JP2009257172A - Electrical equipment protecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical equipment protecting device for a compressor capable of preventing its power cords inside a cover for electrical equipment from being damaged, enhancing the working efficiency in wiring, and assuring high productivity and safety. <P>SOLUTION: The electrical equipment cover 150 is structured so that its side facing a bracket 120 includes an opening and a projection 155 internally extending toward the bracket 120, in which the chip of the projection 155 includes a recess 160. Even in case the power cords 180 and 182 are arranged between the electrical equipment 170 and the projection 155, the cords 180 and 182 can be prevented from damaging owing to their possibility of escaping into the recess 160, and thus an electrical equipment protecting device equipped with high safety can be provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrical component protection device for a compressor used in a freezer / refrigerator and the like.

  Conventionally, there is an electrical component protection device of this type that can be fixed by one-touch insertion work (see, for example, Patent Document 1).

  Hereinafter, the conventional electrical component protection apparatus will be described with reference to the drawings.

  FIG. 10 is an exploded perspective view of a conventional electrical component protection device described in Patent Document 1, and FIG. 11 is an enlarged cross-sectional view of the electrical component protection device attached.

  10 and 11, a glass terminal 15 for supplying electricity to the electric element is attached to the compressor body 10 that houses the electric element (not shown). A bracket 20 formed by bending a steel plate such as an inter-rolled steel plate is fixed to the outer surface of the compressor body 10 so as to surround the glass terminal 15.

  The electrical component 17 includes a start relay 17 a and an overload protection device 17 b, and the electrical component cover 50 is fixed to the bracket 20 so as to cover the electrical component 17.

  Power supply cords 80 and 82 are attached to the electrical component 17, and are connected to an external power supply (not shown).

  The electrical component cover 50 is injection-molded with a synthetic resin material such as polypropylene or polycarbonate, and has a tapered claw portion 70 that engages with the locking hole 45 at a position corresponding to the locking hole 45 provided in the bracket 20. Forming.

  The electrical component cover 50 includes a projection 55 on the inner surface opposite to the bracket 20 side toward the glass terminal 15 side, and a power cord 80 for energizing the electric elements of the compressor body 10 via the electrical components 17a and 17b. , 82 is formed on the bottom surface side of the electrical component cover 50 to draw out from between the electrical component cover 50 and the bracket 20 to the outside.

  The assembly operation of the electrical component protection apparatus configured as described above will be described below.

  An electrical component 17 is inserted and fixed to the glass terminal 15. When the electrical component cover 50 for covering the electrical component 17 is inserted into the bracket 20, the tapered claw portion 70 provided in the electrical component cover 50 is locked in the locking hole 45 of the bracket 20, and the electrical component cover 50 is fixed to the bracket 20 by one touch.

At this time, since the projection 55 extending toward the glass terminal 15 is provided on the inner surface of the electrical component cover 50 opposite to the bracket 20, the insertion amount for inserting the start relay 17 a of the electrical component 17 into the glass terminal 15 is insufficient. Even when the starting relay 17a is about to fall, the protrusion 55 becomes an obstacle, so that the starting relay 17a does not fall into the electrical component cover 50.
Japanese Patent Laid-Open No. 10-318142

  However, in the conventional configuration described above, when the power cords 80 and 82 are disposed between the start relay 17a and the protrusion 55 extending on the inner surface of the electrical component cover 50 on the side opposite to the bracket 20, the start relay 17a and the protrusion 55 When the space between them becomes smaller than the wire diameter of the power cords 80 and 82, the power cords 80 and 82 may be caught between the starting relay 17a and the projection 55, and the power cords 80 and 82 may be damaged. there were.

  In addition, since the back surface of the electrical component cover 50 has a substantially planar shape, there is a possibility that the electrical component cover 50 may be cracked when a strong impact force is applied in the terminal direction, so that the impact force does not escape.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a highly safe electrical component protection device that prevents the power cord from being damaged.

  Another object of the present invention is to solve the above-described conventional problems, and to provide a highly safe electrical component protection device by dispersing an impact force from outside the electrical component cover.

