JPH09250813A - Method for indoor heating and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method employable for efficiently, uniformly and safely heating a room and an apparatus capable of carrying out this method with respect to an indoor heating apparatus in which particularly, gap or kerosene is used as a fuel. SOLUTION: This indoor heating apparatus 1 has a burner 4 for burning a fuel by introducing the external air, which is disposed in a burner case 5 provided in an outer case 2. Further, a mixing chamber 10 is formed in the outer case 2 at a position facing an outlet port 3 provided to the outer case 2, and it is so constituted that a terminal end port of a hot air blow duct 9 communicating into the burner case 5 and a terminal end port of an external air duct 13 capable of sending the external air by means of an external air fan 15 provided at an intermediate portion of the external air duct 13 are opened into the mixing chamber 10. The hot air stream caused by the burner 4 and passing through the hot air blow duct 9 is mixed with the external air passing through the external air duct 13 in the mixing chamber 10, and the mixed air is blown through the outlet port 3 as hot air at a temperature of at least 25 and at most 45 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for effectively and efficiently heating a house room and a device configuration therefor. More specifically, the present invention relates to a method and an apparatus capable of heating a house room more safely and uniformly with less heat loss.

[0002]

2. Description of the Related Art As an example of a conventional indoor heating device, a fan heater 41 is shown in FIG. The fan heater 41 includes a burner 45 in an outer case 42 supported in a burner case 46. In this burner case 46, the ducts 4 that are continuously connected
The outside air can be taken in through the ventilation holes 47 exposed on the rear surface of the exterior case 42 by the operation of the air supply fan 50 arranged in the inside 8.

The fuel gas is burned on the burner 45 in the presence of this outside air, and the heated airflow generated by this burns into the duct 48 by the air feeding action of the air feeding fan 50. Outside air that has flowed in through the provided slit holes 49 through the outside air holes 43 on the surface of the outer case 42 flows into the duct 48. Since the inflowing outside air is cool air, the temperature is reduced while convection in the duct 48 in a mixed state with the above-mentioned heating air flow,
As a result, hot air is discharged from the discharge port 44 via the duct 48.

[0004]

According to the above-described conventional fan heater 41, in order to obtain the heating effect quickly, and because of the mechanism, the convection in the passage of the air flow is a single fan 5.
The generated hot air is 70
A relatively high temperature condition of ~ 80 ° C was set. That is, if the amount of air sent by the fan 50 is too large, the combustion efficiency in the burner 45 is reduced, the temperature of the discharged hot air is extremely reduced, and incomplete combustion is caused.

When the thus discharged hot air reaches such a relatively high temperature state, as shown in FIG. 2, in the room 17 of the room 16, the hot air a is a rapid rising air current. The high-temperature airflow reaches the vicinity of the ceiling plate 21, and the high-temperature air flow mainly stays in the upper region of the chamber 17. Therefore, the temperature difference with the lower region in the chamber 17 becomes 4 to 5 ° C. or more. Further, the temperature difference between the vicinity of the surface of the floor 20 in the chamber 17 and the middle area of about 160 cm from the floor 20 is 3 ° C or more.

Experience has shown that when such a temperature difference occurs in the chamber 17, it feels cold or causes only the head of the human body to be warmed and causes discomfort.

Further, when a particularly high temperature region is unevenly distributed in the room 17, the amount of heat released to the outside increases. Also the chamber 17
The amount of heat radiated from the window 19 is particularly large. This also causes a decrease in heating efficiency.

If the temperature of the discharged hot air a is high,
There is a great risk that the floor surface will be scorched or burned. In particular, the place where the baby is placed and used is greatly restricted so as not to come into contact with infants.

Therefore, after earnestly conducting research and experimentation, the temperature difference between the feet and the head in the upright state in the chamber is 1
It was discovered that the above-mentioned unpleasant sensation does not occur if it is within ℃, especially for indoor heating devices that use gas or oil as a fuel, a heating method that can be used efficiently and more uniformly and safely in the room, The purpose was to provide an apparatus capable of carrying out the method.

