JP5750379B2 - Bathroom heating dryer - Google Patents

Description

  The present invention relates to a bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode. In particular, the present invention relates to a bathroom heater / dryer having a function of notifying a user of the necessity of cleaning a filter attached to an air intake port of a bathroom.

  2. Description of the Related Art Conventionally, there is known a bathroom heating / drying machine in which a heating / drying machine main body including a circulation fan and a ventilation fan and heating means such as a heat exchanger and a heater are embedded in a ceiling wall of a bathroom. This type of bathroom heater / dryer can be used to cool the interior of the bathroom, to cool the bathroom, to heat the interior of the bathroom, to ventilate the interior of the bathroom, and to ventilate the bathroom. It has a plurality of operation modes such as a drying operation for drying the laundry.

  In the bathroom heating dryer as above, a filter is attached to the intake port to remove dust in the air when the bathroom air is sucked into the heating dryer body. Along with this, the filter is clogged, and the circulation performance or ventilation performance is lowered. For this reason, it is proposed that the operation time of the bathroom heater / dryer is accumulated, and that the user needs to be notified of the necessity of filter cleaning when the total operation time becomes a predetermined time or more (for example, Patent Document 1). ).

JP 2009-250522 A

  However, the amount of dust contained in the air on the filter differs in each operation mode. That is, in the dry operation mode in which clothes are dried, the air in the bathroom is circulated and ventilated with the fabric product placed in the bathroom. Therefore, the amount of dust adhering to the filter is larger in the dry operation mode than in other operation modes.

  In the ventilation operation mode, only the ventilation fan is driven. In the dry operation mode, both the circulation fan and the ventilation fan are driven to remove moisture while supplying warm air into the bathroom. Furthermore, in both the heating operation mode and the drying operation mode, the circulation fan is driven, but in the heating operation mode, only the air in the bathroom is circulated, whereas in the drying operation mode as described above, the air in the bathroom is circulated. Need to be circulated and ventilated. Furthermore, the air flow rate of the circulation fan or the ventilation fan may be changed in each operation mode. Accordingly, the amount of air passing through the filter per unit time is different in each operation mode, and the amount of dust adhering to the filter is also different from this point.

  Therefore, when notifying the necessity of cleaning the filter, the actual operation time until the filter is clogged is different in each operation mode. Therefore, as in Patent Document 1, when the necessity for filter cleaning is determined based on only the total operation time, the necessity for filter cleaning is notified even though the filter is not clogged. On the other hand, there is a problem that although the filter cleaning is necessary, it is not notified.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode. The purpose is to more accurately notify the necessity of cleaning the filter attached to the intake port.

The present invention is a bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode,
A filter attached to the air intake of the bathroom;
A circulation fan for circulating air in the bathroom through the filter;
A ventilation fan that exhausts the air in the bathroom to the outside through the filter;
A control unit for determining the necessity of filter cleaning due to clogging of the filter;
An alarm for notifying the necessity of the filter cleaning,
The control unit is
The operation time for each operation mode is multiplied by the operation time for each operation mode multiplied by the filter clogging coefficient specific to each operation mode to obtain the actual total operation time,
Among the plurality of operation modes, during execution of at least the operation mode for driving the circulation fan, the substantial total operation time exceeds a predetermined filter cleaning request time, and the relative humidity in the bathroom is predetermined. If the humidity is less than
In an initial state where the filter is not clogged, an initial operation current value _CSj when the circulation fan is driven at the individual rotation speed set in each operation mode, and the circulation at the same rotation speed as the individual rotation speed. When the current value difference (C _Sj −C _j ) from the operating current value C _j when the fan is driven becomes higher than a predetermined clogging threshold value α _j , the necessity for the filter cleaning is notified from the notification device. It is a bathroom heating dryer.

  According to the above-mentioned bathroom heating dryer, the operation time for each operation mode is calculated by multiplying the operation time of each operation mode by the filter clogging coefficient specific to each operation mode, and this is integrated to obtain the actual total operation time. Therefore, the necessity of filter cleaning can be notified in consideration of the difference in the amount of dust adhering to the filter in each operation mode.

In addition, even if the actual total operation time obtained by weighting each operation time according to the operation mode exceeds the filter cleaning request time, the bathroom environment where the bathroom heating dryer is installed and the bathroom are dried. The amount of dust attached to the filter also varies depending on factors such as the amount of clothing.

On the other hand, at least in each operation mode for driving the circulation fan, when the circulation fan is set to be driven at a constant individual rotation speed, if the filter becomes clogged, the ventilation resistance increases, and the inside of the bathroom Since the amount of air sucked from the air is reduced, the load on the fan motor for driving the circulation fan is reduced, and the operating current value _Cj is reduced. Therefore, if the current value difference (C _Sj −C _j ) between the initial operation current value C _Sj in the initial state where the filter is not clogged and the current value C _j during operation is higher than a predetermined clogging threshold value α _j , In the operating mode in which the circulation fan is driven, the necessity for filter cleaning can be determined.

  Furthermore, the heating operation mode for driving the circulation fan is performed while filling the bathtub with hot water to warm the bathroom before bathing, or with the hot water being filled in the bathtub for subsequent bathers. Often. In addition, when a large amount of clothing is dried in the drying operation mode or when the clothing is dried in a short time using high-temperature hot air, a large amount of water evaporates from the clothing at the beginning of the operation. Therefore, in these operating environments, the amount of moisture contained in the air increases. Therefore, when each operation mode is executed, water tends to adhere to the filter. As a result, the ventilation resistance is increased, the current value during operation of the circulation fan is lowered, and clogging of the filter may not be accurately determined. However, the comparison of the current value of the circulating fan at the initial stage of operation with the current value during operation is that the relative humidity in the bathroom is less likely to adhere to the filter even if the actual total operating time exceeds the filter cleaning request time. Since it is performed when it is less than, the influence on the current value at the time of operation by adhesion of water is reduced, and the necessity of filter cleaning can be determined more accurately.

Further, the present invention is a bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode,
A filter attached to the air intake of the bathroom;
A circulation fan for circulating air in the bathroom through the filter;
A ventilation fan that exhausts the air in the bathroom to the outside through the filter;
A control unit for determining the necessity of filter cleaning due to clogging of the filter;
An alarm for notifying the necessity of the filter cleaning,
The control unit is
The operation time for each operation mode is multiplied by the operation time for each operation mode multiplied by the filter clogging coefficient specific to each operation mode to obtain the actual total operation time,
During execution of the ventilation operation mode for driving only the ventilation fan, the actual total operation time exceeds a predetermined filter cleaning request time, and the relative humidity in the bathroom is less than a predetermined determinable humidity. If
In the initial state in which the filter is not clogged, the ventilation operation initial current value C _Sk when the ventilation fan is driven at the ventilation rotation speed set in the ventilation operation mode, and the same rotation speed as the ventilation rotation speed When the current value difference (C _Sk −C _k ) with the ventilation operation current value C _k when the ventilation fan is driven is higher than a predetermined ventilation clogging threshold value α _k , the alarm cleaning is performed from the alarm. It is a bathroom heating dryer that informs the necessity of the .

In the ventilation operation mode, unlike the drying operation mode and the heating operation mode, the circulation fan is not driven and only the ventilation fan is driven. Therefore, as in the case of the circulation fan, if the filter becomes clogged, the ventilation resistance increases and the amount of air sucked from the bathroom decreases. Therefore, the load on the fan motor for driving the ventilation fan It decreases, ventilation operation when the current value C _k is decreased. Therefore, according to the above-mentioned bathroom heating dryer, the current value difference (C _Sk −C _k ) between the ventilation operation initial current value C _Sk in the initial state where the filter is not clogged and the ventilation operation current value C _k is If it is higher than the predetermined ventilation clogging threshold value α _k , the necessity for filter cleaning can be determined in the ventilation operation mode in which the ventilation fan is driven.

  Further, the ventilation operation mode is often executed in order to exhaust moisture in the bathroom early after bathing. In the initial stage of the start of the ventilation operation mode executed after bathing, the moisture contained in the air increases, so that the water tends to adhere to the filter. As a result, the ventilation resistance is increased, the current value during ventilation operation of the ventilation fan is lowered, and clogging of the filter may not be accurately determined. However, the comparison of the current value during the initial operation and the operation of the ventilation fan is based on the predetermined determinable humidity at which the relative humidity in the bathroom is difficult for moisture to adhere to the filter even if the actual total operation time exceeds the filter cleaning request time. Since it is performed when it is less than, the influence on the current value at the time of ventilation operation due to the adhesion of water is reduced, and the necessity of filter cleaning can be determined more accurately.

Further, the present invention is a bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode,
A filter attached to the air intake of the bathroom;
A circulation fan for circulating air in the bathroom through the filter;
A ventilation fan that exhausts the air in the bathroom to the outside through the filter;
A control unit for determining the necessity of filter cleaning due to clogging of the filter;
An alarm for notifying the necessity of the filter cleaning,
The control unit is
The operation time for each operation mode is multiplied by the operation time for each operation mode multiplied by the filter clogging coefficient specific to each operation mode to obtain the actual total operation time,
When the substantially total operation time is a predetermined filter cleaning request time or less and the drying operation mode is continuously executed for a predetermined determination possible time or more,
In the initial state in which the filter is not clogged, the drying operation initial current value _CSd when the circulation fan is driven at the drying rotation speed set in the drying operation mode, and the rotation speed same as the drying rotation speed When the current value difference (C _Sd −C _d ) from the dry operation current value C _d when the circulating fan is driven becomes higher than a predetermined drying clogging threshold value α _d , the filter cleaning is performed from the alarm. It is a bathroom heating dryer that informs the necessity of the .

