JPS5926211Y2 - refrigerator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator in which a cold air passage for sending cold air to the refrigerator compartment is formed in a partition wall that partitions a freezer compartment and a refrigerator compartment.

A conventional refrigerator of this type will be explained with reference to FIG. 1. Air cooled by a cooler 1 is sent to a freezing compartment 3 by an internal fan 2, and the interior of the freezing compartment 3 is cooled.

A part of the cold air that has cooled the inside of the freezer compartment 3 is returned to the cooler 1 through a passage 5 in the middle partition wall 4, and the other part is returned to the cooler 1 through a passage 5 in the middle partition wall 4, and the other part is returned to the cooler 1 through a suction port 6a on the front side of the freezer compartment 3 in the middle partition wall 4. 7 Discharge port 6 at the rear
b, passes through a cold passage 6 formed at an angle in the partition wall 4, and is sent to the refrigerator compartment 7. After cooling the refrigerator compartment 7, a suction port 8a is opened on the front side of the refrigerator compartment 7. It is returned to the cooler 1 by a passage 8 in the partition wall 4 having the same structure.

A freezer thermostat 9 (not shown) is installed in the freezer compartment 3.
The operation of a well-known refrigeration cycle having an internal fan 2 and a cooler 1 is controlled so as to maintain the inside of the freezer compartment 3 at a predetermined temperature, for example, -18°C.

On the other hand, the cold storage room 7 is operated by a damper thermostat 10a (not shown) installed in the middle partition wall 4, and a cold air passage 6 in the middle partition wall 4 is operated.
The temperature is maintained at a predetermined temperature, for example, 3° C., by adjusting the opening degree of a damper 10 provided at the temperature.

In the above-mentioned refrigerator, the inside of the freezer compartment 3 is at a predetermined temperature, for example -
When the temperature reaches 18° C., the freezer thermostat 9 operates to stop the operation of the internal fan 2 and the refrigeration cycle.

At this time, cold air is sent to the refrigerator compartment 7 through the passage 8 in the partition wall 4 from the cooler 1 at the lowest temperature, for example, 25°C, in the refrigerator, and at the same time, the relatively loose air in the refrigerator compartment 7 is cooled. A cold air circulation path that is completely opposite to the normal cold air circulation path in which cold air is sent into the freezer compartment 3 through the cold air passage 6 in the partition wall 4 is formed by the natural convection phenomenon.

At this time, the damper thermo senses the cold air flowing into the refrigerator compartment 7 from the cooler 1 and closes the damper 10 to prevent backflow, but it takes a predetermined time to operate.
The relatively high temperature and high humidity air inside flows back through the cold air passage 6 and reaches the surface of the damper 10 and the back surface 4 of the partition wall 4 on the side of the freezer compartment 3.
Condensation condenses on surfaces such as a and becomes frost during the next cooling cycle, which may inhibit the operation of the damper 10 or reduce the passage area of the cold air passage 6 to keep the inside of the refrigerator compartment 7 at a predetermined temperature.
For example, there was a problem that the temperature could not be maintained at 3°C.

This invention was developed to solve the above problem, and by providing an air reservoir in the cold air passage of the partition wall, when the fan inside the refrigerator is stopped, the backflow warm air is retained in the air reservoir and transferred to the cold air passage. This prevents warm air from flowing in.

An embodiment of the present invention will be described below with reference to FIG. 2. Reference numeral 11 denotes an air reservoir provided near the refrigerator compartment outlet 6b of the cold air passage 6;
A recess is formed in the upper surface 6C of the cold air passage 6.

The rest is the same as the conventional example. To explain the operation of the above-mentioned refrigerator, the freezer compartment thermostat 9 closes its contacts (that is, when the freezer compartment 3 has not reached a predetermined temperature), and when the internal fan and refrigeration cycle are operating, cooling is performed as in the conventional example. The cold air from the container 1 is sent into the freezer compartment 3, part of it returns to the cooler 1 through the passage 5, and the other part is sent to the refrigerator compartment 7 through the cold air passage 6.
After cooling the refrigerator compartment 7, it returns to the cooler 1 through the passage 8.

