JP2001050632A - Control device for apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eminently improve productivity and reduce cost through the use of parts which are in common with each other and simplification of a wiring, when a plurality of apparatuses are controlled. SOLUTION: This control device comprises a signal wire 22, arranged throughout a plurality of refrigerators 1A..., a temperature sensor 27 and a switching element 28, both connected to the signal wire, and a controller 36 situated at a refrigerator 1A and connected to the signal wire. The temperature sensor comprises a memory means to hold its own ID code, and a sensor control means to input data detected by a detecting element and transmit it to the controller. The switching element comprises a switching means, a memory means to hold its own ID code, a transmitting and receiving means, and a switching element control means to control the switching means, based on data from the transmitting and receiving means.

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 refrigerator such as a commercial refrigerator, a low-temperature showcase, a prefabricated refrigerator, a cooling storage such as a vending machine, an air conditioner and other devices.

[0002]

2. Description of the Related Art Conventionally, for example, in a kitchen of a hotel or a restaurant, a plurality of cooling storages such as commercial refrigerators are installed. And, these cooling storages, a compressor constituting a cooling device, a condenser, a built-in cooler or the like, or a compressor and a condenser separately, condensing the refrigerant discharged from the compressor in the condenser, After the pressure is reduced by the pressure reducing device, it is supplied to a cooler to exert a cooling effect, and the cool air cooled by the cooler is circulated in the refrigerator by a cooling fan to cool to a predetermined low temperature. .

Further, a condenser fan is installed around the compressor and the condenser, and the condenser and the compressor are air-cooled by the condenser fan.

[0004]

In such a cooling storage, temperature sensors are mounted according to various uses such as control of the temperature in the storage or protection of the compressor and the condenser, and the number thereof varies depending on the model. In addition, the number of fans and the number of dew-prevention heaters for preventing dew condensation differ depending on the model, so the wiring of the electrical system including switches that control them and the configuration of the control device that controls these also differ depending on the model come.

[0005] For this reason, the productivity has been remarkably reduced, especially for business-use equipment produced in small quantities by other models, and improvement has been desired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problems. In controlling a plurality of devices, remarkable improvements in productivity and cost due to common use of parts and simplification of wiring have been made. It is an object of the present invention to provide a control device of a device capable of reducing the number of devices.

[0007]

That is, a control device for a device according to the present invention comprises a signal line wired over a plurality of devices, and a sensor and / or a switching device provided for each device and connected to the signal line. Element, provided in any device,
A main control unit connected to the signal line, wherein the sensor includes a detection element, a storage unit having its own ID code, a transmission / reception unit for transmitting / receiving data to / from the main control unit via the signal line, The switching device has a switching device for controlling the operation of the mounting component and its own ID code, while having a sensor-side control device for receiving data detected by the device and transmitting the data to the main control device by the transmission / reception device. Storage means, transmitting and receiving means for transmitting and receiving data to and from the main control means via a signal line, and switching element side control means for controlling the switching means based on data from the transmitting and receiving means. .

According to the present invention, the sensor-side control means of the sensor of each device transmits the data detected by the detecting element to the main control means via the signal line by the transmission / reception means. Device data can be imported.

In this case, the sensor stores its own ID in the storage means.
Since the code is retained, the main control means can identify the sensor by connecting the sensor to the signal line, and the wiring of the sensor is completed. Thereby, it is possible to wire the sensor by a so-called plug-in, and it is possible to significantly simplify the wiring. Further, since the common software can be used for the main control means regardless of the number of sensors, the cost can be remarkably reduced by sharing the main control means.

Further, the switching element side control means of the switching element for controlling the operation of the attachment parts of each device controls the switching means based on the data from the main control means received by the transmission / reception means via the signal line. The main control means can control the attachment parts of each device without any trouble.

In this case, since the switching element has its own ID code in the storage means, the main control means can identify the switching element by connecting the switching element to the signal line, and the switching element wiring Is completed. This makes it possible to wire the switching elements by a so-called plug-in,
Significant simplification of wiring can be achieved. Further, since common software can be used for the main control means regardless of the number of switching elements, it is also possible to significantly reduce the cost by sharing the main control means.

