CN117760007A - Layered air conditioning system and method for large-span high-large space - Google Patents
Layered air conditioning system and method for large-span high-large space Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 230000001154 acute effect Effects 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 17
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 3
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Abstract
The invention discloses a layered air conditioning system and a layered air conditioning method for a large-span high-large space. The method comprises the steps of arranging an air conditioner air supply pipe with adjustable height on a first side edge and a second side edge which are opposite to each other in a large-span high-large space, and arranging an air supply nozzle angle of the air conditioner air supply pipe to be adjustable; and adjusting the installation height, the air supply nozzle angle and the nozzle outlet speed of the air conditioner air supply pipe according to the load and the design air quantity of the large-span high-large space. The invention is not limited by regions, can be suitable for cooling in summer or heating in winter in large-span and high-size space in cold and severe cold regions, and solves the problems of air conditioning and heating in winter in high-size air conditioner in cold and severe cold regions.
Description
Technical Field
The invention relates to the field of ventilation and air conditioning, in particular to a lifting layered air conditioning system and method for a large-span and high-size space in cold and severe cold areas.
Background
With the development of urban economy, tall space buildings gradually become landmark buildings of cities with their tall space functions and unique building shapes. Such as airport, port, transportation hub, exhibition center, etc., the building is characterized by high space, large span, and the high space has its unique thermal physical characteristics, i.e. chimney effect, which easily causes the building indoor space to form a large vertical temperature gradient vertically, heat is concentrated toward the ceiling to gather, and the personnel activity area near the ground is colder. Meanwhile, the outer facade is mostly curtain walls and glass outer doors and windows, the heat loss of the enclosure structure in winter is large, cold air permeation is large, and a large space Zhou Bianleng and a relatively hot horizontal temperature gradient in a central zone area are easy to form. Because of the existence of the 'double temperature gradient' of the tall space building, as shown in figure 1, the double temperature gradient is formed by different areas of the tall space, wherein the temperature of each area in the tall space has t e <t m <t h Is characterized by (1). It can be seen that winter air conditioning and heating of high and large spaces in cold and severe cold areas have been a difficulty in the field of heating and ventilation design.
In order to save energy, the whole space is not required to reach the design temperature, but only the personnel active area close to the ground is required to reach the design temperature, and the layered air conditioning system is an effective measure for solving the problem of the air conditioner in the large space. The layered air conditioning system utilizes reasonable airflow organization to perform air conditioning treatment only on the personnel activity area at the lower part of a high-volume space of a building, and does not perform air conditioning treatment on the non-working area at the upper part, a high-speed nozzle is arranged at the middle part of the high-volume space, and a jet layer formed by air supply is used as a boundary layer between the air conditioning area and the non-air conditioning area. Compared with the air conditioning systems of other whole spaces, the layered air conditioning system can save 20-40% of energy consumption.
For a large space in a cold or severe cold region, the cooling in summer is easy to realize, and the air conditioning and the heat supply in winter are difficult. For the layered air conditioner, when cooling is performed in summer, cold air sinks and can gradually reach a personnel activity area near the ground, so that the temperature of the personnel activity area can meet the design requirement. When heating in winter, hot air is easy to rise, and even if the air supply angle of the nozzle of the layered air conditioner is adjusted, the heating effect of a large-span high-large space is difficult to ensure.
The Chinese patent with the publication number of CN103277857B applies the concept of a layered air conditioner, but is only applicable to the cold supply working condition, and the patent provides an energy-saving method of a layered air conditioning system for serving a high and large space of a railway passenger station, wherein a nozzle and an air return opening are arranged in an air conditioning area; the non-air-conditioning area is provided with an air inlet and an air outlet, the air inlet is used for cooling in the air conditioning season, and the air outlet is used for ventilation in the non-air conditioning season, so that energy conservation is realized. The Chinese patent application with the bulletin number of CN1099118A uses a layered air conditioner as a large circulation and uses a self-cleaner as a small circulation to generate a method of local space, small ventilation times and side delivery turbulence, thereby achieving the effect of purifying an air conditioning system of a large space. However, the above patent is only applicable to summer cooling conditions, and cooling in a large space is easier to realize. The cooling design of the air conditioner in summer is simpler no matter the high and large space of any region. However, for large-span and high-size spaces in cold and severe cold areas, besides the air conditioning in summer, the design of the air conditioning in winter and the heat supply is a difficult point to be solved by the technology in the field.
