JP5151963B2 - Cooling device for heating element storage device and heating element storage device using the same - Google Patents

Description

  The present invention relates to a heating element storage device.

  For example, as a heating element storage device using a cooling device for a heating element storage device, there is a base station of a mobile phone, and a plurality of communication devices in which a current of several tens of amperes or more flows are provided inside this base station, and the generated heat is generated. It was configured to be cooled by a fan.

In this heating element storage device, the external power source is converted into a DC power source, and the communication device and the fan are driven by the voltage (see Patent Document 1 for a similar prior document).
JP 2000-161875 A

  In the above-described conventional heating element storage device, the control board for controlling the fan that cools the inside is different in the system voltage of the DC power source generated from the external power source according to the type of communication device installed in the base station of the mobile phone Were prepared according to the voltage.

  Further, in such a heating element storage device, as described above, in the communication device provided inside, the current flowing over several tens of amperes varies depending on the communication volume of the mobile phone, and this current variation causes the base station to Fluctuates in the voltage of the DC power supply of the communication device and the cooling device for the heating element storage device supplied to the DC and the ripple voltage superimposed on the DC voltage, or the communication device processes high frequency signals of several GHz such as 1 GHz and 2.5 GHz Due to the electrical noise of the high-frequency component that inevitably occurs during the operation, the cooling device for the heating element storage device malfunctions due to the electrical noise such as the induced voltage of the high-frequency component generated in the power supply line of the cooling device for the heating element storage device. However, the continuity of the cooling operation is required so that the cooling performance does not deteriorate.

  In addition, when a base station is installed, it is also required that an operator at the time of construction knows that the DC voltage system of the corresponding base station has been correctly recognized.

  When manufacturing a cooling device to be installed in such a heating element storage device, the cost can be greatly reduced by sharing the control board so as to be compatible with a plurality of DC voltages.

  Further, by providing a circuit with resistance to electrical noise, a continuous cooling operation can be provided.

  Further, by notifying the determination result of the system voltage of the corresponding DC power supply, an operator at the time of construction or the like can recognize whether the system voltage of the DC power supply is correctly determined.

  Therefore, the present invention significantly reduces the cost, maintains continuous cooling performance by applying electrical noise resistance, and notifies the determination result of the system voltage of the DC power supply to notify the determination result of the system voltage of the DC power supply. It is an object of the present invention to provide a cooling device for a heating element storage device that can recognize the above.

  In order to achieve this object, the present invention provides a main body case having a first intake port and a first discharge port for a first environment, and a second intake port and a second discharge port for a second environment, and the main body case. Heat exchange is performed between the first environment air and the second environment air blow fan provided in the interior of the main body case and the first environment air and the second environment air. A heat exchanger and a control device that controls the first and second blower fans are provided, and the control device is one of a plurality of system voltages of the power supply voltage supplied from the heating element storage device. The system voltage is detected, the first and second blower fans are controlled according to the first system voltage, and the second system voltage, which is the other of the plurality of system voltages, is detected. The first and second blower fans are controlled according to the , Thereby, it can comprise a control device capable of detecting a plurality of DC voltage value with a simple configuration, by sharing the control device can be made to accommodate a plurality of DC voltages.

  Further, the first system voltage determination value for determining the first system voltage and the second system voltage determination value for determining the second system voltage are provided with hysteresis to determine a plurality of system voltages. By providing a circuit with resistance to electrical noise superimposed on the power supply, a continuous cooling operation can be provided.

  In addition, a first system voltage determination means is provided for determining the first system voltage by once detecting the first system voltage determination value and determining the first system voltage determination value again after a preset time has elapsed. By providing the second system voltage determination means for detecting the second system voltage once by detecting the second system voltage determination value and determining the second system voltage determination value again after a preset time has elapsed. The system is characterized by determining a plurality of system voltages in a stable state of the power supply voltage, and is continued by providing a circuit with resistance to electrical noise superimposed or induced on the DC power supply. Cooling operation can be provided.

  Further, as a means for detecting the first system voltage, a first comparator comprising a first comparator for comparing a power supply voltage with a first system voltage determination value which is a reference voltage generated from the comparator stabilized power supply generated from the power supply voltage. 1 system voltage comparison judgment means is provided, and as a means for detecting the second system voltage, the second comparison for comparing the power supply voltage and the second system voltage judgment value which becomes the reference voltage made from the stabilized power supply for the comparator A second system voltage comparison / determination unit comprising a voltage detector and determining a plurality of system voltages. A circuit having resistance to electrical noise superimposed on or induced by a DC power source is provided. By providing, a continuous cooling operation can be provided.

  Further, as means for detecting the first system voltage, a first lower limit voltage comparison for comparing the power supply voltage with a first system voltage lower limit determination value that is a reference voltage generated from the stabilized power supply for the comparator generated from the power supply voltage. A first system voltage comparison / determination unit comprising a first upper limit voltage comparator for comparing a power source voltage and a first system voltage upper limit determination value serving as a reference voltage generated from the stabilized power supply for the comparator; As a means for detecting a second system voltage, a second lower limit voltage comparator for comparing a power supply voltage with a second system voltage lower limit determination value that is a reference voltage created from the comparator stabilized power supply, and a power supply voltage A second system voltage comparison / determination unit comprising a second upper limit voltage comparator for comparing the second system voltage upper limit determination value, which is a reference voltage generated from the stabilized power supply for the comparator, is provided to determine a plurality of system voltages. To be characterized by Shall in, to provide a circuit which gave superimposed or induced resistance of electrical noise to the DC power source, it is possible to provide a continuous cooling operation.

  In addition, a first insulation element is provided between the first system voltage detection circuit that detects the first system voltage and the determination circuit that determines the first system voltage determination value, and the second system detects the second system voltage. A second insulating element is provided between the voltage detection circuit and the determination circuit for determining a second system voltage determination value, and a plurality of system voltages are determined, and the voltage is superimposed on a DC power source or By providing a circuit that is resistant to induced electrical noise, a continuous cooling operation can be provided.

  In addition, a notification means for clearly indicating that the power supply voltage is determined to be the first power supply system voltage or the second power supply system voltage is provided, and the system voltage of the DC power supply of the installed base station is notified. By doing so, the operator at the time of construction or the like can recognize whether the system voltage of the DC power supply is correctly judged.

  As described above, the present invention is provided in the main body case having the first intake port and the first discharge port for the first environment and the second intake port and the second discharge port for the second environment. A first air fan for the first environment and a second air fan for the second environment, and a heat exchanger for exchanging heat between the air in the first environment and the air in the second environment in the main body case; And a control device that controls the first and second blower fans, and the control device detects a first system voltage that is one of a plurality of system voltages of the power supply voltage supplied from the heating element storage device. Then, the first and second blower fans according to the first system voltage are controlled, and the second system voltage that is the other of the plurality of system voltages is detected, and the second system voltage is detected according to the second system voltage. This is characterized by controlling the first and second blower fans. Can comprise a control device capable of detecting a plurality of DC voltage value at Do configuration, by sharing the control apparatus can cope with a plurality of DC voltages.

  Further, the first system voltage determination value for determining the first system voltage and the second system voltage determination value for determining the second system voltage are provided with hysteresis to determine a plurality of system voltages. A continuous cooling operation can be provided by providing a circuit that is resistant to electrical noise superimposed or induced on the power supply.

  In addition, a first system voltage determination means is provided for determining the first system voltage by once detecting the first system voltage determination value and determining the first system voltage determination value again after a preset time has elapsed. By providing the second system voltage determination means for detecting the second system voltage once by detecting the second system voltage determination value and determining the second system voltage determination value again after a preset time has elapsed. The system is characterized by determining a plurality of system voltages in a stable state of the power supply voltage, and is continued by providing a circuit with resistance to electrical noise superimposed or induced on the DC power supply. Cooling operation can be provided.

  Further, as a means for detecting the first system voltage, a first comparator comprising a first comparator for comparing a power supply voltage with a first system voltage determination value which is a reference voltage generated from the comparator stabilized power supply generated from the power supply voltage. 1 system voltage comparison judgment means is provided, and as a means for detecting the second system voltage, the second comparison for comparing the power supply voltage and the second system voltage judgment value which becomes the reference voltage made from the stabilized power supply for the comparator A second system voltage comparison / determination unit comprising a voltage detector and determining a plurality of system voltages. A circuit having resistance to electrical noise superimposed on or induced by a DC power source is provided. By providing, a continuous cooling operation can be provided.

  Further, as means for detecting the first system voltage, a first lower limit voltage comparison for comparing the power supply voltage with a first system voltage lower limit determination value that is a reference voltage generated from the stabilized power supply for the comparator generated from the power supply voltage. A first system voltage comparison / determination unit comprising a first upper limit voltage comparator for comparing a power source voltage and a first system voltage upper limit determination value serving as a reference voltage generated from the stabilized power supply for the comparator; As a means for detecting a second system voltage, a second lower limit voltage comparator for comparing a power supply voltage with a second system voltage lower limit determination value that is a reference voltage created from the comparator stabilized power supply, and a power supply voltage A second system voltage comparison / determination unit comprising a second upper limit voltage comparator for comparing the second system voltage upper limit determination value, which is a reference voltage generated from the stabilized power supply for the comparator, is provided to determine a plurality of system voltages. To be characterized by Shall in, to provide a circuit which gave superimposed or induced resistance of electrical noise to the DC power source, it is possible to provide a continuous cooling operation.

  In addition, a first insulation element is provided between the first system voltage detection circuit that detects the first system voltage and the determination circuit that determines the first system voltage determination value, and the second system detects the second system voltage. A second insulating element is provided between the voltage detection circuit and the determination circuit for determining a second system voltage determination value, and a plurality of system voltages are determined, and the voltage is superimposed on a DC power source or By providing a circuit that is resistant to induced electrical noise, a continuous cooling operation can be provided.

  In addition, a notification means for clearly indicating that the power supply voltage is determined to be the first power supply system voltage or the second power supply system voltage is provided, and the system voltage of the DC power supply of the installed base station is notified. By doing so, the operator at the time of construction or the like can recognize whether the system voltage of the DC power supply is correctly judged.

  According to a first aspect of the present invention, there is provided a main body case having a first intake port and a first discharge port for the first environment and a second intake port and a second discharge port for the second environment, and the inside of the main body case. Heat for exchanging heat between the air in the first environment and the air in the second environment in the main body case, and the first air fan in the first environment and the second air fan in the second environment provided in the main body case. A first system that includes an exchanger and a control device that controls the first and second blower fans, and the control device is one of a plurality of system voltages of a power supply voltage supplied from the heating element storage device; The voltage is detected to control the first and second blower fans according to the first system voltage, and the second system voltage that is the other of the plurality of system voltages is detected, and the second system voltage is detected. The first and second blower fans are controlled accordingly, and the control device It has the effect of causes an operation corresponding to the blower fan while monitoring the system voltage of the DC power source to determine the first system voltage and a second system voltage to each of the system voltage.

  According to a second aspect of the present invention, a plurality of system voltages are determined by providing hysteresis to the first system voltage determination value for determining the first system voltage and the second system voltage determination value for determining the second system voltage. Since the determination value is provided with hysteresis, the system voltage can be determined without being confused by electrical noise superimposed on or induced by the DC power supply.

  According to a third aspect of the present invention, the first system voltage determination value is detected once, and the first system voltage determination value is determined again by determining the first system voltage determination value after a preset time has elapsed. A second system voltage is provided for determining a second system voltage by providing a system voltage determination means, and once detecting a second system voltage determination value and determining a second voltage determination value again after a preset time has elapsed. By providing voltage judgment means, it is characterized in that multiple system voltages are judged in a stable state of the power supply voltage. Over time, it is superimposed on the DC power supply in a stable state of the DC power supply voltage. The system voltage can be determined without being confused by the generated or induced electrical noise.

  According to a fourth aspect of the present invention, as a means for detecting the first system voltage, the power supply voltage is compared with the first system voltage determination value that is a reference voltage generated from the comparator stabilized power supply generated from the power supply voltage. First system voltage comparison / determination means comprising a first comparator is provided, and second system voltage determination as a means for detecting a second system voltage is a power supply voltage and a reference voltage created from the stabilized power supply for the comparator. A second system voltage comparison / determination unit comprising a second comparator for comparing the values is provided, and a plurality of system voltages are determined. Electricity superimposed or induced on a DC power source It has the effect that it is possible to determine the system voltage of the DC power supply with high accuracy without being confused by noise.

  According to a fifth aspect of the present invention, as means for detecting the first system voltage, a first system voltage lower limit determination value which is a reference voltage created from a power supply voltage and a stabilized power supply for a comparator generated from the power supply voltage; A first system comprising a first lower limit voltage comparator for comparing the power supply voltage and a first system voltage upper limit determination value for comparing a power supply voltage and a first system voltage upper limit determination value serving as a reference voltage generated from the stabilized power supply for the comparator. A voltage comparison / determination unit is provided, and as a unit for detecting the second system voltage, a second lower limit for comparing a power supply voltage with a second system voltage lower limit determination value serving as a reference voltage generated from the comparator stabilized power supply. A second system voltage comparison / determination unit comprising a voltage comparator and a second upper limit voltage comparator for comparing a power source voltage and a second system voltage upper limit determination value serving as a reference voltage generated from the stabilized power supply for the comparator; Multiple system voltages The system voltage can be determined without being confused by the electrical noise superimposed or induced on the DC power supply by providing a range for each system voltage determination value. It has the action.

