KR200259466Y1 - Hot blast heater using as gas and liquid fuel - Google Patents

Abstract

The present invention relates to a gas and liquid fuel combined hot air fan, more specifically, a clean gas fuel consisting of hydrocarbon (CH ₄ , C ₂ H ₅ , C ₃ H _8, etc.) and general liquid fuel can be used in parallel. In particular, natural gas fuels can be used to promote the growth of greenhouse plants by releasing CO ₂ gas in the exhaust gas, and to achieve complete combustion of gas and liquid fuels to prevent the release of pollutants due to unburned gas and It relates to a gas and liquid fuel combined hot air heater that can improve the fuel utilization efficiency by using the latent heat of the exhaust gas.

The purpose of the present invention is to induce the combustion gas and unburned gas generated after the combustion of gas and liquid fuel for a long time to perform complete combustion, thereby minimizing the emission of pollutants due to unburned and the environmental pollution caused by it. Gas fuel and liquid fuel can be used in parallel, and latent heat of exhaust gas can be used to improve fuel utilization efficiency, and hydrocarbon-based (CH ₄ , C ₂ H ₅ , C ₃ H _8, etc.) gas fuel. It is to provide a gas and liquid fuel combined hot air heater that can discharge the CO ₂ gas in the exhaust gas by injecting the combustion by injection to promote the growth of plants.

The construction of the present invention for achieving the above object is a cylindrical hot air blower body having one side opened and a predetermined hot air discharge path at one end thereof, and introducing the external air into the hot air blower body to discharge the hot air discharge path to the hot air discharge path. A blowing means provided on one side of the main body, a raw material input pipe penetrating one side of the hot air blower main body and having a predetermined diameter and bent on one side, and a heating furnace main body provided in the horizontal direction in the hot air blower main body, and the raw material feeding pipe A gas inlet pipe connected to the heating body through the gas supply pipe, an air inlet pipe connected to the heating body through the raw material input pipe, and conveyed with predetermined air, and provided in the heating body. A gas combustion chamber which mixes and combusts gas and air, and is connected to the gas combustion chamber through the raw material input pipe. A spark wire guide tube having a built-in wire to ignite the high-transmitted gas and air, and a predetermined distance from the combustion chamber, and vaporizes the liquid fuel introduced from the outside by the flame generated by the combustion chamber to generate a flame. A first heat dissipation plate protruding from a liquid fuel vaporization combustion chamber and an outer circumferential surface of the liquid fuel vaporization combustion chamber to generate heat by remaining predetermined heat by a flame generated by the gas combustion chamber and the liquid fuel vaporization combustion chamber, and the liquid fuel vaporization It is provided on one side of the combustion chamber and provided with a plurality of flame passages having a predetermined diameter to contact the secondary combustion chamber of the heating furnace for reburning the gas and liquid fuel, and to contact one side of the secondary combustion chamber of the heating furnace to form a predetermined space therein. Complete combustion chamber for remaining combustion gas and liquid fuel to be re-burned, and is provided on one side of the complete combustion chamber A plurality of exhaust gas remaining chambers in which exhaust gas generated after combustion of gas and liquid fuel remain for a predetermined time, and connected to one side of the complete combustion chamber to guide the exhaust gas generated after combustion of gas and liquid fuel to the exhaust gas remaining chamber. Exhaust latent heat guide tubes, a plurality of exhaust heat latent heat generating tubes formed laterally on one side of the exhaust gas remaining chamber, and a plurality of heat dissipating fins are formed on an outer circumferential surface to generate latent heat of exhaust gases, and the latent heat latent heat generating tubes It is connected to and provided at a predetermined distance above the hot air blower main body is characterized in that consisting of an exhaust gas collecting tank formed with an exhaust gas outlet so that the heat radiation exhaust gas is collected and discharged to the outside.

Description

Hot blast heater using as gas and liquid fuel}

The present invention relates to a gas and liquid fuel combined hot air fan, more specifically, a clean gas fuel consisting of hydrocarbon (CH ₄ , C ₂ H ₅ , C ₃ H _8, etc.) and general liquid fuel can be used in parallel. In particular, natural gas fuels can be used to promote the growth of greenhouse plants by releasing CO ₂ gas in the exhaust gas, and to achieve complete combustion of gas and liquid fuels to prevent the release of pollutants due to unburned gas and It relates to a gas and liquid fuel combined hot air heater that can improve the fuel utilization efficiency by using the latent heat of the exhaust gas.

