JPH0271071A - Controller for cooling chamber - Google Patents

Abstract

PURPOSE:To suppress varying range of a temperature in a cooling chamber, and to improve the preservation of a material to be cooled by starting the operation of a refrigerating cycle when a door is opened during the stop of the cycle. CONSTITUTION:When a set temperature (t) is set, the stopping temperature Toff and operating temperature TON of a refrigerating cycle are automatically set. When a detection temperature TS of a temperature detector becomes the temperature TON or higher, a compressor and a motor-driven blower are started to cool in a cooling chamber. When a door 2 is opened during the stop of the cycle, 'is door opened' is judged with a flag '0', 'YES' is processed, and it is altered to flag '1'. 'whether detection temperature TS is stopping temperature Toff or lower' is judged, and 'NO' is processed with TS>Toff. 'whether flag=1?' is judged, 'YES' is obtained, and the cycle is started. Accordingly, when the door is opened, the cycle is operated even during the stop of the cycle to suppress the rise of the temperature in the cooling chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a control device for opening and closing a door of a refrigerator equipped with a door.

B)) Prior Art As a technology prior to the present invention, there is a temperature control device for a refrigerator described in Japanese Utility Model Publication No. 17098/1983. The temperature control device described in the publication is designed to stop the operation of the electric blower for circulating cold air in the refrigerator in conjunction with the opening and closing of the door; the opening and closing of the door does not control the electric compressor. .

As a result, regardless of whether the refrigerator's refrigeration cycle is stopped or in operation, if the door is open, the refrigeration cycle is stopped and the temperature inside the refrigerator does not rise rapidly.
The range of change in the temperature inside the refrigerator is large, and it cannot be considered to be suitable for controlling the range of change in the temperature inside the refrigerator in recent years to improve the preservation of food.

(c) Problems to be Solved by the Invention The present invention provides a refrigerator which is capable of stably storing refrigerated items by reducing the range of change in temperature inside the refrigerator due to opening and closing of the door. The technical challenge is to provide a control device.

B) Means for Solving the Problems The present invention controls the refrigeration cycle to stop in a control unit based on a signal from a temperature sensor that detects the temperature inside the refrigerator, and approximates the temperature inside the refrigerator to a set value. The temperature is maintained, the opening/closing of the door of the refrigerator is detected by the door opening/closing detector, and while the refrigeration cycle is stopped, the opening/closing of the door is detected by the door opening/closing detector, and the refrigeration cycle is started at 9 o'clock. The problem is solved by means.

(E) Function The present invention suppresses the rise in temperature inside the refrigerator due to the leakage of cold air from inside the refrigerator when the door body is opened by operating the refrigeration cycle.

(f) Example The configuration of the present invention will be specifically explained based on the drawings.

FIG. 4 is a perspective view of the cooling unit 911, FIG. 5 is a partial perspective view of the cooling nobo 1 with the door body 2 open, and FIG. Figure 2 is a schematic diagram showing the refrigeration cycle and control circuit of the refrigerator 1, Figure 1 is a flowchart showing the operation of the refrigerator 1, and Figure 5 is a characteristic diagram showing changes in the internal temperature of the refrigerator 1. It is.

The refrigerator 1 is completely equipped with a heat insulating box body 4 having a front opening and a door body 2 for opening and closing the front opening of the heat insulating body 4. Insulated box body 4
A compressor 5 forming a refrigeration cycle, a condenser 6, a dryer 7, a capillary tube 8, and a shade generator 9 are disposed at predetermined locations inside and outside the refrigeration cycle. The evaporator 9 installed in the insulation box 4 is located in the cooling passage 10, and the cold air passage 10 is equipped with a t-movement blower 11.
has been set up.

A door opening/closing detection body 3 for detecting opening/closing of the door body 2 is formed of a switch and is attached to the opening edge of the heat insulating box body 4. A temperature sensor 12 for detecting the temperature inside the refrigerator is installed inside the refrigerator of the heat insulating object 4. Refrigeration cycle compressor 5 and electric blower 1
1 is stopped and controlled by the control unit 15 based on signals from the door opening/closing detector 6 and the temperature detector 12.

The internal temperature of the refrigerator 1 is appropriately set by the temperature setting section 14, and the set temperature t (=displayed on the display section 15.The display section 15 also displays the value detected by the temperature sensor 12). The display @15 is also used to display the operating status and abnormalities of the refrigerator 1.When the set temperature t is set, the stop temperature Toff and the operating temperature TON of the refrigeration cycle are displayed.
is set in a self-mocking manner. When the temperature Ts detected by the temperature sensor 12 becomes equal to or higher than the operating temperature 'l'QN, the operation of the compressor 5 and the rock 11 are started to cool down the inside of the refrigerator, and the detected temperature Ts becomes the stop temperature Tof! When the temperature is below, the operation of the compressor 5 and the electric blower 11 is stopped, and the temperature inside the refrigerator changes according to the initial curve of the characteristic diagram shown in FIG.

