WO2018036115A1

WO2018036115A1 - Active heat dissipation electrical knife of hand-held type

Info

Publication number: WO2018036115A1
Application number: PCT/CN2017/074106
Authority: WO
Inventors: 成家忠
Original assignee: 常州市肯迪电器制造有限公司
Priority date: 2016-08-23
Filing date: 2017-02-20
Publication date: 2018-03-01
Also published as: DE202017006730U1; CN206042642U

Abstract

Disclosed is an active heat dissipation electrical knife of hand-held type, belonging to the field of electrical knives. The active heat dissipation electrical knife of hand-held type in the present utility model comprises an electrical knife body. Heat dissipation fans are provided inside the electrical knife body or on a housing thereof. The heat dissipation fans are located near a circuit board inside the electrical knife body, and used for heat dissipation for electronic components on the circuit board. The housing of the electrical knife body is further provided with ventilation holes. In the active heat dissipation electrical knife of hand-held type in the present utility model, the heat dissipation fans are provided near the circuit board inside the electrical knife body, and are capable of achieving effective heat dissipation for the electronic components on the circuit board, thereby guaranteeing that the electrical knife works normally and steadily for a long time, and increasing the service life of the electrical knife.

Description

Active cooling hand-held electric knife

Technical field

The utility model relates to an electric heating knife, in particular to an active heat-dissipating hand-held electric heating knife.

Background technique

Electric knife, as its name suggests, is a hand-held tool that uses electrical energy to heat the cut. Nowadays, there are two kinds of electric knives with different principles on the market. One is to install electric heating wire in the blade and heat after energization. The advantage of this electric knives is that it is cheap, low cost and simple in structure; the disadvantage is that the blade is thicker. The preheating is slow, it can only be used to cut foam products; the other is to use the resistance of the blade to realize the heat-generating hand-held electric knife through large current. The main domestic brands include Kendi electric knife and World Aviation electric knife. The preheating time of the electric knife is very short. As long as the blade can reach the red state in a few seconds, the efficiency is high and the shape is changeable. Different power blades can be selected according to different use occasions, and the application range is wide, and can be used for cutting foam and sponge. Low melting point products such as plastics, chemical fiber cloths, non-woven fabrics, filter cloths, plastic ropes and rubber.

The hot knife that uses the blade resistor to heat has a power frequency or high frequency main transformer, and the main transformer coil is connected to the electric knife blade to provide a large current for the electric knife blade to generate heat. However, in actual use, it is found that when the power of the electric heating knife becomes larger, the temperature rise of the main transformer coil itself becomes higher, and the coil temperature is too high, which causes the failure rate of the key components of the circuit board in the front part of the electric heating knife to be greatly increased, which seriously affects The service life of the electric knife. In particular, electric heating knives for cutting materials such as EPS foam boards for building insulation, because of the high density and thick thickness of such materials, the electric knives are required to have higher power and higher blade temperatures to ensure faster cutting speed, but At this time, the heating of the transformer coil of the electric heating knife is too high, so that the working stability of the electric heating knife is drastically lowered, the power is greatly reduced, and the electric heating knife is damaged.

In order to solve the above problems existing in the existing electric knife, the applicant filed a Chinese patent number ZL201620215938.X on March 21, 2016, and the utility model name is: a patent application for a hand-held electric knife heat sink device, the application The case was announced on August 10, 2016. The application relates to an electric heating knife, comprising a cooling fan, and the cooling fan is arranged near the main transformer coil of the electric heating knife for dissipating heat from the main transformer coil. In the application, a heat dissipating fan and a vent hole are arranged in the vicinity of the main transformer coil of the electric knife to effectively dissipate heat for the transformer coil, and the electric heating knife is normally and stably operated for a long time. However, in actual production practice, the inventor found that in the working process of the electric heating knife, not only the main transformer coil is generated by heat, but also the heat generated by the other components inside the electric heating knife body can cause the temperature rise of the key device to be too high, affecting The performance of the electric knife is difficult to dissipate heat from the main transformer coil and other key components inside the electrothermal knife body only through the cooling fan near the main transformer coil.

Summary of the invention

1. Technical problems to be solved by utility models

The purpose of the utility model is to overcome the above-mentioned deficiencies of the existing electric heating knife and to provide an active heat-dissipating hand-held electric heating knife. By adopting the technical scheme of the utility model, a cooling fan is arranged in the vicinity of the circuit board inside the electric heating body, which can effectively dissipate heat for the components on the circuit board, ensure the normal and stable operation of the electric heating knife for a long time, and improve the service life of the electric heating knife.

2. Technical solutions

In order to achieve the above object, the technical solution provided by the present invention is:

The utility model relates to an active heat-dissipating hand-held electric heating knife, which comprises an electric heating knife body. The inside or the casing of the electric heating knife body is provided with a heat-dissipating fan, and the heat-dissipating fan is located near the circuit board inside the electric heating knife body.

Further, the cooling fan is disposed inside the handle of the electric heating body or on the handle housing.

Further, the casing of the electric heating knife body is further provided with a ventilation hole.

Further, a cooling fan is also disposed in the vicinity of the main transformer coil of the electric heating blade body.

3. Beneficial effects

Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

(1) An active heat-dissipating hand-held electric knife of the present invention, wherein the heat-dissipating fan is disposed near the circuit board inside the body of the electric heating knife, and particularly can be disposed inside the handle or on the handle shell, and the set portion is reasonable, and can effectively The components on the circuit board are cooled; and a cooling fan can be disposed near the main transformer coil of the electric heating body, which can accelerate the heat dissipation of the main transformer coil and key electronic components, ensure the normal and stable operation of the electric heating knife for a long time, and improve the use of the electric heating knife. life.

