Description:FIELD:
The present disclosure relates to ventilation systems, more particularly relates to an air facilitation plug for guided ventilation systems.

BACKGROUND:
Ventilation and ventilation systems are well known sub-systems of air-conditioning systems that can reduce the concentration of pollutants in living areas in air-conditioned spaces and maintain comfort even at high refrigerated supply air temperatures.

In such ventilation systems, air with a temperature slightly lower than the room temperature is supplied to the living area formed in the lower part of the air-conditioned space at a slow speed, and the air is heated by heating elements (such as people) present in the living area. Updrafts are generated, thereby transporting pollutants such as dust or gas generated in the air-conditioned space to the upper part of the air-conditioned space.

Furthermore, in such ventilation systems, the pollutants are exhausted together with the heated air from an exhaust port provided on the ceiling or the like, thereby ventilating the air-conditioned space.

In such ventilation systems, although an area with high temperature and high concentration of pollutants is formed above the air-conditioned space, the low-temperature air supplied to the air-conditioned space is sequentially pushed out, and the air with high temperature and high concentration of pollutants is discharged without being stirred, so it has the advantage of ensuring that the living area below the air-conditioned space is a clean environment, and even if the supply air temperature is lowered, the temperature of the living area can be maintained in a comfortable range.

As a result, ventilation systems are expected to be energy-saving and air-conditioning systems with high ventilation efficiency.

In such ventilation systems, in order to ensure comfort by suppressing the temperature difference between the feet and the head to, for example, 3°C or less (international standard, American Society of Heating, Refrigerating and Air-Conditioning Engineers standard comfort reference value), it is necessary to perform large air volume operation that reduces the temperature difference between the supply and exhaust gases.

Therefore, a plurality of large air supply units needs to be arranged in the air-conditioned space, and there is a problem that it is difficult to secure an installation place for the air supply units. Furthermore, when pollutants are generated from a location associated with heat generation or in the vicinity thereof, the pollutants are discharged from the living area to the ceiling due to the thermal updraft. Therefore, the concentration of pollutants in the living space can be kept low. However, in the absence of heat generation, the transport and dilution of pollutants occurs, resulting in the risk of occupants being exposed to high concentrations of polluted air.

Therefore, in order to secure the installation space by compacting the air supply units, reduce the temperature gradient in the living area, and improve the effect of diluting the pollutants in the living area, a ventilation system through plurality of guide vanes has been disclosed in the prior art (JP4006196B2 and JP4421347B2) that imparts a rotational component to the blown air to increase the amount of induction near the air supply unit, thereby improving the diffusivity of the air supply.

JP4006196B2 provides a displacement ventilation system, low temperature air SA is supplied into an air-conditioned space 10, air heated in the space 10 ascends, and is discharged to conduct ventilation. Swirling components are given to the low temperature air SA, and the air is let out into the space 10. By giving swirling components to the air SA let out in the space 10, volume of air induced by the air SA can be increased.

By spreading the air through the ventilation system, the discomfort of the airflow can be reduced without increasing the equipment cost, and it can also reduce the upper and lower temperature difference in the living area.

JP4421347B2 provides an exchange ventilation system where the low-temperature air is supplied into an air-conditioning space, and the heated air raised by being heated in the air-conditioning space is exhausted to perform the ventilation, a plurality of guide vanes are mounted on an air supply hole for the low temperature air to give the swirling component to the low temperature air blown out into the air-conditioning space, the plurality of guide vanes are radially mounted around a central axis of the air supply hole, and respectively inclined to a plane orthogonal to the central axis of the air supply hole at the same angle, and a cylindrical inner wall face applying the central axis of the air supply hole as its central axis, is formed around the plurality of guide vanes.

However, in such ventilation systems, the central location of the plurality of guide vanes is either a plane surface or having a depression, where a portion of the incoming blown air gets blocked, or gets rebound instead of reaching the guide vanes. Yet again, the rebound air from the central location may disturb the flow of the incoming blown air, and causes unwanted vibration and noise in the air flow.