  Since the dry operation mode is executed when the user intends to dry clothes, the filter is more likely to be clogged than other operation modes such as the ventilation operation mode. Therefore, it is desirable to determine clogging of the filter every time the drying operation mode is executed even when the actual total operation time does not exceed the filter cleaning request time.

On the other hand, when the dry operation mode is executed, the circulation fan and the ventilation fan are driven, and air in the bathroom is exhausted to the outside while hot air is supplied into the bathroom. Therefore, if the drying operation mode is continuously executed for a predetermined determination time or longer, the humidity in the bathroom is sufficiently lowered, so that the circulation fan is immediately dried without determining the humidity in the bathroom. By comparing the current value difference (C _Sd −C _d ) between the initial operation current value C _Sd and the current value C _d during the drying operation, it is possible to determine clogging of the filter.

  As described above, according to the present invention, in a bathroom heating / drying machine in which a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode are executed, the filter attached to the air intake port The need for cleaning can be notified more accurately.

FIG. 1 is a schematic cross-sectional view showing an example of a bathroom heater / dryer according to an embodiment of the present invention. FIG. 2 is a control flow diagram illustrating an example of a control operation for notifying the necessity of filter cleaning in the bathroom heater / dryer according to the embodiment of the present invention.

  Hereinafter, the bathroom heating dryer according to the present embodiment will be described in detail with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view showing an example of a bathroom heater / dryer according to an embodiment of the present invention.

  As shown in FIG. 1, a bathroom heating / drying machine 1 according to an embodiment of the present invention includes a heating / drying machine main body 2 installed on the ceiling of a bathroom A and a heat source machine 3 arranged outdoors. It is embedded.

  The heating / drying machine main body 2 has a main body case 20, which is not illustrated, but is installed on the ceiling of the bathroom A, and the circulation fan that circulates the air of the bathroom A in the main body case 20. 41, a heat exchanger 42 for heating or cooling the air flowing through the air flow path formed by the circulation fan 41 using hot water or water, and a ventilation fan 43 for exhausting the air in the bathroom A to the outside. .

  The main body case 20 is partitioned into a first chamber 21 in which the circulation fan 41 and the heat exchanger 42 are disposed, and a second chamber 22 in which the ventilation fan 43 is disposed. The first chamber 21 communicates with the first chamber 21 through the first chamber 21. A damper 25 connected to the stepping motor 24 is provided in the communication path 23. The damper 25 opens and closes the communication path 23 by driving the stepping motor 24.

  Below the circulation fan 41 in the first chamber 21 of the main body case 20, as shown in FIG. 1, an intake port 26 and a blowout port 27 communicating with the bathroom A are opened. A mesh-shaped filter F for removing dust in the air when the air in the bathroom A is taken into the first chamber 21 is detachably disposed above the intake port 26 in the first chamber 21. Has been. Further, an L-shaped heat exchanger 42 is disposed in the first chamber 21 so as to surround the bottom and sides of the circulation fan 41, and adjacent to the lower heat exchanger 42, A humidity sensor 51 that detects humidity and a room temperature sensor 52 that detects the temperature of the bathroom A are provided. The room temperature and humidity detection signals detected by the humidity sensor 51 and the room temperature sensor 52 are output to the control unit C described later.

  The circulation fan 41 is a line flow fan, and the air in the bathroom A is sucked into the main body case 20 from the intake port 26 via the filter F and blown out from the outlet port 27 to the bathroom A by its rotational drive.

  The heat exchanger 42 includes an endothermic tube 42a bent in a meandering manner at both ends, and a large number of fins 42b through which the endothermic tube 42a is inserted. As shown in FIG. It is configured in an L shape so as to be arranged in an L shape.

  Furthermore, a circulation pipe 31 that is a circulation path communicating with the heat source unit 3 installed outdoors or the like is connected to the heat absorption pipe 42 a of the heat exchanger 42. Hot water heated by the heat source device 3 is circulated and supplied to the heat exchanger 42 via the circulation pipe 31.

  A water temperature sensor 53 for detecting the temperature of hot water flowing through the circulation pipe 31 and a thermal valve 34 are provided near the inflow portion of the circulation pipe 31 to the heat exchanger 42. A water temperature detection signal detected by the water temperature sensor 53 is output to the control unit C, and the opening degree of the thermal valve 34 is adjusted by a signal from the control unit C.