[0010]

In order to achieve the above-mentioned object, the present invention has the following indoor heating method. That is, in the case of using a device that burns fuel as a heat source in the presence of the outside air taken in, the hot air flow generated by this combustion is discharged as hot air whose temperature is reduced to 25 ° C or higher and 45 ° C or lower. It is characterized by being discharged from the outlet.

In the method of the present invention, as a device to be applied, any fuel such as fuel gas such as methane gas or propane gas or liquid fuel such as kerosene may be used as a combustion raw material. That is, as long as it is a device that burns fuel as a heat source in the presence of the outside air taken in, it can be applied regardless of whether it is called a fan heater or a stove.

2 discharged from the discharge port of such an apparatus
According to the warm air that has been cooled to a temperature state of 5 ° C. or more and 45 ° C. or less, the rising speed of the warm air after the discharge is suppressed in the applied indoor space, so that the temperature in the lower region of the room is increased. The residence time of the wind is long, and as a result, this warm air is spread all over the room. As a result, the temperature rise in the room can be made uniform.

Further, the uniformized rising temperature in the chamber is most efficiently exhibited when the warm air is discharged from the lowermost part of the apparatus. In other words, the discharged hot air is sufficiently spread around the surface of the floor.

Further, the homogenization of the room temperature, combined with the fact that the temperature of the discharged hot air is relatively low, reduces the dissipation of the amount of heat to the outside of the room. As a result, the efficiency of raising the room temperature is increased, and the room temperature is also increased within a short period of time.

If the warm air temperature at the discharge port is practically higher than the set temperature (for example, 22 ° C.), the required heating effect can be obtained. However, if the warm air temperature is less than 25 ° C., heating is required. The amount of warm air that should be discharged to obtain the required amount of heat becomes excessive, and on the contrary, a drawback accompanying this increase in the amount of air will occur. If the temperature of the hot air exceeds 45 ° C,
As in the case of the conventional device described above, the temperature rise of the target room temperature is unevenly distributed, and the heat quantity is dissipated to the outside excessively, resulting in a decrease in heating efficiency. Also, especially when the temperature of the hot air is 40 ° C or lower,
It is more preferable because the risk of burns is extremely low. Therefore, the preferable temperature of the discharged hot air is in the range of 30 ° C to 40 ° C.

The above indoor heating method can be achieved by applying the following indoor heating apparatus according to the present invention. That is, in a device that includes a burner that takes in outside air and burns fuel, and discharges the hot air flow generated by the burner as hot air from the discharge port on the outer case surface by the blower fan, the exterior facing the discharge port. While providing a mixing chamber in the case where the hot airflow mixes with the outside air,
It is characterized in that a temperature lowering mechanism including an outside air duct having an extreme end opening in the mixing chamber and an outside air fan for sending the outside air into the outside air duct is provided.

In this device, the burner is adapted to be fueled by fuel gas or liquid fuel.

The above-mentioned outside air fan is arranged, for example, on the wall surface of the exterior case of the apparatus so that the outside air can be taken in. It is sufficient that the outside air duct can guide the outside air from the outside air fan and that the extreme end portion of the outside air duct reaches the holding chamber so that the guided outside air can reach the holding chamber. Therefore, the main portion may be arranged inside or outside the outer case.

Further, it is preferable that the outside air fan can be electrically controlled so that the amount of blown air can be adjusted.
That is, the temperature of the hot air flow generated in the burner is linearly adjusted according to the air flow rate. Note that this temperature adjustment can be realized by a temperature sensor provided near the discharge port.

The extreme end portion of the outside air duct is provided so as to be inside the mixing chamber. Therefore, the outside air sent out from the extreme end opening flows in the mixing chamber so as to descend. As a result, both of them rapidly enter a mixed state and are made uniform to face the rising tendency of the hot air flow in a high temperature state flowing into the mixing chamber, and the temperature thereof is lowered.

