JP2020033860A - Bathtub constant temperature drainer and method of adjusting bath level and hot water temperature using the same - Google Patents

Abstract

To provide a drainer capable of suppressing waste of thermal energy contained in drainage without impairing the scenery, making the temperature of the bathtub to which hot water flows uniform, and keeping the water level constant.SOLUTION: There is provided a drainer in which an internal space inside a columnar member, which is hollow inside, in which the top and bottom are closed is divided into two chambers by a vertical partition plate 116 in the axial direction so as to have a space between the top and the bottom, a low-temperature water outlet being arranged in one chamber, a low-temperature water inlet being installed in the other chamber. During construction, an overflow surface 233 at the upper end of the vertical partition plate is adjusted to the expected water level in the bathtub, and a drain port provided on the bottom of the bathtub and the low temperature water inlet of the present invention are piped, and the low temperature water outlet is connected to a drain pipe.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drainage device for a sink tub.

  Conventionally, a flush tub that replenishes hot water from the upper part of the bath tub using a sprue and drains without filtration is conventionally drained by overflow from the upper part of the bath tub as shown in FIG. In this method, relatively high-temperature hot water supplied from the upper part of the bathtub is not sufficiently mixed with the bathtub water and is discharged at a high temperature, so that the bathtub water is not sufficiently kept warm and the waste heat energy contained in the wastewater is wasted. Has also become.

  In order to solve the above-mentioned problem, there is a method of draining water from the bottom of a bathtub and setting up a drainage pipe in a torii shape for water level adjustment. In FIG. 23, the lower surface of the horizontal drawing pipe portion of the torii pipe is at the same water level as the water level of the bathtub, and the drainage at the same water level as the bathtub is provided in the piping on the bathtub side from the horizontal drawing pipe portion of the torii pipe. Is flowing. At this time, when the water level in the bathtub rises, the drainage is drained over the horizontal pipe portion of the torii pipe, which is the overflow surface. In this method, water can be drained from the lower part of the bathtub at a relatively low temperature, and the water level can be adjusted with a simple structure that does not use a sensor.However, if the pipe from the bathtub to the torii pipe is lengthened, accumulated water increases and sanitation increases. Because it is a problem, it is necessary to shorten the time it takes for the water flowing out of the drain port to be installed near the bathtub and drained beyond the horizontal piping section of the torii pipe, so that the exposed pipe is located near the bathtub. It will appear and spoil the scenery of the bathhouse.

  Therefore, an object of the present invention is to provide a drainer that can make the hot water temperature of a hanging bath tub uniform without deteriorating the landscape and keep the water level constant.

  In order to solve the above problems, a drainer according to the present invention includes a partition plate that divides an internal space into two chambers in an axial direction inside a columnar member having a hollow interior and a closed upper and lower bottom. A space is provided between them, and they are vertically adhered to the lower bottom, arranged so as to adhere to a certain side surface and the opposite surface, and a hot water inlet is provided in one of the chambers separated by the partition plate. The low-temperature water outlet is provided on the other side. The low-temperature water outlet and the low-temperature water inlet are disposed on the bottom surface or the side surface of the present invention. At the time of construction, the upper end of the partition plate is adjusted to the expected water level of the bathtub, the drain provided on the bottom of the bathtub and the low temperature water inlet of the present invention are connected by a communication pipe, and the low temperature water outlet is connected to the drain pipe. The cross-sectional shape of the column member for performing this function may be any shape such as a circle including an ellipse or a polygon.

  The upper end of the partition plate plays the same role as the lower surface of the horizontal drawing pipe part when draining using torii pipe. That is, drainage at the same level as the bathtub flows into the drainage water level adjustment chamber having the low-temperature water inlet of the present invention, and when the water level in the bathtub rises, the drainage overflows the upper end of the partition plate, which is an overflowing edge. Then, it flows into the drainage outflow chamber having the low-temperature water outlet according to the present invention, and is drained.

  Instead of providing the partition plate described in paragraphs 0005 to 0006, the inside can be partitioned by providing a pipe vertically inside either the low-temperature water outlet or the low-temperature water inlet. In this case, the pipe wall functions as a partition described in paragraph 0005.

