PTC (Positive Temperature Coefficient) electric heater capable of improving heat-conducting property

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) electric heaters, in particular to a PTC electric heater capable of improving heat-conducting property, which comprises a heating body and a radiating fin which are arranged in the PTC electric heater, a connecting assembly used for conducting heat is arranged between the heating body and the radiating fin, the connecting assembly comprises a plurality of convex blocks arranged on the outer walls of the heating body and the radiating fin, and the convex blocks are arranged on the outer walls of the heating body and the radiating fin. A plurality of protruding blocks are arranged on the outer wall of the heating body, filling grooves are formed among the protruding blocks on the outer wall of the heating body and the outer wall of the cooling fin, a plurality of inclined grooves are formed outside the protruding blocks on the outer wall of the heating body, clamping teeth are arranged on the inner walls of the inclined grooves, a plurality of inserting rods are arranged outside the protruding blocks on the outer wall of the cooling fin, and inclined thorns are arranged on the two sides of the outer walls of the inserting rods. According to the utility model, the distribution of silica gel bonding is reduced, the bonding area is increased, the heat conduction effect is improved, the heating body and the radiating fins are connected in an auxiliary manner in a clamping and embedding manner, and the heat conduction performance and the connection stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC electric heaters, in particular to a PTC electric heater with improved thermal conductivity. Background Art

[0002] PTC electric heaters utilize electrical energy to heat objects directly without the need for a heat transfer medium. Their advantages include rapid heating, high efficiency, quiet operation, and easy maintenance, leading to their widespread application in various fields. PTC electric heaters primarily rely on heat generated by electrical resistance. When current passes through the resistance of the PTC material, a significant amount of heat is generated. This heat is transferred to surrounding objects through conduction and convection, bringing the object to the desired temperature.

[0003] However, in the current existing technology, the heating element and the heat dissipation strip in the PTC electric heater are generally connected by silicone bonding. However, this bonding method has the problem of large heat conduction loss, which will reduce the overall performance after long-term use. In addition, the silicone bonding method has the probability of debonding after long-term use, affecting the connection stability. Utility Model Content

[0004] The purpose of the present invention is to provide a PTC electric heater with improved thermal conductivity, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A PTC electric heater with improved thermal conductivity includes a heating element and a heat sink inside the PTC electric heater, a connecting component for heat conduction is provided between the heating element and the heat sink, the connecting component includes a plurality of protrusions provided on the outer walls of the heating element and the heat sink, a filling groove is provided between the plurality of protrusions on the outer walls of the heating element and the heat sink, a plurality of oblique grooves are provided on the outside of the protrusions on the outer wall of the heating element, the inner walls of the plurality of oblique grooves are provided with latch teeth, a plurality of insertion rods are provided on the outside of the protrusions on the outer wall of the heat sink, and oblique spikes are provided on both sides of the outer walls of the plurality of insertion rods.

[0007] As a preferred solution of the present invention, the protrusions on the outer walls of the heating element and the heat sink are integrally formed, and the protrusions on the outer walls of the heating element and the heat sink correspond to and abut against each other.

[0008] As a preferred solution of the present invention, the protrusions can separate the outer wall of the heating element and the heat sink into a plurality of filling grooves, and silicone adhesive strips are filled into the filling grooves during connection.

[0009] As a preferred solution of the present invention, the multiple oblique grooves of the outer wall protrusion of the heating element correspond to the multiple insertion rods on the outer wall protrusion of the heat sink, and the insertion rods on the outer wall of the protrusion are embedded in the oblique grooves outside the protrusion when the heating element and the heat sink are docked.

[0010] As a preferred solution of the present invention, multiple said latches are distributed in an array on the inner wall of the inclined groove, said oblique spikes are integrally formed with the outer wall of the insertion rod and are distributed on both sides of the outer wall of the insertion rod, and the oblique spikes can be folded toward the insertion rod after being squeezed and reset by their own toughness.

[0011] As a preferred solution of the present invention, the latching teeth in the oblique groove correspond to the oblique angles of the outer wall of the insertion rod, and the latching teeth engage with the oblique angles after the insertion rod is inserted into the oblique groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: in response to the problems raised in the background art, the present application adopts a connection assembly, by extending a plurality of protrusions from the outside of the heating element and the heat sink, so that the protrusions on the outer wall of the heating element and the heat sink are correspondingly abutted during connection, and silicone is used for bonding in the empty grooves between the protrusions, thereby reducing the area distribution of the silicone connection and improving the heat conduction effect through the adhesion between the heating element and the heat sink;

[0013] At the same time, when the protrusions on the outside of the heating element and the heat sink are in contact, the protrusions are engaged by snapping, and the heating element and the heat sink are connected with the assistance of silicone bonding to improve the stability of the connection.

