JP6247941B2 - Bathroom heating dryer - Google Patents

Description

  The present invention relates to a bathroom heater / dryer used for heating and ventilation in a bathroom.

  The bathroom heater / dryer has its main body attached to the ceiling of the bathroom, etc., but the main body is equipped with a fan for ventilation and circulation of air in the bathroom, and is generated by the rotation of these fans. There has been proposed a bathroom heating / drying machine that reduces the propagation of vibrations to the ceiling surface of the bathroom and reduces variations in vibration propagation due to construction (for example, see Patent Document 1).

  In this patent document 1, the bathroom heating / drying machine main body is put into the opening of the bathroom ceiling surface from below, and the bathroom heating / drying machine main body is fixed in a state where the flange of the bathroom heating / drying machine main body is not in contact with the bathroom ceiling surface. By sealing the bathroom ceiling surface and flange after fixing the bathroom heating dryer body, the vibration generated by the rotation of the circulation fan of the bathroom heating dryer body propagates to the bathroom ceiling surface. To reduce fluctuations in vibration propagation.

JP 2007-322072 A

  As in Patent Document 1, even if the bathroom ceiling surface and the bathroom heating / drying machine main body are sealed with a sealing material, the frequency of the bathroom heating / drying machine main body due to rotation of the fan and the bathroom ceiling surface including the sealing material When the natural frequency of a structure such as the same coincides with each other, it resonates and generates a loud operating sound (fan rotation sound).

  In general, a bathroom heater / dryer is often installed in a unit bath. There are various types of unit baths, and when bathroom heater / dryers are installed in these unit baths and the fan of the bathroom heater / dryer rotates, vibrations generated in the fans are installed in the bathroom heater / dryer. The characteristics of propagation to the unit bath and the vibrations propagated to the unit bath are amplified or attenuated in the unit bath. The vibration characteristics of the unit bath include the type of unit bath in which the bathroom heating dryer is installed and the installation status of the unit bath. It depends on.

  Therefore, in patent document 1 which seals a bathroom ceiling surface and a bathroom heating dryer main body using a sealing material, when installing a bathroom heating dryer in a bathroom where vibration characteristics differ variously like a unit bath. It is difficult to effectively suppress the loud driving sound due to resonance.

  The present invention has been made paying attention to such a situation, and when resonance occurs due to the rotation of the fan of the bathroom heater / dryer, the resonance state is canceled and a loud driving sound is generated. The purpose is to prevent.

  In order to achieve the above object, the present invention is configured as follows.

(1) The bathroom heating dryer of the present invention includes a ventilation fan that ventilates the air in the bathroom, a circulation fan that circulates the air in the bathroom, and a heating means that heats the circulated air.
While operating the ventilation fan and the circulation fan, hot air drying operation for heating the air by the heating means;
A ventilation drying operation that operates the ventilation fan and the circulation fan and does not heat the air by the heating means;
In the bathroom heating / drying machine capable of operating the circulation fan and heating the air by the heating means without operating the ventilation fan,
In response to the operation, a rotation speed change process command means for outputting a start command and a completion command of the fan speed change process,
Control means for controlling the rotational speed of at least one of the ventilation fan and the circulation fan based on a start command and a completion command of the rotational speed change process input from the rotational speed change process command means; Prepared,
When the start command for the rotation speed change process is input during execution of the hot air drying operation or the air blowing drying operation, the control means is configured to control one of the ventilation fan and the circulation fan. When the rotational speed is changed to a first predetermined rotational speed, and the rotational speed of the one fan is changed to the first predetermined rotational speed, and the rotation speed changing process start command is input again, the ventilation fan and The rotational speed of the other fan among the circulation fans is changed to a second predetermined rotational speed.

  The first predetermined rotational speed and the second predetermined rotational speed may be the same rotational speed or different rotational speeds.

  According to the present invention, when a warm air drying operation or a ventilation drying operation in which both a ventilation fan and a circulation fan are operated is performed, a resonance caused by the rotation of the fan occurs and the operation sound becomes loud. For example, a maintenance engineer who performs maintenance of the bathroom heating / drying machine that has been confirmed operates the rotation speed change processing command means and gives a start command for the rotation speed change process to the control means. In response to the start command, the control means changes the rotation speed of one of the ventilation fan and the circulation fan to a first predetermined rotation speed, thereby causing resonance caused by the rotation of the one fan. In such a case, the resonance state is canceled and the driving sound is reduced.

  Further, if the resonance state is not resolved even if the rotation speed of the one fan is changed to the first predetermined rotation speed, and the operation sound does not decrease, for example, the maintenance engineer operates the rotation speed change processing command means. Then, the rotational speed changing process start command is given again to the control means. In response to the re-start command, the control means sets the rotation speed of the other fan as the second rotation on the assumption that the resonance is caused by the rotation of the other fan, not the resonance caused by the rotation of the one fan. The resonance state is canceled by changing the predetermined rotational speed.

  In this way, when resonance occurs and the operation noise increases during the execution of the warm air drying operation or the air drying operation, by operating the rotation speed change processing command means by a maintenance engineer or the like who has visually confirmed the large operation sound. Since the rotation speed of at least one of the ventilation fan and the circulation fan can be shifted from the rotation speed range where resonance occurs by changing the rotation speed by a predetermined rotation speed, the resonance state is eliminated and the operation sound is reduced. Can do.

