JP2002188571A - Temperature sensor holding device for compressor - 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 plate 12 is mounted for attaching the temperature sensor 7 to a shell 1A of the compressor 1. The sensor holding plate 12 is made of metal and composed of a holding plate fixing part 12a, a sensor fixing part 12b and a holding plate fixing piece 12c, a positioning means 13g for the sensor holding plate 12 is formed on an outer lower part 13f of the terminal protective cover 13, and the sensor holding plate 12 is inserted and fixed in a state that its holding plate fixing piece 12c is positioned along an outer peripheral face of the outer lower part 13f of the terminal protective cover 13 using the positioning means 13g as a guide.

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 conventional temperature sensor holding device will be described with reference to FIGS.

In FIGS. 11 and 12, reference numeral 51 denotes a compressor,
51A 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. A lead wire 55 is connected to the terminal 51b via a connection terminal 54, and a temperature sensor 56 connected to a sensor lead wire 56a is a metal sensor holding plate having a spring property and having a fixing hole. 5
7 is inserted into the sensor case 56b, covered with a terminal protection cover 58 made of resin, and fixed with a nut 59.

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 assembling worker temporarily fixes the temperature sensor to the terminal protection cover, the temperature sensor is easily detached from the terminal protection cover, and the inside of the terminal protection cover is difficult to see. The holding state and the lead wire laying state are not apparent from the appearance, and the mounting is 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 a first aspect of the present invention, there is provided a terminal electrically connected to a motor provided inside a compressor, and a terminal provided to cover the terminal and the like. A terminal protection cover and a temperature sensor for detecting the temperature of the compressor, the temperature sensor being held and fixed at a predetermined position on the outer surface of the container of the compressor where the temperature of the compressor is detected. A sensor holding plate is provided, and the sensor holding plate includes a holding plate fixing portion that closely adheres along the shape of the outer surface of the shell, a sensor fixing portion that fixes a temperature sensor to the holding plate fixing portion, and a holding plate fixing portion. At both ends, a holding plate fixing piece for temporarily fixing the sensor holding plate to the terminal protection cover is formed extending from the holding plate fixing portion, and further formed on the lower outside of the terminal protection cover. The positioning means of the sensor holding plate is formed, and the positioning means is used as a guide to move the sensor holding plate from below the terminal protection cover, so that the holding plate fixing piece extends along the outer peripheral surface of the lower outside of the terminal protection cover. The sensor holding plate is inserted and fixed in a position, and the sensor holding plate is pressed and held by the terminal protection cover.

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 the terminal protection cover and the lead wire getting stuck in the terminal protection cover are eliminated, and the holding plate fixed to both ends of the holding plate fixing part of the temperature sensor is eliminated. The mounting state of the sensor holding plate can be confirmed by directly visually checking the insertion and fixing state of the piece from the outside, so that the stable temperature sensor can be tightly fixed to the shell of the temperature sensing part and the assembly workability can be improved. it can.

According to a second aspect of the present invention, the temperature sensor is screw-fixed to a substantially central portion of the sensor holding plate.

With this configuration, stable heat transfer of the temperature sensor can be ensured when the cross section of the temperature sensor is rectangular.

According to a third aspect of the present invention, the sensor fixing portion of the sensor holding plate is formed according to the shape of the temperature sensor, and the inner size of the fixing portion is slightly smaller than the outer diameter of the cylindrical portion of the temperature sensor. The temperature sensor is formed so as to form a space between the temperature sensor and the sensor fixing portion with respect to the outer diameter shape of the holding portion of the temperature sensor in at least a part of the temperature sensor. It is configured to be fitted and fixed to the sensor holding plate.

According to this configuration, the contact fixing of the sensor holding plate can be further stabilized.

According to a fourth aspect of the present invention, the sensor holding plate comprises a holding plate fixing portion, a sensor fixing portion and a holding plate fixing piece, and the sensor holding plate is inserted into the terminal protecting cover and fixed to the terminal protecting cover. The guide piece serving as a guide extends from the holding plate fixing piece.

With this configuration, the sensor holding plate can be easily inserted into and fixed to the terminal protection cover, and the workability of assembling the terminal portion of the compressor can be improved.

According to a fifth aspect of the present invention, a positioning means for positioning the sensor holding plate to the terminal protection cover when the sensor holding plate is temporarily fixed is provided below the terminal protection cover. .

According to this configuration, the positioning of the sensor holding plate on the terminal protection cover is facilitated, and since the direction in which the sensor lead wires are routed is fixed, problems such as the sensor lead wires getting stuck in the terminal protection cover are eliminated. it can.

