JP2000330649A - Temperature controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make components common and the constitution simple and to make the controller small-sized by setting an upper- and a lower-limit temperature by a setting means, comparing data from a temperature sensor with the set values, and controlling a switching element. SOLUTION: A temperature controller 9 provided in a refrigerator, etc., has a thermostat chip 21, which compares the in-refrigerator temperature TP sent from the temperature sensor 42 through a signal line 22 with the upper-limit temperature 12 deg.C and lower-limit temperature 8 deg.C set by, for example, a variable resistor 47 to turn the switching element 26 on when the in-refrigerator temperature TP reaches 12 deg.C and off when the in-refrigerator temperature TP reaches 8 deg.C. When the switching element 26 is turned on, a compressor 13 and a motor 7M are energized through a relay 27 and actuated and when the switching element 26 is turned off, energization for the compressor 13 and motor 7M is stopped through the relay 27, so that the inside of the refrigerator is brought under temperature control between 12 and 8 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control system used in, for example, commercial / home refrigerators, prefabricated refrigerators, low-temperature showcases, storage cabinets, frozen dessert production equipment, vending machines, air conditioners and the like. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, for example, in a commercial refrigerator, a low-temperature showcase, or a prefabricated refrigerator,
A compressor, a condenser, a cooler, etc. constituting the cooling device are built in, or the compressor and the condenser are separately installed as a refrigerator, and the refrigerant discharged from the compressor is condensed by the condenser, and the pressure is reduced by the decompression device. After the pressure is reduced, 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.

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. And
In recent years, the operation of these compressors, cooling fans, condenser fans, and the like has been controlled by a control device composed of an electronic circuit.

[0004] A temperature sensor for detecting the internal temperature of the refrigerator is connected to the control device. The temperature of the refrigerator is compared with a temperature set by a switch or a variable resistor and the temperature detected by the temperature sensor. Controls compressors, etc. That is, the set values are the upper limit temperature and the lower limit temperature in the normal refrigerator, and the control device starts the compressor when the refrigerator temperature detected by the temperature sensor reaches the upper limit temperature, and when the temperature falls to the lower limit temperature, That is, the control for stopping the compressor is executed.

[0005]

By the way, as a method of setting the temperature, conventionally, a resistor bridge circuit and a negative feedback resistor are usually connected to an OP amplifier, and a variable resistor of the resistor bridge circuit is adjusted to adjust the temperature of the compressor. The upper limit temperature to be started and the lower limit temperature to be stopped were set, but these upper limit temperature and lower limit temperature depend on the model and specification of the refrigerator or low temperature showcase to be controlled by the control device. Comes very different. for that reason,
The control device has to be designed and manufactured with resistance components having different capacities for each model, and there has been a problem in that the cost of parts has increased in the case of small-scale production of other models.

Conventionally, a control device is constructed by complexly combining circuit components such as a variable resistor and a switch around a microcomputer, so that the size of a board of the control device is increased, and there is a problem in installation space. Was.

The present invention has been made to solve the above-mentioned conventional technical problem, and provides a temperature control device which can solve the cost and dimensional problems by commonization and simplification of the configuration. It is.

[0008]

According to a first aspect of the present invention, there is provided a temperature control device including a temperature control element and a temperature sensor connected to the temperature control element via a signal line. Detecting means, storing means having its own ID code, transmitting and receiving means for transmitting and receiving data to and from the temperature control element via a signal line, and reading and writing data detected by the temperature detecting element to the storing means, and transmitting and receiving And a sensor-side control means for transmitting data in the storage means to the temperature control element, and the temperature control element sets the temperature shift value and the storage means in which the data of the upper limit temperature and / or the lower limit temperature is written. Setting means, a comparing means for controlling the switching element, and a transmitting / receiving means for transmitting and receiving data to and from the temperature sensor via a signal line. By shifting the upper limit temperature and / or the lower limit temperature in the storage means by the determined temperature shift value, and comparing the shifted value with data from the temperature sensor to generate a control output of the switching element. And

According to the first aspect of the present invention, by changing the upper limit temperature and the lower limit temperature written in the storage means of the temperature control element, the temperature control element can be used for devices of various models and specifications. Further, the upper limit temperature and the lower limit temperature are shifted by the setting unit, and the switching element is controlled by comparing the shifted value with the data sent from the temperature sensor. Adjustment is also possible, and it is possible to achieve commonality of parts. Further, since the configuration can be simplified, the cost can be significantly reduced and the size of the control device can be reduced.

