All-working-condition comprehensive environment adjusting system

Abstract

The invention discloses an all-working-condition comprehensive environment adjusting system which comprises an air filter, a first-stage compressor, a second-stage compressor, an expansion machine, a first three-way valve, a second three-way valve, a third three-way valve, a first electric adjusting valve, a second electric adjusting valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, an outdoor fan, an outdoor heat exchanger, an indoor heat exchanger, an indoor fan, a molecular sieve oxygen generator, a water pump and an air valve. An air compression refrigeration cycle and a cooling liquid heat exchange cycle are formed respectively, and the air compression refrigeration cycle can achieve three modes of full fresh air, mixed air inlet and internal circulation. According to the invention, a reverse Brayton cycle principle adopting air as a cycle is provided, and a comprehensive environment regulation system function and working area division scheme can be provided according to different requirements of human equipment and personnel on the comprehensive environment regulation system under the full working condition environment conditions of different altitudes and environment temperatures.

Description

Technical Field

[0001] The present invention relates to the field of comprehensive environmental regulation systems, in particular to a comprehensive environmental regulation system for all working conditions. Background Art

[0002] With the rapid development of high-tech weapons characterized by information technology, weapon systems generate significant heat while exerting their powerful performance. Maintaining operator comfort plays a decisive role in fully realizing the performance of weapon systems. Therefore, the integrated environmental conditioning system for weapon combat units, such as armored vehicles, tanks, and specialized weapon equipment vehicles, is a key link in the comprehensive design of weapon systems, encompassing factors such as personnel and equipment.

[0003] At present, the technical status of the comprehensive environmental conditioning system for all-condition equipment and personnel is as follows: ① Equipment cooling: Under full operating conditions (-40°C to 55°C), the heat generated by equipment accumulates, causing a sharp decline in performance. To address this issue, equipment with cooling capabilities is required to maintain a stable cabin temperature to maximize the equipment's high performance. Existing equipment uses technologies such as Freon compression refrigeration or forced air-to-liquid heat exchange.

[0004] ② Personnel cooling / fresh air and filtration: Under high-temperature operating conditions (35°C to 55°C), when the cabin is exposed to the outdoors, convection caused by solar radiation and the temperature difference between inside and outside the cabin can quickly raise the cabin temperature above 35°C. This significantly reduces the operator's operational capabilities under these conditions. To address this issue, equipment with cooling capabilities is required. Existing equipment uses the Freon compression refrigeration principle.

[0005] ③ Personnel Heating: To maintain cabin comfort in low-temperature operating conditions (-40°C to 0°C), it is generally recommended to equip the cabin with air conditioning equipment with heating capabilities (integrated with the air conditioning equipment in ② above). Existing equipment utilizes heat recovery from engine preheating or electric heating.

[0006] ④ Oxygen supply / cabin pressurization: Operators operating at high altitudes (≥3000m) can experience altitude sickness, including headaches, dizziness, insomnia, fatigue, and blurred vision. The effects increase with altitude, so oxygen generation or pressurization equipment is necessary to address this issue. Existing equipment uses molecular sieve oxygen generation technology, while pressurization technology utilizes independent piping with a booster fan to increase cabin pressure.

[0007] To address the environmental regulation issues faced by all-condition equipment and personnel, existing technologies require four independent equipment units: cooling equipment, personnel cooling / heating air conditioning equipment, personnel oxygen generators, and cabin pressurization equipment. However, these four units have the following deficiencies: ① If the cooling equipment and personnel air conditioning equipment that adopts the Freon compression refrigeration principle leaks refrigerant, the equipment will fail and become inoperable.

[0008] ② Equipment cooling equipment that uses the principle of forced air-liquid heat exchange is prone to coolant leakage under low temperature conditions.

[0009] ③ The personnel air conditioning system using the engine preheat recovery principle is complex and cannot generate heat when the vehicle is parked.

[0010] ④ The energy consumption of air-conditioning equipment using electric heating is high, and there will be safety hazards if the control fails.

