JPH10148339A - Hot-water heat exchanger built-in type stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the evaporating sound or boiling sound of dew water or water in heat exchanging pipes upon evaporation by a method wherein hot- water pipes in a heat exchanger for warm water heating system are constituted so that the greater downward slope of them is increased as the pipes become apart from a combustion tube. SOLUTION: Water drops, condensed on the surface of a main heat exchanger 21, flow along heat exchanging pipes 21 and, thereafter, drop on the inner bottom surface at the side of the same apart from the combustion tube 16 since the heat exchanging pipes 21 are retained so as to be slanted down more steeply when they become apart from a combustion tube 16. The inner bottom surface at the side apart from the combustion tube 16 of the hot-water heat exchanger 20 will hardly receive heat from combustion tube 16 or radiation heat from a red hot body 15 and, accordingly, condensed water drops will not be evaporated instantaneously while generating big evaporating sound and will be evaporated slowly even when the condensed water drops fall on the inner bottom surface at the side apart from the combustion tube 16 of the hot-water heat exchanger 20. According to this method, the generation of big evaporating sound or boiling sound can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household stove with a built-in hot water heat exchanger.

[0002]

2. Description of the Related Art Generally, this type of stove is shown in FIGS.
As shown in FIG. 2, during the radiant heating operation from the stove, a flame is formed by the burner 1 and the generated combustion exhaust gas is heated by the red heating element 3 inside the combustion tube 2b to which the heat resistant glass 2a is attached.
Is heated and glows red, and the light from the red-hot body 3 is radiated from the combustion tube 2b together with the radiant heat.

A radiator 4 is connected to the combustion tube 2b, and the radiator 4 has a hot water pipe 5 having a downwardly inclined water pipe 5 as it approaches the combustion tube 2b. A branch 7a to the vessel 6 is provided, and a damper 8 for controlling the flow of the combustion exhaust gas is provided in the branch 7a. When the damper 8 opens the branch portion 7a, that is, at the time of simultaneous operation of the radiant heating from the stove and the floor heating operation, the flow of the high-temperature combustion exhaust gas flows from the combustion tube 2b through the hot water heating heat exchanger 6. After heating the hot water pipe 5 and warming the water flowing through the pipe, the water flows from the outlet 7 b communicating with the radiator 4 to the exhaust part 9. The warmed water is sent to a floor heating panel (not shown) by the circulation pump 10 to perform floor heating. When the damper 8 closes the branch 7a to the hot water heating heat exchanger 6, the high-temperature combustion exhaust gas does not flow into the hot water heating heat exchanger 6, but only exchanges heat with the radiator 4 to exhaust. Will be done.

[0004]

However, in such a conventional configuration, the damper 8 is usually made of metal because the damper 8 is provided in the passage of the high-temperature combustion exhaust gas, that is, in the high-temperature portion, so that the heat exchanger for hot water heating is used. The branch 7a to 6 cannot be completely closed. Since the pressure inside the heat exchanger 6 for hot water heating is lower than that inside the radiator 4, the damper 8
Even when the branch portion 7a is closed, the high-temperature combustion exhaust gas gradually flows into the hot water heating heat exchanger 6 side.

Therefore, even when the damper 8 is in the apparently closed state for controlling the temperature of the hot water during the floor heating operation, the flue gas flowing into the hot water pipe 5 at a low temperature in the portion where the temperature of the hot water pipe 5 is low gradually decreases. Of water will condense. The condensed water droplets flow down the hot water pipe 5 as the hot water pipe 5 is inclined downward as the hot water pipe 5 approaches the combustion tube 2b, and the hot water heating heat exchanger 6 near the combustion tube 2b.
Fall to the bottom of the inside. Combustion tube 2 of heat exchanger 6 for hot water heating
The temperature near b is high due to the heat from the combustion tube 2b and the radiant heat from the red hot body 3. Therefore, when the condensed water drops fall on the inner bottom surface of the heat exchanger 6 for hot water heating on the side close to the combustion tube 2b, the condensed water evaporates instantaneously while generating a large evaporation sound, giving the user a feeling of anxiety and danger. Had the problem of giving.

