JP2002188570A - Compressor temperature sensor holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature sensor holding device of a compressor capable of realizing a firm temporarily-fixed state and a stable holding state of a temperature sensor to a terminal protective cover, improving the accuracy in protecting and controlling a compressor, a simplifying the fixing work, and improving the assembling workability. SOLUTION: A sensor holding part 15 for closely fixing the temperature sensor 7 on an outer surface of the compressor 1 is formed in a state of being extended from a terminal protective cover 13, the sensor holding part 15 has a space part 15c having an opening 15a of a dimension approximately same as an outside dimension of the temperature sensor 7, and an opened space 15d formed on one end of the space part 15c for leading out a sensor lead wire 7a, the temperature sensor 7 is fitted in the space part 15c to be temporarily fixed, and the terminal protective cover 13 is placed on the terminal 8 to hold the temperature sensor 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly, to a temperature sensor holding device for detecting a shell temperature of a compressor.

[0002]

2. Description of the Related Art A compressor constituting a refrigeration cycle of an air conditioner, a refrigerator or the like includes a temperature sensor for preventing and protecting a temperature rise of the compressor due to an overload operation or a refrigerant leakage operation of the refrigeration cycle. It is attached to the outer surface by a temperature sensor holding device. The general prior art temperature sensor holding device will be described with reference to FIGS.

In FIGS. 7 and 8, reference numeral 51 denotes a compressor;
A is a shell. A terminal 51b and a protective cover fixing bolt 51c are fixed to the top of the outer surface of the shell 51A. The connection terminal 54 is connected to the terminal 51b.
The temperature sensor 56 to which the lead wire 55 is connected via a sensor lead wire 56a is further inserted into the sensor case 56b by inserting a metal sensor holding plate 57 having a spring property and having a fixing hole into the sensor case 56b. And is fixed by a nut 59 with a terminal protection cover 58 made of the same.

With this configuration, the temperature sensor 56 is
The sensor holding plate 5 is fixed by the collar 58a of the terminal protection cover 58.
7 and is temporarily fixed, and then attached to the shell 51A in a state where the temperature sensing portion 56c of the temperature sensor 56 is in close contact with the shell 51A.

[0005]

However, the temperature sensor holding device having the above configuration has the following problems. That is, when the assembler temporarily fixes the temperature sensor to the terminal protection cover, since the backlash between the temperature sensor and the terminal protection cover is large, the temperature sensor is not used for the terminal protection cover. And the workability of mounting the temperature sensor was deteriorated. Further, the holding state of the temperature sensor is apt to be unstable, and the wiring state of the lead wire is also apt to be unstable, which deteriorates the precision of the compressor protection control.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention realizes a reliable temporary fixing of a temperature sensor to a terminal protection cover and a stable holding state, thereby improving the accuracy of compressor protection control and facilitating the fixing work. It is an object of the present invention to provide a temperature sensor holding device for a compressor that improves assembly workability.

[0007]

According to the first aspect of the present invention, there is provided a compressor including a terminal, a terminal protection cover for protecting the terminal from dust and water, and a temperature sensor for detecting a compressor temperature. A sensor holding part for fixing the temperature sensor to the outer surface of the compressor shell is extended from the terminal protection cover. The sensor holding part has the same size as the external dimensions of the temperature sensor and is open at the bottom. And a space for opening the sensor lead wire at one end of the space, and temporarily fix the temperature sensor in the space and cover the terminal with the terminal protection cover. Is held.

According to this configuration, the position and the direction in which the temperature sensor is temporarily fixed to the terminal protection cover are reliably determined and temporarily fixed during the assembling work of the terminal portion.
Problems such as the temperature sensor coming off from the terminal protection cover and the lead wire getting stuck in the terminal protection cover are eliminated, and the temperature sensor is protected by the terminal protection cover.
Since the temperature sensor is securely fixed to the shell, the precision of compressor protection control can be improved, the fixing operation can be facilitated, and the assembly workability can be improved.

According to a second aspect of the present invention, a tongue piece as sensor lead wire holding means extends from a terminal protection cover in an opening space of the sensor holding portion.

[0010] With this configuration, it is possible to more reliably eliminate problems such as the temperature sensor coming off from the terminal protection cover and the sensor lead wire getting stuck in the terminal protection cover.

According to a third aspect of the present invention, a plurality of sensor holding ribs are provided extending from a terminal protection cover on the inner periphery of the space of the sensor holding portion, and a temperature sensor is fitted between the sensor holding ribs. It is fixed.

