CN112240634B - Variable-distance air conditioner air supply tail end capable of balancing air outlet resistance and adjusting method thereof - Google Patents
Variable-distance air conditioner air supply tail end capable of balancing air outlet resistance and adjusting method thereof Download PDFInfo
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- CN112240634B CN112240634B CN202011500591.0A CN202011500591A CN112240634B CN 112240634 B CN112240634 B CN 112240634B CN 202011500591 A CN202011500591 A CN 202011500591A CN 112240634 B CN112240634 B CN 112240634B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an air supply end of a variable-distance air conditioner capable of balancing air outlet resistance and an adjusting method thereof, which are suitable for a fixed air volume centralized air conditioning system, wherein the air supply mode is side air supply. Two regulating valves are arranged in the tail end, gate valves are adopted, and the opening degree is controlled through a motor. The regulating valve far away from the air port is used for balancing the flow resistance in the pipeline and keeping the air quantity unchanged. A section of pipeline expansion area is arranged between the valves to ensure that airflow reaches the front of the air port to form a uniform flow field. The air speed is adjusted by changing the opening degree by using the adjusting valve at the air inlet, so that the air supply distance is adjusted. The microcomputer controller calculates the opening degree of the two valves meeting the air supply distance demand according to the air supply distance demand and the air supply temperature difference detected by the sensor, and sends a control signal to the motor of the valves to realize the control of the air supply distance. The invention can carry out variable-distance air supply on the constant-air-volume air conditioning system, accurately control the temperature and the humidity of the area where the personnel are located, and realize the aim of saving energy while meeting the requirement of thermal comfort.
Description
Technical Field
The invention relates to the technical field of air outlets at the tail ends of air conditioners, in particular to a variable-distance air supply tail end of an air conditioner for balancing air outlet resistance and an adjusting method thereof, which are suitable for a constant-air-volume air conditioning system.
Background
The air supply end of the air conditioner is a device for sending the processed air into a room in a centralized air conditioning system so as to adjust the indoor temperature and humidity. Among the central air conditioning systems, the constant air volume air conditioning system is the most common type of system that is used most frequently. The air supply pressure and the air supply flow in the constant air volume central air conditioning system are not changed. According to bernoulli's theorem, the resistance of the pipe must also remain constant when the flow pressure and flow rate are constant. Therefore, the air supply resistance of a single regulating valve in the air supply end is adjusted and fixed when the air conditioning system is installed, so that the air supply amount of the air supply end meets the design requirement, and the regulating valve is not regulated in the subsequent air conditioning operation process. When the indoor air conditioning load changes, the constant air volume air conditioning system meets the requirement of the indoor air conditioning load by changing the air supply temperature. The air supply temperature of the variable air volume air conditioning system is unchanged, and the air supply volume is changed to meet the requirement of indoor air conditioning load. The variable air volume air conditioning system generally adopts a throttling type end device or a fan power type end device. The throttling type end device is usually in a form of internally arranging an electric butterfly valve, resistance is changed by adjusting the opening degree of the butterfly valve, so that the air supply quantity of the tail end is changed, when the resistance of one tail end is changed, the resistance of the whole system is changed, the air supply quantities of other tail ends are changed at the same time, and the air supply requirements of rooms where other tail ends are located cannot be met. In order to ensure that the air supply quantity of other tail ends is not influenced, the air feeder of the variable air quantity system adopts a variable frequency fan to adjust the static pressure of the system, and the static pressure in the system is adjusted by adjusting the air supply quantity of the fan, so that each tail end can meet the air supply requirement. The fan power type end device is additionally provided with a small fan on the basis of a throttling type end device, and the end fan can ensure that the room has enough air supply no matter how the air supply of other rooms changes, but the power consumption and the noise of the fan can be increased. In summary, compared with the air supply end of the variable air volume air conditioning system, the end of the constant air volume air conditioning system has almost no adjusting measure in the operation process, if the air supply speed of the end needs to be adjusted through a conventional valve, the air supply resistance of the end is changed, the air supply volume is changed, the air supply resistance of the whole system is influenced, the air supply volumes of the other ends are changed, and the air conditioning load in a room cannot be met.
