JP2000199668A - Cooling storage chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage chamber, capable of monitoring the opening and closing of a door smoothly and making the control of a device for monitoring so as to be common with the control of an instrument for cooling operation. SOLUTION: A cooling storage chamber 1 is provided with a cooling device 12 for cooling a storage chamber 3, a door 4 for closing the opening of the storage chamber 3 so as to be free of opening and closing, signal wires arranged in a main body, a main control means connected to the signal wires to transmit and receive data between the main control means and a switch, whose ON-OFF condition is changed in accordance with the opening and closing of the door 4. The detecting device is provided with a memory means, retaining an own ID code, a receiving and transmitting means, transmitting and receiving data between the main control means through the signal wires, and a terminal side control means, reading the condition of the switch and writing the same into the memory means as data while transmitting the data in the memory means to the main control means through 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 cooling refrigerator such as a commercial refrigerator, a household refrigerator, a low-temperature showcase or a prefabricated refrigerator, which is installed in a restaurant kitchen or a hotel guest room, for example.

[0002]

2. Description of the Related Art Conventionally, commercial and domestic refrigerators have a built-in compressor, condenser, cooler and the like constituting a cooling device, or a compressor and a condenser are separately provided and discharged from the compressor. The refrigerant is condensed in a condenser, decompressed by a decompression device, and then supplied to a cooler to exert a cooling effect.Cool air cooled by the cooler is circulated in a refrigerator by a cooling fan to a predetermined level. Cooling to low temperature.

In recent years, prefabricated refrigerators have been installed along the walls of buildings in supermarkets and courier service facilities so that low-temperature articles such as food can be taken in and out through doors provided both outdoors and indoors. There is a so-called pass-through refrigerator. Articles carried by delivery vehicles or the like are stored in a storage room by opening an outdoor door, and the stored articles are taken out by opening an indoor door.

[0004]

In such a pass-through type refrigerator, it is necessary to control the opening and closing of the door, especially on the outdoor side. This is because, in some cases, it may be opened and closed at night and dangerous substances may be thrown in. Therefore, it is necessary to attach a device for monitoring the opening and closing of the door, an alarm device, and the like to the refrigerator.

[0005] In addition to that, the existing compressor, fan, temperature sensor, etc. will be installed,
The wiring work for these electric devices has become extremely complicated, and improvements have been desired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and can smoothly monitor the opening and closing of a door, and can control a device for monitoring and a device for cooling operation. It is intended to provide a common cold storage.

[0007]

SUMMARY OF THE INVENTION The cooling storage of the present invention comprises:
A cooling device for cooling the storage room, a door for opening and closing the opening of the storage room, a signal line wired to the main body, main control means connected to the signal line, and a main line connected to the signal line; A detection device for transmitting and receiving data to and from the control means, and a switch for changing the ON / OFF state in accordance with opening and closing of the door, wherein the detection device has a storage means having its own ID code; Transmitting / receiving means for transmitting and receiving data to and from the main control means via a signal line; terminal-side control means for taking in the state of the switch and writing the data in the storage means, and transmitting the data in the storage means to the main control means by the transmission / reception means And characterized in that:

According to the present invention, the terminal-side control means of the detecting device captures the ON / OFF state of the switch, writes it in the storage means as data, and transmits this data to the main control means via the signal line by the transmission / reception means. Therefore, the main control means of the cooling storage can monitor the open / closed state of the door without any trouble.

In this case, the detecting device stores its own I
Since the D code is possessed, the main control means can identify the detection device by connecting the detection device to the signal line, and the wiring of the detection device is completed. Thus, the detection device can be wired by a so-called plug-in, and the wiring can be significantly simplified. In addition, since it is possible to use common software for the main control means regardless of the number of detection devices and the like, it is also possible to significantly reduce costs due to common use.

A cooling storage according to a second aspect of the present invention includes a switching element connected to the signal line for controlling the operation of the cooling device. The switching element includes switching means for controlling the operation of the cooling device, and switching means for controlling the operation of the cooling device. Storage means holding the ID code, transmission / reception means for exchanging data with the main control means via a signal line, and a terminal for controlling the switching means based on the data from the main control means received by the transmission / reception means Side control means.

According to the second aspect of the present invention, in addition to the above, the terminal side control means of the switching element controls the switching means based on data from the main control means received by the transmission / reception means via the signal line. The main control means of the cooling storage can control the operation of the cooling device without any trouble.

