JPH02233956A - Controller device for show case - Google Patents

Abstract

PURPOSE:To provide an automatic changing-over of an operation at night and enable an energy saving to be attained by a method wherein a control over the night operation stored in a control memory means is started or cancelled through a first switch and a second switch. CONSTITUTION:This control device is comprised of a first switch 11 and a second switch 12 for starting and cancelling an operation at night, a control memory means 23 having inputs of signals from the first switch and the second switch, control temperature setting means 14 and 17 for setting a control temperature within a housing, a control temperature determining means 19 having as its input signals from the control memory means and the control temperature setting means, a temperature sensing means 18 for sensing the housing temperature, a comparator means 20 having inputs of signals from the control temperature determining means and the temperature sensing means and a control means 21 having as its input the signal from the comparator means so as to control a load for the compressor. With such an arrangement above, the control for the night operation stored in the control memory means 23 can be started or cancelled by the first switch 11 and the second switch 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for controlling the temperature inside a showcase or the like.

BACKGROUND OF THE INVENTION In recent years, several types of electronically controlled temperature control systems have been used in showcases and the like.

An example of the conventional control device for a showcase or the like mentioned above will be described below with reference to the drawings.

FIG. 3 is a block diagram of a conventional control device for a showcase, etc., and FIG. 4 is an operation flowchart of the conventional control device for a showcase, etc.

In FIG. 3, 1 is a temperature detection means for detecting the temperature inside the refrigerator, and 2 is a control temperature setting means for setting a control temperature target value inside the refrigerator. Reference numeral 3 denotes a comparison means into which signals from the temperature detection stage 1 and the control temperature setting means 2 are input. Reference numeral 4 denotes a control means which inputs the signal from the comparison means 3 and controls the load 6.

The operation of the controller for a showcase or the like constructed as described above will be explained below using the operation flowchart shown in FIG.

First, when the power is turned on, in step 1, a signal from the control temperature setting means 2 is input to the comparison means 3 (hereinafter referred to as temperature setting t). Next, in step 2,
The signal from the temperature detection means 1 is input to the comparison stage 3 (hereinafter, the temperature at this time will be referred to as the internal temperature t1). Next, in step 3, the comparison circuit 3 compares the set temperature 70 with the internal temperature t1, and if formula (1) is satisfied, the load is transferred to ONL step 1 in step 4, otherwise In step 4, the load is turned off and the logic is returned to step 1.

to<t1 ・・・・・・・・・・・・(1
) Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, due to the set temperature t0 set by the control temperature setting means 2, both night and night operation are repeated, and the night time when the load is light with few door openings and closings, etc. In this case, it is disadvantageous in terms of energy saving. In addition, as a means to achieve energy saving at night, the set temperature t is set only at night. It is possible to raise the
If the user forgets to return the temperature to the preset temperature, the temperature inside the refrigerator will rise.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a control device for a showcase, etc., which automatically switches the operation mode at night and is effective for energy saving.

Means for Solving the Problems In order to achieve this object, the control device for a showcase or the like of the present invention has a first controller for starting and canceling night driving, respectively.
a switch and a second switch, a control storage means receiving the signals of the first switch and the second switch, a control temperature setting means for setting a control temperature in the refrigerator, and a control storage means and a control temperature A control temperature determining means which receives a signal from the setting means, a temperature detecting means which detects the internal temperature, a comparing means which receives signals from the control temperature determining means and the temperature detecting means, and a signal from the comparing means. It has a configuration in which it receives as an input and includes a control means for controlling the load of the compressor and the like.

Function: With this configuration, the night driving control stored in the control storage means can be started and canceled by the first switch and the second switch.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a control device for a showcase or the like according to an embodiment of the present invention, and FIG. 2 is an operation flowchart of the control device for a showcase or the like according to an embodiment of the present invention.

In FIG. 1, 11 is the first button for inputting the start of night driving.
The switch 12 is a second switch for inputting the cancellation of night driving. Reference numeral 13 denotes switch input determination means, into which signals S1 and S2 from the first switch 11 and the second switch 12 are input.

14 is a night control temperature setting means with 1,000 steps of switch input judgment.
The signal S3 from 3 is input. 15 is a 24-hour timer which inputs the signal S4 from the switch input determination means 13. 16 is a timer and the signal S from the 24 hour timer 15
Enter 6. In the above, the switch input determination means 13, the nighttime control temperature setting means 14, the 24-hour timer 16, and the timer 16 are referred to as the control storage means 23. 17 is a control temperature setting means for setting a control target temperature inside the refrigerator, and 18 is a temperature detection means for detecting the temperature inside the refrigerator. Reference numeral 19 denotes a control temperature determining means, which receives signals Ss and 19 from the nighttime control temperature setting means 14, the control temperature setting means 17, and the timer 16, respectively.
Input S7, Ss. Reference numeral 20 denotes a comparison means into which signals S9 and S10 from the control temperature determining means 19 and the temperature detecting means 18 are respectively input. 21 is a control means which inputs the signal S11 from the comparison stage 20 and sends the signal S11 to the load 22.
Outputs 12.

The operation of the control device for the seam-case constructed as described above will be explained below using the operation flowchart shown in FIG.

