JP7351484B2 - dust removal duct - Google Patents

Description

The present invention relates to a dust removal duct that removes dust by forming a swirling air flow.

Conventionally, efforts have been made to save energy in air conditioning systems (for example, see Patent Document 1).

JP2008-281241A

In order to save energy, for example, it is possible to move the low temperature air near the floor upward during cooling. However, when such air movement is performed, there is a problem in that dust near the floor is spread into the space, which may deteriorate comfort.

Generally speaking, when moving air within a space, it has been required to remove dust before moving it.

The present invention was made to solve the above problems, and an object of the present invention is to provide a dust removal duct that can remove dust when moving air.

To achieve the above object, the dust removal duct according to the present invention has a suction port at one end, a horizontal duct arranged horizontally, a vertical duct arranged vertically, and an opposite side of the horizontal duct from the suction port. a connecting part that connects the end of the vertical duct with the lower end of the vertical duct, and a blowing part that blows air from the suction port toward the upper end of the vertical duct. The space has a first opening extending in the axial direction formed on the horizontal duct side, and a second opening formed at one end in the axial direction of the cylindrical shape, and the space has a space in which air from the horizontal duct is directed into the space. a cyclone part that introduces the air to form a swirling air flow; a guide part that is provided side by side with the cyclone part in the left-right direction and guides the air from the second opening of the cyclone part and the air from the horizontal duct to the vertical duct; , and a dust receptacle extending in the left-right direction is provided at a position through which the swirling airflow passes.

With such a configuration, dust in the air can be centrifugally separated by forming a swirling air flow by the cyclone part, and the dust can be collected in the dust receiving part. In this way, dust can be removed. As a result, comfortable air from which dust has been removed can be discharged from the vertical duct, and the air can be moved without impairing the comfort of the space. For example, by moving low-temperature air near the floor of the air-conditioned space to near the ceiling of the air-conditioned space during cooling, it becomes possible to save energy and improve comfort.

Further, in the dust removal duct according to the present invention, the guide portion is curved outward with respect to a straight line passing through the central axis of the cylindrical shape, and includes a first guide surface that guides air from the horizontal duct to the vertical duct, and a first guide surface that guides air from the horizontal duct to the vertical duct. a second guide surface that faces the first guide surface, is curved outward with respect to a straight line passing through the central axis of the cylindrical shape, and guides the swirling airflow from the cyclone portion to the first guide surface; The lower side of the second guide surface and the upper side of the first opening are located on a straight line extending in the left-right direction, and the dust receiving part is located on the lower side of the straight line extending in the left-right direction. Alternatively, the guide member may be provided so as to extend in the left-right direction across the cyclone portion and the guide portion.

With such a configuration, air can be guided to the vertical duct side using the first and second guide surfaces, and dust can also be removed below the second guide surfaces.

Further, in the dust removal duct according to the present invention, the connecting portion may include cyclone portions on both sides of the guide portion in the left-right direction.

With such a configuration, the range in which the swirling airflow is formed can be increased, and dust removal can be promoted.

Moreover, in the dust removal duct according to the present invention, the horizontal duct may be detachably connected to the connecting portion, and the dust receiving portion may be provided in the horizontal duct.

With such a configuration, by removing the horizontal duct from the connecting portion, it becomes possible to easily remove dust received by the dust receiving portion.

Furthermore, in the dust removal duct according to the present invention, the horizontal duct is placed on the floor, and when the horizontal duct is placed on the floor, the lower side of the inlet is spaced upward from the floor. It's okay.

With this configuration, the intake port of the horizontal duct can have a structure that makes it difficult to inhale dust from the floor. In this way, the cleaner the air that is taken in, the cleaner the air that exits the vertical duct.

Further, in the dust removal duct according to the present invention, an adhesive for adhering dust may be provided on the upper surface of the dust receiving part.

With such a configuration, it is possible to prevent the dust received by the dust receiving section from flying up again.

Further, in the dust removal duct according to the present invention, the opening area on the suction port side of the horizontal duct may be larger than the opening area on the opposite side.

With such a configuration, the air flow at the connecting portion can be made to flow faster than the air flow at the suction port. As a result, the speed of the swirling airflow can be increased, and the dust removal effect can be further enhanced.

According to the dust removal duct according to the present invention, dust can be removed by the swirling air flow formed by the cyclone section, and the air after movement can be made comfortable.

A perspective view showing the overall configuration of a dust removal duct according to an embodiment of the present invention A perspective view showing a horizontal duct in the same embodiment A side view showing a horizontal duct in the same embodiment A perspective view showing a connecting part in the same embodiment A perspective view showing the internal structure of the connecting part in the same embodiment. Longitudinal cross-sectional view of the cyclone section in the front-rear direction in the same embodiment A longitudinal cross-sectional view of the guide section in the front and rear direction in the same embodiment.

