JPS6337610Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to an air separation device that prevents contact between heating circulating water and air in the heating water circuit of a heater and reduces the number of times the heating is opened and closed. .

Conventional configuration and its problems Traditionally, open tank → pump → heat exchanger →
In a heater having a heating circulation water circuit to an open tank, the heating return water flowing into the water stored in the open tank is stirred in the open tank and circulated to the pump side. Therefore, there is a problem in that air from the water surface in the open tank easily enters the heating circulating water, which adversely affects the durability of the heating circulating water circuit.

In addition, conventional air separation devices installed in open tanks either partition the inside of the tank between two plates with an opening in part, or partition the tank with a single plate with a hole in the center. In some cases, the water supply pipe connected to the heating return water side is installed in the tank in an upward direction, and the water intake pipe connected to the pump side is installed in a downward direction.
In the former structure, many parts are required to seal the inner circumferential surface of the tank and the periphery of the plate, resulting in a complicated device due to its shape and size. Since the water pipe is inside the tank and cannot be seen directly from the outside, there is a risk that the water pipe and intake pipe may be mistakenly connected.

Purpose of the invention The present invention is to eliminate the above-mentioned drawbacks of the conventional technology. To provide an air separation device in a heating water circuit that prevents air from coming into contact with the water surface in a tank and automatically sucks up water in an open tank to reduce the number of opening and closing times of heating.

Composition of the invention In order to achieve the above object, the air separation device for the heating water circuit of the invention has one end connected to the heating return water side of the heating water circuit and the other end connected to the pump side in an open tank. A condition in which an inverted U-shaped pipe is installed, and an upper straight short pipe that opens upward below the water surface in an open tank is connected to the upper peripheral surface of the inverted U-shaped pipe, and its lower end communicates with the inverted U-shaped pipe. It has a structure in which a lower straight tube is provided on the lower circumferential surface and is open downward and communicates with the inverted U-shaped tube.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 is the heater body, and there is a gas block 2 inside it.
The burner 4 is connected and communicated with the gas block 2.
A heat exchanger 3 which is heated by the heat exchanger 3 is disposed, and a combustion fan 5 is further connected to the upper part of the heat exchanger 3.

6 is a heating water circuit, a part of which is wrapped around the heat exchanger 3, and one end of the wrapped pipe is welded and fixed to the bottom of one side of the open tank 7 to form a pump side joint 8. The other end is connected to the heating return water joint 12 which is welded and fixed to the bottom of the other side of the open tank 7 via a radiator 11 disposed outside the heater main body 1. The open tank 7 is disposed at a suitable upper part within the heater body 1.

9 is a pump for pumping water from the open tank 7 to the heat exchanger 3 side in the heating water circuit 6;
It is provided in the pipe line 10 on the side of the pump-side joint 8.

13 is an air separation device installed in the open tank 7, which is an inverted U that forms part of the heating water circuit 6.
An upper straight short tube 15 that opens upward is protrudingly provided on the upper peripheral surface of the horizontal tube portion of the shaped tube 14, with its lower end communicating with the inside of the inverted U-shaped tube 14,
A lower straight short tube 16 that communicates with the inverted U-shaped tube 14 and opens downward is integrally installed on the lower peripheral surface, and one end opening of this inverted U-shaped tube 14 is connected to the inverted U-shaped tube 14.
It is connected to the pump-side joint 8 via a ring 18, while the other end opening is connected to the heating return water joint 12 via an O-ring 17.

Hereinafter, the effects of the above configuration will be explained.

When the open tank 7 is filled with water, the water fills the heating water circuit 6 from the inverted U-shaped pipe 14 through the upper and lower straight pipes 15 and 16. Then, when the open end of the upper straight pipe 15 is submerged under the water surface in the open tank 7, the pump 9 is driven, the burner 4 is combusted, and the combustion fan 5 is rotated at the same time. Water in the heating water circuit 6 heats up while passing through the heat exchanger 3, radiates heat in the radiator 11, and then flows through the inverted U-shaped pipe 14 of the air separator device 13 in the open tank 7.

At this time, since the upper straight short pipe 15 protruding from the upper peripheral surface of the inverted U-shaped pipe 14 is below the water surface in the open tank 4, the circulating water flowing through the inverted U-shaped pipe 14 flows into the open tank 7. Therefore, there is no risk of air getting mixed into the inverted U-shaped pipe 14, and the presence of air in the circulating water when flowing below the upper straight pipe 15 is eliminated. The air bubbles rise from the inverted U-shaped tube 14 into the upper straight tube 15 due to buoyancy, and air is vented from the open end of this upper straight tube 15 into the open tank 7. The water in the open tank 7 is sucked up into the inverted U-shaped pipe 14 through the lower straight pipe 16 by the flow pressure of the circulating water flowing through the shaped pipe 14.

Effects of the invention As described above, the air separation device in the heating water circuit of the invention has an inverted U-shape in which one end is connected to the heating return water side of the heating water circuit and the other end is connected to the pump side in the open tank. A straight short pipe is placed on the upper circumferential surface of this inverted U-shaped pipe, and the lower end is an inverted U-shaped pipe that opens upward under the water surface in the open tank.
In addition to communicating with and protruding into the inside of the inverted U-shaped tube, a lower straight and short tube that communicates with the inverted U-shaped tube and opens downward is provided on the lower circumferential surface, so that the circulation flowing inside the inverted U-shaped tube is prevented. Since the water does not come into contact with the air above the water surface in the open tank, there is no risk of outside air getting mixed into the circulating water, and air bubbles may be present in the circulating water while it is flowing through the inverted U-shaped pipe. is naturally raised by buoyancy from the inverted U-shaped pipe 14 into the upper straight pipe 15, and air can be vented into the open tank 7 from the open end of the upper straight pipe 15. This prevents the pump from idling and improves the durability of the heating circulating water circuit. In addition, the water in the open tank can be sucked up into the heating circulating water circuit through the lower straight short pipe using the circulating pressure of the heating circulating water, thereby reducing the number of openings and closings of the heating system. When connecting both ends to the heating return water side and the pump side, it is possible to connect both ends to the heating return water side and the pump side without depending on the upper straight short pipe or the lower straight short pipe.In other words, either end of the inverted U-shaped pipe can be connected to the heating Even if it is connected to the return water side and the pump side, it can function as an air separation device, and there is no risk of connecting the inverted U-shaped pipe by mistake, and it can simplify the connection work. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a configuration diagram of a heater, and FIG. 2 is a front sectional view of an air separation device in an open tank. 1 is the heater body, 2 is the gas block, 3 is the heat exchanger, 4 is the burner, 5 is the combustion fan, 6 is the heating water circuit, 7 is the open tank, 8 is the pump side joint, 9
is the pump, 11 is the radiator, 12 is the heating return joint,
13 is an air separation device, 14 is an inverted U-shaped pipe,
15 is an upper straight short tube, 16 is a lower straight short tube.

Claims (1)

[Scope of utility model registration request] Inside the open tank, an inverted U-shaped pipe is installed, one end of which connects to the heating return water side of the heating water circuit, and the other end of which connects to the pump side. An upper straight and short pipe that opens upward under the water surface inside is installed with its lower end communicating with the inside of the inverted U-shaped pipe, and an inverted U-shaped pipe is installed on the lower peripheral surface.
An air separation device in a heating water circuit, which is provided with a lower straight short pipe that communicates with a shaped pipe and opens downward.