JP2014214982A - Bathroom heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathroom heating device capable of sufficiently performing avoidance of heat shock generation by properly performing operation control of a bathroom heater.SOLUTION: A temperature sensor for detecting an atmospheric temperature in a bathroom is provided at a bathroom remote controller 5 in an upper side vicinity position of a bathtub 4. Operation control of a bathroom heater 6 is executed with an intermediate temperature between the atmospheric temperature in the bathroom before bathroom heating and a bath water temperature in the bathtub being a target atmospheric temperature. In summer and the like, as bathroom heating is not necessary, the bathroom heating is executed when temperature difference between the atmospheric temperature in the bathroom and the bath water temperature is equal to or higher than a fixed value. Before execution of the bathroom heating, inquiry is made to a user whether or not to execute the heating, and the heating is executed at the time of output of an operation signal of permission. The target atmospheric temperature can be set based on a sensible temperature of skin surface calculated by the atmospheric temperature in the bathroom and the bath water temperature.

Description

  The present invention relates to a bathroom heating apparatus, and more particularly to a bathroom heating apparatus that can avoid the risk of heat shock.

  Conventionally, in Patent Document 1, it is proposed to notify the user in advance that there is a risk of heat shock based on temperature detection. That is, it was determined that there is a risk of heat shock in the comparison between the temperature detection value by the temperature sensor provided in the kitchen remote control outside the bathroom and the temperature detection value by the temperature sensor provided in the bathroom remote control in the bathroom. Sometimes, it is disclosed to notify that effect. Patent Document 2 discloses that the inside of a bathroom is warmed by discharging hot water from a bath apparatus to a washing place before bathing. Furthermore, patent document 3 has proposed the bathing action assistance apparatus which a bather himself can carry in a bathtub and can take a bath. That is, it is disclosed that the bathing behavior support device detects hot water temperature and the like, and instructs the bather to take a bathing behavior based on the detection information by voice or light emission.

JP2011-247551A JP 2003-106548 A Japanese Patent No. 4070371

  However, even if the user is informed of the possibility of heat shock occurring, the user will be forced to take measures to avoid the occurrence of heat shock, and the bathroom will be warmed by discharging hot water into the washing area. However, the standard of how much warming should be performed is unclear, and the discharged hot water is drained as it is, which may lead to a lack of accuracy and a situation that is contrary to energy saving. Furthermore, even if an instruction for bathing behavior can be received, it does not lead to an improvement in user comfort.

  On the other hand, it is also conceivable to avoid the risk of heat shock by heating the bathroom using a bathroom heater that heats or dries the bathroom with warm air. In this case, although the operation control is performed based on the detection value of the temperature sensor provided in the housing or inside of the bathroom heater, however, the bathroom heater (see the bathroom heater 6 in FIG. 1) Since the warm air is blown from the top to the bottom, it is usually installed on the wall near the ceiling of the inner wall of the bathroom, or embedded in the ceiling surface, and the temperature provided in the bathroom heater The sensor detects the room temperature near the ceiling in the bathroom. In this case, hot air tends to accumulate near the ceiling, and the detected value of the temperature sensor provided in the bathroom heater becomes excessive as the temperature in the bathroom. For this reason, even if it is going to perform bathroom heating control based on the detected value of the temperature sensor of a bathroom heater, the inside of a bathroom cannot be controlled to the suitable temperature for avoiding heat shock generation.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a bathroom heating apparatus that can sufficiently avoid the occurrence of heat shock by appropriately controlling the operation of the bathroom heater. It is to provide.

  In order to achieve the above object, in the present invention, a bathroom remote controller installed in the bathroom, a bathroom heater for raising the ambient temperature in the bathroom, and a bathroom heating control means for controlling the operation of the bathroom heater The following specific items were provided for bathroom heaters equipped with: That is, it comprises a temperature sensor installed to detect the ambient temperature in the bathroom relative to the bathroom remote controller, and the bathroom heating control means controls the operation of the bathroom heater based on the temperature detected by the temperature sensor. (Claim 1).

  In the case of this invention, the bathroom remote controller is installed at a position where the bather taking a bath in the bathtub can operate if the arm is extended, for example, a position near the upper side of the bathtub. The detected temperature accurately represents the ambient temperature received by the bather in the bathroom. For this reason, compared with the case where the ambient temperature near the ceiling in the bathroom is detected and used for bathroom heating control, bathroom heating control for avoiding the occurrence of heat shock can be more accurately realized. It is possible to sufficiently avoid the occurrence of shock.