  In particular, the bathroom heater / dryer is installed in various bathrooms with different vibration characteristics, such as a unit bath, so the resonance frequency varies depending on the type of bathroom and the situation of installation, and resonance tends to occur. Even if resonance occurs and the driving sound increases, the resonance state can be canceled and the driving sound can be reduced.

  In addition, the maintenance engineer confirms that the resonance has occurred and the driving sound has become louder by his / her hearing, and controls the start command for the fan speed change processing by operating the speed change processing command means. Therefore, it is not necessary to provide a sensor or the like for detecting whether or not resonance has occurred, and the cost can be reduced accordingly.

(2) In a preferred embodiment of the present invention, the control means has a storage unit,
The control means, after changing the rotation speed of the one fan, after the first predetermined rotation speed is changed, when the completion command for the rotation speed change process is inputted, Memorize | stored in the said memory | storage part as a rotation speed after change for this one fan,
After the rotation speed of the other fan is changed to the second predetermined rotation speed and the completion command for the rotation speed change process is input, the rotation speed of the other fan after the change is set for the other fan. Is stored in the storage unit as the number of rotations after the change,
When the rotation speed after change is stored in the storage section, the control means stores the rotation speed of the fan in the storage section when the hot air drying operation or the air blowing drying operation is executed. Control the speed after change for the corresponding fan.

  According to this embodiment, by changing the rotation speed of one fan to the first predetermined rotation speed, when the resonance state is canceled and the driving sound is reduced, it is confirmed by hearing that the driving sound is reduced. A maintenance engineer or the like operates the rotation speed change process command means and gives a completion command for the rotation speed change process to the control means. In response to the completion command, the control means stores the changed rotational speed in the storage unit as the changed rotational speed for one fan.

  In addition, when the rotational speed of the other fan is changed to the second predetermined rotational speed, when the resonance state is eliminated and the driving sound is reduced, a maintenance engineer who has confirmed by hearing that the driving sound has decreased. However, the rotation speed change process command means is operated to give a completion command for the rotation speed change process to the control means. In response to the completion command, the control means stores the changed rotational speed in the storage unit as the changed rotational speed for the other fan.

  When the post-change rotational speed for each fan is stored in the storage unit, the control means stores the rotational speed of the fan at the time of executing the hot air drying operation or the air blowing drying operation. Therefore, it is possible to prevent the generation of resonance and the generation of a loud driving sound during the next and subsequent operations.

  (3) In still another embodiment of the present invention, the change in the first predetermined rotation speed of the one fan and the change in the second predetermined rotation speed of the other fan both increase the rotation speed. It is a change to make.

  According to this embodiment, since the rotation speed of the ventilation fan and the circulation fan is increased, the ventilation airflow and the circulation airflow are increased, but it is only necessary to increase the rotation speed so as to be shifted from the rotation speed at which resonance occurs. The increase in air volume is relatively small, and the warm air drying operation is generally used for drying bathrooms and clothes after taking a bath. The air drying operation is also used as a cool breeze mode mainly to obtain a cool breeze feeling during bathing in the summer, so that even if the air volume is slightly increased, inconvenience does not occur, and even when ventilation is performed, Even if the air volume is increased slightly, problems are unlikely to occur.

(4) In another embodiment of the present invention, it comprises setting means capable of setting the number of rotations of the circulation fan in the heating operation in a plurality of stages,
The control means controls the rotational speed of the circulation fan based on the setting of the setting means,
The control means is configured to issue an instruction to start the rotation speed change process during execution of the heating operation in a state where the rotation speed of the circulation fan is set to the rotation speed of the lowest stage among the plurality of stages. When input, the rotational speed of the circulation fan is decreased by a third predetermined rotational speed, and the rotational speed changing process is started during the heating operation in a state where the rotational speed is set to a speed other than the lowest stage. When the command is input, the rotational speed of the circulation fan is increased by a fourth predetermined rotational speed.

  The third predetermined rotational speed may be the same rotational speed as the fourth predetermined rotational speed, or may be a different rotational speed. Further, these rotational speeds may be the same rotational speed as the first predetermined rotational speed or the second predetermined rotational speed, or may be different rotational speeds.

  In the setting means, the amount of warm air in the heating operation, that is, the number of rotations of the circulation fan can be set in a plurality of stages, for example, “strong” and “weak”. In general, “strong” It is used for preheating to warm the bathroom before bathing, and “weak” is mainly used for heating during bathing.

  According to this embodiment, when the heating operation in which only the circulation fan is operated to heat the circulation air is performed, the resonance is generated due to the rotation of the fan, and the operation noise is increased. A maintenance engineer who has confirmed the above by operating the rotation speed change processing command means gives a start command of the rotation speed change process to the control means. In response to the start command, the control means determines that the resonance is caused by the rotation of the circulation fan, and reduces the rotation speed of the circulation fan by a third predetermined number of times according to the setting state of the heating operation by the setting means, or Since the fourth predetermined number of rotations is increased, the resonance state caused by the circulation fan can be eliminated and the operation sound can be reduced.

  In addition, the rotation speed of the circulation fan is the lowest among the plurality of stages that can be set by the setting means, for example, heating operation in a state set to “weak”, mainly used for heating during bathing. During the heating operation, the rotation speed of the circulation fan is decreased, so that the air volume that hits the wet skin of the user in the bathroom increases, as in the case of increasing the rotation speed and increasing the air volume. I don't feel chilly. In addition, during a heating operation in which the rotation speed of the circulation fan is set to a stage other than the lowest stage, for example, a heating operation in a state set to “strong”, mainly used for preheating to warm the bathroom before bathing Since the rotation speed of the circulation fan is increased, there is no problem in the preliminary heating for heating the bathroom.