Also 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 can be identified. Wiring is completed. Thus, the switching elements can be wired by so-called plug-in, and the wiring can be significantly simplified. Further, since common software can be used for the main control means regardless of the number of switching elements, the cost can be further reduced by common use.

The cooling storage according to a third aspect of the present invention, in each of the above-mentioned inventions, includes a door locking device and a switching element connected to the signal line for controlling the locking device. Switching means for controlling unlocking, storage means having its own ID code,
Transmitting / receiving means for transmitting / receiving data to / from the main control means via a signal line, and terminal-side control means for controlling the switching means based on data from the main control means received by the transmitting / receiving means. Features.

According to the third aspect of the present invention, in addition to the above inventions, a door locking device is provided, and the terminal side control means of the switching element receives the data from the main control means received by the transmission / reception means via the signal line. Therefore, the main control means of the cooling storage can control the locking / unlocking of the door without any trouble.

Also 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 switching element can be identified. Wiring is completed. Thus, the switching elements can be wired by so-called plug-in, and the wiring can be significantly simplified. Further, since common software can be used for the main control means regardless of the number of switching elements, the cost can be further reduced by common use.

According to a fourth aspect of the present invention, there is provided a cooling storage according to the second aspect.
Or, in claim 3, switching means, storage means,
A transmission / reception unit and a terminal-side control unit. The terminal-side control unit has an output mode and an input mode. In the output mode, the terminal-side control unit controls the switching unit based on data from the main control unit received by the transmission / reception unit. In the input mode, the switching element and the detecting device are constituted by a switching chip which takes the state of the switch by turning off the switching means.

According to the fourth aspect of the present invention, when the terminal-side control means of the switching element constituting the detecting device is set to the input mode, the door open / closed state can be monitored by the main control means according to the first aspect. In the case of the output mode, the switching means is controlled based on data from the main control means received by the transmission / reception means via the signal line, so that the main control means has no trouble as described in claim 2 or 3. And control of the locking device.

That is, the switching element for controlling the cooling device and the locking device can be used also as a detecting device for monitoring the open / closed state of the door, and the cost can be further reduced by using common components. Is achieved.

According to a fifth aspect of the present invention, in the above-described cooling storage, the main control means includes a display means, and when the opening of the door is detected based on data from the detecting device, a predetermined information indicating the fact is displayed on the display means. The display is performed.

According to the fifth aspect of the present invention, in addition to the above-mentioned inventions, the main control means includes a display means, and when the opening of the door is detected by the data from the detecting device, the display means indicates the fact. Is displayed, so that users and maintenance workers can accurately grasp that the door has been opened,
It is possible to prevent theft or the input of dangerous goods from occurring.

According to a sixth aspect of the present invention, there is provided the cooling storage according to the second aspect, the third aspect, the fourth aspect, or the fifth aspect.
The main control means determines the number of times of opening and closing of the door, and changes the operating condition of the cooling device by the switching element according to the number of times of opening and closing per unit time.

According to the sixth aspect of the invention, in addition to the second, third, fourth or fifth aspect of the invention, the main control means determines the number of times the door is opened and closed, and Since the operating condition of the cooling device is changed by the switching element according to the number of times of opening and closing, for example, when the door is not opened or closed, the differential between the upper limit temperature and the lower limit temperature for turning the cooling device ON / OFF is reduced. By performing such control, the temperature of the storage room can be stabilized without increasing the operation rate of the cooling device.

A cooling storage according to a seventh aspect of the present invention includes the alarm device and the switching element connected to the signal line for controlling the alarm device, wherein the switching element controls the operation of the alarm device. Means,
A storage unit having its own ID code, a transmission / reception unit for transmitting / receiving data to / from the main control unit via a signal line, and controlling the switching unit based on data received from the main control unit by the transmission / reception unit. When the main control means detects the opening of the door outside of the designated time by the data from the detection device,
The switching device activates the alarm device.

According to the seventh aspect of the present invention, an alarm device is provided in addition to the above-mentioned inventions, and the terminal side control means of the switching element receives the data from the main control means received by the transmission / reception means via the signal line. Since the switching means for controlling the alarm device is controlled, the main control means of the cooling storage can control the alarm device without any trouble.

Also 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 can be identified. Wiring is completed. Thus, the switching elements can be wired by so-called plug-in, and the wiring can be significantly simplified. Further, since common software can be used for the main control means regardless of the number of switching elements, the cost can be further reduced by common use.

When the main control means detects the opening of the door outside the designated time based on the data from the detection device, the main control means activates the alarm device by the switching element. For example, when the door is opened and closed during a time when it cannot be closed, the alarm device can notify the user or the maintenance worker of the fact.

