JP2009174756A - Solar heat absorbing method and combustion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar heat absorbing method capable effectively suppressing heating and lighting costs, and to provide a combustion device capable of reducing the heating and lighting costs by utilizing the method. <P>SOLUTION: In this solar heat absorbing method, a fluid radiator 81 filled with a fluid is disposed on a window portion of a building or near the window portion, the solar heat is absorbed by the fluid radiator, and the hot water/water in a bathtub 48 is heated by the fluid of which a temperature rises. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method of absorbing and utilizing solar heat using a fluid radiator, and more particularly to a combustion apparatus that can apply heat absorbed using a fluid radiator to bathtub water to save energy.

Conventionally, hot water radiators have been used to improve cold drafts caused by cold air from windows, that is, the difference between floors and ceilings of more than 5 degrees Celsius, and the feeling of cold indoors. Has been.
That is, in patent document 1, it is going to prevent the said cold draft using the thermal radiation part which consists of a hot water radiator which flows the hot and cold water in piping.
This document describes a method of providing a hot water radiator without using an underfloor space or protruding on the floor.

JP 2004-116974 A

  In Patent Document 1, in particular, it is intended to take measures against a cold draft in the sweeping window part. Specifically, the content is that a hot water radiator as a heat radiating part is arranged on the indoor side adjacent floor part of the sweeping window part. To do.

However, such a technique is intended to counter the cold air that enters from the window of the building, and is a countermeasure particularly in winter.
However, the window portion of the building conducts outside heat indoors except in the winter, especially in the summer. As a result, there is a problem that, when cooling is performed using an air conditioner or the like, the indoor cooling efficiency is lowered, and thus there is a problem that the utility cost is increased.

  This invention was made in order to solve the above-mentioned subject, the heat absorption method of the solar heat which enabled it to suppress a utility cost effectively, and the combustion apparatus which can reduce a utility cost using such a method The purpose is to provide.

In the first invention, the object is to arrange a fluid radiator filled with fluid in the window of the building or in the vicinity of the window, absorb the solar heat with the fluid radiator, This is achieved by a solar heat absorption method that heats the hot water in the bathtub.
According to the above configuration, heat is absorbed by the fluid flowing through the fluid radiator via the window portion, so that the interior is not heated by that amount, and the light and heat cost required for indoor cooling can be reduced.
Moreover, since the heat is transferred to the hot water in the bathtub, the fuel cost for raising the bath can be reduced.
In this way, since both the indoor cooling cost and the fuel cost for boiling the bath can be reduced, the effect of reducing the utility cost is great.

Further, in the second invention, the above object is to provide a circulation pipe for drawing and circulating hot water in the bathtub, and combustion for heating the hot water drawn by the circulation pipe through a bath heat exchanger. Means, a fluid radiator disposed in or near the window of the building, and solar fluid absorbed by the fluid radiator, and the fluid whose temperature has risen is passed through the bath heat exchanger and drawn into the circulation pipe This is achieved by a combustion apparatus configured to heat the hot water in the bathtub.
According to the above configuration, by connecting the fluid radiator to a combustion apparatus having a function of boiling a bath, a combustion apparatus capable of using solar thermal energy from the window as part of the energy for boiling the bath is obtained. Can do.

According to a third aspect of the invention, in the configuration of the second aspect of the invention, the fluid radiator is configured to be displaced between a position covering the opening of the window and a position opening the opening.
According to the said structure, only when it wants to absorb the solar heat from a window part, solar heat can be collected on the fluid of a fluid radiator.

According to a fourth invention, in the configuration of any one of the second and third inventions, temperature detection means is provided near the surface of the fluid radiator, and the fluid of the fluid radiator is based on the detected temperature of the temperature detection means. Is configured to be guided to the bath heat exchanger.
According to the above configuration, by detecting the temperature of the fluid radiator itself at or near the window, it is possible to know the temperature of the fluid in the fluid radiator at that time, and when the fluid absorbs sufficient heat, Can be transferred to the hot water side of the bathtub.

According to a fifth aspect of the present invention, in the configuration according to any one of the second to fourth aspects, the bath heat exchanger has a secondary side pipe in which a fluid to the fluid radiator is passed through the primary side pipe and is in contact with the primary side pipe. Further, the hot water of the bathtub drawn in by the circulation pipe is passed through.
According to the above configuration, by completely separating the fluid in the fluid radiator from the hot and cold water in the bathtub on the primary side and the secondary side, dirt on the bathtub, that is, hair and dirt, etc. are mixed in the fluid in the fluid radiator. It can be effectively prevented.

