JP2001248878A - Bathroom heater/dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform emergent heating operation or drying operation when the indoor temperature can not be detected due to occurrence of abnormality in an indoor temperature detecting means. SOLUTION: Air is heated through a heat exchanger 12 so that hot air is supplied by means of a heating/circulating fan 11 and heating operation is performed to keep a set temperature while detecting the indoor temperature by means of an indoor temperature sensor 17 provided in the vicinity of an air inlet 20. Upon occurrence of abnormality in the indoor temperature sensor 17, heating operation can not be controlled based on the indoor temperature and heating operation is performed intermittently at a predetermined duty ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathroom heater / dryer which is installed on a ceiling portion of a bathroom and blows warm air to heat the bathroom.

[0002]

2. Description of the Related Art A bathroom heater / dryer for heating a bathroom by blowing out warm air and drying laundry suspended in the bathroom has been used. In such a bathroom heater / dryer, the air sucked from the air suction port is heated by exchanging heat with a hot water heat exchanger, and warm air is blown into the bathroom from a hot air outlet by a heating circulation fan. In addition, it heats the bathroom and dries clothes.

Further, in such a bathroom heating / drying machine, it is necessary to maintain a comfortable heating temperature, especially when taking a bath. Therefore, the room temperature is detected by a room temperature sensor provided near the air suction port. The thermal valve is controlled to open and close according to the temperature detected by the room temperature sensor so that the temperature is maintained at the set temperature. That is, when the room temperature is lower than the set temperature, the hot water valve is opened to circulate hot water through the hot water heat exchanger, or when the room temperature becomes higher than the set temperature, the hot water valve is closed and the hot water in the hot water heat exchanger is closed. The circulation is stopped, thereby keeping the room temperature near the set temperature.

[0004]

However, in the conventional bathroom heater / dryer, when the room temperature detecting means including the room temperature sensor and its sensor circuit becomes abnormal due to disconnection or breakage, the room temperature of the bathroom cannot be detected. In
Since the room temperature could not be controlled, the heating operation and the drying operation were stopped.

For this reason, there has been a problem that neither heating nor drying operation can be performed at all until the cause of the abnormality is removed by repair or the like and the original condition is restored. In particular, when a shower or the like is used and the bathroom is not sufficiently warm, the user may feel troubled by the cold. Further, in the case of drying clothes and the like, there is a disadvantage that even if the room temperature detecting means is abnormal, the drying operation cannot be performed, although room temperature control with very high accuracy is not required.

As described above, in the conventional bathroom heater / dryer, if the temperature detecting means such as the room temperature sensor or the heat exchanger temperature sensor fails, it is impossible to perform an appropriate operation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has an object to solve the problem even when the temperature detecting means such as the indoor temperature detecting means and the heat exchanger temperature detecting means fails. Another object of the present invention is to make it possible to operate a bathroom heater / dryer with an appropriate operation.

[0008]

The bathroom heater / dryer according to the first aspect of the present invention is installed on a ceiling portion of a bathroom and controls a heating operation based on the room temperature detected by the room temperature detecting means. In the bathroom heater / dryer described above, when an abnormality occurs in the indoor temperature detecting means, the heating operation or the drying operation is performed intermittently at a predetermined duty ratio.

According to the first aspect of the present invention, when an abnormality occurs in a room temperature detecting means such as a temperature sensor or a sensor circuit, the heating operation or the drying operation is intermittently performed at a specified duty ratio. Even if optimal room temperature control cannot be performed because the operation is performed, heating the bathroom and drying clothes etc. with a fixed capacity as an emergency measure until the abnormality is repaired. Can be. In addition, since the heating operation or the drying operation is continuously performed at a constant duty ratio and the operation is not continuously performed, the room is not excessively heated. Further, when there is no abnormality in the room temperature detecting means, normal operation can be performed, and in that case, a comfortable driving state can be maintained. The heat source of the heat source unit may be an arbitrary one such as gas, electricity, and oil.

