JPH0210032A - Hot air space heater - Google Patents

Abstract

PURPOSE:To uniformly heat the total space of a room by a method wherein a hollow duct which has a hot air passage therein and multiple hot air outlet ports perforated on the upper surface thereof is arranged on the floor surface in the vicinity of a wall surface in the room or at the lower part of the wall surface so as to cover at least the total length of the wall surface and hot air is introduced through a part of the duct. CONSTITUTION:Hot air generated by a hot air generator 1 is introduced into a duct 3 and blown upward out of multiple hot air outlet ports 4 perforated on the upper surface of the duct 3. Since the duct 3 is arranged in the vicinity of a wall surface, a portion of warm air ascends while heating the wall surface cooled by the external air, and the vicinity of the duct 3 causes negative pressure due to the outlet of hot air and the ascending stream of warm air. As a result, air near a floor surface, which is relatively low at a temperature, moves toward the duct 3 and is heated by hot air blown out of the hot air outlet ports 4. Accordingly, in a room is generated a large circulating stream of air which ascends above the duct 3 and decends in a space ranging from the substantially central part in the room to the vicinity of a wall surface opposed to the wall surface where the duct 3 is arranged. Thus, the inside of the room can be heated almost uniformly.

Description

[Detailed description of the invention] Industrial field of application The present invention utilizes hot air used for household heating, etc.2...
-/ This is related to the heater used.

Conventional technology Conventional heaters that use hot air include fan heaters and FF.
There is a type of hot air fan that heats the room by emitting warm air directly from the appliance into the room. In addition, as shown in Fig. 4, there is a method of heating the room by emitting hot air from a hot air generator 1 through a duct 2 through a number of blowing holes 4 drilled on the top surface of a mat 3 installed on the floor. Furthermore, as shown in FIG. 5, the warm air generator 1 passes through the duct 2 through the space inside the mat 3 installed on the floor while heating the top surface of the mat 3, and perforates the sides of the mat 3. Many systems are used in which hot air is emitted from a large number of provided blow-off holes 4, and the room is heated by the heat generated from the surface of the heated mat 3 and the warm air released from the blow-off holes 4.

Problems that the invention aims to solve A device of such conventional means will be explained.

In the case of systems that emit hot air directly from appliances, such as mass fan heaters or FF hot air fans, it is necessary to increase the speed of hot air blown from the appliance in order to equalize the indoor temperature. There is. Therefore, the hot air directly contacts the human body, causing discomfort, and the warm air moves upwards, making it difficult to maintain a uniform indoor temperature because the temperature near the indoor floor is extremely low. Ta.

In addition, in the case of the system shown in Fig. 4, the hot air supplied from the hot air generator 1 to the mat 3 via the duct 2 is dissipated on the surface of the mat 3, so that the hot air is placed at a location far from the hot air generator. The temperature of the warm air released from a certain blowout hole 4 decreases,
The temperature difference between the temperature of the hot air discharged from the blowout hole 4 near the hot air generator 1 becomes large, and the temperature varies greatly depending on the location on the mat 3, and the hot air directly contacts the human body, so that a comfortable heating effect cannot be achieved. I couldn't get it.

Furthermore, even in the case of the method shown in FIG. 5, when hot air passes through the inside of the mat 3, heat is radiated from the surface, and there is a large temperature difference between the surface of the mat 3 at a position close to the hot air generator 1 and a position far from the hot air generator 1. There was a problem.

The present invention solves the above-mentioned problems, and its primary purpose is to uniformly heat the entire indoor space.

The second purpose is to uniformly heat only the necessary space in the room to be heated.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention provides a hollow hot air passageway with a large number of hot air blowing holes on two sides so that hot air is blown out almost upward. The duct is arranged on the floor near the wall of the room or at the bottom thereof over almost the entire length of the wall, and hot air is introduced from a part of the duct.

Further, in order to achieve the second object, the duct is arranged so as to surround a necessary heated part in the living space, and warm air is introduced from a part of the duct.

When hot air is introduced into the hollow duct in the configuration described above, the hot air flows through the hot air passage in the duct and is emitted in two directions from the numerous hot air blowing holes drilled on two sides. Due to the natural convection effect of the warm air discharged from the hot air outlet of the duct and the indoor air heated by the warm air, a warm air current rises upward from the top surface of the duct.