Hereinafter, a dust removal duct according to the present invention will be described using an embodiment. Note that in the following embodiments, components and steps denoted by the same reference numerals are the same or equivalent, and a repeated explanation may be omitted. The dust removal duct according to the present embodiment removes dust by swirling air flow when moving air.

FIG. 1 is a perspective view showing the overall appearance of a dust removal duct 1 according to the present embodiment. 2 is a perspective view of the horizontal duct 11, and FIG. 3 is a side view of the horizontal duct 11. FIG. 4 is an internal perspective view of the connecting portion 13. 5(a) is a perspective view showing the internal structure of the connecting portion 13, and FIG. 5(b) is a diagram showing the flow of air in the connecting portion 13. FIG. 6 is a longitudinal cross-sectional view of the horizontal duct 11 and the connecting portion 13 at the position of the cyclone portion 21a in the front-rear direction. FIG. 7 is a vertical cross-sectional view in the front-rear direction at the position of the guide part 22 with respect to the horizontal duct 11 and the connecting part 13.

In this embodiment, as shown in FIG. 4, the upstream side of the air flowing in from the inlet 13h of the connecting portion 13 is referred to as the front, the downstream side is referred to as the rear, the vertically upward side is referred to as the upper side, and vice versa. The direction is called downward, and when looking from the front to the rear, the right side is sometimes called the right direction, and the left side is sometimes called the left direction. Note that the front-back direction and the left-right direction are horizontal directions.

As shown in FIG. 1, the dust removal duct 1 according to the present embodiment includes a horizontal duct 11, a vertical duct 12, a connecting portion 13, and an air blowing portion 14. The horizontal duct 11 has a suction port 11a at one end and is arranged in the horizontal direction. The vertical duct 12 is a duct arranged in the vertical direction. The connecting portion 13 connects the end of the horizontal duct 11 opposite the inlet and the lower end of the vertical duct 12, and guides air from the horizontal duct 11 to the vertical duct 12. The air blower 14 blows air from the suction port 11a toward the upper end of the vertical duct 12. In this embodiment, the case will be mainly described in which the blowing section 14 is connected to the outlet side of the upper end of the vertical duct 12 and exhausts air from the exhaust port 14a. It may be provided at any location in the duct 1 from the inlet 11a of the horizontal duct 11 to the outlet of the vertical duct 12, or on the inlet 11a side of the horizontal duct 11 or the outlet side of the vertical duct 12. When another duct is connected, it may be provided in the duct to which it is connected.

In this embodiment, the case where the horizontal duct 11 is detachably connected to the connecting portion 13 will be mainly described. The connection between the horizontal duct 11 and the connecting part 13 may be performed by inserting the rear side (outlet 11b side) of the horizontal duct 11 into the inlet 13h of the connecting part 13. Note that in order to prevent air from leaking between the horizontal duct 11 and the connecting portion 13, a sealing member such as a rubber cushion is provided in the gap between the horizontal duct 11 and the inlet 13h of the connecting portion 13. It's okay to be hit. Further, in order to easily remove the horizontal duct 11 from the connecting portion 13, a pair of handles 11c may be provided at both ends of the suction port 11a in the left-right direction.

The horizontal duct 11 is usually placed on the floor and guides air near the floor to the connecting portion 13. Further, although the horizontal duct 11 is normally arranged in a horizontal direction, it may be arranged in an inclined direction, for example, depending on the inclination of the floor surface or the like. The cross section of the horizontal duct 11 may be, for example, rectangular or may have another shape.

The opening area of the horizontal duct 11 on the suction port 11a side may be larger than the opening area on the opposite side, that is, the outlet port 11b side. In this embodiment, this case will mainly be explained. As the opening area on the side of the suction port 11a is larger, the speed of the air at the outlet port 11b becomes faster than the speed of the air at the suction port 11a, and as a result, the swirling air flow described later is The speed will be faster. In addition, in order to make the opening area on the side of the inlet 11a larger than the opening area on the side of the outlet 11b, for example, the width of the inlet 11a may be wider in the horizontal direction, or even if the width in the vertical direction is wider. Well, it can be both. The opening area refers to the size of the opening. In this embodiment, as shown in FIGS. 2 and 3, the horizontal duct 11 has a wide section 11d that is wider, a transition section 11e that gradually narrows from the upstream side to the downstream side, and a transition section 11e that has a wider width. It has a narrow narrow part 11f, and an insertion part 11g that is inserted into the connecting part 13 when connected to the connecting part 13, and the horizontal width of the wide part 11d is equal to the horizontal width of the narrow part 11f. Assume that it is wider than . Note that although this embodiment shows a case where the wide portion 11d and the transition portion 11e of the horizontal duct 11 have a shape that is symmetrical in the left-right direction, this may not be the case. For example, depending on restrictions such as the installation location of the dust removal duct 1, the suction port 11a may be provided closer to one side in the left-right direction.