  Since the appearance of the present invention is a pillar, the function can be performed without impairing the view of the bathroom if the paint is applied according to the view. The coating may be a mixture of colors, gradation, metallic, glitter, pearl, marble, camouflage, artificial wood, artificial stone, etc., in addition to the single color.

  In the practice of the present invention, it is necessary to set the height of the overflow edge in accordance with the water level of the bathtub. For this reason, in the case of using a partition plate, if a height adjusting mechanism is provided in the present invention, construction on site becomes easy. The height adjustment mechanism is realized by providing a means for stacking two cylinders having similar shapes in cross section, adjusting the height to a suitable height, and holding the adjusted height. If the height adjusting mechanism is provided below an extended portion of the side surface of the present invention, that is, below the low-temperature water inlet, the low-temperature water outlet and the main body bottom, the height can be adjusted without impairing the function. In the case of using a vertical pipe, it is possible to determine the water level by making the vertical pipe long and cutting it on site according to the water level.

  If a sensor such as a water level sensor cannot be attached to the bathtub because a mounting hole cannot be formed in the bathtub due to the influence of the material or the like and it is not desired to provide a design, the present invention can be attached. In this case, it is installed in the room having the low-temperature water inlet of the present invention. The water level sensor may be an electrode rod type or a pressure sensing type. In addition, the use of a temperature sensor or a water quality monitoring sensor is also conceivable.However, since water with a low flow rate is measured not immediately after being discharged from the bathtub, for example, when measuring circulating water with a relatively high flow rate in a machine room. Rather than measuring the quality of bathtub water, accuracy tends to be lower. For this reason, it is necessary to provide a sensor at a position where the water immediately after flowing into the present invention can be measured, that is, near the low-temperature water inflow port, so that the water quality in the bathtub can be measured.

  By implementing the present invention, it is possible to provide a drainer that can make the hot water temperature of the hanging bath tub uniform without impairing the landscape and keep the water level constant. In addition, in the method of water replacement by overflow from the bathtub, since the hot water is drained from the bottom of the bathtub where the water tends to stay, there is also an effect of improving sanitation.

  FIG. 1 is a front view of the present invention.   FIG. 2 is a full sectional view of the present invention.   FIG. 3 is a construction example diagram of the present invention.   FIG. 4 is an enlarged view of a portion A showing a state where the water levels are balanced.   FIG. 5 is an enlarged view of a portion A showing an overflow state.   FIG. 6 is a full sectional view showing an embodiment having a height adjusting mechanism.   FIG. 7 is a full sectional view showing an embodiment in which a low-temperature water inlet and a low-temperature water outlet are provided on the bottom surface.   FIG. 8 is a construction example diagram of the embodiment of FIG.   FIG. 9 is a full sectional view of an embodiment having an electrode type water level sensor.   FIG. 10 is a full sectional view of an embodiment having a temperature sensor.   FIG. 11 is a construction example diagram of an embodiment capable of performing an effect in combination with a human sensor.   FIG. 12 is a construction example diagram of the embodiment in which the water level and the temperature of the bathtub are controlled using the present invention having the water level sensor and the temperature sensor.   FIG. 13 is a construction example diagram of an embodiment in which the present invention having a water level sensor and a temperature sensor is combined with a human sensor.   FIG. 14 is a full sectional view of an embodiment in which a vertical pipe is connected to the low-temperature water outlet in place of the vertical partition plate, and has a low-temperature water inlet and a low-temperature water outlet on the side surface.   FIG. 15 is a full cross-sectional view of an embodiment in which a vertical pipe is connected to a low-temperature water outlet in place of the vertical partition plate and has a low-temperature water inlet and a low-temperature water outlet on the bottom surface.   FIG. 16 shows an embodiment in which a vertical pipe is connected to the low-temperature water outlet in place of the vertical partition, and the bottom has a low-temperature water inlet and a low-temperature water outlet on the bottom, and the bottom is raised by using a vertical pipe with an expanded diameter and a horizontal partition. 1 is an entire cross-sectional view of an embodiment of the present invention.   FIG. 17 is a full sectional view of an embodiment in which a vertical pipe is connected to the low-temperature water inlet instead of the vertical partition plate, and has a low-temperature water inlet and a low-temperature water outlet on the side surface.   FIG. 18 is a full cross-sectional view of an embodiment in which a vertical pipe is connected to a low-temperature water inlet instead of a vertical partition plate and has a low-temperature water inlet and a low-temperature water outlet on the bottom surface.   FIG. 19 shows an embodiment in which a vertical pipe is connected to the low-temperature water inlet instead of the vertical partition, and the bottom has a low-temperature water inlet and a low-temperature water outlet on the bottom, and the bottom of the vertical pipe is raised and the bottom is raised using the horizontal partition. 1 is an entire cross-sectional view of an embodiment of the present invention.   FIG. 20 is a full sectional view of an embodiment in which a vertical pipe is connected to the low-temperature water outlet in place of the vertical partition plate, which has a water level sensor and a temperature sensor.   FIG. 21 is a construction example diagram in which a human sensor is combined with the embodiment of FIG.   FIG. 22 shows a conventional hanging bath.   FIG. 23 shows a conventional technique in which a pipe is assembled in a torii shape and drained from the bottom of a bathtub.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a basic structure and a working example of the present invention, and FIGS. 6 to 21 show an applied embodiment.