  (5) In another embodiment of the present invention, when the rotation speed of the other fan is not input after the rotation speed of the other fan is changed after the second predetermined rotation speed is changed, The rotational speed of at least one of the one fan and the other fan is further changed.

  Further change of the fan speed may be performed in the same manner as in (1) above. That is, even if the speed of the one fan is further changed to a predetermined speed, and the change is made, the operation sound is not reduced. When the completion command for the rotation speed changing process is not given, the rotation speed of the other fan may be repeated such as changing the predetermined rotation speed. In this case, the rotation speed to be changed is It may be different.

  According to this embodiment, even if the rotation speed of the fan is changed, the resonance state is not eliminated and the operation sound is not reduced. Therefore, when the completion command for the rotation speed change process is not given, the rotation speed of the fan is again set. The resonance state can be eliminated by changing.

  According to the present invention, when a resonance occurs and the operation noise is loud during operation of the bathroom heater / dryer, a maintenance engineer who has confirmed by hearing that the operation sound has increased is a rotation speed change processing command means. By operating the, the rotational speed of the fan is shifted from the rotational speed region where the predetermined rotational speed is changed and resonance occurs, so that the resonance state can be eliminated and the operation can be reduced.

It is a perspective view which shows the installation state of the bathroom heating dryer of one Embodiment of this invention. It is a pipe line figure explaining piping inside the bathroom heating dryer of FIG. It is sectional drawing of the bathroom heating dryer of FIG. It is a front view of the operating device for dressing rooms. It is a front view of the operating device for bathrooms. It is a block diagram which shows the structure of the control system of a bathroom heating dryer.

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

  FIG. 1 is a perspective view showing an installation state of a bathroom heating dryer according to an embodiment of the present invention.

  The bathroom heater / dryer 1 is installed on the ceiling 4 above the bathtub 3 of the bathroom 2 such as a unit bath. The bathroom heating / drying machine 1 of this embodiment is a bathroom heating / drying machine with a mist function. Heating in the bathroom 2, ventilation in the bathroom 2, drying in the bathroom 2, and drying of laundry dried in the bathroom 2. It has a function of executing cool air blowing into the bathroom 2, a mist bath for spraying hot water mist in the bathroom 2, and a mist sauna bath for spraying hot water in the bathroom 2 and blowing out hot air.

  The main body 5 of the bathroom heater / dryer 1 is disposed behind the ceiling and supported by a ceiling slab or the like by a hanging metal fitting 6, and the lower surface of the main body 5 faces the opening 7 of the ceiling 4 of the bathroom 2. A grill plate 20 (see FIG. 3) that covers the opening 7 is disposed on the lower surface of the ceiling 4. The grill plate 20 is attached to the lower surface side of the main body 5, and the outer peripheral edge of the grill plate 20 is on the ceiling 4. It is in a contact state.

  Hot water is supplied to the main body 5 of the bathroom heater / dryer 1 from an outdoor heat source unit 8 such as a hot water heater.

  The bathroom heater / dryer 1 is operated by remote control by a dressing room operator 9 provided in a dressing room outside the bathroom 2 or a bathroom operator 10 provided in the bathroom 2.

  2 is a pipe diagram for explaining the piping inside the bathroom heating dryer 1 of FIG. 1, and FIG. 3 is a cross-sectional view of the bathroom heating dryer 1 of FIG. 1, corresponding to FIG. Parts are given the same reference numerals.

  As shown in FIG. 2, a hot air heat exchanger 11 and a circulation fan 12 are provided inside the main body 5 as heating means for heating air. The hot air heat exchanger 11 heats air by exchanging heat between the air flowing outside by passing hot water through the inside, that is, the air sent into the bathroom 2 and the hot water. The heat exchanger 11 is arranged in the middle of a heating hot water pipe 13 piped to the main body 5, and hot water is supplied to the heating hot water pipe 13 from a heat source device 8 such as a hot water heater. The heating hot water pipeline 13 is provided with a thermal valve 14 that opens and closes the supply of hot water to the hot air heat exchanger 11, and the heating hot water pipeline 13 has a temperature of hot water flowing through the pipeline. A heating hot water thermistor 15 for detecting the above is disposed.

  As shown in FIG. 3, the main body 5 of the bathroom heater / dryer 1 is provided with the circulation fan 12 that circulates the air in the bathroom and the ventilation fan 16 that discharges the air in the bathroom to the outside. In FIG. 3, the back wind stop 17 of the ventilation fan 16 is shown.

  Moreover, the lower surface side of the main body 5 is provided with a blowout port 18 for blowing out the air blown by the circulation fan 12 into the bathroom, and a movable louver 19 is rotatably attached to the blowout port 18. By rotating the movable louver 19, the air outlet 18 can be opened and closed and the direction of the air blown out from the air outlet 18 can be changed. The grill plate 20 is provided with a suction port 21 for sucking air into the bathroom 2, and a bathroom temperature thermistor 22 is disposed in the vicinity of the suction port 21.

  The bathroom heater / dryer 1 incorporates a mist generator 23 in order to provide a mist bath function. The mist nozzle 24 for spraying mist from the mist generating unit 23 is disposed in a part of the grill plate 20, and the mist water supply conduit 25 communicates with the mist nozzle 24. As shown in FIG. 2, there are two mist nozzles 24a and 24b as the mist nozzle 24, and each mist nozzle 24a and 24b sprays a mist of hot water at a flow rate of about 0.5 liter / min.

  In front of the mist nozzles 24a and 24b, mist opening and closing valves 26a and 26b configured by electromagnetic valves or the like are provided, and hot water is selectively supplied from the mist nozzle 24a and the mist nozzle 24b by opening and closing the mist opening and closing valves 26a and 26b. Of mist is sprayed. When the mist of warm water is sprayed from the two mist nozzles 24a and 24b, the mist is sprayed with a "strong" mist amount, and when the mist of warm water is sprayed from one mist nozzle 24a or mist nozzle 24b, the spray is sprayed with a "weak" mist amount. Configured to do. In the case of this example, the mist generating part 23 is mounted on the main body 5.

  The water supply pipe 25 for mist is supplied with tap water, so-called tap water, and is provided with a strainer 27 and a water supply electromagnetic valve 28 in order from the inlet side. The heating hot water conduit 13 is provided with a mist heating conduit 29 in parallel with the hot air heat exchanger 11, and the mist heating conduit 29 is connected to the mist heating conduit 29. Is provided with a proportional valve 30 for controlling the flow of hot water. A mist heat exchanger 31 composed of a liquid-liquid heat exchanger is disposed between the mist heating conduit 29 and the mist feed water conduit 25, and the mist heating conduit 29 is connected to the mist heating conduit 29. The water for mist flowing through the water supply pipe 25 for mist is heated by the flowing hot water. A mist temperature thermistor 32 for detecting the temperature of the hot water flowing through the mist supply pipe 25 is disposed between the mist heat exchanger 31 and the mist opening / closing valves 26a and 26b in the mist supply pipe 25. .

  As shown in FIG. 4, the dressing room controller 9 includes a timer display 33, a timer setting switch 34, a wind direction switch 35, a mist sauna switch 36, a drying switch 37, a heating switch 38, a cool air switch 39, and a ventilation switch 40. A stop switch 41 is provided.

  As shown in FIG. 5, the bathroom operating unit 10 includes a state display unit 42, a mist sauna switch 43, a mist switch 44, a temperature setting switch 45, a heating switch 46, a cool air switch 47, a wind direction switch 48, and a mist bathing time measurement. A stopwatch start / stop switch 49, a reset switch 50, and a stop switch 51 are provided. Each operation device 9, 10 has a function as a setting means for setting each operation, air volume, and the like. Moreover, in this embodiment, the operating device 10 for bathrooms has a function as a rotation speed change process command means mentioned later.

  FIG. 6 is a block diagram illustrating a configuration example of a control system of the bathroom heater / dryer 1.

  The bathroom heater / dryer 1 includes a control unit 54 serving as a control unit including a memory 52 and an arithmetic circuit 53.

  The controller 54 performs the following control by operating the controller 9 and the controller 10 by remote control.

  The control unit 54 controls the ventilation operation of the circulation fan 12 that is rotationally driven by the circulation motor and the ventilation fan 16 that is rotationally driven by the ventilation motor based on commands from the operation unit 9 and the operation unit 10. Drying operation in the bathroom 2 (hot air drying operation), cool air operation in which the air in the bathroom 2 is circulated and ventilated (air blowing drying operation), heating operation in which the bathroom 2 is heated, and normal operation in the bathroom 2 Various operations such as a normal ventilation operation in which ventilation is performed at a set ventilation amount and a 24-hour ventilation operation in which ventilation in the bathroom 2 is performed at a set ventilation amount for 24 hours are performed.

  As shown in FIGS. 4 and 5, the undressing room controller 9 and the bathroom controller 10 are provided with a drying operation switch 37 for instructing a drying operation (warm air drying operation) and a cool air operation (air blowing drying operation). There are provided cool air operation switches 39 and 47 for instructing, heating operation switches 38 and 46 for instructing heating operation, a ventilation operation switch 40 for instructing normal ventilation operation, a timer display unit 33, and the like. Every time the normal ventilation operation switch 40 is pressed, the operation is switched to “Ventilation strong” or “Ventilation weak”.

  Further, by pressing and operating the ventilation operation switch 40 for 3 seconds or more, the operation is switched to “24 hour ventilation” in which the ventilation operation is performed for 24 hours.

  Each operation is stopped by pressing the stop switch 41, but the 24-hour ventilation operation is not stopped even if the stop switch 41 is pressed. During the 24-hour ventilation operation, the ventilation operation switch 40 is pressed for 3 seconds or longer to stop the 24-hour ventilation operation.

  In the drying operation (warm air drying operation), the circulation fan 12 is operated, and the opening and closing of the thermal valve 14 is controlled so that the temperature in the bathroom 2 is maintained within the set temperature range for drying. The hot air is circulated and supplied to the heat exchanger 11 and the ventilation fan 16 is operated so as to obtain the set air volume, and a part of the air sucked from the bathroom 2 is exhausted to the outside through the exhaust duct. The circulating air heated by the industrial heat exchanger 11 is blown out into the bathroom 2 from the outlet 18.

  In the cool air operation (air-drying operation), the circulation fan 12 is operated and the ventilation fan 16 is operated so as to achieve the set air volume, and a part of the air sucked from the bathroom 2 is sucked out while being discharged outside. Circulating air sucked from the mouth 21 is blown out from the outlet 18 into the bathroom 2.