A bathroom heating / drying apparatus according to a second aspect of the present invention includes a heat exchanger for heating air, a unit for detecting a temperature of the heat exchanger, and a unit for detecting a room temperature. In a bathroom heating / drying machine that controls the drying operation based on the indoor temperature detected by the detecting means, when an abnormality occurs in the indoor temperature detecting means, the detected temperature of the heat exchanger temperature detecting means is set to a predetermined value. It is characterized in that the operation of the ventilator is started after the temperature has been reached.

According to the second aspect of the present invention, the ventilation device is not operated until the temperature of the heat exchanger reaches a predetermined temperature even when an abnormality occurs in the indoor temperature detecting means. Low-temperature ventilation prevention control in which the ventilation device is stopped until the room temperature rises in order to speed up the rise can be performed as an emergency measure.

According to a third aspect of the present invention, there is provided a bathroom heater / dryer including a heat exchanger for heating air, a unit for detecting a temperature of the heat exchanger, and a unit for detecting a room temperature. In a bathroom heating / drying machine that controls the antifreezing operation based on the room temperature detected by the detection unit, when an abnormality occurs in the room temperature detection unit, a heating fan is driven to blow air. The antifreeze operation is performed when the temperature detected by the heat exchanger temperature detecting means falls below a predetermined temperature.

According to the third aspect of the present invention, when an abnormality occurs in the indoor temperature detecting means, the heating fan is driven to blow air to thereby make the heat exchanger temperature and the indoor temperature equal. Since the temperature is to be balanced, the indoor temperature can be detected by the heat exchanger temperature detecting means. Therefore, even if the indoor temperature detecting means is abnormal, the antifreeze operation can be performed as an emergency measure.

According to a fourth aspect of the present invention, there is provided a bathroom heating / drying apparatus comprising: a heat exchanger for heating air; a heating fan for blowing air heated by the heat exchanger; and a temperature of the heat exchanger. And a means for detecting an indoor temperature, wherein the bathroom heating / drying device controls the anti-freezing operation based on the indoor temperature detected by the indoor temperature detecting means. Is generated, the heating fan is driven to blow air, and when a certain time has elapsed from the start of blowing, or when the detected temperature of the heat exchanger temperature detecting means has hardly changed, the detected temperature is The method is characterized in that the detected temperature when the temperature hardly changes is treated as room temperature.

According to the fourth aspect of the present invention, when an abnormality has occurred in the indoor temperature detecting means, the heating fan is driven to blow air so that the heat exchanger temperature and the indoor temperature are changed. The heat exchange is performed after a certain period of time has elapsed from the start of air blowing or after it has been determined that the heat exchanger temperature has hardly changed and the heat exchanger temperature and room temperature have reached equilibrium. Consider the vessel temperature to be room temperature,
When there is an abnormality in the indoor temperature detecting means, the anti-freezing operation can be performed as an emergency measure.

[0016] According to a fifth aspect of the present invention, there is provided a bathroom heating / drying apparatus comprising: a heat exchanger for heating air; a heating fan for blowing out the air heated by the heat exchanger; and a temperature of the heat exchanger. And a bathroom heating / drying device that controls the heating operation based on the heat exchanger temperature detected by the heat exchanger temperature detecting means, when an abnormality occurs in the heat exchanger temperature detecting means. Is to drive the heating fan after a predetermined time has elapsed from the start of the heating operation.

According to the fifth aspect of the present invention, during the heating operation, even if the heat exchanger temperature cannot be detected due to the abnormality of the heat exchanger temperature detecting means during the heating operation, the heating time is not changed until the predetermined time elapses from the start of heating. By stopping the air supply by stopping the heating fan, it is possible to prevent the blowing of cool air. In addition, when there is no abnormality in the heat exchanger temperature detecting means, normal heating operation can be performed, so that blowing of cool air can be prevented and comfortable heating operation can be performed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a sectional view of a bathroom heating / drying machine 1 according to one embodiment of the present invention.
The bathroom heating / drying machine 1 mainly includes a bathroom heating / drying machine main body 2 and a front cover 3. In the bathroom heater / dryer main body 2, a fan storage unit 5 and a ventilation device storage unit 6 are provided inside a casing 4 which is opened on the lower surface.
Is provided around. An air passage 8 is provided below the fan storage unit 5
Are continuously formed, and a louver plate 19 for adjusting the wind direction is provided below the air passage 8.

