JPH01127880A - Refrigerator - Google Patents

Abstract

PURPOSE: To ensure sufficient freezing capacity in a switching room by taking a part of chill directed from a fan to the delivery air path to a freezing room into the delivery air path to the switching room through a projecting part and introducing a part of chill flowing into the delivery air path to a refrigerating room into the delivery air path to the switching room through a throttling section thereby ensuring a significant quantity of chill. CONSTITUTION: When a switch 63 is operated, a microcomputer 62 opens a damper 26 continuously and switches a switching room 4 to be used in freezing temperature zone. Chill cooled by a chiller 14 is sucked through rotation of a tan F and deflected ire up/down direction by the inclination of a heat insulating cover 19. The leeward shunt flow speed of a chill flowing toward a delivery air passage 18 is higher than that of a chill flowing toward a delivery air passage 17. A protrusion 65 takes in a part of chill flowing toward a delivery air passage 16 to the air passage 18 side and a throttle section 67 directs a part of chill flowing toward the air passage 17 to the air passage 18. Consequently, the quantity of chill being supplied from an outlet 21 to the switching room 4 increases thus ensuring a desired quantity of chill.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerator equipped with a freezing chamber, a refrigerating chamber, and a switching chamber that can be switched to a freezing or higher temperature range.

(b) Conventional technology Conventionally, in this type of refrigerator, for example,
As disclosed in Publication No. 463, with the diversification of foods to be stored, a freezer compartment for storing frozen foods and a refrigerating compartment for storing refrigerated foods are divided into compartments, and the storage temperature is set to freezing or higher temperature, for example, the ice temperature storage temperature described below. It is constructed with a switching chamber that can be switched between cold and refrigeration temperatures to accommodate changes in the amount of each type of food.

(c) Problems to be solved by the invention The structure of the above-mentioned publication is that a part of the cold air from the refrigeration duct is always guided through a communication duct to the vegetable compartment, which serves as a switching compartment, and when used as a freezing compartment, it is switched to the freezing compartment. However, if the switching room is set to a freezing temperature, a considerable amount of air volume is required compared to when it is used as a vegetable compartment. There was a problem in that the air volume was unevenly distributed in the refrigeration duct to the room (for example, 70% of the total), and the divided air volume to the refrigeration switching duct was insufficient, making it impossible to obtain the desired refrigeration temperature.

The present invention aims to solve such problems.

B) Means for Solving the Problems The present invention provides a partition wall housing a cooler, a freezer compartment formed above the partition wall, a refrigerator compartment formed below the partition wall, and a refrigerator or cooler. It has a switching room that can switch to a high temperature range, a cold air suction type blower installed at the rear of the cooler, and a blower room that houses the fan. communicates with the blower room and has a discharge air passage to the freezer compartment above, a discharge air passage to the refrigerator compartment on the windward side with respect to the rotating direction of the blower, and a discharge air passage to the switching room on the leeward side below. Additionally, a protruding portion located above the horizontal center line of the blower and protruding above the discharge air passage to the switching chamber, and a throttle portion narrowing the entrance of the discharge air passage to the refrigerator compartment are provided.

(E) Function According to the present invention, a part of the cold air blown out from the blower and directed toward the discharge air path to the freezer compartment is taken into the discharge air path to the switching chamber, and is about to flow into the discharge air path to the refrigerator compartment. A portion of the cold air is guided to the discharge air path to the switching chamber to increase the air volume.

(f) Example The invention will now be explained in detail with reference to the drawings.

Figure 1 shows a perspective view of the duct (D), Figure 2 shows a schematic longitudinal sectional view of the refrigerator (1), and Figure 3 shows a damper cover (2).
), Figure 4 is a front view of the upper part of the switching chamber (4) excluding the refrigerator compartment (10) and damper cover (2), and Figure 5 is a front view of the front insulation board (6). Excluding damper cover (2
) are each shown in front view.

