and an insulating silicone block 402 is fixedly connected to the surface of the second insulating plate 403. The surface of the insulating silicone block 402 is in contact with the surface of the first insulating plate 401. A heat dissipation mechanism 5 is installed on the surface of the protective shell 101. The heat dissipation mechanism 5 includes a fixed plate 501, the surface of the fixed plate 501 is fixedly connected to the surface of the protective shell 101, and the inner wall of the fixed plate 501 is fixedly connected to the heat dissipation plate 502.

[0028] Working principle: One end of the first electrode 202 and the second electrode 203 are fixedly connected with a connecting wire 405, which extends into the first insulating plate 401 fixed inside the protective shell 101. The cover plate 301 is pressed down so that the connecting plate 303 installed below the cover plate 301 is inserted into the first through hole 104. The second insulating plate 403 is fixed on the lower surface of the connecting plate 303. The surface of the first insulating plate 401 contacts the insulating silicone block 402 fixed on the surface of the second insulating plate 403. The insulating silicone block 40 2. Fill the gap at the connection. At this time, the overvoltage protector 404 fixedly connected to the upper surface of the second insulating plate 403 is in contact with the connecting wire 405, so that the internal circuit is connected. The current can flow from the wire 204 fixed at the end of the connecting wire 405 into the first section of the connecting wire 405, then flow through the overvoltage protector 404, then flow into the second section of the connecting wire 405, and then flow into the first electrode 202, so that the PTC ceramic piece 201 fixedly connected to the surface of the first electrode 202 is energized and heated. When the wire 204 When the voltage at both ends is too large and exceeds the threshold of the overvoltage protector 404, the built-in fuse of the overvoltage protector 404 blows, and the internal circuit of the device is in a short circuit state. The overvoltage protector 404 fixed on the surface of the second insulating plate 403 is inserted between the two connecting wires 405, so that when the voltage entering the device is too large, the circuit is disconnected, thereby protecting the first insulating plate 401 and the second insulating plate 403 inside the device, thereby improving the service life of the device. The movable ring 302 fixed on the surface of the connecting plate 303 is sleeved on the surface of the guide rod 304, limiting the movable ring 302 so that the connecting plate 303 fixed to the movable ring 302 can only move in the vertical direction. After the fuse inside the overvoltage protector 404 blows, the cover plate 301 can be pulled upward to make the moving mechanism 3 rise. During the rising process, the second insulating plate 403 inside the moving mechanism 3 causes the overvoltage protector 404 to rise from the inside of the protective shell 101, so that the fuse inside the overvoltage protector 404 can be easily replaced, thereby improving the practicality of the device.

[0029] 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 constant temperature heating element, comprising a protection mechanism (1), characterized in that: The protection mechanism (1) comprises a protection shell (101), a heating mechanism (2) is installed inside the protection shell (101), the heating mechanism (2) comprises a PTC ceramic sheet (201), the PTC ceramic sheet (201) is located inside the protection shell (101), a first electrode (202) is fixedly connected to the upper surface of the PTC ceramic sheet (201), a second electrode (203) is fixedly connected to the lower surface of the PTC ceramic sheet (201), a first through hole (104) is opened on the upper surface of the protection shell (101), and the first through hole (104) A moving mechanism (3) is installed inside the cover (301), the moving mechanism (3) comprising a cover plate (301), the surface of the cover plate (301) being in contact with the inner wall of the first through hole (104), the lower surface of the cover plate (301) being fixedly connected to a connecting plate (303), the lower surface of the connecting plate (303) being installed with an insulating mechanism (4), the insulating mechanism (4) comprising a second insulating plate (403), the upper surface of the second insulating plate (403) being fixedly connected to an overvoltage protector (404), the surface of the overvoltage protector (404) being fixedly connected to a connecting wire (405).

2. A PTC constant temperature heating element according to claim 1, characterized in that: The inner wall of the protective shell (101) is fixedly connected to a first insulating layer (102), the inner wall of the first insulating layer (102) is fixedly connected to a second insulating layer (103), the inner wall of the second insulating layer (103) is fixedly connected to the upper surface of the first electrode (202), and the surface of the second insulating layer (103) is fixedly connected to a first insulating plate (401).

3. A PTC constant temperature heating element according to claim 1, characterized in that: The connecting wire (405) passes through the first insulating layer (102) and extends to the inside of the first insulating plate (401); the end of the connecting wire (405) is fixedly connected to a wire (204); and the wire (204) passes through the protective shell (101) and extends to the outside of the protective shell (101).

4. A PTC constant temperature heating element according to claim 1, characterized in that: A movable ring (302) is fixedly connected to the surface of the connecting plate (303), the movable ring (302) is located below the cover plate (301), a groove (305) is provided on the upper surface of the cover plate (301), and a guide rod (304) is fixedly connected to the inner wall of the protective shell (101), the guide rod (304) is located inside the movable ring (302).

5. The PTC constant temperature heating element according to claim 1, characterized in that: A second through hole (306) is provided on the surface of the connecting plate (303), an insulating silicone block (402) is fixedly connected to the surface of the second insulating plate (403), and the surface of the insulating silicone block (402) is in contact with the surface of the first insulating plate (401).

6. The PTC constant temperature heating element according to claim 1, characterized in that: A heat dissipation mechanism (5) is installed on the surface of the protective shell (101), and the heat dissipation mechanism (5) comprises a fixing plate (501), the surface of the fixing plate (501) is fixedly connected to the surface of the protective shell (101), and the inner wall of the fixing plate (501) is fixedly connected to a heat dissipation plate (502).

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