CN109869886B - Directional air supply arrangement of energy-conserving air conditioner based on rotatory efflux - Google Patents
Directional air supply arrangement of energy-conserving air conditioner based on rotatory efflux Download PDFInfo
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Abstract
The invention discloses an energy-saving air-conditioning directional air supply device based on rotary jet flow, which comprises a main ventilation cavity, a cyclone generator, an annular rectifying honeycomb panel and a three-stage multidirectional dual-form air supply plate block, wherein the main ventilation cavity is provided with a plurality of air inlets; the cyclone generator comprises a cyclone generator cavity shell, a motor supporting frame, a direct current motor and a spiral rotating body; the annular rectifying honeycomb plate is sleeved on the outer shell of the cavity of the cyclone generator and is positioned in the main ventilation cavity; the three-stage multidirectional dual-form air supply plate comprises a plate shell, a first-stage annularly-arranged directional tapered spray pipe group, a second-stage annularly-arranged directional tapered spray pipe group and a cyclone air outlet; the plate shell comprises a bottom shell and a shell; the upper end of the bottom shell is arranged at the lower end of the main ventilation cavity; the shell is coaxially connected with the bottom shell; the cyclone air outlet is communicated with the lower end of the cyclone generator cavity shell; the invention realizes the regionalization and individuation of air supply, realizes the effect of obviously reducing the ventilation volume under the condition of the same air volume required at a fixed point and achieves the aims of energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the field of heating and ventilation technology air conditioning equipment, and particularly relates to an energy-saving air conditioning directional air supply device based on rotary jet flow.
Background
With the rapid development of science and technology and economy, the requirements of people on life are not limited to simple clothes and eating houses at present. People have higher requirements for the living environment. The building energy conservation and comfort become higher requirements of people for living environment without any accident.
In the modern society, the energy consumption of buildings is about 1/3 of the total energy consumption in China. The energy consumption of the heating, ventilating and air conditioning is a big household in the energy consumption of the building, the energy consumption of the heating, ventilating and air conditioning accounts for 65% of the energy consumption of the building in developed countries according to statistics, the energy consumption of the heating, ventilating and air conditioning accounts for 356% of the total energy consumption, the proportion of the energy consumption of the heating, ventilating and air conditioning accounts for 22.75% of the total energy consumption, and therefore the important point of the energy saving work of the building is the energy saving of the heating, ventilating.
Therefore, the modification of the existing air conditioner is not slow. Most of air conditioners on the market at present are plane type direct blowing air, and the air is difficult to maintain energy, is easy to dissipate, cannot realize indoor directional air supply, and cannot realize air supply regionalization, so that the energy consumption of the air conditioner can be increased.
Accordingly, there is a need in the art for an air supply apparatus that overcomes the above-mentioned problems.
Disclosure of Invention
The technical scheme adopted for achieving the aim of the invention is that the energy-saving air-conditioning directional air supply device based on the rotary jet flow is characterized in that: the three-stage multi-directional double-form air supply device comprises a main ventilation cavity, a cyclone generator, an annular rectifying honeycomb plate and a three-stage multi-directional double-form air supply plate.
The main ventilation cavity is cylindrical, the upper end of the main ventilation cavity is provided with an air inlet, the air inlet is connected with an air conditioner, and the lower end of the main ventilation cavity is provided with an air outlet.
The cyclone generator comprises a cyclone generator cavity shell, a motor supporting frame, a direct current motor and a spiral rotating body.
The outer shell of the cavity of the cyclone generator is cylindrical. The cyclone generator cavity shell is positioned in the main ventilation cavity, the upper end of the cyclone generator cavity shell is level with the upper end of the main ventilation cavity, and the lower end of the cyclone generator cavity shell penetrates out of the main ventilation cavity.
The motor support frame is arranged on the inner wall of the cavity shell of the cyclone generator.
The direct current motor is installed on the motor support frame.
The spiral rotary body is mounted on an output shaft of the direct current motor.
The annular rectifying honeycomb plate is sleeved on the outer shell of the cavity of the cyclone generator and is positioned inside the main ventilation cavity.
The three-stage multidirectional dual-form air supply plate comprises a plate shell, a first-stage annular arrangement directional tapered spray pipe group, a second-stage annular arrangement directional tapered spray pipe group and a cyclone air outlet.
The plate shell comprises a bottom shell and a shell.
The bottom shell is a cylindrical shell, the upper end and the lower end of the bottom shell are both open, and an annular flange I is arranged in the opening at the lower end of the bottom shell.
The upper end of the bottom shell is installed at the lower end of the main ventilation cavity.
