KR20240018051A - Electronic Device for Controlling Temperature of Heating Device - Google Patents

Abstract

The electronic device for controlling the temperature of the heat-generating device of the present disclosure includes a cooling module disposed adjacent to the heat-generating device and controlling the temperature of the heat-generating device based on the current value of the received control current, the cooling module, and the heat-generating device. a temperature sensor that senses a temperature value from at least one of the following, a memory that stores the current value of the control current transmitted to the cooling module and the amount of change in the temperature value received from the temperature sensor according to the amount of change in the current value; A processor that receives a temperature value and outputs a PWM pulse signal and a fan control signal based on the amount of temperature value change according to the amount of change in the current value stored in the memory, and outputs the control current based on the PWM pulse signal and the fan control signal. It may include a controller that outputs output to the cooling module.

Description

Electronic Device for Controlling Temperature of Heating Device}

The technical idea of the present disclosure relates to electronic devices, and more specifically, to electronic devices that control the temperature of a heating device.

In the case of conventional temperature control devices, the amount and direction of current flowing through the Peltier element are controlled using a power supply and a high-current amplifier, so material costs are high and power consumption efficiency is low, so the overall power consumption of the device is large. In addition, if a digital control method is not added, the tolerance of temperature control cannot be adjusted, and since the precision of the temperature that needs to be adjusted is different for each control object, the digital control method must always be used in parallel, which causes the problem of increasing the material cost of device construction. there was.

The problem to be solved by the technical idea of the present disclosure is to provide a method for precisely controlling the temperature of a heat-generating device by digitizing data received from the heat-generating device.

According to an embodiment of the present disclosure, the electronic device for controlling the temperature of the heat-generating device includes a cooling module disposed adjacent to the heat-generating device and controlling the temperature of the heat-generating device based on a current value of a received control current, the cooling module A temperature sensor that senses a temperature value from at least one of the module and the heating device, a memory that stores the current value of the control current transmitted to the cooling module and the amount of change in the temperature value received from the temperature sensor according to the amount of change in the current value, A processor that receives the temperature value from the temperature sensor and outputs a PWM pulse signal and a fan control signal based on a change in temperature value according to a change in current value stored in the memory, and based on the PWM pulse signal and the fan control signal. It may include a controller that outputs the control current to the cooling module.

According to one embodiment, the processor includes a first ADC circuit for converting the temperature value received as an analog value into a digital temperature value and a second ADC for converting the current value of the control current received as an analog value into a digital current value. May include circuits.

According to one embodiment, the processor may adjust the duty ratio and sign of the PWM pulse signal based on the difference between the digital temperature value and the target digital temperature value.

According to one embodiment, the sign of the PWM pulse signal when the digital temperature value is higher than the target digital temperature value and the sign of the PWM pulse signal when the digital temperature value is lower than the target digital temperature value are opposite. It can be characterized.

According to one embodiment, the processor may receive feedback on the temperature value and the current value of the control current and update the amount of change in the temperature value according to the amount of change in the current value stored in the memory.

According to one embodiment, the controller may increase and output the current value of the control current in response to an increase in the duty ratio of the PWM pulse signal and the level of the fan control signal.

According to one embodiment, the control current consists of a Peltier control current and a cooling fan control current, and the controller outputs a Peltier control current with a current value determined based on the PWM pulse signal to the Peltier module included in the cooling module. It may include a Peltier controller that outputs a cooling fan control current of a current value determined based on the fan control signal and a fan controller that outputs a cooling fan included in the cooling module.

According to one embodiment, the controller may include a shunt resistance module disposed between the Peltier controller and the Peltier module to measure a current value of the Peltier control current.

An electronic device according to an embodiment of the present disclosure is a temperature control method tailored to a heat-generating device by databaseing the amount of temperature value change for the amount of current value change based on the current value provided to the cooling module and the temperature value received from the cooling module or the heat-generating device. can be provided. In addition, electronic devices can precisely compare current and temperature values by digitizing them, and the The temperature of the heating device can be controlled within the error range.

