JPH0245745Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a refrigerator in which a freezer compartment cooler for indirect cooling and a direct cooling cooler for direct cooling are arranged in the freezer compartment of the refrigerator main body.

[Technical background of the invention]

In conventional refrigerators of this type, a fan device is used to discharge cold air from the freezer compartment cooler to the surface of the direct cooling cooler, and then return the cold air in the freezer compartment to the freezer cooler. It is common to have a configuration in which it circulates.

[Problems with background technology]

According to the above conventional configuration, even if frost adheres to the surface of the direct cooling cooler, the frost is transferred to the freezer compartment cooler by the sublimation effect of the cold air circulation by the fan device, and the frost is transferred to the freezer compartment cooler. As a result, frost does not form on the front surface, but there is almost no cooling circulation on the back surface of the direct cooling cooler, so there is a problem that a considerable amount of frost forms.

[Purpose of invention]

The present invention aims to provide a refrigerator that can prevent frost from forming on the back side of a direct cooling cooler and improve the cooling efficiency of the direct cooling cooler.

[Summary of the idea]

In the present invention, a cover having a blow-off hole is provided in the freezer compartment so as to form a ventilation duct with the back side of the direct cooling cooler, and a part of the cold air from the freezer compartment cooler is passed through the fan. By supplying cold air into the ventilation duct by the action of the device, the sublimation action due to cold air circulation is prevented from occurring even on the back side of the direct cooling cooler.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a refrigerator body having heat insulating properties, and this is achieved by foaming and solidifying a foamable heat insulating material 5 such as foamable urethane between an outer box 2, an inner box 3 for the freezer compartment, and an inner box 4 for the refrigerator compartment. The freezer compartment inner box 3 is filled with a freezer compartment 6, and the freezer compartment inner box 4 is a refrigerator compartment 7. Reference numeral 8 denotes a vertical partition plate disposed deep inside the freezer compartment 6, which is connected to the inner box 3 for the freezer compartment.
A cooler duct 9 is formed by the back plate. A freezer compartment cooler 10 is disposed within the cooler duct 9, and a fan device 11 is disposed above the freezer compartment cooler 10.
is arranged to face an air supply port 8a formed at the top of the vertical partition plate 8. 12 is the freezer compartment 6
This is a horizontal partition plate disposed at the bottom of the inner box 3 for the freezer compartment, which serves as an air intake path communicating with the lower part of the cooler duct through the bottom plate of the inner box 3 for the freezer compartment.
3, and a ventilation hole 12a is formed at the front end thereof. Reference numeral 14 denotes a louver disposed in the freezer compartment 6 so as to correspond to the upper part of the vertical partition plate 8, and a ventilation hole 14a facing the air supply port 8a and facing diagonally downward to the front side is provided in the upper part of the louver. A communication port 14b is formed in the lower part, and a ventilation hole 14c is formed in the inclined lower end. 15 is a pipe-on-sheet type direct cooling cooler having a flat plate shape with a refrigerant pipe 15a on the lower surface, and 16 is a flat hollow rectangular cover, the lower end of which is oriented diagonally downward on the front side. A blowout hole 16a is formed therein. The direct cooling cooler 15 is disposed approximately horizontally and is fitted onto the cover 16 so as to form an upper surface thereof to form a ventilation duct 17 together with the cover 16. is attached to the louver 14 so that its right open end communicates with the communication port 14b of the louver 4, and the area above the direct cooling cooler 15 serves as a direct cooling chamber 18. 19 is direct cooling room 18
This is a lid pivotably installed in the front opening of the lid so as to be pivotable in the vertical direction, and a ventilation hole 19a is formed in this lid. In addition, 20 is a refrigerator compartment cooler disposed in the upper part of the refrigerator compartment 7, and 21 is this refrigerator compartment cooler 2.
0, a water receiving gutter 22 is a drain pipe that connects the drain gutter 23 formed at the rear end of the bottom plate of the inner box 3 for the freezer to the upper part of the refrigerator compartment 7;
Reference numerals 4 and 25 denote doors that are pivotally installed at the openings on the entire surface of the freezer compartment 6 and the refrigerator compartment 7, respectively.

