JP2012170782A - Mist atomizing device for bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mist atomizing device for a bath which is capable of simplifying a piping configuration even while evading occurrence of inconvenience such as the early degradation in a heat exchanger for water heating of a water heater.SOLUTION: The mist atomizing device for a bath includes: water heating means 29 for heating water supplied from a water heater D to mist atomizing means B; and mist atomizing amount change means 37 for changing a mist atomizing amount from the mist atomizing means B so as to switch to a large amount atomization state in which a water passing amount of the water heater D becomes equal to or larger than a set amount for combustion and a small amount atomization state in which the water passing amount of the water heater D becomes smaller than the set amount for combustion. The water heater D is configured to supply the water from a water supply path 48 to the mist atomizing means B after making it flow through the heat exchanger 45 for water heating and heating it when the water passing amount is equal to or larger than the set amount for combustion, and to supply the water from the water supply path 48 to the mist atomizing means B by making it flow without passing hot water through the heat exchanger 45 for water heating when the water passing amount is smaller than the set amount for combustion.

Description

  The present invention supplies mist jetting means for jetting mist to the mist bath space, and hot water from a water supply channel heated by a hot water heating heat exchanger heated by a burner and supplied to the mist jetting means, A combustion-type water heater that burns the burner when the hot water flow rate is equal to or greater than a set amount for combustion, and stops combustion of the burner when the hot water flow rate is less than the set amount for combustion; and the water heater Hot water heating means for heating hot water supplied to the mist jetting means, a large amount of jetting state in which the water flow rate of the water heater is equal to or greater than the set amount for combustion, and the water flow rate of the water heater is less than the set amount for combustion The present invention relates to a bath mist ejection device provided with mist ejection amount changing means for changing the mist ejection amount from the mist ejection means so as to switch to a small amount ejection state.

Such a bath mist ejecting apparatus is configured to perform a mist bath by ejecting mist into a mist bath space such as in a bathroom.
Since the mist ejection amount changing means can be switched between the large amount ejection state and the small amount ejection state, for example, the operation is started and the mist bath space is in a state suitable for performing the mist bath. When the temperature is raised in this way, a large amount of hot water heated by the hot water heating heat exchanger of the hot water heater is heated by the hot water heating means and sprayed into the mist bath space by switching to a large amount of jetting state. As a result, the temperature of the mist bath space can be quickly raised.

  In addition, after the temperature of the mist bath space is raised to a state suitable for mist bathing, a small amount of hot water that has not been heated in the hot water heating space of the water heater is heated by hot water heating by switching to a small jetting state. By heating by means and spraying into the mist bath space, the mist bath can be performed while giving a comfortable feeling to the bather.

  In other words, when performing a mist bath, switching to a large amount of ejection may cause discomfort, such as giving the bather a feeling of breathing due to the large amount of mist, but when performing a mist bath, By switching to a small amount ejection state, it becomes possible to perform a mist bath in a comfortable state.

  Incidentally, the hot water heating means for heating the hot water supplied from the water heater to the mist ejecting means is a high temperature (for example, 80 ° C.) heat medium circulated and supplied from the heat source device, and the hot water supplied from the water heater to the mist ejecting means. In many cases, it is configured by using a liquid heat exchanger for exchanging heat with hot water, but the hot water heating means may be configured as an electric heating type equipped with a heater such as an electric heater.

  As a conventional example of such a mist spraying device for baths, in supplying a hot water from a water heater to a mist spraying means in a state where a burner is stopped in a small amount of jetting, hot water is passed through a hot water heating heat exchanger of the water heater. (For example, refer to Patent Document 1 (paragraph [0041]).)

  However, when hot water is passed through the hot water heating heat exchanger of the water heater in a small amount of jetting, the hot water heating heat exchanger of the hot water heater deteriorates early due to the generation of drainage due to the hot water flow. There is a risk of such inconveniences.

  For this reason, in patent document 1, in order to avoid a possibility that the heat exchanger for hot water heating of a hot water heater deteriorates at an early stage, hot water for supplying hot water to the hot water heating means is provided as an invention configuration. A water supply supply state for supplying hot water from the water heater to the hot water heating means, and a water supply supply state for supplying hot water from the water supply passage for the hot water heating means to the hot water heating means. A mist spraying device for a bath which is configured to switch the valve means so as to be in a hot water supply state in a large amount ejection state and in a water supply path supply state in a small amount ejection state. Is disclosed.

  That is, Patent Document 1 describes, as a comparative configuration, a configuration in which hot water flows through a hot water heating heat exchanger of a hot water supply in a small amount ejection state, and in order to avoid the disadvantages of this comparative configuration, an invention configuration The hot water supply means for the hot water heating means is provided, and in a small amount of jetting, the supply of hot water from the hot water heater to the mist jetting means is stopped, and the hot water from the hot water supply means for hot water heating means is The structure which supplies to a mist injection means via a heating means is disclosed.

JP 2006-304871 A

  The bath mist ejection device disclosed as an invention configuration in Patent Document 1 stops supplying hot water from a water heater to the mist ejection means in a small amount of ejection, and hot water from a water supply passage for hot water heating means. Is supplied to the mist ejecting means via the hot water heating means, so that the occurrence of inconveniences such as early deterioration of the hot water heating heat exchanger of the hot water heater can be avoided. It is necessary to dispose a water supply channel, and there is a possibility that the piping configuration as the entire apparatus becomes complicated.

  Incidentally, since the bath mist spraying device disclosed in Patent Document 1 is configured as a hot water heating means as an outdoor unit, it is relatively easy to dispose a water supply channel for the hot water heating means. However, when the inside of the bathroom is used as a mist bath space, generally, the hot water heating means is often disposed on the outer periphery of the bathroom such as the ceiling of the bathroom. The piping work for providing the water supply channel for the heating means is a troublesome and time-consuming work.

  The present invention has been made in view of the above circumstances, and its purpose is to prevent the occurrence of inconveniences such as early deterioration of a hot water heating heat exchanger of a water heater, while the piping configuration is avoided. It is in the point which provides the mist ejection apparatus for baths which can aim at simplification of this.

The bath mist ejecting apparatus of the present invention comprises a mist ejecting means for ejecting mist to the mist bath space;
Hot water from the water supply channel is heated by a hot water heating heat exchanger heated by a burner and supplied to the mist ejecting means, and the burner is burned when the amount of hot water flowing is greater than a set amount for combustion. And when the amount of flowing hot water is less than the set amount for combustion, a combustion type hot water heater that stops combustion of the burner,
Hot water heating means for heating hot water supplied from the water heater to the mist jetting means;
The mist from the mist ejecting means is switched so as to switch between a large amount ejection state where the water flow rate of the water heater is equal to or greater than the set amount for combustion and a small amount eject state where the water flow rate of the water heater is less than the set amount for combustion. A mist ejection amount changing means for changing the ejection amount, and the first characteristic configuration thereof is:
When the hot water flow rate is equal to or greater than the set amount for combustion, the hot water supply device supplies hot water from the water supply passage through the hot water heating heat exchanger to be heated and then supplied to the mist ejecting means; and When the flow rate of hot water is less than the set amount for combustion, the hot water from the water supply channel is made to flow without passing through the hot water heating heat exchanger and supplied to the mist ejecting means. It is characterized by that.