  In order to solve the above-described conventional problems, the electrical component protection device for a compressor according to the present invention includes an electrical component cover having a protrusion that extends from the back toward the bracket while the side facing the bracket is open. The tip of the projection has a recess recessed to the back side, and even when the power cord is placed between the electrical component and the projection, the power cord can escape to the recess to prevent the power cord from being damaged, A highly safe electrical component protection device can be provided.

  In addition, the electrical component protection device for a compressor according to the present invention includes a lead-out portion for pulling out the power cord of the electrical component at the bottom of the electrical component cover in the vicinity of the opening. The part includes a protruding part projecting toward the opposite side of the bracket, accommodates the overload protection device inside the protruding part, and includes an inclined surface from the vicinity of the tip of the protruding part toward the lead-out part. Since space can be secured on the non-terminal side, wiring using a tab terminal can be performed for the overload protection device, and the power cord is led to the lead-out portion along the inner surface of the electrical component cover. It is easy to route the cord and even when a strong impact force is applied from the outside to the terminal direction, the inclined surface can disperse the impact to the anti-projection side, so there is a possibility that the electrical component cover will break. Low because workability Te is good, it is possible to provide a highly secure electrical component protection device.

  The electrical component protection device for a compressor according to the present invention provides an electrical component protection device that can prevent the power cord from being caught and can improve workability when the power cord is installed, and has high workability and high safety. The purpose is to do.

  The invention according to claim 1 includes a bracket fixed so as to surround a glass terminal provided in the compressor body, and an electrical component cover that covers the electrical component and is fixed to the bracket, and the electrical component cover is attached to the bracket. It has an opening on the opposite side, a protrusion extending from the back toward the bracket, and a protrusion recessed at the back, and the power cord is placed between the electrical component and the protrusion. In this case, since the power cord can escape to the concave portion, the power cord can be prevented from being damaged, so that a highly safe electrical equipment protecting apparatus can be provided.

  According to a second aspect of the present invention, in the first aspect of the invention, the contour of the outer peripheral portion of the tip of the protrusion in the circumferential direction is a waveform curve, and the apex portion on the power cord side of the waveform curve is the power cord The trough on the anti-power cord side of the waveform curve is formed with a smaller curvature than the wire diameter of the power cord, and the power cord is placed between the electrical component and the protrusion. If the power cord is pressed against the apex of the tip of the projection, it can be released from the apex to the trough so that the power cord can be prevented from being pinched between the electrical component and the projection. In addition to the effect of the invention described in item 1, since the power cord is not damaged, a highly safe electrical component protection device can be provided.

  The invention according to claim 3 is the invention according to claim 2, wherein the waveform curve at the tip of the protrusion is provided with two apex portions and two trough portions, and the power cord is between the electrical component and the protrusion. In addition to the effect of the invention of claim 2, the power cord is not damaged in addition to the effect of the invention according to claim 2, since the power cord can escape on both sides with the projection apex as a boundary. A high electrical component protection device can be provided.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, since the protrusion has a hollow cylindrical shape, the diameter of the protrusion is increased in order to improve the protrusion strength. In addition to the effects of the invention according to any one of claims 1 to 3, it is possible to prevent the protrusions from being broken and to reduce the cost. A highly safe electrical component protection device can be provided.

  The invention described in claim 5 includes a bracket fixed so as to surround the glass terminal provided in the compressor body, and an electrical component cover that covers the electrical component and is fixed to the bracket, and the electrical component cover is attached to the bracket. There is an opening on the opposite side, and a lead-out part for pulling out the power cord of the electrical component at the bottom is provided in the vicinity of the opening, and the back of the electrical component cover on the side opposite to the bracket protrudes to the side opposite to the bracket Providing a protruding part, accommodating the overload protection device inside the protruding part, and providing an inclined surface from the vicinity of the tip of the protruding part toward the lead-out part, thereby securing a space on the side opposite to the overload protection device As a result, wiring using tab terminals can be performed on the overload protection device, and the power cord is led to the lead-out portion along the inner surface of the electrical component cover. Even when a strong impact force is applied in the direction of the terminal from the outside, it is possible to distribute the impact to the anti-projection side by the inclined surface, so there is no risk of breaking the electrical component cover, so workability is good and safety It is possible to provide a high electrical component protection device.

