JP2000121058A - Combustion type kitchen range and hot water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a kitchen range which can be used comfortably in safety without requiring any ventilation of room while facilitating maintenance and in which a heat source is shared between the kitchen range and a hot water supply apparatus. SOLUTION: The kitchen range 1 comprises a burner 2, a radiator 3 being heated with combustion gas exhausted from the burner 2, a main container 4 for containing the burner 2 and the radiator 3 in a space enclosed against the room, and an air supply/exhaust means 5 comprising an exhaust passage 5b communicating with the main container 4 and discharging combustion gas of the burner to the outside and an air supply passage 5a for sucking combustion air of the burner 2 from the outside. Heat exchanger 21 for hot water supply apparatus is disposed in the exhaust passage 5b of the kitchen range 1 and hot water heated by the heat exchanger 21 is stored in a hot water storage tank 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion stove and a hot water supply system, and more particularly, to a stationary combustion stove for cooking installed in a kitchen or the like, and a hot water supply using the stove and a heat source in common. About the system.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional structure of a cooking stove (hereinafter referred to as "stove") for cooking used in a kitchen or the like. The stove shown in FIG. 8 includes a burner a that uses gas as a fuel, and a burner (not shown) for holding a body to be heated b such as a pan above the burner a at an appropriate interval. The main body c is configured to include a main body c for accommodating a. Reference numeral d denotes a gas pipe that supplies gas serving as fuel to the burner a.

[0003] The heating of the object to be heated b in such a stove is performed by igniting the burner a with the object to be heated b placed on the above-mentioned virtue. (Refer to the symbol F in FIG. 8 indicating the state of the combustion gas (flame) at that time).

[0004]

However, the above-described conventional stove has various problems as listed below, and improvement thereof has been desired.

(1) Indoor ventilation is required when using the stove. In other words, the above-mentioned conventional stove employs a configuration in which the combustion gas of the burner is directly applied to the surface of the body to be heated when heating the body to be heated, so that the flame of the burner has its tip before the combustion is completed. Is hit by the body to be heated and is cooled, resulting in less than ideal combustion. As a result, incomplete combustion gas such as hydrocarbon (HC) and carbon monoxide (CO) is generated, while Bunsen combustion is used as a burner combustion method. Since the method is adopted, generation of nitrogen oxides (NOx) cannot be sufficiently suppressed.

On the other hand, in the conventional stove, the combustion gas after heating the body to be heated is discharged into the room without taking any special recovery measures (see arrows in FIG. 8). If the stove is not sufficiently ventilated, the incomplete combustion gas and nitrogen oxides may cause deterioration of the indoor environment, and as a result, the occupants may experience poisoning symptoms due to the incomplete combustion gas and the like. There was a risk of causing.

In addition, since the conventional stove uses room air as combustion air, there is a risk that the stove will fall into an oxygen-deficient state (oxygen-deficient state).

(2) It has been troublesome to maintain a good use environment of the stove, such as measures to block the crater. That is, in the conventional stove, the gas injection port (crater) of the burner is usually provided to be exposed to the outside as shown in FIG. 8, so that the crater is closed due to boiling over from the body to be heated. There is a risk of extinction. In addition, even if there is no such spill, the crater is apt to adhere with dirt and dust, so in order to always maintain a good combustion state, the crater must be frequently cleaned. Maintenance
Was troublesome.

(3) The combustion noise when using the stove was noisy. That is, in the conventional stove, since the crater of the burner is provided to be exposed to the outside, the combustion noise when the stove is used can be directly heard. For this reason, when the heating power of the stove is increased, the noise caused by the combustion increases, which is annoying to the stove user.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a device which can be used safely without requiring indoor ventilation, and which is easy to maintain and can be used comfortably. The main object of the present invention is to provide a hot water supply system, and further, to provide a hot water supply system that has not existed so far and has a common heat source for a hot water heater and a hot water supply device.

[0011]

In order to achieve the above object, a combustion type stove according to the present invention comprises a burner, a radiator heated by the combustion gas of the burner, and both the burner and the radiator. And a supply / exhaust means communicating with the main body container to discharge the burner gas from the burner to the outside and suck the combustion air from the burner from the outside. The object to be heated is heated by radiant heat from the radiator.

That is, according to the combustion type stove according to the present invention, the burner serving as the heat source of the stove is accommodated in the main body container which is hermetically closed to the room, and the air required for combustion of the burner is burned. Since the intake and exhaust of the combustion gas after combustion are performed by air supply / exhaust means communicating with the outside, even when the stove is used, the air used for combustion is exclusively taken in only from the outside, and the combustion gas is discharged. All are discharged outside without being discharged indoors. Therefore, in the room where the stove is installed, there is no adverse effect (burn of incomplete combustion gas or generation of oxygen deficiency) due to the combustion of the burner, and the heating of the object to be heated is caused by radiant heat from the radiator. Since the heating is performed, the object to be heated is heated while the indoor environment is kept clean.

As a preferred embodiment of such a stove, a combustion chamber having the burner built therein and having an opening for discharging combustion gas is provided inside the main body container. And a convection path for the combustion gas is formed between the convection path and the exhaust path of the air supply / exhaust means. The air supply path of the air supply / exhaust means is communicated with the air supply port of the burner. It is constituted by doing.

