JP2001050631A - Controller of low-temperature showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable very easy change in the controlled temperature band of a low-temperature showcase. SOLUTION: This low-temperature showcase, displaying low temperature goods cooling them inside a storage chamber, is provided with a controlling means provided with a plurality of operating modes for controlling the inside of the storage compartment to different temperature bands, and these control means are provided with a remote controller 130 provided with switches 131 and 132 for selecting these operation modes for remote operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a low-temperature showcase installed in, for example, a convenience store.

[0002]

2. Description of the Related Art Conventionally, a plurality of open showcases and a closed type low-temperature showcase are installed in a store such as a convenience store. Conventionally, each low-temperature showcase is individually controlled by a temperature controller, and therefore, various setting operations such as the temperature of the low-temperature showcase have been performed for each individual showcase.

Further, these low-temperature showcases have different control temperature zones (set temperatures) depending on the products to be stored.
For example, + 20 ° C for lunch, +12 for sandwich
° C and daily delivery (eg milk) were set at + 5 ° C.

[0004]

In recent years, in convenience stores and the like, the number and types of displayed products vary depending on the time zone and season. For this reason, a low-temperature showcase has been developed in which the temperature zone to be controlled can be changed according to the change in the type and number of the products.

However, conventionally, when changing such a control temperature zone, an employee had to go around each low-temperature showcase and perform a change operation. There is a problem that the operation becomes extremely complicated.

The present invention has been made to solve such a conventional technical problem, and an object of the present invention is to provide a control device capable of extremely easily changing a control temperature zone of a low-temperature showcase.

[0007]

That is, the control device of the present invention is applied to a low-temperature showcase in which low-temperature articles are displayed while being cooled in a storage room, and a plurality of operations for controlling the storage room to different temperature zones. A control means having a mode is provided, and the control means is provided with a remote controller for remote operation having a switch for selecting each of these operation modes.

According to the present invention, there is provided a control device for a low-temperature showcase for displaying low-temperature articles in a storage room while cooling the low-temperature products, comprising control means having a plurality of operation modes for controlling the storage room to different temperature zones, respectively. Since this control means is provided with a remote controller for remote control having a switch for selecting each of these operation modes, the operation mode of the low-temperature showcase can be remotely controlled by a remote controller arranged in, for example, a backyard of a store. Will be able to change it.

As a result, the workability of changing the control temperature zone of the low-temperature showcase according to the displayed product is significantly improved.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a configuration diagram of a store management system 1 of a convenience store CVS as an embodiment to which the present invention is applied, and FIG. 2 shows a configuration diagram of a store device monitoring system 6 in the store management system 1. The store management system 1 according to the embodiment includes a store system 2 installed on the convenience store CVS side and a center system 3 including a headquarters C of a chain to which the convenience store CVS belongs, a maintenance management company M for performing maintenance and maintenance, and the like. It is composed. The store system 2 and the center system 3 are connected via a terminal adapter TA and an ISDN line.

The headquarters C and the maintenance management company M are responsible for monitoring store equipment, each of which is provided with a personal computer P and each connected to a terminal adapter TA.

On the other hand, the store system 2 includes a store image system 4 for photographing the inside of the store, the back door, and the like, and a store device monitoring system for monitoring the operation of each electric device such as a low-temperature showcase and lighting, which will be described later, installed in the store. 6 is comprised. The store video system 4 includes a transmitter 7, a plurality of fixed cameras 8 ... connected to the transmitter 7, a speaker 9, a microphone 11, and the like. Each fixed camera 8 ... It is installed on, for example, a ceiling in a store so that an entrance (a back entrance or the like) can be photographed.

The fixed camera 8 is capable of shooting a moving image using a CCD image pickup device.
The moving image video data photographed by is transmitted to the transmitter 7. The transmitter 7 transmits the video data transmitted from each fixed camera 8... To the personal computers P, P of the headquarters C and the maintenance management company M via the terminal adapter TA and the ISND line.
Deliver to. The distributed video data is displayed on the display of each personal computer P.

Control data is sent from the headquarters C or the personal computer P of the maintenance company M to the transmitter 7, and the transmitter 7 controls the directional direction and zoom of the fixed cameras 8. As a result, headquarters C and maintenance management company M
Thus, it is possible to monitor the occurrence of theft in the convenience store CVS and to perform remote security.

