KR20240050623A - Low-power and high-efficiency heater for 1-ton electric trucks using eddy current - Google Patents

Abstract

The present invention relates to a heater for an electric vehicle, which includes a motor that rotates a rotating shaft, a blowing fan that is coupled to the end of the rotating shaft and rotates to generate airflow, and a heater that is coupled to a portion of the rotating shaft between the blowing fan and the motor to rotate. A rotating magnet, a plurality of heating elements spaced apart from each other around the rotating magnet and generating eddy current and heat as the rotating magnet rotates, a plurality of heat transfer pipes extending from each of the heating elements toward the blower fan, It may include a plurality of heat sinks disposed in a direction perpendicular to the rotation axis and receiving heat from the heat transfer tubes.

Description

Low-power and high-efficiency heater for 1-ton electric trucks using eddy current}

The present invention relates to heaters, and more specifically, to low-power, high-efficiency heaters for 1-ton electric trucks using eddy currents.

In general, internal combustion engine vehicles use a heating method that uses heat generated from the engine to adjust the interior temperature when necessary.

However, since electric vehicles are not equipped with an engine to be used as a heat source, a heater must be used as a separate heat source.

As an example of a conventional heater for electric vehicles, there is Patent Publication No. 10-2020-0054598 (published on May 20, 2020, planar heating heater for electric vehicles).

The above published patent describes a configuration in which a planar heating element of a special shape is manufactured, the planar heating element is introduced into the side of the air supply passage, and the air is heated and then supplied to the guest room.

However, the conventional technology of generating heat using a planar heating element and exchanging heat with supplied air had the problem of requiring a lot of space for the heater to be installed due to the large area of the planar heating element.

In addition, since a planar heating element is used, temperature control is not easy, and problems such as relatively low electricity-heat generation efficiency are expected.

In particular, since electric vehicles run using battery power, there is a need to minimize power use, and therefore, the development of heaters that use lower power but have high heat exchange efficiency is required.

The technical problem to be solved by the present invention is to provide a low-power, high-efficiency heater for a 1-ton electric truck using eddy current that can increase energy efficiency by generating heat using the eddy current of a blowing motor.

Another purpose of the present invention is to provide a low-power, high-efficiency heater for a 1-ton electric truck using eddy current that has a more compact and lightweight structure and can easily control temperature.

The heater of the present invention to solve the above problems includes a motor that rotates a rotating shaft, a blowing fan that is coupled to the end of the rotating shaft and generates airflow while rotating, and a portion of the rotating shaft between the blowing fan and the motor. A rotating magnet that rotates, a plurality of heating elements arranged at a distance around the rotating magnet and generating eddy current and heat according to the rotation of the rotating magnet, and a plurality of heat transfer elements extending from each of the heating elements toward the blowing fan. It may include a tube and a plurality of heat sinks disposed in a direction perpendicular to the rotation axis and receiving heat from the heat transfer tubes.

In an embodiment of the present invention, the motor may include a magnetic pole and a slot defined in Equation 1 below.

[Equation 1]

P=S/3+2

P is the number of poles, S is the number of slots

In an embodiment of the present invention, the heat transfer tube may be filled with heat transfer oil.

In an embodiment of the present invention, the heat sink may have a ring-shaped structure.

In an embodiment of the present invention, the heating element may be made of copper, aluminum, or carbon.

In the present invention, a rotating magnet is added to a portion of the rotating shaft of a motor for blowing air, and a plurality of heating elements are arranged around the rotating magnet, and an eddy current is generated in each heating element due to a change in the magnetic field according to the rotation of the rotating magnet, thereby dissipating heat. By allowing it to be generated, there is an effect of supplying sufficient warm air while using low power.

The present invention has the effect of controlling the temperature easily by controlling the generation of eddy currents induced by controlling the rotational force of the motor.

Figure 1 is a projection perspective view of a low-power, high-efficiency heater for a 1-ton electric truck using eddy current according to a preferred embodiment of the present invention.
Figure 2 is a cross-sectional configuration diagram of the present invention.
Figure 3 is a front view of a heat sink applied to the present invention.

Hereinafter, the low-power, high-efficiency heater for a 1-ton electric truck using eddy current of the present invention will be described in detail with reference to the attached drawings.

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the embodiments described below may be modified into various other forms, and the embodiments of the present invention may be modified. The scope is not limited to the examples below. Rather, these examples are provided to make the present invention more faithful and complete and to fully convey the spirit of the present invention to those skilled in the art.

The terms used herein are used to describe specific embodiments and are not intended to limit the invention. As used herein, the singular forms include the plural forms unless the context clearly indicates otherwise. Additionally, when used herein, “comprise” and/or “comprising” means specifying the presence of stated features, numbers, steps, operations, members, elements and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements and/or groups. As used herein, the term “and/or” includes any one and all combinations of one or more of the listed items.

Although terms such as first, second, etc. are used herein to describe various members, regions, and/or portions, it is obvious that these members, parts, regions, layers, and/or portions are not limited by these terms. . These terms do not imply any particular order, superiority or inferiority, or superiority or inferiority, and are used only to distinguish one member, region or portion from another member, region or portion. Accordingly, a first member, region or portion described below may refer to a second member, region or portion without departing from the teachings of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to drawings schematically showing embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, for example, depending on manufacturing techniques and/or tolerances. Accordingly, embodiments of the present invention should not be construed as being limited to the specific shape of the area shown in this specification, but should include, for example, changes in shape resulting from manufacturing.

Figure 1 is a projected perspective view of a low-power, high-efficiency heater for a 1-ton electric truck using eddy current according to a preferred embodiment of the present invention, and Figure 2 is a cross-sectional configuration diagram.

