JP3122383B2 - Hot water supply device with automatic water stop function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply means for heating water supplied from a water supply channel and discharging hot water through the hot water supply channel.
Hot water supply flow rate measuring means provided in the water supply path or the hot water supply path, water stoppage means provided in the water supply path or the hot water supply path, based on measurement information from the hot water supply flow rate measurement means and an external command input. Hot water supply control means for controlling the hot water supply combustion operation of the hot water supply means and the water stoppage operation of the water stop means, so that the hot water supply means discharges hot water at a target temperature by the target total amount of hot water supply so that hot water supply can be automatically stopped. The present invention relates to a hot water supply device with an automatic water shutoff function, wherein the hot water supply path is branched into two or more systems on the downstream side.

[0002]

2. Description of the Related Art Conventionally, in this type of hot water supply apparatus, a hot water supply control means cannot set a plurality of target temperatures by inputting an external command, and is used as a hot water supply for a kitchen after being used as a hot water supply for a bathtub, for example. In such a case, unless the target temperature is reset, the temperature does not reach a temperature suitable for hot water supply for a kitchen, and a target temperature suitable for each hot water supply cannot be selected and hot water supply cannot be performed easily.

In order to solve such a problem, for example, Japanese Unexamined Patent Publication No.
Japanese Patent Application Laid-Open No. 2-129552 discloses a hot water supply apparatus in which a hot water supply side is branched into two or more paths, a mechanism for controlling the amount of water is provided in each path, and a closing function is provided in at least one of the paths. A configuration is described in which a plurality of target temperatures can be set.

[0004]

However, in a hot water supply device with an automatic water shutoff function in which a hot water supply path is branched into two or more systems on the downstream side, if only a plurality of target temperatures can be set, for example, an automatic When the set temperature is switched to a high temperature due to the operation of the water stopping function, a hot water supply may be inadvertently performed at a high temperature to a user on another route who does not know the fact, which is very dangerous. In particular, when the water shutoff function is provided only in a part of the routes as in the hot water supply device shown in FIG. 1 described in Japanese Patent Application Laid-Open No. 62-142952, such a danger is caused in the remaining routes. Was likely to occur.

The present invention has been made in view of such a point, and an object of the present invention is to provide an automatic water shutoff system which can set a plurality of target temperatures and has a low danger due to a temperature change after the operation of the automatic water shutoff function. It is to provide a hot water supply device with a function.

[0006]

To achieve the above object, the present invention is characterized in that a hot water supply means for heating water supplied from a water supply channel and discharging hot water through the hot water supply channel; A hot water supply flow rate measuring means provided in the hot water supply path, a water stopping means provided in the water supply path or the hot water supply path, and the hot water supply means based on measurement information from the hot water supply flow rate measurement means and an external command input; Hot water supply control means for controlling hot water supply combustion operation of the hot water supply means and water stoppage operation of the water stop means so that hot water at a target temperature is discharged by a target total amount of hot water supply and the hot water supply can be automatically stopped. In a hot water supply device with an automatic water shutoff function, in which the water path is branched into two or more systems on the downstream side, the hot water supply path is provided on the downstream side of the water stoppage means.
The system is branched into two or more systems, and the hot water supply control means allows hot water to be supplied at any one of the target temperatures while permitting the setting of a plurality of target temperatures, and sets the hot water supply at the time of the automatic water stoppage. The point is that control is performed so as to automatically select the target temperature having the lowest set temperature.

[0007] In the above SL configurations, at least one of said hot water supply passage branched, it is hot water path for the bathtub is preferable from the viewpoint of effect of the later.

Further, the hot water supply means is configured to mix and supply the water supplied from the water supply passage to the hot water supply passage so that the temperature after mixing can be adjusted. Is preferred.

Further, the hot water supply control means compares a predetermined safe temperature with a plurality of the target temperatures, and if a target temperature exceeding the safe temperature is not set, the automatic hot water shutoff before the hot water supply is set. It is preferable to control so that the set target temperature is automatically selected from the viewpoint of the operation and effect described later.
Here, the safe temperature refers to a temperature at which there is little danger of, for example, a user being burned even when hot water is supplied at that temperature, and is about 50 ° C. in the present invention, for example.

According to the above-mentioned feature of the present invention, the hot water supply control means allows hot water to be supplied at any one of the target temperatures while allowing a plurality of target temperatures to be set. If a plurality of target temperatures are set in order to perform such control, it is possible to select an arbitrary target temperature and supply hot water, thereby saving the trouble of setting each temperature. In addition, since the hot water supply control means controls the automatic selection of the lowest set temperature among the set target temperatures at the time of the automatic water stoppage, the automatic hot water supply is performed and the hot water supply temperature is higher. Thus, the hot water is not supplied again, and the danger caused by the change in the hot water supply temperature can be avoided. As a result, it was possible to provide a hot water supply device with an automatic water shutoff function that can set a plurality of target temperatures and has little danger due to a temperature change after the automatic water shutoff function is activated.

