JP2022174449A - Boiler device with radiation heating function - Google Patents

Abstract

To provide a boiler device with a radiation heating function that can perform both radiation heating and hot-water heating alone, having improved heating efficiency.SOLUTION: A boiler device with a radiation heating function includes: a secondary heat exchanger (26) that is disposed downstream from a primary heat exchanger (20), recovers sensible heat or latent heat from a combustion gas, and heats hot water circulating through a hot water return pipe (33); a heating circuit (34) that connects an external heating terminal, a can body (10) and the secondary heat exchanger (26) with a hot water forward pipe (32) and the hot water return pipe (33); and a bypass exhaust path (50) that bypasses the primary heat exchanger (20) and connects a combustion chamber (15) to a secondary heat exchange chamber (25) or an exhaust chamber (17). The bypass exhaust path (50) allows radiation heat release to outside of the cabinet (2).SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler apparatus for domestic heating, and more particularly to a boiler apparatus with a radiant heating function that has both a radiant heating burner and a hot water heating burner with one burner.

Conventionally, as a boiler device for heating, as shown in FIG. The feed pipe 132 is equipped with a pump 136 and a steam separator 145, and the hot water return pipe 133 and the hot water feed pipe 132 are connected to a heating terminal (not shown). Furthermore, due to the combustion of the burner 113 provided at the bottom of the can body 110, the high-temperature combustion gas is heat-exchanged in the heat exchanger 120, heating the hot water of the can body 110 to a predetermined temperature, and passing through the exhaust chamber 117. After that, it was discharged to the outside of the housing 102 from the exhaust pipe 118 . As a result, it was possible to heat the room by circulating a predetermined amount of hot water through the heating terminal.
As such a boiler apparatus, there is, for example, Patent Document 1.

On the other hand, there are the following as those equipped with hot water heating function and radiant heating function. That is, it has a combustion cylinder made of a heat-resistant transparent body that communicates with the burner, and a cylindrical red-hot body is provided hanging from the upper part and is heated by the combustion gas and glows red. In a heater that forms a room and performs radiant heating by reflecting a red-hot state into the room, a heat exchanger that has hot water inside by the combustion gas, the temperature of which has been lowered by a radiator arranged outside the appliance. There was a heater with a built-in hot water heat exchanger that heats and circulates hot water to a predetermined temperature with a circulation pump.
As such a hot water heat exchanger built-in stove, there is Patent Document 2, for example.

Japanese Patent No. 3845240 Japanese Patent No. 4021631

By the way, the housing situation in recent years in large metropolitan areas in cold regions such as Sapporo City, Hokkaido, is that the need for a large living room has diminished due to the increasing number of nuclear families and the aging of the population, or that a large living room has been secured due to an increase in the number of home workers. There is a trend that it is not possible.
In addition, due to housing structures unique to cold regions, such as double-glazed windows and improved insulation performance, the need for large-capacity heating as in the past is fading.
Under these circumstances, as for the heating needs in cold regions, radiant heating with moderate heating capacity according to the size of the living room and hot water central heating for the whole building are new lifestyle heating. emerging as a need.

However, conventional stoves with built-in hot water heat exchangers are configured to recover latent heat using exhaust heat and enable hot water heating, but even when radiant heating and hot water heating are used together, the thermal efficiency is high. It was relatively low at around 80%, and the improvement of thermal efficiency was an issue.

The present invention has been made in view of this background, and provides a boiler device with a radiant heating function that improves the heat exchange rate in a boiler device with a radiant heating function that can combine radiant heating and hot water heating in one unit. intended to

SUMMARY OF THE INVENTION The present invention has been made to achieve the above objects. a combustion chamber in which the burner burns; a primary heat exchanger that recovers heat from the combustion gas generated by the burner and heats the hot water; and the primary heat exchanger disposed above the primary heat exchanger. an exhaust chamber for collecting the combustion gas after passing through the vessel, and a secondary heat disposed downstream of the exhaust chamber for recovering sensible heat or latent heat from the combustion gas and heating the hot water flowing through the hot water return pipe. An exchanger, a connecting pipe that connects the can body and the secondary heat exchanger, and an external heating terminal, the can body and the secondary heat exchanger are connected by a hot water supply pipe and a hot water return pipe. a heating circuit, a pump for circulating the hot water in the heating circuit, a secondary heat exchange chamber provided with the secondary heat exchanger therein, and a combustion gas after passing through the secondary heat exchange chamber circulating. an exhaust stack that communicates with the outside, a bypass exhaust passage that bypasses the primary heat exchanger and connects the combustion chamber and the secondary heat exchange chamber or the exhaust chamber, wherein the bypass The exhaust path is characterized in that it can radiate heat to the outside from the housing.

