JPH0141983Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a housing for fitting a solenoid valve coil and a solenoid valve body of a solenoid valve used in a refrigerant circuit of a cooling and heating device.

A conventionally known general solenoid valve includes a magnetic casing 6 and a non-magnetic plate 4 surrounding an armature 7 and a valve, with a fixed core 5 provided above the plate 4 and an inlet located below the casing. When fitting the solenoid valve body, which has a pipe 8 and an outlet pipe 9 protruding downward, to the housing 1, the coil 2 is inserted through the front opening of the housing 1 (as shown in Fig. 1), and then the solenoid valve The valve body is inserted through the lower opening of the housing 1, and the upper end of the fixed core 5 and the housing 1 are screwed together with bolts 3. Therefore, during assembly, a clearance 15 of approximately 0.5 mm was required between the inner diameter of the lower opening of the housing 1 and the outer diameter of the casing 6 of the solenoid valve body. Leakage magnetic flux occurs in the magnetic circuit formed by the solenoid valve, which deteriorates the magnetic efficiency of the solenoid valve. In addition, problems such as insufficient tightening of screws and loosening due to vibration occur during the processing process, resulting in poor magnetic efficiency.

The present invention was devised to solve the above-mentioned problems, and the housing 1, which was conventionally formed by bending into a box shape, is divided into two parts: a gate-shaped housing 1a and a plate-shaped housing 1b. The plate-shaped housing 1b is always brought into contact with the lower surface of the casing 6 of the solenoid valve body, and the gate-shaped housing 1a, the plate-shaped housing 1b, and the casing 6 are kept in a gap-free state to prevent a decrease in magnetic efficiency. It is.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

In the present invention, as shown in FIGS. 2 and 8, the housing itself is divided into a gate-shaped housing 1a having caulked portions 11, 11 at the lower end and a plate-shaped housing 1b. The plate-shaped housing 1b has a flange portion 6 of the casing 6 in the center.
A hole 12 having a diameter slightly smaller than the diameter of a and a notch 14 extending from the hole to the outer peripheral end are provided at an arbitrary position, and the caulking portion 1 of the portal-shaped housing 1a is provided.
A slit 13 for fitting 1 is provided across the hole 12, with one slit 13 spanning the notch 14 and the other on the opposite side. The notches 14 are for passing the outlet pipe 9 and the inlet pipe 8, which are provided to protrude below the casing 6 of the solenoid valve body, respectively.

Next, the assembly of the solenoid valve according to the present invention will be explained.

First, the solenoid valve coil 2 is inserted into the fixed core 5 of the solenoid valve body, and the gate-shaped housing 1a is inserted from above.
, and fix the upper end 10 with the bolt 3.

Next, the plate-shaped housing 1b is passed through the inlet pipe 8 and outlet pipe 9 of the solenoid valve body from below the solenoid valve body, and the lower end crimped portion 1 of the gate-shaped housing 1a is passed through the solenoid valve body.
1 into the slit 13 of the plate-shaped housing and securely caulked. At this time, the plate-shaped housing 1
It goes without saying that b is in contact with the lower surface of the flange portion 6a of the casing 6.

Next, the function and effect of the present invention will be explained. As shown in FIG. 4, the present invention has the following advantages:
The plate-shaped housing 1b and the casing 6 are securely in contact at the flange 6a of the casing 6, and there is no gap between them, so there is no magnetic flux leakage due to the clearance 15 as in the conventional case, and the magnetic efficiency of the solenoid valve is improved. can be raised. In other words, it is possible to lower the minimum operating voltage of the solenoid valve body and reduce the power of the solenoid valve coil 2, thereby reducing power consumption. Cost reduction can also be achieved. In addition, it is possible to completely prevent a decrease in magnetic efficiency due to loosening of the bolts 3 due to vibration or the like by caulking the gate-shaped housing 1a and the plate-shaped housing 1b.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of a conventional solenoid valve, Fig. 2 is a perspective view of the gate-shaped housing of the invention, Fig. 3 is a perspective view of the plate-shaped housing of the invention, and Fig. 4 is the invention of the invention. FIG. DESCRIPTION OF SYMBOLS 1... Housing, 1a... Gate-shaped housing, 1b... Plate housing, 2... Solenoid valve coil, 3... Bolt, 4... Plate, 5... Fixed core, 6... Casing, 6a... ... Flange part of casing, 7 ... Armature, 8 ... Inlet pipe, 9 ... Outlet pipe, 10 ... Contact surface with fixed core, 11 ... Caulking part, 12 ... Center hole, 1
3...slit, 14...notch, 15...clearance.

Claims (1)

[Scope of utility model registration request] A solenoid valve coil 2 is attached to the fixed core 5 of the solenoid valve body, which has a fixed core 5 on the upper part of the plate 4 that encloses the valve with a casing 6 and a plate 4, and an inlet pipe 8 and an outlet pipe 9 below the casing 6. In a solenoid valve whose upper end is fitted and screwed to the housing 1, the housing 1 has a gate-shaped housing 1a having a caulked portion 11 at the lower end, and a diameter of a flange portion 6a of the casing in the center. Center hole 1 with a slightly smaller diameter
2 and a plate-shaped housing 1b having a notch 14 extending from the central hole 12 to the outer peripheral end, and a slit 13 which is a fitting part with the caulking part 11 of the gate-shaped housing 1a. The upper end 10 of the fixed core 5 of the housing 1a and the solenoid valve body
After tightening with bolts 3, the plate-shaped housing 1b is inserted from below the solenoid valve body, and the flange lower surface 6a of the casing 6 and the plate-shaped housing 1
This is a locking structure for a housing of a solenoid valve, in which the caulking part 11 of the housing 1a is passed through a slit 13 in a state where the housing 1a is in contact with the housing 1b, and the lower end of the caulking part 11 is caulked.