Further, at least one of the branched hot water supply paths is provided.
First, if it is a hot water supply channel for a bath tub, it is very convenient because water can be automatically shut off when hot water is supplied to the bath tub, and the hot water supply route for the bath tub may have a different temperature from other hot water supply routes. Since there are many, setting of a plurality of target temperatures becomes more effective. And usually, since the hot water supply temperature for the bathtub is higher than other places of use, the other set hot water supply temperature is automatically selected at the time of automatic water stoppage, while avoiding the danger due to the change of the above hot water supply temperature, There is almost no need to reselect the set temperature, which is convenient for the user.

When the hot water supply means is configured to mix and supply water supplied from the water supply path to the hot water supply path and adjust the temperature after mixing, the temperature of the hot water in the hot water supply path after heating is adjusted. Regardless, water can be mixed and supplied, and the temperature after mixing can be adjusted, so that heating before mixing can be performed under advantageous conditions and the like.

Further, the hot water supply control means compares a predetermined safe temperature with a plurality of the target temperatures, and if a target temperature exceeding the safe temperature is not set, the automatic hot water supply before the hot water supply is stopped. When controlling to automatically select the set target temperature, when the target temperature exceeding the safe temperature is not set, there is no need to avoid the danger caused by the change in the hot water supply temperature described above. Is automatically selected, there is no need to select each target temperature after automatic water stoppage, which is convenient for the user. On the other hand, when the target temperature exceeding the safe temperature is set, the lowest set temperature is automatically selected as described above, and the danger caused by the change in the hot water supply temperature can be avoided.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, water supplied from a water supply channel 1 is provided with a hot water supply means 3 which is heated by a heat exchanger 13 and is supplied through a hot water supply path 2. The hot water supply means 3 comprises a burner 14 The burner 14 is provided with an ignition means 15 and a flame detector 16. The combustion of the burner 14 is performed by a gas supply passage 17.
In response to the supply of fuel from the combustion fan and the supply of combustion air from the combustion fan 18, the combustion control means 5 executes the control by appropriately controlling the fuel supply and the supply of combustion air. The gas supply path 17 is provided with a hot water supply gas solenoid valve 23, a gas flow control valve 24, and a source gas solenoid valve 25.

The water supply path 1 is provided with a water amount sensor 4 which is a hot water supply flow rate measuring means 4 for measuring a water supply amount and a water supply thermistor 19 for measuring a water supply temperature. Hot water supply thermistor 20 for measuring temperature
And an electrically operated water flow control valve 8 with a water stop function. Further, a remote control operation unit 26 for instructing the combustion control means 5 to set or select a plurality of target temperatures and displaying information on a combustion state from the combustion control means 5 is provided separately from the apparatus of the present invention. Is provided.

A single or a plurality of remote control operation units 26 are provided. When a plurality of remote control operation units 26 are provided, the remote control operation unit 26 includes a display unit and a plurality of command operation units as shown in FIG. FIG. 2A shows a kitchen remote controller, which includes a display unit 26a, a setting adjustment switch 26b, a hot water call switch 26c, a setting changeover switch 26d, and an operation switch 26e. The display unit 26a displays a hot water amount, a hot water supply temperature, a combustion display,
A hot water display, a priority display, and the like are displayed. The setting adjustment switch 26b changes the temperature of the hot water supply and the amount of hot water up and down, the hot water call switch 26c starts and stops the hot water operation, and the setting changeover switch 26d operates in the setting mode (hot water temperature, hot water amount). , The operation switch 26e is provided to start the operation of the appliance. FIG. 2B illustrates a bathroom remote controller, which includes a display unit 26h, a temperature control switch 26i, a priority switch 26j, and an operation switch 26k. The display unit 26h displays a hot water supply temperature, a combustion display, a priority display, and the like. The temperature control switch 26i changes the temperature of the hot water supply up and down, the priority switch 26j changes the temperature with priority, and the operation switch 26e is provided to start the operation of the appliance. That is,
The remote control operation unit 26 allows a plurality of target temperatures to be set, and enables hot water supply at any of the target temperatures by selection.

