JP2020148673A - Temperature adjuster, specification ambient temperature calculation method, and program - Google Patents

Abstract

To provide a temperature adjuster with which it is possible to ease the upper limit of a specification ambient temperature taking the actual state of use into account.SOLUTION: A temperature adjuster 10 comprises ambient temperature acquisition units, 70, 80, a component temperature detection unit 90, and a correction upper-limit ambient temperature calculation unit 60B. The ambient temperature acquisition units, 70, 80 acquire an ambient temperature Ta on the outside of a housing 10M of the temperature adjuster 10. The ambient temperature detection unit 90 detects a temperature Tp of a heat-generating component 40 that generates heat when operating inside of the housing 10M. The correction upper-limit ambient temperature calculation unit 60B calculates a correction upper-limit ambient temperature Tv usable by the temperature adjuster 10, using the ambient temperature Ta, the temperature Tp of the heat-generating component 40 when operating and a rated upper-limit temperature To of the heat-generating component 40.SELECTED DRAWING: Figure 2

Description

The present invention relates to a temperature controller, and more particularly to a temperature controller used under the condition that the temperature of the air surrounding the outside of the temperature controller (ambient temperature) is within the specified ambient temperature range. The present invention also relates to specification ambient temperature calculation methods and programs for such temperature controllers.

For example, as described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2018-112502), the temperature of a heater or the like that heats a heating object is measured with a thermocouple, and the result of the measurement is used by the heater. There is a temperature controller that controls the temperature of the object to be heated. In the same document, the current ambient temperature (external temperature) surrounding the outside of the temperature controller is calculated by conversion, and when the ambient temperature deviates from a predetermined threshold range, it is notified that an abnormality has occurred. It has become like.

JP-A-2018-112502

Conventionally, regardless of the actual usage state of the temperature controller, the fixed specification ambient temperature range (for example, -10 ° C to 55 ° C, etc.) described in the specifications of the temperature controller is used as the threshold range for determining an abnormality. ) Was used to uniformly determine the abnormality of the temperature controller and limit its use. For this reason, the user is dissatisfied that the upper limit of the ambient temperature range of the specification is strict.

Therefore, an object of the present invention is to provide a temperature controller, a specification ambient temperature calculation method, and a program capable of relaxing the upper limit of the specification ambient temperature in consideration of an actual usage state.

In order to solve the above problems, the temperature controller according to this disclosure is
A temperature controller with a housing
An ambient temperature acquisition unit that acquires the ambient temperature, which is the temperature of the air that surrounds the housing from the outside,
A component temperature detector that detects the temperature of heat-generating components that generate heat during operation in the housing,
Compensation upper limit ambient temperature calculation unit that calculates the usable correction upper limit ambient temperature of the temperature controller using the ambient temperature, the operating temperature of the heating component, and the rated upper limit temperature of the heating component. It is characterized by having and.

In the present specification, the ambient temperature acquisition unit "acquires" the ambient temperature by detecting and acquiring the ambient temperature by a temperature sensor and by conversion as described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2018-112502). Including the case of acquiring.

In the temperature controller according to the present disclosure, the ambient temperature acquisition unit acquires the ambient temperature, which is the temperature of the air surrounding the housing of the temperature controller from the outside. The component temperature detection unit detects the temperature of the heat-generating component that generates heat during operation in the housing. Then, the correction upper limit ambient temperature calculation unit uses the ambient temperature, the operating temperature of the heat generating component, and the rated upper limit temperature of the heat generating component to determine the usable correction upper limit ambient temperature of the temperature controller. ,calculate. As a result, the upper limit of the specified ambient temperature can be variably relaxed through the correction upper limit ambient temperature calculated in consideration of the actual usage state of the temperature controller.

In one embodiment of the temperature controller
When the ambient temperature is Ta, the operating temperature of the heating component is Tp, the rated upper limit temperature of the heating component is To, and the correction upper limit ambient temperature is Tv, the correction upper limit ambient temperature calculation unit is
Tv = (To-Tp) + Ta,
The above-mentioned correction upper limit ambient temperature is calculated by using.

In the temperature controller of this embodiment, it is possible to easily obtain the correction upper limit ambient temperature by directly using only the measurement temperature of the heat generating component, the ambient temperature of the temperature controller, and the predetermined rated upper limit temperature. it can.