  That is, when the mist ejection amount changing means is switched to the large ejection state, the hot water supply device has a flow rate of hot water exceeding the set amount for combustion, so that hot water from the water supply channel flows through the hot water heating heat exchanger. After heating, it will be supplied to the mist injection means, and when the mist injection amount changing means is switched to the small amount injection state, the hot water supply is less than the set amount for combustion, so The hot water is made to flow without passing through the hot water heating heat exchanger and supplied to the mist ejecting means.

  As described above, in both the large amount ejection state and the small amount ejection state, the hot water from the water heater is supplied to the mist ejection unit, so that it is not necessary to provide a water supply path for the hot water heating unit provided in the conventional example. Therefore, the piping configuration of the entire apparatus can be simplified.

  Further, the hot water supply device supplies hot water from the water supply channel to the mist ejecting means in a state where it does not pass through the hot water heating heat exchanger when the amount of hot water flowing is less than the set amount for combustion. Therefore, even in a small amount of jetted water, although hot water from the water heater is supplied to the mist jetting means, it is possible to suppress the generation of drain in the hot water heating heat exchanger of the water heater. It is possible to avoid inconveniences such as early deterioration of the hot water heating heat exchanger due to drain generation.

  In short, according to the first characteristic configuration of the present invention, it is possible to simplify the piping configuration while avoiding the occurrence of inconvenience such as early deterioration of the hot water heating heat exchanger of the water heater. A bath mist ejection device can be provided.

In addition to the first feature configuration, the second feature configuration of the present invention includes:
The hot water supply device includes a bypass passage for bypassing the hot water heating heat exchanger to flow hot water from the water supply passage, and when the amount of hot water flowing is equal to or greater than the set amount for combustion, Hot water flows through both the hot water heating heat exchanger and the bypass passage, and when the amount of hot water flow is less than the set amount for combustion, hot water from the water supply passage flows only through the bypass passage. It is characterized by being configured.

  That is, when the mist ejection amount changing means is switched to the large ejection state, the hot water supply amount of hot and cold water is equal to or greater than the set amount for combustion, so hot water from the water supply path is converted into a hot water heating heat exchanger and its hot water heating. When the mist injection amount changing means is switched to a small amount injection state, the hot water supply device will pass the amount of hot water flowing through the bypass passage that bypasses the heat exchanger for use and flows hot water from the water supply passage. Is less than the set amount for combustion, the hot water from the water supply passage is made to flow only through the bypass passage that bypasses the hot water heating heat exchanger and flows.

  That is, in a small amount of ejection, hot water from the water supply channel is made to flow only through the bypass channel so that it flows without passing through the hot water heating heat exchanger and is supplied to the mist ejection means. In the jetting state, hot water from the water supply channel is caused to flow through both the hot water heating heat exchanger and the bypass channel, and the hot water heated to a high temperature in the hot water heating exchanger and the low temperature fluid flowing through the bypass channel. Hot water is mixed, and the mixed hot water is supplied to the mist ejection means.

  In a large amount of jetted water, hot water from the water supply channel is caused to flow through both the hot water heating heat exchanger and the bypass channel, so that the entire amount of hot water from the water supply channel is passed through the hot water heating heat exchanger. Compared with the case where it is made to flow, the hot water heating heat exchanger can be made smaller, and the hot water heater can be made smaller.

  In short, according to the second characteristic configuration of the present invention, in addition to the operational effects of the first characteristic configuration, it is possible to provide a bath mist spraying device that can reduce the size of the water heater.

In addition to the first or second feature configuration described above, the third feature configuration of the present invention includes:
The control means for controlling the operation controls the mist ejection amount changing means so as to be in the large quantity ejection state until the operation state switching timing is determined after the operation start command is issued, and the operation state switching is performed. When the timing is determined, the mist ejection amount changing means is controlled so as to be in the small amount ejection state.

  That is, when the operation start command is issued, the control means controls the mist injection amount changing means so as to be in the large quantity ejection state, and when the control means determines the operation state switching timing, the small quantity ejection is performed. The mist ejection amount changing means is controlled so as to be in the state.

  In this way, until the operation state switching timing is determined after the operation start command is issued, the mist injection amount changing means is controlled so as to be in a large amount of ejection state, and if the operation state switching timing is determined, a small amount of ejection is performed. Since the mist ejection amount changing means is automatically controlled so as to be in a state, the operation is started and the temperature of the mist bath space is quickly raised so as to be in a state suitable for performing the mist bath. In addition, after raising the temperature of the mist bath space to a state suitable for mist bathing, it is possible to perform mist bathing without giving any special operation while giving the bather a feeling of comfort. It can be done.

  By the way, the configuration for determining the operation state switching timing was set in consideration of the time required to raise the temperature of the mist bath space so that the elapsed time from the start of operation is in a state suitable for performing the mist bath. When the set time is reached, it is determined that it is the operation state switching timing, and when the temperature detected by the temperature detection sensor that detects the temperature of the mist bath space rises to the setting temperature for operation state switching, the operation state switching timing is reached. A configuration for discriminating that there is a possibility is considered.

  In addition, when the human body detection sensor that detects whether or not a human body is present in the mist bath space detects the human body presence state from the human body non-existing state, it is possible to determine that it is the operation state switching timing. In addition, as a configuration for detecting whether or not a human body is present in the mist bath space, the temperature detection sensor for detecting the temperature of the mist bath space detects and opens the door of the mist bath space. Then, in view of the fact that the mist bath is once lowered and then rises again by entering the mist bath space, it is possible to adopt a configuration in which it is determined that it is the operation state switching timing when the temperature change is detected.

  In short, according to the third characteristic configuration of the present invention, in addition to the operational effects of the first or second characteristic configuration described above, the operation is started and the mist bath space is in a state suitable for performing the mist bath. The special operation is to make the mist bath warm while providing a comfortable feeling to the bather after the temperature of the mist bath is raised to a state suitable for mist bathing. It is possible to provide a bath mist ejecting apparatus that can be appropriately performed without performing the above.

The fourth feature configuration of the present invention is in addition to the third feature configuration,
The water heater is configured to supply hot water to a general hot water tap in addition to the mist ejection means,
A pre-heating temperature detecting means for detecting the temperature of hot water flowing from the water heater to the hot water heating means, and after heating for detecting the temperature of hot water flowing to the mist spraying means after being heated by the hot water heating means Hot water temperature detecting means,
The control means is
Based on the detection information of the hot water temperature detection means after heating, execute a feedback type heating amount control for changing and adjusting the heating amount of the hot water heating means so that the temperature of the hot water becomes the set target temperature, and
In a state where the mist ejection amount changing means is controlled so as to be in the small amount ejection state, it is detected that the water heater has changed from a combustion state to a non-combustion state based on detection information of the pre-heating temperature detection means. Sometimes, feed-forward heating amount control is executed to change and adjust the heating amount of the hot water heating means so as to obtain a preset initial heating amount for non-combustion in preference to the feedback heating amount control. It is characterized by being configured as described above.

  In other words, the control means detects the temperature of the hot water flowing to the mist spraying means after being heated by the hot water heating means in any state where the mist ejection amount changing means is switched to the large quantity ejection state or the small quantity ejection state. Based on the detection information of the hot water temperature detection means after heating, feedback type heating amount control is executed to change and adjust the heating amount of the hot water heating means so that the temperature of the hot water becomes the set target temperature. In both the ejection state and the small amount ejection state, the mist having the set target temperature is ejected from the mist ejection means.

