JP2003074886A - Bathroom heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathroom heater which can supply a heat exchanger with a specified quantity of hot water at start of operation without fail even if the flow characteristic of a flow control valve changes. SOLUTION: This bathroom heater is equipped with a heat exchanger 13 which is supplied with warm water circulated from a warm water heating heat source unit 20 via a warm water pipe HC, being installed in a circulation path for circulating the air within a bathroom by circulation fan 12, and the flow control valve 14 which controls the quantity of supplied warm water to the heat exchanger 13 so as to keep the temperature of the bathroom at a set bathroom temperature, being installed within the warm water pipe HC, and this is so arranged as to start operation in condition that the flow control valve 14 is opened to a preset initial opening. This bathroom heater is so arranged as to control the quantity of supplied warm water to the heat exchanger 13 by keeping the flow control valve 4 at its initial opening while a specified time passes after start of operation, and regulate the opening of the flow control valve 14 after passage of a specified time after start of operation so that the temperature of the heat exchanger 13 may come to the predetermined specified temperature separately for each quantity of circulating air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathroom heater that heats a bathroom by blowing hot air into the bathroom by using heat of hot water supplied from a hot water heating source.

[0002]

2. Description of the Related Art A bathroom heating / drying machine that heats a bathroom by blowing hot air into the bathroom by using the heat of hot water supplied from a hot water heating heat source machine has A circulation fan that circulates air and a heat exchanger to which hot water is circulated and supplied from a hot water heating heat source unit are installed in the air circulation path by the circulation fan, and hot water piping that circulates hot water to the heat exchanger. By turning on and off the thermal valve installed in the, depending on the bathroom temperature,
There is one that keeps the bathroom temperature at the bathroom set temperature.

However, as described above, ON, O
Even if a constant flow rate of hot water is intermittently supplied to the heat exchanger by the FF operated heat valve, the bathroom temperature cannot be accurately maintained at the bathroom set temperature.
It is desirable to provide a flow rate control valve instead of the FF-operated thermal valve, and to proportionally control the flow rate control valve according to the bathroom temperature.

When the flow rate control valve is proportionally controlled according to the bathroom temperature, the bathroom temperature should be raised to near the bathroom set temperature in a short time after the operation of the bathroom heating / drying machine is started. Therefore, at the start of operation, for example, it is desirable to forcibly supply the heat exchanger with a rated amount of hot water such that the bathroom heating / dryer exhibits its rated capacity. It is conceivable to start the operation of the bathroom heating dryer with the flow rate control valve forcedly opened up to (initial opening).

When the bathroom temperature exceeds the heating stop temperature during the operation of the bathroom heating / drying machine and the flow rate control valve is forced to be fully closed, for example, the opening degree of the flow rate control valve at the time of the next valve opening. Is forcibly opened to the opening of the flow rate control valve immediately before fully closed, and the opening degree of the flow rate control valve at the time of next opening is set based on the opening degree of the flow rate control valve immediately before fully closed. It is possible.

[0006]

However, since the flow rate characteristic of the flow rate control valve changes depending on the capacity of the circulation pump installed in the hot water heating heat source device, the pipe resistance, etc., the flow rate control valve is set as described above at the start of operation. Even if the valve is forcibly opened to such an initial opening, the amount of hot water that will cause the bathroom heater / dryer to reach its rated capacity is not reliably supplied to the heat exchanger. There is a problem that it is not always possible to reliably raise the bathroom temperature to near the bathroom set temperature in time.

On the other hand, when the bathroom heating / drying machine is operated under temperature conditions where the bathroom temperature is not so low, such as in early spring, as described above, the flow control valve must be forcibly opened to the initial opening degree at the start of operation. Therefore, if the rated amount of hot water is forcibly supplied to the heat exchanger, the bathroom temperature may exceed the heating stop temperature before normal proportional control works.In such a case, the bathroom temperature stops heating. When the temperature exceeds the temperature, the flow rate control valve is forcibly closed completely, and then when the bathroom temperature drops below the bathroom set temperature, the flow rate control valve will be opened. As described above, if the flow control valve is forcibly opened to the opening just before it is fully closed, the bathroom temperature will immediately exceed the heating stop temperature, so the flow control valve must be fully closed again. I have to. Therefore, in such a case, the flow rate control valve has the same ON and O
Since the FF operation is repeated, there is a problem that the bathroom temperature cannot be converged to the bathroom set temperature.

Further, even when the outside air temperature is low as in the winter, when the operation of the bathroom heating dryer is restarted within a short time after the operation of the bathroom heating dryer is stopped,
Since the bathroom temperature has not dropped so much, as described above, when the bathroom heater / dryer is started with the flow rate control valve forcibly opened to the predetermined initial opening, the bathroom temperature suddenly changes. The problem is that the bath temperature rises and exceeds the bathroom set temperature, and it is not possible to converge the bathroom temperature to the bathroom set temperature in a short time, as in the case of starting the operation of the bathroom heater / dryer under a high outside air temperature condition. There is.

Therefore, a first object of the present invention is to provide a bathroom heater capable of reliably supplying a predetermined amount of hot water to a heat exchanger at the start of operation regardless of the flow rate characteristics of the flow rate control valve. A second object of the present invention is to provide a bathroom heater capable of reliably converging the bathroom temperature to the bathroom set temperature in a short time after the start of operation. A third problem is to provide a bathroom heater capable of reliably converging the bathroom temperature to the bathroom set temperature in a short time even when restarting.