  1 and 2 show a typical embodiment of the present invention. FIG. 1 is a front view of the present invention, and FIG. 2 is a full sectional view. According to the law of nature, the height of the low-temperature water inlet indicated by reference numeral 112 can function even in the range from the bottom of the main body to the upper end of the vertical partition plate indicated by reference numeral 116. However, in order to prevent the pipe from being surfaced by being provided higher than the floor surface, it is preferable to provide the pipe at the bottom. The upper end of the vertical partition plate is an overflow surface in the present invention, in other words, a height at which drainage starts, and is indicated by a partition plate overflow surface of reference numeral 233.

  In the main body of reference numeral 111, a horizontal partition plate of reference numeral 115 is provided at a position corresponding to the lower end of the low-temperature water outlet of reference numeral 113 and its height. This is the bottom as a core part of the present invention, and corresponds to the lower bottom of the hollow columnar member described in the paragraphs up to paragraph 0010. The lower part of the horizontal partition plate has a shape in which the side surface of the main body is extended and a protruding edge is provided, and this is a fixing portion for fixing to a foundation or the like. Inside the main body, there is a vertical partition plate 116 that separates the internal space. In the partitioned internal space, the side with the low-temperature water inlet of reference numeral 112 is a drainage water level adjustment chamber of reference numeral 231, and the side with the low-temperature water outlet of reference numeral 113 is a drainage outflow chamber of reference number 232. In addition, in order to facilitate maintenance such as cleaning and inspection, a portion corresponding to the upper bottom of the present invention is opened, and a lid 114 is detachably and watertightly attached. Although the connection of the low-temperature water inlet or the low-temperature water outlet is a flange in the drawing, screwing or a socket can be used.

  3 to 5 are views showing a use state of the present invention, FIG. 3 is a construction example view, and FIGS. 4 to 5 are views enlarging a portion A and explaining a mechanism of water level adjustment. FIG. 3 illustrates a bathtub 310 and the present invention in cross-section for illustration. A flow control valve is provided in the piping between the bathtub and the present invention. In FIG. 3, the flow rate control valve is represented by a manual flow rate control valve 341, but the flow rate control valve may be electrically operated. Further, a drain pipe for completely draining the inside of the pipe including the inside of the present invention for cleaning or the like is provided, and a drain valve 331 is provided. The drain valve is normally closed. At the start of use, as shown in FIG. 4, the bathtub water surface of reference numeral 212 and the water surface in the present invention of reference numeral 213 are in the same water level and are in a balanced state. Here, when replenishment of hot water is started from the hot water discharge port denoted by reference numeral 320, the water level of the drainage in the present invention connected by the communication pipe rises by the amount of the replenishing water and exceeds the overflow surface of the partition plate denoted by reference numeral 233. It flows to the drainage outflow chamber denoted by reference numeral 232 and is drained.