A heating circulation fan 11 such as a cross flow fan is installed in the fan housing 5, and a hot water heat exchanger 12 is provided on the suction side of the fan housing 5. As shown in FIG. 2, the hot water heat exchanger 12 is connected to a heat source device 23 such as a water heater through a hot water supply pipe 24, and a circulation pump 25 and a thermal valve 26 are provided in the hot water supply pipe. Therefore, by operating the circulation pump 25 to circulate the hot water supplied from the heat source unit 23 to the hot water heat exchanger 12, the air passing through the hot water heat exchanger and the hot water exchange heat, and the hot water heat exchanger 12 The air passing through can be heated. A heat exchanger temperature sensor 18 for measuring the temperature of the hot water heat exchanger is provided on or near the hot water heat exchanger.

In the ventilation device housing 6, a ventilation device 15 constituted by a sirocco fan 13 and a motor 14 is provided.
Is stored, and in the blowing direction of the ventilation device 15,
An exhaust port 16 is opened in the casing 4.

On the other hand, the front cover 3 is provided with a hot air outlet 21 facing the lower end surface of the air passage 8 of the bathroom heating / drying body 2. An air inlet 20 for sucking air adjacent to the hot air outlet 21 on one side.
However, the other side is provided with a ventilating air inlet 22, all of which are formed in a grill shape. A room temperature sensor 17 for detecting the room temperature in the bathroom is provided near the air inlet 20.

Thus, in the bathroom heater / dryer 1, during the heating operation, the air sucked from the air suction port 20 is exchanged with hot water by the hot water heat exchanger 12, and is heated by the hot water heat exchanger 12. The heated hot air is blown into the bathroom from the hot air outlet 21 by the circulation fan 11 for heating. When drying clothes or the like suspended in the bathroom, hot air is blown from the warm air outlet 21 toward the clothes or the like in the same manner, and the ventilation device 15 is operated to operate the bathroom containing moisture. Is discharged outside through the exhaust port 16.

In a normal heating operation or drying operation,
At this time, the room temperature is detected by a room temperature sensor 17 installed in the vicinity of the air suction port 20, and the thermal valve 2 is
6 is controlled so that the temperature of the hot air blown out from the hot air outlet 21 becomes the set temperature.

However, when the room temperature sensor 17 or its sensor circuit breaks down or outputs an abnormal signal, the thermal valve 26 is controlled based on the room temperature detected by the room temperature sensor 17. Can not. Therefore, when the main controller (not shown) in the bathroom heater / dryer 1 determines that the room temperature sensor 17 and its sensor circuit and the like are abnormal, as shown in FIG. [= T1 / (T1 + T2)] controls the opening and closing of the hot water valve 26, and causes the heat source unit to output an operation command at the same duty ratio or the same opening and closing timing as shown in FIG. To control the room temperature.
In this case, it is preferable to open and close the heating circulation fan 11 at substantially the same timing as the thermal valve 26 as shown in FIG. The optimum value of the duty ratio can be determined in advance by experiments.

As described above, even if there is an abnormality in the room temperature sensor 17 or the like, the heating operation or the drying operation is performed at a predetermined duty ratio, so that optimum temperature control cannot be performed. Until the anomaly such as 17 is repaired, it is possible to make the heating of the bathroom and the drying of the clothes etc. in an emergency measure and safely.
Inconvenience at the time of sensor abnormality can be reduced.

The above-described embodiment can be modified in various ways. As shown in FIG. 4, the operation command to the heat source unit 23 is kept on, and the heat source unit 23 is continuously burned. The thermal valve 26 may be opened and closed at a specified duty ratio, or, as shown in FIG. 5, while the thermal valve 26 is kept open, an operation command to the heat source unit 23 is controlled to be on and off. , The heat source unit 23 may be operated intermittently for combustion. As shown in FIG. 6, the timing for controlling the opening and closing of the thermal valve 26 is determined by an operation command to the heat source unit 23 being turned on,
It may be slightly delayed from the timing of switching off.

