Dual duct air conditioning system with redundancy and vehicle

Abstract

The application discloses a kind of double air ducts mutual redundancy air conditioning system, including corresponding installation in first equipment cabin, second equipment cabin and third equipment cabin first air conditioning unit, second air conditioning unit and electric control cabinet, the top of first equipment cabin is equipped with first air supply air duct and first return air duct, first air supply air duct is communicated with the inner chamber of equipment heat preservation cylinder, the top of second equipment cabin is equipped with second air supply air duct and second return air duct, second air supply air duct is communicated with the inner chamber of equipment heat preservation cylinder, first air supply air duct and second air supply air duct are communicated by equipment cabin top air duct, first return air duct and second return air duct are communicated with outside atmosphere, temperature regulation controller controls first air conditioning unit and second air conditioning unit to provide required temperature and humidity environment for equipment heat preservation cylinder according to the temperature and humidity information of equipment heat preservation cylinder inside collected by temperature and humidity collection module.The application realizes that air conditioning regulation system is uninterrupted and continuously regulated, and reliably provides air conditioning service for equipment heat preservation cylinder.

Description

Technical Field

[0001] This invention relates to the field of temperature and humidity control technology for equipment launching insulation cylinders. More specifically, this invention relates to an air conditioning system and vehicle with dual redundant air ducts. Background Technology

[0002] In the past, high-voltage DC driven air conditioning systems used a single all-return air conditioning system, with one supply air vent and one return air vent installed in each of the delivery tubes. This previous design had three main problems:

[0003] 1. In the heating stage of the air conditioning unit, the power consumption is significantly insufficient under extreme low temperatures, resulting in insufficient heating capacity. 2. The control system controller is typically a single unit, posing a potential single point of failure. 3. If the equipment within a single air conditioning unit malfunctions, the cooling and heating functions of that corresponding duct will fail. If the equipment in two air conditioning units malfunctions simultaneously, all functions will fail.

[0004] Therefore, how to continuously adjust the temperature and humidity environment inside the launch tube to adapt to the constantly changing requirements of temperature and humidity has become a technical problem that urgently needs to be solved and a key focus of research for those skilled in the art. Summary of the Invention

[0005] To address the technical problems existing in the background art, this invention innovatively provides an air conditioning system with dual redundant air ducts, which realizes uninterrupted continuous adjustment of the air conditioning system and reliably provides air conditioning services for the equipment insulation cylinder.

[0006] To achieve the aforementioned technical objectives, this invention discloses a dual-duct redundant air conditioning system, comprising a first air conditioning unit, a second air conditioning unit, and an electrical control cabinet. The first air conditioning unit, the second air conditioning unit, and the electrical control cabinet are respectively installed in a first equipment compartment, a second equipment compartment, and a third equipment compartment. These compartments are sequentially arranged along the axis of the equipment insulation cylinder. The first equipment compartment is located at the front end of the equipment insulation cylinder, and a first supply air duct and a first return air duct are provided above it. The first supply air duct communicates with the inner cavity of the equipment insulation cylinder. The second equipment compartment is located at the rear end of the equipment insulation cylinder. The upper part of the cabin is provided with a second air supply duct and a second air return duct. The second air supply duct is connected to the inner cavity of the equipment insulation cylinder. The first air supply duct and the second air supply duct are connected through the air duct at the top of the equipment cabin. The first air return duct and the second air return duct are both connected to the outside atmosphere. The equipment insulation cylinder is provided with a temperature and humidity acquisition module. The electrical control cabinet is provided with a temperature regulation controller. The temperature regulation controller is electrically connected to the temperature and humidity acquisition module, the first air conditioning unit and the second air conditioning unit. The temperature regulation controller controls the first air conditioning unit and the second air conditioning unit to provide the required temperature and humidity environment for the equipment insulation cylinder based on the temperature and humidity information collected by the temperature and humidity acquisition module inside the equipment insulation cylinder.

