Airplane test dual-channel air temperature and humidity adjusting and controlling system and adjusting and controlling method
阅读说明：本技术 飞机试验双通道空气温湿度调节控制系统及调节控制方法 (Airplane test dual-channel air temperature and humidity adjusting and controlling system and adjusting and controlling method ) 是由 成竹 王彬文 吴敬涛 雷凯 马建军 于 2021-12-10 设计创作，主要内容包括：本发明涉及飞机测试技术领域,公开了飞机试验双通道空气温湿度调节控制系统及调节控制方法,调节控制系统包括回风段、送风段、以及连通回风段、送风段用于调节空气温度与湿度的调节处理段；调节处理段包括若干个上下独立分布的双通道调节装置；调节控制方法包括：S1、空气经过回风段进入调节处理段；S2、双通道调节装置进行温度湿度调节；S3、处理后的空气通过干蒸汽加湿器增加湿度；S4、送风段将空气送出；S5、循环上述步骤S1～S4,直至空气达到目标温度和湿度；本发明提供的双通道循环空气温湿度调节控制系统及调节控制方法能够实现大型飞机气候实验室基础环境调节,并且具有可靠性高,操作简便的特点。(The invention relates to the technical field of airplane testing, and discloses a dual-channel air temperature and humidity adjusting and controlling system and an adjusting and controlling method for airplane testing, wherein the adjusting and controlling system comprises an air return section, an air supply section and an adjusting and processing section which is communicated with the air return section and the air supply section and is used for adjusting the temperature and the humidity of air; the adjusting and processing section comprises a plurality of double-channel adjusting devices which are independently distributed up and down; the regulation control method comprises the following steps: s1, the air enters the adjusting section through the air returning section; s2, adjusting the temperature and humidity by a double-channel adjusting device; s3, increasing the humidity of the treated air through a dry steam humidifier; s4, the air supply section sends out air; s5, repeating the steps S1-S4 until the air reaches the target temperature and humidity; the double-channel circulating air temperature and humidity adjusting and controlling system and the adjusting and controlling method provided by the invention can realize basic environment adjustment of a large-scale airplane climate laboratory, and have the characteristics of high reliability and simplicity and convenience in operation.)
1. The aircraft test dual-channel air temperature and humidity adjusting control system is characterized by comprising an air return section (1), an air supply section (2) and an adjusting and processing section (3) which is communicated with the air return section (1) and the air supply section (2) and is used for adjusting the air temperature and humidity;
the adjusting and processing section (3) comprises an air inlet (30) communicated with the air return section (1), an air outlet (31) communicated with the air supply section (2), and a plurality of double-channel adjusting devices (4) which are independently distributed up and down and two ends of each double-channel adjusting device are respectively connected with the air inlet (30) and the air outlet (31);
the double-channel adjusting device (4) comprises a first pipeline (40) with one end communicated with the air inlet (30), a second pipeline (41) with one end communicated with the air outlet (31) and arranged side by side with the first pipeline (40), a medium-high temperature adjusting channel (42) connected between the other end of the first pipeline (40) and the other end of the second pipeline (41), and a low-temperature adjusting channel (43) with one end communicated with the middle of the first pipeline (40) and the other end connected with the middle of the second pipeline (41);
a middle-high temperature centrifugal circulating fan (400) is arranged at the joint of the first pipeline (40) and the middle-high temperature adjusting channel (42); a low-temperature centrifugal circulating fan (401) is arranged at the joint of the first pipeline (40) and the low-temperature adjusting channel (43);
the medium-high temperature adjusting channel (42) comprises a first diffuser (420) communicated with a medium-high temperature centrifugal circulating fan (400), a medium-high temperature adjusting main pipe (421) communicated with the first diffuser (420), two first air valves (422) respectively arranged at two ends of the medium-high temperature adjusting main pipe (421), and a first heat exchange combined system arranged at the middle section of the medium-high temperature adjusting main pipe (421);
the first heat exchange combination system comprises a frosting heat exchanger A (423) close to the first diffuser (420), a steam heating heat exchanger (424) close to the second pipeline (41), and a medium temperature heat exchanger (425) arranged between the frosting heat exchanger A (423) and the steam heating heat exchanger (424);
the low-temperature adjusting channel (43) comprises a second diffuser (430) communicated with the low-temperature centrifugal circulating fan (401), a low-temperature adjusting main pipe (431) communicated with the second diffuser (430), two second air valves (432) respectively arranged at two ends of the low-temperature adjusting main pipe (431), and a second heat exchange combined system arranged at the middle section of the low-temperature adjusting main pipe (431);
the second heat exchange combination system comprises a frosting heat exchanger B (433) close to the second diffuser (430) and a low-temperature heat exchanger (434) arranged at a distance from the frosting heat exchanger B (433);
and a dry steam humidifier (410) positioned between the communication sections of the first air valve (422) and the second air valve (432) is arranged in the second pipeline (41).
