JP2008075547A - Overload relay retention device for electric compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an overload relay retention device for an electric compressor stably retaining an overload relay with inhibiting rise of cost as much as possible. <P>SOLUTION: In the electric compressor 10 provided with a terminal fence 30 fixed on an outer surface of a hermetic vessel 12 to enclose a terminal provided on an end cap 12B of the hermetic vessel 12, and a terminal cover 1 installed on the terminal fence 30 to cover the terminal 20, the overload relay 15 and a retention part 7 provided on an inner surface of the terminal cover 1 and retaining the overload relay 15 are provided, and the overload relay 15 abuts on the terminal fence 30 under a condition where the terminal cover 1 is installed on the terminal fence 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an overload relay holding device that holds an overload relay of an electric compressor.

  2. Description of the Related Art Conventionally, an electric compressor is composed of a sealed container, an electric element stored in the sealed container, a compression element, and the like. A terminal is provided on the outer surface of the sealed container, and a plurality of conductive pins are supported on the terminal via an insulating member. Then, a start relay that controls the start and stop of the electric element, an overload relay that protects the electric element from an excessive load, and the like are attached, and each relay and terminal are protected by covering the outer surface with a terminal cover. It was a thing.

By the way, when an overload relay is attached to a terminal, it is necessary to fix the overload relay so that the overload relay is not displaced. Conventionally, it is fixed to the starting relay with a clip, or the overload relay itself can be fixed by inserting a conductive pin of a terminal (see, for example, Patent Document 1 and Patent Document 2).
Japanese Patent Laid-Open No. 9-285066 JP 2004-293539 A

  However, as described in Patent Document 1, when the overload relay is fixed to the start relay with a clip, the clip increases the number of parts and causes the inconvenience of complicated installation work. Further, as described in the cited document 2, when the conductive pin of the terminal is used, the overload relay itself must have a special shape into which the conductive pin can be inserted, resulting in an increase in manufacturing cost.

  The present invention has been made to solve the conventional technical problem, and provides an overload relay holding device for an electric compressor that stably holds an overload relay while suppressing an increase in cost as much as possible. The purpose is to do.

  An overload relay holding device for an electric compressor according to the present invention includes a terminal fence fixed to an outer surface of a sealed container so as to surround a terminal provided in the sealed container, and a terminal attached to the terminal fence so as to cover the terminal In an electric compressor having a cover, the overload relay includes an overload relay and a holding portion that is formed on an inner surface of the terminal cover and holds the overload relay, and the terminal cover is attached to the terminal fence. Is in contact with the terminal fence.

  According to a second aspect of the present invention, there is provided an overload relay holding device for an electric compressor, wherein the holding portion has an inner surface shape substantially matching the outer surface shape of the overload relay, and a wiring terminal connected to the overload relay is provided. A notch that can be entered is formed.

  According to a third aspect of the present invention, there is provided an overload relay holding device for an electric compressor, wherein in each of the inventions, the cover includes a lead portion of the wiring connected to the overload relay, and the wire and the sealed container corresponding to the lead portion. The drawer | drawing-out protrusion which intervenes in is formed.

  According to a fourth aspect of the present invention, there is provided an overload relay holding device for an electric compressor according to any one of the first to third aspects, wherein a plurality of wires connected to the overload relay are defined in the cover. Partition projections are formed.

  According to the present invention, the overload relay is provided on the inner surface of the terminal cover and includes a holding portion that holds the overload relay. The overload relay is attached to the terminal fence in a state where the terminal cover is attached to the terminal fence. Since it abuts, the overload relay can be stably held.

  In particular, the overload relay can be held in contact with the terminal fence simply by attaching the terminal cover to the terminal fence with a simple configuration in which the holding portion is formed in the terminal cover. As a result, the overload relay can be easily attached, and the workability of the attachment can be improved. Further, the rise in manufacturing cost can be eliminated as much as possible, or the manufacturing cost can be reduced.

  According to the invention of claim 2, in the above invention, the holding portion has an inner surface shape that substantially matches the outer surface shape of the overload relay, and a notch into which the wiring terminal connected to the overload relay can enter is formed. Therefore, regardless of the position of the terminal of the overload relay, the overload relay can be attached in the holding portion and stably held.

  Furthermore, according to the invention of claim 3, in each of the above inventions, the cover includes a lead portion of the wire connected to the overload relay, and a lead portion protrusion interposed between the wire and the sealed container corresponding to the lead portion. Therefore, by disposing the wiring from the lead-out portion so as to pass over the lead-out projection, the problem of the wiring extending outside the cover coming into contact with the sealed container of the electric compressor is eliminated. be able to. Moreover, since the drawer part can be concealed by the drawer part projection, the entry of water from the drawer part into the cover can be suppressed.