In claim 2, the bypass exhaust passage bypasses the primary heat exchanger and connects the combustion chamber and the secondary heat exchange chamber, wherein the secondary heat exchange chamber is connected to the hot water return pipe. A hot water return port is provided, and the hot water return port is arranged in the vicinity of a connection portion between the secondary heat exchange chamber and the bypass exhaust passage.

In claim 3, the bypass exhaust passage bypasses the primary heat exchanger and connects the combustion chamber and the exhaust chamber, wherein the secondary heat exchange chamber is a hot water return port connected to the hot water return pipe. and the hot water return port is disposed in the vicinity of the connecting portion between the secondary heat exchange chamber and the exhaust chamber.

In a fourth aspect of the present invention, a damper configured to open and close the bypass exhaust passage is provided, a control unit for controlling opening and closing of the damper, an operation unit communicably connected to the control unit, and a control unit provided in the operation unit. and a change-over switch, and the control section opens and closes the damper in accordance with on/off of the change-over switch.

According to claim 1 of the present invention, a secondary heat exchanger is arranged downstream of the exhaust chamber and recovers sensible heat or latent heat from the combustion gas to heat the hot water flowing through the hot water return pipe; A bypass exhaust passage bypassing the primary heat exchanger and connecting the combustion chamber and the secondary heat exchange chamber or the exhaust chamber is provided, and the bypass exhaust passage can radiate heat to the outside from the housing.
As a result, hot water heating can be performed in the primary heat exchanger and radiant heating can be performed in the bypass exhaust passage, so both radiant heating and hot water heating can be provided by one unit, and combustion is performed in the secondary heat exchanger. It is possible to provide a boiler apparatus with a radiant heating function that can absorb exhaust heat of gas with hot water after radiating heat at an external heating terminal, thereby improving the heat exchange rate.

According to claim 2, in which the bypass exhaust passage bypasses the primary heat exchanger and connects the combustion chamber and the secondary heat exchange chamber, the secondary heat exchange chamber is connected to the hot water return pipe. The hot water return port is provided in the vicinity of the connecting portion between the secondary heat exchange chamber and the bypass exhaust passage.
As a result, immediately after the high-temperature combustion gas from the bypass exhaust passage flows into the secondary heat exchange chamber, the hot water after radiating heat at the external heating terminal flows from the hot water return port, and the heat of the combustion gas is transferred. Since the hot water can be absorbed, the temperature of the entire secondary heat exchange chamber through which the combustion gas passes can be effectively reduced, and the durability of the secondary heat exchange chamber due to long-term use can be improved. is.

According to claim 3, in which the bypass exhaust passage bypasses the primary heat exchanger and connects the combustion chamber and the exhaust chamber, the secondary heat exchange chamber is hot water connected to the hot water return pipe. A return port is provided, and the hot water return port is arranged in the vicinity of the connecting portion between the secondary heat exchange chamber and the exhaust chamber.
As a result, immediately after the high-temperature combustion gas from the exhaust chamber flows into the secondary heat exchange chamber, the hot water after radiating heat at the external heating terminal flows from the hot water return port, and the heat of the combustion gas is transferred to the heat exchange chamber. Since hot water can be absorbed, the temperature of the entire secondary heat exchange chamber through which the combustion gas passes can be effectively reduced, and the durability of the secondary heat exchange chamber due to long-term use can be improved. be.

According to claim 4, a damper is provided that can open and close the bypass exhaust passage, and the damper is opened and closed according to the on/off of the changeover switch. The output of radiant heating can be varied without impairing the feeling of heating. Also, by closing the damper, it is possible to minimize radiation heating and give priority to hot water heating connected to the heating circuit.

Schematic configuration diagram of a boiler device with a radiant heating function for explaining the first embodiment of the present invention FIG. 1 is a block diagram of main parts for explaining a first embodiment of the present invention; Flowchart for explaining the first embodiment of the present invention Schematic configuration diagram of a boiler device with a radiant heating function for explaining a second embodiment of the present invention Schematic configuration diagram for explaining an embodiment of a conventional boiler device

1st Embodiment of the boiler apparatus with a radiant heating function concerning this invention is described with reference to drawings. In addition, in each figure, the same code|symbol is attached|subjected about a common component and the same kind of component, and those overlapping description is abbreviate|omitted suitably.

