JP2002243339A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a supply amount of cold air to a refrigerating chamber and a vegetable chamber after a stop of a compressor and to further shorten an operation time of the compressor. SOLUTION: An on-off valve 25 closed after a stop of a compressor 21 is situated between a throttle device 23 and a first cooler 13 of a refrigerating cycle. The refrigerant cycle is formed of the compressor 21, a condenser 22, the first cooler 13 corresponding to a refrigerating chamber and a vegetable chamber, a second cooler 19 corresponding to a freezer, and an accumulator 24, and interconnected in the order through piping. By preventing an inflow of a high temperature refrigerant to the first cooler 13, the increase of the temperature of the first cooler 13 is suppressed, and a feed amount of cold air to a refrigerating chamber and a vegetable chamber is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator in which a first cooler corresponding to a refrigerator room and a vegetable room and a second cooler corresponding to a freezer room are provided in series.

[0002]

2. Description of the Related Art As shown in FIG.
Insulation box 1 filled with insulation 4 between outer box 2 and inner box 3
Partitions 5 and 6 are provided inside the inner box (inner box 3) and divided into a refrigerator compartment 7, a vegetable compartment 8 and a freezing compartment 9, and doors 10, 11 and 12 are respectively provided.
The first cooler 13 corresponding to the refrigerator compartment 7 and the vegetable compartment 8 behind the vegetable compartment 8 and the forced air generated by the cooler 13 are forcedly circulated to the refrigerator compartment 7 and the vegetable compartment 8 A first air blower 14 is provided, and a cold air generation chamber 16 is provided, which is partitioned by a front cover 15, and cool air flows through a cool air passage 17 formed from the rear of the cold storage chamber 7 to the ceiling, as shown by an arrow, Is supplied to the vegetable compartment 8, and the returning cool air is configured to return to the lower part of the first cooler 13 through a cool air passage 18 formed in the front cover 15. A second cooler 19 dedicated to the refrigerator compartment 9, and a second blower 20 for forcibly circulating the cool air generated by the refrigerator 19 to the refrigerator compartment 9.
Etc. are provided.

FIG. 3 shows a conventional refrigeration cycle, in which a compressor 21, a condenser 22, a squeezing device (capillary tube) 23, a first cooler 13 dedicated to the refrigerator compartment 7 and the vegetable compartment 8, and a dedicated cooler 9 Of the refrigerator, the refrigerator compartment 7 and the vegetable compartment 8 are cooled to a predetermined temperature in the refrigerator, and the compressor 21
By operating the first blower 14 even after the stoppage, the cool air in the cool air generation chamber 16 is supplied to the refrigerator compartment 7 and the vegetable compartment 8, whereby the temperature rise in the refrigerator compartment 7 and the vegetable compartment 8 is moderated, The operation time of the compressor 21 is reduced.

[0004]

However, in the refrigeration cycle, when the compressor 21 is stopped, the high-pressure side high-temperature refrigerant passes through the expansion device (capillary tube) 23 and the first cooler 13.
Flows into As a result, the temperature of the first cooler 13 increases, and the temperature difference between the first cooler 13 and the circulating air decreases,
There is a problem that the heat exchange between the two becomes poor, and it becomes impossible to obtain the cool air required to suppress the temperature rise in the refrigerator compartment 7 and the vegetable compartment 8. Therefore, an object of the present invention is to provide a refrigerator that suppresses the flow of high-temperature refrigerant into the first cooler after the compressor stops.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a condenser and a throttling device are sequentially connected to a discharge side of a compressor, and the throttling device and the compressor are connected. A refrigeration cycle including a first cooler corresponding to a refrigerator compartment and a vegetable compartment, a second cooler corresponding to a freezer compartment provided in series with the suction side, and cold air generated by the first cooler. A first blower for forcibly circulating the cold room and the vegetable room, and a second blower for forcibly circulating the cool air generated by the second cooler to the freezing room. (1) In a refrigerator configured to operate a blower and suppress a temperature rise in the refrigerator compartment and the vegetable compartment, an open / close valve is provided between the expansion device and the first or second cooler connected to the expansion device. Provided and close the on-off valve after the compressor is stopped A configuration consisting of Te Unishi.

[0006] The on-off valve is closed several seconds after the compressor is stopped.

[0007] Further, after the compressor is stopped, the on-off valve is opened when the temperature of the refrigerator compartment or the freezer compartment becomes a pre-start set temperature lower than a set start temperature for starting the compressor by a predetermined value. The configuration will be as follows.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. The same reference numerals are used for the same parts as in the conventional example. FIG. 1 is a cross-sectional view showing a schematic configuration of a refrigerator. Reference numeral 1 denotes a heat insulating box formed by filling a heat insulating material 4 between an outer box 2 and an inner box 3. The interior of the heat-insulating box 1 (the inner box 3) is partitioned by partitions 5 and 6 into a refrigerator compartment 7, a vegetable compartment 8,
The compartment is divided into a freezer compartment 9 and doors 10, 11, and 12 are provided in each compartment.