Further, when the lower side 11h of the suction port 11a is in contact with the floor surface, dust on the floor surface is easily sucked through the suction port 11a. Therefore, in order to prevent inhalation of such dust, in this embodiment, when the horizontal duct 11 is placed on the floor, the lower side 11h of the inlet 11a is located at a position spaced upward from the floor. I will mainly explain about. That is, in the present embodiment, as shown in FIG. 3, on the inlet 11a side of the wide portion 11d, the inlet 11a is inclined downwardly toward the rear from the lower side 11h of the inlet 11a at a position spaced upward from the floor surface. It has an inclined surface 11i. Note that the wide portion 11d does not need to have the inclined surface 11i, for example. In that case, for example, the wide portion 11d is provided with a front plate extending vertically toward the floor from the lower side 11h of the inlet 11a, and the lower side of the front plate is the front end of the bottom plate. It may be continuous. In this way, by separating the lower side 11h of the suction port 11a upward from the floor surface, the amount of dust on the floor surface that is sucked in from the suction port 11a can be reduced, and cleaner air can be inhaled. become able to. Note that the dust may include, for example, dust, or may include solids in the form of powder or small pieces.

A dust receiving section 15 is provided in the horizontal duct 11. For example, as shown in FIGS. 2 and 3, the dust receiving portion 15 may be provided at the uppermost downstream side of the horizontal duct 11 (above the outlet 11b). In this manner, since the horizontal duct 11 that can be attached to and detached from the connecting portion 13 has the dust receiving portion 15, dust received by the dust receiving portion 15 can be easily removed. An adhesive 15a for adhering dust may be provided on the upper surface of the dust receiving part 15, as shown in FIGS. 6 and 7. By adhering dust with the adhesive 15a, it is possible to prevent the dust received by the dust receiving part 15 from flying up again and flowing toward the vertical duct 12, and to prevent the air flowing out from the vertical duct 12. You will be able to keep it clean. Note that the adhesive 15a may be, for example, double-sided tape. Then, one adhesive surface may be attached to the upper surface of the dust receiving part 15, and dust may be attached to the other adhesive surface. Furthermore, as will be described later, the dust receiving section 15 may also receive condensed water.

The vertical duct 12 is typically arranged vertically along a wall or the like. In addition, from the viewpoint of moving air from the lower side of the air-conditioned space upward, it is preferable that the vertical duct 12 extends from the lower side of the air-conditioned space to the upper side. For example, in a certain room or space, the vertical duct 12 may be a duct extending from near the floor to near the ceiling. In this case, for example, the length of the vertical duct 12 in the longitudinal direction may be 1.5 meters or more, 2 meters or more, or 2.5 meters or more. On the other hand, when the air taken in from the suction port 11a is moved to another location, the vertical duct 12 does not need to be so long. In this case, the outlet side of the vertical duct 12 may be connected to another duct. The vertical duct 12 is typically a duct with a constant cross-sectional area in the longitudinal direction, as shown in FIG. Further, although the vertical duct 12 is normally arranged in the vertical direction (that is, in the vertical direction), it may be arranged in a direction inclined from the vertical direction, depending on the inclination of the wall surface, etc., for example. The cross section of the vertical duct 12 may be, for example, rectangular or may have another shape.

Note that, for example, the opening area of the upper outlet of the vertical duct 12 may be larger than the opening area of the outlet 11b of the horizontal duct 11. By doing so, the speed of the air moving upward in the vertical duct 12 can be slowed down, and heavier dust can be allowed to fall toward the connecting part 13 side.

Further, for example, a heat insulating material may be provided on the side surfaces (wall surfaces) of the horizontal duct 11 and the vertical duct 12. By doing so, it is possible to prevent condensation from occurring due to a temperature difference between the inside and outside of the horizontal duct 11 or the vertical duct 12.

As shown in FIG. 4, the connecting portion 13 has an inlet 13h opening toward the front on the lower front side, and an outlet 13i opening toward the upper rear side. , the vertical cross section in the front-rear direction connecting the two forms a substantially L-shaped air flow path. For example, as shown in FIG. 4, the flow path includes a rectangular bottom plate 13a extending rearward from the lower side of the inlet 13h, and a substantially trapezoidal bottom plate 13a extending upward from the left and right sides of the bottom plate 13a, respectively. A pair of side plates 13b, 13c, a bottom plate 13a, and a rectangular back plate 13d connected to each rear side of the side plates 13b, 13c, connecting the upper side of the inlet 13h and the front side of the outlet 13i. Also, a rectangular inclined plate 13e that connects the inclined sides of the side plates 13b and 13c and slopes upward from the front to the rear, and an inlet side upper surface plate 13f that connects the upper side of the inlet 13h and the lower side of the inclined plate 13e. , the outlet side front plate 13g may connect the front side of the outlet 13i and the upper side of the inclined plate 13e.

