PTC (Positive Temperature Coefficient) electric heater with protective structure

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) electric heaters, in particular to a PTC electric heater with a protection structure, which comprises a heater, supporting seats are arranged at two ends of the heater, a protection assembly for preventing impurities from invading is arranged outside the supporting seats, and the protection assembly comprises a protection shell arranged on the outer wall of the supporting seat. Positioning grooves are formed in the two sides of the outer wall of the protective shell, connecting frames are arranged in the two positioning grooves, sliding blocks are arranged on the two sides of the outer walls of the two connecting frames, a lead screw is arranged in the sliding block on the outer wall of one connecting frame, and mounting frames are arranged on the inner walls of the two connecting frames; a plurality of matching grooves are formed in the inner wall of the mounting frame, screens are arranged on the inner walls of the matching grooves, and a cavity is formed in the mounting frame. By wrapping the end points of the PTC electric heater, condensate water or impurities are effectively prevented from getting close to the joint of the positive electrode and the negative electrode of the heater, the heater is protected, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC electric heaters, and particularly relates to a PTC electric heater with a protection structure. Background Technique

[0002] A PTC electric heater is a device that directly heats an object using electric energy without the need for a heat transfer medium. It has the advantages of fast heating speed, high efficiency, no noise, and simple maintenance, so it is widely used in various fields. The PTC electric heater mainly relies on the heat generated by the resistance to heat. When an electric current passes through the resistance of the PTC material, a large amount of heat is generated. These heats will be transferred to the surrounding objects through conduction and convective heat transfer, so that the objects reach the required temperature.

[0003] However, in the current prior art, the PTC electric heater has no protective cover at the end and is directly exposed. During the use of the air conditioner, condensate water and impurities will be generated. Since the PTC electric heater usually uses metal wires or connectors to connect different circuit parts, when the condensate water generated by the air conditioner contacts the connection part of the PTC electric heater, it will cause a short circuit of the electric heater. Content of the Utility Model

[0004] The purpose of the utility model is to provide a PTC electric heater with a protection structure to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A PTC electric heater with a protection structure includes a heater. Both ends of the heater are provided with support seats. A protection component for preventing impurities from invading is arranged outside the support seats. The protection component includes a protective shell arranged on the outer wall of the support seat. Positioning grooves are arranged on both sides of the outer wall of the protective shell. Connecting frames are arranged inside the two positioning grooves. Sliders are arranged on both sides of the outer walls of the two connecting frames. A lead screw is arranged inside the slider on the outer wall of one of the connecting frames. Mounting frames are arranged on the inner walls of the two connecting frames. A plurality of matching grooves are arranged on the inner wall of the mounting frame. Screens are arranged on the inner walls of the matching grooves. A cavity is arranged inside the mounting frame.

[0007] As a preferred scheme of the utility model, the protective shell is sleeved on the outer wall of the support seat and is slidably connected with the support seat, and is connected with the support seat by bolts.

[0008] As a preferred scheme of the utility model, the two positioning grooves are respectively located on both sides of the protective shell and are correspondingly communicated with the connection part of the internal support seat circuit after being installed on the protective shell.

[0009] As a preferred solution of the present utility model, the connecting frame is located in the positioning groove and is slidably connected with the positioning groove. The slider is connected to the outer wall of the connecting frame by welding. The lead screw is located in the slider on the outer wall of one of the connecting frames and is rotatably connected to the inner wall of the slider, and the other end can extend through the slider outside the other connecting frame.

[0010] As a preferred solution of the present utility model, the installation frame is connected to the inner wall of the connecting frame by bolts. The matching groove is located on the side of the installation frame facing the inner support seat of the protective shell. The matching grooves on the outer walls of the two installation frames face each other and correspond to the structure of the circuit connection on the support seat.

[0011] As a preferred solution of the present utility model, the screen is inlaid with the inner wall of the matching groove. The matching groove communicates with the cavity in the installation frame through the screen, and a storage tank for loading molecular sieve is installed inside the cavity.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: In response to the problems raised in the background art, the present application adopts a protection component. By sleeving a protective cover on the end support seat of the PTC electric heater, the protective cover can prevent condensed water or external impurities from entering the positive and negative connection points of the PTC electric heater tube. When the protective cover is installed, the connection point of the PTC electric heater is wrapped by the docking frame. When water vapor invades the inside of the protective cover, the molecular sieve in the docking frame can absorb the water vapor, avoiding affecting the circuit and causing abnormal short-circuit and other faults, and improving the safety during the use of the PTC electric heater.

