JP2008218136A - Dehumidifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for notifying a user of switch trouble from ON/OFFs of a plurality of switches supplying power to a heater used in a home-use dehumidifier and currents flowing in the heater. <P>SOLUTION: The dehumidifier is provided with a control part 5 for judging trouble such as welding of a switch, and activating an abnormality alarm display means 4 in case of such judgment, by detecting with a current detecting sensor 3 whether a current flows in the heater 1 each time a plurality of switches 2A, 2B are switched ON in turn. The switch 2A and the switch 2B are put ON/OFF in turn. By confirming a current of the heater 1 each time the switch 2A and the switch 2B are put ON/OFF, such trouble as welding of the switches are detected to stop power supply to the heater 1, and people are notified of abnormalities by the abnormality alarm display means 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is, for example, a device that detects a switch failure from ON / OFF of a plurality of switches that supply electric power to a heater used in a home dehumidifier and the like and a current flowing through the heater and notifies the user of the failure. About.

  In recent years, the term “life end” has been commonly used, and it is an important factor that the product can be used safely until the product lifetime when the product cannot be used. However, if the switch that supplies power to the heater fails, such as welding, the heater temperature is raised to a temperature at which a safety device such as a thermal fuse operates, and the thermal fuse is blown to supply power to the heater. Stop.

  However, a switch control method has been developed that combines a function to stop power supply to the heater with a single switch when a heater temperature rise is detected, and a safety device such as a thermal fuse. Use multiple switches to turn on / off and detect whether or not current flows to the heater to detect failures such as switch welding and stop power supply to the heater without raising the heater temperature A dehumidifier having a mechanism to do this has not been invented (see, for example, Patent Document 1).

Hereinafter, the dehumidifier will be described. The structure includes a thermistor as a first-stage protection device and a thermal fuse as a second-stage protection device. The thermistor, which is the first-stage protection device, is a protection device that turns off the heater switch when the heater temperature rises. The thermal fuse that is the second-stage protective device is a protective device that stops the power supply to the heater by fusing the thermal fuse when the temperature of the heater further rises due to a failure such as switch welding.
JP 2003-240264 A

  In such a conventional method, when a switch for supplying power to the heater has a failure such as welding, even if the temperature rise of the heater can be detected, there is only one switch and the power supply to the heater cannot be stopped. The heater will rise to a temperature where the thermal fuse blows. In this case, even though the temperature setting of the temperature fuse, which is a safety device, is set to a temperature that is not unsafe, the temperature fuse will be blown, so only the switch that supplies power to the heater is replaced. Instead, it is necessary to replace other parts such as a thermal fuse installed near the heater.

  The present invention solves such a conventional problem, using a plurality of switches for supplying power to the heater, operating these switches with a time difference, and confirming the current flowing through the heater each time. This makes it possible to detect the welding of the switch. In addition, by stopping the power supply to the heater with the remaining normal switches, it is possible to notify the user of the abnormality without raising the temperature of the heater to the temperature at which the thermal fuse that is the safety device blows, and repair The goal is to provide a dehumidifier that does not require extra parts to be changed.

  In order to achieve the above object, the present invention provides a plurality of switches for supplying power to the heater, a current detection sensor for detecting a current value flowing through the heater, and an abnormality notification display for notifying that the plurality of switches are abnormal. And determining whether or not there is an abnormality in the plurality of switches from the value of the current flowing in the heater detected by the current detection sensor and the ON / OFF of the plurality of switches, And a control unit that operates the abnormality notification display means.

  By this means, each time a plurality of switches are turned ON in order, it is confirmed whether or not current flows through the heater, a failure such as switch welding is detected, and the temperature of the heater is reduced to a temperature at which a temperature fuse as a safety device is blown. A dehumidifier capable of stopping the power supply to the heater without increasing the temperature is obtained.

  Furthermore, there is a switch for supplying electric power to both sides of the heater.

  By this means, a dehumidifier can be obtained that can disconnect the heater from the power source when the dehumidifier is stopped in a state in which the commercial power is turned on.