As shown in FIGS. 4 and 5, the connecting portion 13 is a cyclone portion that introduces air from the horizontal duct 11 into cylindrical spaces 32a and 32b whose axial direction is the left-right direction to form a swirling air flow. 21a, 21b, and a guide part 22 that guides air from the cyclone parts 21a, 21b and air from the horizontal duct 11 to the vertical duct 12. Note that the cyclone parts 21a and 21b are configured symmetrically with respect to the guide part 22. Further, if the two are not distinguished, they may also be referred to as the cyclone section 21.

The spaces 32a and 32b of the cyclone parts 21a and 21b are respectively formed by cylindrical members 31a and 31b whose longitudinal cross sections in the front and rear directions are approximately C-shaped. The cylindrical members 31a, 31b may be plate-shaped members curved so as to have first openings 33a, 33b extending in the axial direction, as shown in FIGS. 4 to 6. The cylindrical members 31a and 31b form a circumferential side surface shape of a cylinder. The first openings 33a and 33b of the spaces 32a and 32b are formed to face the horizontal duct 11, respectively. This is to allow air from the horizontal duct 11 to be introduced into the spaces 32a and 32b. Note that the axial direction is the direction of the central axis of the cylindrical shapes of the spaces 32a and 32b. In this embodiment, a case will be mainly described in which the central axes of the spaces 32a and 32b are on a straight line, but this need not be the case.

Second openings 34a, 34b are formed at one end of the cylindrical axial direction in the spaces 32a, 32b of the cyclone parts 21a, 21b, respectively. As shown in FIG. 5, the second openings 34a and 34b are provided on the guide portion 22 side. Further, the ends of the spaces 32a, 32b in the axial direction opposite to the second openings 34a, 34b are respectively closed by side plates 13b, 13c. Therefore, the spaces 32a and 32b are cylindrical spaces having first openings 33a and 33b and second openings 34a and 34b.

The cylindrical shapes of the spaces 32a and 32b only need to be substantially cylindrical, and do not need to be strictly cylindrical. The vertical cross-sectional shape of the inner circumferential surface of the cylindrical members 31a, 31b in the front-rear direction may be, for example, an elliptical shape with an open side on the first openings 33a, 33b side, a square shape with rounded corners, etc., as long as a swirling air flow can be formed. It may deviate from a perfect circle, as in

When the air from the horizontal duct 11 is introduced into the cylindrical spaces 32a, 32b, the air flows around the central axes of the cylindrical spaces 32a, 32b, toward the wall surface (i.e., the inner periphery of the cylindrical members 31a, 31b). plane), creating a swirling airflow. The swirling air flow will flow into the guide portion 22 via the second openings 34a, 34b. Note that low-velocity air near the center of the swirling air flow also flows into the guide portion 22 via the second openings 34a, 34b.

The guide portion 22 is provided side by side with the cyclone portions 21a and 21b in the left-right direction. That is, the cyclone parts 21a and 21b are present on both sides of the guide part 22 in the left and right direction, respectively. It is assumed that the guide portion 22 exists on the second opening 34a, 34b side of the cyclone portions 21a, 21b. The guide portion 22 guides the air from the second openings 34 a and 34 b and the air from the horizontal duct 11 to the vertical duct 12 . As shown in FIG. 5A, the guide section 22 is provided so as to be sandwiched between the cyclone sections 21a and 21b, and includes a first guide surface 22a and a second guide surface 22b. In this embodiment, the first guide surface 22a is formed by the inner peripheral surface of the first guide plate 41, and the second guide surface 22b is formed by the inner peripheral surface of the second guide plate 42. We will mainly explain the cases.

The first guide surface 22a is curved outward with respect to a straight line passing through the central axes of the cylindrical shapes of the spaces 32a and 32b, and the air from the horizontal duct 11 and the second guide surface 22b are connected to the first guide surface 22a. The air guided to the surface 22a is guided to the vertical duct 12. For example, as shown in FIGS. 4 and 7, the first guide plate 41 forming the first guide surface 22a has a lower side in contact with the bottom plate 13a, an upper side in contact with the back plate 13d, It may also be a plate-like member that is curved outward. Note that, as shown in FIG. 7, the first guide surface 22a may exist on the rear side of the straight line passing through the central axis of the cylindrical shape.