As shown in FIG. 1, the hot water supply path 2 is branched into two or more systems on the downstream side of the water flow control valve 8 with a water stopping function, and the branched hot water supply paths are respectively hot water supply branch paths 6, 7 respectively. And hot water taps 21 and 22 are provided at the outlet. The hot water supply branch 6 is used exclusively for hot water supply to the bathtub 27, and the other hot water supply branch 7 is used for hot water supply other than the bath. In FIG. 1, the hot water supply branch 6 is not provided with a hot water supply flow rate measuring means. However, if both of the hot water supply branches 6 and 7 are used simultaneously, the flow rate of one hot water supply cannot be measured. , A water flow sensor is provided in at least one hot water supply branch, to measure hot water flow,
Alternatively, the flow rate of hot water in the other hot water supply branch may be calculated from the difference in consideration of the measurement information from water flow sensor 4.

The operation of each unit when hot water is supplied to the bathtub 27 using the automatic water stopping function of the apparatus of the present invention will be described below. Details of this operation are shown in FIGS.
, The outline will be described. First, the operation switch 26e is turned on by the kitchen remote control of the remote control operation unit 26, the hot water temperature is selected by the setting changeover switch 26d, and the setting adjustment switch 2
6b to the desired target temperature (preferably 37-48 ° C)
Set. Next, the amount of hot water is selected by the setting changeover switch 26d, and the desired amount of hot water (preferably 10 to 630L) is set by the setting adjustment switch 26b. When the hot water call switch 26c is turned on, hot water supply for hot water is performed under the control described above, and hot water supply is continued until the set integrated flow rate is reached. In addition, hot water tap 2 for hot water
1 must be open, and water flows to the bath tub 27 via the water supply channel 1, the heat exchanger 13, the hot water supply channel 2, and the hot water supply branch channel 6.

At this time, if the hot water supply means 3 is not in operation of hot water other than a bath via the other hot water supply branch 7,
The water amount sensor 4 detects the flow of water, and the combustion control means 5 receives the detection output, rotates the combustion fan 18 and starts the ignition means 15, and at the same time as the spark starts, the combustion starts. The control means 5 opens the hot water supply gas solenoid valve 23 and the original gas solenoid valve 25. A predetermined amount of fuel gas at the time of ignition set by the gas flow control valve 24 is supplied to the burner 14, and when the ignition of the burner 14 is completed, the flame detector 16 detects a flame and the spark Stops. If the hot water supply means 3 is already operating, the ignition operation is not performed. The combustion control means 5 detects a water supply amount and a water supply temperature by the water amount sensor 4 and the water supply thermistor 19 to calculate a required gas amount from a set hot water temperature, and an opening degree of the gas flow control valve 24 and a rotation of the combustion fan 18. Set the number. Thereafter, continuous combustion is started while the opening degree of the gas flow control valve 24 and the rotation speed of the combustion fan 18 are controlled so that the hot water supply thermistor 20 reaches the set hot water temperature. In the case where the set hot water temperature is extremely high, if it is necessary for the combustion control means 5 to respond by limiting the amount of water supply, the water control valve 8 with a water shutoff function provided in the hot water supply path 2 is provided. The water supply amount can be controlled by adjusting the opening degree.

When the accumulated flow rate is reached, the buzzer informs the user for a certain period of time, fully closes the water flow control valve 8 with a water stop function, displays a hot water call, and checks for water leakage from the water flow control valve 8. Make sure there are no leaks and stop hot water supply.
Thereafter, when the user closes the hot water tap 21 and turns off the hot water call switch 26c, a release operation is performed, and when the closed state of the hot water tap 21 is confirmed, the hot water call display is turned off. Then, the hot water setting temperature is compared with the hot water supply setting temperature set before the hot water, and the lower setting temperature is automatically selected, and the lower temperature is displayed on the display units 26a, 26.
6h, and reset to the hot water supply state is performed with the set temperature maintained. This reset enables hot water supply at the set temperature. That is, the hot water supply control means 5 controls so as to automatically select the lowest set temperature from among the set target temperatures at the time of the automatic water stoppage, thereby changing the hot water supply temperature at the time of the automatic water stoppage. The danger caused by can be avoided. When there is a leak from the water amount adjusting valve 8, a failure is displayed and a buzzer is notified for a certain time to stop the operation.

On the other hand, when performing a normal hot water supply operation, the hot water supply temperature can be selected by the setting changeover switch 26d of the kitchen remote controller, and a desired target temperature can be set by the setting adjustment switch 26b. After pressing the priority switch 26j of the bathroom remote controller, a desired target temperature can be set by the temperature adjustment switch 26i. The control of the hot water supply is the same as in the above case.

By using the automatic water stopping function of the apparatus of the present invention, the bathtub 27
Other than the above, an automatic water stoppage water supply in which hot water of a predetermined target temperature is discharged by a target water supply amount and the water is automatically stopped is also possible. This function makes it possible to easily supply hot water for a single basin or to supply a designated amount of hot water to a washing machine, for example.

(Another Embodiment) Another embodiment will be described below.

