JP2001248574A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor easily installable inside a refrigerator and the like by omitting a projection part and the like because of a temperature detection means from the compressor outside diameter. SOLUTION: A temperature sensor 16 is arranged in a discharge chamber part 8. In this way, a partially projecting part conventionally constructed for the temperature sensor 16 is dispensed with, so that the compressor 1 can be easily arranged inside the refrigerator and the like. Because a sensor mounting seat 15 is also dispensable in a housing 13 for a motor part 10, the housing 13 can be provided with a compact outline with a good-yield shape and can be reduced in weight. In addition, a cost can be lowered because machining for a seat face and a screw hole is not required. Although a compressor temperature is detected via the housing 13 in the motor part 10 conventionally, in this compressor, a refrigerant temperature governing a compressor temperature can be directly detected because the temperature detection means is arranged in the discharge chamber part, and consequently, temperature detection sensitivity can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used for a refrigerating apparatus and the like, and more particularly, to a structure for mounting a temperature detecting means for detecting a temperature of the compressor.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. 7-35080
As disclosed in Japanese Patent Application Laid-Open Publication No. H11-209, there has been proposed a configuration in which a temperature detecting means (temperature sensor) is provided on an outer surface of a housing of a motor unit. FIG. 3 shows a structural diagram of a conventional scroll compressor. A sensor mounting seat 15 is provided on a housing 13 of the motor unit 10, and a temperature sensor 16 is screwed and fixed.

[0003]

However, the structure of such a temperature sensor has a portion that protrudes only partially from the outer diameter of the compressor, which hinders the compact arrangement of the compressor inside a refrigerator or the like. It has become.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and there is provided a scroll compressor which is easy to arrange inside a refrigerating apparatus or the like by eliminating a protrusion or the like by a temperature detecting means on the outer diameter of the compressor. The purpose is to provide.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a discharge chamber (8) is provided.
And a temperature detecting means (16).

As a result, there is no longer any protruding portion due to the temperature detecting means, which has conventionally been formed so as to partially protrude from the outer diameter of the compressor, and it is easy to arrange the compressor inside a refrigerating device or the like.

[0007] Further, since the seat for attaching the temperature detecting means is not required in the housing of the compressor, the outer shape of the housing is small, has a good yield, and is lightweight. Further, since the machining of the seat surface and the screw hole is not required, the cost can be suppressed.

Conventionally, the temperature of the compressor is detected through the housing of the compressor. On the other hand, in the present invention, the temperature of the refrigerant controlling the temperature of the compressor is controlled by providing the temperature detecting means in the discharge chamber. Direct detection is possible, and the sensitivity of temperature detection can be improved.

According to a second aspect of the present invention, the lid member (9) of the discharge chamber (8) and the temperature detector container (51) of the temperature detector (16) are integrated.

This eliminates the need for a temperature detector container dedicated to temperature detecting means, an O-ring for sealing, and the like as components, and also eliminates the need for processing and work for assembling them, thereby reducing costs. Can be.

Conventionally, the temperature detecting container is made of a material such as brass, and there is a possibility of causing electrical corrosion between the temperature detecting container and a compressor housing made of aluminum or the like. However, since a rear plate (cover member) made of aluminum or the like is also used as the temperature detecting container, it is possible to prevent the occurrence of electric corrosion.

According to a third aspect of the present invention, the temperature detecting means (16) is provided so as to protrude into the space of the discharge chamber (8).

Thus, the shape of the temperature detector container provided on the rear plate may be such that the flat plate is pressed and depressed, so that the processing is easy and the cost can be reduced. Since there is no protruding portion, it is easy to arrange the compressor inside a refrigeration system or the like.

According to a fourth aspect of the present invention, the scroll compressor (1) is electrically driven.

The present invention is not limited to an electric scroll compressor, but is applicable to a scroll compressor mounted on a vehicle or the like and driven by an engine. In many scroll compressors, a rear plate and a mounting bracket are used as a single unit.

In this type, the rear plate becomes large and the number of types increases in accordance with the size of the compressor and the vehicle to be mounted. Therefore, the advantage obtained by integrating the above-described rear plate and the temperature detecting means is obtained. It is hard to be.

