JP3030560U - Indoor air recirculation device - Google Patents

Abstract

(57) [Abstract] [Problem] Warming air that stays near the indoor ceiling during heating
With a small electric bill fan, it sends out a certain distance without reducing the flow velocity and recirculates it convectively to warm the entire room uniformly. SOLUTION: In front of a case body 2 of a small fan 1,
The small air blower 4 is supported by the blower tube 4 supported by the suction gap 3 for sucking air from the surroundings.
Installed near the ceiling corner so that the front end of the fan faces the opposite wall surface in the room, operate the small fan 1 and take in warm air accumulated near the ceiling with the small fan 1 and send it to the blower cylinder 4, and flow velocity to a certain distance. It is characterized in that the indoor air is warmed evenly by causing a jet flow while preventing the decrease of the room temperature and causing the warm air that reaches the opposite wall to flow down and recirculate along the wall surface.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention allows warm air that rises and stays near the ceiling of the room during heating to simply flow down from the ceiling along the wall surface to largely circulate and convoke the room air, thereby warming the room. The present invention relates to an inexpensive indoor air recirculation device that makes uniform.

[0002]

[Prior art]

 When heating the interior of a building such as a home or office, the air that has been warmed and has a low specific gravity rises due to the convection phenomenon and stays near the ceiling. Since cold air with a large specific gravity falls, it is difficult to keep warm air in the entire room evenly. For this reason, there is a commercially available downward ventilation peripheral ventilation fan that is attached to a wall surface close to the ceiling and draws in hot air that has accumulated near the ceiling and blows it out to convection.

[0003]

[Problems to be solved by the device]

 The conventional peripheral ventilation fan for convection is attached to the wall of the room with the outlet facing downward, but the intake that has a wider width to attract warm air from a wide range sucks in air. The weak outlet, which has a wide width that just blows out, has no action to accelerate the air flow, so it is not possible to create a flow of recirculating air throughout the room simply by blowing down the warm air at the top. Convection circulation is not sufficient and it is difficult to make warm air uniform. Therefore, it is possible to increase the power of the ventilation fan, but in the case of a house, it is not always a good idea in terms of noise and maintenance costs. The present invention allows the flow velocity of warm air near the ceiling taken in by a fan with a small power to reach the opposite wall surface with less decrease, so that a strong air flow is applied to the wall to circulate and recirculate in the room. The entire room will be warmed uniformly at a reasonable cost.

[0004]

[Means for Solving the Problems]

 The present invention uses an inexpensive device to cause a high-speed recirculation effect on warm air near the indoor ceiling during heating. In front of the case body 2 of the small fan 1, a suction gap for sucking air from the surroundings. The blower tube 4 is supported across the space 3 and the small fan 1 is attached near the ceiling corner so that the front end of the blower tube 4 faces the opposite wall surface in the room, and the small fan 1 is operated to stay near the ceiling. When the warm air is taken in by the small fan 1 and sent to the blower cylinder 4, the surrounding warm air is also taken into the blower cylinder 4 by the negative pressure due to the flow velocity of the suction air gap 3, and the flow rate in the blower cylinder 4 is increased. To prevent the flow velocity from lowering, the flow velocity of the inlet portion is maintained at the outlet of the blower cylinder 4, and the air is ejected. Warm air that reaches the opposite wall is reflowed along the wall face to recirculate indoor air. Is obtained is characterized by a uniform warming.

[0005]

[Embodiment of device]

 In the present application, the amount of air taken in from the air gap of the small fan is increased to prevent a decrease in the flow velocity in the blower cylinder, and the air having a flow velocity substantially the same as the inlet of the blower cylinder is ejected at the outlet to blow air. It creates a warm airflow that reaches the wall of the room where the cylinders face each other, and uses a cheap device to cause a high-speed recirculation effect on the warm air near the indoor ceiling during heating. A blower tube 4 is supported in front by a suction gap 3 for sucking air from the surroundings, and the small fan 1 is mounted near the ceiling corner so that the front end of the blower tube 4 faces the opposite wall surface in the room. When the small fan 1 is operated and warm air that has accumulated near the ceiling is taken in by the small fan 1 and sent to the blower cylinder 4, the suction gap 3 also causes a negative pressure due to the flow velocity of the surrounding air to warm the surrounding environment. Sky Is taken into the blower tube 4, and the flow rate inside the blower tube 4 is increased to prevent the flow velocity from decreasing, so that the outlet of the blower tube 4 is ejected while maintaining the flow velocity at the inlet portion, and the warm air reaching the opposing wall is ejected. The indoor air is uniformly warmed by flowing it back and down along the wall surface.