[0013] The present utility model wraps the end points of the PTC electric heater, effectively preventing condensed water or impurities from approaching the positive and negative connection points of the heater, protecting the heater, and improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0015] Figure 2 is an external structure view of the protective shell of the present utility model;

[0016] Figure 3 is an external structure view of the installation frame of the present utility model;

[0017] Figure 4 is a top view cross-sectional view of the installation frame of the present utility model.

[0018] In the figure: 1. Heater; 2. Support seat; 3. Protective shell; 301. Positioning groove; 4. Connecting frame; 401. Slider; 402. Lead screw; 5. Installation frame; 6. Matching groove; 601. Screen; 7. Cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention.

[0020] Example

[0021] See also Figures 1-4 The utility model provides a technical solution: a PTC electric heater with a protective structure, comprising a heater 1, support seats 2 are provided at both ends of the heater 1, and a protective component for preventing impurities from invading is provided on the outside of the support seat 2, and the protective component comprises a protective shell 3 arranged on the outer wall of the support seat 2, and the protective shell 3 can be sleeved on the support seat 2 at the end of the heater 1, and wrap the connection of the heater 1 on the support seat 2 to play a protective role, so as to prevent condensed water or external impurities generated by the air conditioner from approaching the positive and negative pole connections of the PTC electric heating tube, and positioning grooves 301 are provided on both sides of the outer wall of the protective shell 3 for locating the installation position of the connecting frame 4, so that the installation frame 5 of the inner wall corresponds to the connection of the PTC electric heating tube when the connecting frame 4 is installed, and connecting frames 4 are provided inside the two positioning grooves 301, and sliders 401 are provided on both sides of the outer walls of the two connecting frames 4 for positioning the angle of the connecting frame 4 when it is installed, and one of the outer walls of the connecting frame 4 A screw rod 402 is arranged in the slider 401, and the outer wall of the screw rod 402 matches the inner wall of the slider 401, so that the screw rod 402 can drive the two connecting frames 4 to move relative to each other through the slider 401 after passing through the slider 401 (the textures of the inner walls of the slider 401 on the outer walls of the two connecting frames 4 are opposite, so the screw rod 402 can rotate to drive the two connecting frames 4 to move relative to each other), and the inner walls of the two connecting frames 4 are both provided with a mounting frame 5, and the inner wall of the mounting frame 5 is provided with a plurality of matching grooves 6, and the matching grooves 6 correspond to the structure of the connection of the PTC electric heating tube, so that after the connecting frame 4 is installed, the mounting frame 5 clamps the connection of the PTC electric heating tube, and the inner wall of the matching groove 6 is provided with a screen 601, so that the matching groove 6 and the cavity 7 are connected to the air and the storage tank in the cavity 7 is prevented from falling, and the mounting frame 5 is provided with a cavity 7 inside, and the storage tank loaded with a molecular sieve in the cavity 7 absorbs water vapor when it approaches due to the molecular sieve's absorption property of water molecules, so as to keep the connection of the PTC electric heating tube dry. The PTC electric heating tube is connected to a wiring harness, one end of the wiring harness is connected to a power source, and the other end is connected to the PTC electric heating tube, and a thermostat and a fuse are arranged on the wiring harness.

[0022] In this embodiment, all electrical components are controlled by conventional controllers.

[0023] For example, please refer to Figures 1-4, the protective shell 3 is sleeved on the outer wall of the support seat 2 and is slidably connected to the support seat 2 and connected to the support seat 2 by bolts. The two positioning grooves 301 are respectively located on both sides of the protective shell 3 and are correspondingly communicated with the connection part of the internal support seat 2 circuit after being installed on the protective shell 3. The connecting frame 4 is located in the positioning groove 301 and is slidably connected to the positioning groove 301. The slider 401 is connected to the outer wall of the connecting frame 4 by welding. The lead screw 402 is located in the slider 401 on the outer wall of one of the connecting frames 4 and is rotatably connected to the inner wall of the slider 401, and the other end can extend through the slider 401 outside the other connecting frame 4. The mounting frame 5 is connected to the inner wall of the connecting frame 4 by bolts. The matching groove 6 is located on the side of the mounting frame 5 facing the support seat 2 inside the protective shell 3. The matching grooves 6 on the outer walls of the two mounting frames 5 face each other and correspond to the structure of the circuit connection part on the support seat 2. The screen 601 is inlaid with the inner wall of the matching groove 6. The matching groove 6 is communicated with the cavity 7 inside the mounting frame 5 through the screen 601. A storage tank loaded with molecular sieve is installed inside the cavity 7. When in use, first sleeve the protective shell 3 on the support seat 2 at the end of the heater 1 at a specified position and connect it to the support seat 2 by bolts. Then install the connecting frame 4 in the positioning groove 301. At the same time, rotate the lead screw 402 so that the lead screw 402 extends through the slider 401 outside the other connecting frame 4, and rotate to drive the two connecting frames 4 to approach through the external thread so that the mounting frame 5 on the inner wall of the connecting frame 4 clamps and covers the connection part of the PTC electric heating tube; prevent the entry of condensed water or impurities through the protective shell 3, and absorb them through the molecular sieve in the mounting frame 5 after the water vapor invades. Prevent faults such as short circuits in the circuit and improve the use safety of the electric heater.

