阅读说明：本技术 一种双导流板的贴壁送风装置及其送风方法 (Wall-attached air supply device with double flow guide plates and air supply method thereof ) 是由 李安桂 王天琦 韩欧 李佳兴 于 2021-07-30 设计创作，主要内容包括：本发明涉及通风空调技术领域,公开了一种双导流板的贴壁送风装置,包括由上而下依次连接的风管、静压装置、送风板、第一导流板、第二导流板和柱体；在送风板的中部开有圆形风口,在圆形风口的周向开有环形条缝风口,圆形风口内装有挡风板,挡风板处于水平状态时,圆形风口关闭；挡风板处于倾斜状态时,圆形风口开启；第一导流板和第二导流板均为弧形板,在第一导流板的中心开有第一圆孔,在第二导流板的中心开有第二圆孔。还公开了送风方法,采用柱壁贴附射流送风,送风气流贴附于柱体向下流动,撞击到地面后沿地面扩散开来,形成空气湖,室内热源产生的热羽流卷吸气流或上部排风口抽吸气流使得气流缓慢上升,达到类似置换通风的效果。(The invention relates to the technical field of ventilation air conditioners, and discloses a wall-attached air supply device with double flow guide plates, which comprises an air pipe, a static pressure device, an air supply plate, a first flow guide plate, a second flow guide plate and a cylinder, wherein the air pipe, the static pressure device, the air supply plate, the first flow guide plate, the second flow guide plate and the cylinder are sequentially connected from top to bottom; a circular air port is formed in the middle of the air supply plate, an annular strip seam air port is formed in the circumferential direction of the circular air port, a wind shield is arranged in the circular air port, and when the wind shield is in a horizontal state, the circular air port is closed; when the wind shield is in an inclined state, the circular air opening is opened; the first guide plate and the second guide plate are both arc-shaped plates, a first round hole is formed in the center of the first guide plate, and a second round hole is formed in the center of the second guide plate. The air supply method is also disclosed, the column wall is attached to jet flow for air supply, the air flow of the air supply is attached to the column body and flows downwards, the air flow is attached to the column body and then spreads along the ground after impacting the ground to form an air lake, and the air flow slowly rises due to entrainment of the hot plume generated by the indoor heat source or suction of the air flow from the upper air outlet, so that the effect similar to replacement ventilation is achieved.)

1. An adherence air supply device with double guide plates is characterized by comprising an air pipe (2), a static pressure device (3), an air supply plate (4), a first guide plate (9), a second guide plate (11) and a column body (12) which are sequentially connected from top to bottom;

a circular air port (6) is formed in the middle of the air supply plate (4), an annular strip seam air port (5) is formed in the circumferential direction of the circular air port (6), and the circular air port (6) and the annular strip seam air port (5) form an air supply port;

a wind shield (7) is arranged in the circular tuyere (6), and when the wind shield (7) is in a horizontal state, the circular tuyere (6) is closed; when the wind shield (7) is in an inclined state, the circular air opening (6) is opened;

first guide plate (9) and second guide plate (11) are the arc, and it has first round hole to open at the center of first guide plate (9), and it has the second round hole to open at the center of second guide plate (11), first round hole and second round hole intercommunication.

2. The adherent air supply device of a pair of guide plates of claim 1, characterized by that, the air supply board (4) is connected with first guide plate (9) through the bearing column (8), there is a through hole in the center of the bearing column (8), when the wind deflector (7) rotates to the vertical state, the lower half of the wind deflector (7) locates in the through hole.

3. The wall-attached air supply device with double flow deflectors as claimed in claim 1, wherein the wind deflector (7) is hinged in the circular air port (6), and an air valve (13) is mounted on the outer wall of the wind deflector (7).

4. The coherent air supply device with double flow deflectors as claimed in claim 1, wherein the first flow deflector (9) and the second flow deflector (11) are connected by a plurality of connecting columns (10).

5. The wall-adherent air supply device with double flow guide plates as claimed in claim 1, wherein the air pipe (2) is provided with an air volume adjusting device (1).

6. The coherent air supply device with double flow deflectors as claimed in claim 1, wherein the cross section of the first flow deflector (9) and the second flow deflector (11) is a quarter of a circular arc, and the radian is the same.

7. The wall-adherent air supply device with double flow deflectors as claimed in claim 1, wherein the cylinder (12) is a cylinder (12), and the air outlet area at the air supply plate (4) is not less than 0.8 times of the area of the air supply plate (4).

8. The wall-adherent air supply device with double flow deflectors as claimed in claim 1, wherein the static pressure device (3) is internally provided with a sound attenuation layer, and the outer wall of the static pressure device is wrapped with a reinforcing layer.

9. The wall-mounted air supply device with double deflectors as recited in claim 1, wherein the air supply speed of the air supply opening is 0-4 m/s.

10. The method of any one of claims 1 to 9, wherein the method comprises the following steps:

when the annular strip seam air port (5) independently supplies air, the supplied air flow enters the static pressure device (3) through the air pipe (2), then flows out through the annular strip seam air port (5), is guided by the first guide plate (9) to form a parabolic jet flow, and is supplied into a room, and the supplied air flow flows attached to the ground;

when the annular strip seam air port (5) and the circular air port (6) are opened simultaneously, air flow sent out by the circular air port (6) deflects after passing through the second guide plate (11) so as to realize air supply attached to the cylinder (12), and air flow sent out by the annular strip seam air port (5) deflects after being guided by the first guide plate (9) and under the combined action of air flow entrainment around so as to realize air supply attached to the cylinder (12).

Technical Field

The invention relates to the technical field of ventilation air conditioners, in particular to a wall-sticking air supply device with double flow guide plates and an air supply method thereof.

Background

In the indoor ventilation technology, the common airflow organization in the public building environment mainly has two forms of mixed ventilation and displacement ventilation:

the mixed ventilation drives air to flow by mechanical force, the air supply and the indoor air are mixed strongly, the temperature and humidity of the whole room can be uniformly distributed, meanwhile, an air supply system is usually arranged at the upper part of the room and does not occupy the space at the lower part, but the mixed ventilation aims at eliminating all indoor loads, a large amount of indoor air is sucked in the air supply process, and the ventilation efficiency is lower;

the replacement ventilation mainly aims at eliminating partial load, namely cold and hot load of a working area, the comfort or production requirements of service objects of the working area are guaranteed, indoor intensive mixing is less likely to happen, and the ventilation efficiency is high. However, the replacement ventilation cost is high, the defects of occupying effective space (installing a static pressure device and a pipeline system) at the lower part exist, the same cold load is borne, the air volume of the system is large, and the energy consumption at the tail end is high.

The existing ventilation column air supply modes applied to building spaces such as airports, subway stations and the like are mostly mixed ventilation, the height of an air supply outlet exceeds 3m, air supply airflow is delivered into a working area, the air supply uniformity is poor, and the ventilation efficiency is low; meanwhile, when air is supplied in winter, indoor hot air flows upwards under the influence of the heating buoyancy lift force, and the phenomenon of 'head warm and foot cool' is easy to occur to personnel. Based on this, the applicant proposed in patent CN101988733R a rectangular cylindrical surface attached jet air supply method, the attached jet air supply can effectively save the lower space of the building, meanwhile, the air supply air current flows downwards along the wall surface by the coanda effect, and spreads along the ground after impacting the ground, forming an air lake with low air speed and small temperature difference, reducing the mixing with the indoor air in the air current conveying process, and reducing the loss of the conveying heat and the attenuation of the kinetic energy, thereby reducing the energy consumption of the ventilation air-conditioning system.

However, this method has found the following disadvantages in practical engineering applications:

for the existing building, the installation position of a column body serving as a bearing column is determined in advance, and the annular static pressure device is installed on the upper portion of the column body, so that the installation mode is difficult when the existing column body structure is not damaged, and if the static pressure device installation position is not reserved near the bearing column in the early stage of the project, the static pressure device installation position is difficult to use in the later stage; meanwhile, the existing patent is greatly influenced by the environment, if the indoor structure arranges the column body at the corner, only air is blown to two sides, and the economical efficiency of installing the annular static pressure device is low; meanwhile, the existing patent is greatly influenced by the height of an indoor room, the height of an air supply outlet is the height of the room, and for a tall space, the distance between vertical attaching sections is too long, so that unnecessary speed attenuation is caused, an effective air lake cannot be formed on the ground, the energy utilization efficiency is low, and when heat is supplied in winter, the air supply airflow cannot reach the ground under the action of thermal buoyancy.

