WO2022114150A1

WO2022114150A1 - Ground surface air return device and contaminant control system

Info

Publication number: WO2022114150A1
Application number: PCT/JP2021/043483
Authority: WO
Inventors: 詩蔡; 哲元王; 帆徐
Original assignee: ダイキン工業株式会社
Priority date: 2020-11-27
Filing date: 2021-11-26
Publication date: 2022-06-02
Also published as: CN114543333A

Abstract

Provided are a ground surface air return device and a contaminant control system including said air return device, which are useful in improving the suction efficiency of the air return device and ensuring the strength of an upper case when the overall height of the device is limited. A ground surface air return device according to the present invention includes: an upper case provided with at least one suction opening; a lower case provided with at least one discharge opening; and a fan assembly that is provided in a storage cavity formed by the upper case and the lower case, and air suction opening of which faces the upper case. The suction opening of the upper case substantially corresponds to the air suction opening of the fan assembly.

Description

Ground return device and pollutant control system

The present invention relates to a ground return air device and a pollutant control system including the return air return device.

In recent years, the problem caused by air pollutants in the target space such as indoors has become more and more important.

A typical air purifier is usually placed on the ground, sending air through an air outlet located at the top or top of the air purifier, taking in air from the side near the ground, and constantly circulating the air in the room. It purifies the air in the room. However, such a blowing method and an intake method stir all the air in the room, and the contaminants are diffused throughout the room. The fresh air system in a commercial office building has many air inlets and can be distributed in different locations, but usually there are only one or two centralized return ports on each floor and air containing contaminants. Passes through different stations and finally reaches the centralized return port. For pathogens of respiratory infections transmitted in the form of droplets or aerosols (eg, influenza virus, new coronavirus, etc.), the pollution control effect of the above-mentioned forms of air purification system is limited, and the air purification system is air circulation. Although it is possible to reduce the concentration of pathogens in the indoor space, it is not possible to completely eliminate the diffusion of pathogens in the indoor space, and by extension, the air purification system blows into the indoor space to diffuse the pathogens. , Increases the risk of transmission of the disease.

Therefore, a structure that can control contaminants in an indoor space and plays a role of blocking contaminants that exist in a local area of the space, for example, by preventing contaminants such as dust and pathogens from spreading to the surroundings. There is a need for equipment and systems that improve the above.

The inventor of the present application includes an upper case having a suction port and a lower case having an discharge port, and the storage cavity formed from the upper case and the lower case is provided on the ground with a fan assembly. Attempt to develop a return air device.

In the above-mentioned return air device, in order to improve the suction effect on air contaminants in the target space such as indoors, it is necessary to fully utilize the intake port of the fan assembly to form the largest effective suction area possible. Since the above-mentioned air return device is installed on the ground, when the upper case is stepped on, it is greatly deformed or broken, which affects the performance of the air return device and causes safety problems. In order to prevent this, it is necessary to ensure that the upper case portion exposed to the outer surface has sufficient strength.

The present invention has been made in view of the above-mentioned problems, and the present invention is useful for improving the strength of the ground return air return device, and further, when the height of the entire device is limited, the suction of the return air return device is performed. It is an object of the present invention to provide a ground return device and a contaminant control system including the return device, which improves efficiency and secures the strength of the upper case.

In order to realize the above-mentioned object, the present invention is formed from an upper case provided with at least one suction port, a lower case provided with at least one discharge port, and the upper case and the lower case. Provided is a ground return device provided in a storage cavity and comprising a fan assembly with an intake port directed toward the upper case, wherein the intake port of the upper case substantially corresponds to an intake port of the fan assembly.

Here, "the suction port of the upper case substantially corresponds to the intake port of the fan assembly" means that the main body portion of the suction port of the upper case is the intake port of the fan assembly, and 80% of the area of the suction port is the fan assembly. It is more preferable that the area of the suction port overlaps with the intake port of the fan assembly, and it is more preferable that 90% of the area of the suction port overlaps with the intake port of the fan assembly.

Further, the "intake port of the fan assembly" does not refer to the intake port of the fan itself when the fan assembly includes a fan (for example, a turbofan) and a conduction ring at the same time, but the intake port of the conduction ring. Refers to the air intake.

According to the ground return air device according to the present invention, the suction port of the upper case substantially corresponds to the intake port of the fan assembly, so that the suction efficiency (difference between intake speed and intake speed, actual suction port area, suction pressure loss, etc.) is determined. It is possible to avoid a decrease in the strength of the upper case due to the presence of a suction port portion that does not have a beneficial effect on (which can include elements). Specifically, because the space under the floor is limited, it is necessary to set the height of the entire device of the ground return device low, and the upper case and the upper surface of the fan assembly (the guide ring for the fan assembly). Is included on the top surface of the sirocco fan, but if the fan assembly contains a sirocco fan, it is on the top surface of the sirocco fan swirl casing as no need to provide a guide ring). Due to the small height (the height between the upper case and the top surface of the fan assembly is smaller if the fan assembly includes a guide ring), the area of the fan assembly intakes is the entire device. In the suction port portion of the upper case, which is substantially equivalent to the effective suction area of the suction port, that is, located near the outer edge of the intake port of the fan assembly in a plan view, the indoor air is affected by the suction force of the fan assembly. Although it can flow to the intake port of the fan assembly, if the outer edge of the intake port of the upper case is provided at a position further away from the intake port of the fan assembly in a plan view, the room air is above because it is far from the fan assembly. It is difficult to get inside the case, and even if it goes inside the upper case, it is difficult to keep moving into the intake port of the fan assembly. There is no beneficial effect on efficiency, but rather an increase in the area of the suction port reduces the strength of the upper case or the average air velocity of the entire suction port (if the air volume is constant, the suction port). As the area of the air increases, the wind speed decreases). On the other hand, according to the ground return device according to the present invention, the height of the entire device is increased by providing a suction port substantially corresponding to the intake port of the fan assembly, instead of providing an excessive suction port in the upper case. In limited cases, it becomes easy to improve the suction efficiency of the ground return air device and secure the strength of the upper case.

Here, the area of the intake port in the upper case may be equal to, slightly larger than, or slightly smaller than the area of the intake port of the fan assembly.

Further, in the ground return device according to the present invention, preferably, the fan assembly includes a turbofan, and when viewed along the vertical direction, the suction port avoids the central portion of the intake port of the fan assembly. ..

With the ground return device according to the present invention, the fan assembly includes a turbofan, and when viewed along the vertical direction, the suction port avoids the central part of the intake port of the fan assembly, so that most of the air intake is effective. The strength of the upper case can be further improved without affecting it. That is, when the fan assembly includes a turbofan, the suction air velocity at the center of the intake port of the fan assembly is very small, so no suction port is provided at the portion corresponding to the center of the intake port of the fan assembly of the upper case. As a result, the area of the closed portion of the upper case can be further increased and the strength of the upper case can be further improved with almost no effect on effective inhalation.

Further, in the ground return device according to the present invention, preferably, the suction port of the upper case has a first side side close to the outer edge of the upper case, and at least a part of the first side side is said. Corresponds to a position inside the air intake of the fan assembly, the edge of the air intake of the fan assembly, or outside the edge of the air intake of the fan assembly and close to the edge of the air intake of the fan assembly. At least a portion of the first side of the suction port is near the edge of the fan assembly intake port, i.e., indicating that the suction port body is entirely within the fan assembly intake port, the fan assembly intake port. It can be used extensively to achieve effective inhalation.

Here, the first side side may have various shapes such as a straight line, a polygonal line, and an arc.

Further, in the ground return device according to the present invention, preferably, at least one first partition member is provided in the suction port of the upper case, and the extension direction of the first partition member is the first side side. It is the same as the stretching direction of.

