JP4794236B2 - Start relay device - Google Patents

Description

The present invention relates to a starting relay device used for a single-phase induction motor or the like.

  As shown in FIGS. 5 and 6, an electric compressor in which a start relay 10 for imparting a startability improving function is detachably attached to a terminal 32 of a sealed container 31 that houses a main body functional part of the compressor. 30 is well known (see, for example, Patent Documents 1 and 2).

  In such an electric compressor 30, a plurality of pin terminals 33 are erected on a terminal 32 installed on the outer shell of the hermetic container 31, and the plurality of pin terminals 33 are formed from a synthetic resin of the starting relay 10 or the like. The mechanical integration of the start relay 10 and the electric compressor 30 and the electrical connection are simultaneously shown in the terminal hole 12 provided in the dielectric (electrical insulator) casing 11. It has been.

  However, depending on where the electric compressor 30 is installed, the start relay 10 may not be attached to the pin terminal 33 due to the presence of an obstacle. In such a case, for example, the start relay 10A having a screw hole is fixed to the compressor mounting plate 45 or the like using the screw 13 as shown in FIG. It is electrically connected each time.

Since the present invention relates to a starting relay mounting structure, a detailed description of the function of the starting relay is omitted, but in brief, the starting relay 10 (A) is placed inside a dielectric casing 11. There is provided a resistance element 15 made of an appropriate substance having a positive temperature coefficient of resistance, for example, barium titanate ceramics (Curie point 130 ° C.) whose electrical resistance rapidly increases when heated to a predetermined temperature or higher. As shown in FIG. 4, the element 15 is connected in series to the auxiliary winding 35 of the single-phase induction motor 34 that is a drive function unit of the electric compressor 30. In the figure, 36 is a main winding, 37 is an overload relay, 38 is a capacitor, and 39 is a single-phase commercial power source .

  At the time of starting the single-phase induction motor 34, the resistance element 15 has a low electric resistance because the temperature is low, and a large starting current flows through the auxiliary winding 35. Therefore, the single-phase induction motor 34 can be started smoothly. To do.

  Thereafter, the resistance element 15 self-heats due to the current flowing through itself and the temperature rises, so that the electrical resistance increases, the current flowing through the auxiliary winding 35 decreases, and the current prevents the current from flowing more than necessary. To do.

Japanese Utility Model Publication No.59-34466 JP 2001-322159 A

  Conventionally, two types of starter relays for electric compressors are always in stock: a plug-in type starter relay that is attached using a pin terminal of the compressor and a separate type relay that is attached using a screw or the like.

  The two types of starter relays have the same internal structure except for the mounting method, and the separate type starter relay is more expensive than the plug-in type starter relay. It was necessary to be able to replace a separate starter relay, and the solution was a problem.

The present invention relates to a starter relay apparatus used in the electric compressor, a starter relay apparatus used in the electric compressor, the electric compressor is provided with a with pin terminals terminal, the starting relay, electric compressor A plug-in system that has a terminal hole that can be mounted by fitting to a pin terminal of the motor, and that connects the electric compressor to the starting relay by fitting the pin terminal of the electric compressor into the terminal hole of the starting relay And a terminal of the starting relay using an adapter that is attached to a member other than the electric compressor, and a pin terminal that can be fitted into the terminal hole, and a terminal for connection in which each of the pin terminals is connected by a copper wire. the holes, causes fitting the pin terminals of said adapter, connecting terminals of the adapter and electric compressor By connecting the pin terminal in the conductor, start relay, wherein the starting cell relay to connect the electric compressor, a separately installed system using the adapter and configured to alternate both, it Device .

  According to the present invention, if an adapter having a terminal hole is fixed to an appropriate part other than the compressor with a screw or the like, the attachment to an electric compressor having a terminal with a pin terminal is connected to the terminal hole and the pin terminal of the compressor. Can be easily installed by fitting the pin terminal of the adapter and the terminal hole of the start relay, so that it can be attached to an appropriate part other than the compressor, such as an electrical box. The plug-in type start relay can be easily installed.

  In other words, it has a pin terminal but does not have a resistance element, so it only requires an adapter that can be manufactured at low cost, and can be attached to an electric compressor equipped with a terminal with a pin terminal. A plug-in type start relay capable of being fitted to a pin terminal can be easily diverted as a separate type start relay.

  Therefore, since it is not necessary to stock two types of starting relays having a resistance element, inventory management is simplified and the cost of inventory parts can be reduced.

Fix the starting relay mounting adapter to the compressor electrical box, or install the mounting projection from the beginning in the electrical box, and attach it to the electric compressor with a terminal with pin terminals. A start relay device , wherein a start relay is attached to an electrical box by inserting a pin terminal provided on an adapter into a terminal hole of a start relay that can be engaged with a pin terminal of a compressor.