  According to a sixth aspect of the present invention, a first insulating element is provided between the first system voltage detection circuit that detects the first system voltage and the determination circuit that determines the first system voltage determination value, and the second A second insulation element is provided between a second system voltage detection circuit for detecting a system voltage and the determination circuit for determining a second system voltage determination value, and a plurality of system voltages are determined. Yes, by providing a detection circuit and a detection circuit that directly monitors the DC power supply, the system voltage can be determined with resistance to electrical noise superimposed on or induced by the DC power supply. .

  The invention described in claim 7 is characterized in that a notification means is provided for clearly indicating that the power supply voltage is determined to be the first power supply system voltage or the second power supply system voltage. Since the determination result of the system voltage of the DC power supply of the station can be notified, the operator can recognize whether the system voltage of the DC power supply is correctly determined or not during construction.

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

(Embodiment 1)
In FIG. 1, a mobile phone base station 3 is provided on a roof 2 of a building 1. A mobile phone base station 3 includes a box-shaped cabinet 4, a plurality of communication devices 5 provided in the cabinet 4, and a heating device storage device cooling device 6 provided at the front opening of the cabinet 4 so as to be opened and closed like a door. It is comprised by.

  As shown in FIG. 2, the heating element storage device cooling device 6 includes a first intake port 7 and a first discharge port 8 for the outside air (first environment) and a second one for the inside of the cabinet 4 (second environment). A main body case 11 having an intake port 9 and a second discharge port 10, a first blower fan 12 for outside air (first environment) and an interior of the cabinet 4 (second environment) provided in the main body case 11. A second blower fan 13 and a heat exchanger 14 for exchanging heat between the air in the outside air (first environment) and the air in the cabinet 4 (second environment) in the main body case 11 are provided.

  The cooling device 6 for a heating element storage device includes a control device 15 that controls the first blower fan 12 and the second blower fan 13.

  As shown in FIG. 3, the first blower fan 12 and the second blower fan 13 as blower fans are connected to the control device 15, and the control device 15 is supplied to the cabinet 4 together with the communication device 5. The external power supply 16 is connected to a converted DC power supply 17.

  And the control apparatus 15 is comprised from the inverter 18 which operates the 1st ventilation fan 12 and the 2nd ventilation fan 13 separately, and the main board | substrate 19 which controls these inverters 18. FIG.

  As shown in FIG. 4, the main board 19 includes an operation instruction unit 20 that instructs the inverter 18 to operate, and a voltage monitoring unit 21 that operates the operation instruction unit 20 by monitoring the DC voltage V <b> 1 of the DC power supply 17. Is done.

  Then, as shown in the figure, the voltage monitoring means 21 detects the first system voltage as the DC voltage V1 of the DC power supply 17, and serves as a threshold for operating the first blower fan 12 and the second blower fan 13. The first detection circuit 23 as a detection circuit having the first system voltage determination value 22 and the second system voltage as a threshold for detecting the second system voltage and operating the first blower fan 12 and the second blower fan 13. A detection circuit having a determination value 24 is connected to the second detection circuit 25.

  The voltage monitoring means 21 is responsive to the first timer 26 that operates in conjunction with the first detection circuit 23 that operates in response to the first system voltage determination value 22 and the second system voltage determination value 24. A second timer 27 that operates in conjunction with the operated second detection circuit 25, and is connected to a DC voltage V1 supplied via the voltage determination means 28, that is, a system voltage determination means 29 that determines the system voltage In response to the determination, the apparatus has software switching means 30 for issuing an instruction to the operation instruction means 20.

  Further, as shown in FIG. 5, the first detection circuit 23 and the second detection circuit 25 are respectively connected to shunt regulators 31 and 32 for dividing and inputting the DC power supply 17 by two resistors and to the outputs thereof. The photocouplers 33 and 34 as the insulating elements and the second insulating elements are configured to transmit “Hi” and “Lo” signals to the voltage monitoring means 21.

  That is, the first detection circuit 23 sets the voltage dividing ratio of the resistor so that the threshold value 2.5 V of the shunt regulator 31 is exceeded when the first system voltage determination value 22 is applied to the two resistors. When the threshold value is exceeded, the output of the shunt regulator 31 becomes “Lo”, and the light emitting diode on the input side of the photocoupler 33 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal. Similarly, the second detection circuit 25 sets the resistor voltage dividing ratio so that the threshold value 2.5 V of the shunt regulator 32 is exceeded when the second system voltage determination value 24 is applied to the two resistors. When the threshold value is exceeded, the output of the shunt regulator 32 becomes “Lo”, and the light emitting diode on the input side of the photocoupler 34 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal.

  In general, as the voltage of the DC power supply 17, 24V and 48V are used as system voltages. In the present embodiment, one of the first system voltages is 24V and the other is the second system voltage of 48V. The first system voltage determination value 22 is 17V, and the second system voltage determination value 24 is 37V.

  In the above configuration, as shown in FIG. 6 (a), when the DC voltage V1 rises by turning on the DC power supply 17, the output of the first detection circuit 23 exceeds 17V of the first system voltage determination value 22, and “Hi ”To“ Lo ”. Although it continues to rise, for example, when the DC voltage V1 once decreases due to load fluctuation due to the operation of each communication device when the power is turned on and falls below 17V of the first system voltage judgment value 22, it returns from "Lo" to "Hi" When the DC voltage V1 rises again and exceeds 17V of the first system voltage determination value 22, it changes again from "Hi" to "Lo". Thereafter, the first detection is performed unless it falls below 17V of the first system voltage determination value 22. The output of the circuit 23 maintains “Lo”. On the other hand, the output of the second detection circuit 25 maintains “Hi” until it exceeds 37V of the second system voltage determination value 24, and when it exceeds, it changes to “Lo”. Thereafter, when the DC voltage V1 falls below 37V of the second system voltage determination value 24, the output of the second detection circuit 25 becomes “Hi”, and when the DC voltage V1 rises again and exceeds 37V of the second system voltage determination value 24. From “Hi” to “Lo” again, the output of the second detection circuit 25 remains “Lo” unless the voltage falls below 37 V of the second system voltage determination value 24.