In the non-harvest winter season, heating in a plastic house is an important means of determining crop conditions, and various heat supply methods have been proposed in this field.

Representatively, a vinyl duct is installed in each furrow between the cultivated toad and the toad to supply heat by blowing hot air into a blower fan, and to heat the heat sink installed at the toad by preheated hot water. There is a way.

In the case of the former heat supply method, the temperature rises to the reaching temperature within a predetermined time in a portion close to the hot air heater, but the temperature is low because the heat is consumed while moving to the remote portion.

In other words, it is uneconomical because the temperature difference between the short and long distance occurs from the location of the hot air heater, especially when the cultivation area is wide, the temperature difference is more severe, and much time and fuel are consumed until the temperature rises to the set temperature.

In the case of the heat supply method using the heat sink described in the latter case, the bottom of the crop adjacent to the heat sink dries up in hot heat, resulting in a large number of crops discarded, and in the case of tall crops, the crops are damaged by the convection temperature difference. There is a problem that the value of the product is lowered such that the surface of the fruit cracks.

On the other hand, the combustion chamber used in the hot air heater burns using solid fuels such as wood and anthracite coal, liquid fuels such as light and kerosene and gaseous fuels such as natural gas, thereby dissipating high-temperature heat generated through the radiator. Hot air is discharged through the blower fan.

However, in the case of solid fuels such as anthracite coal, heat is generated locally and thus the warmth cannot be evenly distributed in the greenhouse, and thus the use effect is reduced, and heat efficiency is low because the heat generation is not large compared to the size of the fuel. In addition, some of the toxic gas during combustion is discharged into the greenhouse, which adversely affects the crops, resulting in a decrease in output due to the death or deterioration of the crops, and also a problem of impairing the health of the workers.

In the case of the combustion chamber using the liquid fuel, the liquid fuel is injected into the fine particles by instantaneous and strong pressure by the nozzle and then burned, so that the combustion with the air is insufficiently mixed with the air. In addition, since the combusted gas is discharged directly through the exhaust port, it has a closed end that is difficult to completely burn.

As such, combustion caused by injection of only liquid fuel generates a lot of unheated substances or harmful gases, which is a factor that pollutes the atmosphere. In particular, many pollutants are generated at the start and end of the operation of the burner. .

The present invention was devised to solve the above problems, and an object of the present invention is to burn the combustion gas and the unburned gas generated after the combustion of the gas and the liquid fuel to remain for a considerable time to perform the unburned combustion. It is possible to minimize the emission of pollutants and the environmental pollution caused by this, and by using gas fuel and liquid fuel in parallel, and by using latent heat of exhaust gas, it is possible to improve the fuel utilization efficiency. ₄ , C ₂ H ₅ , C ₃ H _8, etc.) The present invention provides a gas and liquid fuel combined hot air fan that can accelerate the growth of plants by discharging CO ₂ gas in the exhaust gas by injecting and combusting gas fuel.

The construction of the present invention for achieving the above object is a cylindrical hot air blower body having one side opened and a predetermined hot air discharge path at one end thereof, and introducing the external air into the hot air blower body to discharge the hot air discharge path to the hot air discharge path. A blowing means provided on one side of the main body, a heating element body penetrating one side of the hot air blower main body and having a predetermined diameter and bent on one side, the heating furnace main body provided in the transverse direction in the hot air blower main body, and the raw material feeding pipe A gas inlet pipe connected to the heating body through the gas supply pipe, an air inlet pipe connected to the heating body through the raw material input pipe, and conveyed with predetermined air, and provided in the heating body. A gas combustion chamber which mixes and combusts gas and air, and is connected to the gas combustion chamber through the raw material input pipe. And a spark wire guide tube having a built-in wire to ignite the transferred gas and air, and a predetermined distance from the combustion chamber, and vaporizing the liquid fuel introduced from the outside by the flame generated by the combustion chamber to generate a flame. A first heat dissipation plate protruding from a liquid fuel vaporization combustion chamber and an outer circumferential surface of the liquid fuel vaporization combustion chamber to generate heat by remaining predetermined heat by a flame generated by the gas combustion chamber and the liquid fuel vaporization combustion chamber, and the liquid fuel vaporization It is provided on one side of the combustion chamber and provided with a plurality of flame passages having a predetermined diameter to contact the secondary combustion chamber of the heating furnace for reburning the gas and liquid fuel, and to contact one side of the secondary combustion chamber of the heating furnace to form a predetermined space therein. Complete combustion chamber for remaining combustion gas and liquid fuel to be re-burned, and is provided on one side of the complete combustion chamber A plurality of exhaust gas remaining chambers in which exhaust gas generated after combustion of gas and liquid fuel remain for a predetermined time, and connected to one side of the complete combustion chamber to guide the exhaust gas generated after combustion of gas and liquid fuel to the exhaust gas remaining chamber. Exhaust latent heat guide tubes, a plurality of exhaust heat latent heat generating tubes formed laterally on one side of the exhaust gas remaining chamber, and a plurality of heat dissipating fins are formed on an outer circumferential surface to generate latent heat of exhaust gases, and the latent heat latent heat generating tubes It is connected to and provided at a predetermined distance above the hot air blower main body is characterized in that consisting of an exhaust gas collecting tank formed with an exhaust gas outlet so that the heat radiation exhaust gas is collected and discharged to the outside.