  In the bathroom heating device of the present invention, the bathroom heating control means is configured to control the operation of the bathroom heater when the temperature difference between the temperature detected by the temperature sensor and the temperature of the bath water is larger than the allowable temperature difference. (Claim 2). By doing so, it is possible to save energy by omitting the execution of bathroom heating when it is not necessary to consider the occurrence of heat shock as in summer.

  Moreover, in the bathroom heating apparatus of the present invention, as the bathroom heating control means, the temperature inside the bathroom detected by the ambient temperature of another indoor space (for example, a dressing room) connecting the bathroom and the open / close door or the temperature sensor before heating the bathroom. An intermediate value between the ambient temperature and the bath water temperature is set as a target ambient temperature, and the bathroom heater is operated and controlled so that the temperature detected by the temperature sensor is raised to the target ambient temperature. (Claim 3). By doing in this way, it is possible to increase the temperature step by step along the movement path of the bather from the dressing room to the bathroom and from the bathroom to the bathtub, thereby sufficiently preventing the occurrence of heat shock. It will be possible.

  Furthermore, in the bathroom heating device of the present invention, the bathroom heating control means can be configured to control the operation of the bathroom heater based on the temperature sensed by the bather calculated using the temperature detected by the temperature sensor ( Claim 4). The amount of heat released from the human skin surface varies greatly depending on whether the environment outside the body is air or water. Therefore, even if the temperature is the same, the sensible temperature will vary greatly. For this reason, rather than simply controlling the heating of the bathroom by simply comparing the temperature of the bath water and the temperature of the atmosphere in the bathroom, the bather who is in the air environment in the bathroom and bathed in the bath water in the bathtub It is more reasonable to perform bathroom heating control based on the contrast of the perceived temperature of the bathroom, and it is possible to more accurately and more appropriately avoid the occurrence of heat shock. Can be.

  As the bathroom heating control means in this case, the temperature sensed by the bather calculated using the ambient temperature of another indoor space (for example, a dressing room) connected with the bathroom and the open / close door separated or detected by the temperature sensor before the bathroom heating. An intermediate value between the bather's perceived temperature calculated using the ambient temperature in the bathroom and the bather's perceived temperature calculated using the bath water temperature is set as the target perceived temperature, and this target perceived temperature is used. Then, the ambient temperature calculated backward is set as the target ambient temperature, and the operation of the bathroom heater can be controlled so that the temperature detected by the temperature sensor is raised to the target ambient temperature. By doing so, the temperature of the bather can be changed stepwise along the path of movement of the bather from the dressing room to the bathroom and from the bathroom to the bathtub. It is possible to sufficiently avoid the occurrence.

  Also, in the bathroom heating device of the present invention, as a bathroom heating control means, before starting the heating in the bathroom by controlling the operation of the bathroom heater, the user is inquired whether or not to execute the heating in the bathroom, If there is an output of a start confirmation operation signal from the user, the heating can be performed (Claim 6). In this way, when the user himself / herself is taking measures to avoid the occurrence of heat shock, it becomes possible to cancel the execution of bathroom heating with an emphasis on energy conservation, and in line with the user's intention. In addition, energy saving can be achieved.

  As described above, according to the bathroom heating device of the present invention, the bathroom remote controller is installed at a position where a bather bathing in the bathtub can operate if the arm is extended, for example, at a position near the upper side of the bathtub. Therefore, the ambient temperature received by the bather in the bathroom can be accurately represented by the detected temperature of the temperature sensor installed in the bathroom remote controller. For this reason, compared with the case where the ambient temperature near the ceiling in the bathroom is detected and used for bathroom heating control, the bathroom heating control for avoiding the occurrence of heat shock can be more accurately realized. Occurrence avoidance can be sufficiently achieved.

  According to the bathroom heating device of claim 2, the bathroom heater is operated as a bathroom heating control means when the temperature difference between the temperature detected by the temperature sensor and the temperature of the bath water is larger than the allowable temperature difference. By controlling and heating the interior of the bathroom, it is possible to save energy by omitting the execution of bathroom heating when it is not necessary to consider the occurrence of heat shock as in summer.

