JP6109690B2 - Temperature control device - Google Patents

Description

  The present invention relates to a temperature adjustment device that heats or cools the inside of a container so as to reach a set temperature with a temperature adjuster.

  Patent Documents 1 and 2 below disclose a cooking device that is a type of temperature adjustment device. These heating cookers include a heater that heats the inside of the cooking chamber containing the ingredients, a temperature sensor that detects the temperature in the cooking chamber, and a temperature in the cooking chamber that is based on the temperature detected by the temperature sensor. And a control device for controlling the operation of the heater.

JP-A-2-199787 Japanese Patent Laid-Open No. 2002-081642

In each of the above heating cookers, the temperature in the cooking chamber is controlled to be a set temperature by controlling the operation of the heater by the control device. That is, the control device controls to stop the operation of the heater when the temperature detected by the temperature sensor reaches the upper limit temperature higher than the set temperature, and controls the heater to operate when the lower limit temperature is lower than the set temperature. In such a heating cooker, when the upper limit temperature is reached, the heater operation is stopped, and when the lower limit temperature is reached, the heater operation is started. After rising, the temperature drops, and even after the heater starts operating, the temperature in the cooking chamber decreases for a while and then the temperature rises, and the temperature control accuracy in the cooking chamber is not high. there were. In particular, in a heating cooker using a gas combustion heater as in Patent Document 2, the temperature range that rises or falls after the heater is activated and stopped is large, and the temperature adjustment accuracy in the cooking chamber is increased. and this has been difficult. In order to cope with this, by making the upper limit temperature and the lower limit temperature of the set temperature close to the set temperature, it is possible to prevent the temperature in the cooking chamber from fluctuating greatly from the set temperature. However, if the upper limit temperature and the lower limit temperature of the set temperature are too close to the set temperature, the heater will repeatedly operate and stop in a short time, and there is a problem that the heater reaches the product life due to the number of operations earlier. . In addition, in a heating cooker using a gas combustion type heater as in Patent Document 2, in order to maintain a long product life due to the number of heater operations, the heater operation start interval must be set long, It was difficult to make the upper limit temperature and lower limit temperature of the set temperature close to the set temperature, and to prevent the temperature in the cooking chamber from greatly fluctuating up and down from the set temperature. The present invention controls the operation of the temperature regulator so that the temperature in the container does not greatly deviate from the set temperature while observing the operation start interval of the temperature regulator that heats or cools the temperature in the container. Objective.

In order to solve the above problems, the present invention provides a temperature regulator for heating the interior of the storage, a temperature sensor for detecting the temperature in the storage, and a temperature in the storage based on the temperature detected by the temperature sensor. A control device that controls the operation of the temperature regulator so that the set temperature becomes a predetermined temperature, and the control device controls the temperature regulator controlled so that the temperature regulator is not operated unless a predetermined operation start interval has elapsed. when devices that heat the inside of accommodating box by operating the temperature controller, and the maximum temperature, the temperature regulator deactivation assuming that the operation to stop the temperature controller from the detection temperature detected by the temperature sensor The temperature at the start of the operation start interval at the end of the operation start interval when it is assumed to have been predicted over time, and the temperature detected by the temperature sensor is below the maximum temperature and above the temperature at the end of the operation start interval. The temperature adjustment device is characterized in that the operation of the temperature regulator is controlled to stop when the value obtained by subtracting the set temperature from the temperature becomes equal to or greater than the value obtained by subtracting the temperature when the operation start interval expires from the set temperature. is there.

A temperature adjusting device configured as described above, assuming that the controller has time to actuate stop the temperature controller from the detection temperature detected by the temperature sensor is heated to the receiving box by operating the temperature controller The temperature at the end of the operation start interval when the temperature regulator is assumed to have stopped operating is predicted over time, and the temperature detected by the temperature sensor is operated below the maximum temperature. The temperature regulator is controlled to stop operating when the temperature is equal to or higher than the temperature at the end of the start interval and the value obtained by subtracting the set temperature from the maximum temperature is equal to or greater than the value obtained by subtracting the temperature at the end of the operation start interval from the set temperature. Adhering to the operation start interval of the adjuster, the temperature in the container can be hunted to the minimum with the same temperature range up and down across the set cooking temperature. It was possible to increase the accuracy of the control of.