In this case, the combustion gas from the combustion of the burner flows from an opening provided in the combustion chamber into a convection path formed between the main body container and the combustion chamber, circulates in the convection path, and then supplies and exhausts. It is discharged outside from the exhaust path of the means. Therefore, according to this embodiment, during combustion of the burner, high-temperature combustion gas convects around the combustion chamber, and the temperature of the combustion gas increases the temperature in the combustion chamber to a high temperature (more than the self-ignition temperature of fuel). (High temperature), so that so-called high-temperature air combustion can be realized. In other words, in this embodiment, high-temperature air combustion is performed in the cooking stove by raising the temperature in the combustion chamber by using the residual heat of the combustion gas discharged after heating the radiator. is there. In this case, it is preferable that the opening provided in the combustion chamber is formed at least on the upper end face of the combustion chamber in order to efficiently perform the convection of the combustion gas.

By the way, high-temperature air combustion in such a combustion stove is realized by convection of high-temperature combustion gas around the combustion chamber by combustion of a burner as described above. It takes a certain amount of time to raise the temperature of the room to the self-ignition temperature of the fuel. Therefore, it is preferable that the combustion type gas stove of the present invention is provided with air preheating means for heating the air in order to promote the temperature rise in the combustion chamber.

Specifically, as the air preheating means, for example, a pair of ventilating preheating regenerators arranged facing the combustion chamber, and the preheating regenerators are connected to each other to interconnect the preheating regenerators. An air circulation pipe that connects the pair of preheating regenerators and the combustion chamber to form an air circulation path; and the air supply pipe that is connected to the air supply path and provided in the air circulation pipe. It is preferable to provide an air supply destination switching means for alternately supplying combustion air supplied from the path to the pair of preheating regenerators.

That is, in this case, the air for combustion supplied from the air supply path is alternately switched and supplied to the pair of preheating regenerators by the air supply destination switching means, so that the pair of preheating regenerators is connected to the pair of preheating regenerators. Air circulation in different directions is alternately generated in an air circulation path constituted by the combustion chamber and the air circulation pipe (see arrows b and c in FIG. 7). In this embodiment, by igniting the burner in this state, the pair of preheating regenerators are alternately heated with the combustion gas in the combustion chamber heated by the combustion of the burner. The combustion air supplied from the passage passes through the heated preheating regenerator and is supplied into the combustion chamber. Accordingly, the combustion air supplied from the air supply path is heated when passing through the preheating regenerator and is supplied to the combustion chamber, and is coupled with the heating by the combustion gas circulating through the convection path. The temperature rise in the combustion chamber is promoted, and as a result, the high-temperature air combustion can be quickly realized.

[0018] In another embodiment of the present invention, a convection path formed between the combustion chamber and the main body container is communicated with an air supply port of the burner. A configuration may be employed in which a part of the combustion gas circulating in the inside is circulated and supplied to the air supply port of the burner.

That is, in this embodiment, part of the combustion gas once burned in the combustion chamber during the high-temperature air combustion is recirculated to the burner again, so that the combustion air taken in from the air supply port of the burner is Therefore, the fresh combustion air sucked from the outside and the recirculated combustion gas are mixed, and as a result, the oxygen concentration of the combustion air supplied as the primary air of the burner becomes the above-described recirculation. The concentration becomes lower (hypoxic state) as compared with the case where no is performed. As a result, in this embodiment, the high-temperature air combustion can be performed in a low-oxygen state, whereby the generation of nitrogen oxides generated by the combustion can be suppressed.

In any of the above-mentioned stoves according to the present invention, the main body container has a heat-insulating structure, and a heat-resistant glass is disposed on the upper end surface thereof, and the radiant heat of the radiator is transmitted through the heat-resistant glass. It is preferable to be configured to radiate to the object to be heated, and a heat storage is provided between the burner and the radiator, and the radiator is configured to be heated by radiant heat from the heat storage. Is preferred.

On the other hand, a hot water supply system according to the present invention is a hot water supply system using the above-mentioned stove, wherein at least a heat exchanger is provided in an exhaust passage of a supply / exhaust means of the combustion type stove. It is characterized in that hot water storage means for storing hot water heated by the heat exchanger is provided.

That is, in the above-described stove according to the present invention, all or most of the combustion gas after heating the radiator is discharged outside through the air supply / exhaust means. However, since the combustion gas discharged to the outside is still in a high temperature state, the hot water supply system of the present invention uses the discharged high temperature combustion gas as a heat source of the heat exchanger and is heated by the heat exchanger. Hot water is stored in the hot water tank of the water heater. The hot water stored in the hot water storage tank can be widely used for hot water supply, hot water supply heating, hot water for reheating a bath, and the like, similarly to a normal hot water supply system.

[0023] In the hot water supply system configured as described above, it is preferable that the combustion stove constituting the system includes a heat shutoff mechanism configured to shut off radiant heat from the radiator.

That is, in the hot water supply system according to the present invention, since the heat source of the stove and the heat source of the water heater (hot water storage means) are shared, the burner is in a combustion state when hot water is supplied to the hot water storage means. It is said. Therefore, in this case, the radiator will be heated even if the stove is not used.In the hot water supply system of the present invention, in such a case, the radiant heat from the radiator is prevented from leaking to the outside. Is preferably provided with a heat cutoff mechanism.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a combustion stove and water heater system according to the present invention will be described below in detail with reference to FIGS.

Embodiment 1 First, FIG. 1 shows an embodiment of a combustion stove according to the present invention.

A cooking stove 1 shown in FIG. 1 is a cooking stove used by being fixedly installed in a cooking place such as a kitchen, for example, and is heated by a burner 2 and combustion gas of the burner 2. Radiator 3 and a main body container 4 for accommodating both the burner 2 and the radiator 3 in a space closed to the room.
And a supply / exhaust means 5 which communicates with the main body container 4 to discharge the combustion gas of the burner 2 to the outside and sucks the combustion air of the burner 2 from the outside as a main part.

