JPH09253422A - Apparatus for purifying bathtub water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce equipment and running costs. SOLUTION: By a hot water temperature sensor 5, when the temperature of water in a bathtub 9 comes to a prescribed value or below, a valve 5 is opened, bathtub water is supplied from the bottom of a heat accumulation tank 1, high temperature accumulated water from the upper part of the tank 1 is mixed with circulating hot water of a circulation route X4 through a temperature decreasing part 2 and piping Y5, and the mixture is supplied to the bathtub 9. A outside air temperature sensor detects the temperature of outside air, the duty of an auxiliary heater 3 is calculated corresponding to the temperature, and the heater 3 is operated based on the results.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bath water purifying apparatus. 2. Description of the Related Art In recent years, a bathtub hot water purifying apparatus that keeps the hot water of the bathtub clean by repeatedly pumping the hot water of the bathtub through a predetermined purification mechanism and then returning it back to the bathtub has become widespread. In such a bath water purifying apparatus, the bath water is forcibly circulated by a circulation pump, filtered by activated carbon, sterilized by ozone, etc., and at the same time maintained at a predetermined temperature by an electric heater. It is normal. However, in the conventional purifying device, it is necessary to constantly heat the hot water with an electric heater in order to keep the hot water at an appropriate temperature, and there is a problem that the running cost becomes high. In view of such a problem, the applicant of the present application has a device for keeping hot water at a predetermined value by storing hot water in a heat storage tank using late-night power and supplying the hot water to the bathtub. Has been proposed by.

[0002]

However, when the heat storage tank is used, there is a problem that the heat storage tank becomes very large in order to completely cope with a decrease in the outside air temperature in winter or at night. For that purpose, auxiliary heaters are installed side by side,
It is possible to use an auxiliary heater auxiliary when the outside air temperature drops, but in this case the hot water in the heat storage tank will be used up unless the amount of hot water used in the heat storage tank and the auxiliary heater are used for an appropriate amount of time. Therefore, it is expected that the temperature cannot be maintained or the cost cannot be reduced by using the auxiliary heater more than necessary. The present invention aims to solve the above-mentioned problems.

[0003]

In order to achieve the above object, the present invention provides a bathtub hot water purifying device for circulating bathtub hot water by a circulation path between the bathtub and the cleaning mechanism, and a predetermined position of the circulation path. A means for storing while heating and introducing hot water from the bathtub, and means for supplying the hot and warmed hot water from the means for storing to the bathtub; Means for detecting the temperature of the bath, means for causing the means for supplying the hot water to supply to the bathtub when the temperature detected by the means for detecting falls below a predetermined temperature, and a bathtub Means for estimating the heat radiation amount of hot water, means for auxiliary heating of the bath water, and auxiliary heating according to the estimated heat radiation amount by means for estimating the heat radiation amount of the bath water The bath water is heated by the means for And means for controlling so as to comprising the. The means for storing stores the heated hot water by executing the heating operation at an appropriate time, so that it is possible to use, for example, late-night power, and the cost required for heating can be reduced. Further, since it is possible to use solar heat or the like and it is not necessary to always perform heating, the range of selection of the heat source is widened, and the heating cost can be reduced. Also, even if the amount of heat radiation is large and the temperature of the bathtub hot water cannot be maintained only by the stored hot water of the means for storing, the amount of heat radiation is estimated and the auxiliary heating is performed according to this estimated amount of heat radiation. Since the bath water is heated by the means, the predetermined temperature of the bath water can be maintained. Moreover,
Since the means for supplementarily heating according to the amount of heat radiation is used, the cost does not increase. The means for controlling, in accordance with the amount of heat radiation and the temperature and amount of hot water stored in the means for storing, of means for supplementary heating necessary to maintain the heat retention temperature of the bath water. Efficient auxiliary heating can be performed by calculating the duty and causing the auxiliary heating means to heat the bath water based on the duty. Further, the control means may be configured to control the supply amount of the hot water to the bathtub in addition to the control of the auxiliary heating means according to the estimated heat radiation amount. In this case, the temperature of the bath water can be maintained with higher accuracy. The heat radiation amount of the bath water can be estimated from the outside air temperature, the temperature decrease rate of the bath water, and the operating time and non-operating time of the hot water supply.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the hot water in the bathtub 9 is passed through the circulation path X1 and the circulation path X2 by the pump 6, and the sterilizer 7
It is configured to be sterilized by the above, further passed through the circulation path X3, passed through the filtration device 8 to be purified, passed through the auxiliary heater 3, and returned from the circulation path X4 to the bath 9. The arrangement of the pump 6, the sterilization device 7, the filtration device 8 and the auxiliary heater 3 can be changed, and other devices and the like can be added. A hot water temperature sensor 5 is provided in the circulation path X1 near the exit of the bath tub 9 so as to detect the temperature of the hot water in the bath.

