JP2003004301A - Hot-water storage-type electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption in a hot-water storage-type water heater. SOLUTION: A low-temperature tank T1 and a high-temperature tank T2 are connected in series through a connecting pipe 6. The tank T1 and the tank T2 are provided with hot-water outlets 5 and 9, respectively, and an inlet 3 of the tank T1 is connected with a feed water pipe 1. Heat of the tank T1 is set at 60 deg.C, for instance, and heat of the tank T2 is set at 90 deg.C, for instance. The capacity of the tank T2 for a high temperature is set at a smaller value than that of the tank T1 for a low temperature. Since only a portion of the entire storage of hot water is kept at a high temperature, the time required for boiling can be shortened, and the power consumption rate for boiling and reserving heat can be reduced. Further, since the high-temperature hot water is not consumed when using the low-temperature warm water, the high- temperature hot water can be reserved. When all the high-temperature hot water has been consumed, the warm water in the tank T1 is supplied, and thus the time required for boiling is shortened. The tank T1 may be made of synthetic resin.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hot water storage type electric water heater capable of discharging hot water of different temperatures.

[0002]

2. Description of the Related Art Generally, a hot water storage type electric water heater is constructed so that water stored in a hot water tank is heated to a predetermined temperature by a heater and then the hot water is kept at a preset temperature by a function of a thermostat or the like. The hot water discharge temperature is set to a relatively high temperature, and when low-temperature hot water is required, the water is mixed by a hot and cold water mixing tap or the like.

[0003]

There are various uses of hot water, such as washing, washing, drinking, cooking, etc., in addition to supplying hot water to a bathtub, and hot water is not always required.
Nevertheless, in the conventional hot water storage type electric water heater, it is normal to keep the entire hot water tank at the highest temperature side of the predicted required temperature. Therefore, there is a possibility that hot water with a capacity larger than that actually required is kept warm at high temperature, and the amount of heat released from the hot water tank is also large, so the amount of electricity consumed to maintain the temperature is extremely high. .

Further, when the hot water in the hot water tank is used up, the whole hot water tank is boiled from the water, so that there is a drawback that it takes time until the hot water can be used.

[0005]

The feature of the hot water storage type electric water heater adopted by the present invention in order to solve the above-mentioned conventional problems is that it is for high temperature and low temperature which are set to different temperatures. Two hot water tanks are connected, both tanks are connected in series such that the low temperature tank is on the upstream side and the high temperature tank is on the downstream side. The hot water is supplied to the high temperature tank and the hot water is supplied to the high temperature tank from the low temperature tank.

In the hot water storage type electric water heater according to the present invention constructed as described above, the hot water tank is divided into a high temperature tank and a low temperature tank, so that relatively low temperature hot water can be immediately obtained without mixing water or the like. You can Further, since the capacity of the high temperature tank can be made smaller than that of the conventional hot water tank, it is possible to reduce the power consumption required for boiling to a predetermined temperature and maintaining the temperature. Since the hot water is supplied from the low temperature tank to the high temperature tank, when the hot water in the high temperature tank is used up, the time required to boil until the hot water can be used again becomes shorter. .

In the hot water storage type electric water heater, a structure may be adopted in which the low temperature tank and the high temperature tank have different tank capacities.

The present invention provides a hot water storage type electric water heater in a different form. The feature of the present invention is that the inside of the hot water tank is divided into two regions by partition walls, and the heat retaining means and the hot water are provided in each region. And one of the regions is a low temperature region including the water supply unit and having a low heat retention temperature, and the other region is a high temperature region having a high heat retention temperature, and the high temperature region is formed on the partition wall. The hot water is supplied from the low temperature region through the communication hole. With such a configuration, it is possible to exhibit the same function as that of the hot water storage type electric water heater.