When only the radiant heating of the stove is switched after the floor heating operation, the damper 8 closes the branch portion 7a and the circulating pump 11 stops, but the hot water pipe 5 is connected to the combustion tube 2b.
Since it is configured to incline downward as it approaches, water remains in the hot water pipe 5. At this time, the hot water pipe 5 is heated by the heat received from the combustion tube 2b and the red hot body 3 and the high-temperature combustion exhaust gas that flows little by little, and becomes high temperature, and the water remaining in the hot water pipe 5 suddenly makes a loud noise and boils. As described above, there is a problem that the user feels uneasy and dangerous.

[0007]

In order to solve the above-mentioned problems, the present invention is configured such that a hot water pipe in a heat exchanger for hot water heating is inclined in a downward gradient as the distance from the combustion tube increases.

[0008] According to the above invention, even when the dew condensation water or the water in the heat exchange pipe evaporates, even if it is affected by the heat from the combustion tube or the radiant heat from the red heat body, it does not emit a large evaporation sound or a boiling sound. I can do it.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burner, a combustion cylinder disposed above a flame from the burner, a heat exchanger communicating with the combustion cylinder, and a hot water heating system in the interior communicating with the heat exchanger. A hot water heat exchanger having a heat exchange pipe that circulates the liquid.The hot water heat exchanger is located in a substantially horizontal direction near the combustion cylinder, and the internal heat exchange pipe is It is configured to incline downhill as the distance from the vehicle increases.

[0010] According to a second aspect of the present invention, there is provided a burner and a red-hot body provided above the flame from the burner, and the front surface receives light from the red-hot body in front. A combustion tube equipped with heat-resistant glass to be transmitted, a main heat exchanger communicating with the combustion tube and emitting heat for heating by radiation and convection from the surface, and a heat exchange pipe for circulating a hot water heating liquid inside. A hot water heat exchanger having an inlet side that branches off from a communication portion with the main heat exchanger near the combustion cylinder, and an outlet side that is more distant from the combustion cylinder. While communicating with the heat exchanger,
As the heat exchange pipe moves away from the combustion cylinder,
It is configured to incline downhill.

According to a third aspect of the present invention, a heat shield plate is provided in the vicinity of the lowermost portion of the heat exchange pipe inclined downhill so as to face the heat exchanger outlet side. It is.

According to a fourth aspect of the present invention, the bottom surface of the hot water heat exchanger is provided with a groove that is inclined downward as it goes away from the combustion cylinder. belongs to.

According to a fifth aspect of the present invention, there is provided the hot water heat exchanger according to any one of the first, second, third and fourth aspects, wherein a hygroscopic material is laid on at least the lowermost portion of the inner bottom surface. .

According to a sixth aspect of the present invention, a heater for heating the bottom of the hot water heat exchanger is provided on the outer bottom surface or the inner bottom surface of the hot water heat exchanger. And 5.

According to the above invention, when the dew condensation water or the water in the heat exchange pipe evaporates, it is prevented from generating a large evaporation sound or a boiling sound due to the influence of the heat from the combustion tube or the radiant heat of the red hot body. can do.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a sectional view showing an internal structure of a stove with a built-in hot water heat exchanger in Embodiment 1 of the present invention. FIG. 2 is a sectional view showing a hot water heat exchanger portion of the stove with a built-in hot water heat exchanger. FIG. 3 is a sectional view showing an exhaust pipe and an exhaust chamber of the stove with a built-in hot water heat exchanger. FIG. 4 is a perspective view of the main heat exchanger, the hot water heat exchanger, and the hot water unit, in which main parts are cut away. FIG. 5 is a perspective view of a heat exchange pipe of the stove with a built-in hot water heat exchanger. FIG. 6 is an external view of the stove with a built-in hot water heat exchanger.