[0010] Further, since the temperature sensor is connected to the temperature control element by a signal line, the degree of freedom in installing each element is increased. Particularly in this case, the sensor-side control means of the temperature sensor includes:
Writing the data detected by the temperature detecting means to the storage means,
Since data is transmitted to the temperature control element via the signal line by the transmission / reception means, the temperature control element can take in the data without any trouble. Then, since the temperature sensor has its own ID code in the storage means, by connecting the temperature sensor to the signal line, the temperature control element can identify the temperature sensor, and the wiring of the temperature sensor is completed. .
Thus, it is possible to wire the temperature sensor by a so-called plug-in, and it is possible to significantly simplify the wiring.

A temperature control device according to a second aspect of the present invention includes a temperature control element, and a temperature sensor and a temperature setting element connected to the temperature control element via a signal line. Storage means holding its own ID code, transmission / reception means for transmitting / receiving data to / from the temperature control element via a signal line, and data which is detected by the temperature detection element is written into the storage means and stored by the transmission / reception means A temperature control element for transmitting data in the means to the temperature control element, the temperature setting element includes a volume for setting a temperature shift value, and an A / D converter for converting a voltage of the volume into digital data. Means and their own
Storage means having a D code, transmission / reception means for transmitting / receiving data to / from the temperature control element via a signal line, and digital data converted by the A / D conversion means written in the storage means, and the storage means provided by the transmission / reception means Setting element side control means for transmitting data in the temperature control element, the temperature control element, storage means in which data of the upper limit temperature and / or lower limit temperature is written, comparison means for controlling the switching element, A transmission / reception unit for transmitting / receiving data to / from the temperature sensor and the temperature setting element via a signal line;
Shifting the upper limit temperature and / or the lower limit temperature in the storage means based on the data from the temperature setting element, and comparing the shifted value with the data from the temperature sensor to generate a control output of the switching element. Features.

According to the second aspect of the invention, similarly, by changing the upper limit temperature and the lower limit temperature to be written in the storage means of the temperature control element, it can be used for devices of various models and specifications. Further, the upper limit temperature and the lower limit temperature are shifted based on the data from the temperature setting element, and the switching element is controlled by comparing the shifted value with the data sent from the temperature sensor. The control temperature can be appropriately adjusted accordingly, and it is possible to achieve commonality of components. Further, since the configuration can be simplified, the cost can be significantly reduced and the size of the control device can be reduced.

[0013] Similarly, since the temperature sensor and the temperature setting element are connected to the temperature control element by a signal line, the degree of freedom in installing each element is increased. In particular, in this case, the sensor-side control unit of the temperature sensor writes the data detected by the temperature detection unit to the storage unit, and transmits the data to the temperature control element via the signal line by the transmission / reception unit. Data can be captured. Then, since the temperature sensor has its own ID code in the storage means, by connecting the temperature sensor to the signal line, the temperature control element can identify the temperature sensor, and the wiring of the temperature sensor is completed. .

Further, the setting element side control means of the temperature setting element converts the temperature shift value set by the volume into digital data by the A / D conversion means and writes the digital data into the storage means, and the transmission / reception means stores the data in the storage means. Since the data is transmitted to the temperature control element, the temperature control element can take in the data without any trouble. And since the temperature setting element has its own ID code in the storage means, by connecting the temperature setting element to the signal line, the temperature control element can identify the temperature setting element, Wiring is completed.

Thus, the temperature sensor and the temperature setting element can be wired by so-called plug-in, and the wiring can be significantly simplified.

[0016]

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 1 as an embodiment of a device to which the present invention is applied, and FIG. 2 is a block diagram of an electric circuit of a temperature control device 9 of the present invention. In FIG. 1, a refrigerator 1 has a main body 5 formed of a heat insulating box 2 opening to the front, and a storage room (inside the refrigerator) 3 is formed inside the heat insulating box 2. The front opening of the storage room 3 is closed by a door 4 so that it can be opened and closed.

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

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 constituting 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 gas refrigerant discharged from the compressor 13 radiates heat in the condenser 14 to be condensed, and is decompressed by a decompression device (not shown). Supplied. In the cooler 6, the refrigerant evaporates and exerts a cooling function. Thereafter, the low-temperature gas refrigerant returns to the compressor 13 again.