According to the ground return device according to the present invention, at least one first partition member is provided in the suction port of the upper case, and the stretching direction of the first partition member is the same as the stretching direction of the first side side. It is possible to prevent foreign matter from falling into the suction port of the upper case and improve safety, and at the same time, the first partition member acts as a reinforcing rib and improves the strength at the suction port of the upper case. can.

Further, in the ground return device according to the present invention, preferably, one of the first partition members is provided, and the inner edge of the first partition member corresponds to or corresponds to the outer edge of the intake port of the fan assembly. A plurality of the first partition members are provided, the plurality of the first partition members include a predetermined partition member, and the predetermined partition member is the closest to the first side side of the plurality of the first partition members. It is a partition member, or is a partition member second closest to the first side side of the plurality of first partition members, and the inner edge of the predetermined partition member corresponds to the outer edge of the intake port of the fan assembly. .. Here, the "outer edge of the intake port of the fan assembly" is the position of the narrowest inner diameter of the intake port of the fan assembly.

According to the ground return device according to the present invention, one first partition member is provided, the inner edge of the first partition member corresponds to the outer edge of the intake port of the fan assembly, or a plurality of first partition members are provided. The plurality of first partition members include a predetermined partition member, and the predetermined partition member is a partition member closest to the first side surface in the plurality of first partition members, or a plurality of first partition members. The inner edge of the predetermined partition member corresponds to the outer edge of the intake port of the fan assembly, so that the influence of the air viscosity is suppressed and the outer edge of the intake port of the upper case is suppressed. In addition to increasing the suction efficiency (suction efficiency of the suction port in the predetermined partition member), the difference in the suction air velocity at different positions inside the outer edge of the suction port of the upper case (suction of the suction port in the predetermined partition member). Helps reduce wind speed differences). That is, when the fan assembly includes a turbo fan and the outer edge of the intake port of the upper case is located outside the outer edge of the intake port of the fan assembly, when the fan assembly is activated, the suction port of the upper case is viewed in plan view. There is a velocity difference between the indoor air on both sides with the outer edge as the boundary surface, and due to the action of the viscosity of the airflow, the indoor air outside the low velocity boundary surface and the indoor air inside the slightly higher velocity interface surface (that is, , Suction airflow) rubs in the vicinity of the interface, reducing the velocity of the suction air at least near the interface. On the other hand, in the partition member (predetermined partition member) closest to the first side of the suction port, between the intake air flow toward the outside of the predetermined partition member and the intake air flow toward the inside of the partition member in a plan view. Since the friction generated is smaller than the outer edge of the intake port of the upper case, the speed of the intake air flow inside the predetermined partition member is less affected by the viscosity of the room air and can directly enter the intake port of the fan assembly. The suction action of the fan assembly can be satisfactorily converted into the suction air velocity to improve the intake efficiency, and the partition member inside the partition member closest to the first side side of the suction port (first from the last). In the partition member), the difference in the air velocity of the intake airflows located on both the inner and outer sides of the penultimate first partition member in a plan view becomes smaller, whereby the average of the suction port portions inside the predetermined partition member. While the wind speed can also be improved, if the outer edge of the intake port of the upper case corresponds to the outer edge of the intake port of the fan assembly, the speed of the intake air flow just inside the outer edge of the intake port of the upper case will decrease. , The intake port of the fan assembly cannot be fully utilized to form an effective intake.

Here, the fan assembly may include a turbofan or a sirocco fan (with an impeller, a swirl casing). Since the sirocco fan has a certain static pressure and is stronger in suction resistance than the turbo fan, when using the sirocco fan, the outer edge (first side side) of the suction port of the upper case should be the turbo fan. It can be provided slightly outside the case where it is adopted, and the effective intake area of the suction port of the upper case can be increased.
Further, in the ground return device according to the present invention, preferably, the suction port of the upper case further has a second side side away from the outer edge of the upper case, and the second side side is the fan assembly. Corresponds to the inside of the air intake.

Here, the second side side may have various shapes such as a straight line, a polygonal line, and an arc.

Further, in the ground return device according to the present invention, preferably, the second side side is arcuate, and the circle on which the second side side is located and the circle on which the first side side is located are circles. The hearts overlap.

According to the ground return air device according to the present invention, the second side side is arcuate, and the circle on which the second side side is located and the circle on which the first side side is located overlap with each other, that is, the upper case. Since the suction port is not provided at the upper case corresponding to the part from the second side of the suction port to the center of the intake port of the fan assembly, the strength of the upper case can be further improved, and at the same time, the intake air volume. It does not affect the intake air velocity, or it has a small effect on the intake air volume and the intake air velocity.

Further, in the ground return device according to the present invention, preferably, the first side side is arcuate, the intake port of the fan assembly is circular, and the circle where the first side side is located is circular. The center and the circular center of the intake port of the fan assembly are coaxial.

According to the ground return air device according to the present invention, the first side surface is arcuate, the intake port of the fan assembly is circular, and the center of the circle where the first side side is located and the intake port of the fan assembly. Since the center of the circle is coaxial, air flows more smoothly from the suction port of the upper case to the intake port of the fan assembly, reducing pressure loss, increasing suction efficiency, and easily reducing operating noise.

Further, in the ground return device according to the present invention, preferably, the diameter of the circle where the first side side is located is the same as the diameter of the intake port of the fan assembly, or the position of the first side side. The diameter of the circle is slightly larger than the diameter of the air intake of the fan assembly.

Here, when the diameter of the circle where the first side side is located is larger than the diameter of the intake port of the fan assembly, preferably, the diameter of the circle where the first side side is located and the diameter of the intake port of the fan assembly are used. The difference is 2 cm or less. The reason why the diameter of the circle where the first side side is located is larger than the diameter of the intake port of the fan assembly is to fully utilize the long suction port portion of the suction port of the upper case toward the outside. This is because there is a certain pressure loss even at the edge of the first partition member, and the suction port portion (suction groove) having a longer length than the suction port portion (suction groove) having a shorter length has a smaller pressure loss. Is.

Further, in the ground return device according to the present invention, preferably, at least one second partition member is provided at the suction port of the upper case, and the second partition member has the diameter of the intake port of the fan assembly. It was provided along the direction.

According to the ground return device according to the present invention, at least one second partition member is provided at the suction port of the upper case, and the second partition member is provided along the radial direction of the intake port of the fan assembly. The strength of the suction port of the upper case can be further improved.

Further, in the ground return device according to the present invention, preferably, the second partition member is uniformly distributed, or the length of the second partition member is the radial length of the suction port of the upper case. Smaller than that, the plurality of second partition members were provided alternately in the radial direction.

Further, in the ground return device according to the present invention, preferably, a plurality of suction ports of the upper case are provided, and the different suction ports are close to each other.

Since the ground return air device according to the present invention is provided with a plurality of suction ports of the upper case, the suction ports of the upper case increase the effective actual suction area by covering the intake ports of the fan assembly as much as possible. When the different suction ports are close to each other, the suction amount (suction efficiency) can be improved, and the deceleration of the wind speed due to the air viscosity at the adjacent sides of the different suction ports can be weakened to some extent.

Further, in the ground return device according to the present invention, preferably, the plurality of suction ports of the upper case are provided symmetrically and / or uniformly with respect to the central axis of the intake ports of the fan assembly.

Further, in the ground return device according to the present invention, preferably, the fan assembly includes a turbofan and a guide ring, and in the vicinity of the inner edge of the guide ring, a guide toward the intake port of the turbofan. A flow section was provided.