[0009] Behind the vegetable compartment 8, a first cooler 13 corresponding to the refrigerator compartment 7 and the vegetable compartment 8, and a first cooler forcibly circulating the cool air generated by the cooler 13 to the refrigerator compartment 7 and the vegetable compartment 8. A cool air generation chamber including a blower 14 and partitioned by a front cover 15
The cold air is supplied from the refrigerator compartment 7 to the vegetable compartment 8 as shown by an arrow through a cold air passage 17 formed from the rear of the refrigerator compartment 7 to the ceiling, and the return cool air is provided at the lower part of the front cover 15. It is configured to return to the lower part of the first cooler 13 through the formed cool air passage 18. On the other hand, behind the freezing room 9, a second cooler 19 dedicated to the freezing room 9 and a second blower 20 for forcibly circulating the cool air generated by the freezing room 19 to the freezing room 9 are provided.
Etc. are provided.

FIG. 2 shows a refrigerating cycle of the refrigerator, in which a compressor 21, a condenser 22, a throttle device (capillary tube) 23,
Opening / closing valve 25, first refrigerator 1 exclusively for refrigerator compartment 7 and vegetable compartment 8
3. The second cooler 19 and the accumulator 24 dedicated to the freezing room 9 are sequentially connected in series with pipes. The open / close valve 25 is provided between the expansion device (capillary tube) 23 and the first cooler 13.
It is characterized in that the on-off valve 25 is closed after the compressor 21 stops. If the refrigeration cycle (open / close valve 25) is closed immediately after the stop of the compressor 21, the sudden stop of the refrigerant flow may adversely affect the compressor 21 or the open / close valve 25 itself, such as an impact. The on-off valve 25 is closed several seconds after the operation is stopped and the flow of the refrigerant becomes gentle.

After the compressor 21 is stopped, for example, the temperature of the refrigerating chamber 7 becomes a pre-start set temperature lower by a predetermined value (for example, 0.5 to 1 ° C.) than a start set temperature for starting the compressor 21. At this time, the on-off valve 25 is opened. In addition,
The arrows shown in the figure indicate the direction of the flow of the refrigerant when the compressor 21 operates.

In the refrigerator, the inside of the refrigerator (the refrigerator compartment 7 and the freezer compartment 9) is cooled to a predetermined temperature, and the compressor 21
When the first air blower 14 is stopped, the first blower 14 is operated to dissolve the frost that has arrived at the first cooler 13 during the operation of the compressor and exchange heat with the air in the cold air generation chamber 16 due to the temperature difference. It is sent into the refrigerator (refrigeration room 7). Thereby, even when the compressor 21 is stopped, the temperature rise of the refrigerator compartment 7 and the vegetable compartment 8 can be suppressed. However, in the present invention, after the compressor 21 is stopped, the on-off valve 25 is closed and the high pressure side is closed. Is the first high-temperature refrigerant
Since it is prevented from flowing into the cooler 13, the first cooler 13 is kept at a low temperature for a long time as compared with the conventional refrigerator, and the temperature rise in the refrigerator compartment 7 and the vegetable compartment 8 is more gradual. Can be

When the on-off valve 25 is kept closed when the compressor 21 is stopped, the compressor 21 is kept unbalanced between the high pressure side and the low pressure side of the refrigeration cycle.
Will be activated, causing a problem. Therefore, in the present invention, as described above, after the compressor 21 is stopped, for example, the temperature of the refrigerating chamber 7 is lower by a predetermined value (for example, 0.5 to 1 ° C.) than the start set temperature at which the compressor 21 is started. When the preset temperature is reached, the on-off valve 25 is opened to balance the pressure of the refrigeration cycle.

[0014]

According to the refrigerator having the refrigeration cycle as described above, after the compressor is stopped, the flow of the high-temperature refrigerant into the coolers corresponding to the refrigerator compartment and the vegetable compartment is prevented. The temperature rise of the cooler becomes slower than that of the conventional one, the cold air supply to the refrigerator compartment and the vegetable compartment can be performed longer, the operation time of the compressor is shortened,
It will be a power-saving refrigerator than before.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a schematic configuration of a refrigerator according to the present invention and a conventional example.

FIG. 2 is a configuration diagram of a refrigeration cycle showing one embodiment of the present invention.

FIG. 3 is a configuration diagram of a refrigeration cycle showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated box 7 Refrigerator room 8 Vegetable room 9 Freezer room 13 First cooler 14 First blower 15 Front cover 16 Cold air generation room 17 Cold air passage 18 Cold air passage 19 Second cooler 20 Second blower 21 Compressor 22 Condenser 23 Throttling device (capillary tube) 24 Accumulator 25 On-off valve

Claims (3)

[Claims] 1. A condenser and a throttling device are sequentially connected to a discharge side of a compressor, and a first cooler corresponding to a refrigerator room and a vegetable room is connected between the throttling device and a suction side of the compressor; A refrigeration cycle in which a second cooler corresponding to a room is provided in series, a first blower for forcibly circulating cool air generated by the first cooler to the refrigerator room and the vegetable room, and the second cooler Second forcibly circulating the cool air generated in the freezing room.
A refrigerator, comprising: a blower, wherein when the compressor is stopped, the first blower is operated to suppress a rise in the temperature of the refrigerator compartment and the vegetable compartment, wherein the expansion device and the expansion device are connected to the expansion device. An on-off valve is provided between the first and second coolers, and the on-off valve is closed after the compressor is stopped. 2. The refrigerator according to claim 1, wherein said on-off valve is closed after said compressor is stopped and a predetermined time has elapsed. 3. After the compressor stops, the on-off valve is opened when the temperature of the refrigerator compartment or the freezer compartment reaches a pre-start set temperature lower than a set start temperature for starting the compressor by a predetermined value. The refrigerator according to claim 1, wherein: