JP6420713B2 - Bathroom heating device and control method of bathroom heating device - Google Patents

Description

  The present invention relates to a bathroom heating device for heating a bathroom and a method for controlling the bathroom heating device.

  Various methods for heating the bathroom have been proposed.

  Patent Document 1 discloses a bath apparatus in which a lattice window is formed on a bath lid and the lattice window is opened and closed by an electric shutter. According to this bath apparatus, a lattice window can be opened before a person enters the bathroom. When the lattice window is opened, the heat (steam) in the bathtub is released into the bathroom, and the bathroom can be warmed.

  Patent Document 2 discloses a mist sauna system configured to branch a mist pipe from a hot water replenishment pipe in a bathtub and to open the tip of the mist pipe to a wall surface of a bathroom. According to this system, the hot water in the bathtub can be sprayed on the bathroom as a hot water mist, and the bathroom can be warmed.

Japanese Patent No. 5505585 Japanese Patent No. 4711873

  However, the above-described bath apparatus of Patent Document 1 has a large structure, and the weight of the bath lid becomes heavy, so that the usability is not good.

  Moreover, in the system of patent document 2, the hot water poured in the mist form adheres to the wall surface of a bathroom, and the trace of a water droplet remains. Immediately after the start of spraying, the liquid water that has remained in the mist pipe and is cooled is sprayed, and the bathroom is cooled by spraying.

  The present invention has been made paying attention to such conventional problems. An object of the present invention is to provide a bathroom heating apparatus and a bathroom heating apparatus control method capable of realizing bathroom heating with a simple structure without causing a trace of water droplets to adhere to a wall surface. .

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected, it is not limited to this. Further, the configuration described with reference numerals may be appropriately replaced or improved.

  1st invention is the bath (121) installed in a bathroom (12), the hot water heater (11) which can heat the hot water supplied to the said bathtub (121), and the air of the said bathroom (12), An air mixing mechanism that can be mixed into hot water supplied from the water heater (11), a bathroom temperature detector (1411) that can detect the temperature of the bathroom (12), and whether there is an instruction to perform bathroom heating. If there is an instruction to perform the heating instruction determination unit (S101) and bathroom heating, if the temperature of the bathroom (12) does not reach an appropriate temperature, the aeration mechanism causes the bathtub (121 An air mixing control unit (S304, S305) that mixes the air in the bathroom (12) into the hot water supplied to) and stops the air mixing by the air mixing mechanism when the temperature of the bathroom (12) reaches an appropriate temperature; Bathroom heater with It is.

  2nd invention WHEREIN: When there exists the instruction | indication which performs the hot water temperature detector (113) which can detect the hot water temperature of the said bathtub (121) in the 1st invention, and bathroom heating, the said bathtub When the hot water temperature of (121) has reached the bathroom heating permission temperature and the hot water temperature determination part (S302), and the hot water temperature of the bathtub (121) has not reached the bathroom heating permission temperature, A hot water temperature control unit (S207, S209) for operating the water heater (11) to increase the hot water temperature without executing the air mixing control unit (S304, S305), and the air mixing control A part (S304, S305) is a bathroom heating apparatus performed when the hot water temperature of the said bathtub (121) has reached the bathroom heating permission temperature.

  According to a third invention, in the first or second invention, the air mixing mechanism is configured to reduce a diameter of a part of a passage (1221) through which hot water supplied from the water heater (11) flows. ) And air passages (1223, 140) communicating the passage restriction (a) and the bathroom (12).

  In a fourth aspect based on the third aspect, the air mixing mechanism further includes an air flow rate control valve (142) provided in the air passage (1223, 140), and the air mixing control unit (S304, S305). ) Is a bathroom heater that controls the air flow control valve (142) to adjust the bubble diameter of the air mixed into the hot water.

  In a fifth aspect based on the fourth aspect, the air mixing control unit (S304, S305) reduces the opening of the air flow control valve (142) when reducing the bubble diameter of the air, This is a bathroom heating device that increases the opening of the air flow control valve (142) when the bubble diameter of the air is increased.

  In a sixth aspect based on the first or second aspect, the air mixing mechanism communicates the passage (1221) through which hot water supplied from the water heater (11) flows and the bathroom (12). (1223,140) and an air pump (145) provided in the air passage (1223,140).

  A seventh invention is the bathroom heating device according to the sixth invention, wherein the air mixing mechanism controls the air pump (145) to adjust the bubble diameter of the air mixed into the hot water.

  According to an eighth aspect of the present invention, in any one of the fourth to seventh aspects, the air mixing control unit (S304, S305) causes the bubble diameter of the air mixed in the hot water to warm the bathroom (12). It is a bathroom heating device that controls the bubble diameter to be set in advance so as to be suitable.

  A ninth aspect of the invention is based on any one of the first to eighth aspects, wherein the degree of change in bathroom temperature when air in the bathroom (12) is mixed with hot water supplied to the bathtub (121) is a reference. It is a bathroom heating device having a warning section (S400) that issues a warning when the degree is smaller than the degree.

