JP7299035B2 - air purifier - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air purifier that cleans air taken from the outside by spraying a liquid and delivers the cleaned air into an indoor space.

2. Description of the Related Art Conventionally, air purifiers have been used to clean air in indoor spaces in offices, offices, amusement facilities, commercial facilities, medical/nursing facilities, or industrial facilities such as factories. As an example, for example, as shown in Patent Document 1, a trapping device that cleans the air with a blower (fan) that takes in dirty air and a liquid consisting of a chemical agent and water that is sprayed from a spray section (supply section). and a cyclone that separates liquid by centrifugal force generated by swirling air after cleaning. Specifically, when the dirty air is cleaned, inside the case of the capture device, the air is under strong pressure from the lower side of the outer case directly connected to the downstream side of the fan toward the upper side of the case. At the same time, the sprayed liquid is easily swirled up, and the fine particles of the liquid and the air are in a mixed state. Therefore, the liquid is separated from the air by sending the cleaned air together with the fine particles of the liquid into the inside of the cyclone communicating with the case, and the cleaned air is discharged from the exhaust port.

JP 2016-52653 A (pages 5 and 6, FIG. 1)

However, in the air purifier of Patent Document 1, although it is possible to prevent the air in the room from being excessively humidified and the liquid from scattering around due to the blown air, the air energized by the fan Because the air passes vigorously through the cyclone located downstream, creating a whirlpool, the kinetic energy of the air in the air purifier cannot sufficiently reduce the humidity. There is a problem of influence. In addition, since such an air purifier takes in the outside air and discharges the cleaned air into the room, the temperature and humidity of the cleaned air are greatly affected by the outside air. During the season, the cleaned air discharged from the air purifier raises the temperature and humidity of the air in the room to be cooled, resulting in a significant deterioration in cooling efficiency.

The present invention has been made by paying attention to such problems, and has the desired function of cleaning the indoor air, and by lowering the absolute humidity of the cleaned air, cleaning is performed without being affected by the outside temperature. To provide an air purifier capable of temperature control such as lowering the temperature of cleaned air.

In order to solve the above problems, the air purifier of the present invention
An air purifier comprising: a fan for sending air from an intake port toward an exhaust port; a case having openings communicating with the intake port and the exhaust port; and a supply unit for supplying liquid into the case There is
The fan is provided downstream of the case, and the case is provided with a liquid capturing portion that captures the liquid over a passage cross section of air passing through the case.
According to this feature, the pulling pressure of the fan provided on the downstream side of the case generates an air flow with a relatively uniform speed in the case, and the air removes the liquid adhering to the liquid capturing portion in the case. By passing through, foreign matter in the air can be captured and separated by the liquid, and the air can sufficiently exchange heat with the liquid, so this air can be cleaned and controlled to approach the desired temperature. can be done. Also, for example, in the cooling season, it is possible to lower the air temperature and lower the absolute humidity.

The liquid capture section is characterized by being a filter section that allows the liquid supplied by the supply section to percolate over substantially the entire passage cross section.
According to this feature, the liquid supplied from the supply unit is exuded over substantially the entire surface by the filter unit to generate a liquid film, so that air can pass through the liquid film to ensure heat exchange. Further, for example, in the cooling season, the air temperature can be lowered and the moisture in the air can be condensed to lower the absolute humidity.

The filter part is characterized by being made of a metal material formed in a linear, mesh, or plate shape.
According to this feature, the surface tension of the filter portion formed in a linear, mesh, or plate shape is used to easily generate a liquid film, and the heat of the liquid heat-exchanging with the air is received by the filter made of a metal material. Heat can be efficiently conducted through the portion.

The filter section is characterized in that it extends in a plane in a substantially horizontal direction.
According to this feature, since the filter section extends in the substantially horizontal direction orthogonal to the direction of gravity, the liquid capturing effect can be made uniform over the entire surface of the filter section.

The filter section is characterized in that it is provided in a plurality of stages in the air passage direction.
According to this feature, since the liquid film can be generated in multiple stages, it is possible to enhance the effects of cleaning and heat exchange.

A duct communicating between the case and the fan includes a throttle section having an air passage cross section smaller than the passage cross section in the case, and a water receiver for receiving moisture in the air passing through the throttle section. and are provided.
According to this feature, the air that has passed through the liquid film is allowed to pass through the constricted portion having a smaller passage cross section, thereby increasing the flow velocity of the air containing liquid and separating the liquid in the air.

The narrowed portion is characterized in that a cross section through which air passes is gradually narrowed from above to below.
According to this feature, a liquid having a higher specific gravity than air can be easily separated from the air by free fall.

A duct communicating between the case and the fan is provided with an ascending passage for generating an ascending flow of air.
According to this feature, it is easy to separate liquid having a large specific gravity from the rising air after washing.