In order to solve the above problems, the present invention, as another embodiment, accommodates a temperature regulator that cools the inside of the storage, a temperature sensor that detects the temperature in the storage, and a temperature sensor that detects the temperature. And a control device that controls the operation of the temperature regulator so that the temperature inside the chamber becomes a predetermined set temperature, and the control device controls the temperature regulator so that it does not operate unless a predetermined operation start interval has elapsed. In the temperature adjustment device, when the control device is operating the temperature regulator to cool the inside of the container, the minimum temperature when it is assumed that the temperature regulator is deactivated from the detected temperature detected by the temperature sensor, Predicts the temperature at the end of the operation start interval when the operation start interval expires when it is assumed that the temperature regulator has stopped operating, and when the temperature detected by the temperature sensor exceeds the minimum temperature and the operation start interval expires Or less degrees, a temperature adjustment, characterized in that the control to stop the operation of the temperature regulator when the value obtained by subtracting the minimum temperature from the set temperature is equal to or greater than a value obtained by subtracting the set temperature from the operation start interval expires when the temperature A device is provided.

In the temperature adjustment device configured as described above, it is assumed that the control device has stopped operating the temperature adjuster from the detected temperature detected by the temperature sensor while operating the temperature adjuster to cool the inside of the container. The minimum temperature at the time of operation and the temperature at the end of the operation start interval at the end of the operation start interval when it is assumed that the temperature regulator has been stopped are predicted over time, and the temperature detected by the temperature sensor is activated at the minimum temperature or higher. The temperature regulator is controlled to stop operating when the temperature is less than the temperature at the end of the start interval and the value obtained by subtracting the minimum temperature from the set temperature is equal to or greater than the value obtained by subtracting the set temperature from the temperature at the end of the operation start interval. Adhering to the operation start interval of the adjuster, the temperature in the container can be hunted to the minimum with the same temperature range up and down across the set cooking temperature. It was possible to increase the accuracy of the control of.

It is the schematic of the heating cooker which is one Embodiment of the temperature control apparatus made to heat the inside of the storage container of this invention. It is a block diagram which shows the control apparatus of a heating cooker. It is a graph which shows the temperature in a cooking chamber. It is the schematic of the refrigerator which is one Embodiment of the temperature control apparatus made to cool the inside of the storage of this invention. It is a block diagram which shows the control apparatus of a refrigerator. It is a graph which shows the temperature in a storage.

  Hereinafter, a heating cooker which is an embodiment of a temperature adjusting device configured to heat the inside of a storage case of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the heating cooker 10 includes a cooking cabinet (container) 12 that accommodates ingredients in a portion of the housing 11 excluding the machine room 13 on the left side. A heater (temperature regulator) 21 is provided in the cooking chamber 12, and the heater 21 in this embodiment heats the interior of the cooking chamber 12 with the combustion gas obtained by burning the fuel gas with the gas burner 21a.

  The heater 21 includes a heating tube 21 b in the cooking chamber 12, and the heating tube 21 b heats the inside of the cooking chamber 12 by exchanging heat of the passing combustion gas with the air in the cooking chamber 12. A gas burner 21a is provided at the fuel gas introduction end of the heating tube 21b. The gas burner 21a ignites the fuel gas by an ignition plug (not shown) and burns it. The ignition by the spark plug is performed when the operation of the heater 21 is started. The heating pipe 21b is connected with a mixing pipe 21c supplied with a mixture of fuel gas and air, and the mixing pipe 21c is connected with an air supply pipe 21d and a fuel gas supply pipe 21f. . A blower fan 21e is connected to the air supply pipe 21d, and the blower fan 21e sends combustion air to the mixing pipe 21c through the air supply pipe 21d. A gas supply source (not shown) such as city gas or propane gas is connected to the gas supply pipe 21f. A gas valve 21g is interposed in the gas supply pipe 21f, and the gas for fuel passing through the gas supply pipe 21f from the gas supply source is supplied and cut off by opening and closing the gas valve 21g. A pressure equalizing valve 21h is interposed in the gas supply pipe 21f, and the pressure equalizing valve 21h is connected to the air supply pipe 21d by a pressure detection pipe 21i. The pressure equalizing valve 21h adjusts the pressure of the fuel gas passing through the gas supply pipe 21f in accordance with the supply pressure of the combustion air supplied from the air supply pipe 21d, and controls the flow rate of the fuel gas supplied from the gas supply pipe 21f. To be adjusted.