Disclosure of Invention
The invention aims to provide a layered air conditioning system and a layered air conditioning method for a large-span and high-large space, wherein an air supply pipe of an air conditioner can be lifted, the layered air conditioning system is not limited by regions, can be suitable for cooling in summer or heating in winter of the large-span and high-large space in cold and severe cold regions, and solves the problems of air conditioning and heating in winter of the high-large air conditioner in the cold and severe cold regions.
In order to achieve the above object, the layered air conditioning system for a large-span and high-capacity space of the present invention includes a first side and a second side that are disposed opposite to each other, and an air conditioning blast pipe that blows opposite to each other is disposed on the first side and the second side, and further includes a lifting mechanism that drives the air conditioning blast pipe to move up and down synchronously on the first side and the second side, wherein the air conditioning blast pipe has a first installation height in a cooling mode and a second installation height in a heating mode, and the second installation height is higher than the first installation height.
In an embodiment of the above layered air conditioning system for a large-span and high-capacity space, the air-conditioning air supply duct includes an air supply nozzle, and the air supply nozzle has an angle adjusting mechanism.
In an embodiment of the above layered air conditioning system for a large-span and large space, the air supply nozzle has an upward-inclined air supply nozzle angle in the cooling mode, and the air supply nozzle has a downward-inclined air supply nozzle angle in the heating mode.
In an embodiment of the above layered air conditioning system for a large-span and high-capacity space, the air-conditioning air supply duct includes an upper layer air supply duct and a lower layer air supply duct that are disposed up and down.
In an embodiment of the above layered air conditioning system for a large-span and high-capacity space, in the cooling mode, an acute angle between an axis of the air supply nozzle of the upper layer air supply pipe and a horizontal line is smaller than an acute angle between an axis of the air supply nozzle of the lower layer air supply pipe and the horizontal line; in the heating mode, the acute angle between the axis of the air supply nozzle of the upper layer air supply pipe and the horizontal line is larger than the acute angle between the axis of the air supply nozzle of the lower layer air supply pipe and the horizontal line.
In an embodiment of the above layered air conditioning system for a large span and a large space, the system further includes a floor-standing fan coil, and the floor-standing fan coil is disposed on the floor near the first side/the second side.
In an embodiment of the above layered air conditioning system for a large span and a large space, the top of the floor-type fan coil is lower than the bottom of the lower air supply duct.
In an embodiment of the above layered air conditioning system for a large-span and high-capacity space, the layered air conditioning system further includes a bearing frame vertically arranged and connected to the first side edge and the second side edge, the air conditioning air supply pipe is connected to the first side edge and the second side edge through the bearing frame respectively, and the bearing frame is provided with a clamping mechanism.
In an embodiment of the above layered air conditioning system for a large-span high space, the layered air conditioning system further includes an air return port, the large-span high space further includes a third side different from the first side and the second side, the air return port is disposed on the third side, and the height of the air return port is lower than the height of the air supply pipe of the air conditioner.
In an embodiment of the above layered air conditioning system for a large-span and high-capacity space, the layered air conditioning system further includes a decorative cover covering the outside of the air-conditioning air supply pipe.
The layered air conditioning method for the large-span high-large space comprises the following steps of:
s100, arranging air conditioner air supply pipes with adjustable heights on a first side and a second side which are opposite in large-span high-large space, and arranging air supply nozzles of the air conditioner air supply pipes with adjustable angles;
s200, adjusting the installation height, the air supply nozzle angle and the nozzle outlet speed of the air conditioner air supply pipe according to the load and the design air quantity of the large-span high-large space.
In an embodiment of the above-mentioned layered air conditioning method for a large-span and large-space, in the cooling mode, the air-conditioning air supply duct has a first installation height, and in the heating mode, the air-conditioning air supply duct has a second installation height, wherein the second installation height is set to be higher than the first installation height.
In an embodiment of the above layered air conditioning method for a large-span and large space, in the cooling mode, the air supply nozzle of the air supply duct of the air conditioner is disposed obliquely downward, and in the heating mode, the air supply nozzle of the air supply duct of the air conditioner is disposed obliquely upward.
In one embodiment of the above-mentioned layered air conditioning method for large-span and high-capacity space, in the step S100, two groups of air conditioning air supply pipes are arranged on the bottom.
In one embodiment of the above layered air conditioning method for a large-span and large space, in the refrigeration mode, an acute angle between an axis of an air supply nozzle of an air supply pipe of the upper layer air conditioner and a horizontal line is smaller than an acute angle between an axis of an air supply nozzle of an air supply pipe of the lower layer air supply pipe and the horizontal line; in the heating mode, the acute angle between the axis of the air supply of the lower air conditioner air supply pipe and the horizontal line is larger than the acute angle between the axis of the air supply nozzle of the lower air conditioner air supply pipe and the horizontal line.