On the other hand, in the convenience store CVS, there are a plurality of open showcases S1... (Low-temperature showcases) and ice cream stockers S2, and one or two refrigerated walk-in storages (prefabricated refrigerators) S.
3. Closed type reach-in showcase S4
(Low-temperature showcase), one or two industrial refrigerators S5 are installed, and an air conditioner 12 (two in the embodiment) and a lighting 13 including a fluorescent lamp and a dimmer are mounted on the ceiling. Have been.

Of these, the open showcase S1
-The refrigerated walk-in storage S3 and the reach-in showcase S4 are connected to the refrigerators (condensing units) R1 and R2 installed in the machine room of the convenience store CVS or outdoors, and are supplied with refrigerant from these. Exhibit cooling ability.

The ice cream stocker S2 and the industrial cooler S5 have a built-in cooling device and a unique temperature controller. The open showcase S1 can change the control temperature zone to each of the operation modes for lunch, daily delivery, and sandwich according to the number and types of products to be stored as described later.

The store monitoring system 6 includes a controller 16, a series of signal lines 17 connected to the controller 16 and wired in the store, and a plurality of button readers 18 connected to the signal lines 17 by couplers. Temperature sensor 19 for controlling the temperature and temperature sensor 20 for monitoring
...., a plurality of electronic thermo units 21 ..., a plurality of I
/ O sensor unit 22 ..., high temperature sensor unit 2
3, a counter sensor unit 24 as a counter,
A watt-hour meter 27 which constitutes a watt-hour detecting device 26 for detecting the power consumption of the store together with the counter sensor unit 24
It is built from such.

Next, the configuration of the controller 16 is shown in FIG.
Shown in The controller 16 (which constitutes a part of the control means) is installed on a store wall of a convenience store CVS, and has a CPU (microcomputer).
31, a memory 32 as a storage means composed of a flash memory or the like, an I / O interface 33, a bus I / O interface 34 as a transmission / reception means, and the like. The controller 16 has LE
A display 37 composed of D or the like and a switch 38 as input means are provided.

Further, remote controllers 130... For remote operation are connected to the controller 16 by cables 134. The remote controller 13
0 are provided for each of the open showcases S1.

The bus I / O interface 34 of the controller 16 is connected to the signal line 17 through a port 36, and the button reader 18, the temperature sensor 19,. , Temperature sensor 20, ..., electronic thermo unit 21, ..., I / O
Sensor unit 22, ..., high temperature sensor unit 23,
Data is exchanged with the counter sensor unit 24.

The button reader 18, the temperature sensors 19,...
, An electronic thermo unit 21..., An I / O sensor unit 22..., A high-temperature sensor unit 23, a predetermined communication protocol for performing data communication with the counter sensor unit 24, a button reader 18, and a temperature sensor 19.・
.., temperature sensor 20,..., Electronic thermo unit 21
.., Software for identifying the I / O sensor unit 22,..., The high temperature sensor unit 23, and the counter sensor unit 24, and a control program for performing operation control are set.

The display 37 and the switch 38 are connected to the I /
It is connected to the O interface 33 to perform display control and input control. On the other hand, the remote controller 1
Reference numerals 30... Each indicate a lunch box switch 1 as shown in FIG.
31, a switch for daily delivery 132, and a switch for sandwich 133 are provided. These remote controllers 130 are, for example, a controller 16 or an open showcase S, such as an office of a store or a backyard.
.. And are drawn into a place where employees are always on standby.

Further, the I / O interface 33 of the controller 16 is connected to a terminal adapter TA on the store side via an RS-232C cable, and the bus I / O interface 34 is connected via the same signal line 17. It is also connected to the transmitter 7 of the store video system 4.

On the other hand, the electronic thermo unit 21 is provided in each open showcase S1,..., Refrigerated walk-in storage S3, and reach-in showcase S4. As shown in FIG. 4, the electronic thermo unit 21 is composed of a thermostat chip 41 formed in a chip shape.
1 is connected to the control temperature sensor 19 provided in a storage room of the showcase (hereinafter referred to as the inside of the refrigerator) via a switch 42, and the switch 42 is further connected to the signal line 17. .

The thermostat chip 41 is connected to a volume 43, a switching element 44 composed of transistors and thyristors, and a relay 46 composed of a photocoupler.