[0007] Furthermore, the present invention provides an air conditioning system with redundant dual air ducts, wherein the first air conditioning unit includes a first refrigeration unit and a first heating unit, the first heating unit and the first refrigeration unit share a first supply air duct and a first return air duct, and the second air conditioning unit includes a second refrigeration unit and a second heating unit, the second heating unit and the second refrigeration unit share a second supply air duct and a second return air duct.

[0008] Furthermore, the present invention provides a dual-duct redundant air conditioning system, wherein the first refrigeration unit includes a first main refrigeration unit and a first standby refrigeration unit, and the first heating unit includes a first electric heating component, a first main fuel heater, and a first standby fuel heater. The first electric heating component is connected in series with the first main fuel heater, and the first main fuel heater and the first standby fuel heater are connected in parallel. The second refrigeration unit includes a second main refrigeration unit and a second standby refrigeration unit, and the second heating unit includes a second electric heating component, a second main fuel heater, and a second standby fuel heater. The second electric heating component is connected in series with the second main fuel heater, and the second main fuel heater and the second standby fuel heater are connected in parallel. The first main refrigeration unit, the first standby refrigeration unit, the second main refrigeration unit, and the second standby refrigeration unit each include an evaporator, a gas-liquid separator, a low-pressure switch, a DC compressor, a high-pressure switch, a condenser, a liquid receiver, a dryer filter, and a capillary tube, which are connected in series via pipelines. A matching condenser fan is provided at the condenser. The evaporator and the first electric heating component in the first main refrigeration unit and the first standby refrigeration unit are connected to the first air supply duct through a first common air duct. A first circulating fan is provided in the first common air duct. The evaporator and the second electric heating component in the second main refrigeration unit and the second standby refrigeration unit are connected to the second air supply duct through a second common air duct. A second circulating fan is provided in the second common air duct.

[0009] Furthermore, the present invention provides an air conditioning system with dual redundant air ducts, wherein the first electric heating component and the second electric heating component each include multiple high-voltage DC electric heaters arranged in parallel with each other.

[0010] Furthermore, the present invention provides a dual-duct redundant air conditioning system, wherein the first main fuel heater, the first backup fuel heater, the second main fuel heater, and the second backup fuel heater are all connected to the fuel tank through the same fuel line distributor, and a metering fuel pump is provided between the first main fuel heater, the first backup fuel heater, the second main fuel heater, and the second backup fuel heater and the fuel line distributor.

[0011] Furthermore, the present invention provides a dual-duct redundant air conditioning system, wherein there are two electrical control cabinets, namely a first electrical control cabinet and a second electrical control cabinet. The first electrical control cabinet is equipped with a first temperature control controller for controlling a first air conditioning unit, and the second electrical control cabinet is equipped with a second temperature control controller for controlling a second air conditioning unit. The temperature and humidity acquisition module includes a first temperature and humidity sensor group and a second temperature and humidity sensor group. The temperature and humidity sensors in the first and second temperature and humidity sensor groups are distributed at different positions on the equipment insulation cylinder. The first temperature and humidity sensor group is electrically connected to the first temperature control controller, and the second temperature and humidity sensor group is electrically connected to the second temperature control controller. Both the first and second temperature control controllers are connected to a remote display and control box via a CAN control bus.

[0012] Furthermore, the present invention provides an air conditioning system with dual redundant air ducts, wherein the display and control box provides selectable automatic control mode and forced control mode;

[0013] In automatic control mode:

[0014] If the initial temperature inside the equipment's insulation cylinder is within the first temperature range threshold and less than the heating start threshold, then high-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating down threshold, medium-level heating will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped.

[0015] If the initial temperature inside the equipment's insulation cylinder is within the second temperature range threshold and less than the heating start threshold, then medium-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating down threshold, low-level heating will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped.