In FIG. 1, reference numeral W denotes a wall material that separates a cooking area (indoor) from the outside (outdoor), and reference numeral A denotes a member to be heated by the stove 1. (A pan in the illustrated example).

The stove 1 further includes a combustion chamber 6 inside the main body container 4, and the convection path (combustion gas) of the combustion gas between the combustion chamber 6 and the container main body 4 by the combustion chamber 6. A gas circulation space 7 is formed. The burner 2 is disposed at a lower end portion in the combustion chamber 6, and a heat storage body 8 that stores heat of a high-temperature combustion gas generated by combustion of the burner 2 is disposed above the burner 2. .

More specifically, the burner 2 is a gas burner using gas as a fuel. In the present embodiment, a high-temperature air burner for performing high-temperature air combustion can be suitably used.

That is, in the present embodiment, as described later, the combustion gas generated by the combustion of the burner 2 is supplied to the combustion chamber 6.
Is configured to be discharged to the outside from the supply / exhaust means 5 via the convection path 7 formed around the
Once the combustion in the burner 2 is started, the temperature inside the combustion chamber 6 reaches the self-ignition temperature (the temperature equal to or higher than the ignition point) of the gas serving as fuel due to the convection of the combustion gas, and is suitable for performing high-temperature air combustion. Environment is formed.

For this reason, in the present embodiment, a high-temperature air burner capable of realizing high-temperature air combustion is employed as the burner 2 installed in the combustion chamber 6, but it is needless to say that a normal-type gas burner is used. However, the present invention can be implemented. Reference numeral 9 in the figure denotes a gas pipe 9 for supplying gas as a fuel to the burner 2.

The radiator 3 transmits the heat generated by the combustion of the burner 2 to the body A to be heated as radiant heat. The radiator 3 is made of a heat-resistant material such as a plate-shaped ceramic. Be composed. The radiator 3 is disposed between the main body container 4 and the combustion chamber 6, and is configured to be heated by the radiant heat from the heat storage body 8 described above.

The heat storage body 8 directly absorbs heat from the combustion gas of the burner 2 and is disposed above the combustion chamber 6 so as to face the burner 2. The heat storage body 8 is made of a material having excellent heat resistance and a heat storage action. In the present embodiment, a massive member made of ceramic is employed. It is not limited to the illustrated example. Further, the heat storage body 8 in the present embodiment is formed of a ceramic having a density higher than that of the ceramic used for the radiator 3 such as a sponge-like ceramic having voids so that the combustion gas can pass through the inside of the heat storage body 8. It is preferably used.

The main body container 4 is a container for accommodating the radiator 3 and the combustion chamber 6 including the burner 2 and the heat storage body 8, and the combustion gas circulating through the convection path 7 leaks into the room. It is a closed structure so that there is no.

Specifically, the outer wall of the main body container 4 is made of a metal member, and the heat of the combustion gas flowing through the convection path 7 formed inside the main body container 4 does not leak to the outside. Insulation treatment such as interposition of a heat insulating material is applied to the heat sink. A part of the upper end surface 4a is opened, and the heat-resistant glass 10 is mounted in the opening 4b.

The radiator 3 is arranged inside the heat-resistant glass 10, and the radiant heat from the radiator 3 is applied to the object A through the heat-resistant glass 10. In the illustrated example, what is indicated by the reference numeral 11 is a method for holding the object to be heated A on the heat-resistant glass 10 at regular intervals.

The supply / exhaust means 5 is for supplying combustion air to the burner 2 while discharging the combustion gas circulating in the main body container 4 to the outside. An air supply path 5a and an exhaust path 5b are individually provided, and both of them penetrate the wall material W and are open to the outside atmosphere.

Specifically, the supply / exhaust means 5 includes:
For example, a pipe having a double structure in which an exhaust pipe 13 is inserted inside an air supply pipe 12 is preferably used. This is because the pipe 13 heated by the heat is not exposed to the outside because the combustion gas flowing in the exhaust passage 5b has a high temperature.

One end of an air supply pipe 12 is connected to an air supply port (not shown) of the burner 2 to supply combustion air from outside, and one end of an exhaust pipe 13 is connected to the burner 2. The convection passage 7 is provided so as to penetrate the outer wall portion of the main body container 4 and communicate with the convection passage 7 so that the combustion gas flowing through the convection passage 7 can be discharged outside.
In the illustrated example, one end of the air supply / exhaust means 5 is opened to the atmosphere, but the air supply / exhaust means is provided with a fan device for forcibly performing both air supply and exhaust. Is preferred.

On the other hand, the combustion chamber 6 is a combustion chamber for performing the above-described high-temperature air combustion, and is composed of a metal container containing the burner 2 and the heat storage body 8 therein. That is, the combustion chamber 6 is provided with a convection path 7 formed therearound.
Since it is necessary to maintain the inside of the combustion chamber 6 at a high temperature by the heat of the combustion gas flowing through the inside, a metal material having a high thermal conductivity and excellent heat resistance is suitably used as a material constituting the combustion chamber 6. You.

The combustion chamber 6 has at least an upper end surface 6a opened, and the heat storage body 8 and the radiator 3 are arranged inside and outside the combustion chamber 6 so as to sandwich the opening 6b. In other words, the heat storage body 8 and the radiator 3 are provided at positions facing each other with the opening 6b interposed therebetween.
The heat stored in the heat storage body 8 can be transmitted as radiant heat to the radiator 3 through the opening 6b.