On the other hand, since the electric scroll compressor used in the home refrigeration system is held by the motor unit, the rear plate only needs to have a small lid function, and the rear plate is integrated with the temperature detecting container and both are integrated. Is easy, and the above-mentioned advantages are easily obtained.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to an electric scroll compressor will be described with reference to the drawings.
FIG. 1 is a configuration diagram of the scroll compressor and the refrigeration cycle.

First, a scroll compressor 1 compresses a refrigerant to a high temperature and a high pressure, and a pump unit 2 for compressing the refrigerant.
And a motor unit 10 for rotating it. The pump unit 2 forms a hermetically sealed container by the shell 4 which is a housing on the pump side and the housing 13 which is a motor unit. Reference numeral 6 denotes an O-ring for keeping the seal of the closed container.

Reference numeral 4a denotes a fixed-side scroll (fixed scroll) integrally formed inside the shell 4;
A scroll compression mechanism is formed by the movable side spiral body (movable scroll) 5 which is swung by.

When the power from the power supply 11 is converted from direct current to alternating current by an inverter (not shown) and supplied to the motor unit 10, the rotor 12 rotates, and the movable scroll 5 is transferred to the fixed scroll 4a in a state where rotation is prevented. Revolves around.
As a result, the volume of the space partitioned by the scrolls 4 a and 5 changes, and the refrigerant is sucked from the suction port 3 and compressed.

The compressed refrigerant pushes and opens the discharge valve 7 from the center of the fixed scroll 4a, and is discharged into the discharge chamber section 8. The space formed when the discharge chamber section 8 is closed by the rear plate (cover member) 9 serves to reduce the pulsation and noise of the refrigerant. Also, the rear plate 9
The discharge chamber portion 8 covered by the above is also a port for assembling the discharge valve 7.

In the present invention, a temperature sensor 16 for detecting the temperature of the refrigerant is provided in the discharge chamber section 8. As a result, the temperature sensor (temperature detecting means) 16 which has conventionally only partially protruded from the outer diameter of the compressor is eliminated, and the compressor 1 can be easily arranged inside a refrigerating device or the like.

Further, since the seat 15 for mounting the sensor is not required in the housing 13 of the motor unit 10, the outer shape of the housing 13 is small, has a good yield, and is lightweight. Further, since the machining of the seat surface and the screw hole is not required, the cost can be suppressed.

Conventionally, the housing 1 of the motor unit 10
3, the temperature of the refrigerant controlling the compressor temperature can be directly detected because the temperature sensor is provided in the discharge chamber, and the sensitivity of the temperature detection can be improved. .

In FIG. 1, the temperature sensor 16 protrudes largely at the center of the discharge chamber 8, but actually protrudes slightly at a position offset from the center to interfere with the discharge valve 7, And does not impair the operation of the chamber.

Further, the refrigerant is supplied from the pump section 2 to the motor section 10.
And is discharged from the discharge port 14.

The configuration of the remaining refrigeration cycle is well known. Reference numeral 20 denotes a condenser, which introduces a gas refrigerant discharged from the scroll compressor 1 and condenses it by exchanging heat with outside air blown by a cooling fan (not shown). Reference numeral 30 denotes a liquid receiver (receiver),
Is separated into a liquid refrigerant and a gas refrigerant, and the liquid refrigerant is stored.

An expansion valve 41 reduces the pressure of the liquid refrigerant from the receiver 30 to a low-pressure gas-liquid two-phase refrigerant. Reference numeral 40 denotes an evaporator (evaporator) for evaporating the low-pressure refrigerant after decompression by exchanging heat with conditioned air blown by a blower (not shown).

The expansion valve 41 senses the temperature of the refrigerant at the outlet of the evaporator 40 by the temperature sensing part 42 and automatically adjusts the valve opening so that the degree of heating of the refrigerant is maintained at a predetermined value. The gas refrigerant evaporated by the evaporator 40 is sucked into the scroll compressor 1 again to form a refrigeration cycle.

Next, the temperature sensor (temperature detecting means) 16 which is a main part of the present invention will be described. FIG. 2 is a structural diagram of a temperature sensor according to an embodiment of the present invention.