Disclosure of Invention

The invention aims to provide a wall-attached air supply device with double flow guide plates and an air supply method thereof, which solve the problems that the existing device is limited by the environment, the air supply height can not be adjusted, the air supply effect is not ideal and the like.

The invention is realized by the following technical scheme:

a wall-adherent air supply device with double flow guide plates comprises an air pipe, a static pressure device, an air supply plate, a first flow guide plate, a second flow guide plate and a cylinder which are sequentially connected from top to bottom;

a circular air port is formed in the middle of the air supply plate, and an annular strip seam air port is formed in the circumferential direction of the circular air port; the circular air opening and the annular strip seam air opening form an air supply opening;

a wind shield is arranged in the circular air port, and when the wind shield is in a horizontal state, the circular air port is closed; when the wind shield is in an inclined state, the circular air opening is opened;

the first guide plate and the second guide plate are both arc-shaped plates, a first round hole is formed in the center of the first guide plate, a second round hole is formed in the center of the second guide plate, and the first round hole is communicated with the second round hole.

Further, the air supply plate is connected with the first guide plate through the bearing column, a through hole is formed in the center of the bearing column, and when the wind shield rotates to a vertical state, the lower half portion of the wind shield is located in the through hole.

Furthermore, the wind shield is hinged in the circular air port, and an air valve is installed on the outer wall of the wind shield.

Furthermore, the first guide plate is connected with the second guide plate through a plurality of connecting columns.

Furthermore, an air quantity adjusting device is arranged on the air pipe.

Furthermore, the cross sections of the first guide plate and the second guide plate are quarter circular arcs, and the radians are the same.

Furthermore, the cylinder is a cylinder, and the air outlet area at the air supply plate is not less than 0.8 time of the area of the air supply plate.

Further, the inside of static pressure device is equipped with the noise elimination layer, and the outer wall parcel has the back up coat.

Furthermore, the air supply speed of the air supply outlet is 0-4 m/s.

The invention also discloses an air supply method of the adherence air supply device with the double flow guide plates, which comprises the following conditions:

when the annular strip seam air port independently supplies air, the supplied air flow enters the static pressure device through the air pipe and flows out through the annular strip seam air port, and forms parabolic jet flow after being guided by the first guide plate and is supplied into a room, and the supplied air flow flows attached to the ground;

when the annular strip seam air port and the circular air port are opened simultaneously, air flow sent out by the circular air port deflects after passing through the second guide plate so as to realize air supply attached to the cylinder, and air flow sent out by the annular strip seam air port deflects after being guided by the first guide plate and then receiving the combined action of air flow entrainment around so as to realize air supply attached to the cylinder.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention discloses a wall-attached air supply device with double flow guide plates, which comprises an air pipe, a static pressure device, an air supply plate, a first flow guide plate, a second flow guide plate and a cylinder which are sequentially connected from top to bottom, wherein the cylinder does not depend on a bearing upright post of a building, the air supply height can be selectively installed according to the requirement, and the installation is not limited by the environment; the middle part of the air supply plate is provided with a circular air port, the circumferential direction of the circular air port is provided with an annular strip seam air port, the circular air port and the annular strip seam air port form an air supply port, and through the innovative design of a guide plate structure, when only the annular strip seam air port is opened for air supply, air supply airflow is guided by a first guide plate and then is in a parabolic jet flow, then obliquely impacts the ground to change the air supply direction to be parallel to the ground, and the air lake is formed by spreading on the ground; when the annular strip seam air port and the circular air port supply air together, the air supply flow enters the static pressure device through the air pipe, part of the air supply flow passes through the circular air port and then is guided by the second guide plate, the air flow is attached to the column body to flow downwards, and the air flow is deflected to form an air lake after impacting the ground; part of the air supply flow is sent out from the annular strip seam air port and is deflected under the entrainment action of the surrounding air flow after being guided by the first guide plate, and the air supply flow is attached to the column body to flow; the column wall is attached to jet flow for air supply, the air flow of the air supply is attached to the column body and flows downwards, and the air flow is spread along the ground after impacting the ground to form an air lake; the hot plume entrainment air current that indoor heat source produced or upper portion air exit suction air current make the air current rise slowly, reach the effect of similar replacement ventilation, compare with current air current tissue form, reduced the entrainment of air supply process to the room air, directly reach the workspace with fresh air, the workspace is close to the air supply environment, therefore more do benefit to the health, can reach energy-conserving effect simultaneously.