In FIG. 2, (7) is a heat insulating box body that opens at the front, and (8) is a heat insulating partition wall that partitions the inside of the refrigerator, and a freezer compartment (3) is formed above it. The interior space below the partition wall (8) is further divided into upper and lower sections by a heat-insulating partition plate (9).
The lower part is a refrigerating room (10), and the switching room (4) has a transparent inner door (11) between the partition plate (9) and the partition wall (8).
). A cooling chamber (12) is formed within the partition wall 8), and a cooler (14) included in the refrigeration cycle is installed here.
is stored and arranged. A duct (D) is attached to the inner box (1) at the rear of the cooler (14).The duct (D) has a blower room (15) connected thereto and a corresponding blower room located immediately behind the cooling room (12). A motor housing part (15A) which is integrally molded and projects rearward, a discharge air passage (16) to the upper freezer compartment (3), and discharge to the lower refrigerator compartment (10) and switching compartment (4). They have air passages (17) and (18), respectively.In the blower room (15), a blower (F) consisting of a cold air suction type propeller fan that rotates clockwise in Fig. 1 is disposed. The motor (FM) that drives this can be stored in the motor storage part (15A).

This motor storage chamber (15A) is closed by a heat insulating cover (19) having an inclined surface so as to gradually widen toward the rear.

The blower (F) rotates and sends cold air from the cooler (14) to the discharge air passages (16), (17) and (18),
It is discharged into the freezer compartment (3) through the discharge port (13). The discharge air passages (17) and (18) are connected to the inner box (I) behind the switching chamber (4).
), six damper covers (2) each opening at the discharge ports (20) and (21) are attached to cover the discharge ports (20) and (21) at the back of the switching chamber (4).

The damper cover (2) has a front insulation board (6) and a rear insulation board (2).
2> is polymerized. The rear insulation board (22) has through holes (23) corresponding to the discharge ports (20) and (21).
, (24), and further a through hole (23),
Motor-driven damper (25) that opens and closes (24)
, (26) are built in parallel on the left and right. Front insulation board (
6) is a damper formed by recessing forward from the rear surface (25) and (26), respectively, and a space (30) for operation.
, (31) and a duct (32>), the duct (32) communicates with the upper part of the space (30) and extends downward between the spaces (30) and (31), with the lower part connecting the left and right sides. The air outlet expands to (33), (33), (34)
, (34) opens downward. Also, space (3
1) is opened forward from the upper discharge port (35).

A sensor (41) for detecting the temperature of the switching chamber (4) is provided on the front surface of the front heat insulation plate (6), and a groove (42) for holding the rear end of the partition plate (9) has been formed. .

(50) is a sensor that detects the temperature of the freezer compartment (3), and (51) is a sensor that detects the temperature of the refrigerator compartment (10). We are trying to shorten the length. Also, the air outlet (33), (33
) are located on the left and right sides to improve the circulation of cold air in the refrigerator compartment (10), but in this case, the temperature change around the sensor (51) lags behind the other parts, so the air outlet ( 34) and (34) are located directly above the sensor (51>).The partition plate (9) is supported and attached to the damper cover (2) and the front partition member (53).The discharge ports (13) and (35) ) and are discharged from the freezer compartment (
3) and the cold air that circulated in the switching room (4) is passed through the partition wall (8).
The cold air returned to the cooling compartment (12) through the suction holes (54) and (55) provided at the front and circulated within the refrigerator compartment (10) is passed through the suction hole (56) formed at the front upper part of the refrigerator compartment (10). From there, it passes through a passage (57) formed in the side wall of the heat insulating box (7) and returns to the cooling chamber (12). (58), (59)
, (60) is for each room (3), (4), (to)
(61) is a compressor of the refrigeration cycle.

FIG. 6 shows a block diagram of the control circuit of the refrigerator (1).

(62) is a well-known microcomputer, into which the outputs of the sensors (50), (41), and (51) are input. (63) is a changeover switch, and the insulation door (58
) is provided on the front control panel (P), and the output of the selector switch (63) is connected to the microcomputer (62).
is input. The microcomputer (62) controls the compressor (61) and blower (61) based on the output of the sensor (50).
Each motor (61M>, (FM) of F) is controlled to maintain an average temperature of, for example, -20°C in the freezer compartment (3).Also, when the changeover switch (63) is not operated, the sensor (4
By controlling the motor (26H) for driving the damper (26) based on the output of step 1) and opening and closing the damper (26), the temperature of the switching chamber (4) is reduced to an average ice temperature storage temperature of -1°C. shall be.

Here, freezing temperature storage temperature is a temperature range of 0℃ to -3℃, which is below the freezing point but just before meat and vegetables freeze. By storing food at this freezing temperature storage temperature, it can be prevented from freezing. It suppresses the growth of bacteria inside and can be stored for a relatively long period of time (about a week in experiments).

The microcomputer (62) further includes a sensor (51).
) is used to drive the damper (25) based on the output of the motor (
25M) and open and close the damper (25) to make the inside of the refrigerator compartment (10), for example, at an average temperature of +5°C.

