JPH0447585Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a four-temperature refrigerator that can store various foods at appropriate temperatures, and is particularly suitable for converting the low temperature room into a freezing room. It concerns the air passage structure and partition structure.

[Conventional technology]

FIGS. 6 and 7 are a front view and a cross-sectional view of a conventional four-temperature refrigerator disclosed in Japanese Utility Model Application No. 60-121183. In the figure, 1 is the freezer compartment, 2 is the refrigerator compartment,
3 is a vegetable compartment, 4 is a cold room, 4a is a cold room blow-out duct, 4b is a cold room suction duct, 1b is a freezer compartment suction duct, 2b is a refrigerator compartment suction duct, 5 is a cooler, H is glass Tube heater, 6 is damper thermo for cold room, 7 is damper thermo for cold room, 8
9 is a partition between a refrigerator room and a cold room, 9 is a partition between a vegetable room and a cold room, 10 is a cooling room, and F is a fan for forced circulation of cold air.

Next, the operation will be explained. The cold air flowing into the cold room 4 from the cold room blowing duct 4a is sent to the cold room.
It returns to the cooling room 10 via the cold room suction duct 4b of the cold room partition 8. On the other hand, the cold air in the vegetable compartment 3 is transferred from a portion of the cold air from the low temperature compartment 4 to the vegetable compartment/low temperature compartment partition 9.
The cool air flows through the rear slit _S1 , returns to the cold room ₄ through the slit S2 in front of the partition 9 due to natural convection, and then passes through the duct 8a in front of the partition 8 to the cold air in the refrigerator compartment 2. and returns to the cooling room 10 via the refrigerator room suction duct 2b.

[Problem that the invention attempts to solve]

Conventional refrigerators are configured as described above, so if you use the low-temperature room as a freezer, low-temperature cold air may leak into the vegetable compartment or refrigerator compartment, causing food to freeze or entering the refrigerator compartment or vegetable compartment. There was a risk of frost or dew. Therefore, there was a problem in that it was difficult to use the cold room as it was as a freezing room.

This idea was made to solve the problems mentioned above, and it prevents cold air from leaking into the refrigerator and vegetable compartments, and also prevents heat leakage from the refrigerator and vegetable compartments due to conduction. To provide a refrigerator with a new air passage structure that takes into consideration the circulation of cold air so that the low temperature room can be used as a freezing room as needed without being too cold.

[Means for solving problems]

In order to prevent the generation of frost and dew due to cold air leakage and heat leakage, the refrigerator according to this invention has a duct on the side of the cold room that returns cold air from the cold room to the cooling room, and a vegetable compartment and a Both the outlet and suction ducts for the vegetable compartment that communicate with the refrigerator compartment are installed on the side of the cold room so that some of the cold air from the refrigerator compartment flows into the vegetable compartment and then returns to the refrigerator compartment. be.

[Effect]

In the refrigerator of this invention, cold air flowing into the cold room from the cooling room is guided to the cold room suction duct without passing through the vegetable compartment or the refrigerator compartment, and returns directly to the cooling room via the freezer compartment suction duct. Cold air circulation between the refrigerator compartment and the vegetable compartment is performed only through both the vegetable compartment outlet and suction ducts. Therefore, even when switching from a low-temperature room to a freezing room, low-temperature cold air will not flow directly into the refrigerator or vegetable compartment, preventing condensation and frost from forming, and reducing the risk of frozen foods and vegetables freezing. do not have.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. Note that the same reference numerals are given to the same or equivalent parts as in the conventional art, and detailed description thereof will be omitted. Figures 1 and 2
In the figure, 11 is a freezer main body. Reference numeral 12 denotes a cold room suction duct for returning cold air from the cold room 4 to the cooling room 10 via the freezing room suction duct 1b. A suction port 12a is opened on the side surface. In this embodiment, they are arranged in a pair on the left and right.
Reference numeral 13 designates a vegetable compartment outlet duct that sends cold air from the refrigerator compartment 2 into the vegetable compartment 3; 14 designates a vegetable compartment suction duct that returns cold air from the vegetable compartment 3 to the refrigerator compartment 2; It is located in In this embodiment, they are arranged in a pair on the left and right. 13a,1
4a is a suction port, and 13b and 14b are discharge ports.

