JPH04124851U - Stator of refrigerator motor - Google Patents

Abstract

(57) [Summary] [Purpose] Dichlorotrifluoroethane (R
-123) A stator for a refrigerator motor is provided. [Structure] A wedge made of a phenolic resin plate containing a base material is used as a wedge for each slot of a stator core in which stator windings of a refrigerator motor are housed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the stator of a refrigerator motor, and is particularly concerned with dichloromethane as a refrigerant. A cooling system that can use refluoroethane (hereinafter referred to as R-123) This invention relates to a stator for a freezing machine electric motor.

0002

[Conventional technology]

Conventional refrigerators use a centrifugal compressor, condenser, and pressure reducer driven by an electric motor. It consists of equipment, evaporators, and piping routes that connect these devices. The electric motor is cooled with the same refrigerant as the refrigerant circulating inside the device, Trichloromonofluoromethane (hereinafter referred to as R-11) is used as this refrigerant. It was

0003

[Problem that the idea aims to solve]

By the way, this R-11 has the problem of destroying the ozone layer in the stratosphere, and is Regulations are being implemented worldwide. R-123 is being researched as a candidate for an alternative refrigerant, but this refrigerant is stator windings of motors to melt the wedges and reduce mechanical strength. The insulation is damaged by electromagnetic vibration, causing a breakdown accident. There were drawbacks. Therefore, R-123 can be used as a refrigerant that does not destroy the ozone layer in the stratosphere. The problem is that although it is useful for this type of use, it cannot be used immediately for this kind of purpose. There was a point. The present invention is an electric motor for refrigerators that solves the above-mentioned issues (problems) of conventional ones. The purpose is to provide machine stators.

0004

[Means to solve the problem]

The present invention uses R-123 as a refrigerant for a refrigerator motor, and the stator of the motor is For R-123 as a wedge for each slot of the stator core where the windings are stored. We recommend using wedges made of phenolic resin plates with a highly resistant base material. The present invention relates to a stator for a refrigerator motor configured as follows.

[0005]

[Effect]

In this invention, we use a phenolic resin plate with a base material that has high resistance to R-123. Because we used a wedge made of This allows the stator windings to be firmly supported (fixed) continuously. Therefore, the stator winding has less damage to the insulation due to electromagnetic vibration and less damage due to insulation breakdown. It will not cause any damage.

[0006]

【Example】

The present invention will be specifically explained below with reference to an embodiment of the present invention shown in FIGS. 1 and 2. First, a schematic configuration of a refrigerator to which the present invention is applied will be explained with reference to FIG. In the same figure 1 is a centrifugal compressor, 2 is a condenser, 3 is a pressure reducing device, and 4 is an evaporator. this The centrifugal compressor 1, condenser 2, pressure reducing device 3, and evaporator 4 are connected by a refrigerant path. It forms a refrigerant circulation flow path. In the refrigerator with the above configuration, the refrigerant gas compressed by the compressor 1 is transferred to the condenser 2. It is cooled and condensed by the load fluid sent from the flow path 5, and the pressure is reduced by the pressure reducing device 3. After that, it reaches the evaporator 4. In the evaporator 4, the heat source fluid sent from the flow path 6 is heated and evaporated, returns to the centrifugal compressor 1, and is used in the heat pump system of the refrigerator. Configure the system. On the other hand, the load fluid flowing through the flow path 5 is heated in the condenser 2, and the load fluid flows through the flow path 5. (not shown). In this refrigerator, R-123 is used as a refrigerant. In addition, some of the R-123 liquid condensed in the condenser is transferred to the electric motor by the refrigerant pump. The refrigerant itself is heated, evaporates, and cools the stator windings 9 of the motor. It returns to the condenser 2 again.

[0007] By the way, as mentioned above, the refrigerant R-123 may dissolve the wedge or Since it has the property of reducing the mechanical strength of There is. Figure 2 shows one slot of the stator core 10 in which the stator winding 9 of the electric motor 8 is housed. This shows the slots 11, in order to fix the stator windings 9 to each slot 11. The wedge 12 provided in the A structural feature of the present invention is that it is constructed from an phenol resin plate. In addition to the paper-based phenolic resin board, there are also glass fiber-filled phenolic resin boards. In short, any phenol resin board containing a fibrous base material is sufficient.

[0008] In the above configuration, the refrigerant R-123 liquid is near the stator winding 9 of the motor 8. When passing through a conventional wedge, the wedge may be melted or its mechanical strength may be weakened. There was a risk that the effect of firmly supporting (fixing) the stator windings would deteriorate. However, the wedge 12 of the present invention uses a wedge that has high resistance to R-123. Wedge 12 is R-123 because it uses a phenolic resin board with a base material. This prevents erosion from occurring. Therefore, even if the stator winding is subjected to electromagnetic vibration, the wedge 12 Retained.

[0009]

[Effect of the idea]

The present invention is designed as a wedge in which the stator winding of a refrigerator motor is housed as described above. This method uses a phenolic resin board containing a base material, so the following Has excellent effects. Because R-123 does not melt the wedge or reduce its mechanical strength. , there is little damage to the insulation due to electromagnetic vibration of the stator winding, and therefore there is no risk of insulation breakdown accidents. It's gone. When using R-123 as a refrigerant, it is similar to the conventional refrigerant R-11. It can also prevent the problem of depleting the ozone layer in the atmosphere.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a refrigerator to which the present invention is applied together with a refrigerant path.

FIG. 2 is a longitudinal sectional front view of essential parts showing an embodiment of the present invention.

[Explanation of symbols]

8: Electric motor 9: Stator winding 10: Stator core 11: Slot 12: Wedge

Claims (1)

[Scope of utility model registration request] 1. Dichlorotrifluoroethane is used as a refrigerant in an electric motor for a refrigerator, and each slot of a stator core in which the stator windings of the electric motor are housed is wedged by a phenol resin plate containing a base material. A stator for an electric motor for a refrigerator, characterized in that the stator uses the following.