Overload protection device, electric compressor and refrigerating air-conditioner apparatus

An overload protection and motion device technology, applied in the field of electric compressors, refrigeration and air conditioning devices, and overload protection devices, can solve problems such as reducing coil resistance, increasing current, and welding, achieving reliable current cutoff and preventing arc generation. , The effect of reliable current cut off

Inactive Publication Date: 2003-01-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, after the above-mentioned thermal induction motion plate 9c recovers, if the above-mentioned abnormality is not normalized and the abnormality continues, the thermal induction motion plate 9c repeatedly operates and recovers, and finally the thermal induction motion plate 9c is fatigued and damaged, resulting in a movable The contact 9b is welded to each fixed contact 9f
This kind of cont...

Method used

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  • Overload protection device, electric compressor and refrigerating air-conditioner apparatus
  • Overload protection device, electric compressor and refrigerating air-conditioner apparatus
  • Overload protection device, electric compressor and refrigerating air-conditioner apparatus

Examples

Experimental program
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Embodiment approach 1

[0082] Next, explain Figure 1 ~ Figure 7 The overload protection device of Embodiment 1 of the present invention is shown. figure 1 It is a schematic diagram showing the connection of the overload protection device to the control circuit of the refrigeration and air-conditioning unit, figure 2 It is a schematic diagram showing that the overload protection device is installed on the outer surface of the electric compressor, image 3 It is a circuit diagram for a single-phase power supply assembled with an overload protection device, Figure 4 It is a circuit diagram for a three-phase power supply assembled with an overload protection device, Figure 5 Is a longitudinal section view of the overload protection device, Figure 6 Is viewed from below Figure 5 A view of the I-I section, Figure 7 Viewed from above Figure 5 A view of the II-II section.

[0083] In these figures, 1 is a hermetic electric compressor with a built-in electric motor 1c composed of a main coil 1a and an a...

Embodiment approach 2

[0108] Fig. 8 is a longitudinal sectional view of an overload protection device according to Embodiment 2 of the present invention, Picture 9 It is a schematic view of the section III-III of Fig. 8 viewed from below, Picture 10 It is the IV-IV cross-sectional view of Fig. 8 viewed from above. In the figure, 7 is a storage container, which is composed of a container 7a and a lid 7b, and is formed of a heat-resistant insulating material such as synthetic resin. 9 is a first heat-sensitive motion device that is reversibly supported and fixed by a central fixed shaft 9a in the container 7, and is composed of a disc-shaped heat-sensitive motion plate 9c having a pair of movable contacts 9b and corresponding to the above-mentioned movable A pair of fixed contacts 9f provided as a contact 9b is configured, and the fixed contact 9f is fixed to a fixed terminal 9e penetratingly attached to an arbitrary position on the inner bottom surface 7c of the container 7a.

[0109] 13 is a linear h...

Embodiment approach 3

[0117] In the first and second embodiments, the overload protection device 30 installed on the outside of the airtight container 1d of the compressor or used in the control circuit 5 of the refrigerating and air-conditioning unit is described. However, in the third embodiment of the present invention, Here, the overload protection device 30 used in the airtight container 1d of the compressor will be described.

[0118] Picture 11 It is a schematic diagram of the overload protection device of the third embodiment of the present invention mounted on the motor coil in the electric compressor, Picture 12 It is a schematic view showing that the overload protection device is mounted on the glass sealed terminal 4 part on the inner upper surface of the airtight container 1d of the electric compressor. In addition, Figure 13 Is a side view showing the overload protection device of the third embodiment of the present invention, Figure 14 Is a plan view showing the overload protection ...

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PUM

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Abstract

The existing porblems of prior overload protecting device are as follows: the metal of the fusion device melts or evaporate by electric energy or others, then diffuses into the container, and the generation of an arc leads to large-scale current in the motor of compressor,thereby the compressor may be burned-out and damaged. This is the overload-protecting device provide with the first heat-reacting device 9 for overload current protection to make a movable contact point 9b move by deformation due to the temperature of the heat-reacting plate 9c and to have a fixed contact point 9f paired with its movable contact point 9b, with the current fuse means 10 to carry out interruption of the current by fusing due to its self-oxoterm by the current, and with a housing container 7 to wire-connect and to house the heat-reacting device 9 and the current fuse means 10 in a series circuit, and this is made to be constituted, so that a shielding member 12 is installed to separate a space at which the current fuse means 10 is installed from a space at which the first heat-reacting device 9 is installed.

Description

Technical field [0001] The present invention relates to an overload protection device, an electric compressor and a refrigerating and air-conditioning device, in particular to an overload protection device using a heat-sensitive moving body, an electric compressor and a refrigerating and air-conditioning device using such an overload protection device. Background technique [0002] Figure 26 This is, for example, a longitudinal sectional view of a conventional overload protection device disclosed in Japanese Patent Application Laid-Open No. 64-2232. Figure 27 Yes Figure 26 Sectional view of VI-VI. As shown in the figure, in the conventional overload protection device, in the space of the container 7 enclosed by the container 7a and the cover 7b made of heat-resistant insulating material such as synthetic resin, it is fixed to the bottom surface 7c of the container 7 by penetrating The shaft 9a is reversibly supported by a disc-shaped heat-sensitive moving plate 9c. A movable ...

Claims

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Application Information

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IPC IPC(8): F04B39/00F04B49/10F25B49/02H01H37/32H01H37/54H01H81/02H01H85/00H01H85/38H02H7/085
Inventor 加藤太郎穐山和之三桥孝夫
Owner MITSUBISHI ELECTRIC CORP
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