[0027]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a cooling storage 1 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 cooling storage 1. The cooling storage 1 of the embodiment is, for example, a so-called pass-through type prefabricated refrigerator installed in a supermarket or the like. A storage room 3 is formed in the box 2.

The outdoor opening of the storage room 3 is openably and closably closed by heat-insulating doors 4, 4.
The opening on the indoor side is similarly closed by a heat-insulating door 11, 11 so that it can be opened and closed freely. In addition, the doors 4
A locking device 15 (FIG. 2) for unlocking is attached, and door switches 20 and 21 (FIG. 2) for detecting opening and closing of the doors 4, 4 and 11, 11 are respectively provided on the heat insulating box 2. Provided. The cooling storage 1 is also provided with an alarm device 8 (FIG. 2) including a buzzer or the like.

In the storage room 3, a cooler 6 and a cooling fan 7 constituting a refrigeration cycle of the cooling device 12 are arranged.
Reference numeral 13 denotes a compressor which forms a refrigerating cycle of the cooling device 12 together with the cooler 6, reference numeral 14 denotes a condenser, and reference numeral 16 denotes a capillary tube.

In the storage room 3, articles such as food are stored by opening and closing the doors 4 on the outdoor side. The doors 11 on the indoor side are opened and closed to take out the articles. When the compressor 13 is operated, the cooler 6
Exerts a cooling action. The air in the storage room 3 cooled by the cooler 6 is circulated in the storage room 3 by the cooling fan 7, whereby articles such as food in the storage room 3 are cooled to a predetermined low temperature (refrigerated or frozen temperature). Is to be cooled.

Next, in FIG. 2, reference numeral 22 denotes a signal line for transmitting and receiving data, which is wired to the heat insulating box 2. The control box 9 is connected to the signal line 22. The control box 9 is installed in a store management room or the like. The power supply board 24 of the compressor 13, the cooling fan 7, the locking device 15, and the alarm device 8 is connected to an AC power line (not shown).

The signal line 22 has a chip-shaped storage device (memory chip) 25 (disposed on the power supply board 24).
A temperature sensor 27 for detecting the temperature in the storage room 3;
The chip-like switching elements 28 attached to the power supply board 24, and the switching elements 28, 28 used as a detection device as described later are respectively connected via connectors.

The structure of the control box 9 is shown in FIG.
Shown in The control box 9 is provided with a controller (substrate) 36 constituting main control means. This controller 36 is a CPU (microcomputer)
31, a memory 32 as storage means, an I / O interface 33, a bus I / O interface 34 as transmission / reception means, and the like. Further, the control box 9 is provided with a display 37 constituted by a liquid crystal display panel, a switch 38 as input means (keyboard, mouse, etc.), a switch 39 as switching means, and the like. 37 and switch 38 are I /
It is connected to the O interface 33 and disposed on an operation panel (not shown) provided in a management room or the like.

The bus I / O interface 3
4 is connected to the signal line 22 via the switch 39, and is connected to the storage device 25 and the internal temperature sensor 2 via the signal line 22.
7. Data is exchanged with the switching elements 28. An external laptop PC P (an external control device having a display, a keyboard, a mouse, and the like) and a modem M connected to an external telephone line are connected to the switch 39 via a communication line 42.

The switch 39 always connects the bus I / O interface 34 to the signal line 22, but the bus I / O interface 34 is instructed by the controller 36 or the personal computer P.
Interface 34 (ie control box 9)
Is disconnected from the signal line 22 and connected to the personal computer P and the modem M, and also functions to connect the personal computer P to the signal line 22.

The controller 36 includes an internal temperature sensor 270, a switching element 28, a predetermined communication protocol for performing data communication with the storage device 25 and the personal computer P, and an internal temperature sensor 27 and a switching element to be described later. .., Software for searching and identifying the storage device 25, image data to be displayed on the display 37, and the like are set.

The personal computer P also has an internal temperature sensor 27, a switching element 28, a storage device 25 and a controller 3.
6 and a predetermined communication protocol for performing data communication with the internal temperature sensor 27 and the switching element 28.
It is assumed that software for searching the storage device 25 for identification is set.

Next, FIG. 4 shows the configuration of the inside temperature sensor 27. The internal temperature sensor 27 includes a CPU 43 as a sensor-side control unit and a memory 44 as a storage unit.
And an I / O interface 46 as transmission / reception means
, An A / D converter 47, a sensor unit 48 as a detection element connected to the A / D converter 47, a capacitor 49 as a power storage element, and a diode 5 as a rectifying element.
1 and the like.

