Pressurization and temperature coupling controlled micro-pressure cabin

Abstract

The invention discloses a pressurization and temperature coupling control micro-pressure cabin. The micro-pressure cabin comprises a pressurization unit, a heat exchange unit, a mixing unit, a temperature adjusting unit, a sealed cabin, an exhaust unit and a control unit; the pressurizing unit, the heat exchange unit, the mixing unit, the temperature adjusting unit, the sealed cabin and the exhaust unit are connected in sequence; the pressurizing unit, the mixing unit, the temperature adjusting unit and the sealed cabin are respectively connected with the control unit; the sealed cabin is provided with an air inlet, an air outlet and an air return port; an air return port of the sealed cabin is connected with the mixing unit. The temperature in the cabin is adjusted through compression heat; fresh air and cabin return air are mixed in a mixing chamber, the temperature of mixed gas is adjusted by adjusting the fresh air ratio, and the mixed gas is purified and subjected to carbon dioxide removal treatment; when the temperature in the cabin is difficult to adjust by adjusting the fresh air ratio, the mixed gas is subjected to temperature adjusting treatment through a temperature adjusting unit; compared with an independent air conditioning device arranged in the cabin, pressurization and temperature coupling control is achieved, and more energy conservation and high efficiency are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of plateau oxygen supply, and particularly relates to a micro-pressure cabin with coupled control of pressurization and temperature. Background Art

[0002] The plateau environment is characterized by low air pressure, hypoxia, high cold, high radiation, large temperature difference between day and night, etc. The special high-altitude hypoxia environment has complex effects on the human body. It can lead to low work efficiency at least, and physical function degradation at worst, seriously endangering physical and mental health. To ensure the life safety and physical health of people in plateau areas, it is necessary to control the oxygen partial pressure in the cabin. In addition, to meet the comfort requirements of people in the cabin, it is necessary to control the temperature in the cabin. The input of fresh air and oxygen-rich gas causes complex mass exchange and energy exchange; the high solar radiation intensity in plateau areas, the environmental changes caused by the large temperature difference between morning and evening and the movement of the cabin will also cause changes in heat load; for a mobile cabin, the convective heat transfer coefficients on the outer surface of the cabin are also different in the stationary state and the moving state. Therefore, a temperature control system is needed to adjust the temperature in the cabin to keep it within a comfortable range.

[0003] Existing pressurized cabins can create an oxygen-rich environment at high altitudes through pressurization, but the temperature regulation depends on an independently set air conditioner, specifically including installing a split air conditioner in the cabin or placing the cabin in an air-conditioned room. Both of the above temperature regulation schemes require a large amount of additional electric energy consumption, and reduce the portability and flexibility of the cabin. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a micro-pressure cabin with coupled control of pressurization and temperature, including: a pressurization unit, a heat exchange unit, a mixing unit, a temperature regulation unit, a sealed cabin, an exhaust unit and a control unit;

[0005] The pressurization unit, the heat exchange unit, the mixing unit, the temperature regulation unit, the sealed cabin and the exhaust unit are connected in sequence;

[0006] The pressurization unit, the mixing unit, the temperature regulation unit and the sealed cabin are respectively connected to the control unit;

[0007] The sealed cabin is provided with an air inlet, an air outlet and a return air outlet;

[0008] The return air outlet of the sealed cabin is connected to the mixing unit.

[0009] Furthermore, the pressurization unit includes a pressurization fan and a gas storage tank;

[0010] The pressurization fan is connected to the gas storage tank;

[0011] The pressurization fan is fixedly installed on one side of the sealed cabin.

[0012] Furthermore, the heat exchange unit includes a heat exchanger and an adiabatic pipeline;

[0013] The heat exchanger is connected in parallel with the adiabatic pipeline;

[0014] A first valve is provided on the adiabatic pipeline.

[0015] Furthermore, the mixing unit includes a pressure regulating valve, a flow regulating valve, a first flowmeter, a first temperature measuring instrument, a first pressure measuring instrument, a mixing chamber and a circulation pump;

[0016] The pressure regulating valve, the flow regulating valve, the first flowmeter, the first temperature measuring instrument, the first pressure measuring instrument and the mixing chamber are connected in sequence;

[0017] The return air outlet of the sealed cabin is connected to the mixing chamber through a circulation pump.