Furthermore, the deep bead articulates in circular tuyere, installs the blast gate on the deep bead outer wall, and deep bead accessible blast gate control independently opens and stops to change the amount of wind and the wind speed of supply-air outlet.

Furthermore, the cross sections of the first guide plate and the second guide plate are quarter circular arcs, the radians are the same, and the air flow guide plate is similar to a bowl, so that the air flow attaching column can flow downwards.

Drawings

FIG. 1 is a schematic view of the structure of an air supply device of the present invention;

FIG. 2 is an exploded view of the blower of the present invention;

FIG. 3 is a schematic view of a partial structure of the blower plate assembly of the present invention;

FIG. 4 is a schematic view showing the flow of the blowing air when the tuyere is opened simultaneously;

FIG. 5 is a schematic view showing the flow of the blast air when only the annular slit tuyere is opened;

FIG. 6 is a schematic view of a plurality of air delivery devices for a plurality of vent posts within a building environment;

FIG. 7 is a schematic view of an air delivery arrangement within a building environment using a vent post alone;

fig. 8 is a schematic view applied in a subway station;

FIG. 9 is a schematic view of an existing ventilation mode of a subway station;

FIG. 10 is a graph of indoor velocity and altitude distribution under the parameter settings of the examples of the present invention (examples 1, 2, 3) and comparative example 4;

fig. 11 is a cloud of velocity temperature distributions at a cross section (y ═ 6.5) in the return air of the room in example 3, (a1) is the cloud of velocity distributions at the cross section, and (a2) is the cloud of temperature distributions at the cross section;

fig. 12 is a cloud view of velocity temperature distribution at a cross section (y ═ 1.0) of the indoor air blowing port of comparative example 4, (a1) is the cloud view of the cross section velocity distribution, and (a2) is the cloud view of the cross section temperature distribution;

wherein, 1 is an air quantity adjusting device; 2 is an air pipe; 3 is a static pressure device; 4 is a blast plate; 5 is an annular strip slit air port; 6 is a circular tuyere; 7 is the deep bead, 8 is the heel post, 9 is first guide plate, 10 is the spliced pole, 11 is the second guide plate, 12 is the cylinder, 13 is the blast gate.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.

As shown in fig. 1-3, the invention discloses a wall-attached air supply device with double flow guide plates, which comprises an air pipe 2, a static pressure device 3, an air supply plate 4, a first flow guide plate 9, a second flow guide plate 11 and a cylinder 12 which are sequentially connected from top to bottom; a circular air port 6 is formed in the middle of the air supply plate 4, and an annular strip seam air port 5 is formed in the circumferential direction of the circular air port 6; the circular air opening 6 and the annular strip seam air opening 5 form an air supply opening; a wind shield 7 is arranged in the circular air port 6, and when the wind shield 7 is in a horizontal state, the circular air port 6 is closed; when the wind shield 7 is in an inclined state, the circular air opening 6 is opened; the first guide plate 9 and the second guide plate 11 are both arc-shaped plates, a first round hole is formed in the center of the first guide plate 9, a second round hole is formed in the center of the second guide plate 11, and the first round hole is communicated with the second round hole.

The air pipe 2 is connected with the static pressure device 3 through a flange, the form of the air pipe 2 is not limited, the air pipe can be a round pipe, a square pipe, a straight pipe, a bent pipe and the like, and the material is a fireproof heat-preservation flexible connecting pipe or a metal pipe.