According to the ground return device according to the present invention, the intake port of the upper case is provided because the turbofan and the guide ring are included and a guide portion toward the intake port of the turbofan is provided in the vicinity of the inner edge of the guide ring. It is easy for air to flow smoothly from the turbofan to the intake port, reducing pressure loss, increasing intake efficiency, and reducing operating noise. In particular, when the suction port of the upper case is provided with the first partition member and the outer edge of the suction port of the upper case is outside the outer edge of the intake port of the fan assembly, just inside the outer edge of the suction port of the upper case. After entering the ground return device from the suction port of the upper case, the suction airflow flowing through the air flow toward the suction port of the fan assembly along the flow guide ring, and flows laterally due to the guide action of the flow direction portion. Flows substantially downward, reducing airflow interference at the air intake of the fan assembly on both sides of the first partition member closest to the outer edge of the air intake of the upper case, and of the air intake of the upper case. The vortex at the intake port of the fan assembly of the intake air flow just inside the outer edge is also reduced, and the intake air velocity is indirectly improved.

Further, in the ground return device according to the present invention, preferably, the guide portion extends into the intake port of the turbo fan, and when viewed along the vertical direction, a region surrounded by the inner edge of the guide portion. Assuming that the area of A1 is A1, the area of the area surrounded by the outer edge of the intake port of the upper case is A2, and the area of the area surrounded by the outer edge of the intake port of the turbo fan is A3, then A1 <A2 and , A1 <A3.

According to the ground return air device according to the present invention, the air guide portion extends into the intake port of the turbo fan, and when viewed along the vertical direction, the area of the region surrounded by the inner edge of the air guide portion is set to A1, and the upper case. Assuming that the area of the area surrounded by the outer edge of the suction port of the turbo fan is A2 and the area of the area surrounded by the outer edge of the intake port of the turbo fan is A3, A1 <A2 and A1 <A3, so that the entire suction is performed. The air flow is throttled at the flow guide and diffused at the intake port of the turbo fan, so that the air flow at the intake port of the turbo fan becomes more uniform.

Further, in the ground return air device according to the present invention, the conduction portion is preferably arcuate.

According to the ground return air device according to the present invention, since the flow guide portion is arcuate, air flows more smoothly from the suction port of the upper case to the intake port of the turbofan, reducing pressure loss and increasing suction efficiency. At the same time, it is easy to reduce operating noise.

Further, in the ground return device according to the present invention, an electric component storage cavity is preferably further included, and an electric component for controlling the fan assembly is housed in the electric component storage cavity. , Provided in the lower case, or provided separately from the lower case on the lower case side, or the upper case includes a protrusion, and the electrical component storage cavity is inside the protrusion. Been formed.

According to the ground return air device according to the present invention, the electrical component storage cavity is provided in the lower case, is provided separately from the lower case on the lower case side, or the upper case includes a protrusion to store electrical components. Since the cavity is formed inside the protrusion, it is easy to prevent water from coming into contact with the electrical components in the electrical components storage cavity even if water accidentally spills into the suction port and is sucked into the storage cavity by the fan assembly. Therefore, electrical safety can be improved.

Further, in the ground return device according to the present invention, preferably, the protrusion is located in the center of the upper case, and the suction port is provided on both sides or around the protrusion and is provided symmetrically. rice field.

Further, in the ground return device according to the present invention, preferably, the fan assembly includes a plurality of sirocco fans distributed and provided in a horizontal plane.

According to the ground return device according to the present invention, since the fan assembly includes a plurality of sirocco fans distributed in a horizontal plane, when a part of the intake port of the upper case is stepped on by a human foot, that is, Even if a part of the effective suction port of the sirocco fan is shielded, the remaining unshielded sirocco fan can also be sucked at a normal wind speed or the like.

Further, in the ground return air device according to the present invention, the upper case is provided with a plurality of suction ports corresponding to the plurality of sirocco fans, and the discharge port of the upper case substantially corresponds to the intake port of the sirocco fan. do.

Since the ground return air device according to the present invention is provided with a plurality of suction ports corresponding to a plurality of sirocco fans, when one of the suction ports is blocked by a human foot, the remaining sirocco fans are supported. The suction port can still be sucked at a normal wind speed or the like.

Further, in the ground return device according to the present invention, preferably, the electric component storage cavity is provided between a plurality of the sirocco fans.

According to the ground return air device according to the present invention, the electrical component storage cavity is provided between a plurality of sirocco fans, so that even if a liquid such as water enters the device through the suction port, the electrical component is damaged. Hateful.

Further, in the ground return device according to the present invention, preferably, the fan assembly includes a turbofan, and the center of the intake port coincides with the center of the upper case when viewed along the vertical direction. ..

Further, in the ground return device according to the present invention, preferably, the fan assembly includes a sirocco fan, and the center of the intake port is deviated from the center of the upper case when viewed along the vertical direction.

Further, in the ground return device according to the present invention, the ratio of the total area of the intake port of the upper case to the area of the intake port of the fan assembly is preferably 1.3: 1 or less, more preferably. , 1.2: 1 or less, more preferably 1.1: 1 or less (that is, the area of the intake port is slightly larger than the area of the intake port), still more preferably 1: 1 or less. There is (ie, the area of the intake port is the same as the area of the intake port, or the area of the suction port is slightly smaller than the area of the intake port). Here, the total area of the suction port is the sum of the areas formed by being surrounded by the outermost edges of each suction port, and is not the actual suction area excluding the partition member provided in the suction port. ..

With the ground return device according to the present invention, the ratio of the total area of the suction port of the upper case to the area of the intake port of the fan assembly is 1.3: 1 or less, so that the maximum suction efficiency and the optimum strength of the upper case are obtained. Helps to secure.

Further, in the ground return device according to the present invention, the distance between the lower surface of the upper case and the upper surface of the diversion ring or the spiral casing is preferably 3 cm or less, more preferably 2 cm or less, and further. It is preferably 1.5 cm or less, more preferably 1 cm or less, still more preferably 0.5 cm or less.

According to the ground return device according to the present invention, the distance between the lower surface of the upper case and the upper surface of the conduction ring or the spiral casing is 3 cm or less, so that the ground return device is made thinner and the space under the floor is created. In limited cases, the range of application of the ground return device is widened. For example, it can be installed in an environment where the height under the floor is low.

Further, in order to realize the above-mentioned object, the present invention is formed from an upper case provided with at least one suction port, a lower case provided with at least one discharge port, the upper case and the lower case. The suction port of the upper case has a first guide wall constituting the outer edge of the suction port, and includes a fan assembly provided in the storage cavity and the intake port is directed toward the upper case. The assembly has a second guide wall that constitutes the outer edge of the air intake, and when viewed along the vertical direction, the first guide wall is a ground return device provided outside the second guide wall. I will provide a.

According to the ground return device according to the present invention, the suction port of the upper case has a first guide wall constituting the outer edge of the suction port, and the fan assembly has a second guide wall forming the outer edge of the intake port. When viewed along the vertical direction, the first guide wall is provided on the outside of the second guide wall, so that effective suction can be ensured in the vicinity of the outer edge of the suction port. That is, when viewed along the vertical direction, when the first guide wall and the second guide wall overlap, the actual wind velocity of the airflow flowing just inside the outer edge of the suction port is very small due to the viscous action of the airflow. Therefore, the suction efficiency is very low, effective suction cannot be realized, and the actual effective suction port is smaller and smaller than the intake port of the fan assembly. On the other hand, by providing the first guide wall on the outside of the second guide wall, the influence of the airflow viscosity on the airflow slightly inside the outer edge of the suction port is avoided or suppressed, and in the vicinity of the outer edge of the suction port. Effective suction can be ensured and the air intake of the fan assembly can be fully utilized.