The stop temperature Toff and the operating temperature Thi with respect to the set temperature t. The temperature difference between Q and N is approximately 5°C.

△ The operating operation of the refrigerator 1 will be described in detail based on FIG. 1.

When the operation starts, the 7 lag is set to "1", it is determined whether "is the flag -1", the rYEsJ process is performed, and it is determined whether "the detected temperature Ta is equal to or lower than the stop temperature Toff". If the detected temperature Ts is lower than the stop temperature Toff, the rYEsJ process is performed and the flag is set to "0". Next, it is determined whether the flag is 1, and since it is NO, the n open/close detector 6 determines whether the door is open, and if it is NO, the refrigeration cycle is stopped. Then, it is determined whether the flag is -1. At this time, "Flag-
0", so when rNOJ is processed, it is determined whether "detected temperature Ts is equal to or higher than operating temperature ToN", and "N
If it is "O", the same process as above is performed, and the refrigeration cycle is stopped, and it is again determined whether "detected temperature Ts is equal to or higher than the operating temperature TON. If it is rYEsJ, it means that the temperature inside the refrigerator has increased. The flag is changed to "1", rYEsJ is processed based on the determination of "flag -1", and the refrigeration cycle is operated. The repetition of the above operation is the operation when the door body 2 is closed.

Next, when the door body 2 is opened during operation of the refrigeration cycle,
Since the detected temperature T3 does not easily become equal to or lower than the stop temperature Toff, the refrigeration cycle continues to operate even while the door body 2 is open, thereby suppressing a rapid temperature rise due to the opening of the door body 2.

If the door body 2 is opened while the refrigeration cycle is stopped, at this time,
Since the flag is "0", it is determined whether "the door is open", rYgsJ is processed, and the flag becomes "1".
' will be changed to '. When the flag is changed to "1", it is determined whether "the detected temperature Ts is below the stop temperature To//", and as shown in FIG. 3, since <, Ts>Toff, " “NO” is processed, and “Flag No. 1” is processed.
Answer ``YESJ'' and the refrigeration cycle will start operating.

Therefore, when the door body 2 is opened, even if the refrigeration cycle is running, the operation is started and the temperature rise inside the refrigerator is suppressed. The reason why the temperature inside the refrigerator decreases at the initial stage when the door body 2 is opened in Fig. 6 is because the opening area of the door body 2 gradually increases.When the opening area is small, the refrigeration cycle This is because the cooling capacity due to operation is limited.

When the door body 2t is closed, the flag is set to "1", so until the detected temperature T3 becomes the stop temperature To// or less,
The refrigeration cycle continues to operate.

For control when the door body 2 is opened while the refrigeration cycle is stopped and the refrigeration cycle is operated, set the flag to "
1" and transition to normal cooling operation,
The refrigeration cycle may be controlled to operate only for a certain period of time, and the certain period of time may be set in advance.
It may be automatically set in proportion to the time that the door body 2 is open.

Further, although the refrigerator 1 is equipped with an electric blower 11, it can also be used for a refrigerator 1 that is not equipped with a semi-dynamic blower 11 for cooling the inside of the refrigerator.

(G) Effects of the Invention According to the present invention, when the door body is opened while the refrigeration cycle is stopped, the operation of the refrigeration cycle is started, suppressing the rise in the temperature inside the refrigerator and reducing the period of change in the temperature inside the refrigerator. , the preservation of objects to be cooled is improved.

[Brief explanation of the drawing]

The figures show the present invention, and Fig. 1 is a 70-chart, Fig. 2 is a schematic circuit diagram, Fig. 3 is a characteristic diagram, Fig. 4 is a perspective view of a refrigerator, and Fig. 5 is a perspective view of main parts. FIG. 6 is a side view of the door opening/closing detector. 1... Refrigerator, 2... Door body, 5... Door opening/closing detector, 5... Compressor, 12... Temperature detector,
15...control unit

Claims (1)

[Claims] 1. A temperature sensor that detects the internal temperature of the refrigerator, a door open/close sensor that detects the opening and closing of the door of the refrigerator, and a stoppage of the refrigeration cycle based on signals from the temperature sensor and the door open/close sensor. A control device for a refrigerator, comprising a control unit for controlling the refrigerator, and operates the refrigeration cycle when the opening of the door body is detected by a door opening/closing detector while the refrigeration cycle is stopped.