JPH09145220A - Centralized control device of showcase or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve energy saving and management of freshness by issuing a signal, which variably controls a temperature set value during a commanded period of time, to an indicated temperature control device from a monitor control console to forcedly raise and lower the temperature set value at a scheduled time and to control starting and stopping of a fan. SOLUTION: A signal for variably controlling a temperature set value outputted from a central calculating circuit 5 of a monitor control console 2 is inputted into a calculating circuit 10 through a transmitter/receiver 15 of a temperature control device 4a indicated to be subjected to operational processing, and inputted into a temperature control circuit 11 for an indicated period of time to be subjected to duty control. Further, the signal is outputted to a fan control circuit 13 through the calculating circuit 10 to perform controlling starting and stopping of a fan. Accordingly, it is possible to forcedly raise and lower the temperature set value at a scheduled time and to control starting and stopping of the fan to improve energy saving and management of freshness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized control device for a showcase or the like, which centrally controls the operating states of a plurality of refrigerator-separated type showcases, and more particularly to a duty (time is determined to be used in a refrigerator). The present invention relates to a centralized management device such as a showcase for performing control for raising and lowering temperature.

[0002]

2. Description of the Related Art For example, in a conventional showcase in which the temperature is controlled by the blowing temperature of cold air, in order to prevent the temperature inside the refrigerator from lowering at night with a night cover, it is necessary to set the temperature inside the refrigerator in accordance with the lighting off time. Slide up (override)
It is known to utilize a night setback thermostat. Further, it is known that even in the conventional showcase in which the temperature is controlled by the internal temperature, the night setback state can be inevitably controlled in order to reduce the load.

[0003]

However, in the conventional centralized control device for a showcase or the like, before and after the control of the night setback state and the defrosting as described above,
A centralized management device such as a showcase having a duty function such as temperature control lower than a normal control temperature in order to keep the displayed product once and keep it fresh has not been developed.

The present invention was devised in view of the above points, and its purpose is not just a night setback function, but forcibly raising or lowering the temperature set value at a scheduled time, By controlling the start and stop of the fan (in the case of a double air curtain, the outer layer fan),
It is to provide a centralized management device such as a showcase with improved energy saving and freshness management.

[0005]

In order to achieve the above object, in the present invention, a plurality of showcases and the like are collectively and remotely operated from a monitor control panel via a temperature control device connected by a serial transmission line. In a centralized control device for operation control, a signal from which a temperature control value is variably controlled for a designated time is output from a monitor control panel to a designated temperature control device.

The temperature control device is provided with a temperature control circuit, a defrost output circuit, an arithmetic circuit, and a fan control circuit,
When the monitor control panel outputs a signal that variably controls the temperature set value for a specified time to the specified temperature control device, it is preferable to simultaneously perform fan control.

Alternatively, the temperature control device is provided with a temperature control circuit, a defrosting output circuit, and an arithmetic circuit, and the temperature control device designated by the monitor control panel variably controls the temperature set value for a designated time. When is output, the fan control may be performed only during defrosting. Since the temperature control output contact Ts of the temperature control circuit of this temperature control device has a contact configuration that is opened during defrosting, the temperature control output contact Ts can be opened without providing a special fan control circuit in the temperature control device. If used, it is possible to perform simple and inexpensive fan control limited to the time of defrosting.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic block diagram of a centralized control device such as a showcase according to the present invention, FIG. 2 is a flow chart of duty control of the centralized control device according to the present invention, and FIG. 3 is a temperature setting value in a refrigerator showing only a night setback state. FIG. 4 is a time chart of the start / stop of the outer layer fan, and FIG. 4 is a time chart of the set temperature in the refrigerator and the start / stop of the outer layer fan in which the night setback state and cooling before and after defrosting are combined.

As shown in FIG. 1, the central control device A for the showcases 1a, 1b, ...
, And the temperature control devices 4a, 4b ... Of the respective showcases 1a, 1b ... Connected by the serial transmission line 3.
It consists of, and. The serial transmission line 3 is a two-core or three-core communication line, and each temperature control device 4a,
There is a crossover wiring between 4b and the like.

The monitor control panel 2 is a showcase 1
are installed in a remote security room or the like and collectively control the operation of the showcases 1a, 1b. That is, as shown in FIG. 1, the monitor control panel 2 has a central processing circuit 5, which calls in various data such as schedule data 6 and temperature control data 7, calculates the data, and designates them via the transceiver 8. The temperature control device (for example) 4a is configured to output a signal for a specified time.

In the case of the present invention, the schedule data 6 includes duty setting time data of each temperature control device, and the temperature control data 7 includes temperature adjustment value data and shift up / down data of each temperature control device. , Which are stored respectively, are called into the central processing circuit 5, are operated, and output a signal in which the temperature set value is variably controlled. It should be noted that reference numeral 9 is a duty changeover switch, and when duty control is not performed, all duty data are ignored,
A signal for outputting a normal temperature set value is output.

On the other hand, the temperature control devices 4a, 4b ... Include an arithmetic circuit 10, a temperature control circuit 11, a defrost output circuit 12, and
There is a fan control circuit 13 and the like. The temperature control circuit 11 is a temperature control output contact Ts for turning on and off the cooling operation of the showcase.
The defrosting output circuit 12 has a defrosting output contact (not shown) for turning on / off the defrost. The temperature control output contact Ts has a contact configuration that is opened during defrosting. Reference numeral 14 is an address setting unit, and 15 is a transmission / reception unit on the temperature control device 4a side.

The signal for variably controlling the temperature set value output from the central arithmetic circuit 5 of the monitor control panel 2 is input to the arithmetic circuit 10 via the transceiver 15 of the designated temperature control device (for example) 4a, The temperature is calculated and input to the temperature control circuit 11 for a designated time, and the duty is controlled. Most of all, when duty control is not performed by switching the duty changeover switch of the monitor control panel 2, all duty data are ignored and a signal for outputting a normal temperature set value is output. As described above.