In this case, the capacitor 49 is connected to the diode 5
1, and each element is connected to a connection point between the diode 51 and the capacitor 49. Signal line 2
2, a potential (high potential) of, for example, +5 V is applied, and the data is composed of pulses that fall from the high potential to a low potential of 0 V, for example.

Then, the internal temperature sensor 27 is connected to the signal line 22.
When the high-potential and low-potential pulse signals constituting data are at the high potential, power is supplied to each element as it is, and the capacitor 49 is also charged. And
During the low potential, the capacitor 49 discharges,
The power supply of each element is provided.

The internal temperature sensor 27 has Vcc (DC
+ 5V) A power supply terminal 45 is also provided, which is connected to the connection point between the diode 51 and the capacitor 49. If the Vcc power supply terminal 45 is connected to a power supply line, each element is connected to the power supply line. It is configured to be able to operate also by the power supply of. That is, in this case, each element operates without charging the capacitor 49, so that convenience is improved when it is desired to quickly operate the internal temperature sensor 27 at the time of inspection or the like.

The CPU 43 fetches the temperature data detected by the sensor unit 48 via the A / D converter 47, and temporarily writes the data into the memory 44. Then, the controller 36 is connected to the controller 36 via the signal line 22 by the I / O interface 46.
, The temperature data written in the memory 44 is transferred to the signal line 2 by the I / O interface 46.
2 to the controller 36.

Here, the internal temperature sensor 2 is stored in the memory 44.
7 stores an ID code of itself, identification data indicating that the sensor is a sensor, set value data such as a low temperature / high temperature alarm temperature, a protocol for performing data communication with the controller 36, and the like. If a failure has occurred in the cleaning tank temperature sensor 27, the failure data is also written to the memory 44 and transmitted to the controller 36.

On the other hand, FIG. 5 shows the configuration of the switching element 28 provided on the power supply board 24 for controlling the compressor 13, the cooling fan 7, the locking device 15 and the alarm device 8, respectively. The switching element 28 includes a CPU 58 as terminal-side control means, a memory 59 as storage means, an I / O interface 61 as transmission / reception means, an I / O interface 62 as a driver, and an I / O interface 62 as a driver. It is composed of a transistor 63 connected as switching means, a capacitor 64 serving as a power storage element, and diodes 66 and 67 serving as rectifying elements.

In this case, the capacitor 64 is connected to the diode 6
6, and each element is connected to a connection point between the diode 66 and the capacitor 64. When the switching element 28 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 data are at the high potential as described above, and the capacitor 64 is also supplied to the capacitor 64. Charged. While the potential is low, the capacitor 64 discharges power to supply power to each element.

The switching element 28 is also provided with a Vcc (DC + 5V) power supply terminal 55 connected to the connection point between the diode 66 and the capacitor 64, as shown by the broken line in FIG. If connected, each element of the switching element 28 can operate even by power supply from the power supply line. That is, in this case, each element operates without charging the capacitor 64.
The convenience is improved when the user wants to operate the camera 8 quickly.

The CPU 58 is switchable between an output mode and an input mode, and the switching element 28 provided on the power supply board 24 is in the output mode. In this output mode, when ON / OFF data is transmitted from the controller 36 via the signal line 22 by the I / O interface 61, this ON / OF
The transistor 63 is turned on / off by the I / O interface 62 based on the F data. The collector terminal of the transistor 63 (indicated by S2 in FIG. 5) and I
The / O interface 62 is connected via a diode 67.

Here, the memory 59 stores an ID code of the switching element 28 itself, identification data indicating that the element is a switching element, a protocol for performing data communication with the controller 36, and the like. If a failure has occurred in the switching element 28, the data is also written into the memory 59, and the controller 36
Sent to.

The switching element 28 is connected to the power supply board 24
The above is wired as shown in FIG. That is, 69 is a photodiode 69A
And a phototriac 69B, 71 is a resistor, 72 is a diode as a rectifying element,
73 is a capacitor 74 as a storage element.

In this case, the capacitor 74 is connected to the diode 7
The resistor 71 and the photodiode 69A are connected in series between the connection point of the diode 72 and the capacitor 74 and the collector terminal (S2 in FIG. 5) of the transistor 63 of the switching element 28. The terminal S1 (FIG. 5) of the switching element 28 is connected to a diode 72.
Connected in front of And Photo Triac 69
B is interposed between the AC power line and the compressor 13, the cooling fan 7, the locking device 15, and the alarm device 8, respectively.