1 is a perspective view showing an air purifier in Example 1. FIG. It is a schematic diagram showing each component which constitutes an air purifier. (a) is a top cross-sectional view showing a filter and a duct in the same horizontal position, and (b) is a top cross-sectional view showing a plurality of spray ports and the duct in the same horizontal position. (a) is a front cross-sectional view showing a case in which a filter and a spray port of the present embodiment are arranged, and (b) is a front cross-sectional view showing a case in which a filter and a spray port of a modified example are arranged; is. It is a schematic diagram showing the flow of air in the air purifier.

A mode for implementing an air cleaner according to the present invention will be described below based on an embodiment.

An air purifier according to an embodiment will be described with reference to FIGS. 1 to 5. FIG. In the following description, the front side of the air purifier is defined as the front side of the paper surface of FIG. Further, in this embodiment, the cross section through which the air passes means a plane perpendicular to the moving direction of the air moving through the passage in the air purifier. Further, in the present embodiment, description will be made on the premise that it is a cooling season such as summer when the outdoor temperature is high and indoor air conditioning by cooling is required.

The air purifier 10 of the present invention is used outdoors 60 including, for example, dust materials such as cigarette smoke and dust, or foreign substances such as viruses and pollutants such as PM2.5 (hereinafter sometimes simply referred to as "foreign substances"). Outside air A1 (outdoor environment), or mixed air of outside air A1 and circulating air R1 that circulates indoor 50 (indoor environment) (hereinafter, outside air A1 and mixed air may be collectively referred to as "outside air A1 etc." ) is selectively taken in, and the cleaned air A2 cleaned with a cleaning liquid 32d (liquid) made of water containing chemicals is sent indoors 50. In the present embodiment, a mode in which only outside air A1 is taken in for cleaning will be described below. Further, the air purifier 10 of the present invention cools by spraying the cleaning liquid 32d (liquid) onto the high-temperature outside air A1, etc. in the cooling season, and sprays the cleaning liquid 32d (liquid) onto the dry outside air A1, etc. It is an air purifier that has a heat exchange action that humidifies by The indoor 50 means, for example, the inside of an office, an office, an amusement facility, a commercial facility, a medical/nursing facility, or an industrial facility such as a factory.

As shown in FIGS. 1 and 2, the air purifier 10 includes a cleaning device 30 that traps smoke, dust, contaminants, etc. contained in outside air A1 taken in from an air inlet 21 that communicates with the outdoors 60. , a duct portion 40 (duct) connected to the downstream end of the cleaning device 30, and a fan F connected to the downstream end of the duct portion 40. As shown in FIG. The cleaned air A2 is sucked by the suction pressure of the fan F and sent out into the room 50 through the exhaust port 22, which is the discharge port of the fan F. The cleaning device 30, the duct portion 40, and the fan F that constitute the air cleaner 10 will be described below.

As shown in FIG. 2, the cleaning device 30 includes a main body 20 having a hollow case 25, a cleaning liquid supply section 31 (supply section) having a plurality of spray ports 31e for spraying cleaning liquid 32d in the case 25, It is composed of a replenishing section 32 for replenishing chemicals in the cleaning liquid 32d and a purifying section 33 for purifying the cleaning liquid 32d.

First, the main body 20 will be explained. As shown in FIG. 1, the main body 20 includes a frame E1, which is substantially square in top view and forms a framework of the main body 20, a case 25 attached to the frame E1, a cleaning chamber Z1 and a lower duct chamber. Z2 (induction chamber) and a plurality of (four in this embodiment) filters 37, 37, 37, 37, and the case 25 is made of a flat metal plate. The panel member 23f and the lid member 23g are attached to the ceiling portion in a hermetically sealed manner. The height dimension of the main body 20 and the height dimension of the case 25 are longer than the width and depth dimensions of the passage surface of the case 25 . The number of filters 37 installed in the case 25 is not necessarily limited to the present embodiment, and it is preferable to install an appropriate number of filters according to the season such as the cooling season. For example, by installing only one filter 37 and reducing the number of times of contact with the cleaning liquid 32d, it is possible to suppress the effect of capturing the moisture contained in the outside air A1 or the like, so the humidity of the cleaned air A2 can be maintained at a high level. can. Especially when the temperature of the cleaned air A2 is lowered by heat exchange, it is also possible to increase the relative humidity of the cleaned air A2 above that before cleaning.

Further, the bottom of the case 25 is separated from the floor G on which the air cleaner 10 is installed, and the frame E1 below is exposed from the bottom. A lower end portion of the frame E1 is fixed to the floor G by an anchor. The lower side of the case 25 of the frame E1 may also be covered with a panel, and casters may be attached to the lower end.