As shown in FIG. 1, 1 is a boiler device with a radiant heating function, in which a certain amount of hot water is stored, and combustion air is supplied from a blower fan 14 to burn fuel (kerosene or gas). A burner 13 as a device, a primary heat exchanger 20 that recovers heat from the combustion gas generated by combustion of the burner 13 and heats the hot water, and is disposed above the primary heat exchanger 20 and passes through the primary heat exchanger 20. It has an exhaust chamber 17 for gathering combustion gas after combustion.

The primary heat exchanger 20 includes a cylindrical can body 10 in which a certain amount of hot water is stored, a combustion chamber 15 formed inside the lower part of the can body 10 and in which the burner 13 performs combustion, the combustion chamber 15 and exhaust gas. It is composed of a plurality of smoke pipes 16 that communicate with the chamber 17 and allow the combustion gas generated by the combustion of the burner 13 to pass through.

Reference numeral 21 denotes a can body temperature sensor that detects the temperature of the hot water in the can body 10 (can body temperature), which is attached approximately in the upper and lower center of the can body 10 .

Furthermore, a hot water outlet 23 for circulating the hot water stored in the can body 10 is provided on the side peripheral surface of the can body 10, and the hot water outlet 23 for circulating the hot water stored in the can body 10 is provided. An inflow connection port 29 for returning the hot water to the hot water outlet 23 is provided, and a heating terminal (not shown) is connected between the hot water outlet pipe 32 connected to the hot water outlet 23 and the hot water return pipe 33 connected to the hot water return port 24, A heating circuit 34 is formed by connecting a pump 36 for circulating hot water to the heating terminal and a steam separator 45 for separating air bubbles generated in the hot water to the hot water supply pipe 32 .

On the other hand, the primary heat exchanger 20 is bypassed and the combustion chamber 15 and the secondary heat exchange chamber 25 are connected by a bypass exhaust passage 50, and the bypass exhaust passage 50 is connected to the front of the boiler device 1 with a radiant heating function from the housing 2. The heat radiating part 51 of the bypass exhaust path 50 is arranged in an exposed state and is capable of radiating heat to the outside of the housing 2 .

The secondary heat exchange chamber 25 is disposed above the exhaust chamber 17, and the connection portion between the secondary heat exchange chamber 25 and the bypass exhaust passage 50 and the connection portion between the secondary heat exchange chamber 25 and the exhaust chamber 17 are separated. Combustion gas flows into the secondary heat exchange chamber 25 from the bypass exhaust passage 50 and the exhaust chamber 17 via these connecting portions.
Further, the secondary heat exchange chamber 25 has an exhaust pipe 18 for discharging the combustion gas after passing through the secondary heat exchange chamber 25 to the outside of the machine.

In addition, the secondary heat exchange chamber 25 is provided with a hot water return port 24 in the vicinity of the connection portion between the secondary heat exchange chamber 25 and the bypass exhaust passage 50, and the connection portion between the secondary heat exchange chamber 25 and the exhaust pipe 18. An outflow connection port 28 is arranged in the vicinity.

A secondary heat exchange pipe 27 that connects the hot water return port 24 and the outflow connection port 28 is disposed inside the secondary heat exchange chamber 25 . It functions as a secondary heat exchanger 26 that recovers sensible heat or latent heat from the combustion gas from the hot water return pipe 33 and heats the hot water flowing through the hot water return pipe 33 .
37 is a connecting pipe that connects the outflow connection port 28 and the inflow connection port 29 .
Thereby, the sensible heat or latent heat of the combustion gas can be recovered by the secondary heat exchanger 26 to improve the thermal efficiency.

As a result, part of the combustion gas from the burner 13 passes from the combustion chamber 15 through the smoke pipe 16 and heat-exchanges in the primary heat exchanger 20, heats the hot water in the boiler body 10, and then passes through the exhaust chamber 17 for secondary heat exchange. It flows into the chamber 25 and is discharged out of the instrument through the exhaust tube 18 . Hot water in the can body 10 is used for hot water heating by the heating circuit 34 .
Further, part of the combustion gas from the burner 13 flows from the combustion chamber 15 through the bypass exhaust passage 50, releases the heat of the combustion gas from the heat radiating portion 51, flows to the secondary heat exchange chamber 25 and joins the exhaust pipe. 18 is discharged to the outside of the instrument.
As a result, hot water heating of the boiler device 1 with radiation heating function and radiation heating to the front of the appliance can be performed by one unit.

Further, since the hot water return port 24 is arranged near the connection portion between the secondary heat exchange chamber 25 and the bypass exhaust passage 50 , the hot combustion gas from the bypass exhaust passage 50 flows into the secondary heat exchange chamber 25 immediately after the high temperature combustion gas flows. Then, the hot water after radiating heat from the external heating terminal flows from the hot water return port 24, and the hot water can absorb the heat of the combustion gas, so the temperature of the entire secondary heat exchange chamber 25 through which the combustion gas passes. It can be effectively reduced, and the durability of the secondary heat exchange chamber 25 due to long-term use can be improved.