A pipe Y1 is connected to the circulation path X2 and is connected to a valve 4. The valve 4 is opened and closed by the control device 21, and is configured to be opened and closed according to the temperature of the bath water from the hot water temperature sensor 5. The pipe Y1 can be connected to, for example, the outlet side of the filtration device 8 to introduce the purified bath water into the heat storage tank 1. A pipe Y2 is provided on the outlet side of the valve 4 so as to be connected to the temperature lowering section 2 and the pipe Y3 is branched and connected to the bottom surface side of the heat storage tank 1.

The heat storage tank 1 has a high heat insulating property and is designed to store the hot water stored therein while maintaining the temperature of the hot water stored therein. The heat storage tank 1 is equipped with a heater 10,
It is turned on at a predetermined time in the middle of the night and heats the hot water inside the heat storage tank 1 by using the late night electric power which is cheap. The pipe Y3 is connected to the bottom surface of the heat storage tank 1, so that the bath water having a low temperature collects below the heat storage tank 1,
The high-temperature hot water heated by the heater 10 collects on the upper side of the heat storage tank 1. Reference numeral 11 is a hot water sensor.

A pipe Y4 is provided above the heat storage tank 1 so that high temperature hot water is supplied to the temperature lowering section 2. The hot water is supplied from the heat storage tank 1 by the inflow pressure of the hot water from the pipe Y3 to the heat storage tank 1, and when the hot water having a low temperature is supplied from the pipe Y3 to the heat storage tank 1. Heat storage tank 1
From the above, hot hot water is supplied to the temperature lowering unit 2 through the pipe Y4. Since the bath hot water is supplied to the heat storage tank 1 by opening and closing the valve 4, the opening and closing of the valve 4 eventually controls the supply of hot water to the temperature lowering unit 2.

In this embodiment, the temperature drop in the temperature drop section 2 is carried out by mixing hot hot water from the pipe Y4 and cold bath water from the pipe Y2. In this embodiment, Hot water having a predetermined temperature is supplied to the pipe Y5 by using a thermo valve. Instead of this, it is also possible to reduce the temperature, for example, by mixing new tap water.

The outside air temperature sensor 20 detects the outside air temperature, and the detected outside air temperature is supplied to the control device 21. As shown in FIG. 2, the control device 21 is mainly composed of a microcomputer, and inputs signals from the hot water temperature sensor 5 and the hot water temperature sensor 11 in addition to the signals from the outside air temperature sensor 20, and also an auxiliary heater. 3 stop of operation, opening / closing of valve 4, start / stop of pump 6, stop of operation of heater 10 and the like are controlled. Further, the control is performed in response to various commands from the remote controller 22 provided in the bathroom or the like. When a control command is issued from the remote controller 22, the control device 21 operates the pump 6 to circulate the bath water. When the predetermined time (11:00 pm) comes, the heater 10 is operated, the hot water in the heat storage tank 1 is heated by the midnight power, and the heating of the heater 10 is stopped at the predetermined time (7:00 am). Has become.