  Here, a detailed description of the change in the output of the first detection circuit 23 that occurs when the portion A shown in FIG. 6A, that is, the DC voltage V1 exceeds the first system voltage determination value 22, will be described. In this case, the current flowing over several tens of amperes fluctuates depending on the communication volume of the mobile phone, and the fluctuation of this current fluctuates to the voltage of the DC power supply V1 of the communication device 5 and the heating device storage device cooling device 6 supplied into the base station For the heating element storage device due to ripple voltage superimposed on the DC voltage or electrical noise of high frequency components inevitably generated when the communication device processes high frequency signals of several GHz such as 1 GHz and 2.5 GHz The DC voltage V1 pulsates due to electrical noise such as the induced voltage of the high-frequency component generated in the power supply line of the cooling device, as shown in the enlarged view of part A in FIG. 6B. Therefore, the output of the first detection circuit 23 frequently repeats “Hi” and “Lo” alternately exceeding or below the first system voltage determination value 22 in a short period. A logic change from “Lo” or “Lo” to “Hi” occurs. Therefore, as in the present embodiment, after the time T1 preset by the first timer 26 (here, 1 second), the output of the first detection circuit 23 is confirmed by the voltage determination means 28, and “Hi” is set. It is extremely effective to determine that the first system voltage determination value 22 is lower than the first system voltage determination value 22 if it is “Lo”. The change in the output of the first detection circuit 23 that occurs when the B portion shown in FIG. 6A, that is, the DC voltage V1 exceeds the first system voltage determination value 22, is similarly determined.

  Similarly, a phenomenon in which the DC voltage V1 pulsates as shown in FIG. 6 (c) also occurs in the C section exceeding the second system voltage determination value 24 and the D section below the second system voltage determination value 24. After the time T1 preset by the second timer 27 (here, 1 second), the output of the second detection circuit 25 is confirmed by the voltage determination means 28, and if it is “Hi”, the second system voltage determination value If “Lo” is less than 24, it is effective to determine that the second system voltage determination value 24 is exceeded.

  In the above state, when the determination of the output of the first detection circuit 23 is “Lo” and the determination of the output of the second detection circuit 25 is “Hi”, the DC power supply V1 is 24V of the first system voltage. The determination is made by the system voltage determination means 29. Further, when the determination of the output of the first detection circuit 23 is “Lo” and the determination of the output of the second detection circuit 25 is “Lo”, it is determined that the DC power supply V1 is 48V of the second system voltage. This is determined by means 29.

  Then, in response to 24V of the first system voltage or 48V of the second system voltage determined by the system voltage determining unit 29, the software switching unit 30 causes the software for driving the inverter 18 (not shown) to be set to the first system voltage. Switch to software corresponding to 24V or 48V of the second system voltage, and drive the first blower fan 12 and the second blower fan 13 optimally according to 24V of the first system voltage or 48V of the second system voltage. Do.

  As described above, in the present embodiment, as described above, when the output logic of the first detection circuit 23 and the second detection circuit 25 changes, the system voltage is set in a state where the DC voltage V1 is stable after a preset time has elapsed. Since it is possible to have a control device that detects a plurality of system voltages with a simple configuration to correctly judge, it is possible to share the control device with a plurality of system voltages, and the cooling device for the heating element storage device is greatly reduced in cost. Further, it is possible to provide an electrical circuit that is not easily affected by electrical noise such as a ripple voltage superimposed on the DC voltage V1 or an induced voltage of a generated high-frequency component by correctly determining the system voltage while the DC voltage V1 is stable. By making the circuit resistant to noise, it is possible to provide a continuous cooling operation of the cooling device 6 for the heating element storage device, and further, As it is possible to provide the combined circuits which gave resistance electrical noise by using a photocoupler.

  Since the system voltage corresponds to one of 24V and the other 48V as in the present embodiment, the allowable current value of the inverter 18 is ½ times that of the other. It may be difficult to share with -18. In such a case, since the control device 15 is composed of the inverter 18 and the main board 19 that controls the inverter 18, it is possible to share only the main board 19 and cope with a plurality of system voltages. Cost can be reduced. In this case, if the mounted inverter 18 is dedicated to the system voltage 24V, when the system voltage of the DC power source V1 is determined to be 48V, the software switching means 30 stops the operation of the inverter 18 and supplies power to the inverter 18. When the system voltage of the DC power source V1 is determined to be 24V when the installed inverter 18 is dedicated to the system voltage 48V, the software switching is performed. The operation of the inverter 18 may be stopped by the means 30 to prevent the inverter 18 from being destroyed.

(Embodiment 2)
The same components as those in the first embodiment are denoted by the same reference numerals for easy understanding, and the detailed description thereof is simplified.

  As shown in FIG. 7, the outputs of the first detection circuit 23 and the second detection circuit 25 are connected to the voltage monitoring means 21, and the voltage monitoring means 21 determines the supplied DC voltage V1, that is, the system voltage. It is connected to the voltage determination means 29 and has a software switching means 30 for issuing an instruction to the operation instruction means 27 according to the determination.

  Further, as shown in FIG. 8, the first detection circuit 23 and the second detection circuit 25 are divided into the first comparator 35 and the second comparator 36, respectively, which are input by dividing the DC power supply 17 with two resistors. The reference voltage, that is, the first system voltage judgment value 22 and the second system voltage judgment value 24 are generated by the DC / DC converter 37 connected to the DC power source 17 and used for the comparators of the first comparator 35 and the second comparator 36. The first comparator 35 and the second comparator 36 are divided by two resistors provided between a stabilized power source (here, +12 V) 37 and the outputs of the first comparator 35 and the second comparator 36. And the photocouplers 33 and 34 as the second insulating elements connected to the outputs of the first comparator 35 and the second comparator 36, and the signals "Hi" and "Lo" To voltage monitoring means 21 And it constitutes to Shin. Here, the reference voltage is provided between the outputs of the first comparator 35 and the second comparator 36 and the operating voltage (here, + 12V) using two resistors, and the first comparator 35 and In order to provide hysteresis for the reference voltage of the second comparator 36, in the present embodiment, for example, it will be described as 1V.

  That is, the first detection circuit 23 has a resistor that exceeds the reference voltage of the first comparator 35 when the first system voltage determination value 22 is applied to two resistors connected to the DC power supply 17. The output of the first comparator 35 becomes “Lo” when the threshold value is exceeded, and the light emitting diode on the input side of the photocoupler 33 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal. Similarly, the second detection circuit 25 has a resistor that exceeds the reference voltage of the second comparator 36 when the second system voltage determination value 24 is applied to two resistors connected to the DC power supply 17. The output of the second comparator 36 is “Lo” when the threshold value is exceeded, and the light emitting diode on the input side of the photocoupler 34 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal.