The present disclosure aims at further improving such ventilation systems. An object of the present disclosure is to provide a ventilation system that can mitigate the blocking of the air at the central location of the plurality of guide vanes and facilitates the incoming blown air reach the guide vanes for improved ventilation of the room where it is installed.

SUMMARY:
The present disclosure provides an air supply unit 106 for a ventilation system 100, for imparting a swirling component to the supplied air SA supplied into an air-conditioning space 102. The air supply unit 106 includes plurality of air supply ports 200, wherein each air supply port 200 is equipped with plurality of guide vanes 201 to impart a rotational component to the supplied air SA blown into the air-conditioning space 102, wherein the plurality of guide vanes 201 are arranged radially around the central axis of each air supply port 200, and the plurality of guide vanes 201 are inclined at the same angle relative to a plane orthogonal to the central axis of the air supply port 200. The plurality of guide vanes 201 are attached to the inner wall of the air supply port 200.

The central location 202 of the plurality of guide vanes 201 includes an air facilitation plug 203, which helps in smoothly transmitting the incoming supplied air SA onto the plurality of guide vanes 201.

The air supply port 200 is preferably in a hollow cylindrical shape. In an aspect, the length L of the air supply port 200 along the direction of its central axis is equal to or less than the maximum width W of the guide vanes 201. The maximum width W of the guide vanes 201 is when it is measured at its far end from the axis of the air supply port 200, and the minimum width of the guide vanes is when it is measured at its near end of the axis of the air supply port 200.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Fig. 1 is a schematic diagram for explaining the ventilation system of the present disclosure.

Fig. 2 illustrates a front view of the air supply unit.

Fig. 2A (Prior art) depicts the rear view of an air supply port of the prior art.

Fig. 2B depicts the rear view of an air supply port of the present disclosure with an air facilitation plug.

Fig. 3A illustrates a front perspective view of a panel consisting of two air supply ports.

Fig. 3B illustrates a rear perspective view of a panel consisting of two air supply ports.

Fig. 4 is a cross sectional view of the internal structure of each air supply port, which is an enlarged view of the Z-Z direction cross-section in Fig. 2B.

Fig. 5 is an explanatory view of an embodiment of the present disclosure in which a porous plate having a plurality of ventilation holes is arranged before the front surface of the air supply unit in parallel with the front surface.

Fig. 6 is a plan view of the air-conditioning space.

LIST OF REFERENCE NUMERALS USED IN SPECIFICATION AND DRAWINGS
100 - Ventilation system
102 - Air-conditioning space
104 - Living area
106 - Air supply unit
108 - Front surface of the air supply unit
110 - Air-conditioner
111 - Air supply duct
112 - Exhaust duct
124 - Porous plate
200 - Air supply port
201 - Guide vanes
202 – Central location of the plurality of the guide vanes
203 – Air facilitation plug
300 – Air supply panel of air supply ports
301 - Front perspective view of air supply panel of air supply ports
302 - Rear perspective view of air supply panel of air supply ports
EA - Exhaust air
G - Predetermined gap between the Front surface of the air supply unit, and the porous plate.
H1 to H8 – Various heat generating elements in the room
L – Length of the air supply port
OA - Outside air
SA - Supplied air
W – Maximum width of each guide vane

DETAILED DESCRIPTION:
The subject matter of the present disclosure is described in detail with reference to the accompanying drawings. Unless otherwise specified, all the technical and scientific terms used herein have the same meaning as is generally understood by a person skilled in the art pertaining to the present disclosure. Headings are used solely for organizational purposes, and are not intended to limit the disclosure in any way.

The use of the singular includes the plural unless specifically stated otherwise. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well. The use of “or” means “and/or” unless stated otherwise. Unless otherwise indicated, all numbers used herein to express quantities, dimensions, and so forth used should be understood as being modified in all instances by the term "about." It is to be understood that wherein a numerical range is recited, it includes all values within that range, and all narrower ranges within that range, whether specifically recited or not. As used herein, "including," "containing" and like terms are understood to be synonymous with "comprising" and are therefore open-ended and do not exclude the presence of additional undescribed or unrecited elements, materials, phases or method steps.

In addition, it should be appreciated that any figures are provided herewith, they are for explanation purposes to persons ordinarily skilled in the art and that the drawings of them are not necessarily drawn to scale.

Any method/process steps and/or operations and/or instructions used in this disclosure, are for illustrative purposes in a particular order and/or grouping. Other orders and/or grouping of the process steps or its portions and/or operations or its portions and/or instructions or its portions are possible and, one or more of the process steps and/or operations and/or instructions can be combined and/or deleted.

According to the present disclosure, an air supply unit for a ventilation system that imparts a swirling component to the supplied air blown into an air-conditioning space and exhausts the heated air that is heated and rises in the air-conditioning space to perform ventilation. The air supply port is equipped with a plurality of guide vanes, which impart a rotational component to the supplied air blown into the air-conditioning space. These plurality of guide vanes are arranged radially around the central axis of the air supply port, and these plurality of guide vanes are arranged at the same angle with respect to a plane orthogonal to the central axis of the air supply port, and an air supply port is formed around the central axis of the air supply port as its central axis.

The feature is that in the rear side of the air supply ports from which side the supplied air is blown, the central location of the plurality of guide vanes includes an air facilitation plug, which helps in smoothly transmitting the incoming supplied air onto the plurality of guide vanes.

In an aspect, the length of the air supply port along the direction of the central axis of the air supply port is equal to or less than the maximum width of the guide vanes along the direction of the central axis of the air supply port.

The air supply port may optionally be made of sound-absorbing material.

Furthermore, the air supply unit includes a plurality of air supply ports that are arranged in an array, and the plurality of guide vanes for imparting rotational components to the supplied air are mounted on each air supply port.

The inclination directions of the guide vanes are opposite to each other on adjacent air supply ports. Furthermore, a porous plate may be provided in front of the air supply port.

Hereinafter, preferred embodiments of the present disclosure will be described with reference to the drawings.

Fig. 1 is a schematic structural diagram for explaining the ventilation system 100 according to the embodiment of the present disclosure.

The air-conditioning space 102 for example, may be an office, a computer room, a reception room, a banquet hall, an amusement park, a printing room, a ward, a toilet, a kitchen, a machine room, a boiler room, a factory, etc., and includes a ceiling, a floor, and a side wall.

In the example shown in Fig. 1, in the living area 104 formed inside the air-conditioning space 102, for example, a couple of people exist as heat generating bodies.

An air supply unit 106 is provided at the lower part of one side in the air-conditioning space 102, wherein the air supply unit 106 includes plurality of air supply ports 200 (as shown in Fig. 2). Similarly, an exhaust duct 112 is provided in the upper part of one side in the air-conditioning space 102.

As shown in Fig. 1, an exhaust duct 112 including an exhaust fan is connected to the exhaust duct 112 arranged in the upper part of the air-conditioning space 102.

Therefore, the air accumulated in the upper part of the air-conditioning space 102 (air heated due to the thermal load of heat generating elements such as people, office machines, etc. existing in the air-conditioning space 102) is discharged to the outside via the exhaust duct 112.

When the supplied air SA blows out from each air supply port 200 into the air-conditioning space 102 while rotating, an induction effect is exerted on the supplied air SA blown out from each air supply port 200 to induce the air in the air-conditioning space 102 to move together.

In the ventilation system 100 shown in Fig. 1, since a rotational component is given to the supplied air SA blown out from the air supply port 200, the induction amount of the air in the air-conditioning space 102 induced by the supplied air SA (induction ratio) increases.

Furthermore, the supplied air SA blown into the air-conditioning space 102 flows downward in the air-conditioning space 102 due to the temperature difference, and fills the living area 104 below the air-conditioning space 102 at a low speed, thereby maintaining the living area 104 in a comfortable environment.

On the other hand, in the living area 104 in the air-conditioning space 102, for example, there are people as heat generating bodies, so the supplied air SA blown to the living area 104 and in thermal contact with the people or other heat generating devices, wherein the air is heated and rise slowly.