Referring to Figures 1 and 2, respectively, the present invention includes a motor 10 and a blowing fan 40 that is coupled to the end of the rotation shaft 11 of the motor 10 and rotates with the rotation shaft 11 to perform blowing. ), a rotating magnet 20 coupled to a portion of the rotating shaft 11 between the motor 10 and the blowing fan 40 and rotating together with the rotating shaft 11, and a plurality of rotating magnets 20 arranged around the rotating magnet 20 A heating element 30 that generates heat by generating an eddy current according to a change in the magnetic field due to the rotation of the rotating magnet 20, and a rotating shaft 11 that protrudes from the heating element 30 toward the blowing fan 40. It is configured to include a heat transfer tube 31 protruding and extending in parallel, and ring-shaped heat sinks 50 arranged in a direction perpendicular to the rotation axis 11 and to which the heat transfer tubes 31 are coupled.

The unexplained symbol 60 is a housing, and 61 is a bearing that rotationally supports the rotation shaft 11.

Hereinafter, the configuration and operation of the low-power, high-efficiency heater for a 1-ton electric truck using eddy current according to a preferred embodiment of the present invention configured as described above will be described in more detail.

First, the motor 10 is driven and controlled by the motor control unit 12 and, for example, may be driven using power from the battery of an electric vehicle. It is appropriate that the motor 10 has a structure that reduces cogging torque.

For example, cogging torque can be reduced by adjusting the number of stator slots and the number of rotor poles and optimizing the distance between permanent magnets. This can increase output and efficiency even at low RPM.

For example, a motor 10 can be used in which the number of slots and the number of magnetic poles within the motor are specified in Equation 1 below.

[Equation 1]

P=S/3+2

P is the number of poles, S is the number of slots

The end of the rotation shaft 11 of the motor 10 is equipped with a blowing fan 40 that blows air from the heat sink 50 side to the interior of the electric vehicle. The motor 10 can rotate in only one direction.

A rotating magnet 20 is coupled to a portion of the rotating shaft 11 and rotates together with the rotating shaft 11.

As the rotating magnet 20 rotates, eddy currents are generated in the plurality of heating elements 30 spaced apart from each other around the rotating magnet 20. The heating element 30 may be made of metal with excellent electrical conductivity.

In the present invention, a plurality of heating elements 30 are used to reduce the size of the eddy current generated in each heating element 30, thereby facilitating control.

If the size of the eddy current is large, it is difficult to control it, and therefore it is not easy to control the temperature of each heating element 30.

In the present invention, the ring-shaped heating element 30 surrounding the entire circumference of the rotating magnet 20 is not used, but a plurality of independently arranged heating elements 30 are used to reduce the size of the eddy current generated in each heating element 30. can be reduced to facilitate temperature control.

As such, the present invention does not use separate power to generate heat, but generates an eddy current in the heating element 30 using the rotational force of the motor 10 for blowing, and uses the generation of heat resulting from the generation of the eddy current to heat the electric vehicle. Warm air can be supplied to the guest rooms.

Heat transfer pipes 31 may be connected to the heating elements 30, respectively. The heating element 30 can be made of copper, aluminum, carbon, etc., and the heat transfer pipe 31 can also be made of the same material.

The heat transfer tube 31 may be filled with heat transfer oil, etc. on the inside, making it easy to maintain heat.

The heat transfer pipe 31 is assumed to protrude toward the blowing fan 40 in parallel with the rotation axis 11.

Figure 3 is a front illustration of the heat sink 50.

Referring to FIG. 3, the heat sink 50 is a ring-shaped plate and has a plurality of through holes, and the heat transfer pipe 31 is inserted and fixed into each through hole.

Therefore, the heat of the heat transfer pipe 31 is transferred to the plurality of heat sinks 50, and the heat of the heat sinks 50 is exchanged with the airflow formed by the blowing fan 40.

In particular, the present invention can be installed in a relatively small space by using a plurality of heat sinks 50.

The heat sink 50 may be made of metal with excellent thermal conductivity.

As such, the present invention can increase the power efficiency of electric vehicles by not using separate power to generate heat, and improves the efficiency of the installation space by arranging multiple heat sinks between the blower fan 40 and the motor 10. You can do it.

It is obvious to those skilled in the art that the present invention is not limited to the above-mentioned embodiments and can be implemented with various modifications and variations without departing from the technical gist of the present invention. will be.

10: Motor 11: Rotation shaft
20: rotary magnet 30: heating element
31: heat transfer tube 40: blowing fan
50: heat sink

Claims (5)

A motor that rotates a rotating shaft;
A blowing fan coupled to the end of the rotating shaft and rotating to generate airflow;
a rotating magnet coupled to and rotating on a portion of the rotating shaft between the blowing fan and the motor;
A plurality of heating elements are arranged spaced apart around the rotating magnet and generate eddy current and heat according to the rotation of the rotating magnet;
a plurality of heat transfer pipes extending from each of the heating elements in the direction of the blowing fan; and
A heater including a plurality of heat sinks disposed in a direction perpendicular to the rotation axis and receiving heat from the heat transfer tubes. According to paragraph 1,
The motor is,
A heater including magnetic poles and slots defined in Equation 1 below.
[Equation 1]
P=S/3+2
P is the number of poles, S is the number of slots According to paragraph 1,
A heater characterized in that the heat transfer tube is filled with heat transfer oil. According to paragraph 1,
A heater, characterized in that the heat sink has a ring-shaped structure. According to paragraph 1,
The heating element is,
A heater characterized in that it is made of copper, aluminum or carbon.