  A tenth aspect of the invention is the bathroom heating device according to the ninth aspect of the invention, wherein the reference degree is set according to the latest degree of change that did not issue a warning.

  An eleventh aspect of the invention is the bathroom heating device according to the ninth or tenth aspect of the invention, wherein the reference degree is set according to the outside air temperature.

  In a twelfth aspect of the invention according to any one of the ninth to eleventh aspects, the warning section (S400) is configured so that the flow rate of the air flowing through the air passage (1223, 140) is smaller than a reference flow rate. 121) is a bathroom heating device that transmits that the lid is removed.

  In a thirteenth aspect of the present invention, in any one of the ninth to twelfth aspects, the warning unit (S400) may be configured so that if the flow rate of air flowing through the air passage (1223, 140) is greater than a reference flow rate, the bathroom ventilation fan (123) is a bathroom heating device that sends a message to stop.

  In a fourteenth aspect based on any one of the ninth to thirteenth aspects, the warning section (S400) controls the operation of the bathroom ventilation fan (123) in conjunction with an instruction to perform bathroom heating. It is a bathroom heating device that confirms the presence or absence of an interlocking circuit and, if there is a ventilation fan interlocking circuit, transmits that the lid of the bathtub (121) is removed.

  In a fifteenth aspect of the present invention, in any one of the ninth to fourteenth aspects, the warning unit (S400) controls the operation of the bathroom ventilation fan (123) in conjunction with an instruction to perform bathroom heating. It is a bathroom heating device that confirms the presence or absence of an interlocking circuit and, if there is no ventilation fan interlocking circuit, transmits that the presence or absence of the lid of the bathtub (121) and the operation of the bathroom ventilation fan (123) are confirmed.

  In a sixteenth aspect of the invention, in any one of the first to fifteenth aspects, if the temperature of the hot water decreases when the air of the bathroom (12) is mixed into the hot water supplied to the bathtub (121), It is a bathroom heating device having a reheating control unit (S207, S209) for reheating hot water.

  In a seventeenth aspect of the invention, a bathtub (121) installed in a bathroom (12), a water heater (11) capable of heating hot water supplied to the bathtub (121), and air in the bathroom (12) A method of controlling a bathroom heating device having an air mixing mechanism capable of mixing in hot water supplied from a water heater (11) and a bathroom temperature detector (1411) capable of detecting the temperature of the bathroom (12). When there is a heating instruction determination step (S101) for determining whether or not there is an instruction to perform bathroom heating and an instruction to perform bathroom heating, the temperature of the bathroom (12) must reach an appropriate temperature. For example, air in the bathroom (12) is mixed into the hot water supplied to the bathtub (121) by the air mixing mechanism, and air mixing by the air mixing mechanism is performed when the temperature of the bathroom (12) reaches an appropriate temperature. Air mixing system to stop Step (S304, S305) and a control method for a bathroom heater device having a.

  According to this aspect, when there is an instruction to carry out bathroom heating, if the bathroom temperature does not reach the appropriate temperature, the bathroom air is mixed into the hot water supplied to the bathtub, and the bathroom temperature is adjusted to the appropriate temperature. When it reaches, air mixing is stopped, so that the trace of water drops does not adhere to the wall surface, and bathroom heating can be realized with a simple structure.

FIG. 1 is an overall schematic diagram showing a first embodiment of a bathroom heating device according to the present invention. FIG. 2 is a view showing the structure of the intake air flow meter 143 and the circulation fitting 122. FIG. 3 is a main flowchart for explaining the contents of the control executed by the controller of the bathtub heater. FIG. 4 shows a hot water temperature control subroutine. FIG. 5 is a diagram showing a bathroom heating control subroutine. FIG. 6 is a diagram showing an abnormality processing subroutine. FIG. 7 is a diagram showing the contents of the main part (abnormal processing routine) of the second embodiment of the bathroom heating device according to the present invention. FIG. 8 is a diagram showing the contents of the main part (abnormal processing routine) of the third embodiment of the bathroom heating device according to the present invention. FIG. 9 is an overall schematic diagram showing a fourth embodiment of a bathroom heating device according to the present invention.

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

(First embodiment)
FIG. 1 is an overall schematic diagram showing a first embodiment of a bathroom heating device according to the present invention.

  The bathroom heating device 1 of the present embodiment warms the bathroom air by circulating the bathroom air into the bathtub hot water (or circulating hot water). In other words, the bathtub is used as a gas-liquid heat exchanger that exchanges heat between the bathroom air and hot water. A specific structure will be described below.

  First, the water heater 11 used for the bathroom heating device 1 will be described. In addition, the hot water heater 11 demonstrated here is only an example, and can use a general thing suitably.

  The water heater 11 supplies hot water to a bathtub 121 installed in the bathroom 12. The water heater 11 and the bathtub 121 are connected by a hot water pipeline 131 and a return hot water pipeline 132.