In FIG. 1, reference numeral 11 denotes an apparatus main body, 12 denotes a burner for burning fuel, 13 denotes a fuel pump for sending fuel to the burner 12, and 14 denotes a blower fan for sending combustion air to the burner 12. Above the burner 12, a combustion tube 16 having a red-hot body 15 inside is connected in series, and a main heat exchanger 17 that generates heat for heating by radiation and convection is connected to the upper portion of the combustion tube. Reference numeral 18 denotes a heat-resistant glass attached to the combustion tube 16,
The light and heat of the red-hot body 15 are radiated to the front of the stove through the opening 19 in the front of the device body 11.

Reference numeral 20 denotes a hot water heat exchanger which is positioned substantially horizontally in the vicinity of the combustion tube 16 and contains a heat exchange pipe 21 for floor heating therein. Branches from the communication part with the exchanger 17 and exits 23
Is communicated with the main heat exchanger 17 on the side away from the combustion tube 16, and the heat exchange pipe 21 is inclined by a pipe holding metal right 24 and a pipe holding metal left 25 so as to be inclined downward as the distance from the combustion tube 16 increases. It is kept.

A damper 27 rotatably supported by a shaft 26 is provided on the inlet side 22 of the hot water heat exchanger 20, and a passage of the combustion exhaust gas is provided to the main heat exchanger 17 or the hot water heat exchanger 20. It is configured to select one of them. Reference numeral 28 denotes a connecting member for moving a shaft supporting the damper 27, and reference numeral 29 denotes a driving motor. 30 is the main heat exchanger 1
An exhaust pipe 31 connected to 7 is an exhaust chamber connected to the exhaust pipe 30, and discharges combustion exhaust gas to the outside through a supply / exhaust tube 32.

Reference numeral 33 denotes a heat exchange hose connecting one end of the heat exchange pipe 21 to a hot water valve return 34 serving as a return port of the hot water, and reference numeral 35 denotes a heat exchange hose connecting the other end of the heat exchange pipe 21 to the water tank 36. -It's going. 37 is the water tank 3
Reference numeral 39 denotes a connection hose for connecting the circulation pump 38 to the circulation pump 38, and reference numeral 39 denotes a hot water hose connection for connecting the circulation pump 38 to a hot water valve outlet 40 which is an outlet of hot water. 41 is the water tank 3
A hot water unit 42 is formed with the water tank 36 and the circulation pump 38 connected by a hot water base integrally provided with the circulation pump 38 and the circulation pump 38. 43 is a floor heating panel.

The operation of the above configuration will be described. First, during simultaneous operation of floor heating and radiant heating from the stove,
The burner 12 starts burning with the liquid fuel sent from the fuel pump 13 and the combustion air sent from the blower fan 14 to generate a flame and a combustion exhaust gas. The combustion exhaust gas first heats the red hot body 15 above the burner 12 to glow red. At this time, the red-hot body 15 radiates the heat and light forward from the heat-resistant glass 18 attached to the combustion tube 16 through the opening 19 on the front surface of the device main body 11. On the other hand, the circulation pump 38 has started to operate for floor heating, and the damper 27 has also turned to the side that opens the inlet side 22 (the state indicated by the solid line in FIG. 1) during floor heating operation.

Therefore, the combustion exhaust gas that has passed through the red hot body 15 is
The heat does not flow into the main heat exchanger 17 above the combustion tube 16, but flows into the hot water heat exchanger 20, and heats a heat exchange pipe 21 for floor heating therein. Heating water (hot water) is flowed by a circulation pump 38, and this water is heated to become hot water, and the water tank 36 is heated.
And then the hot water valve 40
And is sent to the external floor heating panel 43 and returns to the hot water valve return 34 again. The high-temperature flue gas that has passed through the hot water heat exchanger 20 then flows into the main heat exchanger 17 from the outlet side 23, radiates heat from its surface, passes through the exhaust pipe 30, passes through the exhaust chamber 31, and finally passes through. The air is discharged from the supply / exhaust tube 32 to the outside of the room.

