JPH02233970A - Refrigerator - Google Patents

Abstract

PURPOSE:To uniformize frosting of a vaporizer and to improve cooling efficiency by a method wherein the upper part of a vaporizer is mounted to the corner part of a cooling chamber, and the lower part thereof is spread in a manner to separate away from a heat insulating wall. CONSTITUTION:Cold air delivered from a cooling fan 17 flows through a louver 22 to the interior of a refrigerating chamber 9. After the cold air cools foods placed on a shelf 10, it is sucked from the lower part of a partition wall A20. After the cold air flows through a space part between a drain pan 26 and a lower part 18 of a heat insulating wall 24, it flows through a spreading- toward-end type space 27 between a vaporizer 15 and a side part 19 of the heat insulating wall 24. Since, as noted above, the spreading-toward-end type space 27 in which a portion between the lower part of the vaporizer 15 and the side part 19 of the heat insulating wall 24 is spread is formed, the flow of the cold air is smoothed and uniformization of frosting prevents the occurrence of partial choking and improves cooling efficiency. Besides, since the cooling fan 17 is mounted above the vaporizer 15, the space of a cooling chamber 14 can be utilized effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the arrangement of an evaporator and air passage configuration for cooling a refrigerator compartment.

BACKGROUND OF THE INVENTION In recent years, as a configuration for cooling the refrigerating compartment of a refrigerator, an indirect cooling method in which cold air is circulated using an evaporator and a blower fan is often used because it does not require defrosting by the user.

Referring to the drawings below, an example of the cooling and air passage configuration of a conventional refrigerator will be described in Fig. 2. This will be explained using FIGS. 3 and 4.

Reference numeral 1 is an under-counter type refrigerator used in cooking areas such as restaurants, and the main body is housed in an oblong insulating box 3 having a plurality of refrigerator compartment doors 2a, 2b, and 2C each made of an insulating material at the front opening. The compressor 4 is installed on the left side of the main body.
A machine room 7 is formed in which the condenser fan 6 and the condenser 6 are housed.

Reference numeral 8 denotes a heat insulating wall made up of an outer box 8a, an inner box 8b made of synthetic resin, and a foamed heat insulating material 8C filled between the boxes sa and ab, and a refrigerator compartment 9 for cooling food to keep it fresh.
It consists of The refrigerator compartment 9 is provided with a shelf 1o on which food can be placed.

Reference numeral 12 denotes a heat insulating wall provided in the upper part of the machine room 7, and is press-inserted into the side opening 13 of the heat insulating wall 8. The heat insulating wall 12 constitutes a cooling chamber 14 for generating cold air.

The cooling chamber 14 is equipped with an evaporator 16, a drain pan 1e for receiving drain water exposed from the evaporator 16, and a cooling fan 17 for blowing cold air cooled by the evaporator 15. Then, the drain pan 16 and the lower part 1 of the sub-insulating wall 12 are installed so that the air introduced into the evaporator 15 flows smoothly.
A certain space is provided between the evaporator 8, the evaporator 16, and the side surface 19 of the heat insulating wall 12.

Reference numeral 20 denotes a partition wall A which is fixed to the drain pan 16 and serves to introduce the relatively warm cold air from the bottom of the refrigerator compartment 9 to prevent a short circuit with the discharged air.

Further, both side surfaces of the evaporator 16 are fixed so as to be sealed with the partition wall B21, and are also fixed so as to be sealed with the drain pan 16. Furthermore, the partition wall B21 is
The partition wall A20 is also sealed and fixed, and the cooling fan 1
7. The evaporator 16 is a louver for sending the air through the fan 17, and serves to cause the cold air discharged from the cooling fan 17 to flow down in a laminar manner.

Reference numeral 23 denotes a drain hole, which is used to guide drain water flowing out from the drain pan 16 to the outside of the heat insulating wall 12.