  A return hot water pipe 132 is connected to the inlet of the internal pipe 110 of the water heater 11, and a hot water pipe 131 is connected to the outlet of the internal pipe 110. A three-way valve 133 is provided in the middle of the return hot water pipe 132. By switching the three-way valve 133, city water can be taken into the water heater 11. The internal pipe 110 is provided with a bathtub hot water circulation pump 111, a water flow switch 112, a thermistor 113, and a heat exchange device 114 from the inlet side.

  The bathtub hot water circulation pump 111 sucks hot water of the bathtub 121 or city water supplied from the outside and circulates it in the bathtub 121.

  The water flow switch 112 is turned on / off according to the flow of hot water discharged from the bathtub hot water circulation pump 111. Even if the bathtub hot water circulation pump 111 is operated while the bathtub 121 is empty, hot water does not flow. When such a state is detected by the water flow switch 112, the city water is taken into the water heater 11 by switching the three-way valve 133.

  The thermistor 113 detects the temperature of the hot water discharged from the bathtub hot water circulation pump 111.

  The heat exchange device 114 heats the hot water discharged from the bathtub hot water circulation pump 111 by the burner 1141. The heating heat amount of the heat exchange device 114 is appropriately controlled based on the current hot water temperature and the target hot water temperature.

  Hot water discharged from the bathtub hot water circulation pump 111 flows through the water flow switch 112, the temperature is detected by the thermistor 113, is heated by the heat exchange device 114, flows through the hot water pipe 131, and the circulation fitting of the bathtub 121. It circulates by flowing into the bathtub 121 from 122, flowing through the return hot water pipeline 132, and returning to the bathtub hot water circulation pump 111.

  Next, the bathroom 12 will be described.

  An air intake port 141 of the air conduit 140 opens on the wall surface 12 a of the bathroom 12. Further, the opposite end of the air pipe 140 is connected to the circulation fitting 122 of the bathtub 121. A thermistor 1411 for detecting the temperature of the air in the bathroom 12 is disposed at the air intake port 141 of the air conduit 140. An air flow control valve 142 and an intake air flow meter 143 are provided in the middle of the air conduit 140. The air flow rate control valve 142 adjusts the amount of air flowing through the air conduit 140 according to the opening degree. The intake air flow meter 143 measures the flow rate of air flowing through the air conduit 140. A bathroom ventilation fan 123 is installed on the ceiling of the bathroom 12.

  FIG. 2 is a view showing the structure of the intake air flow meter 143 and the circulation fitting 122.

  Next, the structure of the intake air flow meter 143 and the circulation fitting 122 will be described with reference to FIG.

  Although various types can be used as the intake air flow meter 143, a throttle type flow meter can be given as an example. In this throttle type flow meter, a throttle b is formed in the internal passage 1431 of the intake air flow meter 143. A float chamber 1433 is communicated with the throttle b through a communication path 1432. A float 1434 is built in the float chamber 1433. With such a structure, when air flows into the internal passage 1431 of the intake air flow meter 143, a negative pressure is generated in the throttle portion b, and the float 1434 in the float chamber 1433 is sucked and floated. By detecting the position of the float 1434 at this time, the flow rate of the air flowing through the intake air flow meter 143 can be detected. The position of the float 1434 can be detected using a known sensor such as a magnetic sensor (MR sensor) or an optical sensor. The intake air flow meter 143 described here is only an example, and a general one can be used as appropriate.

  Inside the circulating metal fitting 122, a hot water passage 1221 and a return hot water passage 1222 are formed. To the hot water passage 1221, the hot water pipeline 131 is connected. A return hot water passage 1322 is connected to the return hot water passage 1222. And the passage hot water passage 1221 is formed with a passage constriction part a for reducing the diameter of a part of the passage. An air passage 1223 opens in the passage restricting portion a. An air conduit 140 is connected to the air passage 1223. Due to such a structure, when hot water flows in the hot water passage 1221, a negative pressure is generated in the passage throttle portion a, and the air in the bathroom 12 is sucked, and air is mixed into the hot water. In addition, as a method of mixing air into hot water, there are a method of mixing a microbubble having a small bubble diameter and a method of a jacuzzi having a large bubble diameter. In the case of the present application, the latter method is used. This is because if the former is used, even if air is mixed in the hot water, the bubble diameter is small (the resistance is large) relative to the volume (buoyancy), so it does not come out of the hot water (it keeps floating in the water).

  As described above, the air flow rate control valve 142 is provided in the middle of the air conduit 140. When the opening degree of the air flow control valve 142 is reduced, the amount of air flowing through the air pipe 140 is reduced, and the amount of air mixed into the hot water is reduced. Then, the bubble diameter of the air mixed in the hot water becomes small. When the opening degree of the air flow rate control valve 142 is increased, the amount of air flowing through the air conduit 140 increases and the amount of air mixed into the hot water increases. Then, the bubble diameter of the air mixed in the hot water is increased.

  Using the bathroom heating device having the basic structure as described above, the bathroom air is warmed by the following control. Hereinafter, specific control contents will be described.

  FIG. 3 is a main flowchart for explaining the contents of the control executed by the controller of the bathtub heater. This control is repeatedly executed at a predetermined time cycle.