  The invention according to claim 6 is the invention according to claim 5, wherein the protruding portion is slightly inclined downward in the gravitational direction toward the opening side of the electrical component cover. Even if the inside of the protruding portion is condensed when the difference is remarkable, in addition to the effect of the invention according to claim 5, the water pool does not occur near the terminal of the overload protection device because it flows down to the bottom of the electrical component cover. Therefore, an electrical component protection device with high safety can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment, Furthermore, it is also possible to implement combining each embodiment.

(Embodiment 1)
1 is an exploded perspective view of an electrical component protection device according to Embodiment 1 of the present invention, FIG. 2 is an internal perspective view of an electrical component cover, FIG. 3 is an enlarged cross-sectional view of an electrical component protection device attached, and FIG. 5 is an enlarged view of the protrusion, and FIG. 5 is a circumferential development of the outer periphery of the protrusion tip.

  1 to 5, a glass terminal 115 for supplying electricity to an electric compression element (not shown) is attached to a compressor body 110 that houses a compression element (not shown). Is connected to an electrical component 170 for energizing the compression element.

  A bracket 120 formed by bending a steel plate such as a cold-rolled steel plate or a hot-rolled steel plate is fixed to the compressor body 110 so as to surround the glass terminal 115, and the bracket 120 is made of polypropylene so as to cover the electrical component 170. An electrical component cover 150 injection-molded with a synthetic resin material such as polycarbonate or the like is fixed.

  An overload protection device 172 is housed in the electrical component cover 150, and power cords 180 and 182 are attached to the electrical component 170 and the overload protection device 172, respectively, and connected to an external power source (not shown). The

  The electrical component cover 150 has an opening 130 on the side facing the bracket 120. The electrical component cover 150 includes a protrusion 155 that extends from the back surface 140 toward the bracket 120 and has a hollow cylindrical shape. A concave portion 160 that is recessed toward the back surface 140 is provided at the front end.

  The contour of the outer peripheral portion of the tip of the protrusion 155 developed in the circumferential direction is a waveform curve, and the apex portion 161 on the power cord 180, 182 side of the waveform curve is formed with a curvature larger than the wire diameter of the power cord 180, 182. Then, the troughs 162 on the side of the anti-power cords 180 and 182 of the waveform curve are formed with a curvature smaller than the wire diameter of the power cords 180 and 182.

  The waveform curve of the protrusion 155 includes two vertex portions 161a and 161b and two valley portions 162a and 162b.

  The assembly operation of the electrical component protection apparatus configured as described above will be described below.

  The electrical component 170 is inserted and fixed to the glass terminal 115. An electrical component cover 150 for covering the electrical component 170 is locked and fixed to the bracket 120.

  When the electrical component cover 150 is fixed to the bracket 120, the power cords 180 and 182 attached to the electrical component 170 and the overload protection device 172 are arranged as shown in FIG.

  When the electrical component cover 150 is inserted into the bracket 120, the power cords 180 and 182 are usually wired so as to avoid the protrusion 155, but the position of the power cord 182 is not fixed, and the power cords 180 and 182 are projected. When attached in a state of being arranged between 155 and the electrical component 170, the power cords 180, 182 when the space between the projection 155 and the electrical component 170 becomes narrower than the wire diameter of the power cords 180, 182. Is sandwiched between the protrusion 155 and the electrical component 170.

  However, in the first embodiment, a recess 160 that is recessed toward the back surface 140 is provided at the tip of the protrusion 155, and the contour of the outer periphery of the protrusion 155 developed in the circumferential direction is a waveform curve as shown in FIG. When the space between the projection 155 and the electrical component 170 is narrower than the wire diameter of the power cords 180 and 182 and the electrical component 170 and the apex portions 161a and 161b of the projection 155 are close to each other, Since the power cords 180 and 182 escape to the outside of the troughs 162a and 162b or the protrusions 155, pinching does not occur.