2. Aircraft test dual-channel air temperature and humidity conditioning control system according to claim 1, characterized in that the dual-channel conditioning device (4) further comprises a fresh air system communicating with the first duct (40).
3. Aircraft test dual-channel air temperature and humidity regulation control system according to claim 1, characterized in that the second duct (41) is provided with a flow meter (411) inside the duct close to the air outlet (31).
4. The aircraft test dual-channel air temperature and humidity regulation and control system as claimed in claim 1, wherein the air return section (1) comprises a U-shaped channel (10) which is located inside an aircraft climate laboratory and has a downward opening, two air return inlets (11) which are respectively arranged at the lower end of the U-shaped channel (10), a flow guide plate (12) which is arranged at the joint of the horizontal section and the vertical section at the upper end of the U-shaped channel (10), and a connecting pipeline (13) which is arranged on the U-shaped channel (10) and is communicated with the air inlet (30).
5. The aircraft test dual-channel air temperature and humidity regulation and control system as claimed in claim 4, wherein the air supply section (2) comprises a static pressure box (20) communicated with an air outlet (31), a plurality of air supply pipelines (21) communicated with the static pressure box (20), and air supply cyclones (22) which are respectively arranged at the air outlet of the air supply pipelines (21) and have consistent heights.
6. The aircraft test dual-channel air temperature and humidity regulation and control system as claimed in claim 5, wherein the air supply duct (21) is a variable cross-section rectangle, and the side length range of the variable cross-section rectangle is 1000-3000 mm; two air outlets for independently installing an air supply swirler (22) are arranged on the air supply pipeline (21).
7. The aircraft test dual-channel air temperature and humidity adjusting control system as claimed in claim 5, wherein a temperature sensor and a humidity sensor are mounted in the air outlet of the air return opening (11) and the air outlet of the air supply pipeline (21).
8. The aircraft test dual-channel air temperature and humidity regulation and control system as claimed in claim 1, wherein electric heating devices are arranged on the surfaces of the frosting heat exchanger A (423), the steam heating heat exchanger (424), the medium temperature heat exchanger (425), the frosting heat exchanger B (433) and the low temperature heat exchanger (434).
9. The adjusting control method of the aircraft test dual-channel air temperature and humidity adjusting control system according to any one of claims 1 to 8, characterized by comprising the following steps:
s1, the air enters the adjusting section (3) through the air return section (1);
s2, adjusting the adjusting section (3) independently by adopting a medium-high temperature adjusting channel (42) or a low-temperature adjusting channel (43) according to the temperature adjusting requirement of the aircraft climate laboratory;
when the temperature of the aircraft climate laboratory is about to reach-55 to-25 ℃, a second air valve (432) is opened, a low-temperature centrifugal circulating fan (401) is started and drives air to enter a low-temperature adjusting main pipe (431) from an air return opening (11), and the air is processed by a second heat exchange combined system;
when the temperature of-25-74 ℃ is to be realized in an aircraft climate laboratory, a first air valve (422) is opened, a medium-high temperature centrifugal circulating fan (400) is started and drives air to enter a medium-high temperature adjusting main pipe (421) from an air return opening (11), and the air is treated by a first heat exchange combined system;
s3, increasing the humidity of the treated air through a dry steam humidifier (410);
s4, sending out air by the air supply section (2) through a plurality of uniformly distributed air supply cyclones (22);
and S5, repeating the steps S1-S4 until the air reaches the target temperature and humidity.
Technical Field
The invention relates to the technical field of airplane testing, in particular to a dual-channel air temperature and humidity adjusting and controlling system and an adjusting and controlling method for airplane testing.