[0018] Furthermore, the temperature regulating unit includes a refrigeration device, a heating device, a second valve and a third valve;

[0019] The refrigeration device is connected in parallel with the heating device;

[0020] A second valve is provided between the refrigeration device and the mixing unit;

[0021] A third valve is provided between the heating device and the mixing unit.

[0022] Furthermore, it further includes: a filtration and purification device;

[0023] The filtration and purification device is provided between the sealed cabin and the temperature regulating unit.

[0024] Furthermore, it further includes: a fourth valve, a second temperature measuring instrument and a second flowmeter;

[0025] The fourth valve, the second temperature measuring instrument and the second flowmeter are all provided on the pipeline between the air inlet of the sealed cabin and the filtration and purification device.

[0026] Furthermore, it further includes: a third temperature measuring instrument, a second pressure measuring instrument and an oxygen measuring instrument;

[0027] The third temperature measuring instrument, the second pressure measuring instrument and the oxygen measuring instrument are all provided inside the sealed cabin.

[0028] Furthermore, the exhaust unit includes a fifth valve and an expansion valve;

[0029] One end of the fifth valve is connected to the air outlet of the sealed cabin, and the other end is connected to the expansion valve.

[0030] Furthermore, it further includes: an emergency exhaust valve;

[0031] The emergency exhaust valve is provided inside the sealed cabin.

[0032] Compared with the prior art, the embodiments of the present invention have at least the following advantages: A micro-pressure cabin with coupled control of pressurization and temperature according to the present invention can make full use of compression heat to adjust the temperature inside the cabin; fresh air and the return air of the cabin are mixed in a mixing chamber, and the temperature of the mixed gas is adjusted by adjusting the fresh air ratio, and the mixed gas is purified and carbon dioxide is removed; when it is difficult to adjust the temperature inside the cabin by adjusting the fresh air ratio, the temperature of the mixed gas is further adjusted by a temperature adjustment unit; compared with setting an independent air-conditioning device inside the cabin, the present invention realizes the coupled control of pressurization and temperature, and is more energy-saving and efficient.

[0033] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 A schematic diagram of a micro-pressure cabin with coupled control of pressurization and temperature according to an embodiment of the present invention is shown.

[0036] Reference numerals: 1, pressurization fan; 2, gas storage tank; 3, heat exchanger; 4, first valve; 5, pressure regulating valve; 6, flow regulating valve; 7, first flowmeter; 8, first temperature measuring instrument; 9, first pressure measuring instrument; 10, mixing chamber; 11, second valve; 12, third valve; 13, refrigeration device; 14, heating device; 15, filtration and purification device; 16, fourth valve; 17, second temperature measuring instrument; 18, second flowmeter; 19, sealed cabin; 20, third temperature measuring instrument; 21, second pressure measuring instrument; 22, oxygen measuring instrument; 23, circulation pump; 24, fifth valve; 25, expansion valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0038] Figure 1 Shows a schematic diagram of a micro-pressure cabin with coupled pressurization and temperature control according to an embodiment of the present invention. As Figure 1 shown, a micro-pressure cabin with coupled pressurization and temperature control proposed by the present invention includes: a pressurization unit, a heat exchange unit, a mixing unit, a temperature regulation unit, a sealed cabin 19, an exhaust unit, and a control unit;

[0039] The pressurization unit, heat exchange unit, mixing unit, temperature regulation unit, sealed cabin 19, and exhaust unit are connected in sequence;

[0040] The pressurization unit, mixing unit, temperature regulation unit, and sealed cabin 19 are respectively connected to the control unit;

[0041] The sealed cabin 19 is provided with an air inlet, an air outlet, and a return air outlet;

[0042] The return air outlet of the sealed cabin 19 is connected to the mixing unit.

[0043] The control unit is electrically connected to a pressurization fan 1, a circulation pump 23, a temperature measuring instrument, a pressure measuring instrument, a flow meter, a refrigeration device 13, a heating device 14, a pressure regulating valve 5, a flow regulating valve 6, and a valve respectively.

[0044] The function of coupled pressurization and temperature control is to create a suitable atmospheric environment for people to live and work in the sealed cabin. Pressurization and oxygen supply rely on the pressurization fan 1 or a supercharger to comprehensively increase the air pressure in the cabin with high pressure resistance and good airtightness. Due to the temperature rise generated during the pressurization process, the gas temperature at the outlet of the pressurization fan 1 is relatively high; at the same time, due to the cold characteristics of the high-altitude area, the ambient air temperature is relatively low. Therefore, the refrigeration or heating working conditions can be selected by controlling whether the gas at the outlet of the pressurization fan 1 enters the heat exchanger 3 for heat exchange with the environment; at the same time, the temperature of the mixed gas can also be adjusted by adjusting the fresh air volume to achieve the effect of controlling the cabin temperature.

