KR100433941B1 - Case of fan coil unit electric motor - Google Patents

Abstract

The present invention provides a fan coil unit motor in which a rotor and a stator are installed inside a case to obtain power while rotating by their magnetic induction, wherein the case forming the outside of the motor does not use metal. The present invention relates to a case of a fan coil unit electric motor, which can be formed using engineering plastics to improve mechanical strength, smooth rotation of the motor, greatly reduce weight while having heat resistance, and facilitate manufacturing.

The present invention installs a rotor having a stator and a rotating shaft (3) inside the case (1) (2), the bearing insertion portion is supported on the support bracket (4) on both sides of the case (1) (2) (5) forming and inserting a bearing therein, wherein in manufacturing the case of the electric motor in which the rotating shaft (3) of the rotor is inserted and installed, the main material for manufacturing the case is polybutylene, which is engineering plastic It is configured to be prepared by mixing the reinforcing glass fiber with the lenterephthalate, and the mixing ratio of the polybutylene terephthalate and the reinforcing glass fiber is 85: 15% is configured to strengthen the strength of the case. .

Description

Fan coil unit motor case {CASE OF FAN COIL UNIT ELECTRIC MOTOR}

The present invention provides a fan coil unit motor in which a rotor and a stator are installed inside a case to obtain power while rotating by their magnetic induction, wherein the case forming the outside of the motor does not use metal. The present invention relates to a case of a fan coil unit electric motor, which can be formed using engineering plastics to improve mechanical strength, smooth rotation of the motor, greatly reduce weight while having heat resistance, and facilitate manufacturing.

Conventional general fan coil unit motor is provided with a stator and a rotor inside the case, and the rotating shaft is installed on the rotor, the bearing is installed on both ends of the rotating shaft to allow the rotor to rotate smoothly, The motor was installed to support the bracket, and the case was made of metal in consideration of mechanical strength, and the case of aluminum was widely used to reduce the weight of the metal.

However, in the case of the prior art as described above, since a heavy metal or expensive aluminum is used in manufacturing the case of the electric motor, there is a closed end that the motor itself becomes heavy and expensive. Since the process of casting or die casting is used to manufacture the case, the manufacturing becomes very difficult and there is a lot of manufacturing labor.

In addition, in the case of the metal case, if you do not pay considerable attention to its handling, there is a risk of being injured or injured. When high heat is generated in the electric motor, the high heat is transmitted to the case of the motor, so there is a risk of causing burns due to the high heat. There was a problem of lighting to install a separate insulator for insulation.

The present invention has been made in view of the above-described conventional problems, the present invention is a fan coil unit that the rotor and the stator is installed inside the case to obtain power while the rotation is made by their magnetic induction action In the motor, the case forming the outside of the motor is formed using engineering plastics without using metal, thereby improving mechanical strength, smoothly rotating the motor, and significantly reducing weight while having heat resistance. It is intended to provide a case of a fan coil unit electric motor to facilitate the bar, which will be described below in detail with reference to the accompanying drawings.

1 is a configuration diagram showing the configuration of the electric motor of the embodiment of the present invention

Explanation of symbols on the main parts of the drawing

1,2: Case

3: axis of rotation

4: support bracket

5: bearing insert

6: rib

Bearing inserts (5) are installed in the case (1) (2) and the rotor having a stator and a rotating shaft (3), and supported on the support bracket (4) on both sides of the case (1) (2) Forming and inserting the bearing therein, in the manufacturing of the case of the electric motor in which the rotating shaft (3) of the rotor is inserted into the installation, the main material for manufacturing the case is polybutylene terephthalate of engineering plastic It is configured to manufacture a case in which a plurality of ribs 6 are formed by mixing the reinforced glass fibers thereto.

In addition, the mixing ratio of the polybutylene terephthalate and the reinforced glass fiber is 85: 15% is configured to strengthen the strength of the case.