Through the upward airflow, pollutants such as dust or gas generated around the people in the living area 104 in the air-conditioning space 102 can be transported to the upper part of the air-conditioning space 102.

Moreover, the air (heated air) staying in the upper part of the air-conditioning space 102 will not be stirred, that is, the temperature layer formed in the lower living area 104 in the air-conditioning space 102 will not be disturbed. The heated air discharges out through the exhaust duct 112.

In this way, supplied air SA is blown to the living area 104 in the lower part of the air-conditioning space 102, and pollutants such as dust or gas are discharged from the upper part of the air-conditioning space 102 together with the heated air, thereby performing ventilation in the air-conditioning space 102, and the lower living area 104 of the air-conditioning space 102 is kept in an environment of clean supplied air SA.

As mentioned above, an example of the preferred embodiment of the present disclosure has been described. However, the present disclosure is not limited to the illustrated form.

As shown, in Fig. 1 the supplied air SA is the outside air OA provided to the air-conditioner 110, which is then supplied from the air conditioner to the air supply unit 106 via an air supply duct 111.

Therefore, supplied air SA is blown to the living area 104 inside the air-conditioning space 102 from the plurality of air supply ports 200 (as shown in Fig. 2) formed on the front surface 108 of the air supply unit 106.

The air-conditioner 110 is provided with a cooler and a filter (not shown in figure) for cooling the outside air OA and producing low-temperature air, and is equipped to supply the produced low-temperature air to the air supply unit 106 via the air supply duct 111.

While, here low temperature air is input to the air supply unit 106, which supplies low temperature air to the living area 104 keeping a hot and humid atmosphere in mind, however the benefits of the present disclosure can be availed even where low temperature air is not required. For example, the air supply unit 106 may be input with normal air or high temperature air, which would obviously supply normal air or high temperature air to the living area 104.

Now, the detailed structure of the air supply unit 106 will be described below.

Fig. 2 illustrates a front view of the air supply unit 106.

The front face of the air supply unit 106 is exposed at the lower part of one side of the air-conditioning space 102.

In this way, as shown in Fig. 2, a plurality of air supply ports 200 are arranged vertically and horizontally on the front surface 108 of the air supply unit 106 exposed from the lower part of one side surface of the air-conditioned space 102.

While there is no specific limit on the number of air supply ports 200 on the front surface 108 of the air supply unit 106, a person skilled in the art can suitably arrange optimum number of air supply ports 200 to form the air supply unit 106 based on the required ventilation in a certain air conditioning space, which in turn may depend on the dimension, size, type of the air conditioning space, the geographical location, the weather condition in the area, etc.

Fig. 2A (Prior art) depicts the rear view of an air supply port 200 of the prior art, wherein the central location 202 of the plurality of guide vanes 201, which is a depressed surface. In some prior arts, as known to the inventors, the central location 200 of the plurality of guide vanes 201 may have a plane surface.

Fig. 2B depicts the rear view of an air supply port 200 of the present disclosure, where, the central location 202 of the plurality of guide vanes 201, includes an air facilitation plug 203, which helps in smoothly transmitting the supplied air SA onto the plurality of guide vanes 201.

In other words, at the rear side of each air supply port 200, wherein the rear side is the side that faces towards the supplied air SA, the central location 202 of the plurality of guide vanes 201 includes an air facilitation plug 203.

Each air supply port 200 is preferably in a hollow cylindrical shape. In an aspect, the length L of the air supply port 200 along the direction of its central axis is equal to or less than the maximum width W of the guide vanes 201. The maximum width W of the guide vanes 201 is when it is measured at its far end from the axis of the air supply port 200, and the minimum width of the guide vanes is when it is measured at its near end of the axis of the air supply port 200.

The inclination directions of the guide vanes 201 are opposite to each other on adjacent air supply ports 200. This is done in order for the supplied air SA to impart clock-wise and counter-clockwise swirling motions at alternate ports.

The thickness of the guide vane is uniform throughout starting from the near (near-end) the central location 202, up to the far-end from the central location 202.