[0045] As Figure 1As shown, the sealed cabin 19 is used to provide an oxygen-rich environment for personnel to rest and recover. The sealed cabin 19 is provided with an air inlet, an air outlet and a return air outlet. The exhaust air flowing out from the air outlet is adjusted by the fifth valve 24. The low-pressure and low-temperature gas obtained by reducing the pressure and lowering the temperature through the expansion valve 25 is used for the heat dissipation of equipment such as the motor of the booster fan 1, and then is discharged to the environment. The return air flowing out from the return air outlet is connected to the mixing chamber 10 through the circulation pump 23 and mixed with the fresh air entering from the booster fan 1. The original intention and innovation of the present invention is to achieve energy conservation and environmental protection on the basis of ensuring life safety and physical health. However, overheating of the motor will shorten the service life of the motor, reduce the equipment efficiency, increase the system energy consumption, and even cause failures or fires in severe cases. Therefore, in the design process, the solution for motor heat dissipation is fully considered, and the cold quantity generated by reducing the pressure of the high-pressure air in the cabin relative to the environment through the expansion valve 25 is fully utilized to provide a good heat dissipation environment for the motor.

[0046] The sealed cabin 19 forms an expected oxygen-rich environment according to the instructions of the control unit. The control unit controls the environmental parameters in the sealed cabin 19 in real time according to actual needs. The environmental parameters inside the sealed cabin 19 are monitored in real time by the third temperature measuring instrument 20, the second pressure measuring instrument 21 and the oxygen measuring instrument 22, and the detection results are fed back to the control unit. The control unit controls the operation of the micro-pressure cabin according to the detection results. Here, the oxygen-rich environment refers to increasing the partial pressure of oxygen in the cabin by increasing the total pressure of the air in the cabin, rather than increasing the volume fraction of oxygen by introducing oxygen into the cabin. Therefore, the oxygen concentration shall not be lower than 21%, that is, the air oxygen concentration; generally, the partial pressure of oxygen should make the equivalent altitude in the cabin below 2000m, and specific reference can be made to the physiological requirements of the cabin pressure system in GJB 646-88.

[0047] In some embodiments, the boosting unit includes a booster fan 1 and a gas storage tank 2;

[0048] The booster fan 1 is connected to the gas storage tank 2;

[0049] The booster fan 1 is fixedly installed on one side of the sealed cabin 19.

[0050] In some embodiments, the heat exchange unit includes a heat exchanger 3 and an adiabatic pipeline;

[0051] The heat exchanger 3 is connected in parallel with the adiabatic pipeline;

[0052] The first valve 4 is provided on the adiabatic pipeline.

[0053] In some embodiments, the mixing unit includes a pressure regulating valve 5, a flow regulating valve 6, a first flow meter 7, a first temperature measuring instrument 8, a first pressure measuring instrument 9, a mixing chamber 10 and a circulation pump 23;

[0054] The pressure regulating valve 5, flow regulating valve 6, first flowmeter 7, first temperature measuring instrument 8, first pressure measuring instrument 9, and mixing chamber 10 are connected in sequence;

[0055] The return air outlet of the sealed cabin 19 is connected to the mixing chamber 10 through a circulation pump 23.

[0056] The pressure regulating valve 5 is used to regulate the pressure of the fresh air;

[0057] The flow regulating valve 6 is used to regulate the flow rate of the fresh air;

[0058] The first flowmeter 7 is used to monitor the flow rate of the fresh air;

[0059] The first temperature measuring instrument 8 is used to monitor the temperature of the fresh air;

[0060] The first pressure measuring instrument 9 is used to monitor the pressure of the fresh air;

[0061] The mixing chamber 10 is used to mix the return air in the cabin and the fresh air;

[0062] The circulation pump 23 is used to send the return air in the cabin into the mixing chamber 10.

[0063] In some embodiments, the temperature regulating unit includes a refrigeration device 13, a heating device 14, a second valve 11, and a third valve 12;

[0064] The refrigeration device 13 and the heating device 14 are connected in parallel;

[0065] A second valve 11 is provided between the refrigeration device 13 and the mixing unit;

[0066] A third valve 12 is provided between the heating device 14 and the mixing unit.

