JPH07236244A - Enclosed refrigerant compressor - Google Patents

Abstract

PURPOSE:To secure a stator winding easily without requiring any wire material. CONSTITUTION:Stator windings 5, 6 applied with thermally fusible coating are employed in a stator 7 constituting a motor element of an enclosed refrigerant compressor. After forming the coil end, the stator windings 5, 6 are self- fused thermally thus securing the stator windings 5, 6 without using any wire material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in a hermetically sealed container, and more particularly to molding of stator windings.

[0002]

2. Description of the Related Art Conventionally, a refrigerating cycle is provided with a compressor for circulating a refrigerant. As an example of such a compressor, a compressor element such as a piston and a stator winding are provided in a closed container. There is a hermetically sealed refrigerant compressor that houses a wire-wound stator and a motor element such as a rotor that rotates inside the stator.

By the way, in such a hermetic refrigerant compressor, when the winding is wound around the slot formed in the field iron core to form the stator, it is only necessary to wind the winding around the field iron core. Since the winding portion protruding to the outside of the stator body (hereinafter referred to as the coil end) is separated, the main winding 1 and the auxiliary winding 2 are connected by the wire 3 which is a binding member as shown in FIGS. Bind, so-called racing, main and auxiliary windings 1,2
It is fixed so that there is no slack.

Then, in this way, the main and auxiliary windings 1 and 2 are
Is fixed by lacing to prevent noise and the like due to vibration of the main and auxiliary windings 1 and 2. Further, conventionally, after fixing the main and auxiliary windings 1 and 2 by lacing as described above, a varnish process is performed to prevent the main and auxiliary windings 1 and 2 from vibrating.

In FIGS. 4 and 5, reference numeral 4 indicates the main winding 1 due to an overcurrent generated in, for example, an overload state or a locked state.
Is a thermal protector which is connected in series to the main winding 1 to prevent the burnout of the core and is thermally coupled to the main winding 1. The thermal protector 4 is also fixed by the wire rod 3. There is.

[0006]

However, in the conventional hermetic refrigerant compressor in which the stator is formed in this way, not only is it troublesome to perform the racing, but the wire rod for the racing is It may melt when it comes into contact with the refrigerant, and it may solidify during refrigerant compression and adhere to the vicinity of the refrigerant outlet of the compressor. If the wire material adheres to the vicinity of the refrigerant outlet as described above, the piston may be damaged, or the compressor may be damaged by being overloaded.

Therefore, it is possible to remove the wire after performing the varnish treatment to prevent this problem, but it takes a lot of time to remove the wire after performing the varnish treatment once, so that it is conventionally required. The current situation is that the problems caused by the hardened wire rods have not been carried out and are left as they are.

Therefore, the present invention has been made to solve the above problems, and provides a hermetic refrigerant compressor capable of easily fixing a stator winding without using a wire rod. The purpose is to do.

[0009]

According to the present invention, in a hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in a hermetic container, a stator constituting the electric motor element is provided with a heat-sealable coating. The formed stator winding is used to shape the coil end, and then the stator winding is self-bonded by heat.

Further, according to the present invention, in a hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in a hermetic container, a stator constituting the electric motor element has a stator winding coated with a heat-fusible coating. After shaping the coil end using a wire, the stator winding is self-fused with heat, and a protective device is fixed to the coil end of the stator winding with a binding member.

Further, according to the present invention, in a hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in a hermetically sealed container, the stator constituting the electric motor element uses a stator winding formed by varnishing in a dry state. After shaping the coil end, the stator winding is self-fused with heat, and a protective device is fixed to the coil end of the stator winding with a binding member.

[0012]

According to the first aspect of the present invention, the stator windings having the heat-welding coating are used for the stator constituting the electric motor element housed in the hermetic container of the hermetic refrigerant compressor, and After shaping the coil ends, the stator winding can be fixed by self-fusing the stator winding with heat.

According to the second aspect of the present invention, a stator winding having a heat-sealable coating is used for the stator, and after shaping the coil end, the stator winding is self-sealed by heat. By doing so, the stator winding can be fixed. Further, the protection device for protecting the hermetic refrigerant compressor can be fixed to the coil end by the binding member.

According to the third aspect of the present invention, the stator winding is formed by varnishing the stator dry, and after the coil end is shaped, the stator winding is heat-fused to fix the stator winding. The child winding can be fixed. Further, the protection device for protecting the hermetic refrigerant compressor can be fixed to the coil end by the binding member.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a hermetic refrigerant compressor according to an embodiment of the present invention, and FIG. 2 is a side view thereof. In FIGS. 1 and 2, the same reference numerals as those in FIGS. 4 and 5 indicate the same or corresponding portions.