[0011] ⑤ Each device is configured separately, making lightweight and miniaturized design impossible; each device operates independently, making integrated design and control impossible.

[0012] Based on the technical status of the above-mentioned equipment and personnel integrated environmental regulation system, in order to solve the shortcomings of the existing equipment technology status, combined with the technical advantages of the reverse Brayton air compression principle, the present invention proposes a full-condition equipment and personnel integrated environmental regulation system. Summary of the Invention

[0013] The present invention proposes a comprehensive environmental control system for all working conditions to solve the problems of low integration and low reliability of equipment and personnel environmental control systems in the prior art.

[0014] In order to achieve the above object, the technical solution adopted by the present invention is: A comprehensive environmental control system for all working conditions, comprising a first-stage compressor (2), a second-stage compressor (6), an expander (15), a 1# three-way valve (5), a 2# three-way valve (13), a 3# three-way valve (19), a 1# electric regulating valve (8), a 2# electric regulating valve (14), a 1# heat exchanger (18), a 2# heat exchanger (7), a 3# heat exchanger (16), an outdoor heat exchanger (4) and an outdoor fan (3) configured therewith, an indoor heat exchanger (10) and an indoor fan (11) configured therewith, a molecular sieve oxygen generator (9), and a water pump (17); The inlet of the first-stage compressor (2) is connected to the outside of the cabin. The inlet of the first-stage compressor (2) is also connected to a valve port of the 3# three-way valve (19) through a pipeline, thereby allowing the first-stage compressor (2) to take in fresh air from the outside of the cabin and air in the cabin that flows through the 3# three-way valve (19); the outlet of the first-stage compressor (2) is connected to the air side inlet of the 1# heat exchanger (18) through a pipeline, the air side outlet of the 1# heat exchanger (18) is connected to the inlet of the second-stage compressor (6) through a pipeline, and the outlet of the second-stage compressor (6) is connected to the air side inlet of the 2# heat exchanger (7) through a pipeline; The air side outlet of the 2# heat exchanger (7) has two pipelines. The first pipeline of the air side outlet of the 2# heat exchanger is connected to the inlet of the 1# electric regulating valve (8). The outlet of the 1# electric regulating valve (8) is connected to the inlet of the molecular sieve oxygen generator (9) through a pipeline. The outlet of the molecular sieve oxygen generator (9) leads to the personnel cabin through a pipeline. The second outlet of the air side outlet of the 2# heat exchanger (7) is connected to the inlet of the expander (15) through a pipeline. The outlet of the expander (15) is connected to one valve port of the 2# three-way valve (13). The other valve port of the 2# three-way valve (13) leads to the equipment cabin through a pipeline. The inlet of the 2# electric regulating valve (14) is connected to the exhaust port in the cabin, the third valve port of the 2# three-way valve (13) and the outlet of the 2# electric regulating valve (14) are connected to the air side inlet of the 3# heat exchanger (16) through a pipeline, the air side outlet of the 3# heat exchanger (16) is connected to the other valve port of the 3# three-way valve (19) through a pipeline, and the third valve port of the 3# three-way valve (19) is connected to the outside of the cabin through a pipeline; The outlet of the water pump (17) is connected to the cooling liquid side inlet of the 1# heat exchanger (18) through a pipeline, and the cooling liquid side outlet of the 1# heat exchanger (18) is connected to the inlet of the 1# three-way valve (5) through a pipeline; the 1# three-way valve (5) has two outlets, and the two outlets of the 1# three-way valve (5) are respectively connected to the inlets of the indoor heat exchanger (10) and the outdoor heat exchanger (4), and the outlets of the indoor heat exchanger (10) and the outdoor heat exchanger (4) are both connected to the cooling liquid side inlet of the 2# heat exchanger (7), and the cooling liquid side outlet of the 2# heat exchanger (7) is connected to the cooling liquid side inlet of the 3# heat exchanger (16) through a pipeline, and the cooling liquid side outlet of the 3# heat exchanger (16) is connected to the inlet of the water pump (17) through a pipeline.