The thermostat chip 41 (which constitutes a part of the control means) includes an interface logic 47 composed of a logic circuit as shown in detail in FIG.
A thermostat register (storage means) 48, a comparator (comparison means) 49, a temperature data register 51,
A shift register 52, an A / D converter 53 (constituting a setting unit), and an operation mode (configuration) register (storage unit) 54 are provided, each of which is constituted by one chip.

The interface logic 47 has a serial communication function for transmitting and receiving data via the temperature sensor 19 and the switch 42, a register, a protocol, and the like. Therefore, by being connected to the temperature sensor 9 by the switch 42, it has a function of receiving data from the temperature sensor 19 and transmitting data to the temperature sensor 19. The upper limit temperature TH and the lower limit temperature TL taken from the temperature sensor 19 are written in the thermostat register 48 as described later.

As will be described later, the data of the internal temperature TP received by the interface logic 47 from the temperature sensor 19 is written in the temperature data register 51. Also,
The volume 43 is externally connected to the A / D converter 53. Then, the resistance value of the volume 43 is converted into a temperature shift value TC by the A / D converter 53 (64-position digital register). A / D converter 53
Can be set to 64 ° C., 32 ° C., 16 ° C., 8 ° C., and 4 ° C., which are the change widths of the temperature shift value TC, by register bit shift. The shift register 52 is set to use several digits of the temperature shift value.

The data of the internal temperature TP in the temperature data register 51 is sent to a comparator 49. Also,
The upper limit temperature TH and the lower limit temperature TL in the thermostat register 48 are also sent to the comparator 49. Further, the temperature shift value TC is also sent to the comparator 49 via the shift register 52. And this comparator 49
Is connected to the gate of the switching element 44. This switching element 44 controls a relay 46,
The relay 46 controls the energization of the solenoid valves V for controlling the refrigerant of the showcases S1, S3 and S4 (which also control the electric heater for defrosting).

The operation mode of each function of the thermostat chip 41 is determined by the operation mode register 54. The operation mode set by the operation mode register 54 is set at the time of production. In particular, the change width of the temperature shift value TC in the A / D converter 53 by the operation mode register 54 is 64 ° C., 32 ° C.
C, 16C, 8C, or 4C.

On the other hand, the temperature sensor 19 (temperature sensor 2)
0 is the same), as shown in detail in FIG. 6, a control unit 61 as a terminal-side control unit, a memory 62, an I / O interface 63, a sensor unit 64, a TH register 66,
TL register 67 and setting register 68 for determining the state
, A CRC generator 69 for ensuring communication consistency, a power supply detection unit 71 for detecting a Vcc power supply described later, a capacitor 72, diodes 73 and 73, and the like.

In this case, the capacitor 72 is connected to the diode 7
The input terminal 76 is connected to the diode 73 and the I / O interface 63.
The input terminal 76 is connected to the thermostat chip 41 or the signal line 17 via the switch 42, and the capacitor 72 is also connected to the I / O interface 63.
Data is generated and sent to the output of the signal line 17 or the thermostat chip 41 by a pulse signal composed of, for example, a potential (high potential) of +5 V and a low potential (0 V).

When the temperature sensor 19 is connected to the signal line 17 or the thermostat chip 41, power is supplied to each element as long as the high-potential and low-potential pulse signals constituting data are at the high potential. And the capacitor 7
2 is also charged. Then, while the potential is low, the capacitor 72 discharges power to supply power to each element.

The temperature sensor 19 has Vcc (DC + 5)
V) A power supply terminal 77 is also provided and connected to the diode 74. The temperature sensor 19
Is connected to a power supply line, each element is configured to be able to operate also by power supply from the power supply line. That is, in that case, without filling the capacitor 72,
Since each element operates, convenience is improved when it is desired to quickly operate the temperature sensor 19 at the time of inspection or the like.

Further, the control unit 61 takes in the temperature data of the inside of the refrigerator detected by the sensor unit 64 and writes it into the memory 62 once. Then, when polling is performed from the thermostat chip 41 by the I / O interface 63, the temperature data written in the memory 62 is transmitted to the thermostat chip 41 by the I / O interface 63.