Further, as described above, in the present embodiment, since the ceramic having a high density is employed as the material used for the heat storage body 8, the combustion gas ascends from the burner 2 hits the heat storage body 8 and hits the combustion chamber 8 when rising from the burner 2. In addition to circulating through the inside of the radiator 6, a part of the radiator 3 is directly blown onto the radiator 3 through the heat storage body 8. That is, the radiator 3
The radiator 3 is configured to be directly heated not only by the above-described radiant heat from the heat storage unit 8 but also by the combustion gas passing through the heat storage unit 8, thereby enabling the radiator 3 to be efficiently heated in a short time. ing. The combustion gas thus directly blown onto the radiator 3 is guided to the exhaust path 5b via the convection path 7.

In the above-described illustrated example, the heat storage body 8 is arranged in close contact with the upper part of the combustion chamber 6, but, for example, the position of the heat storage body 8 is slightly shifted downward, or It is also possible to provide a structure in which the combustion gas in the combustion chamber 6 is positively guided to the convection path 7 by providing an opening on the side surface of the convection path.

The operation principle of the above-structured stove 1 will now be described.

Heating Principle of Heated Object A : (1) First, the heated object A to be heated is placed on the gorge 11 and the stove 1 (not shown) is placed in this state.
Is operated to operate the burner 2.

(2) When the burner 2 is ignited, high-temperature combustion gas is generated by burning the fuel gas in the burner 2, and the combustion gas is located above the burner 2 by convection due to heat. Is sprayed on the lower end surface of the heat storage body 8.

(3) The regenerator 8 to which the combustion gas of the burner 2 has been directly blown is directly heated by the high-temperature combustion gas. When the temperature of the heat storage element 8 rises to a certain degree, radiant heat is generated from the surface of the heat storage element 8, and the radiant element 3 disposed opposite to the heat storage element 8 is heated by the radiant heat.

(4) At this time, in the present embodiment, since ceramic having a high density is employed as the material of the heat storage body 8, a part of the combustion gas blown to the heat storage body 8 The radiator 3 passes through the opening 6b formed in the upper end surface 6a of the combustion chamber 6 and is blown to the lower end surface of the radiator 3, so that the radiator 3 is also heated by the combustion gas.

(5) When the radiator 3 is heated as described above, radiant heat is generated from the radiator 3 this time. In the present invention, the radiant heat from the radiator 3 is
The heating target A is heated by irradiating the lower end surface of the heating target A via the.

Combustion of burner 2 and supply and exhaust of combustion gas
Principle : As described in the above (4) of the heating principle, in this embodiment, a part of the combustion gas of the burner 2 is blown to the radiator 3 through the regenerator 8. The combustion gas blown to the radiator 3 is guided to the convection path 7 without passing through the radiator 3 having a high density.

Since the convection path 7 is formed on the outer periphery of the combustion chamber 6 as described above, the combustion gas guided into the convection path 7 is distributed around the combustion chamber 6 along the shape of the convection path 7. (Refer to the symbol a in the figure), and is guided to the exhaust path 5b communicating with the convection path 7 and discharged outside.

By the way, the combustion gas circulating in the convection path 7 consumes heat in the regenerator 8 and the radiator 3, but the temperature during circulation is still high. The temperature in the combustion chamber 6 is increased by the temperature of the gas. For example, assuming that the temperature of the combustion gas is about 1200 ° C. to 1300 ° C., the temperature of the combustion gas circulating in the convection path 7 is 1100 ° C. to 1200 ° C. even when the heat consumed by passing through the regenerator 8 is considered. It will be about high temperature. Therefore, the temperature inside the combustion chamber 6 is raised to a temperature equal to or higher than the auto-ignition temperature of the gas serving as the fuel by the combustion gas circulating through the convection path 7.

In other words, once the burner 2 is ignited and the combustion gas flows out into the convection path 7, the combustion is continued thereafter, so that the temperature in the combustion chamber 6 is maintained at the self-ignition temperature or higher. The combustion chamber 6 is ready for high-temperature air combustion. Therefore, in this embodiment, high-temperature air combustion is performed in the combustion chamber 6 by maintaining such an environment by convection of high-temperature combustion gas.

When the high-temperature air combustion is performed in this manner, the high-temperature air combustion cannot be immediately performed because the temperature in the combustion chamber 6 is low at the beginning of the ignition of the burner 2. Therefore, it is preferable that the combustion type stove 1 according to the present invention is provided with an air preheating means for heating the air in order to promote the temperature rise in the combustion chamber 6.

As the air preheating means, for example, as shown in FIG. 7, a pair of air preheating regenerators 101a and 101b arranged facing the combustion chamber 6 are provided.
By connecting these preheating heat storage bodies 101a and 101b to each other, the pair of preheating heat storage bodies 101a and 101b is connected.
b and the combustion chamber 6 are communicated with each other to form an air circulation path 102, and the air supply path 5a is connected to the air supply path 5a and provided in the air circulation pipe 102 and the air supply path Air supply destination switching means 103 for alternately supplying the combustion air supplied from 5a to the pair of preheating regenerators 101a and 101b is provided.

Specifically, the heat storage element 101 for preheating includes:
It is a member for heating the combustion air supplied into the combustion chamber 6, and is disposed to face the lower part of the combustion chamber 6 so as to sandwich the burner 2. The preheating heat storage body 101 is preferably made of a ceramic having a higher density than the heat storage body 8, for example, a ceramic having a grid or the like through which air can easily pass.

An air circulation pipe 102 for interconnecting the pair of preheating regenerators 101 is a pipe for connecting the preheating regenerators 101a and 101b so that air can be circulated. The air supply destination switching means 103 is provided in the piping route.