When the diode 72 is connected to the signal line 22, power is supplied to the photodiode 69A via the resistor 71 as long as the high-potential and low-potential pulse signals constituting data are at the high potential. , The capacitor 74 is also charged. While the potential is low, the capacitor 74 is discharged from the capacitor 74 to supply power to the photodiode 69A.

Similarly, the diode 72 and the capacitor 7
Vcc power supply terminal 60 is connected to the connection point
If the power supply terminal 60 is connected to the power supply line, the photodiode 69A can operate even by power supply from the power supply line. That is, in this case, each element operates without charging the capacitor 74,
Convenience is improved when it is desired to operate quickly at the time of inspection or the like.

Next, FIG. 7 shows the configuration of the switching element 28 used as a detecting device as described above. Note that the configuration of the switching element 28 itself is the same as that of FIG.
Description is omitted. In this case, the collector terminal of the transistor 63 of the switching 28 (terminal S2 in FIG. 7),
An input side of the diode 67 is connected to a connection point between the resistor 76 and the door switches 20 and 21 connected in series between the Vcc power supply and the ground.

The door switch 20 opens the contacts when the doors 4 and 4 are opened (OFF), and closes the contacts when the doors 4 and 4 are closed (ON). Switching element 28
Is connected to the door switch 20 and constitutes a door sensor together with the door switch 20. The door switch 21 is the door 1
When the terminals 1 and 11 are opened, the contacts are opened (OFF), and the door 1 is opened.
When the switches 1 and 11 are closed, the contacts are closed (ON). The switching element 28 is connected to the door switch 21 and forms a door sensor together with the door switch 21.

In this case, the CPU 58 is set to the input mode. In this input mode, the CPU 58 turns off the transistor 63 to disable its operation, and takes in the potential of the terminal S2 via the diode 67. Then, whether the potential of the terminal S2 is the high potential “H” or the low potential “L” is written in the memory 59.

Then, when polling is performed by the controller 36 via the signal line 22 by the I / O interface 61, “H” and “L” written in the memory 59 are obtained.
Data (data on the state of the door switch)
The signal is transmitted to the controller 36 via the signal line 22 by the interface 61.

The operation of the above configuration will be described. First, it is assumed that the personal computer P is not connected to the switch 39 first. Internal temperature sensor 27 and switching element 28
Is connected to the signal line 22, the controller 36 (CPU 31) first searches for the connection status of each element (the internal temperature sensor 27, the switching element 28,..., The storage device 25) to the signal line 22. .

In this case, the controller 36 makes an ID request to all of the internal temperature sensor 27, the switching elements 28,..., And the storage device 25, and in response to this, the sensor 27, the switching elements 28,. Is returned to the controller 36. Controller 3
Reference numeral 6 denotes a storage device 25 and an internal temperature sensor 27 connected to the signal line 22 based on the returned ID code and the like, a switching element 28 for the compressor 13, and a cooling fan 7.
Switching element 28 for the locking device 15, switching element 28 for the alarm device 8,
It recognizes that each switching element of the switching element 28 for the door switch 20 is connected.

The controller 36 stores the connection status of the recognized internal temperature sensor 27, the switching element 28, and the storage device 25 in the memory 32.
Data is transmitted to each element using the D code.

Next, in the inspection at the time of construction, the personal computer P is connected to the switch 39. At this time, the controller 36 is disconnected from the signal line 22 as described above. In this state, the storage device 25 is transmitted from the personal computer P via the signal line 22.
The type, control method and function (each temperature) of the cooling storage 1
Send parameters (data) such as Storage device 25
Holds the parameter data transmitted from the personal computer P.

Thereafter, the personal computer P is disconnected from the switch 39, and the controller 36 is connected to the signal line 22 again.
When the controller 36 is connected to the signal line 22, the controller 36 accesses the storage device 25, reads out the written parameters from the storage device 25, and
Hold at 2. Thus, the setting of the parameters from the personal computer P to the controller 36 is completed.

Next, the controller 36 is turned ON / OFF.
The data is transmitted to the signal line 22 together with the ID codes of the switching elements 28.
3. Controls the cooling fan 7 and the like, and controls the inside temperature sensor 27 and the switching elements 28 of the door switches 20 and 21.
And the following operation is performed.