[0010]

Means for Solving the Problems and Effects Thereof In order to solve the above-mentioned first problem, the invention according to claim 1 is to circulate and supply hot water installed in a circulation path for circulating air in a bathroom. A heat exchanger, and a flow rate control valve installed in the circulation path of the hot water for controlling the amount of hot water supplied to the heat exchanger so as to keep the bathroom temperature at the bathroom set temperature, A bathroom heater that starts operation with the flow rate control valve opened to a predetermined initial opening,
The bathroom heater is characterized in that the flow control valve is controlled so that the temperature of the heat exchanger reaches a predetermined temperature.

As described above, in this bathroom heater, the flow rate control valve is controlled so that the temperature of the heat exchanger reaches the predetermined temperature, so that the flow rate characteristic of the flow rate control valve changes. However, it becomes possible to reliably supply a predetermined amount of hot water to the heat exchanger. Therefore, by setting the specified temperature to the temperature of the heat exchanger when a predetermined amount of hot water is supplied, the operation is simply started with the flow rate control valve opened to a predetermined initial opening. Compared with the case, the bathroom temperature can be reliably raised to near the bathroom set temperature in a short time.

Further, immediately after the start of operation, hot water of the rated temperature is not always supplied to the heat exchanger. Therefore, as in the bathroom heater according to the second aspect of the invention, the predetermined time has elapsed from the start of operation. Until the time elapses, the flow rate control valve is held at the predetermined initial opening degree, and after the predetermined time has elapsed from the start of operation, the temperature of the heat exchanger is set to a predetermined specified temperature. By controlling the flow rate control valve, the flow rate control valve can be controlled in the state where hot water of the rated temperature is constantly supplied to the heat exchanger. However, it is possible to prevent overshoot of the heat exchanger temperature without opening the valve more than necessary.

Further, in the bathroom heater according to the third aspect of the invention, the specified temperature is set lower as the circulating air volume of the air in the bathroom decreases. As the blowing speed of the warm air blown from the room decreases, the temperature of the hot air also drops, so the warm air blown from the bathroom heater to the bathroom is less likely to rise to the upper part of the bathroom, and the temperature of the upper part of the bathroom becomes extremely extreme. It is possible to prevent a situation in which the price rises.

In order to solve the above-mentioned second problem, the invention according to claim 4 is a heat exchanger installed in a circulation path for circulating the air in a bathroom, in which hot water is circulated and supplied, A flow rate control valve installed in the circulation path of the hot water for controlling the amount of hot water supplied to the heat exchanger so as to maintain the bathroom temperature at the bathroom set temperature, and the flow rate control valve is predetermined. Start operation with the valve opened to the initial opening,
When fully closing the flow rate control valve after the start of operation, based on the opening degree of the flow rate control valve immediately before the full closure, the bathroom which is configured to set the opening degree of the flow rate control valve at the next opening In the case of a heater, if the bathroom temperature exceeds the bathroom set temperature at the time when a predetermined time has passed from the start of operation, the flow rate control valve is immediately fully closed and the flow rate at the time of opening the next time. A bathroom heater characterized in that the opening of the control valve is set to an opening corrected in the closing direction by a predetermined opening correction amount with respect to the opening immediately before the flow control valve is fully closed. Is provided.

As described above, this bathroom heater immediately fully closes the flow rate control valve when the bathroom temperature exceeds the bathroom set temperature at the time when a predetermined time has passed from the start of operation. The opening degree of the flow rate control valve at the time of the next valve opening is set to an opening degree that is corrected in the closing direction by a predetermined opening degree correction amount with respect to the opening degree immediately before the flow rate control valve is fully closed. Therefore, even if the preset opening degree of the flow rate control valve is too open for the bathroom temperature at the start of operation, the flow rate control valve should be fully closed and then opened again. Since the opening of the flow rate control valve is corrected in the closing direction by the opening correction amount with respect to the initial degree of opening, the flow rate control valve does not repeat ON and OFF operations, and the bathroom temperature can be shortened in a short time. Can be set to the bathroom set temperature.

Particularly, in the bathroom heater of the invention according to claim 5, when the bathroom temperature exceeds the bathroom set temperature at the time when the predetermined time has elapsed from the start of operation, the predetermined time from the start of operation If the opening correction amount is set to increase as the bathroom temperature at the time of elapses increases, the bathroom temperature at the time when the predetermined time elapses from the start of operation greatly exceeds the bathroom set temperature. In that case, that is, when the flow control valve opened to a predetermined initial opening is too wide open with respect to the bathroom temperature at the start of operation, the opening of the flow control valve at the next valve opening will be The opening of the flow control valve at the next valve opening is set according to the degree to which the flow control valve opens too much at the start of operation, such as by making a large correction to the initial opening. Since the further it is possible to converge the bath temperature bath set temperature in a short time.

