JPH04158126A - Automatic hot water supply device - Google Patents

Abstract

PURPOSE:To facilitate supply of hot water at a desired temperature into a bathtub or the like, by providing a means for controlling the temperature of hot water supplied through regulating the mixing ratio at a mixing valve on the basis of data sent from a temperature sensor. CONSTITUTION:Water raised in temperature by heating in a main body l of a water heater is mixed with cold water by a variable mixing ratio type mixing valve 8 under the control of a controller 15, whereby hot water at a desired temperature is supplied to the exterior. The controller 15 is capable of setting a target temperature for hot water to be supplied into a hot water tank such as a bathtub. The controller 15 controls the temperature of hot water to be supplied through regulating the mixing ratio at the mixing valve 8 on the basis of data sent from a sensor 14 for hot water temperature in the tank 7, which is to be supplied with hot water. When the hot water temperature in the tank 7 detected by the sensor 14 is lower than a set temperature, the control means supplies hot water at a temperature higher than the set temperature so as to obtain the set temperature. When the detected temperature is higher than the set temperature, the control means supplies hot water at a temperature lower than the set temperature so as to obtain the set temperature. Hot water at a desired temperature is thus easily supplied into a hot water tank such as a bathtub.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic hot water supply device that adjusts the temperature of hot water in a water heater body and supplies it to a bathtub or the like.

(Prior art) Conventional water heaters use a mixing valve with a variable mixing ratio to mix the hot water heated by the water heater body with water at an appropriate ratio to supply hot water at a desired temperature. In order to supply hot water at a predetermined temperature to bathtubs, etc., the temperature of the supplied hot water can be adjusted manually by adjusting the mixing ratio to bring hot water to the desired temperature in the bathtub. I was looking forward to it.

With conventional automatic water heaters, the user manually sets the desired hot water temperature in the bathtub, and the control device supplies hot water at a temperature that is a certain temperature added to the set temperature. The system was designed to supply hot water to a temperature close to the desired temperature.

(Problem to be Solved by the Invention) However, in conventional automatic water heaters, hot water is supplied at a high temperature by adding a certain temperature to the set temperature. There were problems in that the hot water did not reach the desired temperature or it took a long time to reach the desired temperature, and if the additional temperature was set too high, the temperature in the bathtub would become higher than the desired temperature that was set.

Particularly in winter, when the bathtub, piping, etc. are excessively cooled or there is residual hot water, it is difficult to supply hot water to the bathtub at an appropriate temperature.

The present invention has been made to solve the problems of the prior art described above, and an object of the present invention is to provide an automatic hot water supply device that can easily supply hot water at a desired temperature into a bathtub or the like.

[Means to solve the problem]

Therefore, the automatic water heater according to the present invention includes a mixing valve with a variable mixing ratio that mixes hot water from the water heater main body with water at a temperature lower than the temperature of the hot water, and a hot water supply device that receives the supply of the mixed hot water. A temperature sensor detects the temperature of the hot water in the hot water tank, and the temperature of the hot water to be supplied is controlled by setting the reached temperature of the hot water in the hot water tank and changing the mixing ratio of the mixing valve based on information from the temperature sensor. If the temperature of the hot water in the hot water tank detected by the temperature sensor is lower than the set temperature, the control means controls the hot water at a temperature higher than the set temperature in accordance with the difference. is supplied to the hot water tank, and when the hot water temperature in the hot water tank detected by the temperature sensor is higher than a set temperature, control is performed to supply hot water at a temperature lower than the set temperature in response to the difference. The purpose of the present invention is to achieve the above-mentioned object by the configuration.

[For production]

With the above configuration, the hot water that has been heated in the water heater main body and whose temperature has risen can be mixed with water by a mixing valve with a variable mixing ratio under the control of the control device to supply hot water at a desired temperature to the outside. can.

The control device can set the ultimate temperature of hot water in a hot water tank such as a bathtub to which hot water is supplied, and adjusts the mixing temperature of the mixing valve based on information from a temperature sensor that detects the temperature of hot water in the hot water tank that receives hot water supply. The temperature of the hot water supplied is controlled by changing the ratio.

That is, when the temperature of the hot water in the hot water tank detected by the temperature sensor is lower than the set temperature, the control means supplies hot water at a temperature higher than the set temperature to the hot water tank in accordance with the difference, and the hot water detected by the temperature sensor is supplied to the hot water tank. When the hot water temperature in the hot water tank is higher than the set temperature, the hot water temperature in the hot water tank is controlled to be the set temperature by supplying hot water with a temperature lower than the set temperature in response to the difference, and the hot water temperature in the hot water tank is controlled to be the set temperature. You can easily supply hot water at the desired temperature.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the automatic hot water supply apparatus based on this invention will be explained by an Example.