That is, as described above, the CPU 31 of the controller 36 controls the internal temperature sensor 27 and the switching element 28.
Perform polling at a predetermined cycle. This polling is performed based on the above-mentioned ID code. The CPU 43 of the internal temperature sensor 27 transmits the temperature data to the controller 36 in response to the polling as described above. The CPU 31 of the controller 36 once writes the received temperature data in the memory 32, compares the temperature data with the set temperature in the parameters set as described above, and turns ON / OFF.
The OFF data is transmitted to the signal line 22 together with the ID code of the switching element 28 of the compressor 13.

Switching element 28 of compressor 13
CPU 58 receives ON / OFF data of its own ID code, and turns ON / OFF the transistor 63 based on the received data. ON of this transistor 63
By turning on / off, the photodiode 69A is turned on (light emission) / OFF (turns off), whereby the phototriac 69B is turned on / off, whereby the compressor 13 is operated / stopped.

In this case, the controller 36 has a predetermined differential (for example, 2 deg) above and below the set temperature with an upper limit temperature and a lower limit temperature (the difference between them is 4 ° C.)
When the temperature data from the internal temperature sensor 27 rises to the upper limit temperature, the compressor 13 is operated,
When the temperature drops to the lower limit temperature, the compressor 13 is stopped.

The CPU 31 of the controller 36
The ON data is transferred to the I of the switching element 28 of the cooling fan 7.
The signal is transmitted to the signal line 22 together with the D code, and the cooling fan 7 is continuously operated. Thereby, the inside of the storage room 3 is maintained at the set temperature on average.

Next, when the doors 4 and 4 are opened to deliver the goods carried by the delivery vehicle or the like to the storage room 3,
Since the contact of the door switch 20 is opened, the terminal S2 in FIG.
Becomes “H”. As a result, the data held by the switching element 28 becomes “H”. This data is taken into the controller 36 at the next polling as described above.

When the controller 36 detects the opening of the door 4 by exchanging data with the switching element 28 of the door switch 20, it stores these data in the storage device 25 and opens a window as shown in FIG. , The doors 4 and 4 are opened and the contacts are opened. Therefore, the user and the maintenance worker can properly recognize that the doors 4 and 4 have been opened.

When the doors 11 are opened by the user to take out the articles, the door switch 2 is similarly opened.
The opening of the doors 11 and 11 is detected by 1, and a display (which is distinguished from the door switch 4) is similarly performed.

The controller 36 controls these doors 4,
The elapsed time since opening of 4, 11, and 11 is integrated, and when the opening is continued for a predetermined time (for example, 5 minutes), the alarm device 8 is operated. Also in this case, the controller 36 transmits ON / OFF data (in this case, ON data) to the signal line 22 together with the ID code of the switching element 28 of the alarm device 8.

The CP of the switching element 28 of the alarm device 8
When U58 receives ON data of its own ID code,
Based on this, the transistor 63 is turned on as described above. When the transistor 63 is turned on, the photodiode 69A is turned on (light is emitted, and thereby, the phototriac 69B is turned on.
Is operated (ringed).

By the sounding of the alarm device 8, the trader or the user can quickly recognize that the doors 4, 4, or 11, 11 have been kept open, and the cooling capacity is reduced due to forgetting to close the door or the theft is prevented. Occurrence can be avoided. Doors 4, 4, 1
When all the switches 1 and 11 are closed, the controller 36 stops the alarm device 8.

The controller 36 accumulates the number of times the doors 4, 4 and 11, 11 are opened and closed per unit time (for example, one hour). If the number of times is smaller than a predetermined number, the above-mentioned differential is decremented by 1 deg. To shrink. Thereby, the difference between the upper limit temperature and the lower limit temperature is 2 ° C.

Here, when the doors 4, 4, 11, 11 are not opened or closed, the entry of articles (heat load) into the storage room 3 and the invasion of outside air are small. Therefore, the compressor 13
Stop, the temperature in the storage room 3 is hard to rise,
Frequent compressor 1 even if differential is reduced
3 can be avoided. On the other hand, the temperature fluctuation range in the storage room 3 is reduced and becomes extremely stable.

Next, assuming that the business hours of the store are, for example, AM 10:00 to PM 8:00, the controller 36 determines that the business hours of PM 8:00 to AM 10: 0 are outside business hours.
The doors 4 and 4 are locked by the locking device 15 until 0. Also in this case, the controller 36 sends ON / OFF data (in this case, ON data) to the switching element 2 of the locking device 15.
8 and transmitted to the signal line 22 together with the ID code.

C of the switching element 28 of the locking device 15
When receiving the ON data of its own ID code, the PU 58 turns on the transistor 63 based on the received data as described above.
I do. When the transistor 63 is turned on, the photodiode 69A is turned on (emit light, whereby the phototriac 69B is turned on, whereby the locking device 15 locks the doors 4,4.