The second guide surface 22b is provided to face the first guide surface 22a. Further, the second guide surface 22b is curved outward with respect to a straight line passing through the central axis of the cylindrical shape of the spaces 32a and 32b, and guides the swirling airflow from the cyclone section 21 to the first guide surface 22a. do. As shown in FIGS. 4, 5, and 7, the second guide plate 42 forming the second guide surface 22b has an upper side fixed to the inclined surface plate 13e, and a lower side connected to the first opening. It may be a plate-like member that is curved toward the outside and located on a straight line extending the upper sides of 33a and 33b in the left-right direction. That is, as shown in FIGS. 4 and 5, the lower side of the second guide surface 22b and the upper sides of the first openings 33a, 33b may lie on one straight line 16 extending in the left-right direction. Note that, as shown in FIG. 7, the second guide surface 22b may be present on the front side of the straight line passing through the central axis of the cylindrical shape.

In this embodiment, it is assumed that the first guide plate 41 is integrally configured to be continuous with the cylindrical members 31a and 31b in the left-right direction, but this need not be the case. The first guide plate 41 and the cylindrical members 31a and 31b may be independent from each other. Moreover, both do not need to be continuous in the left-right direction. In that case, there may be a gap between the first guide plate 41 and the cylindrical members 31a, 31b, but the gap appropriately guides the swirling airflow in the spaces 32a, 32b toward the vertical duct 12. It is preferable that the gap is as large as possible. Note that although FIGS. 4 and 5 show the boundary line between the cylindrical members 31a and 31b and the second guide plate 42, when both are integrally constituted, the boundary line It doesn't have to be there.

The lower ends and part of the outer peripheral surface of the cylindrical members 31a and 31b may be fixed to the inner surfaces of the bottom plate 13a and the rear plate 13d, respectively, by screwing, adhesion, welding, etc., for example. Further, the ends of the cylindrical members 31a, 31b opposite to the second openings 34a, 34b may be fixed, for example, to the inner surfaces of the side plates 13b, 13c, respectively, by screwing, adhesion, welding, or the like. Further, the upper end and lower end of the first guide plate 41 may be fixed to the inner surfaces of the back plate 13d and the bottom plate 13a, respectively, by screwing, adhesion, welding, etc., for example. Further, the upper end of the second guide plate 42 may be fixed to the inner surface of the inclined surface plate 13e, for example, by screwing, adhesion, welding, or the like.

The air blower 14 may be controlled depending on the temperature, for example. Therefore, for example, the dust removal duct 1 includes a first temperature sensor that measures the temperature of the air at the position of the inlet 11a, and a height (for example, a vertical duct 12 a second temperature sensor that measures the temperature of the air at the outlet (e.g., the height of the outlet of the air outlet, the height of the exhaust port 14a of the air blower 14, etc.), and the temperature measured by the second temperature sensor is measured by the first temperature sensor. further comprising: a control unit that operates the blower unit 14 to control the air to flow from the suction port 11a to the upper end side of the vertical duct 12 when the temperature measured by the controller is higher than a predetermined threshold value; It's okay. Note that if the temperature measured by the second temperature sensor is not higher than the temperature measured by the first temperature sensor by more than a predetermined threshold, the blower 14 may be controlled not to operate. good. By doing so, the cold air near the floor can be moved to the upper space where the temperature is higher than that near the floor, and the temperature-related comfort of the space as a whole can be improved. Note that the predetermined threshold value is usually a real number larger than zero. For example, the threshold value may be set to the maximum error of the temperature sensor, or may be set to 2°C, 3°C, 5°C, or the like. Even if the air near the floor is moved upward when the difference in temperature measured by the first and second temperature sensors is small (for example, about 0.5 degrees Celsius), thermal comfort will not be as great. It is thought that it will not improve. Therefore, the threshold value is preferably set to a value that improves comfort regarding temperature when the dust removal duct 1 is operated. Further, it is preferable that the second temperature sensor measures the temperature at a position that is not affected by the air supplied by the dust removal duct 1 and near the position where air is supplied by the dust removal duct 1. For example, the second temperature sensor is provided at a position opposite to the exhaust port 14a of the blower section 14 shown in FIG. You may.

The dust receiving portion 15 extends in the left-right direction and is provided at a position through which the swirling air flow passes. Note that in the swirling airflow, dust is collected in the centrifugal direction due to centrifugal force, so it is preferable that the dust receiving portion 15 be provided at a position on the outermost circumferential side through which the swirling airflow passes. Therefore, as shown in FIGS. 6 and 7, when the horizontal duct 11 is attached to the connecting portion 13, the dust receiving portion 15 is provided with the cyclone portions 21a, 21b and the lower side of the straight line 16 extending in the left-right direction. The guide portion 22 may be provided so as to extend in the left-right direction. Note that it is preferable that the dust receiving portion 15 be located only on the outermost side of the cylindrical spaces 32a and 32b. This is to minimize the influence on the swirling airflow. Moreover, it is suitable that the dust receiving part 15 is provided over the entire cyclone part 21a, 21b and the guide part 22 in the left-right direction. As shown in FIG. 6, the outermost airflow of the swirling airflow in the cyclone parts 21a and 21b, that is, the airflow containing more dust, hits the upper surface of the dust receiver 15, causing the upper surface of the dust receiver 15 to become sticky. Dust becomes attached to the agent 15a. Further, as shown in FIG. 7, a part of the airflow guided by the second guide surface 22b toward the first guide surface 22a also hits the upper surface of the dust receiver 15, causing the upper surface of the dust receiver 15 to become sticky. Dust will adhere to the agent 15a. As a result, dust is removed from the airflow of the cyclone parts 21a, 21b and the guide part 22.

Furthermore, in the swirling airflow of the cyclone sections 21a and 21b, heavy, humid air gathers on the outside of the spaces 32a and 32b due to centrifugal force, and hits the dust receiving section 15. Then, dew condensation may occur on the upper surface of the dust receiving portion 15 and the like. For example, when low temperature air is introduced from the suction port 11a, dew condensation is more likely to occur. In addition, even after the dew condensation, the swirling airflow hits the dust receiver 15, causing some of the condensed water droplets to vaporize again, and at this time, the heat of vaporization is taken away, thereby cooling the dust receiver 15. Ru. As a result, dew condensation in the dust receiving portion 15 is promoted. Note that water droplets condensed on the dust receiving portion 15 may be drained to the outside of the connecting portion 13 via a drain (not shown). In this way, air can be dehumidified in the cyclone sections 21a and 21b. Note that in order to trigger dew condensation, a small amount of water may be supplied to the dust receiving section 15 at the start of the operation of the dust removal duct 1.

In this way, water droplets may form inside the connecting part 13 due to dew condensation, so the materials of each component of the connecting part 13 should be made of rust-resistant metals such as stainless steel, copper, or copper alloys, or metals with anti-rust treatment on the surface. Preferably, it is made of metal. In addition, when stainless steel is used, surfaces that come into contact with air, such as the inner circumferential surfaces of the cylindrical members 31a and 31b in the connecting portion 13 and the inner surfaces of the first guide plate 41 and the second guide plate 42, are A mirror finish may be applied to prevent dust from adhering. The mirror finish is, for example, No. It may also have a matte satin finish as shown in No. 6. In addition, No. If a finish with a higher reflectance than 6 (for example, No. 7 or No. 8 finish) is applied, static electricity is likely to occur, and this static electricity may cause dust to adhere to the metal surface. From the viewpoint of reducing dust adhesion to the surface, No. It is preferable to perform mirror finishing as shown in step 6.

Next, the overall air flow in the dust removal duct 1 will be briefly explained. By starting air blowing by the air blower 14, air flows from the suction port 11a of the horizontal duct 11 to the upper end side of the vertical duct 12. Air flowing in from the inlet 11a of the horizontal duct 11 is accelerated by narrowing the width of the duct at the transition portion 11e, flows out from the outlet 11b, and is introduced into the connecting portion 13. Among the air that has entered the connecting portion 13, the air within the range of the cyclone portions 21a and 21b in the left and right direction enters the cylindrical spaces 32a and 32b from the first openings 33a and 33b, respectively, and there, as shown in FIG. As shown, a swirling airflow will be created. Further, due to the centrifugal force of the swirling airflow, dust contained in the airflow collects in the centrifugal direction. Of the swirling airflow, the airflow on the outer circumferential side, that is, the swirling airflow containing more dust, repeatedly hits the dust receiver 15, so that the dust contained in the swirling airflow is provided on the upper surface of the dust receiver 15. It adheres to the adhesive 15a and is removed. In addition, in the swirling air flow, heavier air with high humidity also gathers in the centrifugal direction due to centrifugal force, and dehumidification may be performed by condensing on the dust receiver 15. The condensed water droplets may be drained, for example, by a drain (not shown). In addition, some of the condensed water droplets are vaporized by the swirling air flow, and at this time, the heat of vaporization is taken away, thereby cooling the dust receiving part 15. As a result, dehumidification of the swirling airflow that hits the dust receiving portion 15 is promoted. In addition, as the air is accelerated in the horizontal duct 11, the speed of the swirling airflow becomes faster and the centrifugal force becomes larger, so dust and high humidity air are collected in the centrifugal direction more effectively, and dust removal is carried out. It can enhance the dehumidification effect.