When the controller 21 detects that the temperature of the hot water from the hot water sensor 5 is lower than a predetermined temperature (the set warming temperature of the bath water), it sends a signal to the valve 4 to open it.
High-temperature hot water is supplied from the heat storage tank 1 to the bathtub 9 through the temperature lowering section 2 and the pipe X4. Thereby, the temperature of the hot water in the bathtub 9 is maintained at a predetermined temperature.

The control device 21 is adapted to estimate the heat radiation amount of the hot water in the bathtub. This estimation is performed by the outside air temperature detected by the outside air temperature sensor 20, the rate of decrease in the hot water temperature from the hot water temperature sensor 5, or the valve 4. It can be inferred from the opening time and closing time of. Further, the control device 21 calculates the duty of the auxiliary heater 3 according to the estimated heat radiation amount, and controls based on this duty. That is, the heat storage tank 1
Is known and the temperature of the hot water of the bathtub 9 to be maintained is also known by the setting of the remote controller 22, so that the heat is supplied from the heat storage tank 1 to the bathtub 9 according to the amount of heat radiation. It is possible to estimate the amount of hot water.
When the amount of hot water required for supply exceeds the capacity of the heat storage tank 1, the duty of the auxiliary heater 3 for heating the hot water in the bathtub is calculated.

If the auxiliary heater 3 is operated in accordance with the calculated duty, the auxiliary heater 3 is operated at a minimum to minimize the running cost, and furthermore, the hot water from the heat storage tank 1 is not deficient, and the bath 9 is emptied. It is possible to maintain the temperature of the bath water at a desired temperature. The operation of the auxiliary heater 3 may be continuously performed continuously or intermittently. Further, various modes such as operation after the high temperature hot water of the heat storage tank 1 is exhausted are possible.

A case of estimating the heat radiation amount per unit time of bath water by measuring the time from the closing of the valve 4 to the opening thereof, that is, the time when the heat storage tank 1 is not performing heat retention heating and a case of calculating the duty. Will be explained. For example, the heat radiation amount per hour under the following conditions can be calculated by the following equation.・ Bath water capacity of bath tub: 200 L ・ Temperature width during heat retention control: 0.5 ° C ・ Time from closing valve 4 to opening: 15 minutes Heat release amount per hour = 0.5 ° C × 200 L × (60/15) min = 400 kcal Therefore, to keep the bath water warm, 400 kca per hour
It can be seen that a calorie of 1 is required. On the other hand, the amount of heat that can be used for heat retention stored in the heat storage tank 1 is as follows: -Capacity of the heat storage tank: 100 L-Temperature of the heat storage tank 1: 85 ° C (85-42) ° C × 100L = 4
It will be 300 kcal. In order to keep warm for 16 hours during the time when midnight power cannot be used, (400 × 16) kcal−4300kcal =
2100 kcal must be heated by the heater 10. Assuming that the amount of heat generated by the heater 10 is 400 W, the amount of heat that can be generated by this heater in one hour is 860 kcal / kW × 0.4 kW = 344 k
It becomes cal and it can be seen that the heater 10 cannot maintain heat. Therefore, considering that the temperature is not kept only by the heat source of the heat storage tank 1 from the initial stage of keeping the heat but also the heater 10 is used together to keep the temperature, 2100 kcal / 16 = about 131 kcal /
Since it is sufficient to supply the heat of the hour from the heater 10, this value is smaller than 344 kcal, and thus it is possible. Therefore, when the heat retention control is performed, the heat amount of 131 kcal per hour, that is, 60 minutes × 131/344 = about 23 minutes, is first applied to the heater 10, and the remaining heat retention control is performed by the heat source of the heat storage tank 1. For example, the bath water can be kept warm at a temperature that allows bathing all day long. In this example, the usage rate of the heat source was calculated by calculation based on the closing time of the valve 4, but the rate corresponding to the bath water temperature decrease rate is stored in the storage medium and read out as necessary for heat retention control. You may use it. It is also possible to calculate the amount of stored hot water used for keeping the bath water warm based on the opening time of the valve 4 and thereby obtain the amount of heat radiation. Also, since the above calculation changes depending on the amount of bath water in the bathtub, in order to correspond to bathtubs with different capacities, the bathtub capacity can be entered via the operation setting device to change the calculation formula or read the stored data reading area. May be changed.

