JP2010054130A - Bathroom heating/drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly balance the improvement of temperature raising capacity and the suppression of introduction costs. <P>SOLUTION: This electric heater type bathroom heating/drying device 1 includes a storage battery 30, a DC heater 10 generating heat driven by DC power, an AC heater 20 generating heat driven by AC power, a DC heater driving circuit 50 for driving the DC heater 10 by DC power charged in the storage battery 30, an AC heater driving circuit 60 driving the AC heater 20 by commercial power, and a microcomputer 100 for charging the storage battery 30 by the commercial power in a prescribed time zone, and driving the DC heater 10 and the AC heater 20 by the DC heater driving circuit 50 and the AC heater driving circuit 60 in a time zone excluding the prescribed time zone. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric heater type bathroom heating / drying apparatus.

  If you move from a warm room to a cold room or use hot water, the human body will be burdened by a sudden temperature change (heat shock). For example, a burden such as a rapid change in blood pressure or an accelerated pulse may be placed on the human body, resulting in health damage such as myocardial infarction or cerebrovascular disorder. In Japan, it has been reported that more than 10,000 deaths per year (of which 70% are elderly people) occur in the bathroom in the winter due to heat shock. It is speculated that not only the customs of the Japanese people, but also the construction of the buildings in Japan (size and layout of windows, room layout, south-facing beliefs, etc.) are likely to have an influence.

  In Japan, it is said that the response of the building side to the heat shock has been delayed with respect to the Western countries so far, and now that it has already entered the aging society, the response to this heat shock is Is an urgent need. Therefore, as one of the countermeasures, a bathroom heating / drying apparatus has been proposed by an electric power company or the like. The bathroom heating and drying device is installed on the ceiling or wall of the bathroom, and has a bathroom heating function that heats the bathroom by blowing out hot air, and a bathroom drying function that dries laundry that is suspended in the bathroom. ,have.

  There are two types of bathroom heating / drying devices: a hot water type and an electric heater type. The hot water type is a system in which hot water is circulated in the heat exchanger, the air taken in by the intake fan is heated, and hot air is blown into the bathroom by the blower fan. The hot water type includes a gas type and an electric type. The electric heater method is a method in which the interior of the bathroom is heated by the heat of the electric heater (see, for example, Patent Document 1 shown below).

  In the case of the hot water type (electric type), there are advantages such as the ability to reduce running costs by using inexpensive late-night power, but if you are going to introduce it into an existing house, the hot water piping around the bathroom A large-scale reform such as installation is required, and the initial cost is expensive. Also, in the case of hot water (electric) type, in bathrooms where humidity is high and mold is likely to occur, there is a risk of aging the intake fan and heat exchanger, which is said to be unsuitable as a heating device for bathrooms. Yes.

On the other hand, in the case of the electric heater type, compared to the hot water type, it is not necessary to add a new hot water supply pipe or hot water heater, and it is easy to attach it to an existing bathroom ventilation fan, so the initial cost is low. I can finish it. Moreover, since it is not necessary to inhale the air in the bathroom in terms of the heating function, it is suitable as a heating device for the bathroom.
JP 2002-221331 A

  By the way, as the electric heater type bathroom heating / drying apparatus, those of 100V specification and those of 200V specification are commercially available. FIG. 5 shows an example of a temperature change in the bathroom when the temperature is raised from a bath temperature of 5 ° C. in a unit bath equivalent to 1 tsubo of the bathroom for the purpose of comparing the performances of both specifications. In this case, in the 100V specification (power consumption is about 1.5 kW), it takes time to increase the temperature, and it is impossible to raise the temperature to a hot water temperature (about 40 ° C.). In addition, when the bathroom specification is wide, tiled, large windows, or when the place is in a cold district, the 100 V specification has insufficient heating capability as a heat shock countermeasure.

  On the other hand, in the case of the 200V specification, the temperature raising capability is high, but the power consumption (about 2.5 kW) is increased accordingly, so that installation becomes difficult. In recent years, with the improvement of air conditioner performance, air conditioning heating with low running cost has become common, so there is a tendency for power consumption to increase in the cold season of winter. If necessary, it is not only necessary to change the contract power and renovate the power receiving equipment, but it is difficult to introduce it in a general metered electricity bill contract at home. In this case, not only the cost of repairing the power receiving equipment is required, but also the unit price of electricity is high, and the above electricity rate contract does not use inexpensive late-night power as in the case of the 100V specification. , Running costs become expensive.