Further, in order to solve the above-mentioned third problem, the invention according to claim 6 is a heat exchanger installed in a circulation path for circulating air in a bathroom, in which hot water is circulated and supplied, A flow rate control valve installed in the circulation path of the hot water for controlling the amount of hot water supplied to the heat exchanger so as to maintain the bathroom temperature at the bathroom set temperature, and the flow rate control valve is predetermined. A bathroom heater designed to start operation with the valve opened compulsorily up to the initial opening, and if the operation is restarted before a predetermined time has elapsed since the last operation stop, the previous operation The bathroom heater is characterized in that the opening degree of the flow control valve at the time of stop is set to an initial opening degree to start the operation.

As described above, when the operation of the bathroom heater is restarted before a predetermined time has passed since the last stop of operation, that is, when the bathroom temperature has not dropped significantly from the set temperature of the bathroom. When the operation is restarted, the opening degree of the flow rate adjusting valve at the time of the last stop of operation, that is, the opening degree of the flow rate adjusting valve in the state where the bathroom temperature is maintained at the bathroom set temperature is set to the initial opening degree. Since the operation is started by doing so, overshooting of the bathroom temperature against the bathroom set temperature is prevented compared to when the operation is uniformly started from the state where the flow rate control valve is opened to the preset initial opening. Therefore, the bathroom temperature can be surely converged to the bathroom set temperature in a short time.

In particular, like the bathroom heater of the invention according to claim 7, when the operation is restarted before a predetermined time has elapsed since the last time the operation was stopped, the operation is restarted from the time when the operation was stopped. If the initial opening is gradually corrected in the opening direction as the elapsed time increases, the initial opening will be set in anticipation of a decrease in bathroom temperature after the operation is stopped. The bathroom temperature can be reliably converged to the bathroom set temperature in a short time.

In order to solve the above-mentioned third problem, the invention according to claim 8 is a heat exchanger installed in a circulation path for circulating the air in a bathroom, in which hot water is circulated and supplied, A flow rate control valve installed in the circulation path of the hot water for controlling the amount of hot water supplied to the heat exchanger so as to maintain the bathroom temperature at the bathroom set temperature, and the flow rate control valve is predetermined. A bathroom heater that is configured to start operation in a state where the valve is forcibly opened up to the initial opening, and when the temperature of the heat exchanger at the time of starting operation is higher than a predetermined temperature, the temperature at the time of last operation stop The bathroom heater is characterized in that the opening of the flow rate control valve is set to an initial opening to start the operation.

As described above, the operation of this bathroom heater is restarted when the temperature of the heat exchanger at the start of operation is higher than the predetermined temperature, that is, in the state where the bathroom temperature has not dropped significantly from the bathroom set temperature. In the case of the above, the opening degree of the flow rate control valve at the time of the last stop of operation, that is, the opening degree of the flow rate control valve in the state where the bathroom temperature is maintained at the bathroom set temperature is set to the initial opening degree, and the operation is performed. Since it is started, it is possible to prevent the overshoot of the bathroom temperature against the bathroom set temperature and to shorten the time compared to when the operation is uniformly started from the state where the flow rate control valve is opened to the preset initial opening. With this, the bathroom temperature can be reliably converged to the bathroom set temperature.

Particularly, when the temperature of the heat exchanger at the start of operation is higher than a predetermined temperature, as in the bathroom heater of the invention according to claim 9, the temperature of the heat exchanger at the start of operation becomes low. If the initial opening is gradually corrected to the opening direction according to the above, the initial opening will be set in anticipation of a decrease in the bathroom temperature after the operation is stopped. The temperature can be converged to the bathroom set temperature.

In order to solve the above-mentioned third problem, the invention according to claim 10 is a heat exchanger installed in a circulation path for circulating the air in a bathroom, in which hot water is circulated and supplied, A flow rate control valve installed in the circulation path of the hot water for controlling the amount of hot water supplied to the heat exchanger so as to maintain the bathroom temperature at the bathroom set temperature, and the flow rate control valve is predetermined. A bathroom heater configured to start operation in a state where the valve is forcibly opened to the initial opening, and when the bathroom temperature at the time of starting operation is higher than a predetermined temperature, the flow rate control valve at the time of immediately preceding stop of operation. The present invention provides a bathroom heater characterized in that the opening degree is set to an initial opening degree to start the operation.

As described above, this bathroom heater is operated when the bathroom temperature at the start of operation is higher than the predetermined temperature, that is, when the bathroom temperature is not significantly decreased from the bathroom set temperature. The opening degree of the flow rate control valve at the time of the last stop of operation, that is, the opening degree of the flow rate control valve in the state where the bathroom temperature is kept at the bathroom set temperature is set to the initial opening degree to start the operation. Therefore, compared to the case where the operation is uniformly started from the state where the flow rate control valve is opened to the preset initial opening, overshoot of the bathroom temperature with respect to the bathroom set temperature can be prevented,
The bathroom temperature can be reliably converged to the bathroom set temperature in a short time.

Particularly, when the bathroom temperature at the start of operation is higher than a predetermined temperature, as in the bathroom heater of the invention according to claim 11, the initial opening is gradually increased as the bathroom temperature at the start of operation becomes lower. If the opening temperature is corrected to the open direction, the initial opening will be set in anticipation of a decrease in the bathroom temperature after the operation is stopped. Can be made.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings. As shown in FIG. 1, the bathroom heater / dryer 1 is arranged in a main body case 11 in a circulation fan 12 for circulating the air in the bathroom, and in a circulation path of the air in the bathroom by the circulation fan 12. A heat exchanger 13 to which hot water is circulated and supplied from a hot water heating heat source device 20 via a hot water pipe HC is mounted, and a hot water pipe HC for circulating hot water to the heat exchanger 13 is supplied to the heat exchanger 13. A flow rate control valve 14 that opens and closes by a stepping motor that adjusts the amount of hot water to be operated is installed.