The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned are common knowledge in the technical field to which the exemplary embodiments of the present disclosure belong from the following description. It can be clearly derived and understood by those who have it. That is, unintended effects resulting from implementing the exemplary embodiments of the present disclosure may also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

1 is a block diagram schematically showing configurations according to an embodiment of the present disclosure.
Figure 2 is a block diagram showing transmission and reception signals between components according to an embodiment.
Figure 3 is a flowchart showing a method of operating an electronic device according to an embodiment.
Figure 4 is a timing diagram of transmitted and received signals that perform temperature control according to one embodiment.
5 is a flowchart illustrating a method of adjusting a PWM pulse signal by calculating a temperature error according to one embodiment.

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

1 is a block diagram schematically showing configurations according to an embodiment of the present disclosure.

Referring to FIG. 1 , the electronic device of the present disclosure may include a cooling module 110, a temperature sensor 120, a memory 130, a processor 140, and a controller 150. The cooling module 110 of the electronic device may include a Peltier module 111 and a cooling fan 112, and may further include a heat sink that exhausts heat from the heating unit to the outside through the cooling fan 112. The controller 150 may include a Peltier controller 151, a fan controller 152, and a shunt resistance module 153. The control circuit may include a first analog-to-digital converter (ADC) circuit 141, a second ADC circuit 142, and a control signal generator 143.

When the Peltier module 111 is activated, one side can output cooled air, and the other side can output heated air. At this time, the Peltier module 111 of the present disclosure may have one side that outputs cooled air and the other side that discharges heated air determined differently depending on the direction of the provided current. As an example, the Peltier module 111 that receives the current in the first direction may output cooled air to the first side and discharge heated air to the second side. On the other hand, the Peltier module 111 that receives the current in the second direction opposite to the first direction may discharge heated air to the first side and cooled air to the second side. That is, the Peltier module 111 can control the temperature of the heating device by providing heated air or cooled air to the heating device according to the direction of the received Peltier control current.

The cooling fan 112 may be disposed adjacent to the Peltier module 111, and according to one embodiment, transfers heat generated from the Peltier module 111 between the cooling fan 112 and the Peltier module 111. A heat sink may be placed. The cooling fan 112 may be located on the opposite side of the heating device based on the Peltier module 111, and receives heated air from the Peltier module 111 when the Peltier module 111 provides cooled air to the heating device. It can be discharged to the outside.

The temperature sensor 120 may be attached to or placed adjacent to the cooling module 110 or the heating device. The temperature sensor 120 is not limited to either a contact temperature sensor or a non-contact temperature sensor. Contact temperature sensors may include thermocouples, thermistors, and resistance temperature detectors (RTDs). It is not limited to this, and may include a liquid expansion temperature sensor that uses expansion of a liquid depending on temperature, and a bimetal temperature sensor that uses the thermal expansion rate of a metal depending on temperature. Non-contact temperature sensors include infrared thermometers, which detect temperature by infrared rays, and can also measure temperature through the amount of radiation emitted by the surface of an object.

The processor 140 may receive the temperature value sensed from the temperature sensor 120 and the current value output from the controller 150 and form a database, and the controller 150 may receive the temperature value sensed from the temperature sensor 120 and the current value output from the controller 150. ) can transmit a PWM pulse signal and a fan control signal. According to one embodiment, the duty ratio and sign of the PWM pulse signal can be adjusted according to the difference between the received temperature value and the target temperature value, and the level of the fan control signal can be adjusted.

According to one embodiment, the processor 140 may map the temperature value change according to the current value change before performing temperature value compensation, and store the temperature value change according to the mapped current value change in the memory 130. You can. When the electronic device performs temperature control by operating the heat-generating device, the processor 140 can control the temperature of the heat-generating device by receiving mapping data from the memory 130 and adjusting the current value.

The processor 140 may digitize the temperature and current values received as analog values. According to one embodiment, the first ADC circuit 141 may convert the received temperature value into a digitized digital temperature value, and the second ADC circuit 142 may convert the received current value into a digital current value. there is. The first ADC circuit 141 and the second ADC circuit 142 sample the received analog temperature value and analog current value, and depending on whether the level of the sampled value falls within a plurality of divided level ranges, It can be converted to digital current value and digital temperature value.

The control signal generator 143 may compare the digitally converted temperature value with the target temperature value and adjust the PWM pulse signal and fan control signal based on the comparison result. At this time, when the digitally converted temperature value and the target temperature value are the same, the control signal generator 143 may output the same PWM pulse signal and fan control signal as the previously output signal.

According to one embodiment, the processor 140, which calculates the PWM pulse signal and fan control signal output to adjust the current value, and the memory 130, which stores the amount of temperature change and current change, are implemented as an Arduino system. It can be. The Arduino system is an open source computing platform and software development environment based on a microcontroller (150) board that allows users to easily change settings.

The controller 150 may receive a control signal from the processor 140 and adjust the current value provided to the Peltier module 111 and the cooling fan 112 based on the control signal. The Peltier controller 151 can adjust the direction and size of the Peltier control current according to the duty ratio and sign of the PWM control signal, and the Peltier module 111 can adjust the direction and size of the Peltier control current to provide cooled air. and cooling temperature can be determined. The Peltier controller 151 may be composed of an H-Bridge circuit, and the H-Bridge circuit may be an electronic circuit that switches the polarity of the voltage applied to the load. That is, the Peltier controller 151 can facilitate switching between heating and cooling operations on one side of the Peltier element by switching the polarity of the voltage provided to the Peltier module 111.

As the size of the Peltier control current increases, the Peltier module 111 lowers the cooling temperature and can provide cooled air to the heating device. As the Peltier control current decreases, the Peltier module 111 lowers the cooling temperature. It can be set lower to provide cooled air to the heating device.

The fan controller 152 can adjust the rotation speed of the cooling fan 112 according to the level of the fan control signal. As an example, as the size of the fan control current increases, the cooling fan 112 may rotate faster, and as the fan control current decreases, the cooling fan 112 may rotate less frequently.

The shunt resistance module 153 can measure the magnitude of the Peltier control current provided to the cooling module 110 and provide the measured current value to the processor 140. The shunt resistance module 153 can measure the current flowing through the resistor as a voltage value.

The heating device of the present disclosure may be a gain medium unit of a laser, and specifically may be a gain medium unit including at least one of single crystal, glass, and ceramic crystal. However, this is only an example, and the heat-generating device may be a variety of electronic devices/components that emit heat in addition to a solid-state laser.

Meanwhile, according to an embodiment of the present disclosure, when the heating device is a gain medium part of a solid-state laser, the cooling module 110 may be formed radially and spaced apart at a predetermined angle with the gain medium crystal core as the center. For example, the cooling modules 110 may be radially spaced at 60-degree intervals around the crystal core, so that six cooling modules 110 may be formed to surround the outer shell of the crystal core in a circle, but the present invention is not limited to this.

In Figure 1, one cooling module 110 is shown to include one Peltier module 111 and a cooling fan 112. However, the Peltier module 111 and the cooling fan 112 of the cooling module 110 are 1: It may not match 1. Additionally, the temperature sensor 120 may also be arranged in accordance with the number and location of the cooling fans 112. According to the above embodiment, the temperature sensor 120 can detect the temperature of the heating device portion where each cooling fan 112 is located.

When six cooling modules 110 are formed as in the example above, six Peltier modules 111 can be formed spaced apart at 60-degree intervals, and 12 cooling fans 112 can be formed spaced apart at 30-degree intervals. there is. In other words, one cooling module 110 can be formed so that two cooling fans 112 are spaced from one Peltier module 111 and matched to each other at a certain distance. Additionally, two temperature sensors 120 may detect the temperature of a portion of the crystal core corresponding to one Peltier module 111 at a predetermined distance. That is, for a portion of the crystal core, one Peltier module 111, two temperature sensors 120, and two cooling fans 112 can perform a cooling function.