Furthermore, since the control of a plurality of devices can be executed by any one of the devices by the main control means, remarkable cost reduction can be achieved by reducing the number of parts as a whole, and the concentration of the plurality of devices can be achieved. Control can be easily realized.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic sectional view of a commercial refrigerator 1A as an embodiment of a device to which the present invention is applied, and FIG. 2 is a wiring diagram of an electric system of the refrigerator 1A. In FIG.
The refrigerator 1A is, for example, a commercial refrigerator installed in a kitchen of a restaurant, and the refrigerator 1A has a main body 5 constituted by a heat insulating box 2 opened on the front surface. A storage room 3 is formed in the heat insulating box 2, and a front opening of the storage room 3 is closed by a door 4 so as to be openable and closable.

In the storage room 3, a cooler 6 constituting a refrigeration cycle of a cooling device and a cooling fan 7 driven by a motor are provided. A dew-proof heater 8 for preventing dew condensation is provided at the opening edge of the heat-insulating box 2, and a door 4 is provided.
An operation panel 11 of a control box 9 as a main control means described later is attached to a front surface of the control box 9.

On the other hand, a machine room 12 is formed below the heat-insulating box 2, and in the machine room 12, the compressor 1 which forms a refrigerating cycle of a cooling device together with the cooler 6 is provided.
3, a condenser 14, a condenser fan 16, and the like. When the compressor 13 is operated, the high-temperature and high-pressure refrigerant discharged from the compressor 13 is radiated and condensed by the condenser 14, decompressed by a decompression device (not shown), and then supplied to the cooler 6. In the cooler 6, the refrigerant evaporates and exerts a cooling function. Thereafter, the low-temperature gas refrigerant returns to the compressor 13 again. Cooling fan 7
Is operated, the cool air cooled by the cooler 6 is transferred to the storage room 3.
, Whereby the inside of the storage room 3 is cooled. In addition, when the condenser fan 16 is operated, outside air flows through the condenser 14 and the compressor 13, so that these are air-cooled. Further, when the dew-proof heater 8 is energized, the opening edge of the heat insulating box 2 is heated to prevent dew condensation.

In FIG. 2, reference numeral 21 denotes an AC power supply line wired in the main body 5 of the cooling storage 1, and reference numeral 22 denotes a signal line for transmitting and receiving data. The control box 9 is connected to the AC power supply line 21 and the signal line 22, and the drive board 23 of the compressor 13, the power supply board 24 of each of the fans 7, 16 and the power supply board 26 of the anti-dew heater 8 are connected to an AC power supply. Connected to line 21.

The signal line 22 has a chip-shaped temperature sensor 27 and chip-shaped switching elements 28 attached to the drive board 23 and power supply boards 24 and 26, respectively.
Are connected via connectors. here,
Although one switching element 28 is shown on the power supply board 24, it is actually provided for each of the fans 7 and 16.

In the embodiment, the drive board 23 and the power supply boards 24 and 26 are composed of the compressor 13, the fans 7, 1
6 and the dew-proof heater 8, the drive board 23 and the power supply boards 24 and 26 are combined with the respective switching elements 28 together with the compressor 1
3, a configuration in which each of the fans 7 and 16 and the dew-proof heater 8 are built-in. In a model such as the compressor 13 which needs to detect the temperature, the temperature sensor 27 is also built in the compressor 13.

According to such a configuration, the wiring of these mounting parts can be achieved simply by connecting the switching element 28 and the temperature sensor 27 incorporated in the compressor 13, the fans 7, 16 or the dew-proof heater 8 to the connector of the signal line 22. Since it is completed, assembly and wiring workability is further improved.

In the restaurant kitchen, there is also a refrigerator 1
B and 1C are installed, and these structures are the same as the refrigerator 1A except for the control box 9 and the operation panel 11 (shown in FIG. 3).