In an aspect of the invention, the air facilitation plug 203 can be in a conical shape or a near conical shape, or in a shape of a spherical upheaval as long as the aim of facilitating the incoming blown air smoothly guided to the guide vanes 201 is satisfied without any obstruction or without causing any loss of the incoming air, or without causing any vibration in the air flow system.

A person skilled in the art may make modifications to the design of the air facilitation plug 203 to achieve the aim of facilitating the incoming blown air smoothly guided to the guide vanes 201.

The air facilitation plug 203 when in conical shape or near conical shape, has a height that is equal to or less than the length L of the air supply port 200.

Each guide vane 201 has a uniform thickness throughout when measured at the far-end from the central location 202 up to when measured at the near-end from the central location 202.

The central location 202 is in a circular shape, wherein the circular shape central location has a diameter which is equal to the diameter of the base of the air facilitation plug 203, when the air facilitation plug 203 is in a conical shape or a near conical shape.

The dimension of the air supply unit 106, dimension of the air supply ports 200, which together would decide the number of air supply ports 200 in the air supply unit 106, and the dimensions of the guide vanes 201, number of guide vanes 201 in each air supply port 200 can be modulated by a person skilled in the art based on the required ventilation in a certain air conditioning space, which in turn may depend on the dimension, size, type of the air conditioning space, the geographical location, the weather condition in the area, etc.

Fig. 3A illustrates a front perspective view 301 of a panel consisting of two air supply ports.

Fig. 3B illustrates a rear perspective view 302 of a panel consisting of two air supply ports.

Each air supply port 200 may be embedded in a panel for ease of installation and ease of setting the plurality of air supply ports 200 together to form the air supply unit 106. In such a case each air supply panel includes one air supply port 200.

In an embodiment of the invention, as shown in Fig. 3A, and Fig. 3B, to simplify the arrangement, an air supply panel 300 includes two air supply ports 200. The inclination directions of the guide vanes 201 are opposite to each other on adjacent air supply ports 200.

Several such air supply panels 300 each having two air supply ports 200 can be arranged together in order to form the plurality of air supply ports 200 on the front surface 108 of the air supply unit 106.

While the present inventors have designed a two-port-air supply panel with the aim of ease of application over arranging several single ports, however, a person skilled in the art can arrange single ports by a suitable mechanism, such as interlocking, or it is also possible for a person skilled in the art to make a multi-port- air supply panel, such as a three-port- air supply panel, a four-port air supply panel, or an air supply panel with any number of ports, the aim of which is ease of installation.

Fig. 4 is a cross sectional view of the internal structure of each air supply port, which is an enlarged view of the Z-Z direction cross-section in Fig. 2B.

As shown in Fig. 4, a cross sectional view of the air supply unit is shown, which shows the cross sections of the central location 202 of the plurality of guide vanes 201, and the air facilitation plug 203.

As shown in Fig. 5, a porous plate 124 having a plurality of ventilation holes may be arranged in front of the front face 108 of the air supply unit 106 in parallel with the front face 108, and the porous plate 124 may be provided in front of each air supply port 200 at a predetermined gap G.

In this way, the supplied air SA blown out from each air supply port 200 is further supplied into the air-conditioning space 102 through the ventilation holes formed in the porous plate 124, so the air flow attenuation characteristics can be further improved.

For example, a return passage shown by a dotted line in Fig. 1 may be provided to return part of the exhaust gas EA to the air-conditioner 110 for reuse. Furthermore, the exhaust duct 112 may be omitted and the exhaust may be supplied to the air-conditioning space 102. The supplied air SA below sequentially pushes out the heated air remaining in the upper part of the air-conditioning space 102.

Furthermore, the exhaust duct 112 may be formed on the ceiling of the air-conditioning space 102. In addition, the ventilation system of the present disclosure is not limited to living rooms, but can also be applied to various air-conditioning spaces where people or various instruments are present as mentioned above.

The ventilation system may be configured to supply low-temperature air into an air-conditioning space. However, this ventilation system may also be used for heating air-conditioning in which high-temperature air is supplied into an air-conditioning space to heat the air.