Hereinafter, an embodiment of the present invention will be described in detail mainly with reference to FIGS. In order to facilitate understanding, in these drawings, parts having the same functions as those described in the drawings are given the same reference numerals, and descriptions thereof are omitted within a range that does not hinder understanding.

Also in the starting relay 10A of the starting relay device of the present invention, the pin terminal 33 provided on the terminal 32 of the electric compressor 30 shown in FIG. 6 can be fitted into the dielectric casing 11 made of synthetic resin or the like. A plurality of terminal holes 12 are provided.

  In addition, a resistance element (not shown) made of, for example, barium titanate ceramics (Curie point 130 ° C.), whose electrical resistance increases rapidly when heated to a predetermined temperature or higher, is provided inside the housing 11. ) Is housed, and basically has the same configuration as the starting relay 10 shown in FIGS.

  The adapter 20 includes a plurality of pin terminals 22 connected to a dielectric housing 21 made of a synthetic resin or the like, and a plurality (the same number as the pin terminals 22) of connection terminals 23 connected to each pin terminal by a copper wire (not shown). A plurality of screw holes 24 are provided.

  The plurality of pin terminals 22 are provided in the same shape as the pin terminal 33 provided in the terminal 32 of the electric compressor 30 illustrated in FIG. 6 so as to be fitted in the terminal hole 12 of the starting relay 10A.

Therefore, the start relay 10A and the adapter 20 of the start relay device are structurally integrated with the start relay 10A and the adapter 20 by inserting the pin terminal 22 of the adapter 20 into the terminal hole 12 of the start relay 10A. At the same time, it is electrically connected.

  On the other hand, the adapter 20 causes the plurality of screw holes 24 to face, for example, the plurality of through holes 52 formed in the back plate 51 of the electrical box 50, and inserts the screws 25 into the screw holes 24 and the through holes 52. The adapter 20 can be fixed inside the electrical box 50 by screwing and tightening the nut 26 to the 25 protruding male screw portions.

  Accordingly, the start relay 10A can be easily mounted in the electrical box 50 by fitting the pin terminal 22 of the adapter 20 fixed in the electrical box 50 as described above into the terminal hole 12 of the start relay 10A. .

  Then, by connecting the connection terminal 23 of the adapter 20 and the required terminal of the electric compressor 30 via a conductive wire, the wiring can be made easier and the starting characteristics by the starting relay 10A are improved. It can be a compressor.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit described in the claims.

  For example, the start relay 10A may be mechanically integrated with the overload relay 37 shown in FIG. 4 that opens the circuit and shuts off electricity when the motor is overheated.

  In addition, when the starting relay 10A is provided with a terminal for connection, the adapter 20 can be made entirely of a dielectric made of an inexpensive synthetic resin or the like including the pin terminal 22.

It is explanatory drawing of the relay and adapter which are used for the starting relay apparatus of this invention. It is explanatory drawing (perspective view) which shows the starting relay apparatus of this invention. It is explanatory drawing which shows the starting relay apparatus (side view) and electric compressor of this invention. It is a connection diagram of a starting relay. It is explanatory drawing which shows the 1st prior art. It is explanatory drawing which shows a 2nd prior art. It is explanatory drawing which shows a 3rd prior art.

10, 10A Start relay 11 Housing 12 Terminal hole 13 Screw 15 Resistance element 20 Adapter 21 Housing 22 Pin terminal 23 Connection terminal 24 Screw hole 25 Screw 26 Nut 30 Compressor 31 Sealed container 32 Terminal 33 Pin terminal 34 Electric motor 35 Auxiliary winding Wire 36 Main winding 37 Overload relay 38 Capacitor 39 Power supply 45 Compressor mounting plate 50 Electrical box 51 Back plate 52 Through hole

Claims (3)

A starting relay device used for an electric compressor,
The electric compressor includes a terminal with a pin terminal,
The starting relay includes a terminal hole that can be attached by fitting to a pin terminal of an electric compressor,
A plug-in system for connecting an electric compressor to the starting relay by fitting a pin terminal of the electric compressor into a terminal hole of the starting relay;
Using an adapter attached to a member other than the electric compressor, which includes a pin terminal that can be fitted into the terminal hole, and a connection terminal in which each of the pin terminals is connected by a copper wire, the terminal hole of the start relay In addition to inserting the pin terminal of the adapter and connecting the terminal for connection of the adapter and the pin terminal of the electric compressor with a conductive wire, the electric compressor is connected to the starting relay. The placement method,
Configured to be used both
A starting relay device . An adapter is attached to the electrical box,
2. The starting relay device according to claim 1, wherein the pin terminal of the adapter is fitted into the terminal hole, and the starting relay is integrally attached to the electrical box. The adapter is screwed,
The start relay device according to claim 1 or 2, wherein the pin terminal is fitted into the terminal hole and the start relay is integrally attached to the adapter .

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