When the cooling fan 7 is operated, the cool air cooled by the cooler 6 is circulated into the storage room 3, thereby cooling the inside of the storage room 3. 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.

Next, in FIG. 2, the temperature control device 9 comprises a thermostat chip 21 as a temperature control element formed in a chip shape, and a temperature sensor 42 connected to the thermostat chip 21 via a signal line 22. ing. The thermostat chip 21 is connected to a volume (constituting a setting unit) 47, a switching element 26 including a transistor and a thyristor, and a relay 27 including a photocoupler.

As shown in detail in FIG. 3, the thermostat chip 21 includes an interface logic 31 constituted by a logic circuit, a thermostat register (storage means) 32, a comparator (comparison means) 33, and a temperature data register 34. , Shift register 36 and A / D
A converter 46 (constituting a setting unit) and an operation mode (configuration) register (storage unit) 41
And these are configured by one chip.

The interface logic 31 has a serial communication function for transferring data via the temperature sensor 42 and the signal line 22, a register, a protocol, and the like. Therefore, by being connected to the temperature sensor 42 via the signal line 22, it has a function of receiving data from the temperature sensor 42 and transmitting data to the temperature sensor 42. The upper limit temperature TH and the lower limit temperature TL are written in the thermostat register 32 in one shot at the time of production.

The temperature data register 34 stores the internal temperature T received by the interface logic 31 as described later.
The data of P is written. A / D converter 4
6, a volume 47 is externally attached. Then, the resistance value of the volume 47 is converted into a temperature shift value TC by the A / D converter 46 (64-position digital register). Further, the A / D converter 46 changes the temperature shift value TC by 64 bits,
The values of ° C, 32 ° C, 16 ° C, 8 ° C, and 4 ° C can be set, and are set to any of them by the operation mode register 41. The shift register 36 is set to use several digits of the temperature shift value.

The data of the internal temperature TP in the temperature data register 34 is sent to the comparator 33. Also,
The upper limit temperature TH and the lower limit temperature TL in the thermostat register 32 are also sent to the comparator 33, and the temperature shift value TC is also sent to the comparator 33 via the shift register 36.

The output of the comparator 33 is connected to the gate of the switching element 26. The switching element 26 controls a relay 27,
Controls the power supply to the motor 7M of the compressor 13 and the cooling fan 7. The other electric components are continuously energized.

The operation mode of each function is determined by the operation mode register 41. The operation mode set by the operation mode register 41 is set at the time of production. In particular, the change width of the temperature shift value TC in the A / D converter 46 is also selected by the operation mode register 41 to any one of the aforementioned 64 ° C., 32 ° C., 16 ° C., 8 ° C., and 4 ° C.

On the other hand, the temperature sensor 42 is provided in the storage room 3, and as shown in detail in FIG. 4, a CPU 143 as a sensor side control means and a memory 144 as a storage means.
And an I / O interface 146 as transmission / reception means
, An A / D converter 147, a sensor unit 148 as a temperature detecting means connected to the A / D converter 147, a capacitor 149, a diode 151, and the like.

In this case, the capacitor 149 is connected to the output side of the diode 151, and each element is connected to a connection point between the diode 151 and the capacitor 149.
A potential (high potential) of, for example, +5 V is applied to the signal line 22, and data is composed of pulses that fall from the high potential to a low potential of 0 V, for example.

When the temperature sensor 42 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 high potential, and the capacitor 149 is supplied. Is also charged. And while it is at a low potential, it is discharged from the capacitor 149,
The power supply of each element is provided.

The temperature sensor 42 has Vcc (DC + 5)
V) A power supply terminal 145 is also provided, which is connected to a connection point between the diode 151 and the capacitor 149. When the Vcc power supply terminal 145 is connected to a power supply line, each element is supplied with power from the power supply line. It is configured so that it can also operate. That is, in this case, each element operates without filling the capacitor 149, so that the convenience is improved when it is desired to quickly operate the temperature sensor 42 at the time of inspection or the like.