The layered air conditioning system and the method for the large-span high-large space have the beneficial effects that the height of the air supply outlet is adjustable, the installation height in the refrigerating mode in summer is higher than that in the heating mode in winter, the full coverage of the large-span high-large space planar area is met, the interface height of the layered air conditioner can be adjusted timely, the refrigerating and heating requirements of the personnel active area are met, and the purpose of energy conservation is achieved.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
FIG. 1 is a schematic diagram of a dual temperature gradient formed in different regions of a tall space;
FIG. 2 is a cross-sectional airflow pattern for cooling a layered air conditioning system (summer) for large spans and large spaces in accordance with the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a cross-sectional airflow pattern for heating a layered air conditioning system (winter) for large-span and large-space according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4;
FIG. 6 is a plan airflow pattern for a layered air conditioning system of the present invention operating over a large span and large space;
FIG. 7 is a schematic diagram of a multi-strand parallel non-isothermal jet air supply;
FIG. 8 is a velocity field diagram of a superposition of multiple blow ports;
FIG. 9 is a diagram of a blow nozzle versus blow flow calculation model;
FIG. 10 is a diagram of a blow nozzle-to-blow flow calculation model of the present invention;
FIG. 11 is a diagram of a layered air conditioner interface expansion and energy consumption wasting airflow organization when a winter heating mode is adopted in a summer cooling mode and a height Hw is set;
FIG. 12 is a diagram showing the organization of insufficient air flow of an air conditioner when a winter heating mode is used to install a height Hs in a summer cooling mode;
fig. 13 is an airflow pattern diagram of a time-space floating state in a winter heating mode in which a summer cooling mode is used to install a height Hs.
Wherein reference numerals are used to refer to
100: air conditioner blast pipe
200: lifting mechanism
110. 110A, 110B: air supply nozzle
100A: upper layer blast pipe
100B: lower layer blast pipe
300: floor type fan coil
400: bearing frame
500: air return port
600: decorative cover
101: lifting frame rod
102: supporting frame
10: first side edge
20: second side edge
30: third side edge
Hs: first mounting height
Hw: second mounting height
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, so as to further understand the purpose, the scheme and the effects of the present invention, but not to limit the scope of the appended claims.
For a layered air conditioner, the mounting height, the mounting interval, the outlet wind speed and the range of the nozzles and the air flow organization directly influence the success and failure of an air conditioning system and the quality of the effect. The return air inlet and the air supply nozzle of the layered air conditioner in the prior art are positioned on the same side, the position of the air supply inlet is fixed, and certain limiting conditions are provided for the applicability of a large space. The layered air conditioning system for the large-span and high-space adopts the height-adjustable air supply opening, and the height of the air supply opening is adjusted based on the refrigerating and heating requirements, so that the adaptability of the layered air conditioning system is improved, and the layered air conditioning system has the energy-saving effect.
The long-side enclosure structure opposite-blowing layered air conditioner is adopted in the invention, as shown in fig. 2 to 6, a large-span tall space comprises a first side 10 and a second side 20 which are oppositely arranged, and the layered air conditioning system for the large-span tall space comprises opposite-blowing air conditioner blast pipes 100 arranged on the first side 10 and the second side 20, wherein the air conditioner blast pipes 100 are respectively arranged in an extending manner along the length direction of the first side 10 and the second side 20 (as shown in fig. 6). The layered air conditioning system for a large span and a large space of the present invention further includes a lifting mechanism 200, and the lifting mechanism 200 drives the air conditioning blast pipe 100 to move up and down synchronously on the first side 10 and the second side 20. The air-conditioning blast pipe 100 has a first installation height Hs in the cooling mode and a second installation height Hw in the heating mode, the second installation height Hw being higher than the first installation height Hs.
The height of the air supply opening of the layered air conditioning system is adjustable, the first installation height Hs of the air conditioning air supply pipe 100 in a refrigerating mode in summer is lower than the second installation height Hw in a heating mode in winter, the full coverage of a large-span high-large space plane area is met, the interface height of the layered air conditioner can be adjusted timely, the refrigerating and heating requirements of a personnel activity area are met, and the energy-saving effect is achieved. The layered air conditioning system is not limited by regions, can be suitable for cooling in summer or heating in winter in large-span and high-size space in cold and severe cold regions, and solves the problems of air conditioning and heating in winter in high-size air conditioner in cold and severe cold regions.