In the first method, since the duct is placed at the bottom of the room near the wall, the wall is heated by hot air blown out from a large number of hot air blowing holes, thereby suppressing the cooling radiation from the wall. The whole is also heated by the warm air. At this time, the area near the duct becomes negative pressure due to the rising airflow of warm air, so the relatively low temperature air at the bottom of the room moves to the duct, is heated by the warm air, and rises at the top of the duct in the indoor space. In this case, a large downward circulating flow is generated to uniformly heat the interior of the room.

In the second method, the duct is arranged so as to surround the area in the room that requires heating, so that the heated area is surrounded by the warm air. Therefore, the cold air that tries to flow from the outside of the area surrounded by the duct into the heated area inside is blocked by this layer of warm air, is further heated by the warm air, and rises together with the warm air. In addition, since the area near the duct becomes negative pressure due to the rising airflow of warm air, the air in the heated area surrounded by the duct moves to the duct and is heated by the warm air, and in the space surrounded by the duct, the air above the duct A large circulating flow is generated that rises and descends in the center of the space, uniformly heating the space in the heated area.

Example An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is a hot air generator using electricity, gas, oil, hot water, etc. as a heat source, and 3 is a duct which has a hot air passage inside and is placed on the floor near the wall of the room over almost the entire length of the wall. ing. Reference numeral 4 designates a number of hot air blowing holes drilled in the upper surface of the duct 3.

In the above configuration, hot air generated by the hot air generator 1 is introduced into the duct 3 and is blown upward through a number of hot air blowing holes 4 formed on the upper surface of the duct 3. Above the duct 3, a warm air current rising from the upper surface of the duct 3 is generated due to the natural convection effect of the warm air blown out from the hot air outlet 7 and the nozzle 4 and the indoor air heated by the warm air.

Since the duct 3 is arranged near the wall surface, a portion of the warm air rises while heating the wall surface cooled by the outside air. The area near the duct 3 becomes negative pressure due to the hot air blowout and the rising airflow of warm air, so the relatively low temperature air near the indoor floor moves to the duct 3 and is blown out from the warm air blowout hole 4. Heated with hot air. Therefore, in the room, a large circulating flow is generated that rises at the top of the duct 3 and descends from approximately the center of the room to the wall facing the wall where the duct 3 is placed, heating the room almost uniformly. I can do it. In addition, since the wall surface is heated by warm air, it is possible to suppress the cooling radiation generated from the wall surface that has been cooled by the outside air. It also has the effect of suppressing temperature non-uniformity.

This effect is particularly great when the wall has a structure with poor insulation properties, such as a glass window, as shown in Figure 1. Further, it is preferable that the duct 3 be disposed at the bottom of all the walls in the room, but by disposing it over almost the entire length of at least one wall surface, a circulation flow is generated throughout the room, and since the present invention uses hot air, it is possible to generate a circulating flow throughout the room. By creating a stronger circulating flow than in a radiator that does not use wind, the indoor temperature distribution can be significantly improved compared to conventional examples.

In Fig. 2, 1 is a hot air generator that generates hot air using electricity, gas, oil, hot water, etc. as a heat source, and 2 is a connecting duct or duct that forms a hot air passage between the hot air generator 1 and the duct 3. 3
has a hot air passage inside and is arranged on the floor surface of the room so as to surround the heated portion of the indoor living space. 4 is a large number of hot air outlet holes drilled on the top surface of the duct 3;
5 is a heated section surrounded by the duct 3.