Further, in the main body case 11, a controller 15 for integrally controlling the heating mechanism such as the circulation fan 12 and the flow rate control valve 14 is installed, and the suction temperature of the air in the bathroom, that is, A bathroom temperature sensor 16 for detecting the bathroom temperature and a heat exchanger temperature sensor 17 for detecting the temperature of the heat exchanger 13 itself are installed, and an operation switch signal,
While the bathroom set temperature signal, the circulation set air volume signal, etc. are transmitted from the wireless remote controller 18 to the controller 15,
Temperature detection signals from the bathroom temperature sensor 16 and the heat exchanger temperature sensor 17 are output to the controller 15.

The bathroom heater / dryer 1 configured as described above
The driving operation will be described with reference to the flowcharts shown in FIGS. First, as shown in FIG. 2, when the operation switch is turned on (step S1), a preprocess for determining the initial opening of the flow rate control valve 14 is executed (step S2), and the preprocess is determined. The operation of the bathroom heater / dryer 1 is started with the flow rate control valve 14 forcedly opened to the initial opening (step S3). It should be noted that the “opening degree” here is indicated by the number of steps output to the stepping motor that drives the opening / closing of the flow rate adjusting valve 14, and the opening degree of the flow rate adjusting valve 14 increases as the number of steps increases. It is supposed to be.

First, the preprocessing for determining the initial opening of the flow rate control valve 14 will be described with reference to the flowchart shown in FIG. First, when the operation switch is turned on, it is determined whether or not two hours or more have passed since the last operation stop time, that is, whether or not the bathroom temperature at the start of operation is significantly lower than the bathroom set temperature ( (Step S11) If two hours or more have elapsed, the initial opening degree of the flow rate control valve 14 is set to a predetermined fixed opening degree 1 (for example, 64 steps) (Step S12). In addition, this "fixed opening 1" is set to an opening which is assumed to be capable of supplying the rated amount of hot water for the bathroom heating / drying machine 1 to exert its rated capacity to the heat exchanger 13. .

On the other hand, when the elapsed time is less than 2 hours in step S11, it is determined whether or not the opening degree of the flow rate control valve 14 at the time of the last operation stop is stored (step S13), and the first operation is performed. If the opening information of the flow rate control valve 14 is not stored as in the case of time, or if the stored opening degree information of the flow rate control valve 14 is lost due to a power outage or the like, the initial opening degree of the flow rate control valve 14 is changed. , And a predetermined fixed opening 2 (for example, 50 steps) is set (step S14). Note that this "fixed opening 2" is a smaller opening than the "fixed opening 1" in the closing direction, considering that the bathroom temperature at the start of operation has not dropped significantly from the bathroom set temperature. It is set.

In step S13, when the opening degree of the flow rate control valve 14 at the time of the last operation stop is stored, it is judged whether the elapsed time is less than 30 minutes (step S15), and the elapsed time is determined. If less than 30 minutes,
The initial opening is set to the stored opening of the flow rate control valve 14 at the time immediately before the stop of operation (step S1).
6).

In step S15, the elapsed time is 30
If the elapsed time is less than 45 minutes, it is determined whether the elapsed time is less than 45 minutes (step S17). If the elapsed time is 30 minutes or more and less than 45 minutes, the initial opening degree is stored immediately before being stored. 1 for the opening degree of the flow rate control valve 14 when the operation of
The opening is set by adding 0 step (step S1
8).

In step S17, the elapsed time is 45
If the elapsed time is less than 1 hour, it is determined whether or not the elapsed time is less than 1 hour (step S19). If the elapsed time is 45 minutes or more and less than 1 hour, the initial opening is set immediately before being stored. 1 for the opening degree of the flow rate control valve 14 when the operation of
The opening is set by adding 5 steps (step S2
0), if the elapsed time is 1 hour or more and less than 2 hours,
20 degrees is added to the stored opening degree of the flow rate control valve 14 at the time of the last stop of operation (step S21).

As described above, in the bathroom heater / dryer 1, when the operation is restarted before two hours have passed since the last operation stop time, that is, the bathroom temperature has not dropped significantly from the bathroom set temperature. When the operation is restarted in the state,
Since the opening degree is set based on the opening degree of the flow rate control valve 14 at the time of the immediately preceding stop of operation, that is, the opening degree of the flow rate control valve 14 in the state where the bathroom temperature is maintained at the bathroom set temperature. Compared to the case where the operation is uniformly started from the state in which the flow rate control valve 14 is opened to the preset fixed opening 2, the overshoot of the bathroom temperature with respect to the bathroom set temperature can be prevented, and the bathroom can be reliably operated in a short time. The temperature can be converged to the bathroom set temperature.

In particular, in this bathroom heating / drying machine 1, when the operation is restarted 2 hours after the last operation stop, the elapsed time from the stop of the operation to the restart is long. As the initial opening is gradually changed to the opening direction, the initial opening is set in anticipation of a decrease in the bathroom temperature after the operation is stopped. The bathroom temperature can be converged to the bathroom set temperature.