Background
In the airplane test engineering, the climate test of the airplane is an important ring, the main purpose of the climate test is to evaluate the effectiveness of each system of the airplane under various extreme climate environmental conditions and estimate the risk level possibly borne by the airplane; the initial stage of the flight test under the extreme climatic environment condition is completed in an aircraft climatic environment laboratory, the problem area can be rapidly found out by performing the test under the controllable environment condition, and the problem of flight safety is solved as far as possible.
The airplane climate laboratory solves the problems of long time period, low repeatability and the like of natural environment by simulating the climate environments of the earth surface such as extreme low temperature, high temperature, damp and hot, snowfall, solar irradiation, ice and freezing rain, rain and freezing fog, and the like, and better meets the requirements of environmental adaptability verification tests of various devices in the industrial field.
In order to realize the simulation of the environment temperature and humidity required in design indexes by a large-scale airplane climate laboratory, meet the simulation of environments with larger requirements on cooling capacity, such as snowfall, ice accumulation, freezing rain, freezing fog and the like, and ensure the uniformity requirements of the air temperature and speed of the laboratory, an adjusting and controlling system capable of adjusting the basic environment temperature and humidity of the airplane climate laboratory is required to be designed.
Disclosure of Invention
The technical problem solved by the invention is as follows: the aircraft test dual-channel air temperature and humidity adjusting control system and the adjusting control method are high in reliability and simple to operate, and can adjust the basic environment of a large aircraft climate laboratory in a wide temperature range.
The technical scheme of the invention is as follows: the aircraft test dual-channel air temperature and humidity adjusting control system comprises an air return section, an air supply section and an adjusting processing section which is communicated with the air return section and the air supply section and is used for adjusting the temperature and the humidity of air;
the adjusting and processing section comprises an air inlet communicated with the air return section, an air outlet communicated with the air supply section and a plurality of double-channel adjusting devices which are independently distributed up and down and two ends of each double-channel adjusting device are respectively connected with the air inlet and the air outlet;
the double-channel adjusting device comprises a first pipeline, a second pipeline, a medium-high temperature adjusting channel and a low-temperature adjusting channel, wherein one end of the first pipeline is communicated with the air inlet, one end of the second pipeline is communicated with the air outlet and is arranged side by side with the first pipeline, the medium-high temperature adjusting channel is connected between the other end of the first pipeline and the other end of the second pipeline, one end of the low-temperature adjusting channel is communicated with the middle of the first pipeline, and the other end of the low-temperature adjusting channel is connected with the middle of the second pipeline;
a middle-high temperature centrifugal circulating fan is arranged at the joint of the first pipeline and the middle-high temperature adjusting channel; a low-temperature centrifugal circulating fan is arranged at the joint of the first pipeline and the low-temperature adjusting channel;
the medium-high temperature adjusting channel comprises a first diffuser communicated with a medium-high temperature centrifugal circulating fan, a medium-high temperature adjusting main pipe communicated with the first diffuser, two first air valves respectively arranged at two ends of the medium-high temperature adjusting main pipe, and a first heat exchange combined system arranged at the middle section of the medium-high temperature adjusting main pipe;
the first heat exchange combined system comprises a frosting heat exchanger A close to the first diffuser, a steam heating heat exchanger close to the second pipeline, and a medium temperature heat exchanger arranged between the frosting heat exchanger A and the steam heating heat exchanger;
the low-temperature adjusting channel comprises a second diffuser communicated with the low-temperature centrifugal circulating fan, a low-temperature adjusting main pipe communicated with the second diffuser, two second air valves respectively arranged at two ends of the low-temperature adjusting main pipe, and a second heat exchange combined system arranged at the middle section of the low-temperature adjusting main pipe;
the second heat exchange combined system comprises a frosting heat exchanger B close to the second diffuser and a low-temperature heat exchanger arranged at an interval with the frosting heat exchanger B;
and a dry steam humidifier positioned between the first air valve and the second air valve communicating section is arranged in the second pipeline.
Furthermore, the dual-channel adjusting device also comprises a fresh air system communicated with the first pipeline; the fresh air system can be used for quickly and effectively connecting the aircraft climate laboratory with the external environment, can be used for compensating and adjusting the air pressure, temperature and humidity in the aircraft climate laboratory, and has the characteristics of low energy consumption and convenience in implementation.