The air pipe 2 is connected with an air supply unit, and the air supply unit adopts a combined air conditioning unit, a fan coil or a fresh air unit and the like and is selected according to actual needs.

The static pressure device 3 is arranged above the column body 12, the inner surface of the shell of the static pressure device 3 is attached with a silencing material, and the outside can be reinforced by a reinforcing material.

The air duct 2 is a fireproof heat-insulating flexible connecting pipe or a metal pipe and is arranged below a ceiling, in a suspended ceiling, on or below other supports and the like.

Preferably, as shown in fig. 2 and 3, the air supply plate 4 and the first guide plate 9 are connected through a bearing column 8, a through hole is formed in the center of the bearing column 8, and when the wind deflector 7 rotates to be in a vertical state, the lower half part of the wind deflector 7 is located in the through hole.

As shown in figure 3, the wind shield 7 is hinged in the circular air opening 6, the air valve 13 is installed on the outer wall of the wind shield 7, and the wind shield 7 can be controlled by the air valve 13 to be independently started and stopped, so that the air volume and the air speed of the air supply opening can be changed.

As shown in fig. 5, when the annular slit air port 5 supplies air independently, the air flow can form parabolic jet flow to send the air flow into the room after passing through the first guide plate 9, so that the air supply distance can be prolonged; as shown in fig. 4, when the annular slit air port 5 and the circular air port 6 are opened simultaneously, the air flow sent out by the circular air port 6 is deflected after passing through the second guide plate 11 to realize air supply attached to the cylinder 12, and the air flow sent out by the annular slit air port 5 is deflected after passing through the combined action of the flow guidance of the first guide plate 9 and the entrainment of the surrounding air flow to realize air supply attached to the cylinder 12.

The diameter of the column 12 is D, the height of the air supply plate 4 from the ground is H, the sum of the air outlet areas of the circular air port 6 and the annular strip slit air port 5 is not less than 0.8 time of the area of the air supply plate 4, and the size of the air supply port is determined according to the size of the static pressure device 3. The air supply speed range of the air port is 0-4 m/s.

The key point of the invention is that the height of the air supply outlet is not limited by the indoor environment through the innovative design of the structure while the column wall is attached for air supply, the length of the vertical attachment area is reduced through the reduction of the height of the air supply outlet while the column wall is ensured to be completely attached, thereby reducing unnecessary momentum attenuation, ensuring that the air supply airflow is effectively supplied to the indoor working area, and effectively forming an air lake on the ground; when the indoor load is reduced, only the annular strip slit air opening 5 can be opened, the air supply flow is delivered into the working area in a parabolic jet mode, then the air supply flow obliquely impacts the ground and deflects to flow parallel to the ground to form an air lake, and the air supply uniformity is ideal.

Application example 1

For a large space and a room with the height larger than 5 meters, the prior art usually adopts the top side air supply or replacement ventilation of the spherical nozzle, and the air supply port is arranged above the room, so that the height is higher, the problems of low ventilation efficiency, limited use environment and the like exist, and the air supply effect is not ideal.

In the embodiment, ventilation columns are uniformly and reasonably arranged in a room, and the air supply unit can adopt a combined air conditioning unit or a fresh air unit and the like, is attached to the wall surface of the column body 12 by virtue of the coanda effect, flows downwards to the ground, and spreads to the whole room along the ground to form an air lake; the air slowly rises under the entrainment action or the air flow intersection action of the hot plume, so that the effect of replacement ventilation is achieved.

As shown in FIG. 6, the room has the structural parameters of 32m × 32m × 6m (length × width × height), the radius of the column 12 is 0.4m, the radius of the air supply outlet is 0.4m, and the height from the ground is 1.75m, and the indoor design specification parameters are obtained by theoretical calculation, wherein for the hot air supply condition in winter, the indoor design temperature is 26 ℃, the relative humidity is 60%, the air supply temperature is 36 ℃, the relative humidity is 55%, and the air supply amount is 21714.7m³H is used as the reference value. The return air inlet is arranged on the upper part of the ceiling.