According to a sixth aspect of the present invention, in the configuration of any one of the second to fifth aspects, the return pipe from the fluid radiator is led to the heat exchanger heated by the combustion means and heated. Features.
According to the above configuration, since the fluid flowing through the fluid radiator can be heated, it is possible to take measures against cold drafts by warming the window portion or the vicinity thereof.

According to a seventh invention, in the configuration of the sixth invention, a heat exchanger heated by the combustion means directly enters a primary heat exchanger heated by combustion of the combustion means, and before entering the primary heat exchanger. It is a latent heat recovery heat exchanger that is a secondary heat exchanger that guides the fluid and is heated by the latent heat of the exhaust gas generated by the combustion of the combustion means.
According to the above configuration, by including the latent heat recovery heat exchanger, it is possible to recover the latent heat of the exhaust gas generated by the combustion of the combustion means, and it is possible to more effectively reduce the utility cost.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

FIG. 1 shows an example of a combustion apparatus according to an embodiment of the present invention. In this case, the combustion apparatus 30 is a hot water supply / heating apparatus also serving as a bath in this embodiment.
In the figure, the combustion device 30 has a main body 30-1 made of an equipment case or the like. The combustion device 30 is connected to a bathtub 48 and other heating devices such as a fluid radiator 81 and a floor heating device which will be described later.

A combustion chamber 31 for hot water supply and a combustion chamber 41 for heating (reheating) are provided in the main body 41.
A hot water supply burner 32 and a hot water supply primary heat exchanger 34 are disposed in the hot water supply combustion chamber 31. The hot water supply primary heat exchanger 34 includes a large number of fins. A hot water supply secondary heat exchanger 35 serving as a latent heat recovery heat exchanger for recovering latent heat contained in the exhaust gas in the combustion chamber is disposed at the subsequent stage of the hot water supply primary heat exchanger 34. That is, the hot water supply secondary heat exchanger 35 is provided at a position in contact with the combustion exhaust after the hot water supply primary heat exchanger 34 is heat-exchanged by combustion of the burner 32.

  The clean water that has entered from the water intake pipe 36 is first led to the hot water supply secondary heat exchanger 35, and the hot water that has flowed out of the hot water supply secondary heat exchanger 35 is led to the pipe and directly to the hot water supply primary heat exchanger 34. It enters and is heated by the hot water supply burner 32, and hot water discharged from the hot water supply primary heat exchanger 34 is discharged through a hot water supply pipe 37. The hot water supply pipe 37 is provided with a hot water solenoid valve 23 which is branched from the hot water supply pipe 37. When the hot water solenoid valve 23 is opened, the hot water supply pipe 24 and the heating system 59 are added. Hot water is sent to the circulation circuit.

  The combustion chamber 41 for heating (heating) is provided with a heating (heating) burner (hereinafter referred to as “heating burner”) 42, and a heating primary heat exchanger 44 is disposed at the subsequent stage. Yes. The heating primary heat exchanger 44 also includes a large number of fins. A heating secondary heat exchanger 45 as a latent heat recovery heat exchanger for recovering latent heat contained in the exhaust gas in the combustion chamber is disposed on the heating primary heat exchanger 44.

Further, in FIG. 1, the gas pipe 38 is led to the branch pipe 46 via the original gas solenoid valve 39, and is led to the hot water supply and heating burners 32 and 42, respectively. Each branched gas pipe is provided with a proportional valve, which corresponds to the opening / closing of each solenoid valve for switching the combustion capacity of each burner of the hot water supply burner 32 and the heating (heating) burner 42. The opening degree is adjusted, and necessary fuel gas is supplied.
Further, a hot water supply combustion fan 33 is disposed in front of the hot water supply burner 32, and a heating combustion fan 43 is disposed in front of the heating burner 42 so as to control air necessary for combustion.

Note that a receiving tray 49 as a drain receiving portion is disposed immediately below the hot water supply secondary heat exchanger 35 and the heating secondary heat exchanger 45.
In the tray 49, water vapor present in the combustion exhaust is condensed on the surfaces of the secondary heat exchangers 35 and 45 having a low temperature, and dripped drain (water) is accumulated. This drain contains nitrogen oxides and becomes acidic drain water. This drain is guided to the neutralizer 47 through the drain pipe, neutralized by the neutralizer 47, and drained through the drain pipe.