In one embodiment of the temperature controller
The heat-generating component is a component having the smallest temperature margin, which is the difference between the predetermined upper limit temperature of the component and the operating temperature of the component among the plurality of components arranged in the housing. It is characterized by being.

In the temperature controller of this embodiment, if the temperature controller is used at the above-mentioned correction upper limit ambient temperature or less, the plurality of parts do not exceed the rated upper limit temperature of the parts, respectively.

The temperature controller of one embodiment is
It is characterized by further including a display device for displaying the correction upper limit ambient temperature.

The temperature controller of this embodiment allows the user to recognize the correction upper limit ambient temperature of the temperature controller through the display device.

The temperature controller of one embodiment is
When the correction upper limit ambient temperature becomes less than a preset threshold temperature, a notification device for notifying that the correction upper limit ambient temperature is less than the threshold temperature is further provided.

Therefore, the temperature controller allows the user to recognize the possibility of an abnormality in the calculated correction upper limit ambient temperature at an early stage.

In one embodiment of the temperature controller
It also has a cold contact connection terminal for the thermocouple connected to the temperature controller.
The ambient temperature acquisition unit
A terminal temperature detection unit, which is arranged in the housing and detects the temperature of the cold contact connection terminal,
In the housing, the terminal temperature detection unit is provided separately from the terminal temperature detection unit, and is provided with an internal temperature detection unit that detects the temperature inside the housing.

Therefore, it is possible to acquire the ambient temperature outside the temperature controller by using only the temperature detector arranged inside the housing of the temperature controller without providing a separate temperature detector on the outside of the temperature controller. it can.

In one embodiment of the temperature controller
The component temperature detection unit is characterized by being the internal temperature detection unit.

Therefore, one temperature detection unit can be used as a component temperature detection unit and an internal temperature detection unit. Therefore, the number of parts can be reduced.

In another aspect, the specification ambient temperature calculation method of this disclosure
A specification ambient temperature calculation method for a temperature controller that has a housing and operates parts arranged in the housing to control the temperature.
Obtain the ambient temperature, which is the temperature of the air surrounding the housing from the outside,
Detects the temperature of heat-generating parts that generate heat during operation in the above housing,
It is characterized in that the usable correction upper limit ambient temperature of the temperature controller is calculated by using the ambient temperature, the operating temperature of the heat generating component, and the rated upper limit temperature of the heat generating component.

In the specification ambient temperature calculation method according to this disclosure, the ambient temperature, which is the temperature of the air surrounding the housing of the temperature controller from the outside, is acquired. The temperature of the heat-generating component that generates heat during operation inside the housing is detected. Then, the usable correction upper limit ambient temperature of the temperature controller is calculated by using the ambient temperature, the operating temperature of the heat generating component, and the rated upper limit temperature of the heat generating component. As a result, the upper limit of the specified ambient temperature can be variably relaxed through the correction upper limit ambient temperature calculated in consideration of the actual usage state of the temperature controller.

In yet another aspect, the program of this disclosure is a program for causing a computer to execute a specification ambient temperature calculation method.

By having a computer execute the program of this disclosure, the above-mentioned specification ambient temperature calculation method can be implemented.

As is clear from the above, according to the temperature controller and the specification ambient temperature calculation method of the present disclosure, the upper limit of the specification ambient temperature can be variably relaxed in consideration of the actual usage state. Further, the above-mentioned specification ambient temperature calculation method can be implemented by causing a computer to execute the program of this disclosure.

It is a figure which shows the schematic structure of the temperature control system which concerns on this embodiment. It is a figure which shows the schematic structure of the temperature controller included in the temperature control system of FIG. It is a flowchart explaining the specification ambient temperature calculation method in the said temperature controller. It is a figure which schematically illustrated the relationship of each temperature including the rated upper limit temperature, the temperature of a heating part, and the ambient temperature. It is the figure which illustrated the relationship between each temperature including the rated upper limit temperature, the temperature of a heat generating component, and the ambient temperature, and the correction upper limit ambient temperature in a table format. It is a figure which illustrates other configuration example of the temperature controller included in the temperature control system of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of a temperature control system according to the present embodiment. The temperature control system includes a heating target 1, a heater 2, a fan 3, and a temperature controller 10.