The present invention as described above is provided with a rotor having a stator and a rotating shaft (3) inside the case (1) (2), the support (4) is installed on both sides of the case (1) (2) In the case of manufacturing a case of an electric motor in which a bearing insertion portion 5 is formed to insert and install a bearing, and the rotary shaft 3 of the rotor is inserted into the bearing, the main material for manufacturing the case is an engineering plastic. The polybutylene terephthalate is provided, and the reinforcing glass fibers are mixed at a ratio of 85: 15%, respectively, and then manufactured by forming a plurality of ribs 6 on the outside using the mixed material. By manufacturing the case of the electric motor by using the engineering plastic of the polybutylene terephthalate it is possible to greatly improve the formability of the case, The low hygroscopicity of ributylene terephthalate and stable physical properties without electrical or mechanical change can be maintained, and the reinforcing glass fiber, which is a reinforcing agent, can be used to greatly enhance the mechanical rigidity and excellent heat resistance at high temperatures. In addition, the resistivity of the chemicals is very high, and the physical properties of the polybutylene terephthalate and a comparison table comparing the mixed agent with nonferrous metal aluminum are shown below.

<Table 1 Comparison table of physical properties of polybutylene terephthalate>

Item Dimension unit Standard grade Flame retardant Glass fiber reinforced grade (15%) Reinforcement and flame retardation (15%) Physical properties importance D792 · 1.3 1.41 1.45 1.53 Water absorption D570 % 0.08 0.06 0.06 0.06 Mold export rate D955 % 1.7-2.3 1.8-2.6 0.7-1.0 0.6-1.4 Coefficient of linear expansion D696 Cm / cm ° C (X10 ⁵ ) 8 7 4 4 Thermal Melting point DSC ℃ 224 224 224 224 Mechanical properties The tensile strength D638 ℃ 600 650 980 950 Shinto D638 Kg / ㎠ 200 30 7 7 Flexural strength D790 % 900 1200 1600 1700 Flexural modulus D790 Kg / ㎠X10 ³ 25 31 65 56 Impact strength D2561 Kg.cm/cm 4 4 7 6 Hardness D785 Rockwell R-SCALE 118 119 119 119 Electrical properties Arc resistance D495 SEC 120 85 120 120 Breakdown voltage D149 KV · mm 28 25 30 26

<Table 2 Comparison of Properties of Polybutylene Terephthalate and Reinforced Glass Fiber and Nonferrous Metals>

Item unit Glass Fiber Reinforced PBT Aluminum Die Casting Properties importance * 1.5-1.6 2.7 The tensile strength Kg / mm2 13.5-14 34 Melting point ℃ 224 580 Characteristics Sound absorption * ○ △ Corrosion resistance * ○ △ Oil resistance * △ ○ Hygroscopic * ○ ○ Insulation * ◎ X Surface properties * ○ △ Heat resistant * ○ ◎ productivity ○ △

(Legend: ◎: Very good, ○: Good, △: Normal, X: Very bad)

According to the above characteristics comparison, when manufacturing the electric motor case made of the polybutylene terephthalate and reinforced glass fibers, molding as well as the rigidity, heat resistance and excellent insulation than conventional non-ferrous metal or metal case Sex can be good.

In the present invention as described above, in manufacturing the case of the fan coil unit electric motor as described above, by making the case using a material mixed with polybutylene terephthalate and reinforced glass fiber to facilitate the manufacture of the case It is possible to manufacture the case in a precise state while greatly improving the productivity, it is possible to manufacture by using the material can significantly improve the heat resistance and stiffness and chemical resistance while lowering the moisture absorption rate, The insulation of the electric motor can be greatly improved by the insulation of the case itself even without the insulation means, and it has the feature of lighting that can greatly reduce the manufacturing labor.

Claims (2)

A rotor having a stator and a rotating shaft 3 is installed inside the cases 1 and 2, and bearing inserts 5 which are supported on the support bracket 4 are formed on both sides of the cases 1 and 2. In this case, the bearing is inserted into the bearing, and the rotating shaft 3 of the rotor is inserted into and installed in the bearing, and in the case of the fan coil unit electric motor such that a plurality of ribs 6 are formed, The main material for manufacturing the case is a polybutylene terephthalate, which is an engineering plastic, and a case of a fan coil unit electric motor, characterized in that manufactured by mixing a reinforced glass fiber thereto. The method of claim 1, The mixing ratio of the polybutylene terephthalate and reinforced glass fiber is 85: 15% of the case of the fan coil unit motor, characterized in that configured to enhance the strength of the case.