Here, the ID code of the temperature sensor 19 itself and identification data indicating that the sensor is a sensor are written in the I / O interface 63, the TH register 66 stores the upper limit temperature TH of the showcase, and the TL register The lower limit temperature TL is written in 67. These upper limit temperatures T
The data of H and the lower limit temperature TL are transmitted from the controller 16 via the signal line 17 and the switch 42. The memory 62 includes the thermostat chip 41 and the controller 16.
A communication protocol and the like for performing data communication with the device are stored. If a failure occurs in the temperature sensor 19, the failure data is also written to the memory 62, and the thermostat chip 41 and the controller 16
Sent to. Further, the temperature sensor 19 has a self-holding function for holding the current state when communication with the thermostat chip 41 or the like is interrupted.

FIG. 7 is a block diagram showing the internal structure of the switch 42. As shown in FIG. The switch 42 includes IC1, IC2 and I
It is composed of three ICs C3, each connected by a data line. IC1 is connected to the signal line 17
And the thermostat chip 41 is connected to IC2.
However, the input terminals 76 of the temperature sensor 19 are connected to the IC 3.

And the thermostat chip 41 is always
Although the line between the (interface logic 47) and the temperature sensor 19 is connected, when data (connection instruction) is sent from the controller 16, the line between the thermostat chip 41 and the temperature sensor 19 is cut off and the signal line 17 is connected. And the line between the temperature sensor 19 is preferentially connected.

The structure of the monitoring temperature sensor 20 is the same as that of the temperature sensor 19, except that it is directly connected to the signal line 17 and that the room (inside the store) of each store, each showcase, etc. (S1, S2) , S3, S4, S5) and around the refrigerators R1, R2 (in the machine room, etc.).

FIG. 8 shows the configuration of the I / O sensor unit 22. The I / O sensor unit 22 includes a control unit 81 as terminal-side control means, memories 82 and 83,
An I / O interface 84, an input / output unit 86, a state storage unit 87 for storing whether the input / output unit 86 is in an input state or an output state, an ID unit 88 for storing its own ID code,
It is composed of a capacitor 89, diodes 91 and 92 and the like.

In this case, the capacitor 89 is connected to the diode 9
When the input terminal 93 of the I / O sensor unit 22 is connected to the output side of the I / O sensor unit 22 and the signal line 17 is connected to the terminal of the capacitor 89, the high-level signal constituting the data as described above is connected. While the potential and the low potential pulse signals are at the high potential, power is supplied to each element as it is, and the capacitor 89 is also charged. Then, while the potential is low, the capacitor 89 discharges, and the power of each element is covered.

The I / O sensor unit 22 is also provided with a Vcc (DC + 5V) power supply terminal 94 connected to the input side of the diode 92. If this Vcc power supply terminal 94 is connected to a power supply line, the I / O sensor Each element of the unit 22 can operate also by power supply from a power supply line. That is, in this case, each element operates without filling the capacitor 89, so that the convenience is improved when the I / O sensor unit 22 is to be quickly operated at the time of inspection or the like.

Further, when ON / OFF data is transmitted from the controller 16 via the signal line 17 by the I / O interface 84, the control unit 81 turns ON / OFF the ON / OF data.
Based on the F data, the input / output unit 86 controls the input / output terminal 9
6, 96 (with two terminals) are turned ON / OFF (output mode).

Here, the ID section 88 has an I / O as described above.
The ID code of the sensor unit 22 itself and the identification data indicating that the sensor unit 22 is an I / O sensor unit are stored, and the memory 82 stores various data and a communication protocol for performing data communication with the controller 16. . If a failure has occurred in the I / O sensor unit 22, the data is also written to the memory 82 and transmitted to the controller 16. Further, the I / O sensor unit 22 also has a self-holding function for holding the current state when communication with the controller 16 is interrupted.

The I / O sensor unit 22 (the input / output unit 86 is in the output mode) is wired on the board as shown in FIG. That is, 101 is a photocoupler including a photodiode 101A and a phototriac 101B,
102 is a resistor, 103 is a diode as a rectifying element,
104 is a capacitor as a storage element.