Further, a damper chamber 54 communicating with the bypass exhaust passage 50 and the secondary heat exchange chamber 25 is provided, and a damper 53 for opening and closing the bypass exhaust passage 50 is provided inside the damper chamber 54 .

The damper 53 is opened and closed by an actuator (not shown) and an interlocking plate that receives a signal from the control unit 80 .
When the damper 53 is open, combustion gas flows through the bypass exhaust passage 50, so radiation heating by the radiator 51 can be performed, and at the same time hot water heating by the heating circuit 34 can be performed together.
On the other hand, when the damper 53 is in the closed state, the bypass exhaust passage 50 is blocked and the hot water heating by the heating circuit 34 is prioritized in the exhaust state.

Reference numeral 91 denotes an operation unit provided in the boiler apparatus 1 with a radiant heating function.

The changeover switch 94 opens and closes the damper 53 according to the on/off of the changeover switch 94, and either the radiation heating by the heat radiating part 51 and the hot water heating by the heating circuit 34 are operated together, or the hot water heating is performed with the radiation heating at the minimum output. is a switch that enables selection of whether to give priority to
That is, when ON is selected with the changeover switch 94, the damper 53 is opened and combustion gas flows through the bypass exhaust passage 50, and radiant heating can be performed by the heat radiating portion 51. A stream of combustion gases is formed which allows heat exchange in the exchanger 20 .
On the other hand, when the changeover switch 94 is turned off, the damper 53 is closed and the bypass exhaust passage 50 is blocked, forming a combustion gas flow capable of exchanging heat with the primary heat exchanger 20 inside the boiler body 10 . be done.

As shown in FIG. 2, reference numeral 80 denotes a control unit comprising a microcomputer for performing combustion control of the burner 13 and opening/closing control of the damper 53. The can body temperature sensor 21 is connected to the input side, and the burner 13 and air blowing are connected to the output side. A fan 14, a pump 36 and a damper 53 are connected.
Also, the control unit 80 and the operation unit 91 are connected so as to be able to communicate with each other.

Next, operation of the first embodiment of the present invention will be described with reference to FIG.
The control unit 80 reads the state of the changeover switch 94 in step S1, and when the changeover switch 94 is on, the process proceeds to step S2, and when the changeover switch 94 is off, the process proceeds to step S3.
In step S2, an actuator (not shown) is driven to open the damper 53, and the process proceeds to step S1.

In step S3, an actuator (not shown) is driven to close the damper 53, and the process proceeds to step S1.

As a result, when the changeover switch 94 is turned on, the radiation heating by the heat radiating part 51 and the hot water heating by the heating circuit 34 can be performed simultaneously, and when the changeover switch 94 is turned off, the output of the hot water heating by the heating circuit 34 is reduced. Radiant heating by the radiator 51 can be minimized without change.
Therefore, the mutual influence of the radiant heating output and the hot water heating output can be minimized, and the radiant heating output can be varied.

Next, a second embodiment of the boiler apparatus with radiation heating function according to the present invention will be described.

As shown in FIG. 4 , the second embodiment is based on the first embodiment, and the bypass exhaust passage 50 bypasses the primary heat exchanger 20 and connects the combustion chamber 15 and the exhaust chamber 17 .
The secondary heat exchange chamber 25 is disposed above the exhaust chamber 17, and has a connection portion between the secondary heat exchange chamber 25 and the exhaust chamber 17, and the combustion gas flows from the exhaust chamber 17 through the connection portion. It flows into the secondary heat exchange chamber 25 .

The secondary heat exchange chamber 25 is provided with a hot water return port 24 near the connection between the secondary heat exchange chamber 25 and the exhaust chamber 17, and near the connection between the secondary heat exchange chamber 25 and the exhaust pipe 18. An outflow connection port 28 is arranged in the .

