JPH09273481A - Fixing structure for exposed electrical equipment in compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate sure installation onto the upper face of a sealed container in a compressor with ease even if a thin long cylindrical temperature sensor is used. SOLUTION: A fixing structure is constructed of a base body 5, in which an electrical equipment part such as a temperature sensor 15 is arranged on an upper face 2a of a sealed container in a compressor, and a protection cover which covers the electrical equipment part when it is assembled to the base body 5. A notch 11 is formed on a pedestal 6 serving as a bottom part of the base body 5, so that the upper face 2a of the sealed container is exposed. Locking pieces 12, 13 are opposedly formed in the circumferential edge of the notch 11. In this way, a temperature sensor 15 is arranged inside the notch 11, and a fixing member 18 is engaged with the locking pieces 12, 13 in the notch 11 while covering the outer circumferential face of the temperature sensor 15, so that the temperature sensor 15 can be surely fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which, for example, electrical components exposed on the upper surface of a closed container of a hermetic compressor, particularly a temperature sensor, can be detachably and securely fixed to the closed container. Regarding

[0002]

2. Description of the Related Art In a conventional hermetic compressor, for example, as shown in Japanese Patent Laid-Open No. 62-9164, electrical components such as an overload protection device 10 are exposed to the upper shell of a compressor 3 and A structure in which electric components are covered with a cover 11 is known.

The overload protection device 10 is an automatic reset type device having a bimetal 9 for detecting a constant temperature or the like to shut off the circuit, and has a thick, short and generally cylindrical shape, and
A wire spring 16 installed between the protrusion 14 provided on the cover 14 and the protrusion 15 at the lower end of the overload protection device 10.
It is fixed by and. Although not specifically described in the specification of the above publication, according to FIGS. 1 and 2, a terminal pin is provided on the upper surface of the overload protection device 10, and the terminal pin is connected to the lead wire. I think it will be done.

On the other hand, in recent years, for example, Japanese Patent Laid-Open No. 6-241 has been proposed.
As shown in Japanese Patent No. 179, an elongated columnar compressed gas temperature detection device 13 is used in a compressor. The compressed gas temperature detection device 13 is inexpensive as compared with the overload protection device 10 described above, and since the lead wire is joined to the end portion in the axial direction in advance, the work of connecting the lead wire is unnecessary. have. This advantage does not change even when the compressed gas temperature detecting device 13 is not housed in the closed container 1 as shown in the above publication but is exposed and installed on the upper surface of the closed container 1.

[0005]

However, in the structure of the overload protection device disclosed in the former publication, for example, the lead wire is connected to the terminal pin after the overload protection device is held in the upper shell of the compressor. However, since a complicated assembling process such as attaching the cover and pulling out the lead wire outside the cover is usually performed thereafter, there is a disadvantage that the assembling work is complicated.

On the other hand, in the structure of the compressed gas temperature detecting device disclosed in the latter publication, the connecting work of the lead wire is not required as described above, and therefore the assembling work is performed more than the above-mentioned overload protection device. Although the complexity can be eased, on the other hand, it is difficult to fix it to the upper surface of the closed container of the compressor due to the elongated cylindrical shape, so it is necessary to confirm whether the compressed gas temperature detection device is securely fixed when mounting the case. It has a problem that it can not be done.

Further, in the structure of the compressed gas temperature detecting device disclosed in the latter publication, the lead wire extends in the axial direction of the compressed gas temperature detecting device. If the compressed gas temperature detection device is installed on the upper surface of the closed container of the compressor so that the side of the compressed gas temperature detection device faces the extraction portion for taking out the lead wire from the case, the lead wire must be largely diverted. For this reason, there is a fear that the lead wire is likely to be caught in the case or the like when the case is mounted.

Therefore, according to the present invention, even if an inexpensive elongated cylindrical temperature sensor is used, the temperature sensor can be easily and surely mounted on the upper surface of the hermetically sealed container of the compressor, and the lead wire extending from the temperature sensor can be used. An object of the present invention is to provide a structure for fixing exposed electric component parts of a compressor, which can be taken out to the outside without largely bypassing a lead wire.