[0015] Furthermore, the inlet of the first-stage compressor (2) is simultaneously connected to the outside of the cabin and the 3# three-way valve (19), and is connected to the outside of the cabin to realize the fresh air compression refrigeration cycle, and is connected to the 3# three-way valve (19) to realize the indoor circulating air compression cycle and pressurization cycle, and by adjusting the opening of the 3# three-way valve (19) between 0 and 100%, the cabin mixed air compression cycle and pressurization cycle are realized.

[0016] Furthermore, the air side outlet of the 2# heat exchanger (7) is simultaneously connected to the 1# electric regulating valve (8) and the expander (15), and the flow rate of compressed air entering the molecular sieve oxygen generator (9) is controlled by adjusting the opening of the 1# electric regulating valve (8), thereby further controlling the oxygen production output by the system.

[0017] Furthermore, the first-stage compressor (2) and the second-stage compressor (6) are both high-speed centrifugal compressors, and the first-stage compressor (2) and the second-stage compressor (6) are independently driven; the expander (15) is a high-speed turbine expander, and the expander (15) is independently driven, or the expander (15) and the second-stage compressor (6) are coaxially driven.

[0018] Furthermore, by adjusting the opening of the 2# three-way valve (13), the cooling capacity in the equipment compartment can be adjusted from 0 to 100% steplessly.

[0019] Furthermore, the outlet of the 1# three-way valve (5) is connected to the inlets of the indoor heat exchanger (10) and the outdoor heat exchanger (4) through pipelines, thereby realizing the start and stop of the heating function in the personnel cabin.

[0020] Furthermore, the coolant flows through the 1# heat exchanger (18), the 2# heat exchanger (7), and the 3# heat exchanger (16) in sequence under the action of the water pump (17), thereby realizing multiple heat recovery, and then flows to the outdoor heat exchanger (4) to discharge the heat outside the cabin or flows to the indoor heat exchanger (10) to send the heat to the personnel cabin to achieve heating for the personnel.

[0021] Furthermore, an air valve (12) is provided between the personnel cabin and the equipment cabin, and the temperature requirements of the personnel cabin and the equipment cabin are matched by adjusting the opening and closing of the air valve (12).

[0022] Compared with the prior art, the present invention has the following advantages: 1. The present invention integrates equipment cooling, personnel cooling, personnel heating, personnel oxygenation, cabin fresh air and filtration, cabin pressurization and other functions into one system, with high integration; 2. The present invention uses air as the circulating working medium, which is safe, environmentally friendly, and highly reliable. It can achieve full operating adaptability in a wide temperature range (-40°C to 55°C) and plateau environments (0 to 5500m); 3. The present invention can be coupled according to the different functions required by personnel and equipment according to the altitude and ambient temperature. It is easy to operate and easy to achieve high automation and high reliability.

[0023] 4. The system of the present invention is highly integrated, and it is easy to realize the lightweight design and miniaturization design of the environmental control device.

[0024] 5. The technology of the present invention is mature and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structural principle of the system of the present invention when it is working.

[0026] Figure 2 This is a diagram of the working area division of the present invention.

[0027] Markings in the figure: 1-air filter, 2-first-stage compressor, 3-outdoor fan, 4-outdoor heat exchanger, 5-1# three-way valve, 6-second-stage compressor, 7-2# heat exchanger, 8-1# electric regulating valve, 9-molecular sieve oxygen generator, 10-indoor heat exchanger, 11-indoor fan, 12-air valve, 13-2# three-way valve, 14-2# electric regulating valve, 15-expander, 16-3# heat exchanger, 17-water pump, 18-1# heat exchanger, 19-3# three-way valve. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and examples.

