JPS5835980Y2 - Freezer refrigerator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a three-door refrigerator-freezer equipped with three independent compartments: a freezer compartment, a refrigerator compartment, and a freezer/refrigerator compartment that can be switched to either a freezing compartment or a refrigerator compartment.

A conventional three-door refrigerator-freezer will be explained with reference to FIG.

In Figure 1, 6 is the box of the refrigerator-freezer, 1 is the freezer compartment, and 2
Reference numeral denotes a freezer/refrigerator compartment which can be used as either a freezer or a refrigerator; 7 and 8 are a freezer compartment door and a freezer/refrigerator compartment door provided at the front of the box body 6, respectively.

Reference numeral 10 indicates a horizontal partition, and reference numeral 14 indicates a freezing/refrigerating chamber discharge port provided in the horizontal partition 10.

3 is an evaporator installed in an evaporator chamber 21 partitioned by an evaporator chamber partition 11 at the rear of the freezing/refrigerating chamber 2, and the evaporator 3 is a stack of two thin evaporators 3Z3//. It is something.

9 is a fan that forcibly circulates cold air. Note that 4 is a compressor and 5 is a condenser.

A horizontal partition is provided between the freezer compartment 1 and the freezer/refrigerator compartment 2 to divide the two compartments into upper and lower sections, and a front compartment consisting of the freezer compartment 1 and the freezer/refrigerator compartment 2 and a rear compartment (with only the refrigerator compartment) are provided. Although not shown in the figure, the vertical and middle partitions (located at the back of the freezer compartment 1 and the freezer/refrigerator compartment 2) are partitioned into the front and back (corresponding to an insulated wall with a refrigerator compartment outlet 12 and a refrigerator compartment suction port 13). ), three compartments are provided: a freezer compartment 1, a refrigerator compartment, and a freezer/refrigerator compartment 2.

In the refrigerator-freezer configured in this manner, cold air cooled by the evaporator 3 is discharged into the freezer compartment 1 by the fan 9.

A portion of the cold air discharged into the freezer compartment 1 passes through an automatic damper (not shown) provided at the refrigerator compartment outlet 12 and is discharged into the refrigerator compartment (not shown), thereby optimally controlling the temperature of the refrigerator compartment. be done.

Return cold air from the refrigerator compartment exits from the refrigerator compartment suction port 13 provided in the vertical and medium partitions at the bottom of the refrigerator compartment, returns to the evaporator 3, and circulates.

When the freezer/refrigerator compartment 2 is used as a freezing compartment, a switching shutter (not shown) provided at the freezer/refrigerator compartment discharge port 14 in the horizontal partition 10 is opened, and the cold air returned from the freezer compartment 1 is sent directly to the freezer/refrigerator compartment. 2 to cool the freezer/refrigerator compartment 2 to the same temperature as the freezer compartment 1.

Return cold air from the freezer/refrigerator compartment 2 enters the evaporator 3 from the freezer/refrigerator compartment suction port 15 and is circulated.

On the other hand, when using the freezer/refrigerator compartment 2 as a refrigerator compartment,
A switching shutter (not shown) provided at the outlet port 14 of the freezer/refrigerator compartment is closed, and most of the return cold air from the freezer compartment 1 is passed through the freezer compartment return cold air duct 18 provided at the rear of the freezer/refrigerator compartment 2 to the evaporator 3. lead.

A portion of the cold air returned to the freezer compartment passes through an automatic damper (not shown) that is installed in the freezer/refrigerator compartment outlet 14 in parallel with the switching shutter and detects the temperature of the freezer/refrigerator compartment 2 and controls the flow rate of the circulating cold air. The liquid is then discharged to the freezing/refrigerating compartment 2, where it is cooled to approximately the same temperature as the refrigerating compartment.

Return cold air from the freezer/refrigerator compartment 2 passes through the freezer/refrigerator compartment suction port 15, enters the evaporator 3, and circulates.

In the conventional three-door refrigerator-freezer described above, it was necessary to provide a freezer-compartment return cold air duct 18 at the rear of the freezer-refrigerator compartment 2 for guiding the return cold air from the freezer compartment 1 to the evaporator 3.

Since the air volume in the freezer compartment return cold air duct 18 is a large part of the total air volume circulating in the refrigerator/freezer compartment 2 when it is used as a refrigerator compartment, the cross-sectional area of the air path must be large.

Therefore, there was a drawback that the effective internal area of the freezer/refrigerator compartment 2 was reduced accordingly.