  In the above configuration, as shown in FIG. 9A, when the DC voltage V1 rises due to the DC power supply 17 being turned on, the output of the first detection circuit 23 exceeds 17V of the first system voltage determination value 22, and “Hi ”To“ Lo ”. The voltage continues to rise, but for example, when the communication voltage is changed due to the operation of each communication device when the power is turned on, the DC voltage V1 once decreases, and when the voltage drops below 16V obtained by reducing the hysteresis 1V to 17V of the first system voltage judgment value 22, “Lo ”To“ Hi ”, and when the DC voltage V1 rises again and exceeds 17V of the first system voltage determination value 22, it changes from“ Hi ”to“ Lo ”again. Thereafter, 17V of the first system voltage determination value 22 is changed to 17Hi. Unless it falls below, the output of the first detection circuit 23 maintains “Lo”. On the other hand, the output of the second detection circuit 25 maintains “Hi” until it exceeds 37V of the second system voltage determination value 24, and when it exceeds, it changes to “Lo”. Thereafter, when the DC voltage V1 falls below 36V obtained by subtracting the hysteresis 1V from 37V of the second system voltage determination value 24, the output of the second detection circuit 25 becomes "Hi", and the DC voltage V1 rises again to determine the second system voltage. When the value 24 exceeds 37V, the signal changes from “Hi” to “Lo” again, and thereafter, the output of the second detection circuit 25 maintains “Lo” unless the voltage falls below 37V of the second system voltage determination value 24.

  9A, that is, when the DC voltage V1 exceeds the first system voltage determination value 22, the change in the output of the first detection circuit 23 will be described in detail. As shown in the enlarged view of part A shown in b), the output of the first detection circuit 23 changes to “Hi” and “Lo” exceeding the first system voltage judgment value 22 of the pulsating DC voltage V1, but the first comparison Since the voltage of the first system voltage determination value 22 is not lower than 1 V due to the hysteresis of the voltage generator 35, the output of the first detection circuit 23 does not change. Similarly, in the enlarged view of part B shown in FIG. 9B, the output of the first detection circuit 23 starts from “Lo” when the hysteresis of the first comparator 35 is below the hysteresis 1V with respect to the first system voltage determination value 22. Although it changes to “Hi”, even if the pulsation of the DC voltage V1 does not exceed the first system voltage determination value 22, the output of the first detection circuit 23 does not change. Similarly, also in the enlarged parts of the C part and the D part shown in FIG. 9C, the logic of the output of the second detection circuit 25 that occurs when the DC voltage V1 exceeds the second system voltage determination value 24 is easily inverted. do not do.

  In the above state, when the determination of the output of the first detection circuit 23 is “Lo” and the determination of the output of the second detection circuit 25 is “Hi”, the DC power supply V1 is 24V of the first system voltage. The determination is made by the system voltage determination means 29. Further, when the determination of the output of the first detection circuit 23 is “Lo” and the determination of the output of the second detection circuit 25 is “Lo”, it is determined that the DC power supply V1 is 48V of the second system voltage. This is determined by means 29.

  Then, in response to 24V of the first system voltage or 48V of the second system voltage determined by the system voltage determining unit 29, the software switching unit 30 causes the software for driving the inverter 18 (not shown) to be set to the first system voltage. Switch to software corresponding to 24V or 48V of the second system voltage, and drive the first blower fan 12 and the second blower fan 13 optimally according to 24V of the first system voltage or 48V of the second system voltage. Do.

  As described above, in the present embodiment, as described above, the reference voltage of the first comparator 35 and the second comparator 36 used in the first detection circuit 23 and the second detection circuit 25 is superposed by providing hysteresis. Therefore, it is possible to provide a control device that detects a plurality of system voltages with a simple configuration that correctly determines the system voltage in the state of the DC voltage V1 in which the ripple voltage or the induced voltage of the generated high-frequency component is seen. It is possible to provide a cooling device for a heating element storage device that can be shared by a system voltage of a large amount, and the state of the direct current voltage V1 in which a superimposed ripple voltage or an induced voltage of a generated high frequency component is seen. By making the circuit resistant to electrical noise that is not easily affected by electrical noise that correctly determines the system voltage, the cooling for the heating element storage device is reduced. Can provide continuous cooling operation of the device 6, further, it is possible to provide the combined circuits which gave resistance electrical noise by using a photocoupler as an insulating element.

  Since the system voltage corresponds to one of 24V and the other 48V as in the present embodiment, the allowable current value of the inverter 18 is ½ times that of the other. It may be difficult to share with -18. In such a case, since the control device 15 is composed of the inverter 18 and the main board 19 that controls the inverter 18, it is possible to share only the main board 19 and cope with a plurality of system voltages. Cost can be reduced. In this case, if the mounted inverter 18 is dedicated to the system voltage 24V, when the system voltage of the DC power source V1 is determined to be 48V, the software switching means 30 stops the operation of the inverter 18 and supplies power to the inverter 18. When the system voltage of the DC power source V1 is determined to be 24V when the installed inverter 18 is dedicated to the system voltage 48V, the software switching is performed. The operation of the inverter 18 may be stopped by the means 30 to prevent the inverter 18 from being destroyed.

(Embodiment 3)
The same components as those in the first and second embodiments are denoted by the same reference numerals for easy understanding, and the detailed description thereof is simplified.

  As shown in FIG. 10, the voltage monitoring unit 21 detects the first system voltage as the DC voltage V <b> 1 of the DC power supply 17 and operates as a threshold for operating the first blower fan 12 and the second blower fan 13. The first detection circuit 23 as a detection circuit having a system voltage lower limit determination value 38, the second detection circuit 25 as a detection circuit having a first system voltage upper limit determination value 39, and a first air flow by detecting a second system voltage As a detection circuit having a second system voltage lower limit determination value 40 as a threshold for operating the fan 12 and the second blower fan 13, a third detection circuit 41 and a detection circuit having a second system voltage upper limit determination value 42 are fourth. Connected to the detection circuit 43.

  The voltage monitoring means 21 is connected to the supplied DC voltage V1, that is, the system voltage determining means 29 for determining the system voltage, and the software switching means 30 for giving an instruction to the operation instructing means 27 according to the determination. It is what has.