  Furthermore, there is a plurality of switches for supplying power to one side of the heater.

  By this means, it is possible to obtain a dehumidifier capable of extremely reducing the increase in the temperature of the heater to a temperature at which a safety device such as a thermal fuse is activated by welding a switch for supplying power to the heater.

  Further, the plurality of switches that supply power to the heater are characterized by a mixture of always-on and always-off.

  By this means, a dehumidifier can be obtained that can reduce the number of switches that must be operated rather than the number of switches that supply power to the heater.

  Further, each time the power is supplied to the heater, the order of turning on the plurality of switches is changed, and when the current detection sensor detects that the current has flowed to the heater before the last switch is turned on, All of the switches are turned off, and the abnormality notification display means notifies the abnormality.

  By this means, a dehumidifier capable of detecting a switch failure when supplying power to the heater is obtained.

  Furthermore, when the power supply to the heater is stopped, the order in which the plurality of switches are turned off is changed, and the current value flowing through the heater detected by the current detection sensor immediately after the first switch is turned off does not decrease. All of the remaining switches are turned off, and an abnormality notification display means notifies the abnormality.

  By this means, it is possible to obtain a dehumidifier that can detect a failure such as welding of a switch when power supply to the heater is stopped.

  Further, it is determined whether or not a current flows through the heater immediately after the commercial power is supplied, and when the current flows, the abnormality notification display means notifies the abnormality.

  By this means, it is possible to obtain a dehumidifier capable of detecting a failure such as welding of a switch when the commercial power source is turned on to the dehumidifier.

  Further, after notifying the abnormality, power is not supplied to the heater.

  By this means, if a failure such as welding occurs in the switch, a dehumidifier that does not supply power to the heater can be obtained.

  Further, a hall sensor is used as the current detection sensor.

  By this means, a dehumidifier capable of indirectly detecting the current flowing through the heater is obtained.

  Furthermore, a relay is used for the switch.

  By this means, it is possible to obtain a dehumidifier in which a plurality of switches that supply power to the heater can be mixed with always-on and always-off switches.

  Furthermore, a microcomputer is used for the control unit.

  By this means, it is possible to obtain a dehumidifier that can easily realize a control method in which the value of the current flowing through the heater and a plurality of switches that supply electric power to the heater are operated in conjunction.

  Further, the abnormality notification display means uses an LED.

  By this means, it is possible to obtain a dehumidifier that can notify the user's vision of an abnormality occurring in the dehumidifier.

  Furthermore, a buzzer is used for the abnormality notification display means.

  By this means, it is possible to obtain a dehumidifier that can notify the user's hearing of an abnormality occurring in the dehumidifier.

  According to the present invention, when supplying power to the heater, detecting a failure such as welding of a switch that supplies power to the heater, without raising the temperature of the heater to the temperature at which the temperature fuse of the safety device is blown, A dehumidifier can be obtained that can stop the power supply to the heater and notify the switch abnormality with light or sound.

  Also, when the power supply to the heater is stopped, the switch that supplies power to the heater is detected to have a failure such as welding, and the temperature of the heater is raised to a temperature at which the temperature fuse of the safety device is blown. Thus, a dehumidifier can be obtained that can stop the power supply to the heater and notify the switch abnormality with light or sound.

  According to the first aspect of the present invention, a plurality of switches for supplying power to the heater, a current detection sensor for detecting a current value flowing through the heater, and an abnormality notification display for notifying that the plurality of switches are abnormal. And determining whether or not there is an abnormality in the plurality of switches from the value of the current flowing in the heater detected by the current detection sensor and the ON / OFF of the plurality of switches, It is set as the structure provided with the control part which operates an abnormality alerting display means. With this configuration, each time a plurality of switches are turned on in turn, it checks whether current flows through the heater, detects a failure such as switch welding, etc., up to the temperature at which the temperature fuse that is a safety device is blown The power supply to the heater can be stopped without raising it.