In one embodiment, lifters (e.g., composed of a motor, a gear set, etc.) are disposed at both ends of the first side 10 and the second side 20 of the large span and large space, and are connected by a lifter bar 101 (shown in fig. 3 and 5) to form an integral lifter mechanism 200. The lifters at the two ends synchronously start, stop and lift to drive the lifting frame rod 101 to ascend or descend so as to drive the air conditioner blast pipe 100 and the supporting frame 102 thereof to ascend or descend integrally, and then the air conditioner nozzle of the air conditioner blast pipe 100 is ascended or descended.
The air-conditioning air-supply duct 100 disposed opposite to each other has the same structure, and will be described below by taking the air-conditioning air-supply duct on the first side 10 as an example.
The air conditioner air supply duct 100 includes air supply nozzles 110, as shown in fig. 6, the air supply nozzles 110 are uniformly distributed along the length direction of the first side 10 and the second side 20. The air blow hole 110 has an angle adjustment mechanism, and the air blow hole 110 can adjust the angle of the air blow hole 110 by the angle adjustment mechanism, for example, the air blow hole 110 is oriented obliquely upward or obliquely downward. The air supply nozzles 110 of the air conditioner air supply pipes 100 on the first side 10 and the second side 20 are symmetrically arranged, so that the air supply nozzles 110 of the air conditioner air supply pipes 100 on both sides spray air flow to the middle part of the large-span and high-size space.
In the cooling mode in summer, the air supply nozzle 110 has an upward-inclined air supply nozzle angle, and in the heating mode in winter, the air supply nozzle 110 has a downward-inclined air supply nozzle angle.
If the depth of the tall space is too large, for example, more than 40m, it is considered that the air supply nozzles 110 are layered in height, and the higher nozzle is used to supply air to the working area R1 that is farther away, and the lower nozzle is used to supply air to the working area R1 that is closer to, that is, the double layered air conditioning system.
Specifically, in an embodiment of the present invention, the air-conditioning air supply duct 100 includes an upper air supply duct 100A and a lower air supply duct 100B disposed up and down, the air supply nozzle 100A of the upper air supply duct 100A is configured to supply air to the working area R1 that is farther away, and the air supply nozzle 100B of the lower air supply duct 100B is configured to supply air to the working area R1 that is closer to.
As shown in fig. 2 and 3, in the cooling mode in summer, the axis of the air supply port 110A of the upper air supply duct 100A forms an acute angle α1 with the horizontal line, the axis of the air supply port 110B of the lower air supply duct 100B forms an acute angle α2 with the horizontal line, the angles α1 and α2 are both angles in the oblique direction, and the angle α1 is larger than the angle α2, so that the air flow ejected from the air supply port 100A of the upper air supply duct 100A reaches a position far from the air supply port, and the air flow ejected from the air supply port 100B of the lower air supply duct 100B reaches a position near from the air supply port.
As shown in fig. 4 and 5, in the heating mode in winter, the axis of the air supply port 110A of the upper air supply duct 100A forms an acute angle α3 with the horizontal line, the axis of the air supply port 110B of the lower air supply duct 100B forms an acute angle α4 with the horizontal line, the angles α3 and α4 are both inclined downward angles, and the angle α3 is smaller than the angle α4, so that the air flow ejected from the air supply port 100A of the upper air supply duct 100A reaches a position far from the air supply port, and the air flow ejected from the air supply port 100B of the lower air supply duct 100B reaches a position near from the air supply port.
As shown in fig. 3 and 5, D is the installation space of the double-layered air conditioner, that is, the installation space of the upper air supply duct 100A and the lower air supply duct 100B, and the unit is m; hs is the installation height of the lower layer blast pipe 100B in the summer refrigeration mode, and the unit is m; hw is the installation height of the lower layer blast pipe 100B in m in the winter heating mode.
The horizontal range of the layered air conditioner is related to the mounting height of the nozzle and the air supply angle of the nozzle.
As shown in fig. 2 and 4, the layered air conditioning system for large span and large space of the present invention further includes a floor-standing fan coil 300, the floor-standing fan coil 300 being disposed on the floor near the first side 10/the second side 20. Wherein the top of the floor fan coil 300 is lower than the bottom of the lower tier air supply line 100. The invention provides the exposed floor type fan coil 300 at the position close to the peripheral protection structure, which plays the roles of solving the horizontal temperature gradient and preventing freezing.