  In other words, in the case of an electric heater type bathroom heating / drying apparatus, the initial cost is low if it can be handled with a low capacity of 100V specifications, but if it is attempted to improve the temperature raising capacity, the power consumption is as in the 200V specifications. As a result, there has been a problem that the introduction cost such as the repair cost and running cost of the power receiving equipment becomes expensive.

  This invention is made | formed in view of said problem, The objective is to provide the heating apparatus which achieves the improvement of temperature rising capability and suppression of introduction cost with sufficient balance.

  The main present invention for solving the above-mentioned problems is an electric heater type bathroom heating / drying apparatus, which is a storage battery, a DC heater that generates heat when driven by DC power, and an AC heater that generates heat when driven by AC power A DC heater driving circuit for driving the DC heater with DC power charged in the storage battery, an AC heater driving circuit for driving the AC heater with commercial power, and charging the storage battery with commercial power for a predetermined time period. And a controller for driving the DC heater and the AC heater by the DC heater driving circuit and the AC heater driving circuit in a time zone other than the predetermined time zone.

  Further, in the bathroom heating / drying device described above, the DC heater has a plurality of heating elements, and the DC heater drive circuit supplies DC power charged in the storage battery to each of the plurality of heating elements. A plurality of power switches provided on the power line to be provided.

  Further, in the bathroom heating / drying apparatus described above, the DC heater driving circuit includes a resistance element commonly connected in series to each of the plurality of power switches, and a plurality of resistors connected in parallel to each of the plurality of power switches. An auxiliary switch, and a DC cutoff switch commonly connected in series to each of the plurality of auxiliary switches, and when the controller drives the DC heater, the power switch, the auxiliary switch, and the DC cutoff When closing the power switch from the open state and stopping the DC heater, after closing the auxiliary switch from the closed state, the power switch, the DC cutoff switch, the auxiliary switch, It may be opened sequentially.

  Moreover, it is said bathroom heating drying apparatus, Comprising: The said resistance element is good also as being a shunt resistance element which detects the discharge current of the said storage battery.

  Further, in the bathroom heating / drying apparatus described above, the control unit causes the DC heater driving circuit to drive at least one of the plurality of heating elements according to the amount of heat generated by the DC heater. Also good.

  Moreover, it is good also as said bathroom heating drying apparatus, Comprising: The voltage of the said commercial power is 100V.

  Further, in the bathroom heating / drying device described above, the AC heater may be a far infrared heater.

  Moreover, it is said bathroom heating drying apparatus, Comprising: The said storage battery is good also as being a lithium ion storage battery.

  ADVANTAGE OF THE INVENTION According to this invention, the bathroom heating drying apparatus which achieves the improvement of temperature rising capability and suppression of introduction cost with sufficient balance can be provided.

=== Overall configuration of bathroom heating / drying apparatus ===
FIG. 1 is a diagram showing an overall configuration of an electric heater type bathroom heating / drying apparatus 1 according to the present embodiment.

  The bathroom heating / drying apparatus 1 includes a DC heater 10, an AC heater 20, a storage battery 30, a rectifier 40, a charger 42, a DC heater drive circuit 50, an AC heater drive circuit 60, a circulation fan 70, a circulation motor 72, and a circulation motor drive circuit 74. , A microcomputer (abbreviation for microcomputer) 100 and a remote controller (abbreviation for remote control) receiver 110. The bathroom heating / drying apparatus 1 is supplied with commercial power (AC 100 V) from a domestic distribution board 220 that receives the commercial power supply 210.

  The DC heater 10 is a heater having a plurality of heating elements that are driven by DC power to generate heat. Note that the plurality of heating elements include, for example, a nichrome wire wound in a coil shape, a thin sheet metal foil, and the like. In addition, the plurality of heating elements use power obtained by dividing predetermined power consumption required for the DC heater 10 as power consumption.