(Second Embodiment) FIG. 7 is a view for explaining an anti-freezing operation when an abnormality such as a room temperature sensor occurs in a bathroom heating / drying machine according to still another embodiment of the present invention. Here, FIG. 7 shows the operation when the room temperature is equal to or lower than the freezing prevention operation start temperature, and FIG. 7A is a time chart showing a change in the heat exchanger temperature detected by the heat exchanger temperature sensor 18, (B) Circulating fan 1 for heating
1 is a time chart showing the operation state of FIG.
6 is a time chart showing the opening and closing operation of No. 6. Hereinafter, an operation when an abnormality occurs in the room temperature sensor 17 below the freezing prevention operation start temperature will be described with reference to FIG.

When an abnormality occurs in the room temperature sensor 17 or its sensor circuit, the thermal valve 26 is closed and the operation of the heating circulation fan 11 is started (period I). The operation of the heating circulation fan changes the heat exchanger temperature in a direction to be in equilibrium with room temperature.

If the temperature monitored by the heat exchanger temperature sensor 18 exceeds the freeze prevention operation start temperature and falls below the freeze prevention operation start temperature, it is determined that the indoor and outdoor temperatures are temperatures at which freezing may occur, The heating circulating fan 18 is stopped, the thermal valve 26 is opened, and the circulating pump 25 circulates hot water through the hot water supply pipe 24 to prevent freezing (period II).

Next, FIG. 8 shows an operation when the room temperature is higher than the freezing prevention operation start temperature, and FIG. 8A shows a change in the heat exchanger temperature detected by the heat exchanger temperature sensor 18. A time chart, (b) is a time chart showing the operating state of the circulation fan 11 for heating, and (c) is a time chart showing the opening and closing operation of the thermal valve 26. If an abnormality occurs in the room temperature sensor 17 or its sensor circuit in this situation, the thermal valve 26 is closed and the heating circulation fan 11 is started (period I). In this case as well, the operation of the heating circulation fan changes the heat exchanger temperature in a direction to be in equilibrium with room temperature. Then, after a lapse of a predetermined time from the start of the operation of the heating circulation fan 11, or when the rate of change of the heat exchanger temperature becomes equal to or less than a certain value, it is determined that the heat exchanger temperature is in an equilibrium state with the room temperature. The room temperature is detected by the sensor 18.

As described above, if the rate of change of the temperature detected by the heat exchanger temperature sensor 18 becomes small before the temperature detected by the heat exchanger temperature sensor 18 becomes equal to or lower than the freezing prevention operation start temperature, the room It determines that the outdoor temperature is not a temperature at which freezing may occur, and stops the heating circulation fan 18 (period)
II).

When the heat exchanger temperature (room temperature) is continuously monitored by the heat exchanger temperature sensor 18 and the heat exchanger temperature falls below the freezing prevention operation start temperature (period III), Open the thermal valve 26 and open the circulation pump 25
The hot water is circulated through the hot water supply pipe 24 to prevent freezing.

Therefore, according to this embodiment, even when an abnormality occurs in the room temperature sensor 17 or the like in the bathroom heater / dryer, the room temperature at which freezing may occur can be detected by the separately provided heat exchanger temperature sensor 18. Therefore, antifreeze operation can be performed without opening the thermal valve unconditionally.

When an abnormality occurs in the room temperature sensor 17, not only does the heating circulation fan 11 operate as described above, but also
If the ventilation device 15 is operated together with the heating circulation fan 11, the temperature in the bathroom can be made close to the outdoor temperature, and the antifreezing operation can be performed more accurately.

(Third Embodiment) In the drying operation of the bathroom heater / dryer, when the temperature of the bathroom is not sufficiently increased at the start of the operation or the like, the ventilation device is stopped to speed up the rise of the bathroom temperature. In advance (called low-temperature ventilation prevention control), the operation of the ventilator has been started after the indoor temperature sensor has confirmed that the temperature in the bathroom has risen sufficiently. Such low-temperature ventilation prevention control is based on the premise that the room temperature sensor detects the room temperature, and therefore cannot be performed if the room temperature sensor or the like fails. Therefore, in the embodiment described below, when an abnormality occurs in the room temperature detecting means such as the room temperature sensor, the low temperature ventilation prevention control can be performed by the heat exchanger temperature sensor.