Furthermore, a flow meter is arranged inside the second pipeline close to the air outlet; the flowmeter adopts a pitot tube with a heating function, the mounting position is at the position where the airflow of the pipeline is stable, and the airflow in the pipeline is analyzed through the average value of data measured by a plurality of pitot tubes; the realization is convenient for carry out accurate control to the temperature of aircraft climate laboratory to the accurate measurement of second pipeline air outlet department air current.
Furthermore, the air return section comprises a U-shaped channel which is positioned in the aircraft climate laboratory and has a downward opening, two air return openings which are respectively arranged at the lower end of the U-shaped channel, a guide plate which is arranged at the joint of the horizontal section and the vertical section at the upper end of the U-shaped channel, and a connecting pipeline which is arranged on the U-shaped channel and is communicated with the air inlet; the return air inlets of the U-shaped channels are located on two sides of the bottom end of the aircraft climate laboratory, and the mode of returning air jointly through the two return air inlets is adopted, so that the laboratory airflow can be effectively stabilized, the resistance of a pipeline is reduced, and the uniformity of the laboratory airflow is guaranteed.
Furthermore, the air supply section comprises a static pressure box communicated with the air outlet, a plurality of air supply pipelines communicated with the static pressure box, and air supply cyclones which are respectively arranged at the air outlet of the air supply pipelines and have consistent height; the air supply angle of the cyclone is adjustable, and the uniformity of the airflow of the airplane climate laboratory is improved in a partition layout and independent control mode.
Furthermore, the air supply pipeline is a variable cross-section rectangle, and the side length range of the variable cross-section rectangle is 1000-3000 mm; the air supply pipeline is provided with two air outlets which are independently provided with air supply swirlers; the angle of the air supply swirler is convenient to adjust, and the air supply pipeline with the variable cross-section design can ensure that the air supply pressure of the two independent air supply swirlers is consistent, so that the uniformity of air supply airflow is ensured.
Furthermore, a temperature sensor and a humidity sensor are arranged in the air return inlet and the air outlet of the air supply pipeline; the temperature sensor and the humidity sensor which are arranged at the air return inlet can detect the temperature and the humidity of the air at the air return inlet; the temperature sensor and the humidity sensor which are arranged at the air outlet of the air supply pipeline can detect the temperature and the humidity at the air outlet; through the temperature and the humidity of real-time detection return air inlet, air outlet department, can improve the accuracy nature of air temperature, humidity control in the aircraft climate laboratory.
Furthermore, the surfaces of the frosting heat exchanger A, the steam heating heat exchanger, the medium temperature heat exchanger, the frosting heat exchanger B and the low temperature heat exchanger are all provided with electric heating devices; the electric heating device can prevent the problem that frost or liquid water on the surface of each heat exchanger freezes in the pipeline, and ensures the high-efficiency operation of each heat exchanger.
The adjusting control method of the aircraft test dual-channel air temperature and humidity adjusting control system comprises the following steps:
s1, the air enters the adjusting section through the air returning section;
s2, adjusting the middle-high temperature adjusting channel or the low temperature adjusting channel independently by the adjusting section according to the temperature adjusting requirement of the airplane climate laboratory;
when the temperature of the aircraft climate laboratory is about to reach-55 ℃ to-25 ℃, a second air valve is opened, a low-temperature centrifugal circulating fan is started and drives air to enter a low-temperature adjusting main pipe from an air return port, and the air is processed through a second heat exchange combined system;
when the temperature of-25-74 ℃ is to be realized in an aircraft climate laboratory, a first air valve is opened, a medium-high temperature centrifugal circulating fan is started and drives air to enter a medium-high temperature adjusting main pipe from an air return opening, and the air is treated by a first heat exchange combined system;
s3, increasing the humidity of the treated air through a dry steam humidifier;
s4, sending out air by the air supply section through a plurality of air supply swirlers which are uniformly distributed;
and S5, repeating the steps S1-S4 until the air reaches the target temperature and humidity.
