JPS60263069A - Controller for operation of refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to operation control of a refrigerator.

Conventional structure and its problems Traditionally, refrigerator operation control involves integrating the operating time of the compressor or detecting the amount of frost in the cooler, and defrosting when the operating time or amount of frost reaches a certain level. defrosting was started, and defrosting was completed after detecting an increase in the temperature of the cooler. Then turn the compressor to 5oHz or eoH.
It operated at the commercial frequency of Z. This is the third
To explain the conventional example with reference to the solid line of the internal temperature characteristics in the figure,
After the defrosting start A reaches the defrosting end B, it takes T1 for the internal temperature to cool down sufficiently after the compressor starts operating.
This method has the drawback that it takes a long time, and during that time the food placed in the refrigerator is kept at a high temperature and the temperature rises.

Purpose of the Invention Therefore, the object of the present invention is to reduce the temperature rise of food placed in the refrigerator by cooling the temperature inside the refrigerator in a temperature trench during normal operation within a predetermined period of time after the end of defrosting. It is.

Composition of the Invention In order to achieve this object, the present invention operates a variable speed compressor at a rotation speed higher than the rotation speed of the compressor using commercial power after defrosting is completed, thereby reducing the temperature inside the refrigerator to the level during normal operation in a short period of time. The temperature rise of food that has been cooled down to temperature and placed in the refrigerator is scrapped.

Description of examples An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an internal temperature detection means for detecting and transmitting the internal temperature of the refrigerator. Reference numeral 2 denotes a set temperature detection means that detects and sends out what temperature the inside temperature of the refrigerator is set to.

3 integrates the operating time of the compressor 4, and
Defrosting start detection means detects the amount of frost (not shown) and sends a defrosting start signal when the amount of frost reaches a certain time or a certain amount of boxes. Reference numeral 6 denotes a defrosting end detection means that detects the temperature rise of the cooler during defrosting and sends out an output when the temperature exceeds a set temperature. 6 is a control means having input terminals I0, 11 . I2. I
3, respectively, and an internal temperature detecting means 1. Set temperature detection means 2° Defrosting start detection means 3. It is connected to the output of the defrosting completion detection means 6. It has output terminals 0° and 01. The output o0 is connected to an operation control means 7, such as a transistor inverter, which outputs a rotational speed signal for the operation of the compressor 4, and the operation control means 7 operates the compressor 4 based on commands from the control means 6. . Further, the output 01 is connected to a relay 8 that is turned ON during defrosting to supply AC power to the heater 9, and is turned OFF during times other than defrosting. 10 is a timer and the defrosting end detection means 6
It operates for a certain period of time after detecting the end of defrosting and sending out an output.

The operation of the above configuration will be described below based on the 70-chart in FIG. 2 and the dashed line of the internal temperature characteristic in FIG. 3.

In one step, the output of the chamber temperature detection means 1 is input to the control means 60 input terminal I. Enter more information. Next, in step 2, the output of the set temperature detection means 2 is input to the input terminal 11 of the control means 6. Next, in step 3, the internal temperature input in steps 1 and 2 is compared with the set temperature, and in step 4, the frequency determined by comparison is outputted to operation control means 7 from output terminal O0. Then, the compressor 4 is operated at the frequency determined by the operation control means 7. This determined frequency changes so that the internal temperature equals the set temperature.

Next, at step 6, the output of the defrosting start detection means 3 is inputted to the input terminal I3 of the control means 60, and it is determined whether or not deregistration has started. If the start of defrosting is not detected, the process returns to step 1 and the above loop is repeated. As soon as the start of removal from the register is detected, the process proceeds to step 6, and the control means 6 sends an OH signal to the operation control means 7.
Output the output of z to relay 8 from send 01,
Turn on the heater 9 and start defrosting (Fig. 3A)
point).

Next, in step 8, the output of the defrosting end detection means 4 is inputted to the input terminal (2) of the control means 7, and it is determined whether the defrosting end signal is being sent out.If it is not being sent out, step 6→7 The loop of step → 8 steps is repeated until the defrosting end signal is sent and at 9 steps, the output of the output terminal 01 of the control means 6 is stopped and the relay 8 is turned on.
Turn off the heater 9 and proceed to step 10 (point B) in Figure 3.

Then, in step 1o, the timer 1o is started, and then in step 11, the control means output to the operation control means child that the operating frequency of the compressor 4 is the highest frequency, and the operation control means 7 operates the compressor 4 at the highest frequency. Next, in step 12, it is determined whether the timer 10 has reached the set time, and if it is not the set time, the process returns to step 11, and from step 11 to
Repeat the 2-step loop. If it is the set time, proceed to step 13 and clear the timer 10 (3rd step).
Figure point C). Then, returning to step 1 and repeating the above operation, the control means 6 determines the operating frequency of the compressor 4 based on the difference between the internal temperature and the set temperature.

Therefore, the temperature inside the refrigerator is cooled to the temperature during normal operation 12 hours after the end of defrosting, and the effect of reducing the temperature rise of the food placed in the refrigerator can be obtained.

Effects of the Invention As is clear from the above explanation, the present invention is provided with a control circuit that operates the compressor at least at a higher rotation speed than the rotation speed of the compressor by the commercial power supply after the completion of defrosting. The temperature inside the refrigerator is quickly cooled by temperature control during normal operation, and the effect of eliminating the rise in temperature of food placed in the refrigerator can be obtained.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the refrigerator operation control device of the present invention, Fig. 2 is a flowchart explaining the invention in detail, and Fig. 3 is an internal temperature characteristic showing changes in internal temperature. It is a diagram. 1... Internal temperature detection means, 2... Preset temperature detection means, 3... Defrosting start detection means, 5...
... Defrosting end detection means, 6... Control means, 7.
...Operation control means.

Claims (1)

[Claims] An internal temperature detecting means for detecting the internal temperature of the refrigerator, a set temperature detecting means for detecting the set temperature inside the refrigerator, a defrosting start detecting means for detecting the start of defrosting and outputting a defrosting start signal,
a defrosting end detection means that detects a temperature rise in the cooler and outputs a termination signal to end defrosting; an operation control means that operates the compressor at a desired rotation speed; the chamber temperature detection means; and the set temperature detection means. and a control means for sending the operating rotation speed to the operation control means based on the respective inputs of the defrosting start detection means and the defrosting end detection means, and further for starting defrosting. An operation control device for a refrigerator that operates the compressor at a higher rotation speed than the rotation speed of the compressor by a power source.