The locking / unlocking of the locking device 15 can also be executed by a manual operation from the controller 36.

Next, when the doors 4 and 4 are opened outside the business hours, the contacts of the door switch 20 are opened, so that the potential of the terminal S2 in FIG. 7 similarly becomes "H". As a result, the data held by the switching element 28 becomes “H”. This data is taken into the controller 36 at the next polling as described above.

When the controller 36 detects the opening of the door 4 by exchanging data with the switching element 28 of the door switch 20, it stores these data in the storage device 25 and opens a window as shown in FIG. , The doors 4 and 4 are opened and the contacts are opened. Therefore, the user and the maintenance worker can properly recognize that the doors 4 and 4 have been opened.

At the same time, the controller 36 makes the alarm device 8 sound, connects the circuit to the modem M by the switch 39, and notifies the affiliated security company using the modem M. As a result, it is possible to report that the doors 4 on the outdoor side have been opened outside of business hours, and it is possible to prevent theft or the like from occurring.

Although the embodiment has been described by taking a pass-through type prefabricated refrigerator used in a supermarket or the like as an example, the present invention is also effective for a refrigerator provided in a guest room such as a hotel.

[0082]

As described above in detail, according to the present invention, the terminal-side control means of the detection device fetches the ON / OFF state of the switch, writes the data in the storage means as data, and sends and receives the data via the signal line by the transmission / reception means. Since this data is transmitted to the control means, the main control means of the cooling storage can monitor the open / closed state of the door without any trouble.

In this case, the detecting device stores its own I
Since the D code is possessed, the main control means can identify the detection device by connecting the detection device to the signal line, and the wiring of the detection device is completed. Thus, the detection device can be wired by a so-called plug-in, and the wiring can be significantly simplified. In addition, since it is possible to use common software for the main control means regardless of the number of detection devices and the like, it is also possible to significantly reduce costs due to common use.

According to the second aspect of the present invention, in addition to the above, the terminal side control means of the switching element controls the switching means based on data from the main control means received by the transmission / reception means via the signal line. The main control means of the cooling storage can control the operation of the cooling device without any trouble.

Also 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 can be identified. Wiring is completed. Thus, the switching elements can be wired by so-called plug-in, and the wiring can be significantly simplified. Further, since common software can be used for the main control means regardless of the number of switching elements, the cost can be further reduced by common use.

According to the third aspect of the present invention, in addition to the above-mentioned inventions, a door locking device is provided, and the terminal side control means of the switching element receives data from the main control means received by the transmission / reception means via a signal line. Therefore, the main control means of the cooling storage can control the locking / unlocking of the door without any trouble.

Also 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. Wiring is completed. Thus, the switching elements can be wired by so-called plug-in, and the wiring can be significantly simplified. Further, since common software can be used for the main control means regardless of the number of switching elements, the cost can be further reduced by common use.

According to the fourth aspect of the present invention, when the terminal-side control means of the switching element constituting the detecting device is set to the input mode, it is possible to realize the monitoring of the open / closed state of the door by the main control means. In the case of the output mode, the switching means is controlled based on data from the main control means received by the transmission / reception means via the signal line, so that the main control means has no trouble as described in claim 2 or 3. And control of the locking device.

That is, the switching element for controlling the cooling device and the locking device can be used also as the detecting device for monitoring the open / closed state of the door, and the cost can be further reduced by using common components. Is achieved.

According to the fifth aspect of the present invention, in addition to the above-mentioned inventions, the main control means includes a display means. When the opening of the door is detected by the data from the detecting device, the display means indicates the fact. Is displayed, so that users and maintenance workers can accurately grasp that the door has been opened,
It is possible to prevent theft or the input of dangerous goods from occurring.

According to the sixth aspect of the invention, in addition to the second, third, fourth or fifth aspect of the invention, the main control means determines the number of times the door is opened and closed, and Since the operating condition of the cooling device is changed by the switching element according to the number of times of opening and closing, for example, when the door is not opened or closed, the differential between the upper limit temperature and the lower limit temperature for turning the cooling device ON / OFF is reduced. By performing such control, the temperature of the storage room can be stabilized without increasing the operation rate of the cooling device.

According to the seventh aspect of the present invention, an alarm device is provided in addition to the above-mentioned inventions, and the terminal side control means of the switching element receives the data from the main control means received by the transmission / reception means via the signal line. Since the switching means for controlling the alarm device is controlled, the main control means of the cooling storage can control the alarm device without any trouble.