  Further, based on the detection information of the pre-heating temperature detecting means for detecting the temperature of the hot water flowing from the water heater to the hot water heating means in a state in which the control means controls the mist ejection amount changing means so as to be in a small amount ejection state. When it is detected that the water heater has changed from the combustion state to the non-combustion state, the hot water heating means is heated so that the preset initial heating amount for non-combustion is given priority over the feedback-type heating amount control. Since the feed-forward heating amount control that changes and adjusts the amount is performed, the hot water heater that is in a combustion state due to consumption of hot water from the general hot water tap in the small amount ejection state is replaced with the general hot water tap. When consumption of hot water is finished and a non-combustion state occurs, the temperature of the mist can be prevented from greatly decreasing.

  In other words, even when the feed-forward heating amount control is not provided, the hot water supply that is in a combustion state due to consumption of hot water from the general hot water tap in a small amount of jetting consumes hot water from the general hot water tap. When it is finished and the non-combustion state is reached, the temperature detected by the hot water temperature detection means after heating will be lower than the set target temperature, so that the temperature of the hot water becomes the set target temperature by feedback-type heating amount control. However, in this case, the feedback-type heating amount control detects the decrease in the temperature of the hot and cold water temperature detecting means after the heating, and then heats the hot and cold water temperature heating means. Since the amount is changed and adjusted, the temperature of the hot water heated by the hot water heating means and supplied to the mist ejecting means may be greatly reduced temporarily.

  Therefore, in the state where a small amount of water is being ejected, the water heater that has been in a combustion state due to consumption of hot water from the general water tap has been heated, When detected based on the detection information of the previous temperature detecting means, the heating amount of the hot water heating means is changed and adjusted so as to be set to a preset initial heating amount for non-combustion in preference to the feedback-type heating amount control. By executing the feedforward heating amount control, the temperature of the hot water heated by the hot water heating means and supplied to the mist ejection means is suppressed from greatly decreasing.

  Incidentally, the initial heating amount for non-combustion is suitable for setting the temperature of the hot water heated by the hot water heating means to the set target temperature when the hot water heater is in the non-combustion state in a small amount of ejection. The initial heating amount for non-combustion can be determined in advance by experiment, and when the hot water heater is in the non-combusting state in a small amount of jetting, the hot water heating means The heating amount of the hot water heating means adjusted by feedback-type heating amount control so that the temperature of the hot water heated in step 1 becomes the set target temperature may be stored as the initial heating amount for non-combustion.

  In short, according to the fourth characteristic configuration of the present invention, in addition to the operational effects of the third characteristic configuration described above, the temperature of the hot water heated by the hot water heating means and supplied to the mist ejection means is greatly reduced. It is possible to provide a bath mist jetting device that can suppress the above.

In addition to the fourth feature configuration, the fifth feature configuration of the present invention includes:
The control means is
In a state where the mist ejection amount changing means is controlled so as to be in the small amount ejection state, it is detected that the water heater has changed from a non-combustion state to a combustion state based on detection information of the pre-heating temperature detection means. In some cases, the feedforward heating amount control is configured to execute control for changing and adjusting the heating amount of the hot water heating means so as to obtain a preset initial heating amount for combustion. And

  That is, in a state where the control means controls the mist ejection amount changing means so as to be in a small amount ejection state, the fact that the water heater has changed from the non-combustion state to the combustion state based on the detection information of the pre-heating temperature detection means. When detected, in order to execute a control for changing and adjusting the heating amount of the hot water heating means so as to be a preset initial heating amount for combustion as feed-forward heating amount control, When consumption of hot water from the hot water tap is started and the water heater is changed from the non-combustion state to the combustion state, it is possible to suppress the temperature of the mist from rising significantly.

  In other words, even when the feed-forward heating amount control is not provided, when the hot water heater is in a combustion state due to consumption of hot water from a general hot water tap in a small amount of ejection, detection of the hot water temperature detecting means after heating Since the temperature rises higher than the set target temperature, the heating amount of the hot water heating means is changed and adjusted so that the temperature of the hot water becomes the set target temperature by feedback type heating amount control. In this case, the feedback-type heating amount control is to change the heating amount of the hot / cold water temperature heating means after detecting an increase in the temperature of the hot / cold water temperature detection means after heating. There is a possibility that the temperature of the hot water supplied to the mist ejecting means will increase greatly temporarily.

  Therefore, in a state where a small amount of water is jetted, hot water is started to be consumed from the general hot water tap, and the fact that the water heater has changed from the non-combustion state to the combustion state is detected based on the detection information of the pre-heating temperature detection means. In this case, the feed-forward heating amount control is executed to change and adjust the heating amount of the hot water heating means so as to obtain a preset initial heating amount for combustion in preference to the feedback heating amount control. The temperature of the hot water heated by the hot water heating means and supplied to the mist ejecting means is suppressed from significantly increasing.

  Incidentally, the initial heating amount for combustion is a heating amount suitable for setting the temperature of the hot water heated by the hot water heating means to the set target temperature when the hot water heater is in the combustion state in a small amount of jetting state. The initial heating amount for combustion can be determined in advance by experiments, and when the hot water heater is in a combustion state in a small amount of jetting, it is heated by hot water heating means. The heating amount of the hot water heating means adjusted by feedback-type heating amount control so that the temperature of the hot water becomes the set target temperature may be stored as the initial heating amount for combustion.

  In short, according to the fifth characteristic configuration of the present invention, in addition to the operational effects of the fourth characteristic configuration described above, the temperature of the hot water heated by the hot water heating means and supplied to the mist ejection means greatly increases. It is possible to provide a bath mist jetting device that can suppress the above.

Schematic configuration diagram of bathroom heating dryer The perspective view which shows the state which installed the bathroom heating dryer in the bathroom Front view of dressing room remote control Schematic configuration diagram of a water heater Flow chart showing control operation

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a bathroom heating dryer equipped with a bath mist spraying apparatus according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the bathroom heating / drying machine operates the apparatus main body 1, the heat source apparatus 2 that circulates and supplies a heat medium, the hot water heater D that supplies hot water by supplying hot water, and the operation of the apparatus main body 1. An operation control unit 3 as a control means for controlling, a bathroom remote controller R1 provided in the bathroom 4 for instructing various operation commands to the operation control unit 3, and an operation control unit 3 provided in a dressing room adjacent to the bathroom 4 And a dressing room remote controller R2 for instructing various control commands.
Incidentally, as shown in FIG. 2, the heat source device 2 and the water heater D are housed in one casing, configured as a hot water source heat source F, and installed outside the bathroom 4 such as outdoors.

As shown in FIG. 2, the apparatus main body 1 is arranged on the back of the ceiling of the bathroom 4 in a state where it is supported by being suspended from a ceiling slab or the like by a hanging metal fitting 5, and its lower surface is an opening of the ceiling plate 6 of the bathroom 4. It is in a state to face.
As shown in FIG. 1, the apparatus main body 1 includes a circulation fan 7 for circulating and circulating the air in the bathroom 4, and an air conditioning heat exchanger 8 for heating the air that is ventilated by the circulation fan 7. A ventilation fan 9 and the like for ventilating the bathroom 4 are provided, and these devices are installed in the main casing 12.

A grill plate 13 is installed below the main body casing 12 so as to be positioned on the surface side of the ceiling of the bathroom 4. The grill plate 13 includes three mist nozzles 11 as mist ejection means B. It has been.
Hot water from the water heater D is supplied to the three mist nozzles 11 through the hot water supply passage 10, and the three mist nozzles 11 mist the hot water into the bathroom space K as a mist bath space. It is configured to spout.

The grill plate 13 is provided with an air inlet 14 and an air outlet 15. Circulating ventilation for sucking air in the bathroom 4 through the air inlet 14 and blowing it out through the air outlet 15 is provided inside the main body casing 12. A path 16 is formed.
The circulation fan 7 is provided in the circulation ventilation path 16 so as to ventilate the air in the bathroom sucked from the air inlet 14 into the bathroom 4 through the outlet 15.

The heat exchanger 8 for air conditioning is provided in the circulation ventilation path 16 on the upstream side of the circulation fan 7 in the ventilation direction, and heat exchange with the heat medium circulated and supplied from the heat source unit 2 is performed in the circulation ventilation path 16. It is configured to heat the air to be ventilated.
Therefore, the air in the bathroom 4 sucked through the air inlet 14 is heated by the air conditioner heat exchanger 8 and then blown into the bathroom through the air outlet 15 by the ventilation action of the circulation fan 7. Thus, the inside of the bathroom 4 is heated.
Incidentally, the heat exchanger for air conditioning 8 is configured in a form in which a pair of upper and lower heat exchanger portions are arranged in an L shape.

The heat source device 2 is connected to a heat medium circulation path 17 that circulates and flows a heat medium (specifically, heated hot water), and the forward path 18 of the heat medium circulation path 17 includes two first heat medium branch paths. 19 and the second heat medium branch path 20.
Of the first heat medium branch path 19 and the second heat medium branch path 20, the first heat medium branch path 19 is connected to a liquid heat exchanger 29 described later, and the second heat medium branch path 20 is heat exchange for air conditioning. Connected to the device 8.

  The downstream side of the heat exchanger 8 for air conditioning in the second heat medium branch path 20 is connected to the return path 21 of the heat medium circulation path 17, and the second heat medium branch path 20 includes the second heat medium branch path. There is provided a thermal valve 22 that can open and close the heat medium to the air conditioner heat exchanger 8 by opening and closing 20.

In other words, the heat medium (for example, 80 ° C.) heated by the heat source device 2 is circulated and supplied to the air conditioning heat exchanger 8 through the heat medium circulation path 17, and the heat valve 22 is opened and closed. The supply of the heat medium to the air conditioner heat exchanger 8 is configured to be intermittent.
Incidentally, in this embodiment, the bathroom heating means A for heating the bathroom 4 is constituted by the circulation fan 7, the heat exchanger 8 for air conditioning, the heat medium circulation path 17, the heat valve 22 and the like.

A bathroom configured using a thermistor as a bathroom temperature detecting means for detecting the temperature of the flowing air as the temperature in the bathroom 4 at a location upstream of the air-conditioning heat exchanger 8 in the circulation ventilation path 16. A temperature detection sensor 23 is provided.
The blower outlet 15 is provided with a movable louver 24 that is swingably driven by an electric motor (not shown), and the movable louver 24 can change the blowing direction of the air blown from the blower outlet 15. It is configured.

  The grill plate 13 is formed with a ventilation inlet 9A, and the ventilation fan 9 is provided so as to suck air in the bathroom 4 from the ventilation inlet 9A and exhaust it to the outside through the exhaust duct 25. Due to the ventilation action of the ventilation fan 9, the air in the bathroom 4 is discharged to the outside through the exhaust duct 25, so that the bathroom 4 is ventilated.

  Three mist nozzles 11 are equipped at locations corresponding to the space between the ventilation inlet 9A and the outlet 15 in the grill plate 13 with the hot water jetting direction, that is, the mist jetting direction downward, A hot water supply unit 26 that supplies hot water for mist to these three mist nozzles 11 is provided at the upper part of the main casing 12.

The hot water supply unit 26 includes a mist casing 27 placed on the upper portion of the main body casing 12, and is configured to be equipped with equipment for mist ejection in the mist casing 27.
Specifically, the equipment installed in the mist casing 27 is a hot water supply valve 28 for opening and closing the hot water supply path 10 extending from the hot water heater D, and hot water flowing through the hot water supply path 10 is circulated and supplied from the heat source device 2. A liquid exchanger 29 as hot water heating means for heating by heat exchange with the heat medium (specifically hot water) to be heated, and a lower-side flow through which hot water heated by the liquid heat exchanger 29 flows. The passage 30 is composed of a discharge passage 31 for discharging hot water branched from the lower-side passage 30, a drain valve 32 that opens and closes the discharge passage 31, and a thermistor. The heated hot water temperature sensor 33A as a heated hot water temperature detecting means for detecting the temperature of hot water to be heated and a thermistor are used to pass a portion located on the upper side of the liquid heat exchange 29 in the hot water supply passage 10. Before heating to detect the temperature of flowing hot water Prior to heating as a water temperature detection means is a hot water temperature sensor 33B or the like.
Incidentally, the liquid heat exchanger 29 is configured using a plate heat exchanger.

A mist supply path 34 is connected to a lower side flow path 30 through which hot water heated by the liquid heat exchanger 29 flows, and is branched from the discharge path 31, and the mist supply path 34 is A mist supply path 34 that extends into the main body casing 12 and extends into the main body casing 12 is branched into two first branch paths 35 and a second branch path 36.
Of these first and second branch paths 35, 36, one of the three mist nozzles 11 is connected to the first branch path 35, and three mist nozzles 11 are connected to the second branch path 36. Two of them are connected.

The first and second branch passages 35 and 36 are provided with first and second mist opening / closing valves 37 and 38, respectively, that can freely and continuously supply hot water to the mist nozzle 11.
When the first and second mist opening / closing valves 37 and 38 are opened, a large amount of mist is ejected from the three mist nozzles 11 serving as mist ejecting means (for example, 4 L / min). When the first mist opening / closing valve 37 is closed and the second mist opening / closing valve 38 is opened among the second mist opening / closing valves 37, 38, a small amount is generated from one of the three mist nozzles 11 serving as the mist ejection means. A small amount of mist is ejected (for example, 1 L / min).

Therefore, in the present embodiment, the first mist opening / closing valve 37 functions as a mist ejection amount changing means for changing the mist ejection amount from the mist nozzle 11 so as to switch between the large ejection state and the small ejection state. Become.
Further, in the present embodiment, hot water from the water heater D is used as a mist ejecting means by the hot water supply path 10, the lower side flow path 30, the mist supply path 34, and the first and second branch paths 35 and 36. The hot water supply flow path Y supplied to the mist nozzle 11 is configured, and the liquid heat exchanger 29 functions as hot water heating means for heating the hot water supplied to the mist nozzle 11 as described above.

As described above, the first heat medium branch path 19 branched from the forward path 18 of the heat medium circulation path 17 is connected to the liquid heat exchanger 29, and the liquid heat exchanger 29 of the first heat medium branch path 19 is connected to the liquid heat exchanger 29. The downstream side is connected to the return path 21 of the heat medium circulation path 17.
Therefore, the heat medium (for example, 80 ° C.) heated by the heat source device 2 is circulated and supplied to the liquid-liquid heat exchanger 29 through the heat medium circulation path 17.