Next, the operation of this embodiment will be explained. When the compressor and fan device 11 (not shown) is operated, the refrigerant is supplied to the direct cooling cooler 15, the refrigerator cooler 20, and the freezer cooler 10 in this order, and the fan device 11 acts to cool the refrigerator. The cold air from the room cooler 10 flows from the cooler duct 9 through the air supply port 8a and the ventilation hole 14a to the direct cooling room 18.
It is supplied into the ventilation duct 17 through the communication port 14b, and is also supplied into the ventilation duct 17 through the ventilation hole 14c.
is supplied into the freezing compartment 6 via the cooling compartment 1.
The cold air supplied into the freezer compartment 8 is supplied into the freezer compartment 6 through the ventilation hole 19a, and is also supplied into the freezer compartment 6 through the ventilation duct 17.
The cold air supplied into the freezer compartment 6 is blown out through the blow-off hole 16a, and the cold air thus supplied into the freezer compartment 6 passes through the ventilation hole 12a and the intake duct 13 in this order to the cooler duct. It is circulated so that it may be returned to the freezer compartment cooler 10 in 9. In this case, the evaporation temperature of the direct cooling cooler 15 is slightly higher than that of the freezer compartment cooler 10 (for example, 2 to 7°C).
It is set to be higher than that. like this,
Due to the circulation of cold air by the fan device 11, frost forms on the freezer compartment cooler 10.
For example, if frost forms on the top and back surfaces of the direct cooling cooler 15, the frost on the top surface will be sublimated by the circulation of cold air supplied into the direct cooling chamber 18 from the ventilation holes 14a. Therefore, the frost on the back surface is removed by the sublimation effect caused by the circulation of cold air supplied into the ventilation duct 17 from the communication port 14b, and the frost is removed from the freezer compartment cooler 1.
Therefore, concentrated frost formation is performed only on the freezer compartment cooler 10. On the other hand, when defrosting the freezer compartment cooler 10, the refrigerant is supplied to the direct cooling cooler 15, but the refrigerant that has passed through the direct cooling cooler 15 is used in the refrigerator compartment cooler 20 and the freezer compartment. These are not supplied through the cooler 10, and the freezer compartment cooler 10 is heated and defrosted by a defrosting heater (not shown). Thereby, even during defrosting of the freezer compartment cooler 10, the freezing compartment 6 and the direct cooling compartment 18 are cooled by the direct cooling cooler 15, and a rise in temperature is prevented.

As described above, according to this embodiment, the cover 16 which forms the intake duct 17 with the back surface of the flat direct cooling cooler 15 arranged substantially horizontally is arranged in the freezer compartment 6. After the cold air is supplied from the freezer compartment cooler 10 into this intake duct 17, it is blown out from the blow-off hole 16a into the freezer compartment 6. As a result, cold air is circulated to sublimate the frost, and as a result, frost can be prevented from forming on the back side of the direct cooling cooler 15, and cooling efficiency can be improved. can be achieved.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with appropriate modifications within the scope of the gist.

[Effects of the invention] As explained above, the present invention provides a direct cooling cooler installed in the freezer compartment in addition to a freezer compartment cooler for indirect cooling installed in the cooler duct. This has the practical effect of being able to prevent frost from forming on the back side of the container and improving cooling efficiency.

[Brief explanation of the drawing]

The figure is a longitudinal cross-sectional side view of the upper half of an embodiment of the present invention. In the figure, 1 is the refrigerator body, 6 is the freezer compartment, 7 is the refrigerator compartment, 8 is the vertical partition plate, 8a is the air inlet, 9 is the cooler duct, 10 is the cooler for the freezer compartment, 11 is the fan device, 12 is a horizontal partition plate, 13 is an intake duct (intake path), 14 is a louver, 15 is a direct cooling cooler, 16
is a cover, 16a is an air outlet, 17 is a ventilation duct,
18 is a direct cooling room, and 20 is a refrigerator compartment cooler.

Claims (1)

[Scope of utility model registration request] a refrigerator body having at least a freezer compartment therein; a cooler duct formed in the freezer compartment of the refrigerator body and having an air supply port at the top; a freezer compartment cooler disposed within the cooler duct; A direct cooling cooler having a flat plate shape arranged approximately horizontally in the freezing chamber, and an air outlet facing into the freezing chamber arranged so as to form a ventilation duct with the back side of the direct cooling cooler. a cover having a hole; an air intake path that communicates the freezer compartment with a lower part of the cooler duct; and a cover that directs cold air from the freezer compartment cooler to the direct cooling cooler through an air supply port of the cooler duct. A refrigerator comprising: a fan device that circulates cold air inside the freezer compartment so as to circulate the cool air in the direction of the upper surface and into the ventilation duct, and then return it into the cooler duct via the air intake path.