JPS5827353Y2 - Internal pressure adjustment device for refrigerators, etc. - Google Patents

Description

[Detailed description of the invention] This invention is a large-sized refrigerator, freezer, and refrigerated/frozen warehouse (
This invention relates to an internal pressure adjustment device for a refrigerator (hereinafter referred to as a refrigerator, etc.).

In recent large-sized refrigerators whose cooling retention temperature is extremely low, in addition to changes in the outside air temperature, abnormal differences in air pressure inside and outside the refrigerator occur due to changes in the temperature difference between the inside and outside the refrigerator at the time of startup, that is, when cooling is started or when defrosting is started.

Therefore, in order to prevent the difference in pressure between the inside and outside, the present applicant previously proposed Utility Model Application No. 107312/1984, but the pressure regulating valve had too good sensitivity and caused problems in the freezing and refrigeration capacity.

In other words, in large refrigerated warehouses, etc., the valves are opened and released due to the mobilized pressure near the regulating valve due to the airflow inside the warehouse due to the rotation of the cooling fan to equalize the temperature inside the warehouse, or the valve is opened and closed due to a slight difference in internal and external pressure. The purpose of the present invention is to provide an adjusting device that does not operate when the internal and external pressure difference is below a certain value, since it has the drawback of decreasing efficiency.

Large refrigerators, etc. have different thicknesses of their component insulation panels depending on demand.

Therefore, the allowable stress and allowable slack for a constant span length are also different.

Therefore, it is preferable that the adjusting device can be used for refrigerators with any different specifications.In order to achieve mass production, in the present invention, a counterweight is attached to the valve so that the center of gravity can be moved in the vertical direction. The problem was solved by this.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view showing one embodiment of the present invention.Since steady operation is mainly carried out at extremely low temperatures, such as in freezers, the thickness of the heat insulating panel, which is a component of the main body, is increased, and as an accessory. A device into which an auxiliary case 20 can be inserted is shown.

FIG. 2 is a sectional view showing the main structure of the present invention.

FIG. 3 shows an embodiment in which a counterweight is attached to the upper surface of the valve.

In the figure, reference numeral 1 denotes a heat insulating panel, and the outer skin is usually made of metal, such as an aluminum alloy plate, and the filler is polyurethane.

Reference numeral 2 denotes a rectangular case which is tightly fitted inside a ventilation hole 3 formed in a part of a heat insulating panel, and is provided with flanges on the inside and outside of the refrigerator to achieve the purpose of airtight installation.

Reference numeral 4 denotes a frame attached to the case 2, and in this embodiment, its cross-sectional shape has a dogleg shape, in other words, the upper half slopes forward and downward toward the outdoor side, and the lower half slopes toward the indoor side. It is equipped with frame boards 4C that are inclined downward in the front and in different directions.

That is, as shown in FIG. 1, the frame is formed by assembling members including a frame plate 4C having a dogleg-shaped cross section and having valve seats 4a and 4b, a mounting surface, and side plates.

Note that 4a is an air supply valve seat, 4b is an exhaust valve seat, and inside the valve seat are an opening 6 and an opening 5.

7 is an exhaust valve hinged on the upper edge of the valve seat 4b, and 8 is an air supply valve hinged on the upper edge of the valve seat 4a.

Reference numeral 9 serves as a cover for the valve mechanism, and an insect-proof net 10 for ventilation is provided in the lower half.

11 is a heater for preventing icing of the valve and the valve seat, 15 is an electric wire, and 16 is a thermostat.

Reference numeral 17 is a mounting seat for frame assembly, and reference numerals 18 and 19 are screw holes and screws.

20 is used as an auxiliary case when the insulation panel is thick.

In FIG. 3, 12 is a threaded guide for moving the counterweight 14 in the vertical direction on the surface of the valve, and 13 is a nut for fixing the guide and the counterweight.

The above-mentioned valve mechanism eliminates the drawbacks of conventional valve opening/closing control based only on the valve's own weight (constant), and by adding counter weight, it is possible to prevent unnecessary opening of the valve and maintain constant pressure. The valve will not operate below the difference.

Also, since the center of gravity of the counter can be moved up and down, it can be used commonly with refrigerators of various specifications.

Also, only the counter can be changed, making it possible to adapt to any usage conditions.

The mounting method of the counter is not limited to this example, but a horizontally long counter with guides provided at the left and right ends of the valve, or a counter rotatably supported at the lower end of the valve and the purpose can be adjusted by rotation. can be accomplished.

In short, it is sufficient if the center of gravity of the counter can be moved in the vertical direction of the non-surface.

This extremely simple invention allows the opening and closing of valves to be controlled with the optimum pressure difference without reducing the cooling efficiency of any large-sized refrigerator or the like.

By providing the valves on the valve seats of the frame that are tilted in different directions, the purpose can be achieved with a lighter counter compared to vertically hanging valves, and the valve mechanism and case can be made smaller. A box-shaped frame board 4C is extremely preferable.

The auxiliary case 20 of the present invention greatly contributes to the fact that it can be used in all refrigerators with various performance specifications having different thicknesses of heat insulation panels.

The skin of the insulation panel is generally made of metal and is a good conductor of heat.The case 2 and cover 9 of this example are made of synthetic resin that does not easily conduct heat.Heat transfer between the left inner panel skin and the outside panel skin It is difficult to do so, and there is no need to take any heat insulation measures during installation.

[Brief explanation of drawings]

Figure 1 is a perspective view of the present invention, Figure 2 is a sectional view of the main part, Figure 3 A is a front view of the valve, and Figure B is a side view. 1...Insulation panel, 2...Case, 4
...Frame, 4a...Air supply valve seat, 4
b...Exhaust valve seat, 4C...Frame board, 7...Exhaust valve, 8...Air supply valve, 9.
...Cover, 12...Guide, 13...
...Fixing nut, 14...Counterweight, 20...Auxiliary case.

Claims (4)

[Scope of utility model registration request] (1) Inside the case 2 installed on a heat insulating panel that is a component of a refrigerator, etc., there is a frame board 4C that slopes in different directions toward the inside and outside of the refrigerator, and there is an air supply valve seat on the top surface of each slope. 4a and an exhaust valve seat 4b, and a counterweight is attached to the surface of the valve which is pivotally supported at the upper edge of the valve seat so that the center of gravity can move in the vertical direction. . (2) Utility Model Registration In the pressure regulating device according to claim (1), the frame plates 4C tilting in different directions form a dogleg-shaped cross section. (3) Utility Model Registration The pressure regulating device according to claim (1) is configured such that an auxiliary case 20 can be inserted and mounted between the case 2 and the valve mechanism cover 9. (4) Utility model registration The pressure regulating device according to claim (3), in which the case 2 and the valve mechanism cover 9 are made of synthetic resin.