  According to the bathroom heating device of claim 3, as the bathroom heating control means, the atmospheric temperature of the other indoor space connected with the bathroom and the door open or closed, or the atmospheric temperature in the bathroom detected by the temperature sensor before the bathroom heating, By setting the intermediate value of the bath water temperature to the target ambient temperature and controlling the operation of the bathroom heater so that the temperature detected by the temperature sensor is raised to the target ambient temperature, The temperature can be raised stepwise along the bathroom and the movement path of the bather from the bathroom to the bathtub, thereby sufficiently avoiding the occurrence of heat shock.

  According to the bathroom heating device of claim 4, as the bathroom heating control means, the operation of the bathroom heater is controlled based on the temperature sensed by the bather calculated using the temperature detected by the temperature sensor. The amount of heat released from the human skin surface varies greatly depending on whether the external environment is air or water, and appropriate heat shock generation is avoided, taking into account the unique characteristics that the sensory temperature will vary greatly even at the same temperature. Will be able to do. That is, rather than simply controlling the heating of the bathroom by simply comparing the temperature of the bath water and the temperature of the atmosphere in the bathroom, the bather who is in the air environment in the bathroom or bathed in the bath water in the bathtub The bathroom heating control for avoiding the occurrence of the heat shock can be performed more appropriately and more appropriately and the bathroom heating control for avoiding the occurrence of the heat shock can be performed more appropriately by performing the bathroom heating control based on the comparison of the sensed temperature.

  According to the bathroom heating apparatus of claim 5, as a bathroom heating control means, a bather's perceived temperature calculated using an ambient temperature of another indoor space that is connected with the bathroom and the open / close door separated, or the temperature sensor before the bathroom heating. An intermediate value between the bather's perceived temperature calculated using the bath's detected ambient temperature and the bather's perceived temperature calculated using the bath water temperature is set as the target perceived temperature. By setting the ambient temperature calculated backward using the temperature as the target ambient temperature and controlling the operation of the bathroom heater so that the temperature detected by the temperature sensor is raised to the target ambient temperature, The bather's perceived temperature can be changed stepwise along the path of the bather's movement from the bathroom into the bathtub, thereby sufficiently avoiding the occurrence of heat shock. It becomes so that.

  According to the bathroom heating device of claim 6, as the bathroom heating control means, before the operation of the bathroom heater is controlled and the heating in the bathroom is started, the user is inquired about whether or not to perform the heating in the bathroom. If there is an output of a start confirmation operation signal from the user, the heating is performed. Thus, when the user himself takes measures for avoiding the occurrence of heat shock, the energy saving is emphasized. This makes it possible to cancel the heating of the bathroom, and in accordance with the user's intention, can also save energy.

It is a perspective view which shows the state between a dressing room and the inside of a bathroom in the state which abbreviate | omitted the front surface and the ceiling. It is a schematic diagram which shows the component of the bathroom heating apparatus of this invention. It is a principle figure which shows in principle the warm air blowing mechanism by a bathroom heater. Fig.4 (a) is a front view of the example of a bathroom remote control, FIG.4 (b) is the partial expanded sectional view explanatory drawing in the AA of Fig.4 (a). It is a flowchart of bathroom heating control which concerns on 1st Embodiment. It is a related figure which shows the relationship between the space temperature of a dressing room, the space temperature in a bathroom, and the bath temperature in a bathtub. It is a flowchart of bathroom heating control which concerns on 2nd Embodiment. FIG. 8A is a heat transfer model diagram between the inside of the body and the air side with the skin of the bather in the air environment as a boundary, and FIG. 8B is the boundary of the skin of the bather in the underwater environment. It is a heat transfer model figure between a body inner side and an underwater side.

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

  FIG. 1 shows a situation in a bathroom to which an embodiment of the present invention is applied. In the bathroom 3 that can be accessed by the dressing room 1 and the door 2, the bathtub 4 is installed on the floor 31, and the bathroom remote controller 5 is installed on the wall 32 slightly above the bathtub 4. A bathroom ventilation dryer 6 is mounted on the wall 33 as a bathroom heater. Hereinafter, the bathroom ventilation dryer / heater 6 is abbreviated as “bathroom heater 6”.