In the present embodiment, the plurality of heating elements are four heating elements RD1 to RD4 as shown in FIG. 1, but the number is not limited thereto. Further, the division of the predetermined power consumption includes a case of division by equal division and a case of division by a predetermined ratio. In the case of division by equal division, for example, if 1 kW is required for the DC heater 10, the power consumption of each of the heating elements RD1 to RD4 can be 0.25 kW obtained by dividing 1 kW into four equal parts. In the case of division at a predetermined ratio, for example, when 1 kW is required for the DC heater 10, the power consumption of each of the heating elements RD1 to RD4 can be sequentially set to 400W, 300W, 200W, and 100W. Since the output can be obtained by combining the heating elements RD1 to RD4 by dividing in this way, the output of 250 W, 500 W, 750 W, 1 kW is obtained in the case of division by equal division, and 1 kW in the case of a predetermined ratio. Output up to 100W can be obtained.

  The AC heater 20 is a heater having a heating element RA that is driven by AC power to generate heat. As with the DC heater 10, the heating element RA includes a nichrome wire type and a metal foil type. The AC heater 20 is preferably a far infrared heater. According to the far-infrared heater, it is possible to directly irradiate the object to be heated with infrared radiant heat and to heat the inside of the object. It becomes possible to heat.

  The storage battery 30 can employ various storage batteries such as a lead storage battery, a nickel hydride storage battery, and a lithium ion storage battery. The storage battery 30 is charged using midnight power in the midnight time zone, and the charged power needs to be held until a time zone other than the midnight time zone (when using the bathroom in the evening). Moreover, the bathroom heating / drying apparatus 1 is a heating application for bathrooms that is usually used every day, and it is assumed that the storage battery 30 is charged and discharged every day. Therefore, as compared with other storage batteries, the storage battery 30 has a small memory effect (a phenomenon of storing a capacity smaller than the original capacity as its own capacity), excellent self-discharge characteristics (charging energy retention characteristics), and additional charging. It is preferable to employ a lithium ion storage battery suitable for non-fully charged storage.

  The rectifier 40 is a mechanism that converts commercial power supplied from the distribution board 220 into DC power. The charger 42 is a mechanism that converts the alternating current power (alternating current) supplied from the distribution board 220 into direct current power of an appropriate voltage and charges the storage battery 30. The charger 42 can be configured by, for example, a power switch that opens and closes based on the control signal CLC.

  The DC heater drive circuit 50 is a circuit that drives the DC heater 10 with DC power charged in the storage battery 30. The DC heater drive circuit 50 includes power switches (SW11, SW21, SW31, SW41) provided on power supply lines 52a to 52d for supplying DC power charged in the storage battery 30 to the heating elements RD1 to RD4 of the DC heater 10, respectively. And auxiliary switches (SW12, SW22, SW32, SW42) connected in parallel with the power switches (SW11 to SW41), respectively.

  Further, the DC heater drive circuit 50 includes a DC cutoff switch SW5 connected in series with each of the auxiliary switches (SW12 to SW42) in common on the storage battery 30 side. The DC cut-off switch SW5 is provided on the power supply line 54 connected to one end of the shunt resistor element 56 on the storage battery 30 side, and is an auxiliary switch (on the power supply lines 53a to 53d branched from the other end of the power supply line 54). SW12 to SW42) are connected in series with each other.

  Further, the DC heater driving circuit 50 includes a shunt resistor element 56 connected in series with each of the power switches (SW11 to SW41) and the storage battery 30 in common. An overcurrent protection element fuse Fuse is provided between the storage battery 30 and the shunt resistance element 56 to protect the DC heater drive circuit 50 when an abnormal large current flows.

  The shunt resistance element 56 is suitable for current detection of a load that consumes a large current, such as the DC heater 10, and detects the discharge current of the storage battery 30 (that is, the current consumption of the entire DC heater 10) as a voltage across the both ends. The shunt resistance element 56 is not limited and a normal resistance element may be used.

  The detection voltage VD2 detected as the voltage across the shunt resistance element 56 is supplied to the microcomputer 100 via an AD converter (not shown) or the like. Thereby, the microcomputer 100 calculates the current consumption of the entire DC heater 10 based on the detection voltage VD2 of the shunt resistance element 56. Furthermore, the microcomputer 100 can control the DC heater 10 by calculating the output of the entire DC heater 10 using the output voltage VD1 of the storage battery 30, and can grasp the remaining capacity of the storage battery 30.

