JPH05296470A - Water feeding method for hot water circulating type heating system - Google Patents

Abstract

(57) [Summary] [Purpose] We would like to use a simple water injection pump for efficient water injection and air removal. [Structure] A circulating pump 8 is driven while pouring water into a pressure tank 3 opened to the atmosphere by a manual pouring pump 10 to fill the system with circulating water. [Effect] Since the pressure tank 3 is open to the atmosphere, air can be smoothly evacuated, and since the manual water injection pump 10 is used, no air is entrained and the water injection time can be greatly shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water injection method in a hot water heating system in which an outdoor unit (heat source device) installed outdoors and a radiator inside a room are connected by a hot water circulation system path.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional water injection method. 1 is an outdoor unit, 2 is a heat exchanger, 3 is a pressure tank, 4
Is a reserve tank, 5 is a radiator, 6 is a hot water outflow pipe from the heat exchanger 2 to the radiator 5, and 7 is once entered from the radiator 5 into the pressure tank 3 and then via the circulation pump 8 to the heat exchanger 2 At the time of performing water injection using the hot water return pipe up to, the water injection hose 9a of the electric pressurizing water injection pump 9 is connected to the pressurizing inlet 7a of the hot water return pipe 7, and the pressure tank 3 is operated by the pressurizing water pump 9. While injecting water into the tank, the pressure in the tank 3 is adjusted to 0.9 kgf / cm ² or more to open the atmosphere release valve in the pressure tank 3 to inject water while pushing out the air in the piping system.
In the figure, 9b shows an overflow hose.

[0003]

Therefore, there are the following drawbacks.

A. An electric pressurizing pump is required.

B. Since the pressurizing pump draws air together with the circulating water, the air in the pipe does not easily escape.

C. The time required for deaeration may reach 30 minutes or longer.

An object of the present invention is to provide a water injection method which solves the above-mentioned drawbacks.

[0008]

The water injection method according to the present invention is as follows.

A water supply pump is connected to a water injection port of a pressure tank incorporated in the outdoor unit, and communication between the pressure tank and the atmosphere is ensured. Then, a water circulation pump is used to inject water into the pressure tank. Water injection method in a hot water circulation heating system that drives a pump to fill circulating water in the system.

[0010]

[Operation] When the construction of the hot water heating system is completed, connect the manual water supply pump to this pressure tank while opening the pressure tank to the atmosphere, first inject a fixed amount of water into the pressure tank, and then turn on the circulation pump. Circulating water is injected while driving to expel air in the piping system. The water in the pressure tank may become full before water injection is completed during this water injection.In this case, water first enters the reserve tank, and when the water in the reserve tank becomes full, it overflows and pumps through the overflow hose. Return to the side container. Completion of water injection in the system,
Make sure that air does not pass through the hot water return pipe.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is an outdoor unit, 2 is a heat exchanger, 3 is a pressure tank, 4 is a reserve tank,
Reference numeral 5 is a radiator, 6 is a hot water outlet pipe from the heat exchanger 2 to the radiator 5, and 7 is a hot water return pipe from the radiator 5 that once enters the pressure tank 3 and reaches the radiator 5 via the circulation pump 8. Is.

Reference numeral 10 is a manual water injection pump, and the water injection pump 10 and the water injection port 3a of the pressure tank 3 are connected by a water injection hose 11, and the overflow of the reserve tank 4 is passed through an overflow hose 12 to the water injection pump 10. It is a structure to return to the container 13 of.

FIG. 2 shows the inlet 3a of the pressure tank 3.
An example of the cap 14 attached to FIG. The tip of the water injection hose 11 is connected to the cap 14, and the air vent port 15 is opened by loosening it. When the water injection hose 11 is removed and the cap 14 is tightened, the air vent port 15 is closed and functions as a pressure tank. is there.

When the construction is completed and injection is performed, first, the cap 4 of the pressure tank 3 is loosened to open the air vent port 15 and the water supply hose 11 is connected. A fixed amount of water is injected into the inside of the pipe 3, and then the circulation pump 8 is driven to eject the air in the piping system to inject the circulating water. Then, the completion of water injection in the system is confirmed by confirming that the air does not pass through the hot water return pipe 7. If the pressure tank 3 becomes full before water injection is completed, first, the reserve tank 4
When the inside of the reserve tank 4 is filled with water, the overflow occurs, and the overflow returns to the container 13 via the overflow hose 12. When the circulation pump 8 causes air biting during this water injection, the circulation pump 8 is turned on and off. For this ON / OFF operation, a manual switch may be used, or an operation switch circuit may be added to the outdoor unit 1 using a connector,
It may be performed automatically (for example, ON for 1 minute and OFF for 20 seconds are repeated). Since it can be understood that the turbulence in the flow will disappear when the air bite is eliminated, the water injection work is completed at this point.

[0015]

The effects of the present invention are as follows.

A. Water injection can be easily done using a manual water injection pump or a dry battery kerosene pump.

B. Since the water injection pump simply injects water, no air enters from the outside.

C. Air is released from the pressure tank into the atmosphere because the pressure tank is opened to the atmosphere and water is injected. As a result, the air can be evacuated smoothly, so that the time required for deflating the air can be greatly shortened as compared with the conventional example.

[Brief description of drawings]

FIG. 1 is an explanatory view of a water injection method according to the present invention.

FIG. 2 is an explanatory view showing an example of a cap of a pressure tank.

FIG. 3 is an explanatory view of a conventional water injection method.

[Explanation of symbols]

 1 Outdoor Unit 2 Heat Exchanger 3 Pressure Tank 4 Reserve Tank 5 Radiator 6 Hot Water Outflow Pipe 7 Hot Water Return Pipe 8 Circulation Pump 9 Electric Pressurizing Water Injection Pump 10 Manual Water Injection Pump 11 Water Injection Hose 12 Overflow Hose 13 Container 14 Cap 15 Air vent

Claims (1)

[Claims] 1. A water supply pump is connected to a water injection port of a pressure tank incorporated in an outdoor unit, and communication between the pressure tank and the atmosphere is ensured, and then water is injected into the pressure tank by the water supply pump. A water injection method in a hot water circulation type heating system that drives a circulation pump to fill circulating water in the system.