Small PTC heater

Abstract

The utility model discloses a small PTC heater, which comprises a section bar body, a heating core body is arranged on the section bar body, a core body accommodating cavity is arranged on the section bar body, the core body accommodating cavity is provided with two oppositely arranged heat conduction surfaces, the heating core body is arranged in the core body accommodating cavity, and two heating surfaces of the heating core body are opposite to and mutually attached to the heat conduction surfaces. A through hole is formed in the position, adjacent to one heat conduction face, of the sectional material body, an aluminum pipe penetrating through the through hole is arranged in the through hole, the outer wall of the aluminum pipe is tightly attached to the hole wall of the through hole through the pipe expanding technology, and heat dissipation strips are arranged on the surface, adjacent to the other heat conduction face, of the sectional material body. Compared with the prior art, the core containing cavity is formed in the profile body, the aluminum pipe and the heat dissipation strip are arranged at the opposite positions of the two heat conduction faces of the core containing cavity respectively, the two heating modes of water heating and air heating are achieved, the stability of the product under the maximum power is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to a heater, in particular to a small PTC heater. Background Art

[0002] At present, in the case where the volume of the small PTC water heater and the installation space of the whole machine are limited, the number of PTC sheets is limited. Under different conditions of power requirements, it is necessary to ensure that the power of the small PTC water heater is stable and can meet the requirements. The key to exerting its maximum power lies in heat conduction. The water passing aluminum pipe of the small PTC water heater has a small diameter, generally a small inner diameter. The way of forming by integral casting has high requirements for the mold and high processing cost, and the product performance consistency cannot be guaranteed; it is very difficult to ensure the close fit between the aluminum profile and the stainless steel pipe. Coupled with the fact that the thermal conductivity coefficient of the stainless steel pipe is much lower than that of the aluminum material, it is very difficult to ensure the power of the product. And most of the small PTC water heater products are limited to a single heating method, which cannot meet the special structural requirements of customers, and it is difficult to maintain the product performance. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a small PTC heater, and the technical problem to be solved is to improve the stability under the maximum power of the product and realize two heating methods, and improve the service life of the product.

[0004] To solve the above problems, the utility model is realized by adopting the following technical solutions: A small PTC heater includes a profile body, a heating core is arranged on the profile body. A core accommodating cavity is arranged on the profile body. The core accommodating cavity has two opposite heat conducting surfaces. The heating core is arranged in the core accommodating cavity. The two heating surfaces of the heating core face and are in close contact with the heat conducting surfaces. A through hole is arranged at a position adjacent to one of the heat conducting surfaces on the profile body. An aluminum pipe passing through the through hole is arranged in the through hole. The outer wall of the aluminum pipe is in close contact with the hole wall of the through hole through an expanding tube process. Heat dissipation strips are arranged on the surface of the profile body adjacent to the other heat conducting surface.

[0005] Further, two through holes are arranged on the profile body. The aluminum pipe is U-shaped, and the two straight pipe sections of the aluminum pipe respectively pass through the two through holes.

[0006] Further, raised limiting strips are symmetrically arranged on the surface where the heat dissipation strips are arranged. The limiting strips are arranged along the length direction of the profile body.

[0007] Further, deformation parts are arranged at positions of the two other surfaces of the core accommodating cavity of the profile body except the heat conducting surfaces.

[0008] Compared with the prior art, the utility model realizes two heating methods of water heating and air heating by arranging a core accommodating cavity in the profile body and arranging an aluminum tube and heat dissipation strips at positions opposite to two heat conducting surfaces of the core accommodating cavity, improves the stability under the maximum power of the product and extends the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is an external schematic view of the utility model.

[0010] Figure 2 is an exploded schematic view of the utility model.