In the present invention, the upper layer air supply pipe 100A, the lower layer air supply pipe 100B and the floor type fan coil 300 are respectively responsible for air conditioning in different working areas R1, for example, the upper layer air supply pipe 100A of the double-layer layered air conditioner is responsible for an offshore 2-2.5M (M represents modulus) range, the lower layer air supply pipe 100B air conditioner is responsible for an offshore 1.5-2M range, and the surface mounted floor type fan coil 300 is responsible for an offshore 0.5-1M range.
Further, the layered air conditioning system for large span and high space of the present invention further comprises a vertically arranged bearing frame 400 connected to the first side 10 and the second side 20, the air conditioning air supply pipe 100 is connected to the first side 10 and the second side 20 through the bearing frame 400, the bearing frame 400 is provided with a clamping mechanism, and when the lifting mechanism 200 drives the air conditioning air supply pipe 100 to lift to a set position, the supporting frame 102 for supporting the air conditioning air supply pipe 100 can be clamped on the bearing frame 400 through the clamping mechanism, which is more stable.
Referring to fig. 6, the layered air conditioning system for a large-span and high-capacity space according to the present invention further includes an air return 500, the large-span and high-capacity space further includes a third side 30 different from the first side 10 and the second side 20, the air return 500 is disposed on the third side 500, the air return 500 has a lower height than the air supply duct 100 of the air conditioner, for example, the large-span and high-capacity space is a rectangular enclosure structure, and the first side 10 and the second side 20 are long side portions, and the third side 30 is a short side portion. In the present invention, the air supply nozzle 110 is arranged at the high side of the long-side enclosure; the air return port 500 is arranged at the lower part of the short side enclosure structure by adopting a single-layer shutter, and the air supply port and the air return port are not arranged at the same side.
The layered air conditioning system for a large span and a large space of the present invention further includes a decorative cover 600 covering the outside of the air conditioner blast pipe 100, which is not only beautiful but also dust-proof. It should be noted that, because the air duct connected to the air supply nozzle is liftable, when the air conditioner room or the air conditioning unit is connected, a flexible connection with enough lifting height needs to be considered.
In engineering design, the air supply nozzles 110 of the air conditioner air supply device are arranged at equal intervals in height, and the air outlet is formed by a plurality of parallel non-isothermal jet flows.
Fig. 7 is a schematic diagram of multi-strand parallel non-isothermal jet air supply, wherein the distance between adjacent air supply nozzles 110 is 2d, and the specification size and the air outlet velocity of each air supply nozzle 110 are equal. Under the assumption that the momentum of each jet in the multiple jets is equal and the momentum of each jet in the multiple jets is equal to the momentum of a single jet, the velocity distribution section of the multiple jets gradually trends to be long under the action of mutual extrusion along with the horizontal distance from the nozzle. The velocity field of superposition of a plurality of air supply nozzles is shown in fig. 8, and fig. 9 is a calculation model of air supply nozzle to air supply jet.
The multi-strand non-isothermal jet calculation system is as follows:
1) Jet trajectory equation
2) Height difference between opposite jet flow intersection point and personnel activity area
Hr＝H-(Y-Lsina) (2)
3) Single jet axis speed attenuation formula
4) Single jet flow working area speed formula
5) Single jet axis temperature attenuation formula
6) Single jet working area temperature
7) Velocity and temperature of superposition of multiple jets
The ratio of jet spacing to jet horizontal distance of the multiple jets is less than 0.12, i.e. 2d/X<At 0.12, the velocity is corrected, and the velocity of the single jet can be approximately calculated at the tail end of the jetAnd (5) calculating the times. The ratio of jet spacing to jet horizontal distance of the multiple jets is less than 0.153, i.e. 2d/X<At 0.153, the temperature is corrected, and the temperature of the jet can be approximately equal to the temperature of the single jet at the tail end of the jet>And (3) multiplying, wherein the corresponding formulas are (7) and (8).
In fig. 7-8, d is the vertical distance from the intersection point of two adjacent jet streams on the same side to the center line of the jet, and the unit is m; and 2d is the center-to-center distance between two adjacent nozzles on the same side, namely the installation distance of the nozzles, and the unit is m.
