JPH0933105A - Hot water boiler hot water supply system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a hot water boiler hot water supply system capable of supplying hot water in a short time after operating the hot water boiler. A hot water boiler 1 equipped with a heat exchanger 3 is provided with a hot water storage tank 6 for storing hot water, and the hot water storage tank 6 and the inlet 3a of the heat exchanger 3 are connected by a water supply line 8 equipped with a water supply pump 7. At the same time, the outlet 3b of the heat exchanger 3 and the hot water supply outlet 9 are connected by a hot water supply line 12 equipped with a hot water supply pump 10 and a flow rate sensor 11, and between a predetermined portion of the hot water supply line 12 and the hot water storage tank 6. Are connected by a hot water circulation passage 14 provided with a check valve 13 and a hot water supply passage 17 provided with a check valve 15 and a solenoid valve 16, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water boiler hot water supply system having a hot water boiler equipped with a hot water storage tank for storing hot water.

[0002]

2. Description of the Related Art When hot water that has been heat-exchanged from a hot water boiler equipped with a heat exchanger is directly supplied to the load side, it is difficult to cope with a sudden load change on the load side. There is a hot water supply system for a hot water boiler having a configuration in which a tank 36 is provided. The hot water supply system shown in FIG.
And a heat exchanger 33 for exchanging heat between the heating fluid supplied from the boiler can body 32 and the fluid to be heated on the load side, and a circulation for circulating the heating fluid between the boiler can body 32 and the heat exchanger 33. A hot water boiler 31 configured to connect a circulation line 35 having a pump 34, and a hot water circulation pump 3 for circulating a fluid to be heated between the heat exchanger 33 and the hot water storage tank 36.
A hot water circulation line 38 equipped with 7 is provided. On the other hand, a hot water supply line 40 having a hot water supply pump 39 for supplying the hot water in the hot water storage tank 36 to the load side is connected to the upper part of the hot water storage tank 36, and a hot water supply outlet 41 is provided at the tip. The hot water supply line 40 is provided with a flow rate sensor 42, which detects the hot water supply from the hot water supply outlet 41, and a controller 43.
The hot water supply pump 39 is driven via the air conditioner and is stopped when the hot water supply is stopped. Further, the hot water storage tank 36 is provided with a temperature sensor 44 so that hot water having a predetermined temperature is stored in the hot water storage tank 36 through a predetermined temperature boundary layer. Reference numeral 45 is a water supply tank, and reference numeral 46 is a makeup water line.

In the hot water boiler hot water supply system having the above-mentioned structure, hot water cannot be supplied unless a certain amount of hot water is stored in the hot water storage tank 36. Therefore, there is a long waiting time from when the hot water boiler 31 is operated until hot water can be supplied, which is a problem in an emergency.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a hot water boiler hot water supply system capable of supplying hot water in a short time after operating the hot water boiler. Is.

[0005]

The present invention has been made to solve the above problems, and a hot water boiler equipped with a heat exchanger is provided with a hot water storage tank for storing hot water. The inlet of the exchanger is connected by a water supply line equipped with a water supply pump, and the outlet of the heat exchanger and the hot water supply outlet are connected by a hot water supply line equipped with a hot water supply pump and a flow rate sensor. It is characterized in that a hot water circulation path having a check valve and a hot water supply path having a check valve and a solenoid valve are connected between the location and the hot water storage tank.

[0006]

According to the present invention, the electromagnetic valve in the hot water supply passage is closed during the initial operation, and when the heating fluid in the hot water boiler reaches a predetermined temperature, the water supply pump in the water supply line is driven to heat the fluid to be heated which has undergone heat exchange in the heat exchanger. Hot water is directly supplied to the load side, and if the load decreases, hot water flows into the hot water storage tank through the hot water circulation path, and the heated fluid in the hot water storage tank is circulated to store a predetermined amount of hot water at a predetermined temperature. When the load suddenly increases, the solenoid valve is opened to supply the hot water in the hot water storage tank.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic explanatory view showing the overall configuration of a hot water supply system for a hot water boiler embodying the present invention.

In FIG. 1, a boiler can 2, a heat exchanger 3 for exchanging heat between a heating fluid (can water) supplied from the boiler can 2, and a fluid to be heated on the load side, the boiler can 2, and the above A hot water boiler 1 having a structure in which a circulation line 5 having a circulation pump 4 for circulating a heating fluid is connected between the heat exchanger 3 and the heat exchanger 3.
A hot water storage tank 6 for storing hot water of the fluid to be heated is provided. The lower part of the hot water storage tank 6 and the inlet 3 of the heat exchanger 3
a is connected by a water supply line 8 equipped with a water supply pump 7, and the outlet 3b of the heat exchanger 3 and a hot water supply outlet 9 are connected by a hot water supply pump 10 and a hot water supply line 12 equipped with a flow rate sensor 11, A hot water circulation passage 1 provided with a check valve 13 at a predetermined portion of the hot water supply line 12 and an upper portion of the hot water storage tank 6.
4, and a hot water supply passage 17 including a check valve 15 and a solenoid valve 16
Are connected with each other.