In the example above, the processor 140 may transmit a PWM pulse signal to the controller 150 based on the higher temperature among the sensing temperature values received from the two temperature sensors 120, and the temperature sensor ( The cooling fan 112 corresponding to 120) may transmit a fan control signal to the controller 150 to more quickly discharge heated air to the outside.

According to the above embodiment, when performing customized temperature control for a heating device based on a database, in some cases, the temperature can be controlled by reducing the error even for a heating device in which all parts are heated unevenly. There is.

Figure 2 is a block diagram showing transmission and reception signals between components according to an embodiment.

Referring to FIG. 2, the processor 140 may receive a temperature feedback value (TFB) and a current feedback value (CFB), and transmit a PWM pulse signal (PWM) and a fan control signal (FCS) to the controller 150. can do. The temperature feedback value (TFB) and current feedback value (CFB) may be analog values received from the temperature sensor 120 and the shunt resistance module 153 while the electronic device is operating, and the processor 140 converts the analog values into digital values. It can be converted and stored in the memory 130.

According to one embodiment, when it is determined that temperature adjustment is necessary, the processor 140 changes the Peltier control current (PCC) and fan control current (FCC) values based on the database of the previously stored memory 130. The output PWM pulse signal (PWM) and fan control signal (FCS) can be adjusted. At this time, the processor 140 may receive the Peltier control current (PCC) value changed according to the adjusted PWM pulse signal (PWM) and the fan control signal (FCS) as a current feedback value (CFB), and the temperature sensor 120 ) can be received as a temperature feedback value (TFB).

Processor 140 may calculate the difference between the received current feedback value (CFB) and the current feedback value before adjustment (CFB), and calculate the difference between the received temperature feedback value (TFB) and the temperature feedback value before adjustment (TFB). there is. The processor 140 may calculate the temperature difference value for the current difference value as the current-temperature change amount and update the previously stored current-temperature change amount.

According to one embodiment, the processor 140 may update the previously stored current-temperature change amount by averaging the previously stored current-temperature change amount and the current-temperature change amount calculated by the processor 140.

According to another embodiment, the processor 140 may classify the amount of current-temperature change according to a plurality of temperature ranges and store them in the memory 130. The processor 140 may determine whether the fed back temperature feedback value (TFB) falls within one of the divided temperature ranges, and the existing current-temperature change amount corresponding to the temperature range may be equal to the calculated current-temperature change amount. You can determine whether they are the same. If the processor 140 determines that the existing current-temperature change amount and the calculated current-temperature change amount are not the same, the processor 140 may update the current-temperature change amount by averaging the existing current-temperature change amount and the calculated current-temperature change amount. The cooling efficiency according to the supplied current is not standardized for each of the plurality of temperature ranges, and the processor 140 of the present disclosure can accurately control the temperature of the heating device by separately managing the current-temperature change amount for each temperature range. You can.

The Peltier controller 151 can adjust the size of the output Peltier control current (PCC) according to the duty ratio of the provided PWM pulse signal (PWM), and the fan controller 152 can adjust the level of the provided fan control signal (FCS). The size of the output fan control current (FCC) can be adjusted accordingly. The method by which the Peltier control current (PCC) and fan control current (FCC) are adjusted will be described in detail later with reference to FIG. 4. The shunt resistance module 153 may be placed between the cooling module 110 and the Peltier controller 151 to measure the Peltier control current (PCC).

The cooling module 110 may include a Peltier module 111 and a cooling fan 112, and heat sinks may be disposed on one side and the other side of the Peltier module 111. The heat sink may transfer heat and cold generated from the Peltier module 111 to a configuration disposed on the opposite side of the Peltier module 111. As an example, a heat sink located above the Peltier module 111 may transfer heat and cold air to a heating device, and a heat sink located below the Peltier module 111 may transfer heat and cold air to the cooling fan 112.