Because the adjustability of the tail end of the constant air volume air conditioning system is poor, the air supply tail end of the air conditioner of the current constant air volume air conditioning system needs to send the processed air to the whole air conditioning area, so that the residual heat and the residual humidity in a room can be eliminated, and the temperature and the humidity of the whole room can meet the thermal comfort requirement. However, this air supply method generally causes the following problems:
1. because of the air supply distance of wind gap can not be adjusted, indoor personnel are less, or indoor personnel are far away from the condition of air supply outlet distance, the hot environment control to personnel place region still need to be realized just through the humiture of controlling whole room to current air supply end, and can not realize only controlling the regional humiture of indoor personnel place to cause the waste of energy.
2. The tail end of the existing air conditioner can not realize air supply at different positions by using a single air supply tail end, and if air supply at multiple positions is required to be realized, a mode of increasing air ports and extending air pipes is usually adopted, so that the construction cost is increased.
Therefore, if the tail end of the air conditioner can be designed, the air supply distance of the air inlet can be changed in real time according to the position of indoor personnel under the condition that the air supply quantity of each tail end of the constant air quantity air conditioning system is not changed, so that the temperature and humidity of the area where the indoor personnel are located can be accurately controlled, the temperature and humidity of the whole room are not controlled, and the energy-saving air conditioning system has important significance for saving energy.
Disclosure of Invention
The invention aims to provide a variable-distance air-conditioning air supply tail end for balancing air outlet resistance of a constant-air-volume centralized air-conditioning system and an adjusting method thereof aiming at the defects of the prior art, so as to solve the technical problems that the air supply position is fixed and the temperature and humidity of different areas cannot be independently controlled in the prior air-conditioning tail end technology. Compared with the existing air conditioner tail end which cannot adjust the air supply speed and the air supply distance in the current constant air volume centralized air conditioning system, the air supply tail end of the air conditioner has the advantages that the resistance of an air supply pipeline is balanced and the constant air volume control is carried out by adopting the mode of two adjusting valves and one air flow buffer area, and meanwhile, the air supply distance is changed, so that the local individualized air supply is realized, and the purpose of energy conservation is achieved.
The purpose of the invention is realized by the following technical scheme: a variable-distance air supply end of an air conditioner for balancing air outlet resistance is suitable for a centralized air conditioning and air quantity fixing system, and comprises a variable-distance air supply module and an intelligent control module;
the variable-distance air supply module comprises a resistance balance adjusting valve, an air speed control adjusting valve, an air flow buffer area and an air pipe;
the resistance balance regulating valve is arranged at an air inlet of the air pipe, and the air speed control regulating valve is arranged at an air outlet of the air pipe; an airflow buffer area is arranged between the resistance balance regulating valve and the wind speed control regulating valve, and the airflow buffer area is a section of pipeline expansion area to ensure that airflow reaches the air outlet to form a uniform flow field; when the wind speed control regulating valve regulates the wind speed, the resistance balance regulating valve is synchronously regulated to balance the resistance change caused by the regulation of the wind speed control regulating valve so as to ensure that the total resistance and the wind volume of the wind pipe are unchanged;
the air supply distance of the air conditioner is positively correlated with the air speed and the air supply temperature difference delta t, and the air supply temperature difference is the difference value between the indoor air temperature and the air supply temperature; setting a certain air supply temperature difference according to actual needs, and adjusting the air speed through an air speed control adjusting valve to realize the adjustment of the air supply distance;
the intelligent control module comprises an infrared sensor, a resistance balance regulating valve control motor, a wind speed control regulating valve control motor, a microcomputer controller, a wind outlet temperature sensor and an indoor air temperature sensor; detecting the difference value between the indoor air temperature and the air supply temperature of the air outlet through an indoor air temperature sensor and an air outlet temperature sensor, recording the difference value as an air supply temperature difference delta t, detecting the position of a person through an infrared sensor, obtaining a signal of an air supply distance, and sending the signal to a microcomputer controller; the microcomputer controller calculates two valve openness satisfying the air supply distance requirement according to the air supply distance, the air supply temperature difference delta t and the corresponding relation of the resistance balance adjusting valve and the air speed control adjusting valve openness, sends an openness control signal to the resistance balance adjusting valve control motor and the air speed control adjusting valve control motor, adjusts the openness of the resistance balance adjusting valve and the air speed control adjusting valve, and realizes control of different air supply distances.
