JPS6342296Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to drain pipes for freezers, refrigerators, etc., and is designed to prevent air from flowing into the refrigerator from outside the refrigerator through the drain pipe after the cooling operation starts when no liquid pools have formed. The purpose is to prevent

This type of conventional drain pipe has a liquid pool part b in the middle of the drain pipe a, as shown in Fig. 3, and only when the liquid c such as defrosting water accumulates in this liquid pool part b does it flow from outside the refrigerator to the inside of the refrigerator. The air flow was immediately cut off. Therefore, by starting the cooling operation and defrosting after a predetermined period of time, the defrost water flows into the liquid pool part b.
Until the inflow of air is stopped, the humid air outside the refrigerator freely flows into the cooling chamber through the drain pipe a and forms frost on the surfaces of the evaporator and fan. As a result, there is a drawback that there is a risk of a decrease in cooling performance and a fan lock in the early stage of cooling operation.

The present invention solves the above-mentioned drawbacks of the conventional drain pipe by inserting a water-soluble blocker downstream of the liquid pool provided in the middle of the drain pipe.

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 is an inner box, 2 is a heat insulating material, 3 is an outer box, and 4 is a drain pipe for draining defrosting water, etc. to the outside of the refrigerator, and a U-shaped liquid pool portion 4a is formed in the middle. Numeral 5 is a water-soluble blocker made of water-soluble pulp balls, soap, etc., which is inserted through the lower hole after the drain pipe 4 is assembled and fixed by friction with the inner wall of the drain pipe, and is dissolved by drainage. It can leak out.

In the above configuration, since the drain pipe 4 is closed with the water-soluble blocker 5 even immediately after the start of the initial cooling operation, humid air from outside the refrigerator is sucked into the refrigerator through the drain pipe 4. There isn't. As the operation continues, the defrost is repeated and the defrost water c accumulates in the liquid pool 4a of the drain pipe 4. When the water level exceeds the plane p, the defrost water dissolves the water-soluble blocker 5 and flows out of the refrigerator. After that, the state of the conventional example shown in FIG. 3 is reached.

Therefore, after the initial cooling operation starts, the water-soluble blocker prevents the inflow of humid air from outside the refrigerator from the drain pipe even while the defrost water accumulates.

As is clear from the above explanation, the drain pipe of the present invention has a U-shaped liquid pool part in the middle thereof, and a water-soluble blocker that can flow out by drainage is inserted into the downstream drain pipe. This prevents humid air from outside the refrigerator from flowing into the refrigerator through the drain pipe immediately after the initial cooling operation starts, reduces frost formation on the evaporator and fan surfaces, and reduces cooling performance due to frost formation immediately after the start of operation. This has the effect of eliminating the drawback of the danger of fan lock.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a freezer employing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the drain pipe portion, and FIG. 3 is a sectional view of a conventional example. 4...Drain pipe, 4a...Liquid pool, 5...Water-soluble blocker.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A U-shaped liquid pool is provided in the middle of the drain pipe, and within the drain pipe downstream from this liquid pool,
Drain pipes of freezers, etc. equipped with water-soluble blockers that can drain out. (2) A drain pipe for a freezer or the like as set forth in claim 1 of the utility model registration claim, in which the water-soluble blocker is a water-soluble substance such as soap. (3) A drain pipe for a freezer or the like according to claim 1, wherein the water-soluble plug is a water-soluble pulp sphere.