[0009]

SUMMARY OF THE INVENTION In the fixing structure for the exposed electrical components of a compressor according to the present invention, however, a base body having side walls formed on the periphery is provided on the upper surface of a hermetically sealed container of the compressor, and the base body is provided in the base body. Arrangement of an electrical component connected to an electric element inside or outside a hermetic container of a compressor through a lead wire, and compression by attaching a protective cover to the hermetic container so as to cover the electrical component by being assembled to the base body. In the machine, the bottom of the substrate is cut out to expose the upper surface of the closed container,
By arranging the electrical component in the notch of the bottom portion, and engaging the fixing member with the locking piece formed on the peripheral edge of the notch while covering the side surface of the electrical component, a structure for fixing the electrical component is provided. (Claim 1). The locking piece is formed at a position facing each other in the peripheral edge of the cutout at the bottom of the base body, and bends upward with respect to the upper surface of the closed container, thereby forming a gap between the locked piece and the upper surface of the closed container. (Claim 2). Further, the fixing member includes a curved portion that holds the side portion of the electrical component, an engaging portion that has a flange that is engaged in a gap between the locking piece of the base body and the upper surface of the closed container, and the locking of the base body. At least an engaging portion having an insertion hole through which the piece is inserted is provided (Claim 3). Note that the electrical component referred to here mainly refers to a temperature sensor, which is also a long and thin cylindrical temperature sensor.

The fixing of the electrical components to the upper surface of the compressor hermetic container is performed by fixing one engaging portion of the fixing member to one locking piece formed on the peripheral edge of the cutout of the base and the compressor hermetic container. The fixing member is lowered from above to hold the side portion of the electrical component by the curved portion, while the other engaging portion of the fixing member is formed on the peripheral edge of the cutout of the base body. It is carried out by externally inserting it on the locking piece of.

As a result, the electric component can be easily fixed to the upper surface of the hermetic container of the compressor, and further, the curved portion of the fixing member holds the side portion of the electric component and the engaging portion cuts the base body. Since it is locked by the locking piece formed on the peripheral edge of the notch or is externally inserted in the locking piece, it is difficult to come off. Further, since the fixing work and the removing work of the electric component can be performed only with bare hands without tools, the maintenance of the electric component can be easily performed. Furthermore, since the electrical component is reliably fixed by the fixing member, it is not necessary to confirm whether the electrical component is fixed when the cover is attached.

Further, the electrical component comes into direct contact with the upper surface of the hermetically sealed container of the compressor exposed by forming a notch in the bottom surface of the base body, and the curved portion of the fixing member causes the compressor to be included in the outer peripheral surface of the electrical component. Since the entire surface on the side opposite to the upper surface side of is covered, it becomes difficult to convey the outside air temperature to the electrical components, and it becomes easy to accurately detect the surface temperature of the closed container.

If austenitic stainless steel for spring is used as the material of the fixing member, it is not necessary to perform heat treatment for imparting spring force to the fixing member or surface treatment for rust prevention.

On the other hand, it is desirable that the notch on the bottom of the base body is formed so that the end to which the lead wire of the electrical component is connected is directed to the side where the lead wire is taken out of the base body. 4). As a result, the distance between the lead wire joining portion of the electrical component and the lead-out portion becomes the shortest, so that the lead wire does not need to be largely detoured, and the lead wire may be sandwiched between the cover and the base body when the cover is attached. It disappears.

Further, the side wall formed on the peripheral edge of the substrate is
A stopper may be provided so as to prevent the electric component from coming off from the portion where the lead wire is taken out of the base (claim 5). As a result, it is possible to prevent the electrical component from coming off from the portion where the lead wire is taken out of the base without applying an excessive load to the lead wire.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7, the upper structure of the compressor 1 according to the present invention is shown. The compressor 1 is, for example, a hermetic compressor, and is provided with a compression element and an electric element for operating the compression element inside a closed container 2 having a closed cylindrical shape, for example.