The air supply destination switching means 103 alternately supplies the combustion air supplied from the air supply passage 5a to the pair of preheating regenerators 101a and 101b. The destination switching means 103 includes
An air supply pipe 102a communicating with the air supply path 5a,
An exhaust pipe 102b communicating with the exhaust path 5b is connected.

In the configuration having the air preheating means configured as described above, when the burner 2 is ignited, the inside of the combustion chamber 6 is heated as follows.

First, assuming that the air supply destination switching means 103 supplies air to the preheating regenerator 101a side, the combustion air supplied from the air supply passage 5a is supplied by an arrow shown in FIG. As shown by the symbol b (solid line), the air supply path 5
a, air supply destination switching means 103, preheat regenerator 101
a, the combustion chamber 6, the preheating regenerator 101b, the air supply destination switching means 103, and the exhaust path 5b circulate in the order of the circulation path. The air circulated from the preheating regenerator 101a into the combustion chamber 6 by this circulation is burned by the burner 2 in the combustion chamber 6 and the other preheating regenerator 101b
And heats the preheating regenerator 101b when passing through the preheating regenerator 101b.

Next, the air supply destination switching means 1
When 03 is switched to the preheating regenerator 101b side, the air supply path 5a, the air supply destination switching means 103, and the preheating regenerator, as shown by an arrow c (dotted line) in FIG. 101b, a combustion chamber 6, a preheat regenerator 101a,
Air is circulated in the order of the air supply destination switching means 103 and the exhaust path 5b. As a result, the air supplied from the air supply path 5a to the combustion chamber 6 is heated when passing through the preheating regenerator 101b heated by the previous circulation cycle, and is further heated in the combustion chamber 6 to be preheated. Heat storage body 101a
After heating the preheating regenerator 101a as described above, the preheating regenerator 101a is circulated to the exhaust path 5b.

Thereafter, such a circulation cycle is alternately repeated, so that the preheating regenerators 101a, 101b
Are gradually increased, and with this temperature increase, the temperature of the air flowing into the combustion chamber 6 from the air supply path 5a is increased.

That is, in the combustion type stove 1 of the present invention, the heating of the combustion chamber 6 by the air preheating means is performed, so that the heating by the combustion gas circulating through the convection path 7 is performed. Heating in the inside 6 is promoted, and high-temperature air combustion is realized in a short time from the ignition of the burner 2.

The primary air required for the combustion of the burner 2 is supplied directly to the burner 2 via the air supply path 5a communicating with the outside.

As described above, according to the invention shown in this embodiment, the combustion of the burner 2 at the time of heating the object to be heated A is so-called high-temperature air combustion. A large increase in the flame capacity can be expected by diffusion combustion at the same time. In addition, since the inside of the combustion chamber 6 becomes uniform and high in temperature, the temperature of the heat storage body 8 becomes high, and an increase in the output of the stove 1 can be expected. Since the heating is completed in the combustion chamber 6 accommodated in the heating chamber 4, the heating of the object to be heated A can be realized without generating a combustion noise like a conventional stove, and in addition, since the combustion is performed with a low oxygen concentration. Various advantages are obtained such that generation of nitrogen oxides can be suppressed.

On the other hand, the combustion of the burner 2 and the circulation of the combustion gas are all carried out in a space (within the main body container 4) which is hermetically closed to the room, and the combustion gas is passed through the exhaust path 5b to the outside. Since the air is discharged into the room, it is possible to use the stove while always maintaining a good indoor environment without polluting the indoor air.

Further, since the heating of the object to be heated A itself is caused by the radiant heat from the radiator 3, there is no fear of extinction due to boiling over as in a conventional cooking stove, and furthermore, since the burner 2 is not exposed to the outside, there is no dust. Burner 2 due to dust and dust adhesion
The occurrence of abnormal ignition can be reduced, and maintenance is easy.

Embodiment 2 Next, FIG. 2 shows a second embodiment of the present invention. The second embodiment is configured such that part of the combustion gas circulating in the convection path 7 in the first embodiment is circulated and supplied again to the air supply port of the burner 2 as combustion air for the burner 2. The other configuration is the same as that of the first embodiment except that the convection path 7 is communicated with the burner 2 as compared with the first embodiment. Therefore,
The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted (the same components are denoted by the same reference numerals in other embodiments, and description thereof is omitted).

That is, the stove 1 according to the second embodiment
In the embodiment, an opening 14 is formed at one end of the air supply path 5 a so that the end side (downstream side in the convection direction) of the convection path 7 communicates with the air supply port of the burner 2.

Thus, a part of the combustion gas circulating in the convection path 7 is taken into the air supply port of the burner 2 from the opening 14 and mixed with the combustion air supplied from the air supply path 5a. Since the burner 2 is used as the combustion air in the burned state, the combustion in the burner 2 can be performed with lower oxygen than in the case of the first embodiment.

In the illustrated example, the intake of the combustion gas is performed only through the opening 14 for convenience of explanation. However, for example, a mechanism capable of adjusting the intake amount of the combustion gas is provided in the opening 14. It is preferable that the mixing ratio of the combustion gas and the combustion air supplied to the burner 2 can be adjusted.

As described above, according to the present embodiment, in addition to the effect obtained in the first embodiment, the combustion of the burner 2 is performed in a low oxygen concentration state. There is an advantage that generation of (NOx) can be suppressed.

Embodiment 3 Next, a hot water supply system according to the present invention will be described with reference to FIG.

The hot water supply system shown in FIG. 3 uses the heat of the combustion gas discharged from the supply / exhaust means 5 to boil the hot water in the hot water heater 1 shown in the second embodiment, and stores the hot water in the hot water storage means. A hot water supply system for supplying hot water, hot water supply and heating, and further as hot water for reheating a bath is shown.