  The AC heater drive circuit 60 is a circuit that drives the AC heater 20 with commercial power supplied from the distribution board 220.

  The circulation fan 70 is a fan that circulates air in a bathroom or a room adjacent to the bathroom. The circulation fan motor 72 is a motor that rotationally drives the circulation fan 70. Circulation fan motor drive circuit 74 is a circuit that drives circulation fan motor 72 with commercial power supplied from distribution board 220.

  The microcomputer 100 is a processor that can be operated by DC power supplied from the rectifier 40 and controls the entire bathroom heating / drying apparatus 1. However, since the bathroom heating / drying apparatus 1 drives the DC heater 10 using the storage battery 30, the DC heater 10 operates even during a power failure. For this reason, it is assumed that a storage battery (not shown) for power failure compensation is provided as a power source for the microcomputer 100 in order to enable control even during a power failure.

  The microcomputer 100 opens and closes the control signal CLC for instructing the charger 42 to start or stop charging, and the DC heater drive circuit 50 to open and close the power switches (SW11 to 41), the auxiliary switches (SW21 to 42), and the DC cutoff switch SW5. A control signal CLD to be commanded, a control signal CLA to command the AC heater driving circuit 60 to operate or stop, and a control signal CLM to command the circulating motor driving circuit 74 to operate or stop are output. Although details will be described later, the microcomputer 100 includes a clock function 102 for determining whether or not the current time is a midnight time zone.

  The remote control receiver 110 can perform wired communication and / or wireless communication with the remote control 112 and receives a command from the remote control 112. The remote controller 112 can select a bathroom heating mode, a bathroom drying mode, or the like as a command for operating or stopping the bathroom heating / drying apparatus 1 or an operation mode of the bathroom heating / drying apparatus 1.

  The bathroom heating mode is a mode for performing preliminary heating before bathing, and the DC heater 10 and the AC heater 20 are driven when this mode is executed. The bathroom drying mode is a mode for drying the laundry using the bathroom in the rain or removing moisture from the bathroom. In addition to the DC heater 10 and the AC heater 20 when executing this mode, the bathroom drying mode is used. Then, the circulation fan 70 is driven.

<< Operation of Bathroom Heating Dryer >>
=== Overview ===
FIG. 2 is a flowchart showing an outline of main control of the bathroom heating / drying apparatus 1. The process flow shown in FIG. 2 will be described below.

  The microcomputer 100 determines whether or not the current time is in the midnight time zone by using the clock function 102 (S200). The midnight time zone is a predetermined time zone in which inexpensive midnight power can be used, which is defined by the charge system of the electric power company. In the case of the midnight time zone (S200: YES), the microcomputer 100 outputs a control signal CLC instructing the charger 42 to start charging. Thereby, the charger 42 charges the storage battery 30 using late-night power (S201). Then, in response to the fact that the storage battery 30 is fully charged (S202: YES), the charging process is terminated and the process returns to S200. Note that the charger 42 detects the amount of charge of the storage battery 30 based on the charging voltage, charging current, and the like for which charging control is performed, and the microcomputer 100 receives a signal indicating the detection result, whereby the microcomputer 100 Can determine whether or not the storage battery 30 is fully charged.

  On the other hand, in a time zone other than the midnight time zone (S200: NO), the microcomputer 100 determines whether or not a command for the bathroom heating mode is received from the remote control 112 via the remote control receiver 110. The case where the instruction of the bathroom heating mode is received is, for example, when the person who lives in the residence where the bathroom heating / drying apparatus 1 is installed uses the bathroom around the evening and selects the bathroom heating mode by operating the remote control 112. Etc.

  When the microcomputer 100 receives an instruction for the bathroom heating mode or the bathroom drying mode from the remote control receiver 110 (S203: YES), the microcomputer 100 drives both the DC heater 10 and the AC heater 20 with respect to the DC heater driving circuit 50 and the AC heater driving circuit 60. Control is performed (S204). When the bathroom heating mode or the bathroom drying mode is terminated (S205: YES), the DC heater driving circuit 50 and the AC heater driving circuit 60 are controlled to stop driving the DC heater 10 and the AC heater 20 (S206). Return to S200.