  When the present invention is carried out, the water is drained from the bottom instead of the overflow from the top of the bathtub. In such a case, it is possible to make the opening of the flow control valve small, and to overflow the bathtub edge. The opening is adjusted by looking at the ratio of the amount of overflow from the tub edge to the amount of waste water from the present invention. This can also be used to create overflowing bathtubs.

  FIG. 6 shows an embodiment with a height adjusting mechanism. In this drawing, the height adjustment portion of reference numeral 128 has a larger outer diameter than the main body, and the main body is inserted into the height adjustment portion. On the contrary, the height adjustment portion is smaller than the main body. Can be manufactured so as to cover the height adjusting portion. In the present embodiment, the water level can be adjusted if the height is adjusted and maintained so that the overflow surface of the partition plate 233 and the bathtub water level are matched during construction at the installation site.

  7 is a full sectional view showing an embodiment in which a low-temperature water inlet and a low-temperature water outlet are provided on the bottom surface, and FIG. 8 is a construction example of the embodiment in FIG. In this embodiment, there is no horizontal partition plate, and the bottom part and the foundation fixing part are integrated. Since the low-temperature water inlet and the low-temperature water outlet are on the bottom surface, the inside of the present invention can be completely drained as in the case where the low-temperature water inlet and the low-temperature water outlet are on the side surface in contact with the bottom. Further, since the entire height can be made lower than that of the first and second embodiments, the size can be reduced, and the depth under the floor required for installing the present invention can be made shallower than that of the above-described example. On the other hand, if a height adjustment mechanism is provided in the drainage water level adjustment chamber, the watertightness is reduced and there is a risk of water leakage, so that the height adjustment as in the second embodiment cannot be performed. For this reason, it is selected and executed according to a necessary function from among the following embodiments.

  FIGS. 9 and 10 show an embodiment with a sensor. FIG. 9 shows an embodiment in which an electrode type water level sensor is provided. In this figure, the low-temperature water inlet and the low-temperature water outlet are on the side surfaces, but may be provided on the bottom surface. When the bathtub cannot be equipped with a water level sensor due to the fact that the material of the bathtub cannot withstand drilling and is fragile, or is too hard and the cost of drilling is too high, or when you want to avoid attaching to the bathtub by design It is used to control the opening of the hot water supply valve when the water level drops. The water level sensor denoted by reference numeral 148 is attached to the drainage water level adjustment chamber denoted by reference numeral 231. The size ratio of the two chambers does not have to be 1: 1 and depends on the amount of drainage, but in order to reduce the size of the equipment, the side on which the water level sensor is attached, that is, the side of the drainage water level adjustment chamber becomes larger in comparison. .

  It is also possible to attach another sensor, for example, a temperature sensor, in place of the water level sensor, but as described in paragraph 0010, the longer the time after flowing out of the bathtub is, the lower the accuracy is. Attached near the low-temperature water inlet indicated by reference numeral 152 so that the water immediately after flowing from the bathtub touches as shown in FIG.

  FIG. 11 shows a construction example in which an overflowing effect of a flowing bathtub is added. A human sensor and a control panel are added to the embodiment described in paragraph 0016, and the flow control valve is electrically driven. In this embodiment, when a bather is detected by the human sensor 361, the opening of the motorized flow control valve 342 is reduced to overflow from the edge of the bathtub, and when no bather is present, the motorized flow control valve is opened. By increasing the amount of inflow into the present invention, it is possible to reduce overflow from the upper part of the bathtub. When overflowing from the edge of the bathtub, the bathtub water level is the height of the overflowing edge of the bathtub. However, when only the function of the present invention is used, the overflow surface of the present invention becomes the bathtub water level. Do not always match.