That is, when the warm air is taken into the small fan 1 and passes through the suction air gap 3 at a required flow velocity, the warm air around it is sucked in to increase the air flow rate through the blower cylinder 4. In this case, since the cross-sectional area of the inlet and the outlet of the blower tube 4 does not change with respect to the flow rate, the flow rate does not change, but the increase in the flow rate makes up for a slight decrease in the flow rate. The outlet flow velocity is almost unchanged from the inlet flow velocity and is advanced by the length of the blower tube, and the warm air flow after ejecting the blower tube reaches the corner of the room even if the velocity is gradually reduced. Will keep the flow velocity to reach. The drive power of a small fan is extremely small, and the electricity bill is considerably small and economical. Therefore, even if it is an office or a room of a general household, it can be effectively returned in both summer and winter with little cost depending on the size, and uniform temperature control can be achieved.

In the case of a general household, the device of the present application has two tatami mats and two tatami mats, and when the room is wider, for example, when the span exceeds 7 m, they are installed facing each other from both corners of the room. The shape of the blower tube may be cylindrical or rectangular. According to the experiment, when the diameter of the case body 2 of the small fan 1 is 80 mm, the suction gap 3 is 50 mm, and the diameter of the blower cylinder 4 is slightly larger than the diameter of the case body, and the length is 200 mm to 250 mm, When the flow velocity in the area A around the entrapped void 3 becomes 2 m / s, the exit B of the blower tube 4 does not change to 2 m / s, and 1 m / s and 2 m ahead 1 m ahead of the blower tube. At 0.8 m 2 / s, and at 3 m ahead, it became 0.6 m / s, and a flow velocity that sufficiently reached the opposite walls of the room of 6 tatami mats was obtained, and an effective convection reflux effect was revealed. By the way, when only a small fan is used without installing a blower tube, the air flow immediately diffuses and the flow velocity of 2 m / s at the exit is 0.7 m / s at 1 m ahead and 0.4 m / s at 2 m ahead. , 3m ahead, it was not possible to reach the front wall by reducing the air flow to 0.2m / s. The device of the present application may be attached and fixed by screws, but for home use, a simple velvet fastener may be used.

[0008]

[Effect of device]

 The present invention is installed in warm air near the ceiling when heating the room and sends it out to a certain distance without reducing the air blowing speed from the small fan, and then sends it to the side of the wall to recirculate the room greatly, so the power is small. With a very small electricity cost of the electric fan, warm air that stays near the ceiling can be effectively recirculated and convected when heating a house or office, and the entire room can be evenly heated. It has the effect of saving energy.

[Brief description of drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a side view showing a use state of the present invention.

FIG. 3 is a plan view showing a usage state of the present invention.

FIG. 4 is a side view showing a usage state of the present invention.

[Explanation of symbols]

 1 Small fan 2 Case body 3 Suction space 4 Blower tube

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[Procedure amendment]

[Submission date] April 24, 1996

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

Claims (1)

[Scope of utility model registration request] 1. A blower tube is supported in front of a case body of a small fan with a suction gap for sucking air from the surroundings, and the front end of the blower tube is placed on opposite wall surfaces in a room. When installed near the corner of the ceiling so that the small fan operates and the warm air that has accumulated near the ceiling is taken in by the small fan and sent to the blower tube, the surrounding warm air is also sucked from the suction gap due to the negative pressure due to the flow velocity. By taking in the blower tube and increasing the flow rate in the blower tube to prevent a decrease in flow velocity, the outlet of the blower tube maintains the flow velocity of the inlet portion and ejects it, and warm air that reaches the opposite wall along the wall surface. An indoor air recirculation device characterized by uniformly warming the indoor air by flowing down and circulating.