In the formulas (1) to (9), X is a range, m; y is the vertical drop at range X, in m; aro is as followsArchimedes number as feature size; vr is the speed of the intersection point of the opposite jet flow, and the unit is m/s; vm is the velocity of the end of the multi-jet flow, and the unit is m/s; v0 is the outlet speed of the nozzle, and the unit is m/s; vz is the average velocity of the working area air flow in m/s; Δtr is the difference between the intersection of the impinging air stream and the indoor temperature in degrees celsius; ΔTm is the difference between the end temperature and the indoor temperature after superposition of multiple jet streams, singlyBits are at deg.c; Δtz is the difference between the average temperature of the working area air flow and the indoor temperature in degrees celsius; delta To is the difference between the outlet temperature of the nozzle and the indoor temperature, and the unit is the temperature; d0 is the outlet diameter of the nozzle, and the unit is m; a is the installation included angle between the nozzle and the x axis; k1 is an axis speed constant, and the value is 6.0-6.5; k2 is an axis temperature constant, and the value is 5.0-5.1; ao is the area of the air supply outlet, and the unit is m 2 The method comprises the steps of carrying out a first treatment on the surface of the L is the oblique jet distance, l=x/cosa in m; hr is the height difference between the intersection point of the opposite jet flow and the personnel movement area, and the unit is m; h is the installation height of the nozzle from the personnel active area, and the unit is m.
According to the double-layer layered air conditioning system adopted by the invention, the horizontal multi-jet superposition exists in the lower-layer nozzle, the horizontal multi-jet superposition exists in the upper-layer nozzle, the intersection influence on the jet exists, and the nozzle jet calculation flow is shown in figure 10.
The operation and control of the invention are described as follows:
(1) Winter heating mode operation
In winter, hot air is ejected through the air supply nozzle 110 of the air conditioner air supply duct 100, and the hot air is gradually raised while moving horizontally due to the fact that the specific gravity is smaller than that of indoor air. Under the pulling action of the lower return air inlet 500, a part of the hot air flows back to the air conditioner main unit, and a part of the hot air rises upwards and is accumulated on the roof. Therefore, when heating in winter, the air supply nozzle 100 should be adjusted to be inclined downward, that is, the angles of α3 and α4 are all inclined downward, and α3 and α4 are all negative values.
Under the full coverage of an air conditioner in a working area R1 meeting a large-span high-space, after the winter working condition is repeatedly and iteratively calculated by a calculation system, the numerical values such as the nozzle mounting height, the nozzle mounting angle, the nozzle outlet speed and the like suitable for the winter working condition are determined, and the numerical values have a group of optimal numerical values. Wherein the airflow structure is shown in fig. 4.
A) If the nozzle mounting height is fixed, the nozzle mounting angle gradient is increased (alpha negative value is larger), and the kinetic energy is increased and the energy is increased when the nozzle speed is increased; when the nozzle speed is reduced, the overflow loss is finished when the air flow is not sent to a working area R1 far enough, and an air conditioning blind area is formed in the central area of the ground.
B) If the nozzle mounting height is fixed, the inclination of the mounting angle is reduced (alpha negative value is smaller), the overflow loss is increased, and no matter the nozzle speed is increased or reduced, the air flow is not sent to the working area R1, and the air conditioner is invalid.
C) If the nozzle installation angle is fixed, the nozzle installation height is reduced, and when the nozzle speed is unchanged or reduced, airflow tissues can not be fully covered, and an air conditioning blind area can occur in the central area of the ground. When the nozzle speed is increased, full coverage can be possibly met, and the air conditioning effect is met, but the kinetic energy and the energy are increased; or the air flow bounces and rises, so that the air cannot be fully covered, and an air conditioning blind area appears.
D) If the nozzle installation angle is fixed, the nozzle installation height is increased, and when the nozzle speed is unchanged or reduced, the air flow is not sent to the working area R1, and the air conditioner fails. The nozzle velocity must be increased to act on the working area R1, but there is an increase in kinetic energy, energy source.
From the above analysis, it can be derived from the computing system that the spout mounting height, mounting angle, spout outlet speed are interrelated and interrelated.
(2) Summer refrigeration mode operation (winter nozzle mounting height)
In summer, cold air is sprayed through the air supply nozzle 110 of the air conditioner air supply duct 100, and the cold air gradually sinks while moving horizontally due to the fact that the specific gravity is greater than that of indoor air. For summer operation, a group of optimal numerical values such as nozzle installation height, installation angle, nozzle speed and the like also exist through iterative calculation of a calculation system.
For a tall space, the installation height and the jet speed of the jet, which are determined by iterative calculation in winter, are generally used for hot and cold, if the jet angle is still adjusted, the intersection of the jet flow at a position P higher in the longitudinal coordinate occurs, so that the layered air conditioner interface is higher, the action range of the layered air conditioner is larger, and an energy consumption waste area R2 is formed by the working area R1 higher than the personnel activity, so that energy is wasted, and the situation is shown in fig. 11.