In FIGS. 1 and 2, reference numeral 5 is a main winding having a heat-fusible coating, and 6 is an auxiliary winding having a heat-fusible coating. In addition, 7 is obtained by winding the main and auxiliary windings 5 and 6 having a heat-fusible coating on slots (not shown) formed in the field core 7a, and then heating the main and auxiliary windings 5 and 6. , A stator formed by self-fusion. In FIG. 1, reference numeral 4a is a connector attached to the thermal protector 4.

Here, the heat-fusible coating of the main and auxiliary windings 5 and 6 is formed by applying a dry varnish to the circumferential surface of the enamel on the winding surface. Then, when the raw dry varnish is heated, the adjacent varnishes are solidified, whereby the main and auxiliary windings 5 and 6 are self-bonded.

By the way, in forming the stator 7, main and auxiliary windings 5 and 6 are wound, and the main and auxiliary windings 5 and 6 are wound.
After the stator 7 having the coil ends 6 separated from each other is attached to the stator forming mold 8 as shown in FIG.
The winding forming die 10 is set in the rotor insertion hole 9 formed in the center of the. As a result, the coil ends of the main and auxiliary windings 5 and 6 in the separated state are shaped so as to be in close contact with each other and annularly protrude from both sides of the stator 7.

Then, after that, when the stator forming die 8 and the winding forming die 10 are heated, the coatings on the surfaces of the respective main and auxiliary windings 5 and 6 adhered to each other are thermally fused. Therefore, the main winding 5 and the auxiliary winding 6 are fixed. The portions of the main and auxiliary windings 5 and 6 inside the stator 7 are also self-fused in the same manner, but they are also fixed by fusion with a slot insulator (not shown) made of resin disposed in the slot. It is supposed to be done.

In this way, the main and auxiliary windings 5 and 6 wound around the stator 7 are coated with a heat-fusible material, and the main and auxiliary windings 5 and 6 are heated when the stator is formed. Thus, the main and auxiliary windings 5 and 6 can be fixed without using the wire rod 3. As a result, the labor of racing can be saved, and the cost and process for forming the stator can be reduced.

By the way, when the thermal protector 4 is attached to the main winding 5 coated with such a heat-fusible coating, the main winding 5 cannot be fused to the thermal protector 4. As shown in FIG. 2, only the portion of the main winding 5 to which the thermal protector 4 is attached is fixed by the wire rod 3.

Even when the thermal protector 4 is attached to the main winding 5 in this way, the amount of the wire 3 used is minimized by using the wire 3 only in the portion of the main winding 5 to which the thermal protector 4 is attached. Try to keep it below. As a result, the amount of the wire rod 3 that melts upon contact with the refrigerant can be reduced, and the possibility that the wire rod will adhere to the refrigerant outlet of the compressor can be reduced.

[0024]

As described above, according to the present invention, a wire having a heat-fusible coating is applied to the stator winding and the stator winding is heated and self-adhesive when the stator is formed. It is possible to easily fix the stator winding without using. Further, even when the thermal protector is attached to the stator winding, the wire rod can be used only in the winding portion to which the thermal protector is attached, so that the amount of the wire rod to be used can be minimized.

[Brief description of drawings]

FIG. 1 is a front view of a stator of a hermetic refrigerant compressor according to an embodiment of the present invention.

FIG. 2 is a side view of the stator.

FIG. 3 is a view showing a state in which the stator is formed by a mold for forming the stator.

FIG. 4 is a front view of a stator of a conventional hermetic refrigerant compressor.

FIG. 5 is a side view of the stator.

[Explanation of symbols]

 1,5 Main winding 2,6 Auxiliary winding 3 Wire rod 4 Thermal protector

Claims (3)

[Claims] 1. A hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in an airtight container, wherein a stator winding forming a heat-welding coating is used as a stator constituting the electric motor element. A hermetically sealed refrigerant compressor, wherein the stator winding is self-bonded by heat after shaping the coil end. 2. A hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in an airtight container, wherein a stator winding forming a heat-sealable coating is used as a stator constituting the electric motor element. After shaping the coil end, the stator winding is self-fused with heat, and a protective device is fixed to the coil end of the stator winding with a binding member. 3. A hermetic refrigerant compressor in which a compressor element and an electric motor element are housed in an airtight container, wherein a stator constituting the electric motor element uses a stator winding formed by varnishing with a dry cloth, and a coil end. After shaping, the stator winding is self-fused with heat, and a protective device is fixed to the coil end of the stator winding with a binding member.