  An internal fan 22 that circulates air is provided in the cooking chamber 12, and the air in the cooking chamber 12 is blown to the heating tube 21 b of the heater 21 by the operation of the internal fan 22 and circulates as hot air. . A temperature sensor 23 is provided in the cooking cabinet 12, and the temperature sensor 23 detects the temperature in the cooking cabinet 12. A steam generator 14 is provided in the machine room 13 in the housing 11, and the steam generator 14 supplies steam into the cooking chamber 12.

  The heating cooker 10 includes a control device 30, and as shown in FIG. 2, the control device 30 is connected to the heater 21, the internal fan 22, the temperature sensor 23, and the steam generation device 14. Yes. The control device 30 includes a microcomputer (not shown), and the microcomputer includes a CPU, a RAM, a ROM, and a timer (all not shown) connected via a bus.

  The control device 30 includes a drive circuit 31 that variably drives input power to the fan motor of the blower fan 21e. The drive circuit 31 can adjust the output (rotation speed) of the blower fan 21e, that is, the flow rate of air. The controller 30 adjusts the output of the blower fan 21e by the drive circuit 31, whereby the flow rate of the combustion air supplied to the mixing pipe 21c is adjusted. Further, the pressure of the fuel gas in the gas supply pipe 21f is adjusted by the pressure equalizing valve 21h according to the flow rate of the combustion air supplied to the mixing pipe 21c, and the flow rate of the gas supplied to the mixing pipe 21c is adjusted. Yes. By adjusting the output of the blower fan 21e by the drive circuit 31 and adjusting the flow rates of the combustion air and the combustion gas, the output (thermal power) of the heater 21 can be adjusted between 40 and 100%. Yes. Note that the drive circuit 31 may adjust the output (rotation speed) of the blower fan by driving the drive frequency of the blower fan 21e variably.

The control device 30 includes a cooking program for cooking food in the ROM. The cooking program is a cooking program in a hot air mode in which the heater 21 and the internal fan 22 are operated, the steam generator 14 and the warehouse. It comprises a cooking program in a steam mode in which the internal fan 22 is operated, and a cooking program in three modes including a cooking program in a combined mode in which the heater 21, the steam generator 14, and the internal fan 22 are operated. ing. In addition, in each of these cooking programs, the cooking temperature, cooking time, and steam concentration are set according to the cooking method of the ingredients in the cooking cabinet 12. In addition, it is good also as selecting each said mode suitable for the cooking method of a foodstuff using the operation panel which is not shown in figure, and making it possible to set finely the cooking temperature, cooking time, and steam concentration in each mode.

  The heater 21 heats the inside of the cooking chamber 12 with the combustion gas obtained by burning the fuel gas, and it is necessary to ensure the product life due to the number of times the heater 21 is operated. Therefore, the control device 30 sets the operation start interval of the heater 21 to 120 seconds so that the heater 21 does not repeat the operation and operation stop (start / stop) in a short time, and the operation start interval from the operation start of the heater 21 is 120 seconds. Control is performed so that the heater 21 once stopped is not started again unless it has elapsed.

  The control device 30 controls the operation of the heater 21 so that the temperature in the cooking cabinet 12 becomes a predetermined set cooking temperature (set temperature) when each cooking program is executed. In particular, when control is performed so that the set cooking temperature is maintained after the temperature in the cooking chamber 12 once reaches the set cooking temperature, the control device 30 adjusts the output of the blower fan 21e by the drive circuit 31 to adjust the heater. The following control is executed so that the temperature in the cooking chamber 12 is not greatly hunted up and down across the set cooking temperature while controlling the output (thermal power) 21 to the minimum output (40% output), for example. doing.

  The control device 30 operates the heater 21 so as to reach the set cooking temperature TT (° C.) to heat the inside of the cooking cabinet 12, and controls the heater 21 from the detected temperature TR (° C.) detected by the temperature sensor 23. Maximum temperature TF (R) (° C.) when it is assumed that the operation has been stopped (fire extinguishing), and temperature TF (F) at the time when the operation start interval has expired when the operation start interval has expired when it is assumed that the heater 21 has been stopped. ° C) over time. Specifically, when the heater 21 is operated to heat the inside of the cooking chamber 12, the temperature in the cooking chamber 12 continues to rise for about 30 seconds after the heater 21 is deactivated, and after about 30 seconds. The maximum temperature is reached with a delay. At this time, the temperature that rises after the heater 21 is deactivated is substantially the same as the rate of increase of the temperature that is raised while the heater 21 is operating, and the rate that the temperature sensor 23 detects and the temperature that is increased when the heater 21 is activated. As a predetermined time, the temperature after 20 seconds is predicted as the maximum temperature TF (R) (° C.) when it is assumed that the heater 21 is stopped.