Manoko, in the conventional air passage configuration, there is a freezer compartment 1, a freezer/refrigerator compartment 2,
The cold air from the three refrigerator compartments once joins in the lowest space of the evaporator room 21 and returns to the evaporator 3, so if the ambient conditions are about 30°C and the humidity is 70% or more and the door is opened and closed frequently, Cold air containing a large amount of moisture returns to the evaporator 3 from the refrigerator room with high absolute humidity and the freezer/refrigerator room 2 whose temperature has been switched to a temperature equivalent to that of the refrigerator room, and concentrates on the tips of the lower fins of the evaporator 3 to form frost. This progressed rapidly, and frost clogging was likely to occur.

When this frost clogging occurs, the amount of cold air circulating to the freezer compartment 1 is rapidly reduced, which has the drawback that the temperature of the freezer compartment 1 cannot be cooled to the set temperature.

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a three-door refrigerator-freezer that can be used either as a freezer or a refrigerator and has a large effective internal volume.

In order to achieve this objective, the present invention consists of an evaporator consisting of a pair of evaporator elements stacked on top of each other, a partition plate is provided between the pair of evaporator elements, and The cold air returned from the freezer compartment was introduced into the upper part of the container element, and the freezer compartment return cold air duct installed at the rear of the freezer/refrigerator compartment was removed.

The present invention will be explained below with reference to an embodiment shown in FIG.

In FIG. 2, the same parts as in FIG. 1 are denoted by the same numbers.

In FIG. 2, 3 is an evaporator consisting of a pair of evaporator elements 3Z3//, and between the pair of evaporators 3, a partition plate 17 having a height of about 1 of the evaporator is connected to the duct partition plate 16. It was set up as follows.

Since the return cold air path of the freezer compartment 1 is configured in this way, the cold air that passes through the freezer compartment 1 and returns to the evaporator 3 is directly guided from the upper part of the partitioned evaporator 3''.

The cold air cooled by the evaporator 3'' is returned from the refrigerator compartment (entered from the refrigerator compartment suction port 13) and the cold air returned from the freezer/refrigeration compartment 2 (refrigerated) in the lower half of the evaporators 3' and 3''. The evaporator 3' enters the refrigerator compartment through the suction port 15), is cooled, is further cooled in the upper half of the other evaporator 3', and is circulated.

The configuration and operation of the cold air circulation in the other freezer/refrigerator compartment 2 and the refrigerator compartment are the same as those of the conventional three-door freezer/refrigerator, so a description thereof will be omitted.

As explained above, according to the present invention, the evaporator is composed of a pair of evaporator elements stacked on top of each other, and a partition plate is provided between both evaporator elements, so that the cold air returned from the freezer compartment is directed toward the freezer/refrigerator compartment. Since the cold air is guided to the upper part of the evaporator element located at the top of the evaporator element, it is possible to eliminate the freezer return cold air duct provided at the rear of the freezer/refrigerator compartment, thereby increasing the effective internal volume of the freezer/refrigerator compartment. be able to.

In addition, most of the cold air that cooled the freezer compartment 1 returns into the evaporator 3 from the top of the evaporator 3'', so the ambient temperature is 30°C and the humidity is 7.
Even if frost clogging occurs at the tips of the lower fins of the evaporator 3 due to cold air containing a large amount of moisture returning from the refrigerator compartment under conditions where the door is opened and closed at 0% or higher, frost will not form on the middle fins of the evaporator. Since the cold air does not progress that much, the amount of cold air returned to the freezer is circulated without decreasing.

Therefore, it is possible to prevent the cooling performance from deteriorating due to the frost clogging of the freezer compartment 1, and to maintain a predetermined cooling performance for a long time.

[Brief explanation of the drawings] Figure 1 is a side sectional view showing a conventional three-door refrigerator-freezer;
FIG. 2 is a side sectional view showing a three-door refrigerator-freezer according to the present invention. 1... Freezer room, 2... Freezer/refrigerator room, 3
...Evaporator, 3t, 3rt...Evaporator element, 17...Partition plate.

Claims (1)

[Scope of utility model registration request] At least a freezer compartment and a refrigerator compartment are provided, and cold air cooled by a heat exchanger is discharged to the freezing compartment, and after being discharged to the freezing compartment, a part of the cold air that has passed through the freezing compartment is returned to the heat exchanger again. The rest of the cold air that has passed through the freezer compartment is discharged to the refrigerator compartment, and the cold air that has passed through the refrigerator compartment is returned to the heat exchanger and cooled again. It is composed of two heat exchangers, a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are arranged in parallel with each other, and the first heat exchanger A partition plate was provided between the exchanger and the second heat exchanger, reaching approximately the center from one end of the two, and a part of the cold air discharged from the freezer compartment was provided with the partition plate. The cold air is drawn into the first heat exchanger from the side, passes through the first heat exchanger along the partition plate, is drawn into the second heat exchanger, and is discharged from the refrigerator compartment. A refrigerator-freezer characterized in that air is drawn into a second heat exchanger from the side that is not heated.