  Then, with reference to FIG. 3, control of the bathtub heater is demonstrated.

  In step S101, the controller determines whether or not the heating switch of the remote control device has been operated. If the determination result is affirmative, the controller proceeds to step S102, and if the determination result is negative, the controller proceeds to step S200.

  In step S102, the controller determines whether or not the heating switch is on. If the determination result is positive, the controller proceeds to step S103, and if the determination result is negative, the controller proceeds to step S104.

  In step S103, the controller turns on the heating flag.

  In step S104, the controller turns off the heating flag.

  In step S200, the controller executes hot water temperature control. Specific control contents will be described later.

  In step S300, the controller executes bathroom heating control. Specific control contents will be described later.

  FIG. 4 shows a hot water temperature control subroutine.

  Next, hot water temperature control will be described with reference to FIG.

  In step S201, the controller determines whether or not the heating flag is on. If the determination result is positive, the controller proceeds to step S202. If the determination result is negative, the controller exits the process.

  In step S202, the controller operates the bathtub hot water circulation pump 111.

  In step S203, the controller determines whether or not the water flow switch 112 is turned on. If the determination result is negative, the controller proceeds to step S204. If the determination result is positive, the controller skips step S204 and proceeds to step S205.

  In step S204, the controller turns on the automatic operation switch.

  In step S205, the controller determines whether or not the automatic operation switch is on. If the determination result is negative, the controller proceeds to step S206, and if the determination result is positive, the controller proceeds to step S209.

  In step S206, the controller determines whether or not the bath water temperature is an appropriate temperature (a preset target temperature) based on the output signal of the thermistor 113. If the determination result is negative, the controller proceeds to step S207. If the determination result is positive, the controller proceeds to step S208.

  In step S207, the controller activates the heat exchange device 114 to perform rebirth.

  In step S208, the controller stops chasing.

  In step S209, the controller executes automatic bath operation. Here, the automatic bath operation refers to supplying hot water to an appropriate amount, and then determining whether or not the bath water temperature is appropriate based on the output signal of the thermistor 113 while operating the bath water circulation pump 111 at a predetermined timing. If the bath water temperature is low, the heat exchanging device 114 is actuated to retreat.

  In step S210, the controller determines whether or not a predetermined time (for example, 4 hours) has elapsed since the start of automatic bath operation. If the determination result is negative, the controller temporarily exits the process, and if the determination result is positive, the controller proceeds to step S211.

  In step S211, the controller turns off the automatic operation switch and turns off the heating flag. That is, when a predetermined time (for example, 4 hours) has elapsed since the start of automatic bath operation, the automatic operation switch is forcibly turned off to end the automatic operation.

  FIG. 5 is a diagram showing a bathroom heating control subroutine.

  Next, bathroom heating control will be described with reference to FIG.

  In step S301, the controller determines whether or not the heating flag is on. If the determination result is positive, the controller proceeds to step S302, and if the determination result is negative, the controller exits the process.

  In step S302, the controller determines whether or not the bath water temperature has reached the bathroom heating permission temperature. If the determination result is positive, the controller proceeds to step S303, and if the determination result is negative, the controller exits the process.

  In step S303, the controller determines whether or not the bathroom temperature is appropriate. If the determination result is negative, the controller proceeds to step S304, and if the determination result is positive, the controller proceeds to step S305.

  In step S304, the controller opens the air flow control valve 142.

  In step S305, the controller closes the air flow rate control valve 142.

  In step S306, the controller determines whether or not the degree of change in bathroom temperature is smaller than the reference degree. If the determination result is negative, the controller exits the process, and if the determination result is positive, the controller proceeds to step S400.

  In step S400, the controller executes an abnormality process. Specific processing contents will be described later.

  FIG. 6 is a diagram showing an abnormality processing subroutine.

  Next, the abnormality process will be described with reference to FIG.

  In step S401, the controller transmits a warning. This warning may be a voice or a screen display.

  In step S402, the controller closes the air flow control valve 142.

  In step S403, the controller turns off the heating flag. In addition, when there is a circuit (bathroom ventilation fan interlocking relay) that stops the bathroom ventilation fan 123 in accordance with bathroom heating, the bathroom ventilation fan 123 may be started by turning on the relay in step S403.

  Next, the processing of the controller will be described along each scene. In the following description, step numbers of the flowcharts are described as appropriate so that the correspondence with the flowcharts can be easily understood.

(If you need to replenish the hot water in the bathtub)
When the heating switch of the remote control device is turned on, the following processing is performed.

  First, the controller processes START → S101 → S102 → S103, and further executes hot water temperature control in step S200. Specifically, since there is hot water in the bathtub after processing S200 → S201 → S202 → S203, step S204 is skipped and the process proceeds to step S205, and thereafter, S206 → S207 is processed. Then, the heat exchanging device 114 is operated to carry out reheating. Furthermore, bathroom heating control in step S300 is executed. Specifically, processing is performed as S300 → S301 → S302, and RETURN is performed until the bath water temperature reaches the bathroom heating permission temperature. As described above, since the above flowchart is repeatedly executed at a predetermined time cycle, in subsequent cycles, START → S101 → S200 → S201 → S202 → S203 → S205 → S206 → S207 → S300 → S301 → S302 It is processed repeatedly.