Further, the regulation relationship between the resistance balance regulating valve and the wind speed control regulating valve is as follows:
Su(u)+Sv(v)=(P/Q2)- S0
wherein S isuThe resistance of the resistance balance regulating valve is shown, and u is the opening degree of the resistance balance regulating valve; svThe impedance of the wind speed control regulating valve is shown, and v is the opening degree of the wind speed control regulating valve; p represents the flow pressure in Pa; q represents the flow rate in m3/s；S0Representing the remaining impedances in the supply air terminal other than the impedance of the resistance balance damper and the impedance of the wind speed control damper.
Furthermore, the wind speed control regulating valve changes the wind speed by changing the area of the wind outlet; the resistance balance regulating valve is used for balancing the flow resistance which is changed due to the change of the opening degree of the air speed control regulating valve in the pipeline of the air pipe, so that the resistance in the whole air pipe is kept unchanged.
Furthermore, the resistance balance regulating valve and the wind speed control regulating valve adopt the form of a gate valve, and the valve changes the area of the ventilation section of the pipeline at the valve through the up-down translation movement; the opening ranges of the resistance balance regulating valve and the wind speed control regulating valve are from half of the cross section area of the pipeline to the total cross section area of the pipeline.
Furthermore, a pipeline expansion area is arranged between the two valves to serve as an airflow buffer area, so that an even flow field is formed before airflow reaches the air outlet; the shape of the air flow buffer area is a square with the side length being twice the width of the inlet air pipe, the outlet pipeline of the air flow buffer area is parallel to the inlet pipeline and is horizontally staggered, and the staggered distance is the width of the inlet pipeline.
Further, the air supply distance and the air supply range are adjusted by changing the angle of the air inlet and the air supply speed.
A method for adjusting the air supply tail end of a variable-distance air conditioner capable of balancing air outlet resistance comprises the following specific steps:
the method comprises the following steps: an infrared sensor and an indoor air temperature sensor are arranged in a room, an air outlet temperature sensor is arranged at an air outlet, the infrared sensor detects the position of a person, the air outlet temperature sensor detects the air supply temperature of an air pipe, and the indoor air temperature sensor detects the ambient temperature in the room;
step two: the information detected by the three devices is transmitted to the microcomputer controller;
step three: the microcomputer controller calculates the opening degree of a resistance balance adjusting valve and an air speed control adjusting valve required for sending air flow to the position of a person according to the air supply temperature difference delta t calculated by an indoor air temperature sensor and an air outlet temperature sensor and the position of the person detected by an infrared sensor;
step four: and C, the microcomputer controller sends control signals to the resistance balance regulating valve control motor and the wind speed control regulating valve control motor according to the opening degrees of the resistance balance regulating valve and the wind speed control regulating valve which are required for sending the air flow to the position of the person and obtained in the step three, and the opening degrees of the two valves are adjusted to ensure that the air flow is sent to the position of the person.
The invention has the beneficial effects that: according to the invention, the resistance balance regulating valve is regulated, so that the air supply resistance of the air pipe can be kept stable when the air speed control regulating valve changes the ventilation cross-sectional area of the air pipe, the air supply position is changed while the fixed air quantity is ensured, and the problem of energy waste caused by the control of the temperature and humidity of the whole room is avoided.
Drawings
FIG. 1 is a schematic view of the blowing end of the present invention;
FIG. 2 is a schematic view showing the relationship of the respective parts in the adjustment process in the embodiment;
FIG. 3 is a schematic control flow chart in the embodiment;
FIG. 4 is a diagram showing the relationship between the opening degrees of the resistance balance adjusting valve and the wind speed control adjusting valve in the embodiment;
in the figure, 1, a resistance balance adjusting valve; 2. a wind speed control regulating valve; 3. an air flow buffer zone; 4. an air duct; 5. the resistance balance regulating valve controls the motor; 6. the wind speed control regulating valve controls the motor; 7. an infrared sensor; 8. a microcomputer controller; 9. A temperature sensor at the air outlet; 10. an indoor air temperature sensor.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention provides a variable-distance air supply end of an air conditioner, which can balance air outlet resistance, wherein the horizontal section of the air supply end of the air conditioner is shown in figure 1, the opening degree of a resistance balance regulating valve 1 is u, and the opening degree of a wind speed control regulating valve 2 is v. According to fluid mechanics, in a fluid system, the following relationships exist for pressure and flow:
P=SQ2
wherein P is the flow pressure, Pa; s-impedance, kg/m7(ii) a Q-flow, m3/s。
In the present air blowing end:
P=(Su+Sv+S0)Q2
in the formula, Su-resistance balancing the impedance of the regulating valve 1; sv-windThe impedance of the speed control regulating valve 2; s0-the remaining impedance of the supply air terminal.