FIG. 3 shows the structure of the control box 9 provided in the refrigerator 1A. The control box 9 is provided with a controller (substrate) 36. The controller 36 includes a CPU (microcomputer) 31, a memory 32 as storage means,
It comprises an I / O interface 33 and a bus I / O interface 34 as a transmission / reception means. The control box 9 has a display 37 composed of an LED or the like, and a switch 3 as an input means.
8 and the like, and the indicator 37 and the switch 38 are provided.
Are connected to the I / O interface 33 and arranged on the operation panel 11.

The bus I / O interface 3
Numeral 4 is connected to the signal line 22, and exchanges data with the temperature sensor 27, the switching elements 28,... Via the signal line 22. Here, the signal line 22 is connected to another refrigerator 1B, 1
Refrigerator 1B and Refrigerator 1C
Are connected to the controller 36 via the signal line 22 as shown in FIG.
The bus I / O interface 34 is connected to the

A predetermined communication protocol for performing data communication with the temperature sensor 27 and the switching element 28 and software for identifying the temperature sensor 27 and the switching element 28 are set in the controller 36.

Next, as shown in detail in FIG. 4, the temperature sensor 27 includes a control unit 61 as a sensor-side control unit, a memory 62, an I / O interface 63, a sensor unit 64, a TH register 66, , A TL register 67, a setting register 68 for determining a state, a CRC generator 69 for ensuring communication consistency, a power supply detecting section 71 for detecting a Vcc power supply described later, a capacitor 72, diodes 73 and 73, and the like. Have been.

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.
Then, the input terminal 76 is connected to the signal line 22, and the capacitor 72 is also connected to the I / O interface 63. For example, a potential (high potential) of +5 V and 0
Data is generated and transmitted by a pulse signal composed of V (low potential).

When the temperature sensor 27 is connected to the signal line 22, power is supplied to each element as long as the high-potential and low-potential pulse signals constituting the data are at the high potential, and the capacitor 72 is connected. Is also charged. Then, while the potential is low, the capacitor 72 discharges power to supply power to each element.

The temperature sensor 27 has Vcc (DC + 5)
V) A power supply terminal 77 is also provided and connected to the diode 74.
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 27 at the time of inspection or the like.

Further, the control unit 61 takes in the temperature data in the refrigerator detected by the sensor unit 64 and temporarily writes the data in the memory 62. Then, when polling is performed from the controller 36 by the I / O interface 63, the temperature data written in the memory 62 is transferred to the I / O interface 63.
To the controller 36.

Here, the ID code of the temperature sensor 27 itself and identification data indicating that the sensor is a sensor are written in the I / O interface 63, the upper limit temperature TH of the refrigerator in the TH register 66, and the TL register 67. Is written with the lower limit temperature TL. The memory 62 stores a communication protocol and the like for performing data communication with the controller 36. If a failure has occurred in the temperature sensor 27, the failure data is also stored in the memory 6.
2 and transmitted to the controller 36. Further, the temperature sensor 27 has a self-holding function for holding the current state when communication with the controller 36 is interrupted.

On the other hand, the structure of the switching element 28 is shown in FIG. The switching element 28 includes a control unit 81 as a switching element side control unit, a data memory (data storage unit) 82, a memory 83, an I / O interface 84, an input / output unit 86, and an input / output unit 86 in an input state. A state storage unit 87 for storing whether the state is an output state or an output state; an ID unit 88 (ID storage means) 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 switching element 28 is connected to the signal line 22, the high potential and the low potential constituting data are connected as described above. While the potential pulse signal is 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 switching element 28 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, each element of the switching element 28 The operation can be performed also by the power supply from the power supply line.
That is, in this case, each element operates without filling the capacitor 89, so that convenience is improved when it is desired to quickly operate the switching element 28 at the time of inspection or the like.

Further, when ON / OFF data (control data) is transmitted from the controller 36 via the signal line 22 by the I / O interface 84, the control unit 81 receives an input based on the ON / OFF data. Input / output terminals 96, 96 (with two terminals) are turned ON / OF by output unit 86
F.

The ID section 88 stores the ID code of the switching element 28 itself and the identification data indicating that it is a switching element as described above, and the data memory 82 stores the compressor 13 controlled by the switching element 28.
And the power consumption data of each fan 7, 16 and dew-proof heater 8,
Also stored are various other data, a communication protocol for performing data communication with the controller 36, and the like.

