CN210670590U

CN210670590U - High-efficient heat-conduction type PTC heat dissipation device

Info

Publication number: CN210670590U
Application number: CN201921139462.6U
Authority: CN
Inventors: 关政; 杨中伦; 孙家麟
Original assignee: Zhenjiang Tiantong New Material Technology Co ltd
Current assignee: Zhenjiang Tiantong New Material Technology Co ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-06-02
Anticipated expiration: 2029-07-19

Abstract

The high-efficiency heat conduction type PTC heat dissipation device takes a metal foil strip as a base material, the metal foil strip is continuously folded into a rectangular wave shape, the upper and lower rectangular wave tops are welded on the upper and lower sides of an aluminum rectangular pipe, and a PTC heating element is arranged in an aluminum plate groove or the aluminum rectangular pipe; and preparing a strip-shaped heat dissipation device, uniformly arranging PTC heating elements in the aluminum rectangular tube, arranging strip-shaped copper foil electrodes on the upper surface and the lower surface of each PTC heating element, and arranging an insulating layer between each copper foil electrode and the corresponding aluminum rectangular tube. The upper side and the lower side of the aluminum rectangular pipe are welded with the front side and the rear side to be continuously folded into rectangular corrugated foil strips. The utility model discloses a heat dissipation capacity greatly increased.

Description

High-efficient heat-conduction type PTC heat dissipation device

Technical Field

The utility model relates to a heat dissipation device (heat exchange device) of radiator core preparation. Particularly small high-efficiency heat conduction type PTC heat dissipation devices, which are convenient for high-efficiency heat dissipation and particularly used for vehicles (including air conditioners and warm air).

Background

The prior radiating fin, radiating fin and radiating device (heat exchange device) prepared by the radiating fin are most commonly processed by aluminum or aluminum alloy sheets or integral casting, and have extremely wide application: for example, a heater in a household circuit (a typical radiator such as a PTC ceramic heating radiator is most commonly used, and the heater comprises three large components of a heat radiating device, a PTC heating ceramic, a heat radiating device and a fan, wherein the conventional heat radiating device is formed by folding an aluminum sheet into a continuous structure, and the formed aluminum sheet is in a pointed angle shape, and then is brazed with the aluminum sheet to prepare a strip-shaped aluminum foil folded into a continuous pointed angle shape), an aluminum fin of an air conditioner, an oil heater, an automobile air conditioner, an electronic device radiator and other various heat exchangers, but the improvement on a heat radiating fin base is extremely rare.

The applicant has already proposed a heat dissipation device prepared by taking a heating plate as a hot core, and the high-efficiency heat conduction efficiency of the work of the PTC heat dissipation device can be ensured only by extremely high requirement on the thermal contact between the PTC heat radiator and a surface member made of a metal material, but the modes of selecting heat-conducting glue and the like in practical application are not the solutions.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-efficient heat-conduction type PTC heat dissipation device, the heat dissipation device who is prepared by the PTC radiating core, the high-efficient heat-conduction efficiency of work that could guarantee the PTC heat dissipation device of PTC radiator and metal material's surface component's hot contact requirement, direct mount heating element on radiating metal foil strip need not fix the metal foil strip at a dull and stereotyped elder generation, has the better structure of compact rigidity and save material. The unit volume has great heat dissipation capacity, and the heat dissipation efficiency is obviously improved.

The technical scheme of the utility model is that: a high-efficiency heat conduction type PTC heat dissipation device takes a metal foil strip as a base material, the metal foil strip is continuously folded into a rectangular wave shape, the upper and lower rectangular wave tops are welded on the upper and lower sides of an aluminum rectangular tube, and a PTC heating element is arranged in an aluminum plate groove or the aluminum rectangular tube; PTC heating elements are evenly arranged in the aluminum rectangular tube, strip-shaped copper foil electrodes are arranged on the side surfaces of the PTC heating elements, an insulating layer is arranged between each copper foil electrode and the corresponding aluminum rectangular tube, the upper surface and the lower surface of each PTC heating element are in contact with the upper surface and the lower surface of the corresponding aluminum rectangular tube, grooves are formed in the two side surfaces of each aluminum rectangular tube, and grooves are formed in the two side surfaces of each aluminum rectangular tube and are pressure balance grooves.

The pressure equalization channel has a slit cut along a parallel line to the channel.

The utility model takes the metal foil strip as the base material, the metal foil strip is continuously folded into rectangular wave shape, the upper and lower rectangular wave tops are welded with the upper and lower sides of the aluminum rectangular tube, and the aluminum plate groove is integrally prepared into a strip-shaped heat dissipation device; the aluminum plate groove is welded in a vacuum brazing mode, a salt bath furnace mode and the like. The metal foil strip comprises an aluminum or aluminum alloy foil strip. Finally, installing a PTC heating element; the aluminum rectangular pipe can also be replaced by copper, iron rectangular pipe, etc., the utility model discloses it also can with square pipe.