The return air opening position is defined here to be located in the upper part of the ceiling for the following reasons: 1. if the air return opening is arranged at the lower part of the space, the effect of attaching air supply to the ground to form an air lake can be influenced, and the problem that hot air is sent into a personnel working area in winter is solved by utilizing the air lake, so that the thermal comfort of personnel is improved, and the position of the air return opening needs to be moved upwards; 2. for a tall space, the air return opening is arranged on the ceiling, and after the air lake is formed on the ground by attaching the air supply airflow, the air can flow upwards through the entrainment effect of the air return opening on the upper part, which is in the same direction with the influence of the thermal buoyancy lifting force and plays a promoting role in discharging the indoor mixed airflow.

In the embodiment, four ventilation columns are uniformly arranged indoors, the distance between every two ventilation columns is 16m, the air supply speed is 3m/s, the sizes of five air return ports are 400 multiplied by 400mm, the indoor top is reasonably arranged, and the total air exhaust amount is equal to the total air supply amount.

Embodiment 1 illustrates that the air supply device can effectively reduce the air supply height and improve the air supply effect in a tall space. Meanwhile, the original air supply mode cannot convey air to the ground in winter, and the air supply height of the original column wall attaching is too high, so that the air flow cannot effectively form an ideal air lake on the ground.

Application example 2

For office space, as shown in fig. 7, the structural parameters are 16m × 16m × 3m, the ventilation column is arranged in the middle of a room, the indoor structure is not influenced, excessive space is not occupied, when heating is performed in winter, a proper indoor unit is selected, the indoor design temperature is 25 ℃, the air supply temperature is 36 ℃, and the air supply quantity is 5428.7m³And/h, arranging the air return opening at the upper part of the room. The radius of the column 12 is 0.4m, and the size of the air supply opening is 0.4 m.

Application example 3

For the space such as the subway station and the like, because of the symmetry, a section of the space is taken for analysis, as shown in fig. 8, the structural parameters are 42m × 13m × 3.5m, 3 ventilation columns are arranged in the middle of the station, the distance is 16m, the air supply temperature is 18 ℃, the relative humidity is 55%, the indoor temperature is 24 ℃ and the relative humidity is 50% under the refrigeration working condition in summer. The air delivery is 16286m³H, air supply speed of 3m/s, 2 air return openings of 600 x 600mm, total air exhaustThe amount is equal to the total air supply.

Comparative example 4

The rest is the same as the embodiment 3, the air supply mode adopts the existing mixed ventilation, one-side air supply and one-side air return design, as shown in fig. 9, the size of 5 air supply openings is 550mm multiplied by 550mm, the distance from the closer side wall is 1m, the air supply quantity is 16335m³The air supply speed is calculated to be 3m/s at the time of/h. The sizes of the 4 air return openings are 300mm multiplied by 300mm, the distance from the closer side wall is 1.3m, and the total air exhaust quantity is equal to the total air supply quantity.

The examples of the invention (i.e. examples 1, 2, 3, comparative example 4) were analysed:

FIG. 10 is a graph comparing the speed (see FIG. a) and temperature (see FIG. b) as a function of zone height for the parameter settings of examples 1-3 and comparative example 4. According to the design specification of heating ventilation and air conditioning of civil buildings (GB 50736-. In areas where people stay for a short time, such as shopping malls, subway stations and the like, indoor design parameters are improved by 1-2 ℃ when the people stay for a long time under the cooling working condition, and the indoor design parameters are reduced by 1-2 ℃ when the people stay for a long time under the heating working condition.

As can be seen from the comparison graph of the speed change in fig. 10(a), as the height increases, the speed of each embodiment decreases, the average blowing speed of each embodiment in the whole area is less than 0.35m/s, and for the cooling working condition of the short-term staying area, the blowing speed is preferably less than 0.5m/s, so that the blowing feeling generated to the human body in the embodiment is small; however, the air blowing speed in the long stay region is less than 0.25m/s, and therefore, the feeling of blowing is easily generated at the ankle, and the air blowing speed can be reduced. Under the heating working condition, the air supply speed of the embodiment 1 at the ankle (the distance from the ground is 0.1m) is lower, and the blowing feeling to people is smaller.