The invention has the beneficial effects that: the invention provides the aircraft test dual-channel air temperature and humidity adjusting control system and the adjusting control method which have high reliability and simple operation, and can adjust the basic environment of a large aircraft climate laboratory in a wide temperature range; the double-channel adjusting device comprises a low-temperature adjusting channel and a medium-high temperature adjusting channel; when complex comprehensive climate simulation is carried out, the temperature of an airplane climate laboratory is regulated within a temperature range of-55 ℃ to 74 ℃ through a low-temperature regulating channel, a medium-high temperature regulating channel and the combination of the low-temperature regulating channel and the medium-high temperature regulating channel; compared with the existing single-channel circulation design, the double-channel circulation regulation structure is simple in form, the reliability in the engineering practice process is greatly improved, and the operation is further simplified; the aircraft test dual-channel air temperature and humidity adjusting and controlling system can be flexibly distributed, the uniformity of airflow in an aircraft climate laboratory is improved, the airflow in the laboratory can be stabilized by adopting a mode that two air return inlets return air together at two sides of the bottom end of the aircraft climate laboratory, the resistance of a pipeline is reduced, and the uniformity of an airflow velocity field and a temperature field in the aircraft climate laboratory can be realized by regional distribution of the air supply swirlers.
Drawings
FIG. 1 is a flow chart of a temperature and humidity regulation control method of the present invention;
FIG. 2 is a plan view of the whole structure of embodiment 1 of the present invention;
FIG. 3 is a schematic external view of a dual channel adjustment apparatus according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the internal structure of a dual channel adjusting apparatus according to embodiment 1 of the present invention;
FIG. 5 is a schematic structural view of a return air section in embodiment 1 of the present invention;
FIG. 6 is a schematic perspective view of the air supply section according to embodiment 1 of the present invention;
FIG. 7 is a plan view of an air blowing section in embodiment 1 of the present invention;
wherein, 1-air return section, 2-air supply section, 3-adjustment treatment section, 30-air inlet, 31-air outlet, 4-double channel adjusting device, 40-first pipeline, 41-second pipeline, 42-middle and high temperature adjusting channel, 43-low temperature adjusting channel, 400-middle and high temperature centrifugal circulating fan, 401-low temperature centrifugal circulating fan, 420-first diffuser, 421-middle and high temperature adjusting main pipe, 422-first air valve, 423-frosting heat exchanger A, 424-steam heating heat exchanger, 425-middle temperature heat exchanger, 430-second diffuser, 431-low temperature adjusting main pipe, 432-second air valve, 433-frosting heat exchanger B, 434-low temperature heat exchanger, 410-dry steam humidifier, 411-flowmeter, 10-U-shaped channel, 11-return air inlet, 12-guide plate, 13-connecting pipeline, 20-static pressure box, 21-air supply pipeline and 22-air supply swirler.
Detailed Description
Example 1
The aircraft test dual-channel air temperature and humidity adjusting control system shown in fig. 2 comprises an air return section 1, an air supply section 2, and an adjusting processing section 3 which is communicated with the air return section 1 and the air supply section 2 and used for adjusting the temperature and the humidity of air;
as shown in fig. 3, the adjusting section 3 includes an air inlet 30 communicated with the air return section 1, an air outlet 31 communicated with the air supply section 2, and 2 dual-channel adjusting devices 4 which are independently distributed up and down and have two ends respectively connected with the air inlet 30 and the air outlet 31;
the double-channel adjusting device 4 comprises a first pipeline 40, a second pipeline 41, a medium-high temperature adjusting channel 42 and a low-temperature adjusting channel 43, wherein one end of the first pipeline 40 is communicated with the air inlet 30, one end of the second pipeline 41 is communicated with the air outlet 31 and is arranged side by side with the first pipeline 40, one end of the medium-high temperature adjusting channel is connected between the other end of the first pipeline 40 and the other end of the second pipeline 41, and one end of the low-temperature adjusting channel is communicated with the middle part of the first pipeline 40, and the other end of the low-temperature adjusting channel is connected with the middle part of the second pipeline 41;
as shown in fig. 4, a middle-high temperature centrifugal circulation fan 400 is arranged at the joint of the first pipeline 40 and the middle-high temperature adjusting channel 42; a low-temperature centrifugal circulating fan 401 is arranged at the joint of the first pipeline 40 and the low-temperature adjusting channel 43;
the medium-high temperature adjusting channel 42 comprises a first diffuser 420 communicated with the medium-high temperature centrifugal circulating fan 400, a medium-high temperature adjusting main pipe 421 communicated with the first diffuser 420, two first air valves 422 respectively arranged at two ends of the medium-high temperature adjusting main pipe 421, and a first heat exchange combined system arranged at the middle section of the medium-high temperature adjusting main pipe 421;
the first heat exchange combined system comprises a frosting heat exchanger A423 close to the first diffuser 420, a steam heating heat exchanger 424 close to the second pipe 41, and an intermediate temperature heat exchanger 425 arranged between the frosting heat exchanger A423 and the steam heating heat exchanger 424;
the low-temperature adjusting channel 43 comprises a second diffuser 430 communicated with the low-temperature centrifugal circulating fan 401, a low-temperature adjusting main pipe 431 communicated with the second diffuser 430, two second air valves 432 respectively arranged at two ends of the low-temperature adjusting main pipe 431, and a second heat exchange combined system arranged at the middle section of the low-temperature adjusting main pipe 431;
the second heat exchange combined system comprises a frosting heat exchanger B433 close to the second diffuser 430, and a low-temperature heat exchanger 434 arranged at a distance from the frosting heat exchanger B433;
the second pipe 41 is provided with a dry steam humidifier 410 arranged between the communicating sections of the first air valve 422 and the second air valve 432.