The residence time of the air currents in the mixing chamber is uncertain because it depends on the flow velocities of the two air currents. However, a time suitable for obtaining both air currents as uniform hot air is set. To be done. As described above, the mixed airflow of both is discharged as warm air of 25 ° C. to 45 ° C., preferably 30 ° C. to 40 ° C. into the room of the house according to the flow velocity of the air flow through the discharge port of the device in a uniform temperature state. It

Further, in the above-described room heating apparatus of the present invention, the hot air discharged as described above is 25 ° C. or higher.
Since the temperature is lowered to a temperature of 5 ° C. or less, there is little risk of burning the floor surface on which it is placed during use. Therefore, the discharge port can be disposed at the lowermost position on the side surface of the device. Further, in this case, the flow straightening plate of the discharge port can be arranged along the floor surface on which the device is to be arranged.

When the indoor heating device is constructed in this manner, the heating effect of the target room is further enhanced, and when the discharged hot air is set to 40 ° C. or lower, burns occur during use. As described above, it can be safely used without causing any trouble.

Further, in order to efficiently heat the entire target room, it is preferable to reduce the influence of the velocity of the discharged warm air. That is, if the wind speed is too high, it may cause discomfort to the user. Therefore, when the amount of air to be discharged is increased according to the size of the target chamber, it is preferable to increase the size of the discharge port surface so as not to increase the wind speed of the discharged warm air. As a preferable example of this, the wind speed is 50 to 20.
This is the case when the speed is 0 m / min.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the method and apparatus of the present invention will be described with reference to the drawings. FIG. 1 shows a first configuration example of the indoor heating device. The device shown is a fan heater 1 that uses gas as fuel. The fan heater 1 includes a burner 4 in an outer case 2 having a discharge port 3 along the lower portion of the front surface.

The burner 4 is supported in a burner case 5 arranged in a hollow position in the outer case 2. Further, a blower fan 6 electrically operated is provided in a fan case 8 arranged on the rear wall of the exterior case 2 in a state where the end surface having the vent holes 7 ... Is exposed to the outside, and the blower fan 6 blows air. The opening of the fan case 8 is connected to one opening on the burner case 5 so as to be able to flow in.

Further, the mixing chamber 10 is provided at a position facing the inner surface of the discharge port 3 in the outer case 2 by being partitioned by a partition wall 11. In the mixing chamber 10, the other opening on the burner case 5 is provided. The extreme end portion of the blower duct 9 that is connected continuously extends. Therefore, the outside air can be taken into the burner case 5 from the ventilation holes 7 through the fan case 8 by the operation of the blower fan 6, and the gas supplied by the burner 4 is burned in the presence of this outside air. The hot airflow generated by this combustion flows into the mixing chamber 10 via the duct 9 along with the heating airflow and the external airflow.

Further, in the outer case 2, outside air holes 14 ...
The outside air duct 13 is arranged so that the first extreme end surface having the above is exposed to the rear surface of the case 2, and the other extreme end opening extends to the upper part in the retention chamber 10. An outside air fan 15 having a large number of blades is arranged on the peripheral surface of the cylindrical shaft at a position near the extreme end opening in the outside air duct 13, and the outside air hole 1
It is possible to forcibly guide the outside air taken in from 4 ... to the extreme end opening of the duct 13. Also, this outside air fan 1
5 is electrically controlled to adjust the amount of air blown.

Since the outside air flows out from the extreme end portion of the duct 13 at a low temperature, it acts to lower the temperature of the hot heated gas from the extreme end portion of the duct 9. This temperature lowering action occurs due to the mixing of both in the retention chamber 10,
Each of the end faces of the duct 13 and the duct 9 is disposed in a hollow position where the respective mouth surfaces face each other, and is subjected to the mixing action by a mixing fan 12 that rotates heterogeneously by the airflow from both of them. . Two or more mixing fans 12 can be provided depending on the mixing state.

Further, since the cold air tends to fall and the hot gas tends to rise, the outside air flowing out from the extreme end opening of the duct 13 located in the retention chamber 10 is positively mixed with the hot air flow from the duct 9. . As a result, both air streams are sufficiently uniformly mixed in the retention chamber 10 and are discharged from the discharge port 3 as warm air in a temperature state of 25 ° C. or higher and 45 ° C. or lower.