In this embodiment, the initial opening of the flow rate control valve 14 at the time of restarting the operation is set to a predetermined fixed opening 1 depending on whether or not two hours have passed since the last stop of the operation. Whether or not to set the initial opening based on the opening of the flow rate control valve 14 at the time of the immediately preceding stop of operation, the elapsed time serving as a judgment reference is not limited to 2 hours. It may be appropriately determined in consideration of the temperature rise of the bathroom after the start of operation.

Further, in this embodiment, when the operation is restarted before 2 hours have passed since the last operation stop time, the elapsed time is 30 minutes or more and less than 45 minutes, 45 minutes or more and less than 1 hour, and 1 hour. The initial opening is corrected in the opening direction in three steps, each of which is less than 2 hours. However, the time interval for correcting the initial opening and each opening correction amount are the temperature of the bathroom after the start of operation. It may be appropriately determined in consideration of the increase.

Further, in this embodiment, when the operation is restarted 2 hours after the last operation stop time, the flow control valve 14 is opened at the last operation stop time as the elapsed time becomes longer. The degree is corrected to the opening direction, and the corrected opening is set to the initial opening.
However, the present invention is not limited to this, and when the operation is restarted before 2 hours (predetermined time) have elapsed from the time when the operation was stopped immediately before, the flow control valve 14 at the time when the operation is stopped immediately before is stopped regardless of the elapsed time. It is also possible to set the opening degree of to the initial opening degree.

Further, in this embodiment, the initial opening is set based on the opening of the flow rate control valve 14 at the time of the immediately preceding stop of operation, or a predetermined fixed value depending on the elapsed time from the time of the last stop of operation. Although it is determined whether to set the opening (fixed opening 1), the present invention is not limited to this, and whether the actual bathroom temperature at the start of operation is higher than a predetermined temperature. It is also possible to make a determination based on whether or not the temperature of the heat exchanger 13 at the time of starting operation exceeds a predetermined temperature set in advance. The opening degree of the flow rate control valve 14 at the time of the last stop of operation is corrected, that is, the start of operation, depending on how much the bathroom temperature and the heat exchanger temperature in the above are higher than a predetermined temperature. As the bathroom temperature and the heat exchanger temperature at the point become lower, the opening degree of the flow control valve 14 at the time of the last stop of operation is gradually corrected to the opening direction, and the corrected opening degree is set to the initial opening degree. Good.

Further, even if the operation is stopped, the temperature of the heat exchanger 13 does not drop sharply. Therefore, as in the bathroom heating / drying machine 1, the bathroom temperature sensor 16 has the main body case 1.
In the case where the circulating fan 12 is stopped, the temperature inside the main body case 11 exceeds the bathroom set temperature, and the accurate bathroom temperature cannot be detected. Since the temperature detected by the bathroom temperature sensor 16 often exceeds the bathroom set temperature until a certain amount of time elapses after the operation is stopped, in such a bathroom heating / drying machine, the bathroom temperature (bathroom temperature at the start of operation) Whether the initial opening is set based on the opening of the flow control valve at the time of the last stop of operation, depending on whether the temperature detected by the sensor) is higher than the set temperature of the bathroom, or a predetermined fixed opening. It is also possible to determine whether to set to.

In this way, the bathroom heating / drying machine 1 started to operate with the flow rate control valve 14 forcibly opened to the initial opening determined by the pretreatment, as shown in FIG. The heat exchanger temperature is regulated based on the heat exchanger temperature detected by the exchanger temperature sensor 17 and the regulated temperature of the heat exchanger 13 preset for each circulation set air volume (strong wind, weak wind, slight wind). The heat exchange temperature control for controlling the amount of hot water supplied to the heat exchanger 13 by adjusting the opening degree of the flow rate control valve 14 so that the temperature becomes the temperature, and the bathroom temperature and the bathroom set temperature detected by the bathroom temperature sensor 16. Based on the above, the room temperature control for controlling the amount of hot water to the heat exchanger 13 is executed in parallel by adjusting the opening degree of the flow rate control valve 14 so that the bathroom temperature becomes the bathroom set temperature (step S4). , Step S5), Te, bathroom temperature converges in the bathroom set temperature in a short time, is maintained. The "specified temperature of the heat exchanger 13" when the circulating air volume is set to a strong wind
Is a heat exchanger 1 with a rated hot water volume that exhibits the rated heating capacity.
3 is the temperature of the heat exchanger 13 when supplied to the No. 3, specifically, 62 ° C. for strong wind, weak wind, and slight wind, 5
It is set to 8 ° C and 55 ° C.

First, the heat exchange temperature control described above will be described in detail with reference to the flowchart shown in FIG. As described above, when the operation is started in the state where the flow rate control valve 14 is forcibly opened to the initial opening degree, one minute 30
It is determined whether or not seconds have elapsed (step S31), and the opening degree of the flow rate control valve 14 is maintained at the initial opening degree until 1 minute and 30 seconds have elapsed after the start of operation. As described above, the opening degree of the flow rate control valve 14 is maintained at the initial opening degree for 1 minute and 30 seconds after the start of operation, so that the hot water of the rated temperature is constantly supplied to the heat exchanger 13 from the hot water heating heat source device 20. Then, by starting the adjustment of the opening degree of the flow rate control valve 14, the flow rate control valve 14 does not open more than necessary and the overshoot of the heat exchanger temperature is prevented. be able to. It should be noted that the time for which the flow rate control valve 14 is held at the initial opening after the start of operation is not limited to 1 minute and 30 seconds, and may be appropriately set in consideration of the performance of the hot water heating heat source device 20 to be used. Good.