FIG. 3 is a cross-sectional view showing the heat insulation structure of each of the ducts 12, 13, 14 and the cold room outlet duct 4a. As is clear from the figure, the ducts are formed by cutting out the urethane material U on the box side. A heat insulating material 16 made of expanded polystyrene is inserted between the ventilation passage 15 and the inner box wall 11a of the refrigerator main body 11. Thereby, even if there is a large temperature difference between the inside of the duct ventilation passage 15 and the inside of the refrigerator, heat leakage can be suppressed to a minimum.

FIG. 4 and FIG. 5 show the structure of a partition that partitions the low temperature room 4 from the refrigerator compartment 2 and the vegetable compartment 3, which are adjacent rooms. 17 is a main part of the partition, 18 is a plastic upper partition plate, 19 is a reinforcing plate made of iron or the like along the inner surface of the upper plate 18, 2
0 is a vacuum heat insulating material, 21 is a lower partition plate also made of plastic, and 12 is a heat insulating material such as urethane material injected into the partition main body 17. Numeral 23 is a locking claw for fixing the partition 17 to the inner box wall 11a, and a plurality of locking claws are provided protruding from the side surface of the partition main body 17 as shown in FIG. Reference numeral 24 denotes a sealing member for preventing cold air leakage, which is attached to the periphery of the lower surface of the partition main body 17, and is crimped to the stepped portion 11b of the inner box wall 11a by the action of the locking claw 23.

Next, the operation will be explained. There is no problem in using the low-temperature chamber 4 as a refrigerator or a low-temperature chamber, and it is also possible in the conventional example, so here we will explain the case where it is used as a freezing chamber. The cold air heat-exchanged by the cooler 5 passes through the back duct and is sent to the damper thermos 6 for a cold room. When the damper thermostat 6 is open, cold air passes through the cold room blow-off duct 4a and is blown out from the blow-off port 4c on the back side of the cold room 4. After circulating in the cold room 4, the cold air passes through the switching room suction ducts 12 arranged on both sides of the refrigerator compartment 2, joins with the cold air in the freezer compartment 1 in the freezer compartment suction duct 1b, and enters the cooling room. Return to step 10 and repeat the above circulation operation again. On the other hand, a part of the cold air that has been heat exchanged in the cooler 5 and transported through the back duct of the freezer compartment 1 is
It is sent to damper thermo 7 for the refrigerator compartment. here,
When the damper thermostat 7 is open, cold air is blown out from the outlet 4d near the damper thermostat 7 and circulates within the refrigerator compartment 2. A part of the cold air is sucked in from the suction port 13a, passes through the vegetable compartment blowing duct 13 by natural convection, and is blown out into the vegetable compartment 3 from the discharge port 13b. The cold air whose temperature has increased by circulating through the vegetable compartment 3 enters the suction port 14a, and passes through the vegetable compartment suction duct 14 arranged on the front side of both sides of the cold room 4.
The liquid is sent to the refrigerator compartment 2 and blown out from the discharge port 14b. Then, it circulates through the refrigerator compartment 2, joins with the cold air whose temperature has increased, passes through the refrigerator compartment suction duct 2b, returns to the cooling compartment 10, and repeats the above operation again. The above is an outline of the cold air circulation operation using the air passage structure according to this invention.

Next, the effect of preventing heat leakage when the low temperature chamber 4 is used as a freezing chamber by changing its temperature setting will be described.

The internal temperature at this time is approximately 3℃ in refrigerator compartment 2.
The temperature of the vegetable compartment 3 is around 6°C, and the temperature of the cold room 4 used as a freezer is -18°C. Therefore, when the cold air returning from the cold room 4 passes through the duct 12, the temperature difference between the cold room 2 and the duct 12 is approximately
If the temperature is 20°C and the humidity inside the refrigerator compartment 2 is high, there is a risk of dew or frost forming on the surface of the duct on the refrigerator compartment 2 side.
There is no risk of this happening as insulation is provided. In addition, ducts 13 and 14 arranged in the side wall of the low temperature room 4
The same applies to (in this case, duct 13,
Because the temperature inside 14 is high and the temperature in cold room 4 is low,
(There is a risk of dew or frost forming on the inner surfaces of the ducts 13 and 14), heat leakage is blocked by the insulation material 16,
Phenomena of dew condensation and frost buildup are prevented.