The two-channel adjusting device 4 further comprises a fresh air system which is communicated with the first pipeline 40.
The second duct 41 is provided with a flow meter 411 inside the duct near the outlet 31.
As shown in fig. 5, the air return section 1 includes a U-shaped channel 10 located inside the aircraft climate laboratory and having a downward opening, two air return openings 11 respectively disposed at the lower end of the U-shaped channel 10, a baffle 12 disposed at the joint of the horizontal section and the vertical section at the upper end of the U-shaped channel 10, and a connecting pipe 13 disposed on the U-shaped channel 10 and communicated with the air inlet 30.
The air supply section 2 comprises a static pressure box 20 communicated with the air outlet 31, 3 air supply pipelines 21 communicated with the static pressure box 20, and air supply cyclones 22 which are respectively arranged at the air outlets of the air supply pipelines 21 and have the same height.
As shown in fig. 6 and 7, the air supply duct 21 is a variable cross-section rectangle, and the side length range of the variable cross-section rectangle is 1000-3000 mm; the air supply duct 21 is provided with two air outlets for independently installing air supply swirlers 22.
And temperature sensors and humidity sensors are respectively arranged in the air return opening 11 and the air outlet of the air supply pipeline 21.
Electric heating devices are arranged on the surfaces of the frosting heat exchanger A423, the steam heating heat exchanger 424, the medium temperature heat exchanger 425, the frosting heat exchanger B433 and the low temperature heat exchanger 434.
Wherein, the frosting heat exchanger A423 adopts a commercially available LM-8 frosting heat exchanger, the steam heating heat exchanger 424 adopts a commercially available high-temperature steam heat exchanger, and the frosting heat exchanger B433 adopts a commercially available high-temperature steam heat exchangerWith commercially available CH2Cl2The frosting heat exchanger, the medium temperature heat exchanger 425 is a commercially available LM-8 medium temperature heat exchanger, and the low temperature heat exchanger 434 adopts commercially available CH2Cl2A low temperature heat exchanger; the flow meter 411, the electric heating device, the temperature sensor, the humidity sensor, the air supply cyclone 22 and the fresh air system are all commercially available products in the prior art, and the specific product types can be selected by those skilled in the art according to needs.