During the floor heating operation, the floor heating panel 4
When the temperature of the hot water circulating in the inside 3 rises, the damper 27 turns to the side that closes the inlet side 22 of the hot water heat exchanger 20 (the state of the dotted line in FIG. 1) for controlling the hot water temperature. Damper 2
Reference numeral 7 is made of metal because it is provided in the passage of the combustion exhaust gas, that is, in the high-temperature portion. Therefore, even if the damper 27 closes the inlet side 22, it cannot be completely closed.

Further, since the pressure inside the hot water heat exchanger 20 is lower than that of the main heat exchanger 17, the combustion exhaust gas is gradually removed from the hot water heat exchanger 2 unless the blockage of the inlet side 22 is completed.
Flow into 0. Then, moisture in the flue gas that flows little by little is condensed in the low-temperature portion of the heat exchange pipe 21 through which water flows. The water droplets that have condensed on the surface of the main heat exchanger 21 flow down the heat exchange pipe 21 because the heat exchange pipe 21 is held so as to be inclined downward as the distance from the combustion tube 16 increases. The hot water heat exchanger 17 falls to the inner bottom surface on the side far from the combustion tube 16.

The inner bottom surface of the hot water heat exchanger 20 farther from the combustion cylinder 16 is hardly affected by heat from the combustion cylinder 16 and radiant heat from the red heat body 15 and has an inner bottom surface closer to the combustion cylinder 16. The temperature is considerably lower than the part. Therefore, even if the condensed water drops fall on the inner bottom surface of the hot water heat exchanger 21 on the side farther from the combustion cylinder 16, they do not evaporate instantaneously while generating a large evaporation sound, but evaporate slowly over time. Can be.

Next, when the floor heating operation is stopped from the simultaneous operation of the radiant heating from the stove and the floor heating operation, and the operation is switched to only the radiant heating operation from the stove, the damper 27 closes the inlet side 22. The circulation pump 38 stops. When the circulation pump 38 stops, the water in the heat exchange pipe 21
Although returning to the water tank 36, a small amount of water remains in the heat exchange pipe 21.

As described above, the heat exchange pipe 21 is held so as to be inclined downward as it moves away from the combustion tube 16, so that even if water remains in the heat exchange pipe 21, The heat exchange pipe 21 is hardly affected by the heat from the heat source and the radiant heat from the red heat body 15 and remains in the heat exchange pipe 21 far from the combustion cylinder 16. At the same time, the water in the heat exchange pipe 21 evaporates little by little. Therefore, the configuration is such that the heat exchange pipe 21 does not reach a temperature at which the water in the heat exchange pipe 21 boils while suddenly generating a loud noise in a short time.

In the present embodiment, the combustion tube 16 has the red-hot body 15 and the heat-resistant glass 18. However, even if the combustion tube 16 does not have the red-heat body 15 and the heat-resistant glass 18, the combustion tube 16 can generate high-temperature heat. A similar effect can be obtained.

(Embodiment 2) FIG. 7A is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to Embodiment 2 of the present invention. FIG. 7B is a perspective view showing a state where a heat shield plate provided on a heat exchange pipe portion of the stove with a built-in hot water heat exchanger is attached.

In FIG. 7B, reference numeral 44 denotes a heat shield provided near the lowermost part of the heat exchange pipe 21 which is held so as to be inclined downward as the distance from the combustion tube 16 increases, so as to face the heat exchanger outlet side. It is a plate and is attached to the pipe holding bracket left 25. This heat shield plate 44 is used during a radiant heating operation from a stove that is not performing the floor heating operation.
The combustion exhaust gas flowing in the main heat exchanger 17 is prevented from heating the lowermost inclined portion of the heat exchange pipe 21 from the opening on the outlet side 23.