As shown in FIG. 1, the side portion of the case 25 is composed of flat panel portions 23a, 23b, 23c, and 23d in a substantially square shape when viewed from above. A portion 23e is detachably attached. The cleaning state of the outside air A1 inside the case 25 can be observed from the outside through the window 23e.

As shown in FIG. 1, a downward inverted L-shaped intake system duct 21a having a flange penetrates through the panel portion 23d in the thickness direction and is fixed inside the case 25 at the bottom of the panel portion 23d. . The intake system duct 21a has a straight portion extending outward from the panel portion 23d that penetrates the wall W and protrudes outward from the case 25 to communicate with the outdoors 60. The portion communicates with the interior 50, extends toward the inner side of the case 25, and further extends toward the panel member 23f that constitutes the bottom portion (see FIG. 2). The opening of the intake system duct 21 a on the outdoor 60 side is the intake port 21 , and the opening of the intake system duct 21 a on the indoor 50 side is the intake port 29 . Further, a passage switching means such as a valve (not shown) is provided inside the intake system duct 21a so that air can be taken in selectively from the intake port 21 on the outdoor 60 side or the intake port 29 on the indoor 50 side. there is

In addition, as described above, since the bottom of the case 25 is spaced from the floor G, the height position of the intake system duct 21a is also compared with that in which the bottom of the case 25 is installed on the floor G. are placed above the As a result, it is possible to make it difficult for dust or the like wiped up from the ground outdoors 60 to be drawn into the intake system duct 21a.

As shown in FIG. 2, a flat plate-like panel member 23f forming the bottom of the case 25 is provided with a drainage crate 27 which is one step lower than the panel member 23f and communicates with the inside and outside of the case 25 at substantially the center. A purification system pipe 33 a of the purification section 33 is connected to the drainage crate 27 . Although the panel member 23f is formed substantially horizontally in this embodiment, the panel member 23f is not limited to this and may be formed in a tapered shape that slopes downward toward the drainage basin 27, for example.

As shown in FIGS. 1 and 3A, on the ceiling of the case 25, a lid member 23g is formed in a tapered shape that slopes upward from each side toward the central portion when viewed from the top. A substantially square opening 26 is formed in the central portion of the cover member 23g in top view, and a flange 25e for connecting the duct portion 40 is formed around the opening 26. As shown in FIG.

As shown in FIG. 4, four pairs of opposing channel members 28, 28 formed in a U-shape when viewed from the side and extending in the front-rear direction are vertically fixed to the upper portion of the frame E1 inside the case 25. A filter 37 can be inserted into each pair of channel members 28, 28, and four filters 37, 37, 37, 37 can be inserted at maximum in this embodiment. These filters 37 can be accessed from the outside of the case 25 by removing the window portion 23e of the case 25, and maintenance such as cleaning and replacement of the filters 37 can be performed.

As shown in FIG. 3A, the filter 37 is made of metal. In this embodiment, a plurality of mesh members 37a formed of a plurality of stainless steel wires 37c are attached to a frame 37b made of stainless steel. The mesh members 37a are laid out without gaps, and the upper and lower sides of the mesh members 37a are sandwiched and held by mesh members having a coarse mesh. The mesh member 37a is formed three-dimensionally by entangling wire rods 37c formed of a large number of round bars or flat plates made of stainless steel to bulge in the planar direction and the vertical direction. 37c form a large number of pores H vertically, horizontally, or obliquely (see FIG. 5). The filter 37 may be made of other metal members or resin materials, and is not limited to stainless steel.

As shown in FIG. 5, the filter 37 is inserted into the interior of the case 25 so that, with the filter 37 as a boundary, a cleaning chamber Z1 positioned below, i.e., the upstream side, and a duct positioned above, i.e., the downstream side. It is divided into a lower chamber Z2. As shown in FIGS. 1 and 3A, the upper end of the lower duct chamber Z2 is tapered at a constant angle toward the opening 26 of the lid member 23g because the lid member 23g is provided. It is an inclined tapered space. In the cleaning chamber Z1, the outside air A1 before cleaning and the cleaned air A2 are mixed, and only the cleaned air A2 moves above the lowermost filter 37, that is, on the downstream side.

As shown in FIGS. 2, 3(b), and 4(a), the cleaning chamber Z1 has an upper end portion (lowermost stage) extending through the panel portion 23d of the case 25 in the plate thickness direction. The supply system discharge pipe 31d of the cleaning liquid supply unit 31 is disposed below the filter 37 of the cleaning liquid supply unit 31. As shown in FIG. The supply system discharge pipe 31d in the case 25 has a plurality of (five in this embodiment) forked pipes in the horizontal direction and in the front-rear direction, and the branched pipes are substantially parallel to each other at substantially equal intervals. (see FIG. 3(b)). Spray ports 31e are arranged at predetermined intervals in each of these pipes, so that the cleaning liquid 32d can be uniformly sprayed into the cleaning chamber Z1. The window 23e of the case 25 can be removed in the same manner as the filter 37 when performing maintenance such as cleaning or replacement of the spray port 31e. The supply system discharge pipe 31d of the cleaning liquid supply unit 31 may be disposed inside the case 25 through a portion other than the panel portion 23d, and is not limited.