The first heat medium branch path 19 has a heat medium flow rate adjustment valve 39 that can freely open and close the first heat medium branch path 19 and can change and adjust the flow rate of the heat medium to the liquid-to-liquid heat exchanger 29. It is provided as a heating amount adjusting means for adjusting the heating amount of the heat exchanger 29.
The forward path 18 of the heating medium circulation path 17 is provided with a heating medium temperature detection sensor 40 configured using a thermistor as a heating medium temperature detecting means for detecting the temperature of the flowing heating medium.

  The drainage channel 31 branched from the lower side passage 30 connected to the lower side of the liquid heat exchanger 29 is hot water supply when the mist operation has not been performed for a long time since the mist operation was performed last time. The hot water is stored in the passage 10 or in the internal pipe of the liquid-liquid heat exchanger 29. The hot water is discharged to the outside and fresh hot water is supplied to the mist nozzle 11. Is performed by switching the hot water supply valve 28 and the drain valve 32 to the open state while maintaining the first and second mist open / close valves 37 and 38 in the closed state.

  Therefore, in the present embodiment, the drainage passage 31 and the drain valve 32 constitute the drainage means H that drains the hot water supplied through the hot water supply flow path Y without supplying it to the mist nozzle 11. Become.

  As shown in FIG. 4, the water heater D includes a hot water supply part D1 for heating and supplying hot water to be supplied, a control means D2 for controlling the operation of the hot water supply part D1, and various controls for the control means D2. A remote control operation unit D3 for instructing information is provided.

The hot water supply unit D1 includes a combustion chamber 1, and in the combustion chamber 1, a hot water heating heat exchanger 45 for water heating, a gas combustion burner 46 for heating the hot water heating heat exchanger 45, and The burner 46 is provided with a fan 47 for ventilating combustion air.
For example, a water supply channel 48 to which water is supplied from, for example, a household water supply is connected to the inlet side of the hot water heating heat exchanger 45, and hot water after heating is connected to the outlet side of the hot water heating heat exchanger 45. A hot water outlet 49 for hot water is connected to each other.

  The water supply channel 48 is provided with a water flow rate sensor 50 as a water flow rate detecting means for detecting the water flow rate Qo, and a water inlet temperature thermistor 51 as a water inlet temperature detecting means for detecting the water inlet temperature Tc. 49 is provided with a tapping temperature thermistor 52 as a tapping temperature detecting means for detecting a tapping temperature Tdo of tapping hot water discharged from the hot water heating heat exchanger 45.

The water supply path 48 and the hot water supply path 49 are connected by a bypass path 53 that bypasses the hot water heating heat exchanger 45, and the hot water supply described above is provided downstream of the connection portion of the bypass circuit 53 in the hot water supply path 49. A hot water supply passage 10 for supplying hot water is connected to the unit 26, and a general hot water supply passage 10 A for supplying hot water to the general hot water tap 54 is branched to the hot water supply passage 10.
Accordingly, the hot water discharged from the hot water heating heat exchanger 45 and the water supplied from the bypass passage 53 are mixed, and the mixed hot water sprays mist into the mist bath space K. Or it is configured to supply hot water to the general hot water tap 54.

A mixing valve 55 as a mixing means for changing and adjusting the mixing ratio of hot water discharged from the hot water heating heat exchanger 45 and water supplied from the bypass passage 53 at the junction of the bypass passage 53 and the hot water supply passage 49. Is provided.
When the water flow rate exceeds the heating capacity of the water heater D, the hot water after being mixed by the water proportional valve 56 and the mixing valve 55 for reducing the water flow rate when the water flow rate exceeds the heating capacity of the water heater D. A hot water supply temperature thermistor 57 is provided as hot water supply temperature detection means for detecting the hot water supply temperature Tm.

  The mixing valve 55 is configured to change and adjust the mixing ratio between the hot water discharged from the hot water passage 49 and the water supplied from the bypass passage 53 using a stepping motor (not shown). The control means D2 is configured to adjust the mixing ratio by operating the stepping motor.

The fuel supply path 58 for the burner 46 includes an electromagnetically operated intermittent valve 59 for intermittently supplying the fuel gas, and an electromagnetically operated gas amount adjusting valve capable of changing and adjusting the fuel supply amount (burning amount of the burner 46). In the vicinity of the burner 46, an igniter 61 that performs an ignition operation on the burner 46 and a frame rod 62 that detects whether or not the burner 46 has been ignited are provided.
Then, the control means D2 controls the operation of the intermittent valve 59, the gas amount adjusting valve 60, and the igniter 61 to adjust the point fire extinguishing control for igniting and extinguishing the burner 46, and the combustion amount of the burner 46. The combustion amount adjustment control is performed, and the ignition of the burner 46 is confirmed based on the detection information of the frame rod 62.

  The remote control operation unit D3 has a function of commanding start and stop of the operation of the hot water supply unit D1, a function of changing and setting the target hot water supply temperature Ts, and the like.

  The control means D2 burns the burner 46 when the water flow rate Qo detected by the water flow rate sensor 50 is equal to or greater than the combustion set amount, so that the hot water supply temperature Tm of the hot water supply passage 10 becomes the target hot water supply temperature Ts. The hot water supply control for adjusting the combustion amount of 46 and the mixing ratio of the mixing valve 55 is executed, and the combustion of the burner 46 is stopped when the water flow amount Qo detected by the water flow amount sensor 50 is less than the set amount for combustion. It is configured.

When the amount of mist ejected from the mist nozzle 11 is switched to the large amount ejection state, the water flow amount Qo is equal to or greater than the combustion set amount, and when the amount is switched to the small amount ejection state, the water flow amount Qo is the combustion setting. It is configured to be less than the amount.
Incidentally, even when a small amount is ejected, when hot water is consumed by the general hot-water tap 54, it goes without saying that the water flow rate Qo becomes equal to or greater than the set amount for combustion.

  In addition, when the water flow amount Qo detected by the water flow amount sensor 50 is equal to or greater than the combustion set amount, the control means D2 passes hot water from the water supply passage 48 through both the hot water heating heat exchanger 45 and the bypass passage 53. When the water flow amount Qo detected by the water flow amount sensor 50 is less than the combustion set amount, the mixing valve 55 is controlled so that hot water from the water supply passage 48 flows only through the bypass passage 53. It is configured as follows.

  That is, when the water flow rate Qo detected by the water flow rate sensor 50 is less than the set amount for combustion, the mixing valve 55 is connected to the hot water heating heat exchanger so that hot water from the water supply channel 48 flows only through the bypass channel 53. When the water flow amount Qo detected by the water flow amount sensor 50 is equal to or larger than the set amount for combustion, the hot water supply control described above is performed. Therefore, the mixing valve 55 is switched to a state in which hot water from the water supply passage 48 flows through both the hot water heating heat exchanger 45 and the bypass passage 53.

  There are various forms of hot water control executed by the control means D2, but in this embodiment, the hot water discharge temperature Tdo in the hot water supply passage 49 is set to the target hot water temperature Tds (for example, 60 ° C.). In this embodiment, the combustion amount of the burner 46 is controlled, and the mixing ratio of the mixing valve 55 is controlled so that the hot water supply temperature Tm of the hot water supply passage 10 becomes the target hot water supply temperature Ts.

The combustion amount of the burner 46 is controlled by feedforward control and feedback control.
More specifically, it is assumed that the water flow rate Qo from the water supply channel 48 branches α × Qo to the hot water heating heat exchanger 45 side and branches to the bypass channel 53 side at a ratio of β × Qo (however, , Α + β = 1), and the control means D2 heats water of the amount of α × Qo at the incoming water temperature Tc by the heat exchanger 45 for hot water heating as the combustion amount of the burner 46 by feedforward control, thereby allowing the hot water outlet 49 The amount of combustion for making the hot water temperature Tdo from the target hot water temperature Tds (for example, 60 ° C.) become the target hot water temperature.