  FIG. 12 is a construction example diagram of the embodiment in which the water level and the temperature of the bathtub are controlled using the present invention having the water level sensor and the temperature sensor. While the water level sensor detects a drought, the replenishing amount is increased, and while the temperature sensor detects a low temperature, the bathtub water is actively replaced and the temperature is raised. Specifically, it is as described below. When the water level sensor 148 detects a drought, the hot water supply valve 351 is opened to supply hot water to the bathtub. When the bathtub water level rises and the water level sensor detects that water is full, the opening of the hot water supply valve is reduced, and the drainage and water level adjustment using the present invention is started. When the temperature sensor 158 detects a low temperature, the hot water supply valve 351 is opened to supply hot water to the bathtub. However, at this time, since the water level has not dropped, the replenished low-temperature hot water is supplied. The water is drained and hot water and low-temperature water are exchanged. When the temperature sensor detects a temperature rise to a set value, the opening of the hot / water replenishing valve is reduced, and drainage and water level adjustment using the present invention is started.

  Further, the effect by a human sensor can be added to make it as shown in FIG. The basic operation is the same as that of paragraph number 0023. When the motion sensor detects a bather, an overflow effect of paragraph number 0022 is performed.

  Instead of providing the vertical partition plates of Embodiments 1 to 6, a pipe may be provided vertically from the low-temperature water inlet, and the upper end of the pipe may be an overflow surface in the present invention. This is shown in FIGS. 14 to 19. As shown in FIG. 14, in the case of the embodiment in which the low-temperature water inlet and the low-temperature water outlet are provided on the side surface, an elbow is provided inside the low-temperature water outlet and then a pipe is connected vertically. As shown in FIG. 15, in the case of an embodiment in which a low-temperature water inlet and a low-temperature water outlet are provided on the bottom surface, a pipe is directly connected inside the low-temperature water outlet. At this time, it is possible to adjust the water level by manufacturing a vertical pipe longer at the time of manufacture and cutting the pipe according to the bathtub water level on site. Further, when implementing this embodiment, a valve socket is attached to the lower end of the vertical pipe, that is, the side connected to the low-temperature water outlet, and the cheese connected to the low-temperature water outlet or the low-temperature water outlet connecting the vertical pipe is formed into an internal thread. Good to keep. A female screw cheese may be used from the beginning, or a member for converting to a screw connection such as a faucet socket may be attached. By keeping the screw connection, the vertical pipe can be removed, making it easier to cut and manufacture and maintain the pipe, and replaceable, so that when the pipe is deteriorated or when cutting fails It is possible to respond. As shown in FIG. 16, the diameter of the vertical pipe can be expanded by using sockets of different diameters. In this case, the vertical pipe and the different diameter socket need to be fixed. Also, as shown in FIG. 16, the horizontal partition plate of reference numeral 175 is used as the bottom surface, and the horizontal partition plate is attached closer to the lid than the base fixing portion of reference numeral 177, so that the connection portion with the pipe is connected to the surface of the foundation or the like. Can be combined, making construction easier. Further, in this example, connection with piping other than the flange described in paragraph 0015 is shown, and the low-temperature water inlet is described as a female screw-in, and the low-temperature water outlet is described as connection with a socket. Even when the vertical pipe is attached to the low-temperature water inlet as shown in FIGS. 17 to 19, the basic function of the present invention can be performed.

  FIG. 20 is a full sectional view of the embodiment with the sensor attached. In this figure, a vertical pipe is provided on the low-temperature water outlet side. Although it is possible to provide the sensor at the low-temperature water inlet, a sensor is attached to the pipe side, and it is difficult to install the sensor in actual production. Also, in this drawing, the sensor is attached to the embodiment of FIG. 16, but it may be attached to the embodiment of FIGS. FIG. 21 is a construction example diagram combining the embodiment of FIG. 20 and a human sensor.

  Since the structure of the present invention is simple and does not require a power source except for an additional portion such as an effect, it can be applied not only to a floating bathtub but also to a waterscape facility such as an artificial pond.