P, Q, S in constant air volume system0Remains unchanged, Su、SvThe following relations exist between the opening u of the resistance balance regulating valve 1 and the opening v of the wind speed control regulating valve 2:
Su= Su(u)、Sv=Sv(v)
the functional relationship between the opening u of the balance regulating valve 1 and the opening v of the wind speed control regulating valve 2 at the fixed air supply quantity can be obtained by substituting the formula:
Su(u)+Sv(v)=(P/Q2)- S0
the functional relationship can be obtained by simulation calculation or actual measurement using CFD (computational fluid dynamics) software.
According to the archimedes 'law and newton's second law, the blowing distance is related only to the blowing temperature difference Δ t (temperature difference between the indoor air temperature and the blowing air temperature) and the horizontal blowing speed. Adopting CFD (computational fluid dynamics) software to perform simulation calculation or actual measurement to obtain the relation between the air supply distance x, the opening v of the wind speed control regulating valve 2 and the air supply temperature difference delta t (the difference between the indoor environment temperature and the air supply temperature); on the basis, the functional relationship between the opening u of the balance regulating valve 1 and the opening v of the air speed control regulating valve 2 at the time of fixing the air supply quantity is combined, and the following table 1 can be obtained:
TABLE 1 corresponding relationship between valve opening, air supply temperature difference and air supply distance
X in the tablei,jRepresenting the temperature difference of the air supply as delta tiThe opening degree of the wind speed control regulating valve 2 is vjWhen the cold air falls to a position 1.5 meters away from the ground, the center of the cold air is horizontally away from the air opening. The table is used as the basis for compiling a control program according to the air supply temperature difference delta tiAnd determining the opening degree of the two valves in a relation table according to the requirement of the air supply distance x. The relationship of the components during adjustment is shown in fig. 2.
The control flow chart is as shown in the figure3, an infrared sensor 7, an air outlet temperature sensor 9 and an indoor air temperature sensor 10 are arranged at a distance x between a person and an air inlet and an air supply temperature T9And the temperature T of the indoor air10The signal of (2) is transmitted to the microcomputer controller 8, and the microcomputer controller calculates the air supply distance gear according to the following formula:
selecting the required opening v of the wind speed control regulating valve 2 in the relation table according to the j valuejAnd the opening u required by the resistance balance regulating valve 1jControlling the current opening u fed back by the motor 5 through the resistance balance adjusting valve and controlling the current opening u fed back by the motor 6 through the wind speed control adjusting valve0And v0And judging whether the opening of the two valves needs to be adjusted or not. If necessary, the opening degree is adjusted according to the opening degree calculated by the microcomputer controller.
The specific embodiment is as follows:
in this embodiment, taking a pressure difference between an inlet and an outlet of an air supply end of 5 pa, an air supply amount of 0.163 kg/s, and a distance between a bottom of an air inlet and a ground of 2.5m as an example, a functional relationship between u and v obtained through CFD (computational fluid dynamics) simulation is as follows:
u= 0.364v-0.715r = 0.9127, wherein R is the degree of fitting of the function, as shown in fig. 4, points on the polygonal line in the graph are the results obtained from the simulation, and the curve is the functional relationship of u and v obtained from the simulation results.
Taking three air supply distances of near, middle and far as an example, CFD (computational fluid dynamics) software is adopted for simulation calculation. When v =300mm, u =150mm, the main flow velocity of the tuyere is 1.27 m/s, at which the wind speed is minimum. At this wind speed, when the supply air temperature is 16 degrees, the ambient air temperature is 30 degrees, and the temperature difference is 14 degrees, the horizontal distance from the center of the air flow to the supply air outlet when the air flow falls to the height of 1.5 meters is 1.63 meters.