Further, the control means D2 uses the detected temperature Tdo of the hot water temperature thermistor 52 as the target hot water temperature Tds based on the deviation between the detected temperature Tdo of the hot water temperature thermistor 52 and the target hot water temperature Tds as the combustion amount of the burner 46 by feedback control. The amount of combustion for making it become will be calculated | required.
Then, the control means D2 obtains the target combustion amount Ip obtained by adding the combustion amount by the feedforward control and the combustion amount by the feedback control, and adjusts the opening of the gas amount adjusting valve 60 so as to be the target combustion amount. Will do.

  The mixing ratio of the mixing valve 55 is controlled by the control means D2 from the hot water heating heat exchanger 45 so that the hot water supply temperature Tm from the hot water supply passage 10 approaches the target hot water supply temperature Ts set by the temperature setting switch 17. The mixing ratio α to β of the hot water and the water from the bypass 53 is adjusted.

In the control of the mixing ratio, α and β described above are basically obtained based on the following formula [Equation 1].
Qo × Ts = α × Qo × Tds + β × Qo × Tc ------- [Equation 1]
Incidentally, since α + β = 1, from the above equation [Equation 1],
α = (Ts−Tc) / (Tds−Tc) ------- [Equation 2]
β = (Ts−Tds) / (Tc−Tds) ------- [Equation 3]
Therefore, the value of α or the value of β can be obtained.

Further, α and β described above are corrected based on the deviation between the hot water supply temperature Tm from the hot water supply passage 10 and the target hot water supply temperature Ts set by the temperature setting switch 17.
That is, α and β described above are obtained as target values obtained by correcting the values obtained in Equations 2 and 3 based on the deviation between the hot water supply temperature Tm and the target hot water supply temperature Ts, and the control means D2 performs mixing. The mixing ratio of the mixing valve 55 is adjusted so that the ratio becomes the calculated target value.

As described above, in this embodiment, the combustion amount of the burner 46 and the mixing ratio by the mixing valve 55 are adjusted, and the hot water supply temperature Tm from the hot water supply passage 10 becomes the target hot water supply temperature Ts set by the temperature setting switch 17. It is comprised so that it may become.
When the target combustion amount of the burner 46 exceeds the adjustable maximum value, the control means D2 adjusts the water proportional valve 56 described above to the throttle side.

As shown in FIG. 3, the dressing room remote controller R2 includes a display unit 63 for displaying various information, a mist switch 64 as mist operation command means for instructing mist sauna operation, and a timer for changing and setting the operation time. A setting switch 65, a wind direction switch 66 for instructing a change in the blowing direction of the movable louver 24, a drying switch 67 for instructing a drying operation, a heating switch 68 for instructing a heating operation for heating the bathroom by operating the bathroom heating means A, A ventilation switch 69 for instructing ventilation operation for operating the ventilation fan 9, a cool air switch 70 for instructing cool air operation for operating the circulation fan 7, a stop switch 71 for stopping the operation, and the like are provided.
The bathroom remote controller R1 has the same configuration as the dressing room remote controller R2, although not shown.

The operation control unit 3 includes a microcomputer, and is configured to execute the following various controls.
That is, when a mist operation is commanded by the mist switch 64, the mist operation is performed in which hot water supplied through the hot water supply flow path Y is heated by the liquid exchanger 29 and supplied to the mist nozzle 11. Thus, the heating medium is supplied to the air conditioner heat exchanger 8 in a circulating manner and the circulating fan 7 is operated to heat the interior of the bathroom 4.

When the drying switch 45 is operated, a heat medium is circulated and supplied to the heat exchanger 8 for air conditioning, and the circulation fan 7 and the ventilation fan 9 are operated to heat air containing moisture while heating the interior of the bathroom 4. It is configured to execute a drying operation for exhausting to the outside.
When the heating switch 46 is operated, the heating medium is supplied to the air-conditioning heat exchanger 8 in a circulating manner and the circulating fan 7 is operated to perform a heating operation for heating the interior of the bathroom 4.
When the ventilation switch 47 is operated, the ventilation fan 9 is activated to perform a ventilation operation for ventilating the interior of the bathroom 4.
When the cool air switch 48 is operated, the cooling fan 7 is operated without supplying the heat medium to the air-conditioning heat exchanger 8 and the cool air operation for circulating and flowing the air in the bathroom 4 is executed. .

  When the mist operation is described, the operation control unit 3 is configured so that a large amount of ejection is performed until the operation state switching timing is determined after the operation start command for the mist operation is instructed by the mist switch 64. When the mist opening / closing valve 37 and the second mist opening / closing valve 38 are controlled to be opened and the operation state switching timing is determined, the first mist opening / closing valve 37 is closed so that a small amount is ejected. 38, and when the elapsed time from the start of operation reaches the operation time set in the timer setting switch 65 or when the stop switch 71 is instructed to stop the operation. The mist operation is stopped.

  In this embodiment, the operation state switching timing is set to a timing at which the elapsed time from the start of operation reaches a preset setting time (for example, 10 minutes) for start-up determination.

  When the operation control unit 3 starts the mist operation, the temperature of the hot water heated by the liquid heat exchanger 29 is set to a set target temperature (for example, based on the detection information of the detection means of the hot water temperature sensor 33A after heating). 65 ° C.), feedback type heating amount control is performed in which the heating medium flow rate adjustment valve 39 adjusts the heating medium flow rate to change and adjust the heating amount of the liquid heat exchanger 29. It is configured.

  Then, the operation control unit 3 uses the detection information of the pre-heating temperature detection sensor 33B in a state in which the first mist open / close valve 37 is closed and the second mist open / close valve 38 is opened so that a small amount is ejected. Based on this, when it is detected that the water heater D has changed from the combustion state to the non-combustion state, the initial heating amount for non-combustion set in advance is given priority over the feedback-type heating amount control described above. Feed forward heating amount control is performed to change and adjust the heating amount of the hot water heating means.

  Further, the operation control unit 3 uses the detection information of the pre-heating temperature detection sensor 33B in a state in which the first mist opening / closing valve 37 is closed and the second mist opening / closing valve 38 is opened so that a small amount is ejected. Based on this, when it is detected that the water heater D has changed from the non-combustion state to the combustion state, the heat medium flow rate adjustment valve is set so as to obtain a preset initial heating amount for combustion as feed-forward heating amount control. The control of changing the heating amount of the liquid heat exchanger 29 by adjusting the flow rate of the heat medium by 39 is executed.

  That is, based on the detection information of the pre-heating temperature detection sensor 33B, the consumption of hot water from the general hot water tap 54 is started and the water heater D is changed from the non-combustion state to the combustion state in the small amount ejection state. When detected, the feed-forward heating amount control for changing and adjusting the heating amount of the liquid heat exchanger 29 so as to obtain a preset initial heating amount for combustion is given priority over the feedback heating amount control. By performing this, the temperature of hot water heated by the liquid heat exchanger 29 and supplied to the mist nozzle 11 is prevented from greatly increasing.

  Incidentally, the initial heating amount for combustion refers to the temperature of hot water heated by the liquid heat exchanger 29 when the water heater D is in a combustion state in a small amount of jetting state, and is set to a target temperature (for example, 65 In this embodiment, the initial heating amount for combustion is determined in advance by experiments.