110 Example 1 of the present invention
111 Main body 112 Low-temperature water inlet 113 Low-temperature water outlet 114 Lid 115 Horizontal divider 116 Vertical divider 117 Foundation fixing part 120 Second embodiment of the present invention
128 Height adjustment unit 130 Third embodiment of the present invention
132 Low temperature water inlet 133 of Example 3 Low temperature water outlet 137 of Example 3 Foundation fixing part 140 of Example 3 Example 4 of the present invention
148 Water level sensor 150 Example 5 of the present invention
152 Low-temperature water inlet 153 of the fifth embodiment 153 Low-temperature water outlet 158 of the fifth embodiment Temperature sensor 170 Seventh embodiment of the present invention
172 Low-temperature water inlet 173 of the seventh embodiment Low-temperature water outlet 175 of the seventh embodiment Horizontal partition 176 of the seventh embodiment Vertical pipe 177 Foundation fixing part 211 of the seventh embodiment Replenished hot water 212 Bath tub water 213 Water surface 214 of the present invention The present invention Overflow water 215 Overflow from the edge of bathtub 221 Flow of warm water flowing into the bathtub 222 Bathtub water level 231 Drainage water level adjustment chamber 232 Drainage outflow chamber 233 Partition plate overflow surface 241 Pipe type drainage water level adjustment chamber 242 Pipe type drainage outflow chamber 243 Pipe-type drain overflow surface 251 Depth under the floor required for installation of the present invention 310 Bathtub 320 Hot water discharge port 331 Drain valve 341 Manual flow control valve 342 Electric flow control valve 351 Hot water supply valve 361 Human sensor 362 Control board 421 Torii piping Department

Claims (26)