(2) An active heat-dissipating hand-held electric knife of the utility model has a ventilation hole on the outer casing of the electric heating knife, and uses a ventilation hole to cooperate with the heat-dissipating fan to achieve better air flow, improve heat dissipation efficiency, and achieve better heat dissipation. effect.

DRAWINGS

Figure 1 is a schematic structural view of Embodiment 1 of the present invention;

2 is a schematic structural view of Embodiment 2 of the present invention;

Fig. 3 is a schematic view showing the arrangement of the vent holes in the utility model.

The label description in the schematic diagram:

1, cooling fan; 2, the handle shell; 3, ventilation holes; 4, the main transformer coil.

detailed description

In order to further understand the contents of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

Example 1

As shown in FIG. 1 , an active heat-dissipating hand-held electric knife of the present embodiment includes an electric heating blade body, and a heat-dissipating fan 1 is disposed inside the body of the electric heating blade, and the heat-dissipating fan 1 is located near a circuit board inside the body of the electric heating blade. It can directly dissipate heat for electronic components on the circuit board, improve the working stability and service life of electronic components, thus ensuring the long time of the electric heating knife Normal and stable operation, improve the service life of the electric knife.

As shown in FIG. 1 , in the embodiment, the heat dissipating fan 1 is disposed inside the handle of the electric heating knife body, avoiding the area where the parts are densely arranged, and the set position is reasonable, the cooling fan 1 is conveniently installed, and the handle can be effectively realized as a handle. The internal electronic components dissipate heat to ensure that the electric knife will work normally and stably for a long time. The cooling fan 1 can continuously cool the heat-generating parts in the electric heating knife by means of blowing or sucking air, and the heat-dissipating fan 1 can also be arranged in plurality to increase the rate of air flow, thereby avoiding the high-temperature affecting the power output of the electric heating knife or damaging the electric heating knife. Internal components. Further, a heat dissipating fan 1 is also provided in the vicinity of the main transformer coil 4 of the electric heating blade body, so that the heat dissipation of the main transformer coil 4 can be accelerated, and the service life of the electric heating blade can be improved. The cooling fan 1 can be powered by the electric knife itself or by a separate power source.

As shown in FIG. 3, in the embodiment, the casing of the electric heating blade body is further provided with a venting hole 3, and the ventilating hole 3 is matched with the cooling fan 1 to achieve better air flow and improve the heat dissipation efficiency inside the electric heating blade. If necessary, a filter screen may be arranged at the tuyere of the vent hole 3 to prevent dust and the like from entering the inside of the electric heating knife and affecting the working state and service life of the electric heating knife.

Example 2

As shown in FIG. 2, an active heat-dissipating hand-held electric knife of the present embodiment has the same structure as that of Embodiment 1, except that the heat-dissipating fan 1 is disposed on the body of the electric heating blade, preferably on the electric knife. The handle housing 2 of the body facilitates the installation of the cooling fan 1. In addition, a venting hole 3 (shown in FIG. 3) is also provided on the vicinity of the main transformer coil 4 to accelerate the heat dissipation of the main transformer coil 4.

Taking a hand-held electric knife with a power of 300W and a blade with a length of 200mm as an example, if the cooling fan 1 is not installed, the electric knife will work for about 15 to 25 minutes, and the electric knife will start to be unstable, and the power will drop rapidly. The electric knife was damaged quickly. After the cooling fan 1 was installed, the electric knife continued to work for 6-8 hours. The power of the electric knife only decreased slightly, but it was within the normal working range, and the electric knife could still work normally. It can be seen that after the installation of the cooling fan 1, for the electric heating knife, especially the high-power electric heating knife, the working stability of the electric heating knife is greatly improved, and the working life of the electric heating knife is improved.

The utility model relates to an active heat-dissipating hand-held electric heating knife, which is provided with a cooling fan in the vicinity of a circuit board inside the electric heating body, which can effectively dissipate heat for components on the circuit board, ensure normal and stable operation of the electric heating knife for a long time, and improve the electric heating knife. Service life. Moreover, a heat dissipating fan is also arranged in the vicinity of the main transformer coil of the electric knife, which can achieve better heat dissipation effect, so that the internal parts of the electric heating knife always maintain a lower temperature during the working process, and the internal components of the electric heating knife are stable. Sex and service life.

The present invention and its embodiments have been described above in detail, and the description is not limited thereto, and only one embodiment of the present invention is shown in the drawings, and the actual structure is not limited thereto. Therefore, if the person skilled in the art is inspired by the present invention, the structural modes and embodiments similar to the technical solution are not creatively designed without departing from the inventive concept. protected range.

Claims

An active heat-dissipating hand-held electric knife, comprising an electric heating knife body, characterized in that: a heat dissipating fan (1) is arranged inside or on the casing of the electric heating knife body, and the cooling fan (1) is located inside the electric heating body Near the board.
The active heat sinking electric hot knife according to claim 1, wherein the heat dissipating fan (1) is disposed inside the handle of the electric heating body or on the handle housing (2).
The active heat-dissipating hand-held electric knife according to claim 1 or 2, characterized in that: the casing of the electric heating blade body is further provided with a ventilation hole (3).
The active heat-dissipating hand-held electric knife according to claim 3, characterized in that: the heat-dissipating fan (1) is also arranged in the vicinity of the main transformer coil (4) of the electric heating blade body.