(1) In the above embodiment, when the water supplied from the water supply channel is heated by the hot water supply means and discharged through the hot water supply channel, the heated water is not mixed and supplied from the water supply channel. Although an example is shown, the hot water supply means may be configured to mix and supply the water supplied from the water supply channel to the hot water supply channel and adjust the temperature after mixing. In this case, the hot water tap may be configured as a mixing tap, or the mixed hot water supply may be performed further immediately after the hot water supply path or heating.
According to the above configuration, water can be mixed and supplied regardless of the temperature of hot water in the hot water supply path after heating, and the temperature after mixing can be adjusted. Therefore, heating before mixing can be performed under advantageous conditions and the like. Further, when the hot water tap is configured as a mixing tap, the temperature of the hot water can be easily changed particularly during hot water supply, which is convenient for the user.

(2) In the above embodiment, regardless of the set temperature, the hot water supply control means controls the automatic selection of the lowest set temperature among the set target temperatures at the time of automatic water stoppage. However, the hot water supply control means compares a predetermined safety temperature with a plurality of target temperatures, and if a target temperature exceeding the safe temperature is not set, the hot water supply is performed at the time of the automatic water stoppage. It may be configured to control so as to automatically select the previous set target temperature.
In this case, the safe temperature may be set in advance by hardware, or may be set by an external command input. The above control is performed, for example, according to a flowchart shown in FIG. According to such a configuration, when the target temperature exceeding the safe temperature is not set, there is no need to avoid the danger caused by the change of the hot water supply temperature. It is not necessary to select the target temperature one by one later, which is convenient for the user. On the other hand, when the target temperature exceeding the safe temperature is set, the lowest set temperature is automatically selected, and the danger caused by the change in the hot water supply temperature can be avoided.

(3) In the above embodiment, an example in which two types of target temperatures can be set has been described. However, a configuration may be adopted in which a plurality of target temperatures can be set.

(4) In the above embodiment, the hot water supply path 2 is connected to the hot water supply branch paths 6 and 7 which are branched into two systems on the downstream side of the hot water supply thermistor 20. The number is not limited to two and may be three or more.

(5) In the above embodiment, an example was shown in which the hot water supply means heats using the combustion heat of gas. However, the hot water supply means may be configured to be able to heat using other energy such as electricity. Good.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a hot water supply device with an automatic water stop function.

FIG. 2 is a diagram showing a remote control operation unit of the water heater.
(B) Remote control for kitchen, (b) Remote control for bathroom

FIG. 3 is a diagram showing a control flow chart at the time of hot water supply of the water heater.

FIG. 4 is a diagram showing a control flow chart at the time of hot water supply of the hot water supply device.

FIG. 5 is a diagram showing a control flow chart at the time of hot water of a hot water supply device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water supply path 2 Hot water supply path 3 Hot water supply means 4 Hot water supply flow rate measuring means 5 Hot water supply control means 8 Water stop means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-142952 (JP, A) JP-A-5-126398 (JP, A) JP-A-63-198954 (JP, U) (58) Survey Field (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (4)

(57) [Claims] 1. Hot water supply means for heating water supplied from a water supply path to discharge hot water through the hot water supply path, hot water supply flow rate measuring means provided in the water supply path or the hot water supply path, and the water supply path or the hot water supply The hot water supply means is capable of automatically stopping hot water supply by discharging hot water at a target temperature by a target total hot water supply amount based on measurement information from the hot water supply means provided on the road and measurement information from the hot water supply flow rate measurement means and an external command input. A hot water supply control means for controlling a hot water supply combustion operation of the hot water supply means and a water stoppage operation of the water stoppage means, and an automatic water stop function in which the hot water supply path is branched into two or more systems on the downstream side. A hot water supply apparatus, wherein the hot water supply path is provided with two systems at a downstream side of the water stopping means.
The hot water supply control means allows the hot water to be supplied at any one of the target temperatures while allowing a plurality of target temperatures to be set, and sets the target at the time of the automatic water stoppage. A water heater with an automatic water shutoff function that controls to automatically select the one with the lowest set temperature among the temperatures. 2. The hot water supply apparatus with an automatic water shutoff function according to claim 1, wherein at least one of the branched hot water supply paths is a hot water supply path for a bathtub. 3. The automatic stop according to claim 1, wherein said hot water supply means mixes and supplies water supplied from said water supply path to said hot water supply path to adjust the temperature after mixing. Water heater with water function. 4. The hot water supply control means compares a predetermined safe temperature with a plurality of the target temperatures, and if a target temperature exceeding the safe temperature is not set, the automatic hot water supply before the hot water supply is stopped. The hot water supply device with an automatic water stop function according to any one of claims 1 to 3, wherein the hot water supply device is controlled to automatically select a set target temperature.