3A shows a temperature sensor 16 which is conventionally provided with a seat 15 provided on the outer surface of a motor unit 10 and mounted with a screw hole provided in a rear plate 9. FIG. The structure of the temperature sensor 16 is such that a temperature detecting element 52 such as a thermistor is provided at the bottom of the depression of the sensor housing (temperature detecting container) 51.
Is installed, and the wire and the connector 53 are pulled out,
The inside of the depression is sealed with a potting material 54. Reference numeral 55 denotes an O-ring that seals refrigerant leakage from the screw portion.

Thus, the temperature change sensed via the sensor housing 51 is converted into a resistance change by the thermistor 52 and detected. This configuration allows one type of temperature sensor 16 to be used in common, even if the rear plate 9 has various types depending on the size of the compressor 1 or the like.

FIG. 3B shows a structure in which the rear plate 9 serving as a cover member of the discharge chamber 8 and the sensor housing 51 of the temperature sensor 16 are integrally formed and shared.

This eliminates the need for the sensor housing 51, the O-ring 55 for sealing, and the like as components, and also eliminates the need for processing and work for assembling them, thereby reducing costs.

Conventionally, the sensor housing 51 is made of a material such as brass, and there is a possibility that electric corrosion occurs between the sensor housing 51 and the housing 13 of the motor unit 10 made of aluminum or the like. However, since the rear plate 9 made of aluminum miniature or the like is also used as the sensor housing 51, it is possible to prevent a situation that causes electric corrosion.

FIG. 3C shows a configuration in which the temperature sensor 16 is provided so as to protrude into the space of the discharge chamber section 8. Accordingly, the shape of the sensor housing 51 provided on the rear plate 9 may be a shape of simply pressing and depressing a flat plate, so that the processing is easy and the cost can be reduced, and the sensor housing 51 projects to the outer surface side of the rear plate 9. Since there is no portion, the compressor 1 can be easily arranged inside a refrigeration apparatus or the like.

These are not limited to the configuration of the electric scroll compressor 1, but can also be applied to the scroll compressor 1 mounted on a vehicle or the like and driven by an engine. In the scroll compressor 1, there are many types in which the rear plate 9 and the mounting bracket are integrated and both are used.

In this type, since the rear plate 9 is large and the number of types is large depending on the size of the compressor 1 and the vehicle to be mounted, the above-described rear plate 9 and the temperature sensor 16 are integrated. It is difficult to obtain advantages.

On the other hand, since the electric scroll compressor 1 used in a home refrigeration system or the like is held by the motor unit 10, the rear plate 9 has only a small lid function, and is integrated with the sensor housing 51. Therefore, it is easy to use both of them, and it is easy to obtain the above-mentioned advantages.

(Other Embodiments) The temperature sensor 16 is not limited to the thermistor type, but may be a switch type of a bimetal type. Further, if the lid of the discharge chamber section 8 can be formed only by the temperature sensor 16, a configuration without the rear plate 9 may be employed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a scroll compressor and a refrigeration cycle according to an embodiment of the present invention.

FIGS. 2A, 2B, and 2C are structural diagrams of a temperature sensor according to an embodiment of the present invention.

FIG. 3 is a structural diagram of a conventional scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Pump part 4 Shell (closed container) 4a Fixed scroll (fixed-side spiral body) 8 Discharge chamber part 9 Rear plate (lid member) 16 Temperature sensor (temperature detecting means) 51 Sensor housing (temperature detecting container)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norihiro Umihara 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (reference) 3H029 AA02 AA16 AB03 BB32 BB60 CC27 CC56 3H039 AA02 AA12 BB08

Claims (4)

[Claims] 1. A shell-integrated scroll compressor in which a shell (4) serving as a closed container of a pump section (2) and a fixed scroll (4a) serving as a fixed-side spiral body when compressing a refrigerant are integrally formed. A scroll compressor, wherein a temperature detecting means (16) is provided in a discharge chamber section (8). 2. The scroll according to claim 1, wherein the lid member of the discharge chamber part and the temperature detecting container of the temperature detecting means are integrated. Compressor. 3. The scroll compressor according to claim 1, wherein said temperature detecting means (16) is provided so as to protrude into a space of said discharge chamber portion (8). 4. The scroll compressor according to claim 1, wherein the scroll compressor is electrically driven.