JPS61282773A - 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 [Field of Application of the Invention] The present invention relates to a refrigerator, and particularly to a refrigerator suitable for rapidly freezing food.

[Background of the invention]

Conventionally, some refrigerators use an auxiliary cooler as described in JP-A-57-182066 in conjunction with contact heat transfer with the food in order to quickly freeze the food. However, since foods come in various shapes, if the contact area with the auxiliary cooler is small, the freezing time may not be shortened.

To solve this problem, it is necessary to increase the air flow to foods that require rapid freezing, and to improve the heat transfer performance between the food surface and the air. However, in order to increase the total air volume of the refrigerator, the air blowing capacity of the air blower must be increased, which has the disadvantage of increasing the air blowing capacity (which in turn increases noise accordingly).

Further, a conventional general refrigerator having a freezing promotion chamber will be explained with reference to FIGS. 6 to 9. In the figure, 1 is the refrigerator main body. 2 is an outer box, 3 is an inner box, and the gap is filled with a foamed heat insulating material 4 or the like to form a heat insulating box. 5 is a freezer compartment, and 6 is a refrigerator compartment, each of which is divided by a heat insulating partition wall 7. Reference numeral 8 denotes a cooler, which is installed on the back side of the freezer compartment 5.

This cooler 8 forms part of a series of refrigeration cycles and serves as a cold air supply source to the freezer compartment 5 and the refrigerator compartment 6. Reference numeral 9 denotes an air blower, which is located at the center of the upper part of the cooler 8 and forcibly circulates cold air generated in the cooler 8 to the freezer compartment 5 and the refrigerator compartment 6. This blower device 9 includes a fan 9a and a drive motor 9b.
It is composed of. 10 is a plate provided with a mouth ring 11, which covers the cooler 8. The fan 9a is located in the mouse ring 11. Reference numeral 12 denotes a cold air fan guard having a cold air outlet, which is provided on the front surface of the plate 10. 13 is a freezing promotion chamber or corner (hereinafter referred to as a freezing chamber), and a synthetic resin case 13a
1 cover 13b and the like, and is installed in front of the cold air outlet of the fan guard 12 in the freezer compartment 5. 13
C is a cold air outlet.

Referring to FIG. 8, the fan guard 12 will be explained in detail. Reference numeral 12a denotes cold air discharge ports of the freezer compartment 5, which are arranged at several locations so that the temperature distribution within the freezer compartment 5 is uniform. 12b is a cold air outlet for supplying cold air to the freezing chamber 13. This cold air discharge port 12b has a larger opening area than the other cold air discharge ports 12a in order to promote heat transfer performance with food. 12C is a rectifying member, which serves as a cold air discharge port 12.
b is divided into a plurality of parts in the vertical direction.

The cold air generated in the cooler 8 is sent out by the fan 9a as shown by the arrow in FIG.
, 12b to the freezer compartment 5 for the intended purpose of cooling the interior.

However, if the wind velocity distribution in the freezing chamber of a refrigerator having such a structure is measured at the position B--B in FIG. 7, the temperature distribution will be non-uniform as shown in FIG. 9.

The reason for this is that the velocity component of the cold air at the cold air outlet of the freezing chamber is directed in an oblique direction due to the cold air passage between the mouth ring plate and the rectifying plate, and the centrifugal force thereof. In this way, in the conventional rectifying member, cold air flows inside the freezing chamber while having velocity components in the same direction.

That is, since the wind speed at the side walls of the freezer compartment is high, and the wind speed at the central position, where food is generally placed, is low, there is little improvement in heat transfer performance, which is disadvantageous for rapid freezing.

[Purpose of the invention]

An object of the present invention is to provide a cold air baffle plate for a refrigerator that is effective in shortening the freezing time of food.

[Summary of the invention]

In order to achieve this object, the present invention is characterized in that a cold air baffle plate is provided on the cold air discharge convex at an angle facing toward the cold air.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Note that the same numbers as those of the conventional example indicate the same or equivalent items.

