JP4844071B2 - Air purification device for residential ventilation unit - Google Patents

Description

  The present invention relates to a technology of an air purification device installed outside a ventilation unit for a house.

  Conventionally, an air purification device in a residential ventilation unit is generally provided with a filter inside a main body and collects insects and pollen contained in air introduced from the outside into the room. However, in an air purification device that employs such a method, the filter is quickly clogged, requiring frequent maintenance, and if maintenance is insufficient, contaminated air is introduced into the room. There was a problem that sometimes. In order to eliminate such problems, for example, as disclosed in Patent Document 1, an air purification apparatus for a residential ventilation unit that employs a cyclone structure capable of separating insects and pollen in the air from clean air is disclosed. Has been. In general, a cyclone is a method of purifying air by causing the passing air to flow spirally, separating dust such as insects and pollen by centrifugal force. Such an air purification device is desired to be an outdoor installation type because it is necessary to discharge collected insects and pollen to the outside without delay. If it is an outdoor installation type, the inside of a cyclone inevitably becomes a negative pressure by providing an air purification apparatus in an air supply duct and installing a blower fan indoors. Furthermore, in the air purification apparatus as described above, it is desirable to provide an automatic discharge mechanism that collects collected insects and pollen in one place and automatically discharges them in order to be maintenance-free.

  Patent Document 1 discloses an air purification device installed outdoors in a ventilation unit, and improves the maintainability by using a cyclone in the air purification device. The air purifier uses a cyclone (hereinafter referred to as a normal cyclone) having a cylindrical shape in the upper half and a conical shape in which the lower half is squeezed downward. Such a normal cyclone has a larger pressure loss and a larger installation space than an axial flow cyclone described later. When the pressure loss of the air purifier provided in the residential ventilation unit is large, the ventilation amount of the ventilation unit is reduced. Patent Document 2 discloses an air purification device using an axial flow cyclone. The axial flow cyclone is a cyclone in which the passing air spirally flows with a swirl blade fixed to the shaft, and since the direction of the airflow is not reversed like a normal cyclone, the pressure loss is small compared to a normal cyclone, The installation space is also small. However, in the air purifying device, the dust collected must fall in the cylindrical length of the first cyclone cylinder due to gravity, and finally the collection does not concentrate in one place. The method of collecting objects is inefficient.

In general, an air purification device using an axial flow cyclone is configured such that the direction of the air flow is from the upper side to the lower side because dust can be easily collected when accumulated downward. However, in air purification devices installed outdoors in residential ventilation units, adverse effects such as rainwater entering the air purification device or roof ridges becoming resistance to the suction port are expected if the suction direction is upward. Is done. Therefore, if the air purification device is configured such that the airflow direction is directed from the lower side to the upper side, it becomes difficult to collect dust. Patent document 3 is disclosing the dust collector using the axial flow cyclone made into the structure from which an airflow direction goes upwards from the downward direction. In the dust collector, a dust discharge case configured in a cylindrical shape is disposed close to the main body case, and discharges dust at the end of the separation process of dust and clean air. In this way, in the dust collector, after the dust is separated, it is immediately concentrated and sent to the dust discharge case so that it is efficiently collected. However, the dust that rises along the wall surface by centrifugal force inside the main body can flow out to the dust discharge case only at one end, and the collection efficiency is poor.
JP 2000-146251 A Japanese Patent Laid-Open No. 4-330954 JP 58-64142 A