  In the heating operation, the circulation fan 12 is operated with the ventilation fan 16 stopped, and the opening and closing of the thermal valve 14 is controlled so that the temperature in the bathroom 2 is maintained within the set temperature range for heating. Then, hot water is circulated and supplied to the hot air heat exchanger 11, the entire amount of air sucked from the bathroom 2 is heated by the hot air heat exchanger 11, and the heated circulating air is discharged from the outlet 18 into the bathroom. 2 is blown out.

  In the normal ventilation operation, the ventilation fan 16 is operated so that the normal set ventilation amount is obtained, and the air sucked from the bathroom 2 is ventilated.

  In the 24-hour ventilation operation, the ventilation fan 16 is operated so as to have a set ventilation amount for 24 hours, and the air sucked from the bathroom 2 is ventilated to continuously ventilate for 24 hours.

  Since the bathroom heater / dryer 1 is installed in various bathrooms having different vibration characteristics such as a unit bath, depending on the type and installation situation of the bathroom, the circulation fan 12 and the ventilation fan 16 of the bathroom heater / dryer 1 are rotated. It is conceivable that the generated frequency resonates close to or coincides with the natural frequency of the structure such as the bathroom ceiling 4 to generate a large driving sound.

  In the bathroom heating / drying machine 1 of this embodiment, when a large operating sound is generated due to resonance caused by the rotation of the circulation fan 12 or the ventilation fan 16, generation of the large operating sound is prevented by preventing the resonance from occurring. Therefore, the configuration is as follows.

  For example, when the user feels that the resonance is generated and the operation sound is loud during the operation of the bathroom heater / dryer 1, the user requests maintenance from the service maintenance company. In order to prevent resonance from occurring, follow the procedure described above.

  That is, the maintenance engineer operates the bathroom heater / dryer 1 and confirms by hearing that the resonance is generated and the operation sound is loud. Then, the maintenance engineer operates the bathroom operating device 10 as the rotation speed change processing command means to control the operation. An instruction to start fan speed change processing is given to the unit 54.

  Here, in the case where the resonance is generated during the hot air drying operation or the air blowing drying operation in which both the circulation fan 12 and the ventilation fan 16 are operated, and the operation sound becomes loud, and the circulation fan 12 is operated without operating the ventilation fan 16. A description will be given of a case where resonance occurs during the heating operation to be activated and the operation sound increases.

  First, a description will be given of a case where resonance occurs during the hot air drying operation or the blower drying operation in which both the circulation fan 12 and the ventilation fan 16 are operated and the operation sound becomes loud.

  When the maintenance engineer confirms by hearing that the operation sound is loud during the hot air drying operation or the blow drying operation of the bathroom heating dryer 1, the maintenance engineer operates the bathroom operation device 10 as described above, An instruction to start fan rotation speed change processing is given to the control unit 54. In this embodiment, the start command operation is, for example, an operation of pressing the start / stop switch 49 while simultaneously pressing the heating switch 46 and the cool air switch 47 of the bathroom operating device 10 of FIG.

  In response to the rotation speed change process start command, the control unit 54 increases the rotation speed of the circulation fan 12, which is one of the circulation fan 12 and the ventilation fan 16, by the first predetermined rotation speed HK1. . The first predetermined rotational speed HK1 is, for example, a rotational speed of several percent, for example, 2%, of the set rotational speed of the circulation fan 12 before the rotational speed changing process is executed. If the set rotational speed of the circulation fan 12 before the rotational speed changing process is 1500 rpm, for example, it is increased by 30 rpm and changed to 1530 rpm. Note that the first predetermined rotation speed HK1 is not limited to the above-mentioned number%, and may be more than that.

  After the operation for starting the rotation speed changing process for increasing the rotation speed of the circulation fan 12 by the first predetermined rotation speed HK1, the maintenance engineer confirms that the driving sound is reduced by hearing, and the resonance state is When it is determined that the problem has been resolved, the operator 10 for bathroom is operated to give a completion command for the fan speed changing process to the control unit 54. In this embodiment, the completion command operation is, for example, an operation of pressing the stop switch 51 while simultaneously pressing the heating switch 46 and the cool air switch 47 of the bathroom operating device 10 of FIG.

  In response to the completion command for the rotation speed change process, the control section 54 sets the above-described 1530 rpm, which is the rotation speed after the change of the circulation fan 12 after being increased by the first predetermined rotation speed HK1, as the set rotation speed. 54, and the rotational speed of the circulation fan 12 is controlled to 1530 rpm which is the changed rotational speed stored in the memory 52 when the hot air drying operation or the air blowing drying operation is executed next time. Drive. Thereby, in the operation after the next time, resonance caused by the rotation of the circulation fan 12 can be prevented.

  On the other hand, despite operating the bathroom controller 10 and giving a start command for the rotation speed change process, the maintenance engineer visually confirms that the driving sound is not reduced, and the resonance state is When it is determined that it has not been eliminated, the operation for the start command is again performed on the bathroom operating device 10, and the start command for the fan rotation speed changing process is again given to the control unit 54.

  When the controller 54 increases the rotation speed of the circulation fan 12 by the first predetermined rotation speed HK1 and then receives the rotation speed change process start command again from the bathroom operating device 10, the control section 54 results from the circulation fan 12. Assuming that there is no resonance, the rotational speed of the ventilation fan 16 as the other fan is increased by the second predetermined rotational speed HK2. The second predetermined rotational speed HK2 is, for example, a rotational speed of several percent, for example, 2%, of the set rotational speed of the ventilation fan 16 before execution of the rotational speed changing process. If the set rotational speed of the ventilation fan 16 before the rotational speed changing process is 1800 rpm, for example, it is increased by 36 rpm and changed to 1836 rpm. Note that the second predetermined rotational speed HK2 is not limited to the above-mentioned number%, and may be more than that.