In this case, the capacitor 104 is connected to the output side of the diode 103, and the connection point between the diode 103 and the capacitor 104 is connected to the I / O sensor unit 22.
Between the input / output terminal 96 of the resistor 102 and the photodiode 1
01A are connected in series. The Vcc power supply terminal 94 of the I / O sensor unit 22 is connected before the diode 103. The phototriac 101B is connected between the power supply AC and an AC control element (such as a thyristor) 106. The operation of the air conditioner 12 is controlled by the AC control element 106, and the lighting 13 is dimmed.
The control output is also transmitted to the transmitter 7.

Here, when the diode 103 is connected to the signal line 17, power is supplied to the photodiode 101A via the resistor 102 as long as the high-potential and low-potential pulse signals constituting data are at the high potential. And the capacitor 104 is also charged. While the potential is low, the capacitor 104 is discharged from the capacitor 104 to supply power to the photodiode 101A.

Similarly, if the Vcc power supply terminal 107 is connected to the connection point between the diode 103 and the capacitor 104, and this Vcc power supply terminal 107 is connected to the power supply line, the photodiode 101A operates even when power is supplied from the power supply line. Will be able to do it. In other words, in this case, each element operates without filling the capacitor 104, so that the convenience is improved when it is desired to operate quickly at the time of inspection or the like.

The input / output unit 86 of the I / O sensor unit 22 attached to the refrigerators R1 and R2 is set to the input mode, detects the operating state of the refrigerators R1 and R2, and transmits data to the controller 16. . Further, the high temperature sensor unit 23 detects abnormally high temperatures of the refrigerators R1 and R2 and transmits data to the controller 16.

Next, the operation in the above configuration will be described. Now, it is assumed that the switch 42 connects the line between the temperature sensor 19 and the signal line 17. First, the CPU 31 of the controller 16 sends each element (the temperature sensor 1) to the signal line 17.
(9, 20, I / O sensor unit 22, high temperature sensor unit 23, counter sensor unit 24, etc.). Note that the counter sensor unit 24 also has the same communication function as the temperature sensor 19 and the like.

This scanning operation is performed by reading the ID codes of the temperature sensors 19, 20, the I / O sensor unit 22, the high temperature sensor unit 23, and the counter sensor unit 24 according to the procedure shown in FIG. Hereinafter, these are all referred to as terminal devices.
Description will be made assuming that the D code is a 64-bit one as shown below.

.. 63 First terminal device 001100000... 0 Second terminal device 1011100000... 0 Third terminal device 110000000. 0 Fourth terminal device 00100000 ... 0

The controller 16 (CPU 31) first transmits a communication command to each terminal device, and each terminal device
Reply the command. Next, when the controller 16 transmits the ID search command, the terminal device returns the 0th bit as a response 1 from its own ID code, and returns its complement as a response 2 as follows. When the 0th bit is 0, the connection terminal of the signal line 17 is set to “L”.
In the case of 1, the terminal is set to “H”.

Bit 0 Response 1 Response 2 First terminal device 0 1 Second terminal device 1 0 Third terminal device 1 0 Fourth terminal device 0 1 Logical product 0 0

The controller 16 makes a determination based on the logical product, and determines that 0 and 1 exist in the 0th bit of each terminal device. Note that the signal line 17 is actually “L” if there is at least one “L” among the connection terminals of the terminal devices connected to the signal line 17, and “H” if all are “H”. Since the controller 16 determines the potential of the signal line 17, the controller 16 detects information on the logical product as a result.

Then, the controller 16 transmits the search commands 0 and 1 of the first bit. At this time, the configuration is such that, when 0 is transmitted, only the terminal device whose 0th bit is 0 returns the first bit, and when 1 is transmitted, only the terminal whose 0th bit is 1 returns the first bit. Have been.

Therefore, a response to 0 at the time of the search of the first bit is made from the first and fourth terminal devices as follows.

Bit 1 Response 1 Response 2 First terminal device 0 1 Second terminal device Third terminal device Fourth terminal device 0 1 Logical product 0 1

The controller 16 makes a determination based on the logical product, and determines that only 0 exists in the first bit in this case. Therefore, it is determined that there is an ID code of 00.

A response to 1 at the time of searching the first bit is made from the second and third terminal devices as follows.

Bit 1 Response 1 Response 2 First terminal device Second terminal device 0 1 Third terminal device 1 0 Fourth terminal device Logical product 0 0

The controller 16 makes a determination based on the logical product, and determines that 0 and 1 exist in the first bit in this case. Therefore, in this case, it can be seen that the ID codes of 10 and 11 exist.