More preferably, the furnace main body has a double wall, the one end of which is opened so that air is introduced from the outside, and a plurality of first air injection holes formed therein so that the introduced air is introduced into the furnace body, and the furnace body outer peripheral surface It characterized in that the second heat radiation plate is formed so as to dissipate a predetermined heat into the main body of the warmer.

More preferably, a plurality of second air injection holes are formed along the inner circumferential surface of the gas combustion chamber so that the air introduced through the air inlet pipe is vortexed and injected.

More preferably, a water pipe having a predetermined diameter is provided on the outer circumferential surface of the liquid fuel combustion chamber so as to generate hot water.

More preferably, the exhaust gas collecting cylinder is characterized in that a plurality of air preheating pipes are formed through the blowing means so as to be heated by the heat of the exhaust gas when the outside air is introduced.

1 is a perspective view showing a gas and a liquid fuel combined hot air blower according to the present invention,

Figure 2 is a longitudinal cross-sectional view showing a gas and liquid fuel combined hot air heater according to the present invention,

3 is a perspective view showing a liquid combustion chamber and a heat sink of a gas and liquid fuel combined hot air heater according to the present invention,

Figure 4 is a perspective view showing a complete combustion chamber and the exhaust gas guide pipe of the gas and liquid fuel combined hot air according to the present invention,

Figure 5 is a perspective view showing the exhaust gas residual chamber and the exhaust gas latent heat generating tube of the gas and liquid fuel combined hot air heater according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: main body of the hot air fan 11: hot air discharge path

20: motor 21: blowing fan

30: heating furnace body 31: raw material input pipe

32: gas combustion chamber 33: first air injection hole

34 ring blower 35 second air injection hole

40: gas inlet pipe 41: gas storage tank

42: pressure regulator 43: gas fuel injection port

50: air inlet tube 60: spark wire guide tube

70: liquid fuel inlet tube 71: liquid fuel storage tank

72: liquid fuel regulator 80: liquid fuel vaporization chamber

90: water pipe 100: the first heat sink

110: complete combustion chamber 120: exhaust gas residual chamber

130: exhaust gas guide tube 140: exhaust gas latent heat generating tube

141: heat radiation fin 150: exhaust gas collection chamber

160: exhaust gas outlet 170: air preheating tube

210: liquid fuel injection port 220: spark plug

230: secondary combustion chamber 240: flame opening

250: second heat sink 300: control box

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the gas and liquid fuel combined hot air heater according to the present invention.

1 is a perspective view showing a gas and liquid fuel combined hot air blower according to the present invention, Figure 2 is a longitudinal sectional view showing a gas and liquid fuel combined hot air blower according to the present invention, Figure 3 is a gas and liquid fuel combined hot air blower according to the present invention 4 is a perspective view showing a liquid combustion chamber and a heat sink of FIG. 4 is a perspective view showing a complete combustion chamber and an exhaust gas guide tube of a combined gas and liquid fuel hot air blower according to the present invention, and FIG. A perspective view showing a gas residual chamber and an exhaust gas latent heat generating tube.