Further, in the ground return device according to the present invention, preferably, the outer edge of the suction port of the upper case is slightly larger than the suction port of the fan assembly.

According to the ground return device according to the present invention, the outer edge of the suction port of the upper case is slightly larger than the intake port of the fan assembly, that is, the viscous effect of the airflow is exerted on the outer edge of the suction port and the inside of the air flow ring of the fan assembly. Since it is limited to the side, the suction port portion of the upper case corresponding to the intake port of the fan assembly can realize a large suction air velocity, and at the same time, the difference in the suction air velocity of the suction port portion of the upper case is reduced, and the fan It is advantageous to ensure that the average wind velocity of the entire suction port reaches a preset level when the number of revolutions is lowered.

Further, in the ground return device according to the present invention, preferably, the first guide wall is inclined in the vertical direction and approaches the central axis of the fan assembly as it goes downward.

According to the ground return device according to the present invention, the first guide wall is inclined in the vertical direction and is closer to the central axis of the fan assembly as it goes downward. It can be smoothly guided to the intake port of the fan assembly.

Further, in the ground return air device according to the present invention, preferably, the second guide wall has an arc shape.

Since the second guide wall is arcuate by the ground return device according to the present invention, the air sucked from the suction port of the upper case is guided more smoothly to the intake port of the fan assembly, and the airflow direction is substantially downward. Can be adjusted.

Further, in order to realize the above-mentioned object, the present invention provides a pollutant control system including the ground return air return device according to any one of the above-mentioned items.

Further, the pollutant control system according to the present invention preferably further includes an air supply device provided at the top or top of the target space and supplying air to the target space.

Further, the pollutant control system according to the present invention preferably further includes an air treatment device for receiving and treating the air sucked by the ground return air return device.

Further, in the pollutant control system according to the present invention, preferably, an air treatment device for receiving and treating the air sucked by the ground return device and transmitting the treated air to the air supply device. Further included.

Further, in order to realize the above-mentioned object, the present invention provides a lower case of the ground return device and a panel-shaped upper case forming a storage cavity, and the storage cavity is provided with a fan. The assembly is provided so that the intake port faces the upper case, and the suction port of the upper case substantially corresponds to the intake port of the fan assembly.

According to the present invention, the suction port of the upper case substantially corresponds to the intake port of the fan assembly, that is, the suction port substantially corresponds to the intake port of the fan assembly instead of providing an excessive suction port in the upper case. When the height of the entire device is limited, it becomes easy to improve the suction efficiency of the ground return device and secure the strength of the upper case.

It is a side view which shows schematically the pollutant control system which concerns on embodiment of this invention. It is a perspective view schematically showing one form of the ground return air return device in the pollutant control system which concerns on embodiment of this invention, and shows the state seen from above. It is a side sectional view schematically showing the ground return air device in the pollutant control system which concerns on embodiment of this invention, and shows the sectional view along the central axis of the intake port of a fan assembly. It is a perspective view which schematically shows the ground return device of another embodiment in the pollutant control system which concerns on embodiment of this invention, and shows the state seen from above. It is a partial side sectional view schematically showing the ground return air device in the pollutant control system which concerns on embodiment of this invention, and shows the sectional view along the central axis of the intake port of a fan assembly. FIG. 3 is a side sectional view schematically showing a ground return air device in the pollutant control system according to the embodiment of FIG.

Hereinafter, the pollutant control system according to the embodiment of the present invention will be described with reference to FIGS. 1 to 6, and FIG. 1 shows an aspect schematically showing the pollutant control system according to the embodiment of the present invention. FIG. 2 is a perspective view schematically showing a ground return air device in the pollutant control system according to the embodiment of the present invention, and FIG. 3 is a view seen from above, and FIG. 3 is a view of the present invention. FIG. 4 is a side sectional view schematically showing a ground return air device in a pollutant control system according to an embodiment, and shows a cross section along a central axis of an intake port of a fan assembly. FIG. 4 is an embodiment of the present invention. FIG. 5 is a perspective view schematically showing a modified example of the ground return device in the pollutant control system according to the present invention, and shows a state seen from above. FIG. 5 shows the ground in the pollutant control system according to the embodiment of the present invention. It is a partial side sectional view schematically showing the return air return device and shows the sectional view along the central axis of the intake port of the fan assembly, and FIG. 6 shows the ground in the contaminant control system according to the embodiment of FIG. It is a side sectional view schematically showing a return air return device.

Here, for convenience of explanation, the description will be made with reference to the directions in FIGS. 1 to 3, and the vertical direction coincides with the actual vertical direction.

(1) Overall structure of the pollutant control system As shown in FIG. 1, the pollutant control system 1 includes a ground return air return device 10 and a ceiling air supply device 20, and the ground return air device 10 is a target space. The air in A (for example, an office, a conference room, etc.) is sucked from below, and the ceiling air supply device 20 supplies air from above toward the target space A.

Here, the ground return device 10 is provided, for example, on the fictitious floor at the bottom of the target space A, and the ceiling air supply device 20 is provided, for example, on the back side of the ceiling at the top of the target space A. Further, the ground return device 10 sucks the air in the target space A and discharges the sucked air to the outside of the target space A (for example, the space under the fictitious floor, a duct, or the like of the target space A). It may be discharged to the outside), or it may be purified by sucking the air in the target space A and supplying the sucked air to the air purification device (for example, air purification through a space under an imaginary floor or a duct). It may be supplied to the device), and then air is supplied to the ceiling air supply device 20 (for example, supply to the ceiling air supply device 20 via a space above the ceiling, a duct, or the like).

(2) Structure of the air return device As shown in FIGS. 4 and 6, the ground return device 10 is a thin air return device, and is at least one with the upper case 11A provided with at least one suction port JF. The upper case includes a lower case 11B provided with two discharge ports CF, a fan assembly FA provided in the storage cavity SN1 formed from the upper case 11A and the lower case 11B, and a fan assembly FA having an intake port directed to the upper case 11A. The suction port JF of 11A substantially corresponds to the suction port XF of the fan assembly FA.

Here, as shown in FIGS. 4 and 6, the suction port JF is formed on the top surface side of the upper case 11A, the discharge port CF is formed on the side surface of the lower case 11B, and the suction port CF is formed from the upper case 11A and the lower case 11B. A fan assembly FA having an axial direction in the vertical direction is provided in the stored storage cavity SN1, and the ratio of the total area of the suction port JF of the upper case 11A to the area of the intake port XF of the fan assembly FA is 1.3. It is less than or equal to 1.

In the embodiment of the ground return device shown in FIG. 4, two suction ports JF are provided, and each suction port JF has a first side side JF1 near the outer edge of the upper case 11A, respectively, and the first side side JF1. Is formed in an arc shape, and the center of the circle where the first side JF1 is located is coaxial with the center of the intake port XF of the fan assembly FA. The first side JF1 corresponds to the inside of the intake port XF of the fan assembly FA, corresponds to the edge of the intake port XF of the fan assembly FA, or is outside the edge of the intake port XF of the fan assembly FA and the fan. It can correspond to a position near the edge of the intake port XF of the assembly FA.

In the case shown in FIG. 4, the diameter of the circle on which the first side side JF1 is located may be formed in the same diameter as the diameter of the intake port XF of the fan assembly FA. However, a suction groove (outer suction groove) between the outer edge of the suction port JF and the first partition member DP1 in the radial direction of the fan assembly FA, and a suction groove (suction groove) between the first partition member DP1 adjacent in the radial direction. Regarding the suction groove (inner suction groove) between the inner edge of the suction port JF and the first partition member DP1 (intermediate suction groove), the length of the outer suction groove is long and the pressure loss (resistance) for suction is relatively large. On the other hand, if the length of the inner suction groove is short, the pressure loss (resistance) for suction becomes relatively large, so it is necessary to effectively use the outer suction groove. Based on this, preferably, the diameter of the circle where the first side JF1 is located is slightly larger than the diameter of the intake port XF of the fan assembly FA.