If the temperature drop section 2 is a mixing valve capable of changing the mixing ratio of the hot water from the pipe Y4 and the bath water from the pipe Y2, and the mixing ratio is controlled by the controller 21, It is possible to perform temperature control with higher accuracy than in the case of only controlling the auxiliary heater 3.

Next, the operation will be described. The bathtub hot water of the bathtub 9 passes through the circulation path X1, is sucked by the pump 6, and is sent out to the circulation path X2. Normally, the valve 4 is closed, and all the bath water is sent to the sterilization device 7, purified by the filter device 8 through the circulation path X3, and returned to the bathtub 9 through the circulation path X4.

As shown in FIG. 3, when the hot water temperature sensor 5 detects that the temperature of the hot water in the bathtub is below a predetermined temperature (step S1), the control device 21 opens the valve 4 (step S2). , Part of the bath water is pipe Y1, pipe Y2
And to the heat storage tank 1 via the pipe Y3. The heat storage tank 1 stores hot water heated by midnight power,
When the bath water is injected from the lower side, the high temperature hot water is discharged from the upper side through the pipe Y4. Hot water having a high temperature is mixed with the bath water from the pipe Y2 in the temperature lowering section 2 through the pipe Y4, and the temperature is lowered to a predetermined temperature. The hot water whose temperature has been lowered to a predetermined temperature is mixed with the circulating bath water in the circulation path X4 via the pipe Y5 and supplied to the bath 9. The control device 21 estimates the heat radiation amount by any of the methods described above (step S
3) The duty of the auxiliary heater 3 is calculated (step S4). Then, it is confirmed whether the auxiliary heater 3 is on or off (step S5). If the auxiliary heater 3 is off, the auxiliary heater 3 is turned on.
The auxiliary heater 3 is operated according to the calculated duty (step S6). If the temperature of the hot water in the bathtub is equal to or higher than the predetermined temperature in step S1, it is not necessary to heat the bath water.
Is closed (step S7) and the auxiliary heater 3 is turned off (step S8).

The operations of steps 3 and 4 may be performed in advance at a predetermined time and the duty may be stored in advance, or the interrupt operation may be performed at the predetermined time and the duty may be stored. .

Further, in the above operation, the mixing of the hot water from the heat storage tank 1 and the heating by the auxiliary heater 3 are performed in parallel at the same time, but the present invention is not limited to this, and is calculated as described above. It suffices to operate the auxiliary heater 3 so as to satisfy the duty, and for example, control such that only the auxiliary heater 3 is operated for a predetermined time is possible.

By the above operation, the temperature of the bath water in the bath 9 is maintained at a predetermined temperature. The heating in the heat storage tank 1 does not always have to be performed, and since it is possible to use the midnight power as in this embodiment, the cost required for heating can be reduced. Further, since the duty of the auxiliary heater 3 is calculated according to the estimated heat radiation amount and the auxiliary heater 3 is operated, the operation of the auxiliary heater 3 is suppressed to the minimum and the bath water temperature of the bath 9 is maintained at a predetermined temperature. It will be possible.

[0020]

As described above, according to the bath water purifying apparatus of the present invention, it is not necessary to constantly heat the bath water, and it is possible to use late-night electric power, solar heat, etc. as a heating heat source, and also to supplementarily heat the bath water. Since the means can be minimized in use depending on the outside air temperature, the cost required for heating can be reduced and the running cost can be reduced. Further, the cost of the apparatus can be reduced without requiring a large-sized means for storing.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the control device 21 according to the embodiment of the present invention.