More specifically, the hot water supply system includes the heat shut-off mechanism 20 and the heat exchanger 2 in the stove 1 shown in the second embodiment.
1, while a hot water storage tank 22 communicating with the heat exchanger 21 and a control means 23 for controlling these systems are provided as hot water storage means.

The heat shut-off mechanism 20 is a heat shut-off mechanism for preventing radiant heat from the radiator 3 from passing through the heat-resistant glass 10, and based on a control command from the control means 23. Blocking / passing is controllable. Specifically, for example, the heat-resistant glass 10 is constituted by a reflector or a heat insulating material which is opened and closed by a driving mechanism (not shown). Has been prevented.

The heat exchanger 21 is a heat exchanger disposed in the exhaust path 5b of the supply / exhaust means 5, and is constituted by a well-known heat exchanger such as a copper fin pipe type heat exchanger. I have. Specifically, the heat exchanger 21 is provided with an outgoing pipe 24 and a return pipe 25 communicating with the hot water storage tank 22, and the return pipe 25 is provided with a circulation pump 26. Thereby, the hot and cold water stored in the hot water storage tank 22 is driven by the circulation pump 26 to return the return water 25 from the going pipe 24 via the heat exchanger 21.
A hot water circulation path is configured to return to the hot water storage tank 22 again.

The hot water storage tank 22 is a tank for storing the hot water heated by the heat exchanger 21. The hot water storage tank 22 has a water supply pipe 27 connected to a water source and supplying water into the tank. A hot water supply pipe 28 is provided for supplying hot and cold water in the hot water storage tank 22 to a hot water supply curl and a hot water heating piping path (not shown). The hot water storage tank 22 includes a temperature sensor (not shown) for detecting the temperature of hot water in the tank.

The control means 23 is composed mainly of predetermined software for controlling the entire system and a microcomputer. And this control means 2
3 monitors the water temperature in the hot water storage tank 22 with at least the temperature sensor, controls the combustion of the burner 2 so that the water temperature in the hot water storage tank 22 becomes a predetermined temperature (set temperature), and As will be described later, the state of the stove 1 is monitored to control the opening / closing operation of the heat shutoff mechanism 20.

The hot water supply system configured as described above is controlled by the control means 23 as follows.

(1) That is, when the power of the hot water supply system is turned on, regardless of the operation state of the water heater (the state of tapping of the tapping pipe 28), the temperature in the hot water storage tank 22 detected by the temperature sensor is determined. It is determined whether the temperature has reached the predetermined set temperature.

(2) Then, when it is determined that the temperature in the hot water storage tank 22 has not reached the set temperature, the control means 23 next determines the use condition of the stove 1 (while the heating target A is being heated). Or not) is determined.

(3) If it is determined that the stove 1 is not in use (that is, not in a heating state), the control means 23 issues a combustion start command to the burner 2 and a drive start command to the circulation pump 26. In parallel with these instructions, a command to cut off the radiant heat is issued to the heat cutoff mechanism 20 of the above-mentioned stove 1 so that the ignition of the burner 2, the driving of the circulation pump 26 and the heat cutoff operation of the heat cutoff mechanism 20 are performed. Each is started.

(4) Then, the combustion gas generated by the ignition of the burner 2 heats the radiator 3 in accordance with the above-described operation, and is then guided to the exhaust path 5b via the convection path 7; In the embodiment, since the heat exchanger 21 is disposed in the exhaust path 5b, the heat of the combustion gas guided to the exhaust path 5b is transferred to the hot water storage tank 22 by the heat exchanger 21.
It is consumed to boil the water inside.

At this time, the radiant heat generated by heating the radiator 3 is cut off by the heat cutoff mechanism 20 as described above, so that heat does not leak out from the heat resistant glass 10 to the outside.

(5) Thus, the heat exchanger 2
1, the hot water in the hot water storage tank 22 is boiled,
When the internal temperature rises to the set temperature, the control means 23
, The fire extinguishing of the burner 2, the driving stop of the circulation pump 26, and the opening operation of the heat shutoff mechanism 20 are respectively instructed. It is needless to say that the opening operation of the heat shutoff mechanism 20 at that time is preferably commanded after the radiation heat from the radiator 3 is reduced in view of safety measures of the device.
More specifically, for example, if the heating operation of the object to be heated A is performed in the stove 1 during the shutoff operation of the heat shutoff mechanism 20, a command to open the heat shutoff mechanism 20 is issued from the control means 23. Is natural in view of the purpose of use of the stove 1.

As described above, according to the present embodiment, the hot water in the hot water storage tank 22 is heated by the heat exchanger 21 provided in the exhaust path 5 b of the hot water stove 1.
During use, the combustion gas that has been exhausted without being reused can be used for heating the hot water storage tank 22, so that the energy use efficiency can be improved.

Embodiment 4 Next, another embodiment of the hot water supply system of the present invention will be described with reference to FIG.

In the hot water supply system shown in FIG. 4, the hot water storage tank 22 of the hot water supply system shown in the third embodiment is constituted by a plurality of hot water storage tanks. Specifically, in the illustrated example, two large and small hot water storage tanks 22a and 22b having different capacities are provided, and the outgoing pipe 24 and the return pipe 25 are respectively branched on the way and connected to the hot water storage tanks 22a and 22b. Have been. At this branch point, valve devices 29, 29 configured to be controllable by the control means 23 are provided, and the hot water storage tanks 22a, 22b communicated with the heat exchanger 21 by the valve device 29. (Selection of one or both) is possible.

Thus, in the hot water supply system configured as described above, the switching operation of the valve device 29 by the control means 23 is performed, for example, as shown in the flowchart of FIG. 5 described below.