FIG. 2 shows a convection state of the warm air in the chamber portion 17 when the fan heater 1 is used. That is, since the hot air b discharged from the discharge port 3 of the fan heater 1 is cooled to a temperature state of 35 ° C. to 45 ° C., the discharge port 3 is disposed at the lowermost position on the front surface of the outer case 2. Combined with the fact that the inside of the room 17 is the floor surface 2
It covers the entire area including the lower area near 0 uniformly. Therefore, the temperature difference generated in the chamber 17 is reduced.

Next, a fan heater 25 using kerosene as fuel is shown in FIG. 3 as a second configuration example of the indoor heating device. The fan heater 25 includes a burner 28 in an outer case 26 thereof. A discharge port 27 is provided along the lowermost position on the front surface of the outer case 26.

The burner 28 is supported in a burner case 29 with a fuel supply pipe (not shown).
Further, an air supply fan 31 is provided at the bottom of the burner case 26.
Is provided in the fan case 32, and the fan case 3
2, a pipe 30 is provided so as to communicate with the inside of the burner case 29, and the outside air introduced by the air supply fan 31 is supplied into the burner case 29, whereby complete combustion of fuel on the burner 28 is achieved. become.

In order to stabilize the combustion state of the burner 28, a combustion cylinder 33 surrounding the upper region is provided, and the combustion cylinder 33 is in a space partitioned by a wind tunnel 34. .

The wind tunnel 34 is open so as to guide the hot air flow generated by the burner 28 to the front part of the outer case 26, and this open part defines a space portion facing the discharge port 27 in the outer case 26. It extends to an upper position in a mixing chamber 36 formed by a partitioning guide wall 35.

Further, an outside air fan 37 is provided at an upper position on the rear surface of the outer case 26, and a case end surrounding the outside air fan 37 has an extreme end opening located at an upper part in the mixing chamber 36 and the wind tunnel. An outside air duct 38 reaching a position corresponding to the open portion of 34 is connected. The outside air fan 37 is electrically controlled, and the outside air taken in by the outside air fan 37 is sent to the upper region in the mixing chamber 36 through the outside air duct 38.

A mixing fan 39 is provided in a hollow position in the mixing chamber 36 where the open portion of the wind tunnel 34 and the extreme end opening of the outside air duct 38 face each other.
The mixed external air and the hot air flow are mixed by the above. Further, at this time, since the outside air exhibits a downward tendency and the hot air flow exhibits an upward tendency, the mixed state of the both is further homogenized in the mixing chamber 36. As a result, the hot air whose temperature is lowered to a predetermined temperature is discharged from the discharge port 27 located in the lower portion of the mixing chamber 36.

[0038]

EXAMPLE Next, a configuration of the fan heater 1 described above, which has the following specifications, is approximately 80 m long.
^In a room having a volume of ³ (20 tatami mats), the heating effect was tested by using the environment shown in FIG. 2 under the environmental conditions of an indoor temperature of 8 ° C. and an outdoor temperature of 5 ° C.

(Specifications of fan heater 1) Fuel: city gas (methane 99.8%) Fuel consumption and heat generation amount in burner 4; maximum 300 l
/ hr, maximum 3000 Kcal / hr Air flow rate of convection fan 6; maximum 60 l / min Air flow rate of outside air fan 15; maximum 6 m ³ / min Area of outlet 3; 20 x 30 cm Air volume of warm air from outlet 3; maximum 6m ³ / min Temperature of hot air at outlet 3; 40 ℃

(Test Method) The fan heater 1 having the above-mentioned specifications is operated for 180 minutes, and the change with time in the room temperature at the center position of the floor 20 inside the room 17 is measured and the result is shown. It is shown in FIG. In the figure, A ₁ is ₁ from the floor
5 cm, A ₂ is 160 cm and A ₃ is 240 cm, and the temperature change characteristics with time.

Further, with respect to the conventional fan heater 41 having the same configuration as the above specifications, except for the outside air fan 15, the outside air duct 13 and the stay chamber 10, the change over time in the room temperature was measured under the same conditions as above, and the result was obtained. Is shown in FIG. In the figure, B ₁ is the temperature change characteristic at a position 15 cm from the floor, B ₂ is the same 160 cm, and B ₃ is the same 240 cm. The warm air temperature near the discharge port 43 was about 75 ° C.