As a result, part of the combustion gas from the burner 13 passes from the combustion chamber 15 through the smoke pipe 16 and heat-exchanges in the primary heat exchanger 20, heats the hot water in the boiler body 10, and then passes through the exhaust chamber 17 for secondary heat exchange. It flows into the chamber 25 and is discharged out of the instrument through the exhaust tube 18 . Hot water in the can body 10 is used for hot water heating by the heating circuit 34 .
Also, part of the combustion gas from the burner 13 flows from the combustion chamber 15 through the bypass exhaust passage 50, releases the heat of the combustion gas from the heat radiating portion 51, flows to the exhaust chamber 17 and joins the secondary heat exchange chamber. 25 and is discharged from the exhaust tube 18 to the outside of the instrument.
As a result, hot water heating of the boiler device 1 with radiant heating function and radiant heating to the front of the appliance are possible with one unit, and the secondary heat exchanger 26 recovers the sensible heat or latent heat of the combustion gas to improve thermal efficiency. can be made

Further, since the hot water return port 24 is arranged near the connection portion between the secondary heat exchange chamber 25 and the exhaust chamber 17, immediately after the hot combustion gas from the exhaust chamber 17 flows into the secondary heat exchange chamber 25, Hot water after radiating heat from the external heating terminal flows from the hot water return port 24, and the hot water can absorb the heat of the combustion gas, so the temperature of the entire secondary heat exchange chamber 25 through which the combustion gas passes can be effectively adjusted. , and the durability of the secondary heat exchange chamber 25 due to long-term use can be improved.

In this embodiment, the combustion equipment constituting the burner 13 mounted upward has been described, but the invention is not limited to this, and the combustion equipment constituting the gun-type burner mounted sideways, for example, may be used.

In addition, although the operation part 91 is provided in the boiler apparatus 1 with a radiant heating function, it may be provided outside the boiler apparatus 1 with a radiant heating function.

Warm air heating can also be performed by directing air from a convection fan (not shown) toward the bypass exhaust path 50 and blowing the warm air out of the appliance, which may be performed within the scope of design by those skilled in the art. be.

It should be noted that other configurations used in the present embodiment are presented as an example, and are not intended to limit the scope of the invention, and can be implemented in various other forms. Various omissions, replacements, and changes can be made without departing from the scope of the description. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

1 Boiler Apparatus with Radiant Heating Function 2 Housing 10 Can Body 13 Burner 14 Blower Fan 15 Combustion Chamber 17 Exhaust Chamber 18 Exhaust Stack 20 Primary Heat Exchanger 25 Secondary Heat Exchange Chamber 26 Secondary Heat Exchanger 32 Hot Water Supply Pipe 33 Hot Water Return pipe 34 Heating circuit 36 Pump 37 Connecting pipe 50 Bypass exhaust passage 53 Damper 80 Control unit 91 Operation unit 92 Display unit 94 Switch

Claims (4)

a can body for storing hot water in a housing;
a burner for heating the can body;
a combustion chamber formed inside the lower part of the can body in which the burner burns;
a primary heat exchanger that recovers heat from combustion gas generated by combustion of the burner and heats the hot water;
an exhaust chamber disposed above the primary heat exchanger and collecting combustion gas after passing through the primary heat exchanger;
a secondary heat exchanger disposed on the downstream side of the exhaust chamber for recovering sensible heat or latent heat from the combustion gas and heating the hot water flowing through the hot water return pipe;
a connecting pipe connecting the can body and the secondary heat exchanger;
a heating circuit connecting an external heating terminal, the can body, and the secondary heat exchanger with a hot water supply pipe and a hot water return pipe;
a pump for circulating the hot water in the heating circuit;
a secondary heat exchange chamber including the secondary heat exchanger therein;
an exhaust pipe through which the combustion gas after passing through the secondary heat exchange chamber flows and communicates with the outside;
In a boiler apparatus comprising
a bypass exhaust passage that bypasses the primary heat exchanger and connects the combustion chamber and the secondary heat exchange chamber or the exhaust chamber;
A boiler apparatus with a radiant heating function, wherein the bypass exhaust passage is capable of radiating heat to the outside of the housing. wherein the bypass exhaust path bypasses the primary heat exchanger and connects the combustion chamber and the secondary heat exchange chamber,
The secondary heat exchange chamber has a hot water return port connected to the hot water return pipe,
2. The boiler apparatus with a radiant heating function according to claim 1, wherein said hot water return port is arranged in the vicinity of a connecting portion between said secondary heat exchange chamber and said bypass exhaust passage. wherein the bypass exhaust path bypasses the primary heat exchanger and connects the combustion chamber and the exhaust chamber,
The secondary heat exchange chamber has a hot water return port connected to the hot water return pipe,
2. The boiler apparatus with a radiant heating function according to claim 1, wherein said hot water return port is arranged in the vicinity of a connecting portion between said secondary heat exchange chamber and said exhaust chamber. providing a damper capable of opening and closing the bypass exhaust path;
a control unit that controls opening and closing of the damper;
an operation unit communicably connected to the control unit;
and a changeover switch provided in the operation unit,
The control unit
4. The boiler apparatus with a radiant heating function according to claim 1, wherein said damper is opened and closed according to on/off of said switch.

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