[0029] like Figure 1 As shown, this embodiment discloses a comprehensive environmental control system for all working conditions, which is characterized by including an air filter 1, a first-stage compressor 2, a second-stage compressor 6, an expander 15, a 1# three-way valve 5, a 2# three-way valve 13, a 3# three-way valve 19, a 1# electric regulating valve 8, a 2# electric regulating valve 14, a 1# heat exchanger 18, a 2# heat exchanger 7, a 3# heat exchanger 16, an outdoor heat exchanger 4 and its configured outdoor fan 3, an indoor heat exchanger 10 and its configured indoor fan 11, a molecular sieve oxygen generator 9, a water pump 17, and an air valve 12.

[0030] The first-stage compressor 2 and the second-stage compressor 6 are both high-speed centrifugal compressors, and are driven independently; the expander 15 is a high-speed turbine expander, and is driven independently, or the expander 15 and the second-stage compressor 6 are coaxially driven.

[0031] The air valve 12 is provided between the personnel cabin and the equipment cabin, and the temperature requirements of the personnel cabin and the equipment cabin are matched by adjusting the opening and closing of the air valve 12 .

[0032] The outdoor heat exchanger 4 and the outdoor fan 3 configured therewith are arranged outside the cabin, and the indoor heat exchanger 10 and the indoor fan 11 configured therewith are arranged inside the personnel cabin.

[0033] The inlet of the first-stage compressor 2 is connected to the outside of the cabin through the air filter 1. The inlet of the first-stage compressor 2 is also connected to a valve port of the 3# three-way valve 19 through a pipeline. The inlet of the first-stage compressor 2 is connected to the outside of the cabin and the 3# three-way valve 19 at the same time. The connection to the outside of the cabin realizes the fresh air compression and refrigeration cycle, and the connection to the 3# three-way valve 19 realizes the indoor circulating air compression cycle and the boost cycle. Thus, the first-stage compressor 2 introduces fresh air from outside the cabin and the cabin air flowing through the 3# three-way valve 19, and realizes the air compression cycle and boost cycle of the mixed air intake in the cabin by adjusting the opening of the 3# three-way valve 19 between 0 and 100%.

[0034] The outlet of the first-stage compressor 2 is connected to the air side inlet of the 1# heat exchanger 18 through a pipeline, the air side outlet of the 1# heat exchanger 18 is connected to the inlet of the second-stage compressor 6 through a pipeline, and the outlet of the second-stage compressor 6 is connected to the air side inlet of the 2# heat exchanger 7 through a pipeline.

[0035] There are two pipelines at the air side outlet of the 2# heat exchanger 7. The first pipeline at the air side outlet of the 2# heat exchanger is connected to the inlet of the 1# electric regulating valve 8, and the outlet of the 1# electric regulating valve 8 is connected to the inlet of the molecular sieve oxygen generator 9 through a pipeline. The outlet of the molecular sieve oxygen generator 9 leads to the personnel cabin through a pipeline; the second outlet at the air side outlet of the 2# heat exchanger 7 is connected to the inlet of the expander 15 through a pipeline, and the outlet of the expander 15 is connected to one valve port of the 2# three-way valve 13, and the other valve port of the 2# three-way valve 13 leads to the equipment cabin through a pipeline.

[0036] The air outlet of the second heat exchanger 7 is connected to both the first electric regulating valve 8 and the expander 15. Adjusting the opening of the first electric regulating valve 8 controls the flow of compressed air into the molecular sieve oxygen generator 9, further controlling the oxygen output of the system. Furthermore, by adjusting the opening of the second three-way valve 13, the cooling capacity in the equipment compartment can be adjusted steplessly from 0 to 100%.