In this embodiment, the inlet pipe 67 and outlet pipe 68 of the heating primary heat exchanger 44, the inlet pipe 64 and outlet pipe 63 of the heating secondary heat exchanger 45 are a fluid radiator 81 and a heater such as a hot water mat (not shown). Connected to the closed pipe. In other words, the pipe line is filled with a fluid as a heat medium, and water is used here, for example.
A return pipe 72 from the fluid radiator 81 (whose configuration will be described later) is directly connected to the inlet pipe 64 of the heating secondary heat exchanger 45.
The outlet pipe 63 of the heating secondary heat exchanger 45 is connected to a heating cistern 59 which is an air-extracted water storage tank, and the outlet pipe 65 of the cistern is connected to the entrance side of the heating pump 57.
An outlet pipe 77 of the heating pump 57 is branched into a pipe 66 and an inlet pipe 67 of the heating primary heat exchanger 44. The pipeline 66 is connected to, for example, a heating mat or the like via a plurality of drive valve headers, and the flow of fluid exchanged therein is controlled.

The outlet pipe 68 of the heating primary heat exchanger 44 is branched into an inlet pipe 73 of the bath heat exchanger 53 and an outgoing pipe 71 of the fluid radiator 81. The inlet pipe 73 of the bath heat exchanger 53 constitutes the primary side of the bath heat exchanger 53. The outlet pipe 74 of the bath heat exchanger 53 is connected to the return pipe 72 of the fluid radiator 81, and the fluid absorbed by the bath heat exchanger 53 as will be described later is heated by the fluid radiator 81 and heating (hot water mat (not shown)). ) To the return pipe 72.
Here, the bath heat exchanger 53 is formed of a double pipe, and when the inner pipe is the primary side, the outer pipe, which is a secondary pipe covering the outer circumference, is connected to the bathtub 48. It becomes a recirculation circulation line, and the fluid flowing through the primary side and the secondary side is exchanged heat without contact.

That is, the outlet pipe of the outer peripheral pipeline of the bath heat exchanger 53 is a bath outlet pipe 51 that faces the bathtub 48, and is connected to the bathtub 48. The bath-out pipe 51 is provided with a bath-out thermistor 22 so that the temperature of hot water entering the bathtub 48 can be detected.
A bath return pipe 52 extending from the bathtub 48 is connected to the entrance side of the outer peripheral pipeline of the bath heat exchanger 53 via a bath pump 55. The bath return pipe 52 is provided with a reheating flow control valve 54 and a bath water flow switch 56. Further, a bath thermistor 21 that detects the temperature of hot water drawn from the bathtub 48 to the appliance side is set in the bath return pipe 52.
Moreover, the code | symbol 70 of FIG. 1 has shown the control means of the combustion apparatus 30, for example, is a control board built in the instrument. The control means 70 is connected to each controlled component that is controlled according to a predetermined operation sequence in the operation of the combustion device 30.

Next, the fluid radiator 81 will be described with reference to FIG.
In this embodiment, a fluid radiator (hereinafter referred to as “radiator”) 81 is a straight pipe type radiator, and has a configuration in which a fluid serving as a heat medium passes through a tubular radiator body and exchanges heat with its surrounding environment. It is.
Here, in the present embodiment, the radiator 81 may be installed indoors so as to cover the window opening 85 formed on the wall of the building, or may be installed a little away from the window opening 85. .
What is important in the installation of the radiator 81 is that the radiator 81 is installed at a position exposed to sunlight entering from the outside in relation to the opening 85 of the window portion. Thereby, the fluid in the radiator 81 is heated by sunlight. In other words, the radiator 81 needs to be arranged at a location where the fluid in the radiator 81 can absorb the solar heat entering from the window.

In order to perform such a function, the radiator 81 includes, for example, two main bodies 86 and 86 in which two pipes are formed as a pair pipe 84 in the longitudinal direction and a plurality or a plurality of sets are arranged in parallel. Yes.
A fluid is introduced into the pair pipe 84 from the forward pipe 71 extending from the main body 30-1, and returns to the main body 30-1 from the return pipe 72 to the instrument through each pair pipe 84 of each main body 86. Yes.
Further, preferably, each of the main bodies 86, 86 is formed to be displaceable.
For example, the main bodies 86, 86 are provided with support shafts 83, 83 at the upper and lower ends of positions extending in the longitudinal direction of the outer end portions thereof, and are fixed to the bearings (not shown) provided in advance in corresponding portions of the window frame By doing so, it can be displaced by opening and closing like a double door.