  As shown in FIG. 1, an exhaust port 28 is formed in the second chamber 22 of the main body case 20, and a ventilation fan 43 made of a sirocco fan is connected to the exhaust port 28. Therefore, when the damper 25 of the communication passage 23 is rotated by the driving of the stepping motor 24 and the communication passage 23 is opened, the ventilation fan 43 is rotationally driven, so that the inside of the bathroom A through the filter F through the intake port 26. Air is sucked and exhausted from the exhaust port 28 to the outside.

  When the ventilation fan 43 is stopped, the communication path 23 is closed by the damper 25, whereby a part of the air heated in the main body case 20 is exhausted from the exhaust port 28 to the outside. Is prevented.

  The bathroom heating / drying machine 1 according to the present embodiment supplies a cool air to the bathroom A to ventilate the air in the bathroom A in addition to the drying operation mode, the heating operation mode, and the ventilation operation mode as operation modes. In addition to having a mode, the air flow rate can be changed in each operation mode. And the remote control 9 (alarm) provided on the wall surface of the bathroom A, the kitchen, etc. has a drying operation switch 91, a cool air operation switch 92, a heating operation switch 93, a ventilation operation switch 94 for setting each operation mode, Setting switches 95 and 96 for setting operating conditions such as temperature and operating time, and a filter lamp 97 for notifying the necessity of filter cleaning are provided. When the user operates each switch, the control unit C An operation command is issued to each operation mode, and each operation mode is executed under the set operation conditions.

  Although not shown, the control unit C is configured to control the operation of the heat source unit 3, the humidity determination unit that determines the humidity in the bathroom A by the humidity sensor 51, and the room temperature sensor 52 to determine the room temperature in the bathroom A. A room temperature determination unit for determining, a water temperature determination unit for determining the water temperature supplied from the heat source device 3 to the heat exchanger 42 by the water temperature sensor 53, a circulation fan control unit for controlling the rotational drive of the circulation fan 41, and a ventilation fan 43 A ventilation fan control unit for controlling the rotational drive of the motor, a timer unit for measuring an operation time such as a drying time and a heating time set by the remote controller 9, an operation time in each operation mode, and a filter clogging unique to each operation mode The operation time calculation unit that calculates the operation time for each operation mode by multiplying the coefficient, the integration unit that calculates the actual total operation time by integrating the operation time for each operation mode, and the operation that executes each operation mode Each operation mode was executed at a predetermined individual rotational speed in the initial state in which the program and the determination program for determining the necessity of filter cleaning were stored, the filter clogging coefficient, and the filter F were not clogged. Sometimes, a data table of initial operation current values necessary for driving the circulation fan 41 or the ventilation fan 43, a memory for storing the accumulated actual total operation time, the actual total operation time and each operation mode are executed. And a cleaning determination unit for determining the necessity of filter cleaning based on the current value during operation of the circulation fan 41 or the ventilation fan 43 during operation. Electricity not shown for the remote control 9 provided inside and outside the bathroom A Connected through wiring.

  In addition, each operation initial current value of the circulation fan 41 and the ventilation fan 43 in each operation mode may be registered in a memory in advance at the time of factory shipment, or when installing the bathroom heating dryer 1 in the bathroom A, A trial operation for driving the circulation fan 41 and the ventilation fan 43 at a predetermined individual rotational speed may be performed, and each initial operation current value during the trial operation may be measured and registered in the memory. Further, the filter clogging coefficient specific to each operation mode is determined so that the current value during operation of the circulation fan 41 or the ventilation fan 43 is predetermined from the initial operation current value due to clogging of the filter F when each operation mode is executed in the preliminary test. It can be set by comparing and evaluating in advance the time to decrease by more than the current value. For reference, Table 1 shows a filter clogging coefficient used in the bathroom heating dryer 1 of the present embodiment, and the set air flow rate of the circulation fan 41 and the ventilation fan 43.

As shown in Table 1 above, the filter clogging coefficient K _i in the present embodiment is weighted and set in the order of dry operation mode> cool air operation mode ≧ ventilation operation mode> heating operation mode. That is, as described above, the filter clogging coefficient K _i is set to be the highest in the dry operation mode when clothes are arranged in the bathroom A and both the circulation fan 41 and the ventilation fan 43 are in the state. This is because it is driven. In the cool air operation mode, both the circulation fan 41 and the ventilation fan 43 are driven as in the drying operation mode, and therefore the filter clogging coefficient _Ki is set high. Further, in the ventilation operation mode, only the ventilation fan 43 is driven, but when a larger air flow rate is set than in the cool wind operation mode, air is supplied from outside the bathroom A into the bathroom A, so the cool wind operation mode The filter clogging coefficient K _i is set to the same level as that of the filter, and a low filter clogging coefficient K _i is set as the air flow rate decreases. In the heating operation mode, only the circulation fan 41 is driven and it is difficult to supply air from outside the bathroom A, so the lowest filter clogging coefficient K _i is set. Note that different filter clogging factors K _i are used depending on the area of the filter F, the air flow rate of the circulation fan 41 and the ventilation fan 43, the size of the bathroom A, and the like.