[0037] The inlet of the 2# electric regulating valve 14 is connected to the cabin exhaust port. The third valve port of the 2# three-way valve 13 and the outlet of the 2# electric regulating valve 14 are connected to the air-side inlet of the 3# heat exchanger 16 through a pipeline. The air-side outlet of the 3# heat exchanger 16 is connected to the other valve port of the 3# three-way valve 19 through a pipeline. The third valve port of the 3# three-way valve 19 leads to the outside of the cabin through a pipeline. The outlet of the water pump 17 is connected to the coolant side inlet of the 1# heat exchanger 18 through a pipeline, and the coolant side outlet of the 1# heat exchanger 18 is connected to the inlet of the 1# three-way valve 5 through a pipeline; the 1# three-way valve 5 has two outlets, and the two outlets of the 1# three-way valve 5 are respectively connected to the inlets of the indoor heat exchanger 10 and the outdoor heat exchanger 4, and the outlets of the indoor heat exchanger 10 and the outdoor heat exchanger 4 are both connected to the coolant side inlet of the 2# heat exchanger 7, and the coolant side outlet of the 2# heat exchanger 7 is connected to the coolant side inlet of the 3# heat exchanger 16 through a pipeline, and the coolant side outlet of the 3# heat exchanger 16 is connected to the inlet of the water pump 17 through a pipeline.

[0038] The outlet of the 1# three-way valve 5 is connected to the inlet of the indoor heat exchanger 10 and the outdoor heat exchanger 4 through pipelines, so as to realize the start and stop of the heating function in the personnel cabin.

[0039] Under the action of water pump 17, the coolant flows through 1# heat exchanger 18, 2# heat exchanger 7, and 3# heat exchanger 16 in sequence, thereby realizing multiple heat recovery, and then flows to outdoor heat exchanger 4 to discharge the heat outside the cabin or flows to indoor heat exchanger 10 to send the heat to the personnel cabin to achieve heating for the personnel.

[0040] This embodiment adopts the reverse Brayton cycle principle with air as the circulation, and the working process is as follows: The normal temperature and pressure air outside the cabin enters the first-stage compressor 2 through the air filter 1, and is compressed in the first stage in the first-stage compressor 2 to become high-temperature medium-pressure air and enter the air side inlet of the 1# heat exchanger 18. After being cooled by the coolant in the 1# heat exchanger 18, it becomes medium-temperature medium-pressure air and is discharged from the air side outlet of the 1# heat exchanger 18 to enter the second-stage compressor 6. After being compressed in the second stage in the second-stage compressor 6, it becomes high-temperature and high-pressure air and enters the air side inlet of the 2# heat exchanger 7. After being cooled by the coolant in the 2# heat exchanger 7, it becomes medium-temperature and high-pressure air and is discharged from the air side outlet of the 2# heat exchanger 7.

[0041] The medium-temperature, high-pressure air discharged from the air-side outlet of heat exchanger 2# 7 is split into two paths. One path of medium-temperature, high-pressure air from heat exchanger 2# 7 enters the molecular sieve oxygen generator 9 in the oxygen production branch circuit via electric regulating valve 1# 8. Oxygen and nitrogen are separated in molecular sieve oxygen generator 9, and the extracted oxygen enters the personnel cabin. The other path of medium-temperature, high-pressure air from heat exchanger 2# 7 enters expander 15 in the main refrigeration circuit. There, it is expanded and reduced in pressure to become atmospheric-pressure, low-temperature air, which then enters three-way valve 2# 13.

[0042] Normal pressure low temperature air enters the equipment cabin through one valve port of the three-way valve 13, and normal pressure low temperature air enters the 3# heat exchanger 16 through the other valve port of the three-way valve 13. After the cold energy is recovered by the 3# heat exchanger 16, it enters the 3# three-way valve 19, and is discharged outside the cabin through the 3# three-way valve 19 or enters the first-stage compressor 2 for air compression cycle.

[0043] The opening degree of the 2# electric regulating valve 14 is adjusted according to the pressure requirements of the personnel cabin and the equipment cabin, and the opening degree of the air valve 12 is adjusted according to the temperature requirements of the personnel cabin and the equipment cabin to complete the air compression cycle.