As shown in FIG. 4, the suction port JF of the upper case 11A further has a second side side JF2 separated from the outer edge of the upper case 11A, and the second side side JF2 is the inside of the intake port XF of the fan assembly FA. It is in. The second side side JF2 has an arc shape, and the circle on which the second side side JF2 is located and the circle on which the first side side is located overlap with each other.

As shown in FIG. 4, at least one first partition member DP1 is provided in the suction port JF of the upper case 11A, and the first partition member DP1 is provided along the extending direction of the first side side JF1. rice field. In the illustrated example, a plurality of first partition members DP1 are provided in each suction port JF of the upper case 11A, the first partition member DP1 has an arc shape, and the first partition member DP1 is located. The center of the circle and the center of the circle on which the first side JF1 is located overlap. The first partition member DP1 may be integrally molded with the upper case 11A.

Further, as shown in FIGS. 4 and 6, the lower case 11B is assembled below the upper case 11A, the lower case 11B is also substantially square when viewed along the vertical direction, and the diameter is, for example, for example. It is 600 mm or less, and is generally within the range of the upper case 11A. Further, the lower case 11B has a cylindrical side surface and a bottom surface provided at the lower end portion of the side surface. A flange to be fitted with the upper case 11A is formed on the upper part of the lower case 11B, and at the time of mounting, the flange of the lower case 11B is erected on the surface of the floor and the main body of the lower case 11B is embedded under the floor. Can be done. Further, an discharge port CF is formed on the side surface of the lower case 11B, and the air supply direction is substantially orthogonal to the vertical direction. Each was provided. The upper case 11A is flat, and after mounting, the upper case 11A is basically flush with the floor in the vicinity.

Further, as shown in FIG. 6, the fan assembly FA includes a fan 12, a motor 13, and a conduction ring 14, the rotation axis of the fan 12 extends in the vertical direction, and the motor 13 is a fan 12. The outer side of the guide ring 14 is fixed to the lower case 11B, and the inner side of the guide ring 14 is provided in the intake port XF of the fan 12 and viewed along the vertical direction. At this time, the center of the intake port of the conduction ring 14 coincides with the center of the upper case 11A. Further, in the illustrated example, the fan 12 uses a turbo fan that takes in air from above and blows out in the lateral direction, has an intake port parallel to the ground, and extends radially outward from the fan main body 121 and the fan main body 121. It has a plurality of blades 122, and the fan main body 121 has a tapered shape in which the diameter increases toward the bottom. Further, the motor 13 has a motor main body 131 and a rotating shaft 132 protruding upward from the motor main body. The motor main body 131 is provided on the lower side of the fan 12, and the lower side of the motor main body 131 is on the lower side. It is fixed to the bottom surface of the case 11B, and the rotating shaft 132 is fixed to the fan main body 121 via the hub 17, so that when the rotating shaft 132 rotates, the fan main body 121 is driven to rotate.
Optionally, the electrical component storage cavity is provided in the lower case 11B or is provided separately from the lower case 11B on the lower case 11B side (eg, fixed to the outer wall of the lower case 11B). , Provided separately from the lower case 11B, and connected to the lower case 11B only by a signal line and / or a power supply line).

A sensor (not shown) for detecting at least one of the carbon dioxide concentration in the air, the temperature of the air, and the humidity of the air was provided in the case 11 so as to be selectable. Further, as shown in FIG. 3, a small fan 16 for supplying air to the above-mentioned sensor is provided in the case 11. In the illustrated example, the small fan 16 is provided in the immediate vicinity of the intake port JF and is provided at approximately the same position as the guide ring 14 in the vertical direction, or is provided slightly inside the guide ring 14.

Further, as shown in FIG. 5, the suction port JF of the upper case 11A has a first guide wall CS1 constituting the outer edge of the suction port JF, and the fan assembly FA constitutes the outer edge of the intake port XF. When the guide wall CS2 is provided and viewed along the vertical direction, the first guide wall CS1 is provided on the outside (outer peripheral side) of the second guide wall CS2.

Here, the suction port JF of the upper case 11A is slightly larger than the suction port XF of the fan assembly FA. The first guide wall CS1 is composed of the first side side JF1 of the suction port JF (that is, is composed of the outermost suction port JF), and the first guide wall CS1 extends in the vertical direction. Further, the second guide wall CS2 is composed of a guiding portion in the vicinity of the inner edge of the guiding ring 14, and the guiding portion has an arc shape. Further, when viewed along the vertical direction, a part of the inner edge of the first partition member DP1 which is the outermost in the radial direction substantially corresponds to the outer edge of the intake port XF of the fan assembly FA (in the illustrated example, along the vertical direction). When viewed, the inner edge of the first partition member DP1 that is the outermost in the radial direction is substantially in direct contact with the outer edge of the intake port XF of the fan assembly FA).

Further, as shown in FIG. 5, the diversion portion of the diversion ring 14 extends into the intake port of the fan 12 and is surrounded by the inner edge of the diversion portion of the diversion ring 14 when viewed along the vertical direction. Assuming that the area of the region is A1, the area of the region surrounded by the outer edge of the intake port JF of the upper case 11A is A2, and the area of the region surrounded by the outer edge of the intake port of the fan 12 is A3, A1 <A2, Moreover, A1 <A3.

(3) Main Technical Effects of the Present Embodiment According to the contaminant control system 1 according to the present embodiment, the suction port JF of the upper case 11A is abbreviated to the intake port XF of the fan assembly FA in the ground return air device 10. Correspondingly, that is, the upper case 11A is not provided with an excessive suction port, but a suction port JF substantially corresponding to the intake port XF of the fan assembly FA is provided. Therefore, when the height of the entire device is limited, the ground is provided. It becomes easy to improve the suction efficiency of the return air device 10 and secure the strength of the upper case 11A.

Further, according to the contaminant control system 1 according to the present embodiment, in the ground return device 10, the fan assembly FA includes a turbo fan, and when viewed along the vertical direction, the suction port JF is the fan assembly FA. In order to avoid the central portion of the intake port XF, the strength of the upper case 11A can be further improved on the premise that it basically does not affect effective suction. That is, when the fan assembly FA includes a turbo fan, the suction wind speed at the center of the intake port XF of the fan assembly FA is very small, and a motor is provided below the center of the intake port XF to adjust the wind speed at the center position. Further, when the suction port JF is not provided in the portion corresponding to the central portion of the intake port XF of the fan assembly FA of the upper case 11A, the closed portion of the upper case 11A is basically assumed not to affect effective suction. The area of the upper case 11A can be further increased, and the strength of the upper case 11A can be further improved.

Further, according to the pollutant control system 1 according to the present embodiment, in the ground return device 10, at least one first partition member DP1 is provided in the suction port JF of the upper case 11A, and the first partition member is provided. Since the stretching direction of the DP1 is the same as the stretching direction of the first side JF1, it is possible to prevent foreign matter from falling into the suction port JF of the upper case 11A, and at the same time, it is possible to improve safety and at the same time, the first partition member. The DP1 serves as a reinforcing rib and can improve the strength of the upper case 11A at the suction port JF.