  The control device 30 predicts the maximum temperature TF (R) when it is assumed that the heater 21 has been deactivated as described above, and the temperature at the expiration of the operation stop interval when it is assumed that the heater 21 has been deactivated (see FIG. Predict the temperature TF (F) when the operation stop interval expires. The temperature in the cooking chamber 12 gradually decreases after reaching the maximum temperature about 30 seconds after the heater 21 stops operating. The control device 30 predicts the temperature at the expiration of the operation stop interval of the heater 21 from the temperature drop rate table showing the relationship between the temperature in the cooking chamber 12 and the temperature drop rate, a part of which is shown in Table 1.

The controller 30 determines whether the temperature TR detected by the temperature sensor 23 is equal to or lower than the above-described maximum temperature TF (R) and equal to or higher than the temperature TF (F) when the operation start interval expires (TF (F) ≦ TR ≦ TF (R )) Is determined (first determination condition), and the value obtained by subtracting the set cooking temperature TT from the maximum temperature TF (R) is equal to or greater than the value obtained by subtracting the temperature TF (F) when the operation start interval expires from the set cooking temperature TT. Is determined (second determination condition), and when the first and second determination conditions are satisfied, the operation of the heater 21 is stopped.

  The first determination condition is for excluding the state where the temperature in the cooking chamber 12 is not increased because the temperature in the cooking chamber 12 rises after about 30 seconds from the start of the operation of the heater 21. . The second determination condition is to allow the temperature in the cooking chamber 12 to be hunted to the minimum with the same temperature range up and down across the set cooking temperature while observing the operation start interval of the heater 21.

In the heating cooker 10 configured as described above, the temperature in the cooking chamber 12 rises to the set cooking temperature by operating the heater 21. At this time, the control device 30 executes the first and second determination conditions based on the temperature detected by the temperature sensor 23 to control the operation of the heater 21 so that the temperature in the cooking cabinet 12 maintains the set cooking temperature. Be controlled.

  In the heating cooker 10 configured as described above, when the heater 21 is operated so that the temperature in the cooking chamber 12 becomes the set cooking temperature TT, the control device 30 detects the temperature sensor 23 to detect. The maximum temperature TF (R) when it is assumed that the heater 21 is deactivated from the temperature, and the temperature TF (F at the time when the operation start interval expires when the operation start interval of the heater 21 expires when it is assumed that the heater 21 is deactivated. ) Is predicted over time. The control device 30 satisfies the condition that the temperature detected by the temperature sensor 23 is equal to or lower than the maximum temperature TF (R) and is equal to or higher than the temperature TF (F) when the operation start interval expires, and subtracts the set cooking temperature TT from the maximum temperature TF (R). Control was performed to stop the operation of the heater 21 when the value satisfies a condition that the value is equal to or greater than the value obtained by subtracting the temperature TF (F) at the end of the operation start interval from the set temperature TT.

  Thereby, after observing the operation start interval of the heater 21, the temperature in the cooking chamber 12 can be hunted to the minimum with the same temperature range up and down across the set cooking temperature TT. The accuracy of temperature control could be increased. In particular, the temperature in the cooking cabinet 12 is hunted to the minimum with the same temperature range across the set cooking temperature TT, so that the temperature is higher or lower than the set cooking temperature TT. And the foodstuff accommodated in the cooking chamber 12 was able to approach the thing cooked maintaining the preset cooking temperature TT, and was able to make the heating condition of the foodstuff in the cooking cabinet 12 favorable. Moreover, since the heater 21 of this embodiment is a gas combustion type, the range in which the output of the heater 21 can be varied is 40 to 100%, and the heater 21 can be varied in the range of low output (for example, 10 to 30%). It is difficult to maintain the temperature in the cooking cabinet 12 without hunting up and down so much near the set cooking temperature. However, since the operation of the heater 21 is controlled as described above, the operation start interval of the heater 21 is observed even in the cooking device 10 using the gas combustion type heater 21 that cannot be variably controlled at a low output. In addition, the temperature in the cooking cabinet 12 can be hunted to the minimum with the same temperature range up and down across the set cooking temperature, and the temperature control accuracy in the cooking cabinet 12 can be increased. It was.