FIG. 9 is a flowchart showing a method for controlling low-temperature ventilation prevention during the drying operation in this embodiment. First, when the drying switch of the bathroom heater / dryer is turned on to start the drying operation, the main controller in the bathroom heater / dryer checks whether there is any abnormality in the room temperature sensor 17 or the room temperature detecting means such as the sensor circuit thereof (step). S1).

At this time, if there is no abnormality in the room temperature detecting means, normal low-temperature ventilation prevention control is performed (step S).
2). That is, at the time of starting the drying operation, the drying operation of the clothes and the like is performed while the ventilation device 15 is stopped and the warm air is blown out from the warm air outlet 21 to quickly raise the room temperature. When the room temperature detected by the room temperature sensor 17 reaches a predetermined temperature, the operation of the ventilation device 15 is started, and the ventilation device 15 is started.
The drying operation is performed by blowing out warm air from the warm air outlet 21 while discharging moisture outdoors.

On the other hand, if an abnormality is found in the room temperature detecting means, the temperature of the heat exchanger is detected by a heat exchanger temperature sensor, and the detected temperature is set to a predetermined temperature t ° C. (for example, 5 ° C.).
(C) is checked (step S3). If the temperature has not risen to the predetermined temperature t ° C., the ventilation device 15
Is stopped and the drying operation is performed (step S5), and the room temperature is quickly raised. When the temperature in the bathroom reaches t ° C. or higher in this way, the state at or above t ° C. is maintained for a time T1 (for example, 10 ° C.).
Minutes) (step S4)
The operation of the ventilator 15 is started, and the drying operation is performed by blowing out warm air from the warm air outlet 21 while discharging moisture to the outside by the ventilator 15 (step S6).

Therefore, according to this embodiment, even when the temperature of the bathroom cannot be detected due to an abnormality in the room temperature sensor or its sensor circuit in the drying operation of the bathroom heater / dryer,
The low-temperature ventilation prevention control can be performed by using the heat exchanger temperature sensor, and the rise of the bathroom temperature at the start of the drying operation can be prevented from being delayed.

(Fourth Embodiment) In a heating operation of a bathroom heater / dryer, when the temperature of the heat exchanger is not sufficiently increased at the start of the operation or the like, circulation for heating is performed to prevent blowing of cool air. The fan is stopped (called cold air prevention control), and after the heat exchanger temperature sensor confirms that the temperature of the heat exchanger has sufficiently increased, the heating circulation fan is started to operate. Such cold air prevention control is based on the premise that the heat exchanger temperature is detected by the heat exchanger temperature sensor, and therefore cannot be performed if the heat exchanger temperature sensor fails. Therefore, in the embodiment described below, when an abnormality occurs in the heat exchanger temperature sensor or its sensor circuit, the cold air prevention control can be performed by the room temperature sensor.

FIG. 10 is a flow chart showing a method of controlling the cool air during the heating operation in this embodiment. First, when the heating switch of the bathroom heating / drying machine is turned on and the heating operation is started, the main controller in the bathroom heating / drying machine has no abnormality in the heat exchanger temperature detecting means such as the heat exchanger temperature sensor 18 and its sensor circuit. (Step S1)
1).

At this time, if there is no abnormality in the heat exchanger temperature detecting means, normal cold air prevention control is performed (step S1).
5). That is, at the start of the heating operation, the heating circulation fan 1
While the operation of the air conditioner 1 is stopped, the air is heated by the heat exchanger 12, the room temperature is raised by natural convection and heat conduction, and the bathroom is heated while preventing cold air. Heat exchanger temperature sensor 1
When the temperature of the heat exchanger detected at 8 reaches a predetermined temperature set to a sufficient value, the operation of the circulation fan 11 for heating is started, and warm air is blown out from the hot air outlet 21 to perform heating operation. .