Next, upon the existence of the ID code 00 being determined, the controller 16 transmits a search command 0 of the second bit. A response to 0 at the time of searching the second bit is made from the first, second, and fourth terminal devices as described below.

Bit 2 Response 1 Response 2 First terminal device 10 Second terminal device 10 Third terminal device Fourth terminal device 10 Logical product 10

The controller 16 makes a determination from the logical product, and determines that only 1 exists in the second bit in this case. Therefore, it is determined that there is an ID code of 001.

Next, in response to the determination of the existence of the ID code 001, the controller 16 transmits a search command 1 of the third bit. A response to 1 at the time of the search of the third bit is made from the first and second terminal devices.

Bit 3 Response 1 Response 2 First terminal device 10 Second terminal device 10 Third terminal device Fourth terminal device Logical product 10

The controller 16 makes a determination based on the logical product, and determines that only 1 exists in the third bit in this case. Therefore, it is determined that there is an ID code of 0011.

Next, in response to the determination of the existence of the ID code 0011, the controller 16 transmits a search command 1 of the fourth bit. A response to 1 at the time of the search for the fourth bit is made from the first and second terminal devices.

Bit 4 response 1 response 2 first terminal device 0 1 second terminal device 0 1 third terminal device fourth terminal device AND 0 1

The controller 16 makes a determination based on the logical product, and determines that only 0 is present in the fourth bit in this case. Therefore, it is determined that there is an ID code of 00110.

Next, in response to the determination of the existence of the ID code 00110, the controller 16 sends the search command 0
Send The response to 0 at the time of the search of the fifth bit is made from all.

Bit 5 Response 1 Response 2 First terminal device 0 1 Second terminal device 0 1 Third terminal device 0 1 Fourth terminal device 0 1 Logical product 0 1

The controller 16 makes a determination based on the logical product, and determines that only 0 exists in the fifth bit in this case. Therefore, it is determined that there is an ID code of 00100. Thereafter, if only the search command 0 is repeated up to the 63rd bit, 001100... 0, that is, it is determined that the terminal device having this ID code is connected.

Also, when searching for the first bit, 1
Since 1 and 0 are present in the first bit in the response to, this time, 0 and 1 are transmitted in the search of the second bit, and narrowing down is similarly performed. Finally, if the bits in which 0s and 1s exist are eliminated, the ID codes of all the terminal devices will be determined.

The CPU 31 of the controller 16 uses the ID codes collected in this manner to send the temperature sensors 19, 2
0, I / O sensor unit 22, high temperature sensor unit 2
3. Identify the connection status of the counter sensor unit 24,
The data is stored in the memory 32, and thereafter, data is transmitted and received between each temperature sensor or the sensor unit using the ID code.

Next, the CPU 31 of the controller 16 transmits the data of the upper limit temperature TH and the lower limit temperature TL to each of the temperature sensors 19 using the collected ID codes.
In this case, regarding the open showcase S1 ...
Switches 131 of the remote controller 130,
The values set by the operations of 132 and 133 are transmitted.

That is, when the lunch switch 131 is depressed, the CPU 31 of the controller 16 sets the upper limit temperature TH to, for example, + 21 ° C., the lower limit temperature TL to + 19 ° C. (average set value + 20 ° C.), When the switch 132 is pressed, the upper limit temperature TH is set to, for example, + 6 ° C., and the lower limit temperature TL is set to + 4 ° C. (average set value + 5 ° C.). When the sandwich switch 133 is pressed, the upper limit temperature TH is set.
Is transmitted to the temperature sensor 19, for example, as + 13 ° C. and the lower limit temperature TL as + 11 ° C. (average set value + 12 ° C.).

These data are stored in the open showcase S corresponding to the operated remote controller 130.
It is transmitted to the temperature sensor 19 using the ID code of the temperature sensor 19. When the control unit 61 of the temperature sensor 19 receives the data via the interface 63,
The upper limit temperature TH is written in the TH register 66, and the lower limit temperature TL is written in the TL register 67.

When the switch 42 connects the thermostat chip 41 and the temperature sensor 19, the interface logic 47 connects the TH register 6 of the temperature sensor 19.
6 and the upper limit temperature TH and the lower limit temperature TL in the TL register 67 are taken in and stored in the thermostat register 48.