  In addition, it has a feature that there is a switch for supplying power to both sides of the heater, and has an effect that the heater can be disconnected from the power supply when the dehumidifier is stopped with the commercial power supply turned on. .

  In addition, it has a configuration characterized in that there are a plurality of switches for supplying power to one side of the heater, and the switch for supplying power to the heater is welded to raise the temperature of the heater to a temperature at which a safety device such as a temperature fuse operates. This has the effect that it can be made extremely low.

  In addition, it is characterized in that a plurality of switches that supply power to the heater are always ON and always OFF, and the number of switches that must be operated can be reduced compared to the number of switches that supply power to the heater. Has an effect.

  Further, each time the power is supplied to the heater, the order of turning on the plurality of switches is changed, and when the current detection sensor detects that the current has flowed to the heater before the last switch is turned on, the plurality of switches All of the switches are turned off, and the abnormality is notified by the abnormality notification display means, and the failure of the switch can be detected when power is supplied to the heater.

  In addition, when the heater power supply is stopped, the order of turning off the plurality of switches is changed, and the current value flowing through the heater detected by the current detection sensor immediately after turning off the first switch does not decrease. All of the remaining switches are turned off, and an abnormality is notified by an abnormality notification display means, and it has an effect of detecting a failure such as welding of the switch when the power supply to the heater is stopped. .

  Further, immediately after the commercial power is supplied, it is determined whether or not a current flows to the heater, and when the current flows, the abnormality notification display means notifies the abnormality, and the power supply from the commercial power to the dehumidifier It has the effect that it can detect a failure such as welding of a switch when it is turned on.

  In addition, after notifying the abnormality, power is not supplied to the heater, and when a failure such as welding occurs in the switch, the power is not supplied to the heater.

  Further, the hall sensor is used as the current detection sensor, and the current flowing through the heater can be indirectly detected.

  Moreover, it has the structure characterized by using a relay for a switch, and has an effect | action that the switch of always ON and always OFF can be mixed in the some switch which supplies electric power to a heater.

  In addition, the control unit is configured to use a microcomputer, and it is possible to easily realize a control method that operates the current value flowing through the heater and a plurality of switches that supply power to the heater in conjunction with each other. It has the action.

  Moreover, it is set as the structure characterized by using LED for an abnormality notification display means, and it has the effect | action which can alert | report to the user's vision the abnormality which generate | occur | produced in the dehumidifier.

  Moreover, it has the structure characterized by using a buzzer as an abnormality notification display means, and has an effect | action which can alert | report to the user's hearing the abnormality which generate | occur | produced in the dehumidifier.

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

(Embodiment 1)
As shown in FIG. 1, in the dehumidifier of the present invention, the switches 2A and 2B that supply power to the heater 1, the current detection sensor 3 that detects the current flowing through the heater 1, and the switches 2A or 2B It is determined whether there is an abnormality in the switch 2A or the switch 2B based on the abnormality notification display means 4 for notifying that the current flows through the heater 1 detected by the current detection sensor 3 and the ON / OFF of the switch 2A and the switch 2B. When it is determined that there is, there is provided a control unit 5 that operates the abnormality notification display means 4.

  Regarding the dehumidifier configured as described above, control of the switch when supplying power to the heater will be described with reference to FIGS. 1 to 4.

  After power is supplied from the commercial power source 6 to the dehumidifier through the power plug 7 of the dehumidifier, the control unit 5 performs the following control.

  As shown in FIG. 2, N switches are assigned from switch 1 to switch N, and are set so that the switch ON order is the same as the switch number. Since FIG. 1 shows a case where two switches are used, the switch 2A is assigned to the switch 1 and the switch 2B is assigned to the switch 2. The switch 3 and the subsequent switches are not assigned, and the total number of switches is 2.