On the upper surface 2a of the closed container 2, as shown in FIG. 1, a pedestal portion 3 having a shape in which circular raised portions 3a, 3b and 3c are connected is formed. A discharge pipe 4 communicating with the inside of the closed container 2 is attached to the raised portion 3c of the base portion 3. Further, the base body 5 is installed so as to straddle the raised portions 3a and 3b of the base portion 3.

As shown in FIGS. 1 and 5, the base body 5 is composed of a substantially gourd-shaped pedestal 6 formed by connecting two circles, and a side wall 7 erected along the peripheral edge of the pedestal 6. In addition to being basically configured, a take-out portion 8 for taking out lead wires 16 and 17, which will be described later, is formed by cutting out a part of the side wall 7 at one of the gourd-shaped concave portions. A stopper 9 is attached to the take-out portion 8.
Is installed. As shown in FIG. 4, the stopper 9 is formed by sandwiching portions 9a and 9a that sandwich the side wall 7 and a horizontal portion 9b that connects the sandwiching portions 9a and 9a and is higher than the pedestal 6.

One circular portion 6a of the base 6 of the base 5
A through hole 10 for inserting a terminal 14 described later is formed in the central portion of the, and a notch is formed in the central portion of the other circular portion 6b with a size that allows a temperature sensor 15 described later to be arranged with a margin. 11 is formed, and the notch 11 exposes the upper surface 2 a (the base 3) of the closed container 2. The shape of the notch 11 is not particularly limited, but when the temperature sensor 15 is arranged, the temperature sensor 15
It is desirable that the end portion to which the lead wire 17 is connected faces toward the extraction portion 8 side.

On both sides of the side edge extending in the longitudinal direction of the notch 11, a locking piece 12 and a locking piece 13 are formed so as to face each other. The locking pieces 12 and 13 are, for example,
The upper surface 2 of the closed container 2 having a thickness of about 2 mm or less.
the upper surface 2a so that a gap is formed between the upper surface 2a and the base 3a.
Bends upward against. Further, the width of the locking piece 13 in the longitudinal direction is somewhat smaller than the width of the locking piece 12 in the longitudinal direction. That is, while the width of the locking piece 12 in the longitudinal direction is, for example, about two thirds of the temperature sensor 15,
The width of the locking piece 13 in the longitudinal direction is, for example, about half the width of the temperature sensor 15.

As shown in FIGS. 1, 4 and 5, the terminals 14 for connecting the electric elements inside and outside the closed container 2 are fitted in the through holes 10 of the pedestal 6 and the closed container 2 is closed. A temperature sensor 15 connected to an external electric element is installed in the notch 11 of the pedestal 6 (that is, the upper surface 2a of the closed container 2, more specifically, the pedestal 3). Of these, the terminal 14 has, for example, three terminal pins 14a, and the lead wire 16 is joined to each terminal pin 14a. Further, the temperature sensor 15 is, for example, a long and slender columnar shape using a thermistor, and has the lead wire 1 at one end.
7 are coupled and fixed by a fixing member 18.

The fixing member 18 is made of, for example, austenitic stainless steel for springs so as to have a spring force, and covers the side portion of the temperature sensor, as particularly shown in FIGS. 2 to 4. The curved portion 19, the engaging portion 23 that is locked to the side surface of the closed container 2 of the locking piece 12, and the engaging portion 27 that is externally fitted to the locking piece 13.

Of these, the curved portion 19 has a cover piece 20 whose inner peripheral surface is curved with the same curvature as the side peripheral surface of the temperature sensor 15,
The holding piece 21, 21 extends from the side edge of the cover piece 20 in the longitudinal direction with the same curvature as the side peripheral surface of the temperature sensor 15. The longitudinal dimension of the cover piece 20 is substantially the same as the axial length of the temperature sensor 15, for example, 8/10 or more of the axial length of the temperature sensor 15.
The flange 2 is provided at the end of the holding piece 21 in the extending direction so that the fixing member 18 can be easily fitted to the side of the temperature sensor 15.
2 is formed.