First, when the power is turned on, in step a, a signal S7 is input from the control temperature setting stage 17 to the control temperature determining means 19 (hereinafter referred to as normal control temperature t2). Next, in step b, the switch input determining means 13 determines whether or not the first switch 11 is turned on.
If 1 is turned on, the logic advances to step C; otherwise, the logic advances to step k.

In step C, the signal S4 from the switch input determination means 13 is input to the 24-hour timer 15, and from the time when the first switch 11 is turned ○N, the 24-hour timer 1
Start counting 6 and advance the logic to step d. In step d, the signal S6 is input from the 24-hour timer 16 to the timer 16, the timer 16 starts counting, and the logic advances to step e. step e
, the signal S3 is input from the switch input determination means 13 to the nighttime control temperature setting means 14, and the control temperature (hereinafter referred to as nighttime control temperature t3) stored in advance in the nighttime control temperature setting means is set as the control temperature. Determination means 1
9, the nighttime control temperature t3 is determined as the control temperature, and the comparison means 2Q compares the signal S1o from the temperature detection means 18 and the signal S9 from the control temperature determination means 19.
(nighttime control temperature 13), outputs the result to the control means 21, and sends a signal S12 to the load 22 from the control means 21.
is output to control the load 22. This is hereinafter referred to as night driving mode.

Next, in Nutep f, the switch input determination means determines whether or not the second switch 12 is ONI.
If switch 12 is turned on, step! , otherwise proceed to step q.

Nutep q determines whether the count of the timer 16 has reached a predetermined count, and if so, resets the count of the timer 16, returns to step h, otherwise returns the logic to step e.

In Nutep h, the timer 16 outputs the signal S8 to the control temperature determining means 19, and the normal control temperature t2 is determined as the control temperature, and the comparing means 2o compares the signal S1o from the temperature detecting means 18 with the control temperature determining means 19. The result is output to the control means 21, and the control means 21 controls the load 22.
It outputs a signal S12 to control the load 22. This is hereinafter referred to as normal operation mode. Then proceed with the logic to Nutep a.

In step l, the switch input determining means 13 inputs the signal S4 to the 24-hour timer 15, the count of the 24-hour timer 15 is reset, and the logic advances to step j. Next, in step j, the signal S6 is input from the 24-hour timer 15 to the timer 16, the count of the timer 16 is reset, and the logic advances to step h, where the normal operation mode is entered.

In step k, if the second switch 12 is ONI in the switch input determination means 13, then go to step l;
Otherwise, the logic proceeds to step l.

In step l, it is determined whether or not the 24-hour timer 16 is counting up. If it is counting up, the 24-hour timer 16 is reset in step m and the logic goes to step C. Otherwise, the logic is Proceed to step h and enter the normal operation mode.

As described above, the first switch 11 and the second switch 12 for inputting the start and cancellation of night driving, and the first switch 1
The signals of the first and second switches 12 are input. Control memory 1,000 stages 23, control temperature setting means 17, and control memory means 2
3 and the control temperature determining means 19 which receives the signals from the control temperature setting means 17 as inputs, the first switch 11
The second switch 12 allows you to easily start and cancel night driving, and the 24-hour timer 15 and timer 16 in the control memory 23 automatically start night driving every day once you start night driving. It is now possible to release the door at night, when there are few door openings and closings.
', operation can be easily performed, and the risk of an increase in temperature inside the refrigerator due to forgetting to switch to normal operation in the living room can be eliminated.

．． Effects of the Invention As described above, the present invention provides a first switch and a second switch for starting and canceling night driving, respectively, a control storage means that receives signals from the first switch and the second switch, a control temperature setting means for setting a control temperature inside the refrigerator; a control temperature determination means receiving signals from the control storage means and the control temperature setting means; a temperature detection means for detecting the temperature inside the refrigerator; and a control temperature determination means for detecting the temperature inside the refrigerator. a comparison means which receives as input signals from the means and the temperature detection means; and a signal from the comparison means as input;
By providing a control means for controlling the load of a compressor, etc., it is possible to realize a control device for a showcase, etc., which is effective for energy saving and can automatically switch the operation mode at night by inputting a switch. be.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control device for a showcase, etc. in an embodiment of the present invention, FIG. 2 is an operation flowchart of a control device for a showcase, etc. in an embodiment of the present invention, and FIG. 3 is a conventional showcase. A block diagram of a control device such as
FIG. 4 is an operation flowchart of a conventional control device such as Shogane. 11...first switch, 12...second switch, 23...control storage means, 17...
... Control temperature setting means, 18 ... Temperature detection means, 19 ... Control temperature determining means, 20 ...
... Comparison means, 21 ... Control means. Name of agent: Patent attorney Shigetaka Awano and one other person Yamato Refrigeration Industry, 2-3-13 Azuchi-cho, Manchuo-ku Yamato Refrigeration Industry, 2-3-13 Azuchi-cho, Manchuo-ku

Claims (1)

[Claims] A first switch and a second switch for starting and canceling the night operation, respectively, a control storage means receiving signals from the first switch and the second switch as input, and a control temperature setting for setting a control temperature inside the refrigerator. and a control temperature determining means that receives signals from the control storage means and the control temperature setting means;
a temperature detection means for detecting the temperature inside the refrigerator; a comparison means for receiving signals from the control temperature determination means and the temperature detection means;
A control device for a showcase or the like, which is equipped with a control means that receives a signal from a comparison means and controls a load on a compressor or the like.