  According to a fourth aspect of the invention, in the invention according to any one of the first to third aspects, a partition projection for partitioning a plurality of wires connected to the overload relay is formed in the cover. By the partition projections, the wiring in the cover can be arranged and a short circuit between the wiring terminals can be prevented.

  The present invention is made in order to stably hold an overload relay attached to a terminal located on the outer surface of an airtight container of an electric compressor at a low cost. Thus, with the purpose of stably holding the overload relay at a low cost, with a holding portion that holds the overload relay on the inner surface of the terminal cover, the terminal cover is attached to the terminal fence, This was realized by making the overload relay abut on the terminal fence. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a state in which a terminal cover is attached to an electric compressor. The electric compressor 10 of the present embodiment is a rotary type compressor that includes a sealed container 12, an electric element (drive element) (not shown) in the closed container 12, and a rotary compression element driven by the electric element. It is. In FIG. 1, reference numeral 12 </ b> B denotes a steel plate end cap (lid member) that closes an opening at one end of the container body of the sealed container 12 of the rotary compressor 10. A terminal 20 for supplying electric power to the electric element is attached to the outer surface of the end cap 12B through the end cap 12B. A plurality of conductive pins 21 are supported on the terminal 20.

  A terminal fence 30 made of a steel plate is fixed to the outer surface of the terminal 20 so as to surround the terminal 20, and the terminal cover 1 is removably engaged and attached to the terminal fence 30. The terminal fence 30 is a holding member for the terminal cover 1 for stably holding the terminal cover 1 on the outer periphery of the terminal 20.

  Here, a specific configuration of the terminal fence 30 will be described with reference to FIGS. 2 is a front view of the terminal fence 30, FIG. 3 is a right side view of the terminal fence 30, FIG. 4 is a left side view of the terminal fence 30, FIG. 5 is a plan view of the terminal fence 30, and FIG. Each figure is shown. As shown in FIGS. 2 to 6, the terminal fence 30 includes a substantially flat base portion 32 fixed to the outer surface of the end cap 12 </ b> B of the sealed container 12, and an edge of the base portion 32 from the base portion 32. A plurality of receiving pieces 34 formed by bending substantially at right angles; and holding pieces 35 35 formed by bending both edges (left and right edges in FIG. 2) of the base portion 32 at substantially right angles; It has. Reference numeral 36 denotes a round hole that the terminal 20 faces.

  In this case, the front end portion 35A of the holding pieces 35, 35 is bent obliquely outward (in the left-right direction in FIG. 2) so as to gradually open, and is rectangular from the front end portion 35A to the base portion 32 side. An upper engagement hole 37 is formed.

  Next, the configuration of the terminal cover 1 will be described in detail with reference to FIGS. 7 is a front view of the terminal cover 1, FIG. 8 is a right side view of the terminal cover 1, FIG. 9 is a left side view of the terminal cover 1, FIG. 10 is a plan view of the terminal cover 1, and FIG. FIG. The terminal cover 1 of an Example is comprised from the hard synthetic resin. 7 to 10, reference numeral 2 denotes a rear surface of the terminal cover 1. When the terminal cover 1 is attached to the terminal 1, the rear surface 2 is located at the opposite end of the rotary compressor 10 (the upper end in this embodiment). To position. Reference numeral 3 denotes a wall extending from the edge of the back surface 2 at a substantially right angle. That is, the terminal cover 1 of the embodiment has a box shape with one end opened as shown in FIGS. Then, on the outer surface of the opposing wall portion 3 of the terminal cover 1 (the outer surface of the left and right wall portions 3 in FIG. 7), the engaging portion 4 that engages with the engaging holes 37 of the holding pieces 35, 35 of the terminal fence 30. 4 are integrally formed to project.

  A holding portion 5 of the overload relay holding device of the present invention is provided on the inner surface of the terminal cover 1. The holding unit 5 is for holding the overload relay 15 and is formed integrally with the terminal cover 1.

  The holding part 5 has an inner surface shape that substantially matches the outer surface shape of the main body 15A of the overload relay 15 having a substantially cylindrical shape. The holding portion 5 of the present embodiment is formed substantially vertically in the opening direction from the back surface 2 and has a curved wall portion 6 having an inner surface shape substantially matching the outer surface shape of the overload relay 15 as described above, and the wall portion. 6, and a partition projection 7. The notch 6 </ b> A has a disadvantage that the wiring terminal 17 (AMP terminal) connected to the terminal 16 of the overload relay 15 contacts the wall 6 and the overload relay 15 cannot be inserted into the holding unit 5. Is formed by cutting out a part of the wall portion 6 outward. The overload relay 15 having any shape of the terminal 16 can be attached to the holding portion 5 with the wiring terminal 17 connected to the terminal 16 by the cutout portion 6A.