In the spaces 32a and 32b, the only air outflow ports are the second openings 34a and 34b on the guide part 22 side, so the swirling airflow gradually moves left and right and flows into the guide part 22. The swirling airflow that has entered the guide section 22 is guided by the second guide surface 22b and hits the dust receiving section 15 to remove dust, and is also guided to the first guide surface 22a, and then the first guide surface 22a. It is guided upward, that is, toward the vertical duct 12 by the guide surface 22a. In this way, clean air from which dust has been removed is exhausted through the vertical duct 12. Note that if the opening area of the upper outlet of the vertical duct 12 is larger than the opening area of the outlet 11b of the horizontal duct 11, the speed of air passing through the vertical duct 12 will be slower. Become. As a result, heavy dust cannot move upward and falls toward the connecting portion 13. This also facilitates dust removal.

As described above, according to the dust removal duct 1 according to the present embodiment, dust can be removed by the swirling air flow in the cyclone parts 21a and 21b. Therefore, comfortable air from which dust has been removed can be discharged from the vertical duct 12, and the air can be moved without impairing the comfort of the space. Further, the swirling air flow may also be able to perform dehumidification. In that case, comfortable air with low humidity can be exhausted from the vertical duct 12. In addition, for example, by moving the low-temperature air near the floor of the air-conditioned space to the upper side of the air-conditioned space during cooling, it is possible to improve the temperature-related comfort of the air-conditioned space with weaker air conditioning, promoting energy savings. You will be able to do this. Further, if the horizontal duct 11 is removable from the connecting part 13 and the horizontal duct 11 is provided with a dust receiving part 15, the dust received by the dust receiving part 15 is transferred to the horizontal duct 11. By removing it from the connecting portion 13, it can be easily removed.

Further, the dust removal duct 1 according to the present embodiment may be used, for example, at a place where a frozen showcase or a refrigerated showcase in a store or the like is installed. For example, a frozen showcase or a refrigerated showcase may be installed on the upper surface side of the horizontal duct 11. By doing so, the cold air flowing out from the frozen showcase or the refrigerated showcase can be efficiently collected by the dust removal duct 1, and furthermore, the dust can be removed and the air can be supplied to the upper side of the space. become. As a result, the air conditioning provided by existing air conditioning equipment can be made weaker, and energy conservation can be promoted. Further, in this case, for example, the dust removal duct 1 can also perform dehumidification.

In addition, although the said embodiment demonstrated the case where the dust receiving part 15 was provided over the whole cyclone part 21a, 21b and the guide part 22 in the left-right direction, this is not necessary. The dust receiving part 15 only needs to be provided at least in the position of the cyclone parts 21a and 21b, and does not need to be provided in the area of the guide part 22. In addition, from the viewpoint of removing more dust, it is preferable that the dust receiving part 15 is also present in the area of the guide part 22.

Further, in the above embodiment, the case where the horizontal duct 11 is detachably attached to the connecting portion 13 has been mainly described, but this may not be the case. The horizontal duct 11 may be fixed to the connecting part 13. In that case, the suction port 11a side of the horizontal duct 11 may be connected to another duct, and the handle 11c may not be attached to the suction port 11a. Moreover, in that case, the dust receiving part 15 does not need to be provided in the horizontal duct 11. The dust receiving part 15 may be provided in the connecting part 13, for example. Further, the dust received by the dust receiving part 15 may be removed by, for example, opening a door provided in the connecting part 13 that can be opened and closed.

Further, in the above embodiment, the case has been mainly described in which the opening area of the inlet 11a of the horizontal duct 11 is larger than the opening area of the outlet 13i, but this need not be the case. Both opening areas may be approximately the same. In that case, it is preferable to use a blower that blows a larger amount of air in the blower section 14.

Further, members similar to the second guide plate 42 may be present in the regions of the cyclone portions 21a and 21b, and these members may be configured integrally with the second guide plate 42. That is, a member similar to the second guide plate 42 may be provided throughout the cyclone parts 21a, 21b and the guide part 22 in the left-right direction. By doing so, the member can be fixed to the side plates 13b, 13c of the connecting portion 13, and the member can be attached more stably, and workability during attachment can be improved.

Further, in the above embodiment, a case has been described in which the guide portion 22 is provided with the second guide surface 22b, but this may not be the case. For example, the guide portion 22 does not need to have the second guide surface 22b. Even in that case, dust can be removed by the cyclone parts 21a and 21b, and air is guided to the vertical duct 12 side via the guide part 22.