Fig. 1 is a sectional view of the main parts of the refrigerator, Fig. 2 is a front view of the cold air rectifier, and Fig. 3 shows the shape of the cold air outlet.

In the figure, reference numeral 14 denotes a cold air baffle plate, which is made of synthetic resin and installed on the front surface of a plate 10 on which a mouth ring 11 is provided. Reference numeral 14a denotes cold air discharge ports of the freezer compartment 5, which are arranged at several locations so that the temperature distribution within the freezer compartment 5 is uniform. Reference numeral 15 denotes a cold air discharge port for supplying cold air to the freezing chamber 13, and the shape is larger than the other cold air discharge ports 1-48 in order to promote heat transfer performance with food.

Reference numeral 16 denotes a rectifying plate, on which a plurality of cold air discharge ports 15 are installed in the left and right direction. The lengths of the plurality of rectifying plates 16 in the cold air traveling direction (in the direction of the arrows in FIGS. 1 and 3) are different. The longest rectifier plate 16 is placed farthest from the fan 9a. As shown in FIG. 3, the plurality of rectifying plates 16 are provided so as to block the cold air in the direction of movement of the cold air.

Note that the cross-sectional shape of the rectifying member 16 may be a curved shape as shown in FIG. 4, as long as it has a surface facing the cold air in an oblique direction (arrow in the figure) and that a uniform velocity distribution can be obtained at the cold air discharge port 15. . Reference numeral 16a denotes an auxiliary rectifying member, which is formed to protrude in front of the cold air discharge port 15 and narrow the opening area.

A refrigerator equipped with such a cold air rectifying plate 14 includes a rectifying member 16 and an auxiliary rectifying member 16a that are shaped to concentrate the cold air in the center of the freezing chamber 13 against the diagonal progress of the cold air through the cold air outlet 15. As shown in FIG. 5, the cold air can be rectified into a stable wind speed distribution. Therefore, heat transfer performance can be improved for foods of various shapes.

〔Effect of the invention〕

As explained above, the present invention can uniformize the cold air flow velocity distribution in the freezing chamber, improve the heat transfer performance with the food, and shorten the freezing time. Furthermore, since no auxiliary cooler is used or the capacity of the blower is increased, space and resource savings can be achieved, and a low-noise refrigerator can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a refrigerator showing one embodiment of the present invention, FIG. 2 is a front view of a cold air rectifying plate of the present invention, and FIG.
FIG. 4 is a cross-sectional view of a main part of a cold air baffle plate showing a second embodiment of the present invention, and FIG. 5 is a diagram illustrating the flow velocity distribution of cold air. , Fig. 6 and Fig. 7 are a front view and a cross-sectional view of a conventional refrigerator, Fig. 8 is a front view of a conventional cold air baffle plate, and Fig. 9 is a flow velocity distribution of cold air at the position B-B in Fig. 7. FIG. 1... Refrigerator body, 2... Outer box, 3... Inner box, 4
... Foaming heat insulating material, 5... Freezer room, 6... Refrigerator room, 7... Heat insulation partition, 8... Cooler, 9... Air blower, 9a... Fan, 9b ... Drive motor, 10.
... Plate, 11... Mouth ring, 12... Cold air rectifying plate, 12a... Cold air outlet, 12b... Cold air outlet, 12c... Rectifying member, 13... Freezing chamber, 1
3 a...Case, 13b...Cover, 13G...
-Cold air outlet, 14... Cold air rectifying plate, 14a... Cold air discharge port, 15... Cold air discharge port, 16... Rectifying member, 16a... Auxiliary rectifying member. $6＄＄7圀184゜−1t

Claims (1)

[Claims] 1. A fan for blowing cold air attached to the back side of the freezer compartment, a fan guard attached to the front side of the fan, a cold air outlet provided in the fan guard, and the above-mentioned A refrigerator comprising a cold air baffle plate provided at the cold air outlet so as to block the cold air from the fan. 2. The refrigerator according to claim 1, characterized in that a plurality of said rectifying plates are provided. 3. The refrigerator according to claims 1 and 2, wherein the rectifier plate located farthest from the fan is longest in the cold air traveling direction.