[0044] The low-temperature coolant that has released heat from the outdoor heat exchanger 4 or the indoor heat exchanger 10 enters the coolant side inlet of the 2# heat exchanger 7, completes heat exchange with the high-temperature and high-pressure air formed by the secondary compressor 6 in the 2# heat exchanger 7, and becomes high-temperature coolant. The high-temperature coolant is discharged from the coolant side outlet of the 2# heat exchanger 7 to the 3# heat exchanger 16, completes heat exchange with the exhaust gas in the equipment cabin in the 3# heat exchanger 16, and becomes medium-temperature coolant after cold recovery. The medium-temperature coolant flows out from the coolant side outlet of the 3# heat exchanger 16 to the water pump 17, and then enters the 1# heat exchanger 18 after being driven by the water pump 17. In the 1# heat exchanger 18, the coolant completes heat exchange with the medium-pressure high-temperature air that has passed through the first-stage compressor 2 and becomes high-temperature coolant. The high-temperature coolant enters the indoor heat exchanger 10 or the outdoor heat exchanger 4 through the 1# three-way valve 5. In the indoor heat exchanger 10 or the outdoor heat exchanger 4, the high-temperature coolant releases heat through forced convection with the air through the corresponding indoor fan 11 or outdoor fan 3, and then re-enters the 2# heat exchanger 7 to complete the coolant heat exchange cycle.

[0045] Figure 2 This is a diagram of the working area division of this embodiment. The horizontal axis in the figure represents the change in ambient temperature, and the vertical axis represents the change in altitude. By utilizing the different functional modes of the present invention, six typical working areas are formed: Area A (personnel cabin heating + equipment cabin cooling): When the ambient temperature is -40℃≤<10℃, and the altitude is 0m≤<3000m, the air valve 12 is closed, the outlet of the 1# three-way valve 5 is switched to the indoor heat exchanger, and the personnel cabin heating function is turned on; the 1# electric regulating valve 8 is closed, the oxygen production function is not turned on, the 2# three-way valve 13 is switched to the indoor air supply pipe, the 2# electric regulating valve 14 is opened, and the 3# three-way valve 19 is switched to connect with the inlet of the first-stage compressor 2, and the circulating air compression refrigeration function in the equipment cabin is turned on.

[0046] Zone B (personnel cabin heating + personnel cabin oxygen production + equipment cabin cooling): When the ambient temperature is -40°C ≤ ambient temperature < 10°C and the altitude is 3000m ≤ ≤ 5500m, the air valve 12 is closed, the outlet of the 1# three-way valve 5 is switched to the indoor heat exchanger, and the personnel cabin heating function is enabled; the 1# electric regulating valve 8 is opened, the oxygen production function is enabled, the 2# three-way valve 13 is switched to the indoor air supply duct, the 2# electric regulating valve 14 is opened, and the 3# three-way valve 19 is switched to the cabin exhaust duct (opening degree 0-100%), and the equipment fresh air (mixed air) circulating air compression refrigeration function is enabled.

[0047] Zone C (oxygen production in personnel cabin + cooling in equipment cabin): When the ambient temperature is 10°C ≤ < 35°C and the altitude is 3000m ≤ ≤ 5500m, air valve 12 is closed, the outlet of 1# three-way valve 5 is switched to the outdoor heat exchanger, and the heating function of the personnel cabin is turned off; 1# electric regulating valve 8 is opened, the oxygen production function is turned on, 2# three-way valve 13 is switched to the indoor air supply duct, 2# electric regulating valve 14 is opened, and 3# three-way valve 19 is switched to the outdoor exhaust duct (opening degree 0-100%), and the equipment fresh air (mixed air) circulating air compression refrigeration function is turned on.

[0048] Zone D (personnel cabin cooling + personnel cabin oxygen production + equipment cabin cooling): When the ambient temperature is 35°C ≤ ≤ 55°C and the altitude is 3000m ≤ ≤ 5500m, the air valve 12 opens (opening degree 0-100%), the outlet of the 1# three-way valve 5 is switched to the outdoor heat exchanger, and the personnel cabin cooling function is enabled; the 1# electric regulating valve 8 opens, the oxygen production function is enabled, the 2# three-way valve 13 is switched to the indoor air supply duct, the 2# electric regulating valve 14 is opened, and the 3# three-way valve 19 is switched to the outdoor exhaust duct (opening degree 0-100%), and the equipment fresh air (mixed air) circulating air compression refrigeration function is enabled.

