JPS624854Y2 - - Google Patents

Description

[Detailed description of the invention] This invention prevents the temperature inside the refrigerator from rising and reduces power consumption by forming an air curtain at the entrance of the refrigerator when the door is opened and cutting off the flow of air between the inside and outside of the refrigerator. This is about a refrigerator that has become smaller.

Conventional refrigerators are structured so that when the door is opened, the cold air inside the refrigerator flows out and the warm air from outside the refrigerator flows into the refrigerator. The drawback is that a large amount of outflow of warm air and an inflow of warm air result in a large amount of electricity being consumed to maintain the temperature inside the refrigerator at the set temperature. In addition, after the cold air inside the refrigerator flows out and the warm air outside the refrigerator flows in, causing the temperature inside the refrigerator to rise, it takes a certain amount of time for the temperature inside the refrigerator to fall to the set temperature again, and during this time, the refrigerator is effectively The drawbacks were that the effectiveness was lost and the quality of the refrigerated products was likely to deteriorate.

The present invention aims to provide a refrigerator which eliminates the above-mentioned drawbacks by forming an air curtain at the entrance of the refrigerator when the door is opened to block the flow of air between the inside and outside of the refrigerator. Hereinafter, this will be explained based on an embodiment shown in FIGS. 1 and 2. 1 is the refrigerator body, 2 is the storage opening 1 of the refrigerator body 1.
A is a door attached to be openable and closable, and 3 is a handle fixed to the surface of the door 2. 4 is an elongated injection port provided along the lower edge of the storage opening 1a of the refrigerator main body 1;
Reference numeral 5 denotes an elongated suction port provided along the upper edge of the refrigerator opening 1a so as to face the injection port 4; Additionally, blowers 9 connected to the suction ports 5 through suction pipes 8 are attached to the handle 3 so that they are turned on when the user grasps the handle 3 and turned off when the user releases the hand. The first switch 11 for driving the blower, which is connected to the blower 6 via the lead wire 10, is attached to the right edge of the storage door 1a and is turned on when the user opens the door 2. This is a second switch for driving the blower connected in parallel to the first switch 9 and configured to turn OFF when closed.These switches 9 and 11 are wired as shown in FIG. 2A. When the door 2 is opened, the second switch 11 of the storage door 1a is turned on and the handle 3 is turned on. Even when the first switch 9 is turned off by releasing the button, the motor 6a continues to rotate. Further, when closing the door 2, the motor 6a stops after the door 2 is closed, the second switch 11 is turned off, and the handle 3 is released and the first switch 9 is turned off. Note that the first switch 9 and the second switch 11 may be either electronic or mechanical.