  As shown in FIG. 2, the bathtub 4 and the bathroom heater 6 are connected to a hot water heater 7 installed at a predetermined position outside or inside the bathroom 3 through a pair of circulation pipes 71 and 72, respectively. Has been. In the bathtub 4, hot water filling is performed from the water heater 7 through the circulation pipe 71, and the hot water is circulated and heated for reheating with the water heater 7. Yes. The bathroom heater 6 is circulated and supplied with high-temperature water at a predetermined temperature (for example, 80 ° C.) from the water heater 7 through the circulation pipe 72, and hot air is blown into the bathroom 3 using this high-temperature water as a heat source. The bathroom 3 is heated. As illustrated in FIG. 3, the principle of hot air blowing by the bathroom heater 6 is that the hot water circulated from the hot water heater 7 is operated while the fan 62 is operated while passing through the radiator 61. The hot air can be blown into the bathroom 3 from 63.

  In the example of FIG. 2, the water heater 7 is configured as a composite type having both a hot water supply function, a hot water circulation type hot water heating function, a flow replenishment function, and a pouring function. Briefly explaining each function, for the hot water supply function, tap water or the like is supplied from the outside to the heat exchanger in the hot water heater 7, and the predetermined heat is applied by the combustion heat of the burner while the water passes through the heat exchanger. The hot water is heated up to a preset hot water supply temperature or a preset hot water temperature and discharged. The hot water is supplied to an external hot water tap (not shown), or the hot water is poured into the bathtub 4 through the circulation pipe 71 by opening / closing switching control of the hot water valve. In addition, for the hot water heating function, the low temperature water that has become low temperature due to heat radiation in the bathroom heater 6 is returned to the hot water heater 7 through the circulation pipe 72 and burns in the burner while passing through the heat exchanger in the hot water heater 7. Heat exchange heat is performed by heat to obtain predetermined high-temperature water, and this high-temperature water is circulated and supplied to the bathroom heater 6 again. Furthermore, for the flow replenishment function, for example, a liquid-liquid heat exchanger in which high-temperature water in the hot water heating function is supplied as a heat source is supplied as a heat source. The bath water in 4 is circulated and chased away. Each of these functions is controlled by a water heater controller 73. The water heater controller 73 is connected to the kitchen remote controller 74 and the like, and is connected to the bathroom heating controller 8 constituting the bathroom heating control means so as to be capable of bidirectional communication. The bathroom heating controller 8 receives an output such as an input setting signal from the bathroom remote controller 5 and a temperature detection signal described later, and outputs a signal related to the control information to the water heater controller 73, while controlling the operation of the bathroom heater 6. To do. Such a bathroom heating controller 8 can be provided in a bathroom heating unit attached to the bathroom heater 6, or can be provided in the water heater 7, for example, integrally with the water heater controller 73 of the water heater 7. it can.

  The bathroom remote controller 5 is installed at an upper position by a slight distance U (for example, about U = 10 to 20 cm) from the upper end edge of the bathtub 4 so that the bathroom remote controller 5 can be operated in the state of bathing in the bathtub 4. As illustrated in FIG. 4A, the bathroom remote controller 5 includes a display unit 51 formed by an LCD, and various switches such as a bath automatic switch 52 and a voice call unit 53. . The bathroom remote controller 5 is provided with a bathroom temperature sensor 54 as shown in FIG. This bathroom temperature sensor 54 is located at a position where the bathroom remote controller 5 is installed in the bathroom 3, that is, slightly above the bathtub 4, and at a height position around the thigh of the bather when the bather stands up. The temperature in the bathroom 3 is detected and output to the bathroom heating controller 8. As the bathroom temperature sensor 54, for example, the bathroom temperature sensor 54 can be disposed in the bathroom 3 through an opening 56 formed through the opening / closing lid 55 in the opening / closing lid 55 on the lower side of the bathroom remote controller 5.