Next, the purifier 33 will be described. As shown in FIG. 2, the purification unit 33 includes a water tank 33b into which cleaning liquid 32d after air washing flows and is stored through a purification system pipe 33a, and a water tank 33b connected to the water tank 33b through a purification system pipe 33c to store the water. A cleaning system pump P3 for pumping the cleaning liquid 32d from the tank 33b, and a cleaning liquid cleaning filter section 33e for removing dust from the cleaning liquid 32d which is connected to the cleaning system pump P3 through a cleaning system pipe 33d and pressure-fed from the cleaning system pump P3. , and the cleaning liquid purification filter portion 33e is capable of injecting water into the water tank 31b through the purification system pipe 33f. In this manner, by pouring the cleaning liquid 32d from the water tank 33b into the water tank 31b through the cleaning liquid purification filter section 33e, the cleaning liquid 32d can be maintained at a high degree of cleanliness for a long period of time. A purification system valve 33g for discharging the cleaning liquid 32d is connected to the purification system pipe 33c.

Next, the cleaning liquid supply section 31 will be described. As shown in FIG. 2, the cleaning liquid supply unit 31 includes a supply system discharge pipe 31d having a plurality of spray ports 31e, 31e, . The supply system pump P1 is mainly provided for pressure-feeding to the water tank 31b through the suction pipe 31a. As a result, the cleaning liquid 32d sucked up from the water tank 31b by the supply system pump P1 is pressure-fed to the spray port 31e and sprayed in the form of mist.

It should be noted that the cleaning liquid supply unit 31 is not necessarily provided below, that is, on the upstream side of, the lowermost filter 37 as in this embodiment. It may be provided above the uppermost filter 37, that is, on the downstream side. By doing so, the cleaning liquid 32 d discharged from the cleaning liquid supply section 31 arranged above the filter 37 reliably adheres to the filter 37 below, and the wire 37 c constituting the mesh member 37 a of the filter 37 is thin. A liquid film D is easily generated in the hole H.

Here, the surface area of the cleaning liquid 32d sprayed into the cleaning chamber Z1 is increased by forming countless fine particles in the form of a mist. As a result, the cleaning liquid 32d is evenly sprayed onto the outside air A1, so that foreign matter contained in the outside air A1 sent into the cleaning chamber Z1 is efficiently captured by the fine particles of the cleaning liquid 32d. In addition, the drug may have the effect of sterilizing pathogenic bacteria, microorganisms, etc. contained in foreign substances.

Next, the supply section 32 will be described. The supply unit 32 includes a drug storage unit 32a that stores a drug, and is connected to the drug storage unit 32a through a supply system pipe 32b to supply a liquid in which the drug is dissolved (higher in concentration than the cleaning liquid 32d) to the water tank 33b. It is mainly provided with a replenishment system pump P2 having a control function of . In this manner, the chemical is supplied from the supply unit 32 by the supply system pump P2 having a control function, so that the concentration of the chemical in the cleaning liquid 32d can be appropriately maintained. In addition, the chemicals are chlorine, hypochlorous acid, etc., and may be added with a perfume or the like for adding fragrance.

Here, replacement of the cleaning liquid 32d will be described. The cleaning liquid 32d that has become dirty by capturing foreign matter in the outside air A1 after being used for a predetermined period of time (for example, during business hours indoors 50) is collected in the water tank 33b of the purification unit 33, and then is removed from the purification system valve of the purification unit 33. All drained via 33g. Next, fresh water is injected into the empty water tank 33b through a water injection pipe (not shown), and a chemical solution having a concentration higher than that of the cleaning liquid 32d is supplied to the water tank 33b from the supply unit 32, so that the fresh water and the chemical solution are mixed. A cleaning liquid 32d having a predetermined concentration can be produced by mixing. In this way, the cleaning liquid 32d can be replaced with a new one. The new cleaning liquid 32d is supplied to the water tank 31b by the purification system pump P3, and is further sprayed from the spray port 31e by the supply system pump P1. It is preferable that the cleaning liquid 32d stored in the water tank 33b is equal to or larger than the amount necessary for stably performing continuous operation for a predetermined time. Furthermore, the concentration of the chemical contained in the cleaning liquid 32d may be appropriately adjusted by making it possible to adjust the amount of the liquid having a high concentration supplied from the supply section 32. FIG.