The cooling fan 112 can air cool the Peltier module 111 and the heat sink by dissipating heat from the Peltier module 111 transferred through a heat sink located below the Peltier module 111 to the outside. The cooling fan 112 may receive a fan control current (FCC) from the fan controller 152, and the rotation speed of the cooling fan 112 may be adjusted depending on the size of the fan control current (FCC). For example, when a low value of the fan control current (FCC) is received, the rotation speed of the cooling fan 112 may be slow, and when a high value of the fan control current (FCC) is received, the rotation speed of the cooling fan 112 may be slow. The speed can be fast. That is, a high fan control current (FCC) can quickly cool the Peltier module 111 and the heat sink, thereby maximizing the efficiency of the Peltier module 111.

The Peltier module 111 may receive a Peltier control current (PCC) from the Peltier controller 151, and the cooling temperature of the Peltier module 111 may be determined depending on the size of the Peltier control current (PCC). As an example, one side of the Peltier module 111 emits cooled air and the other side emits heated air depending on the direction of the input current. Depending on the size of the current, the Peltier module 111 emits cooled air and heated air. The temperature difference increases. That is, a high Peltier Control Current (PCC) can provide heated air to a high temperature or cooled air to a low temperature to a heating device.

Figure 3 is a flowchart showing a method of operating an electronic device according to an embodiment.

Referring to FIG. 3, as the heating device operates, the current temperature value can be periodically measured to adjust the temperature of the heating device, and the current value provided to the cooling module 110 can be adjusted according to the state of the current temperature value. there is. At this time, the processor 140 may calculate the current value to be adjusted by loading the temperature-current change amount stored from the memory 130.

In step S110, the processor 140 may set a target temperature value in response to user manipulation. The target temperature value may be a temperature value for the heating device to perform ideal operation, and may be 0.1 Can be set in units.

In step S120, the temperature sensor 120 may measure the current temperature value and provide it to the processor 140. Referring to FIG. 2, the current temperature value may be a temperature feedback value (TFB).

In step S130, the processor 140 may determine whether the current temperature value is the same as the target temperature value set in step S110, and if so, the current temperature value can be measured in the next cycle without adjusting the current value. there is.

In step S140, when the current temperature value and the target temperature value are different, the processor 140 may calculate an error between the current temperature value and the target temperature value. According to one embodiment, comparing temperature values may be comparing digitally converted data. Temperature error calculation based on comparison of digitally converted data will be described in detail later in FIG. 5.

In step S150, the processor 140 may adjust the current value according to the temperature error. According to one embodiment, the processor 140 may adjust the duty ratio and sign of the PWM pulse signal (PWM) output to the controller 150, and the level of the fan control signal (FCS). The controller 150 controls the current value of the Peltier control current (PCC) provided to the cooling module 110 and the fan control current ( The current value of FCC) can be adjusted.

Figure 4 is a timing diagram of transmitted and received signals that perform temperature control according to one embodiment.

Referring to FIG. 4, the processor 140 may output a PWM pulse signal (PWM) and a fan control signal (FCS) to the controller 150, and the controller 150 may output the PWM pulse signal (PWM) and the fan control signal. Based on (FCS), Peltier control current (PCC) and fan control current (FCC) can be output to the cooling module 110. At this time, the processor 140 may adjust the duty ratio of the PWM pulse signal (PWM) and the level of the fan control signal (FCS) based on the temperature value and current value that are fed back and received.

The processor 140 may output a PWM pulse signal (PWM) having a high level during a first time period (T1) in one cycle to the controller 150, and the controller 150 may output the PWM pulse signal (PWM) to the controller 150. Based on this, a Peltier control current (PCC) having a first current value (i1) may be output. The Peltier module 111 of the cooling module 110 may provide cooling air or heating air corresponding to the first current value i1 to the heat generating device.