As shown in the drawings, the present invention is provided with a cylindrical hot air blower body 10 having one side opened and a predetermined hot air discharge path 11 formed at one end thereof.

A motor 20 is fixed to one side of the warmer main body 10 and a blowing fan 21 connected to the motor 20 is provided.

The heating fan body 10 is provided with a heating furnace body 30 spaced apart from the blowing fan 21 by a predetermined distance, one side of the heating body main body 30 has a predetermined diameter and bent the raw material input pipe 31 The second heat dissipation plate 250 protrudes through one side of the warmer main body 10 and protrudes by a predetermined length on the outer circumferential surface to dissipate heat generated in the heating main body into the warmer main body.

On the other hand, the gas inlet pipe 40, the air inlet pipe 50, the spark wire guide tube 60 connected to the inside of the furnace body 30 through the raw material input pipe 31 is provided with the furnace body 30 Gas and air are supplied to the gas combustion chamber 32 provided in the inside).

Inside the gas combustion chamber 32, a plurality of second air injection holes 35 through which the introduced air is injected are formed.

On the other hand, the furnace main body 30 has a double wall so that one end is opened so that air is introduced from the outside, and a plurality of first air injection holes 33 are formed at one side so that the introduced air is introduced into the furnace body.

A liquid fuel vaporization combustion chamber (80) is provided, which is spaced apart from the gas combustion chamber (32) and burns the liquid fuel introduced by the liquid fuel inlet pipe (70).

A liquid fuel storage tank 71 is provided at one side of a warm air fan, and a liquid fuel controller 72 is provided at the liquid fuel inlet pipe 70, and the liquid fuel is injected into the liquid fuel vaporization combustion chamber 80. A plurality of liquid fuel injection holes 210 are formed inside the vaporization combustion chamber 80.

On the other hand, the outer circumferential surface of the liquid fuel vaporization combustion chamber 80 is provided with a water pipe 90 having a predetermined diameter so that water introduced from the outside contacts the liquid fuel vaporization combustion chamber 80 to be discharged to the outside so as to generate hot water. It is.

The first heat dissipation plate 100 is provided in contact with one side of the liquid fuel vaporization combustion chamber 80 to retain heat by flame generated by the gas combustion chamber 32 and the liquid fuel vaporization combustion chamber 80. Generate.

A heating furnace secondary combustion chamber 230 having a plurality of flame passages 240 having a predetermined diameter is provided at one side of the liquid fuel vaporization combustion chamber 80.

The complete combustion chamber 110, which is in contact with one side of the secondary combustion chamber 230 and forms a predetermined space therein, is reburned by remaining unburned gas and liquid fuel.

An exhaust gas remaining chamber 120 is provided at one side of the complete combustion chamber 110 so that the exhaust gas generated after combustion of gas and liquid fuel remains for a predetermined time, and a plurality of exhaust gases connected to one side of the complete combustion chamber 110 are provided. The guide tube 130 guides the exhaust gas generated after the combustion of gas and liquid fuel to the exhaust gas remaining chamber 120.

One side of the exhaust gas remaining chamber 120 protrudes from the opening of the main body 10 of the warmer to form an exhaust gas latent heat generating tube 140 in the horizontal direction, and a plurality of heat dissipation fins 141 are formed on the outer circumferential surface of the exhaust gas. The latent heat of the was to give off.

The exhaust gas latent heat generating tube 140 is connected to the upper portion of the hot air blower body 10 and provided with an exhaust gas collecting cylinder 150, and on one side, the radiated exhaust gas is collected and exhausted to the outside. An outlet 160 was formed.

In addition, the exhaust gas collecting tube 150 is formed with a plurality of air preheating tube 170 penetrated to be heated by the heat of the exhaust gas when the outside air is introduced by the blowing means.

According to the present invention configured as described above, first, the gas fuel stored in the gas reservoir 41 is depressurized by the pressure regulator 42 and injected into the gas combustion chamber 32 through the gas fuel injection port 43, and the ring blower 34. Spark (220) is provided at one end of the spark wire guide pipe (60) in which the wires are injected by injecting the air (oxygen) required for combustion by a constant speed to the gas combustion chamber (32) through the second air injection port (35). Ignition by) forms a flame.

The flame generated as described above is injected into the liquid fuel vaporization chamber 80 formed at a predetermined distance from the gas combustion chamber 32 and strikes the inner wall and is out of the liquid fuel vaporization chamber 80 with the flow rate decelerated. Diffuses and stays for a period of time.