  When the dehumidifier is operated to supply power to the heater 1, as shown in FIG. 3, the switch 2A assigned to the switch 1 is turned on, and the current detection sensor 3 detects the current I1 flowing through the heater 1 to switch Compare the number with the total number of switches. In the case of the configuration of FIG. 1, the total number of switches is 2, and the switch number is smaller than the total number of switches. Therefore, when current flows through the heater 1, it is determined that the switch 2B has a failure such as welding. 2A is immediately turned off, the abnormality notification display means 4 informs the user of the abnormality and prohibits the heater 1 from being turned on. Conversely, if no current flows through the heater 1, the switch number is incremented by one and the switch 2B of the switch 2 is turned on. The current detection sensor 3 detects the current I1 flowing through the heater 1 and compares the switch number with the total number of switches. . In the case of the configuration of FIG. 1, since the total number of switches is 2, and the switch number matches the total number of switches, if the current does not flow through the heater 1, it is determined that the switch 2A or the switch 2B is out of order. The notification display means 4 informs the user of the abnormality and prohibits the heater 1 from being turned on. Conversely, if a current flows through the heater 1, it is determined that the heater 1 is normally turned on. Next, as shown in FIG. 4, the order of turning on the switch when power is supplied to the heater next time is changed so that the switch number assigned to the switch name and the switch ON order are shifted by one. In the configuration of FIG. 1, since there are two switches, the switch 2B is assigned to the switch 1 and the switch 2A is assigned to the switch 2, so that the order in which the switches are turned on is changed. Then, when power is supplied to the heater 1 next time, the switch 2B will be turned on last, and the two switches are confirmed equally without checking for failure such as welding of only one of the switches. It becomes possible to do.

  As described above, the current flowing through the heater is detected every time a plurality of switches are turned on, and after confirming that the plurality of switches are normally turned on, the order of the switches that are turned on next time is changed, thereby supplying power to the heater 1. Thus, a dehumidifier can be obtained that can detect a failure such as welding of a switch when supplying water, stop supplying power to the heater, and notify the user of the abnormality.

  Here, the control method for supplying power to the heater when the number of switches is two has been described, but a plurality of switches are turned on in order, and it is detected whether current flows through the heater immediately after the switches are turned on. As long as the control method detects a switch abnormality, the number of switches and the control method are not limited, and there is no difference in the operational effects.

  Although not shown in the figure, even if there are multiple switches on one side of the heater, turn on the multiple switches in order and detect whether current flows through the heater immediately after the switches are turned on. If the switch is configured to detect an abnormality of the switch by checking, the location and number of the switches are not limited, and there is no difference in the operation effect.

  Although not shown in the figure, if a Hall sensor is used as the current detection sensor 3, it can be indirectly detected from the electric wire that supplies power to the heater. Here, the Hall sensor is used as the current sensor. However, the type of the sensor to be detected is not limited as long as the current is detected, and there is no difference in the operation effect.

  Although not shown in the figure, if relays are used as heater switches, a mixture of always-on switches and always-off switches can be used, and the number of switches to be operated can be made smaller than the total number of switches. Here, a description is given using a relay as a switch. However, as long as it has a function of supplying and stopping electric power, there is no difference in its operational effect.

  Although not shown in the drawing, if an LED is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, the abnormality notification display means is described using an LED. However, as long as the abnormality is notified to human vision using light such as a liquid crystal display, there is no difference in the function and effect.

  Although not shown in the figure, if a buzzer is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, a description is given using a buzzer as the abnormality notification display means, but there is no difference in the effect of the operation as long as the abnormality is notified to the human hearing by using the sound of a speaker or the like.

  Although not shown in the figure, if a microcomputer is used for the control unit 5, it is possible to control with a small number of parts. However, if the switch ON and the current detection are combined to detect the switch failure and perform the control to notify the abnormality, there is no difference in the operation effect.

  Next, for a dehumidifier having the same configuration, control of the switch when stopping the power supply of the heater will be described with reference to FIGS. 1 and 5 to 7.

  After power is supplied from the commercial power source 6 to the dehumidifier through the power plug 7 of the dehumidifier, the control unit 5 performs the following control.