Example 2
As shown in fig. 2, the aircraft test dual-channel air temperature and humidity adjusting control system comprises an air return section 1, an air supply section 2, and an adjusting processing section 3 which is communicated with the air return section 1 and the air supply section 2 and used for adjusting the temperature and the humidity of air;
as shown in fig. 3, the adjusting section 3 includes an air inlet 30 communicated with the air return section 1, an air outlet 31 communicated with the air supply section 2, and 3 dual-channel adjusting devices 4 which are independently distributed up and down and of which two ends are respectively connected with the air inlet 30 and the air outlet 31;
the double-channel adjusting device 4 comprises a first pipeline 40, a second pipeline 41, a medium-high temperature adjusting channel 42 and a low-temperature adjusting channel 43, wherein one end of the first pipeline 40 is communicated with the air inlet 30, one end of the second pipeline 41 is communicated with the air outlet 31 and is arranged side by side with the first pipeline 40, one end of the medium-high temperature adjusting channel is connected between the other end of the first pipeline 40 and the other end of the second pipeline 41, and one end of the low-temperature adjusting channel is communicated with the middle part of the first pipeline 40, and the other end of the low-temperature adjusting channel is connected with the middle part of the second pipeline 41;
as shown in fig. 4, a middle-high temperature centrifugal circulation fan 400 is arranged at the joint of the first pipeline 40 and the middle-high temperature adjusting channel 42; a low-temperature centrifugal circulating fan 401 is arranged at the joint of the first pipeline 40 and the low-temperature adjusting channel 43;
the medium-high temperature adjusting channel 42 comprises a first diffuser 420 communicated with the medium-high temperature centrifugal circulating fan 400, a medium-high temperature adjusting main pipe 421 communicated with the first diffuser 420, two first air valves 422 respectively arranged at two ends of the medium-high temperature adjusting main pipe 421, and a first heat exchange combined system arranged at the middle section of the medium-high temperature adjusting main pipe 421;
the first heat exchange combined system comprises a frosting heat exchanger A423 close to the first diffuser 420, a steam heating heat exchanger 424 close to the second pipe 41, and an intermediate temperature heat exchanger 425 arranged between the frosting heat exchanger A423 and the steam heating heat exchanger 424;
the low-temperature adjusting channel 43 comprises a second diffuser 430 communicated with the low-temperature centrifugal circulating fan 401, a low-temperature adjusting main pipe 431 communicated with the second diffuser 430, two second air valves 432 respectively arranged at two ends of the low-temperature adjusting main pipe 431, and a second heat exchange combined system arranged at the middle section of the low-temperature adjusting main pipe 431;
the second heat exchange combined system comprises a frosting heat exchanger B433 close to the second diffuser 430, and a low-temperature heat exchanger 434 arranged at a distance from the frosting heat exchanger B433;
the second pipe 41 is provided with a dry steam humidifier 410 arranged between the communicating sections of the first air valve 422 and the second air valve 432.
The two-channel adjusting device 4 further comprises a fresh air system which is communicated with the first pipeline 40.
A flow meter 411 is arranged in the second pipeline 41 close to the air outlet 31; the flowmeter 411 adopts 30 pitot tubes with heating function, and the pitot tubes are uniformly distributed in the pipeline close to the air outlet 31;
as shown in fig. 5, the air return section 1 includes a U-shaped channel 10 located inside the aircraft climate laboratory and having a downward opening, two air return openings 11 respectively disposed at the lower end of the U-shaped channel 10, a baffle 12 disposed at the joint of the horizontal section and the vertical section at the upper end of the U-shaped channel 10, and a connecting pipe 13 disposed on the U-shaped channel 10 and communicated with the air inlet 30.
As shown in fig. 6 and 7, the air supply section 2 includes a plenum box 20 communicated with the air outlet 31, 3 air supply ducts 21 communicated with the plenum box 20, and air supply swirlers 22 respectively disposed at air outlets of the air supply ducts 21 and having the same height.
The air supply pipeline 21 is a variable cross-section rectangle, and the side length range of the variable cross-section rectangle is 1000-3000 mm; the air supply duct 21 is provided with two air outlets for independently installing air supply swirlers 22.
And temperature sensors and humidity sensors are respectively arranged in the air return opening 11 and the air outlet of the air supply pipeline 21.
Electric heating devices are arranged on the surfaces of the frosting heat exchanger A423, the steam heating heat exchanger 424, the medium temperature heat exchanger 425, the frosting heat exchanger B433 and the low temperature heat exchanger 434.
The first pipeline 40, the second pipeline 41, the medium-high temperature adjusting main pipe 421 and the low temperature adjusting main pipe 431 are all heat insulation pipelines;
and the side walls of the medium-high temperature adjusting main pipe 421 and the low temperature adjusting main pipe 431 are provided with maintenance windows.