Here, in order to use the open showcase S1 as a daily delivery showcase, the remote controller 130 of the open showcase S1 assumes that the daily delivery switch 132 is pressed.
The interface logic 47 writes + 6 ° C. as the upper limit temperature TH and + 4 ° C. as the lower limit temperature TL in the thermostat register 48.

In the operation mode register 54, it is assumed that the change width of the temperature shift value TC is 16 ° C. in the A / D converter 53, and that the operation mode register 54 is set to the thermostat operation. As a result, the thermostat chip 41 alone starts the thermostat operation even after the power is turned on.

Then, the resistance value of the volume 43 is changed to change the temperature shift value TC to 0 ° C., which is the minimum of the change width of 16 ° C.
Then, the comparator 49 adds the temperature shift value TC to the upper limit temperature TH. As a result, the shifted upper limit temperature becomes + 6 ° C. as it is.

The comparator 49 determines the lower limit temperature T.
The temperature shift value TC is added to L. As a result, the shifted lower limit temperature becomes + 4 ° C. as it is.

On the other hand, the interface logic 47 of the thermostat chip 41 polls the temperature sensor 19. In response to the polling, the control unit 61 of the temperature sensor 19 transmits the temperature data (inside temperature TP) written in the memory 62 to the thermostat chip 41 through the interface 63. The interface logic 47 receives the temperature data and writes it in the temperature data register 51.

The comparator 49 sets the upper limit temperature: + 6 ° C., the lower limit temperature + 4 ° C., and the temperature data register 51
Is compared with the inside temperature TP sent from the temperature sensor 19, and when the inside temperature TP reaches + 6 ° C. (upper limit temperature), the switching element 44 is turned on, and the inside temperature TP becomes +4.
℃ (lower limit temperature), the switching element 4
4 is turned off.

When the switching element 44 is turned on, the solenoid valve V is energized by the relay 46 to open the solenoid valve V. When the switching element 44 is turned off, the relay 4
6 stops the energization of the solenoid valve V. Refrigerator R1,
Under control of a low-pressure switch (not shown), R2 is operated if the solenoid valve V of any of the showcases S1, S3, S4 is open, and stops if all of them are closed. Thus, the inside of the open showcase S1 is controlled between + 6 ° C. and + 4 ° C. in an average daily control temperature range of + 5 ° C.

Here, when the open showcase S1 is used as a lunch showcase, the lunch switch 131 of the remote controller 130 is pressed. As a result, the inside of the refrigerator is controlled between + 21 ° C. and + 19 ° C. in a control temperature zone for lunch with an average of + 20 ° C. When the open showcase S1 is used as a sandwich showcase, the user presses the sandwich switch 133 of the remote controller 130 this time. Thereby, as a result, the inside of the refrigerator is + 13 ° C. and +11
The temperature will be controlled in a control temperature zone for sandwiches between + 12 ° C on average + 12 ° C.

With such a configuration, the thermostat chip 41 of the electronic thermo unit 21 of the open showcase S1 has three operation modes: a lunch mode, a daily delivery mode, and a sandwich mode. , Each operation mode is the remote controller 130
Are selected by the switches 131 to 133. Since the remote controllers 130 are drawn into the office of the store, the operation of changing the operation mode of each open showcase S1 can be performed without having to visit them one by one.

The controller 16 polls the temperature sensors 20 for monitoring. The procedure (communication protocol) at this time will be described with reference to FIG. The controller 16 transmits a communication command, and an OK command is returned from the temperature sensor 20. The controller 16 transmits a calling command of the temperature sensor 20 and the ID code of the temperature sensor 20.

Then, a temperature measurement start command is transmitted. The control unit 61 of the temperature sensor 20 measures the temperature data in response to the polling, and stores it in the memory 62. Next, the controller 16 transmits a communication start command again, and an OK command is returned from the temperature sensor 20.
The controller 16 transmits a calling command of the temperature sensor 20 and the ID code of the temperature sensor 20.

Then, a memory call command is transmitted. The controller 61 of the temperature sensor 20 returns the temperature data stored in the memory 62 as described above in response to the polling. Finally, the controller 16 transmits a reset command, and the temperature sensor 20 returns an OK command. The same applies to the collection of temperature data between the thermostat chip 41 and the temperature sensor 19.