In the invention according to claim 6, positioning slits, holes or grooves are formed in the holding plate fixing pieces provided at both ends of the sensor holding plate, and the positioning slits, holes or grooves are provided on the lower outside of the terminal protection cover. It is fitted in the rib.

According to this structure, the positioning of the sensor holding plate on the terminal protection cover is facilitated, and the direction in which the sensor leads are routed is determined, so that the sensor leads are engaged with the terminal protection cover. It is possible to eliminate problems such as intrusion.

According to a seventh aspect of the present invention, a rib for positioning with respect to the sensor holding plate is provided at a lower portion of the outer side of the terminal protection cover.

According to this configuration, the positioning of the sensor holding plate on the terminal protection cover is facilitated similarly to the fifth aspect, and the direction in which the sensor leads are routed is determined, so that the sensor leads are engaged with the terminal protection cover. It is possible to eliminate problems such as intrusion.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 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 the 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 the operation at the time of refrigerant gas release or overload in the refrigeration cycle, and is attached and fixed to 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 FIGS.

1 and 2, a compressor 1 is a shell 1
A and a terminal unit 1B.
A terminal 8 and a fixing bolt 9 are fixedly provided at the top of the outer surface of A. 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.

Further, the temperature sensor 7 having a metal outer cylindrical shape to which the sensor lead wire 7a is connected is fixed to a sensor-holding plate 12 made of a metal plate having a spring property.
The terminal 8 is covered with a terminal protection cover 13 made of resin for protecting the terminal 8 from dust and water, and is tightly fixed to the outer surface top of the shell 1A with a nut 14.

FIG. 3 is a perspective view of the sensor holding plate 12.
FIG. 4 is a plan view of the terminal section 1B in a partial cross section taken along the arrow Z in FIG.

In FIG. 3, the sensor holding plate 12 includes a holding plate fixing portion 12a, a sensor fixing portion 12b, and a holding plate fixing piece 12c, and the holding plate fixing portion 12a which is in close contact with the outer surface of the shell 1A. A sensor fixing part 1 for fitting and fixing the temperature sensor 7 substantially in the center.
2b is formed by forming an opening 12d below, and furthermore, inclining inward by an angle E at both ends of the holding plate fixing portion 12a, and a guide piece 12e serving as a guide at the time of insertion is provided at the front end thereof. The holding plate fixing piece 12c of the holding plate fixing portion 1
2a and integrally extend substantially at a right angle.

Further, as shown in FIGS. 2 and 4, a positioning means for inserting the holding plate fixing piece 12c into the locking portion 13h whose lower side is inclined outward to the outer lower portion 13f of the terminal protection cover 13. Are provided opposite to each other.

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 FIG.
After fitting into the sensor fixing portion 12b through the opening 12d of the sensor holding plate 12 and fixing the same, as shown in FIG.
The sensor protection plate 12 is positioned by inserting the holding plate fixing piece 12c from below into the terminal protection cover 13 with the plurality of ribs 13g serving as guides, and the sensor holding plate 12 is attached to the terminal protection cover by the spring property of the holding plate fixing piece 12c. Temporarily fixed to -13.

Then, as shown in FIGS. 2 and 4, a terminal protection cover to which the sensor holding plate 12 is temporarily fixed is attached.
13 is put on the terminal 8 to which the lead wire 10 is connected, and is fixed at a predetermined position by the fixing bolt 9 and the nut 14, and the mounting operation of the temperature sensor 7 is completed.

In the case where the temperature sensor 7 is of a rectangular type in which screws are fixed, as shown in FIG.
A space 15 opening downward is formed in the center of the holding plate 12, and the temperature sensor 7 can be fixed to the space 15 with screws 16.

As shown in FIG. 7, the size D1 of the inside of the fixing portion of the sensor fixing portion 12b of the sensor holding plate 12 is slightly smaller than the radial dimension D2 of the temperature sensor 7, so that the temperature sensor 7 is fitted. When fixed, as shown in FIG. 7C, the sensor holding plate 12 is bent such that both ends of the holding plate fixing portion 12a are deformed upward by the dimension L1.

In this state, when the sensor holding plate 12 is temporarily fixed to the terminal protection cover 13 and the temperature sensor 7 is attached to the shell 1A, the sensor holding plate 12 is pressed against the shell 1A due to the bending of the dimension L1 and is brought into close contact therewith. The state is strengthened, and the close mounting of the temperature sensor 7 can be further stabilized.