[0011] Figure 3 is Figure 1 a cross-sectional view taken along the A-A direction in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0013] As Figures 1 to 3 shown, the utility model discloses a small PTC heater, which includes a profile body 1, a heating core 2 is arranged on the profile body 1. The profile body 1 is strip-shaped, a core accommodating cavity 3 is arranged on the profile body 1, the core accommodating cavity 3 is arranged along the length direction of the profile body 1, the core accommodating cavity 3 has two oppositely arranged heat conducting surfaces, the heating core 2 is arranged in the core accommodating cavity 3, and two heating surfaces of the heating core 2 are opposite to and in close contact with the heat conducting surfaces. Two through holes 4 are arranged at a position adjacent to one of the heat conducting surfaces of the profile body 1, the two through holes 4 are symmetrically arranged, an aluminum tube 5 passing through the through holes 4 is arranged in the two through holes 4, the aluminum tube 5 is U-shaped, two straight tube parts of the aluminum tube 5 respectively pass through the through holes 4, and the outer walls of the straight tube parts of the aluminum tube 5 are in close contact with the hole walls of the through holes 4 through an expanding tube process, solving the problem that insufficient close contact between the two affects the product power factor, ensuring the heat conduction efficiency, greatly improving the stability of the maximum power of the product, and since no other processes need to be added between the aluminum tube 5 and the profile body 1, the overall process efficiency is greatly improved. Heat dissipation strips 6 are arranged on the surface of the profile body 1 adjacent to the other heat conducting surface, so as to realize heating in two ways, namely air heating and water heating. The heat dissipation strips 6 are fixed on the heat conducting surface of the profile body 1 by welding, which can ensure the heat dissipation area, make the heat concentrated, and ensure the safety performance and low cost at the same time.

[0014] Certainly, by alternately and cooperatively using the two heating methods, the service life of the product can be extended.

[0015] As Figure 2As shown in the figure, raised limit strips 7 are symmetrically arranged on the surface provided with the heat dissipation strips 6. The limit strips 7 are arranged along the length direction of the profile body 1 to position the heat dissipation strips 6 for easy assembly.

[0016] As Figure 2 shown in the figure, deformation parts 8 are provided at the positions of the other two surfaces of the profile body 1 except the heat conduction surface in the core accommodation cavity 3, so as to apply pressure to the profile body 1 through an external force, so that the heat conduction surface is in close contact with the heating surface of the heating core 2.

[0017] In the present utility model, the profile body 1 is an aluminum profile.

[0018] The heating core 2 adopts a waterproof PTC heating core of the prior art.

Claims

1. A small PTC heater, comprising a profile body (1), on which a heating core (2) is arranged, characterized in that: The profile body (1) is provided with a core accommodating cavity (3), the core accommodating cavity (3) having two heat-conducting surfaces arranged opposite to each other, the heating core (2) is arranged in the core accommodating cavity (3), the two heating surfaces of the heating core (2) are opposite to and fit with the heat-conducting surfaces, a through hole (4) is arranged at a position of the profile body (1) adjacent to one of the heat-conducting surfaces, an aluminum tube (5) passing through the through hole (4) is arranged in the through hole (4), the outer wall of the aluminum tube (5) is closely fitted with the hole wall of the through hole (4) through a tube expansion process, and a heat dissipation strip (6) is arranged on the surface of the profile body (1) adjacent to the other heat-conducting surface.

2. The small PTC heater according to claim 1, characterized in that: The profile body (1) is provided with two through holes (4); the aluminum tube (5) is U-shaped; and two straight tube sections of the aluminum tube (5) pass through the two through holes (4) respectively.

3. The small PTC heater according to claim 2, characterized in that: The surface on which the heat dissipation strip (6) is provided is provided with symmetrically arranged raised limiting strips (7), and the limiting strips (7) are arranged along the length direction of the profile body (1).

4. The small PTC heater according to claim 3, characterized in that: The profile body (1) is provided with deformation portions (8) at positions on the other two surfaces of the core accommodating cavity (3) except the heat-conducting surface.

Images