The shell is a cylindrical shell, the upper end and the lower end of the shell are both open, and a circular flange II is arranged in the opening at the lower end of the shell.
The shell is coaxially connected with the bottom shell, and the upper end of the shell is fixed on the inner wall of the circular flange I of the bottom shell.
The cyclone air outlet is a hollow cylinder. The cyclone air outlet is arranged on the inner wall of the circular ring flange II of the shell.
The cyclone air outlet is communicated with the lower end of the cyclone generator cavity shell.
The one-stage annular arrangement directional reducing nozzle group comprises a plurality of directional reducing nozzles I.
The plurality of directional reducing spray pipes I are uniformly distributed on the circular ring flange I in a circumferential mode and are arranged at an elevation angle with the surface of the circular ring flange I respectively, and each directional reducing spray pipe I is communicated with the inside of the bottom shell.
The two-stage annularly-arranged directional tapered nozzle group comprises a plurality of directional tapered nozzles II.
The plurality of directional reducing spray pipes I are uniformly distributed on the circular ring flange I in a circumferential mode, the surface of the circular ring flange I is scattered in an elevation angle mode, and each directional reducing spray pipe I is communicated with the inside of the bottom shell.
The two-stage annularly-arranged directional tapered nozzle group comprises a plurality of directional tapered nozzles II.
The plurality of directional reducing spray pipes II are uniformly distributed on the circular ring flange II in a circumferential manner, the surface of the circular ring flange II is dispersed in an elevation angle manner, and each directional reducing spray pipe II is communicated with the inside of the shell.
When air conditioning air blows from the air inlet of the main ventilation cavity, the air conditioning air is divided into two parts. And a part of wind is rectified by the annular rectifying honeycomb plate, enters the first-stage annular arrangement directional tapered spray pipe group and the second-stage annular arrangement directional tapered spray pipe group, and is finally sent out from the directional tapered spray pipe I and the directional tapered spray pipe II in a directional mode. And the other part of the wind passes through the cavity shell of the cyclone generator, and the direct-current motor rotates to drive the spiral rotating body to rotate, so that the generated rotating wind is sent out from the cyclone air outlet.
Further, main ventilation cavity includes main ventilation cavity left side shell and main ventilation cavity right side shell.
The main ventilation cavity is formed by splicing a left main ventilation cavity shell and a right main ventilation cavity shell.
Further, the connection part of the directional reducing nozzle I and the circular ring flange I and the connection part of the directional reducing nozzle II and the circular ring flange II are both provided with sealing rings.
Furthermore, a temperature sensor is arranged outside the three-stage multidirectional double-form air supply plate.
And the directional reducing spray pipe I and the directional reducing spray pipe II are both provided with switches. The switch is connected with the automatic control system. The temperature sensor outputs a temperature signal to the automatic control system, and the automatic control system changes the contact area between the switch and the pipe orifice through automatic control so as to complete the regulation of the air output.
Further, the switch is a sheet-type spout opening and closing device.
Further, the top surface of the annular flange I is denoted as an H-surface. The top surface of the circular flange II is marked as an L surface.
And recording each directional tapered nozzle I and two directional tapered nozzles II which are closest to the directional tapered nozzle I as a group. And marking the intersection point of the axis of the directional tapered spray pipe I and the plane H as an intersection point I, and marking the intersection points of the axes of the two adjacent directional tapered spray pipes II and the plane L as an intersection point II and an intersection point III respectively. And recording a perpendicular bisector of a connecting line between the intersection point II and the intersection point III as a perpendicular line I, and recording the projection of the perpendicular line I on the H surface as a perpendicular line II. The perpendicular line II passes through the intersection point I.
Further, the direct current motor controls the switch drive of the electromagnetic relay through the single chip microcomputer.
The technical effect of the invention is undoubted, and the invention has the following advantages:
1) according to the invention, the cyclone and the direct blowing air sprayed by the directional gradually-reduced nozzle are combined, so that the regionalization and individuation of air supply are realized, the defects of the traditional air supply are optimized, the effect of obviously reducing the ventilation quantity under the condition that the air quantity required at a fixed point is the same is realized, the purposes of energy saving and emission reduction are achieved, meanwhile, the comfort level of a human body in an air-conditioned room is increased, and the effect of air propagation is added.
2) The invention can adapt to different environmental requirements, and can be used for household and industrial equipment.