FIG. 1 is a block diagram of main parts showing the configuration of an embodiment of the present invention. The configuration and operation of the embodiment will be described together with reference to the same figure.

The water heater main body 1 consists of a first water heater main body 1a and a second water heater main body 1b, and takes in tap water from a water tap 2 and supplies water to the lower part of the interior of the first water heater main body 1a. When the first water heater main body 1a becomes full of water, water is supplied to the first water heater main body 1a.
The water enters the lower part of the second water heater body 1b from the upper part of the water heater body 1b, and the second water heater body 1b is also filled with water.

and first and second water heater bodies 1a.

Electric heaters 3a, 3 attached to a relatively lower part inside 1b
energize b to heat the water supply in the water heater main body 1a, lb,
The water is boiled to a set temperature, for example 88°C or 65°C, and stored inside the water heater body 1a, lb.

Hot water to the outside is taken out from the upper part of the second water heater main body 1b, and tap water corresponding to the amount of hot water taken out is automatically pumped into the water heater main bodies 1a, 1b from the water tap 2 as described above. It is always kept full of water.

A sensor 4 for detecting remaining hot water is installed at the top of the water heater body 1a, lb.
a and 4b are attached so that the temperature of the hot water in the relatively upper part of the water heater body can be detected. In addition, sensors 5a and 5 for temperature control are installed at the bottom of the water heater bodies ia and tb.
b is attached so that the temperature of hot water relatively lower in the water heater body can be detected.

The hot water supply line to the outside is piped to a required location from a high temperature hot water line 6 that directly supplies high temperature hot water boiled in the water heater main body 1 or from the second water heater main body 1b. An automatic hot water supply line 13 is prepared that does not directly supply high-temperature hot water boiled in the water heater body 1, but instead supplies hot water at a constant temperature of, for example, 42°C to a hot water tank 7 such as a bathtub. A mixing valve 8 with a variable mixing ratio is provided to mix high-temperature hot water and tap water from the faucet 2 to obtain hot water at a predetermined temperature. The receiver is temporarily accepted into Jistern 10 via the route. The distern 10 is necessary to prevent mixed hot water from flowing back into the water heater body, and is provided with a plurality of sensors 14 for detecting the internal water level.

Hot water is fed under pressure from the distiller 10 by a hot water supply pump 11, and can be supplied to a hot water tank 7, etc. via an automatic hot water supply line 13 via a flow rate regulating valve 12 whose opening degree is variable.

A sensor 14 is installed in the hot water tank 7 to detect the hot water level and temperature within the tank.

The control device 15 controls settings such as the boiling temperature of the water supplied to the water heater main body 1, the temperature of hot water in the hot water tank 7 supplied from the automatic hot water supply line 13, and the amount of hot water supplied, and the various valves, pumps, and electric heaters mentioned above. The configuration is such that it controls and executes the functions and outputs display signals. And control device 1
In addition to the above-mentioned setting operations and display performed from the main operation remote control device 16 of 5, the on-site remote control device 1 allows setting operations to be performed from a place where hot water is supplied such as a bathroom.
7 is included. Note that 18 is a control board of the control device 15, in which an arithmetic processing unit (CPU) and a storage device are incorporated.

A 200V commercial power supply is connected as a power supply equipment to the electric heaters 3a and 3b, and a clock device 19 and an integrated wattmeter 2
0 and is turned on and off while measuring time under the control of the control device 15.

Further, a 100V power source is connected to the control device 13 for control purposes. A signal transmission path 21 is connected between each sensor, each operation control unit, remote control device 16, 17, and control device 15, so that electrical signals or optical signals for control are transmitted. .

With the above configuration, main operation remote control device 1
6 or the on-site remote control device 17 sets the hot water temperature in the water heater main body 1, the reached temperature of the hot water in the hot water tank 7, and the amount of hot water supplied, and the control device 15 sets the set values and information from each related sensor. Automatic control is performed based on the desired hot water supply.

The control device 15 sets the attained temperature of the hot water in the hot water tank, controls the mixing ratio of the mixing valve 8 whose mixing ratio is variable based on information from the sensor 14 that detects the temperature of the hot water in the hot water tank, and controls the automatic hot water supply line 13. It is also a control means for controlling the temperature of hot water supplied to the hot water tank 7 via the hot water tank 7.

Next, the characteristic control of this embodiment will be explained with reference to the flowchart of FIG.

FIG. 2 is a flowchart of control for supplying hot water at a desired temperature into the hot water tank 7, such as a bathtub.

First, in step S1, the temperature of hot water supplied to the hot water tank 7 is
The mixing ratio of the mixing valve 8 is determined as the set temperature T1 of the hot water in the hot water tank receiving the hot water supply, and hot water supply is started.

In step S2, the difference ΔT between the set ultimate temperature Tl and the hot water temperature T2 in the hot water tank detected by the sensor 14 is calculated, and in step S3, if ΔT is 0°C, the process returns to step S1 and the hot water at the set ultimate temperature TI is Continue supplying hot water.