  When the rotation speed of the ventilation fan 16 is increased by the second predetermined rotation speed HK2 and the maintenance engineer confirms that the driving sound has been reduced by hearing and determines that the resonance state has been resolved, The operation for the completion command is performed on the operation device 10 and the control unit 54 is given a completion command for the fan rotation speed changing process.

  In response to the completion command for the rotation speed change process, the control section 54 sets the above-described 1836 rpm, which is the rotation speed after the change of the ventilation fan 16 after being increased by the second predetermined rotation speed HK2, as the set rotation speed. 54, and the rotational speed of the ventilation fan 16 is controlled to 1836 rpm, which is the changed rotational speed stored in the memory 52, when the next hot air drying operation or air blowing drying operation is executed next time. Drive. Thereby, in the operation after the next time, resonance caused by the rotation of the ventilation fan 16 can be prevented.

  In this way, even if the bathroom 2 such as a unit bath in which the bathroom heater / dryer 1 is installed resonates due to vibration caused by the rotation of either the ventilation fan 16 or the circulation fan 12, the maintenance sound is increased. By executing the above rotation speed changing process in response to the start command by the engineer, the rotation speed of the ventilation fan 16 or the circulation fan 12 is deviated from the rotation speed causing the resonance. Sound can be reduced.

  In addition, when resonance due to the rotation of the fan occurs and the operation sound is loud, the start command of the rotation speed changing process is given to the control unit 54 by the operation by the maintenance engineer, while the change of the rotation speed of the fan When the resonance state is canceled and the driving sound is reduced, the completion of the rotation speed change process is also given to the control unit 54 by an operation by a maintenance engineer or the like, so that the occurrence of resonance or the cancellation of resonance is detected. For example, it is not necessary to provide a sensor for detecting the presence or absence of resonance by vibration, and the cost can be reduced accordingly.

  Note that after the control unit 54 executes the above-described rotation speed changing process to increase the rotation speed of the circulation fan 12 by the first predetermined rotation speed HK1, the rotation speed of the ventilation fan 16 is further increased to the second predetermined rotation speed HK1. Even if the rotation speed HK2 is increased, when the maintenance engineer visually confirms that the driving sound is not reduced and determines that the resonance state has not been eliminated, the above-described rotation speed changing process is repeated. Then, an operation for start command is performed on the bathroom operating device 10, a start command for fan speed change processing is further given to the control unit 54, and the speed of the circulation fan 12 is further changed by a predetermined speed. When the operation sound does not decrease, the operation for start command is performed on the bathroom operating device 10, the start command for the fan rotation speed changing process is further given to the control unit 54, and the rotation speed of the ventilation fan 16 is further increased. It may be repeated as such to change a constant rotational speed, in this case, may have different predetermined rotational speed to change the first time change.

  Alternatively, after the control unit 54 executes the above-described rotation speed changing process to increase the rotation speed of the circulation fan 12 by the first predetermined rotation speed HK1, the rotation speed of the ventilation fan 16 is further increased to the second predetermined rotation speed. Even if the rotational speed HK2 is increased, if the resonance state is not resolved and the completion command for the rotational speed change process is not given, the fact that the operation sound may be loud due to a cause other than the resonance is for the bathroom. You may alert | report with the operating device 10. FIG.

  In the present embodiment, the first predetermined rotational speed HK1 and the second predetermined rotational speed HK2 when the rotational speed changing process is executed during the hot air drying operation or the air blowing drying operation are both set to positive values, and the rotational speed Since the rotation speed of the circulation fan 12 and the ventilation fan 16 is increased by executing the change process, the following advantages are obtained as compared with the case where the rotation speed is decreased.

  (1) Since the warm air drying operation is generally used for drying the bathroom 2 after bathing or drying clothes, inconveniences are unlikely to occur even if the ventilation air flow and the circulation air flow are slightly increased by several percent.

  (2) The air-drying operation is used as a cool air mode mainly for obtaining a cool air feeling during bathing in the summer, so that inconveniences are unlikely to occur even if the ventilation air flow and the circulation air flow are slightly increased.

  (3) Even when ventilation is performed for 24 hours, problems do not easily occur even if the ventilation airflow and the circulation airflow increase slightly. On the other hand, when performing ventilation for 24 hours, if ventilation air volume reduces, the problem that ventilation will not be performed with desired air volume will arise.

  The first predetermined rotation speed HK1 and the second predetermined rotation speed HK2 may be negative values, and the rotation speed of the circulation fan 12 and the ventilation fan 16 may be decreased by executing the rotation speed change control.

  In the present embodiment, when the rotation speed changing process is executed during the hot air drying operation or the air blowing drying operation, first, after the rotation speed of the circulation fan 12 is increased by the first predetermined rotation speed HK1, the operation sound is reduced. If not, the rotational speed of the ventilation fan 16 is increased by the second predetermined rotational speed HK2 in response to the re-start command for the rotational speed changing process, but it is rotated during the hot air drying operation or the air blowing drying operation. When performing the number change process, first, after increasing the rotation speed of the ventilation fan 16 by the second predetermined rotation number HK2, when the operation sound does not become small, in response to the re-start command of the rotation speed change process, The rotation speed of the circulation fan 12 may be changed after the rotation speed of the ventilation fan 16 is changed so that the rotation speed of the circulation fan 12 is increased by the first predetermined rotation speed HK1.