  And if bath water temperature reaches bathroom heating permission temperature, it will process as S302-> S303-> S304-> S306. In subsequent cycles, START, S101, S200, S201, S202, S203, S205, S206, S207, S300, S301, S302, S303, S304, and S306 are repeatedly processed.

  If the bath water temperature reaches an appropriate temperature on the way, the chasing is stopped (S206 → S208), and if the hot water temperature falls, the chasing is performed again (S206 → S207). The temperature at which the reheating is stopped at this time may be the bathtub set hot water temperature set by the remote control device (normal bathroom heating mode), but is preferably higher by about 1.5 ° C., for example. As a result of the air that warms the bathtub at this slightly higher temperature, the bathroom is efficiently heated (rapid bathroom heating mode). At this time, the air taken in from the air intake port 141 is humidified as the temperature rises while passing through the bath water. In other words, the temperature of the bathtub water rapidly decreases as a result of not only removing the amount of heat for raising the temperature of the air but also the heat of vaporization. If the hot water temperature falls, it will be retaken again. In the normal bathroom heating mode, reheating is performed again when the bathtub set hot water temperature falls to 1.5 ° C., and in the rapid bathroom heating mode, reheating is performed again when the bath setting hot water temperature is lowered. In the normal bathroom heating mode, bathing may be captured by, for example, raising the bathtub water level (using a pressure sensor), and immediately when the bathing is detected, the bathroom heating may be terminated. In the rapid bathroom heating mode, even if bathing is detected, the bathroom heating is not finished, and the bathroom heating is not finished until the bath setting hot water temperature is lowered. For example, when the bath temperature is 42 ° C., the bath water temperature is 43.5 ° C. = 42 ° C. + 1.5 ° C., and the air from the air inlet 141 is 25 ° C. This is because even when bathing is caught in this case, only 43.5 ° C. hot water hits the skin and feels uncomfortable even though bathing and air at 25 ° C. alternately touch the skin. In order to prevent this, the bathroom heating is not terminated until the bath set temperature is lowered.

  When the bathroom temperature reaches an appropriate temperature, the air flow control valve 142 is closed (S303 → S305), and when the bathroom temperature falls, the air flow control valve 142 is opened again (S303 → S304).

  When the heating switch is turned off, the controller processes START → S101 → S102 → S104 to turn off the heating flag. In the hot water temperature control thereafter, S200 → S201 → RETURN is processed, and in the bathroom heating control, S300 → S301 → RETURN is processed. Therefore, the heating control ends.

  If the bathroom temperature does not rise as expected even though the air flow control valve 142 is open (Yes in S306), an abnormal process is executed (S400), a warning is sent (S401), The air flow rate control valve 142 is closed (S402), and the heating flag is turned off (S403). In the subsequent cycles, the controller executes hot water temperature control and bathroom heating control following S101. In the hot water temperature control, however, processing is performed as S200 → S201 → RETURN. In the bathroom heating control, S300 → S301 → Since RETURN is processed, the heating control is finished in a state where a warning is transmitted.

  Thus, according to the present embodiment, the air flow rate control valve 142 is closed until the bath water temperature reaches the bathroom heating permission temperature, and when the bath water temperature reaches the bathroom heating permission temperature, the air flow control valve 142 is closed. The bathroom air was warmed with the bath water by mixing the bath air with the bath water. If the air flow rate control valve 142 is opened in a state where the bath water temperature is low, the bathroom air is cooled instead, but according to the present embodiment, such a situation can be prevented.

  Also, by mixing the bathroom air into the bathtub hot water, the heat of the bathtub hot water will be transferred to the bathroom air, and the temperature of the bathtub hot water will be lowered. You can take a bath.

(When there is no hot water in the bathtub)
When the heating switch of the remote control device is turned on, the following processing is performed.

  First, the controller processes START → S101 → S102 → S103, and further executes hot water temperature control in step S200. Specifically, processing is performed as S200 → S201 → S202 → S203, and since there is no hot water in the bathtub, the process proceeds to step S204, and thereafter, processing is performed as S205 → S209 → S210, and automatic bathing is performed. Run the operation. About bathroom heating control, since it is the same as that of the above-mentioned "when it is necessary to chase hot water in a bathtub," description is abbreviate | omitted. Then, the automatic operation is continued until a predetermined time (for example, 4 hours) elapses after the automatic operation of the bath is started. When the predetermined time elapses, the automatic operation switch is turned off and the heating flag is turned off (S211). .

  In the subsequent cycles, the controller executes hot water temperature control and bathroom heating control following S101. In the hot water temperature control, however, processing is performed as S200 → S201 → RETURN. In the bathroom heating control, S300 → S301 → Since it is processed as RETURN, the heating control is finished.