If △T is not 0°C in step S3, proceed to step S4; if △T exceeds 5°C, proceed to step S5;
Control the mixing ratio of the mixing valve to reach the set temperature T1
Supply hot water at a temperature that is equal to or greater than 1.

If ΔT is 5°C or less in step S4, step S6
If 8T exceeds 0° C., the process proceeds to step S7, where the mixing ratio of the mixing valve is controlled to supply hot water at a temperature equal to the set attained temperature T1 plus α2.

If ΔT is 0°C or less in step S6, step S8
If ΔT exceeds 15°C, the process proceeds to step S9, where the mixing ratio of the mixing valve is controlled to reach the set temperature TI.
Hot water is supplied at a temperature equal to α3.

If ΔT is less than -5°C in step S8, step S
Proceeding to IO, the mixing ratio of the mixing valve is controlled to supply hot water at a temperature equal to the set final temperature TI plus α4.

Then, from steps S5.7 and 9.10, step S
Return to step 2, calculate ΔT, and return the above control to green.

The value of each α shall be set by determining a temperature suitable for the equipment within the range α1>α2>0°C>α3>α4.

According to the above control, when starting hot water supply, the hot water supply is first started at the set temperature, and when the hot water temperature in the hot water tank detected by the temperature sensor 14 is lower than the set temperature, that is, in step 54.6, the difference is 4. Corresponding to the magnitude of ΔT, hot water with a temperature higher than the set temperature is supplied to the hot water tank, and when the temperature of the hot water in the hot water tank detected by the temperature sensor is higher than the set temperature, that is, in step S8, the difference ΔT is Correspondingly, by controlling the supply of hot water at a temperature lower than the set temperature,
The hot water temperature T2 in the hot water tank becomes the set ultimate temperature TI.

〔Effect of the invention〕

As explained above, according to the present invention, hot water can be automatically supplied at a set temperature and in a set amount through normal hot water supply control, and hot water can also be supplied at a high temperature.

The hot water heated in the water heater main body and raised in temperature can be mixed with water by a mixing valve with a variable mixing ratio under the control of the control device, and can be supplied to the outside as hot water at a desired temperature.

The control device can set the ultimate temperature of hot water in a hot water tank such as a bathtub, and controls the mixing of the mixing valve based on information from a temperature sensor that detects the temperature of hot water in the fA hot water tank that receives hot water supply. The temperature of the hot water supplied is controlled by changing the ratio.

That is, when the temperature of the hot water in the hot water tank detected by the temperature sensor is lower than the set temperature, the control means supplies hot water at a temperature higher than the set temperature to the hot water tank in accordance with the difference, and the hot water detected by the temperature sensor is supplied to the hot water tank. When the hot water temperature in the hot water tank is higher than the set temperature, the hot water temperature in the hot water tank is controlled to be the set temperature by supplying hot water with a temperature lower than the set temperature in response to the difference, and the hot water temperature in the hot water tank is controlled to be the set temperature. It is possible to provide an automatic hot water supply device that can easily supply hot water at a desired temperature.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a main part showing the configuration of an embodiment of the present invention, and FIG. 2 is a flowchart showing the characteristic control of the above embodiment. 1, (la, 1b) - = Water heater main body 2 - - Faucet 3 a, 3 b = - Electric heaters 4a, 4b - Sensors 5a, 5b for detecting remaining hot water - Temperature Control sensor 6...
・・High-temperature water line 7 ・・Hot water tank 8 ・Mixing valve 9 ・・Electric valve 10 ・・・・・ Disturn 11 ・・・Hot water supply pump 2 ...Flow rate adjustment valve 13--Automatic hot water supply line 14--Sensor 15--Control device 16--Main operation remote control device 17
...--On-site remote control device 18...
... Control board 19 --- Timing device (power receiving equipment) 20 ---
Integrating wattmeter (power receiving equipment) 21 --- Signal transmission line

Claims (1)

[Claims] a mixing valve with a variable mixing ratio that mixes hot water from the water heater main body with water at a temperature lower than the temperature of the hot water; a temperature sensor that detects the temperature of hot water in a hot water tank that receives the supply of the mixed hot water; An automatic hot water supply device comprising: a control means for setting the ultimate temperature of hot water in the hot water tank and controlling the temperature of the hot water to be supplied by changing the mixing ratio of the mixing valve based on information from the temperature sensor; , when the hot water temperature in the hot water tank detected by the temperature sensor is lower than the set temperature, the control means supplies hot water at a temperature higher than the set temperature to the hot water tank in accordance with the difference; An automatic hot water supply device characterized in that, when the temperature of hot water in a hot water tank is higher than a set temperature, control is performed to supply hot water at a temperature lower than the set temperature in response to the difference.