JPS6224064Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a plug-in type starting relay and an overload relay that have a built-in positive temperature coefficient thermistor element that is directly connected to the input terminal provided on the outer shell of an electric compressor used in refrigerators, etc. This invention relates to an improvement of a starting device for an electric compressor.

To explain the conventional structure with reference to FIGS. 1 to 3, the outer shell 1 of an electric compressor normally has a main winding terminal 2a (hereinafter referred to as "M terminal") and an auxiliary winding terminal 2b (hereinafter referred to as "A terminal"). (referred to as “terminal”) and common terminal 2c
Three input terminals (hereinafter referred to as "C terminals") are provided. First, the overload relay 3 is fixed to the outer shell 1 of the electric compressor using the fixing spring 4 (arrow P ₁ ), and then the connection socket terminal 5 of the overload relay 3 is press-fitted to the C terminal 2c. (arrow P ₂ ). Next, the connection socket terminal 5 is made of a heat-resistant insulating material that houses a positive temperature coefficient thermistor element (not shown) and two socket terminals 6a and 6b provided on an electrode plate that holds the positive temperature coefficient thermistor element. A case 7 having a retaining protrusion 7a of
and socket terminals 6a, 6b of a starting relay 9 constituted by a case 7 and a cover 8 forming a box.
Insert and fit into M terminal 2a and A terminal 2b (arrow P ₃ )
It has been assembled and formed by making electrical connections. Note that 8a and 8b are holes for insertion into input terminals. However, the socket terminal 6 of the starting relay 9
If the two input terminals A and 6B are inserted and fitted into two of the three input terminals, M terminal 2a and A terminal 2b, provided on the outer shell of the electric compressor, vibrations may occur during operation of the electric compressor or during transportation. Not only does the vibration of the starting relay 9 act on the weight of the starting relay 9, causing the insertion and fitting part to separate and stop functioning, but it is also relatively difficult to assemble the input terminal part 2 of the electric compressor. In particular, it was difficult to insert the single connection socket terminal 5 into the C terminal 2c, and the starting relay 9 had to be inserted and set separately, which was disadvantageous.

The present invention was developed based on these drawbacks. In other words, when installing the starting relay and overload relay to the input terminal section of the electric compressor, insert and secure the socket terminal that connects the overload relay to the input terminal into the dedicated storage space provided above the child starting relay. Therefore, the above-mentioned drawbacks are solved by inserting and fitting three socket terminals into the input terminal of the electric compressor at the same time and assembling them.

Hereinafter, details of the present invention will be explained with reference to an embodiment shown in FIGS. 4 to 8. In the figures, the same reference numerals as in the conventional example indicate the same parts. The difference from the conventional one is that there is a socket terminal 10 that connects the overload relay 3 to the C terminal 2c of the input terminal section 2 provided on the outer shell 1 of the electric compressor, and a plug-in type start-up with a built-in positive temperature coefficient thermistor element. This is case 12 of relay (hereinafter referred to as "starting relay") 11. That is, a cut-and-raised part 10a is provided at the bottom of the fitting grip part of the socket terminal 10 to prevent it from coming off, and a cut-and-raised part 10a to prevent it from coming off is provided at the top of the case 12 of the starting relay 11 to accommodate the socket terminal 10. Storage part 1 having a protrusion 12a that engages with and fixes the part 10a
2b. In addition, the cover 13 that forms a box together with the case 12 has holes 13a for the conventional M terminal 2a and holes A for inserting the electric compressor input terminal.
In addition to 13b for terminal 2b, it also has 13c for C terminal.