  In the above embodiment, the heater 21 is a gas combustion type heater, but the present invention is not limited to this, and the same effect can be obtained even with an electric heater such as a sheathed heater. it can.

  Moreover, although the heating cooker was illustrated as one Embodiment of the temperature control apparatus which heats a storage with a temperature controller, this invention is not restricted to this, For example, the oil accommodated in the storage is heated with a heater. The boiler which heats the water accommodated in the fryer and the storage may be sufficient, and when it does in this way, the effect similar to having mentioned above can be acquired. In this case, the heater may be an electric type or a gas combustion type. However, particularly in the case of a gas combustion type heater, it is necessary to observe the operation start interval. it can.

  Next, a refrigerator 10A, which is an embodiment of a temperature adjusting device configured to cool the inside of the storage case of the present invention, will be described. As shown in FIG. 4, the refrigerator 10 </ b> A includes a storage 12 </ b> A that stores food. An evaporator 21Aa of a refrigeration apparatus (temperature controller) 21A is provided in the storage 12A. The refrigerating apparatus 21A cools the refrigerant gas pumped from the compressor 21Ab with a condenser 21Ac to form a liquefied refrigerant, which expands when passing through the capillary tube, and passes the expanded liquefied refrigerant through the evaporator 21Aa. The inside of the storage 12A is cooled by exchanging heat with the air in the storage 12A circulated by the fan 22A. A temperature sensor 23A for detecting the temperature in the storage 12A is provided in the storage 12A.

The refrigerator 10A includes a control device 30A. As shown in FIG. 5, the control device 30A is connected to a refrigeration device 21A and a temperature sensor 23A. The control device 30A includes a microcomputer (not shown), and the microcomputer includes a CPU, a RAM, a ROM, and a timer (all not shown) connected via a bus. The control device 30A controls the operation of the refrigeration device 21A based on the temperature detected by the temperature sensor 23A, and controls the temperature in the storage 12A to be a predetermined set temperature. Further, the control device 30A sets the operation start interval of the compressor 21Ab of the refrigeration apparatus 21A to 120 seconds so that the refrigeration apparatus 21A (particularly the compressor 21Ab) does not repeat the operation and operation stop (start / stop) in a short time. Control is performed so that the compressor 21Ab once stopped is not started again unless the operation start interval of 120 seconds has elapsed since the start of the operation of the compressor 21Ab.

  The control device 30A executes the following control so that the temperature in the storage 12A does not hunt up and down greatly across the set temperature. The control device 30A stops the operation of the refrigeration apparatus 21A from the detected temperature detected by the temperature sensor 23A when the refrigeration apparatus 21A is operated so as to be the set temperature TT (° C.) to cool the inside of the storage 12A. The minimum temperature TF (F) (° C.) when the operation start interval expires when the refrigeration apparatus 21A is assumed to have stopped operating, and the temperature TF (R) (° C.) at the end of the operation start interval when the operation start interval expires. Predict. Specifically, when the inside of the storage 12A is cooled by operating the refrigeration apparatus 21A, the temperature in the storage 12A continues to drop for about 30 seconds after the operation of the refrigeration apparatus 21A is stopped, and about 30 The minimum temperature is reached after a delay of a second. At this time, the temperature that decreases after the refrigeration apparatus 21A is stopped is substantially the same as the temperature decrease rate during the operation of the refrigeration apparatus 21A, and the temperature detected by the temperature sensor 23 and the temperature when the refrigeration apparatus 21A is in operation. The temperature after 20 seconds is predicted as the lowest temperature TF (F) (° C.) when it is assumed that the refrigeration apparatus 21A is stopped.

  The control device 30A predicts the minimum temperature TF (F) when it is assumed that the refrigeration device 21A is deactivated as described above, and at the time when the operation stop interval expires when it is assumed that the refrigeration device 21A is deactivated. Predict the temperature (temperature TF (R) when the operation stop interval expires). The temperature in the storage 12A gradually increases after reaching the minimum temperature with a delay of about 30 seconds after the operation of the refrigeration apparatus 21A is stopped. The control device 30A predicts the temperature when the operation stop interval of the refrigeration apparatus 21A expires from the temperature increase rate table indicating the relationship between the temperature in the storage 12A and the temperature increase rate.

