JP2528970B2 - Turbulent forced hatachi type cleaning device on the inner surface of an air conditioning duct - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a turbulent flow forced-hatcher type cleaning device that cleans the inner surface of an air conditioning duct by using forced exhaust.

(Prior Art) Indoor air is constantly polluted as long as a person is present in the room and performs various office work or work, and the indoor air emits CO ₂ , heat, odors, cigarettes, or various kinds of air emitted by humans. If you continue to be contaminated with dust from work, you gradually feel uncomfortable,
Work ability is reduced and health is impaired.

In order to prevent these obstacles, that is, to maintain a good indoor environment, the Building Standards Act provides technical standards for ventilation in living rooms, or the Office Management Standards for Building Management Act and Occupational Safety and Health Act It defines indoor environmental standards.

However, the air conditioning equipment, which should have been installed to maintain the good indoor environment, has caused the following various problems in a building that has passed a considerable number of years in recent years.

(1) Fibers and other dust accumulate in the wind tunnel, which exceeds the holding limit, and part of the dust is separated and scattered due to the impact of the airflow when opening or closing the inspection port or damper,
It will contaminate food in high-class clothing or restaurants.

(2) Since the accumulated dust is often fibrous, it also causes a duct fire, and according to the inspection by the Tokyo Fire Department, it is 33 years within the jurisdiction of Tokyo in 5 years from 1972 to 1981.
A fire has been reported due to the air conditioning duct.

(3) As a cause of the decrease in ventilation capacity, there is a problem that the sound deadening material in the air-conditioning duct chamber, the elbow, etc. is peeled off to block the damper and the outlet, or cause the damper to malfunction. There is.

(4) Since the history of air conditioning equipment in Japan is shorter than that in Europe and the United States, it has hardly been a problem until now, but recently, microorganisms such as mold (fungus) and bacteria (bacteria) are propagated, It has become clear that this is scattered in the room by the air flow.

Against this backdrop, the Ministry of Construction evaluated the air-conditioning duct cleaning method technology, and issued an evaluation certificate for several points in August 1987. In addition, many other companies are currently conducting various kinds of research and implementing them. [Refer to, for example, literature: "Search for the current state of air-conditioning duct pollution,""Facilities and management," June 1987 issue, Takehisa Irie.] There are various cleaning methods for air conditioning equipment that are currently being implemented. However, there is a method in which the inner surface of the wind tunnel is defaced and cleaned by placing it on a suction airflow and blowing a tubular cloth. [For example: Reference: "Cleaning of ducts"
See Yoshio Kitahara, No. 59 “Building Equipment Safety News,” published by Japan Building Safety Center.

(Problems to be Solved by the Invention) However, according to the above-mentioned conventional cleaning method for the air conditioning equipment, as a result of the experiment, as shown in FIG. 4, the airflow in the wind tunnel is caused by the viscosity (friction resistance) of the inner surface of the duct. As the flow velocity in the center becomes faster, the pressure distribution in the duct becomes lower toward the center. This can be explained from Bernoulli's theorem, as shown in FIG.

As described above, when the central pressure is low, the windsink is in a state of being shrunk toward the center, and the windsink is only stroked on the inner surface of the duct, so that there is a problem that the inner surface of the duct cannot be strongly hit.

In order to solve the above problems, the present invention improves the cleaning effect of the inner surface of the duct by making the inner surface of the air-conditioning duct faster than the central part and by virtue of the hacking force to strongly hit the inner surface of the duct. It is an object of the present invention to provide a turbulent forced forced cleaning device for cleaning the inner surface of an air conditioning duct.

(Means for Solving the Problems) In order to achieve the above object, the present invention is a forced-hatcher type cleaning device for cleaning the inner surface of an air-conditioning duct by using forced exhaust, in which a frame made of a tough steel wire is used. An airtight cloth is laid on this frame, the cross-sectional shape is trapezoidal, the front part has an opening, and the rear part has a vent hole consisting of two round holes. The flow velocity of is faster than the flow velocity of the central part, and wind is blown,
And a cleaning header having a shape that causes turbulence in the downstream air, and provided at the rear of this cleaning header,
The air conditioner duct is provided with a hater that hits the inner surface of the duct.