  In the present embodiment, the rotation speed of the ventilation fan 16 is increased by increasing the rotation speed of the circulation fan 12 by the first predetermined rotation speed HK1 and then receiving the rotation speed change process start command again from the bathroom operator 10. Although the number is increased by the second predetermined rotational speed HK2, as another embodiment, after the first predetermined rotational speed HK1 is increased, a re-start command is issued even if a predetermined time elapses. When not given, the rotational speed of the ventilation fan 16 may be automatically increased by the second predetermined rotational speed HK2.

  Next, a description will be given of a case where resonance occurs during the heating operation in which the circulation fan 12 is operated without operating the ventilation fan 16 and the operation sound is increased.

 In the present embodiment, in the heating operation, the rotation speed of the circulation fan 12 can be set to a plurality of rotation speeds. In the “heating strong” operation, the rotation speed of the circulation fan 12 is a high rotation speed for heating, for example, 1800 rpm. In the “heating weak” operation, the rotation speed of the circulation fan 12 is set to a low rotation speed for heating, for example, 1200 rpm.

  When the maintenance engineer confirms by hearing that the operation sound is loud during the heating operation of the bathroom heater / dryer 1, for example, “heating is weak”, the maintenance engineer performs the rotation speed changing process on the bathroom operating device 10. An operation for start command is performed, and a start command for fan speed change processing is given to the control unit 54.

  In response to this rotation speed change process start command, the control unit 54 decreases the set rotation speed of the circulation fan 12 by the third predetermined rotation speed HK3. This third predetermined rotational speed is, for example, a rotational speed of several percent, for example, 2%, of the rotational speed of the circulating fan 12 before the heating rotational speed changing process is executed. Since the set rotational speed of the circulation fan 12 before execution of the heating rotational speed changing process is 1200 rpm, the rotational speed is decreased by 24 rpm and changed to 1176 rpm. Note that the third predetermined rotation speed HK3 is not limited to the above-mentioned number%, and may be more than that.

  After the start command of the rotation speed changing process for reducing the rotation speed of the circulation fan 12 by the third predetermined rotation speed HK3, the maintenance engineer confirmed that the driving sound was reduced by hearing and the resonance state was resolved. When the determination is made, an operation for completing the rotation speed changing process is performed on the bathroom operating device 10, and a completion instruction for the fan rotating speed changing process is given to the control unit 54.

  In response to the completion command for the rotation speed change process, the control unit 54 sets the above-mentioned 1176 rpm, which is the rotation speed after the change of the circulation fan 12 after being decreased by the third predetermined rotation speed HK3, as the set rotation speed. 54, and the rotation speed of the circulation fan 12 is controlled to 1176 rpm which is the changed rotation speed stored in the memory 52 at the time of performing the heating operation of “heating weak” after the next time. drive. Thereby, in the operation after the next time, resonance caused by the rotation of the circulation fan 12 can be prevented.

  Further, a case will be described in which the operation sound is loud during the “heating high” operation, not during the “heating weak” operation in a state where the rotation speed of the circulation fan 12 is set to the low rotation number for heating.

  When the maintenance engineer visually confirms that the operation sound is loud during the heating operation of “heating strong” of the bathroom heater / dryer 1, the maintenance engineer instructs the bathroom operator 10 to start the rotation speed changing process. To give a control unit 54 a command to start fan speed change processing. The controller 54 increases the set rotational speed of the circulation fan 12 by the fourth predetermined rotational speed HK4 in response to the rotational speed changing process start command. This fourth predetermined rotational speed is, for example, a rotational speed of several percent, for example, 2%, of the set rotational speed of the circulation fan 12 before the heating rotational speed changing process is executed. Since the set rotational speed of the circulation fan 12 before execution of the heating rotational speed changing process is 1800 rpm, it is increased by 36 rpm and changed to 1836 rpm. Note that the fourth predetermined rotational speed HK3 is not limited to the above-mentioned number%, and may be more than that.

  After the start command of the rotation speed changing process for increasing the rotation speed of the circulation fan 12 by the fourth predetermined rotation speed HK4, the maintenance engineer confirms that the driving sound is reduced by hearing and the resonance state is resolved. When the determination is made, an operation for completing the rotation speed changing process is performed on the bathroom operating device 10, and a completion instruction for the fan rotating speed changing process is given to the control unit 54.

  In response to the completion command for the rotation speed change process, the control section 54 sets the above-mentioned 1836 rpm, which is the rotation speed after the circulation fan 12 after being increased by the fourth predetermined rotation speed HK4, as the set rotation speed. 54, and the rotation speed of the circulation fan 12 is controlled to 1836 rpm, which is the changed rotation speed stored in the memory 52, at the time of execution of the “heating high” heating operation after the next time. drive. Thereby, in the operation after the next time, resonance caused by the rotation of the circulation fan 12 can be prevented.

  As described above, during the heating operation, even when the resonance occurs due to the rotation of the circulation fan 12 and the operation sound becomes loud, the rotation speed of the circulation fan 12 is resonantly rotated by executing the heating rotation speed changing process. Since it deviates from the number, it is possible to prevent the resonance state from being generated and a loud driving sound to be generated.

  Similarly to the hot air drying operation and the air blowing drying operation, the rotation speed of the circulation fan 12 after the change in which the resonance state has been eliminated is stored in the memory 52 as the set rotation speed when the heating operation is performed next time.