The heater 2 heats the heating target 1 which is an external device. Further, the fan 3 can cool the heating target 1 and the heater 2. The temperature controller 10 includes a thermocouple 20 connected to the temperature controller 10. In the example of FIG. 1, the thermocouple 20 detects the temperature of the heater 2. The temperature controller 10 adjusts the temperature of the heating target 1 by the heater 2 or the like by using the measurement result of the thermocouple 20. That is, in the heat treatment of the heating target 1 by the heater 2, the heating temperature is adjusted by the temperature controller 10.

FIG. 2 shows a schematic configuration of the temperature controller 10 according to the present embodiment. The temperature controller 10 operates by receiving electric power supplied from the commercial power source 5. The temperature controller 10 has a housing 10M, and the housing 10M has a display device 25, an output unit 30, a notification device 35, a heat generating component 40, an amplifier-A / D device 45, a memory 50, and a cold contact connection terminal. 55, a processor 60, a terminal temperature detection unit 70, an internal temperature detection unit 80, and a component temperature detection unit 90 are arranged.

The thermocouple 20 detects the temperature of the heater 2 as described above. A cold contact connection terminal 55 is provided on the temperature controller 10, and the thermocouple 20 is connected to the cold contact connection terminal 55 from the outside of the housing 10M. The cold contact compensation unit including the cold contact connection terminal 55 compensates for the temperature of the thermocouple 20 in the temperature controller 10.

The display device 25 makes a predetermined display. For example, the display device 25 displays the temperature of the heater 2, which is the detection result of the thermocouple 20, the target temperature for temperature control, and the correction upper limit ambient temperature Tv, which will be described later. The output unit 30 is connected to the heater 2 and the fan 3. The output unit 30 transmits a control signal to the heater 2 and the fan 3 for temperature control. The notification device 35 uses sound, light, or the like to perform a predetermined notification. For example, when the correction upper limit ambient temperature Tv is less than a predetermined temperature threshold value, the notification device 35 indicates that the correction upper limit ambient temperature Tv is abnormal (that is, the correction upper limit ambient temperature Tv is less than the temperature threshold value). To that effect) is notified.

The heat generating component 40 is a component of the temperature controller 10 that generates heat during operation. As is clear from FIG. 2, a plurality of parts are arranged in the housing 10M of the temperature controller 10. As the heat generating component 40, one component that is arbitrarily selected from a plurality of components having heat generating properties may be adopted. In the present embodiment, the heat generating component 40 has the smallest temperature margin among the plurality of heat generating components. Here, the temperature margin is the difference between the rated upper limit temperature To predetermined for the component and the operating temperature Tp of the component. Here, the rated upper limit temperature To is the upper limit of the rated temperature range specified in advance for the component from the viewpoint of the temperature durability of the component, that is, the guarantee of the operation and performance of the component with respect to the temperature. Refers to temperature.

The component temperature detection unit 90 is arranged in the housing 10M and detects the temperature of the heat generating component 40. The terminal temperature detection unit 70 is separately arranged in the housing 10M apart from the component temperature detection unit 90. The terminal temperature detection unit 70 detects the temperature of the cold contact connection terminal 55. Further, in the example of FIG. 2, the internal temperature detection unit 80 is separately arranged in the housing 10M apart from the terminal temperature detection unit 70 and the component temperature detection unit 90. The internal temperature detection unit 80 detects the temperature inside the housing 10M.

The internal temperature detection unit 80 may detect the temperature of an arbitrarily selected portion in the housing 10M. For example, the internal temperature detection unit 80 may measure the average temperature in the housing 10M during operation, or may detect the maximum temperature in the housing 10M during operation.

It is desirable that the internal temperature detection unit 80 is installed at a position more easily affected by the heat generation source (including the heat generation component 40) in the housing 10M than the terminal temperature detection unit 70. For example, in the housing 10M during operation, the temperature at the location where the internal temperature detection unit 80 is arranged is higher than the temperature at the location where the terminal temperature detection unit 70 is arranged. Further, it is desirable that the temperature of the place where the terminal temperature detection unit 70 is arranged is the lowest in the operating housing 10M. The terminal temperature detection unit 70, the internal temperature detection unit 80, and the component temperature detection unit 90 are configured to include, for example, a thermistor.

