JPH08200815A - Hot water boiler - Google Patents

Abstract

PURPOSE: To cause appearance of a hot water boiler to look neat, to save work, and to reduce an installation space by a method wherein an expansion tank connected to a connection pipe, installed at a heat-exchanger, through a branch connection pipe is arranged in a cabinet. CONSTITUTION: The whole of a heat-exchanger 1 and a burner 2 is covered with a cabinet 3 and a hot water circulation pump 4 is disposed in the cabinet 3. A heating outbound pipe 7 provided at a tip with a heating outbound port 6 is connected to the hot water circulation pump 4 and a heating return pipe 9 having a heating return port 8 is arranged at the lower part of the heat- exchanger 1. The heating outbound port 6 of the heating outbound pipe 7 and the heating return port 8 of the heating return pipe 9 are disposed at the inner lower part of the cabinet 3. Further, an expansion tank 5 is disposed in the cabinet 3 and in the lower position of the heat-exchanger 1 and connected to a connection pipe 5 through a branch connection pipe 11. This constitution causes appearance of a hot water boiler to look neat, saves work, and reduces an installation space.

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 having a small installation space.

[0002]

2. Description of the Related Art A conventional hot water boiler is provided with a heat exchanger, a burner and a circulation pump in a cabinet, and the hot water heated by the burner is radiated for heating installed outside the boiler via the circulation pump. Piping for circulation is performed so that the circulating hot water that has been supplied to the main body of the vessel and has lost the thermal energy returns to the heat exchanger. An expansion tank is connected to a part of this hot water circulation pipe to keep the internal pressure of the pipe constant even if the circulating hot water expands due to temperature, etc. It is installed outside the hot water boiler to prevent damage.

[0003]

However, in the structure of the conventional hot water boiler, since the expansion tank is exposed to the outside of the hot water boiler, fixing the expansion tank and piping work are required, and the work is troublesome. It requires a tank installation space, which damages the appearance of the hot water boiler and does not look good.

An object of the present invention is to make the appearance of a hot water boiler clean, to save the work, and to reduce the installation space.

[0005]

The present invention has been made to achieve the above object, and comprises a heat exchanger having a burner,
While storing the hot water circulation pump in the cabinet,
The gist is to incorporate an expansion tank that is connected to a connection pipe provided in a heat exchanger via a branch connection pipe into the cabinet of the hot water boiler.

[0006]

[Operation] Since the expansion tank is installed in the cabinet together with the heat exchanger of the hot water boiler and below the heat exchanger, the on-site installation work is easy, the installation space is reduced, and the expansion tank is hot water. Since it is not exposed to the outside of the boiler, it has a neat appearance and a good-looking appearance.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The hot water boiler of the present invention will be described below with reference to the embodiments shown in the drawings. In the figure, reference numeral 1 denotes a heat exchanger, and a burner 2 is arranged on the side of the heat exchanger 1 so as to heat water for heating and other fluids circulating in the heat exchanger. 1, the entire burner 2 cabinet 3
Cover with. A hot water circulation pump 4 is arranged in the cabinet 3, and the hot water circulation pump 4 is connected to the heat exchanger 1 through a connecting pipe 5 and is heated by the heat exchanger 1. Is supplied to the hot water circulation pump 4.

The hot water circulation pump 4 is connected to a heating outflow pipe 7 having a heating outflow port 6 at the tip thereof, and a heating return pipe 9 having a heating return port 8 is provided below the heat exchanger 1, respectively. Plumbing. Further, the heating return port 6 of the heating return pipe 7 and the heating return port 8 of the heating return pipe 9 are arranged in the cabinet, preferably in the lower part of the cabinet. The cabinet 3 is fixed to the floor surface 12, and the base has a hole for piping for circulating hot water.

Further, the expansion tank 10 is provided in the cabinet.
Is preferably disposed below the heat exchanger and is connected to the connecting pipe 5 through a branch connecting pipe 11. The expansion tank 10 is a sealed tank having a predetermined capacity according to the circulating amount of hot water for heating, and even if the hot water for heating expands by heating and the pressure in the heat exchanger and the circulation pipe rises. The pressure increase is temporarily absorbed to prevent damage to the heat exchanger, radiator body, and piping system.

When installing the hot water boiler constructed as described above, the outflow pipe and the return pipe are set up in advance in proximity to each other from the floor surface 12, and the hot water boiler is placed at the position of the outflow pipe and the return pipe. After installation and installation from above, the outflow pipe is connected to the heating outflow port 6 and the return pipe is connected to the heating return port 8, respectively, and piping is performed to complete the installation. In addition,
The tips of the outgoing pipe and the return pipe are connected to a heating radiator (not shown).

Next, the operation of the above embodiment will be described with reference to FIG. The hot water for heating is cooled by exchanging heat with a heating radiator (not shown), and then returned to the heat exchanger 1 from the heating radiator through the return pipe, the heating return port 8 and the heating return pipe 9. To be done. When the cooled hot water flows through the heat exchanger 1, the burner 2 heats it to a predetermined temperature. The heated hot water for heating passes through the connection pipe 5 and the hot water circulation pump 4, passes through the heating outflow port 6 of the heating outflow pipe 7 and the outflow pipe, is supplied to the heating radiator, and the hot water is circulated. . In this way, hot water is circulated by the hot water circulation pump 4 between the heating radiator and the heat exchanger 1, and desired heating is performed.

At this time, a part of the circulating hot water is connected to the connecting pipe 5,
It is supplied via the branch connecting pipe 11. When the pressure in the piping system connecting the heat exchanger 1 and the heating radiator rises,
Through the branch connecting pipe 11, the pressure increase is due to the expansion tank 1
It is introduced to 0, absorbs the increase in the pressure of the piping system, and keeps the pressure constant.

[0013]

According to the hot water boiler of the present invention, since the expansion tank is incorporated in the lower part of the cabinet of the hot water boiler, the installation work is facilitated, the installation space is reduced, and the work and space can be saved. Is. Also, since the expansion tank is not exposed to the outside of the hot water boiler, the appearance is neat and the appearance is good.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a hot water boiler of the present invention.

[Explanation of symbols]

 1 Heat Exchanger 2 Burner 3 Cabinet 4 Hot Water Circulation Pump 6 Heating Outlet 7 Heating Outlet Pipe 8 Heating Return Port 9 Heating Return Pipe 10 Expansion Tank 11 Connection Pipe

Claims (3)

[Claims] 1. In a hot water boiler in which a heat exchanger having a burner and a hot water circulation pump are housed in a cabinet, an expansion tank connected to a connecting pipe provided in the heat exchanger via a branch connecting pipe is provided in the cabinet. A hot water boiler characterized by being installed inside. 2. The hot water boiler according to claim 1, wherein the expansion tank is provided in a cabinet below the heat exchanger. 3. The hot water boiler according to claim 1, wherein an expansion tank and a pipe connection port for circulating hot water are provided in the cabinet.