JPH06323627A - Hot water feeding system - Google Patents

Abstract

PURPOSE:To provide a hot water feeding system in which hot water storing tanks are distributively arranged at each of locations requiring the hot water feeding, and an electrical power-contract at a low charging fee rank is allowed by an electrical hot water heater without having any relation with the number of hot water storing tanks. CONSTITUTION:Hot water storing tanks 2, 3, 4, provided with electrical heaters 11, 21 and 31 are arranged near each of a plurality of locations requiring hot water feeding, these electrical heaters are controlled for their electrical energization by a controller 4, and electrical energization for a pluralifz of electrical heaters is not carried out. With such an arrangement as montioned above, the electrical power-contract is allowed to make sufficient based on a charging rank adapted for the electrical heater of the maximum capacity in these tanks without having any relation with the number of the hot water storing tanks to be installed.

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 system installed in a general house or the like.

[0002]

2. Description of the Related Art As a hot water supply system for a house or the like, one hot water storage type electric water heater is arranged, and hot water is supplied from a hot water storage tank of the water heater to a place where hot water supply such as a kitchen, a washroom or a bathroom is required. Generally, the method of guiding by piping is widely used.

However, according to such a hot water supply system, when hot water is used, low-temperature water is often accumulated in the pipe from the electric water heater to each hot water supply location, and the hot water supply faucet is opened. However, there was a problem that hot water did not come out immediately.

Therefore, recently, only hot water storage tanks are arranged near hot water supply places such as kitchens, bathrooms, and washrooms, and hot water is supplied from one heating device to each hot water storage tank. The hot water supply system of the method to do is proposed.

[0005]

By the way, according to the hot water supply system in which the hot water storage tanks are dispersed and arranged, for example, even when a large amount of hot water is used in the bathroom, the hot water is used in the kitchen or the washroom. This is an efficient hot water supply system that does not run out, but it is necessary to increase the capacity of the electric heater of the heating device when increasing the number of hot water supply locations (the number of hot water storage tanks). There is an economic problem such that the power contract fee (midnight power) becomes higher in rank.

The present invention has been made in view of the above circumstances, and is irrespective of the number of hot water storage tanks to be dispersed and arranged.
The intended purpose is to provide a hot water supply system using an electric water heater that can be contracted for electricity at a low charge rank.

[0007]

A structure for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. A hot water supply system according to the present invention can be applied to a plurality of places requiring hot water supply. Hot water storage tanks 1 located near each
2, 3 and electric heaters 11, 21 and 31 and temperature sensors TH ₁ , TH ₂ and TH ₃ attached to the respective tanks,
A control unit 4 is provided which controls the energization of each of the electric heaters based on the output of each of the temperature sensors.
Only the electric heater of any one of the hot water storage tanks 1, 2 and 3 is selectively energized, and the value detected by the temperature sensor of the electric heater during energization is a preset value (boiling temperature setting). It is characterized by being configured to sequentially switch the energization to other electric heaters when the value is reached.

[0008]

The controller 4 does not energize the electric heaters 11 ... 31 of the tanks 1 ... 3 at the same time. Therefore, even if the number of hot water storage tanks is increased, the electric power contracts will not be applied to those tanks. Of these, the charge rank is suitable for one electric heater with the maximum capacity.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an embodiment of the present invention in which a piping system diagram and a block diagram of a control system are shown together.

First, the entire hot water supply system is composed of three hot water storage tanks 1, 2, 3 and electric heaters 11, 21, 31 and a remote controller 4 mounted at the bottom of each tank.

The three hot water storage tanks 1, 2 and 3 are hermetically sealed tanks having water supply ports 1a ... 3a at the bottom and hot water outlets 1b ... 3b at the top. 1 is located near the bathroom. The hot water storage tank 2 is arranged near the kitchen, and the hot water storage tank 3 is arranged near the washroom. The hot water storage capacity of each tank is, for example, 200 liters for the tank 1 for the bathroom and 2 for the kitchen.
100 liters, the washroom tank 3 is 50 liters, and the capacity of the electric heaters 21, 21, 31 of each tank is
All of them have the same capacity (for example, 4.4 KW) in accordance with the electric heater 11 of the bathroom tank, which is the maximum capacity.