In the ventilation system of the present disclosure, when high-temperature air is supplied from the air supply port into the air-conditioning space, the air in the air-conditioning space is induced to move together by the supplied high-temperature air.

In this way, when high-temperature air is supplied from the air supply port to the living area formed below in the air-conditioning space, the guide mechanism adds a rotating component to the supplied high-temperature air, thereby increasing the induction amount of the air in the air-conditioning space induced by the high-temperature air volume.

Therefore, the low-temperature air in the living area and the high-temperature air supplied from the air supply port into the air-conditioning space are mixed and heated, and the heated air (air) rises rapidly in the air-conditioning space after being supplied and reaches near the ceiling. In this way, pollutants etc. generated in the living area can be effectively diluted and moved near the ceiling.

Examples:
The present disclosure will now be explained in further detail by the following examples. These examples are illustrative of certain embodiments of the disclosure without limiting the scope of the present disclosure.

Example 1
An air supply unit 106 having “one hundred eight” air supply ports 200 formed on the front surface 108 of the air supply unit 106. Each air supply port 200 includes 12 guide vanes having an air facilitation plug 203 at the central location 202 of the plurality of guide vanes 201. These “one hundred eight” air supply ports 200 have been arranged in “fifty-four” air supply panels 300, wherein each air supply panel 300 includes two air supply ports 200. The fifty-four air supply panels 300 are joined together by an interlocking mechanism. The length of each air supply panel 300 is 276 mm, and the width of each air supply panel 300 is 131 mm. Each guide vane 201 is of length 64.5 mm when measured from the centre of axis of the air supply port 200, a width W of 32 mm when measured at the far end from the axis of the air supply port 200, and a width of 6 mm when measured at the near-end of the axis of the air supply port 200, and a thickness of 1 mm. The air supply port 200 has a length L of 20 mm, and a diameter of 129 mm. In the two air supply ports 200 in each air supply panel 300, the inclination directions of the guide vanes 201 are opposite to each other on adjacent air supply ports 200. The guide vanes 201 have been arranged within the air supply port 200 at an inclination angle of 32°, which are oppositely inclined in the adjacent air supply ports. The air facilitation plug 203 is in a near conical shape, where the apex is rounded instead of pointed. The air facilitation plug 203 has a height of 19 mm, and a base diameter of 19 mm. The supplied air SA was blown from an air-conditioning unit that provides low temperature air to the air supply unit 106 of the ventilation system of the instant invention.

Evaluation of Example 1: First air-conditioning space 102
As shown in Fig. 6, heat generating elements H1 to H8 (2 persons, 2 computers, 1 printer, and 3 tube lights) are present in an air-conditioning space 102. The air-conditioning space 102 is a room of size 12m X 10m having 11m height.

With H1-H8 present in this air-conditioning space 102, the room temperature measured at seven different locations of the room was found to be 35 °C, i.e., same in all the seven different locations of the room.

Sling Psychrometer was used to measure the temperature in the room.

After the ventilation system of the present disclosure (with air facilitation plug 203) installed in the room was switched on, and the temperature measurement was taken at the different locations, the temperature was found to be reduced to 22 °C in the location nearest to the ventilation system, and the temperature was reduced to 23 °C at the location in the room that is farthest from the ventilation system.

This indicates, the ventilation system of the instant invention effectively makes the air reach the farthest end of the room to provide the desired effect.

Comparative Example: Second air-conditioning space 102
Comparison with the prior art ventilation system

In a separate room (second air-conditioning space 102) of the same size (12m X 10m having 11m height) having same heat generating elements H1 to H8, a prior art air supply unit having similar number of air supply ports, and having all parameters and dimensions similar to as shown in example 1, but without the air facilitation plug 203, was fitted.

The room temperature measured at seven different locations of the room was found to be 35 °C, i.e., same in all the seven different locations of the room.

After the Prior art ventilation system (without air facilitation plug 203) installed in the room was switched on, and the temperature measurement was taken at the different locations, while the temperature was found to be reduced to 22 °C in the location nearest to the ventilation system, however the temperature was reduced only to 27 °C at the location in the room that is farthest from the ventilation system.