Further, the CPU 143 takes in the temperature data in the storage room 3 detected by the sensor section 148 via the A / D converter 147, and writes it into the memory 144 once. Then, the signal line 22 is transmitted by the I / O interface 146.
When the data is polled from the thermostat chip 21 via the I / O, the temperature data written in the memory 144 is
The signal is transmitted to the thermostat chip 21 via the signal line 22 by the interface 146.

Here, the memory 144 includes the temperature sensor 42
ID code of itself, identification data indicating that the sensor is used, set value data such as alarm temperature, and thermostat chip 21
A communication protocol and the like for performing data communication with the device are stored. If a failure has occurred in the temperature sensor 42, the failure data is also written to the memory 144 and transmitted to the thermostat chip 21. Further, the temperature sensor 42 has a self-holding function for holding the current state when the communication with the thermostat chip 21 is interrupted.

The operation of the above configuration will be described. Now, the interface logic 31 causes the thermostat register 32 to store, for example, 4 ° C. as the upper limit temperature TH (00001100B as the content of the register) and 0 ° C. as the lower limit temperature TL (0000000 as the content of the register).
000B) is set and written as described above.

The operation mode register 41 sets the change width of the temperature shift value TC in the A / D converter 46 to 16 ° C. based on an external instruction. In the operation mode register 41, a thermostat operation is set. As a result, even after the power is turned on, the thermostat chip 21 starts the thermostat operation independently.

Then, by changing the resistance value of the volume 47, the temperature shift value TC is changed to the median value 8 of the change width 16 ° C.
.Degree. C. (the content of the register is 00001000 B).
(4 ° C .: 00000100B) and the temperature shift value TC. Thus, the shifted upper limit temperature is 0000.
0100B + 00001000B = 0000100
B, that is, 12 ° C.

The comparator 33 determines the lower limit temperature T.
The temperature shift value TC is added to L (0 ° C .: 0000000000B). Thereby, the shifted lower limit temperature is 000
00000B + 00001000B = 00001000
B, that is, 8 ° C.

On the other hand, the interface logic 31 of the thermostat chip 21 scans the temperature sensor 42 connected to the signal line 22,
Receives and stores the code. Thereby, the interface logic 31 identifies the temperature sensor 42.

Next, the interface logic 31
Polls the temperature sensor 42 via the signal line 22 using the ID code. CP of temperature sensor 42
In response to the polling, the U 143 transmits the temperature data (the temperature of the storage room 3, that is, the internal temperature TP) written in the memory 144 to the thermostat chip 21 through the I / O interface 146. The interface logic 31 receives the temperature data and writes it to the temperature data register 34.

The comparator 33 compares the shifted upper limit temperature: 12 ° C., the lower limit temperature 8 ° C., and the internal temperature TP sent from the temperature sensor 42 to the temperature data register 34 as described above. When the temperature reaches 12 ° C. (upper limit temperature), the switching element 26 is turned ON, and when the internal temperature TP drops to 8 ° C. (lower limit temperature), the switching element 26 is turned OFF.

When the switching element 26 is turned on, the compressor 13 and the motor 7M are energized by the relay 27, and they are activated.
Is turned off, the relay 13 causes the compressor 13
And the power supply to the motor 7M is stopped. Thereby, the temperature in the storage room 3 is controlled between 12 ° C. and 8 ° C.

Next, FIGS. 5 to 7 show another embodiment of the present invention. In this figure, components having the same reference numerals as those in FIGS. 1 to 4 have the same or similar functions. In this case, the thermostat chip 21 is not provided with the A / D converter 46, the volume 47 and the shift register 36 as shown in FIG.
Is connected to an A / D conversion element 44 as a temperature setting element.

FIG. 7 shows the structure of the A / D conversion element 44. The A / D conversion element 44 is provided on the operation panel 11, and includes a CPU 181 as a setting element side control unit, a memory 182 as a storage unit, and an I / O unit as a transmission / reception unit.
An O interface 183, an A / D converter 184 as A / D conversion means, a capacitor 186, a diode 187, and the like.

In this case, the capacitor 186 is connected to the output side of the diode 187, and each element is connected to a connection point between the diode 187 and the capacitor 186.
Then, when the A / D conversion element 44 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. , The capacitor 186 is also charged. And
While the potential is low, the capacitor 186 is discharged to supply power to each element.