[0024] The working process of the present utility model: When in use, first sleeve the protective shell 3 on the support seat 2 at the end of the heater 1 at a specified position and connect it to the support seat 2 by bolts. Then install the connecting frame 4 in the positioning groove 301. At the same time, rotate the lead screw 402 so that the lead screw 402 extends through the slider 401 outside the other connecting frame 4, and rotate to drive the two connecting frames 4 to approach through the external thread so that the mounting frame 5 on the inner wall of the connecting frame 4 clamps and covers the connection part of the PTC electric heating tube; prevent the entry of condensed water or impurities through the protective shell 3, and absorb them through the molecular sieve in the mounting frame 5 after the water vapor invades. Prevent faults such as short circuits in the circuit and improve the use safety of the electric heater. The present utility model wraps the endpoints of the PTC electric heater, effectively avoiding condensed water or impurities approaching the positive and negative electrode connection parts of the heater, protecting the heater, and improving the use safety.

[0025] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A PTC electric heater with a protective structure, comprising a heater (1), wherein both ends of the heater (1) are provided with a support seat (2), and the support seat (2) is provided with a protective component outside for preventing impurities from entering, characterized in that: The protective assembly comprises a protective shell (3) arranged on the outer wall of a support seat (2), positioning grooves (301) are arranged on both sides of the outer wall of the protective shell (3), connecting frames (4) are arranged inside the two positioning grooves (301), sliders (401) are arranged on both sides of the outer walls of the two connecting frames (4), a screw rod (402) is arranged inside the slider (401) on the outer wall of one of the connecting frames (4), installation frames (5) are arranged on the inner walls of the two connecting frames (4), a plurality of matching grooves (6) are arranged on the inner walls of the matching grooves (6), a screen (601) is arranged on the inner walls of the matching grooves (6), and a cavity (7) is arranged inside the installation frame (5).

2. The PTC electric heater with a protective structure according to claim 1, characterized in that: The protective shell (3) is sleeved on the outer wall of the support seat (2), and is slidably connected to the support seat (2), and is connected to the support seat (2) via bolts.

3. The PTC electric heater with a protective structure according to claim 1, characterized in that: The two positioning grooves (301) are respectively located on both sides of the protective shell (3), and are correspondingly connected to the connection points of the internal support base (2) circuit after the protective shell (3) is installed.

4. The PTC electric heater with a protective structure according to claim 1, characterized in that: The connecting frame (4) is located in the positioning groove (301) and is slidably connected to the positioning groove (301); the sliding block (401) is connected to the outer wall of the connecting frame (4) by welding; the screw rod (402) is located in the sliding block (401) on the outer wall of one of the connecting frames (4) and is rotatably connected to the inner wall of the sliding block (401); the other end can extend through the sliding block (401) outside the other connecting frame (4).

5. The PTC electric heater with a protective structure according to claim 1, characterized in that: The installation frame (5) is connected to the inner wall of the connecting frame (4) by means of bolts, the matching groove (6) is located on the side of the installation frame (5) facing the support seat (2) inside the protective shell (3), the matching grooves (6) on the outer walls of the two installation frames (5) are opposite to each other and correspond to the circuit connection structure on the support seat (2).

6. The PTC electric heater with a protective structure according to claim 1, characterized in that: The sieve (601) is inlaid and connected with the inner wall of the matching groove (6); the matching groove (6) is connected with the cavity (7) in the installation frame (5) through the sieve (601); and a storage tank loaded with molecular sieve is installed inside the cavity (7).

Images