  Therefore, since the power cords 180 and 182 are not damaged, a highly safe electrical component protection device can be provided.

  In addition, since the protrusion 155 has a hollow cylindrical shape, it is possible to reduce the portion where the wall thickness is concentrated, to prevent the shrinkage at the time of resin molding and to reduce the material cost, and to further reduce the diameter of the protrusion 155. Since the size can be increased, the possibility that the protrusion 155 can be broken by being pushed by the power cords 180 and 182 can be reduced, so that it is possible to provide a cheaper and safer electrical component protection device.

(Embodiment 2)
6 is an exploded perspective view of the electrical component protection device according to Embodiment 2 of the present invention, FIG. 7 is an internal perspective view of the electrical component cover, FIG. 8 is a rear perspective view of the electrical component cover, and FIG. 9 is an electrical component protection device. It is an expanded sectional view of the attachment state.

  6 to 9, a glass terminal 215 that supplies electricity to an electric compression element (not shown) is attached to a compressor body 210 that houses a compression element (not shown). Is connected to an electrical component 270 for energizing the compression element.

  A bracket 220 formed by bending a steel plate such as a cold-rolled steel plate or a hot-rolled steel plate is fixed to the compressor body 210 so as to surround the glass terminal 215, and the bracket 220 is made of polypropylene so as to cover the electrical component 270. The electrical component cover 250 injection-molded with a synthetic resin material such as polycarbonate or polycarbonate is fixed.

  An overload protection device 272 is housed in the electrical component cover 250, and power cords 280 and 282 are attached to the electrical component 270 and the overload protection device 272, respectively, and connected to an external power source (not shown). The

  The electrical component cover 250 has an opening 230 on the side facing the bracket 220, and the bottom 252 is provided with a lead-out portion 254 in the vicinity of the opening 230 for drawing the power cords 280 and 282 to the outside.

  Further, the back surface 240 of the electrical component cover 250 on the opposite side of the bracket 220 is provided with a protruding portion 265 partially protruding toward the opposite side of the bracket 220, and is inclined from the vicinity of the tip of the protruding portion 265 toward the lead-out portion 254. 290.

  An overload protection device 272 is accommodated in the protruding portion 265.

  The inner surface of the protrusion 265 on the bracket 220 side is slightly inclined downward in the direction of gravity toward the opening 230 side of the electrical component cover 250.

  The assembly operation of the electrical component protection apparatus configured as described above will be described below.

  The electrical component 270 is inserted and fixed to the glass terminal 215. An electrical component cover 250 for covering the electrical component 270 is locked and fixed to the bracket 220.

  At this time, a part of the back surface 240 of the electrical component cover 250 is provided with the protruding portion 265 protruding to the opposite side of the bracket 220, so that there is sufficient space between the overload protection device 272 and the inner surface of the protruding portion 265 on the tip side. Therefore, when the power cord 282 is wired to the overload protection device 272, the tab terminal 295 can be adopted, so it is not necessary to weld the terminal portion of the overload protection device 272 and the power cord 282, and the man-hours And the workability is improved.

  In the state where the electrical component cover 250 is fixed to the bracket 220, the power cords 280 and 282 attached to the electrical component 270 and the overload protection device 272 are arranged as shown in FIG.

  When the electrical component cover 250 is inserted into the bracket 220, the position of the power cord 282 is not fixed, and an extra force is generated in the power cord 282 due to refraction or the like inside the protrusion 265, and the power cord 282 is damaged during wiring. However, since the inclined surface 290 from the vicinity of the tip of the protruding portion 265 on the back surface 240 of the electrical component cover 250 toward the lead-out portion 254 is provided, the inclined surface that is the inner surface of the electrical component cover 250 on the back surface 240 side. Since the power cord 282 is guided to the lead-out portion 254 along the surface 290, the power cord 282 can be wired from the lead-out portion 254 without difficulty, and the workability is improved without impairing the reliability of the power cord 282. .