Here, the temperature controller 10 has an ambient temperature acquisition unit that acquires the ambient temperature Ta. The ambient temperature Ta is the temperature of the air that surrounds the housing 10M of the temperature controller 10 from the outside. The ambient temperature acquisition unit may be a temperature sensor arranged outside the housing 10M that directly acquires the ambient temperature Ta. Here, the ambient temperature acquisition unit includes the terminal temperature detection unit 70 and the internal temperature detection unit 80. A method for calculating (acquiring) the ambient temperature Ta by using the detection temperature Tb of the terminal temperature detection unit 70 and the detection temperature Tin of the internal temperature detection unit 80 is described in JP-A-2018-112502. ing.

The amplifier-A / D device 45 receives a signal related to temperature, amplifies the signal, and converts the amplified signal into analog-digital conversion. As shown in FIG. 2, the amplifier-A / D device 45 is connected to the terminal temperature detection unit 70, the internal temperature detection unit 80, and the component temperature detection unit 90, from these detection units 70, 80, 90. , Receives an analog signal regarding the detected temperature. Further, the amplifier-A / D device 45 is connected to the cold contact connection terminal 55, and receives an analog signal regarding the detected temperature from the thermocouple 20. The amplifier-A / D device 45 is also connected to the processor 60, and outputs a digital signal (digital signal related to the detection temperature) after A / D conversion to the processor 60.

The memory 50 stores various data. The memory 50 includes a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. For example, various programs are stored in the memory 50. In addition, each data used for processing such as analysis of the processor 60 is stored in the memory 50. Further, the memory 50 may store the analysis result of the processor 60 and the like.

The processor 60 reads each program and each data stored in the memory 50. Further, the processor 60 controls each circuit in the temperature controller 10 according to the read program to execute a predetermined operation (function). Further, the processor 60 performs predetermined calculations, analyzes, processes, and the like in the processor 60 (blocks 60A, 60B, 60C composed of the programs) according to the read program. In the present embodiment, the program stored in the memory 50 includes a predetermined program that defines the specification ambient temperature calculation method described later. Therefore, the specification ambient temperature calculation method is implemented by causing the computer (processor 60) to execute the predetermined program.

In the processor 60, the ambient temperature calculation unit 60A calculates the ambient temperature Ta outside the housing 10M by using the temperature Tb of the cold contact connection terminal 55 and the temperature Tin inside the housing 10M. The correction upper limit ambient temperature calculation unit 60B uses the ambient temperature Ta, the temperature Tp of the heat generating component 40, and the rated upper limit temperature To of the heat generating component 40 to determine the usable correction upper limit ambient temperature Tv of the temperature controller 10. ,calculate. Further, the abnormality determination unit 60C determines the abnormality of the correction upper limit ambient temperature Tv by using the correction upper limit ambient temperature Tv and the threshold temperature. The blocks 60A to 60C will be described in detail in the description of the operation described later.

The processor 60 converts the signals output from the detection units 70, 80, 90 into temperature values in degrees Celsius. Further, the processor 60 calculates the temperature of the heater 2 measured by the thermocouple 20 from the relationship between the output from the terminal temperature detection unit 70 and the output from the cold contact connection terminal 55 (thermocouple 20).

Next, the operation of the temperature controller 10 (specification ambient temperature calculation method) will be described with reference to the flowchart of FIG. Here, the specification ambient temperature means the outside air environment temperature (ambient temperature) outside the housing 10M of the temperature controller 10 in which the temperature controller 10 can be used normally. Generally, when the temperature controller 10 is used in an environment outside the specified ambient temperature range, the operation and performance of the temperature controller 10 are not guaranteed.

In step S1, the user stores predetermined data to be used in the subsequent processing in the memory 50 of the temperature controller 10. Here, the predetermined data is, for example, a calculation formula used when calculating the ambient temperature Ta (see step S2) and a calculation formula used when calculating the correction upper limit ambient temperature Tv (see step S3). And the threshold temperature used for determining the abnormality of the rated upper limit temperature To and the correction upper limit ambient temperature Tv (see step S5). For example, an external terminal such as a personal computer or a mobile terminal is communicably connected to the temperature controller 10. By the connection, predetermined data is set (stored) in the memory 10 via the external terminal.