FIG. 3 is a flowchart diagram illustrating an operation of temperature control according to the embodiment of the present invention.

[Explanation of symbols]

1: heat storage tank, 2: temperature drop section, 3: auxiliary heater,
4: Valve, 5: Hot water temperature sensor, 6: Pump, 7: Sterilization device, 8: Filtration device, 9: Bathtub, 10: Heater, 11: Hot water temperature sensor, 20: Outside air temperature sensor, 21: Control device, 2
2: Remote control.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical location C02F 1/50 531 C02F 1/50 531R 540 540A 550 550B 560 560B 1/78 1/78 F24H 9 / 00 F24H 9/00 W 9/20 9/20 A (72) Inventor Fumiyuki Mishima, 1463 Asama-cho, Hachioji-shi, Tokyo Within Jamme Sewing Machine Co., Ltd. (72) Inventor Yasuhiko Komiya Hachioji, Tokyo No. 1463, Hazama-machi, within the Jamino Sewing Machine Co., Ltd. (72) Inventor, Takashi Nakamura, No. 1463, Sasama-cho, Hachioji, Tokyo (72) Within the Jamno Sewing Machine Co., Ltd. (72) Mineo Suzuki, Midori Ward, Nagoya City, Aichi 1 at 20 Kitakanzan, Takamachi character Chubu Electric Power Co., Inc. (72) Inventor Tadashi Nozawa 15-1 Ushijimacho, Toyama City, Toyama Prefecture Hokuriku Electric Power Company (72) Inventor Shuichi Aoyama 15-1 Ushijima-cho, Toyama City, Toyama Prefecture Hokuriku Electric Power Company (72) Inventor Shuzo Kakuchi 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Ltd. (72) Inventor Mitsuyuki Aoki 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc.

Claims (6)

[Claims] 1. A bathtub hot water purifying device for circulating bathtub hot water by a circulation path between a bathtub and a cleaning mechanism, which is connected to a predetermined position of the circulation path to introduce and heat the bath water to keep it warm. Meanwhile, a means for storing, a means for supplying heated and kept hot water from the means for storing to the bathtub, a means for detecting the temperature of the bathtub hot water, and a means for detecting the temperature A means for causing the means for supplying the hot water to be supplied to the bathtub when the temperature detected by the means becomes equal to or lower than a predetermined temperature; a means for estimating the heat radiation amount of the bathtub hot water; For controlling the heating of the bathtub hot water by the means for auxiliary heating according to the estimated heat radiation amount by the means for estimating the heat radiation amount of the bathtub hot water. The means of Bathtub hot water purifying apparatus and butterflies. 2. The control means is an auxiliary device required to maintain the predetermined temperature of bath water according to the estimated heat radiation amount and the temperature and amount of hot water stored in the means for storing. The bath water purifying apparatus according to claim 1, wherein the duty of the heating means is calculated, and the means for auxiliary heating is caused to heat the bath water based on the duty. 3. The control means controls the supply amount of the hot water to the bath in addition to the control of the auxiliary heating means in accordance with the detected auxiliary heating means. The bath water purifying apparatus according to claim 1 or 2. 4. The bath water purifying method according to claim 1, 2 or 3, wherein the means for estimating the heat radiation amount of the bath hot water detects the outside air temperature and estimates the heat radiation amount based on the outside air temperature. apparatus. 5. The means for estimating the heat radiation amount of the bath water detects the temperature decrease rate of the bath water and estimates the heat radiation amount based on the temperature reduction rate. The bath water purification device described. 6. The means for estimating the heat radiation amount of the bath water detects the operating time or non-operating time of the means for supplying the hot water to the bath, and estimates the heat radiation amount based on the time. The bathtub water purifying apparatus according to claim 1, 2 or 3.