Further, according to the pollutant control system 1 according to the present embodiment, in the ground return device 10, a plurality of first partition members DP1 are provided, and are closest to the first side JF1 in the plurality of first partition members DP1. Since the inner edge of the partition member (predetermined partition member) corresponds to the outer edge of the intake port XF of the fan assembly FA, the influence of air viscosity is suppressed to improve the suction efficiency near the outer edge of the suction port JF of the upper case 11A. , Helps reduce the difference in suction air velocity at different positions inside the outer edge of the suction port JF of the upper case 11A. That is, when the fan assembly FA includes a turbo fan and the outer edge of the suction port JF of the upper case 11A is located outside the outer edge of the intake port XF of the fan assembly FA, as shown in FIG. 5 when the fan assembly FA is operated. In addition, there is a speed difference between the indoor air on both sides that makes the outer edge of the suction port JF of the upper case 11A the boundary surface JM in plan view, and due to the action of the viscosity of the air flow, the indoor air outside the low speed boundary surface JM. And the intake air flow S1 which is the indoor air inside the boundary surface having a slightly higher velocity rub against each other at the boundary surface JM, and the velocity of the intake air flow is lowered at least at a position approaching the boundary surface JM. On the other hand, in the first partition member DP1 (predetermined partition member) of the first side side JF1 closest to the suction port JF, the suction airflow S1 toward the outside of the first partition member DP1 (predetermined partition member) in plan view. Since the friction generated between the first partition member DP1 (predetermined partition member) and the suction airflow S2 toward the inside is smaller than the outer edge of the suction port JF of the upper case 11A, the first partition member DP1 (predetermined partition) The speed of the intake air flow inside the member) is less affected by the viscosity of the indoor air, and can directly enter the intake port XF of the fan assembly FA, and the suction action of the fan assembly FA is satisfactorily converted into the suction air velocity. The first partition member inside the first partition member DP1 (predetermined partition member), which can improve the intake efficiency and is closest to the first side JF1 of the suction port JF, has the first partition in a plan view. The difference in air velocity between the intake airflows S2 and S3 located on both the inner and outer sides of the member becomes smaller, which is inside the first partition member DP1 (predetermined partition member) closest to the first side JF1 of the suction port JF. While the average wind speed of the suction port JF portion of the upper case 11A can be improved, if the outer edge of the suction port JF of the upper case 11A and the outer edge of the intake port XF of the fan assembly FA correspond to each other, the suction port JF of the upper case 11A The speed of the intake air flow just inside the outer edge of the fan assembly FA is slowed down, and the intake port XF of the fan assembly FA cannot be fully utilized to form an effective intake.

Further, according to the contaminant control system 1 according to the present embodiment, when viewed along the vertical direction, the area of the region surrounded by the inner edge of the diversion portion of the diversion ring 14 is A1, and the area of the upper case 11A is set to A1. Assuming that the area of the area surrounded by the outer edge of the suction port JF is A2 and the area of the area surrounded by the outer edge of the intake port XF of the fan 12 is A3, A1 <A2 and A1 <A3, so that the whole is The air flow of the suction is throttled by the flow portion of the flow guide ring 14 and diffused at the intake port of the fan 12, so that the air flow at the intake port of the fan 12 becomes more uniform.

Optionally, the electrical component storage cavity is either provided in the lower case 11B or provided separately from the lower case 11B on the lower case 11B side (eg, fixed to the outer wall of the lower case 11B). , It is provided separately from the lower case 11B and is connected to the lower case 11B only by the signal line and / or the power line) to prevent water from coming into contact with the electric parts in the electric parts storage cavity. Not only can the electrical safety be enhanced, but the ground return device 10 can be downsized in the vertical direction.

Further, according to the pollutant control system 1 according to the present embodiment, in the ground return device 10, the suction port JF of the upper case 11A has a first guide wall CS1 constituting the outer edge of the suction port JF, and is a fan. The assembly FA has a second guide wall CS2 constituting the outer edge of the intake port XF, and when viewed along the vertical direction, the first guide wall CS1 is provided on the outside of the second guide wall CS2, so that the suction port is provided. Effective inhalation can be ensured near the outer edge of the JF. That is, when viewed along the vertical direction, when the first guide wall CS1 and the second guide wall CS2 overlap, the actual wind velocity of the airflow flowing immediately inside the outer edge of the suction port JF is due to the viscous action of the airflow. It becomes very small, the suction efficiency is very low, effective suction cannot be realized, and the actual effective suction port (suction area) becomes small and smaller than the intake port XF of the fan assembly FA. On the other hand, by providing the first guide wall CS1 on the outside of the second guide wall CS2, the influence of the airflow viscosity on the airflow flowing immediately inside the outer edge of the suction port JF can be avoided or suppressed, and the outer edge of the suction port JF can be avoided or suppressed. Effective inhalation can be ensured in the vicinity of.

Further, according to the pollutant control system 1 according to the present embodiment, in the ground return device 10, the ratio of the total area of the suction port JF of the upper case 11A to the area of the intake port XF of the fan assembly FA is 1. Since it is 3: 1 or less, it helps to secure the maximum inhalation effect and the optimum strength of the upper case.

When the fan assembly includes a turbofan, the airflow formed by the fan assembly FA is small in the center of the upper case 11A, so that the suction efficiency is clearly affected even if the suction port JF is not provided in the center of the upper case 11A. In addition to not being affected, it is possible to avoid a decrease in the strength of the upper case 11A by providing the suction port JF in the center of the upper case 11A.

Although the present invention has been exemplified above with reference to the drawings, it is clear that the specific implementation of the present invention is not limited to the above-described embodiment.

For example, in the ground return device shown in FIGS. 2 and 3, the upper case 11A has a panel shape in which the vertical size is smaller than the horizontal size, and the top surface side of the upper case 11A is a tuyere portion. A suction port JF is formed in the tuyere portion 111 including the 111 and the protruding portion 112, the protruding portion 112 protrudes upward from the tuyere portion 111, and the electric component storage cavity SN2 is provided inside the protruding portion 112. An electric component 15 for controlling the fan assembly FA, such as a circuit board electrically connected to the motor 13, is housed in the electric component storage cavity SN2. The storage cavity SN1 surrounded by the side surface and the bottom surface of the lower case 11B is below the electric component storage cavity SN2 inside the protrusion 112 of the upper case 11B. Since the protrusion 112 is provided on the upper case 11A and the electrical component storage cavity SN2 is formed inside the protrusion 112, even if water suddenly spills into the suction port and is sucked into the storage cavity SN1 by the fan assembly FA. It becomes easy to prevent water from coming into contact with the electric parts in the electric parts storage cavity SN1, and the electric safety can be enhanced.

Specifically, as shown in FIGS. 2 and 3, the upper case 11A has a substantially square shape when viewed along the vertical direction, has a side length of, for example, 600 mm ± 5 mm, and has a tuyere portion 111. It has a protrusion 112. The protrusion 112 was formed over the entire front-rear direction of the case 11. Further, on both sides of the protruding portion 112 in the left-right direction, tuyere portions 111 formed symmetrically with the protruding portion 112 interposed therebetween are formed, and each of the tuyere portions 111 has one suction port JF. The suction ports JF of the two tuyere portions 111 are provided symmetrically with respect to the central axis CC (corresponding to the rotation axis of the fan assembly FA) of the circular intake port XF of the fan assembly FA. Further, when viewed along the vertical direction, the suction port JF of the tuyere portion 111 is formed closer to the center side of the case 11, that is, the suction port JF is provided closer to the protruding portion 112.

