JPH05264097A - Electric water warming apparatus with bath hot water leveling function - Google Patents

Abstract

PURPOSE:To allow at least bathing by leveling hot water up to a lowest level capable of bathing even when hot water of a hot water storage tank is out. CONSTITUTION:When a water level sensor 17 detects a lowest level capable of bathing if a bath thermistor 16 detects lack of hot water on the way of supplying hot water to a bathtub 10, supplying of the hot water to the bathtub 10 is stopped. When the sensor 17 detects a lowest level capable of bathing, supply of the hot water to the bathtub 10 is continued as it is until the sensor 17 detects the lowest level capable of bathing. Further, a bath temperature keeping function is conducted by a bath temperature keeping heater 21 so as to be capable of bathing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater having a bath filling function for filling a bathtub.

[0002]

2. Description of the Related Art In the conventional electric water heater with a bath water filling function shown in FIG. 2, generally, hot water in a hot water storage tank 1 boiled with low-price midnight power is mixed with water in a hot water mixing section 2. While detecting the mixed hot water temperature with the bath thermistor 3, the bath is filled with the temperature set by the control unit 4 and the water level dropped by the water level sensor 6 at the water level set by the control unit 4 at the water level set by the control unit 4. Becomes Hot water storage tank 1 during this filling
When the hot water runs out, the bath thermistor 3 immediately detects it and stops filling the water. In addition, after the filling of the hot water is completed, the hot water in the bathtub 5 is circulated by the circulation pump 7 at a certain time interval in order to keep the temperature drop of the hot water due to the heat radiation of the hot water in the bathtub until the bathing at a set temperature. To detect the temperature with
If the detected temperature is lower than the set temperature, the reheating heater 8 installed in the circulation path formed by the pouring pipe 9 and the circulation pump 7 is energized to boil up to the set temperature to keep the hot water in the bathtub 5 warm. Was there.

[0003]

However, in the conventional structure as described above, when the hot water in the hot water storage tank 1 is exhausted during filling the hot water, the bath thermistor 3 immediately detects and stops the hot water filling. When the amount of remaining hot water in the tank 1 was small, the water level in the bathtub 5 was low, and there was an inconvenience that the bath could not be taken when it was time to take a bath.

The present invention solves the above-mentioned conventional problems, and it is an object of the present invention to fill the hot water to the lowest water level that can be taken even when the hot water in the hot water storage tank is exhausted so that at least the hot water can be taken.

[0005]

In order to solve the above problems, an electric water heater with a bath filling function according to the present invention, when a bath thermistor detects running out of water while filling a bathtub, the water level sensor is When the minimum water level that can be bathed is detected or higher, the dropping into the bathtub is stopped. Conversely, when the water level sensor detects the minimum water level that can be bathed or lower, the bathtub is stopped until the minimum water level that can be bathed is detected. The controller has a control unit for continuing the refilling to the above and further recharging with a reheating heater.

[0006]

According to the present invention, even if the hot water storage tank runs out of water while the bathtub is being filled with water, the hot water is refilled to the lowest water level that can be bathed and heated by the reheating heater. You can take a bath.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an electric water heater with a bath hot water filling function. 10 is a bathtub, 11 is a hot water storage tank, and 12 is a hot water storage tank 1.
A boiling heater for boiling water in 1; 13 is a hot and cold water mixing section for mixing hot water in the hot water storage tank 11 and water from another route to a set temperature; 14 is a check valve for preventing backflow from the bath 10; Is a pouring pipe for dropping the hot water mixed in the hot and cold water mixing unit 13 into the bathtub 10, 16 is a bath thermistor for detecting the temperature of the mixed hot water, 17 is a water level sensor for detecting the water level of the bathtub 1,
8 is a circulation pipe provided to circulate the hot water in the bathtub 10, 19 is a check valve for preventing flow from the pouring pipe 15 into the circulation pipe 18, 20 is a circulation pump for forcibly circulating the hot water in the bathtub 10, Reference numeral 21 is a reheating heater that reheats the hot water in the bathtub 10, and 22 is a control unit that fills the bathtub 10 with water and keeps the temperature at a preset temperature.