For the above case, two schemes can be adopted to solve the problem.
Scheme one: the nozzle mounting height is unchanged, the mounting height determined by iterative calculation in winter is still adopted in summer, and the wind speed is reduced while the nozzle mounting angle is adjusted.
Scheme II: the installation height of the nozzle is reduced, the installation angle of the nozzle is properly increased on the basis of the first scheme, and the wind speed can be further reduced by utilizing the range of the parabola, so that a better energy-saving effect is realized.
(3) Winter heating mode operation (summer nozzle mounting height)
On the contrary, if the optimal height value calculated by iteration in summer is adopted during winter operation, even if the air supply speed is increased, the air-conditioning-free area forming the strip-shaped blind area R3 on the large-span ground is possibly formed due to the factor of rising air flow, and the situation is as shown in fig. 12. If the angle of the nozzle is adjusted, the downward inclination angle is reduced, so that the range is farther to form the full coverage of a large span, the condition that the hot air of the air conditioner enters a working area R1 where people cannot move can possibly occur, a complete floating state is formed, and the air conditioner fails in winter. This is shown in fig. 13.
In view of the above, it is necessary to increase the spout mounting height. And meanwhile, a certain outlet speed of the nozzle is ensured, so that downward diving airflow tissues are formed, and the air can be sent far enough to reach a personnel activity area to form large-span full coverage.
In summary, in winter and summer running conditions, the double-layer layered air conditioning system with the adjustable nozzle installation height is adopted, namely, when running in winter, the installation height of the nozzle is increased through the lifting mechanism 200; in summer operation, the mounting height of the nozzle is lowered by the lifting mechanism 200. In addition, optimal numerical values (nozzle mounting height, mounting angle, nozzle outlet speed and the like) in winter and summer can be calculated in an iterative mode respectively.
In summary, the layered air conditioning method for a large-span and high-large space of the present invention comprises the steps of:
s100, arranging air conditioner air supply pipes with adjustable heights on a first side and a second side which are opposite in large-span high-large space, and arranging air supply nozzles of the air conditioner air supply pipes with adjustable angles;
s200, adjusting the installation height, the air supply nozzle angle and the nozzle outlet speed of the air conditioner air supply pipe according to the load and the design air quantity of the large-span high-large space.
The air conditioner air supply pipe is provided with a first installation height in a refrigerating mode, and is provided with a second installation height in a heating mode, wherein the second installation height is higher than the first installation height.
Wherein, in the refrigeration mode, the air supply nozzle of the air conditioner air supply pipe is obliquely downwards arranged, and in the heating mode, the air supply nozzle of the air conditioner air supply pipe is obliquely upwards arranged.
In the step S100, two groups of air-conditioning air supply pipes are arranged at the bottom.
In the refrigeration mode, the acute angle between the axis of the air supply nozzle of the upper air conditioner air supply pipe and the horizontal line is smaller than that between the axis of the air supply nozzle of the lower air conditioner air supply pipe and the horizontal line; in the heating mode, the acute angle between the axis of the air supply of the lower air conditioner air supply pipe and the horizontal line is larger than the acute angle between the axis of the air supply nozzle of the lower air conditioner air supply pipe and the horizontal line.
The invention provides an air conditioning system with adjustable nozzle height, wherein the mounting height of the nozzle is adjusted through the lifting mechanism device when the winter and summer are switched, so that the optimal nozzle setting positions in different seasons in winter and summer can be simultaneously met, and the energy-saving effect of the layered air conditioner is further realized.
The invention adopts a double-layer layered air conditioning system and side-blown nozzle air supply, the parallel nozzle air supply forms non-isothermal jet flow, and different nozzle installation heights, nozzle installation angles and nozzle outlet speed combination values are adopted in winter and summer according to a non-isothermal jet flow calculation system, so that different airflow organization states can be formed. However, under the condition that the air conditioning effect is met (full coverage with large span is formed, air flow is effectively sent into a personnel active area; the wind speed meets the design requirement), a group of optimal spout installation height, spout installation angle and spout outlet speed combination values exist. Through the analysis of a computing system, the optimal installation heights in winter and summer are different, the problems that the installation heights of air-conditioning air supply nozzles are fixed in the traditional air-conditioning air supply system, and energy waste is likely to exist under the condition that one season can not be met or two seasons are met if the same installation height is adopted in winter and summer are solved.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A layering air conditioning system for high large-span space of large-span is high, and the high large-span space of large-span is including relative first side and the second side that sets up, first side with be provided with the air conditioner blast pipe of blowing on the second side, its characterized in that still includes elevating system, elevating system drives the air conditioner blast pipe in synchronous up-and-down motion on first side and the second side, wherein, the air conditioner blast pipe has first installation height under the refrigeration mode, has the second installation height under the heating mode, the second installation height is higher than first installation height.