According to one embodiment, when the processor 140 determines that the current temperature value sensed from the temperature sensor 120 is the same as the target temperature value, the processor 140 does not output the PWM pulse signal (PWM), and the controller 150 outputs the Peltier control current. (PCC) may not be output.

The processor 140 may output a fan control signal (FCS) having a first level (LV1) to the controller 150, and the controller 150 may output a fan control signal (FCS) having a third current value based on the fan control signal (FCS). Fan control current (FCC) can be output. The cooling fan 112 of the cooling module 110 may cool the heat sink and the Peltier module 111 by operating at a rotation speed corresponding to the third current value i3.

According to one embodiment, when the processor 140 determines that the current temperature value sensed from the temperature sensor 120 is the same as the target temperature value, the processor 140 does not output the fan control signal (FCS), and the controller 150 outputs the fan control current. (FCC) may not be output.

If the processor 140 determines that the received current temperature value is different from the target temperature value, the processor 140 may adjust the duty ratio and sign of the PWM pulse signal (PWM) and the level of the fan control signal (FCS). For example, if the processor 140 determines that the current temperature value is higher than the target temperature value, the heat generating device must be cooled more strongly, and thus the duty ratio of the PWM pulse signal (PWM) is set to high during the second time period (T2). It can be increased to have a level, and the level of the fan control signal (FCS) can be further increased. The controller 150, which receives the PWM pulse signal (PWM) with an increased duty ratio, may output a Peltier control current (PCC) with a second current value (i2) that is higher than the first current value (i1). In addition, the controller 150, which has received the fan control signal (FCS) whose level has increased to the second level (LV2), receives the fan control current (FCC) of the fourth current value (i4) higher than the third current value (i3). can be output.

According to one embodiment, when the processor 140 determines that the received current temperature value is lower than the target temperature value, the Peltier module 111 must output heated air to the heating device, so that the existing PWM pulse signal (PWM) A PWM pulse signal (PWM) with a polarity opposite to the polarity can be output. As an example, if it is determined that the received current temperature value is lower than the target temperature value and the previous processor 140 outputs a (+) direction PWM pulse signal (PWM), the (-) direction PWM pulse signal (PWM ) can be output.

FIG. 5 is a flowchart illustrating a method of adjusting a PWM pulse signal (PWM) by calculating a temperature error according to one embodiment.

Referring to FIG. 5, the processor 140 may convert the temperature value and current value into digital values based on the first ADC circuit 141 and the second ADC circuit 142, and the processor 140 may convert the digital values to digital values. Based on this, the target digital temperature value and the current digital temperature value can be compared.

In step S141, the processor 140 may convert the current temperature value into a current digital temperature value. According to one embodiment, the first ADC circuit 141 and the second ADC circuit 142 may be configured as a Successive Approximation Register (SAR) ADC. The SAR ADC may be an ADC circuit that sequentially converts sampled analog values from MSB (Most Significant Bit) to LSB (Least Significant Bit) using multiple types of capacitors, and the number of digits converted to a digital value depends on the number of capacitors. can be decided.

According to one embodiment, the processor 140 may determine the number of digits of the digital value according to the set sensing sensitivity and convert the analog temperature value and analog current value into a digital temperature value and a digital current value. For example, when set to high sensitivity, the processor 140 may convert an analog temperature value and an analog current value into a digital temperature value and a digital current value with a digital value having the first digit, and when set to low sensitivity, The processor 140 may convert the analog temperature value and analog current value into a digital temperature value and a digital current value with a digital value having a second digit that is less than the first digit. When the first ADC circuit 141 and the second ADC circuit 142 are configured as SAR ADCs, the processor 140 can adjust the number of capacitors of the SAR ADC to be activated according to sensitivity in order to control the number of conversion digits according to sensitivity. .