[0067] In some embodiments, the micro-pressure cabin with pressurization and temperature coupling control further includes: a filtration and purification device 15;

[0068] The filtration and purification device 15 is provided between the sealed cabin 19 and the temperature regulating unit.

[0069] In some embodiments, the micro-pressure cabin with pressurization and temperature coupling control further includes: a fourth valve 16, a second temperature measuring instrument 17, and a second flowmeter 18;

[0070] The fourth valve 16, the second temperature measuring instrument 17, and the second flowmeter 18 are all provided on the pipeline between the air inlet of the sealed cabin 19 and the filtration and purification device 15.

[0071] In some embodiments, the micro-pressure cabin with pressurization and temperature coupling control further includes: a third temperature measuring instrument 20, a second pressure measuring instrument 21, and an oxygen measuring instrument 22;

[0072] The third thermometer 20, the second pressure gauge 21, and the oxygen analyzer 22 are all arranged inside the sealed cabin 19.

[0073] In some embodiments, the exhaust unit includes a fifth valve 24 and an expansion valve 25;

[0074] One end of the fifth valve 24 is connected to the air outlet of the sealed cabin 19, and the other end is connected to the expansion valve 25.

[0075] Specifically, a pressurizing fan 1 is fixed on one side outside the sealed cabin 19, and a pressurizing unit, a heat exchange unit, a mixing unit, a temperature regulating unit, and an exhaust unit are arranged outside. The pressurizing fan 1 receives the control instruction issued by the control unit and compresses air according to the control instruction; the outlet of the pressurizing fan 1 is connected to an air storage tank 2, the outlet of the air storage tank 2 is connected to a heat exchanger 3, both ends of the heat exchanger 3 are short-circuited by a section of adiabatic pipeline, and a first valve 4 is arranged on the adiabatic pipeline. The outlet of the heat exchanger 3 is connected to a mixing chamber 10, and a pressure regulating valve 5, a flow regulating valve 6, a first flowmeter 7, a first thermometer 8, and a first pressure gauge 9 are sequentially installed on the pipeline between the inlet of the mixing chamber 10 and the heat exchanger 3. Among them, the heat exchanger 3 is a compact heat exchanger, such as a plate fin heat exchanger. The adiabatic pipeline is composed of a pipeline, an adiabatic layer, and an outer shell. The pipeline is made of stainless steel, the outside of the stainless steel pipeline is the adiabatic layer, the adiabatic layer is made of glass fiber cotton, and the outermost layer is a black PVC sheath.

[0076] The outlet of the mixing chamber 10 is connected to the temperature regulating unit. The interior of the temperature regulating unit is divided into two paths. One path is connected to a heating device 14 through a third valve 12, and the other path is connected to a refrigerating device 13 through a second valve 11. When it is difficult to adjust the temperature inside the sealed cabin 19 by adjusting the fresh air ratio (the ratio of the fresh air volume passing through the heat exchanger 3 or the adiabatic pipeline to the air supply volume. Among them, the air supply is composed of fresh air and return air, and the fresh air ratio is the ratio of the fresh air volume to the air supply volume.), the mixed gas is further subjected to temperature regulation treatment through the temperature regulating unit. Under the heating condition, the third valve 12 is opened and the second valve 11 is closed, so that the mixed gas passes through the heating device 14; under the refrigerating condition, the third valve 12 is closed and the second valve 11 is opened, so that the mixed gas passes through the refrigerating device 13. The refrigerating device 13 adopts vapor compression refrigeration or thermoelectric refrigeration, and the heating device 14 adopts a heat pump or electric heating. Different from the prior art in which an independent temperature regulating system is arranged in the cabin, the temperature regulating unit of the present invention mainly relies on adjusting the fresh air volume to achieve temperature regulation, and the fresh air volume is closely related to the control of the cabin pressure. Therefore, the control of the temperature regulating unit and the pressurizing unit is coupled. The temperature regulating device connected here plays an auxiliary role, so that the cabin can still ensure a suitable temperature inside the cabin under the conditions of extremely high or extremely low air temperatures.