  Further, since the rear surface 240 of the electrical component cover 250 is provided with the inclined surface 290, even when a strong impact is generated in the direction of the glass terminal 215 from the outside of the electrical component cover 250, the impact is caused by the inclination of the inclined surface 290. Since it is dispersed, the electrical component cover 250 can be prevented from breaking.

  In addition, even when condensation occurs in the protruding portion 265 when a difference between the outside temperature of the electric component cover 250 and the outside air temperature is remarkably generated, the electric component cover 250 may be affected by a slight inclination inside the protruding portion 265. Since the water flows from the bottom 252 toward the opening 230 and is discharged, no water pool is generated in the vicinity of the tab terminal 295 of the overload protection device 272. Therefore, an electrical component protection device with high safety can be provided.

  Although the tab terminal 295 has been described in the second embodiment, the present invention can be similarly applied to terminals having other shapes.

  As described above, the electrical component protection device for a compressor according to the present invention prevents the power cord from being damaged, and improves the workability when wiring the power cord. Since a product protection device can be provided, it can be applied to electrical equipment protection devices for all types of compressors such as refrigerators, air conditioners, and refrigerator-freezers.

1 is an exploded perspective view of an electrical component protection device according to Embodiment 1 of the present invention. Internal perspective view of the electrical component cover in the same embodiment The expanded sectional view of the attachment state of the electrical equipment protection device in the same embodiment Enlarged view of the protrusion in the same embodiment The circumferential direction expansion | deployment figure of the protrusion front-end | tip outer periphery in the same embodiment The exploded perspective view of the electrical equipment protection device in Embodiment 2 of this invention Internal perspective view of the electrical component cover in the same embodiment Rear perspective view of the electrical component cover in the same embodiment The expanded sectional view of the attachment state of the electrical equipment protection device in the same embodiment An exploded perspective view of a conventional electrical component protection device Enlarged sectional view of the mounting state of a conventional electrical component protection device

Explanation of symbols

110, 210 Compressor body 115, 215 Glass terminal 120, 220 Bracket 140, 240 Rear surface 150, 250 Electrical component cover 155 Protrusion 160 Recessed portion 161a, 161b Vertex portion 162a, 162b Valley portion 170, 270 Electrical component 180, 182, 280, 282 Power cord 230 Opening 252 Bottom 254 Deriving part 265 Protruding part 272 Overload protection device 290 Inclined surface

Claims (6)

  A bracket fixed so as to surround the glass terminal provided in the compressor body, an electrical component cover that covers the electrical component and is fixed to the bracket, and includes a protrusion extending from the back toward the bracket, The electrical component protection apparatus provided with a concave portion in which the tip of the projection is recessed toward the back side.   The contour of the outer periphery of the tip of the protrusion in the circumferential direction is a waveform curve, and the apex portion on the power cord side of the waveform curve is formed with a curvature larger than the wire diameter of the power cord. The electrical component protection device according to claim 1, wherein the trough portion is formed with a smaller curvature than the wire diameter of the power cord.   The electrical component protection device according to claim 2, wherein the waveform curve at the tip of the protrusion includes two vertex portions and two valley portions.   The electrical component protection device according to claim 1, wherein the protrusion has a hollow cylindrical shape.   A bracket fixed so as to surround the glass terminal provided in the compressor body, and an electrical component cover that covers the electrical component and is fixed to the bracket. The electrical component cover has an opening on the side facing the bracket. In addition, a lead-out portion for pulling out the power cord of the electrical component is provided near the opening at the bottom, and a back surface of the electrical component cover on the side opposite to the bracket includes a protruding portion that partially protrudes toward the bracket side. An electrical component protection device including an overload protection device housed in the projecting portion and an inclined surface directed from the vicinity of the tip of the projecting portion toward the lead-out portion.   6. The electrical component protection device according to claim 5, wherein the protruding portion is slightly inclined downward in the direction of gravity toward the opening side of the electrical component cover.

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