  Next, the operation | movement operation | movement of each apparatus when each operation mode is performed with the bathroom heating dryer 1 of this Embodiment is demonstrated concretely.

[Dry operation mode]
When an instruction to start the drying operation is given by the drying operation switch 91 of the remote controller 9, a heat source operation signal is transmitted to the external heat source unit 3, and the heat valve 34 provided on the upstream side of the heat exchanger 42 is opened. Then, circulation of hot water from the heat source unit 3 to the heat exchanger 42 is started.

  Then, the damper 25 is rotated to keep the communication passage 23 open, and the circulation fan 41 and the ventilation fan 43 are driven at each drying rotation speed so as to obtain a predetermined set air flow rate. Then, the air in the bathroom A is led into the main body case 20 through the intake port 26 through the filter F, a part is exhausted to the outside through the communication path 23, and the other part is a heat exchanger. After passing through the arrangement part 42, it is sent out into the bathroom A again.

  In this manner, the air in the bathroom A is exhausted to the outside and the warm air is sent into the bathroom A while being heated by the heat exchanger 42 until the measurement time of the timer unit reaches a predetermined set time. To do.

  When the measurement time of the timer unit reaches the set time, a stop signal is transmitted to the external heat source unit 3 and the thermal valve 34 is closed. Moreover, while stopping the circulation supply of the hot water to the heat exchanger 42, the rotation of the circulation fan 41 and the ventilation fan 43 is stopped, and the drying operation is finished.

[Cool wind operation mode]
When an instruction to start the cool air operation is given by the cool air operation switch 92 of the remote controller 9, the heat source valve 3 is opened on the upstream side of the heat exchanger 42 without operating the heat source unit 3, and the heat exchanger Circulation of water to 42 is started.

  Then, the damper 25 is rotated to hold the communication passage 23 in an open state, and the circulation fan 41 and the ventilation fan 43 are driven at each cool air rotation speed so as to obtain a predetermined set air flow rate. Then, the air in the bathroom A is led into the main body case 20 through the intake port 26, a part is exhausted to the outside through the communication path 23, and the other part is an arrangement part of the heat exchanger 42. Pass through. At this time, since water circulates in the heat exchanger 42, the passing air is cooled, and the low-temperature air is sent out again into the bathroom A.

  In this way, the air in the bathroom A is exhausted to the outdoors and the air is cooled by the heat exchanger 42 and sent as cool air into the bathroom A until the measurement time of the timer unit reaches a predetermined set time. .

  When the measurement time of the timer unit reaches the set time, the thermal valve 34 is closed, the circulation supply of water to the heat exchanger 42 is stopped, the rotation of the circulation fan 41 and the ventilation fan 43 is stopped, and the cool air operation is performed. finish.

[Heating operation mode]
When an instruction to start the heating operation is given by the heating operation switch 93 of the remote controller 9, the damper 25 is rotated and the communication path 23 is kept closed. In addition, a heat source operation signal is transmitted to the external heat source unit 3, and a heat valve 34 provided on the upstream side of the heat exchanger 42 is opened so that hot water is circulated from the heat source unit 3 to the heat exchanger 42. Is started.

  Then, after waiting for the incoming water temperature to the heat exchanger 42 to reach a preset reference incoming water temperature (for example, 40 ° C.), the circulation fan 41 is heated at a rotational speed so as to obtain a predetermined set air flow rate. Driven. Then, the air in the bathroom A is guided into the main body case 20 via the filter F through the intake port 26, passes through the arrangement part of the heat exchanger 42, and is sent out again into the bathroom A.

  In this way, the air in the bathroom A is heated by the heat exchanger 42 until the measurement time of the timer unit reaches a predetermined set time or until the temperature detected by the room temperature sensor 52 becomes higher than the set temperature. While sending out as warm air.

  And supply of the warm water to the heat exchanger 42 is controlled by the opening degree of the thermal valve 34 so that the detected temperature detected by the room temperature sensor 52 becomes the set temperature. When the measurement time of the timer unit reaches a predetermined set time, a stop signal is transmitted to the external heat source unit 3 and the thermal valve 34 is closed. In addition, the circulation of hot water to the heat exchanger 42 is stopped, the rotation of the circulation fan 41 is stopped, and the heating operation is finished.