A part (preferably most) of the first side JF1 corresponds to the inside of the intake port XF of the fan assembly FA, and a part corresponds to the edge of the intake port XF of the fan assembly FA, and a further part. Corresponds to a position outside the edge of the intake port XF of the fan assembly FA and near the edge of the intake port XF of the fan assembly FA, and the first side JF1 is linear and parallel to the protrusion 112 in the front-rear direction. Extends along. Further, the suction port JF of the upper case 11A further has a second side side JF2 separated from the outer edge of the upper case 11A, and the second side side JF2 is inside the intake port XF of the fan assembly FA. The two side sides JF2 are linear and extend in the front-rear direction in parallel with the protrusion 112.

One of the outermost first partition members DP1 of the suction port JF of the upper case 11A corresponds to the outer edge of the intake port XF of the fan assembly FA (at least most of them correspond to the outer edge of the intake port XF of the fan assembly FA). This weakens the effect of airflow viscosity. Further, in the illustrated example, the first partition member DP1 has a long plate shape, and the first partition member DP1 is integrally formed with the upper case 11A.

Further, according to the pollutant control system 1 according to the present embodiment, in the ground return device 10, the tuyere portions 111 on which the suction port JF is formed are provided on both sides of the upper case 11A, so that the upper case 11A is provided with the tuyere portions 111. At the same time as ensuring the strength, it becomes easier to improve the suction efficiency of the air return device.

Further, in the above-described embodiment, the upper case 11A is substantially rectangular when viewed along the vertical direction, and the lower case 11B is also substantially rectangular when viewed along the vertical direction, and as a whole. Within the range of the upper case 11A, but not limited to that, the shapes of the upper case 11A and the lower case 11B can be appropriately selected as needed, for example, the lower case is circular when viewed along the vertical direction. It may be formed.

Further, in the above-described embodiment, the protrusion 112 is provided at the center of the top of the case 11 of the ground return device 10, but is not limited to this, and is located at a position deviated from the center of the top of the case 11 of the ground return device 10. It may be provided.

Further, in the above-described embodiment, the top or top of the case 11 has a flange for being erected on the surface of the floor, but the flange is omitted when the top of the case 11 is formed in a flat surface. This may allow the entire ground return device 10 to be buried in the floor. At this time, the suction port JF may be flush with the ground or slightly lower than the ground.

Further, in the above-described embodiment, the upper case 11A is provided with two suction ports JF, but the present invention is not limited thereto.

Further, in the above-described embodiment, the plurality of suction ports JF of the upper case 11A are provided symmetrically with respect to the central axis CC of the intake port XF of the fan assembly FA, but the present invention is not limited to this, and the plurality of suction ports of the upper case 11A are not limited to the plurality of suction ports JF. The port JF may be provided uniformly with respect to the central axis CC of the intake port XF of the fan assembly FA, or may be provided symmetrically and uniformly with respect to the central axis CC of the intake port XF of the fan assembly FA. Further, it may be provided asymmetrically with respect to the central axis CC of the intake port XF of the fan assembly FA.

Further, in the above-described embodiment, the suction port JF has a first side side JF1 close to the outer edge of the upper case 11A, and the first side side JF1 is linear, but is not limited to the first side side. The JF1 may have various shapes such as a straight line, a polygonal line, and an arc. For example, the first side JF1 is formed so that both ends are bent with respect to the intermediate portion.

Further, in the above-described embodiment, the suction port JF has a first side side JF1 near the outer edge of the upper case 11A, and a part of the first side side JF1 corresponds to the inside of the intake port XF of the fan assembly FA. However, a part corresponds to the edge of the intake port XF of the fan assembly FA, and a part is located outside the edge of the intake port XF of the fan assembly FA and near the edge of the intake port XF of the fan assembly FA. Or, all of the first side JF1 corresponds to the inside of the intake port XF of the fan assembly FA, corresponds to the edge of the intake port XF of the fan assembly FA, or corresponds to the fan assembly FA. It corresponds to a position outside the edge of the intake port XF and near the edge of the intake port XF of the fan assembly FA, but not limited to these, at least a part of the first side JF1 is the intake port of the fan assembly FA. It may correspond to the inside of the fan assembly FA, the edge of the intake port of the fan assembly FA, or the position outside the intake port edge of the fan assembly FA and close to the edge of the intake port of the fan assembly FA.

Further, in the above-described embodiment, the suction port JF of the upper case 11A has a second side side JF2 separated from the outside of the upper case 11A, and the second side side JF2 is linear, but is not limited thereto. The second side side JF2 may have various shapes such as a straight line, a polygonal line, and an arc. For example, the second side JF2 is formed so that both ends are bent with respect to the intermediate portion.

Further, in the above-described embodiment, the first partition member DP1 is formed so as to have the same thickness as the other portion of the upper case 11A and is integrally formed, but is not limited to the first partition member. The DP1 may be formed so as to project downward from the upper case 11A. For example, the DP1 is inclined and extended so as to approach the central axis CC of the fan assembly FA toward the lower side, and serves as a guide for the air flow. Fulfill.

Further, in the above-described embodiment, the first partition member DP1 is integrally formed with the upper case 11A, but the first partition member DP1 is provided so as to be swingable around the horizontal axis with respect to the suction port JF. Alternatively, the first partition member DP1 may be further omitted depending on the situation.

Further, in the above-described embodiment, when viewed along the vertical direction, a part of the inner edge of the first partition member DP1 which is the outermost in the radial direction substantially corresponds to the outer edge of the intake port XF of the fan assembly FA, but is limited thereto. Instead, a part of the inner edge of the first partition member DP1 which is the second closest to the outer side in the radial direction may substantially correspond to the outer edge of the intake port XF of the fan assembly FA.

Further, in the above-described embodiment, as shown in FIG. 4, at least one second partition member DP2 may be provided in the suction port JF of the upper case 11A, and the second partition member DP2 is the intake port of the fan assembly FA. It is provided along the radial direction of the XF.

In the above case, as shown in FIG. 4, the second partition member DP2 may be uniformly distributed in the circumferential direction about the rotation axis of the fan assembly FA, or the length of the second partition member DP2. The length may be smaller than the radial length of the suction port JF of the upper case 11A, and a plurality of second partition members DP2 may be formed so as to be provided alternately in the radial direction about the rotation axis of the fan assembly FA. .. Further, the second partition member DP2 may be formed in the shape of a long plate or may be formed in another shape.

Further, in the above-described embodiment, the lower case 11B may be rotatably formed around the rotation axis of the fan assembly FA with respect to the upper case 11A in order to easily adjust the direction of the discharge port CF.

Further, in the above-described embodiment, the fan 12 uses a turbofan that takes in air from above and blows out in the side direction, but is not limited to this. A sirocco fan arranged in a form of ejection may be used, or an axial flow fan that takes in air from above and blows out to the bottom may be used. When a sirocco fan is used, the center of the intake port XF of the fan assembly FA may deviate from the center of the upper case 11A.

Further, in the above-described embodiment, the discharge port CF is formed on the side surface of the case 11, but the discharge port CF may be formed on the bottom surface of the case 11 or the side surface of the case 11. And may be formed on the bottom surface at the same time.

For example, the air supply direction of the discharge port CF is substantially parallel in the vertical direction, and the airflow turns after hitting the ground and further flows along the ground, or the airflow is downward from the ground return device. After being blown toward, it further flows along the duct communicating with the discharge port CF.

Further, in the above-described embodiment, the lower case 11B may be provided with the discharge port CF in one direction, two directions, or three directions, or the discharge port CF may be provided in any of the four directions. May be good.

Further, in the above-described embodiment, the suction port JF and / or the discharge port CF is provided with a filtration member for filtering the air entering the ground return device for subsequent discharge or subsequent indoor circulation. Further may be provided.

Further, in the case 11, a sensor (not shown) for detecting at least one of the carbon dioxide concentration in the air, the temperature of the air, and the humidity of the air is provided. Further, in the case 11, a small fan 16 for supplying air to the above-mentioned sensor is provided.