The A / D conversion element 44 also has Vcc (DC
+ 5V) A power supply terminal 189 is provided and a diode 187 is provided.
Is connected to the connection point of the
The D conversion element 44 is configured such that, when this Vcc power supply terminal 189 is connected to a power supply line, each element can operate even when power is supplied from the power supply line. That is, in this case, each element operates without filling the capacitor 186, so that the convenience is improved when the A / D conversion element 44 is required to operate quickly at the time of inspection or the like.

The A / D of the A / D conversion element 44
The same volume 47 as described above is connected to the converter 184. Then, the terminal voltage of the volume 47 is converted into digital data (temperature shift value TC) by the A / D converter 184 and is taken in, and is temporarily written in the memory 182. Then, the signal line 22 is output by the I / O interface 183.
When the polling is performed by the thermostat chip 21 via the
The signal is transmitted to the thermostat chip 21 via the signal line 22 by the / O interface 183.

The memory 182 stores the ID code of the A / D conversion element 44 itself, identification data indicating that the A / D conversion element is used, a communication protocol for performing data communication with the thermostat chip 21, and the like. It is remembered. If a failure has occurred in the A / D conversion element 44, the failure data is also written to the memory 182 and transmitted to the thermostat chip 21. Further, the A / D conversion element 44 has a self-holding function for holding the current state when communication with the thermostat chip 21 is interrupted.

The A / D conversion element 44 has a register bit shift to change the temperature shift value TC by 6 bits.
Values of 4 ° C, 32 ° C, 16 ° C, 8 ° C, and 4 ° C can be set.
The thermostat chip 21 receives A /
The data of the temperature shift value TC is received by the interface logic 31 from the D conversion element 44, and the adjustment value register 3
Write to 6A.

The temperature shift value TC in the adjustment value register 36A is sent to the comparator 33 in the same manner as described above, and is similarly added to the upper limit temperature TH (4 ° C .: 00000100B). As a result, the shifted upper limit temperature becomes 00
000100B + 00001000B = 0000110
OB, that is, 12 ° C. Similarly, the lower limit temperature TL (0 ° C .: 00000000)
The temperature shift value TC is added to B), whereby the shifted lower limit temperature is 000000000B + 000010.
00B = 00001000B, that is, 8 ° C. Thereafter, the same operation is performed.

In the embodiments, the present invention has been described using a commercial refrigerator. However, the present invention is not limited to this, and various electric devices such as a home refrigerator, a low-temperature showcase, a prefabricated refrigerator, a vending machine, and an air conditioner, or The present invention is also effective for home automation in automobiles and houses.

[0051]

As described in detail above, according to the first aspect of the present invention, by changing the upper limit temperature and the lower limit temperature written in the storage means of the temperature control element, it can be used for equipment of various models and specifications. become able to. Further, the upper limit temperature and the lower limit temperature are shifted by the setting unit, and the switching element is controlled by comparing the shifted value with the data sent from the temperature sensor. Adjustment is also possible, and it is possible to achieve commonality of parts. Further, since the configuration can be simplified, the cost can be significantly reduced and the size of the control device can be reduced.

Further, since the temperature sensor is connected to the temperature control element by a signal line, the degree of freedom in installing each element increases. Particularly in this case, the sensor-side control means of the temperature sensor includes:
Writing the data detected by the temperature detecting means to the storage means,
Since data is transmitted to the temperature control element via the signal line by the transmission / reception means, the temperature control element can take in the data without any trouble. Then, since the temperature sensor has its own ID code in the storage means, by connecting the temperature sensor to the signal line, the temperature control element can identify the temperature sensor, and the wiring of the temperature sensor is completed. .
Thus, it is possible to wire the temperature sensor by a so-called plug-in, and it is possible to significantly simplify the wiring.

According to the second aspect of the invention, similarly, by changing the upper limit temperature and the lower limit temperature to be written in the storage means of the temperature control element, it can be used for devices of various models and specifications. Further, the upper limit temperature and the lower limit temperature are shifted based on the data from the temperature setting element, and the switching element is controlled by comparing the shifted value with the data sent from the temperature sensor. The control temperature can be appropriately adjusted accordingly, and it is possible to achieve commonality of components. Further, since the configuration can be simplified, the cost can be significantly reduced and the size of the control device can be reduced.