[Ventilation mode]
When a ventilation operation start instruction is given by the ventilation operation switch 94 of the remote controller 9, the damper 25 is rotated to keep the communication path 23 open, and the ventilation fan 43 can obtain a predetermined set air flow rate. It is driven at the rotational speed for ventilation. Then, since the circulation fan 41 is not driven, the air in the bathroom A is guided to the inside of the main body case 20 through the intake port 26 through the filter F, and further exhausted to the outdoors through the communication path 23. .

  And if the measurement time of a timer part reaches predetermined set time, rotation of the ventilation fan 43 will be stopped and ventilation operation will be complete | finished.

  Next, a control operation for determining that the necessity for filter cleaning has occurred in the bathroom heating dryer 1 will be described in detail with reference to FIG. In the bathroom heating / drying machine 1 of the present embodiment, the filter cleaning determination program is set to start and end in parallel with the execution and end of each operation mode.

  When each operation mode is executed, measurement of each operation current value for driving the circulation fan 41 and the ventilation fan 43 and the relative humidity output from the humidity sensor 51 is started (step ST1).

Next, the filter clogging coefficient K _i of the operation mode being executed is determined from the data table registered in the memory (step ST2), and is filtered to the operation time T _i at a predetermined interval (for example, every minute). By multiplying the clogging coefficient K _i , the operation time for each operation mode (T _i × K _i ) for each predetermined time is calculated (step ST3). Then, the actual total operation time (Σ (T _i × K _i )) obtained by accumulating the past operation times for each operation mode registered in the memory, the current operation time for each operation mode (T _i × K _i ), and And the actual total operation time (Σ (T _i × K _i )) of the memory is updated (step ST4).

  The control unit C determines whether the current actual total operation time stored in the memory exceeds a predetermined filter cleaning request time (for example, 1,000 hours) while each operation mode is executed. (Step ST5). Thereby, the necessity for filter cleaning can be judged based on the operation time in consideration of the difference in the amount of dust adhering to the filter F in each operation mode.

  Next, when the actual total operation time exceeds the filter cleaning request time (Yes in step ST5), the relative humidity in the bathroom A detected by the humidity sensor 51 is a predetermined determinable humidity (for example, 80 % RH) is determined (step ST6). If the relative humidity in the bathroom A detected by the humidity sensor 51 is less than the determinable humidity (Yes in step ST6), the control unit C further executes the operation mode is the ventilation operation mode. Is determined (step ST7).

At this time, when the operation mode being executed is not the ventilation operation mode (No in step ST7), an operation mode for driving at least the circulation fan 41 in the dry operation mode, the cool air operation mode, or the heating operation mode is executed. Therefore, the control unit C determines that the current value difference (C _Sj −C _j ) between the operation initial current value C _Sj of the circulation fan 41 and the operation current value C _j of the circulation fan 41 being executed is a predetermined value. It is determined whether the clogging threshold value α _j (for example, 10 mA in the case of a drying operation) is exceeded (step ST11). That is, in each operation mode for driving the circulation fan 41, when the circulation fan 41 is set to be driven at a constant individual rotation number, when the filter F becomes clogged, the ventilation resistance becomes high, Since the amount of air sucked from the bathroom A is reduced, the load on the fan motor for driving the circulation fan 41 is reduced, and the operating current value _Cj is reduced. Accordingly, if the current value difference (C _Sj −C _j ) between the initial operation current value C _Sj in the initial state where the filter F is not clogged and the operation current value C _j is higher than a predetermined clogging threshold value α _j. In the operation mode in which the circulation fan 41 is driven, the necessity for filter cleaning can be determined.

If the current value difference (C _Sj −C _j ) is higher than the clogging threshold value α _j (Yes in step ST11), the control unit C turns on the filter lamp 97 of the remote controller 9 to let the user perform filter cleaning. The necessity is notified (step ST12). Thereby, in each operation mode in which circulation fan 41 is driven, the necessity for filter cleaning can be judged more accurately. In addition, in the heating operation mode and the drying operation mode for driving the circulation fan 41, depending on the operation environment, the moisture contained in the air in the bathroom A may increase, so when each operation mode is executed, the filter F As a result, the air resistance increases, the current value during operation of the circulation fan 41 decreases, and clogging of the filter F may not be accurately determined. However, the comparison between the initial operation value and the current value during operation of the circulation fan 41 indicates that the relative humidity in the bathroom A is difficult to adhere to the filter F even if the actual total operation time exceeds the filter cleaning request time. Since it is performed when the humidity is lower than the determinable humidity, the influence on the current value during operation due to the adhesion of water is reduced, and the necessity of filter cleaning can be determined even more accurately.