On the other hand, if an abnormality is found in the heat exchanger temperature detecting means, the elapsed time from the start of the heating operation is checked to determine whether the elapsed time is within the time T11 (step S12). Here, the time T11 is experimentally or empirically a temperature at which it is considered that the heat exchanger temperature has not yet sufficiently increased since the start of the heating operation.

If the elapsed time is within the time T11, the temperature of the heat exchanger is still expected to be low, so the heating circulation fan 11 is stopped (step S16). If the elapsed time from the start of the heating operation exceeds the time T11,
It is determined whether a sufficient time T12 (> T11) has elapsed (step S13). The time T12 is an empirically or experimentally elapsed time that is considered to be sufficient for the heat exchanger temperature to rise to a sufficient temperature after the heating operation is started.

If the elapsed time is equal to or longer than the time T11 and is equal to or less than the time T12, the temperature near the heat exchanger is expected to increase due to heat while the heating circulation fan 11 is stopped, but the room temperature is Since there is a possibility that the temperature has not yet risen sufficiently, the heating circulation fan 11 is operated to send a weak wind (step S17), and the heat trapped in the vicinity of the heat exchanger 12 is sent indoors to the inside of the heat exchanger 12. Temperature and room temperature are made uniform. Here, the weak wind is a wind speed set to be lower than the set wind speed for preventing cold wind.

The time elapsed from the start of the heating operation is the time T12.
After that, the weak wind operation is continued until the room temperature becomes equal to or higher than the predetermined temperature t ° C. (steps S14 and S17), and after a lapse of time T12, the room temperature detected by the room temperature sensor 17 is changed to the predetermined temperature t ° C. At this time, the heating circulation fan 11 is operated at the set wind speed.

Therefore, according to this embodiment, in the heating operation of the bathroom heater / dryer, even when the temperature of the heat exchanger cannot be detected due to the abnormality of the heat exchanger temperature sensor 18 or its sensor circuit, the indoor temperature sensor 17 is controlled. A comfortable heating operation can be performed while performing the cool air prevention control using the air conditioner.

In this embodiment, the room temperature t ° C. at which the set wind speed operation is started may be a fixed value or may be changed depending on the heating set temperature. Step S1
Step 4 can be omitted.

[0049]

According to the present invention, even when an abnormality occurs in the temperature detecting means such as the room temperature sensor and the heat exchanger sensor, the abnormality can be covered and the appropriate heating operation and drying operation can be performed. .

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing the structure of a bathroom heating / drying device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a hot water circuit between a hot water heat exchanger and a heat source device.

3A and 3B are diagrams showing a state of a heating operation or a drying operation at the time of abnormality of a room temperature sensor or the like, wherein FIG. 3A is a time chart showing opening and closing operations of a heat valve, and FIG. Is a time chart showing ON / OFF of the heating operation command to be performed, (c) is a time chart showing ON / OFF operation of the heating circulation fan, and (d) is a time chart showing a change in room temperature.

4A and 4B are diagrams showing another control method of the heating operation or the drying operation when the room temperature sensor or the like is abnormal, wherein FIG. 4A is a time chart showing the opening and closing operation of the thermal valve, and FIG. 7C is a time chart showing ON / OFF of a heating operation command output thereto, FIG. 7C is a time chart showing ON / OFF operation of the heating circulation fan, and FIG. 7D is a time chart showing a change in room temperature.

5A and 5B are diagrams showing still another control method of the heating operation or the drying operation when the room temperature sensor or the like is abnormal, and FIG.
Is a time chart showing the opening and closing operation of the thermal valve, (b) is a time chart showing ON and OFF of a heating operation command output to the heat source device, (c) is an ON of a heating circulation fan,
A time chart showing an OFF operation, and (d) is a time chart showing a change in room temperature.

6A and 6B are diagrams illustrating still another control method of the heating operation or the drying operation when the room temperature sensor or the like is abnormal, and FIG.
Is a time chart showing the opening and closing operation of the thermal valve, (b) is a time chart showing ON and OFF of a heating operation command output to the heat source device, (c) is an ON of a heating circulation fan,
A time chart showing an OFF operation, and (d) is a time chart showing a change in room temperature.

FIG. 7 is a view showing a state of a freezing prevention operation in still another embodiment of the present invention, showing an operation when the room temperature is equal to or lower than a freezing prevention operation start temperature, and (a) is a heat exchanger temperature sensor; Is a time chart showing a change in the heat exchanger temperature detected by the above, (b) is a time chart showing an operation state of the heating circulation fan, and (c) is a time chart showing an opening and closing operation of the heat valve.

FIG. 8 is a view showing a state of a freezing prevention operation in still another embodiment of the present invention, showing an operation when a room temperature is higher than a freezing prevention operation start temperature, and (a) shows a state of a heat exchanger temperature sensor; 5B is a time chart illustrating a change in the detected heat exchanger temperature, FIG. 5B is a time chart illustrating an operating state of the heating circulation fan, and FIG. 5C is a time chart illustrating an opening and closing operation of the thermal valve.

FIG. 9 is a flowchart illustrating an operation during a drying operation according to still another embodiment of the present invention.

FIG. 10 is a flowchart showing an operation during a heating operation according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathroom heating dryer 11 Heating circulation fan 12 Heat exchanger 15 Ventilation device 17 Indoor temperature sensor 18 Heat exchanger temperature sensor 20 Air intake 21 Hot air outlet 22 Ventilation intake

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Keiko Seta 93 Edocho, Chuo-ku, Kobe-shi, Hyogo F-term in Noritz Co., Ltd. 3L060 AA02 CC02 CC04 DD07 EE32 EE33 EE35 3L071 AA02 AB03 AC01 AE05 AF00 AG01 AG02 AG06 3L072 AA06 AB01 AB06 AC01 AD16 AE06 AE10 AF01 AF06 AG05 3L113 AA01 AB02 AC03 AC66 AC81 BA14 CA08 CB02 CB24 CB37 DA21

Claims (5)

[Claims] 1. A bathroom heater comprising a heat exchanger for heating air and means for detecting indoor temperature, wherein a heating operation and a drying operation are controlled based on the indoor temperature detected by the indoor temperature detecting means. In the dryer, when an abnormality occurs in the indoor temperature detecting means, a heating operation or a drying operation is intermittently performed at a predetermined duty ratio. 2. A heat exchanger for heating air, means for detecting the temperature of the heat exchanger, and means for detecting the indoor temperature, based on the indoor temperature detected by the indoor temperature detecting means. In a bathroom heating / drying machine configured to control a drying operation, when an abnormality occurs in the indoor temperature detecting unit, the operation of the ventilation device is started after the temperature detected by the heat exchanger temperature detecting unit reaches a predetermined temperature. A bathroom heating / drying machine characterized in that it is made to make it dry. 3. A heat exchanger for heating air, means for detecting the temperature of the heat exchanger, and means for detecting the indoor temperature, based on the indoor temperature detected by the indoor temperature detecting means. In the bathroom heating / drying machine configured to control the anti-freezing operation, when an abnormality occurs in the indoor temperature detection unit, a heating fan is driven to blow air, and the detected temperature of the heat exchanger temperature detection unit is reduced. A bathroom heater / dryer characterized in that an antifreeze operation is performed when the temperature falls below a predetermined temperature. 4. A heat exchanger for heating air, a heating fan for blowing out the air heated by the heat exchanger, means for detecting the temperature of the heat exchanger, and detecting a room temperature. A bathroom heater / dryer that controls the anti-freezing operation based on the indoor temperature detected by the indoor temperature detecting means.If an abnormality occurs in the indoor temperature detecting means, a heating fan is provided. The air is driven and blown, and when a certain time has elapsed from the start of blowing, or when the detected temperature of the heat exchanger temperature detecting means hardly changes, the detected temperature is treated as room temperature. Bathroom heating dryer. 5. A heat exchanger for heating air, a heating fan for blowing out the air heated by the heat exchanger, means for detecting the temperature of the heat exchanger, and a temperature of the heat exchanger. In a bathroom heater / dryer configured to control the heating operation based on the heat exchanger temperature detected by the detection unit, when an abnormality occurs in the heat exchanger temperature detection unit,
A bathroom heater / dryer that drives a heating fan after a predetermined time has elapsed from the start of heating operation.