In step S2, the processor 60 of the temperature controller 10 detects the temperature of the heater 2 detected by the thermocouple 20, the temperature Tb of the cold contact connection terminal 55 detected by the terminal temperature detection unit 70, and the internal temperature detection unit 80. The temperature Tin in the housing 10M and the temperature Tp of the heat generating component 40 detected by the component temperature detecting unit 90 are acquired.

Further, in step S2, the ambient temperature calculation unit 60A of the processor 60 uses the temperature Tb of the cold contact connection terminal 55, the temperature Tin in the housing 10M, and the calculation formula recorded in the memory 50 to generate the ambient temperature. Calculate (acquire) Ta. Here, the temperature Tb and the temperature Tin are those obtained above. The calculation formula is Ta = Tb-Tg, Tg = (Tin-Tb) x α + β. The above calculation formula including the correction coefficients α and β, and the content of obtaining the ambient temperature Ta using the calculation formula are described in JP-A-2018-112502.

Next, in step S3, the correction upper limit ambient temperature calculation unit 60B of the processor 60 uses the ambient temperature Ta, the temperature Tp of the heat generating component 40, the rated upper limit temperature To, and the calculation formula of the temperature controller 10. The usable correction upper limit ambient temperature Tv is calculated. The correction upper limit ambient temperature Tv is obtained by correcting the specified ambient temperature of the temperature controller 10 (particularly, the upper limit specified ambient temperature) specified in the specifications in consideration of the actual temperature of the temperature controller 10. is there. Here, the ambient temperature Ta is a value acquired in step S2. The temperature Tp is the temperature of the heat-generating component 40 detected during the operation of the heat-generating component 40 acquired in step S2. Further, the rated upper limit temperature To is the highest value in the rated temperature range predetermined in the heat generating component 40 acquired in step S1.

An example of the calculation formula used when calculating the correction upper limit ambient temperature Tv is obtained from the following three formulas. That is, Tv = (Tc-Tj) + Ta, Tc = To-Ta, and Tj = Tp-Ta.

Here, Ta is the ambient temperature Ta acquired in step S2 as described above. Further, as can be seen from the second equation above, the temperature Tc is the difference between the rated upper limit temperature To of the heat generating component 40 and the ambient temperature Ta (see FIG. 4). Further, as can be seen from the third equation, the temperature Tj is the difference between the temperature Tp of the heat generating component 40 during operation and the ambient temperature Ta (see FIG. 4).

The second equation is substituted for the temperature Tc of the first equation, and the third equation is substituted for Tj of the first equation. Then, as an example, the calculation formula Tv = (To-Tp) + Ta, which is used when calculating the correction upper limit ambient temperature Tv, is obtained. As the calculation formula shows, in step S3 of FIG. 3, the correction upper limit ambient temperature calculation unit 60B is the ambient temperature Ta acquired in step S2 and the heat generating component during operation detected by the component temperature detection unit 90. Using the temperature Tp of 40 and the rated upper limit temperature To of the heat generating component 40 specified in advance, the usable correction upper limit ambient temperature Tv of the temperature controller 10 is calculated.

As can be seen from FIG. 4 and the above formula, a margin for temperature rise of the heat generating component 40 can be obtained from the difference between the rated upper limit temperature To and the current temperature Tp of the heat generating component 40. By adding the margin of the temperature rise to the current ambient temperature Ta, the correction upper limit ambient temperature Tv can be obtained.

Next, in step S4, the processor 60 controls the display device 25, and the display device 25 displays the correction upper limit ambient temperature Tv calculated in step S3. Further, the temperature controller 10 may transmit the correction upper limit ambient temperature Tv to an external device via the communication network.

Next, in step S5, the abnormality determination unit 60C of the processor 60 determines whether or not the correction upper limit ambient temperature Tv is less than the preset threshold temperature. When the correction upper limit ambient temperature Tv is less than the preset threshold temperature (“Yes” in step S5), the processor 60 controls the notification device 35, and the notification device 35 controls the calculated correction upper limit ambient temperature Tv. Notifies that is abnormal (step S6). Then, the process of FIG. 3 ends. On the other hand, when the correction upper limit ambient temperature Tv is equal to or higher than the preset threshold temperature (“No” in step S5), the process of FIG. 3 ends.