[0077] The temperature control unit is connected to the filtration and purification device 15. The filtration and purification device 15 is used to remove impurities and carbon dioxide from the mixed gas. A fourth valve 16, a second temperature measuring instrument 17, and a second flowmeter 18 are sequentially installed at the outlet of the filtration and purification device 15. The second flowmeter 18 is connected to the air inlet of the sealed chamber 19. For the mixed gas passing through the filtration and purification device 15, the second pressure measuring instrument 17 is used to monitor the temperature of the mixed gas in real time, and the second flowmeter 18 is used to monitor the flow rate of the mixed gas in real time, and the data is transmitted to the control unit, facilitating the control unit to control the temperature and flow rate of the mixed gas. The filtration and purification device 15 adopts an activated carbon filter, which is composed of a composite of activated carbon fibers and filter cotton, and can effectively filter dust, odors, and organic pollutants in the air.

[0078] In some embodiments, the micro-pressure chamber with coupled control of pressurization and temperature further includes: a solar panel and a storage battery;

[0079] The solar panel is connected to the storage battery.

[0080] The storage battery stores the electric energy generated by the solar panel and supplies power to each component of the micro-pressure chamber, enabling the micro-pressure chamber to operate in areas without a power grid or in remote areas, expanding the usage range of the micro-pressure chamber and saving resources.

[0081] In a preferred embodiment, the filtration and purification device 15 has the functions of sterilization and disinfection, filtering dust impurities, and removing carbon dioxide.

[0082] In a preferred embodiment, the low-temperature and low-pressure gas at the outlet of the expansion valve 25 is used for motor cooling.

[0083] In some embodiments, an emergency exhaust valve is provided inside the sealed chamber 19.

[0084] In some embodiments, a low-oxygen warning device is additionally provided inside the sealed chamber 19.

[0085] In some embodiments, for convenient control during use, a display screen is additionally provided inside the sealed chamber 19 for displaying the environmental parameters monitored in real time by the second pressure measuring instrument 21 and the third temperature measuring instrument 20.

[0086] In some embodiments, to solve the problem of dry climate in plateau areas, a humidifier is additionally provided inside the sealed chamber 19.

[0087] In some embodiments, the sealed chamber 19 is additionally provided with a glass window and lighting equipment.

[0088] Pressurization and temperature coupling means that while pressurizing the cabin, the heat generated by air compression is fully utilized to adjust the temperature inside the cabin. The system operates as follows: The outside air is pressurized and heated by the pressurization fan 1 and then enters the gas storage tank 2. The gas storage tank 2 is connected to the air heat exchanger 3, and the air heat exchanger 3 is short-circuited by an adiabatic pipeline with a valve. The high-temperature and high-pressure air can either dissipate heat through the heat exchanger 3 or maintain a high temperature through the adiabatic pipeline. The gas passing through the heat exchanger 3 or the adiabatic pipeline forms a mixed gas with the return air in the mixing chamber 10, and after being filtered, purified, and reheated, it is sent back into the cabin. The environmental parameters inside the cabin are monitored by the third temperature sensor 20, the second pressure sensor 21, and the oxygen sensor 22 and fed back to the control unit. The control unit issues commands to control the operation of the pressurization fan 1, the flow regulating valve 6, the pressure regulating valve 5, and the temperature regulating unit to maintain or adjust the cabin environment.

[0089] Specifically: Set the internal environmental parameters of the sealed cabin 19 body through the control unit and control the overall operation of the micro-pressure cabin. Through the cooperation among the pressurization fan 1, the flow regulating valve 6, the pressure regulating valve 5, the heating device 14, the refrigeration device 13, the circulation pump 23, and the fifth valve 24, the internal environmental parameters of the sealed cabin 19 body reach the set values. And the internal air pressure of the sealed cabin 19 body is monitored in real time by the second pressure sensor 21 (According to the different altitudes where the cabin is located, the relative pressure inside the cabin also varies. Generally, the air pressure inside the cabin should make the equivalent altitude of the cabin environment below 2000m. For details, refer to the physiological requirements of the cabin pressure system in GJB 646-88). The oxygen concentration inside the sealed cabin 19 is monitored in real time by the oxygen sensor 22 (the oxygen concentration shall not be lower than 21%), and the internal air temperature of the sealed cabin 19 is monitored in real time by the third temperature sensor 20 (the air temperature inside the cabin should be controlled within the range of 18°C to 26°C), and then transmitted to the control unit. The control unit controls the operation of the pressurization fan 1, the flow regulating valve 6, the heating device 14, the refrigeration device 13, and the circulation pump 23 according to the parameters monitored in real time, so as to maintain or adjust the internal environment of the sealed cabin 19. Under the heating condition, open the third valve 12 and close the second valve 11 to make the mixed gas pass through the heating device 14; under the refrigeration condition, close the third valve 12 and open the second valve 11 to make the mixed gas pass through the refrigeration device 13. When the carbon dioxide concentration is too high (the carbon dioxide concentration shall not be higher than 0.15%), adjust the fifth valve 24 of the exhaust vent to a larger opening.

