Noise reduction type PTC heater

Abstract

The utility model relates to the technical field of electric heaters, in particular to a noise reduction type PTC heater which comprises a PTC heater body, the PTC heater body comprises an aluminum plate, a cooling fin body and a PTC heating square block, the cooling fin body comprises a first cooling fin and a second cooling fin, the second cooling fin is fixedly connected to the front end of the first cooling fin, and the PTC heating square block is fixedly connected to the front end of the second cooling fin. Each second cooling fin comprises an arc-shaped head and a transition section, the transition section is fixedly connected to the front end of the first cooling fin, the arc-shaped head is fixedly connected to the front end of the transition section, the arc-shaped head and the transition section are of an integrated structure, and a plurality of PTC heating square blocks are fixedly connected between every two adjacent aluminum plates in the multiple sets of aluminum plates located in the middle. The left ends of the two aluminum plates located at the uppermost end and the lowermost end are fixedly connected with inserting pieces. According to the PTC heater, under the mutual cooperation of the first cooling fins, the second cooling fins, the arc-shaped head and the transition section, the wind resistance when airflow passes through can be reduced, and therefore the noise when the PTC heater body works can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to a noise-reducing PTC heater. Background Art

[0002] PTC heating element, also known as PTC heater, is composed of PTC ceramic heating element and aluminum tube. It is an automatic constant temperature and energy-saving electric heater.

[0003] The existing PTC heater includes multiple heat dissipation fins, which are densely distributed and corrugated, and have a large contact area with the external airflow. When the airflow enters through the PTC heater, it will be subject to great wind resistance. The PTC heater will generate a lot of noise during operation, thereby affecting the user experience. Therefore, it is necessary to design a noise-reducing PTC heater. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a noise-reducing PTC heater.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a noise-reducing PTC heater, comprising a PTC heater body, wherein the PTC heater body comprises an aluminum plate, a heat sink body and a PTC heating block, wherein the aluminum plate is provided in three groups, each group of aluminum plates is provided with two, and a plurality of heat sink bodies are fixedly connected between two adjacent aluminum plates in each group of aluminum plates, and an air flow channel is provided between the two adjacent heat sink bodies, wherein the heat sink body comprises a first heat sink and a second heat sink, the second heat sink is fixedly connected to the front end of the first heat sink and is an integrated structure with the first heat sink, the second heat sink comprises an arc head and a transition section, the front end of the first heat sink is fixedly connected to the transition section, the front end of the transition section is fixedly connected to the arc head, and the arc head and the transition section are an integrated structure, a plurality of PTC heating blocks are fixedly connected between two adjacent aluminum plates in the multiple groups of aluminum plates in the middle position, and the left ends of the two aluminum plates located at the uppermost and lowermost ends are fixedly connected to the plug-in pieces.

[0006] As a further description of the above technical solution: a through hole is provided on the upper end surface of the plug-in piece.

[0007] As a further description of the above technical solution: the heat sink body is made of aluminum alloy material.

[0008] As a further description of the above technical solution: the PTC heating block is a ceramic thermistor.

[0009] As a further description of the above technical solution: a gap is provided between two adjacent PTC heating blocks.

[0010] As a further description of the above technical solution: the end face shape of the arc head when viewed from above is semicircular, and the end face shape of the transition section when viewed from above is an isosceles trapezoid.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the existing technology, this noise-reducing PTC heater can reduce the wind resistance when the air flows through through the mutual cooperation of the first heat sink, the second heat sink, the arc head and the transition section, thereby reducing the noise when the PTC heater body is in operation. Specifically, since the arc head and the transition section are of smooth streamlined design, and the guide tip formed by the arc head and the transition section in the second heat sink can evenly distribute the airflow in the airflow channel, the airflow is subjected to smaller wind resistance when passing through multiple heat sink bodies, thereby reducing the noise when the PTC heater body is in operation, making the user experience more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a noise-reducing PTC heater proposed in the present invention;

[0014] Figure 2 This is a structural diagram of the heat sink body in a noise-reducing PTC heater proposed in the present invention;

[0015] Figure 3 A noise-reducing PTC heater proposed in this utility model Figure 2 Schematic diagram of the enlarged structure of A in the middle.