From the results shown in FIG. 4, according to the apparatus according to the present invention, it takes about 30 minutes to raise the room temperature by 10 ° C. at a position 160 cm from the floor surface corresponding to the position of the head of a person. It has been confirmed that this has been achieved, which is in contrast to the fact that it takes about 70 minutes according to the conventional device that indoor heating can be obtained quickly.

According to the device according to the present invention, about 45
After 10 minutes, about 10 cm even at 15 cm from the floor located at the feet.
Although the temperature rises by 0 ° C., it is confirmed that the temperature cannot be reached within the measurement time according to the conventional apparatus. From this,
It can be seen that the device according to the present invention has extremely high heating efficiency.

Further, according to the apparatus of the present invention, the temperature difference between the respective measurement positions is within 1 ° C. Especially, the temperature difference between the positions of 15 cm and 160 cm from the floor is 1
It is kept within ℃. For this reason, it felt comfortable without standing cold on the floor of the room. This is a significant difference from the conventional device.

[0045]

Since the present invention is constructed as described above, the following effects are exhibited. According to the present invention,
Warm air discharged from the outlet of the indoor heating device is 35 ° C to 4 ° C.
Since it is in a low temperature state of 5 ° C, heat loss is reduced, the heating effect can be obtained efficiently and promptly, and it can be used safely. More specifically, by lowering the temperature of the discharged warm air, the fuel consumption can be reduced by 30% or more as compared with the conventional device.

Further, the heating condition in the room is a more uniform temperature condition, and particularly when the person is in the upright condition, the temperature difference between the feet and the head is suppressed within 1 ° C.,
It does not cause any discomfort due to the cold or the fact that only the head is heated.

Further, in the apparatus according to the present invention, the outside air is taken in by an outside air fan separate from the combustion system in the burner section and mixed with the hot air flow, and this outside air fan is electrically controlled. Therefore, the temperature of the hot air discharged from the discharge port can be adjusted linearly. Further, in the retention chamber of this device, the effect of accurately maintaining the warm air temperature at the set value is exhibited.

Further, in order to reduce the temperature of the hot air from the discharge port, the discharge port can be provided at the lowest position on the front surface of the outer case in terms of the structure of the apparatus, and in this case as well, the floor surface and the like can be safely burned without burning. It can be used and warm air can be applied directly along the floor. As a result, the uniform heating of the indoor heating is further enhanced.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an indoor heating device of the present invention.

FIG. 2 is a vertical sectional view showing a convection state of warm air.

FIG. 3 is a vertical cross-sectional view of the heating device of the present invention.

FIG. 4 is a temperature characteristic diagram of the indoor heating device of the present invention.

FIG. 5 is a temperature characteristic diagram of a conventional indoor heating device.

FIG. 6 is a vertical sectional partial side view of a conventional indoor heating device.

[Explanation of symbols]

 1,25 Fan heater 2,26 Exterior case 3,27 Discharge port 4,28 Burner 5,29 Burner case 10,36 Mixing chamber 13,38 Outside air duct 15,37 Outside air fan

Claims (4)

[Claims] 1. When a device that burns a fuel in the presence of the introduced outside air to use it as a heat source is used, the hot air flow generated by this combustion is the hot air whose temperature is lowered to 25 ° C. or higher and 45 ° C. or lower. An indoor heating method characterized by being discharged from a discharge port of the device. 2. The room heating method according to claim 1, wherein the temperature of the warm air whose temperature has been lowered is discharged from a lowermost position on the front surface of the apparatus. 3. An apparatus comprising a burner for taking in outside air and burning fuel, wherein the hot air flow generated by the burner is discharged as hot air from a discharge port on the surface of the outer casing.
A mixing chamber for mixing the hot air flow with the outside air is provided in the exterior case facing the discharge port, and an outside air duct having an extreme end opening in the mixing chamber and an outside air fan for feeding the outside air into the outside air duct. An indoor heating device characterized by comprising a temperature lowering mechanism comprising 4. The indoor heating device according to claim 3, wherein the discharge port is formed at a lowermost position of a front surface portion of the exterior case.