  In addition, the hot water supply D, which was in a combustion state due to consumption of hot water from the general hot water tap 54 in a small amount of ejection, has finished consuming hot water from the general hot water tap 54 and has become non-combusting. Is detected based on the detection information of the pre-heating temperature detection sensor 33B, the liquid-liquid heat exchanger 29 is preferentially set to a preset initial heating amount for non-combustion in preference to the feedback heating amount control. By performing feed forward heating amount control that changes and adjusts the amount of heating, the temperature of the hot water heated by the liquid heat exchanger 29 and supplied to the mist nozzle 11 is suppressed from greatly decreasing. It has become so.

  Incidentally, the initial heating amount for non-combustion is the amount of hot water heated by the liquid heat exchanger 29 when the water heater D is in a non-combusting state in a small amount of jetting state, and is set to a target temperature (for example, , 65 ° C.), and in the present embodiment, the initial heating amount for non-combustion is determined in advance by experiments.

Next, the control operation of the operation control unit 3 in the mist operation will be described based on the flowchart of FIG.
Although not described in the flowchart, when the mist switch 64 is operated, if the elapsed time since the previous mist operation was performed is a set long time, the mist Hot water and water replacement processing for switching the hot water supply valve 28 and the drain valve 32 to the open state while the open / close valves 37 and 38 are maintained in the closed state is performed.

When the mist switch 64 is turned on, an initial operation process is first executed (# 1).
In this initial operation process, the heat source device 2 is operated to set the heat medium in a circulating state, the heat valve 22 is switched to the open state, and the heat medium is circulated and supplied to the air conditioner heat exchanger 8. And the first mist open / close valve 37 and the second mist open / close valve 38 are controlled to open so that the hot water supply valve 28 is opened and a large amount of water is ejected.
In the initial operation process, the heat medium flow rate adjustment valve 39 is not opened and is maintained in the closed state, and the supply of the heat medium to the liquid heat exchanger 29 is maintained in the stopped state.

  Incidentally, when the first mist opening / closing valve 37 and the second mist opening / closing valve 38 are opened, the mist nozzle 11 is ejected in a large amount, and heated hot water (for example, 42 ° C.) is supplied from the water heater D. Will be.

Next, it is determined whether or not the circulation fan 7 is in operation (# 2). If the circulation fan 7 is not in operation, the detection value Tn of the heat medium temperature detection sensor 40 is a first set temperature (for example, 60 ° C.). It is determined whether or not this is the case (# 3).
When the detected value Tn is equal to or higher than the first set temperature, the operation of the circulation fan 7 is started (# 4), and the heating of the bathroom 4 is started. Although not described in detail, at this time, the movable louver 24 is operated to adjust the blowing direction of the air blown from the blower outlet 15.

  That is, since the inside of the bathroom 4 cannot be efficiently heated even when heating is started when the temperature of the heat medium circulated and supplied from the heat source device 2 is low, the temperature of the heat medium is set to the first set temperature (for example, 60 ° C.). ) When the above is reached, the circulation fan 7 is operated to start heating.

Thereafter, it is determined whether or not the ejection state of the mist nozzle 11 has been switched to a small amount ejection state (# 5). If the switching has not been completed, the elapsed time from the start of operation is set as a startup determination time. Is determined (# 6).
When the elapsed time from the start of operation exceeds the set time for start-up determination, the first mist on / off valve 37 is closed and the second mist on / off valve 38 is controlled to open the mist nozzle 11. The ejection state is switched to a small amount ejection state (# 7).

Next, it is determined whether or not the detection value Tn of the heat medium temperature detection sensor 40 is equal to or higher than a second set temperature (for example, 65 ° C.) (# 8).
When the detected value Tn is equal to or higher than the second set temperature (for example, 65 ° C.), the heat medium flow rate adjustment valve 39 is opened, the heat medium is passed through the liquid heat exchanger 29, and the flow rate is increased. The feedback type heating amount control (# 10) and the feed forward type heating amount control (# 13, # 15) are adjusted, and the detection of the heat medium temperature detection sensor 40 is performed at # 8. When it is determined that the value Tn is less than the second set temperature, the process proceeds to # 16.

  The case where it is determined in # 8 that the detection value Tn of the heat medium temperature detection sensor 40 is equal to or higher than the second set temperature (for example, 65 ° C.) will be described in detail. First, the ejection state of the mist nozzle 11 is a small amount. It is determined whether or not it is in a state (# 9).

  If it is determined in # 9 that the ejection state of the mist nozzle 11 is not a small amount ejection state, that is, if it is determined that the ejection state is a large amount ejection state, based on the detection information of the detection means of the hot water temperature sensor 33A after heating. The flow rate of the heat medium is adjusted by the heat medium flow rate adjustment valve 39 so that the temperature of the hot water heated by the liquid heat exchanger 29 becomes a set target temperature (for example, 65 ° C.). Feedback type heating amount control (# 10) for changing and adjusting the heating amount of the heat exchanger 29 is executed.

  When it is determined in # 9 that it is in a small amount ejection state, it is subsequently determined whether or not the water heater D is in a non-combustion state (# 11), and if it is determined that it is in a non-combustion state, It is determined whether it is immediately after switching to the non-combustion state (# 12).

  When it is determined at # 12 that the state is immediately after switching to the non-combustion state, the pre-set initial heating amount for non-combustion is given priority over the feedback heating amount control (# 10). In this way, feed-forward heating amount control (# 13) for changing and adjusting the heating amount of the liquid-to-liquid heat exchanger 29 is executed, and it is determined at # 12 that it is not immediately after switching to the non-combustion state. In this case, feedback-type heating amount control (# 10) is executed.

  If it is determined in # 11 that the state is not the non-combustion state, that is, if it is determined that the water heater D is in the combustion state, it is determined whether or not it is immediately after switching to the combustion state (# 14).

  When it is determined at # 14 that the state is immediately after switching to the combustion state, the initial heating amount for combustion is set in advance, giving priority to the feedback heating amount control (# 10). When the feed forward heating amount control (# 15) for changing and adjusting the heating amount of the liquid heat exchanger 29 is executed, and it is determined at # 14 that it is not immediately after switching to the non-combustion state. Performs feedback-type heating amount control (# 10).

  That is, when the temperature of the heat medium circulated and supplied from the heat source device 2 is low, the hot water from the water heater D cannot be efficiently heated even if the heat medium is caused to flow through the liquid heat exchanger 29. When the temperature reaches a second set temperature (for example, 65 ° C.) or higher, the heating medium flow rate adjustment valve 39 is opened, and the flow of the heating medium to the liquid-to-liquid heat exchanger 29 is started. In order to set the temperature of the hot water heated by the exchanger 29 to a set target temperature (for example, 65 ° C.), feedback type heating amount control (# 10) and feed forward type heating amount control (# 13, # 15) will be performed.

  When it is determined at # 8 that the detected value Tn of the heat medium temperature detection sensor 40 is lower than the second set temperature, or after feedback type heating amount control is executed at # 10, and # 13, # 15, after executing the feedforward heating amount control, it is determined whether or not the elapsed time since the mist operation has been performed has passed the operation time set in the timer setting switch 65 (# 16) When it is determined that the set operating time has elapsed, the first mist open / close valve 37 and the second mist open / close are closed so that the hot water supply valve 28 is closed and a large amount of water is ejected. A stop process for closing the valve 38 and stopping the mist operation is executed (# 18).