3) The air outlet of the air conditioner can realize fixed-point air supply by changing the air supply form of the air outlet and matching the sensing device when the air supply in the whole room is not needed, and compared with the traditional air outlet, the fixed-point directional air supply can effectively reduce the air supply amount under the condition of ensuring that the requirement of indoor personnel is not changed, thereby achieving the purposes of energy conservation and emission reduction. The user can realize regionalization and individualization of air supply by adjusting the effective air outlet area of the air supply outlet by means of modern information technology. The unnecessary air supply amount is reduced, and the comfort degree of the human body is increased.
4) Simple structure, easy realization and convenient installation and use.
Drawings
FIG. 1 is a cross-sectional oblique view of the present invention;
FIG. 2 is a full sectional view of the present invention;
FIG. 3 is a schematic structural view of a cyclone generator;
FIG. 4 is a schematic structural diagram 1 of a three-stage multi-directional dual-form blower plate;
FIG. 5 is a schematic structural view of a three-stage multi-directional dual-type air supply plate block 2;
FIG. 6 is a schematic plan view of the present invention;
FIG. 7 is a schematic view of the installation of the annular rectifying honeycomb panel;
FIG. 8 is a schematic view of the arrangement of the vortex generators;
FIG. 9 is a numbered view of the angular disposition of a directionally tapered nozzle cluster;
FIG. 10 is a schematic coordinate diagram of a directionally tapered nozzle cluster;
FIG. 11 is a table listing angles of directionally tapered nozzles;
FIG. 12 is a model schematic 1 of a computational process;
FIG. 13 is a model schematic 2 of a computational process;
FIG. 14 is a graph of the variation of the dimensionless flow of the jet at different Ω of the rotating jet along the longitudinal axis of the jet;
FIG. 15 is a model schematic 3 of a computational process;
fig. 16 is a model schematic of the calculation process 4.
In the figure: the air supply system comprises a main ventilation cavity 1, a main ventilation cavity left shell 11, a main ventilation cavity right shell 12, a cyclone generator 2, a cyclone generator cavity shell 21, a motor support frame 22, a direct-current motor 23, a spiral rotating body 24, an annular rectifying honeycomb plate 3, a three-stage multi-direction dual-form air supply plate block 4, a plate block shell 41, a bottom shell 411, an annular flange I4111, a shell 412, an annular flange II4121, a first-stage annular arrangement oriented tapered spray pipe group 42, an oriented tapered spray pipe I421, a second-stage annular arrangement oriented tapered spray pipe group 43, an oriented tapered spray pipe II431, a cyclone air outlet 44 and a switch 5.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1 to 7, an energy-saving directional air supply device of an air conditioner based on rotary jet flow comprises a main ventilation cavity 1, a cyclone generator 2, an annular rectifying honeycomb panel 3 and a three-level multi-directional dual-form air supply plate 4.
The main ventilation cavity 1 comprises a main ventilation cavity left shell 11 and a main ventilation cavity right shell 12.
The main ventilation cavity 1 is a cylinder formed by splicing a main ventilation cavity left shell 11 and a main ventilation cavity right shell 12, an air inlet is formed in the upper end of the main ventilation cavity, the air inlet is connected with an air conditioner, and an air outlet is formed in the lower end of the main ventilation cavity.
The cyclone generator 2 comprises a cyclone generator cavity shell 21, a motor support frame 22, a direct current motor 23 and a spiral rotator 24.
The cyclone generator cavity shell 21 is cylindrical. The cyclone generator cavity shell 21 is located in the main ventilation cavity 1, the upper end of the cyclone generator cavity shell is level with the upper end of the main ventilation cavity 1, and the lower end of the cyclone generator cavity shell penetrates out of the main ventilation cavity 1.
The motor support frame 22 is installed on the inner wall of the cyclone generator cavity housing 21 by welding.
The dc motor 23 is mounted on the motor support frame 22.
The helical rotary body 24 is mounted on an output shaft of the dc motor 23.
The annular rectifying honeycomb plate 3 is sleeved on the cyclone generator cavity shell 21 and is positioned inside the main ventilation cavity 1.
The three-stage multi-directional dual-form air supply plate 4 comprises a plate shell 41, a first-stage annularly-arranged directional tapered spray pipe group 42, a second-stage annularly-arranged directional tapered spray pipe group 43 and a cyclone air outlet 44.
The panel housing 41 includes a bottom case 411 and a housing 412.
The bottom shell 411 is a cylindrical shell, the upper end and the lower end of the bottom shell are both open, and a circular flange I4111 is arranged in the opening at the lower end.
The upper end of the bottom case 411 is hinged to the lower end of the main ventilation chamber 1.
The housing 412 is a cylindrical shell, and the upper and lower ends thereof are open, wherein an annular flange II4121 is arranged in the opening at the lower end.
The housing 412 is coaxially connected to the bottom case 411, wherein an upper end of the housing 412 is fixed to an inner wall of an annular flange I4111 of the bottom case 411.
The cyclone air outlet 44 is a hollow cylinder. The cyclone air outlet 44 is arranged on the inner wall of the circular flange II4121 of the shell 412.
The cyclone air outlet 44 is communicated with the lower end of the cyclone generator cavity shell 21 and sealed by a sealing ring.
The first-stage annularly-arranged directional tapered nozzle group 42 includes a plurality of directional tapered nozzles I421, and in the present embodiment, the number of the directional tapered nozzles I421 is eight.
Eight directional reducing nozzles I421 are uniformly distributed on the circular ring flange I4111 in the circumference, the circular ring flange I4111 is spread in an elevation angle shape on the surface, and each directional reducing nozzle I421 is communicated with the inside of the bottom shell 411.
The two-stage annularly arranged directional tapered nozzle group 43 includes a plurality of directional tapered nozzles II431, and in the present embodiment, the number of directional tapered nozzles II431 is eight.
Eight directional reducing nozzles II431 are evenly distributed on the circumference of the circular ring flange II4121, the surfaces of the circular ring flange II4121 are spread in an elevation mode, and each directional reducing nozzle II431 is communicated with the inner part of the shell 412.
Referring to fig. 8, the top surface of the annular flange I4111 is denoted as an H-surface. The top surface of the annular flange II4121 is denoted as L-face.
Each of the directional tapered nozzles I421 is grouped with its nearest two directional tapered nozzles II 431. And (3) marking the intersection point of the axis of the directional tapered nozzle I421 and the plane H as an intersection point I, and marking the intersection points of the axes of two adjacent directional tapered nozzles II431 and the plane L as an intersection point II and an intersection point III respectively. And recording a perpendicular bisector of a connecting line between the intersection point II and the intersection point III as a perpendicular line I, and recording the projection of the perpendicular line I on the H surface as a perpendicular line II. The perpendicular line II passes through the intersection point I.
When air conditioning air blows from the air inlet of the main ventilation cavity 1, the air conditioning air is divided into two parts. And a part of wind is rectified by the annular rectifying honeycomb plate 3, and the rectified wind enters the directional tapered spray pipe I421 of the first-stage annular arrangement directional tapered spray pipe group 42 and the directional tapered spray pipe II431 of the second-stage annular arrangement directional tapered spray pipe group 43 to be sent out in a directional mode, so that stronger directional propagation is realized, the airflow propagation is farther, and the higher propagation accuracy is achieved. The other part of the wind passes through the cyclone generator cavity shell 21, the direct current motor 23 rotates to drive the spiral rotating body 24 to rotate, and the generated rotating wind is sent out from the cyclone air outlet 44.
And a temperature sensor is arranged outside the three-stage multidirectional double-form air supply plate block 4.
The directional tapered nozzle I421 and the directional tapered nozzle II431 are both provided with a switch 5, and the switch 5 in the embodiment is a sheet type nozzle opening and closing device. The sheet type nozzle opening and closing device is connected with an automatic control system. The temperature sensor outputs a temperature signal to the automatic control system, and the automatic control system receives the signal and then outputs a control instruction to automatically control and change the contact area between the sheet type nozzle opening and closing device and the pipe orifice so as to complete the regulation of the air output, thereby realizing three air supply modes: a full space mode, a personalized mode and a regional air supply mode.
Full space mode: when this mode is selected, the sheet-type nozzle opening/closing device is fully opened, and all the air supply ports collectively supply air, thereby achieving full-space coverage.
The personalized mode comprises the following steps: according to the requirements of indoor personnel, the opening and closing of the air supply outlet are controlled by the sheet type nozzle opening and closing device, and directional air supply is carried out on the required space.
And (3) regional air supply mode: the first-stage annular arrangement directional tapered nozzle group 42 and the second-stage annular arrangement directional tapered nozzle group 43 are equally divided into eight plates according to 45 degrees, and air can be supplied to the space according to the requirement of the indoor space.
It should be noted that the personalized mode is different from the regional air supply mode in that the personalized mode can track the trace of the person by setting the temperature sensor supported by the infrared sensing technology when the person walks indoors, so as to change the opening and closing of the air outlet, while the regional air supply mode can only supply air to the directional space.
Preferably, sealing rings are arranged at the connection part of the directional reducing nozzle I421 and the annular flange I4111 and the connection part of the directional reducing nozzle II431 and the annular flange II4121, and the main purpose is to prevent air leakage of the device in the actual operation process.
Preferably, the dc motor 23 controls the on/off driving of the electromagnetic relay through the single chip microcomputer.
Example 2:
the main structure of this embodiment is the same as that of embodiment 1, and further description is made on specific data and related formula calculation of the three-level multi-directional dual-mode air supply panel block 4.
The resulting flow of gas ejected outwardly from the orifice, nozzle or slit is called a gas jet. Because the jet flow is of a turbulent flow type, mass and momentum exchange is continuously generated between the jet flow and surrounding media due to the transverse pulsation of the turbulent flow, the surrounding media are driven to flow, the mass flow of the jet flow and the cross-sectional area of the jet flow are continuously increased along the direction, and a cone-shaped flow field spreading to the periphery is formed.
The radius of the jet flow section with the circular section is set as R which is in direct proportion to the distance from the pole,
r ═ kx (formula one).
From the knowledge of the jet
It is known that the nozzle with a constriction has a turbulence factor a of 0.071 and a diffusion angle 2 α of 27 ° 10 ', and the axial fan with air deflector has a turbulence factor a of 0.12 and a diffusion angle 2 α of 44 ° 30'. and a value is determined, the outer boundary line of the jet flow boundary layer is determined, and the jet flow moves forwards according to a certain diffusion angle. By applying the characteristic, the change rule of the radius of the jet flow along the range is obtained for the jet flow with the circular section, and the method comprises the following steps:
according to the measurement results of albolamevic:
the formula of the semi-experience is as follows:
combining the above formula to obtain:
in formulas I to VII, X is the distance from the cross section to the pole, k is an experimental coefficient, α is a diffusion angle, a is a turbulence coefficient and represents a characteristic coefficient of a jet flow structure, and r is0Is the radius of the air outlet, s is the axial distance from the air outlet to the fixed point,
for dimensionless distance from the extreme point, y is the distance from any point on the cross section to the axis, R is the radius of the jet flow on the cross section, V is the velocity at the point y, V is0As the core velocity, vm is the cross-sectional axial velocity.
It should be noted that two models are discussed in this embodiment, and the energy-saving lateral comparison is performed on the two models in two different air outlet working states.
Constructing a first model under the same conditions, and assuming that the wind demand is 1m in area2And a radius R1 of 0.56 m. Referring to fig. 11, a three-dimensional rectangular coordinate system is established, and origin (0,0,0) coordinates are determined as shown.
And setting the center coordinate of the circular area S needing wind as P (0.0m, 1.8m and 3.0 m).
The center coordinate of the air outlet is set as M (5.4M, 1.8M, 3.0M).
1) See FIG. 13, radius r0With a nozzle with a constriction (turbulence factor a of 0.071 and a divergence angle of 2 α of 27 ° 10').
Therefore:
in the formula VIII to the formula VII, QvThe area of the wind-required place is 1m2Flow rate of the circular region S, Qv0Is a radius r0Flow of the nozzle outlet with a constriction, d0The diameter of the air outlet is the same as the diameter of the air outlet,
is the distance from point P to point M, a1Is a radius r0The nozzle with the contraction opening has the turbulence coefficient of the air outlet.
2) See FIG. 12, radius 4r0The axial flow fan with the air deflector blows air directly (the turbulence coefficient a is 0.12, and the diffusion angle 2 α is 44 degrees and 30').
The diffusion angle is approximately 22.5 degrees, and the geometric knowledge shows that R is 2.24m according to the formula eight,
therefore:
when Q'v0＝Qv0，
In formulas twelve to fifteen, a2Is provided withTurbulence factor, Q 'of an axial fan of a wind deflector'vThe area of the wind-requiring part is 1m2Flow rate of the circular region S of (2), Q'v0Has a radius of 4r0With baffles, Q, the outlet flow of the axial-flow fanvGas flow, Q, of the circular area S requiring wind for the directional supply of air to a single nozzlev0The gas flow of the circular area S needing wind when the single spray pipe is supplied with wind in a directional way is QvThe air flow at the air outlet is measured.
The measurement and estimation of the household air-conditioning air outlet is 70cm x 8cm, the equal area is simplified into a circular area, and the radius r of the circular area is 13cm, namely d0＝0.26m。
Therefore:
according to the data, the area of the wind demand position is ensured to be 1m2Has a radius of 4r compared with the circular area S under the condition that the flow rate of the circular area S is equal0The axial-flow type ventilator with the air deflector blows air directly and adopts the radius r0The nozzle with the contraction opening can directionally blow air and save energy by 72.67 percent.
Constructing a second model under the same conditions, and assuming that four wind-requiring places have an area of 1m2And a radius R1 of 0.56 m. Referring to fig. 11, 15 and 16, a three-dimensional rectangular coordinate system is established, and origin (0,0,0) coordinates are determined as shown.
The coordinates of the circle centers of the four circular areas S needing wind are respectively set as: a1(0.6m, 0.3m, 2.0m), A2(0.6m, 2.2m, 1.0m), A3(4.1m, 0.3m, 2.0m), A4(4.1m, 2.2m, 1.0 m).
The coordinates of the circle center of the air outlet are set to be (5.4m, 1.8m and 3.0 m).
1) Four radii of r0With a nozzle with a constriction (turbulence factor a of 0.071 and a divergence angle of 2 α of 27 ° 10').
Therefore, the sum of the air volume at the outlets of the four spray pipes is as follows:
in the formulas sixteen to seventeen,
the areas of A, B, C and D are 1m2The distance from the center of the circle (A1, A2, A3, A4) of the circular area S to the air outlet, QvThe area of the wind-requiring part is 1m2Flow rate of the circular region S, Qv0A，Qv0B，Qv0C，Qv0DRespectively has four areas of 1m2Flow rate of the circular region S, Qv0 TotalIs a radius r0The nozzle with the contraction port has the total flow of the air outlet.
2) Radius of 4r0The axial flow fan with the air deflector blows air directly (the turbulence coefficient a is 0.12, and the diffusion angle 2 α is 44 degrees and 30').
The angle analysis shows that the four circular areas can not completely cover in the directional air outlet state, but can supply air simultaneously in the A, B area and supply air simultaneously in the C, D area. Therefore, an approximation process is performed.
The A, B area was analyzed, see front view 15, taking distance of midpoint O (0.65m, 1.25m, 1.5m) of A, B circle area, MO and AB
Therefore, the section of the M part sent to the part meeting the requirements of A and B areas simultaneously is S, and the diameter of S is Ds＝AB+0.56*2＝3.26m。
The flow rate of A, B areas is all satisfied to reach the requirement QvWhen the air outlet flow is
Analysis C, D area, see front view 16, CD distance
The central point N (4.1M, 1.25M, 1.5M) of the C, D circular region is taken, so that M is sent to the position meeting C, the section of the wind-required position of D region is P, the diameter of P and the distance of MN are
DP＝CD+0.56*2＝3.27m，
To obtain
So that the jet does not hit C, D within a two-point radius of 0.56m, a separate calculation was made for C, D,
and C, point:
and D, point:
formula nineteen to formula twenty, QABIs the sum of the flow of the two wind-requiring positions A and B, QC,QDAt the place where wind is needed for C, DFlow rate of (Q)1Has a radius of 4r0The air outlet flow of the axial flow fan with the air deflector,
the distance from the point o to the point M,
the distance from the point C to the point M,
is the distance from point D to point M.
To sum up, in the whole calculation process of the second model, the flow at the air outlet of the four spray pipes is as follows: known as d00.065m is
Radius of 4r0The flow rate at the air outlet position of the axial flow type ventilator with the air guide plate is as follows: d 'is known'00.26m is
According to the data, the area of 4 wind-requiring positions is ensured to be 1m2Has a radius of 4r compared with the circular area S under the condition that the flow rate of the circular area S is equal0The axial-flow type ventilator with the air deflector blows air directly and adopts the radius r0The energy is saved by 8.67 percent by the directional air supply of the nozzle with the contraction opening.
In summary, the conventional blowing method cannot achieve regionalization. If only one or more areas in the room need to supply air, the traditional air conditioner can only supply air to the whole room, and the improved device can realize regional directional air supply, thereby saving the air supply volume of other areas which do not need to supply air and achieving the energy-saving effect. Taking a four-person dormitory as an example, under a four-person dormitory model, only one person is supplied with air, and the energy saving amount is 72.67% compared with the energy saving amount of the traditional air supply mode through calculation in the improved air supply mode. When four people in different positions are supplied with air, the energy saving amount of the improved air-out mode is 8.66% compared with the traditional air-supply mode through calculation.
Pushed by the unidirectional nozzle to a secondary directional convergent nozzle group, the nozzle group is arranged as shown in fig. 9. On the premise that the airflow ejected by the nozzle group can cover the room, the corresponding nozzle angle is calculated, see fig. 10 to 11.
The rotating jet is essentially characterized by rotation, which causes the jet to acquire a centrifugal force that spreads all around. Compared with the general jet flow, the diffusion angle is much larger, and the jet range is much shorter. The jet flow is much more turbulent, and if the double diffusion angle of the general jet flow is 28 degrees, the rotating jet flow can reach more than 90 degrees. This greatly facilitates momentum, heat and concentration exchange between the jet and the surrounding medium.
Empirical formula of dimensionless flow along axis by rotating jet:
in the twenty-one and twenty-two formulae, QVIs the cross-sectional flow along the longitudinal axis x of the jet, QV0Is the flow on the section of the outlet of the nozzle, x is the distance in the axial direction of the jet flow, d is the diameter of the section of the outlet of the cyclone, L0Moment of momentum, K, relative to the axis of rotation of the fluid as it enters the cyclone0The average momentum on the cross section of the cyclone outlet, omega is the rotation intensity.
The variation of the dimensionless flow of the jet along the longitudinal axis of the jet is imaged for different omega, and it can be seen from fig. 14 that the larger the value of omega, the stronger the ability of the rotating jet to entrain the surrounding medium, especially in
Within the range of the content of the compound,
the growth rate is particularly fast.
The rotary jet flow is characterized in that the problem of insufficient air supply at a short distance due to a small diffusion angle of the tapered spray pipe can be well solved. By adjusting the rotating speed of the direct current motor, the omega of the cyclone is further changed, and the flow of the rotating air can be adjusted. Compared with the common jet flow, the momentum exchange between the rotary jet flow and surrounding media, the heat exchange efficiency and the concentration exchange efficiency are greatly increased, and the effects of energy conservation and emission reduction are achieved.
Claims (7)
1. The utility model provides a directional air supply arrangement of energy-conserving air conditioner based on rotatory efflux which characterized in that: comprises a main ventilation cavity (1), a cyclone generator (2), an annular rectifying honeycomb panel (3) and a three-stage multi-directional dual-form air supply plate block (4);
the main ventilation cavity (1) is cylindrical, the upper end of the main ventilation cavity is provided with an air inlet, the air inlet is connected with an air conditioner, and the lower end of the main ventilation cavity is provided with an air outlet;
the cyclone generator (2) comprises a cyclone generator cavity shell (21), a motor support frame (22), a direct current motor (23) and a spiral rotator (24);
the cyclone generator cavity shell (21) is cylindrical; the cyclone generator cavity shell (21) is positioned in the main ventilation cavity (1), the upper end of the cyclone generator cavity shell is parallel to the upper end of the main ventilation cavity (1), and the lower end of the cyclone generator cavity shell penetrates out of the main ventilation cavity (1);
the motor support frame (22) is arranged on the inner wall of the cyclone generator cavity shell (21);
the direct current motor (23) is arranged on the motor support frame (22);
the spiral rotator (24) is mounted on an output shaft of the direct current motor (23);
the annular rectifying honeycomb plate (3) is sleeved on the cyclone generator cavity shell (21) and is positioned inside the main ventilation cavity (1);
the three-stage multidirectional double-form air supply plate (4) comprises a plate shell (41), a first-stage annularly-arranged directional tapered spray pipe group (42), a second-stage annularly-arranged directional tapered spray pipe group (43) and a cyclone air outlet (44);
the plate shell (41) comprises a bottom shell (411) and a shell (412);
the bottom shell (411) is a cylindrical shell, the upper end and the lower end of the bottom shell are both open, and a circular flange I (4111) is arranged in the opening at the lower end;
the upper end of the bottom shell (411) is arranged at the lower end of the main ventilation cavity (1);
the shell (412) is a cylindrical shell, the upper end and the lower end of the shell are both open, and an annular flange II (4121) is arranged in the opening at the lower end;
the shell (412) is coaxially connected with the bottom shell (411), wherein the upper end of the shell (412) is fixed on the inner wall of a circular flange I (4111) of the bottom shell (411);
the cyclone air outlet (44) is a hollow cylinder; the cyclone air outlet (44) is arranged on the inner wall of the circular flange II (4121) of the shell (412);
the cyclone air outlet (44) is communicated with the lower end of the cyclone generator cavity shell (21);
the first-stage annularly-arranged directional tapered nozzle group (42) comprises a plurality of directional tapered nozzles I (421);
a plurality of directional reducing spray pipes I (421) are uniformly distributed on the circular ring flange I (4111) in a circumferential manner, spread in an elevation angle shape on the surface of the circular ring flange I (4111), and each directional reducing spray pipe I (421) is communicated with the inside of the bottom shell (411);
the two-stage annularly arranged directional tapered nozzle group (43) comprises a plurality of directional tapered nozzles II (431);
a plurality of directional reducing spray pipes II (431) are uniformly distributed on the circular ring flange II (4121) in a circumferential mode, the surfaces of the circular ring flange II (4121) are spread in an elevation angle mode, and each directional reducing spray pipe II (431) is communicated with the inside of the shell (412);
when air conditioning air blows from the air inlet of the main ventilation cavity (1), the air conditioning air is divided into two parts; a part of wind is rectified by the annular rectifying honeycomb plate (3), and the rectified wind enters the first-stage annular arrangement directional tapered spray pipe group (42) and the second-stage annular arrangement directional tapered spray pipe group (43) and is finally sent out from the directional tapered spray pipe I (421) and the directional tapered spray pipe II (431) in a directional mode; the other part of the wind passes through the cyclone generator cavity shell (21), the direct current motor (23) rotates to drive the spiral rotating body (24) to rotate, and the generated rotating wind is sent out from the cyclone air outlet (44).
2. The directional air supply device of the energy-saving air conditioner based on the rotary jet flow as claimed in claim 1, characterized in that: the main ventilation cavity (1) comprises a main ventilation cavity left shell (11) and a main ventilation cavity right shell (12);
the main ventilation cavity (1) is formed by splicing a main ventilation cavity left shell (11) and a main ventilation cavity right shell (12).
3. The directional air supply device of the energy-saving air conditioner based on the rotary jet flow as claimed in claim 1, characterized in that: sealing rings are arranged at the connection position of the directional reducing nozzle I (421) and the annular flange I (4111) and the connection position of the directional reducing nozzle II (431) and the annular flange II (4121).
4. The directional air supply device of the energy-saving air conditioner based on the rotary jet flow as claimed in claim 1, characterized in that: a temperature sensor is arranged outside the three-stage multidirectional dual-form air supply plate block (4);
the directional tapered spray pipe I (421) and the directional tapered spray pipe II (431) are both provided with a switch (5); the switch (5) is connected with an automatic control system; the temperature sensor outputs a temperature signal to the automatic control system, and the automatic control system changes the contact area between the switch (5) and the pipe orifice through automatic control so as to complete the adjustment of the air output.
5. The directional air supply device of the energy-saving air conditioner based on the rotary jet flow as claimed in claim 4, wherein: the switch (5) is a sheet type nozzle opening and closing device.
6. The directional air supply device of the energy-saving air conditioner based on the rotary jet flow as claimed in claim 1, characterized in that: recording the top surface of the circular ring flange I (4111) as an H surface; the top surface of the circular ring flange II (4121) is marked as an L surface;
grouping each directional convergent nozzle I (421) with its nearest two directional convergent nozzles II (431); recording the intersection point of the axis of the directional tapered nozzle I (421) and the plane H as an intersection point I, and recording the intersection points of the axes of two adjacent directional tapered nozzles II (431) and the plane L as an intersection point II and an intersection point III respectively; recording a perpendicular bisector of a connecting line between the intersection point II and the intersection point III as a perpendicular line I, and recording the projection of the perpendicular line I on the H surface as a perpendicular line II; the perpendicular line II passes through the intersection point I.
7. The directional air supply device of the energy-saving air conditioner based on the rotary jet flow as claimed in claim 1, characterized in that: the direct current motor (23) controls the switch drive of the electromagnetic relay through the singlechip.
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| CN113465091A (en) * | 2021-08-06 | 2021-10-01 | 西安建筑科技大学 | Columnar cyclone type humidifying and oxygen increasing device in low-pressure environment |
| CN114303923B (en) * | 2022-01-06 | 2022-12-09 | 福建省中科生物股份有限公司 | Slot jet flow heat dissipation device for plant factory and matched cultivation frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2147460Y (en) * | 1992-11-24 | 1993-11-24 | 山东建筑工程学院 | Adjustable composite flow wind distributor |
| CN109489230A (en) * | 2018-11-12 | 2019-03-19 | 武城县冠智信息产业技术有限公司 | A kind of air diffuser of staggeredly wall rotation |
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|---|---|---|---|---|
| CN2092057U (en) * | 1991-03-13 | 1992-01-01 | 西安冶金建筑学院 | Cyclone plenum outlet with inner guide |
| CN2222877Y (en) * | 1995-08-04 | 1996-03-20 | 明盈塑胶钢模有限公司 | Stepless cyclone diffusion air outlet device with light steel frame |
| DE102009026768A1 (en) * | 2009-06-05 | 2010-12-16 | Caverion Gmbh | Air passage i.e. swivel jet outlet, for use in large area e.g. factory building, has core pipe that is rotatable around horizontal rotation axis, which runs perpendicular to longitudinal axis of housing |
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| CN109869886A (en) | 2019-06-11 |
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