Also 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. Wiring is completed. Thus, the switching elements can be wired by so-called plug-in, and the wiring can be significantly simplified. Further, since common software can be used for the main control means regardless of the number of switching elements, the cost can be further reduced by common use.

When the main control means detects the opening of the door outside of the designated time based on the data from the detecting device, the switching device activates the alarm device. For example, when the door is opened and closed during a time when it cannot be closed, the alarm device can notify the user or the maintenance worker of the fact.

[Brief description of the drawings]

FIG. 1 is a sectional view of a cooling storage according to an embodiment to which the present invention is applied.

FIG. 2 is a wiring diagram of an electric system of a cooling storage.

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

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

FIG. 5 is a block diagram of an electric circuit of a switching element in an output mode.

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

FIG. 7 is a block diagram of an electric circuit of a switching element in an input mode.

FIG. 8 is a diagram showing a window for a pressure switch displayed on a display of the controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling storage 2 Heat insulation box 3 Storage room 4, 11 Door 7 Cooling fan 8 Alarm device 9 Control box 12 Cooling device 13 Compressor 15 Locking device 20, 21 Door switch 22 Signal line 27 Internal temperature sensor 28 Switching element 31, 43 , 58 CPU 32, 44, 59 Memory 37 Display 39 Switcher 42 Communication line 46, 61 I / O interface 48 Sensor unit 49, 164 Capacitor 51, 66, 67 Diode 63 Transistor 69 Photocoupler 69A Photodiode 69B Phototriac M Modem PC

 ──────────────────────────────────────────────────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 GA07 HA01 HA03 HA07 LA16 LA18 MA02 NA15 NA19 PA04 PA06 3L102 JA03 KB04 KC01

Claims (7)

[Claims] 1. A cooling device for cooling a storage room, a door for opening and closing the opening of the storage room, a signal line wired to a main body, main control means connected to the signal line, A detection device connected to a signal line for transmitting and receiving data to and from the main control unit; and an ON-OF according to opening and closing of the door.
An F state changing switch, wherein the detection device includes a storage unit having its own ID code, a transmission / reception unit that exchanges data with the main control unit via a signal line, and a state of the switch. And a terminal-side control means for receiving the data, writing the data in the storage means, and transmitting the data in the storage means to the main control means by the transmission / reception means. And a switching element connected to the signal line for controlling the operation of the cooling device, the switching element controlling the operation of the cooling device, and a storage device having its own ID code. A transmission / reception unit for transmitting / receiving data to / from the main control unit via a signal line, and a terminal-side control unit for controlling the switching unit based on data received from the main control unit by the transmission / reception unit. 2. The cooling storage according to claim 1, wherein: 3. A locking device for a door, and a switching element connected to a signal line for controlling the locking device, the switching device comprising: a switching unit for controlling locking and unlocking of the locking device; Storage means holding an ID code, transmitting / receiving means for transmitting / receiving data to / from the main control means via a signal line, and a terminal for controlling the switching means based on data from the main control means received by the transmitting / receiving means 3. The cooling storage according to claim 1, further comprising a side control unit. 4. A control device comprising a switching unit, a storage unit, a transmission / reception unit, and a terminal-side control unit. The terminal-side control unit has an output mode and an input mode. In the output mode, a main control received by the transmission / reception unit is provided. 3. A switching element and a detecting device comprising a switching chip which controls the switching means based on data from the means and, in an input mode, turns off the switching means and captures a state of a switch.
Or the cooling storage of claim 3. 5. The main control means includes a display means, and when an opening of the door is detected based on data from the detecting device, a predetermined display to that effect is displayed on the display means. The cooling storage according to claim 2, 3, or 4. 6. The main control means determines the number of times the door is opened and closed,
6. The cooling storage according to claim 2, wherein the operating condition of the cooling device is changed by the switching element according to the number of times of opening / closing per unit time. 7. An alarm device, comprising: a switching element connected to the signal line for controlling the alarm device, wherein the switching element has switching means for controlling the operation of the alarm device and own ID code. Storage means, transmitting / receiving means for transmitting / receiving data to / from the main control means via a signal line, and terminal-side control means for controlling the switching means based on data from the main control means received by the transmitting / receiving means. The apparatus according to claim 1, wherein the main control means operates the alarm device by the switching element when the door is detected outside the designated time period based on data from the detection device. The cooling storage according to any one of claims 2, 3, 4, 5, and 6.