Problems to be Solved by the Invention However, in the above configuration, the evaporator 15 of the cooling chamber 14 and the cooling fan 17 must be provided in parallel, so the width of the cooling chamber 14 becomes large and the main body of the refrigerator 1 must be increased, and the effective internal volume efficiency of the refrigerator compartment 9 (
effective internal volume/total volume) had decreased. Furthermore, various attempts have been made to narrow the distance between the right side portion 19 of the heat insulating wall 12 and the evaporator 15 and the distance between the cooling fan 17 and the evaporator 16 in order to increase the effective internal volume efficiency. The problem is that the flow of air is disturbed, and the cold air flows only in the lower part of the evaporator 16, resulting in uneven frost formation and poor cooling efficiency.

In view of the above problems, the present invention is capable of increasing the effective internal volume efficiency and also increasing the cooling efficiency.

Means for Solving the Problems In order to solve the above problems, the technical means of the present invention is such that the upper part of the evaporator is provided at a corner of the cooling chamber, and the lower part is widened away from the heat insulating wall.

Effects According to the present invention, with the above-described configuration, the suction air from the refrigerator compartment flows uniformly to the suction side of the evaporator, thereby making it possible to uniformize frost formation in the evaporator and improve cooling efficiency.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Components that are the same as those in the conventional example are designated by the same numbers and detailed explanations will be omitted. FIG. 1 is a sectional view of a refrigerator main body according to an embodiment of the present invention.

In the figure, reference numeral 24 denotes a heat insulating wall cut with an upper corner portion 25 inclined, and is provided so that the upper part of the evaporator 16 is in close contact with the wall. The drain pan 26 is configured to be in close contact with the lower part of the evaporator 15, and is sealed and fixed to the partition wall A20. The lower part of the evaporator 15 is a heat insulating wall 24.
A wide-end space 27 is provided by sloping them apart. Further, the cooling fan 17 is provided above the center of the evaporator 16.

The operation of the refrigerator configured as above will be explained below.

First, the cold air discharged from the cooling fan 17 flows into the refrigerator compartment 9 via the I lever 22, cools the food (not shown) placed on the upper part of the shelf 10, and then flows from the lower part of the partition wall A20. After being sucked in and flowing through the space between the drain pan 26 and the lower part 18 of the heat insulating wall 24, it flows through the widening space 27 between the evaporator 16 and the side surface 19 of the heat insulating wall 24. After flowing evenly through the suction side of the evaporator 15, the air returns to the cooling fan 17, forming a cycle.

As described above, according to this embodiment, since the widening space 27 is provided between the lower part of the evaporator 15 and the side surface 19 of the heat insulating wall 24, cool air can flow smoothly. Uniform frosting not only prevents local clogging and improves cooling efficiency, but also allows the cooling fan 17 to be installed above the evaporator 16, making effective use of the space in the cooling chamber 14.

Effects of the Invention As described above, the present invention has a structure in which the upper part of the evaporator is provided at the corner part of the heat insulating wall constituting the cooling chamber, the lower part of the evaporator is kept away from the heat insulating wall, and the side part of the heat insulating wall and the evaporator are separated from each other. Since the configuration has a wide-spread space between the evaporator and the evaporator, the cold air flowing through the evaporator flows smoothly and uniform frost formation prevents local clogging. FIG. 4 is a sectional view taken along line A-A/ in FIG. 3.

1... Refrigerator, 2... Door, 8...
...insulation wall, 9...refrigeration room, 14...
Cooling room, 16...Evaporator, 17...Cooling fan, 19...Side part of insulation wall, 2Q...
...Partition wall A521...Partition wall B124.
...Insulation wall, 25 ... Corner part, 28.
...Drain pan, 27... Suehiro type space.

Name of agent: Patent attorney Shigetaka Awano and one other person can be used effectively, increasing effective internal volume efficiency.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a refrigerator main body according to an embodiment of the present invention;
The figure is a perspective view of a conventional refrigerator body.

Claims (1)

[Claims] It consists of a refrigerating room and a cooling room each having a heat insulating wall, and inside the cooling room there is an evaporator, a cooling fan installed in parallel with the evaporator, partition walls provided on both sides of the evaporator, and a lower part of the cooling room. and a partition wall provided around the cooling fan, the upper part of the evaporator is located at a corner of the insulating wall, the lower part of the evaporator is located away from a side part of the insulating wall, and the A refrigerator characterized in that the evaporator is inclined, a widening space is provided between the heat insulating wall and the evaporator, and the cooling fan is provided above the center of the evaporator.