Wherein, the frosting heat exchanger A423 adopts a commercially available LM-8 frosting heat exchanger, the steam heating heat exchanger 424 adopts a commercially available high-temperature steam heat exchanger, and the frosting heat exchanger B433 adopts a commercially available CH2Cl2The frosting heat exchanger, the medium temperature heat exchanger 425 is a commercially available LM-8 medium temperature heat exchanger, and the low temperature heat exchanger 434 adopts commercially available CH2Cl2A low temperature heat exchanger; the electric heating device, the temperature sensor, the humidity sensor, the air supply cyclone 22 and the fresh air system are all commercially available products in the prior art, and specific product types can be selected by those skilled in the art according to needs.
Compared with the embodiment 1, the embodiment realizes the accurate detection of the outlet air flow through 30 evenly distributed pitot tubes, and improves the control precision of the temperature and the humidity of the airplane climate laboratory; the arrangement of the heat insulation pipeline can reduce the energy exchange between the pipeline and the external environment and reduce the energy consumption; the arrangement of the access window facilitates quick maintenance of the first heat exchange combined system and the second heat exchange combined system, and operability is improved.
Example 3
The present embodiment describes an adjustment control method of the aircraft test dual-channel air temperature and humidity adjustment control system in embodiment 1, as shown in fig. 1, including the following steps:
s1, the air enters the adjusting section 3 through the air return section 1;
s2, adjusting the adjusting section 3 by adopting a medium-high temperature adjusting channel 42 or a low-temperature adjusting channel 43 according to the temperature adjusting requirement of the airplane climate laboratory;
when the temperature of the aircraft climate laboratory is about to reach-55 ℃ to-25 ℃, a second air valve 432 is opened, the low-temperature centrifugal circulating fan 401 is started and drives air to enter a low-temperature adjusting main pipe 431 from an air return opening 11, and the air is processed by a second heat exchange combined system;
when the temperature of-25-74 ℃ is to be realized in an aircraft climate laboratory, a first air valve 422 is opened, a medium-high temperature centrifugal circulating fan 400 is started and drives air to enter a medium-high temperature adjusting main pipe 421 from an air return opening 11, and the air is treated by a first heat exchange combined system;
s3, increasing the humidity of the treated air through the dry steam humidifier 410;
s4, sending out air by the air supply section 2 through 6 air supply swirlers 22 which are uniformly distributed;
and S5, repeating the steps S1-S4 until the air reaches the target temperature and humidity.
Application example
The device of example 2 was used in a batch of 28000m3The airplane climate laboratory verifies the adaptability of the climate environment of the whole plane of a certain fighter plane;
the main technical indexes are as follows:
temperature range: -55 ℃ to 74 ℃;
cooling rate: cooling to-55 deg.C at normal temperature for 24 hr;
the heating rate is as follows: the temperature increased to +74 ℃ at 8 hours.
The specific regulation control method comprises the following steps:
s1, the air enters the adjusting section 3 through the air return section 1;
s2, adjusting the adjusting section 3 by adopting a medium-high temperature adjusting channel 42 or a low-temperature adjusting channel 43 according to the temperature adjusting requirement of the airplane climate laboratory;
when the temperature of the aircraft climate laboratory is about to reach-55 ℃ to-25 ℃, a second air valve 432 is opened, the low-temperature centrifugal circulating fan 401 is started and drives air to enter a low-temperature adjusting main pipe 431 from an air return opening 11, and the air is processed by a second heat exchange combined system;
when the temperature of-25-74 ℃ is to be realized in an aircraft climate laboratory, a first air valve 422 is opened, a medium-high temperature centrifugal circulating fan 400 is started and drives air to enter a medium-high temperature adjusting main pipe 421 from an air return opening 11, and the air is treated by a first heat exchange combined system;
when a test with a large heat load such as snowfall, freezing rain, freezing fog and the like is carried out, the middle-high temperature adjusting main pipe 421 is opened at the same time, and the temperature is lowAn adjusting main pipe 431; firstly passes through LM-8 frosting heat exchanger and CH2Cl2The frosting heat exchanger dehumidifies the air, obtains partial cold quantity, and then passes through the LM-8 medium temperature heat exchanger and the CH2Cl2The low-temperature heat exchanger obtains cold energy;
s3, increasing the humidity of the treated air through the dry steam humidifier 410;
s4, sending air out by the air sending section 2 through a plurality of evenly distributed air sending swirlers 22;
and S5, repeating the steps S1-S4 until the air reaches the target temperature and humidity.