As can be seen from the temperature change comparison diagram in FIG. 10(b), under the heat supply working condition, the vertical temperature difference of the embodiment 1 is smaller, and the temperature difference (0-2m) in the personnel working area is less than 1 ℃; in the embodiment 2, the vertical temperature difference of the supplied air is the largest, and the vertical temperature difference is approximately 2 ℃ in a personnel working area, so the comfort level of a human body is relatively weak; according to the two embodiments, the arrangement of the ventilation columns can improve the phenomenon of head and foot cooling in winter heat supply working conditions and improve the comfort level of indoor personnel. Under the cooling working condition, the indoor temperature of the example 3 and the comparative example 4 is increased along with the increase of the height, and the vertical temperature difference is smaller, but the indoor temperature of the comparative example 4 (the existing mixed ventilation mode) is lower than the standard of 24-26 ℃, so the comfort is poorer than that of the example 3; therefore, under the conditions of the same indoor load, the same air supply quantity and the cold supply working condition, the novel ventilation column is superior to the existing ventilation mode in the comfort degree of indoor personnel, and provides a more comfortable rest environment for the indoor personnel.

In conclusion, when the ventilation column is used for supplying heat in winter, the air supply airflow is attached to the column wall and flows downwards, the problems that the vertical temperature difference is large, the head is warm and the feet are cold are effectively solved, the temperature from the head to the feet shows the trend of integral rising, and the requirement of heat comfort of the head and the feet of a human body is met; when cooling in summer, the comfort level of indoor personnel is superior to that of the existing ventilation mode, and a comfortable rest environment is created for the indoor personnel.

Comparison between example 3 according to the invention and comparative example 4 according to the prior art

As can be seen from fig. 11(a1) and 12(a1), in the aspect of speed distribution, the speed of air supply after reaching the ground in the embodiment 3 is less than 0.3m/s by the sticking air supply method, so that the feeling of blowing does not occur to people and is not obvious at ankles of people; in contrast embodiment 4, mixed ventilation is adopted for air supply, in an actual subway station environment, an air supply outlet is usually arranged above a waiting area, and the downward flowing speed of air supply airflow is 2m/s, so that when the subway station waits below an air inlet, the blowing feeling is strong, the speed is attenuated after the air supply outlet impacts the ground, the air supply speed of part of places is greater than 0.3m/s and can reach 0.5m/s, and the comfort of a human body is poor.

As can be seen from fig. 11(a2) and 12(a2), in the aspect of temperature distribution, the air flow of the air supply in the embodiment 3 passes through the attached air supply, the indoor vertical temperature difference of the section is less than 3 ℃, the indoor temperature can reach the standard thermal comfort level i, and the phenomenon of head warming and foot cooling is effectively solved; comparative example 4 adopts mixed ventilation mode, under the same parameter setting (same indoor heat load, same air supply volume), air supply temperature is less than the I level standard of thermal comfort level, and indoor perpendicular difference in temperature exists and is greater than 3 ℃ of territory simultaneously, and consequently indoor personnel comfort level is relatively poor, and the supply-air outlet is located the district top of waiting simultaneously, and air supply temperature is lower, can let the people feel cold when producing the sense of blowing to the people, and the travelling comfort is relatively poor.

To sum up, for current mixed ventilation air supply mode, when adopting the ventilation mode for the ventilation post of attached air supply, can improve indoor personnel's heat comfort level, personnel's sense of blowing reduces, provides a comfortable rest environment for the personnel.

In order to further compare the advantages and disadvantages of the design of the ventilation column of the invention and the existing air supply mode, the energy utilization effectiveness of the air flow distribution mode is considered, and the energy utilization efficiency can be expressed by an energy utilization coefficient eta, namely

In the formula, tp, tn and to are respectively the exhaust air temperature, the average temperature of the working area and the air supply temperature.

The energy use coefficients of example 3 and comparative example 4 were calculated to be 1.04 and 0.72, respectively, by the formula, and thus the energy use efficiency was improved by 31% using the vent column design.

In conclusion, the invention has obvious technical advancement, obvious economical efficiency and strong practicability, and can be popularized, referred and applied in subway station ventilation air-conditioning systems, high and large space building air-conditioning systems or agricultural building environments. It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.