That is, when the power of the hot water supply system is turned on (step S1 in FIG. 5), regardless of the operating state of the water heater (the tapping state of the tapping pipe 28) (step S2 in FIG. 5), the temperature sensor is turned on. It is determined whether or not the temperature in the hot water storage tank 22 detected at has reached the predetermined temperature,
When it is determined that the temperature is lower than the set temperature, the point at which the combustion operation is instructed to the burner 2 and the use state of the stove 1 are determined (step S3 in FIG. 5), and the stove 1 is in an unused state. Is the same as the case of the third embodiment in that a shutoff operation is instructed to the heat shutoff mechanism 20 when.

In the fourth embodiment, when it is determined that the stove 1 is in use, the control means 23
Are both large and small hot water storage tanks 22a, 22b with respect to the valve device 29.
The valve device 29 is controlled so as to open the respective conduits leading to the heater (step S4 in FIG. 5), and when it is determined that the stove 1 is in an unused state, one of the hot water storage tanks (in the illustrated example, Only the pipeline leading to the large hot water storage tank 22a is opened and the other hot water storage tank (the small hot water storage tank 22 in the illustrated example) is opened.
Control is performed so as to block the conduit leading to b) (step S5 in FIG. 5).

In other words, in the present embodiment, when the purpose of combustion of the burner 2 (the state of use of the entire hot water supply system including the stove 1) is only to supply hot water to the hot water storage tank 22, only the large capacity hot water storage tank 22a is used. On the other hand, the burning purpose of the burner 2 is only for the heating purpose in the stove 1,
When both the heating and hot water supply are intended, both large and small hot water storage tanks 22a and 22b are used.

Thus, for example, even if the burner 2 is burned for the purpose of hot water supply and the water temperature in the hot water storage tank 22a has already reached the set temperature, the use of the stove 1 is started, Since the heat generated by using the stove 1 can be utilized by the hot water storage tank 22b having a small size,
Waste heat can be always and effectively used without waste.

Embodiment 5 Next, another embodiment of the hot water supply system of the present invention will be described with reference to the flowchart of FIG.

The hot water supply system of the fifth embodiment is different from the hot water supply system of the fourth embodiment in that a plurality of hot water storage tanks 22 are prepared, and the hot water storage tank
In contrast to switching between 2a and 22b,
In the present embodiment, while the hot water storage tank 22 is a single hot water storage tank,
The set temperature is switched according to the use condition of the hot water supply system.

More specifically, the hot water supply system of the fifth embodiment has the same basic structure as that of the hot water supply system shown in FIG. In the example shown, two of 80 ° C and 60 ° C
Type) set temperature.

That is, in this hot water supply system, when the stove 1 is not in use, the set temperature of the hot water storage tank 22 is set to 60 ° C. (step S3 in FIG. 4), while the stove 1 is in use. In this case, the set temperature is set to 80 ° C. (Step S4 in FIG. 4).

In other words, in the fourth embodiment, the calorific value of the waste heat due to the use of the stove 1 is added by adding a small hot water storage tank 22b according to the use condition of the hot water supply system (increase of the entire capacity of the hot water storage tank 22). While trying to use
In the present embodiment, the use of the waste heat by the use of the stove 1 is achieved only by switching the set temperature without changing the capacity of the hot water storage tank 22.

As a result, in the present embodiment, the hot water supply system can be realized with a single hot water storage tank 22 without preparing a plurality of hot water storage tanks 22a and 22b as in the above-described fourth embodiment. Can be achieved.

The above-described embodiment shows a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope of the present invention.

For example, in the above-described embodiment, the fuel using the gas is used as the fuel for the combustion type gas stove 1, but in the combustion type gas stove 1 of the present invention, the combustion gas is not discharged indoors. It is also possible to use a liquid fuel (for example, kerosene) or a solid fuel, which has lower combustion performance than gas.

Further, in the above-described embodiment, the configuration in which the combustion type stove 1 includes the radiator 3 and the heat storage unit 8 has been described. For example, if a sufficient heat storage effect can be expected with the radiator 3 alone, The body 8 can be omitted. Similarly, in the above embodiment, the configuration in which the radiant heat from the radiator 3 is radiated through the heat-resistant glass 10 has been described. However, the radiator 3 itself is fitted into the opening 4 b of the main body container 4. It is also possible. In this case, it goes without saying that the main body container 4 has a sealed structure together with the radiator 3.

[0105]

As described above in detail, according to the combustion type stove of the present invention, the combustion of the burner is carried out only in a space which is enclosed with respect to the room. It is not necessary to consider combustion gas) and the like, and the environment in the room where the stove is installed can always be maintained in a favorable state.

In addition, since the object to be heated is heated by radiant heat from the radiator and the burner is housed in the main body container, it is necessary to take into account fire extinguishing due to boiling over and adhesion of dust to the burner. Since there is no stove, it is possible to safely use the stove.

Furthermore, since high-temperature air combustion (or low-oxygen combustion according to the fourth aspect of the present invention) is realized in the combustion chamber, for example, the heating efficiency of the stove itself, the combustion efficiency, and the nitrogen oxidation can be improved. Various effects by high-temperature air combustion such as suppression of matter generation and reduction of combustion noise can be obtained.

Further, according to the hot water supply system of the present invention, the heat source of the stove and the heat source of the water heater which have been separately provided so far can be used effectively, because the heat source can be effectively used. In addition, since the heat exchanger of the water heater is arranged in the exhaust path of the stove, the waste heat previously exhausted by the stove into the room can be effectively used, and the energy Effective utilization can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing one embodiment of a combustion type stove according to the present invention.