Next, the duct portion 40 will be explained. As shown in FIG. 1, the duct portion 40 includes a first duct 41 connected to a flange on the outer periphery of the opening 26 of the case 25, a second duct 42 connected to a flange downstream of the first duct 41, and a third duct 43 connected to a flange on the downstream side of the second duct 42 . Further, the downstream flange of the third duct 43 is connected to the upstream flange of the fan F. That is, in the air purifier 10, a passage through which air moves through the intake port 21, the inside of the case 25, the opening 26, the inside of the duct portion 40, and the exhaust port 22 is communicated. In this embodiment, the first duct 41, the second duct 42 and the third duct 43 are so-called square ducts having a substantially square passage surface shape (cross-sectional shape), but they may be round ducts or flexible ducts. may

The first duct 41 is curved laterally by approximately 90 degrees from the upper side toward the flange on the upstream side of the second duct 42 from the opening 26 of the case 25, and further curved approximately 90 degrees vertically downward. is formed.

The second duct 42 includes a narrowed portion 42a extending substantially vertically downward from a flange on the downstream side of the first duct 41, and further extending vertically downwardly from the narrowed portion 42a and upstream of the third duct 43. A water receiving portion 42b is formed which opens laterally toward the side flange. The narrowed portion 42a has four inner surfaces 42c that are inclined so that the passage of air is gradually narrowed from the top to the bottom, and continues to the water receiving portion 42b. A cover case 42d having an outer surface substantially flush with the first duct 41 and the water receiving portion 42b is fitted to the outside of the throttle portion 42a. Further, although the constricted portion 42a and the cover case 42d are made of steel in this embodiment, they may be made of a transparent material such as acrylic. The internal air passage can be visually confirmed from the outside of the air purifier 10. - 特許庁

In addition, the third duct 43 extends upward from the downstream side flange of the second duct 42 by bending approximately 90 degrees upward from the side, and opens sideways toward the upstream side flange of the fan F. It has a shape. That is, the third duct 43 is provided with an ascending passage for generating an ascending flow of air. Further, as shown in FIGS. 1 and 2, at the lower end (bottom) of the water receiving portion 42b of the second duct 42, there is a drain for discharging the cleaning liquid 32d and dew condensation adhered to the inside of the second duct 42. A valve 42f is attached.

Further, as shown in FIG. 3, the height dimension of the duct portion 40 (the height dimension of the first duct 41 and the second duct 42) is the width and depth dimension of the passage surface of the duct portion 40, the height of the main body 20 It is longer than the length dimension and the height dimension of the case 25 .

Further, as shown in FIG. 3, the width and depth dimensions of the passage surface of the duct portion 40 are shorter than the width and depth dimensions of the passage surface of the case 25, so that the duct portion 40 extends linearly. The passage area S2 at the portion is smaller than the maximum passage area S1 of the cleaning chamber Z1 of the case 25 (the passage area between the intake system duct 21a and the lowest filter 37). The area of the filter 37 and the maximum passage area of the duct lower chamber Z2 are substantially the same as the passage area S1.

Next, the fan F will be explained. The fan F is arranged at the most downstream side of the air passage of the air purifier 10, and the rotation of its blades generates a negative pressure on the upstream side to take in air, and the taken-in air is compressed to a high pressure. The positive pressure of the fan is a fan that sends out to the downstream side, and for example, a turbo fan, a sirocco fan, an axial flow fan, or the like is used. Incidentally, the fan F may be controlled so that its rotational speed is variable.

Further, since the fan F is mounted on a mount 49 higher than the water receiving portion 42b and is separated from the floor G, the height position of the exhaust port 22 is also higher than the floor G. are placed in As a result, dust and the like on the indoor floor G can be made less likely to be blown up as the cleaned air A2 is discharged from the fan F.

Next, the air flow in the air purifier 10 will be described in order from the intake port 21 on the upstream side toward the fan F on the downstream side.

First, by rotationally driving the fan F disposed on the downstream side of the air purifier 10, an air flow due to negative pressure is generated in the air purifier 10 on the upstream side of the fan F. Outside air A1 flows into the case 25 through the intake port 21 and the intake system duct 21a.

In this manner, air can be sent out from the intake port 21 to the exhaust port 22 by the pulling pressure of the fan F provided on the downstream side of the case 25 . In addition, since the fan F is arranged on the downstream side of the case 25, the outside air A1 can be taken into the case 25 through the intake port 21 even at a relatively low pressure, so that a reliable air flow can be generated.

Inside the intake system duct 21a, the movement speed and wind pressure of the outside air A1 are higher than those in the cleaning chamber Z1 on the downstream side, so that the fine particles of the cleaning liquid 32d are less likely to flow back inside the intake system duct 21a.