At this time, when the liquid fuel vaporization combustion chamber 80 reaches a constant temperature, the liquid fuel can be used in parallel without using the gas fuel, and when the user supplies the liquid fuel through the liquid fuel inlet pipe 70 The liquid fuel is vaporized into the heated liquid fuel vaporization combustion chamber 80 and sprayed.

The vaporized liquid fuel is pyrolyzed by high temperature hot air in the liquid fuel vaporization combustion chamber 80 so that combustion occurs.

That is, the liquid fuel introduced through the liquid fuel inlet pipe 70 is vaporized and injected through a plurality of liquid fuel injection holes 210 provided inside the flame generated by the gas combustion chamber 32 to be heated. do.

The gas fuel and the liquid fuel are combusted in the liquid fuel vaporization combustion chamber 80 to generate a flame, and heat the first heat sink 100 provided at one side of the liquid fuel vaporization combustion chamber 80.

Combustion gas and a small amount of unburned gas of a gas fuel and a liquid fuel reach a heating furnace secondary combustion chamber 230 formed at one side of the liquid fuel vaporization combustion chamber 80, wherein the heating furnace secondary combustion chamber 230 is provided. It is not discharged smoothly by a plurality of flame passages 240 formed in the predetermined vortex to form a small amount of unburned gas is burned.

In addition, a plurality of exhaust gas guide tubes 130 having a small diameter are formed at one side in the complete combustion chamber 110 provided at the lower portion of the heat dissipation plate 100 so that the unburned gas having passed through the secondary combustion chamber 230 of the heating furnace is immediately As it is not discharged and vortexed, it is re-burned by hot hot air to minimize the generation of unburned gas.

That is, the flame generated in the gas combustion chamber 32 and the liquid fuel vaporization combustion chamber 80 heats the first heat sink 100 and then in the complete combustion chamber 110 provided on one side of the first heat sink 100. As the rate of discharge of the exhaust gas is delayed, the combustion gas is discharged almost completely as the combustion gas is reheated with sufficient residence time.

By passing through the exhaust gas guide tube 130 provided on one side of the complete combustion chamber 110, the exhaust gas remains in the exhaust gas remaining chamber 120 for a predetermined time and dissipates the heat of the exhaust gas into the hot air blower main body 10. Done.

The high temperature combustion gas passing through the exhaust gas guide tube 130 collects the exhaust gas provided in the opening portion of the main body of the hot air blower 10 through the latent heat generation tube 140 connected to both sides of the exhaust gas residual chamber 120. Collected in the chamber 150 is discharged to the outside through the exhaust gas outlet 160 provided on one side.

On the other hand, while the exhaust gas is passed through the latent heat generating tube 140 exhaust heat to the inside of the hot air blower main body 10 is moved to the outside, at this time the heat radiation fins protruding on the outer circumferential surface of the exhaust gas latent heat generating tube 140 By 141, heat dissipation is well achieved.

Here, the forced convection by the blower fan 21 and the air heated to a high temperature is discharged to the outside through the hot air discharge path 11 provided on one side of the hot air blower body (10).

Here, it is opened only when burning with gaseous fuel of hydrocarbon type (CH ₄ , C ₂ H ₅ , C ₃ H _8, etc.), and can be used to promote the growth of greenhouse plants by releasing CO ₂ gas in the exhaust gas. do.

Fully had have a sufficient residence time in the combustion chamber 110, so discharge in a nearly complete combustion state may be possible to remove the contaminants from the exhaust gas, the CO ₂ gas contained in the exhaust gas as described above, the growth of greenhouse plants It can be used to facilitate.

The high temperature combustion gas discharged from the complete combustion chamber 110 and the air introduced by the blower fan 21 by the high temperature heat radiated through the gas combustion chamber 32 and the liquid fuel vaporization combustion chamber 80 Heated and discharged to the outside through the warm air discharge path 11 provided on one side of the main body 10, it may be used as a heat source of the greenhouse by discharging by connecting the greenhouse supply duct used in the greenhouse.

On the other hand, the heat generated by burning the gas and the liquid fuel by the furnace main body 30 and the latent heat of the exhaust gas are allowed to stay in the hot air heater main body 10 for a predetermined time without immediately discharging the exhaust gas generated after the combustion. By heating the air introduced from the outside to generate a warm air can increase the efficiency as possible.