When a failure occurs in the switching element 28, the data is also written to the data memory 82 and transmitted to the controller 36. Further, the switching element 28 also has a self-holding function for holding the current state when communication with the controller 36 is interrupted.

The switching element 28 is wired on the substrate 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, and 104 is a capacitor as a power storage element.

In this case, the capacitor 104 is connected to the output side of the diode 103, and the resistor 102 and the photodiode 101 are connected between the connection point between the diode 103 and the capacitor 104 and the input / output terminal 96 of the switching element 28.
A is connected in series. The Vcc power supply terminal 94 of the switching element 28 is connected before the diode 103. The photo triac 101B is powered by AC power.
And an AC control element (such as a thyristor) 106. The operation of the compressor 13, the fans 7, 16 and the dew-proof heater 8 is controlled by the AC control element 106.

Here, when the diode 103 is connected to the signal line 22, 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 operation of the above configuration will be described. First, the controller 3 is connected to the signal line 22 wired to the refrigerator 1A.
6 and the temperature sensor 27 and the switching elements 28 of the refrigerator 1A are connected. Then, at the installation site, the temperature sensor 27 and the switching element 28 of the refrigerator 1B and the refrigerator 1C. .. is connected to controller 36 via signal line 22
Is connected to the CPU of the controller 36.
Reference numeral 31 denotes each element (refrigerators 1A, 1B,
1C temperature sensor 27, switching element 28, etc.
・) Scan the connection status.

The temperature sensor 27 and the switching element 28 return their own ID codes to the polling from the controller 36 as described above. The CPU 31 of the controller 36 identifies the connection status between the temperature sensor 27 and the switching elements 28 by the returned ID code, and stores it in the memory 32. Thereafter, data is transmitted to each element using this ID code. Will be sent.

Next, the actual control operation will be described. The controller 36 is provided with a TH register 66 and a TL register 67 of the temperature sensors 27 of each refrigerator 1A, 1B, 1C.
The upper limit temperature TH and the lower limit temperature TL are fetched and stored in the memory 32 to form a data table.

The controller 36 controls each refrigerator 1A,
The power consumption data of the compressor 13, the fans 7, 16 and the dew-proof heater 8 in the data memory 82 of each of the switching elements 28, 1B, 1C,... .

The controller 36 controls each refrigerator 1
Polling is performed to the temperature sensors 27,... Of A, 1B, and 1C. In response to the polling, the control unit 61 of the temperature sensor 27 transmits the temperature data written in the memory 62 to the controller 36 through the interface 63. The controller 36 receives the temperature data and stores it in the memory 3.
Write to 2.

Then, the upper limit temperature TH and the lower limit temperature TL in the data table are compared with the fetched temperature data (internal temperature), and when the internal temperature reaches the upper limit temperature, the switching element 28 is turned on. When the internal temperature falls to the lower limit temperature, data for turning off the switching element 28 is created and transmitted. The temperature comparison is performed by comparing the upper limit temperature and the lower limit temperature of each of the refrigerators 1A, 1B, and 1C with the temperature data sent from the temperature sensor 27 of the refrigerator.

Further, ON / OF of the switching element 28
Refrigerators 1A, 1B, 1
This is transmitted to the switching element 28 of C. The ID code described above is used for this data transmission. Thus, the temperature of all the refrigerators 1A, 1B, and 1C is independently controlled by the controller 36 of the refrigerator 1A.

Here, the switching element 28 as described above is used.
When controlling the controller 32, the controller 36
Each of the refrigerators 1A, 1B or 1C to be operated with reference to a data table of power consumption data formed in the refrigerator.
Compressor 13, each fan 7, 16 and dew-proof heater 8
Is calculated. Then, it is determined whether or not the calculated amount of power exceeds the maximum value (peak power) allowed in the store.

In this case, if the calculated total power consumption exceeds the maximum value, the compressor 13, the fans 7, 16, and the dew prevention heater 8 are activated so that the total power consumption does not exceed the maximum value.
Perform stop control. That is, for example, each refrigerator 1A, 1B, 1
In the case where the compressors 13 of C are started at the same time, the start timing is shifted to start, thereby reducing the excessive starting current and executing the demand control. The demand control is performed based on a predetermined priority (for example, the cooling of the refrigerator 1A is performed by the refrigerator 1A).
B, 1C, etc.).