The both sides face of aluminium rectangular pipe all is equipped with the recess and has following effect for pressure balance groove or pressure balance groove along a parallel line in groove has the seam of cutting open: and finally, when the PTC heating element is installed (the longitudinal section of the PTC heating element is similar to that of the aluminum rectangular tube but slightly smaller than that of the aluminum rectangular tube), the balance grooves on the two sides are pressed to the pressure balance grooves by two pressure wheels, the aluminum rectangular tube is subjected to pressure, and the upper surface and the lower surface of the aluminum rectangular tube deform in the flat direction (up-down extrusion), so that the upper surface and the lower surface of the PTC heating element are in contact with the inner surface of the aluminum rectangular tube. The brittle PTC heating element can not be damaged by directly applying pressure to the aluminum rectangular tube, and the pressure deformation of the pressure balance groove can be maintained.

The beneficial effects of the utility model, PTC heating element upper and lower surface and aluminium rectangular pipe internal surface contact are unlikely to again directly to exert pressure to aluminium rectangular pipe and damage fragile PTC heating element, and the pressure deformation of receiving of pressure balance groove can keep. Heating elements are directly arranged on the folded radiating metal foil strips (the heating elements are arranged between the two folded radiating metal foil strips or between the two folded radiating metal foil strips), the metal foil strips are not required to be fixed by a flat plate, and the folding radiating metal foil strips have a compact structure with better rigidity and save materials. The heat transfer efficiency of the utility model is greatly increased; the radiator with the structure is easy to process, and saves cost.

Drawings

Fig. 1 is a schematic diagram of the longitudinal cross-sectional structure of the device of the present invention.

Fig. 2 is a schematic view of the longitudinal section structure of the aluminum rectangular tube of the present invention.

Fig. 3 is a schematic structural diagram of the pressure balance tank of the present invention.

Fig. 4 is a schematic structural view of another shape of the pressure balance groove of the present invention.

Detailed Description

As shown in the figure, the metal foil strip is continuously folded into rectangular waves 1, concave-convex indentation areas 2, aluminum rectangular tubes 3, PTC electric heaters 4 and pressure balance grooves 5.

After the metal heat dissipation device is welded, a PTC heating element (the longitudinal section of the PTC heating element is similar to that of the aluminum rectangular tube but slightly smaller than that of the aluminum rectangular tube) is installed in the aluminum rectangular tube 3, the longitudinal sections of the balance grooves on two sides can be in a concave arc shape or a semicircular shape, the balance grooves on two sides are pressed to the pressure balance groove by two pressure wheels at the same time, the aluminum rectangular tube is subjected to pressure, and the upper surface and the lower surface of the aluminum rectangular tube deform in a flat direction (up-down extrusion), so that the upper surface and the lower surface of the PTC heating element are in contact. The brittle PTC heating element can not be damaged by directly applying pressure to the aluminum rectangular tube, and the pressure deformation of the pressure balance groove can be maintained.

The metal foil strips adopt aluminum foils, the aluminum foils with the thickness of more than 0.3mm (or the thickness of other metal foils can be slightly lower) or the aluminum alloy foils with the thickness of more than 0.25mm have considerable strength, and the aluminum rectangular tubes are brazed.

The structure of PTC combined with a rectangular corrugated radiator folded continuously by a metal foil strip. More generally, a PTC clip is folded into a rectangular corrugated radiator in two metal foil strips, which are all embodiments of the present invention, and the aluminum fins for air conditioner heat dissipation can be folded (applied in the same manner as the prior art). This scheme need not add the flat aluminum plate of welding. An insulating layer is preferably arranged between the foil electrode and the aluminum rectangular tube and is made of materials such as mica and the like, and the aluminum rectangular tube can resist temperature of more than 350 ℃.

Claims

1. The high-efficiency heat conduction type PTC heat dissipation device is characterized in that a metal foil strip is taken as a base material, the metal foil strip is continuously folded into a rectangular wave shape, the upper and lower rectangular wave tops are welded on the upper and lower sides of an aluminum rectangular tube, and a PTC heating element is arranged in an aluminum plate groove or the aluminum rectangular tube; PTC heating elements are uniformly arranged in the aluminum rectangular tube, strip-shaped copper foil electrodes are arranged on the upper surface and the lower surface of each PTC heating element, and an insulating layer is arranged between each copper foil electrode and the corresponding aluminum rectangular tube.

2. A highly efficient heat conduction type PTC heat dissipating device as defined in claim 1, wherein the upper and lower surfaces of the PTC heating element are in contact with the upper and lower surfaces of the rectangular aluminum tube, both side surfaces of the rectangular aluminum tube are provided with grooves, and both side surfaces of the rectangular aluminum tube are provided with grooves as pressure balancing grooves.

3. A high efficiency heat conductive PTC heat sink device according to claim 2, wherein the pressure equalization groove has a slit cut along a parallel line to the groove.