[0014] The utility model reduces the distribution of silicone adhesion and increases the bonding area to increase the heat conduction effect, and assists in connecting the heating element and the heat sink by a snap-fitting manner, thereby improving the thermal conductivity and connection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the connection structure between the heating element and the heat sink of the utility model;

[0016] Figure 2 This is the bump distribution diagram of the utility model;

[0017] Figure 3 This is an enlarged view of part A of the present utility model.

[0018] In the figure: 1, heating element; 2, heat sink; 3, bump; 301, filling groove; 4, oblique groove; 401, latching tooth; 5, insertion rod; 501, oblique thorn. DETAILED DESCRIPTION

[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 Figure 1-3 The utility model provides a technical solution: a PTC electric heater with improved thermal conductivity, comprising a heating element 1 and a heat sink 2 inside the PTC electric heater, a connecting component for heat conduction being provided between the heating element 1 and the heat sink 2, the connecting component comprising a plurality of protrusions 3 provided on the outer walls of the heating element 1 and the heat sink 2, the protrusions 3 causing the outer parts of the heating element 1 and the heat sink 2 to bulge and fit together when connected, a plurality of filling grooves 301 can be separated from the outer walls of the heating element 1 and the heat sink 2 by the protrusions 3, and silicone is filled into the filling grooves 301 when connecting to bond the heating element 1 and the heat sink 2 (the protrusions 3 reduce the area of ​​silicone bonding, reducing the silicone bonding area can reduce the loss of heat conduction, and the fitting between the heating element 1 and the protrusions 3 on the outer walls of the heat sink 2 can improve the heat conduction effect), a filling groove 3 is provided between the plurality of protrusions 3 on the outer walls of the heating element 1 and the heat sink 2 The groove 301 is convenient for positioning the silicone adhesion area. The outside of the protrusion 3 on the outer wall of the heating element 1 is provided with multiple oblique grooves 4, and the inner walls of multiple said oblique grooves 4 are provided with latch teeth 401. The outside of the protrusion 3 on the outer wall of the heat sink 2 is provided with multiple insertion rods 5, and both sides of the outer walls of multiple said insertion rods 5 are provided with oblique spikes 501. When the protrusion 3 on the outside of the heating element 1 and the heat sink 2 are fitted together, the insertion rod 5 on the outer wall of the protrusion 3 can be embedded in the oblique groove 4 on the outside of the mating protrusion 3 (at the same time, when the insertion rod 5 is inserted, the oblique spike 501 will abut against the latch teeth 401 in the oblique groove 4 and fold toward the insertion rod 5, and after passing through the latch teeth 401, the oblique spike 501 itself will reset and expand due to its own toughness). After being engaged, the oblique spike 501 on the outer wall of the insertion rod 5 engages with the latch teeth 401 in the oblique groove 4, so that the protrusion 3 on the outer wall of the heating element 1 and the heat sink 2 are bitten and locked, and the silicone bonding assists the connection between the heating element 1 and the heat sink 2 to improve the stability of the connection.

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

[0023] For example, please refer to Figure 1-3The protrusions 3 on the outer walls of the heating element 1 and the heat sink 2 are integrally formed. The protrusions 3 on the outer walls of the heating element 1 and the heat sink 2 correspond to and abut each other. The protrusions 3 can separate the outer walls of the heating element 1 and the heat sink 2 into multiple filling grooves 301. When connecting, fill the filling grooves 301 with silicone adhesive strips. The multiple oblique grooves 4 on the protrusions 3 on the outer wall of the heating element 1 correspond to the multiple insertion rods 5 on the protrusions 3 on the outer wall of the heat sink 2, and when the heating element 1 and the heat sink 2 are docked, the protrusions 3 The insertion rod 5 on the outer wall is embedded in the oblique groove 4 outside the protrusion 3, and multiple said latches 401 are distributed in an array on the inner wall of the oblique groove 4. The said oblique spikes 501 are integrally formed with the outer wall of the insertion rod 5 and are distributed on both sides of the outer wall of the insertion rod 5. The oblique spikes 501 can be folded toward the insertion rod 5 after being squeezed and reset by their own toughness. The latches 401 in the oblique groove 4 correspond to the angles of the oblique spikes 501 on the outer wall of the insertion rod 5. After the insertion rod 5 is embedded in the oblique groove 4, the latches 401 engage with the oblique spikes 501. When in use, first dock the heating element 1 and the heat sink 2 through the protrusion 3 on the outer wall, and at the same time, the heating element 1 and the heat sink 2 are staggered and moved so that the insertion rod 5 on the outer wall of the protrusion 3 is inserted into the oblique groove 4 on the outer wall of the docking protrusion 3, and the oblique spikes 501 on the outer wall of the insertion rod 5 are engaged with the teeth 401 on the inner wall of the oblique groove 4. The fit between the protrusions 3 is a bite to assist in connecting and locking the heating element 1 and the heat sink 2, and then the silicone strip is inserted into the filling groove 301 separated by the protrusion 3 on the outer wall of the heating element 1 and the heat sink 2 and bonded with silicone.