The portion of the passage area S1 in the cleaning chamber Z1 (between the intake system duct 21a and the lowest filter 37) is larger than the passage area S2 of the duct portion 40, so that the washed air A2 in the second duct 42 It's slower than your movement speed. Further, since it is upstream of the duct lower chamber Z2 and the filter 37, the air flow is stable.

Four filters 37, 37, 37, 37 are arranged on the upstream side of the lower duct chamber Z2. The airflow is evenly distributed. Although the moving speed increases toward the upper part of the lower duct chamber Z2, that is, toward the downstream side, heat is exchanged when passing through the filter 37, and fine particles of the cleaning liquid 32d are trapped, so the cleaning effect is maintained.

Next, as shown in FIGS. 4A and 5, cleaning of the air by the air purifier 10 will be described based on movement of the cleaning liquid 32d sprayed from the spray ports 31e, 31e, . The passage area S1 of the washing chamber Z1 where the spray ports 31e, 31e, . In addition to the fact that the moving speed is reduced and the pressure to move the fine particles of the cleaning liquid 32d sprayed into the cleaning chamber Z1 to the downstream side (front side) of the filter 37 together with the cleaned air A2 is not generated, Since the airflow passing through the filter 37 is stable, the fine particles of the cleaning liquid 32d fall to the bottom of the case 25 due to their own weight, so that many fine particles of the cleaning liquid 32d can be collected in the cleaning chamber Z1. can. More specifically, the cleaning liquid 32d sprayed under pressure into the cleaning chamber Z1 is subjected to a sedimentation force in the vicinity of the spray ports 31e, 31e, . . . Diffusion of particles etc. is dominant, and entrapment of fine dust particles occurs. Further, in the area where the sedimentation force and the resistance force (air moving speed) are in balance, fine dust and the like are taken in by diffusion migration and thermophoresis. can be collected inside. In particular, the direction of movement of the cleaned air A2 is vertically upward, and conversely, the direction in which fine particles of the cleaning liquid 32d fall is the direction of gravity, that is, the vertically downward direction, so that the cleaned air A2 moves vertically upward. It is easy to separate fine particles of the cleaning liquid 32d from.

In addition, when the fine particles of the cleaning liquid 32d are lifted up in the passage area S1 of the cleaning chamber Z1, they are captured by the filter 37 or join with the fine particles of the other cleaning liquid 32d. , the fine particles of the cleaning liquid 32d can be recovered in the cleaning chamber Z1. As a result, the cleaning liquid 32d can be recovered in the cleaning chamber Z1, and the air after a large amount of the cleaning liquid 32d has been recovered in the duct lower chamber Z2 can be guided to the duct portion 40.

That is, by increasing the passage area in the cleaning chamber Z1, the moving speed of the outside air A1 and the cleaned air A2 moving in the cleaning chamber Z1 can be evenly and uniformly cleaned by the pulling pressure. By keeping the dynamic pressure of the air low, it contacts with the cleaning liquid 32d adhering to the filter 37 to generate heat exchange, and the efficiency of removing the cleaning liquid 32d from the cleaned air A2 is high.

Here, even if foreign matter with a low specific gravity such as dust or feathers is lifted up, the filter 37 catches it, preventing it from moving downstream of the filter 37 together with the cleaned air A2. be able to. Furthermore, since the cleaning liquid 32d that has been swirled up adheres to the filter 37, the cleaning liquid 32d soaks into the foreign matter and increases in weight, so that the filter 37 separates and falls.

The filter 37 preferably has a mesh member 37a and a frame 37b made of stainless steel. can be easily washed away by the cleaning liquid 32d sprayed from the plurality of spray ports 31e. As a result, the filter 37 is less susceptible to contamination, and maintenance frequency can be reduced.

Furthermore, on the lower side of the cleaning chamber Z1, as described above, the moving speed of the air is faster than that of the portion of the passage area S1. This makes it easier for the fine particles of the cleaning liquid 32d that have fallen to bind to each other. As a result, the particles of the cleaning liquid 32 d become larger, and the weight of the cleaning liquid 32 d increases. In addition, since there is a large amount of the cleaning liquid 32d with large particles, the cleaning liquid 32d with large particles easily adheres to the foreign matter having a low specific gravity blown from the intake system duct 21a. Easy to remove.

Next, as shown in FIG. 5, the cleaned air A2, which has been cleaned with the cleaning liquid 32d as described above, does not completely drop, and part of the cleaning liquid rises in the cleaning chamber Z1 along with the cleaned air A2. 32d passes through the filter 37. During this passage, droplets of the cleaning liquid 32d sequentially adhere to the filter 37 due to their surface tension, and a liquid film D is generated so as to fill the pores H of the wire 37c forming the mesh member 37a of the filter 37. be.