[0090] The working process is as follows:

[0091] 1. According to the required refrigeration or heating mode, open or close the corresponding stop valve;

[0092] 2. Start the pressurization fan 1 and the temperature regulating unit. The high-temperature and high-pressure gas provided by the pressurization fan 1 directly enters the mixing chamber 10 to mix with the return air, or enters the mixing chamber 10 to mix with the return air after passing through the heat exchanger 3;

[0093] 3. The mixed gas is introduced into the temperature control unit and the filtration and purification device 15, and after filtering impurities and removing carbon dioxide, clean gas is obtained.

[0094] 4. The mixed gas is sent into the interior of the sealed cabin 19 through the air inlet.

[0095] 5. The control unit receives the in-cabin environment parameters monitored in real time by the second pressure gauge 21 and the oxygen analyzer 22, and controls the operation of the booster fan 1, the flow regulating valve 6, the pressure regulating valve 5 and other various valves based on this.

[0096] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A micro-pressure cabin with coupled control of pressurization and temperature, characterized in that, it includes: a pressurization unit, a heat exchange unit, a mixing unit, a temperature regulation unit, a sealed cabin (19), an exhaust unit and a control unit; the pressurization unit, the heat exchange unit, the mixing unit, the temperature regulation unit, the sealed cabin (19) and the exhaust unit are connected in sequence; the pressurization unit, the mixing unit, the temperature regulation unit and the sealed cabin (19) are respectively connected to the control unit; the sealed cabin (19) is provided with an air inlet, an air outlet and a return air outlet; the return air outlet of the sealed cabin (19) is connected to the mixing unit.

2. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, the pressurization unit includes a pressurization fan (1) and a gas storage tank (2); the pressurization fan (1) and the gas storage tank (2) are connected; the pressurization fan (1) is fixedly installed on one side of the sealed cabin (19).

3. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, the heat exchange unit includes a heat exchanger (3) and an adiabatic pipeline; the heat exchanger (3) is connected in parallel with the adiabatic pipeline; a first valve (4) is provided on the adiabatic pipeline.

4. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, the mixing unit includes a pressure regulating valve (5), a flow regulating valve (6), a first flowmeter (7), a first temperature measuring instrument (8), a first pressure measuring instrument (9), a mixing chamber (10) and a circulation pump (23); the pressure regulating valve (5), the flow regulating valve (6), the first flowmeter (7), the first temperature measuring instrument (8), the first pressure measuring instrument (9), and the mixing chamber (10) are connected in sequence; the return air outlet of the sealed cabin (19) is connected to the mixing chamber (10) through the circulation pump (23).

5. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, the temperature regulation unit includes a refrigeration device (13), a heating device (14), a second valve (11) and a third valve (12); the refrigeration device (13) is connected in parallel with the heating device (14); a second valve (11) is provided between the refrigeration device (13) and the mixing unit; a third valve (12) is provided between the heating device (14) and the mixing unit.

6. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, it further includes: a filtration and purification device (15); the filtration and purification device (15) is arranged between the sealed cabin (19) and the temperature regulation unit.

7. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 6, characterized in that, it further includes: a fourth valve (16), a second temperature measuring instrument (17) and a second flowmeter (18); the fourth valve (16), the second temperature measuring instrument (17) and the second flowmeter (18) are all arranged on the pipeline between the air inlet of the sealed cabin (19) and the filtration and purification device (15).

8. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, it further includes: a third temperature measuring instrument (20), a second pressure measuring instrument (21) and an oxygen measuring instrument (22); The third temperature measuring instrument (20), the second pressure measuring instrument (21) and the oxygen measuring instrument (22) are all arranged in the sealed cabin (19).

9. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, the exhaust unit includes a fifth valve (24) and an expansion valve (25); one end of the fifth valve (24) is connected to the air outlet of the sealed cabin (19), and the other end is connected to the expansion valve (25).

10. The micro-pressure cabin with coupled control of pressurization and temperature according to claim 1, characterized in that, further comprising: an emergency exhaust valve; the emergency exhaust valve is arranged in the sealed cabin (19).

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