  In addition, as shown in FIG. 11, the first detection circuit 23, the second detection circuit 25, the third detection circuit 41, and the fourth detection circuit 43 are each input by dividing the DC power supply 17 with two resistors. The first lower limit voltage comparator 44, the first upper limit voltage comparator 45, the second lower limit voltage comparator 46, the second upper limit voltage comparator 47 and the reference voltage thereof, that is, the first system voltage lower limit determination value 38, the first system voltage upper limit The determination value 39, the second system voltage lower limit determination value 40, and the second system voltage upper limit determination value 42 are provided between the comparator stabilized power supply 37 (here + 12V) connected to the DC power supply 17 and the circuit ground. The voltage is divided by a resistor and input to the first lower limit voltage comparator 44, the first upper limit voltage comparator 45, the second lower limit voltage comparator 46, and the second upper limit voltage comparator 47, and the first lower limit voltage comparator 44 , 1st upper limit electric power Photo as first insulating element, second insulating element, third insulating element, fourth insulating element connected to outputs of comparator 45, second lower limit voltage comparator 46, and second upper limit voltage comparator 47 The couplers 33, 34, 48 and 49 are configured to transmit “Hi” and “Lo” signals to the voltage monitoring means 21.

  That is, the first detection circuit 23 exceeds the reference voltage of the first lower limit voltage comparator 44 when the first system voltage lower limit determination value 38 is applied to the two resistors connected to the DC power supply 17. The voltage dividing ratio of the resistor is set, and when the threshold value is exceeded, the output of the first lower limit voltage comparator 344 becomes “Lo”, and the light emitting diode on the input side of the photocoupler 33 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal. Similarly, the second detection circuit 25 exceeds the reference voltage of the first upper limit voltage comparator 45 when the first system voltage upper limit determination value 39 is applied to two resistors connected to the DC power supply 17. The voltage dividing ratio of the resistor is set, and when the threshold is exceeded, the output of the first upper limit voltage comparator 45 becomes “Lo”, and the light emitting diode on the input side of the photocoupler 34 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal. Similarly, the third detection circuit 41 exceeds the reference voltage of the second lower limit voltage comparator 46 when the second system voltage lower limit determination value 40 is applied to two resistors connected to the DC power supply 17. The voltage dividing ratio of the resistor is set, and when the threshold value is exceeded, the output of the second lower limit voltage comparator 46 becomes “Lo”, and the light emitting diode on the input side of the photocoupler 48 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal. Similarly, the fourth detection circuit 43 exceeds the reference voltage of the second upper limit voltage comparator 47 when the second system voltage upper limit determination value 42 is applied to two resistors connected to the DC power supply 17. The voltage dividing ratio of the resistor is set, and when the threshold value is exceeded, the output of the second upper limit voltage comparator 47 becomes “Lo”, and the light emitting diode on the input side of the photocoupler 49 is turned on. The voltage monitoring means 21 is configured to transmit a “Lo” signal.

  In general, as the voltage of the DC power supply 17, 24V and 48V are used as system voltages. In the present embodiment, one of the first system voltages is 24V and the other is the second system voltage of 48V. The first system voltage lower limit determination value 38 is 16V, the first system voltage upper limit determination value 39 is 17V, the second system voltage lower limit determination value 40 is 36V, and the second system voltage upper limit determination value 42 is 37V.

  In the above configuration, as shown in FIG. 12, when the DC voltage V1 rises due to the DC power supply 17 being turned on, the output of the first detection circuit 23 exceeds the first system voltage lower limit determination value 38 of 16V and starts from “Hi”. Turn to “Lo”. Further increasing, the output of the second detection circuit 25 exceeds 17V of the first system voltage upper limit determination value 39 and changes from “Hi” to “Lo”. The output continues to rise, but for example, when the DC voltage V1 is once decreased and falls below 17V of the first system voltage upper limit determination value 39 due to load fluctuation due to the operation of each communication device by turning on the power, the output of the second detection circuit 25 is When “Lo” returns to “Hi” and the DC voltage V1 continues to decrease and falls below 16V of the first system voltage lower limit determination value 38, the output of the first detection circuit 23 returns from “Lo” to “Hi”. When the DC voltage V1 rises again and exceeds the first system voltage lower limit determination value 38 of 16V, the output of the first detection circuit 23 changes from “Hi” to “Lo” again, and further increases, and the first system voltage upper limit When the determination value 39 exceeds 17V, the output of the second detection circuit 25 changes from “Hi” to “Lo” again. Thereafter, the output of the second detection circuit 25 is not lower than 17V of the first system voltage upper limit determination value 39. The output remains “Lo”. On the other hand, the output of the third detection circuit 41 maintains “Hi” until it exceeds 36 V of the second system voltage lower limit determination value 40, and when it exceeds, it changes to “Lo”. Further, when the DC voltage V1 continues to rise and exceeds the second system voltage upper limit determination value 42 of 37 V, the output of the fourth detection circuit 43 changes from “Hi” to “Lo”. Thereafter, when the DC voltage V1 decreases and falls below 37V of the second system voltage upper limit determination value 42, the output of the fourth detection circuit 43 becomes “Hi”, and further decreases, and the second system voltage lower limit determination value 40 of 36V. The output of the third detection circuit 41 becomes “Hi” below the threshold value. When the DC voltage V1 rises again and exceeds the second system voltage lower limit judgment value 40 of 36V, the output of the third detection circuit 41 changes from “Hi” to “Lo” again, and continues to rise to determine the second system voltage upper limit judgment. When the value 42 exceeds 37V, the output of the fourth detection circuit 43 changes from “Hi” to “Lo” again, and thereafter, the output of the fourth detection circuit 43 is output unless it falls below 37V of the second system voltage upper limit determination value 42. Maintains “Lo”.

  12A, that is, the first detection circuit 23 and the second detection circuit that occur when the DC voltage V1 exceeds the first system voltage lower limit determination value 38 and the first system voltage upper limit determination value 39. When the detailed description of the change in the output of 25 is added, since the DC voltage V1 pulsates as shown in the enlarged view of part A shown in FIG. 12B, the first system voltage lower limit determination value 38 in a short period. The output of the first detection circuit 23 and the second detection circuit frequently repeats “Hi” and “Lo” alternately, exceeding or below the first system voltage upper limit determination value 39. Further, when the changes in the outputs of the first detection circuit 23 and the second detection circuit 25 that occur when the DC voltage V1 falls below the first system voltage lower limit determination value 38 and the first system voltage upper limit determination value 39, Since the DC voltage V1 pulsates as shown in the enlarged view of part B shown in FIG. 12B, the first system voltage lower limit determination value 38 and the first system voltage upper limit determination value 39 are exceeded or decreased in a short period. Thus, the outputs of the first detection circuit 23 and the second detection circuit 25 frequently repeat “Hi” and “Lo” alternately. Similarly, looking at changes in the outputs of the third detection circuit 41 and the fourth detection circuit 43 that occur when the DC voltage V1 exceeds the second system voltage lower limit determination value 40 and the second system voltage upper limit determination value 42, Since the DC voltage V1 pulsates as shown in the enlarged view of part C shown in FIG. 12C, it exceeds or falls below the second system voltage lower limit determination value 40 and the second system voltage upper limit determination value 42 in a short period of time. Thus, the outputs of the third detection circuit 41 and the fourth detection circuit 43 frequently repeat “Hi” and “Lo” alternately. Further, when the change in the outputs of the third detection circuit 41 and the fourth detection circuit 43 that occurs when the DC voltage V1 falls below the second system voltage lower limit determination value 40 and the second system voltage upper limit determination value 42, Since the DC voltage V1 is pulsating as shown in the enlarged view of the D portion shown in FIG. 12C, the second system voltage lower limit determination value 40 and the second system voltage upper limit determination value 42 are exceeded or decreased in a short period. Thus, the outputs of the third detection circuit 41 and the fourth detection circuit 43 frequently repeat “Hi” and “Lo” alternately.