  If it is determined in step # 16 that the elapsed operation time has not elapsed, the stop switch 71 determines whether or not an operation stop command has been issued (step # 17). ) When the operation stop is instructed, the # 18 stop process is executed, and when the operation stop is not instructed, the processes from # 2 are repeatedly executed.

  Incidentally, although not described in detail in the present embodiment, after executing the process of # 18, generally, the heating operation and the ventilation operation are performed, and the inside of the bathroom 4 is dried.

[Another embodiment]
Hereinafter, other embodiments are listed.
(1) In the above embodiment, as the hot water heating means for heating the hot water supplied from the water heater to the mist jetting means, the liquid heat exchanger in which the heat medium from the heat source device is circulated and supplied is exemplified. As the means, various forms such as a form heated by an electric heater and a form heated by a heat pump can be applied.

(2) In the above embodiment, the hot water supply device includes a bypass passage that bypasses the hot water heating heat exchanger and flows hot water from the water supply passage, and when the hot water flow rate is equal to or greater than the set amount for combustion, The hot water from the water path flows through both the hot water heating heat exchanger and the bypass path, and when the amount of hot water flow is less than the set amount for combustion, the hot water from the water supply path flows only through the bypass path. Although the specific configuration of the hot water heater can be variously changed, the main point is that when the amount of hot water flowing is greater than or equal to the set amount for combustion, hot water from the water supply channel is replaced with hot water. After flowing and heating through a heat exchanger for heating, it is supplied to the mist jetting means, and when the amount of hot water flowing is less than the set amount for combustion, hot water from the water supply channel passes through the hot water heating heat exchanger. Inaccessible In as long as it is configured to supply the mist spray means to flow.

(3) In the above embodiment, the case where the water heater supplies hot water to the general hot water tap in addition to the mist ejecting means has been exemplified, but the water heater may be implemented only in the form of supplying hot water only to the mist ejecting means. Good.

(4) In the above embodiment, the case where the space in the bathroom is used as the mist bath space is exemplified, but the mist may be ejected to the dedicated mist bath space.

(5) In the above embodiment, the operation state switching timing for switching from the large amount ejection state to the small amount ejection state raises the temperature of the mist bath so that the elapsed time from the start of operation becomes a state suitable for performing the mist bath. The case where it is determined that it is the operation state switching timing when the set time set in anticipation of the time required for the operation is illustrated, but as a configuration for determining the operation state switching timing, the temperature of the mist bath space is detected. When the detected temperature of the temperature detection sensor rises to the set temperature for operation state switching, it may be determined that it is the operation state switching timing.

  In addition, the human body detection sensor that detects whether or not a human body exists in the mist bath space may be configured to determine that it is the operation state switching timing when detecting the human body presence state from the non-human body state, and As a configuration for detecting whether or not a human body exists in the mist bath space, the temperature detected by the temperature detection sensor for detecting the temperature of the mist bath space is determined by the bather opening and closing the entrance door of the mist bath space. In view of the fact that the bath space is lowered and then rises again by entering the bath space, it may be determined that it is the operation state switching timing when the temperature change is detected.

(6) In the above embodiment, the case where the mist ejection amount in the large amount ejection state and the mist ejection amount in the small amount ejection state are determined to be fixed is exemplified, but the mist ejection amount can be changed and adjusted. May be.

(7) In the above embodiment, the case where the mist ejection device is applied to a bathroom heater / dryer with a mist sauna function has been described. However, the mist ejection device may be applied to a mist sauna dedicated device having only the mist sauna function. .

(8) In the above embodiment, the case where the heat source device that supplies the heat medium and the hot water supply device that supplies hot water is configured as one hot water supply heat source device, but the heat source device and the hot water heater are different devices. You may implement with the form comprised as.

3 control means 29 hot water heating means 33A hot water temperature detection means 33B after heating hot water temperature detection means 37 mist injection amount changing means 45 heat exchanger for hot water heating 46 burner 48 water supply path 53 bypass path 54 general hot water tap B mist injection means D Water heater K Space for mist bath

Claims (5)

Mist ejection means for ejecting mist to the mist bath space;
Hot water from the water supply channel is heated by a hot water heating heat exchanger heated by a burner and supplied to the mist ejecting means, and the burner is burned when the amount of hot water flowing is greater than a set amount for combustion. And when the amount of flowing hot water is less than the set amount for combustion, a combustion type hot water heater that stops combustion of the burner,
Hot water heating means for heating hot water supplied from the water heater to the mist jetting means;
The mist from the mist ejecting means is switched so as to switch between a large amount ejection state where the water flow rate of the water heater is equal to or greater than the set amount for combustion and a small amount eject state where the water flow rate of the water heater is less than the set amount for combustion. A mist ejection device for bath provided with a mist ejection amount changing means for changing the ejection amount,
When the hot water flow rate is equal to or greater than the set amount for combustion, the hot water supply device supplies hot water from the water supply passage through the hot water heating heat exchanger to be heated and then supplied to the mist ejecting means; and When the flow rate of hot water is less than the set amount for combustion, the hot water from the water supply channel is made to flow without passing through the hot water heating heat exchanger and supplied to the mist ejecting means. A bath mist sprayer.   The hot water supply device includes a bypass passage for bypassing the hot water heating heat exchanger to flow hot water from the water supply passage, and when the amount of hot water flowing is equal to or greater than the set amount for combustion, Hot water flows through both the hot water heating heat exchanger and the bypass passage, and when the amount of hot water flow is less than the set amount for combustion, hot water from the water supply passage flows only through the bypass passage. The bath mist ejecting device according to claim 1, wherein the bath mist ejecting device is constituted.   The control means for controlling the operation controls the mist ejection amount changing means so as to be in the large quantity ejection state until the operation state switching timing is determined after the operation start command is issued, and the operation state switching is performed. The bath mist spraying device according to claim 1 or 2, wherein the mist spraying amount changing means is controlled so as to be in the small amount spraying state when the timing is determined. The water heater is configured to supply hot water to a general hot water tap in addition to the mist ejection means,
A pre-heating temperature detecting means for detecting the temperature of hot water flowing from the water heater to the hot water heating means, and after heating for detecting the temperature of hot water flowing to the mist spraying means after being heated by the hot water heating means Hot water temperature detecting means,
The control means is
Based on the detection information of the hot water temperature detection means after heating, execute a feedback type heating amount control for changing and adjusting the heating amount of the hot water heating means so that the temperature of the hot water becomes the set target temperature, and
In a state where the mist ejection amount changing means is controlled so as to be in the small amount ejection state, it is detected that the water heater has changed from a combustion state to a non-combustion state based on detection information of the pre-heating temperature detection means. Sometimes, feed-forward heating amount control is executed to change and adjust the heating amount of the hot water heating means so as to obtain a preset initial heating amount for non-combustion in preference to the feedback heating amount control. 4. The bath mist jetting device according to claim 3, which is configured as described above. The control means is
In a state where the mist ejection amount changing means is controlled so as to be in the small amount ejection state, it is detected that the water heater has changed from a non-combustion state to a combustion state based on detection information of the pre-heating temperature detection means. In some cases, the feedforward heating amount control is configured to execute control for changing and adjusting the heating amount of the hot water heating means so as to obtain a preset initial heating amount for combustion. The bath mist ejection device as described.

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