Further, the effect of preventing leakage of cold heat between the low temperature chamber 4 and the adjacent chambers 2 and 3 above and below it is as follows.

When using the cold room 4 as a freezing room, the temperature of the cold room is maintained at -18°C, so if some of the cold air leaks into the refrigerator compartment 2 or the vegetable compartment 3, the cold room 4
There is a risk that the food in vegetable compartment 3 may freeze. In order to prevent this, locking claws 23 are provided on the outer peripheral side of the partition main body 17 as shown in FIGS. 4 and 5.
By engaging with the inner box wall 11a, the inner partition main body 17
The heat-sealing member 24 pasted around the outer periphery of the lower surface is sufficiently compressed to improve sealing performance.

In addition, leakage of cold and heat is caused not only by cold air leakage but also by heat leakage, and to prevent this, it is necessary to provide sufficient insulation for the upper and lower partitions of the cold room 4, and to make the insulation thickness as thin as possible. It is desirable to secure the internal volume inside the refrigerator. Such conditions are such that in this embodiment, the vacuum insulation material 20, which is thin but has high insulation performance, is used in combination with the urethane material 22, and the strength of the thinner material is equal to that of the upper plate of the inner partition. By maintaining the reinforcement plate 19 built into the back surface of 18, this can be satisfactorily satisfied.

In addition, in the above embodiment, a case has been described in which a low temperature room that can be switched as a freezing room is placed between two rooms with a high temperature range, but the partition structure can have the same effect even if it is only on one side. In addition, although the partition in the above example has a structure in which urethane is injected from above the vacuum insulation material, it is also possible to use only the vacuum insulation material, and the vacuum insulation material can be made of fiber vacuum insulation material or multilayer vacuum insulation material, which has the same effect. play. Further, although the locking claws of the inner partition are provided on the inner partition side, they may be provided on the mating component side.

[Effect of idea]

As described above, according to this invention, a cold room suction duct that returns cold air from the cold room to the cooling room is provided on the side of the refrigerator compartment, and both the vegetable compartment outlet and suction ducts connect the vegetable compartment and the refrigerator compartment. Since the structure is such that the refrigerator is provided on the side of the cold room, the cold room of a conventional refrigerator can be used as a refrigerator compartment, and food in the vegetable compartment can also be used as a freezer without freezing.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a refrigerator according to an embodiment of this invention, Figure 2 is a front view of Figure 1, Figure 3 is a cross-sectional view of the duct structure of this invention, and Figure 4 is a cross-sectional view of a refrigerator according to this invention. Detailed sectional view of the partition part in one embodiment,
Figure 5 is a perspective view of the partition in Figure 4, Figures 6 and 7.
The figures are a front view and a sectional view of a conventional refrigerator, respectively. 1 is a freezer compartment, 2 is a refrigerator compartment, 3 is a vegetable compartment, 4 is a cold room (can be switched as a freezer compartment), 10 is a cooling compartment,
11 is the refrigerator body, 11a is the inner box wall, 12 is the cold room suction duct, 13 is the vegetable compartment outlet duct, 1
4 is a suction duct for the vegetable compartment, 17 is a partition, 19 is a reinforcing plate, 20 is a vacuum insulation material, 22 is a heat insulation material (urethane material), 23 is a locking claw, and 24 is a sealing member. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The interior of the refrigerator is partitioned from the top into a freezer compartment, a refrigerator compartment, a low temperature compartment, and a vegetable compartment, each of which is set at a different temperature, and the cold air from the cooling compartment is passed through each of the compartments. In a four-temperature type refrigerator with forced circulation, a cold room suction duct that returns cold air from the cold room to the cooling room is arranged on the side of the refrigerator room, and a vegetable room that communicates the vegetable room with the refrigerator room is installed. A refrigerator characterized in that both air outlet and suction ducts are arranged on the sides of a cold room. (2) The partition that separates the cold room from the adjacent room is made of a laminated reinforcing plate and a heat insulating material, the outer surface of which is covered with a synthetic resin material, and the outer surface of the covering is made of a material that can be tightly attached to the wall of the inner box of the refrigerator. A refrigerator according to claim 1 of the utility model registration claim, which is formed by pasting a sealing member.