JPS5851180B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-temperature refrigerator that supplies part of the cold air from the freezer compartment to the refrigerator compartment to cool the refrigerator compartment as well as the freezer compartment. The purpose is to stably supply cold air from the freezer compartment to the refrigerator compartment regardless of the situation.

The present invention will be described in detail below with reference to FIGS. 1 to 3. Reference numeral 1 refers to a refrigerator whose main body is composed of a heat insulating wall 2 having an opening on the front, and a removable heat insulating partition wall 3 inside the refrigerator. The freezer compartment 4 and the refrigerator compartment 5 are vertically installed to form partitions on the left and right, and the openings of the freezer compartment and the refrigerator compartment are each divided into two compartments by horizontally installing a partition body 6 in the opening. .

I is the insulation door of the freezer compartment, 8 is the insulation door of the refrigerator compartment,
The openings of the freezer compartment 4 and the refrigerator compartment 5 are pivotally connected to the refrigerator body 1 so as to be openable and closable.

Reference numeral 9 denotes a cooling chamber that accommodates a cooler 10 and a fan 11 for the freezer compartment; 12 a cooler cover having a discharge port 13 formed on an upper sloped surface and a suction port 14 formed on a lower sloped surface; It is formed by providing a cooler cover 12 on the back side of 4.

Reference numeral 15 denotes a side channel cover having a U-shape in cross section, and by providing this cover along the wall surface of the freezer compartment side of the partition wall 3, a side channel 16 is formed with openings 16a, 16bL at the upper and lower portions.

The cover is attached to the partition wall 3 so that its upper end is higher than the lower end of the discharge port 13 and its lower end is lower than the upper end of the suction port 14.

17 and 18 are bent discharge and suction ducts formed in the partition wall 3, the discharge duct is located higher than the suction duct, and both ducts are connected to the freezer compartment side openings 17a, 18a, t, and above the openings. Refrigerator compartment side opening 17b located at.

18b, respectively, the freezer compartment side opening 17a of the discharge duct 17 is formed at a position facing into the side passage 16, and the freezer compartment side opening 18a of the suction duct 18 is formed at approximately the same height as the suction port 14. , and is formed at a position lower than the lower end of the side passage cover 15.

Reference numeral 19 denotes a refrigerator compartment fan located on the side of the refrigerator compartment side opening 17b of the discharge duct 17, and is surrounded by a fan case 20 having an inlet 20a at the back.

Reference numeral 21 denotes a duct cover that covers the refrigerating compartment side opening 18b of the suction duct 18, and by providing this cover along the refrigerating compartment side wall surface of the partition wall 3, a suction passage 22 having an opening 22a at the lower part of the refrigerating compartment 5 is formed. be done.

23 and 24 are shelves provided in the freezer and refrigerator compartments.

FIG. 4 shows a control electric circuit, where 25 is a compressor connected in series to the power supply V via the normally closed contact Tb of the timer T and the freezer thermostat 26, and 27 is the normally open contact Ta of the timer and the defrosting chamber. A defrosting device such as an electric heater is connected in parallel to the power source via the termination thermostat 28, 29 is a door switch for the freezer compartment 4 connected in parallel to the power source via the freezer fan 11, and 30 is for the refrigerator compartment. Freezer compartment fan 1 via fan 19 and refrigerator compartment thermostat 31
The door switch 32 of the refrigerator compartment 5 is connected in parallel with the fan 11 for the freezer compartment and the refrigerator compartment.
19 is operated regardless of whether the freezer compartment thermostat 26 is open or closed, and the freezer compartment fan 11 is operated by the normally closed contact T of the timer T.
Operation is stopped during defrosting when b is opened, or when the door switch 29 is opened as shown by the chain line. The operation is stopped when any one switch of the refrigerator thermostat 31 is in the open position shown by the chain line.

Next, cold air circulation in the freezer compartment 4 and refrigerator compartment 5 will be explained with reference to FIGS. 1 to 3.

Although cold air circulation is not performed when the refrigerator 1 is opened as shown in FIG. 1, it is assumed that cold air circulation is performed for the sake of explanation.
I marked the cold air flow with an arrow.

The freezer compartment 4 is cooled by forcibly circulating the cold air heat-exchanged by the cooler 10 in the front-rear direction as a circulating flow using the freezer compartment fan 11.

Note that the solid arrow line in FIG. 1 indicates the cold air blown out from the discharge port 13, and the dashed arrow line indicates the cold air returning to the suction port 14.

The refrigerator compartment 5 uses the refrigerator compartment fan 1 to direct the cold air passing through the side passage 16 to the refrigerator compartment fan 1.
9 into the room from the discharge duct 17, forced circulation in the lateral direction, and returned to the freezer compartment 4 via the suction duct 18, thereby cooling.

According to the above configuration, the cold air passing through the side passage 16 is transferred to the cooler 1
This is part of the cold air that has undergone heat exchange at 0 and is blown out from the discharge port 13 into the freezer compartment 4. Since the dynamic pressure direction is always kept constant by the side channel cover 15, the load stored in the freezer compartment 4 (
Even if the dynamic pressure changes due to the storage condition of stored items, the cold air is supplied to the refrigerator compartment 5 by the refrigerator compartment fan 19 through the discharge duct 17, so that a stable supply of cold air to the refrigerator compartment 5 can be achieved. Since the supplied cold air is low-humidity cold air that has been heat exchanged with the cooler 10, the cold air that has been heat exchanged with the load in the freezer compartment 4 is not supplied to the refrigerator compartment 5, and the cold air inside the refrigerator compartment 5 is The cooling effect can be improved.