[0016] Legend:

[0017] 1. PTC heater body; 2. Aluminum plate; 3. Heat sink body; 301. First heat sink; 302. Second heat sink; 3021. Arc head; 3022. Transition section; 4. PTC heating block; 5. Connector; 6. Gap; 7. Through hole. DETAILED DESCRIPTION

[0018] Reference Figure 1-3The utility model provides a noise reduction type PTC heater, including a PTC heater body 1, the PTC heater body 1 includes an aluminum plate 2, a heat sink body 3 and a PTC heating block 4, the aluminum plate 2 is provided in three groups, each group of aluminum plates 2 is provided with two, and a plurality of heat sink bodies 3 are fixedly connected between two adjacent aluminum plates 2 in each group of aluminum plates 2, and an air flow channel is provided between two adjacent heat sink bodies 3, the heat sink body 3 includes a first heat sink 301 and a second heat sink 302, the second heat sink 302 is fixedly connected to the front end of the first heat sink 301, and is an integrated structure with the first heat sink 301 The second heat sink 302 includes an arc-shaped head 3021 and a transition section 3022. The front end of the first heat sink 301 is fixedly connected to the transition section 3022, and the front end of the transition section 3022 is fixedly connected to the arc head 3021. The arc head 3021 and the transition section 3022 are an integrated structure. A plurality of PTC heating blocks 4 are fixedly connected between two adjacent aluminum plates 2 in the multiple groups of aluminum plates 2 in the middle position, and the left ends of the two aluminum plates 2 at the top and bottom are fixedly connected to the plug-in pieces 5; the end face shape of the arc head 3021 when viewed from above is semicircular, and the end face shape of the transition section 3022 when viewed from above is an isosceles trapezoid. During operation, the wind resistance of the airflow can be reduced through the mutual cooperation of the first heat sink 301, the second heat sink 302, the arc head 3021 and the transition section 3022, thereby reducing the noise during operation of the PTC heater body 1. Since the arc head 3021 and the transition section 3022 are smooth and streamlined, and the guide tip composed of the arc head 3021 and the transition section 3022 in the second heat sink 302 can make the airflow evenly distributed in the airflow channel, so that when the airflow passes through multiple heat sink bodies 3, the wind resistance it encounters is smaller, thereby reducing the noise during operation of the PTC heater body 1, making the user experience more comfortable.

[0019] As a further description of the above technical solution: the upper end surface of the plug-in piece 5 is provided with a through hole 7. During operation, the existence of the through hole 7 facilitates the installation of the lead wire.

[0020] As a further description of the above technical solution: the heat sink body 3 is made of aluminum alloy. When working, the heat sink body 3 made of aluminum alloy is not only corrosion-resistant and has a long service life, but also lighter in weight and easy to install and carry.

[0021] As a further description of the above technical solution: the PTC heating block 4 is a ceramic thermistor. When working, the ceramic thermistor has good thermal stability, is not easily oxidized, has a long service life, and is safer.

[0022] As a further description of the above technical solution: a gap 6 is provided between two adjacent PTC heating blocks 4. During operation, the gap is used to improve the heat dissipation of the PTC heater body 1.

[0023] Finally, it should be noted that the above are only preferred embodiments of the present invention and are 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 noise reduction type PTC heater, comprising a PTC heater body (1), characterized in that: The PTC heater body (1) comprises an aluminum plate (2), a heat sink body (3) and a PTC heating block (4); the aluminum plates (2) are provided in three groups, each group of aluminum plates (2) is provided with two; a plurality of heat sink bodies (3) are fixedly connected between two adjacent aluminum plates (2) in each group of aluminum plates (2); an air flow channel is provided between two adjacent heat sink bodies (3); the heat sink body (3) comprises a first heat sink (301) and a second heat sink (302); the second heat sink (302) is fixedly connected to the front end of the first heat sink (301) and is in contact with the first heat sink (301). The invention is an integrated structure, wherein the second heat sink (302) comprises an arc-shaped head (3021) and a transition section (3022), the front end of the first heat sink (301) is fixedly connected to the transition section (3022), the front end of the transition section (3022) is fixedly connected to the arc-shaped head (3021), and the arc-shaped head (3021) and the transition section (3022) are an integrated structure, a plurality of PTC heating blocks (4) are fixedly connected between two adjacent aluminum plates (2) in the plurality of groups of aluminum plates (2) at the middle position, and the left ends of the two aluminum plates (2) at the uppermost and lowermost ends are fixedly connected to the plug-in piece (5).

2. The noise reduction PTC heater according to claim 1, characterized in that: A through hole (7) is provided on the upper end surface of the plug-in piece (5).

3. The noise reduction PTC heater according to claim 1, characterized in that: The heat sink body (3) is made of aluminum alloy material.

4. The noise reduction PTC heater according to claim 1, characterized in that: The PTC heating block (4) is a ceramic thermistor.

5. The noise reduction PTC heater according to claim 1, characterized in that: A gap (6) is provided between two adjacent PTC heating blocks (4).

6. The noise reduction PTC heater according to claim 1, characterized in that: The end face shape of the arc-shaped head (3021) when viewed from above is semicircular, and the end face shape of the transition section (3022) when viewed from above is an isosceles trapezoid.

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