(Embodiment 3) FIG. 8 is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to Embodiment 3 of the present invention.

In FIG. 8, reference numeral 45 denotes a groove provided on the bottom of the hot water heat exchanger 20 so as to be inclined downward as the distance from the combustion tube 16 increases. Heat exchange pipe 21
The water droplets are held so as to incline downward as the distance from the combustion tube 16 increases, so that the condensed water drops fall on the inner bottom surface of the hot water heat exchanger 21 on the side away from the combustion tube 16. When the condensed water flows into the inner bottom surface of the hot water heat exchanger 20 near the combustion cylinder 16 which is high in temperature due to the influence of the heat from the combustion cylinder 16 and the red hot body 17, it evaporates instantaneously while generating a large evaporation sound. Therefore, the groove 45 prevents the dew condensation water from flowing to the inner bottom surface of the hot water heat exchanger 20 near the combustion tube 16.

Even if water droplets condensed on the surface of the heat exchange pipe 21 fall on the inner bottom surface of the hot water heat exchanger 20 while flowing along the surface of the heat exchange pipe 21, the condensed water remains in the groove 4.
5 can flow to the inner bottom surface on the side away from the combustion cylinder 16.

(Embodiment 4) FIG. 9 is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to Embodiment 4 of the present invention.

In FIG. 9, reference numeral 46 denotes a hygroscopic body made of a hygroscopic material disposed at least at the lowermost part of the inner bottom surface of the hot water heat exchanger 20 having a bottom surface inclined downward as the distance from the combustion tube 16 increases. The heat exchange pipe 21 is held so as to be inclined downward as the distance from the combustion tube 16 increases.
When the condensed water flows down the surface, the condensed water is once absorbed into the moisture absorbing body 46, and the dew water can be gradually evaporated from the surface of the moisture absorbing body 46.

(Embodiment 5) FIG. 10 is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to Embodiment 5 of the present invention.

In FIG. 10, 47 is a hot water heat exchanger 20.
A heating heater provided on the outer bottom surface of the heater.
The surface temperature of the heater 47 is controlled to be 100 ° C. or less,
Moisture in the combustion exhaust gas condensed on the surface of the heat exchange pipe 21 held so as to be inclined downward as it moves away from the combustion tube 16 flows down the surface of the heat exchange pipe 21,
Even if dew water accumulates on the inner bottom surface of the hot water heat exchanger 21, the dew water can be gradually evaporated without boiling immediately.

Although the embodiments 1 to 5 have been described with reference to the heat exchanger that requires floor heating using hot water, the invention is not limited to floor heating, and other heat exchangers may be used. Further, the fuel may be a gaseous fuel instead of a liquid fuel.

[0039]

As is apparent from the above description, according to the stove with a built-in hot water heat exchanger of the present invention, the heat exchange pipe built in the hot water heat exchanger is inclined in a downward gradient as the distance from the combustion tube increases. With this configuration, even if the moisture in the combustion exhaust gas is dewed and falls on the inner bottom surface of the hot water heat exchanger, it does not evaporate while generating a loud noise instantaneously, and the dew water can be gradually evaporated.

Further, even if water remains in the heat exchange pipe, the water in the heat exchange pipe does not suddenly boil while generating a loud noise in a short time, and the dew condensation water can be gradually evaporated.

Further, by providing grooves on the bottom surface of the hot water heat exchanger with a downward slope as the distance from the combustion tube increases, even if moisture in the combustion exhaust gas condenses on the bottom surface of the hot water heat exchanger, As dew condensation water can be guided to the inner bottom surface on the side away from the cylinder, it is possible to prevent the condensation water from evaporating while generating a loud noise under the influence of the high-temperature combustion cylinder and the heat of the red hot body .