  In an air purification device installed outdoors in a ventilation unit, it is desirable to use an axial flow cyclone rather than a normal cyclone from the viewpoint of low pressure loss and space saving. However, with the technology described in the above-mentioned patent documents, the current situation is that dust collection efficiency cannot be improved. In addition, it is desirable that the discharged dust is collected in one place in consideration of maintainability. Therefore, the problem to be solved is to improve the collection efficiency of the air purification device using the axial flow cyclone.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In claim 1, the air purification device (10) is configured by a triple cylindrical combination of the second cylinder (11), the first cylinder (15) and the dust separation case (12) in plan view. The first cylindrical body (15) is a cylindrical body having an upper surface and a lower surface opened, and an axial flow cyclone (14) is provided therein , and the second cylindrical body (11) is the first cylindrical body. A cylindrical body having a smaller diameter than that of (15) and open at both upper and lower ends is disposed substantially coaxially above the first cylinder (15), and the second cylinder (11) and the first cylinder ( 15) A dust separation case (12) having a diameter larger than that of the first cylindrical body (15) is disposed at a connection position with the first cylinder (15), and the dust separation case (12) is a cylindrical body closed at both upper and lower ends. The second cylinder (11) is inserted into the upper surface and the first cylinder (15) is inserted into the lower surface in the axial direction, and the dust separating case (1 The upper end surface of the first cylindrical body (15) inserted inside the dust separation case (12) is disposed above the lower end surface of the dust separation case (12), and is arranged on the outer peripheral surface of the dust separation case (12). A dust discharge case (13) communicated with the provided second opening (22) is provided, and air is conducted from the lower end of the first cylinder (15) to the upper end of the second cylinder (11). The dust discharge case (13) has a cylindrical shape, and the inner periphery of the dust separation case (12) and the dust discharge case (13) in a plan view of the second opening (22). On the common tangent to the circumference, a wall surface is provided which is continuous with the inner circumference of the dust separation case (12) and the inner circumference of the dust discharge case (13), and the upper surface of the first cylinder (15), A gap between the bottom surface of the two cylinders (11) is defined as a first opening (21), and dust (B) such as insects and pollen is used. The dusty outdoor air (A) flows from below the first cylinder (15) and passes through the axial flow cyclone (14) while spirally swirling. The dust (B) in (A) is guided to the inner wall (25) side of the first cylinder (15) by centrifugal force and inertial force, and at the outlet from the first cylinder (15). In the vicinity of a certain upper end, the dust (B) is swung in a concentrated manner along the inner wall (25), and a first opening between the first cylinder (15) and the second cylinder (11). The clean air (C), which is guided from (21) to the dust separation case (12) and from which dust (B) is removed from the dust-containing air (A), is guided to the second cylinder (11). Is.

  As effects of the present invention, the following effects can be obtained.

In claim 1, the air purification device (10) is configured by a triple cylindrical combination of the second cylinder (11), the first cylinder (15) and the dust separation case (12) in plan view. The first cylinder (15) is a cylindrical body having an upper surface and a lower surface opened, and an axial flow cyclone (14) is rotatably provided therein, and the second cylinder (11) A cylindrical body having a smaller diameter than the one cylinder (15) and open at both upper and lower ends is disposed substantially coaxially above the first cylinder (15). A dust separation case (12) having a diameter larger than that of the first cylinder (15) is disposed at a connection position with the cylinder (15), and the dust separation case (12) is closed at both upper and lower ends. It is comprised by a cylindrical body, the 2nd cylinder (11) is inserted by the upper surface, and the 1st cylinder (15) is axially inserted by the lower surface, The said dust separation An upper end surface of the first cylinder (15) inserted in the interior of the casing (12) is disposed above a lower end surface of the dust separation case (12), and the dust separation case (12) A dust discharge case (13) communicated with the second opening (22) provided on the outer peripheral surface of the first cylinder (15) is provided from the lower end of the first cylinder (15) to the upper end of the second cylinder (11). Since it is an air purification device for a residential ventilation unit that conducts air, low pressure loss and space saving of the air purification device can be realized.
Moreover, the collection efficiency of dust can be improved by providing the opening part to the dust accumulation case of a 1st cylinder in the 1st cylinder whole periphery.

In addition, since the lower surface of the dust retaining case is below the first opening, the dust does not re-flow into the first cylinder.
In addition, by collecting the dust in one place, it is possible to improve the maintenance of dust discharge in the air purification device.

In addition, the dust discharge case (13) is a cylindrical body, and in the plan view of the second opening (22), the inner periphery of the dust separation case (12) and the dust discharge case (13) On the common tangent line with the inner circumference, a wall surface is provided that continues to the inner circumference of the dust separation case (12) and the inner circumference of the dust discharge case (13), and the upper surface of the first cylinder (15); A gap between the lower surface of the second cylinder (11) is defined as a first opening (21), and outdoor dust-containing air (A) including dust (B) such as insects and pollen is The dust (B) in the dust-containing air (A) flows into the cylinder (15) from below and passes through the axial flow cyclone (14) while spirally swirling. In the vicinity of the upper end that is guided to the inner wall (25) side of the first cylindrical body (15) by the force and inertial force and is an outlet from the first cylindrical body (15), The dust (B) is concentrated and swung along the inner wall (25), and the dust (B) is dusted from the first opening (21) between the first cylinder (15) and the second cylinder (11). The clean air (C), which is guided to the separation case (12) and from which the dust (B) is removed from the dust-containing air (A), is guided to the second cylinder (11). In addition to the effect, the flow of dust-containing air (A) in the first opening (21) is rectified, so that the dust flows smoothly from the dust separation case to the dust discharge case. Efficiency can be improved.