With this configuration, the contact between the temperature sensor and the terminal protection cover is close to the point contact, so that the shell temperature of the compressor is prevented from escaping to the terminal protection cover by heat conduction, and the protection of the compressor is prevented. Control accuracy can be improved.

[0013]

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

FIG. 1 is a refrigeration cycle diagram of an air conditioner according to an embodiment of the present invention. 1 is a compressor, 2 is an outdoor heat exchanger, 3 is an outdoor fan, 4 is a decompressor, 5 is an indoor heat exchanger, 6 is an indoor fan, and 7 is a thermistor for detecting the compressor temperature. It is a temperature sensor as a compressor temperature detecting means connected to a control device (not shown) of the air conditioner.

During the cooling operation, the refrigerant discharged from the compressor 1 flows through the outdoor heat exchanger 2, the decompressor 4, and the indoor heat exchanger 5, and passes through a well-known refrigeration cycle which is sucked into the compressor 1 again. Make up.

The temperature sensor 7 is provided to protect the compressor 1 from running when the refrigerant gas escapes or overloads in the refrigeration cycle, and is mounted and fixed at a predetermined position of the compressor 1 by a temperature sensor holding device. Have been.

Next, the temperature sensor holding device according to the present embodiment will be explained with reference to FIG.

In FIG. 2, the compressor 1 comprises a shell 1A and a terminal 1B, and a terminal 8 and fixing bolts 9 are fixedly provided on the top of the outer surface of the shell 1A. Reference numeral 10 denotes a lead wire for driving a motor (not shown) of the compressor 1, and is connected to the terminal 8 via a connection terminal 11.

Reference numeral 13 denotes a terminal protection cover, which is made of a resin molded product, is placed over the terminal 8 to protect the terminal 8 from dust, water, and the like, and is fixed to the top of the outer surface of the shell 1A with a nut 14. .

Further, the terminal protection cover 13 includes:
The sensor holding portion 15 is integrally extended from the terminal protection cover 13 to tightly fix the cylindrical temperature sensor 7 having a metal outer cylindrical shape to which the sensor lead wire 7a is connected to the outer surface of the shell 1A. Has formed.

FIG. 3 is a plan view of the terminal portion 1B of a partial cross section taken along the arrow A in FIG.

FIGS. 2 and 3
As shown in FIG. 5, a space portion 15c having the same size as the external dimensions of the temperature sensor 7 as an opening portion 15a and a projection 15b provided inward, and a space portion for fitting and fixing the temperature sensor 7, An opening space 15d for drawing out the sensor lead wire 7a to the outside is formed at one end of 15c.

Next, the operation of mounting the temperature sensor 7 by the temperature sensor holding device having the above-described configuration will be described.

First, as shown in FIGS. 2 and 3, the temperature sensor 7 is fitted into the space 15c from the opening 15a of the sensor holder 15, and the sensor lead wire 7a is drawn out to the outside along the opening space 15d. Temporarily fix the temperature sensor 7 to the terminal protection cover. At this time, the temperature sensor 7 is partially tightly adhered to the space 15c by the protrusion 15b and is fitted into the space 15c.

Then, the terminal protection cover 13 to which the temperature sensor 7 is temporarily fixed is put on the terminal 8 to which the lead wire 10 is connected, and is fixed at a predetermined position by fixing bolts 9 and nuts 14 so as to adjust the temperature. The mounting work of the sensor 7 is completed.

As shown in FIGS. 4 and 5, a tongue piece 16 is integrally provided from the terminal protection cover 13 as a sensor lead wire holding means in the opening space 15d of the sensor holding portion 15 and further provided as a sensor lead wire holding means. A slit 16a having a downward opening is provided at the center of the piece 16, and the sensor lead wire 7a is sandwiched and held in the slit 16a, so that the temperature sensor comes off the terminal protection cover, Problems such as the sensor lead wire getting stuck in the terminal protection cover can be more reliably eliminated.
The sensor lead wire holding means may have the slit 16a formed at one end of the tongue piece 16 instead of the central portion thereof, or may have another shape, and is not limited to the above method.

As shown in FIG. 6, a terminal protection cover 1 is provided on the inner peripheral portion of the space 15c of the sensor holding portion 15.
A plurality of sensor retaining ribs 17 are integrally provided extending from the third, and are fitted and fixed in the space 15c in a state where the outer periphery of the temperature sensor 7 is supported between the sensor retaining ribs 17, and the temperature sensor 7 and the terminal protection cover are fixed. By making the contact surface 13 close to point contact, it is possible to prevent the shell temperature of the compressor from escaping to the terminal protection cover by heat conduction, thereby improving the precision of compressor protection control.