The CPU 31 of the controller 16 temporarily writes the collected temperature data in the memory 32, and transmits the temperature data to the headquarters C and the personal computer P of the maintenance management company M. As a result, the headquarters C and the maintenance management company M can centrally monitor the room temperature in the store, the inside temperature of each showcase, the temperature of the machine room, and the like.

The CPU 31 of the controller 16 transmits the control data together with the ID code to each of the I / O sensor units 22 via the signal line 17. Control unit 8 of I / O sensor unit 22 of air conditioner 12 and lighting 13
Upon receiving the control data of its own ID code, 1 turns ON / OFF the input / output terminal 96 based on the control data. By this ON / OFF, the photodiode 101A
Are turned ON (emission) / OFF (turned off), whereby the phototriac 101B is turned ON / OFF, whereby the AC control element 106 is turned ON / OFF.

Normally, the air conditioner 12 uses the AC control element 1
06 is driven 100% and the lighting 13 is also 1
Light is emitted at an illuminance of 00%.

In this embodiment, the remote controller 130 is connected to the controller 16. However, the present invention is not limited to this. The remote controller 130 is connected to the electronic thermo unit 21 of each open showcase S 1. The thermostat chip 41 may directly read the upper limit temperature TH and the lower limit temperature TL without going through the thermocouple 19.

In the embodiment, the remote controller 130 is connected to the controller 16 using the cable 134. However, the switch operation data is transmitted from the remote controller 130 to the controller 16 by wireless data communication using low-power radio or infrared rays. You may do it. Further, like the temperature sensor 19 and the like, the remote controller 130 also holds an ID code and the like, and performs data communication with the controller 16 via the signal line 1.
The communication may be performed in the same manner as the data communication between the temperature sensor 19 and the like using the controller 7 and the controller 16. Furthermore, the various numerical values shown in the embodiments are not limited to those, and are appropriately set in accordance with the use situation.

[0099]

As described above in detail, according to the present invention, in a control device for a low-temperature showcase which displays cold articles in a storage room while cooling them, a plurality of operation modes for controlling the storage room to different temperature zones are provided. Since the control means has a remote controller for remote control having a switch for selecting each of these operation modes, the operation mode of the low-temperature showcase can be set, for example, in a backyard of a store. It can be changed by remote control with the remote controller arranged.

As a result, the workability of changing the control temperature zone of the low-temperature showcase according to the displayed product is significantly improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a store management system of a convenience store as an embodiment to which the present invention is applied.

FIG. 2 is a configuration diagram of a store equipment monitoring system in the store management system.

FIG. 3 is a block diagram of an electric circuit of the controller.

FIG. 4 is a block diagram of an electronic thermo unit.

FIG. 5 is a block diagram of an electric circuit of the thermostat chip.

FIG. 6 is a block diagram of an electric circuit of the temperature sensor.

FIG. 7 is a block diagram of an electric circuit of the switch.

FIG. 8 is a block diagram of an electric circuit of the I / O sensor unit.

FIG. 9 is an electric circuit diagram of an I / O sensor unit and peripheral circuits.

FIG. 10 is a diagram showing a procedure of reading an ID code of each temperature sensor or the like (terminal device) by a controller.

FIG. 11 is a diagram showing a procedure for collecting temperature data from a temperature sensor by a controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 store management system 2 store system 3 center system 4 store image system 6 store equipment monitoring system 16 controller 17 signal line 18 button reader 19, 20 temperature sensor 21 electronic thermo unit 22 I / O sensor unit 41 thermostat chip 130 remote controller 131 lunch box Switch 132 daily switch 133 sandwich switch CVS convenience store S1 open showcase (low temperature showcase)

 ──────────────────────────────────────────────────の Continued on the front page (72) Kazuya Imamura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Shigeichi Kawai 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 F-term in Sanyo Electric Co., Ltd. (reference) 3L045 AA02 BA01 LA15 LA16 MA00 MA02 MA05 MA20 NA19 PA02 PA03 PA06

Claims (1)

[Claims] 1. A low-temperature showcase for cooling and displaying low-temperature articles in a storage room, comprising: control means having a plurality of operation modes for controlling the storage room to different temperature zones, wherein the control means includes: A control device for a low-temperature showcase, comprising a remote controller for remote control having a switch for selecting each of these operation modes.