When v =200mm, u =180mm, the main flow velocity of the tuyere is 1.95 m/s, and the horizontal distance from the center of the air flow to the air blowing port when the air flow falls to a height of 1.5 m is 2.54 m.
When v =150mm, u =400mm, the main flow velocity of the tuyere is 2.6 m/s, and the horizontal distance from the center of the air flow to the air blowing port when the air flow falls to a height of 1.5 m is 3.19 m.
The blowing distances of the remaining blowing temperature differences Δ t can also be calculated according to the above method. The calculation results are shown in table 2.
Table 2 example corresponds of valve opening, air supply temperature difference and air supply distance
By T10=30.2°C，T9For example, 17.1 ℃ and x =2.5m, the following formula is solved:
it can be found that when i =2,
taking the minimum value.
J is further calculated according to the following equation.
It can be found that when j =2,
the minimum value is obtained, so that the required opening degree v of the wind speed control regulating valve (2) can be obtained2=0.2m, and the opening degree required by the resistance balance regulating valve is u2And =0.18m, then the two opening degree signals are sent to the two motors, and the corresponding valve opening degree is adjusted, so that air can be sent to the position closest to the personnel.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The variable-distance air supply end of the air conditioner is characterized by being suitable for a centralized air conditioning and air quantity fixing system and comprising a variable-distance air supply module and an intelligent control module;
the variable-distance air supply module comprises a resistance balance regulating valve (1), an air speed control regulating valve (2), an air flow buffer area (3) and an air pipe (4);
the resistance balance regulating valve (1) is installed at an air inlet of the air pipe (4), and the air speed control regulating valve (2) is installed at an air outlet of the air pipe (4); an airflow buffer area (3) is arranged between the resistance balance regulating valve (1) and the wind speed control regulating valve (2), and the airflow buffer area (3) is a section of pipeline expansion area to ensure that airflow reaches an air outlet to form a uniform flow field; when the wind speed control regulating valve (2) regulates the wind speed, the resistance balance regulating valve (1) is synchronously regulated to balance the resistance change caused by the regulation of the wind speed control regulating valve (2) so as to ensure that the total resistance and the wind volume of the wind pipe (4) are unchanged;
the air supply distance of the air conditioner is positively correlated with the air speed and the air supply temperature difference delta t, and the air supply temperature difference is the difference value between the indoor air temperature and the air supply temperature; a certain air supply temperature difference is set according to actual needs, and the air speed is adjusted through the air speed control adjusting valve (2), so that the air supply distance is adjusted;
the intelligent control module comprises an infrared sensor (7), a resistance balance regulating valve control motor (5), a wind speed control regulating valve control motor (6), a microcomputer controller (8), a temperature sensor (9) at an air outlet and an indoor air temperature sensor (10); detecting the difference value between the indoor air temperature and the air supply temperature of the air outlet through an indoor air temperature sensor (10) and an air outlet temperature sensor (9), recording the difference value as an air supply temperature difference delta t, detecting the position of a person through an infrared sensor (7), obtaining a signal of an air supply distance, and sending the signal to a microcomputer controller (8); the microcomputer controller (8) calculates two valve openness meeting the requirement of the air supply distance according to the corresponding relation of the air supply distance, the air supply temperature difference delta t, the resistance balance adjusting valve (1) and the opening of the wind speed control adjusting valve (2), sends an opening control signal to the resistance balance adjusting valve control motor (5) and the wind speed control adjusting valve control motor (6), adjusts the openings of the resistance balance adjusting valve (1) and the wind speed control adjusting valve (2), and realizes the control of different air supply distances.