  Considering the change point where “Hi” and “Lo” are frequently repeated alternately due to the fluctuation of the power supply voltage V1, the DC voltage is output when the output of the second detection circuit 25 changes from “Hi” to “Lo”. The voltage monitoring means 21 makes the first determination that V1 is in the voltage range of 24V of the first system voltage, and the voltage is not changed unless the output of the first detection circuit 23 changes from “Lo” to “Hi”. The monitoring means 21 does not change this first determination. When the output of the fourth detection circuit 43 changes from “Hi” to “Lo”, the voltage monitoring means 21 makes a second determination that the DC voltage V1 is in the voltage range of 48V of the second system voltage. Thereafter, unless the output of the third detection circuit 41 changes from “Lo” to “Hi”, the voltage monitoring unit 21 does not change the second determination. On the other hand, when the output of the first detection circuit 23 changes from “Lo” to “Hi”, the voltage monitoring means 21 detects that the DC voltage V1 falls below the voltage range of 24V of the first system voltage. Thereafter, the voltage monitoring means 21 does not change the third determination unless the output of the second detection circuit 25 changes from “Hi” to “Lo”. When the output of the third detection circuit 41 changes from “Lo” to “Hi”, if the DC voltage V1 falls below the 48V voltage range of the second system voltage, the voltage monitoring means 21 makes a fourth determination. Thereafter, as long as the output of the fourth detection circuit 43 does not change from “Hi” to “Lo”, the voltage monitoring unit 21 does not change the fourth determination.

  In the above-described state, using the combination of the first determination, the second determination, the third determination, and the fourth determination, the system voltage determination unit 29 sets the system voltage of the power supply voltage DC voltage V1 as follows. Judgment. That is, at the time of the first determination that the DC voltage V1 is in the voltage range of 24V of the first system voltage, the second determination that the DC voltage V1 is in the voltage range of 48V of the second system voltage has occurred. In this case, the system voltage determining unit 29 determines that the system voltage of the DC voltage V1 is 48V of the second system voltage. Further, in the first determination that the DC voltage V1 is in the voltage range of 24V of the first system voltage, the fourth determination that the DC voltage V1 is lower than the voltage range of 48V of the second system voltage is performed. When it occurs, the system voltage determining means 29 determines that the system voltage of the DC voltage V1 is 24V of the first system voltage. If any other combination of the first determination, the second determination, the third determination, and the fourth determination occurs, the system voltage determination means 29 determines that the DC voltage V1 is an unexpected system voltage. To do.

  Then, in response to 24V of the first system voltage or 48V of the second system voltage determined by the system voltage determining unit 29, the software switching unit 30 causes the software for driving the inverter 18 (not shown) to be set to the first system voltage. Switch to software corresponding to 24V or 48V of the second system voltage, and drive the first blower fan 12 and the second blower fan 13 optimally according to 24V of the first system voltage or 48V of the second system voltage. Do.

  As described above, in the present embodiment, as described above, the first system voltage upper limit determination value 39, the first system voltage lower limit determination value 38, the second system voltage upper limit determination value 42, and the second system voltage lower limit due to the pulsation of the DC voltage V1. The outputs of the first detection circuit 23, the second detection circuit 25, the third detection circuit 41, and the fourth detection circuit 43 near the determination value 40 are in an unstable state in which “Hi” and “Lo” are repeated. The output voltage of DC is determined from the combination of change points at which the logic changes from “Hi” to “Lo” or from “Lo” to “Hi”, and the DC voltage is determined by combining these determinations. Since a control device that detects a plurality of system voltages can be provided with a simple configuration that correctly determines the system voltage even when V1 pulsates, the control device is shared by a plurality of system voltages. Therefore, it is possible to provide a cooling device for a heating element storage device that is significantly reduced in cost, and the output of each detection circuit near each system voltage judgment value repeats “Hi” and “Lo” due to the pulsation of the DC voltage V1. Although it becomes an unstable state, only the logical change from “Hi” to “Lo” or “Lo” to “Hi” of the output of each detection circuit is used as the determination of the voltage of the DC voltage V1, and these determinations are combined. Even in a state where the DC voltage V1 pulsates, the system voltage is correctly judged, so that the resistance of the electrical noise which is not easily affected by the electrical noise such as the ripple voltage superimposed on the DC voltage V1 or the induced voltage of the generated high frequency component is obtained. By providing the circuit, it is possible to provide a continuous cooling operation of the cooling device 6 for the heating element storage device, and further, a photocoupler is used as an insulating element. It can be provided to suit a circuit which gave resistance electrical noise by the use.

  Since the system voltage corresponds to one of 24V and the other 48V as in the present embodiment, the allowable current value of the inverter 18 is ½ times that of the other. It may be difficult to share with -18. In such a case, since the control device 15 is composed of the inverter 18 and the main board 19 that controls the inverter 18, it is possible to share only the main board 19 and cope with a plurality of system voltages. Cost can be reduced. In this case, if the mounted inverter 18 is dedicated to the system voltage 24V, when the system voltage of the DC power source V1 is determined to be 48V, the software switching means 30 stops the operation of the inverter 18 and supplies power to the inverter 18. When the system voltage of the DC power source V1 is determined to be 24V when the installed inverter 18 is dedicated to the system voltage 48V, the software switching is performed. The operation of the inverter 18 may be stopped by the means 30 to prevent the inverter 18 from being destroyed.

(Embodiment 4)
In order to facilitate understanding, the same components as those in the first embodiment, the second embodiment, and the third embodiment are denoted by the same reference numerals, and the detailed description thereof is simplified.

  As shown in FIG. 13, in addition to the configuration of FIG. 4, the control device 15 includes an LED 50 as a notification means.