Further, the water supply ports 1a, 2a of the hot water storage tanks,
3a are connected in parallel to each other by a single water supply pipe 5. In addition, at the top of each hot water storage tank,
Air vent valves 1c, 2c, 3c are arranged to communicate with the respective outlets 1b, 2b, 3b. A pressure reducing valve (with a relief valve) 5a is connected to the water supply pipe 5.

Further, in each of the hot water storage tanks 1, 2 and 3, temperature sensors TH ₁ , TH ₂ and TH ₃ are arranged in the vicinity of the respective heaters, and the outputs of these sensors are incorporated in the remote controller 4. Be done.

The remote controller 4 includes a preset boiling temperature setting value and temperature sensors TH ₁ , TH ₂ , TH ₃
The peak shift is calculated based on the detected water temperature value, etc., and based on the calculation result, the energization start / stop of each electric heater 11, 21, 31 of each hot water storage tank is controlled by the operation described later. Has been done. However, the controller 4 does not energize the two electric heaters at the same time.

Next, the operation of the embodiment of the present invention will be described together with the boiling operation by the remote controller 4. First, the controller 4 sets the boiling temperature set value of each hot water storage tank 1, 2, 3 and its temperature sensor TH ₁ , TH ₂ ,
The peak shift calculation is performed based on the water temperature detection value by TH _3, etc., but the three electric heaters 11, 21, 3
Since 1 is not energized at the same time, the peak shift calculation method for each of these hot water storage tanks is different.

As the calculation method, for example, first, a peak shift calculation is performed for the hot water storage tank 1 for the bathroom, and the time to start energizing the electric heater 11 of this tank is determined. At this time, the reference time of back calculation in the peak shift calculation, that is, the time of completion of the boiling operation is the midnight power end time:
It is 7:00 am. Next, the peak shift calculation for the hot water storage tank 2 for the kitchen is performed. The reference time for the back calculation at this time is the energization start time of the previous electric heater 11, and the peak shift calculation for the hot water storage tank 2 for the washroom is performed. Has
A method is adopted in which the energization start time obtained for the kitchen hot water storage tank 2 is used as a reference time for back calculation.

After the start time of the midnight power, the controller 4 first energizes the electric heater 31 of the hot water tank for the washroom based on the calculation results of the peak shift calculation described above. When the temperature detection value by the temperature sensor TH ₃ of the hot water storage tank reaches the boiling temperature set value, the heater 31 is de-energized, and thereafter, by the same operation, the electric heater 21 of the kitchen hot water storage tank
The electricity is turned on / off and the electric heater 1 of the hot water storage tank for the bathroom is turned on / off sequentially.

The priority order of the boiling operation of the three hot water storage tanks 1, 2, 3 is not limited to the above order, and may be appropriately changed according to the usage preference of the hot water.
In addition, in the above embodiment, the kitchen, bathroom, and washroom
An example of arranging hot water storage tanks (with heaters) at hot water supply locations has been described, but the hot water storage tanks are not limited to this, and hot water storage tanks may be placed at other hot water supply locations such as a laundry place. The present invention can be applied to the case of constructing a hot water supply system.

[0019]

As described above, according to the hot water supply system of the present invention, the hot water storage tank equipped with the electric heater is
It is arranged near each of a plurality of places where hot water is needed, and the electric heaters of these electric heaters are controlled by a controller so that two or more electric heaters are not energized at the same time. Even if the number of hot water storage tanks to be installed in is increased, the electric power contract does not depend on the number of hot water storage tanks, and the result is that the charge rank is compatible with one electric heater with the maximum capacity of those tanks. However, the financial burden on the running cost will not increase.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, showing a piping system diagram and a block diagram of a control system together.

[Explanation of symbols]

1,2,3 ・ ・ ・ ・ Hot water storage tank 11,21,31 ・ ・ ・ ・ Electric heater TH ₁ , TH ₂ , TH ₃・ ・ ・ ・ Temperature sensor 4 ・ ・ ・ ・ ・ ・ Remote controller

Claims (1)

[Claims] 1. A hot water storage tank arranged in the vicinity of each of a plurality of places requiring hot water supply, an electric heater and a temperature sensor mounted in each tank, and the above based on the output of each temperature sensor. The electric heater is provided with a control unit that controls energization of the electric heater. The control unit selectively energizes only one of the electric heaters of the hot water storage tanks, and the electric heaters that are energized as described above. A hot water supply system configured to sequentially switch energization to other electric heaters when the value detected by the temperature sensor reaches a preset value.