  As shown in FIG. 5, M switches are assigned from the switch 1 to the switch M, and the switch turn-off order is set to be the same as the switch number. Since FIG. 1 shows a case where two switches are used, the switch 2A is assigned to the switch 1 and the switch 2B is assigned to the switch 2. The switch 3 and the subsequent switches are not assigned, and the total number of switches is 2.

  When the dehumidifier is stopped and the power supply to the heater 1 is stopped, the switch 2A assigned to the switch 1 is turned off as shown in FIG. 6, and the current I2 of the heater 1 is detected by the current detection sensor 3. Check whether the current flowing to 1 stops. If the current of the heater 1 does not stop, it is determined that the switch 2A has a failure such as welding, the switch 2B is immediately turned OFF, the abnormality notification display means 4 notifies the user of the abnormality, and the heater 1 is turned on. Ban. When the current of the heater 1 is stopped, it is determined that the heater 1 has been normally turned off, and the switch turn-off sequence when the power supply to the heater 1 is stopped next time is switched to the switch name as shown in FIG. Change so that the switch number to be assigned and the switch OFF order are shifted by one. In the case of two switches, the switch 2B is assigned to the switch 1 and the switch 2A is assigned to the switch 2. When the power supply to the heater 1 is stopped next time, the switch 2B is turned off first, and it is possible to detect a failure such as welding of the switch 2B.

  In this way, immediately after turning off the first switch using multiple switches, confirm that the current that was flowing to the heater has stopped, change the order of the switches that are turned off next time after turning off all the switches. The dehumidifier can detect malfunctions such as welding of the switch when the power supply to the heater is stopped, and notify the user of the abnormality by stopping the power supply to the heater with another switch. can get.

  Here, the control method for stopping the power supply to the heater when the number of switches is two has been described. However, whether or not the current flowing through the heater is stopped immediately after the plurality of switches are turned OFF and the switches are turned OFF. As long as the control method detects a switch abnormality by detecting and confirming, the number of switches and the control method are not limited, and there is no difference in the operation effect.

  Although not shown in the figure, whether or not the current flowing through the heater stops immediately after turning off one of the switches, even if there are multiple switches on one side of the heater If it is the structure which detects abnormality of a switch by detecting and confirming, it will not be limited to the place and number of switches, and the difference in the effect does not arise.

  Although not shown in the figure, if a Hall sensor is used as the current detection sensor 3, it can be indirectly detected from the electric wire that supplies power to the heater. Here, the Hall sensor is used as the current sensor. However, the type of the sensor to be detected is not limited as long as the current is detected, and there is no difference in the operation effect.

  Although not shown in the figure, if relays are used as heater switches, a mixture of always-on switches and always-off switches can be used, and the number of switches to be operated can be made smaller than the total number of switches. Here, a description is given using a relay as a switch. However, as long as it has a function of supplying and stopping electric power, there is no difference in its operational effect.

  Although not shown in the drawing, if an LED is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, the abnormality notification display means is described using an LED. However, as long as the abnormality is notified to human vision using light such as a liquid crystal display, there is no difference in the function and effect.

  Although not shown in the figure, if a buzzer is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, a description is given using a buzzer as the abnormality notification display means, but there is no difference in the effect of the operation as long as the abnormality is notified to the human hearing by using the sound of a speaker or the like.

  Although not shown in the figure, if a microcomputer is used for the control unit 5, it is possible to control with a small number of parts. However, if the switch OFF and the current detection are combined to detect the switch failure and notify the abnormality, there is no difference in the effect.

  In addition, regarding a dehumidifier having the same configuration, switch control for checking a switch failure immediately after power is supplied from a commercial power source to the dehumidifier will be described with reference to FIGS. 1 and 8.

  After power is supplied from the commercial power source 6 to the dehumidifier through the power plug 7 of the dehumidifier, the control unit 5 performs the following control.