When 1 minute and 30 seconds have passed after the start of operation,
It is determined whether or not the bathroom temperature has risen to the bathroom set temperature -3 ° C (step S32), and if the bathroom temperature is lower than the bathroom set temperature -3 ° C, then the heat exchanger 13
It is determined whether or not the temperature has been raised to the specified temperature of -3 ° C (step S33). Here, when the temperature of the heat exchanger 13 is lower than the specified temperature −3 ° C., a sufficient hot water amount (rated hot water amount) is not supplied to the heat exchanger 13 at the current opening (initial opening). Therefore, the flow rate control valve 14 is opened step by step every 30 seconds until the bathroom temperature becomes equal to or higher than the bathroom set temperature −3 ° C. (step S3).
4).

On the other hand, in step S32, when the bathroom temperature is raised to the bathroom set temperature -3 ° C or higher, or in step S33, the temperature of the heat exchanger 13 is raised to the specified temperature -3 ° C or higher. If the temperature of the heat exchanger 13 is higher than the specified temperature + 1 ° C (step S35), it is determined whether or not the temperature of the heat exchanger 13 is higher than the specified temperature + 1 ° C. Current opening (initial opening)
In this case, an excessive amount of hot water is supplied to the heat exchanger 13, and there is a high possibility that the bathroom temperature will exceed the bathroom set temperature if this state is continued, so the temperature of the heat exchanger 13 is below the specified temperature + 1 ° C. The flow rate control valve 14 is closed every 30 seconds in two steps until it becomes (step S36).

In step S35, when the temperature of the heat exchanger 13 is equal to or lower than the specified temperature + 1 ° C., it is determined whether or not the temperature of the heat exchanger 13 exceeds the specified temperature (step S37), and the heat exchanger 13 is determined. When the temperature of the heat exchanger 13 is higher than the specified temperature, the flow rate control valve 14 is closed step by step every 30 seconds (step S38), and when the temperature of the heat exchanger 13 is equal to or lower than the specified temperature in step S37. Returns to step S32 and repeats the same operation.

As described above, in the bathroom heater / dryer 1, the opening degree of the flow rate adjusting valve 14 is adjusted so that the temperature of the heat exchanger 13 is maintained at a predetermined temperature which is set in advance. Even when the flow rate characteristic of the flow rate control valve 14 changes due to the capacity of the circulation pump mounted in the hot water heating heat source device 20, the pipe resistance, etc., the rated hot water amount capable of exhibiting the rated capacity at the start of operation can be ensured. It becomes possible to supply the heat to the heat exchanger 13, and as compared with the case where the operation is simply started in a state where the flow rate control valve 14 is opened to a predetermined initial opening degree, the bathroom temperature can be surely set in a short time. The temperature can be raised to near.

In addition, in the bathroom heating / drying machine 1, as described above, the heat exchanger 1 is operated as the circulating air volume decreases.
Since the specified temperature of No. 3 is set to be low, as the blowing speed of the warm air blown from the bathroom heating dryer 1 becomes smaller, the blowing temperature of the warm air also becomes lower. Therefore, the warm air blown from the bathroom heater / dryer 1 to the bathroom is less likely to rise to the upper part of the bathroom, the temperature of the upper part of the bathroom does not become extremely higher than that of the lower part of the bathroom, and the temperature unevenness in the bathroom is minimized. Can be suppressed.

Next, regarding the above-mentioned room temperature control, FIG.
Also, a detailed description will be given with reference to the flowchart shown in FIG. As described above, when the operation is started in the state where the flow rate control valve 14 is forcibly opened to the initial opening degree, as shown in FIG. 5, it is determined whether 1 minute and 30 seconds have elapsed ( In step S41), the opening degree of the flow rate control valve 14 is maintained at the initial opening degree until 1 minute and 30 seconds have elapsed after the start of operation.

When 1 minute and 30 seconds have passed after the start of operation,
It is determined whether or not the bathroom temperature exceeds the heating stop temperature (bathroom set temperature + 2 ° C) (step S42). If the bathroom temperature exceeds the heating stop temperature, the current opening (initial opening) is more than necessary. Since the amount of warm water of 10 is supplied to the heat exchanger 13, the opening degree of the flow rate control valve 14 at the time of the next valve opening (hereinafter referred to as the next initial opening degree) is stored as the current opening degree-10 step (step). S43), flow control valve 1
4 is forcibly closed completely (step S46).

On the other hand, if the bathroom temperature is equal to or lower than the heating stop temperature in step S42, then it is determined whether or not the bathroom temperature is higher than the bathroom set temperature (step S4).
4) If the bathroom temperature is higher than the bathroom set temperature,
Since an excessive amount of hot water is supplied to the heat exchanger 13 at the current opening degree (initial opening degree), the next initial opening degree is stored as the current opening degree-5 steps (step S45), and the flow rate control valve 14 Is forcibly fully closed (step S46).