  Next, embodiments of the invention will be described.

  FIG. 1 is a block diagram showing the overall configuration of a residential ventilation unit according to the present invention, FIG. 2 is a front view showing an air purifying apparatus according to an embodiment of the present invention, and FIG. 3 is a plan view. 4 is a perspective view of an axial-flow cyclone, FIG. 5 is a DD cross-sectional view in FIG. 3, and FIG. 6 is an EE cross-sectional view in FIG.

  As shown in FIG. 1, an air purification device 10 according to an embodiment of the present invention is a component of a ventilation unit 5 provided in a house 1, and includes a suction duct 6 opened to the outdoor side of the house 1. It is installed in the opening. For example, the ventilation unit 5 of the house 1 includes an air supply duct 6 and an exhaust duct 7 installed in an attic. The air supply duct 6 and the exhaust duct 7 are opened to the interior of the house 1 such as the ceiling of the living room 2 and the outside of the house 1. The air supply duct 6 and the exhaust duct 7 communicate indoors and outdoors. ing. In the attic, air blowing fans 3 and 4 are respectively provided in the middle of the air supply duct 6 and the exhaust duct 7, and the air supply amount of the air supply duct 6 or the exhaust duct 7 is adjusted by the air blowing fans 3 and 4, Necessary ventilation of room 2 is secured. The blower fans 3 and 4 are usually driven by a motor or the like. Thus, in the ventilation unit 5, one air circulation system is formed in the living room and outdoors, and the comfort of the house is enhanced.

  If it restrict | limits that the air purification apparatus 10 is outdoor installation, the structure of the ventilation unit 5 which is embodiment is not restricted to what was shown in FIG. By making the air purification device 10 an outdoor installation type, it is not necessary to pay attention to the discharge location of dusts such as pollen and insects separated from the air by the air purification device 10. That is, dust can be discharged from the air purification device 10 to the outside as it is. Furthermore, because of the structure of the ventilation unit 5, the outdoor-installed air purification device 10 is disposed on the outdoor side of the air supply duct 6, so that the air purification device 10 inevitably has the negative pressure side ( It is located on the upstream side of the blower fan 4.

  As shown in FIG.2 and FIG.3, the air purification apparatus 10 which is an Example of this invention is comprised by the combination of cylindrical shape. As shown in FIG. 2, the air purification device 10 includes a first cylinder 15, a second cylinder 11, a dust separation case 12, and a dust discharge case 13. The first cylinder 15 is a cylindrical body having an upper surface and a lower surface opened, and an axial flow cyclone 14 is provided therein. The second cylinder 11 is configured as a cylindrical body that is smaller in diameter than the first cylinder 15 and is open at both upper and lower ends, and is disposed substantially coaxially above the first cylinder 15. A dust separation case 12 is provided at a connection position between the second cylinder 11 and the first cylinder 15, and the dust separation case 12 is configured by a cylindrical body closed at both upper and lower ends. The second cylinder 11 has a first cylinder 15 inserted into the lower surface. The dust discharge case 13 is constituted by a cylindrical body closed at both upper and lower ends, and the outer peripheral surface of the dust discharge case 13 is provided continuously with the outer peripheral surface of the dust separation case 12.

  Here, it should be noted that the lower surface of the second cylinder 11 and the upper surface of the first cylinder 15 are both present inside the dust separation case 12, and the upper surface of the first cylinder 15 is dust. That is, it is arranged at a position higher than the inner lower surface 23 of the separation case 12. A gap between the upper surface of the first cylinder 15 and the lower surface of the second cylinder 11 is referred to as a “first opening 21”.