Further, the signal output from the monitor control panel 2 which variably controls the temperature set value for the designated time to the designated temperature control device (for example) 4a is the arithmetic circuit 10.
It is also output to the fan control circuit 13 via the, and control for starting and stopping the fan is performed. In addition,
Since this fan is stopped only during defrosting, the fan may be started and stopped in conjunction with the temperature control output contact Ts, which has a contact structure that opens during defrosting. Further, the fan may be stopped when the defrost output contact is closed.

Next, the operation of duty control will be described. As shown in the flowchart of FIG. 2, step S
In 1, it is determined whether duty control is performed. Yes
If so, the process proceeds to step S2. If No, the process proceeds to step S5. In step S2, it is determined whether or not it is within the time for temperature control. If Yes, the process proceeds to step S3. If No, the process proceeds to step S5. In step S3, the temperature control value of the temperature control device to be controlled is changed.
That is, the duty control value TSD (TSD = TS) obtained by adding the shift value TD to the current temperature control value TS.
+ TD) is the new temperature control value (TS = TSD)
And Then, in step S4, the temperature control value TS is transmitted to the temperature control device.

On the other hand, No in step S1 and step S2.
In this case, the temperature is not shifted in step S5, and the process proceeds to step S4 to send the temperature control value TS without duty control to the temperature control device.

Next, an example of only the night setback state in which the temperature setting value is increased by the duty control will be described with reference to the internal temperature setting value and the time chart of the start / stop of the outer layer fan (FIG. 3). That is, the example of FIG. 3 is a showcase that opens at 10:00 and closes at 20:00, and is in the night setback state from 20:00 to 9:00 the following day. The normal set value for the inside temperature from 9:00 to 20:00 is, for example, 0 ° C. During this time, the outer layer fan is operating, but when the night setback state is reached, the set value for the inside temperature is overridden to, for example, 3 ° C. The outer fan is also stopped.

Next, an example in which the night setback state of duty control is combined with cooling before and after defrosting will be described with reference to a time chart of the internal temperature setting value and the start / stop of the outer layer fan (FIG. 4). That is, in the example of FIG. 4, defrosting is applied four times to the state of FIG. 3, and defrosting is performed at 2:00, 8:00, 14:00, and 20:00, and 30 minutes before and after defrosting (1 Time), the temperature is lowered by -5 ° C from the normal set temperature in the refrigerator, the cooling operation is performed, and the outer layer fan is also stopped. For example, at 2:00 and 8:00 in the night setback state, the set temperature in the refrigerator is + 3 ° C, so −
Since the internal temperature setting value is 0 ° C at 2 ° C and around 14:00 and 20:00, the cooling operation is performed at -5 ° C.

[0019]

As described above, according to the centralized control device for a showcase or the like which performs the duty control of the present invention,
The following effects are obtained.

(1) First, when raising the temperature inside the refrigerator, energy can be saved more than before by raising the control temperature for a predetermined time when the load is low at night. As a result, it is also effective in preventing overcooling of fruits and vegetables and daily products. Also, if the outer layer fan is also stopped at this time, it will save more energy, reduce cold air leaks from the night cover, and help reduce cold aisle the next morning.

(2) Next, in the case of lowering the temperature in the refrigerator, for example, for 30 minutes immediately before defrosting, the temperature is forcibly controlled to be lower than the normal control temperature, so that the displayed products are held once, and then Defrosting can reduce the rise in product temperature during defrosting, which is an excellent effect on freshness management. Especially meat
It is effective for products such as fresh fish and ice cream. Of course, if the temperature is controlled to be lower than the normal control temperature for, for example, 30 minutes after the defrosting is completed, the effect is further enhanced. Further, by stopping the outer layer fan during defrosting, the defrosting time can be shortened in the case of an open showcase.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a centralized management device such as a showcase according to the present invention.

FIG. 2 is a flowchart of duty control of the centralized management device of the present invention.

FIG. 3 is a time chart of the internal temperature setting value and the start / stop of the outer layer fan, showing only the night setback state.

FIG. 4 is a time chart showing a combination of a night setback state and cooling before and after defrosting, to set the internal temperature and to start / stop the outer fan.

[Explanation of symbols]

 A Central control device for showcases 1a, 1b Showcase 2 Monitor control panel 3 Serial transmission lines 4a, 4b Temperature control device 5 Central processing circuit 6 Schedule data 7 Temperature control data 8 Transceiver 9 Duty change switch 10 Processing circuit 11 Temperature Adjustment circuit 12 Defrost output circuit 13 Fan control circuit 14 Address setting unit 15 Transmitter / receiver unit

Claims (3)

[Claims] 1. A central control device for collectively and remotely controlling a plurality of showcases and the like via a temperature control device connected from a monitor control panel via a serial transmission line, and a temperature specified by the monitor control panel. In the control device,
A centralized management device for showcases, etc., which outputs a signal whose temperature setting value is variably controlled for a specified time. 2. The temperature control device includes a temperature control circuit, a defrost output circuit, an arithmetic circuit, and a fan control circuit, and the temperature control device specified by the monitor control panel variably controls the temperature set value for a specified time. The centralized management device for a showcase or the like according to claim 1, wherein fan control is performed when the signal is output. 3. The temperature control device includes a temperature control circuit, a defrosting output circuit, and an arithmetic circuit, and outputs a signal to the temperature control device designated by the monitor control panel to variably control the temperature set value for a designated time. The centralized control device for a showcase or the like according to claim 1, wherein the fan control is performed only when defrosting when output.