  With the above processing, the power consumption required in the bathroom heating mode or the bathroom drying mode can be divided into the DC heater 10 and the AC heater 20. The DC heater 10 can be driven by using inexpensive midnight power charged in the storage battery 30, while the AC heater 20 uses commercial power other than the midnight time zone for the power consumption of the DC heater 10. Can be saved. Accordingly, the bathroom heating / drying apparatus 1 can achieve a good balance between improving the temperature raising capability and suppressing running costs.

=== Stop driving the DC heater ===
When stopping the driving of the DC heater 10, the supply of DC power from the storage battery 30 via the DC heater driving circuit 50 is cut off. In addition, since a direct current does not have a current zero point like an alternating current, it is difficult to interrupt a large current. In other words, when the switch is disconnected, an arc discharge occurs in the space and the current continues to flow, but in the case of a large DC current, the arc discharge is not automatically stopped as in the case of an AC current. A resistance to arc discharge is required and a mechanism for forcibly extinguishing the arc is required. For this reason, in general, a switch for cutting off a direct current is very expensive.

  Therefore, as described above, the auxiliary switch (SW12 to 42) and the DC cutoff switch SW5 are provided in parallel to the power switch (SW11 to SW41) and the shunt resistor element 56 that supply DC power to each of the heating elements RD1 to RD4. It has a configuration. And by opening and closing each switch according to the opening and closing sequence shown in FIG. 3, the DC cutoff switch SW5 can be shared when the DC power supplied to each of the heating elements RD1 to RD4 is cut off.

  In the following, the opening / closing sequence of each switch when the driving of the DC heater 10 shown in FIG. 3 is stopped will be described in detail. Note that times T0 to T16 shown in FIG. 3 represent the beginning of each cycle of the open / close sequence of each switch. Moreover, ON / OFF shown in the figure represents closing / opening of each switch. Further, CLD0 to CLD16 shown in the figure represent the control signal CLD output from the microcomputer 100 for each cycle of the open / close sequence of each switch.

  Prior to time T0, the DC heater drive circuit 50 drives the DC heater 10 according to a control signal CLD0 (including a DC heater 10 drive command, an open / close command for each switch, etc.) sent from the microcomputer 100. At this time, the power switches (SW11 to SW41) are closed, and the auxiliary switches (SW12 to SW42) and the DC cutoff switch SW5 are open. Therefore, the DC power charged in the storage battery 30 is distributed and supplied to each of the heating elements RD1 to RD4 via the shunt resistor element 56 and the power switches (SW11 to SW41).

  In the period from time T0 to T1, the DC heater drive circuit 50 starts control for stopping the drive of the DC heater 10 by the control signal CLD1 (OFF) sent from the microcomputer 100. Specifically, the DC heater drive circuit 50 switches the auxiliary switch SW12 and the DC cutoff switch SW5 from the open / close state of each switch before time T0 based on the open / close command included in the control signal CLD1 sent from the microcomputer 100. close.

  As a result, the DC power supply path from the storage battery 30 to the heating element RD1 includes a power line 52a through which the shunt resistor element 56 and the power switch SW11 are interposed, and a power line through which the DC cutoff switch SW5 and the auxiliary switch SW12 are interposed ( 54, 53a). The power supply line 52a has a larger impedance than the power supply lines (54, 53a) because the shunt resistance element 56 is interposed. For this reason, the direct current flowing through the power supply line 52a decreases to a state close to the current zero point, the generation of arc is suppressed, and the power switch SW11 can be easily opened.

  During the period from time T1 to time T2, the DC heater drive circuit 50 opens the power switch SW11 based on the open / close command included in the control signal CLD2 sent from the microcomputer 100. As a result, the supply of DC power from the storage battery 30 to the heating element RD1 via the power supply line 52a is interrupted. Note that the supply of DC power from the storage battery 30 to the heating element RD1 via the power line 54 is continued.

  During the period from time T2 to T3, the DC heater drive circuit 50 opens the DC cutoff switch SW5 based on the open / close command included in the control signal CLD3 sent from the microcomputer 100. As a result, the supply of DC power from the storage battery 30 to the heating element RD1 via the power line 54 is cut off.

  During the period from time T3 to time T4, the DC heater driving circuit 50 opens the auxiliary switch SW12 based on the opening / closing command included in the control signal CLD4 sent from the microcomputer 100. As a result, the auxiliary switch SW12 and the DC cutoff switch SW5 return to the original state before time T0.