<First Embodiment>
Next, bathroom heating control according to the first embodiment by the bathroom heating controller 8 will be described with reference to the flowchart of FIG. In the bathroom heating control, for example, the bath automatic switch 52 (see FIG. 4) of the bathroom remote controller 5 is turned ON by the user and the bath 3 is filled with water, or a predetermined bath is set by chasing after the hot water filling. When the reheating to the temperature is completed (YES in step S1), first, it is determined whether or not the temperature difference Ts between the bath temperature Ty and the bathroom temperature Tr is greater than or equal to a predetermined set tolerance Tt (step). S2). The bath temperature Ty is the bath temperature of the bath water in the bath 3, and a bath set temperature set in advance or a bath set temperature input and set by the user to the bathroom remote controller 5 can be used. As the bathroom temperature Tr, an atmospheric temperature (air temperature) in the bathroom 3 by a temperature sensor 54 provided in the bathroom remote controller 5 is used. For example, if the bath temperature Ty is 40 ° C. and the bath temperature Tr is 15 ° C., the temperature difference Ts is 25 ° C., which is larger than the set tolerance Tt (for example, 25 ° C.). Thus, the bathroom heating control is executed. In such a case, for example, in winter, the temperature Tr in the bathroom before bathing is considered to be often lower than 15 ° C., and the temperature difference Ts is larger than the set tolerance Tt, and the bathroom heating control is executed. It has come to be. Even in the spring or autumn season, the bathroom heating control is executed on the day when the temperature is low with the same temperature difference as in the winter season.

  If the temperature difference Ts is larger than the set temperature difference Tt (YES in step S2), a check is made as to whether or not the apparatus equipped with this bathroom heating control has a bathroom heating function (step S3). The user confirms whether or not the bathroom heating may be executed (step S4). The check in step S3 is to make it possible to apply the bathroom heating controller 8 of the same specification to a model that does not have a bathroom heating function, and the intention confirmation in step S4 is a measure for avoiding the occurrence of heat shock. Considering what may be done by oneself, in such a case, it is made to comply with the user's intention to cancel execution of bathroom heating with emphasis on energy saving. If it is a model that does not have a bathroom heating function in the check in step S3, a message for alerting the display such as “Please note that the bathroom is cold” on the display of 74 such as the kitchen remote control. Is displayed and / or voice-guided (step S5). In addition, for confirmation of the intention in step S4, for example, “The bathroom is cold because the bathroom is cold, but the bathroom heating starts. Are you sure? Please turn on the button "message and / or voice guidance. If the start button ON operation signal is not output within a predetermined time (NO in step S6), the message display and / or voice guidance in step S5 is executed, while the start button ON operation by the user is performed. If the signal is output (YES in step S6), the operation of the bathroom heater 6 is started and the bathroom heating is executed (step S7).

  That is, hot water is circulated and supplied from the water heater 7 to the bathroom heater 6 to blow out hot air into the bathroom 3. In principle, the operation of the bathroom heater 6 is controlled by raising the temperature in the bathroom 3 until at least the temperature difference Ts becomes smaller than the set tolerance Tt. The temperature detected by the temperature sensor 54 can be raised until the next target ambient temperature is reached. That is, as the target atmosphere temperature, an intermediate value between the bath temperature Ty (the bath set temperature) and the atmosphere temperature of the dressing room 1 or the bathroom temperature Tr before bathroom heating is set, and the detected temperature is the target atmosphere temperature. The temperature can be controlled so that Here, the ambient temperature of the dressing room may be detected by separately installing a temperature sensor in the dressing room, but in the state before the bathroom heating, both the bathroom 3 and the dressing room 1 have the same ambient temperature (Td = Tr, see FIG. 6), therefore, the bathroom interior temperature Tr, which is the temperature detected by the temperature sensor 54 of the bathroom remote controller 5 before the bathroom heating, can be used as the atmosphere temperature of the dressing room. Further, as shown in FIG. 6, target atmosphere temperature = {dressing room temperature Td (= Tr) + in-bath temperature Ty} / 2 is set as the target atmosphere temperature, and the temperature detected by the temperature sensor 54 of the bathroom remote controller 5 is The warm air blowing by the bathroom heater 6 is continued until the temperature reaches the target atmosphere temperature, and if the temperature detected by the temperature sensor 54 reaches the target atmosphere temperature, the bathroom heating control is stopped and the process returns.