Further, in the above-described embodiment, the case 11 is provided with a wind speed sensor such as a small fan 16 for measuring the wind speed, but the present invention is not limited to this, and the small fan 16 may be omitted depending on the situation. good.

Further, in the above-described embodiment, the first guide wall CS1 is inclined in the vertical direction and is closer to the central axis CC of the fan assembly FA as it goes downward, and the second guide wall CS2 goes downward. It approaches the central axis CC of the fan assembly FA, but the first guide wall CS1 may be formed in another shape such as an arc shape, and the second guide wall CS2 may be formed in another shape such as a straight line. It may be formed.

Further, in the above-described embodiment, the fan assembly FA can include a plurality of sirocco fans distributed and provided in a horizontal plane.

In the above case, a plurality of suction ports JF can be provided corresponding to each of the plurality of sirocco fans, and an electric component storage cavity SN2 can be provided between the plurality of sirocco fans.

It should be understood that the present invention can freely combine each embodiment and appropriately modify or omit each embodiment within the scope of the present invention.

1 Pollutant control system;
10 Ground return device;
11 cases;
11A upper case;
11B lower case;
111 tuyere;
112 protrusion;
12 fans;
121 Fan body;
122 feathers;
13 motors;
131 Motor body;
132 axis of rotation;
14 Conduction ring;
15 Electrical components;
16 small fan;
17 hub;
JF suction port;
JF1 first side;
JF2 second side;
CF outlet;
XF air intake;
SN1 storage cavity;
SN2 electrical component storage cavity;
DP1 first partition member;
DP2 second partition member;
CS1 first guide wall;
CS2 second guide wall;
FA fan assembly;
CC central axis;
20 Ceiling air supply device;
A Target space;
S1 airflow;
S2 airflow;
S3 airflow;
JM boundary surface.

Claims

An upper case with at least one suction port and
A lower case with at least one outlet,
Includes a fan assembly provided in the storage cavity formed from the upper case and the lower case and with an air intake directed towards the upper case.
The suction port of the upper case substantially corresponds to the suction port of the fan assembly.
Ground return device.
The fan assembly includes a turbofan.
When viewed along the vertical direction, the intake port avoids the central portion of the intake port of the fan assembly.
The ground return air device according to claim 1.
The suction port of the upper case has a first side side close to the outer edge of the upper case.
At least a portion of the first side is inside the intake port of the fan assembly, the edge of the intake port of the fan assembly, or outside the edge of the intake port of the fan assembly and the edge of the intake port of the fan assembly. Corresponds to the position close to the part,
The ground return air device according to claim 1.
At least one first partition member is provided in the suction port of the upper case.
The stretching direction of the first partition member is the same as the stretching direction of the first side side.
The ground return air return device according to claim 3.
One of the first partition members is provided, and the inner edge of the first partition member corresponds to the outer edge of the intake port of the fan assembly.
or,
A plurality of the first partition members are provided, the plurality of the first partition members include a predetermined partition member, and the predetermined partition member is the closest to the first side side of the plurality of the first partition members. It is a partition member, or is a partition member second closest to the first side side of the plurality of first partition members, and the inner edge of the predetermined partition member corresponds to the outer edge of the intake port of the fan assembly. ,
The ground return air return device according to claim 4.
The suction port of the upper case further has a second side away from the outer edge of the upper case.
The second side corresponds to the inside of the air intake of the fan assembly.
The ground return air return device according to claim 3.
Both the first side side and the second side side are arcuate and have an arc shape.
The circle on which the second side side is located and the circle on which the first side side is located overlap with each other.
The ground return air return device according to claim 6.
The first side is arcuate and has an arc shape.
The air intake of the fan assembly is circular and
The center of the circle where the first side is located and the center of the intake port of the fan assembly are coaxial.
The ground return air return device according to claim 3.
The diameter of the circle on which the first side is located is the same as the diameter of the air intake of the fan assembly.
or,
The diameter of the circle on which the first side is located is slightly larger than the diameter of the air intake of the fan assembly.
The ground return air return device according to claim 8.
At least one second partition member is provided at the suction port of the upper case.
The second partition member is provided along the radial direction of the intake port of the fan assembly.
The ground return air return device according to claim 4.
The second partition member is uniformly distributed and
or,
The length of the second partition member is smaller than the radial length of the suction port of the upper case, and the plurality of second partition members are provided alternately in the radial direction.
The ground return air device according to claim 10.
The upper case is provided with a plurality of suction ports, and the upper case is provided with a plurality of suction ports.
The suction ports of the different upper cases are in close proximity to each other.
The ground return air device according to claim 1.
The plurality of suction ports of the upper case are provided symmetrically and / or uniformly with respect to the central axis of the intake ports of the fan assembly.
The ground return air device according to claim 12.
The fan assembly includes a turbofan and a conduction ring.
In the vicinity of the inner edge of the diversion ring, a diversion portion facing the intake port of the turbofan is provided.
The ground return device according to claim 1 or 5.
The diversion portion extends into the intake port of the turbofan and extends to the intake port of the turbofan.
When viewed along the vertical direction, the area of the region surrounded by the inner edge of the flow guide portion is A1, the area of the region surrounded by the outer edge of the suction port of the upper case is A2, and the intake port of the turbo fan is defined as A2. Assuming that the area of the region surrounded by the outer edge of is A3, A1 <A2 and A1 <A3.
The ground return device according to claim 14.
The diversion portion is arcuate.
The ground return device according to claim 14.
Including additional electrical component storage cavities,
The electrical components that control the fan assembly are stored in the electrical component storage cavity.
The electrical component storage cavity is provided in the lower case, or is provided separately from the lower case on the lower case side, or the upper case includes a protrusion, and the electrical component storage cavity is provided. Formed inside the protrusion,
The ground return air device according to claim 1.
The fan assembly comprises a plurality of sirocco fans distributed and provided in a horizontal plane.
The ground return device according to claim 17.
The upper case is provided with a plurality of suction ports corresponding to the plurality of sirocco fans, and the discharge port of the upper case substantially corresponds to the intake port of the sirocco fan.
The ground return device according to claim 18.
The electrical component storage cavity is provided between the plurality of sirocco fans.
The ground return device according to claim 18.
The fan assembly includes a turbofan.
When viewed along the vertical direction, the center of the air intake of the fan assembly coincides with the center of the upper case.
The ground return air device according to claim 1.
The fan assembly includes a sirocco fan
When viewed along the vertical direction, the center of the air intake port deviates from the center of the upper case.
The ground return air device according to claim 1.
The ratio of the total area of the intake port of the upper case to the area of the intake port of the fan assembly is 1.3: 1 or less.
The ground return air device according to claim 1.
An upper case with at least one suction port and
A lower case with at least one outlet,
Includes a fan assembly provided in the storage cavity formed from the upper case and the lower case and with an air intake directed towards the upper case.
The suction port of the upper case has a first guide wall constituting the outer edge of the suction port, and the fan assembly has a second guide wall constituting the outer edge of the intake port, along the vertical direction. When viewed, the first guide wall is provided on the outside of the second guide wall.
Ground return device.
The ground return device according to any one of claims 1 to 24 is included.
Pollutant control system.
It is provided at the top or top of the target space and further includes an air supply device that sends air to the target space.
25. The pollutant control system according to claim 25.
Further including an air treatment device for receiving and processing the air sucked by the ground return device.
25. The pollutant control system according to claim 25.
Further including an air treatment device for receiving and processing the air sucked by the ground return device and transmitting the processed air to the air supply device.
26. The pollutant control system according to claim 26.