The starting device with the above structure is assembled by first fixing the overload relay 3 to the outer shell 1 of the electric compressor using the fixing spring 4 (arrow P ₁ ), and then connecting the overload relay 3 to the electric compressor input terminal. Socket terminal 1 for connection
0 to the case 12 located above the starting relay 11
into the space formed by the storage portion 12b and the cover 13 (arrow P ₂ ). At this time, the cut-out portion 10a provided at the bottom of the fitting grip portion of the socket terminal 10 to prevent the socket terminal from coming off is inserted into the storage portion 1 of the case 12.
It is fixed by engaging with a protrusion 12a provided on the bottom of 2b. Thereafter, the starting relay 11 is inserted and fitted into the input terminal section 2 provided on the outer shell 1 of the electric compressor to electrically connect it (as indicated by the arrow).
_P3 ). Therefore, compared to the conventional case, the socket terminal 1 for connecting the overload relay 3 to the electric compressor input terminal section 2 is
0, case 12 and cover 1 of starting relay 11
3, the socket terminal 10 for connection from the starting relay 11 and the overload relay 3,
The input terminal section 2 of the electric compressor can now be inserted and fitted using three socket terminals, increasing the fitting strength and making it relatively difficult to assemble the input terminal section 2 of the electric compressor. It is only necessary to insert the starting relay 11 into the connector, which simplifies the connection and assembly. In addition, a single connection socket terminal 10
Since the starting relay 11 is fitted with the starting relay 11 whose position can be changed freely, the work is easy.

As is clear from the above description, the present invention is a plug-in type starter that includes a compressor, a motor having a main winding and an auxiliary winding, and a positive temperature coefficient thermistor element connected in series with the auxiliary winding. It has a relay and an overload relay connected in series with the main winding, and a socket terminal connected from the overload relay to the input terminal of the motor is provided with a cut-and-raised part for preventing it from coming off, and the socket terminal is connected to the input terminal of the motor. A housing portion having a protrusion is formed in the case of the starting relay to be connected, the socket terminal is stored in the housing portion, and the protrusion is engaged and fixed with the cut-out portion for preventing the connector from falling out. By just slightly changing the structure of the conventional overload relay and plug-in type starting relay with a built-in positive temperature coefficient thermistor element, the insertion and fitting of the starting relay and connection socket terminal and the input terminal of the electric compressor can be changed to three wires. This can now be done with a socket terminal, increasing the mating strength and eliminating the possibility of the insertion and mating part coming off due to vibration during transportation or operation. Since it can be installed on the movable starting relay side rather than on the machine, it is necessary to insert only the starting relay into the input terminal section of the electric compressor, which is difficult to assemble in terms of assembly time. Moreover, it can be inserted at 3 points. This has great practical effects, such as ease of positioning and advantages.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view showing the assembly procedure of a conventional starting device for an electric compressor, Figure 2 is a plan view showing the electric compressor mounting surface of a plug-in type starting relay that incorporates the thermistor element with the same positive characteristic; Figure 3 is a side view showing the installation state of the starting relay, Figure 4 is an exploded perspective view showing the assembly procedure of the starting device for an electric compressor according to an embodiment of the present invention, and Figure 5 is the installation of the starting relay. Figure 6 is a perspective view of the socket terminal from the overload relay, Figure 7 A, B, and C are front, side, and rear views of the starting relay, and Figure 8 is Figure 7 H. FIG. 1... Outer shell (compressor), 3... Overload relay,
6a, 6b...Socket terminal, 9...Start relay, 10a...Rising portion, 12a...Protrusion.

Claims (1)

[Scope of utility model registration request] A compressor, an electric motor that drives the compressor and has a main winding and an auxiliary winding, and a plug that includes a positive temperature coefficient thermistor element connected in series with the auxiliary winding and is connected to an input terminal of the motor. It has an in-type starting relay and an overload relay connected in series with the main winding, and a socket terminal connected from the overload relay to the input terminal of the motor is provided with a cut-out portion for preventing disconnection. , a housing section having a protrusion is formed in the case of the starting relay, the socket terminal is housed in the housing section, and the protrusion is engaged and fixed with the cut-out part for preventing the terminal from falling out. Device.