JPH0438218Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement of a cold air supply amount control device for a refrigerator that controls the amount of cold air supplied to a storage compartment in a refrigerator by using a so-called damper thermostat.

[Technical Background of the Invention] Conventionally, refrigerators have been provided that employ a so-called damper thermo to control the amount of cold air supplied to a storage compartment within the refrigerator. This damper thermo is composed of a heat-sensitive tube filled with gas, a bellows that communicates with the heat-sensitive tube and expands and contracts due to changes in gas pressure based on the heat sensitivity in the heat-sensitive tube, a lever that responds to the bellows, and a lever that The damper is equipped with a damper that opens and closes,
By installing the heat-sensitive tube at a location where the temperature of the storage room can be detected, and on the other hand, installing a damper at the cold air supply port that opens toward the storage room, the cold air supply port can be opened and closed according to the temperature of the storage room. , to maintain the temperature of the storage room at a set temperature.

[Problems with the Background Art] However, in the conventional device described above, only one damper is provided for the cold air supply port, and therefore, the amount of opening thereof and the amount of cold air supplied per unit time are limited. However, there were also problems in that the cooling rate was slow and the cooling rate was slow. Conventionally, countermeasures for this have been to make the bellows larger or increase the number of folds in the bellows.
Efforts have been made to further lengthen the lever, but these methods have the problem of increasing costs and increasing the overall size.In particular, increasing the number of folds in the bellows makes it difficult to expand and contract the lever. If the amount is increased, there is a problem in that the life of the bellows is shortened.

[Purpose of the invention] The present invention was made in view of the above-mentioned circumstances, and its purpose is to reduce the amount of electricity per unit time without causing problems such as increased cost, increased overall size, or shortened lifespan. It is an object of the present invention to provide a practically excellent cold air supply amount control device for a refrigerator that can increase the amount of cold air supplied.

[Summary of the invention] The invention consists of a damper divided into a plurality of parts, a plurality of operation parts formed at the tip of the lever,
By bringing each of these operation parts into contact with each of the dampers,
The damper is characterized in that by opening and closing the plurality of dampers, the amount of opening thereof is increased overall.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings. In the figure, 1 is a storage room such as a refrigerating room or a freezing room in a refrigerator, 2 is a cold air supply port opening toward the storage room 1, and 3 is a cold air supply port 2.
This is a cold air supply duct that communicates with the On the other hand, numeral 4 is a bellows chamber installed in parallel with the cold air supply duct 3, and has a bellows 5 installed therein. Reference numeral 6 denotes a heat-sensitive tube connected to the bellows 5, which is filled with a gas, particularly a gas having a large coefficient of thermal expansion, and whose tip (not shown) faces the storage chamber 1 and is adapted to sense the temperature of the storage chamber 1. . Reference numeral 7 denotes a lever, one end of which is pivotally supported in the bellows chamber 4 by a support shaft 8 so as to be rotatable in the vertical direction in the figure. It is brought into contact from the middle and lower part. The lever 7 has an intermediate portion passed through a cavity 9 in the heat insulating wall, and a tip portion located at the cold air supply port 2, and the tip portion has first and second operating portions. Two operating protrusions 7a and 7b are formed. 10 is a damper, the first unit damper 1
0a and a second unit damper 10b, the first unit damper 10a is disposed on the right half of the cold air supply port 2 in the figure and is pivoted by a support shaft 11 so that it can be opened and closed. The back surface thereof is brought into contact with the tip of the first operation protrusion 7a of the lever 17, and the second unit damper 10b is disposed on the left half of the cold air supply port 2 in the figure and pivoted so as to be openable and closable by the support shaft 12. The lever 7 is supported so that its back surface is brought into contact with the tip of the second operating protrusion 7b of the lever 7.

Now, in the case of the configuration above, now,
If the temperature of storage room 1 is higher than the set value,
As a result, the gas pressure inside the heat-sensitive tube 6 and the bellows 5 increases, the bellows 5 is extended, and the lever 7 is pushed up, so that the damper 10 is also moved to the first unit damper 10.
a is pushed up by the first operation protrusion 7a, and the second unit damper 10b is pushed up by the second operation protrusion 7 and opened as shown by the two-dot chain line in the figure, and the cool air is sent through the cold air supply duct 3. The cold air is supplied from the right half and the left half of the cold air supply port 2 in the figure, respectively. Therefore, the temperature of the storage chamber 1 decreases and becomes a cooling state. When the temperature of the storage chamber 1 decreases in this way, the gas pressure inside the heat-sensitive tube 6 and the bellows 5 decreases, causing the bellows 5 to contract. Operation protrusion 7
Both first and second unit dampers 10 by a, 7b
The pushing up of a and 10b is released, and both of these unit dampers 10a and 10b return to the closed state. Therefore, the supply of cold air from the cold air supply duct 3 through the cold air supply port 2 is also cut off. If the temperature of the storage chamber 1 rises again as a result, both the first and second unit dampers 10a and 10b are opened in the same manner as described above to supply cold air, which further causes the temperature of the storage chamber 1 to rise. If the temperature decreases, the first and second unit dampers 10a and 10b are closed to stop the supply of cold air. By repeating the above steps, the storage chamber 1 is maintained at an appropriate temperature.

As described above, according to this embodiment, the damper 10 is divided into two unit dampers 10a and 10b, the first and second unit dampers 10a and 10b, each of which is opened and closed. Therefore, the cooling rate of the storage chamber 1 can be increased and the performance can be improved. Furthermore, in this case, the bellows 5 may be of the same size as the conventional one and does not need to be particularly large, and the lever 7 also does not need to be particularly large, so cost increase can be suppressed. It is also possible to suppress the overall size. Furthermore, there is no need to increase the number of folds in the bellows 5, so the amount of expansion and contraction can be kept small, and the service life can be maintained for a long time. In addition, regarding the configuration from the bellows 5 to both unit dampers 10a and 10b, the lever 7
It is only necessary to form the first and second operating protrusions 7a and 7b at the tip of the device, and there is no need for many other parts, which further reliably suppresses cost increase and overall size. be able to.

Incidentally, the damper 10 may be configured by being divided into more than two parts according to the size of the cold air supply port 2.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but may be implemented with appropriate modifications within the scope of the invention.

[Effects of the invention] As is clear from the above description, according to the invention, problems such as increased cost, increased overall size, and shortened lifespan of the so-called damper thermo structure cold air supply amount control device for refrigerators can be solved. This has excellent practical effects in that it is possible to increase the amount of cold air supplied per unit time without causing problems, and it is possible to achieve high performance.

[Brief explanation of the drawing]

The drawing is a sectional view of the main parts of an embodiment of the present invention. In the figure, 1 is a storage chamber, 2 is a cold air supply port, 3 is a cold air supply duct, 5 is a bellows, 6 is a heat-sensitive tube, 7 is a lever, 7a is a first operation protrusion (operation part), and 7b is a second operation part. operation protrusion (operation part), 10 is a damper, 10
a indicates a first unit damper, and 10b indicates a second unit damper.

Claims (1)

[Scope of utility model registration request] A heat-sensitive tube filled with gas, a bellows that communicates with the heat-sensitive tube and expands and contracts according to changes in gas pressure based on heat sensitivity in the heat-sensitive tube, a lever that responds to the bellows, and a damper that is opened and closed by the lever. The damper is configured to be divided into a plurality of parts, and a plurality of operation parts are provided at the tip of the lever. A cold air supply amount control device for a refrigerator, characterized in that the plurality of dampers are opened and closed by opening and closing the plurality of dampers by bringing each of the operation parts into contact with each of the dampers.