As a positioning means for inserting the holding plate fixing piece 12c, the method of inserting the holding plate fixing piece 12c between a plurality of ribs 13g provided on the terminal protection cover 13 has been described. A slit 12f is provided at the center of the holding plate fixing piece 12c as shown in FIG.
9 may be used by positioning it by fitting it into the rib 13g as shown in FIG. 9, or another positioning method such as making the slit 12f a groove or a hole, and is not limited to the above method.

In this embodiment, the sensor holding plate 12
The terminal protection cover 13 is fixed by inserting and fixing a holding plate fixing piece 12c provided on the sensor holding plate 12 into a locking portion 13h provided on the terminal protection cover 13. 13
Although the description has been made with reference to the ribs 13g provided on the terminal protection cover 13, for example, as shown in FIG.
The sensor holding plate 12 and the terminal protection cover 13 can be fixed and positioned by providing a concave portion 13j on the sensor holding plate 12 and a locking projection 12g on the holding plate fixing piece 12c of the sensor holding plate 12. The fixing and positioning of the terminal protection cover 13 and the terminal protection cover 13 may be performed by another method, and are not limited to the above method.

The temperature sensor 7 is known as an overload protection device for the compressor 1 in which a function for detecting the compressor current and a function for detecting the compressor current are incorporated in the same sensor case. In this case, the temperature sensor holding device according to the present embodiment can of course be employed.

[0040]

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

First, in the present invention, a sensor holding plate for mounting a temperature sensor is provided on an outer surface of a shell of a compressor, and a holding plate fixing portion which is in close contact with the outer surface of the shell and a holding plate fixing portion. A sensor fixing part that fixes the temperature sensor in the center and a holding plate fixing piece that temporarily fixes the sensor holding plate to the terminal protection cover at both ends of the holding plate fixing part extend from the holding plate fixing part to form a terminal protection. A positioning means for the sensor holding plate is formed at a lower portion of the outer side of the cover, and the positioning plate is used as a guide to move the sensor holding plate from below the terminal protection cover so that the holding plate fixing piece extends along an outer peripheral surface of a lower outer portion of the terminal protection cover. And the sensor holding plate is pressed and held by the terminal protection cover. Since the position and direction for securely fixing the temperature sensor to the terminal protection cover are determined and temporarily fixed, the temperature sensor may fall off the terminal protection cover or the sensor lead wire may be damaged by the terminal protection cover. The fixing state of the holding plate fixing piece formed at both ends of the holding plate fixing portion of the temperature sensor is directly visually confirmed from the outside by visually checking the mounting state of the sensor holding plate. Since it can be confirmed, stable fixing of the temperature sensor-holding plate to the shell can be ensured, and assembly workability can be improved.

According to this embodiment, even if the temperature sensor has a cylindrical shape, the temperature of the shell is detected on a wide surface by the sensor fixing portion formed on the sensor holding plate and the holding plate fixing portion. Since the heat is transferred to the negative side, the accuracy of the compressor protection control can be improved.

Further, according to the present invention, since the temperature sensor is fixed to the substantially central portion of the sensor holding plate by screws, stable heat transfer of the temperature sensor can be ensured even when the cross section of the temperature sensor is rectangular. .

Further, according to the present invention, since the inside size of the fixing portion of the sensor fixing portion of the sensor holding plate is formed to be slightly smaller than the size of the temperature sensor, and the temperature sensor is fitted into and fixed to the sensor holding plate. Adhesion fixation can be more stabilized.

In the present invention, the sensor holding plate comprises a holding plate fixing portion, a sensor fixing portion, and a holding plate fixing piece, and the sensor holding plate serves as a guide when the sensor holding plate is inserted into and fixed to the terminal protection cover. Since the guide piece extends from the holding plate fixing piece, it is easy to insert and fix the sensor holding plate to the terminal protection cover, and the workability of assembling the terminal portion of the compressor can be improved.

The present invention also relates to a terminal protection cover.
The terminal protection cover on the sensor holding plate
Positioning means for temporarily fixing the sensor to the terminal protector facilitates positioning of the sensor holding plate on the terminal protection cover, and the direction in which the sensor leads are routed is fixed, so that the sensor leads are terminally protected. Problems such as biting into the cover can be eliminated.

According to the invention of the present application, positioning slits, holes or grooves are formed in holding plate fixing pieces provided at both ends of the sensor holding plate, and fitted to ribs provided on the lower outside of the terminal protection cover. Because of this, the positioning of the sensor holding plate on the terminal protection cover is facilitated, and the direction in which the sensor lead wires are routed is fixed, so that problems such as the sensor lead wires getting stuck in the terminal protection cover can be eliminated.