A temperature sensor 18 is provided in the hot water storage tank 6.
a, 18b, and 18c are provided so that hot water of a predetermined temperature is stored in the hot water storage tank 6 through a predetermined temperature boundary layer. Reference numeral 19 is a controller which connects the water supply pump 7, the temperature sensors 18a, 18b, 18c, the flow rate sensor 11, the hot water supply pump 10 and the solenoid valve 16 to a line 20.
Are connected to each other. Reference numeral 21 is a water supply tank, which supplies water through the makeup water line 22 based on hot water supply to the load side. In addition, the combustion and stop of the hot water boiler 1
Although it is performed by a controller (not shown) attached to the hot water boiler 1, it may be performed by the controller 19 if necessary.

The operation of the hot water supply system of the hot water boiler having the above structure will be described. During the initial operation of this hot water supply system, the electromagnetic valve 16 of the hot water supply passage 17 is closed, and if the heating fluid of the hot water boiler 1 reaches a predetermined temperature, the water supply pump 7 of the water supply line 8
The hot water is stored in the hot water storage tank 6, and if there is a hot water supply request from the load side during the initial operation, the hot water heat-exchanged by the heat exchanger 3 is directly supplied to the hot water supply outlet 9 through the hot water supply line 12. The flow rate sensor 11 detects the flow rate by supplying hot water from the hot water supply outlet 9, and notifies the controller 19 of this detection signal. The controller 19 drives the hot water supply pump 10 based on the signal from the flow rate sensor 11 and stops the operation when the hot water supply is stopped.

When the load on the load side decreases, hot water flows into the hot water storage tank 6 through the hot water circulation path 14 connected to the hot water supply line 12, and hot water of a predetermined temperature is stored up to a preset position. When the demand on the load side suddenly increases, the controller 19 drives the hot water supply pump 10 and opens the solenoid valve 16 of the hot water supply passage 17 based on the detection signal from the flow rate sensor 11 to open the hot water storage tank. The warm water in 6 and the warm water from the heat exchanger 3 are combined and supplied. Therefore, it is possible to cope with a sudden load increase on the load side as compared with the conventional supply system.

[0012]

As described above, according to the present invention, a hot water storage tank is provided in a hot water boiler equipped with a heat exchanger,
The hot water storage tank and the inlet of the heat exchanger are connected by a water supply line equipped with a water supply pump, and the outlet of the heat exchanger and the hot water supply outlet are connected by a hot water supply line equipped with a hot water supply pump and a flow rate sensor. Since the hot water circulating passage provided with a check valve and the hot water supply passage provided with a check valve and a solenoid valve are connected between a predetermined portion of the hot water supply line and the hot water storage tank, the initial operation of the hot water boiler is performed. At this time, the waiting time can be shortened by directly supplying the hot water that has undergone heat exchange in the heat exchanger to the load. Further, it is possible to sufficiently cope with a sudden load increase on the load side as compared with the conventional hot water supply system.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram showing an overall configuration of a hot water supply system for a hot water boiler embodying the present invention.

FIG. 2 is a schematic explanatory view showing a hot water supply system of a conventional hot water boiler.

[Explanation of symbols]

 1 Hot Water Boiler 3 Heat Exchanger 3a Inlet 3b Outlet 6 Hot Water Storage Tank 7 Water Supply Pump 8 Water Supply Line 9 Hot Water Supply Exit 10 Hot Water Supply Pump 11 Flow Rate Sensor 12 Hot Water Supply Line 13 Check Valve 14 Hot Water Circulation Path 15 Check Valve 16 Solenoid Valve 17 Hot Water Supply Path

Claims (1)

[Claims] 1. A hot water boiler 1 having a heat exchanger 3 is provided with a hot water storage tank 6 for storing hot water, and the hot water storage tank 6 and an inlet 3a of the heat exchanger 3 are connected by a water supply line 8 having a water supply pump 7. While connected, the outlet 3b of the heat exchanger 3
The hot water supply pump 10 and the flow rate sensor 11 are provided between the hot water supply port 9 and the hot water supply outlet 9.
Is connected by a hot water supply line 12 equipped with
The hot water boiler is characterized in that a hot water circulating passage 14 having a check valve 13 and a hot water supply passage 17 having a check valve 15 and a solenoid valve 16 are connected between a predetermined portion of the hot water storage tank 6 and the hot water storage tank 6. Hot water supply system.