  In the subsequent period, the supply of DC power is cut off in the order of the heating element RD2, the heating element RD3, and the heating element RD4 in the same manner as the DC cutoff process for the heating element RD1.

  In the period from time T4 to T8, the supply of DC power from the storage battery 30 to the heating element RD2 is interrupted. Specifically, after closing the auxiliary switch SW22 and the DC cutoff switch SW5 (period T4 to T5), the power switch SW21 (period T5 to T6) and DC cutoff switch SW5 (period T6 to T7). Then, the auxiliary switch SW22 (period from time T7 to T8) is sequentially opened.

  In the period from time T8 to T12, supply of DC power from the storage battery 30 toward the heating element RD3 is interrupted. Specifically, after closing the auxiliary switch SW32 and the DC cutoff switch SW5 (period T8 to T9), the power switch SW31 (period T9 to T10) and DC cutoff switch SW5 (period T10 to T11). Then, the auxiliary switch SW32 (period of time T11 to T12) is sequentially opened.

  During the period from time T12 to time T16, the supply of DC power from the storage battery 30 to the heating element RD4 is interrupted. Specifically, after closing the auxiliary switch SW42 and the DC cutoff switch SW5 (period T12 to T13), the power switch SW41 (period T13 to T14) and DC cutoff switch SW5 (period T14 to T15). Then, the auxiliary switch SW42 (period from time T15 to T16) is sequentially opened.

  At time T16, all the power switches SW11, SW21, SW31, and SW41 that were closed before time T0 are all open. Further, the auxiliary switches SW12, SW22, SW32, SW42 and the DC cutoff switch SW5 are also returned to the opened state before the time T0. As a result, the supply of DC power from the storage battery 30 is cut off to all the heating elements RD1 to RD4 of the DC heater 10.

  As described above, the heating element to be provided in the DC heater 10 is divided into four heating elements RD1 to RD4, and the power switches (SW11 to SW41) for supplying DC power to the heating elements RD1 to RD4 are arranged. With this configuration, the power consumption required for the DC heater 10 is distributed to the power switches (SW11 to SW41). You can do it.

  Further, auxiliary switches (SW12 to SW42) are provided in parallel to the power switches (SW11 to SW41), and a DC cutoff switch SW5 is connected in series to each of the auxiliary switches (SW12 to SW42). Then, as a stage before opening the power switches (SW11 to SW41), the DC cutoff switch SW5 and the auxiliary switches (SW12 to SW42) are closed. As a result, the direct current that flows through the power switches (SW11 to SW41) decreases because it commutates toward the direct current cut-off switch SW5 and the auxiliary switch (SW12) (approaching the current zero point), and the generation of an arc is prevented. It is possible to easily open the power switches (SW11 to SW41) while holding down. Further, it is not necessary to employ an expensive direct current cut-off switch as the power switch (SW11 to SW41).

  In addition, since the DC power supplied to each of the heating elements RD1 to RD4 is sequentially cut (individually), the DC cutoff capability required for the DC cutoff switch SW5 can be suppressed. Therefore, it is not necessary to employ an expensive DC cutoff switch SW5.

=== Control of the amount of heat generated by the DC heater ===
When the DC heater 10 is driven, not only a mode in which all of the heating elements RD1 to RD4 are heated, but also a mode in which any one of the heating elements RD1 to RD4 is heated according to the amount of heat specified as the DC heater 10. Also good. For example, in the bathroom drying mode, all of the heating elements RD1 to RD4 may generate heat, and in the bathroom heating mode, any of the heating elements RD1 to RD4 may generate heat.

  FIG. 4 is a timing chart for explaining the control of the amount of heat generated by the DC heater 10. In the example shown in the figure, only the heating element RD1 among the heating elements RD1 to RD4 is heated (hereinafter referred to as a 1/4 ON mode), and thereafter the heating of the heating element RD1 is stopped.

  Prior to time T0, the DC heater drive circuit 50 stops driving the DC heater 10 by a control signal CLD0 (including a DC heater 10 drive stop command, a switch open / close command, etc.) sent from the microcomputer 100. Yes. At this time, the power switches (SW11 to SW41), the auxiliary switches (SW12 to SW42), and the DC cutoff switch SW5 are all open.