[0016] If the initial temperature inside the equipment's insulation cylinder is within the third temperature range threshold and less than the heating start threshold, then low-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped.

[0017] If the initial temperature inside the equipment's insulation cylinder is within the fourth temperature range threshold and greater than the cooling start threshold, then low-level cooling and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder is less than the cooling stop threshold, cooling and ventilation will be stopped.

[0018] If the initial temperature inside the equipment insulation cylinder is within the fifth temperature range threshold and greater than the cooling start threshold, then the first and second refrigeration units will simultaneously perform high-level cooling and ventilation. When the temperature inside the equipment insulation cylinder is less than the cooling down threshold, one of the first or second refrigeration units will perform high-level heating. When the temperature inside the equipment insulation cylinder is less than the cooling stop threshold, cooling and ventilation will stop.

[0019] In forced control mode:

[0020] Forced heating is set to high-level heating, and forced cooling is set to high-level cooling.

[0021] Furthermore, the present invention provides an air conditioning system with dual redundant air ducts, wherein in low-level heating, a high-voltage DC electric heater in the first electric heating assembly is turned on by a first temperature control controller for heating, or a high-voltage DC electric heater in the second electric heating assembly is turned on by a second temperature control controller for heating.

[0022] In medium-speed heating mode, the first temperature controller sequentially turns on all the high-voltage DC electric heaters in the first electric heating assembly for heating, or the second temperature controller sequentially turns on all the high-voltage DC electric heaters in the second electric heating assembly for heating.

[0023] In high-level heating mode, the first temperature controller sequentially turns on some of the high-voltage DC electric heaters and the first main fuel heater in the first electric heating assembly for heating, or the second temperature controller sequentially turns on some of the high-voltage DC electric heaters and the second main fuel heater in the second electric heating assembly for heating; when the first main fuel heater fails, the first backup fuel heater takes over the operation of the first main fuel heater, and when the second main fuel heater fails, the second backup fuel heater takes over the operation of the second main fuel heater;

[0024] In low-level cooling, the first main refrigeration unit is turned on by the first temperature control controller, and the power and speed of the DC compressor in the first main refrigeration unit are set to the first level power and speed; or the second main refrigeration unit is turned on by the second temperature control controller, and the power and speed of the DC compressor in the second main refrigeration unit are set to the first level power and speed. When the first main refrigeration unit fails, the first standby refrigeration unit takes over the operation; when the second main refrigeration unit fails, the second standby refrigeration unit takes over the operation.

[0025] In high-level refrigeration, the first temperature control controller turns on the first main refrigeration unit and the first standby refrigeration unit, and sets the power and speed of the DC compressors in the first main refrigeration unit and the first standby refrigeration unit to the second power level. Alternatively, the second temperature control controller turns on the second main refrigeration unit and the second standby refrigeration unit, and sets the power and speed of the DC compressors in the second main refrigeration unit and the second standby refrigeration unit to the second power level.

[0026] Furthermore, the present invention provides an air conditioning system with dual redundant air ducts, wherein the display and control box monitors the operating status of the first air conditioning unit and the second air conditioning unit in real time, and provides fault protection and fault alarm functions.

[0027] The present invention also provides a vehicle that utilizes the aforementioned dual-duct redundant air conditioning system. The vehicle includes a vehicle body and a driver's cab and an equipment insulation cylinder mounted on the vehicle body. The first equipment compartment, the second equipment compartment, and the third equipment compartment are mounted above the vehicle chassis. The display and control box includes a driver's cab display and control box and an equipment insulation cylinder display and control box. The driver's cab display and control box is mounted in the driver's cab of the vehicle, and the equipment insulation cylinder display and control box is mounted on the outer peripheral wall of the equipment insulation cylinder. The fuel distributor is connected to the vehicle's fuel tank via fuel pipes.