(Operation) According to the present invention, as described above, in the forced-hatcher type cleaning device for cleaning the inner surface of the air conditioning duct (4) by using the forced exhaust air, the frame made of a tough steel wire and The frame is covered with airtight cloth, has a trapezoidal cross section, has an opening in the front (1a), and has a rear (1a)
In b), there is a vent hole (5) consisting of two round holes, and the flow velocity around the inner surface of the air-conditioning duct (4) is faster than the flow velocity in the central part, and the wind is entangled to cause turbulence. Since the cleaning header (1) having the above and the hatching (2) provided at the rear portion of the cleaning header (1) and hitting the inner surface of the air conditioning duct (4) are provided, the cleaning header (1) ), The flow velocity in the peripheral portion of the inner surface of the air conditioning duct becomes faster than the flow velocity in the central portion, and wind is entangled, and turbulence is caused in the downstream air,
The hatching (2) strongly hits the inner surface of the air conditioning duct (4), and can enhance the cleaning effect of the inner surface of the air conditioning duct.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a turbulent flow forced Hataki cleaning device on the inner surface of an air conditioning duct showing an embodiment of the present invention, and FIG. 2 is a rear view of a cleaning header of the turbulent flow forced Haataki cleaning device on the inner surface of an air conditioning duct. FIG.

In these figures, 1 is a trapezoidal (trapezoidal in cross section or side view) type cleaning header. A frame made of tough steel wire or the like is covered with air-tight cloth, and the front part of the cleaning header 1 is attached. In addition to having an opening in 1a, a rear header 1b of the cleaning header 1 has a vent hole 5 consisting of two round holes. With this configuration, as shown in FIG. 1, the flow velocity around the air conditioning duct 4 is as high as v _1, and at the center of the air conditioning duct 4 is as low as v ₂ .
Further, since the front portion 1a of the cleaning header 1 has an opening, and the rear portion 1b has a vent hole 5 consisting of two round holes, the cleaning header 1 has a cavity and allows the wind to enter. be able to.

In addition, 2 is a cloth hater provided in the rear part of the cleaning header 1 (windsock), 3 is the front part 1a of the cleaning header 1.
Is a wire attached to.

FIG. 3 is a diagram showing a mode of cleaning using the turbulent flow forced-hatcher type cleaning device for the inner surface of the air conditioning duct showing the embodiment of the present invention.

As shown in this figure, the cleaning header 1 is inserted into the air conditioning duct 4 to be cleaned, and the forced air exhaust is performed in the direction of the arrow 6. In other words, the exhaust fan 7 is equipped with a dust collector, has an opening in the main duct near the air conditioner, and is connected to this with an aluminum duct,
Exhaust air is forcedly exhausted by the exhaust fan 7.

Next, the operation of the turbulent forced forced cleaning device for cleaning the inner surface of the air conditioning duct of the present invention will be described.

The cleaning header 1 is inserted from the opening from which the air supply port (anemo etc.) attached to the air conditioning duct 4 to be cleaned is removed, or the hole 8 opened in the duct.

At the time of cleaning, the duct 9 and the like other than the cleaning location are closed, the air exhauster 7 is activated, and a wind flow of V = 15 to 20 m / s is created in the duct.

By the action of this forced air flow and the trapezoidal type cleaning header 1,
The flow velocity in the peripheral portion of the inner surface of the duct is increased as compared with that in the central portion, and a turbulent air flow is generated by the vent hole (vent hole) 5 provided in the rear portion 1b of the cleaning header 1. Due to this action, the cloth-made flycatcher 2 is strongly inspired to the outside, and the inside surface of the duct is struck and cleaned.

The dust that has been cleaned gets into the forced airflow and is collected by the medium-performance dust collection filter equipped in the air blower 7. Cleaning header 1
Prepare various types according to the shape and size of the duct. For example, as shown in FIG. 2, a duct having a rectangular cross section has a truncated pyramid shape, and a duct having a circular cross section has a truncated cone shape according to the inner diameter of each duct.