The engaging portion 23 is a holding piece 21 of the cover piece 20.
A plate 24 extending from the side edge between the holding piece 21 and the holding piece 21 and having a substantially Λ shape formed by bending in a mountain fold, and a flange 2 formed at the end of the plate 24 in the extending direction.
5 is provided. And at the top of the plate 24,
Notches 26 are formed to increase the elasticity of the plate 24. The longitudinal dimension of the notch 26 is preferably, for example, one third to four ninth of the axial length of the temperature sensor 15. Then, between the holding piece 21 of the bending portion 19 and the plate 24 of the engaging portion 23, the weight for pressing the temperature sensor 15 against the upper surface 2a of the closed container 2 is increased and the fixing member 18 is provided.
A slit 27 is formed in order to reduce the load when the temperature sensor 15 is fitted onto the temperature sensor 15.

The engaging portion 28 extends from the side edge of the cover piece 20 opposite to the curved portion 19 and the engaging portion 23, and has a substantially V-shaped plate 29 bent in a valley fold. The plate 29 has a substantially rectangular insertion hole 30 formed on a side extending upward with respect to the upper surface 2a of the closed container 2. The insertion hole 30 has a size into which the locking piece 13 of the pedestal 6 can be inserted, that is, the major axis thereof is half the temperature sensor 15.
And has a minor axis of about 2 mm.

Then, as shown in FIG. 5, on the side wall 7 on the longest diameter side of the base body 5, the locking claw 38 or the fitting portion 39 of the fitting portion 35 of the protective cover 32, which will be described later, faces each other so as to face each other.
Fitting holes 31, 31 to be fitted with the locking claws 43 are provided.

The protective cover 32 is made of, for example, a synthetic resin or the like, and as shown in FIGS.
The cylindrical portion 32a has a shape corresponding to the shape of the pedestal 6, that is, a cylindrical portion 32a having a substantially gourd-shaped cross section, and a flat portion 32b closing one end side thereof.

As shown in FIG. 5, the protective cover 32 has one gourd-shaped recessed portion (the take-out portion 8 of the base 5).
(Of course, it is the same side as the side on which is formed), and a bulge 33 is provided. The bulging portion 33 is formed with an opening 34 for taking out the lead wires 16 and 17 described above.

As shown particularly in FIG. 5, the cylindrical portion 32a on the longest diameter side of the protective cover 32 is provided with a fitting portion 35 and a fitting portion 39 so as to face each other.

Of these, the fitting portion 35 has a cutout piece 37 whose both ends are separated from the protective cover 32 by slits 36, 36, and the cutout piece 37 is provided on the open end side thereof. It has a locking claw 38 formed toward the inside of the protective cover 32 so that it can be fitted into the fitting hole 31 of the base body 5.

On the other hand, the fitting portion 39 is separated from the protective cover 32 by the slits 40, 40 on both end sides, and
It has a lever 41 whose one side extends to the flat surface 32b side. The lever 41 is swingably connected to the protective cover 32 by a connecting portion 42. Further, the lever 41 has an engaging claw 43 formed toward the inside of the protective cover 32 so that the lever 41 can be fitted into the fitting hole 31 of the base body 5 on the opening end side of the protective cover 32.

Then, the temperature sensor 15 is provided with the cutout 11
Since it can be directly installed on the exposed upper surface 2a (base 3) of the closed container 2, the surface temperature of the closed container 2 can be easily sensed, and the upper surface 2a of the compressor 2 among the outer peripheral surfaces of the temperature sensor 15 can be easily detected. Since the fixing member 18 covers all of the opposite side, it is difficult to transmit the outside air temperature to the temperature sensor 15.
5 can detect the temperature accurately.

Further, when the temperature sensor 15 is arranged in the notch 11 of the pedestal 6, the lead wire 1 of the temperature sensor 15
By forming the end portion to which the 7 is connected to face the extraction portion 8 side, it is not necessary to largely bypass the lead wire 17 of the temperature sensor 15 and take it out from the extraction portion 8.

Further, by attaching a stopper 9 which is one step higher than the pedestal 6 to the take-out portion 8 of the base body 5, the lead wire 17
It is possible to prevent the temperature sensor 15 from moving away from the mounting position by moving the temperature sensor 15 in the axial direction without imposing an excessive load on the temperature sensor 15.