The flow of steps S2 to S6 of FIG. 3 is performed, for example, at predetermined time intervals. Then, at the time of each implementation, the ambient temperature Ta is acquired, the temperature Tp of the heat generating component 40 is acquired, the correction upper limit ambient temperature Tv is calculated using these, and it is determined that the correction upper limit ambient temperature Tv is abnormal. When it is done, the fact is notified.

In addition, in FIG. 5, each temperature Ta, Tc, Tp, Tj (° C.) obtained from the flow of FIG. 3 and the correction upper limit ambient temperature Tv (° C.) calculated from these temperatures Ta, Tc, Tp, Tj are shown. The relationship between is illustrated in tabular form. Here, as is clear from FIG. 5, in the example of FIG. 5, the rated upper limit temperature To of the heat generating component 40 is 85 ° C. Further, as can be seen from FIG. 5, the correction upper limit ambient temperature Tv is changed in consideration of the operation of the temperature controller 10 (the temperature at the time of the operation of the heat generating component 40).

Here, the correction upper limit ambient temperature calculation unit 60B may calculate the correction upper limit ambient temperature Tv using two calculation formulas, Tv = (Tc'-Tj) + Ta and Tj = Tp-Ta. .. Here, as described above, Ta is the ambient temperature Ta, and Tp is the operating temperature Tp of the heat generating component 40. Further, the temperature Tc'is a predetermined value. With respect to the temperature Tc', the user performs a test operation of the temperature controller 10 and measures the temperature of the heat generating component 40 during the test operation. Here, the test operation may be performed within the fixed specified ambient temperature range described in the specifications of the temperature controller 10 under the condition that the highest heat generation is generated in the temperature controller 10. Then, based on a predetermined conversion rule using the rated upper limit temperature To of the heat generating component 40, the measurement result is converted into the temperature Tc', and the converted temperature Tc'is stored in the memory 50 in advance.

Further, in the configuration example of FIG. 2, the internal temperature detection unit 80 is arranged in the housing 10M separately from the component temperature detection unit 90. On the other hand, the configuration illustrated in FIG. 6 may be adopted. In the configuration example of FIG. 6, the component temperature detection unit 90 is used as the internal temperature detection unit 80 (that is, it also functions as the internal temperature detection unit 80) from the viewpoint of reducing the number of components. Therefore, in the example of FIG. 6, the internal temperature detection unit 80 is omitted as a physical configuration. In the example of FIG. 6, the component temperature detection unit 90 detects the temperature Tp of the heat generating component 40, and the temperature Tp is also used as the temperature Tin in the housing 10M.

As described above, in the temperature controller 10 according to the present embodiment, the ambient temperature acquisition unit (terminal temperature detection unit 70 and internal temperature detection unit 80) is the ambient temperature outside the housing 10M of the temperature controller 10. Get Ta. The component temperature detection unit 90 detects the temperature Tp of the heat generating component 40. Then, the correction upper limit ambient temperature calculation unit 60B uses the ambient temperature Ta, the temperature Tp of the heat generating component 40, and the rated upper limit temperature To of the heating component 40 to use the usable correction upper limit ambient temperature Tv of the temperature controller 10. Is calculated. As a result, the upper limit of the specified ambient temperature can be variably relaxed through the calculation of the correction upper limit ambient temperature Tv in consideration of the actual usage state of the temperature controller 10.

Further, in the temperature controller 10 according to the present embodiment, the correction upper limit ambient temperature calculation unit 60B calculates the correction upper limit ambient temperature Tv using Tv = (To-Tp) + Ta. Therefore, the correction upper limit ambient temperature Tv can be easily obtained by directly using only the ambient temperature Ta, the temperature Tp of the heat generating component 40, and the rated upper limit temperature To.

Further, in the temperature controller 10 according to the present embodiment, the heat generating component 40 is a component having the smallest temperature margin among the plurality of components arranged in the housing 10M of the temperature controller 10. Therefore, if the temperature controller 10 is used at the above-mentioned correction upper limit ambient temperature Tv or less, the plurality of parts do not exceed the rated upper limit temperature of each part.

Further, the temperature controller 10 according to the present embodiment further includes a display device 25 that displays the correction upper limit ambient temperature Tv. Therefore, through the display device 25, the user can recognize the correction upper limit ambient temperature Tv of the temperature controller 10.

