JPS6144140Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper thermostat used for controlling the temperature of a refrigerator such as a cold air forced convection refrigerator-freezer.

Generally, this damper thermostat is installed inside a refrigerator, and detects the temperature inside the refrigerator and automatically changes the degree of opening of the flaps according to the detected temperature to direct the air that has been heat-exchanged by the cooler into the refrigerator. The discharge amount is adjusted. However, under the operating condition of the refrigerator, that is, when the door is frequently opened and closed during hot and humid summer months, or when a humid load is stored inside the refrigerator, the cold air inlet surface is The humidity is low on the side, and the humidity is high on the cold air outlet side. Frost formation may occur on the cold air outlet side of the flap, which is cooled by cold air. Such frost formation and freezing may cause the flap to malfunction. Sometimes a situation occurred where the device did not work properly.

FIG. 1 shows a conventional example, which will be explained below.

Reference numeral 1 denotes a heat insulating box, which is divided into a freezer compartment 3 and a refrigerator compartment 4 by a partition 2, and a cooler 5 and a fan 6 for forced convection of cold air are disposed in the freezer compartment. The cold air sent through the air path duct 7 is then sent to a damper thermostat 8 disposed inside the refrigerator compartment 4.
The liquid is discharged into the refrigerator compartment 4 through. In addition, the cold air discharged to the freezer compartment 3 and the refrigerator compartment 4 is
It returns to the cooler 5 through a duct 9 provided in the. In such a configuration, if the inside of the refrigerator compartment 4 is used in a humid state, the damper thermostat 8
The upper surface side of the flap 10 becomes more humid than the lower surface side, and frost and icing occur on this surface, and when the cooler 5 is defrosted, the flap opening becomes large and the frost begins to melt, causing other problems. Water droplets come into contact with the structural parts of the flap 10 or flow downstream of the flap 10, and these water droplets refreeze during the cooling operation after defrosting, and the flap 10 becomes water droplets.
may not be able to close completely, causing problems such as the inside of the refrigerator becoming too cold.

The purpose of this invention is to improve the structure around the flap of the damper thermostat, with the aim of making it difficult for the flap of the damper thermostat to freeze or frost when the refrigerator is used in high humidity. This will be explained with reference to FIG. 2 showing one embodiment.

Note that illustrations and explanations of parts similar to those of the conventional example will be omitted, and only the damper thermostat will be explained.

Reference numeral 11 designates a damper thermostat, in which a flap 13 is installed outside the air passage 12, and this flap 13 controls the displacement of a bellows 15, which expands and contracts depending on the temperature of the internal temperature detection section 14, and has a gas sealed inside. The pushing-opening force of the rod pin 16 is transmitted and the spring 17 tries to close the flap 13.
The degree of opening is controlled by the closing force. Then, the upper end 1 of the flap 13
Reference numeral 8 denotes a hinge portion 1 formed integrally with the air passage outer cover 12.
It is rotatably supported at 9. 20 is a seal seat of the flap 13 which is arranged obliquely inside the air passage outside the air passage 12, and 21 is an opening. 22 is seal seat 2
This is a first slit provided in the longitudinal direction in the vicinity of the hinge portion 19 of 0. Further, 23 is a second slit provided in the flap 13 so as to extend in the longitudinal direction. They are arranged in positions that do not line up with each other.

In this configuration, when the flap 13 is opened, the cold air dehumidified by the cooler mainly flows into the seal seat 20.
The cold air flows through the opening 21 of the first
It reaches the upper surface side (refrigerator room atmosphere side) of the flap 13 via the slit 22 and the second slit 23, and flows along this surface. Therefore, even when the inside of the refrigerator is humid, the cool air dehumidified by the cooler will flow to the upper surface of the flap 13, and the humidity in the space on the upper surface side of the flap 13 will hardly increase even when the inside of the refrigerator is humid. Moreover, even if some frost may form on the upper surface of the flap, the effect of sublimating the frost by the dehumidifying cold air flow is also brought out. Further, the flow of cold air on the upper surface of the flap 13 can be further increased by making the locking portion 24 of the spring 17 of the flap 13 into a plate rib shape extending in the entire width direction of the flap 13.

As described above, the present invention provides a first slit in the seal seat of the flap of a damper thermostat in addition to the opening for cold air circulation, and also provides a second slit in the flap, and both slits are closed when the flap is fully closed. A flow of cold air also occurs on the inner side of the flap, which prevents frost from forming on the flap, which was a drawback of the conventional method, and prevents malfunctions.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional cold air forced convection refrigerator-freezer equipped with a damper thermostat, and FIG. 2 is a sectional view showing an embodiment of the present invention. 12...Air passage outside, 20...Seal seat, 21
... opening, 13 ... flap, 19 ... hinge section, 22 ... first slit, 23 ... second slit.

Claims (1)

[Scope of utility model registration request] A seal seat having an opening disposed obliquely in the outside of the air passage, and a flap that opens and closes the opening depending on the temperature and has one end supported by a hinge, and is located close to the hinge. A damper thermostat, wherein a first slit is formed in the seal seat, and a second slit is formed in the flap, which is not aligned with the first slit when the flap is fully closed.