FIG. 2 is an explanatory sectional view showing another embodiment of the combustion type stove.

FIG. 3 is a schematic configuration explanatory view showing one embodiment of a hot water supply system according to the present invention.

FIG. 4 is a schematic explanatory view showing another embodiment of the hot water supply system.

FIG. 5 is a flowchart illustrating a hot water storage tank switching operation in the hot water supply system shown in FIG. 4;

FIG. 6 is a flowchart illustrating the operation of a third embodiment of the hot water supply system according to the present invention.

FIG. 7 is an explanatory sectional view showing an embodiment of an air preheating means in the combustion type stove according to the present invention.

FIG. 8 is an explanatory sectional view of a conventional combustion stove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion stove 2 Burner 3 Radiator 4 Main body container 5 Supply / exhaust means 5a Air supply path 5b Exhaust path 6 Combustion chamber 6b Opening 7 Convection path 8 Heat storage element 9 Gas pipe 10 Heat resistant glass 11 Gotoku 14 Combustion gas recirculation Opening section 20 heat shutoff mechanism 21 heat exchanger 22 hot water storage tank 23 control means 24 going pipe 25 return pipe 26 circulation pump 29 valve device 101 preheating heat storage body 102 air circulation pipe 103 air supply destination switching means A heated body W Wall material

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F24C 15/34 F24C 15/34 D F24H 1/18 F24H 1/18 QC (72) Inventor Toshiaki Hasegawa Yokohama-shi, Kanagawa 2-53-1, Shirite, Tsurumi-ku Nippon Furness Industrial Co., Ltd. (72) Inventor Yasushi Yasushi 93 Edocho, Chuo-ku, Kobe-shi, Hyogo Noritsu Co., Ltd. (72) Inventor Ken Kishimoto 4 Setagaya, Setagaya-ku, Tokyo −28-1 Kokushikan University F term (reference) 3K017 DC03 DC04 3K023 QA18 QB02 QB03 QB10 QB18 QB20 QB21 QC05 QC06 QC13 3L025 AA02 AA14 AC01 AC06 AD01 AD09 AD10

Claims (15)

[Claims] 1. A burner, a radiator heated by a combustion gas of the burner, a main body container for accommodating both the burner and the radiator in a space closed to a room,
A supply / exhaust unit that communicates with the main body container to discharge the combustion gas of the burner to the outside and sucks the combustion air of the burner from the outside, and heats the object to be heated by radiant heat from the radiator. Combustion stove characterized by the following. 2. A convection of combustion gas between the main body container and the combustion chamber by providing a combustion chamber in which the burner is built and an opening for discharging combustion gas is formed inside the main body container. A path is formed, and an exhaust path of the air supply / exhaust means is provided so as to communicate with the convection path, and an air supply path of the air supply / exhaust means is communicated with an air inlet of the burner. Item 2. A combustion type cooking stove according to Item 1. 3. A combustion stove according to claim 2, wherein an opening provided in the combustion chamber is formed at least at an upper end of the combustion chamber. 4. The combustion stove according to claim 2, wherein the combustion chamber includes air preheating means for heating air in the combustion chamber. 5. The air preheating means comprises: a pair of air-permeable preheating regenerators arranged facing the combustion chamber; and connecting the preheating regenerators to each other. An air circulation pipe that forms a circulation path of air by communicating a body with the combustion chamber, and is connected to the air supply path and provided in the air circulation pipe and supplied from the air supply path. The combustion type stove according to claim 4, further comprising air supply destination switching means for alternately supplying combustion air to the pair of preheating regenerators. 6. The convection path is communicated with an air supply port of the burner, and at least a part of the combustion gas circulating in the convection path is circulated and supplied to the air supply port of the burner. The combustion type stove according to claim 2 or 3, wherein: 7. The heat treatment apparatus according to claim 1, wherein the main body container has a heat-insulating structure, heat-resistant glass is disposed on an upper end surface of the main body container, and radiant heat of the radiator is radiated to the heated object via the heat-resistant glass. A combustion stove according to any one of claims 1 to 6. 8. A radiator is provided between the burner and the radiator, and the radiator is heated by radiant heat from the regenerator. Combustion stove described in. 9. A hot water supply system using the combustion type stove according to any one of claims 1 to 8, wherein at least an exhaust passage of a supply / exhaust means of the combustion type stove is provided. A hot water supply system comprising a heat exchanger and hot water storage means for storing hot water heated by the heat exchanger. 10. The hot water storage means includes a hot water tank for storing hot water and a control means for controlling the temperature of the hot water in the hot water tank, wherein the control means includes at least hot water stored in the hot water tank. The control system according to claim 9, further comprising a control structure for detecting a temperature and issuing a combustion command to the burner so that the detected temperature reaches a predetermined temperature. Hot water supply system. 11. A plurality of hot water tanks are provided, and hot water heated by the heat exchanger is stored in one or more hot water tanks selected from the plurality of hot water tanks. The hot water supply system according to claim 9, wherein 12. The hot water supply system according to claim 11, wherein the plurality of hot water storage tanks are constituted by a pair of large and small hot water storage tanks having different capacities. 13. The hot water storage tank according to claim 1, wherein the selection of the hot water storage tank is determined according to a use condition of a hot water supply system.
The hot water supply system according to claim 1 or 12. 14. The hot water supply system according to claim 10, wherein a plurality of set temperatures are stored in the control means, and the set temperatures are selectively changed according to a use condition of the hot water supply system. 15. The hot water stove comprising the hot water supply system includes a heat shutoff mechanism configured to shut off radiant heat from the radiator.
The hot water supply system according to claim 14.