The difference between the prior art ventilation system (without air facilitation plug 203) and the ventilation system of the present disclosure (with air facilitation plug 203) has been summarised in Table 1.

Table 1
Without any Ventilation system
Temperature in the room With Prior Art Ventilation System (without air facilitation plug 203)
Temperature in the room With Present disclosure Ventilation System (with air facilitation plug 203)
Temperature in the room
Nearest location to the ventilation system 35 °C 22 °C 22 °C
Farthest location from the ventilation system 35 °C 27 °C 23 °C

This indicates that due to the air facilitation plug 203, the air reaches farther compared to the prior art ventilation system, which is evident from the better reduction in temperature i.e., reduced to 23 °C compared to 27 °C in the prior art ventilation system.

Advantages:
The ventilation system of the present disclosure has the following non-limiting advantages.
? Improved facilitation of the incoming blown air onto the guide vanes, enabling efficient swirl movement and reduces the vibrations and thus aids in a silent operation of the overall system.
? The improved swirling motion of the air improves the overall air distribution of air the room and hence improves the overall comfort of the occupants.
? Reduces vibration and noise in the air flow.
? Air moves to long distance.
? Air moves faster to the far end (from where the ventilation system is installed) of the room.
? Operational cost comes down.
? Efficiency of the ventilation system increases.

Applications:
The ventilation system of the present disclosure has the following non-limiting industrial applications.

- Air supply units for public spaces, private home, professional work spaces, hospitals, research labs etc.

Although the present disclosure is described in terms one or more embodiments, it is to be understood that they have been presented by way of example, and are not limiting. Thus, the present disclosure should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
, Claims:
1. An air supply unit 106 for a ventilation system 100 to provide swirling motion to the supplied air SA in an air-conditioning space 102 comprising: multiple air supply ports 200, wherein each air supply port 200 is equipped with plurality of guide vanes 201 to impart a rotational component to the supplied air SA blown into the air-conditioning space 102, wherein the plurality of guide vanes 201 are arranged radially around the central axis of the air supply port 200, and the plurality of guide vanes 201 are inclined at the same angle relative to a plane orthogonal to the central axis of the air supply port 200; the air supply port 200 is coaxial with the central axis of the air supply port 200,
characterized in that:
at the rear side of each air supply port 200 that faces towards the supplied air SA, the central location 202 of the plurality of guide vanes 201 includes an air facilitation plug 203,
wherein the air facilitation plug 203 helps in smoothly transmitting the supplied air SA onto the plurality of guide vanes 201.

2. The air supply unit 106 as claimed in claim 1, wherein the length L of the air supply port 200 is equal to or less than the maximum width W of the guide vanes 201 along the direction of the central axis of the air supply port 200.

3. The air supply unit 106 as claimed in claim 1, wherein the inclination directions of the guide vanes 201 on the adjacent air supply ports 200 are opposite to each other.

4. The air supply unit 106 as claimed in claim 1, wherein more than one air supply ports 200 are arranged in a panel 300, wherein multiple such panels 300 are joined together to form the air supply unit 106.

5. The air supply unit 106 as claimed in claim 1, wherein two air supply ports 200 are arranged in a panel 300, wherein multiple such panels 300 are joined together to form the air supply unit 106.

6. The air facilitation plug 203 as claimed in claim 1 is in conical shape or near conical shape.

7. The air facilitation plug 203 as claimed in claim 1 is in spherical shape or near spherical shape.

8. The air facilitation plug 203 as claimed in claim 1 when in conical shape or near conical shape, has a height that is equal to or less than the length L of the air supply port 200.

9. The guide vanes 201 as claimed in claim 1, wherein each guide vane 201 has a uniform thickness throughout when measured at its far-end from the central location 202 up to when measured at its near-end from the central location 202.

10. The central location 202 as claimed in claim 1 is in a circular shape, wherein the circular shape central location has a diameter which is equal to the diameter of the base of the air facilitation plug 203, when the air facilitation plug 203 is in a conical shape or a near conical shape.