By performing such control, the amount of power consumption of the refrigerators 1A, 1B, and 1C of the restaurant (store) concerned is suppressed, or the peak value is reduced (leveling of power) to achieve remarkable energy saving. It becomes possible.

In the embodiment, a plurality of refrigerators have been described as an example. However, the present invention is not limited to this, and it is also possible to control in-store lighting and air conditioning. Although a temperature sensor is used as the sensor, a humidity sensor or a pressure sensor may be used without being limited thereto.

[0051]

As described above in detail, according to the present invention, the sensor-side control means of the sensor of each device transmits the data detected by the detection element to the main control means via the signal line by the transmission / reception means. The main control means can take in data of each device without any trouble.

In this case, the sensor stores its own ID in the storage means.
Since the code is retained, the main control means can identify the sensor by connecting the sensor to the signal line, and the wiring of the sensor is completed. Thereby, it is possible to wire the sensor by a so-called plug-in, and it is possible to significantly simplify the wiring. Further, since the common software can be used for the main control means regardless of the number of sensors, the cost can be remarkably reduced by sharing the main control means.

Further, the switching element side control means of the switching element for controlling the operation of the attachment parts of each device controls the switching means based on the data from the main control means received by the transmission / reception means via the signal line. The main control means can control the attachment parts of each device without any trouble.

In this case, since the switching element has its own ID code in the storage means, by connecting the switching element to the signal line, the main control means can identify the switching element, and the wiring of the switching element Is completed. This makes it possible to wire the switching elements by a so-called plug-in,
Significant simplification of wiring can be achieved. Further, since common software can be used for the main control means regardless of the number of switching elements, it is also possible to significantly reduce the cost by sharing the main control means.

Further, since the control of a plurality of devices can be executed by any one of the devices by the main control means, remarkable cost reduction can be achieved by reducing the number of parts as a whole, and the concentration of the plurality of devices can be achieved. Control can be easily realized.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a commercial refrigerator as an embodiment of a device to which the present invention is applied.

FIG. 2 is an electrical wiring diagram of the refrigerator of FIG. 1;

FIG. 3 is a block diagram of an electric circuit of another refrigerator and a control box.

FIG. 4 is a block diagram of an electric circuit of the temperature sensor.

FIG. 5 is a block diagram of an electric circuit of the switching element.

FIG. 6 is an electric circuit diagram of a switching unit using a switching element.

[Explanation of symbols]

 1A, 1B, 1C Refrigerator 7 Cooling fan 8 Dew-proof heater 9 Control box 13 Compressor 14 Condenser 16 Condenser fan 22 Signal line 27 Temperature sensor 28 Switching element 31 CPU 32 Memory 34 Bus I / O interface 36 Controller 61 Control unit 63 , 84 I / O interface 64 Sensor unit 81 Control unit 82 Data memory 86 Input / output unit 88 ID unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsumi Maekawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kazuya Imamura 2--5 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Tsutomu Ishikura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3L045 AA02 BA01 CA02 DA02 EA01 LA00 MA00 NA00 PA02 PA04 PA06 5H215 AA11 AA20 BB01 CC02 CC07 CC09 CX01 CX05 GG02 KK04

Claims (1)

[Claims] 1. A signal line wired across a plurality of devices, a sensor and / or a switching element provided in each device and connected to the signal line, and the signal line provided in any one of the devices. A main control unit connected to a line, the sensor includes a detection element, a storage unit having its own ID code, and a transmission / reception unit that transmits and receives data to and from the main control unit via the signal line. And sensor-side control means for receiving the data detected by the detection element and transmitting the data to the main control means by the transmission / reception means, wherein the switching element is a switching means for controlling the operation of the mounting component, and Storage means having an ID code for transmitting and receiving data to and from the main control means via the signal line; Control device of a device which is characterized in that it comprises a switching element side control means for controlling the switching means.