[0049] Zone E (personnel cabin cooling + equipment cabin cooling): When the ambient temperature is 35°C ≤ ≤ 55°C and the altitude is 0m ≤ < 3000m, the air valve 12 opens (opening degree 0-100%), the outlet of the 1# three-way valve 5 is switched to the outdoor heat exchanger, and the personnel cabin cooling function is turned on; the 1# electric regulating valve 8 is closed, the oxygen production function is turned off, the 2# three-way valve 13 is switched to the indoor air supply duct, the 2# electric regulating valve 14 is opened, and the 3# three-way valve 19 is switched to the outdoor exhaust duct (opening degree 0-100%), and the equipment fresh air (mixed air) circulating air compression refrigeration function is turned on.

[0050] Area F (equipment cabin cooling): When the ambient temperature is 10℃≤<35℃, and the altitude is 0m≤≤3000m, the air valve 12 is closed, the outlet of the 1# three-way valve 5 is switched to the outdoor heat exchanger, and the personnel cabin cooling function is turned off; the 1# electric regulating valve 8 is closed, the oxygen production function is turned off, the 2# three-way valve 13 is switched to the indoor air supply pipe, the 2# electric regulating valve 14 is opened, and the 3# three-way valve 19 is switched to the inlet of the first-stage compressor 2, turning on the circulating air compression refrigeration function in the equipment cabin.

[0051] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner unless there is any contradiction. Such combinations should also be regarded as the contents disclosed in this disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0052] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by those skilled in the art should fall within the scope of protection of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A comprehensive environmental control system for all working conditions, characterized in that: It includes a first-stage compressor (2), a second-stage compressor (6), an expander (15), a 1# three-way valve (5), a 2# three-way valve (13), a 3# three-way valve (19), a 1# electric regulating valve (8), a 2# electric regulating valve (14), a 1# heat exchanger (18), a 2# heat exchanger (7), a 3# heat exchanger (16), an outdoor heat exchanger (4) and an outdoor fan (3) configured therewith, an indoor heat exchanger (10) and an indoor fan (11) configured therewith, a molecular sieve oxygen generator (9), and a water pump (17); The inlet of the first-stage compressor (2) is connected to the outside of the cabin. The inlet of the first-stage compressor (2) is also connected to a valve port of the 3# three-way valve (19) through a pipeline, thereby allowing the first-stage compressor (2) to take in fresh air from the outside of the cabin and air in the cabin that flows through the 3# three-way valve (19); the outlet of the first-stage compressor (2) is connected to the air side inlet of the 1# heat exchanger (18) through a pipeline, the air side outlet of the 1# heat exchanger (18) is connected to the inlet of the second-stage compressor (6) through a pipeline, and the outlet of the second-stage compressor (6) is connected to the air side inlet of the 2# heat exchanger (7) through a pipeline; The air side outlet of the 2# heat exchanger (7) has two pipelines. The first pipeline of the air side outlet of the 2# heat exchanger is connected to the inlet of the 1# electric regulating valve (8). The outlet of the 1# electric regulating valve (8) is connected to the inlet of the molecular sieve oxygen generator (9) through a pipeline. The outlet of the molecular sieve oxygen generator (9) leads to the personnel cabin through a pipeline. The second outlet of the air side outlet of the 2# heat exchanger (7) is connected to the inlet of the expander (15) through a pipeline. The outlet of the expander (15) is connected to one valve port of the 2# three-way valve (13). The other valve port of the 2# three-way valve (13) leads to the equipment cabin through a pipeline. The inlet of the 2# electric regulating valve (14) is connected to the exhaust port in the cabin, the third valve port of the 2# three-way valve (13) and the outlet of the 2# electric regulating valve (14) are connected to the air side inlet of the 3# heat exchanger (16) through a pipeline, the air side outlet of the 3# heat exchanger (16) is connected to the other valve port of the 3# three-way valve (19) through a pipeline, and the third valve port of the 3# three-way valve (19) is connected to the outside of the cabin through a pipeline; The outlet of the water pump (17) is connected to the cooling liquid side inlet of the 1# heat exchanger (18) through a pipeline, and the cooling liquid side outlet of the 1# heat exchanger (18) is connected to the inlet of the 1# three-way valve (5) through a pipeline; the 1# three-way valve (5) has two outlets, and the two outlets of the 1# three-way valve (5) are respectively connected to the inlets of the indoor heat exchanger (10) and the outdoor heat exchanger (4), and the outlets of the indoor heat exchanger (10) and the outdoor heat exchanger (4) are both connected to the cooling liquid side inlet of the 2# heat exchanger (7), and the cooling liquid side outlet of the 2# heat exchanger (7) is connected to the cooling liquid side inlet of the 3# heat exchanger (16) through a pipeline, and the cooling liquid side outlet of the 3# heat exchanger (16) is connected to the inlet of the water pump (17) through a pipeline.