  As shown in FIG. 8, when power is supplied to the dehumidifier, the current detection sensor 3 detects the current I <b> 3 flowing through the heater 1 to check whether the current flows through the heater 1. When a current flows through the heater 1, it is determined that there is an abnormality in the heater 1, the switch 2A, or the switch 2B, all the switches are operated so as to cut off the power supply to the heater 1, and the abnormality notification display means 4 Then, the control is performed to notify the user of the abnormality and prohibit the heater 1 from being turned on.

  The switch here means a switch that supplies power to the heater or stops it, and does not mean a switch that starts or stops the operation of the dehumidifier.

  In this example, there are two switches. However, if the method of detecting and checking whether current flows through the heater immediately after the dehumidifier power plug is inserted into the commercial power supply, The number and the control method are not limited, and there is no difference in the operation effect.

  Although not shown in the figure, if a Hall sensor is used as the current detection sensor 3, it can be indirectly detected from the electric wire that supplies power to the heater. Here, the Hall sensor is used as the current sensor. However, the type of the sensor to be detected is not limited as long as the current is detected, and there is no difference in the operation effect.

  Although not shown in the figure, if relays are used as heater switches, a mixture of always-on switches and always-off switches can be used, and the number of switches to be operated can be made smaller than the total number of switches. Here, a description is given using a relay as a switch. However, as long as it has a function of supplying and stopping electric power, there is no difference in its operational effect.

  Although not shown in the drawing, if an LED is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, the abnormality notification display means is described using an LED. However, as long as the abnormality is notified to human vision using light such as a liquid crystal display, there is no difference in the function and effect.

  Although not shown in the figure, if a buzzer is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, a description is given using a buzzer as the abnormality notification display means, but there is no difference in the effect of the operation as long as the abnormality is notified to the human hearing by using the sound of a speaker or the like.

  Although not shown in the figure, if a microcomputer is used for the control unit 5, it is possible to control with a small number of parts. However, if the switch OFF and the current detection are combined to detect the switch failure and notify the abnormality, there is no difference in the effect.

  In addition, the explanation is given separately when the power is supplied to the heater, when the power supply to the heater is stopped, and when the power to the dehumidifier is turned on. If the switch detects a switch failure by detecting the current flowing through the heater when the power is turned off or when the power is turned on, there is no difference in the effect.

(Embodiment 2)
The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 9, the dehumidifier of the present invention includes a normally open switch 8 and a normally closed switch 9. The normally open switch 8 is a switch that is normally non-conductive when the switch is not operated, and the normally closed switch 9 is a switch that is always conductive when the switch is not operated.

  Control of the switch for supplying the power of the heater of the dehumidifier configured as described above will be described with reference to FIGS.

  As shown in FIG. 9, immediately after power is supplied from the commercial power supply 6 to the dehumidifier through the power plug 7, the current I3 flowing from the current detection sensor 3 to the heater 1 is detected as shown in FIG. If the current is flowing, it is judged that the normally open switch 8 has a failure such as welding immediately after the dehumidifier is turned on, and the normally closed switch 9 is turned off to cut off the power to the heater 1. And the dehumidifier which can notify a user of abnormality by the abnormality notification display means 4 is obtained.

  Further, in the configuration as shown in FIG. 9, since only the normally open switch 8 needs to be operated when the power is supplied to the heater 1, only the power to the heater 1 is supplied. The number of switch operations is the same as when one switch is used, and energy-saving control is possible.

  The switch here means a switch that supplies power to the heater or stops it, and does not mean a switch that starts or stops the operation of the dehumidifier.

  In this example, there are two switches. However, if the method of detecting and checking whether current flows through the heater immediately after the dehumidifier power plug is inserted into the commercial power supply, The number and the control method are not limited, and there is no difference in the operation effect.

  Although not shown in the figure, if a Hall sensor is used as the current detection sensor 3, it can be indirectly detected from the electric wire that supplies power to the heater. Here, the Hall sensor is used as the current sensor. However, the type of the sensor to be detected is not limited as long as the current is detected, and there is no difference in the operation effect.