When the cleaned air A2 passes through the filter 37 on which droplets of the cleaning liquid 32d are adhered or the liquid film D is formed, the cleaned air A2 exchanges heat with the cleaning liquid 32d adhering to the filter 37. to reduce temperature and humidity. Needless to say, the air temperature of the cleaned air A2 after cleaning the outside air A1 is affected by the outside air temperature. By exchanging heat between the depleted air A2 and the cleaning liquid 32d, which is around 20° C. at room temperature, it is possible to obtain the effect of cooling by several degrees to 10°.

In the heating season, by heating the temperature of the cleaning liquid 32d to a certain extent, the cleaned air A2, which has a low temperature due to the outside air temperature, exchanges heat with the thus heated cleaning liquid 32d, resulting in a temperature of several degrees Celsius. An effect of heating up to about 10° C. can be obtained.

The cleaning liquid 32d heat-exchanged with the cleaned air A2 as described above is stored in the water tank 33b. Incidentally, the water tank 33b is not limited to being arranged in the indoor 50 where the air purifier 10 according to the present embodiment is installed, and may be arranged in a predetermined location of a different temperature system from the indoor 50. good. In this way, the cleaning liquid 32d whose liquid temperature has been raised by heat exchange with the cleaned air A2 can be transferred to a temperature system different from the indoor 50, so that the air temperature in the indoor 50 is affected by the liquid temperature of the cleaning liquid 32d. can avoid receiving

Next, in the duct lower chamber Z2 beyond the filter 37, the passage area increases toward the upstream side, and the moving speed of the air on the passage surface decreases accordingly. In addition, the cover member 23g on the upstream side of the opening 26 of the case 25 has a tapered shape that inclines at a constant angle, and the suction wind pressure acts on the air in the duct lower chamber Z2 substantially uniformly. Since the moving speed of the air moving into the duct portion 40 from Z2 can be changed substantially uniformly, the turbulence of the air moving into the duct portion 40 from the duct lower chamber Z2 can be suppressed. This stabilizes the airflow in the duct lower chamber Z2.

Next, the cleaned air A2 that has passed through the lower duct chamber Z2 and the first duct 41 travels downward toward the narrowed portion 42a of the second duct 42 while maintaining a substantially uniform moving speed. Since the passage cross-section of the air passage is gradually narrowed in the narrowed portion 42a, the moving speed of the cleaned air A2 traveling downward in the narrowed portion 42a gradually increases. The moving speed of the water contained in the cleaning liquid 32d (hereinafter referred to as liquid content) also increases.

Subsequently, the cleaned air A2 that has passed through the lower end of the narrowed portion 42a advances into the water receiving portion 42b having an air passage cross section larger than that of the narrowed portion 42a, and the moving speed is reduced. At this time, since the liquid in the cleaned air A2 has a higher specific gravity than the cleaned air A2 and the gravitational acceleration acts downward, most of the liquid is separated from the cleaned air A2 and moves downward. It falls and adheres to the inner bottom surface of the water receiving portion 42b.

In this way, the narrowed portion 42a has a cross section through which the air passes is gradually narrowed from the top to the bottom, so that the liquid component having a higher specific gravity than the air can be easily separated from the air by free fall.

Next, the cleaned air A2 that has passed through the second duct 42 travels upward in the third duct 43 at a slower moving speed than in the narrowed portion 42a. At this time, since the liquid remaining in the cleaned air A2 has a large specific gravity as described above and gravitational acceleration acts downward, it cannot move upward with the cleaned air A2, and the cleaned air It separates from A2, falls downward, and adheres to the inner bottom surface of the water receiving portion 42b communicating with the third duct 43. As shown in FIG. The liquid adhering to the inner bottom surface of the water receiving portion 42b can be discharged to the outside of the air purifier 10 by intermittently opening the liquid discharge valve 42f.

In this way, the third duct 43 of the duct portion 40 communicating between the case 25 and the fan F is provided with an ascending passage for generating an ascending flow of air. It is easy to separate large liquids.

As described above, the cleaned air A2 cleaned by the air purifier 10 exchanges heat with the cleaning liquid 32d in the filter 37 to lower the air temperature to a certain extent, and the liquid is separated by the narrowed portion 42b and the third duct 43. , the air is blown into the room 50 from the exhaust port 22 of the fan F without increasing the humidity.

As described above, according to the air purifier 10 of the present invention, the suction pressure of the fan F provided on the downstream side of the case 25 generates an air flow with a relatively uniform speed in the case 25, and this The air passes through leaving the liquid adhering to the filter 37 as the liquid capturing portion in the case 25, so that foreign matter in the air can be captured and separated by the liquid, and the air can be sufficiently separated from the captured liquid. This air can be cleaned and controlled to approach the desired temperature. Moreover, in the cooling season as in this embodiment, it is possible to lower the air temperature and the absolute humidity.