As shown in FIG. 1, the wind speed distribution in the duct downstream of the cleaning header 1 is indicated by v, but due to the shape of the cleaning header 1 (trapezoidal shape), the wind speed around the inside of the air conditioning duct is centered. It can be made larger than that. That is, the flow velocity around the air conditioning duct 4 is as high as v _1, and the flow velocity at the center of the air conditioning duct 4 can be as low as v ₂ .

In addition, the ventilation port 5 in the rear portion 1b of the cleaning header 1
As much as possible to disturb the air flow downstream of the cleaning header 1, the cloth hataki 2 is struck outward and
The turbulence in the downstream will make it flicker up, down, left and right.

Here, it is the shape of the cleaning header 1 and the ventilation port 5 of the rear portion 1b and the length L ₁ of the fly 2 that determine the effective action of the fly. That is, in the downstream portion of the cleaning header 1,
The shape of the cleaning header 1 is selected so that the wind speed becomes larger outside the center, but the wind speed distribution on the downstream side is the distance.
When it becomes long like L ₂ , the wind velocity distribution in the air conditioning duct returns to the natural flow, and the central part becomes large. Therefore, by experiment, L ₁ is selected so that the wind velocity outside the center is higher, and the length of the flycatcher is selected.

According to the result of the experiment, the conventional windsock type that is currently being used is in a state where the windsink is shrunk in the central portion, and the effect of the flycatcher cannot be obtained so much.

The present invention is not limited to the above-mentioned embodiment, and various modifications can be made based on the spirit of the present invention.
They are not excluded from the scope of the present invention.

(Effects of the Invention) As described in detail above, according to the present invention, since it is configured as described above, the following effects can be achieved.

(1) The cleaning header has a steel wire frame covered with a cloth that does not leak air, and has an opening in the front part and a vent hole in the rear part. By making the flow as turbulent as possible, it is possible to bang the cloth-made flycatcher to the outside and also to make it flutter up, down, left and right due to the turbulent flow.

(2) Although the cleaning header has a trapezoidal sectional shape and is simple in shape, the flow velocity of the peripheral portion of the inner surface of the air-conditioning duct is controlled by the action of the forced exhaust air and the cleaning header. It can be higher than the flow rate.

Therefore, a strong repulsive effect can be exerted, the cleaning effect on the inner surface of the air conditioning duct becomes very large, and the effect brought by this is significant.

[Brief description of drawings]

FIG. 1 is a block diagram of a turbulent flow forced Hatsuki type cleaning device for an air conditioning duct inner surface showing an embodiment of the present invention, and FIG. 2 is a turbulent flow forced Haataki type cleaning device for an air conditioning duct inner surface showing an embodiment of the present invention. Showing a rear portion of the cleaning header of FIG. 3, FIG. 3 is a view showing a mode of cleaning using the turbulent flow forced Hataki type cleaning device on the inner surface of the air conditioning duct showing the embodiment of the present invention, and FIG. 4 is a conventional air conditioning system. FIG. 5 is a diagram showing the flow velocity in the duct by the forced hatachi type cleaning device for the inner surface of the duct for use, and FIG. 5 is an explanatory diagram of Bernoulli's theorem. 1 …… Cleaning header, 1a …… Front part of cleaning header,
1b: Rear part of the cleaning header, 2 ... Hataki (windsock), 3 ... Wire, 4 ... Air conditioning duct, 5 ... Vent (vent), 7 ... Exhaust, 8 ... Hole, 9 ... Duct.

Claims (1)

(57) [Claims] 1. A forced-hatcher type cleaning device for cleaning the inner surface of an air-conditioning duct by using forced exhaust air, comprising: (a) a frame made of a strong steel wire and an air-tight cloth attached to the frame. The cross-sectional shape is trapezoidal, the front part has an opening, and the rear part has a vent hole consisting of two round holes, so that the flow velocity around the inner surface of the air-conditioning duct is faster than the flow velocity at the center part, An air conditioner characterized by comprising: a cleaning header having a shape that causes a turbulent air flow in the downstream air, and (b) a flycatcher provided at a rear portion of the cleaning header and hitting an inner surface of the duct. Turbulent forced hatachi type cleaning device on the inner surface of the duct.