  Thus, according to this embodiment, even if the heating switch of the remote control device is turned on in a state where there is no hot water in the bathtub, it is appropriately processed.

  As described above, according to the present embodiment, by mixing the air of the bathroom 12 into the hot water circulating in the bathtub 121, the gas / liquid that exchanges heat between the air of the bathroom 12 and hot water, so to speak. Using it as a heat exchanger, the air in the bathroom 12 was heated. If the hot water is mist-like as in Patent Document 2 described above, traces of water droplets attached to the wall surface of the bathroom remain. However, in this embodiment, the hot water is not sprayed, but the air in the bathroom 12 is mixed with the hot water to warm the air, so that a trace of water droplets does not adhere to the wall surface. Moreover, since mixing of air is controlled according to the temperature of the air of the bathroom 12, the temperature of the bathroom 12 can be adjusted appropriately. Further, since the air in the bathroom 12 is mixed with hot water to warm the air, the humidity of the air in the bathroom 12 increases. High humidity increases energy efficiency because it feels warm even at low temperatures.

  In addition, when the hot water temperature of the bathtub 121 has not reached the bathroom heating permission temperature, the air of the bathroom 12 is not mixed into the hot water, and when the bathroom heating permission temperature is reached, the air of the bathroom 12 is mixed into the hot water. . If the air in the bathroom 12 is mixed in the hot water in a state where the bath water temperature is low, the air in the bathroom 12 is cooled instead, but according to the present embodiment, such a situation can be prevented.

  Furthermore, since a part of the passage 1221 through which hot water supplied from the water heater 11 flows is squeezed and the air passage 1223 is connected to the throttle portion a, when hot water flows through the passage 1221, negative pressure is applied to the throttle portion a. The air in the bathroom 12 is sucked and air is mixed into the hot water. Therefore, air can be mixed into the hot water with a simple structure, and the manufacturing cost can be suppressed.

  Furthermore, an air flow rate control valve 142 is provided in the air passage (air pipe line 140), and by controlling the air flow rate control valve 142, the bubble diameter of the air mixed into the hot water is adjusted. Specifically, when the bubble diameter is decreased, the opening degree of the air flow control valve 142 is decreased, and when the bubble diameter is increased, the opening degree of the air flow control valve 142 is increased. If the bubbles are large, the amount of air increases with respect to the surface area of the bubbles, so the bubbles (air) are difficult to warm. On the other hand, if the bubbles are too small, a so-called microbubble state is created, and the bubbles drift in the hot water forever. Again, the bathroom cannot be warmed. That is, the bubbles have an optimum diameter for warming the bathroom. The optimum diameter and the opening degree of the air flow control valve 142 for obtaining the optimum diameter are obtained in advance through experiments and the like, and the opening degree of the air flow control valve 142 is controlled, so that the effective bubble diameter can be efficiently obtained. The bathroom 12 can be heated.

  In addition, a warning is issued when the temperature of the bathroom 12 does not rise even though the air in the bathroom 12 is mixed with hot water and heated. This can alert the user. Whether or not the temperature of the bathroom 12 has risen is determined based on whether or not the amount of temperature rise (degree of change) after the elapse of a predetermined time from the start of heating is smaller than the reference value. The amount of temperature increase (degree of change) after the elapse of a predetermined time from the start of heating tends to increase from winter to spring. Therefore, the outside air temperature sensor may be used to detect the outside air temperature, and a reference value (reference degree) may be set (corrected) based on the outside air temperature. However, since the daily outside air temperature does not change so much, for example, a warning may be issued if the current temperature rise is small compared to the latest degree of change. In this way, the signal from the outside air temperature sensor becomes unnecessary.

  Moreover, by mixing the bathroom air into the bathtub hot water, the heat of the bathtub hot water will move to the bathroom air, and the temperature of the bathtub hot water will decrease, but according to this embodiment, if the hot water temperature falls, Since reheating is appropriately performed, bathing can be performed at a desired temperature.

(Second Embodiment)
FIG. 7 is a diagram showing the contents of the main part (abnormal processing routine) of the second embodiment of the bathroom heating device according to the present invention. In the following description, parts having the same functions as those described above are denoted by the same reference numerals, and redundant description is omitted as appropriate.

  Next, with reference to FIG. 7, a modified form of the abnormal time process will be described.

  In the first embodiment, when the bathroom temperature does not rise as expected, a warning is transmitted by voice or screen display. On the other hand, in this embodiment, a warning is transmitted more specifically. Specific control contents are as follows.

  In step S4011, the controller determines whether the air flow rate flowing through the air conduit 140 is smaller than the assumed flow rate (reference flow rate) based on the output signal of the intake air flow meter 143. If the determination result is affirmative, the controller proceeds to step S4012. If the determination result is negative, the controller proceeds to step S4013.

  In step S4012, the controller transmits a warning “Take off the bathtub cover” by voice or screen display.

  In step S <b> 4013, the controller transmits a warning “stop the bathroom ventilation fan” by voice / screen display or the like.

  In step S402, the controller closes the air flow control valve 142.

  In step S403, the controller turns off the heating flag.