  A partition plate that divides the internal space into two chambers in the axial direction inside a columnar member with a hollow interior and upper and lower bottoms closed. A low-temperature water inlet is provided at the bottom of one chamber separated by the partition plate, and a low-temperature water outlet is provided at the bottom of the other chamber. Bath tub fixed temperature drainer characterized by having been installed   A low-temperature water inlet and a low-temperature water outlet are disposed on the bottom surface of a columnar member having a hollow inner bottom and an upper bottom and a lower bottom, and a pipe vertically connected to the low-temperature water outlet is provided inside the columnar member. Bath tub fixed temperature drainer characterized by being provided   A low-temperature water inlet and a low-temperature water outlet are disposed on the bottom surface of a columnar member having a hollow inner bottom and a lower bottom, and a pipe vertically connected to the low-temperature water inlet is provided inside the columnar member. Bath tub fixed temperature drainer characterized by being provided   4. The constant temperature bath tub drain according to claim 1, wherein a fixing portion is formed by providing a protruding edge on the bottom surface.   A partition plate that divides the internal space into two chambers in the axial direction inside a columnar member with a hollow interior and upper and lower bottoms closed. A low-temperature water inlet is provided on one side of the room separated by the partition plate, and a low-temperature water outlet is provided on the side of the other room. Bath tub fixed temperature drainer characterized by having been installed   The constant-temperature bath tub drain according to claim 5, wherein the low-temperature water inlet and the low-temperature water outlet are arranged at a height particularly in contact with a bottom surface.   A low-temperature water inlet and a low-temperature water outlet are disposed on the side surfaces of a columnar member having a hollow interior and an upper bottom and a lower bottom closed, and a pipe is vertically raised from the low-temperature water outlet vertically inside the columnar member. Tub fixed-temperature drainer characterized by having a pipe connected to it   A low-temperature water inlet and a low-temperature water outlet are disposed on the side surfaces of a columnar member having a hollow interior and an upper bottom and a lower bottom closed, and a pipe rises upward from the low-temperature water inlet vertically inside the columnar member. Tub fixed-temperature drainer characterized by having a pipe connected to it   9. The constant-temperature bathtub drainage according to claim 1, wherein a side surface of the columnar member extends downward from the low-temperature water outlet, and a fixed portion is formed by providing a protruding edge at a bottom of the extension portion. vessel A side surface of the columnar member is extended downward from the low-temperature water outlet, and a fixing portion formed by a side extension receiving portion formed in an enlarged shape of a cross section of the side extension portion and a protruding edge provided at a bottom of the side extension receiving portion. 9. The bathtub constant-temperature drainer according to claim 5, wherein the height of the upper end of the partition plate can be adjusted by being inserted into a height adjusting portion constituted by a portion and being held by holding means.   A side surface of the columnar member is extended downward from the low-temperature water outlet, and a fixing portion formed by a side surface extension receiving portion formed by reducing the cross section of the side surface extension portion and a protruding edge provided at the bottom of the side surface extension receiving portion. 9. The bathtub constant-temperature drainage device according to claim 5, wherein the height of the upper end of the partition plate can be adjusted by inserting a height adjusting portion constituted by a portion and holding the same by holding means.   The bathtub constant temperature drainer according to any one of claims 1 to 11, wherein the shape of the columnar member is a cylinder.   The bathtub constant-temperature drainage device according to claim 1, wherein the shape of the columnar member is a prism.   14. The bathtub constant temperature drainer according to claim 1, wherein an upper bottom of the columnar member is opened and closed by a lid member.   The bathtub constant-temperature drainage device according to claim 1, wherein a sensor is provided in a room where the low-temperature water inlet of the columnar member is provided.   The constant-temperature bath tub drain according to claim 15, wherein the sensor is a water level sensor.   The constant-temperature bath tub drain according to claim 15, wherein the sensor is a temperature sensor.   The constant-temperature bath tub drain according to claim 15, wherein both a water level sensor and a temperature sensor are provided as the sensor.   19. The bathtub constant-temperature drainer according to claim 1, wherein an outer surface of the device is painted according to an installation environment.   20. The bathtub constant-temperature drainage device according to claim 19, wherein the outer surface coating is artificial wood.   20. The bathtub constant temperature drainer according to claim 19, wherein the outer surface coating is a pseudo stone.   22. A method for draining a bath tub using the constant-temperature bath tub drainer according to claim 1, wherein a drain port is provided on a bottom surface of the bath tub, and an upper end of a partition plate in the bath tub constant temperature drainer is connected to the bottom of the bath tub. A horizontal pipe which is in line with the extension of the water surface and communicates between the standing pipe connected to the bathtub drain and the low-temperature water inlet of the bathtub constant-temperature drainer is horizontal or has a gradient in which the side of the bathtub constant-temperature drainer is lower. A drain port of the bathtub and a low-temperature water inlet of the constant-temperature bath tub are connected by a pipe, and a low-temperature water outlet of the constant-temperature bath tub is connected to a drain pipe.   A flow control valve is provided in a horizontal drawing pipe between the drain port of the bathtub and the bathtub constant-temperature drainage device, and the amount of drainage flowing into the bathtub constant-temperature drainage device can be adjusted by opening the valve. The bathtub drainage method according to claim 22, wherein   24. The flow rate control valve according to claim 23, wherein the flow rate control valve is an electric valve, and when the presence of a bather is detected by a human sensor, the opening of the flow rate control valve is reduced to overflow from the bathtub surface. Bathtub drainage method   A hot water supply valve is operated based on the detection result of each sensor using a bath tub constant temperature drainer provided with a water level sensor and a temperature sensor in a room provided with the low temperature water inlet according to claim 18. It is a method of managing the water level and temperature of the bathtub, wherein when the water level sensor detects that the water level falls below a preset water level, hot water is replenished to the set water level, and after reaching the set water level, the bathtub constant temperature drainage is performed. In addition to adjusting the water level due to overflow from the partition plate inside the vessel, when the temperature sensor detects that the temperature of the hot water in the bathtub has fallen below a preset temperature, the amount of hot water replenished is increased to reduce the temperature of the bathtub. A method for managing the water level and temperature of a bathtub, wherein the temperature of the water in the bathtub is raised by draining hot water in the bathtub.   A human sensor is further provided in the water level and temperature management method according to claim 25, and in addition to the water level and temperature management, when there is a bather, the opening of the motorized flow control valve is reduced to overflow from the bathtub surface. The water level and temperature management method of a bathtub according to claim 25, characterized in that:

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