In step S142, the processor 140 may calculate the difference between the target digital temperature value and the current digital temperature value. According to one embodiment, the processor 140 may determine the number of digits to calculate the difference between the target digital temperature value and the current digital temperature value according to the set sensing sensitivity. For example, when set to high sensitivity, the processor 140 may calculate the difference between the target digital temperature value and the current digital temperature value by the third digit from the MSB, and when set to low sensitivity, the processor 140 may calculate the difference between the target digital temperature value and the current digital temperature value by the third digit from the MSB. The difference between the target digital temperature value and the current digital temperature value can be calculated by the fourth digit, which is less than the number of digits.

Accordingly, when the electronic device according to an embodiment of the present disclosure is set to low sensitivity, the error range for the target temperature value can be set wide, and the operation and control of the cooling module 110 is not performed unnecessarily, thereby consuming power. can be reduced. In addition, the processor 140 can increase calculation speed and efficiency by performing error calculation only for the minimum number of digits. On the other hand, when the electronic device is set to high sensitivity, fine temperature control is possible, allowing it to operate as an ideal heating device.

In step S143, the processor 140 may determine the duty ratio and sign of the PWM pulse signal (PWM) corresponding to the difference and determine the level of the fan control signal (FCS). Since the method of determining the duty ratio and sign of the PWM pulse signal (PWM) and the level of the fan control signal (FCS) is described in detail in FIG. 4, detailed description will be omitted.

As above, exemplary embodiments have been disclosed in the drawings and specification. Although embodiments have been described in this specification using specific terms, this is only used for the purpose of explaining the technical idea of the present disclosure and is not used to limit the meaning or scope of the present disclosure as set forth in the claims. . Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present disclosure should be determined by the technical spirit of the attached patent claims.

Claims (8)

In an electronic device that controls the temperature of a heating device,
a cooling module disposed adjacent to the heating device and controlling the temperature of the heating device based on a current value of a received control current;
a temperature sensor that senses a temperature value from at least one of the cooling module and the heating device;
a memory that stores the current value of the control current transmitted to the cooling module and the amount of change in the temperature value received from the temperature sensor according to the amount of change in the current value;
a processor that receives the temperature value from the temperature sensor and outputs a PWM pulse signal and a fan control signal based on a change in temperature value according to a change in current value stored in the memory; and
A controller that outputs the control current to the cooling module based on the PWM pulse signal and the fan control signal.
Electronic devices containing. According to paragraph 1,
The processor,
a first ADC circuit that converts the temperature value received as an analog value into a digital temperature value; and
A second ADC circuit that converts the current value of the control current received as an analog value into a digital current value
An electronic device comprising: According to paragraph 2,
The processor,
An electronic device characterized in that the duty ratio and sign of the PWM pulse signal are adjusted based on the difference between the digital temperature value and the target digital temperature value. According to paragraph 3,
An electronic device, wherein the sign of the PWM pulse signal when the digital temperature value is higher than the target digital temperature value and the sign of the PWM pulse signal when the digital temperature value is lower than the target digital temperature value are opposite to each other. According to paragraph 1,
The processor,
An electronic device characterized in that it receives feedback from the temperature value and the current value of the control current and updates the amount of change in the temperature value according to the amount of change in the current value stored in the memory. According to paragraph 1,
The controller is,
An electronic device characterized in that the current value of the control current is increased and output in response to an increase in the duty ratio of the PWM pulse signal and the level of the fan control signal. According to clause 6,
The control current is,
It consists of Peltier control current and cooling fan control current,
The controller is,
a Peltier controller outputting a Peltier control current of a current value determined based on the PWM pulse signal to a Peltier module included in the cooling module; and
A fan controller that outputs a cooling fan control current of a current value determined based on the fan control signal to the cooling fan included in the cooling module.
An electronic device comprising: In clause 7,
The controller is,
A shunt resistance module disposed between the Peltier controller and the Peltier module to measure the current value of the Peltier control current.
An electronic device comprising: