CN213630791U - Dual-purpose attached ventilation air current environment of tie epidemic regulation and control device - Google Patents
Dual-purpose attached ventilation air current environment of tie epidemic regulation and control device Download PDFInfo
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- CN213630791U CN213630791U CN202022403607.8U CN202022403607U CN213630791U CN 213630791 U CN213630791 U CN 213630791U CN 202022403607 U CN202022403607 U CN 202022403607U CN 213630791 U CN213630791 U CN 213630791U
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Abstract
The utility model discloses a flat epidemic disease dual-purpose attached ventilation airflow environment regulating device, which comprises a static pressure box, wherein the upper part of the static pressure box is provided with a mushroom head device and a desktop; the mushroom head device comprises a large air pipe, an arc-shaped plate and an air outlet plate, wherein the air outlet plate is provided with an air outlet, the bottom plate of the static pressure box is provided with an air inlet, the air inlet is connected with an underfloor air supply system, and a fan is arranged on the air inlet; a top plate of the static pressure box is provided with a central air supply outlet and a side air supply outlet; the central air supply outlet is connected with a small air pipe, and a guide plate is arranged above the side air supply outlet; the large air pipe is sleeved outside the small air pipe and is connected with a lifting mechanism, and the lifting mechanism is used for driving the large air pipe to lift; when the mushroom head device descends, air is supplied by the side air supply openings on the two sides, and an air curtain with a certain speed is formed above the arc-shaped plate, so that cross infection among personnel is avoided. When the mushroom head device is lifted, airflow is sent out from the middle air supply outlet, a layer of air lake is formed on the table top, and the microenvironment around people is improved.
Description
Technical Field
The utility model belongs to the technical field of the warm logical air conditioner, a dual-purpose attached ventilation air current environment of tie epidemic is regulated and control device is related to.
Background
With the progress of science and technology, more and more work is shifted from outdoor to indoor, and the indoor environment is directly related to the health condition and the working state of personnel. Common ventilation modes include mixed ventilation and replacement ventilation, wherein the mixed ventilation forms a uniform thermal environment indoors by sending treated outdoor air and partial return air, dilutes pollutants generated indoors, and has poor air quality and high energy consumption. The displacement ventilation forms an air lake on the upper part of the floor through the lower air supply outlet, the ventilation efficiency is higher, the indoor air quality is better, the energy consumption is low, but the indoor load capable of being born is lower. The underfloor air supply passes through the raised floor, and the air current is from the raised floor to the room air supply via the floor air inlet, and ventilation efficiency is higher, and air quality is better, nevertheless can cause personnel "warm the head", "cold foot" phenomenon often, and the raised floor occupies indoor space simultaneously, and the indoor load that can bear is also lower, and these factors have also restricted the development of underfloor air supply.
The station air supply is different from the traditional air conditioning system, the background air supply system is used for supplying air under the floor, the air conditioning system is combined on each workbench by taking the workbench as a unit, and the air conditioning system directly performs air conditioning on the region where people nearby the station move, so that higher-quality air and better thermal comfort can be provided. Traditional station air supply has sufficient excess pressure for guaranteeing the baffle supply-air outlet, and baffle station air conditioner often combines the small-size fan of baffle wind channel bottom to use together, and this kind of station air supply can only satisfy the demand of microenvironment around the human body, but can not avoid the cross infection between the personnel effectively in the epidemic situation period.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that above-mentioned prior art exists, the utility model aims to provide a dual-purpose attached ventilation air current environment of tie epidemic control device not only satisfies the demand of microenvironment around the personnel, can play the effect of avoiding cross infection between personnel moreover.
The utility model discloses a realize through following technical scheme:
a dual-purpose attached ventilation airflow environment regulation and control device for epidemic prevention comprises a static pressure box, wherein a mushroom head device and a desktop are arranged at the upper part of the static pressure box; the mushroom head device comprises a large air pipe, an arc-shaped plate and an air outlet plate, wherein the air outlet plate is provided with an air outlet, the large air pipe is connected with the air outlet plate, and the arc-shaped plate is connected with the air outlet plate;
the air supply mode of the room adopts under-floor air supply, the bottom plate of the static pressure box is provided with an air inlet, the air inlet is connected with an under-floor air supply system, a fan is arranged on the air inlet and is used for extracting under-floor airflow and sending the under-floor airflow into the static pressure box;
the top plate of the static pressure box is provided with an air supply outlet which comprises a central air supply outlet arranged in the middle and side air supply outlets positioned on two sides of the central air supply outlet; a small air pipe is connected to the central air supply outlet, a guide plate is arranged above the side air supply outlet, and the guide plate is connected with the tabletop; the edge of the guide plate is at a distance from the edge of the arc-shaped plate, and the distance forms a gap for allowing the airflow to pass through;
the large air pipe is sleeved outside the small air pipe and connected with a lifting mechanism, and the lifting mechanism is used for driving the large air pipe to lift;
when the mushroom head device is in a descending position, an air curtain is formed above the arc-shaped plate; when the mushroom head device is in the ascending position, a desktop air lake area is formed on the desktop.
Further, go out the tuber plate and include baffle and lower baffle, the air outlet is opened on last baffle, goes up baffle and lower baffle parallel arrangement, goes up the baffle and is connected with the arc, and big tuber pipe is located the baffle and between the baffle down, and it has the through-hole that a plurality of and little tuber pipe correspond to open on the big tuber pipe.
Furthermore, the lifting mechanism adopts an automatic telescopic rod, and the automatic telescopic rod comprises an outer telescopic rod, an inner telescopic rod and a screw rod;
the inner parts of the outer telescopic rod and the inner telescopic rod are hollow cavities, the outer diameter of the inner telescopic rod is smaller than the inner diameter of the outer telescopic rod, the bottom of the outer telescopic rod is closed, the top end of the outer telescopic rod is opened, the inner telescopic rod is arranged in the outer telescopic rod, the top end of the inner telescopic rod penetrates through the top end opening of the outer telescopic rod and extends upwards, the bottom end of the inner telescopic rod is in threaded connection with a screw rod through an installation part, the bottom of the outer telescopic rod is provided with a motor, and an output shaft at the upper end of the motor is fixedly connected with the bottom of the screw rod through a;
the outer telescopic rod is arranged in the static pressure box, and the inner telescopic rod penetrates through a top plate of the static pressure box and then is connected with the strong wind pipe.
Furthermore, the upper plane of the guide plate is flush with the upper plane of the desktop;
the height of the big air pipe is the same as that of the small air pipe, and when the big air pipe rises, the upper plane of the lower partition plate is flush with the upper plane of the table top.
Further, the air outlet adopts a strip slit type air outlet.
Furthermore, the air supply opening and the side air supply opening are both provided with a plurality of air supply openings.
Further, the cross-sectional shape of the arc-shaped plate is a semicircular arc.
Furthermore, a silencing layer is arranged on the inner wall of the static pressure box, and the silencing layer is made of glass wool felt.
Furthermore, the air curtain is divided into a jet flow core area, a transition area and a entrainment area, and the height of the jet flow core area is higher than that of a breathing area when a human body sits quietly.
Further, the speed of the air blowing port is (0.4-2) m/s.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a flat epidemic disease dual-purpose attached ventilation airflow environment regulating device, which comprises a static pressure box, wherein the upper part of the static pressure box is provided with a mushroom head device and a desktop; the mushroom head device comprises a large air pipe, an arc-shaped plate and an air outlet plate, the bottom of the plenum box is connected with the underfloor air supply, a plurality of fans are arranged on an opening of the underfloor of the plenum box, the fans extract underfloor air flow to enter the plenum box, a central air supply opening and a side air supply opening are formed in the upper plate of the plenum box, the side air supply opening aims at forming an air curtain during epidemic situations, and the central air supply opening aims at creating a comfortable microenvironment for personnel. The guide plate is used for drainage in epidemic situation, and the air current is drained to the arc through the gap between guide plate and the arc, utilizes the attached and the conda effect of the spherical wall of arc to form the air curtain that can avoid cross infection between personnel above the arc. The central air supply outlet is connected with a small air pipe which is fixed at the upper part of the static pressure box and plays a role in transmitting air flow, the mushroom head device can be lifted through a lifting mechanism, the mushroom head device is lifted, the air flow is sent out through the central air supply outlet in the middle of the upper plate of the static pressure box and impacts the lower part of the arc-shaped plate to form a spherical impact area, the spherical impact area is induced to the desktop through the mushroom head device to form a desktop air lake area, and the desktop air lake area can also suppress human body thermal plume besides creating a micro environment required by sitting posture personnel, so that the air quality of a respiratory area of the personnel is improved, and energy conservation and better air quality are; in an epidemic situation, the mushroom head device is put down, airflow is sent out through side air feeding openings on the left side and the right side of the upper plate of the plenum chamber, under the action of the guide plate, the coanda effect and the airflow polymerization technology are utilized, the airflow forms a spherical surface attaching area on the arc-shaped plate, and the airflow is sent out from a gap between the guide plate and the arc-shaped plate, so that the airflow speed in the spherical surface attaching area is relatively high, the airflow in the spherical surface attaching area is polymerized at the highest point of the arc-shaped plate to form a high-pressure center, and a layer of air curtain with a certain speed is formed above the arc-shaped plate, so that the effect of avoiding cross infection.
Furthermore, a noise elimination layer is additionally arranged in the static pressure box, so that noise is eliminated, and a good office environment is provided.
Further, based on the attenuation of the air curtain speed and the air speed of the air outlet of the static pressure box, the air speed of the air outlet of the static pressure box is 0.4-2m/s, when the air speed of the static pressure box is more than 2m/s, even if a noise elimination material is arranged inside the static pressure box, the influence of large noise can be generated, and when the air speed of the air outlet is less than 0.4m/s, the speed and the height of the air curtain jet flow core area can not meet the requirements of sedentary personnel.
Drawings
FIG. 1 is a schematic structural view of the mushroom head device of the dual-purpose attached ventilation airflow environment control device for epidemic prevention of the invention when descending;
FIG. 2 is a schematic structural view of the mushroom head device of the dual-purpose attached ventilation airflow environment control device for epidemic prevention according to the present invention when lifted;
FIG. 3 is a schematic view of the overall structure of the dual-purpose attached ventilation airflow environment control device for epidemic prevention of the present invention;
FIG. 4 is a schematic structural view of a mushroom head device of a flat epidemic dual-purpose attached ventilation airflow environment regulating device;
FIG. 5 is a schematic view of a fan layout;
FIG. 6 is a layout view of air supply ports;
FIG. 7 is a top view of FIG. 3;
FIG. 8 is a schematic structural view of an arcuate plate;
FIG. 9 is a schematic view of the air outlet;
FIG. 10 is a schematic structural diagram of a lifting mechanism;
FIG. 11 is a velocity diagram of the air curtain of the dual-purpose adhering ventilation airflow environment control device for peace and epidemic diseases;
FIG. 12 is a table top attachment speed chart of the dual-purpose attachment ventilation airflow environment control device for peace and epidemic diseases;
FIG. 13 is a table top attachment temperature chart of the flat air epidemic prevention dual-purpose attachment ventilation airflow environment control device.
Wherein: the air-conditioning device comprises a base plate 1, a static pressure box 2, a side air supply opening 3, a small air pipe 4, a through hole 5, an arc-shaped plate 6, an upper partition plate 7, a large air pipe 8, a lower partition plate 9, a top plate 10, a guide plate 11, a table top 12, an outer telescopic rod 13, an inner telescopic rod 14, a screw rod 15, a motor 16, an output shaft 17 and a coupler 18.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1-3, the utility model discloses a dual-purpose attached ventilation airflow environment control device for epidemic prevention, which comprises a static pressure box 2, wherein a mushroom head device and a table top 12 are arranged on the upper part of the static pressure box 2; the mushroom head device comprises a large air pipe 8, an arc-shaped plate 6 and an air outlet plate, wherein an air outlet is formed in the air outlet plate, the large air pipe 8 is connected with the air outlet plate, and the arc-shaped plate 6 is connected with the air outlet plate; the air supply mode of the room adopts under-floor air supply, the bottom plate 1 of the static pressure box 2 is provided with an air inlet, the air inlet is connected with an under-floor air supply system, and a fan is arranged on the air inlet and is used for extracting under-floor airflow and sending the under-floor airflow into the static pressure box 2; as shown in fig. 6, the top plate 10 of the static pressure box 2 is provided with air supply outlets, including a central air supply outlet arranged in the middle and side air supply outlets 3 arranged on two sides of the central air supply outlet; a small air pipe 4 is connected to the central air supply outlet, a guide plate 11 is arranged above the side air supply outlet 3, and the guide plate 11 is connected with a table top 12; as shown in fig. 7, the edge of the baffle 11 is at a distance from the edge of the arc plate 6, which distance forms a gap for the air flow to pass through; the large air pipe 8 is sleeved outside the small air pipe 4, the large air pipe 8 is connected with a lifting mechanism, and the lifting mechanism is used for driving the large air pipe 8 to lift; when the mushroom head device is at a descending position, the airflow sent out from the side air supply opening 3 rises along the upper part of the arc-shaped plate 6, the airflow is attached to the arc-shaped plate 6, and an air curtain is formed above the arc-shaped plate 6; when the mushroom head device is in the ascending position, the central air supply outlet is used as an air supply outlet, the air flow impacts the lower part of the arc-shaped plate 6 and then descends to the table top 12, and a table top air lake area is formed on the table top 12 due to the attaching effect.
As shown in fig. 4, the air outlet plate includes an upper partition plate 7 and a lower partition plate 9, the air outlet is formed on the upper partition plate 7, the upper partition plate 7 is arranged in parallel with the lower partition plate 9, the upper partition plate 7 is connected with the arc-shaped plate 6, the large air pipe 8 is positioned between the upper partition plate 7 and the lower partition plate 9, and the large air pipe 8 is provided with a plurality of through holes 5 corresponding to the small air pipes 4. Big tuber pipe 8 and little tuber pipe 4 are highly the same, and big tuber pipe 8 and little tuber pipe 4 coincide mutually when mushroom head device descends, and big tuber pipe 8 promotes highly being equal to little tuber pipe 4 height when mushroom head device rises, goes out the tuber plate and goes up and down together along with big tuber pipe 8.
Adopt the utility model discloses the device, the air current is from the 2 lower part trompils of static pressure case to static pressure case 2 in through the fan suction, see off from side air supply opening 3 and central supply-air outlet respectively. When the mushroom head device descends, the air outlet does not work at this time basically, the air flow is mainly sent out from the side air supply opening 3 and then sent out from the gap between the arc-shaped plate 6 and the guide plate 11, the coanda effect and the air flow polymerization technology are utilized, the high-pressure center is formed at the highest position of the arc-shaped plate 6, and then the air curtain for avoiding cross infection is formed above the arc-shaped plate 6 as shown in the figure I. When the mushroom head device rises, all the components of the mushroom head rise along with the mushroom head device, air flows through the small air pipe 4 and the big air pipe 8 to impact the lower part of the arc-shaped plate 6 and is sent out through the air outlets on the two sides, and an air lake is formed on the table top 12.
When the mushroom head device descends, the lower partition plate 9 of the mushroom head device is attached to the top plate 10 on the upper portion of the static pressure box 2, the arc-shaped plate 6 and the guide plate 11 of the table top 12 are separated by 5-20mm, the small air pipe 4 and the large air pipe 8 are overlapped at the moment, and the heights of the small air pipe and the large air pipe are the same. The size of the small air pipe 4 is 5-10mm smaller than that of the outer surface of the large air pipe 8, and the size of the inner surface of the large air pipe 8 is the same as that of the small air pipe 4.
The upper plane of the guide plate 11 is flush with the upper plane of the table top 12; the height of the large air pipe 8 is the same as that of the small air pipe 4, and when the large air pipe 8 rises, the upper plane of the lower partition plate 9 is flush with the upper plane of the table top 12. When the mushroom head device is lifted, the lower partition plate 9 and the table top 12 are on the same horizontal plane, and the lifting height of the mushroom head device is the same as the thickness of the table top 12.
In order to reduce the noise generation in the static pressure box 2, the general design requires that the section air speed in the static pressure box 2 is generally less than 2m/s, and the air supply speed of an air supply opening can be adjusted by controlling the rotating speed of a fan, and the speed is generally controlled to be 0.5-2 m/s.
In order to ensure that an air curtain is formed above the head of the mushroom when the mushroom head device is lowered, it is necessary to control the degree of curvature of the curved plate 6. As shown in fig. 8, in the design, the arc-shaped plate 6 is a semi-circular arc, the air flow can be well attached to the arc-shaped plate 6, a spherical attachment area is formed on the arc-shaped plate 6, then the air flow forms a high-pressure center on the arc-shaped plate 6, and an air curtain with a certain speed is formed above the arc-shaped plate 6.
The lifting of the mushroom head device is completed through a lifting mechanism, the power source of the lifting mechanism can be controlled hydraulically or electrically, and a specific structure is provided.
As shown in fig. 10, the lifting mechanism specifically includes an outer telescopic rod 13, an inner telescopic rod 14, and a screw rod 15; the inner portions of the outer telescopic rod 13 and the inner telescopic rod 14 are hollow cavities, the outer diameter of the inner telescopic rod 14 is smaller than the inner diameter of the outer telescopic rod 13, the bottom of the outer telescopic rod 13 is closed and the top end of the outer telescopic rod 13 is opened, the inner telescopic rod 14 is arranged in the outer telescopic rod 13, the top end of the inner telescopic rod 14 penetrates through the top end opening of the outer telescopic rod 13 and extends upwards, the bottom end of the inner telescopic rod 14 is connected with a screw rod 15 through a mounting portion in a threaded mode, a motor 16 is arranged at the bottom of the outer telescopic rod 13, an output shaft 17 at the upper end of the motor 16 is fixedly connected with the bottom of the screw rod 15 through a coupler 18, and the top end of the inner telescopic rod 14 is.
The outer telescopic rod 13 is arranged in the static pressure box 2, the inner telescopic rod 14 penetrates through the top plate 10 of the static pressure box 2 and then is connected with the large air pipe 8, and the screw rod 15 is driven by the motor 16 to rotate forwards and backwards, so that the inner telescopic rod 14 is driven to ascend or descend, and finally the large air pipe 8 is driven to ascend or descend.
As shown in figure 5, 1-3 small fans are arranged on the lower plate of the static pressure box 2 and fixed on the lower plate of the static pressure box 2, so that enough residual pressure is ensured at the outlet of the static pressure box 2.
As shown in fig. 9, the air outlet is a rotatable louver air outlet, the rotatable louver air outlet is a slit air outlet, the rotatable angle is 0-180 degrees, when the mushroom head device descends, the louver air outlet is in a closed state, the rotation angle is 0 degrees, and when the mushroom head device ascends, the rotation angle of the louver air outlet can be adjusted according to personal conditions.
As shown in fig. 6, the central air supply opening and the side air supply openings 3 are plural.
The utility model discloses a dual-purpose attached ventilation air current environment of tie epidemic is regulated and control device principle as follows:
according to the theory of hydrodynamics, the air flow is in a static pressure box 2, and the pressure includes static pressure and dynamic pressure:
P＝Pj+Pd Pd＝1/2ρVd^2
Pjstatic pressure of air flow in an air inlet area of the static pressure box 2;
Pddynamic pressure of airflow in an air inlet area of the static pressure box 2;
rho is the density of gas kg/m ^ 3;
Vdis the airflow speed m/s;
when the air current in the static pressure case 2 is sent out from the side air supply opening 3, the air current strikes the table top 12 guide plate 11, the dynamic pressure is converted into static pressure, the static pressure in the area is increased, the dynamic pressure is reduced, the back air current is sent out through the gap between the table top 12 guide plate 11 and the arc-shaped plate 6, the actual air speed of the air current sent out is higher than the air speed sent out from the side air supply opening 3 due to the fact that the width of the gap is small, the air current forms an air curtain above the arc-shaped plate 6 through the spherical surface attaching area, and the air curtain is divided into a jet flow. There is a decay in velocity of the air curtain, where the primary concern is the jet core region, and the axial velocity decay of the air curtain is given by the equation:
the section velocity distribution is:
the expanded thickness is:
b0.5＝0.068x
the cross-sectional flow is:
U0is the initiation of a flat jetSpeed;
b0is half of the width of the air supply outlet;
Umis the maximum velocity of the transition section;
x is the distance from a certain position to the air supply outlet;
when the air current that flows in the air inlet area of static pressure case 2 meets the supply-air outlet, consider local resistance, the velocity of flow that its static pressure difference produced is:
wherein P isjThe static pressure of the air flow in the air inlet area of the static pressure box 2 is shown, and mu is a flow coefficient;
according to fan type selection, can reach the effect that forms the air curtain and improve human surrounding microenvironment, fan wind speed calculation is:
Q＝CMΔt V＝Q/(CΔtρ) V＝vF
q is the heat to be treated and is expressed in J;
c is the specific heat capacity of air, and the unit is J/(kg DEG C);
m is mass flow rate, and the unit is kg/s;
delta t is the temperature rise in units of;
rho is density, and the unit is kg/m ^ 3;
f is the area of the cross section of the fan and the unit is m2；
v is the fan speed in m/s.
When the mushroom head device is lifted, airflow forms an air lake on the table top 12, in the process, after fluid is ejected from the air outlet, the upper boundary of the air lake continuously sucks surrounding fluid like free turbulent jet flow, blending action is continuously developed downwards, the lower boundary is subjected to the action of friction on a solid wall surface, a wall surface boundary is continuously developed upwards, and a potential flow core area is formed in the middle. The jet can then be divided into two regions in the main body section according to the maximum flow velocity across the section: the upper part is a free mixing area; the lower part is a wall boundary layer area. The distance from the position of maximum flow velocity on the cross section to the wall surface can be defined as the boundary layer thickness.
The attached jet is simplified by using the boundary layer theory, and the corresponding motion equation can be expressed as:
wherein tau istIs the wall shear stress. The functional relation of the velocity distribution on the main jet flow section can be obtained by combining the motion equation with the momentum equation and then sorting the experimental data as follows:
the attached jet has velocity attenuation in the development process, and the attenuation formula of the axis velocity is as follows:
the expansion speed is as follows:
b0.5＝0.068x
the cross-sectional flow is:
U0the initial velocity of the flat jet;
b is the width of the air supply outlet;
Umis the maximum velocity of the transition section;
x is the distance from a certain position to the air supply outlet.
The box body of the static pressure box 2 adopts a galvanized steel plate with the thickness of 2.5mm, the silencing material adopts glass wool felt with the thickness of 10mm, and the box body is tightly attached to the inner side wall of the box body of the static pressure box 2.
In order to verify the utility model discloses the air curtain that the mushroom head device formed, when the mushroom head device put down, need accurately obtain the section velocity distribution condition that forms the air curtain, select for use indoor gas flow to calculate the most standardized k-e standard calculation model of using for this reason, select for use the SIMPLE algorithm, the second order windward form is solved the discrete equation.
The air speed at the inlet of the static pressure box 2 can be adjusted by adjusting the rotating speed of the fan, the air speed at the inlet of the static pressure box 2 is set to be 0.5m/s, and a vertical air curtain with a certain speed can be formed in the middle of the peaceful and epidemic dual-purpose attached ventilation airflow environment regulating and controlling device as shown in figure 11, so that cross infection among people can be avoided.
Adopt the utility model discloses a dual-purpose attached ventilation air current environment of tie epidemic regulation and control device, when the mushroom head device puts down, can form the air curtain that has certain speed directly over arc 6, effectual air curtain speed should be in 1.0-1.5m/s within range generally speaking, just can play the effect of avoiding cross infection between personnel, as shown in fig. 10, the air curtain is from bottom to top, air curtain speed is attenuate gradually, and along with the reduction of speed, pressure crescent, the air quantity of air is reduced around the air curtain entrainment, the scope of air curtain reduces gradually, but the air current temperature risees gradually. Based on the attenuation of the air curtain speed and the air speed of the air supply opening of the static pressure box 2, the air speed of the air supply opening of the static pressure box 2 is 0.4-2m/s, when the air speed of the static pressure box 2 is more than 2m/s, even if a noise elimination material is arranged inside the static pressure box 2, the influence of large noise can be generated, and when the air speed of the air supply opening is less than 0.4m/s, the speed and the height of the air curtain jet flow core area can not meet the requirements of a sitting worker. As shown in the figure five, the inlet velocity of the static pressure box 2 is 0.5m/s, the air curtain formed above the arc 6 is 1.2m/s in the core area of the jet, and the velocity gradually changes to 1m/s and reaches 0.4m/s as the velocity decays. As can be seen from the figure, the speed of the jet flow core area is 1.2m/s, and the function of avoiding the cross infection of the sedentary people can be achieved.
As shown in fig. 2 and 3, the mushroom head device is in a lifting state, and the large air pipe 8 is connected with the small air pipe 4. The height of the large air duct 8 is equal to the height of the fixed small air duct 4.
In order to verify the utility model discloses mushroom head device is in the attached air lake that forms of desktop 12, when mushroom head device rises, need accurately reach the speed distribution condition that forms the air lake, selects for use indoor gas flow to calculate the most standardized k-e standard calculation model of using for this reason, selects for use the SIMPLE algorithm, and the second order windward form is solved discrete equation.
The rotating speed of the fan is adjusted to adjust the air speed at the inlet of the static pressure box 2, the air speed at the inlet is set to be 0.5m/s, and the air supply temperature is set to be 20 ℃, so that the micro environment around the sitting dummy can be adjusted.
Adopt the utility model discloses a dual-purpose attached ventilation air current environment of tie epidemic control device, when the mushroom head device rises, the air current is sent out from strong tuber pipe 8 and is strikeed 6 hypoplastron of arc, form sphere striking district, because the coanda effect, can form one deck air lake at desktop 12, 12 attached districts of desktop promptly, can know by the velocity map in figure 11, the air lake of desktop 12 can effectively flow, after the fluid jets out from the supply-air outlet, upper portion border is the same with free turbulent jet, constantly imbibition fluid on every side, attenuate gradually at desktop 12 vertical direction speed, from 1.5 ms to 1m/s, until 0.5m/s, at desktop 12 horizontal direction, lower part border receives the effect of solid surface upper friction, horizontal direction speed is also attenuating gradually. Meanwhile, the dummy can form vertical flow in two directions, one part of cold air flow flows to the lower part of the human body under the action of self gravity, so that the hot plume of the human body can be suppressed, the air quality of a breathing area of a person is improved while a comfortable lower environment is provided for the person, and the other part of air flow flows to the breathing area of the human body to cool the head and improve the air quality. As can be seen from the velocity diagrams and the temperature diagrams in FIGS. 12 and 13, the inlet temperature of the static pressure box 2 is 293k, when the airflow reaches the table top 12, the temperature rises to 294k, the temperature rises to about 1k, the airflow attached to the table top 12 and flowing to the lower part of the human body can play a role of cooling the lower space, the temperature of the lower space is about 296k, meanwhile, the thermal plume of the lower part of the human body can be intercepted, the temperature gradient of the lower part of the human body is reduced, people feel more comfortable, the other part of the airflow can cool the upper space of the human body, the temperature of the upper space of the human body is about 297k, the temperature gradient of the upper part of the human body is reduced. The temperature gradient has certain influence on the thermal comfort of the human body, and the thermal comfort of personnel is better through the optimization of the temperature gradient. The utility model discloses provide comfortable microenvironment for personnel, only need the regional heat load of treatment personnel official working, compare in traditional mixed air supply and underfloor air supply, it is more energy-conserving.
Claims (10)
1. A dual-purpose attached ventilation airflow environment regulation and control device for epidemic prevention is characterized by comprising a static pressure box (2), wherein a mushroom head device and a table top (12) are arranged at the upper part of the static pressure box (2); the mushroom head device comprises a large air pipe (8), an arc-shaped plate (6) and an air outlet plate, wherein an air outlet is formed in the air outlet plate, the large air pipe (8) is connected with the air outlet plate, and the arc-shaped plate (6) is connected with the air outlet plate;
the air supply mode of the room adopts under-floor air supply, the bottom plate (1) of the static pressure box (2) is provided with an air inlet, the air inlet is connected with an under-floor air supply system, a fan is arranged on the air inlet, and the fan is used for extracting under-floor airflow and sending the under-floor airflow into the static pressure box (2);
the top plate (10) of the static pressure box (2) is provided with an air supply outlet, and the air supply outlet comprises a central air supply outlet arranged in the middle and side air supply outlets (3) positioned on two sides of the central air supply outlet; a small air pipe (4) is connected to the central air supply outlet, a guide plate (11) is arranged above the side air supply outlet (3), and the guide plate (11) is connected with a table top (12); the edge of the guide plate (11) is at a distance from the edge of the arc-shaped plate (6), and the distance forms a gap for allowing the airflow to pass through;
the large air pipe (8) is sleeved outside the small air pipe (4), the large air pipe (8) is connected with a lifting mechanism, and the lifting mechanism is used for driving the large air pipe (8) to lift;
when the mushroom head device is in a descending position, an air curtain is formed above the arc-shaped plate (6); when the mushroom head device is in the raised position, a desktop air lake area is formed on the desktop (12).
2. The attached ventilation airflow environment regulating device for the peaceful epidemic disease as claimed in claim 1, wherein the air outlet plate comprises an upper partition plate (7) and a lower partition plate (9), the air outlet is formed in the upper partition plate (7), the upper partition plate (7) and the lower partition plate (9) are arranged in parallel, the upper partition plate (7) is connected with the arc-shaped plate (6), the large air pipe (8) is positioned between the upper partition plate (7) and the lower partition plate (9), and the large air pipe (8) is provided with a plurality of through holes (5) corresponding to the small air pipes (4).
3. The device for regulating and controlling the environment of attached ventilation airflow for peacetime and epidemic disease of claim 1, wherein the lifting mechanism comprises an outer telescopic rod (13), an inner telescopic rod (14) and a screw rod (15);
the inner parts of the outer telescopic rod (13) and the inner telescopic rod (14) are hollow cavities, the outer diameter of the inner telescopic rod (14) is smaller than the inner diameter of the outer telescopic rod (13), the bottom of the outer telescopic rod (13) is closed, the top end of the outer telescopic rod (13) is opened, the inner telescopic rod (14) is arranged in the outer telescopic rod (13), the top end of the inner telescopic rod (14) penetrates through the top end opening of the outer telescopic rod (13) and extends upwards, the bottom end of the inner telescopic rod (14) is in threaded connection with the screw rod (15) through an installation part, the bottom of the outer telescopic rod (13) is provided with a motor (16), and an output shaft (17) at the upper end of the motor (16) is fixedly connected with the bottom of the screw rod (15) through a coupler (18);
the outer telescopic rod (13) is arranged in the static pressure box (2), and the inner telescopic rod (14) penetrates through a top plate (10) of the static pressure box (2) and then is connected with the large air pipe (8).
4. The device for regulating and controlling the environment of the attached ventilation airflow for the peace and epidemic disease of claim 1, wherein the upper plane of the guide plate (11) is flush with the upper plane of the table top (12);
the height of the large air pipe (8) is the same as that of the small air pipe (4), and when the large air pipe (8) rises, the upper plane of the lower partition plate (9) is flush with the upper plane of the table top (12).
5. The apparatus of claim 1, wherein the air outlet is a slit-shaped air outlet.
6. The device for regulating and controlling the environment of attached ventilation airflow for peaceful epidemic disease according to claim 1, wherein the number of the central air supply openings and the side air supply openings (3) is multiple.
7. The attached ventilation airflow environment regulating and controlling device for the peaceful epidemic disease as claimed in claim 1, wherein the cross-sectional shape of the arc-shaped plate (6) is a semicircular arc.
8. The device for regulating and controlling the environment of the attached ventilation air flow for the peace and epidemic disease according to claim 1, wherein a silencing layer is arranged on the inner wall of the static pressure box (2), and the silencing layer is made of glass wool felt.
9. The device of claim 1, wherein the air curtain comprises a core jet area, a transition area and a suction area, and the core jet area is higher than the breathing area of the human body when sitting still.
10. The apparatus of claim 1, wherein the speed of the air supply opening is (0.4-2) m/s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022403607.8U CN213630791U (en) | 2020-10-26 | 2020-10-26 | Dual-purpose attached ventilation air current environment of tie epidemic regulation and control device |
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| CN202022403607.8U CN213630791U (en) | 2020-10-26 | 2020-10-26 | Dual-purpose attached ventilation air current environment of tie epidemic regulation and control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023020836A (en) * | 2021-07-29 | 2023-02-09 | 兵庫県公立大学法人 | Indoor atmosphere purification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023020836A (en) * | 2021-07-29 | 2023-02-09 | 兵庫県公立大学法人 | Indoor atmosphere purification system |
| JP7320799B2 (en) | 2021-07-29 | 2023-08-04 | 兵庫県公立大学法人 | Indoor atmosphere purification system |
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