JPS6015235B2 - Refrigeration equipment with internal temperature display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigeration device, such as a refrigerator having an internal temperature display device, and in particular, to temporarily suspend the temperature display during and after defrosting to avoid unnecessary anxiety on the part of the user. Eliminate.

Generally, in this type of conventional example, the lighting of the optimum temperature deviation indicator lamp indicating an abnormality is interrupted during the defrosting operation and for a predetermined period of time after the defrosting is completed.

In this case, it is possible to determine the time after defrosting by setting the number of times the door is opened and closed during defrosting work or the increase/decrease in heat load, but it is extremely difficult to set the appropriate time and it is difficult to change the time. However, when it comes to household refrigerators, it is virtually impossible for the user to set the settings. In view of this, the present invention interrupts the internal temperature display during defrosting, so as not to cause unnecessary anxiety to the user, and until the cooling operation of the post-defrosting cycle has elapsed. By interrupting the display and then restarting the temperature display, the purpose is to obtain a display interruption time regardless of load fluctuations during defrosting. DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed explanation will be given below with reference to an electrical wiring diagram system circuit diagram of a refrigerator showing an embodiment of the present invention.

Reference numeral 1 denotes a compressor, and a cooler 2 for cooling the inside of the refrigerator, a blower fan motor 3, a condenser 4, a capillary tube 5, etc. are connected in an annular manner to form a cooling device 6.

Reference numeral 7 denotes a thermostat that controls the operation of the compressor 1 by detecting the temperature inside the refrigerator, for example, a freezer compartment (not shown).

8 is a defrost timer that integrates the operating time of the compressor 1 and energizes the defrost heater 9; 10 is a timer switch; 11
1 is a defrosting end thermostat, which together with the above-mentioned 8, 9, and 10 constitute a defrosting device 12.

Reference numeral 13 denotes an internal temperature display device, which includes an internal temperature detector 14 made of a thermistor and an indicator 15.

Reference numeral 16 denotes a display locking device for prohibiting the operation of the display device 13, which includes a flip-flop 17, a NOR circuit 18, a diode 19, a transistor 20, and a locking relay coil 21.

A signal of "1" is input to the set terminal 22 of the flip-flop 17 at the start of defrosting. A signal of "1" is input to the reset terminal 23 when the compressor 1 is in operation, and a signal of "0" is input when the compressor 1 is stopped. Further, one input terminal 24 of the NOR circuit 18 receives a signal of "1" when the compressor 1 is stopped, and a signal of "0" when the compressor 1 is in operation. Next, the operating state of the above configuration will be explained. The operation of the cooling device 6 is controlled by opening and closing the thermostat 7 to control the operation of the compressor 1 and the blower fan motor 3. At the same time, the operating time of the compressor 1 is accumulated by the defrost timer 8, and the operating time of the compressor 1 is accumulated by the defrost timer 8, time) has passed,
Connect the piece 10a of the changeover switch 10 from the contact 10b to the switch point 1.
Switching to 0c, the defrosting heater 9 is energized and defrosting operation is performed. Then, the defrosting thermostat 11 detects the completion of defrosting, the defrosting heater 9 is de-energized, and the defrosting is completed.
The compressor 1 is operated again and returns to cooling operation.
On the other hand, in the display lock device 16, a signal of "1" is input to the set terminal 22 of the flip-flop 17 with the start of defrosting.
A signal of “1” is output to the output terminal 25. This signal then turns on the transistor 20 via the diode 19, energizes the lock relay coil 21, closes the lock contact 2a, and interrupts the operation of the display device 13. At the same time, the defrost lamp 26, which indicates that defrosting is in progress, is turned on by the contact 21b. After that, when the defrosting is completed and the compressor 1 is restarted, the reset terminal 23 of the flip-flop 17 is set to "1".
A signal of "0" is input to the output terminal 25, and a signal of "0" is output from the output terminal 25. At the same time, since the compressor 1 is operating, a signal of "0" is input to one input terminal 24 of the NOR circuit 18, and its output becomes "1", which also turns on the transistor 20 and closes the lock contact 21a. The operation of the display device 13 is interrupted. Next, the operation of the compressor 1 after defrosting is stopped due to a drop in the temperature inside the refrigerator, and this causes the Noah circuit 1 to stop operating.
The input terminal 24 of 8 receives a signal of "1", and the NOR circuit 18
The output becomes "0", turns off the transistor 20, deenergizes the lock relay coil 21, closes the lock contact 21a, and restarts the operation of the display device 13.At the same time, the defrost indicator lamp 26 turns off. It is something that disappears.Therefore,
According to this configuration, the display interruption time can be reliably secured regardless of load fluctuations due to door opening/closing during defrosting, loading/unloading of articles, etc. As described above, the present invention provides a cooling device including a compressor, a cooler, etc. that cools the inside of the refrigerator, a defrosting device that removes frost from the cooler, a detector that detects the temperature inside the refrigerator, and a detector that detects the temperature inside the refrigerator. and a display lock device that prohibits the operation of the refrigerator temperature display device from the operation of the defrosting device until the end of one cycle of operation of the cooling device. Compared to conventional methods that interrupt the display for a predetermined period of time after defrosting, there is no need to set or change the interruption time, which is considered difficult, and the display can be adjusted appropriately against load fluctuations during defrosting. This is convenient because it ensures interruption time.

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram of a refrigerator showing an embodiment of the present invention.
FIG. 2 is a diagram of the refrigeration circuit. 1... Cooling device, 12... Defrosting device, 13...-
Internal temperature display device, 16...Display lock device. Figure 1 Figure 2

Claims (1)

[Claims] 1. A cooling device consisting of a compressor, a cooler, etc. that cools the inside of the refrigerator, a defrosting device that removes frost from the cooler, a detector that detects the temperature inside the refrigerator, and an indicator that displays the state of the temperature. and a display lock device that prohibits the operation of the refrigerator temperature display device from the operation of the defrosting device until the completion of one cycle of operation of the cooling device. Refrigeration equipment included.