2. The layered air conditioning system for a large span and high space of claim 1 wherein said air conditioning supply duct includes a supply air outlet having an angle adjustment mechanism.
3. The layered air conditioning system for a large span and large space of claim 2 wherein said air delivery jets have an upward-angled air delivery jet angle in a cooling mode and an downward-angled air delivery jet angle in a heating mode.
4. The layered air conditioning system for a large span and large space according to claim 2, wherein the air conditioning blast pipe comprises an upper blast pipe and a lower blast pipe disposed one above the other.
5. The layered air conditioning system for a large-span and high-capacity space according to claim 4, wherein in the cooling mode, an acute angle of an axis of the air supply nozzle of the upper layer air supply duct with respect to a horizontal line is smaller than an acute angle of an axis of the air supply nozzle of the lower layer air supply duct with respect to the horizontal line; in the heating mode, the acute angle between the axis of the air supply nozzle of the upper layer air supply pipe and the horizontal line is larger than the acute angle between the axis of the air supply nozzle of the lower layer air supply pipe and the horizontal line.
6. The layered air conditioning system for a large span and high space of claim 4 further comprising a floor-standing fan coil disposed on the floor adjacent said first/second sides.
7. The layered air conditioning system for a large span and high space of claim 6 wherein the top of said floor fan coil is lower than the bottom of said lower tier air supply duct.
8. The layered air conditioning system for a large span and tall space according to any one of claims 1 to 7, further comprising vertically disposed load-bearing frames connected to said first side and said second side, said air conditioning blower tube being connected to said first side and said second side by means of load-bearing frames, respectively, said load-bearing frames being provided with a clamping mechanism.
9. The layered air conditioning system for a large span, high volume as recited in any one of claims 1 to 7, further comprising an air return opening, said large span, high volume further comprising a third side distinct from said first and second sides, said air return opening being disposed on said third side, said air return opening having a height that is less than a height of said air conditioning supply duct.
10. The layered air conditioning system for a large span and high space according to any of claims 1 to 7 further comprising a decorative cover that covers the outside of the air conditioning supply duct.
11. A layered air conditioning method for a large-span and high-capacity space, comprising the steps of:
s100, arranging air conditioner air supply pipes with adjustable heights on a first side and a second side which are opposite in large-span high-large space, and arranging air supply nozzles of the air conditioner air supply pipes with adjustable angles;
s200, adjusting the installation height, the air supply nozzle angle and the nozzle outlet speed of the air conditioner air supply pipe according to the load and the design air quantity of the large-span high-large space.
12. The method of claim 10, wherein in the cooling mode, the air-conditioning supply duct has a first mounting height, and in the heating mode, the air-conditioning supply duct has a second mounting height, wherein the second mounting height is set higher than the first mounting height.
13. The layered air conditioning method for large span and large space according to claim 10, wherein the air supply nozzle of the air supply duct of the air conditioner is disposed obliquely downward in the cooling mode, and the air supply nozzle of the air supply duct of the air conditioner is disposed obliquely upward in the heating mode.
14. The method according to claim 10, wherein in the step S100, the air-conditioning ducts are arranged in two groups arranged on the bottom.
15. The layered air conditioning method for a large span and large space according to claim 14, wherein in the cooling mode, an acute angle of an axis of the air supply nozzle of the upper layer air conditioning air supply duct with respect to the horizontal line is set to be smaller than an acute angle of an axis of the air supply nozzle of the lower layer air supply duct with respect to the horizontal line; in the heating mode, the acute angle between the axis of the air supply of the lower air conditioner air supply pipe and the horizontal line is larger than the acute angle between the axis of the air supply nozzle of the lower air conditioner air supply pipe and the horizontal line.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978678A (en) * | 2022-08-31 | 2023-04-18 | 广东省建筑设计研究院有限公司 | Ventilation structure based on airport in hot summer and warm winter areas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978678A (en) * | 2022-08-31 | 2023-04-18 | 广东省建筑设计研究院有限公司 | Ventilation structure based on airport in hot summer and warm winter areas |
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