At this time, the cold air having the same temperature as the cold air passing through the cold air passage 6 remains in the air reservoir 11 provided in the cold air passage 6, and does not affect the flow of cold air within the cold air passage 6.

When the freezer compartment 3 reaches a predetermined temperature, for example -18°C, the freezer thermostat 9 is activated, and the operation of the internal fan 2 and refrigeration cycle is stopped, causing a backflow as described in the conventional example, and the warm air inside the refrigerator compartment 7 is The cold air flows into the cold air passage 6.

However, the air reservoir 11 provided near the discharge port 6b prevents the warm air from rising toward the suction port 6a of the cold air passage 6.
During this time, the damper thermo 10a detects the cold air flowing into the refrigerator compartment 7 from the cooler 1 and closes the damper 10, so that the warm air overflowing the air reservoir 11 is prevented from rising by the damper 10, and the backflow is stopped.

Therefore, the back surface 4a of the partition wall 4 on the freezer compartment 3 side due to the backflow of warm air
Condensation on the refrigerator compartment 7 can be prevented, and the inside of the refrigerator compartment 7 can be maintained at a predetermined temperature.

As described above, by arranging the air reservoir 11 near the discharge port 6b of the cold air passage 6, condensation and frost formation due to backflow warm air can be prevented, resulting in malfunction of the damper 10 and temperature in the refrigerator room due to a reduction in the passage area of the cold air passage 6. Control defects can be prevented and the effect is great.

Fig. 3 shows an example of a refrigerator in which the cold air suction port of the cold air passage provided in the partition wall is formed near the cooler. The air is sent to the refrigerator compartment 7 through the damper 10 and the cold passage 6 in the partition wall 4 from the suction port 6d, and after cooling the refrigerator compartment 7, the air is sent to the partition wall having the suction port 8a on the front side of the refrigerator compartment 7. The other features are the same as those shown in FIG. By providing this, the cooler 1 passes through the cold air passage 6 and from the suction port 6d.
This prevents the flow of warm air from flowing back into the air.

As described above, the present invention does not require the use of any special components in a cold air passage that is equipped with a damper in the partition wall that sends cold air to the refrigerator compartment, regardless of the position of the intake port of the cold air passage. By simply providing a concave portion on the upper surface of the cold air passage, it is possible to prevent frost from forming on the back surface of the freezer compartment, etc., and it is also possible to prevent frost from forming on the surface of the damper.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a conventional cold air forced circulation type refrigerator with a cold air passage formed in the partition wall, Fig. 2 is an enlarged sectional view of the partition wall showing an embodiment of the present invention, and Fig. 3 FIG. 3 is a partial cross-sectional view of a refrigerator showing another embodiment of the present invention. 1... Cooler, 2... Internal fan, 3
...Freezer room, 4...Partition wall, 4a.
...Back surface of the partition wall on the freezer side, 5...Freezer compartment passage, 6...Cold air passage of the partition wall, 6a.
...Suction port on the front side of the freezer compartment, 6b...Discharge port of the cold air passage, 6C...Top surface of the cold air passage, 6d
... Suction port near the cooler, 7... Refrigerator compartment, 8... Refrigerator passageway, 8a... Suction port of refrigerator compartment passageway, 9. ...Freezer thermostat, 10.
...Damper, 10a...Damper thermo, 11...Air reservoir section.

Claims (1)

[Scope of utility model registration request] 1. A damper thermo is installed in the middle of the cold air passage in a cold air forced circulation type refrigerator/refrigerator in which a cold air passage is formed in the partition wall to send cold air to the refrigerator compartment. What is claimed is: 1. A refrigerator characterized in that an air reservoir is formed in the upper surface of the cold air passage in the vicinity of the discharge port to the refrigerator compartment. 2. In a refrigerator that has a cold air intake port on the front side of the freezer compartment of the partition wall and a cold air discharge port in the rear of the refrigerator compartment, and a damper thermo is arranged in the cold air passage formed at an angle in the partition wall. 1. The refrigerator according to claim 1, wherein an air reservoir is formed between the damper thermo section of the cold air passage and the cold air discharge port. 3. The refrigerator according to claim 1, wherein the cold air suction port of the cold air passage provided in the partition wall is formed near the cooler.