  As shown in FIG. 3, the dust separation case 12 and the dust discharge case 13 are connected in series, and one side of the inner periphery of the dust separation case 12 and the inner periphery of the dust discharge case 13 in a plan view. On the common tangent line on the (inflow side), a wall surface continuous to the inner periphery of the dust separation case 12 and the inner periphery of the dust discharge case 13 is provided. The opening that communicates the dust separation case 12 and the dust discharge case 13 is referred to as a “second opening 22”. As a matter of special note, the second opening is formed so that the dust flowing in the tangential direction of the inner wall along the inner wall of the dust separating case 12 is accommodated in the dust discharge case 13 while moving along the flow. It is necessary to select the side wall provided with 22 and the side wall is uniquely determined by the turning direction determined by the axial flow cyclone 14 described later. Furthermore, the diameters of the cylindrical first cylinder 15, the second cylinder 11, the dust separation case 12 and the dust discharge case 13 are the dust separation case 12, the first cylinder 15, and the second cylinder 11. In order of decreasing.

  As shown in FIG. 4, the axial flow cyclone 14 has a structure in which a shaft 17 is fixed inside a cylindrical body 19 whose upper and lower surfaces are opened, and a swirl vane 18 is provided. The swirl vanes 18 are not limited in terms of the number of sheets, the fixed angle to the shaft, and the inclination angle as long as the swirl vanes 18 can form a spirally flowing airflow from below. In this embodiment, the swirl vane 18 is provided in the axial flow cyclone 14, and the fixed angle α (see FIG. 4) to the shaft of each swirl vane 18 is 64.1 °. This structure is a structure in which the collection effect is experimentally optimized.

  In the air purification device 10 of the residential ventilation unit 5 having the above-described configuration, the collected insects and pollen can be discharged to the outside without delay by installing the air purification device 10 outdoors. Has improved. Moreover, in the air purification apparatus 10, by using the axial-flow cyclone 14 as a means for separating dust and gas to be employed, the pressure loss is small and the influence on the ventilation amount of the ventilation unit 5 is small. Further, the axial flow cyclone 14 can be reduced in size, and the installation space of the air purification device 10 can be reduced.

  FIG. 5 shows the flow of gas and dust in the air purification device 10. As shown in FIG. 5, the dust-containing air A is separated into dust B and clean air C by passing through the air purification device 10. For ease of explanation, in FIG. 5 and FIG. 6, the dust-containing air A is represented by a broken line arrow, the dust B is represented by a one-dot chain line arrow, and the clean air C is represented by a solid line arrow. Further, as described above, a forced air flow is formed in the first cylinder 15 and the second cylinder 11 from the lower side to the upper side by the blower fan 4 of the ventilation unit 5, and the inside of the air purification device 10 is negative. Pressure.

  Outdoor dust-containing air A containing dust B such as insects and pollen flows in from below the first cylinder 15 and passes through the axial flow cyclone 14 while spirally turning. Here, the dust B in the dust-containing air A is guided to the first cylindrical wall 25 side by the centrifugal force and the inertial force. In this way, in the vicinity of the upper end that is the exit from the first cylinder 15, the dust B separated from the dust-containing air A is concentrated and swirled along the first cylinder wall 25, and the first opening It is led from the part 21 to the dust separation case 12. On the other hand, the clean air C from which the dust B is removed from the dust-containing air A is guided to the second cylinder 11 and sent to the living room 2 through the air supply duct 6.

  In this way, by utilizing the structural characteristics of the axial flow cyclone 14 and the cylinders having different diameters of the second cylinder 11 and the first cylinder 15, dust is contained over the entire circumference of the first cylinder wall 25. By providing the first opening 21 for separating the dust B from the air A airflow, all the dust B rising along the first cylindrical wall 25 side is collected, and the collection rate Improvements are being made.

  As shown in FIG. 6, the dust B that has flowed into the dust separation case 12 follows the swirling airflow formed by the axial cyclone 14, and its centrifugal force and inertia force cause the inner side wall 20 of the dust separation case 12. This time, it turns downward (see FIG. 5). Although there is no obstacle for controlling the airflow in the dust separation case 12, the dust B that flows while turning from the first opening 21 also turns in the dust separation case 12 due to its inertia. The dust B swirling in the dust separation case 12 is guided to the second opening 22 having one side as a side wall where the dust separation case 12 and the dust discharge case 13 are in contact, and is guided to the dust discharge case 13. . Further, the dust B falls down the dust discharge case 13 due to its gravity, and is accumulated at the bottom (see FIG. 5).