  In the case where the bathtub is covered, even if the bathroom air is mixed into the bathtub hot water, the lid becomes an obstacle and is not easily released into the bathroom. In this case, the air flow rate flowing through the air conduit 140 is smaller than the assumed flow rate (reference flow rate). Therefore, when such a situation is detected, the user can easily deal with the situation by sending a warning “Taking the lid of the bathtub”.

  If the bathroom exhaust fan 123 is not stopped, the bathroom air is discharged even if the bathroom air is mixed into the bath water, so that the bathroom temperature is unlikely to rise. In this case, the flow rate of air flowing through the air conduit 140 is equal to the assumed flow rate (reference flow rate). Therefore, when such a situation is detected, a warning that “stops the bathroom ventilation fan” is transmitted, so that the user can easily deal with the situation.

(Third embodiment)
FIG. 8 is a diagram showing the contents of the main part (abnormal processing routine) of the third embodiment of the bathroom heating device according to the present invention.

  Next, with reference to FIG. 8, a further modification of the abnormal time process will be described.

  When bathroom heating is performed, it is not preferable that the bathroom exhaust fan 123 is operating because the bathroom temperature is unlikely to rise. Therefore, a bathroom ventilation fan interlocking circuit (bathroom ventilation fan interlocking relay) that stops the bathroom ventilation fan 123 in accordance with bathroom heating may be attached as an optional equipment. When such a bathroom ventilation fan interlocking circuit is attached, since the bathroom ventilation fan 123 is stopped when bathroom heating is performed, the reason why the bathroom temperature does not increase is considered to be a bathtub lid. On the other hand, if the bathroom ventilation fan interlocking circuit is not attached, the reason why the bathroom temperature does not rise is considered to be a bathtub lid or a bathroom ventilation fan. Therefore, the content of the warning may be changed depending on the presence or absence of the bathroom ventilation fan interlocking circuit (bathroom ventilation fan interlocking relay). Specific control contents are as follows.

  In step S4014, the controller determines whether or not the bathroom ventilation fan interlocking circuit is attached. If the determination result is positive, the controller proceeds to step S4015, and if the determination result is negative, the controller proceeds to step S4016.

  In step S <b> 4015, the controller transmits a warning “Take off the bathtub lid” by voice / screen display or the like.

  In step S <b> 4016, the controller transmits a warning “Check the bathtub lid / bathroom ventilation fan” by voice / screen display or the like.

  In step S402, the controller closes the air flow control valve 142.

  In step S403, the controller turns off the heating flag.

  Thus, you may change the content of a warning by the presence or absence of a bathroom ventilation fan interlocking circuit.

(Fourth embodiment)
FIG. 9 is an overall schematic diagram showing a fourth embodiment of a bathroom heating device according to the present invention.

  In the present embodiment, an air pump 145 is provided in the air conduit 140 downstream of the air flow control valve 142.

  In the first embodiment and the like, the air in the bathroom 12 is sucked by a structure in which a part of the passage 1221 of the circulation fitting 122 is squeezed and the air passage 1223 is connected to the throttled portion a. If it does in this way, as above-mentioned, air can be mixed in hot water with a simple structure, and the effect that manufacturing cost can be held down is acquired. However, in this case, the amount of air mixed into the hot water increases as the opening degree of the air flow control valve 142 increases, and increases as the amount of hot water flowing through the hot water passage 1221 increases. It depends on the opening degree of 142 and the flow rate of hot water flowing through the hot water passage 1221.

  On the other hand, according to the embodiment shown in FIG. 9, by using the air pump 145, the amount of mixed air can be controlled without depending on the circulation amount of hot water and the bubble diameter can be adjusted. it can

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

  For example, the water heater 11, the air flow control valve 142, the intake air flow meter 143, and the like can be changed as appropriate.

  Further, a shutter that is manually opened and closed may be attached to the air intake port 141.

  Moreover, you may provide the air intake port 141 in the bathtub edge of a bathtub instead of providing in the wall surface 12a.

  Moreover, the hot water heater which can heat the hot water supplied to a bathtub may be a bath water heater, a hot water heater, or a memorial machine.

  Moreover, the said embodiment can be combined suitably.

1 Bathroom Heater 11 Water Heater 113 Thermistor (Water Temperature Detector)
12 Bathroom 121 Bath 122 Circulation fitting (Air mixing mechanism)
1221 Hot water passage (passage)
a Passage restriction (aeration mechanism)
1223 Air passage (air mixing mechanism)
123 Bathroom exhaust fan 140 Air pipe (Air mixing mechanism)
1411 Thermistor (Bathroom temperature detector)
142 Air flow control valve (Air mixing mechanism)
145 Air pump (aeration mechanism)
S101 Heating instruction determination unit (heating instruction determination step)
S207, S209 Hot water temperature control unit (hot water temperature control process)
Rebirth control unit (rebirth control process)
S302 Hot water temperature determination unit (hot water temperature determination process)
S304, S305 Air mixing control unit (air mixing control process)
S400 Warning section (warning process)