  In the case of such bathroom heating control, before the bather enters the bathroom 3 for bathing, the temperature in the bathroom 3 can be raised to a predetermined temperature, and the risk of heat shock can be avoided. At this time, the bath temperature Tr is raised to an intermediate value between the atmosphere temperature Td of the dressing room and the bath temperature Ty, so that the bather must take the environment before bathing in the bath water in the bath 3 after undressing. The temperature rises step by step, and it is possible to effectively avoid the occurrence of heat shock. And by raising the temperature Tr in the bathroom to the average value (median value) between the atmosphere temperature Td of the dressing room and the temperature Ty in the bathtub, the above-mentioned stepwise rise can be made smoother, It is possible to further avoid the occurrence of heat shock. In the above control example, the bathroom temperature Tr before bathroom heating is used as the dressing room temperature Td. However, the temperature is not limited to this. For example, the detection temperature of the temperature sensor for detecting the ambient temperature provided in the water heater 7 is used. Can be substituted. Since the water heater 7 is installed indoors or outdoors outside the bathroom, the detected temperature of the temperature sensor for detecting the ambient temperature is equal to the ambient temperature of the dressing room or, if outdoor, from the ambient temperature of the dressing room. This is because it can be used as a temperature value on the safe side. Moreover, the temperature sensor 11 (refer FIG. 1) may be provided in the dressing room 1, and the detected temperature may be used as the dressing room temperature Td.

Second Embodiment
The second embodiment pays attention to the fact that the environmental temperature felt by the bather after undressing is more dependent on the perceived temperature based on the heat release from the skin surface of the bather, rather than their own temperature such as the atmospheric temperature or hot water temperature. The present invention provides bathroom heating control for avoiding more appropriate heat shock. For example, the human body temperature in an air environment of 33 ° C. feels hot, while the human body temperature in the same 33 ° C. water (in bath water) environment feels cold. This is because the amount of heat radiated from the human skin surface varies greatly depending on whether the environment outside the body is air or water, so that the perceived temperature varies greatly even at the same temperature. Therefore, rather than simply controlling the bathroom heating by simply comparing the temperature of the bath water and the temperature of the atmosphere in the bathroom itself as in the first embodiment, the bath water in the bath environment and the bath water in the bathtub. It is possible to more accurately achieve the avoidance of heat shock by performing bathroom heating control by comparing the bather's sensed temperature when immersed.

  That is, as shown in the flowchart of FIG. 7, first, the bather's standard body temperature (standard body temperature) and the temperature detected by the temperature sensor 54 of the bathroom remote controller 5 before bathroom heating (bathroom temperature Tr; atmosphere in the bathroom 3) Temperature) and bath setting temperature (bath temperature Ty; bath water temperature in bathtub 4), bather's perceived temperature (skin surface temperature) Tk when in the air environment in bathroom 3, and bath 4 is calculated by solving the equation (1) described later (step S21), and based on these skin surface temperatures Tk. The heat release amounts Hr and Hy from the skin surface in this case are calculated using the formula (2) described later (step S22). Next, the heat release amount Hr from the bather's skin surface when in the air environment in the bathroom 3 and the heat release amount Hy from the bather's skin surface when immersed in the bath water in the bathtub 4 are used. A target heat dissipation amount is set (for example, an intermediate value between the two types of heat dissipation amounts Hr and Hy is set as the target heat dissipation amount Hm), and a target skin surface temperature Tkm that is the set target heat dissipation amount Hm is set to (2 ) Using the formula (1), the backside calculation is performed (step S23), and the target atmosphere temperature in the bathroom 3 that is the calculated target skin surface temperature Tkm is calculated by using the formula (1) (step S24). ). And operation control of the bathroom heater 6 is performed so that it may become the target atmospheric temperature obtained by the above (step S25). Details will be described below.

  For example, as shown in FIG. 8, the bather is in contact with his / her body and the extracorporeal environment with the skin surface as a boundary. When the extracorporeal environment is the air environment in the bathroom 3, the skin surface is in contact with the air, and when the extracorporeal environment is the bath water (water) in the bathtub 4, the skin surface is the boundary. Is in contact with water (bath). When the skin surface is in contact with the air, there is a skin film (usually film thickness L1 = 4 mm) on the body side across the skin surface, and an air film (usually a boundary film) on the air side. Membrane L2 = 3 mm) (see FIG. 8A). On the other hand, when the skin surface is in contact with water as a boundary, the skin boundary film (usually the film thickness L1 = 4 mm) exists on the body side across the skin surface, and the water boundary film (usually normal) Is present (see FIG. 8 (b)). When the extracorporeal environment is air, the heat inside the body conducts heat with the outside air through the skin film and the air film, and when the extracorporeal environment is water (bath water) Conducts heat with external water (bath water) through the skin film and the water film.