In this case, the forward pipe 71 and the return pipe 72 extending from the instrument may be connected to the main bodies 86 and 86, respectively, or when the main bodies 86 and 86 are closed as shown to cover the windows. If a joint that connects one main body 86 and the other main body 86 is provided, the forward pipe 71 and the return pipe 72 extending from the instrument may be connected to only the one main body 86.
Further, a temperature sensor 87 for detecting the temperature of the fluid of the radiator 81 is provided. The temperature sensor 87 is set by selecting a location where the temperature of the fluid in the radiator 81 heated by sunlight is detected in the window, and can be disposed so as to be in contact with the surface of the radiator 81, for example.

FIG. 3 and FIG. 4 are flowcharts showing an operation example when the radiator 81 is operated by the control unit 70 of the combustion apparatus 30.
Here, for example, when the room is cooled in the summer or when the temperature is high, the cooling operation can be reduced by performing the following operation.
First, an operation button or a switch such as a remote controller connected to the control unit 70 of the combustion apparatus 30 is turned on (ST1).
Thereby, the bath pump 55 of FIG. 1 is turned on (ST2).
When the bath pump 55 is driven, the remaining water in the bathtub 48 is drawn into the circulation pipe line formed by the outgoing pipe 51 and the return pipe 52 to the bathtub 48. Then, when the bath water flow switch 56 is turned on for a certain time, the control unit 70 determines that there is residual water in the bathtub 48 and proceeds to ST4.
On the other hand, if the bath water flow switch 56 is not turned on in ST3, the process proceeds to ST11 (described later).

Next, in ST4, the bath thermistor 21 detects the temperature of the residual water in the bathtub drawn into the circulation line (remaining line), and the controller 70 further detects the radiator 81 described in FIG. 2 in ST5. When the detected temperature of the temperature sensor 87 is higher than the detected temperature of the bath thermistor 21, it is determined that the fluid temperature in the radiator 81 is hot by absorbing solar heat, and FIG. The heating pump 57 is driven.
Thereafter, the temperature sensor 87 of the radiator 81 is continuously viewed and the determination of ST5 is continued.
In ST5, when the detected temperature of the temperature sensor 87 is not higher than the detected temperature of the bath thermistor 21, or from the beginning, the detected temperature of the temperature sensor 87 is higher than the detected temperature of the bath thermistor 21. If not, the process proceeds to ST7, the bath pump 55 is stopped, and the elapse of a predetermined time is waited at ST8. When the fluid in radiator 81 has absorbed solar heat after a certain period of time, the above-described processing from ST2 is advanced.

If the bath water flow switch 56 is not turned on in ST3, the remaining water cannot be confirmed in the bathtub 48, and the process proceeds to step 11 in FIG.
Here, the control unit 70 opens the hot water solenoid valve 23 and pours water into the bathtub 48 from both the bath outlet pipe 51 and the bath return pipe 52 without performing combustion (ST11). Here, 10 liters of water is poured first.
Subsequently, the bath pump 55 is driven (ST12), and it is confirmed that the bath water flow switch 56 is turned on (ST13). That is, until it can be confirmed that the bath water flow switch 56 is turned on, the process returns to step 11 and water is repeatedly injected into the water 10 liters. Water injection is repeated until the bathtub water is reliably drawn in relation to the circulation fitting 48a that connects the bath outlet pipe 51 and the bath return pipe 52 to the bathtub 48.

When it is confirmed that the bath water flow switch 56 is turned on, the bath pump 55 is stopped (ST14).
Subsequently, detection of the water level of the bathtub water in the bathtub 48 is started by the water level sensor 78 of FIG. 1 (ST15), and the heating pump 57 is driven while water is poured into the bathtub 48 (ST16). However, at this time, the heating pump 57 is driven so that the circulation flow rate in the additional circulation line is reduced and heat exchange in the bath heat exchanger 53 is appropriately performed (ST17).
Water injection into the bathtub 48 is performed up to the set water level (ST18), and when the set water level is reached, water injection into the bathtub 48 is stopped (ST19).
The bath pump 55 is driven (ST20), the bath water flow switch 56 is confirmed to be turned on (ST21), and if the on signal is not obtained, the process returns to ST16 and water is injected. If the ON signal is obtained, the process returns to ST5 in FIG. 3 and continues to circulate by the heating pump 57 while it is determined that the temperature of the radiator 81 absorbs solar heat from the fluid.