In addition, the microcomputer (62) has a changeover switch (6
When 3) is operated, the damper (26) is kept open and the switching chamber <4> is switched so that it can be used in the freezing temperature range.

On the other hand, the duct (D) has a discharge air passage 16) to the freezer compartment (3) above, and discharge air passages (17) and (18) to the refrigerator compartment (10) and the switching room (4) below. However, the arrangement of the discharge air passage (17) and the discharge air passage (18) is such that the discharge air passage (17) to the refrigerator compartment (10) is on the windward side with respect to the rotation direction of the blower (F). A discharge air passage (18) to the switching chamber (4) is arranged on the leeward side. Further, a protrusion (65) is formed above the horizontal center line (64) of the blower (F) to protrude upward from the discharge air passage (18) to the switching chamber (4), and a protrusion (65) is formed above the horizontal center line (64) of the blower (F). Inlet (66) of discharge air passage (17) to
A constriction part (67) is formed that projects from the discharge air passage (18) side to narrow the inlet (66), and a discharge air passage (17) is formed above the horizontal center v;A (64). A protrusion (68) is formed that protrudes upward.

With the above configuration, the cold air cooled by the cooler (14) is sucked in by the rotation of the blower (F) and moved to the heat insulating cover (19).
The direction is changed vertically by the inclination of the At this time, the cool air heading toward the discharge air path (18) has a higher branching speed on the lee side than the cold air flowing toward the discharge air path (17). Further, the protrusion (65) takes in a part of the cold air heading towards the discharge air passage (16) into the discharge air passage (18), and the constriction part (67) takes in part of the cold air heading towards the discharge air passage (17). The section is directed toward the discharge air path (18). As a result, the discharge port (2) to the switching chamber (4)
1) The amount of cold air supplied increases and the desired amount is secured. Therefore, operate the changeover switch (63) and change the changeover chamber (
Even when 4) is used as the freezing temperature range, insufficient cooling does not occur and a sufficient freezing temperature can be obtained.

Note that the protrusion (68) takes in a part of the cold air heading toward the discharge air passage (16) into the discharge air passage (17), so the discharge port (20)
The amount of cold air supplied from the refrigerator to the refrigerator compartment (10) is also ensured.

As a result, each discharge air path (16), (17) and (
18) The ratio of the amount of cold air that can be distributed is approximately 10:2.5
: It will be about 6.

(G) Effects of the Invention According to the present invention, a part of the cold air blown out from the blower and directed toward the discharge air passage to the freezer compartment is taken into the discharge air passage to the switching chamber by the protrusion, and the discharge air to the refrigerator compartment is taken in by the protruding portion. A portion of the cold air that is about to flow into the switching chamber is also guided to the discharge air path to the switching chamber by the constriction part, so a considerable amount of cold air that should be supplied to the switching chamber can be secured.
Sufficient refrigeration capacity can be ensured even when used in a freezing temperature range.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention. Figure 1 is a perspective view of a duct, Figure 2 is a vertical sectional view of the refrigerator, Figure 3 is a vertical sectional view of other parts of the damper cover, and Figure 4 is a vertical sectional view of the other parts of the damper cover. 5 is a front view of the refrigerator excluding the heat insulating door and damper cover, etc., FIG. 5 is a front view of the damper cover excluding the front heat insulating plate, and FIG. 6 is a block diagram of the control circuit. (3)...Freezing room, (4)...Switching room, (10
〉...Refrigerating room, (14)...Cooler, (16)
, (17), (18)...Discharge air path, (6
4)...Horizontal center line, (65)...Protrusion, (6
7)... Throttle part, (F)... Blower, (D>.
··duct. Figure 1

Claims (1)

[Claims] 1. A partition wall housing a cooler, a freezing compartment formed above the partition wall, a refrigerator compartment formed below the partition wall, and a switching room capable of switching to freezing or a higher temperature range. , a cold air suction type blower installed at the rear of the cooler;
The duct has a blower room for accommodating the blower, and a duct that leads cold air to the freezing room, the refrigerator room, and the switching room. is provided with a discharge air path to the refrigerator compartment on the windward side with respect to the rotational direction of the blower, and a discharge air path to the switching chamber on the leeward side, and is located above the horizontal center line of the blower to switch the switch. A refrigerator comprising a protrusion projecting upwardly from a discharge air passage into the refrigerator compartment, and a constriction part narrowing the entrance of the discharge air passage into the refrigerator compartment.