Further, even in the hot water storage type electric water heater adopting the above-mentioned aspect, it is possible to adopt a constitution in which the capacities of the low temperature region and the high temperature region of the hot water tank are different.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 illustrates a first embodiment of the present invention. The hot water storage type electric water heater A of this example is provided with two hot water tanks T1 and T2, and a connecting pipe 6 branched from a hot water pipe 5 connected to an outlet 4 of one hot water tank T1 is connected to the other hot water tank. Inlet 7 of T2
By connecting to the two hot water tanks T1, T
2 are connected in series, and the hot water tank T1 on the downstream side is connected.
Is set for low temperature, and the hot water tank T2 on the upstream side is set for high temperature. A water supply pipe 1 for supplying water from a water supply source is connected to the inflow port 3 of the low temperature tank T1, and a pressure reducing valve 2 is arranged in the middle of the water supply pipe 1. A hot water outlet pipe 9 for sending hot water is connected to the outlet 8 of the high temperature tank T2.

Each of the two hot water tanks T1 and T2 is provided with a heater H, a temperature controller 20 such as a thermostat, and a heat preventive device 21 composed of a bimetal, a temperature fuse and the like. Is heated to a predetermined temperature and then maintained at the set temperature. In the low temperature tank T1, the heat retention temperature is set to, for example, 60 ° C, and in the high temperature tank T2, the heat retention temperature is set to, for example, 90 ° C.

Further, in this example, the high temperature tank T2
Is set smaller than the capacity of the low temperature tank T1. This is because it is generally considered that low-temperature hot water may be continuously used in large amounts, whereas high-temperature hot water is rarely used in continuous large amounts. . However, it is possible that the amount of hot water used is large, depending on the actual usage. In such a case, the capacity of the high temperature tank T2 may be set to be equal to or larger than the capacity of the low temperature tank T1.

Hot water storage type electric water heater A constructed as described above
Since only a part of the total amount of stored hot water is maintained at a high temperature, it is possible to shorten the time required to boil up to a predetermined temperature, as compared with the conventional example in which the entire hot water tank is maintained at a high temperature, It is possible to suppress the power consumption required for boiling and keeping warm. Hot water and low temperature hot water,
The hot water in the low temperature tank T1 is consumed and the hot water in the high temperature tank T2 is not consumed when only low temperature hot water is used. Therefore, ensure high temperature hot water. You can When the hot water in the high temperature tank T2 has been used up, the high temperature tank T
Since the hot water in the low temperature tank T1 is supplied to 2, the time required for boiling is shortened, and the time until the hot water can be reused is shortened. Further, since the two hot water tanks T1 and T2 are connected in series and only one connection portion with the water supply pipe 1 is provided, the water supply pipe is simple and only one pressure reducing valve 2 is required. Furthermore, the low temperature tank T1
Since it is not required to withstand high temperatures, a low temperature but low cost synthetic resin material can be used as the material of the low temperature tank T1.

[Second Embodiment] FIG. 2 shows a second embodiment of the present invention.
The hot water storage type electric water heater B which concerns on embodiment of FIG. In this hot water storage type electric water heater B, one hot water tank T3 is vertically divided by a partition wall 10 to provide two regions S1 and S2, and a region S1 including a lower water supply port 11 is a low temperature region and an upper region. The area S2 is set to a high temperature area. The partition wall 10 has a communication hole 10a and extends from the low temperature region S1 to the high temperature region S2.
It is configured to allow warm water to flow into.

The low temperature region S1 has an inflow port 11 at the bottom, a water supply pipe 1 for supplying water from a water supply source is connected, and a pressure reducing valve 2 is arranged in the middle of the water supply pipe 1. Further, a hot water outlet pipe 13 for sending low-temperature hot water is connected to the outlet 12 provided in the upper part of the low-temperature region S1. On the other hand, in the high temperature region S2, a hot water outlet pipe 15 for delivering high temperature hot water is connected to the outlet 14 of the ceiling portion. Furthermore, the two areas S1 and S2 are respectively the heater H, the temperature controller 20, and
A heating protector 21 is provided, and by these functions, it is configured to boil the stored water to a predetermined temperature and then maintain the set temperature. The heat retention temperature in the low temperature region S1 is, for example, 60 ° C., and the heat retention temperature in the high temperature region S2 is, for example, 90 °.
Set to C.