Further, by providing a heating heater for heating the bottom portion of the hot water heat exchanger on the outer bottom surface or the inner bottom surface of the hot water heat exchanger, dew condensation water collects on the bottom portion of the hot water heat exchanger. In addition, by controlling the heater temperature to 100 ° C. or less, the dew water can be gradually evaporated, and the dew water can be prevented from evaporating while generating a loud noise.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the internal structure of a hot water heat exchanger built-in stove according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a hot water heat exchanger part of the stove with a built-in hot water heat exchanger.

FIG. 3 is a sectional view showing an exhaust pipe and an exhaust chamber of the stove with a built-in hot water heat exchanger.

FIG. 4 is a cutaway perspective view of a main heat exchanger, a hot water heat exchanger, and a main part of a hot water unit of the stove with a built-in hot water heat exchanger.

FIG. 5 is a perspective view of a heat exchange pipe of the stove with a built-in hot water heat exchanger.

FIG. 6 is an external view of a stove with a built-in hot water heat exchanger.

7A is a cross-sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to a second embodiment of the present invention. FIG. 7B is a heat shield provided in a heat exchange pipe of the stove with a built-in hot water heat exchanger. Perspective view showing the mounting state of the plate

FIG. 8 is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to a third embodiment of the present invention.

FIG. 9 is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view showing the internal structure of a stove with a built-in hot water heat exchanger according to a fifth embodiment of the present invention.

FIG. 11 is a sectional view showing the internal structure of a conventional stove with a built-in hot water heat exchanger.

FIG. 12 is a sectional view showing a hot water heat exchanger part of the stove with a built-in hot water heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Burner 16 Combustion cylinder 17 Main heat exchanger 18 Heat resistant glass 20 Hot water heat exchanger 21 Heat exchange pipe 22 Inlet side 23 Outlet side 27 Damper 36 Miztank 43 Floor heating panel

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kenkichi Hashido 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] A burner, a combustion cylinder disposed above a flame from the burner, a main heat exchanger communicating with the combustion cylinder,
A hot water heat exchanger having a heat exchange pipe that circulates liquid for hot water heating inside the main heat exchanger,
A stove with a built-in hot water heat exchanger, wherein the hot water heat exchanger is located in a substantially horizontal direction in the vicinity of the combustion tube, and the heat exchange pipe inclines downward as the distance from the combustion tube increases. 2. A heat-resistant glass which has a burner and a red-hot body provided above the flame from the burner therein, and has a heat-resistant glass on the front surface for transmitting light from the red-heat body forward. A combustion cylinder, a main heat exchanger communicating with the combustion cylinder and emitting heat for heating by radiation and convection from the surface, and a hot water heat exchanger having a heat exchange pipe for circulating a hot water heating liquid inside. The hot water heat exchanger, the inlet side is branched from a communication portion with the main heat exchanger near the combustion cylinder, and the outlet side is communicated with the main heat exchanger on the side away from the combustion cylinder, A stove with a built-in hot water heat exchanger, wherein the heat exchange pipe is configured to incline downward as the distance from the combustion tube increases. 3. The stove with a built-in hot water heat exchanger according to claim 1, wherein a heat shield plate is provided near a lowermost portion of the heat exchange pipe inclined downwardly so as to face the heat exchanger outlet side. 4. A built-in hot water heat exchanger according to any one of claims 1, 2 and 3, wherein a groove is formed on a bottom surface of the hot water heat exchanger so as to be inclined downward as the distance from the combustion cylinder increases. Type stove. 5. The stove with a built-in hot water heat exchanger according to claim 1, wherein a hygroscopic material is laid at least at a lowermost portion of an inner bottom surface portion of the hot water heat exchanger. 6. A heater according to claim 1, wherein a heater for heating a bottom portion of the hot water heat exchanger is provided on an outer bottom surface or an inner bottom surface of the hot water heat exchanger. A stove with a built-in hot water heat exchanger as described in the item.