[0024] The working process of the present utility model is as follows: when in use, the heating element 1 and the heat sink 2 are first docked through the protrusion 3 on the outer wall, and at the same time, the insertion rod 5 on the outer wall of the protrusion 3 is inserted into the oblique groove 4 on the outer wall of the docking protrusion 3 by staggered movement between the heating element 1 and the heat sink 2, and the oblique spike 501 on the outer wall of the insertion rod 5 is engaged with the latch 401 on the inner wall of the oblique groove 4, and the engagement between the protrusions 3 is performed to assist in the connection and locking of the heating element 1 and the heat sink 2, and then the silicone strip is inserted into the filling groove 301 separated by the protrusion 3 on the outer wall of the heating element 1 and the heat sink 2 to be bonded by silicone. The present utility model reduces the distribution of silicone bonding and increases the bonding area to increase the heat conduction effect, and assists in connecting the heating element and the heat sink by means of snapping, thereby improving the thermal conductivity and connection stability.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PTC electric heater with improved thermal conductivity, comprising a heating element (1) and a heat sink (2) inside the PTC electric heater, wherein a connecting assembly for heat conduction is provided between the heating element (1) and the heat sink (2), and characterized in that: The connection assembly comprises a plurality of protrusions (3) arranged on the outer walls of the heating element (1) and the heat sink (2); a filling groove (301) is arranged between the plurality of protrusions (3) on the outer walls of the heating element (1) and the heat sink (2); a plurality of inclined grooves (4) are arranged outside the protrusions (3) on the outer walls of the heating element (1); the inner walls of the plurality of inclined grooves (4) are all provided with latching teeth (401); a plurality of insertion rods (5) are arranged outside the protrusions (3) on the outer walls of the heat sink (2); and oblique spikes (501) are arranged on both sides of the outer walls of the plurality of insertion rods (5).

2. The PTC electric heater with improved thermal conductivity according to claim 1, characterized in that: The protrusions (3) on the outer walls of the heating element (1) and the heat sink (2) are integrally formed, and the protrusions (3) on the outer walls of the heating element (1) and the heat sink (2) correspond to and abut against each other.

3. The PTC electric heater with improved thermal conductivity according to claim 1, characterized in that: The protrusion (3) can separate the outer walls of the heating element (1) and the heat sink (2) into a plurality of filling grooves (301), and silicone adhesive strips are filled into the filling grooves (301) during connection.

4. The PTC electric heater with improved thermal conductivity according to claim 1, characterized in that: The multiple oblique grooves (4) of the protrusion (3) on the outer wall of the heating element (1) correspond to the multiple insertion rods (5) on the protrusion (3) on the outer wall of the heat sink (2), and when the heating element (1) and the heat sink (2) are docked, the insertion rods (5) on the outer wall of the protrusion (3) are embedded in the oblique grooves (4) outside the protrusion (3).

5. The PTC electric heater with improved thermal conductivity according to claim 1, characterized in that: The plurality of latch teeth (401) are distributed in an array on the inner wall of the inclined groove (4); the oblique spikes (501) are integrally formed with the outer wall of the insertion rod (5) and are distributed on both sides of the outer wall of the insertion rod (5); and the oblique spikes (501) can be folded toward the insertion rod (5) after being squeezed and reset by their own toughness.

6. The PTC electric heater with improved thermal conductivity according to claim 1, characterized in that: The latching teeth (401) in the inclined groove (4) correspond in angle to the oblique thorns (501) on the outer wall of the insertion rod (5), and the latching teeth (401) and the oblique thorns (501) are engaged after the insertion rod (5) is inserted into the inclined groove (4).

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