Further, in this example, the capacity of the high temperature region S2 is set smaller than the capacity of the low temperature region S1 in accordance with the generally considered usage mode. There is no obstacle to setting the capacity of the region S2 to be equal to or higher than the capacity of the low temperature region S1.

The hot water storage type electric water heater B of this embodiment also has the same function as that of FIG. That is, since only a part of the total amount of stored hot water is maintained at a high temperature, compared to the conventional example, the time required to boil up to a predetermined temperature can be shortened, and the power required for boiling and heat retention can be reduced. It is possible to reduce the consumption. The low-temperature region S1 for supplying low-temperature hot water and the high-temperature region S2 for supplying high-temperature hot water are partitioned by the partition wall 10. Therefore, when only low-temperature hot water is used, the hot water in the low-temperature region S1 is consumed, High-temperature hot water can be secured in S2. When the hot water in the high temperature region S2 is used up, hot water is supplied from the low temperature region S1 to the high temperature region S2 through the communication hole 10a of the partition wall 10, so the time required for boiling is shortened,
It takes less time before hot water can be used again.

[0018]

The hot water storage type electric water heater according to the present invention exhibits the following excellent effects. Since it is configured so that only a part of the total amount of stored hot water is maintained at high temperature, the time required to boil up to a predetermined temperature is shortened and the power consumption required for boiling and heat retention is reduced. You can save money. Since the hot water storage region and the low temperature hot water storage region are separately configured, the high temperature hot water is not consumed when only the low temperature hot water is used. Therefore, even after using a large amount of low temperature hot water, it is possible to use high temperature hot water. When the hot water is used up, the low-temperature hot water is supplied to the hot-water storage area, so the time to boil it to the high-temperature hot water is shortened, and the high-temperature hot water can be used again. Time to get faster.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an electric water heater according to the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of an electric water heater according to the present invention.

[Explanation of symbols]

1 ... Water supply pipe 2 ... Pressure reducing valve 3 ... Inflow port 4 ... Outflow port 5
… Hot water pipe 6… Communication pipe 7… Inflow port 8… Outflow port 9… Hot water pipe 10… Partition wall 1
0a ... Communication hole 11 ... Inflow port 12 ... Outflow port 13 ... Outflow pipe 14 ... Outflow port 15 ... Outflow pipe 20 ... Temperature controller 21 ... Overheat protector A, B ... Hot water storage electric water heater H ...
Heater S1 ... Low temperature area S2 ... High temperature area T1 ... Low temperature tank T2 ... High temperature tank T3 ... Hot water tank

Claims (4)

[Claims] 1. A hot water tank for high temperature and a hot water tank for low temperature, which are set to have different heat retaining temperatures, are provided, and both tanks are connected in series so that the low temperature tank is on the upstream side and the high temperature tank is on the downstream side. In addition, each tank is equipped with a hot water outlet to supply water from the water supply source to the low temperature tank and to the high temperature tank from the low temperature tank to store hot water. Water heater. 2. The hot water storage type electric water heater according to claim 1, wherein the low temperature tank and the high temperature tank have different tank capacities. 3. A hot water tank is divided into two regions by partition walls, a heat retaining means and a hot water outlet are provided in each region, and one region is a low temperature region in which the heat retaining temperature is set low including a water supply unit. In addition, the other region is a high temperature region in which the heat retention temperature is set high, and the high temperature region is configured so that hot water is supplied from the low temperature region through the communication hole formed in the partition wall. Electric water heater. 4. The hot water storage type electric water heater according to claim 3, wherein the hot water tank has different capacities in a low temperature region and a high temperature region.