The present invention also provides a terminal protection cover.
Since the ribs are provided at the lower part of the outside of the sensor, the positioning of the sensor holding plate to the terminal protection cover is facilitated, and the direction in which the sensor leads are routed is determined, so that the sensor leads can bite into the terminal protection Problems can be resolved.

[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 perspective view of a sensor-holding plate according to the present embodiment.

4 is a plan view of a main part of a terminal part of a partial cross section taken along the arrow Z in FIG. 2;

FIG. 5 is a longitudinal sectional view taken along line II of FIG. 2;

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 vertical sectional view showing a main part of another temperature sensor fixing method according to the embodiment;

FIG. 8 is a perspective view of a sensor holding plate by another positioning means according to the embodiment.

FIG. 9 is a longitudinal sectional view showing a main part of another sensor-holding plate positioning means according to the embodiment;

FIG. 10 is a vertical sectional view of a main part showing fixing and positioning of another sensor-holding plate according to the embodiment.

FIG. 11 is a longitudinal sectional view of a conventional temperature sensor holding device.

FIG. 12 is a plan view of a terminal part of a partial cross section taken along arrow B in FIG. 11;

[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 8 Terminal 9 Fixing bolt 10a Lead 12 Sensor Holding plate 12a Holding plate fixing part 12b Sensor fixing part 12c Holding plate fixing piece 12d Opening 12e Guide piece 12f Slit 12g Locking convex part 13 Terminal protection cover 13g Rib (positioning means) 13f Outside lower part 13h Locking part 14 Nut

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Hideaki Nakagawa 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Yu Yu 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial F Terms (reference) 2F056 CA01 CA14 3H003 AA01 AB01 AC03 CD01 CE01 CF01

Claims (7)

[Claims] A terminal electrically connected to a motor disposed inside the compressor, a terminal protection cover disposed to cover the terminal and the like, and a temperature sensor for detecting a temperature of the compressor. In the compressor provided, a sensor holding plate for holding and fixing the temperature sensor is disposed at a predetermined position on the outer surface of the container of the compressor where the compressor temperature is detected, and the sensor holding plate is a shell. Temporarily fixing the sensor holding plate to the terminal protection cover at both ends of the holding plate fixing part, which fixes the temperature sensor to the holding plate fixing part and the holding plate fixing part which adheres closely to the shape of the outer surface. A holding plate fixing piece extending from the holding plate fixing portion is formed, and further, a positioning means for the sensor holding plate is formed at a lower portion outside the terminal protection cover. With the positioning means as a guide, the sensor holding plate is placed under the terminal protection cover from below.
The compression is characterized in that the holding plate fixing piece is inserted and fixed so as to be located along the outer peripheral surface of the outer lower portion of the terminal protection cover, and the sensor holding plate is pressed and held by the terminal protection cover. Machine temperature sensor holding device. 2. The temperature sensor holding device for a compressor according to claim 1, wherein the temperature sensor is screw-fixed to a substantially central portion of the sensor holding plate. 3. The sensor fixing portion of the sensor holding plate is formed according to the shape of the temperature sensor, and the inner size of the fixing portion is formed slightly smaller than the outer diameter of the cylindrical portion of the temperature sensor. At least a portion thereof is formed so as to form a space between the temperature sensor and the sensor fixing portion with respect to the outer diameter shape of the holding portion of the temperature sensor, and the temperature sensor can be fitted and fixed to the sensor holding plate. 2. The temperature sensor holding device for a compressor according to claim 1, wherein the temperature sensor holding device is configured as follows. 4. The sensor holding plate includes a holding plate fixing portion, a sensor fixing portion, and a holding plate fixing piece, and a guide piece serving as a guide when the sensor holding plate is inserted into and fixed to the terminal protection cover. And extending from the holding plate fixing piece.
The compressor temperature sensor holding device according to any one of the preceding claims. 5. A positioning means for positioning a sensor holding plate when inserting and fixing the sensor holding plate into the terminal protection cover is provided at a lower portion outside the terminal protection cover. The temperature sensor holding device for a compressor according to any one of claims 4 to 4. 6. Positioning slits, holes or grooves are formed in holding plate fixing pieces provided at both ends of the sensor holding plate, and fitted into ribs provided at the lower outside of the terminal protection cover. The temperature sensor holding device for a compressor according to any one of claims 1 to 5, wherein: 7. The temperature sensor holding device for a compressor according to claim 5, wherein a rib for positioning with respect to the sensor holding plate is provided at a lower portion of the outer side of the terminal protection cover.