2. The variable-distance air-conditioning air supply terminal capable of balancing air outlet resistance according to claim 1, characterized in that the adjustment relationship between the resistance balance adjusting valve (1) and the wind speed control adjusting valve (2) is as follows:
Su(u)+Sv(v)=(P/Q2)- S0
wherein S isuThe resistance of the resistance balance regulating valve (1) is shown, and u is the opening degree of the resistance balance regulating valve (1); svThe impedance of the wind speed control regulating valve (2) is shown, and v is the opening degree of the wind speed control regulating valve (2); p represents the flow pressure in Pa; q represents the flow rate in m3/s；S0The impedance of the resistance balance adjusting valve (1) and the impedance of the wind speed control adjusting valve (2) in the wind supply end are shown.
3. The variable-distance air conditioner air supply terminal capable of balancing air outlet resistance is characterized in that the air speed control regulating valve (2) changes the air speed by changing the area of an air outlet; the resistance balance regulating valve (1) is used for balancing the flow resistance which is changed due to the change of the opening degree of the air speed control regulating valve (2) in the pipeline of the air pipe (4), so that the resistance in the whole air pipe (4) is kept unchanged.
4. The variable-distance air-conditioning air supply terminal capable of balancing air outlet resistance according to claim 1, characterized in that the resistance balance adjusting valve (1) and the air speed control adjusting valve (2) are in the form of gate valves, and the valves change the area of the ventilation cross section of the pipeline at the valves through up-and-down translation movement; the opening range of the resistance balance adjusting valve (1) and the wind speed control adjusting valve (2) is from half of the cross section area of the pipeline to the total cross section area of the pipeline.
5. The variable-distance air conditioner air supply tail end capable of balancing air outlet resistance is characterized in that a pipeline expansion area is arranged between two valves to serve as an air flow buffer area (3) to ensure that an air flow forms a uniform flow field before reaching an air outlet; the shape of the air flow buffer area (3) is a square with the side length being twice the width of the inlet air pipe, an outlet pipeline of the air flow buffer area (3) is parallel to an inlet pipeline and is horizontally staggered, and the staggered distance is the width of the inlet pipeline.
6. The variable-distance air conditioner air supply terminal capable of balancing air outlet resistance as claimed in claim 1, wherein the air supply distance and the air supply range are adjusted by changing the angle of an air inlet and the air supply speed.
7. The method for adjusting the air supply tail end of the variable-distance air conditioner based on the balance air outlet resistance of any one of claims 1 to 6 is characterized by comprising the following specific steps of:
the method comprises the following steps: an infrared sensor (7) and an indoor air temperature sensor (10) are arranged in a room, an air outlet temperature sensor (9) is arranged at an air outlet, the infrared sensor (7) detects the position of a person, the air outlet temperature sensor (9) detects the air supply temperature of an air pipe, and the indoor air temperature sensor (10) detects the ambient temperature in the room;
step two: the information detected by the three is transmitted to a microcomputer controller (8);
step three: the microcomputer controller (8) calculates the opening degree of a resistance balance adjusting valve (1) and a wind speed control adjusting valve (2) required for sending airflow to the position of a person according to the air supply temperature difference delta t calculated by the indoor air temperature sensor (10) and the air outlet temperature sensor (9) and the position of the person detected by the infrared sensor (7);
step four: and (3) sending control signals to a resistance balance regulating valve control motor (5) and a wind speed control regulating valve control motor (6) by the microcomputer controller (8) according to the opening degrees of the resistance balance regulating valve (1) and the wind speed control regulating valve (2) required for sending the air flow to the position of the person obtained in the step three, regulating the opening degrees of the two valves and ensuring that the air flow is sent to the position of the person.
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| CN115183346A (en) * | 2022-06-21 | 2022-10-14 | 中建三局第一建设安装有限公司 | Method for respectively and independently controlling temperature, humidity and cleanliness of clean room |
| CN115493249A (en) * | 2022-11-16 | 2022-12-20 | 煜安特种阀门研制(深圳)有限公司 | Multi-valve-based temperature and humidity regulation and control method, device and system |
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| CN202074652U (en) * | 2011-05-25 | 2011-12-14 | 西安市四腾工程有限公司 | Differential pressure accurate control system for cleaning air-conditioning system |
| CN202532668U (en) * | 2012-03-13 | 2012-11-14 | 中国建筑西南设计研究院有限公司 | Air supply outlet with uniform constant air volume |
| CN203190560U (en) * | 2013-03-21 | 2013-09-11 | 卢孟龙 | Fire fighting air supply system |
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