JPS5921966A - Method of fixing solenoid valve for changing over refrigerant flow path of refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for fixing a solenoid valve for switching a refrigerant flow path in a refrigerator, which fixes the solenoid valve in a heat-insulated, moisture-proof, and sound-proof state.

[Technical background of the invention]

Conventionally, the solenoid valve was wrapped in a heat insulating material such as urethane foam and stored in a case, and the case was placed on the inside back of a safety box with the back side open, and then the back of the outer box was placed along with the back of the case. Instead of closing the box and filling the outer box with TLFRP material such as urethane foam.

[Problems with background technology]

Simply wrapping the solenoid valve in insulation material will provide insulation and moisture resistance.

If soundproofing is insufficient and the solenoid valve is cooled by the refrigerant flowing inside it, there is a problem that condensation occurs and water accumulates inside the case, or that the switching sound leaks outside when switching is performed. Furthermore, when filling the outer box with a heat insulating material such as urethane foam, if this leaks into the case, the heat insulating material is hard and the work of removing the solenoid valve when repairing the solenoid valve becomes extremely troublesome. Therefore, there was a problem that sealing had to be performed reliably.

[Purpose of the invention]

Thu) D-mei aims to provide a method for fixing a solenoid valve for switching a refrigerant flow path in a refrigerator, which has excellent heat insulation, moisture proofing, and sound proofing properties, and requires almost no sealing of the case.

[Summary of the invention]

The present invention improves heat insulation, moisture proofing, and soundproofing by filling the outer box with a heat insulating material such as urethane foam after filling the case with a weak or brittle foamed resin. The case can be sealed with a foamable resin filled inside the case.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings. First, in Figure Pg1 showing the completed Cane Bear, 1 is an outer box with an open back for forming a heat-insulating box, and inside this, although not shown, there is an inner box that constitutes a freezer compartment and a refrigerator compartment. . 2
The case 2 is made of a memory stick and has an open back, and the case 2 is placed on the inside back of the outer box 1. 3 is a solenoid valve, and this solenoid valve 3 operates according to the temperature of the freezer compartment and refrigerator compartment.
The function is to switch the refrigerant flow path such that the refrigerant flows through both the refrigerator compartment cooler and the freezer compartment cooler, or the refrigerant flows only through the freezer compartment cooler. Such a solenoid valve 3 is a case 2
A back plate 4 is fixed to a fringe 1a bent and formed on the back periphery of the outer box 1 by means of screws or the like. This back plate 4 closes the back of the outer box 1 together with the back of the case 2. 5 is a heat insulating material filled in the case 2 and made of a soft or brittle foamed resin such as urea resin, and 6 is a heat insulating material made of foamed urethane filled between the outer box 1 and the aforementioned inner box (not shown).

Next, in the above configuration, there is a second method for fixing the solenoid valve B.
This will be explained with reference to FIGS. 6 to 6.

First, as shown in FIG. 2, the solenoid valve 32 is placed inside the case 2 and fitted into the temporary fixing rig 2a. In this way, the solenoid valve 3 is housed, and as shown in FIG.
(first step), then as shown in Figure 4,
Backboard 4? Screw the outer box 1 to the flange 1a and close the back of the outer box 1 together with the back of the case 72 (second step) 6.
As shown in the figure, urea resin 5 is injected and filled into the case 2 through a small hole (not shown) previously formed in the back plate 4 (third step). At this time, the urea resin 5 is applied to the case 2, the flange 1a, the flange 1a and the back plate 4. It closes each seam between the case 2 and the back plate 4, and some of it leaks out from the seam. Finally, as shown in FIG. 6, the outer box 1 is filled with a heat insulating material 6 made of urethane foam (fourth step). At this time, the foamed urethane expands with considerable foaming pressure, but since the seams between the case 72, the fringe 1a, and the back plate 4 are blocked by the urea resin 5, one foamed urethane is inside the case 2. There is no risk of infiltration. When the urethane foam is completely cured, the case 2 is completely fixed, and the solenoid valve 3 is completely fixed.

According to the above configuration, the solenoid valve 3 is embedded in the urea resin 5 filled in the case 2, so that the solenoid valve 3 is insulated and
Moisture-proofing and soundproofing properties are improved, and there is almost no condensation on the solenoid valve 3 or the sound generated during switching operation leaking outside. Further, since the urea resin 5 is fragile, the urea resin 5 can be easily removed when repairing the solenoid valve 3 or the like. Furthermore, since the heat insulating material 6 is filled after filling the urea resin 5, the space between the case 2, the fringe 1a and the back plate 4 is closed with the urea resin 5, and the urethane foam 1 penetrates into the case 2. This can be reliably prevented,
Therefore, there is almost no need to seal the case 2. By not applying a seal, even if the urea resin 5 leaks from between the fringe 1a and the back plate 4 during filling, the urea resin 5 is fragile and can be easily removed.

In addition, remove the foamed resin filled into the case 2, and remove the bar ff-
Not only the rear resin but also other soft or brittle resins cause problems. Similarly to urethane, urea resin can be foamed on-site, but unlike urethane, the foaming pressure is o, o 1.
kQ7ryt? The expansion ratio is as small as 4 to 5, and density adjustment is easy.

〔Effect of the invention〕

As explained above, the present invention has nine outstanding effects such as improved heat insulation, moisture proofing, and sound proofing properties, and almost no need for sealing treatment to prevent the heat insulating material filled inside the outer box from penetrating into the case. play.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a sectional view showing the completed form, and FIGS. 2 to 6 being schematic sectional views showing the steps in order. In the figure, 1 is the outer box, 2 is the case, 3 is the solenoid valve, 4 is the back plate,
5 is a urea resin (foamed resin), and 6 is a heat insulating material.

Claims (1)

[Claims] 1. A case with an open back and a solenoid valve stored inside the back of an outer box for forming an insulated box with an open back? A method for fixing a solenoid valve for switching a refrigerant flow path in a refrigerator, comprising a first step of arranging the solenoid valve, and a fourth step of filling the back side of the outer box with a heat insulating material such as urethane to close the back side of the outer box together with the back side of the case.