In this way, after the flow rate control valve 14 is forcibly fully closed, the bathroom temperature is kept as it is until the bathroom temperature becomes equal to or lower than the bathroom set temperature (step S47). When the temperature drops below the temperature, step S4
3. Forcibly open the flow rate control valve 14 until the next initial opening stored in step S45 (step S48),
Control goes to step S41.

On the other hand, in step S44, if the bathroom temperature is equal to or lower than the bathroom set temperature, as shown in FIG. 6, the fuzzy control is performed and the flow rate control valve 14 is opened so that the bathroom temperature becomes the bathroom set temperature. Degree adjustment (step S4
9). In the fuzzy control, a fuzzy inference calculation is executed every predetermined calculation time (for example, 90 seconds), and the opening degree of the flow control valve 14 is adjusted based on the calculation result.

Subsequently, it is judged whether or not the bathroom temperature exceeds the forced heating stop temperature (bathroom set temperature + 3 ° C.) (step S50), and if the bathroom temperature is higher than the forced heating stop temperature, the present opening degree is set. Then, the amount of hot water more than necessary is the heat exchanger 1
Since it has been supplied to 3, the next initial opening,
The present opening degree is stored as -5 steps (step S5
1) Immediately fully close the flow rate control valve 14 (step S
56).

On the other hand, if the bathroom temperature is equal to or lower than the forced heating stop temperature in step S50, it is subsequently determined whether or not the bathroom temperature is higher than the heating stop temperature (step S52), and the bathroom temperature is the heating stop temperature. If it is above 40%, the flow rate control valve 14 is not closed immediately and
The flow rate control valve 14 is closed one step every second (step S53).

Thereafter, it is determined whether 6 minutes have passed since the bathroom temperature exceeded the heating stop temperature (step S
54), the same valve closing operation is repeated until 6 minutes have passed, and if the bathroom temperature is higher than the heating stop temperature even after 6 minutes, the next initial opening is stored as the current opening. (Step S55), the flow rate control valve 14 is forcibly fully closed (Step S56).

In this way, after the flow rate control valve 14 is forcibly fully closed, the bathroom temperature is kept as it is until the bathroom temperature becomes equal to or lower than the bathroom set temperature (step S57). If the temperature drops below the temperature, step S5
1. Forcibly open the flow rate control valve 14 to the next initial opening stored in step S55 (step S58),
Control goes to step S41.

On the other hand, if the bathroom temperature is equal to or lower than the heating stop temperature in step S52, the process proceeds to step S49 and the same operation is repeated.

As described above, in the bathroom heater / dryer 1, when the bathroom temperature is higher than the bathroom set temperature at the time of 1 minute and 30 seconds from the start of operation, the flow rate control valve 1
4 is fully closed immediately, and the next initial opening is set to an opening corrected in the closing direction by a predetermined opening correction amount with respect to the opening immediately before the flow control valve 14 is fully closed. Therefore, even when the preset opening degree of the flow rate control valve 14 is too wide with respect to the bathroom temperature at the start of operation, the flow rate control valve 14 is fully closed and then opened again. Since the opening degree of the flow rate control valve 14 at the time of performing is corrected in the closing direction by the opening degree correction amount with respect to the initial opening degree,
The flow control valve does not repeat ON and OFF operations,
The bathroom temperature can be reliably converged to the bathroom set temperature.

When the bathroom temperature at the time of 1 minute and 30 seconds from the start of the operation is higher than the heating stop temperature, the opening correction amount is set to 10 steps, and the bathroom set temperature, which is lower than the heating stop temperature, is set. If it is higher, the opening correction amount is set to 5 steps, and the opening correction amount is gradually increased as the bathroom temperature rises at the time when a predetermined time (1 minute 30 seconds) has passed from the start of operation. Since it was made larger, the flow rate control valve 1 at the start of operation
According to the degree of excessive opening of No. 4, the next initial opening degree is appropriately set, and the bathroom temperature can be converged to the bathroom set temperature in a short time.

If the bathroom temperature exceeds the forced heating stop temperature even after the operation starts and the fuzzy control is started, the flow rate control valve 14 is immediately fully closed and the next initial opening is set to the flow rate. Since the opening of the control valve 14 is corrected in the closing direction by a predetermined opening correction amount (5 steps) with respect to the opening immediately before the valve is fully closed, the bathroom temperature can be promptly changed after the next opening. Can be set to the bathroom set temperature.

In this embodiment, the opening correction amount is set to 5
Although the number of steps is set to 10 steps, the present invention is not limited to this, and an appropriate value may be appropriately selected and used.

In this way, the operation switch is turned off while the heat exchange temperature control and the room temperature control are being executed in parallel.
When it is F, the operation switch is turned off as shown in FIG.
After the opening degree of the flow rate control valve 14 at the time of the operation is stored (step S6), the operation of the bathroom heating / drying machine 1 is stopped (step S7), and the opening degree stored in step S6 is the value when the operation is restarted. Used to determine the initial opening.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a bathroom heating dryer according to the present invention.

FIG. 2 is a flowchart showing a driving operation of the above bathroom heating / drying machine.

FIG. 3 is a flowchart showing a driving operation (preprocessing) of the bathroom heating dryer of the above.