The operation of the above configuration will be described. The midnight power in the low-price midnight time (generally from 11:00 pm to 7:00 am) is supplied to the boiling heater 12 to boil the water in the hot water storage tank 11 to a set temperature and store the hot water. And
When filling the bathtub 10 with water for bathing, the hot and cold water mixing section 1
In 3, mix the hot water in the hot water storage tank 11 with the water from another route,
The mixing ratio of hot water and water is adjusted so that the temperature detected by the bath thermistor 16 becomes the set temperature for filling water. The mixed hot water that has reached the set temperature is dropped into the bathtub 10 from the pouring pipe 15, and when the water level of the bathtub 10 detected by the water level sensor 17 reaches the set water level, the dropping into the bathtub 10 is stopped and the hot water filling is performed. Complete.

In the course of filling water, when the temperature detected by the bath thermistor 16 becomes lower than the set temperature for filling water and the temperature does not reach the set temperature even if the hot water mixing section 13 is adjusted, the hot water in the hot water storage tank 11 is exhausted. to decide. Then, at this time, when the water level sensor 17 detects the minimum water level above which bathing is possible, the dropping into the bathtub 10 is stopped, the filling of water is completed, and the operation proceeds to the heat retention operation.

When it is judged that there is no hot water, the water level sensor 17
Bathtub 1 is detected when the water level is below the minimum water level
The dropping to 0 is continued as it is, and the dropping is stopped when the water level sensor 17 detects the minimum water level at which bathing is possible. At this time, the hot water temperature in the bathtub 10 becomes lower than the hot water filling temperature, so that additional heating is performed. For reheating, the hot water in the bathtub 10 is circulated from the circulation pipe 18 to the circulation pump 20, the check valve 19, the pouring pipe 1
5, forcedly circulates into the bathtub 10 and the bath thermistor 16
While the hot water temperature of the bathtub 10 is being detected, the reheating heater 21 is energized to reheat to the set temperature of the water filling, and when the water filling temperature is reached, the water filling is completed and the heat retaining operation is started.

The warming operation is performed in order to prevent the temperature of the hot water in the bathtub 10 from decreasing until the bath is actually taken, and the operation is the same as the reheating operation described above, and has a certain predetermined value. Hot water in the bathtub 10 is forcibly circulated from the circulation pipe 18 to the circulation pump 20, the check valve 19, the pouring pipe 15, and the bathtub 10 at time intervals, and the bath thermistor 16 detects the temperature of the bathtub 10. Then, when the detected temperature is lower than the water filling setting temperature, the reheating heater 21 is energized to boil up to the water filling setting temperature. In this way, it is possible to bathe by filling water and keeping warm.

[0012]

As described above, according to the present invention, when the bath thermistor detects running out of water while filling the bathtub, and when the water level sensor detects the minimum water level above which bathing is possible, the bathtub When the water level sensor detects the water level below the minimum water level that can be bathed, on the other hand, the water level sensor continues to drop the bath until the minimum water level that can be bathed is detected, and then the reheating heater. If you run out of water in the hot water tank while filling the bathtub, the water can be filled up to the lowest water level, so you can bathe and not bathe. No inconvenience occurs.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electric water heater with a bath filling function according to an embodiment of the present invention.

[Fig. 2] Configuration diagram of a conventional electric water heater with bath hot water filling function

[Explanation of symbols]

 10 Bathtub 11 Hot Water Storage Tank 13 Hot Water Mixing Section 15 Pouring Pipe 16 Bath Thermistor 17 Water Level Sensor 18 Circulation Pipe 20 Circulation Pump 21 Reheating Heater 22 Control Section

Claims (1)

[Claims] 1. A hot water storage tank having a boiling heater therein, a hot and cold water mixing section for mixing the hot water in the hot water storage tank and water from a different route to a set temperature, and a mixed hot water mixed in the hot and cold water mixing section. , A bath thermistor for detecting the temperature of the mixed hot water mixed in the hot and cold water mixing section, a water level sensor for detecting the water level in the bath, and a circulation provided for circulating the hot water in the bath. A pipe and a circulation pump, a reheating heater for reheating the hot water in the bathtub, a filling of water in the bathtub, and a control unit for controlling the hot water in the bathtub, wherein the control unit is the bathtub. When the bath thermistor detects running out of water while filling the bath with water, and when the water level sensor detects a minimum water level above which bathing is possible, the water level sensor stops bathing and the water level sensor can bathe. Below the minimum water level It continued, and the bath hot water filling function electric water heater that is configured to reheating the bathtub water in the reheating heater to darken to the bath until it detects the lowest level possible bathing time that.