  It should be noted that the set rotational speeds of the fans 12 and 16 at the time of the next and subsequent operations stored in the memory 52 are reset to the initial set values, that is, the factory-set rotational speeds before executing the rotational speed changing process. Can be returned. This reset operation is, for example, an operation of pressing the reset switch 50 while simultaneously pressing the heating switch 46 and the cool air switch 47 of the bathroom operating device 10 of FIG.

  According to this embodiment, there are further advantages as follows.

  (1) “Heating strongly” operation is mainly used for pre-heating to warm the bathroom before bathing, so there is little inconvenience even if the circulating air volume increases slightly.

  (2) “Heating weak” operation is mainly used for heating while taking a bath. If the circulating air volume increases, the air volume hitting the wet skin of the user in the bathroom increases and the user feels chilly. Even if the circulating air volume decreases slightly, inconveniences are unlikely to occur.

  The first predetermined rotational speed HK1, the second predetermined rotational speed HK2, the third predetermined rotational speed HK3, and the fourth predetermined rotational speed HK4 may be changed as appropriate.

  In the above embodiment, the maintenance engineer operates the bathroom operating device 10 as the rotation speed change processing command means. However, not only the maintenance engineer but also the operator or user of the bathroom heating / drying machine operates it. It may be.

  In the above embodiment, the rotation speed change processing command means is shared by the bathroom operating device 10, but is not limited thereto, and may be shared by the dressing room operating device 9, or by both operating devices 9 and 10. Alternatively, a switch may be added as a rotation speed change process command means. Further, the operation for start command and the operation for completion command of the rotation speed changing process are not limited to the operations of the above-described embodiment, and can be arbitrary operations.

DESCRIPTION OF SYMBOLS 1 Bathroom heating dryer 2 Bathroom 4 Ceiling 8 Heat source machine 9 Operator for dressing room 10 Operator for bathroom (rotation speed change process command means)
DESCRIPTION OF SYMBOLS 11 Heat exchanger for hot air 12 Circulation fan 14 Thermal valve 16 Ventilation fan 15 Heating hot water thermistor 18 Outlet 20 Grill plate 21 Suction port 22 Bathroom temperature thermistor 53 Arithmetic circuit 54 Control part HK1 1st predetermined rotation speed HK2 2nd predetermined Rotational speed HK3 Third predetermined rotational speed HK4 Fourth predetermined rotational speed

Claims (5)

A ventilation fan for ventilating the air in the bathroom, a circulation fan for circulating the air in the bathroom, and a heating means for heating the circulating air;
While operating the ventilation fan and the circulation fan, hot air drying operation for heating the air by the heating means;
A ventilation drying operation that operates the ventilation fan and the circulation fan and does not heat the air by the heating means;
In the bathroom heating / drying machine capable of operating the circulation fan and heating the air by the heating means without operating the ventilation fan,
In response to the operation, a rotation speed change process command means for outputting a start command and a completion command of the fan speed change process,
Control means for controlling the rotational speed of at least one of the ventilation fan and the circulation fan based on a start command and a completion command of the rotational speed change process input from the rotational speed change process command means; Prepared,
When the start command for the rotation speed change process is input during execution of the hot air drying operation or the air blowing drying operation, the control means is configured to control one of the ventilation fan and the circulation fan. When the rotational speed is changed to a first predetermined rotational speed, and the rotational speed of the one fan is changed to the first predetermined rotational speed, and the rotation speed changing process start command is input again, the ventilation fan and Changing the rotational speed of the other fan of the circulation fans to a second predetermined rotational speed;
A bathroom heating dryer characterized by that. The control means has a storage unit,
The control means, after changing the rotation speed of the one fan, after the first predetermined rotation speed is changed, when the completion command for the rotation speed change process is inputted, Memorize | stored in the said memory | storage part as a rotation speed after change for this one fan,
After the rotation speed of the other fan is changed to the second predetermined rotation speed and the completion command for the rotation speed change process is input, the rotation speed of the other fan after the change is set for the other fan. Is stored in the storage unit as the number of rotations after the change,
When the rotation speed after change is stored in the storage section, the control means stores the rotation speed of the fan in the storage section when the hot air drying operation or the air blowing drying operation is executed. To control the speed after change for the corresponding fan,
The bathroom heating dryer according to claim 1. The change of the first predetermined rotation speed of the one fan and the change of the second predetermined rotation speed of the other fan are both changes that increase the rotation speed.
The bathroom heating dryer according to claim 1 or 2. A setting means capable of setting the number of rotations of the circulation fan in the heating operation in a plurality of stages;
The control means controls the rotational speed of the circulation fan based on the setting of the setting means,
The control means is configured to issue an instruction to start the rotation speed change process during execution of the heating operation in a state where the rotation speed of the circulation fan is set to the rotation speed of the lowest stage among the plurality of stages. When input, the rotational speed of the circulation fan is decreased by a third predetermined rotational speed, and the rotational speed changing process is started during the heating operation in a state where the rotational speed is set to a speed other than the lowest stage. When a command is input, the rotational speed of the circulation fan is increased by a fourth predetermined rotational speed.
The bathroom heating dryer according to any one of claims 1 to 3. The control means is configured to change at least one of the one fan and the other fan when the rotation speed change process is not input after the rotation speed of the other fan is changed to the second predetermined rotation speed. Change the rotation speed of one fan further,
The bathroom heating dryer according to any one of claims 1 to 4.

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