In the situation as described above, the calculation of the skin surface temperature Tk in step S21 is obtained as follows. That is, the skin surface temperature Tk is determined based on the thermal conductivity λ1, λ2, λ3 (unit: W / m · K) of the skin boundary film, the air boundary film, or the water boundary film, and their film thicknesses L1, L2, L3. The amount of heat released from the body on the skin surface (or the amount of heat absorbed into the body; unit W / m ² ) and the amount of heat absorbed from the outside environment on the skin surface (or the amount of heat released from the outside environment) By solving the following relational expression that is equal to each other, the skin surface temperature Tk under a specific condition can be obtained. For example, the relational expression when in the air environment in the bathroom 3 is the expression (1).
−λ2 × (external environment temperature−Tk) / L2 = −λ1 × (Tk−internal temperature) / L1
(1)
Here, λ2: thermal conductivity of air (λ2 = 0.0263), L2: film thickness of air boundary film (L2 = 3 mm), λ1: thermal conductivity of skin (λ1 = 0.21), L1: skin The film thickness of the film (L1 = 4 mm), Tk: skin surface temperature. In the unit of thermal conductivity: W / m · K or W in the unit of heat dissipation W / m ² , W is watt, m is meter, K is Kelvin (converted in degrees Celsius +273.15), and in the calculation, Extracorporeal environment temperature, internal temperature, and Tk are converted from Celsius to Kelvin.
When the equation is transformed and arranged for Tk, the following equation (3) is obtained.
Tk = (external environmental temperature × α + internal temperature) / (1 + α) (3)
Here, α is a coefficient represented by the following equation (4), and is referred to as a film condition coefficient.
α = (λ2 × L1) / (λ1 × L2) (4)
For example, when λ2 = 0.0263, L2 = 3 mm, λ1 = 0.21, L1 = 4 mm, and calculating the membrane condition factor α, α = 0.167 is obtained, and the extracorporeal environment temperature is, for example, 28 ° C. For example, if 36 ° C. is substituted into the equation (3) as the body temperature, Tk = 34.86 ° C. is obtained as the skin temperature Tk of the bather in the air environment in the bathroom 3.

On the other hand, the relational expression in the case of the air environment in the bathroom 3 is the expression (1) ′.
λ3 × (external environment temperature−Tk) / L3 = λ1 × (Tk−internal temperature) / L1 (1) ′
Here, λ3: thermal conductivity of water (λ3 = 0.6), L3: film thickness of the water boundary film (L3 = 0.4 mm), and the above equation (4) is the following equation (4) ′ It is represented by
α = (λ3 × L1) / (λ1 × L3) (4) ′
Similar to the above, substituting the values of λ3, L1, λ1, and L3 to calculate the membrane condition factor α yields α = 28.571, which is, for example, 33 ° C. as the external temperature, For example, by substituting 36 ° C. into the equation (3), Tk = 33.1 ° C. is obtained as the skin surface temperature Tk when the extracorporeal environment is underwater.

Next, as step S22, the heat radiation amounts Hr, Hy are calculated by the equation (2) based on the obtained skin temperature Tk.
Hr, Hy = −λ1 × (Tk−internal temperature) / L1 (2)
As a calculation example, when Tk is 34.86, Hr = 59.85, and when Tk is 33.1, Hy = 152.25. Generally, the value of the amount of heat radiation (experience temperature) that is neither hot nor cold is said to be 58.2 W / m ² , so the heat radiation amount in an air environment of 28 ° C. in the above example (59.85 W / m ² ). Then, although it is neither hot nor cold, the heat dissipation amount (152.25 W / m ² ) becomes excessive in an underwater environment of 33 ° C., and it feels cold.

  Furthermore, in steps S23 and S24, as the target heat dissipation amount Hm, the average value of the heat dissipation amount Hr in the air environment in the bathroom and the heat dissipation amount Hy in the bath water condition (Hm = (Hr + Hy) / 2). ) And the temperature of the external environment (air environment in the bathroom 3) that can realize the target heat dissipation amount Hm is obtained by back calculation. In the reverse calculation, first, the target skin surface temperature Tkm that becomes the target heat radiation amount Hm is calculated backward using the equation (2) (step S23), and then the target in the bathroom 3 that becomes the calculated target skin surface temperature Tkm. The ambient temperature Trm is calculated backward using the equation (1).