On the other hand, if the operation mode being executed is the ventilation operation mode (Yes in step ST7), the ventilation operation initial current value C _Sk of the ventilation fan 43 and the current value C during ventilation operation of the ventilation fan 43 being executed. current value difference between the _{k (C} Sk -C _k) determines if it exceeds a predetermined ventilation clogging threshold alpha _k (e.g., 5 mA) (step ST8). That is, as in the case of the circulation fan 41, when the filter F becomes clogged significantly, the ventilation resistance increases, and the amount of air sucked from the bathroom A decreases. Therefore, the fan for driving the ventilation fan 43 load of the motor is reduced, ventilation operation when the current value C _k is decreased. Therefore, if the current value difference (C _Sk −C _k ) between the ventilation operation initial current value C _Sk and the ventilation operation current value C _k is equal to or greater than a predetermined ventilation clogging threshold value α _k , the ventilation fan 43 is In the driven ventilation mode, the need for filter cleaning can be determined.

If the current value difference (C _Sk −C _k ) is higher than the ventilation clogging threshold value α _k (Yes in step ST8), the control unit C turns on the filter lamp 97 of the remote controller 9 to filter the user. The necessity of cleaning is notified (step ST12). Thereby, in the ventilation operation mode in which the ventilation fan 43 is driven, the necessity for filter cleaning can be determined more accurately. Moreover, in the ventilation operation mode, depending on the operating environment, the moisture contained in the air in the bathroom A may increase, so when the ventilation operation mode is executed, water adheres to the filter F, and as a result, ventilation As the resistance increases, the current value during operation of the ventilation fan 43 decreases, and clogging of the filter F may not be accurately determined. However, the comparison between the initial operation value and the current value during operation of the ventilation fan 43 shows that the relative humidity in the bathroom A is difficult to adhere to the filter F even if the actual total operation time exceeds the filter cleaning request time. Since it is performed when the humidity is lower than the determinable humidity, the influence on the current value during ventilation operation due to the adhesion of water is reduced, and the necessity of filter cleaning can be determined even more accurately.

  If the actual total operation time is equal to or less than the filter cleaning request time (No in step ST5), it is considered that the filter F is not clogged, but in this embodiment, the drying operation mode is executed. In the case (Yes in step ST9), the necessity of filter cleaning based on the current value of the circulation fan 41 is determined even if the actual total operation time is equal to or shorter than the filter cleaning request time. For example, in the dry operation mode, depending on the type of clothes to be dried, the amount of dust attached to the filter F may increase in a short time, so even if the actual total operation time is less than the filter cleaning request time, It is preferable to determine the need for filter cleaning.

  In this case, first, it is determined whether or not the drying operation mode is continuously executed for a predetermined determination possible time (for example, 30 minutes) (step ST10). That is, since the drying operation mode is intended to dry clothes, it is generally executed in a low humidity state where hot water is not put in a bathtub or the like, but when a large amount of water evaporates from the clothes by the drying operation, There is a possibility that water adheres to the filter F, and as described above, the attachment of such water may increase the airflow resistance, and the current value during the drying operation of the circulation fan 41 may be reduced. However, if the drying operation mode has been executed for a predetermined time or more, it is considered that the amount of water adhering to the filter F is also reduced. Therefore, the filter F can be immediately used without checking the relative humidity in the bathroom A. Can be determined.

If the drying operation mode continues for a predetermined determination time or more (Yes in step ST10), the drying operation initial current value _CSd of the circulation fan 41 and the current during the drying operation of the circulation fan 41 being executed are determined. It is determined whether the current value difference (C _Sd −C _d ) from the value C _d exceeds a predetermined drying clogging threshold value α _d (step ST11). At this time, the drying operation initial current value C _Sd and the drying clogging threshold value α _d are the same values as the operation initial current value C _Sj and the clogging threshold value α _j during the drying operation described above, respectively. .

If the current value difference (C _Sd −C _d ) is higher than the clogging threshold value α _d (Yes in step ST11), the control unit C turns on the filter lamp 97 of the remote controller 9 to let the user perform filter cleaning. The necessity is notified (step ST12). Thereby, in the dry operation mode, the necessity for filter cleaning can be determined even more accurately.

  Determination of the necessity for the filter cleaning is performed until each operation mode is completed (step ST13). Therefore, while the operation mode is being executed, the actual total operation time is updated, and when the next operation mode is executed, it is used as the actual total operation time obtained by accumulating the past operation time for each operation mode. When the user recognizes that the filter lamp 97 is turned on and performs filter cleaning, operating the reset switch (not shown) of the remote control 9 resets the past substantial total operating time in the memory, and after the filter cleaning The actual total operation time is newly stored.