Since the proposed refrigerator is configured as described above,
First, when the user grasps the handle 3 to open the door 2,
The first switch 9 is turned ON, and the blower 6 is started and starts supplying air to the injection port 4 and starts suctioning air from the suction port 5. That is, as long as the handle 3 is grasped, even before the door 2 is opened, the blower 6 starts to form the air curtain which will normally be formed at least until the door 2 is closed. In this case, if the motor 6a of the blower 6 were controlled only by the second switch 11, the switch 11 would be turned on when the door 2 was opened.
After this, the motor 6a starts rotating. However, due to the inertia of the rotor of the motor 6a and the load on the blower 6, the motor 6a reaches a predetermined rotational speed.
It takes a certain amount of time to form an effective air curtain. Therefore, during this time, the cold air inside the refrigerator flows out of the refrigerator, resulting in an increase in the temperature inside the refrigerator. However, since the first switch 9 is connected in parallel with the second switch 11 (see Fig. 2A), when opening the door 2, by grasping the handle 3, the first switch 9 is first turned on and the motor 6a is turned on. Since it starts to rotate, an air curtain is already formed in front of the storage entrance 1a when the door 2 is opened. That is, by employing the two switches 9 and 11, the inconvenience that cold air inside the refrigerator flows out until an effective air curtain is formed due to the inertia of the motor 6a when the door 2 is opened can be completely eliminated. I am forced to do it. Then open door 2,
As shown in FIG. 1, air is immediately ejected in a band-shaped flow from the injection port 4 and sucked from the suction port 5, so that an air curtain is formed at the storage port 1a.
This blocks the circulation of air between the inside and outside of the refrigerator. Also, by opening the door 2, the second switch 11 is also activated.
Since it is turned ON, even if the user takes his hand off the handle 3 and the first switch 9 is turned OFF, the blower 6
continues to operate and the air curtain continues to form. That is, even if the user releases the handle 3, the second switch 11 connected in parallel with the first switch 9
After the door 2 is opened, the blower 6 is operated in place of the first switch 9, and the air curtain continues to be formed as long as the door 2 is opened. Therefore, even when the door is opened, cold air inside the refrigerator is prevented from flowing out of the refrigerator, and warm air from outside the refrigerator is prevented from flowing into the refrigerator. Next, the user grasps the handle 3 and closes the door 2.
When the switch is closed, the second switch 11 is turned off, but the first switch 9 is turned on again, so the blower 6
continues to operate and the air curtain is still held. In this case, even if the user closes the door 2 without grasping the handle 3 of the door 2, as is generally done, the second switch 11 will close the air that has been formed at least until the door 2 is completely closed. The blower 6 continues to operate to maintain the curtain. Finally, when the user releases the handle 3, the first switch 9 is also turned off, the blower 6 stops, and the air curtain disappears. In this way, even if the door 2 is opened and closed frequently, the refrigerator according to the present invention prevents the cold air inside the refrigerator from flowing out of the refrigerator and the warm air from outside the refrigerator from flowing into the refrigerator, so that the temperature inside the refrigerator remains constant. It doesn't rise. Therefore, the refrigerating effect is not lost even temporarily, and deterioration of the quality of the refrigerated products is prevented. Further, for the same reason, the electric power required to maintain the temperature inside the refrigerator at the set temperature is extremely small, which is economical.

In the above embodiment, the injection port 4 and the suction port 5 are provided at the lower and upper edges of the storage opening 1a so as to face each other. As in the second embodiment, the injection port 12 and the suction port 13 may be provided at the right edge and the left edge of the storage opening 1a so as to face each other, respectively. Further, as in the third embodiment shown in FIG. 4, the injection port 4 and the suction port 5 are provided at the lower edge and the upper edge of the storage port 1a so as to face each other, and the right edge of the storage port 1a is provided. The injection port 12 and the suction port 13 may be provided at the left edge and the left edge, respectively, so as to face each other.

As described above, the refrigerator according to the present invention has important practical advantages in that the temperature inside the refrigerator is prevented from increasing due to opening and closing of the door, and power consumption is extremely low.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the refrigerator according to the present invention, Fig. 2 is a vertical sectional view of the above embodiment, Fig. 2A is an electrical wiring diagram of the above embodiment, and Figs. FIG. 3 is a perspective view of a second embodiment and a third embodiment. 1... Refrigerator body, 1a... Door, 2... Door,
3...handle, 4...injection port, 5...intake port, 6...
...Blower, 7...Blow pipe, 8...Suction pipe, 9...
First switch, 10...Lead wire, 11...Second switch.

Claims (1)

[Scope of utility model registration request] A refrigerator body, a door attached to the refrigerator body so as to be openable and closable, at least a pair of air injection ports provided oppositely at the refrigerator entrance to form an air curtain at the refrigerator entrance when the door is opened; an air intake port, a blower disposed within the refrigerator body and connected to the air injection port on its injection side and to the air intake port on its suction side, and attached to the handle of the door. a first switch means which is turned ON to start the blower when the handle is grasped to open the door; and second switch means that is turned on to drive the blower when the refrigerator is opened.