As described above, according to this embodiment, the solar thermal energy from the window portion is obtained by connecting the radiator 81 of FIG. 2 to the combustion device 30 having the function of boiling the bath of FIG. It can be used as part of the energy for boiling the bath.
Then, by absorbing heat to the fluid flowing through the radiator 81 through the window, the interior is not heated by that amount, and the utility cost required for indoor cooling can be reduced.
Moreover, since the heat is transferred to the hot water in the bathtub 48, the fuel cost for scooping up the bath can be reduced.
In this way, since both the indoor cooling cost and the fuel cost for boiling the bath can be reduced, the effect of reducing the utility cost is great.
In addition, the combustion apparatus 30 includes a heat exchanger for recovering latent heat (a hot water supply secondary heat exchanger 35 and a heating secondary heat exchanger 45), so that the latent heat of the exhaust gas generated by the combustion of the combustion means can be reduced. It can be recovered and used for heating hot water, and the utility cost can be reduced more effectively.
Further, in the combustion apparatus 30, the fluid flowing through the radiator 81 can also be heated. Therefore, in a cold season such as winter, the window portion or the vicinity thereof can be warmed to take a cold draft countermeasure.

The present invention is not limited to the embodiment described above.
The combustion device 30 is a combined hot water supply device for bath reheating / heating and hot water supply.
Further, a part of the configuration described in the above embodiment may be combined with another configuration not described above.

The system diagram which shows embodiment of the combustion apparatus of this invention. Explanatory drawing which shows embodiment of the fluid radiator combined with the combustion apparatus of FIG. The flowchart which shows the operation example of the combustion apparatus of FIG. The flowchart which shows the operation example of the combustion apparatus of FIG.

Explanation of symbols

  30 ... Combustion device, 30-1 ... Main body, 31, 41 ... Combustion chamber, 32 ... Hot water supply burner, 34 ... Hot water supply primary heat exchanger, 35 ... Hot water supply secondary heat Exchanger, 36 ... Inlet pipe, 37 ... Hot water supply pipe, 38 ... Gas pipe, 42 ... Heating burner, 44 ... Heating primary heat exchanger, 45 ... Heating secondary heat Exchanger, 48 ... bath, 55 ... bath pump, 57 ... heating pump, 81 ... fluid radiator

Claims (7)

  A fluid radiator filled with a fluid is disposed in a window of a building, in a room, or in the vicinity of the window, the solar heat is absorbed by the fluid radiator, and hot water in the bathtub is heated by the fluid whose temperature has increased. The solar heat absorption method. A circulation line that draws and circulates hot water from the bathtub;
Combustion means for heating hot water drawn by the circulation line through a bath heat exchanger;
A fluid radiator located in or near the window of the building;
A combustion apparatus configured to absorb solar heat by the fluid radiator, pass the fluid whose temperature has risen through the bath heat exchanger, and heat the hot water in the bathtub drawn into the circulation pipe.   The combustion apparatus according to claim 2, wherein the fluid radiator is configured to be displaced between a position covering the opening of the window and a position opening the opening.   The temperature detecting means is provided near the surface of the fluid radiator, and the fluid of the fluid radiator is guided to the bath heat exchanger based on the temperature detected by the temperature detecting means. Or the combustion apparatus in any one of 3.   The bath heat exchanger is configured such that a fluid to the fluid radiator is passed through a primary side pipe, and hot water of a bathtub drawn in by the circulation pipe is passed through a secondary side pipe contacting the primary side pipe. The combustion apparatus according to any one of claims 2 to 4, wherein the combustion apparatus is characterized.   The combustion apparatus according to any one of claims 2 to 5, wherein a return pipe from the fluid radiator is guided to a heat exchanger heated by the combustion means and heated.   A heat exchanger heated by the combustion means guides a primary heat exchanger heated directly by the combustion of the combustion means and the fluid before entering the primary heat exchanger, and with the combustion of the combustion means The combustion apparatus according to claim 6, wherein the combustion apparatus is a latent heat recovery heat exchanger that is a secondary heat exchanger heated by the latent heat of the generated exhaust gas.

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