(Other embodiments)
(1) The bathroom heater / dryer of the above embodiment may further have a mist operation mode for driving only the circulation fan as the operation mode. That is, when the mist operation mode is executed, mist is sprayed in the bathroom, but tap water is used to generate mist, so that minerals in tap water are condensed when the mist and the filter come into contact with each other. May become clogged. Therefore, the present invention is preferably used also in a bathroom heater / dryer in which a mist operation is performed. The filter clogging coefficient K _i in the mist operation mode is preferably set between the ventilation operation mode and the heating operation mode, although it depends on the operation environment. When the mist operation is performed, the amount of water adhering to the filter increases, so it is preferable to determine the necessity of filter cleaning only from the substantially total operation time.

(2) In the above embodiment, when the actual total operation time is obtained, the operation time for each operation mode obtained by multiplying the operation time for each predetermined time in each operation mode by the filter clogging coefficient is integrated. After the operation is executed, the operation time for each operation mode obtained by multiplying the total operation time executed by the filter clogging coefficient may be integrated to obtain the actual total operation time.

1 Bathroom heater / dryer 9 Remote control (notifier)
26 Intake port 41 Circulating fan 4 3 Ventilation fan A Bathroom C Control unit F Filter

Claims (3)

A bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode,
A filter attached to the air intake of the bathroom;
A circulation fan for circulating air in the bathroom through the filter;
A ventilation fan that exhausts the air in the bathroom to the outside through the filter;
A control unit for determining the necessity of filter cleaning due to clogging of the filter;
An alarm for notifying the necessity of the filter cleaning,
The control unit is
The operation time for each operation mode is multiplied by the operation time for each operation mode multiplied by the filter clogging coefficient specific to each operation mode to obtain the actual total operation time,
Among the plurality of operation modes, during execution of at least the operation mode for driving the circulation fan, the substantial total operation time exceeds a predetermined filter cleaning request time, and the relative humidity in the bathroom is predetermined. If the humidity is less than
In an initial state where the filter is not clogged, an initial operation current value _CSj when the circulation fan is driven at the individual rotation speed set in each operation mode, and the circulation at the same rotation speed as the individual rotation speed. When the current value difference (C _Sj −C _j ) from the operating current value C _j when the fan is driven becomes higher than a predetermined clogging threshold value α _j , the necessity for the filter cleaning is notified from the notification device. Bathroom heating dryer. A bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode,
A filter attached to the air intake of the bathroom;
A circulation fan for circulating air in the bathroom through the filter;
A ventilation fan that exhausts the air in the bathroom to the outside through the filter;
A control unit for determining the necessity of filter cleaning due to clogging of the filter;
An alarm for notifying the necessity of the filter cleaning,
The control unit is
The operation time for each operation mode is multiplied by the operation time for each operation mode multiplied by the filter clogging coefficient specific to each operation mode to obtain the actual total operation time,
During execution of the ventilation operation mode for driving only the ventilation fan, the actual total operation time exceeds a predetermined filter cleaning request time, and the relative humidity in the bathroom is less than a predetermined determinable humidity. In case,
In an initial state where the filter is not clogged, an initial current value C of the ventilation operation when the ventilation fan is driven at a ventilation rotational speed set in the ventilation operation mode. _Sk And the current value C during ventilation operation when the ventilation fan is driven at the same rotational speed as the ventilation rotational speed. _k Current value difference (C _Sk -C _k ) Is the predetermined ventilation clogging threshold α _k When it becomes higher, the bathroom heating dryer notifies the necessity of the filter cleaning from the alarm. A bathroom heating dryer having a plurality of different operation modes such as a drying operation mode, a heating operation mode, and a ventilation operation mode,
A filter attached to the air intake of the bathroom;
A circulation fan for circulating air in the bathroom through the filter;
A ventilation fan that exhausts the air in the bathroom to the outside through the filter;
A control unit for determining the necessity of filter cleaning due to clogging of the filter;
An alarm for notifying the necessity of the filter cleaning,
The control unit is
The operation time for each operation mode is multiplied by the operation time for each operation mode multiplied by the filter clogging coefficient specific to each operation mode to obtain the actual total operation time,
When the substantially total operation time is not more than a predetermined filter cleaning request time and the drying operation mode is continuously executed for a predetermined determination possible time or longer,
In the initial state where the filter is not clogged, the drying operation initial current value C when the circulation fan is driven at the drying rotational speed set in the drying operation mode. _Sd And a current value C during drying operation when the circulation fan is driven at the same rotational speed as the rotational speed for drying. _d Current value difference (C _Sd -C _d ) Is a predetermined drying clogging threshold α _d When it becomes higher, the bathroom heating dryer notifies the necessity of the filter cleaning from the alarm.

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