Similarly, since the temperature sensor and the temperature setting element are connected to the temperature control element by a signal line, the degree of freedom in installing each element is increased. In particular, in this case, the sensor-side control unit of the temperature sensor writes the data detected by the temperature detection unit to the storage unit, and transmits the data to the temperature control element via the signal line by the transmission / reception unit. Data can be captured. Then, since the temperature sensor has its own ID code in the storage means, by connecting the temperature sensor to the signal line, the temperature control element can identify the temperature sensor, and the wiring of the temperature sensor is completed. .

Further, the setting element side control means of the temperature setting element converts the temperature shift value set by the volume into digital data by the A / D conversion means, writes the digital data in the storage means, and transmits and receives the data in the storage means by the transmission / reception means. Since the data is transmitted to the temperature control element, the temperature control element can take in the data without any trouble. And since the temperature setting element has its own ID code in the storage means, by connecting the temperature setting element to the signal line, the temperature control element can identify the temperature setting element, Wiring is completed.

Thus, the temperature sensor and the temperature setting element can be wired by so-called plug-in, and the wiring can be significantly simplified.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of an electric circuit of the temperature control device of the present invention.

FIG. 3 is a block diagram of an electric circuit of a thermostat chip of the temperature control device of FIG. 2;

FIG. 4 is a block diagram of an electric circuit of the temperature sensor of FIG. 2;

FIG. 5 is a block diagram of an electric circuit of another temperature control device of the present invention.

6 is a block diagram of an electric circuit of a thermostat chip of the temperature control device of FIG.

7 is a block diagram of an electric circuit of an A / D conversion element of the temperature control device of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 6 Cooler 7 Cooling fan 7M motor 8 Dew prevention heater 9 Temperature control device 13 Compressor 14 Condenser 16 Condenser fan 21, 43 Thermostat chip 22 Signal line 26 Switching element 27 Relay 31 Interface logic 32 Thermostat register 33 Comparator 41 Operation Mode register 42 Temperature sensor 46 A / D converter 47 Volume 143, 181 CPU 148 Sensor unit 184 A / D converter

 ──────────────────────────────────────────────────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. 5H323 AA12 AA18 AA19 BB11 DB06 EE01 EE08 EE10 FF01 HH02 HH05 KK05 LL07 LL10 MM02 NN03 NN07

Claims (2)

[Claims] 1. A temperature control element, comprising: a temperature sensor connected to the temperature control element via a signal line; the temperature sensor includes a temperature detection unit; a storage unit having its own ID code; Transmitting and receiving means for transmitting and receiving data to and from the temperature control element via the signal line; fetching data detected by the temperature detecting element and writing the data in the storage means; A sensor-side control unit for transmitting to a control element, wherein the temperature control element is a storage unit in which data of an upper limit temperature and / or a lower limit temperature is written, a setting unit for setting a temperature shift value, and a switching element And a transmitting / receiving means for transmitting and receiving data to and from the temperature sensor via the signal line. The comparing means is provided by the setting means. Shifting the upper limit temperature and / or lower limit temperature in the storage unit by the shifted temperature shift value, and comparing the shifted value with data from the temperature sensor to generate a control output of the switching element. A temperature control device characterized by the above-mentioned. 2. A temperature control device, comprising a temperature sensor and a temperature setting device connected to the temperature control device via a signal line, wherein the temperature sensor has a temperature detecting means and its own ID code. Storage means, transmitting and receiving means for transmitting and receiving data to and from the temperature control element via the signal line, fetching data detected by the temperature detecting element and writing the data to the storage means, Sensor-side control means for transmitting data to the temperature control element; and the temperature setting element includes a volume for setting a temperature shift value, and A / D conversion means for converting a voltage of the volume into digital data. A storage unit having its own ID code; a transmission / reception unit for transmitting and receiving data to and from the temperature control element via the signal line; Setting element-side control means for writing digital data converted in the stage to the storage means, and transmitting data in the storage means to the temperature control element by the transmission / reception means, wherein the temperature control element has an upper limit. A storage unit in which data of the temperature and / or the lower limit temperature is written; a comparison unit that controls a switching element; and a transmission and reception unit that exchanges data with the temperature sensor and the temperature setting element via the signal line. The comparing means shifts an upper limit temperature and / or a lower limit temperature in the storage means based on data from the temperature setting element, compares the shifted value with data from the temperature sensor, and switches the switching element. A temperature control device for generating a control output of the temperature control device.