  In the period from time T0 to time T1, the DC heater drive circuit 50 performs control to cause the heating element RD1 of the DC heater 10 to generate heat by the control signal CLD1 (1/4 ON mode) sent from the microcomputer 100. Specifically, the DC heater drive circuit 50 closes the power switch SW11 based on the open / close command included in the control signal CLD1 sent from the microcomputer 100 from the open / close state of each switch before time T0.

  As the subsequent processing, as shown in the figure, the 1/4 ON mode continues until time T2, and when the heat generation of the heating element RD1 is stopped at time T2, the time T2 to T5 shown in FIG. The power switch SW11 is opened in the same way as the times T1 to T4 shown in FIG. 6 to return to the open / closed state of each switch before the time T0.

  While the present embodiment has been described above, the above-described examples are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed / improved without departing from the spirit thereof, and the present invention includes equivalents thereof.

It is the figure which showed the structure of the bathroom heating drying apparatus which concerns on embodiment of this invention. It is the flowchart which showed the outline | summary of main control of the bathroom heating drying apparatus which concerns on embodiment of this invention. It is a timing chart for demonstrating operation | movement of the bathroom heating drying apparatus in the case of stopping the drive of the DC heater which concerns on embodiment of this invention. It is a timing chart for demonstrating operation | movement of the bathroom heating drying apparatus in the case of controlling the emitted-heat amount of the DC heater which concerns on embodiment of this invention. It is the figure which showed the difference of the temperature rising capability of the conventional heater type bathroom heating drying apparatus of 100V specification and 200V specification each.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathroom heating drying apparatus 10 DC heater RD1-RD4, RA Heating body 20 AC heater 30 Storage battery 50 DC heater drive circuit SW11, SW21, SW31, SW41 Power switch SW12, SW22, SW32, SW42 Auxiliary switch SW5 DC cut-off switch 56 Shunt resistance Element 100 Microcomputer (control unit)
210 Commercial power supply

Claims (8)

An electric heater type bathroom heating and drying device,
A storage battery,
A DC heater that is driven by DC power and generates heat;
An AC heater driven by AC power to generate heat;
A DC heater driving circuit for driving the DC heater with DC power charged in the storage battery;
An AC heater driving circuit for driving the AC heater with commercial power;
A controller that charges the storage battery with commercial power in a predetermined time zone, and drives the DC heater and the AC heater by the DC heater drive circuit and the AC heater drive circuit in a time zone other than the predetermined time zone;
A bathroom heating and drying apparatus characterized by comprising: The bathroom heating / drying device according to claim 1,
The DC heater has a plurality of heating elements,
The DC heater drive circuit is
Having a plurality of power switches provided on a power supply line for supplying DC power charged in the storage battery to each of the plurality of heating elements;
Features a bathroom heating and drying device. The bathroom heating / drying apparatus according to claim 2,
The DC heater drive circuit is
A resistance element commonly connected in series to each of the plurality of power switches;
A plurality of auxiliary switches connected in parallel to each of the plurality of power switches;
DC cutoff switch connected in series in common to each of the plurality of auxiliary switches,
Have
The controller is
When driving the DC heater, close the power switch from a state where the power switch, the auxiliary switch and the DC cutoff switch are open,
When stopping the DC heater, after closing the auxiliary switch from the state where the power switch is closed, opening the power switch, the DC cutoff switch, the auxiliary switch in this order,
Features a bathroom heating and drying device. The bathroom heating / drying device according to claim 3,
The resistance element is a shunt resistance element for detecting a discharge current of the storage battery;
Features a bathroom heating and drying device. The bathroom heating / drying device according to any one of claims 2 to 4,
The control unit causes the DC heater drive circuit to drive at least one of the plurality of heating elements according to the amount of heat generated by the DC heater;
Features a bathroom heating and drying device. The bathroom heating / drying apparatus according to any one of claims 1 to 5,
The voltage of the commercial power is 100V,
Features a bathroom heating and drying device. The bathroom heating / drying apparatus according to any one of claims 1 to 6,
The bathroom heater / dryer according to claim 1, wherein the AC heater is a far-infrared heater. The bathroom heating / drying apparatus according to any one of claims 1 to 7,
The bathroom heating / drying device, wherein the storage battery is a lithium ion storage battery.

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