In addition, the cold air passing through the side passage 16 is part of the cold air passing through the freezer compartment 4, and is maintained at a lower pressure than the pressure of the cold air in the cooling compartment 9. When stopped, the pressures in the side passage 16 and the refrigerator compartment 5 become equal, and leakage of cold air from the side passage 16 to the refrigerator compartment 5 via the discharge duct 17 can be prevented.

In addition, by guiding a part of the cold air passing through the side passage 16 to the refrigerator compartment 5 through the discharge duct 17, the remaining cold air joins the return cold air from the suction duct 18 from the lower opening 16b of the side passage 16. Since the return cold air from the suction duct 18 is not guided to the discharge duct 17 via the side passage 16, frost formation on the lower end of the side passage cover 15 can be prevented, and the lower part of the side passage 16 can be prevented from forming. It is possible to prevent the opening 16b from being blocked by frost.

In addition, the freezer compartment side opening 17a of the discharge and suction ducts N7 and 18
, 18a to the refrigerator compartment side opening 17b.

By forming 18b at a high position, it is possible to prevent cold air from flowing back from the freezer compartment 4 to the refrigerator compartment 5 due to the static pressure in the rain duct when the operation of the freezer compartment fan 11 and the refrigerator compartment fan 19 is stopped.

In addition, a duct cover 21 that covers the refrigerating compartment side opening 18b of the suction duct 18 is disposed on the refrigerating compartment side of the partition wall 3 to form a suction passage 22 having an opening 22a at the lower part of the refrigerating compartment 5. A short cycle of cold air from the duct 17 can be prevented.

Furthermore, by forming the inlet 20a in the fan case 20 that allows the cold air from the discharge duct 18 to mix with a part of the cold air in the refrigerator compartment 5, the amount of frost formed on the fan case 200 can be reduced.

As described above, the present invention provides a partition wall inside the refrigerator to partition the freezer compartment and the refrigerator compartment on the left and right, and provides a cooler, a freezer compartment fan, and a cooler cover on the back of the freezer compartment. to form a cooling chamber with the upper part as the discharge port and the lower part as the suction port,
A side channel cover is provided along the side surface of the freezer compartment of the partition wall, and a side channel is formed through which part of the cold air that is exchanged with the cooler and blown out into the freezer compartment and passes through the freezer compartment in the vertical direction,
A discharge duct that guides a part of the cold air passing through the side passage to the refrigerator compartment, with the opening on the refrigerator compartment side positioned higher than the opening on the freezer compartment side, and a discharge duct located at the bottom of the duct, with the opening on the refrigerator compartment side positioned higher than the opening on the freezer compartment side. A suction duct that guides cold air from the refrigerator compartment to the freezer compartment is formed in the partition wall at a high position, and a refrigerator compartment fan operated by the refrigerator compartment thermostat and a fan surrounding the fan are formed on the refrigerator compartment side of the discharge duct. Since the system is characterized by being equipped with a fan case for cooling and freezing, the cold air circulation in the freezing and refrigerating compartments can be performed independently by both the freezer and refrigerating compartment fans, and the load storage of the freezing compartment can be carried out independently. Regardless of the condition, the dynamic pressure direction of the cold air passing through the side channel can be kept constant to ensure a stable supply of cold air to the refrigerator compartment, and a portion of the cold air once blown into the freezer compartment can be directed to the side channel. Therefore, the pressure of the cold air passing through the side channel can be maintained lower than that in the cooling room and approximately the same as the pressure in the refrigerator compartment, and there is no need to use a cold air cutoff device such as a damper when the refrigerator compartment fan is stopped. 0 that can prevent cold air from leaking from the freezer compartment to the refrigerator compartment

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a view of the refrigerator with the door open, FIG. 2 is a sectional view taken along line AA in the open state of FIG. 1, and FIG. B line sectional view, 4th
The figure is a control electric circuit diagram.
・Suction duct, 19... Refrigerator room fan.

Claims (1)

[Scope of Claims] 1. A partition wall is provided in the refrigerator to partition the freezer compartment and the refrigerator compartment on the left and right, and a cooler, a fan for the freezer compartment, and a cooler cover are provided on the back of the freezer compartment. A cooling chamber is formed with an upper part as a discharge port and a lower part as a suction port, and a side channel cover is provided along the side of the freezer compartment of the partition wall, and heat is exchanged with the cooler and blown into the freezer compartment. A discharge duct that forms a side passage through which part of the cold air passing through the side passage passes in the vertical direction, and guides a part of the cold air passing through the side passage to the refrigerator compartment, with the opening on the refrigerator compartment side located higher than the opening on the freezer compartment side. , located at the bottom of the duct,
A suction duct for guiding cold air from the refrigerator compartment to the freezer compartment is formed in the partition wall with the opening on the refrigerator compartment side positioned higher than the opening on the freezer compartment side, and the discharge duct is operated by a refrigerator compartment thermostat on the refrigerator compartment side. A refrigerator comprising a refrigerator fan and a fan case surrounding the fan. 2. Claim 1, characterized in that a duct cover covering the opening of the suction duct on the refrigerator compartment side is disposed on the refrigerator compartment side of the partition wall to form a suction passage having an opening in the lower part of the refrigerator compartment. refrigerator. 3. The refrigerator according to claim 1 or 2, characterized in that an inlet is formed in the fan case through which the cold air from the discharge duct is mixed with a part of the cold air in the refrigerator compartment.