  The partition protrusion 7 is a partition portion for partitioning a plurality of wires 18 connected to the overload relay 15. In this embodiment, as shown in FIG. 14, two wires 18A and 18B are connected to the overload relay 15, so that one wire 18A is connected to one end side (right end side in FIG. 14) of the partition projection 7 and the other wire. If 18B is disposed on the other end side (left end side in FIG. 14) of the partition projection 7, the wiring 18 connected to the overload relay 15 can be efficiently arranged. Thereby, the problem that the wiring 18 moves and becomes entangled and a short circuit occurs between the wiring terminals 17 connected to the terminal 16 can be solved.

  Incidentally, the wall portion 3 of the cover 1 is formed with a lead-out portion 8 cut into a substantially U shape from the opening edge toward the back surface 2. The lead-out portion 8 is for leading out the wires 18 and 23 from the terminal cover 1 to the outside. In addition, a drawer protrusion 9 is formed below the drawer 8 so as to correspond to the drawer 8. The lead-out projection 9 is formed integrally with the terminal cover 1.

  In order to attach the terminal cover 1 having the above-described configuration to the terminal 20, first, as shown in FIG. 12, the overload relay 15 is inserted from the opening side of the terminal cover 1 as shown by the arrow. As a result, the overload relay 15 is held by friction with the holding portion 5 (that is, held by contact friction between the wall portion 6 and the outer surface of the main body 15A), and the terminal cover 1 is held as shown in FIGS. It will be located in the part 5. 12 and 13 do not show the wiring terminal 17 and the wiring 18 connected to the terminal 16, but the wiring terminal 17 and the wiring 18 are connected to the terminal 16 of the overload relay 15 attached to the terminal cover 1. It is in the attached state.

  Here, when the terminal 16 is located in the vicinity of the outer surface edge of the main body 15A as in the overload relay 15 of the present embodiment, when the wiring terminal 17 is connected to the terminal 16, the edge of the wiring terminal 17 becomes the outer surface shape of the main body 15A. And the contact with the wall 6 or the edge of the wiring terminal 17 protrudes outward from the outer surface shape of the main body 15A, and the overload relay 15 may not be inserted into the holding portion 5. . However, by forming the notch 6A as in the present embodiment, the wiring terminal 17 can enter the notch 6A as shown in FIGS. Thereby, the overload relay 15 can be inserted into the holding part 5. Therefore, regardless of the position of the terminal 16 of the overload relay 15, the overload relay 15 can be mounted in the holding portion 5 and stably held.

  On the other hand, the terminal fence 30 is attached to the outer surface of the terminal 20 by welding and fixing the peripheral portion of the base portion 32 to the end cap 12B with the terminal 20 facing the round hole 36.

  Next, in order to attach the terminal cover 1 to the terminal fence 30, the cluster 25 is attached from the outer surface of the terminal 20 to cover the conductive pins 21, and then the wires 23, connected to the conductive pins 21,. The wiring 18 (wiring 18A and wiring 18B) connected to the overload relay 15 is extended from the lead-out portion 8 to the outside. At this time, it arrange | positions so that each wiring 18 and 23 may pass the upper part of the extraction | drawer part protrusion 9. FIG. Thus, by arranging the wires 18 and 23 from the drawing portion 8 so as to pass over the drawing portion protrusion 9, the terminal cover 1 does not contact the wires 8 and 23 with the sealed container 12 of the rotary compressor 10. It can be extended to the outside.

  That is, since the sealed container 12 of the rotary compressor 10 becomes high temperature by operation, when the wires 18 and 23 come into contact with the sealed container 12, the wires 18 and 23 may melt and short-circuit. However, by arranging the wires 18 and 23 from the lead-out portion 8 so as to pass over the lead-out projection 9 as in the embodiment, the wires 18 and 23 and the sealed container 12 correspond to the lead-out portion 8. Since the lead-out projection 9 is positioned, it is possible to eliminate the inconvenience that the lead-out projection 9 causes the wires 18 and 23 extending to the outside of the cover 1 to contact the sealed container 12 of the rotary compressor 10.

  Furthermore, since the drawer protrusion 9 in this embodiment is a position corresponding to the drawer 8 and is formed below the drawer 8, the drawer 8 can be concealed by the drawer protrusion 9. . For this reason, it becomes possible to suppress the ingress of water from the drawer portion 8 into the cover 1. Thereby, a waterproof effect can be expected.

  On the other hand, as shown in FIG. 16, the opening of the terminal cover 1 is made to oppose the terminal fence 30, and the terminal cover 1 is slid to the airtight container 12 side (arrow direction of FIG. 16) in that state. At this time, the holding piece 35 of the terminal fence 30 is located outside the terminal cover 1. When the final mounting position is reached, the engaging portion 4 of the terminal cover 1 is engaged with the upper and lower portions of the engaging hole 37 of the holding piece 35 from the inside in a freely detachable manner.

  The terminal cover 1 is attached to the terminal fence 30 by the engagement of the engaging hole 37 and the engaging portion 4. In this state, the bottom surface of the overload relay 15 is connected to the base portion 32 of the terminal fence 30 as shown in FIG. Abut. As described above, the overload relay 15 is stably held by the terminal fence 30 and the holding portion 5 of the terminal cover 1 according to the present invention. The terminal 20 is located in a position indicated by a broken line in FIG. 14 in the terminal cover 1 with the terminal cover 1 attached, that is, a position close to the terminal 20 via the overload relay 15 and the holding portion 5.

  As described in detail above, the overload relay 15 is attached to the terminal fence 30 by attaching the terminal cover 1 to the terminal fence 30 with a simple configuration in which the holding portion 5 is formed in the terminal cover 1 as in the present invention. It can come into contact and can be held stably.

  In particular, according to the present invention, the overload relay can be stably overloaded without being fixed to the starting relay with a clip as in the past or without changing the overload relay itself to a shape that can be fixed by inserting a conductive pin of the terminal. The relay 15 can be held. As a result, the number of parts can be reduced and the mounting operation can be simplified. Overall, the manufacturing cost can be reduced.

  In the present embodiment, the overload relay 15 has the terminal 16 positioned near the outer surface of the main body 15A as shown in FIG. 14, but the position of the terminal 16 is not limited to this, for example, As shown in FIG. 18, both terminals 16 may be arranged diagonally from the axis of the main body 15A, or both terminals may be provided near the outer periphery of the main body 15A as shown in FIG. According to the present invention, even such an overload relay 15 can be attached and stably held without any trouble. Further, the number of terminals of the overload relay 15 of the present invention is not limited to two as in the embodiment, and may be three or more.

It is a side view which shows the state which attached the terminal cover of one Example of this invention to the electric compressor. It is a front view of a terminal fence. It is a right view of the terminal fence of FIG. It is a left view of the terminal fence of FIG. It is a top view of the terminal fence of FIG. It is a bottom view of the terminal fence of FIG. It is a terminal cover front view of FIG. It is a right view of the terminal cover of FIG. It is a left view of the terminal cover of FIG. It is a top view of the terminal cover of FIG. It is a bottom view of the terminal cover of FIG. It is a figure which shows the plane cross section of the terminal cover of FIG. 1, and the side surface of an overload relay. It is a figure which shows the state which attached the overload relay in the terminal cover of FIG. It is a front view which shows the state which attached the overload relay to the terminal cover of FIG. It is an enlarged view of the principal part of FIG. It is a sectional side view of the terminal cover of the state which attached the overload relay, and the end cap (part) of an electric compressor. It is sectional drawing which shows the state which attached the terminal cover to the terminal fence. It is a front view of the state which attached the overload relay of the other Example to the terminal cover of FIG. It is a front view of the state which attached the overload relay of another another Example to the terminal cover of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal cover 2 Back surface 3 Wall part 4 Engagement part 5 Holding part 6 Wall part 6A Notch part 7 Compartment protrusion 8 Pull-out part 9 Lead-out part protrusion 10 Rotary compressor (electric compressor)
DESCRIPTION OF SYMBOLS 12 Sealing container 12B End cap 15 Overload relay 16 Terminal 17 Wiring terminal 18 Wiring 20 Terminal 21 Conductive pin 23 Wiring 25 Cluster 30 Terminal fence 32 Base part 34 Receiving piece 35 Holding piece 36 Round hole 37 Engagement hole

Claims (4)

In an electric compressor comprising a terminal fence fixed to the outer surface of the sealed container so as to surround a terminal provided in the sealed container, and a terminal cover attached to the terminal fence so as to cover the terminal,
An overload relay; and a holding portion that is formed on an inner surface of the terminal cover and holds the overload relay, and the overload relay is attached to the terminal fence in a state where the terminal cover is attached to the terminal fence. An overload relay holding device for an electric compressor characterized by contacting.   2. The holding portion according to claim 1, wherein the holding portion has an inner surface shape that substantially matches an outer surface shape of the overload relay, and a notch into which a wiring terminal connected to the overload relay can enter. The overload relay holding | maintenance apparatus of the electric compressor of description.   The said cover is formed with a lead-out portion of a wire connected to the overload relay, and a lead-out projection that is interposed between the wire and the sealed container corresponding to the lead-out portion. An overload relay holding device for an electric compressor according to claim 1 or 2.   4. The overload of the electric compressor according to claim 1, wherein a partition projection for partitioning a plurality of wires connected to the overload relay is formed in the cover. Load relay holding device.

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