Further, the temperature controller 10 according to the present embodiment further includes a notification device 35 that notifies that the correction upper limit ambient temperature Tv is less than the threshold temperature when the correction upper limit ambient temperature Tv becomes less than the threshold temperature. .. Therefore, the user can recognize the possibility of abnormality of the calculated correction upper limit ambient temperature Tv at an early stage.

Further, in the temperature controller 10 according to the present embodiment, a terminal temperature detection unit 70 that detects the temperature Tb of the cold contact connection terminal 55 and an internal temperature detection unit 80 that detects the temperature Tin in the temperature controller 10 are used. And the ambient temperature Ta is acquired. Therefore, without providing a separate temperature detection unit on the outside of the housing 10M of the temperature controller 10, only the temperature detection units 70 and 80 arranged in the housing 10M are used to surround the outside of the housing 10M. The temperature Ta can be obtained.

As illustrated in FIG. 6, the component temperature detection unit 90 may also be the internal temperature detection unit 80 (that is, the component temperature detection unit 90 may also function as the internal temperature detection unit 80). Therefore, one temperature detection unit can be used as the component temperature detection unit 90 and the internal temperature detection unit 80. Therefore, the number of parts can be reduced.

The above embodiment is an example, and various modifications can be made without departing from the scope of the present invention. Each of the plurality of embodiments described above can be established independently, but combinations of the embodiments are also possible. Further, although various features in different embodiments can be established independently, it is also possible to combine features in different embodiments.

10 Temperature controller 20 Thermocouple 25 Display device 35 Notification device 40 Heat generating component 55 Cold contact connection terminal 60 Processor 60B Correction upper limit Ambient temperature calculation unit 70 Terminal temperature detection unit 80 Internal temperature detection unit 90 Parts temperature detection unit

Claims (9)

A temperature controller with a housing
An ambient temperature acquisition unit that acquires the ambient temperature, which is the temperature of the air that surrounds the housing from the outside,
A component temperature detector that detects the temperature of heat-generating components that generate heat during operation in the housing,
Compensation upper limit ambient temperature calculation unit that calculates the usable correction upper limit ambient temperature of the temperature controller using the ambient temperature, the operating temperature of the heating component, and the rated upper limit temperature of the heating component. And prepare
air conditioner. In the temperature controller according to claim 1,
When the ambient temperature is Ta, the operating temperature of the heating component is Tp, the rated upper limit temperature of the heating component is To, and the correction upper limit ambient temperature is Tv, the correction upper limit ambient temperature calculation unit is
Tv = (To-Tp) + Ta,
Is used to calculate the correction upper limit ambient temperature.
A temperature controller characterized by that. In the temperature controller according to claim 1,
The heat-generating component is a component having the smallest temperature margin, which is the difference between the predetermined upper limit temperature of the component and the operating temperature of the component among the plurality of components arranged in the housing. Is,
A temperature controller characterized by that. In the temperature controller according to claim 1,
Further equipped with a display device for displaying the above correction upper limit ambient temperature.
A temperature controller characterized by that. In the temperature controller according to claim 1,
Further provided is a notification device for notifying that the correction upper limit ambient temperature is less than the threshold temperature when the correction upper limit ambient temperature becomes less than a preset threshold temperature.
A temperature controller characterized by that. In the temperature controller according to claim 1,
It also has a cold contact connection terminal for the thermocouple connected to the temperature controller.
The ambient temperature acquisition unit
A terminal temperature detection unit, which is arranged in the housing and detects the temperature of the cold contact connection terminal,
In the housing, an internal temperature detection unit is provided, which is arranged separately from the terminal temperature detection unit and detects the temperature inside the housing.
A temperature controller characterized by that. In the temperature controller according to claim 6,
The component temperature detection unit is the internal temperature detection unit.
A temperature controller characterized by that. A specification ambient temperature calculation method for a temperature controller that has a housing and operates parts arranged in the housing to control the temperature.
Obtain the ambient temperature, which is the temperature of the air surrounding the housing from the outside,
Detects the temperature of heat-generating parts that generate heat during operation in the above housing,
Using the ambient temperature, the operating temperature of the heating component, and the rated upper limit temperature of the heating component, the usable correction upper limit ambient temperature of the temperature controller is calculated.
Specifications Ambient temperature calculation method. A program for causing a computer to execute the specification ambient temperature calculation method according to claim 8.

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