As described above, specific embodiments of the present invention have been described in detail, but those skilled in the art to which the present invention pertains may make various modifications without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiment, but should be determined by the equivalents of the claims, as well as the utility model registration claims described below.

As described above, according to the present invention, by maintaining the inside of the hot air blower body at a high temperature, it is possible to accelerate the thermal decomposition of the fuel and vaporize it quickly. By doing so, it is possible to minimize the emission of pollutants due to unburned and the environmental pollution caused by this.

In addition, the gas fuel and the liquid fuel can be used in parallel to increase the fuel utilization efficiency. In addition, the hydrocarbon gas (CH ₄ , C ₂ H ₅ , C ₃ H _8, etc.) is injected to combust the exhaust gas. Emission of CO ₂ gas in the plant has the effect of promoting the growth of plants.

Claims (5)

A cylindrical hot air blower main body having one side opened and a predetermined hot air discharge path formed at one end thereof; A blowing means provided at one side of the hot air blower main body to introduce external air into the hot air blower main body to discharge the air to the hot air discharge path; A heating furnace main body which penetrates one side of the hot air blower main body, has a predetermined diameter, and is bent at one side, and has a horizontal direction in the hot air blower main body; A gas inlet pipe connected to the main body of the heating furnace through the raw material inlet pipe and conveying a predetermined gas; An air inlet pipe connected to the heating body through the raw material inlet pipe and to which predetermined air is transferred; A gas combustion chamber provided in the main body of the heating furnace and burning the mixed gas and air; A spark wire guide tube having a wire built therein to ignite the gas and air which are connected to the gas combustion chamber through the raw material input pipe; A liquid fuel vapor combustion chamber provided at a predetermined distance from the combustion chamber and vaporizing liquid fuel introduced from the outside by the flame generated by the combustion chamber to generate a flame; A first heat dissipation plate which protrudes on an outer circumferential surface of the liquid fuel vapor combustion chamber and generates heat by remaining predetermined heat by a flame generated by the gas combustion chamber and the liquid fuel vapor combustion chamber; A secondary combustion port provided on one side of the liquid fuel vapor combustion chamber and provided with a plurality of flame passages having a predetermined diameter to reburn the gas and the liquid fuel; A complete combustion chamber in contact with one side of the secondary combustion port and forming a predetermined space therein to remain unburned gas and liquid fuel so as to be reburned; An exhaust gas remaining chamber provided at one side of the complete combustion chamber, the exhaust gas generated after combustion of gas and liquid fuel remaining for a predetermined time; A plurality of exhaust gas guide tubes connected to one side of the complete combustion chamber to guide exhaust gases generated after combustion of gas and liquid fuel to the exhaust gas remaining chamber; A plurality of exhaust gas latent heat generating tubes which are formed in one side of the exhaust gas remaining chamber in a horizontal direction and a plurality of heat dissipation fins are formed on an outer circumferential surface to generate latent heat of exhaust gas; The exhaust gas latent heat generating tube is connected to the upper portion of the hot air blower body is provided with a predetermined exhaust gas is characterized in that the exhaust gas collector consisting of an exhaust gas collecting port is formed so that the exhaust gas outlet is collected and discharged to the outside; Liquid fuel combined hot air heater. The method of claim 1, The furnace main body constitutes a double wall, one end of which is opened so that air is introduced from the outside, and a plurality of first air injection holes formed therein so that the introduced air is introduced into the furnace body, and the predetermined heat is applied to the outer circumferential surface of the furnace body. A hot air blower for both gas and liquid fuel, characterized in that the second heat dissipation plate is formed to diverge into the hot air blower body. The method of claim 1, A gas and liquid fuel combined hot air fan, characterized in that a plurality of second air injection holes are formed along the inner circumferential surface of the gas combustion chamber so that the air introduced through the air inlet pipe is vortexed and injected. The method of claim 1, Gas and liquid fuel combined warmer, characterized in that the outer circumferential surface of the liquid fuel combustion chamber is provided with a water pipe having a predetermined diameter to generate hot water. The method of claim 1, And a plurality of air preheating tubes formed in the exhaust gas collecting tube so as to be heated by the blowing means to heat the exhaust gas when the outside air is introduced.