Furthermore, since austenitic stainless steel for springs is used as the material of the fixing member 18, there is no need to perform heat treatment for imparting spring force to the fixing member or surface treatment for rust prevention. , Fixing member 1
8 can be reduced in manufacturing cost.

Next, based on the above configuration, the temperature sensor 1
5 is attached to the base 5 using the fixing member 18,
This will be described with reference to FIG.

First, the temperature sensor 15 is placed in the notch 11 of the pedestal 6 so that the connected end portion of the lead wire 17 faces the extraction portion 8 side, and then as shown in FIG. 3 (a). The flange 25 formed on the plate 24 of the fixing member 18 is inserted into the gap between the locking piece 12 of the base 5 and the upper surface 2a of the closed container 2. Next, as shown in FIG.
A force is applied in the arrow direction of (b). As a result, the width of the plate 24 of the fixing member 18 is narrowed to generate a spring force, and the valley-folded portion of the plate 29 of the fixing member 18 is above the gap between the side portion of the temperature sensor 15 and the locking piece 13 of the base 5. Located in. Further, the plate 29 of the fixing member 18 is attached to the plate shown in FIG.
In the arrow direction of (c), the curved portion 19 of the fixing member 18 is lowered so as to cover the side peripheral surface of the temperature sensor 15,
The plate 29 is grounded to the upper surface 2a of the closed container 2. Then, when the fixing member 18 is released, the pressure on the plate 24 is released and the spring force is released.
As shown in (d), the width of the plate 24 is restored, and the fixing member 18 moves in the arrow direction, so that the locking piece 13 is externally inserted in the insertion hole 30 of the plate 29. As a result, the temperature sensor 15 is firmly fixed on the upper surface 2a of the closed container 2.

The fixing member 18 can be removed by reversing the above steps. That is, the plate 29 is pushed in the direction opposite to the direction of the arrow in FIG.
After removing, the fixing member 18 is lifted in the direction opposite to the arrow direction of FIG. 3C, and the flange 25 of the plate 24 is removed from the locking piece 12.

Further, the protective cover 32 is attached to the temperature sensor 1 described above.
A process of attaching the substrate 5 to the fixed substrate 5 will be described.

First, the lead wires 16 and 17 are taken out from the take-out portion 8 of the base body 5, and then the protective cover 32 is assembled to the base body 5 as shown in FIG. Then, as shown in FIG. 6, the assembly is carried out by previously pressing the end portion of the lever 41 with a finger to lift the locking claw 43, fitting the protective cover 32 onto the base body 5, and removing the cutout piece 37.
The engaging claws 38 are fitted into the fitting holes 31 of the base body 5, and the fingers are released so that the engaging claws 43 of the lever 41 are fitted into the fitting holes 31 of the base body 5.

According to the above steps, however, the temperature sensor 15 can be positioned by placing it in the notch 11 of the pedestal 6. Further, since the temperature sensor 15 can be assembled by the fixing member 18 only with bare hands and no tool is required, the temperature sensor 15 can be easily attached and detached. Further, when the protective cover 32 is attached to the base body 5, it is not necessary to confirm whether the temperature sensor 5 is securely fixed by the fixing member 18.

[0043]

As described above, according to the fixing structure of the exposed electric component of the compressor according to any one of claims 1 to 3, after the electric component is arranged on the upper surface of the closed container exposed by the notch, the base body is formed. While holding the side portion of the electrical component by the curved portion of the fixing member, the engaging portion is engaged with the engaging piece formed on the notch peripheral edge of Since the electrical components can be mounted, the mounting work can be performed easily and surely.

Further, according to the fixing structure of the exposed electrical component of the compressor according to the first to third aspects, it is possible to perform the mounting work and the removal work of the electrical component with bare hands, and a tool is required. Therefore, maintenance of electrical components can be easily performed.

Further, according to the fixing structure of the exposed electric component of the compressor according to the first to third aspects, since the electric component is securely fixed by the fixing member, the electric component is fixed when the cover is attached. The work of checking whether or not the cover is attached is unnecessary, and the work of attaching the cover can be simplified.