  In the above configuration, the LED 50 blinks or lights up the result based on the determination of the system voltage of the DC voltage V1 of the system voltage determination means 29. That is, when it is determined that the first system voltage is 24V, the LED 50 is blinked, and when it is determined that the second system voltage is 48V, the LED 50 is turned on.

  As described above, in the present embodiment, as described above, the LED 50 blinks or lights based on the determination of the system voltage of the system voltage determination means 29, and the system voltage of the DC power supply of the installed base station is notified by visually checking the LED 50. By doing so, it is possible to provide a cooling device for a heating element storage device that can be recognized by an operator at the time of construction or the like whether the system voltage of the DC power supply is correctly determined.

  As described above, according to the present invention, the first voltage detection value for detecting the first DC voltage and operating the first and second blower fans and the second voltage detection for stopping the first and second blower fans are provided. A third voltage detection value for detecting the value and the second DC voltage and operating the first and second blower fans, and a fourth voltage detection value for stopping the first and second blower fans, A control device that controls the operation stop of the first and second blower fans while monitoring the DC voltage supplied from the heating element storage device is provided, and a single control device can cope with a plurality of power supply voltages. It is possible to provide a cooling device for a heating element storage device that can reduce the cost. Therefore, for example, it is extremely useful as a cooling facility for a base station of a communication device or other outdoor equipment.

The perspective view which shows the example of installation of one Embodiment of this invention Sectional view of the cooling device for the heating element storage device Configuration diagram of cooling device for same heating element storage device Configuration diagram of the control device of Embodiment 1 Configuration diagram of the control device detection circuit of the first embodiment The figure explaining operation | movement of the detection circuit of Embodiment 1 ((a) The figure explaining operation | movement when the DC voltage V1 rises by turning on DC power supply, (b) The enlarged view of A part and B part, (C) Enlarged view of part C and part D) Configuration diagram of control device of embodiment 2 Configuration diagram of control device detection circuit of embodiment 2 The figure explaining operation | movement of the detection circuit of Embodiment 2 ((a) The figure explaining operation | movement when the DC voltage V1 rises by turning on DC power supply, (b) The enlarged view of A part and B part, ( c) Enlarged view of part C and part D) Configuration diagram of control device of embodiment 3 Configuration diagram of control device detection circuit of embodiment 3 The figure explaining operation | movement of the detection circuit of Embodiment 3 ((a) The figure explaining operation | movement when DC voltage V1 rises by turning on DC power supply, (b) The enlarged view of A part and B part, ( c) Enlarged view of part C and part D) Configuration diagram of control device of embodiment 4

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Rooftop 3 Mobile phone base station 4 Cabinet 5 Communication device 6 Heating device storage device cooling device 7 First intake port 8 First discharge port 9 Second intake port 10 Second discharge port 11 Main body case 12 First Blower fan 13 Second blower fan 14 Heat exchanger 15 Controller 21 Voltage monitoring means 22 First system voltage judgment value 23 First detection circuit 24 Second system voltage judgment value 25 Second detection circuit 29 System voltage judgment means 38 1 system voltage lower limit judgment value 39 1st system voltage upper limit judgment value 40 2nd system voltage lower limit judgment value 41 3rd detection circuit 42 2nd system voltage upper limit judgment value 43 4th detection circuit 50 LED

Claims (7)

A main body case having a first intake port and a first discharge port for the first environment, and a second intake port and a second discharge port for the second environment, and a first environment first case provided in the main body case A second air fan for the second environment, a heat exchanger for exchanging heat between the air in the first environment and the air in the second environment in the main body case, and the first and second air A control device that controls the blower fan is provided, and the control device detects a first system voltage that is one of a plurality of system voltages of the power supply voltage supplied from the heating element storage device, and converts the first system voltage into the first system voltage. Accordingly, the first and second blower fans are controlled, and the second system voltage, which is the other of the plurality of system voltages, is detected, and the first and second blower fans are controlled according to the second system voltage. A cooling device for a heating element storage device, characterized by being controlled. The heat generation according to claim 1, wherein a plurality of system voltages are determined by providing hysteresis to a first system voltage determination value for determining the first system voltage and a second system voltage determination value for determining the second system voltage. Cooling device for body storage device. A first system voltage determination unit is provided for determining the first system voltage by detecting the first system voltage determination value and determining the first system voltage determination value again after a preset time has elapsed. By providing a second system voltage determination means for determining the second system voltage by detecting the second system voltage determination value and determining the second system voltage determination value again after a preset time has elapsed, The cooling device for a heating element storage device according to claim 1, wherein a plurality of system voltages are determined in a stable voltage state. As a means for detecting a first system voltage, a first system comprising a first comparator for comparing a power supply voltage with a first system voltage judgment value which is a reference voltage generated from the stabilized power supply for the comparator generated from the power supply voltage. A voltage comparison / determination unit; and a second comparator for comparing a power supply voltage and a second system voltage determination value serving as a reference voltage created from the stabilized power supply for the comparator as means for detecting the second system voltage. The cooling device for a heating element storage device according to any one of claims 1 to 3, wherein a second system voltage comparison / determination unit is provided to determine a plurality of system voltages. As a means for detecting the first system voltage, a first lower limit voltage comparator for comparing the power supply voltage with a first system voltage lower limit determination value which is a reference voltage generated from the comparator stabilized power supply generated from the power supply voltage; A first system voltage comparison / determination unit comprising a first upper limit voltage comparator for comparing a power source voltage with a first system voltage upper limit determination value serving as a reference voltage created from the stabilized power supply for the comparator; As a means for detecting a two-system voltage, a second lower-limit voltage comparator for comparing a power-supply voltage with a second-system voltage lower-limit determination value serving as a reference voltage generated from the stabilized power supply for the comparator, the power-supply voltage and the comparison Determining a plurality of system voltages by providing second system voltage comparison / determination means comprising a second upper limit voltage comparator for comparing with a second system voltage upper limit determination value serving as a reference voltage generated from the stabilized power supply for the appliance. The feature Heating medium storage device for cooling device according to any one of claim 1 to 3. A first insulation element is provided between the first system voltage detection circuit for detecting the first system voltage and the determination circuit for determining the first system voltage determination value, and the second system voltage detection for detecting the second system voltage. 5. The heat generation according to claim 1, wherein a plurality of system voltages are determined by providing a second insulating element between the circuit and the determination circuit for determining a second system voltage determination value. Cooling device for body storage device. The cooling for a heating element storage device according to any one of claims 1 to 6, further comprising a notification means for clearly indicating that the power supply voltage is determined to be the first power supply system voltage or the second power supply system voltage. apparatus.

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