FIG. 4 is a flowchart showing an operation operation (heat exchange temperature control) of the bathroom heating dryer of the above.

[Fig. 5] Driving operation of the above bathroom heating dryer (room temperature control)
It is a flowchart showing.

[Fig. 6] Driving operation of the above bathroom heating dryer (room temperature control)
It is a flowchart showing.

[Explanation of symbols]

1 bathroom heating dryer 11 body case 12 Circulation fan 13 heat exchanger 14 Flow control valve 15 Controller 16 Bathroom temperature sensor 17 Heat exchanger temperature sensor 18 wireless remote control

Claims (11)

[Claims] 1. A heat exchanger, which is installed in a circulation path for circulating the air in the bathroom and which is circulated and supplied with hot water, and a bathroom temperature, which is installed in a circulation path of the hot water, maintains a bathroom set temperature. And a flow rate control valve for controlling the amount of hot water supplied to the heat exchanger so that the bathroom heater is started in a state where the flow rate control valve is opened to a predetermined initial opening degree. The bathroom heater, wherein the flow rate control valve is controlled so that the temperature of the heat exchanger reaches a predetermined temperature. 2. The flow control valve is maintained at the predetermined initial opening until a predetermined time elapses from the start of operation, and after the predetermined time elapses from the start of operation, the heat exchanger The bathroom heater according to claim 1, wherein the flow rate control valve is controlled so that the temperature reaches a predetermined regulated temperature. 3. The bathroom heater according to claim 1, wherein the specified temperature is set lower as the circulating air volume of the air in the bathroom decreases. 4. A heat exchanger for circulating hot water, which is installed in a circulation path for circulating air in the bathroom, and a bathroom temperature, which is installed in a circulation path of the hot water, kept at a bathroom preset temperature. And a flow rate control valve for controlling the supply amount of hot water to the heat exchanger so as to start the operation in a state where the flow rate control valve is opened to a predetermined initial opening degree, and the flow rate after the operation is started. When fully closing the control valve, the bathroom heater configured to set the opening degree of the flow rate control valve at the time of the next opening based on the opening degree of the flow rate control valve immediately before the full closing. When the bathroom temperature exceeds the bathroom set temperature at the time when a predetermined time has passed from the start of operation, immediately close the flow control valve fully, and open the flow control valve at the next opening. To the opening just before the flow control valve is fully closed. A bathroom heater characterized in that the opening is corrected in the closing direction by a predetermined opening correction amount. 5. When the bathroom temperature is higher than the bathroom set temperature at the time when the predetermined time has elapsed from the start of operation,
The bathroom heater according to claim 4, wherein the opening degree correction amount is increased as the bathroom temperature increases when the predetermined time has elapsed from the start of operation. 6. A heat exchanger for circulating and supplying hot water, which is installed in a circulation path for circulating air in the bathroom, and a bathroom temperature, which is installed in a circulation path of the hot water, maintains a bathroom set temperature. And a flow rate control valve for controlling the amount of hot water supplied to the heat exchanger so as to start the operation in a state where the flow rate control valve is forcibly opened to a predetermined initial opening degree. In the case of a bathroom heater, if the operation is restarted before the lapse of a predetermined time from the time when the operation was stopped immediately before, the opening of the flow control valve at the time when the operation was stopped immediately before is set to the initial opening. A bathroom heater characterized by starting operation. 7. When the operation is restarted before a predetermined time has passed from the time when the operation was stopped immediately before, the initial opening degree is gradually increased as the elapsed time from the time when the operation is stopped until the operation is restarted increases. The bathroom heater according to claim 6, wherein the bathroom heater is corrected in the opening direction. 8. A heat exchanger, which is installed in a circulation path for circulating air in the bathroom and which is circulated and supplied with hot water, and a bathroom temperature, which is installed in a circulation path of the hot water, keeps the bathroom temperature at a bathroom preset temperature. And a flow rate control valve for controlling the amount of hot water supplied to the heat exchanger so as to start the operation in a state where the flow rate control valve is forcibly opened to a predetermined initial opening degree. In a bathroom heater, when the temperature of the heat exchanger at the time of starting operation is higher than a predetermined temperature, the opening of the flow control valve at the time of the last stop of operation is set to the initial opening to start the operation. A bathroom heater characterized in that 9. When the temperature of the heat exchanger at the start of operation is higher than a predetermined temperature, the initial opening is gradually corrected to the opening direction as the temperature of the heat exchanger at the start of operation becomes lower. The bathroom heater according to claim 8. 10. A heat exchanger, which is installed in a circulation path for circulating the air in the bathroom and is circulated and supplied with hot water, and a bathroom temperature, which is installed in a circulation path of the hot water, maintains the bathroom temperature at a bathroom set temperature. And a flow rate control valve for controlling the amount of hot water supplied to the heat exchanger so as to start the operation in a state where the flow rate control valve is forcibly opened to a predetermined initial opening degree. In the bathroom heater, if the bathroom temperature at the start of operation is higher than the predetermined temperature, the opening of the flow control valve at the time of the last stop of operation is set to the initial opening to start the operation. A bathroom heater characterized by this. 11. The method according to claim 10, wherein when the bathroom temperature at the start of operation is higher than a predetermined temperature, the initial opening is gradually corrected toward the opening direction as the bathroom temperature at the start of operation becomes lower. Bathroom heater.