JPS6238209Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator in which a cavity for high-frequency heating is disposed within the refrigerator compartment.

In the conventional technique described in Japanese Utility Model Application Publication No. 53-153567, which precedes the present invention, a hinge lever is fixed to the opening/closing fulcrum of the thawing chamber door, and the hinge lever separates from the switch at the same time as the thawing chamber door begins to open. By turning off the lever switch, the high frequency generator is stopped.

However, in this type of conventional technology, the high frequency generator is configured to stop after the thawing chamber door begins to open, so if there is a variation in the positional relationship between the hinge lever and the switch, the high frequency generator is activated. The disadvantage is that the device stops at a later point after the door opening gap has been created, resulting in radio wave leakage from this door opening gap.Also, even if the high frequency generator stops immediately before the door opening gap occurs, reflections inside the thawing chamber may occur. There are drawbacks such as the radio waves in the middle of attenuation leaking through the gap when the door is subsequently opened, and the switch is used only to stop the high frequency generator, so the number of parts increases due to this switch.

The present invention solves the above-mentioned drawbacks, stops the high-frequency generator before the door of the high-frequency heating chamber starts moving, and even before the heating chamber door is touched by the user's hand, thereby eliminating the risk of radio wave leakage, and eliminating the risk of radio wave leakage. By using the generator stop switch as another switch, the number of parts can be reduced.

Next, one embodiment of the present invention will be described.

Reference numeral 1 denotes a refrigerator body, and the inside of the refrigerator is divided vertically into a freezing compartment 3 and a refrigerating compartment 4 by a partition wall 2. Also 5
is a machine room located at the bottom of the refrigerator body 1 that houses the compressor 6 and the like. Reference numeral 7 designates a freezer compartment door that closes the front opening of the freezer compartment 3, and 8 designates a refrigerator compartment door that has a pocket 8a inside and closes the refrigerator compartment 4. Reference numeral 9 is a container provided at the lower part of the refrigerator compartment 4, which is one of the storage compartments, for storing vegetables and the like. Reference numeral 10 denotes a cooler installed in a cooling chamber 11 formed between the partition wall 2 and the bottom wall 3a of the freezing chamber 3. Air cooled by the cooler 10 is passed through a duct 13 by an electric blower 12. The cold air is then sent to the freezer compartment 3, and is blown to the refrigerator compartment 4 from a cold air outlet 14 having a damper device (not shown) to cool the inside of the refrigerator. 15 is an ice making device provided near the cold air outlet of the duct 13.

Now, 16 is a cavity that forms a high-frequency heating chamber in which frozen food can be thawed using high-frequency waves, and is located in the upper part of the refrigerator compartment 4 in front of the cold air outlet 14, and a radio wave stirring chamber 17 is provided in the lower part. There is. Reference numeral 18 denotes a high frequency generator consisting of a magnetron oscillator 19 and a magnetron power supply 20, which is installed along with the cooling fan 21 of the compressor 6 in this embodiment on a compressor stand 22 in the machine room 5, in line with the compressor 6 of the refrigeration system. The high-frequency generator 18 is connected to the above-mentioned heating chamber 16 in the radio stirring chamber 17.
A waveguide circuit 23 is provided to send radio waves through the .

24 is a cooking plate molded with an open top surface made of resin with a low dielectric constant, which is inserted through the opening of a cavity formed of a high-frequency radio wave reflecting material such as metal, and a heating chamber door including a handle in the front part. 25 is installed.

In the electric circuit diagram of FIG. 2, the high frequency generator 18 is connected to the secondary side circuit 27 of the transformer 26, and the timer 28 for setting cooking time and the blower motor 29 etc. are connected to the primary side. A cooking switch 30 whose opening and closing are controlled by the timer 28 is connected in series to the transformer 26. A safety switch 31 is connected in series to the transformer 26 at a stage before the cooking switch 30, and is closed when cooking is possible, such as when the cooking plate 24 is housed in a fixed position in the cavity 16. 32 is the refrigerator compartment 4
A door switch that opens and closes in response to the opening and closing of the refrigerator compartment door 8 that closes the front opening of the safety switch 3.
1 and is connected in series to the primary side of the transformer 26. The door switch 32 is connected in series not only to the transformer 26 but also to the blower motor 29. One end of a refrigerator control circuit 33 equipped with an electric blower 12 and an interior light (not shown) is connected between the door switch 32 and the safety switch 31, and this control circuit 33 is connected in parallel with the transformer 26. . 34 is a lamp for illuminating the inside of the cavity 16, 35 is a power source, and 36 is a fuse.

Since the present invention is configured as described above, by simply opening the refrigerator compartment door before opening the heating compartment door, the operation of the high frequency generator is stopped by the door switch, and therefore, the user can close the heating compartment door. It is possible to stop the operation of the high frequency generator before it is touched, eliminating concerns about radio wave leakage. In addition, even if the refrigerator compartment blower motor stops when the refrigerator compartment door is opened and the flow of cold air near the cavity stagnates, the door switch also stops the high-frequency generator, so the air in the vicinity of the cavity suddenly stops. This can prevent the top wall of the inner box from becoming deformed due to high temperatures. Furthermore, since the door switch also serves as a stop switch for the high frequency generator, the number of parts and manufacturing cost can be reduced by the amount of the door switch.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view of the refrigerator of the present invention, and FIG. 2 is a schematic electrical circuit diagram thereof. 4... Refrigerator room, 8... Refrigerator door, 16... Cavity, 18... High frequency generator, 25... Heating chamber door, 26... Transformer, 29... Blower motor, 32... Door switch, 35... …power supply.

Claims (1)

[Scope of utility model registration request] A cavity forming a high-frequency heating chamber to which high-frequency radio waves from a high-frequency generator are supplied is provided in the refrigerator compartment, and a front opening of the cavity is closed with a heating chamber door, and the front opening of the refrigerator compartment is closed. A door switch that is activated when the refrigerator compartment door is opened and closed is connected to a power source in series with each of the step-up transformer of the high frequency generator and the refrigerator compartment blower motor, and the door switch operates to operate the high frequency generator and the refrigerator compartment door. A refrigerator characterized in that the blower motor for the refrigerator compartment is configured to stop when the front opening of the refrigerator compartment is opened.