The control device 30A determines whether the temperature TR detected by the temperature sensor 23A is equal to or higher than the above-described minimum temperature TF (F) and equal to or lower than the temperature TF (R) when the operation start interval expires (TF (F) ≦ TR ≦ TF (R )) Is determined (first determination condition), and the value obtained by subtracting the minimum temperature TF ( F ) from the set temperature TT is equal to or greater than the value obtained by subtracting the set temperature TT from the temperature TF ( R ) when the operation start interval expires. When the first and second determination conditions are satisfied, the operation of the refrigeration apparatus 21A is stopped.

  The first determination condition is to exclude a state in which the temperature in the storage 12A is not lowered because the temperature in the storage 12A falls after about 30 seconds from the start of the operation of the refrigeration apparatus 21A. is there. The second determination condition is for hunting to a minimum with the same temperature range up and down with the temperature in the storage 12A sandwiching the set temperature while observing the operation start interval of the refrigeration apparatus 21A.

In the refrigerator 10A configured as described above, by operating the refrigeration apparatus 21A, the temperature in the storage 12A is lowered to the set temperature. At this time, the control device 30A executes the first and second determination conditions based on the temperature detected by the temperature sensor 23A to control the operation of the refrigeration device 21A so that the temperature in the storage 12A maintains the set temperature. Be controlled.

  In the refrigerator 10A configured as described above, similarly to the heating cooker 10 described above, the temperature in the storage 12A is approximately the same up and down across the set temperature after observing the operation start interval of the refrigeration apparatus 21A. It was possible to perform hunting to the minimum with the temperature range, and it was possible to increase the accuracy of adjusting the temperature in the storage 12A.

  In the above embodiment, the temperature regulator composed of a heater or a refrigeration device cannot be operated at a low output (for example, lower than 20% of the maximum output) and is output at a medium output or higher (for example, 20% or higher). This is particularly effective for those that cannot be variably controlled.

 DESCRIPTION OF SYMBOLS 10 ... Temperature adjusting device (heating cooker), 10A ... Temperature adjusting device (refrigerator), 12 ... Storage (cooking), 12A ... Storage, 21 ... Temperature controller (heater), 21A ... Temperature controller (freezing) Device), 23, 23A ... temperature sensor, 30, 30A ... control device.

Claims (2)

A temperature controller for heating the interior of the storage;
A temperature sensor for detecting the temperature in the storage;
A control device for controlling the operation of the temperature regulator so that the temperature in the container becomes a predetermined set temperature based on the temperature detected by the temperature sensor;
In the temperature control device that is controlled so that the control device does not operate unless a predetermined operation start interval has elapsed,
When the control device that heat the inside of the accommodation chamber by operating the temperature controller, and the highest temperature at which the detection temperature detected by the temperature sensor the assumption that operation is stopped the temperature regulator, The operation start interval at the end of the operation start interval when it is assumed that the temperature regulator is stopped is predicted over time, and the temperature detected by the temperature sensor is equal to or lower than the maximum temperature and the operation start interval Control was made to stop the operation of the temperature regulator when the value obtained by subtracting the set temperature from the maximum temperature is equal to or higher than the value obtained by subtracting the temperature at the end of the operation start interval from the set temperature. A temperature control device characterized by that. A temperature regulator that cools the interior of the container;
A temperature sensor for detecting the temperature in the storage;
A control device for controlling the operation of the temperature regulator so that the temperature in the container becomes a predetermined set temperature based on the temperature detected by the temperature sensor;
In the temperature control device that is controlled so that the control device does not operate unless a predetermined operation start interval has elapsed,
When the controller is operating the temperature regulator to cool the inside of the storage, the minimum temperature when it is assumed that the temperature regulator is deactivated from the detected temperature detected by the temperature sensor; The operation start interval at the end of the operation start interval when the temperature regulator is assumed to be stopped is predicted over time, and the temperature detected by the temperature sensor is equal to or higher than the minimum temperature and the operation start interval Control was made to stop the operation of the temperature regulator when the value obtained by subtracting the minimum temperature from the preset temperature is equal to or less than the value obtained by subtracting the preset temperature from the expiry start interval temperature . Temperature control device characterized by that

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