2. The all-conditions comprehensive environmental control system according to claim 1, characterized in that: The inlet of the first-stage compressor (2) is simultaneously connected to the outside of the cabin and the 3# three-way valve (19). The inlet of the first-stage compressor (2) is connected to the outside of the cabin to realize the fresh air compression refrigeration cycle, and the inlet of the first-stage compressor (2) is connected to the 3# three-way valve (19) to realize the indoor circulating air compression cycle and the pressurization cycle. The air compression cycle and the pressurization cycle of the mixed air in the cabin are realized by adjusting the opening of the 3# three-way valve (19) between 0 and 100%.

3. The comprehensive environmental control system for all working conditions according to claim 1, characterized in that: The air side outlet of the 2# heat exchanger (7) is connected to the 1# electric regulating valve (8) and the expander (15) at the same time. By adjusting the opening of the 1# electric regulating valve (8), the flow rate of compressed air entering the molecular sieve oxygen generator (9) is controlled, and the oxygen production output by the system is further controlled.

4. The comprehensive environmental control system for all working conditions according to claim 1, characterized in that: The first-stage compressor (2) and the second-stage compressor (6) are both high-speed centrifugal compressors, and the first-stage compressor (2) and the second-stage compressor (6) are independently driven; the expander (15) is a high-speed turbine expander, and the expander (15) is independently driven, or the expander (15) and the second-stage compressor (6) are coaxially driven.

5. The comprehensive environmental control system for all working conditions according to claim 1, characterized in that: By adjusting the opening of the 2# three-way valve (13), the cooling capacity in the equipment compartment can be adjusted from 0 to 100% steplessly.

6. The comprehensive environmental control system for all working conditions according to claim 1, characterized in that: The outlet of the 1# three-way valve (5) is connected to the inlets of the indoor heat exchanger (10) and the outdoor heat exchanger (4) through pipelines, respectively, to realize the start and stop of the heating function in the personnel cabin.

7. The comprehensive environmental control system for all working conditions according to claim 1, characterized in that: The coolant flows through the 1# heat exchanger (18), the 2# heat exchanger (7), and the 3# heat exchanger (16) in sequence under the action of the water pump (17), thereby realizing multiple heat recovery, and then flows to the outdoor heat exchanger (4) to discharge the heat outside the cabin or flows to the indoor heat exchanger (10) to send the heat to the personnel cabin to achieve heating for the personnel.

8. The comprehensive environmental control system for all working conditions according to claim 1, characterized in that: An air valve (12) is provided between the personnel cabin and the equipment cabin, and the temperature requirements of the personnel cabin and the equipment cabin are matched by adjusting the opening and closing of the air valve (12).

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