In addition, the cleaning liquid 32d supplied by the cleaning liquid supply section 31 (supply section) is allowed to percolate over substantially the entire surface through the filter 37 to generate the liquid film D, and air is passed through the liquid film D to ensure heat exchange. be able to. Also, in the cooling season as in this embodiment, the air temperature can be lowered and the moisture in the air can be condensed to lower the absolute humidity.

In addition, the liquid film D is easily generated by utilizing the capillary action of the filter 37 formed of the wire 37c, and the cleaning liquid 32d adhering to the filter 37 comes into contact with the air and exchanges heat efficiently. Although thermal energy is stored, the specific heat of the cleaning liquid 32d has a great influence, and it takes time to raise the temperature. In addition, although not shown, it is possible to adjust the temperature to a desired level by properly supplying fresh water through a water supply pipe or the like. In addition, the filter 37 may be made of a mesh material formed in a mesh shape or a plate shape.

Furthermore, since the filter 37 extends in the substantially horizontal direction perpendicular to the direction of gravity, the effect of capturing the cleaning liquid 32d can be made uniform over the entire surface of the filter 37 .

In addition, since the filters 37 are provided in multiple stages in the air passage direction, the liquid film D can be generated in multiple stages, so that the effects of cleaning and heat exchange can be enhanced.

Further, in the duct portion 40 communicating between the case 25 and the fan F, a narrowed portion 42a having an air passage cross section having a smaller area than the passage cross section in the case 25 and an air passing through the narrowed portion 42a By providing the water receiving portion 42b for receiving moisture, the cleaned air A2 that has passed through the liquid film D is allowed to pass through the throttle portion 42a having a smaller passage cross section, and the cleaned air containing liquid The flow rate of A2 can be increased to separate this airborne liquid. In the present embodiment, the duct portion 40 has the narrowed portion 42a in which the cross section of the air passage is gradually reduced. It may be a straight-tube duct portion with a constant air passage cross section.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions within the scope of the present invention are included in the present invention. be

For example, in the above embodiment, the air purifier 10 has the air inlet 21 installed outdoors 60 and the air outlet 22 installed indoors 50. However, the present invention is not limited to this. The openings 22 may be arranged in one room and the other room separated by a wall, respectively, or may be arranged in the same room, and the arrangement location is not limited.

In addition, although the intake ports 21 and 29 and the exhaust port 22 have been described as a mode in which one is provided, they may be branched into a plurality. With this aspect of the intake port, since the suction pressure per one intake port is reduced, it is possible to make it difficult to draw in dust, paper waste, etc. with a large specific gravity. Even if it becomes difficult to take in A1, outside air A1 can be taken in from other intake ports. Further, with the exhaust port of this aspect, since the blowing pressure per one exhaust port is lowered, it is possible to make it difficult for users indoors 50 to feel uncomfortable due to the blowing of the cleaned air A2.

The case 25 has been described as a square box body made of a metal plate when viewed from the top. However, the case 25 is not limited to this, and may be formed in a substantially columnar shape or the like, or may be formed of wood or plastic. Also, a sound deadening material or a sound absorbing material may be provided to reduce noise.

As in this embodiment, the cleaning liquid 32d containing chemicals is preferable because it can suppress the generation of viruses and bacteria.

10 air purifier 20 main body 21 intake port 22 exhaust port 25 case 26 opening 30 cleaning device 31 cleaning liquid supply unit (supply unit)
31e spray port 32d cleaning liquid (liquid)
33 purification unit 33b water tank 37 filter (liquid capture unit)
37a Mesh member 37c Wire rod 40 Duct portion 41 First duct 42 Second duct 42a Constricted portion 42b Water receiving portion 43 Third duct (rising passage)

Claims (3)

An air purifier comprising: a fan for sending air from an intake port toward an exhaust port; a case having openings communicating with the intake port and the exhaust port; and a supply unit for supplying liquid into the case There is
The fan is provided on the downstream side of the case, and is provided in the case over a passage cross section of the air passing through the case from below to above, and captures the liquid supplied by the supply unit. The filter portion, which is a liquid trapping portion made of a metal material formed in a linear, mesh-like or plate-like shape and having a large number of fine pores vertically, horizontally, or obliquely, is vertically spaced apart in a plurality of stages. and
a constriction having an air passage cross-section having a smaller area than the air passage cross-section in the case; An air purifier, comprising: a water receiving portion for receiving moisture in the air passing through the portion; and a drain valve capable of discharging the water received by the water receiving portion to the outside. 2. The air purifier according to claim 1 , wherein the constricted portion is gradually constricted in cross section through which air passes from above to below. 3. The air purifier according to claim 1, wherein the duct is provided with an ascending passage for generating an ascending flow of air.

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