Although the temperature sensor 7 according to the present embodiment has been described as having a cylindrical shape, the temperature sensor holding device according to the above-described embodiment can of course be employed even if the temperature sensor 7 has another shape, for example, a square shape. It is.

[0029]

The present invention is embodied in the form described above, and has the following effects.

According to the first aspect of the present invention, a sensor holding portion for tightly fixing the temperature sensor to the outer surface of the compressor shell is formed on the terminal protection cover so as to extend from the terminal protection cover. The sensor holder has a space with the same size as the external dimensions of the temperature sensor, with an opening at the bottom, and an open space at one end of the space for drawing out sensor leads, and the temperature sensor is fitted into the space. Since the temperature sensor was temporarily fixed and the terminal protection cover was put on the terminal to hold the temperature sensor, the position and direction of temporarily fixing the temperature sensor to the terminal protection cover during the assembling work of the terminal portion were securely determined. Is temporarily fixed.
Problems such as the temperature sensor coming off from the terminal protection cover and the lead wire getting stuck in the terminal protection cover are eliminated, and the temperature sensor is protected by the terminal protection cover.
Since the temperature sensor is securely fixed to the shell, the precision of compressor protection control can be improved, the fixing operation can be facilitated, and the assembly workability can be improved.

According to the second aspect of the present invention, a tongue piece as a sensor lead wire holding means is provided extending from the terminal protection cover in the opening space of the sensor holding portion. Problems such as the sensor falling off or the sensor lead wire getting stuck in the terminal protection cover can be more reliably eliminated.

According to the third aspect of the present invention, the tongue piece as the sensor lead wire holding means is provided extending from the terminal protection cover in the opening space of the sensor holding portion, so that the temperature sensor and the terminal protection are provided. Since the contact with the cover is close to the point contact, it is possible to prevent the shell temperature of the compressor from escaping to the terminal protection cover by heat conduction, thereby improving the precision of the compressor protection control.

[Brief description of the drawings]

FIG. 1 is a refrigeration cycle diagram of an air conditioner.

FIG. 2 is a longitudinal sectional view of the temperature sensor-holding device according to the present embodiment.

FIG. 3 is a plan view of a main part of a terminal part of a partial cross section taken along a line A in FIG.

FIG. 4 is a vertical sectional view of a main part showing another temperature sensor fixing method according to the embodiment.

FIG. 5 is a longitudinal sectional view taken along the line II of FIG. 4;

FIG. 6 is a vertical sectional view of a main part showing another temperature sensor fixing method according to the embodiment.

FIG. 7 is a longitudinal sectional view of a conventional temperature sensor holding device.

8 is a plan view of a terminal part of a partial cross section taken along the arrow B in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 1A shell 1B Terminal part 2 Outdoor heat exchanger 3 Outdoor fan 4 Pressure reducer 5 Indoor heat exchanger 6 Indoor fan 7 Temperature sensor 7a Sensor lead wire 8 Terminal 9 Fixing bolt 10 Lead wire 13 Terminal Protective cover 14 Nut 15 Sensor holding part 15a Opening 15b Projection 15c Space 15d Opening space 16 Tongue piece 16a Slit 17 Sensor holding rib

Claims (3)

[Claims] 1. A compressor provided with a terminal, a terminal protection cover for protecting the terminal from dust and water, and a temperature sensor for detecting a compressor temperature, wherein the temperature sensor is tightly fixed to an outer surface of a shell of the compressor. A sensor holding portion extending from the terminal protection cover, the sensor holding portion having a size substantially the same as the external dimensions of the temperature sensor and having a downward opening portion; An opening space for drawing out a sensor lead wire is formed at one end of the terminal, the temperature sensor is fitted into the space portion and temporarily fixed, and the terminal protection cover is put on the terminal to hold the temperature sensor. The temperature sensor holding device of the compressor to be used as. 2. A temperature sensor holding device for a compressor according to claim 1, wherein a tongue piece as sensor lead wire holding means extends from a terminal protection cover in an opening space of the sensor holding portion. 3. A targ is provided on the inner periphery of the space of the sensor holding unit.
2. The temperature sensor holding device for a compressor according to claim 1, wherein a plurality of sensor holding ribs extend from the terminal protection cover, and the temperature sensor is fitted and fixed between the sensor holding ribs.