Particularly, according to the fixing structure of the exposed electric component of the compressor according to the first aspect, the electric component is directly contacted with the exposed upper surface of the closed container of the compressor by forming the notch on the bottom surface of the base. I am letting you. Further, since the curved portion of the fixing member covers all of the outer peripheral surface of the electric component on the side opposite to the upper surface side of the compressor, it is difficult to transmit the outside air temperature to the electric component. As a result, it becomes possible for the electrical component to more accurately detect the surface temperature of the closed container.

On the other hand, according to the structure for fixing the exposed electrical component of the compressor according to the fourth aspect, the distance between the lead wire joining portion of the electrical component and the lead-out portion is the shortest, so that the lead wire is large. There is no need to detour, and there is no risk of the lead wire being caught between the cover and the base body when the cover is attached, so there is no need to perform work to confirm whether or not the lead wire may be caught when the cover is attached, The work of attaching the cover can be simplified.

Further, according to the fixing structure of the exposed electric component of the compressor of the fifth aspect, the stopper is provided on the side wall of the base so that the electric component is detached from the portion where the lead wire is taken out to the outside of the base. Can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a temperature sensor is attached by a fixing member in a base on the upper surface of a hermetically sealed container of a compressor.

FIG. 2 is a perspective view showing a temperature sensor, a notch to which the temperature sensor is attached, and a fixture for attaching the temperature sensor.

FIG. 3 is an end view showing a step of installing a temperature sensor on a top surface of a closed container of a compressor by a fixing member.

FIG. 4 is an enlarged view of an essential part showing a state in which the temperature sensor is attached by a fixing member.

FIG. 5 is a perspective view showing a step of assembling the protective cover to the base body.

FIG. 6 is an end view showing an assembling mechanism provided on a protective cover.

FIG. 7 is an end view showing a step of assembling the protective cover to the base body using the assembling mechanism of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Airtight container 2a Top 3 Unit 5 Base 6 Base (Bottom) 7 Side wall 8 Extraction 9 Stopper 11 Notch 12 Locking piece 13 Locking piece 14 Terminal 15 Temperature sensor 16 Lead wire 17 Lead wire 18 Fixing member 19 curved part 23 engaging part 24 plate 25 flange 28 engaging part 29 plate 30 insertion hole 32 protective cover

Claims (5)

[Claims] 1. An electric component which is provided with a base body having side walls formed on its peripheral edge on an upper surface of a hermetic container of a compressor, and is connected to an electric element inside or outside the hermetic container of the compressor via a lead wire in the base. In a compressor in which a protective cover is attached to the airtight container so as to cover the electric components by assembling the airtight component, the bottom of the base is cut out to expose the upper surface of the airtight container, and The electric component is arranged in the notch, and the fixing member is engaged with a locking piece formed on the periphery of the notch while covering the side surface of the electric component to fix the electric component. Fixing structure for the exposed electrical components of the compressor. 2. The locking piece is formed at a position facing each other in the peripheral edge of the cutout at the bottom of the base body, and bends upward with respect to the upper surface of the closed container to form a gap between the locked piece and the upper surface of the closed container. The fixing structure for the exposed electrical component of the compressor according to claim 1, further comprising: 3. The fixing member includes a curved portion that holds a side portion of an electrical component, an engaging portion that has a flange that is engaged with a gap between an engaging piece of the base body and an upper surface of the closed container, and the base body. The fixing structure for an exposed electrical component of a compressor according to claim 1, further comprising: an engaging portion formed with an insertion hole through which the locking piece is inserted. 4. The notch on the bottom of the base body is formed so that the end to which the lead wire of the electrical component is connected faces the side where the lead wire is taken out of the base body. 1. A structure for fixing exposed electric components of a compressor according to 1. 5. The side wall formed on the peripheral edge of the base body is provided with a stopper so that the electrical component does not come off from a portion where the lead wire is taken out of the base body. Fixed structure of exposed electrical components of compressor.