In the above configuration, the hot air generated by the hot air generator 1 is introduced into the hot air passage in the duct 3 via the connecting duct 2. The hot air introduced into the hot air passage of the duct 3 is blown upward through the hot air blow holes 4 formed in large numbers on the upper surface of the duct 3. In the duct 3, an airflow of warm air rises upward from the top surface of the duct 3 due to the natural convection effect of the warm air blown out from the hot air outlet 4 and the indoor air heated by the warm air. . Since the duct 3 is arranged so as to surround the heated section 5 that requires indoor warm air, the heated section 5 is surrounded by the layer of warm air. Since the area near the duct 3 becomes negative pressure due to the rising air flow of warm air, the relatively low temperature air in the lower part of the heated section 5 moves to the duct 3 and is heated by the warm air blown out from the hot air outlet 4. be done. Therefore, in the space of the heated part 5 surrounded by the duct, a large circulating flow is generated that rises at the upper part of the duct 3 and descends near the center of the heated part 5, uniformly heating the space of the heated part 5. be able to. Also, on the outside of the duct 3, the indoor air cooled by the low-temperature murals and the cold air flowing in from gaps in windows, etc. move toward the top of the duct 3, but the cold air is replaced by warm air blown out from the hot air outlet 4. The cold air does not directly flow into the space of the heated section because it is heated by the layer of warm air generated in the upper part of the duct 3 and rises together with the warm air. According to experiments, when a material with poor insulation properties is used for the duct 3, the temperature of the hot air blown out from the hot air outlet 4 closest to the hot air generator 1 is between the temperature of the warm air blown out from the farthest hot air outlet 4. Although there is a temperature difference of 20 to 30°C, the temperature difference in the space of the heated section 5 is only 2 to 3°C, and it was confirmed that the above-mentioned circulation effect is large. Additionally, the floor surface is not directly heated by hot air, but instead is heated by warm air from the indoor space, making the temperature distribution almost uniform.

With this configuration, the arrangement of the ducts makes it possible to heat only the necessary area within a large room. In other words, when the duct 3 surrounds only the area that requires heating, the inside of the duct 3 is effectively heated, and the temperature rise on the outside where heating is unnecessary is small, making it possible to perform economical heating.

Next, regarding the speed of airflow, which is a major factor in discomfort during heating, the hot air blowing direction is 11 ・-7 upwards, and there is no hot air blowing part in the heated area 5 where people are present. Because the speed of the hot air blown out from the air outlet 4 decreases rapidly after being blown out, there are very few areas where the speed is high, and for other reasons, the airflow that comes into contact with the human body is only a natural convection that is hardly felt, causing very little discomfort. .

In addition, by making the duct 3 from a flexible material such as highly airtight cloth or film-like plastic material, it expands when hot air is introduced into the duct 3 when in use, but contracts and becomes smooth when not in use. Because of this, it does not get in the way even if it is installed on the floor indoors. It can also be folded and made compact when stored. Further, there is an effect that the shape of the duct 3 can be changed depending on the shape of the place to be heated.

Effects of the Invention As is clear from the above explanation, according to the hot air heater of the present invention, a duct having a hollow wet layer passage with a large number of hot air blowing holes on two sides is installed near the wall of the room. The duct may be placed on the floor or at the bottom of the wall, spanning almost the entire length of at least one wall, or the duct may be placed so as to surround the heated area of the living space, and warm air may be introduced from a portion of the duct. Because of this configuration, the following effects can be expected.

(1) Uniform temperature distribution can be obtained throughout the room or in the heated area of the living space.

(2) The airflow speed is slow and there is no discomfort caused by the wind.

Furthermore, when the duct is made of a flexible material, it is easy to install and store, and its shape can be changed depending on the shape of the heating place.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a hot air heater according to an embodiment of the present invention;
The figure is a perspective view of the heater, FIG. 3 is a perspective view of the main parts, and FIGS. 4 and 5 are perspective views of a conventional example. 1. Warm air generator, 2. Connection duct, 3. Duct, 4. Warm air outlet. Name of agent: Patent attorney Toshio Nakao and one other person
Warm air blowout heating section

Claims (3)

[Claims] (1) A duct having a hollow hot air passage with a large number of hot air blowing holes bored in the upper surface is placed on the floor near the wall of the room or at the bottom of the wall of the room over almost the entire length of at least one wall. , a hot air heater in which a hot air introduction part is provided in a part of the duct. (2) A duct having a hollow hot air passage with a large number of hot air blowing holes bored in the upper surface is placed on the floor of the room or at the bottom of the wall of the room so as to surround the space to be heated; A hot air heater with a hot air introduction section. (3) The hot air heater according to claim 2, wherein the duct is made of a flexible material such as highly airtight cloth or film-like plastic.