Claims (17)

A bathtub installed in the bathroom;
A water heater capable of heating hot water supplied to the bathtub;
An air mixing mechanism capable of mixing the bathroom air with hot water supplied from the water heater;
A bathroom temperature detector capable of detecting the temperature of the bathroom;
A heating instruction determination unit that determines whether or not there is an instruction to perform bathroom heating;
When there is an instruction to perform bathroom heating, if the temperature of the bathroom does not reach an appropriate temperature, the air mixing mechanism mixes the air in the bathroom with hot water supplied to the bathtub, and An air mixing control unit for stopping air mixing by the air mixing mechanism when the temperature reaches an appropriate temperature;
Having a bathroom heating device. In the bathroom heating device according to claim 1,
A hot water temperature detector capable of detecting the hot water temperature of the bathtub;
When there is an instruction to carry out bathroom heating, a hot water temperature determination unit that determines whether the hot water temperature of the bathtub has reached the bathroom heating permission temperature,
When the hot water temperature of the bathtub does not reach the bathroom heating permission temperature, the hot water temperature control unit that operates the water heater to raise the hot water temperature without executing the air mixing control unit, and
Further comprising
The aeration control unit is executed when the hot water temperature of the bathtub has reached the bathroom heating permission temperature,
Bathroom heating device. In the bathroom heating device according to claim 1 or 2,
The aeration mechanism is
A passage restrictor for reducing the diameter of a portion of the passage through which hot water supplied from the water heater flows;
An air passage communicating the passage restrictor and the bathroom;
Having a bathroom heating device. The bathroom heating device according to claim 3,
The air mixing mechanism further includes an air flow rate control valve provided in the air passage,
The air mixing control unit controls the air flow rate control valve to adjust the bubble diameter of air mixed into the hot water.
Bathroom heating device. The bathroom heating device according to claim 4,
The air mixing control unit reduces the opening of the air flow control valve when reducing the bubble diameter of the air, and increases the opening of the air flow control valve when increasing the bubble diameter of the air.
Bathroom heating device. In the bathroom heating device according to claim 1 or 2,
The aeration mechanism is
An air passage communicating the passage through which hot water supplied from the water heater flows and the bathroom;
An air pump provided in the air passage;
Having a bathroom heating device. The bathroom heating device according to claim 6,
The air mixing mechanism controls the air pump to adjust the bubble diameter of air mixed into the hot water.
Bathroom heating device. In the bathroom heating device according to any one of claims 4 to 7,
The air mixing control unit controls the bubble diameter of the air mixed into the hot water to be a bubble diameter set in advance so as to be suitable for warming the bathroom.
Bathroom heating device. In the bathroom heating device according to any one of claims 1 to 8,
Having a warning unit for sending a warning when the degree of change in bathroom temperature is smaller than the standard degree when the bathroom air is mixed into the hot water supplied to the bathtub,
Bathroom heating device. The bathroom heating device according to claim 9,
The reference degree is set according to the latest degree of change that did not issue a warning,
Bathroom heating device. In the bathroom heating device according to claim 9 or 10,
The reference degree is set according to the outside air temperature,
Bathroom heating device. In the bathroom heating device according to any one of claims 9 to 11,
If the flow rate of the air flowing through the air passage is smaller than a reference flow rate, the warning unit transmits that the bathtub lid is removed,
Bathroom heating device. The bathroom heating device according to any one of claims 9 to 12,
The warning unit, when the flow rate of the air flowing through the air passage is larger than a reference flow rate, transmits that the bathroom fan is stopped.
Bathroom heating device. In the bathroom heating device according to any one of claims 9 to 13,
The warning unit confirms the presence or absence of a ventilation fan interlocking circuit that controls the operation of the bathroom ventilation fan in conjunction with an instruction to carry out bathroom heating. ,
Bathroom heating device. The bathroom heating device according to any one of claims 9 to 14,
The warning unit confirms the presence or absence of a ventilation fan interlocking circuit that controls the operation of the bathroom ventilation fan in conjunction with an instruction to carry out bathroom heating. To make sure to send out the
Bathroom heating device. In the bathroom heating device according to any one of claims 1 to 15,
If the temperature of the hot water falls when the air in the bathroom is mixed in the hot water supplied to the bathtub, it has a reheating control unit that replenishes the hot water.
Bathroom heating device. A bathtub installed in the bathroom;
A water heater capable of heating hot water supplied to the bathtub;
An air mixing mechanism capable of mixing the bathroom air with hot water supplied from the water heater;
A bathroom temperature detector capable of detecting the temperature of the bathroom;
A method for controlling a bathroom heating device comprising:
A heating instruction determination step of determining whether or not there is an instruction to perform bathroom heating;
When there is an instruction to perform bathroom heating, if the temperature of the bathroom does not reach an appropriate temperature, the air mixing mechanism mixes the air in the bathroom with hot water supplied to the bathtub, and An air mixing control step for stopping air mixing by the air mixing mechanism when the temperature reaches an appropriate temperature;
A control method for a bathroom heating device.

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