  Thus, since the inner lower surface 23 of the dust separation case 12 is below the first opening 21, the dust B that has flowed into the dust separation case 12 moves downward in the dust separation case 12. Since it turns, the dust B once entering the dust separation case 12 does not return to the first cylinder 15 or the second cylinder 11. That is, since the dust B once separated can be reliably collected, the collection rate is improved.

  Moreover, in the dust separation case 12, the dust B can be collected in one place by the flow of the dust B flowing while turning and the connection shape of the dust separation case 12 and the dust discharge case 13. That is, since it is sufficient to discharge the dust B accumulated in the dust discharge case 13, the maintainability of the dust discharge is improved. Further, since there is no obstacle of the dust B flowing while turning the dust separation case 12 in the dust separation case 12, the dust B flows from the dust separation case 12 to the dust discharge case 13. The collection effect is improved by minimizing the resistance when doing so.

  Although a specific method for discharging the dust B from the air purification device 10 is omitted in this embodiment, it is considered that various methods can be applied because the dust B is concentrated and accumulated in one place. For example, the dust discharge case 13 of this embodiment is provided with an opening, an opening means provided with a shutter driven by a motor is provided in the opening, the motor is periodically driven by a timer, and the accumulated dust A method to discharge the wastewater can be considered.

  Regarding the air purification system for residential ventilation units, an air purification system using an axial flow cyclone with a small installation space and low pressure loss was introduced based on the desire for outdoor installation and easy maintenance. In the present embodiment, the shape of the constituent members of the air purification device was devised to enhance the dust collection effect, and the dust discharge part was provided in one place to improve the maintainability. Although this embodiment is applied to a residential ventilation unit, for example, it is also applied to an insect collecting device (equipped with a light emitting collecting device in the suction part), an incinerator waste device, or a factory dust collector. I think I can.

The block diagram which showed the whole structure of the ventilation unit for houses which concerns on this invention. The front view which showed the air purification apparatus which is the Example of this invention. FIG. The perspective view of an axial flow cyclone. DD sectional drawing in FIG. EE sectional drawing in FIG.

DESCRIPTION OF SYMBOLS 10 Air purification apparatus 12 Dust separation case 13 Dust discharge case 14 Axial flow cyclone 15 First cylinder 17 Axis 18 Swirling blade 21 First opening 22 Second opening

Claims (1)

The air purification device (10) is constituted by a triple cylindrical combination of the second cylinder (11), the first cylinder (15), and the dust separation case (12) in plan view, and the first cylinder The body (15) is a cylindrical body having an upper surface and a lower surface opened, and an axial-flow cyclone (14) is provided therein , and the second cylinder (11) has a smaller diameter than the first cylinder (15). The upper and lower ends of the cylindrical body are open, arranged substantially coaxially above the first cylinder (15), and the connection position between the second cylinder (11) and the first cylinder (15). Is provided with a dust separation case (12) having a diameter larger than that of the first cylinder (15), and the dust separation case (12) is constituted by a cylindrical body closed at both upper and lower ends. The second cylinder (11) is inserted into the lower surface of the first cylinder (15) in the axial direction, and inserted into the dust separation case (12). An upper end surface of the first cylinder (15) is disposed above a lower end surface of the dust separation case (12), and a second opening (22 provided on an outer peripheral surface of the dust separation case (12). ) To provide a dust discharge case (13) communicated with air from the lower end of the first cylinder (15) to the upper end of the second cylinder (11),
The dust discharge case (13) is a cylindrical body, and the inner periphery of the dust separation case (12) and the inner periphery of the dust discharge case (13) in the plan view of the second opening (22). On the common tangent line to the inner periphery of the dust separation case (12) and the inner periphery of the dust discharge case (13), and the upper surface of the first cylinder (15), the second The gap between the lower surface of the cylinder (11) is a first opening (21), and the outdoor dust-containing air (A) including dust (B) such as insects and pollen is the first cylinder. The dust (B) in the dust-containing air (A) flows in from below the body (15) and passes through the axial cyclone (14) while spirally swirling. The dust is guided to the inner wall (25) side of the first cylinder (15) by the inertial force, and near the upper end that is the outlet from the first cylinder (15). (B) is concentrated and swiveled along the inner wall (25), and the dust separation case from the first opening (21) between the first cylinder (15) and the second cylinder (11). Clean air (C), which is guided to (12) and from which dust (B) is removed from the dust-containing air (A), is guided to the second cylinder (11). Unit air purification device.

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