  In step S25, the operation of the bathroom heater 6 is started, and the operation of the bathroom heater 6 is controlled so that the target ambient temperature Trm is obtained. That is, the hot air blowing from the bathroom heater 6 is continued until the temperature detected by the temperature sensor 54 of the bathroom remote controller 5 reaches the target ambient temperature Trm. The target heat dissipation amount Hm may be set to an average value as described above, but the intermediate value between the heat dissipation amount Hr when in a bathroom air environment and the heat dissipation amount Hy when immersed in bath water is set. It can also be adopted. Further, as in steps S4 and S6 of the first embodiment, it may be confirmed to the user as to whether or not to perform bathroom heating by the bathroom heater 6 in step S25.

  In the second embodiment described above, the calculation is performed using the atmosphere temperature in the bathroom and the bath temperature, but the atmosphere temperature in the dressing room and the bath temperature are set as in the first embodiment. May be used to perform the calculation. In this case, the atmospheric temperature in the dressing room can be substituted by the temperature detected by the temperature sensor 54 of the bathroom remote controller 5 or the temperature detected by the atmospheric temperature sensor of the water heater 7 as described in the first embodiment. .

<Other embodiments>
The present invention is not limited to the first and second embodiments described above, but includes other various embodiments. That is, in the said 1st and 2nd embodiment, although what hot air was blown out using the hot water circulatingly supplied from the hot water heater 7 as a heat source was shown as a bathroom heater, it is not restricted to this, What is the hot water heater 7? Regardless, it may be configured using an electric heater or the like.

1 Dressing room (other indoor space connecting the bathroom and the door)
2 Open / close door 3 Bathroom 4 Bathtub 5 Bathroom remote control 6 Bathroom ventilation dryer / heater (bathroom heater)
8 Bathroom heating controller (bathroom heating control means)
54 Temperature sensor

Claims (6)

In a bathroom heating device comprising a bathroom remote controller installed in a bathroom, a bathroom heater for raising the ambient temperature in the bathroom, and a bathroom heating control means for controlling the operation of the bathroom heater,
A temperature sensor installed for detecting the ambient temperature in the bathroom with respect to the bathroom remote controller is provided, and the bathroom heating control means is configured to control the operation of the bathroom heater based on the temperature detected by the temperature sensor. Being
A bathroom heating device characterized by that. The bathroom heating device according to claim 1,
The bathroom heating control means is configured to control the operation of the bathroom heater when the temperature difference between the temperature detected by the temperature sensor and the temperature of the bath water is larger than an allowable temperature difference. Bathroom heating device. The bathroom heating device according to claim 1 or 2,
The bathroom heating control means calculates an intermediate value between the temperature of the bath water and the ambient temperature of the other indoor space connected with the bathroom and the door open or closed, or the ambient temperature of the bathroom detected by the temperature sensor before the bathroom heating. A bathroom heating apparatus configured to control the operation of the bathroom heater so that the temperature is set to a target ambient temperature and the temperature detected by the temperature sensor is increased to the target ambient temperature. The bathroom heating device according to claim 1,
The bathroom heating control device is configured to control the operation of the bathroom heater based on a temperature sensed by a bather calculated using a temperature detected by the temperature sensor. The bathroom heating device according to claim 4,
The bathroom heating control means calculates the bather's perceived temperature calculated using the ambient temperature of another indoor space that is separated from the bathroom and the open / close door, or the ambient temperature detected by the temperature sensor before heating the bathroom. The intermediate temperature between the bather's perceived temperature calculated using the bath temperature and the bather's perceived temperature calculated using the bath water temperature is set as the target perceived temperature, and the ambient temperature calculated backward using this target perceived temperature is the target. A bathroom heating apparatus configured to control the operation of the bathroom heater so that the temperature detected by the temperature sensor is raised to the target ambient temperature. The bathroom heating device according to claim 1,
The bathroom heating control means inquires of the user about whether or not to perform heating in the bathroom before controlling the operation of the bathroom heater to start heating in the bathroom, and an operation signal for confirming start from the user. The bathroom heating device is configured to perform the heating when there is an output of.

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