Further, in the above embodiment, a case has been described in which the cyclone portions 21a and 21b are present on both sides of the guide portion 22 in the left-right direction, but this may not be the case. One guide section 22 and one cyclone section 21 may be arranged side by side in the left-right direction, or a plurality of guide sections 22 and a plurality of cyclone sections 21 may be arranged alternately in the left-right direction. Good too. Even with such a configuration, a swirling airflow is formed in the cyclone section 21, and the swirling airflow and air from the horizontal duct 11 flow out to the vertical duct 12 side via the guide section 22. Air flows from the horizontal duct 11 side to the vertical duct 12 side, and dust removal can be performed using the swirling air flow. In addition, when the guide parts 22 are present on both sides of the cyclone part 21 in the left-right direction, second openings communicating with the guide parts 22 are provided at both ends of the cylindrical space of the cyclone part 21 in the left-right direction. Alternatively, the second opening may be provided only at one end, and the other end may be closed by a plate-like member or the like.

Further, in the above embodiment, the cylindrical spaces 32a and 32b of the cyclone section 21 are formed by the cylindrical members 31a and 31b, respectively, and the first guide surface 22a and the second guide surface 22b of the guide section 22 are respectively formed by the first guide surface 22a and the second guide surface 22b. Although the case where the guide plate is formed by the first guide plate 41 and the second guide plate 42 has been mainly described, this may not be the case. For example, the spaces 32a, 32b, the first guide surface 22a, and the second guide surface 22b may be formed of a lump of metal. The formation may be performed, for example, by metal cutting or 3D printing.

Further, in the above embodiment, the case where an adhesive is provided on the upper surface of the dust receiving part 15 has been mainly described, but this is not necessarily the case. In that case, it is preferable that the dust receiving part 15 is provided with a structure to prevent the dust received in the dust receiving part 15 from flying up again. The configuration may be, for example, a trap structure that traps the dust received in the dust receiving part 15 so that it does not fly up, a filter that traps the dust in gaps between fibers, etc. It may be configured to adsorb.

Furthermore, in the above embodiment, a case has been described in which when the horizontal duct 11 is placed on the floor surface, the lower side 11h of the suction port 11a is located at a position spaced upward from the floor surface. good. For example, when the horizontal duct 11 is not placed on the floor or when there is almost no dust on the floor, the lower side 11h of the horizontal duct 11 may be at approximately the same height as the lower surface of the horizontal duct 11.

Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, and that various modifications can be made, and these are also included within the scope of the present invention.

As described above, according to the dust removal duct according to the present invention, it is possible to obtain the effect that dust can be removed by the swirling air flow formed by the cyclone section. It is useful as a duct for moving upward.

1 Dust removal duct 11 Horizontal duct 11a Inlet 12 Vertical duct 13 Connection part 14 Air blowing part 15 Dust receiving part 15a Adhesive 21, 21a, 21b Cyclone part 22 Guide part 22a First guide surface 22b Second guide surface

Claims (7)

a horizontal duct having an inlet at one end and arranged horizontally;
a vertical duct arranged vertically;
a connecting portion that connects an end of the horizontal duct opposite to the inlet and a lower end of the vertical duct;
an air blowing unit that blows air from the suction port toward the upper end of the vertical duct;
The connecting portion is
A cylindrical space whose axial direction is the left-right direction, wherein a first opening extending in the axial direction is formed on the horizontal duct side, and a second opening is formed at one end in the axial direction of the cylindrical shape. a cyclone section that introduces air from the horizontal duct into the space to form a swirling air flow;
a guide part that is provided side by side with the cyclone part in the left-right direction and guides air from the second opening of the cyclone part and air from the horizontal duct to the vertical duct;
A dust removal duct including a dust receiving portion extending in the left-right direction at a position through which the swirling air flow passes. The guide section is
a first guide surface that is curved outward with respect to a straight line passing through a central axis of the cylindrical shape and guides air from the horizontal duct to the vertical duct;
A second guide surface that faces the first guide surface, is curved outward with respect to a straight line passing through the central axis of the cylindrical shape, and guides the swirling air flow from the cyclone section to the first guide surface. a guide surface;
The lower side of the second guide surface and the upper side of the first opening are located on a straight line extending in the left-right direction,
2. The dust removal duct according to claim 1, wherein the dust receiving part is provided below one straight line extending in the left-right direction so as to extend in the left-right direction across the cyclone part and the guide part. The dust removal duct according to claim 1 or 2, wherein the connecting portion includes the cyclone portions on both sides of the guide portion in the left-right direction. The horizontal duct is removably connected to the connecting part,
The dust removal duct according to any one of claims 1 to 3, wherein the dust receiving section is provided in the horizontal duct. The horizontal duct is placed on the floor,
The dust removal duct according to any one of claims 1 to 4, wherein when the horizontal duct is placed on a floor surface, the lower side of the suction port is spaced upward from the floor surface. The dust removal duct according to any one of claims 1 to 5, wherein an adhesive for adhering dust is provided on the upper surface of the dust receiving part. The dust removal duct according to any one of claims 1 to 6, wherein the opening area on the suction side of the horizontal duct is larger than the opening area on the opposite side.

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