  Although not shown in the figure, if relays are used as heater switches, a mixture of always-on switches and always-off switches can be used, and the number of switches to be operated can be made smaller than the total number of switches. Here, a description is given using a relay as a switch. However, as long as it has a function of supplying and stopping electric power, there is no difference in its operational effect.

  Although not shown in the drawing, if an LED is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, the abnormality notification display means is described using an LED. However, as long as the abnormality is notified to human vision using light such as a liquid crystal display, there is no difference in the function and effect.

  Although not shown in the figure, if a buzzer is used for the abnormality notification display means 4, the abnormality of the user can be notified. Here, a description is given using a buzzer as the abnormality notification display means, but there is no difference in the effect of the operation as long as the abnormality is notified to the human hearing by using the sound of a speaker or the like.

  Although not shown in the figure, if a microcomputer is used for the control unit 5, it is possible to control with a small number of parts. However, if the switch OFF and the current detection are combined to detect the switch failure and notify the abnormality, there is no difference in the effect.

  In addition, here, a method for detecting a failure such as welding of a switch when the power is turned on is described. However, this method can be used in combination with a method for detecting a switch failure by detecting a current flowing through the heater when the switch is turned ON / OFF. Even if it exists, the difference does not arise in the effect.

  The control of the dehumidifier of the present invention can also be applied to uses such as control of heaters of general household appliances.

The block diagram of the dehumidifier of Embodiment 1 of this invention Diagram showing the order in which the switches are turned on Flowchart for detecting a switch error when turning on the switch The figure which shows the order change which turns on the same switch The figure which shows the order which the same switch turns off Flowchart for detecting a switch abnormality when the switch is turned off The figure which shows the table of the order change which turns off the switch Flow chart for detecting abnormalities when the switch is turned on Configuration diagram of dehumidifier according to Embodiment 2 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heater 2A switch 2B switch 3 Current detection sensor 4 Abnormality notification display means 5 Control part 6 Commercial power supply 7 Power plug 8 Normally open switch 9 Normally closed switch

Claims (13)

A plurality of switches for supplying power to the heater, a current detection sensor for detecting a current value flowing through the heater, an abnormality notification display means for notifying that there is an abnormality in the plurality of switches, and detected by the current detection sensor A controller for operating the abnormality notification display means when determining whether or not there is an abnormality in the plurality of switches from the value of the current flowing through the heater and ON / OFF of the plurality of switches; A dehumidifier characterized by comprising. The dehumidifier according to claim 1, wherein a switch for supplying electric power is provided on both sides of the heater. The dehumidifier according to claim 1 or 2, wherein there are a plurality of switches for supplying electric power to one side of the heater. The dehumidifier according to any one of claims 1 to 3, wherein a plurality of switches that supply power to the heater are always ON and always OFF. Each time the power is supplied to the heater, the order of turning on the plurality of switches is changed, and when the current detection sensor detects that a current has flowed to the heater before the last switch is turned on, 5. The dehumidifier according to claim 1, wherein all of the dehumidifiers are turned off and an abnormality notification display unit notifies the abnormality. Change the turn-off order of multiple switches each time the heater power supply is stopped, and if the current value flowing through the heater detected by the current detection sensor immediately after turning off the first switch does not decrease, the remaining The dehumidifier according to any one of claims 1 to 5, wherein all of the switches are turned off, and abnormality is notified by an abnormality notification display means. 7. The apparatus according to claim 1, wherein it is determined whether or not a current flows through the heater immediately after the commercial power is supplied, and when the current flows, the abnormality notification display unit notifies the abnormality. Dehumidifier. The dehumidifier according to any one of claims 1 to 7, wherein after the abnormality is notified, power is not supplied to the heater. The dehumidifier according to claim 1, wherein a hall sensor is used as the current detection sensor. The dehumidifier according to any one of claims 1 to 9, wherein a relay is used for the switch. The dehumidifier according to claim 1, wherein a microcomputer is used for the control unit. The dehumidifier according to claim 1, wherein an LED is used as the abnormality notification display unit. The dehumidifier according to claim 1, wherein a buzzer is used as the abnormality notification display unit.

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