[0028] The beneficial effects of this invention are as follows: This invention enables two-stage adjustment through the first and second equipment compartments, aiming to ensure the uninterrupted and effective operation of the air conditioning equipment corresponding to the air ducts in the two equipment compartments. To this end, the first and second air supply ducts are interconnected through a top duct in the equipment compartment. This way, even if one air conditioning unit malfunctions, the other air conditioning unit can still blow air into the corresponding duct section through the top duct, ensuring that the use of the corresponding duct is not affected. Simultaneously, by utilizing the combined use of the first and second air conditioning units, the temperature and humidity environment inside the equipment insulation cylinder can be quickly adjusted, rapidly reaching the preset requirements. Furthermore, the equipment within the air conditioning units provides redundant backups, maximizing the final equipment within the environmental protection space and extending its adjustment range. This adapts to the environment of the corresponding temperature-controlled area and the constantly changing temperature and humidity requirements, thereby improving the reliability of providing air conditioning services to the equipment insulation cylinder. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an air conditioning system with redundant dual air ducts according to the present invention;

[0030] Figure 2 This is a schematic diagram illustrating the cooling and heating principles of the first and second air conditioning units in a dual-duct redundant air conditioning system according to the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of the oil distributor and metering oil pump in a dual-duct redundant air conditioning system of the present invention.

[0032] Figure 4 This is a schematic diagram of the connection principle between the oil distributor and the metering oil pump in a dual-duct redundant air conditioning system of the present invention.

[0033] Figure 5This is a control principle diagram of the electrical control cabinet in a dual-duct redundant air conditioning system of the present invention;

[0034] Figure 6 This is an electrical schematic diagram of the control board of the display and control box in a dual-duct redundant air conditioning system of the present invention. Detailed Implementation

[0035] The following description, in conjunction with the accompanying drawings, provides a detailed explanation and illustration of an air conditioning system with redundant dual air ducts according to the present invention.

[0036] like Figure 1 As shown, this embodiment of the invention discloses a dual-duct redundant air conditioning system. The first air conditioning unit 1, the second air conditioning unit 2, and the electrical control cabinet 3 are the core components of this air conditioning system. The first air conditioning unit 1 and the second air conditioning unit 2 regulate the temperature and humidity of the equipment insulation cylinder 7, while the electrical control cabinet 3 is responsible for the automated control of the entire system. The first equipment compartment 4, the second equipment compartment 5, and the third equipment compartment 6 are arranged sequentially along the axial direction of the equipment insulation cylinder 7. The first equipment compartment 4 is located at the front end of the equipment insulation cylinder 7, and a first supply air duct 41 and a first return air duct 42 are provided above the first equipment compartment 4. The first supply air duct 41 communicates with the inner cavity of the equipment insulation cylinder 7, allowing air conditioning air to circulate into the equipment insulation cylinder 7, while the first return air duct 42 communicates with the outside atmosphere. The second equipment compartment 5 is located at the rear end of the equipment insulation cylinder 7. Above the second equipment compartment 5, there is a second air supply duct 51 and a second return air duct 52. The second air supply duct 51 is also connected to the inner cavity of the equipment insulation cylinder 7, while the second return air duct 52 is also connected to the outside atmosphere. The first air supply duct 41 and the second air supply duct 51 are connected through the air duct 10 at the top of the equipment compartment. This design allows the air conditioning air to be evenly distributed in all parts of the equipment insulation cylinder 7 and can promptly remove excess moisture from the equipment insulation cylinder 7, quickly regulating the temperature and humidity environment inside the equipment insulation cylinder 7. If one of the first air conditioning unit 1 and the second air conditioning unit 2 fails, the other air conditioning unit can still blow air conditioning air into the equipment insulation cylinder 7 through the air duct 10 at the top of the equipment compartment, achieving uninterrupted air environment regulation of the equipment insulation cylinder 7. The first return air duct 42 and the second return air duct 52 are both connected to the outside atmosphere, allowing the system to automatically adjust the air humidity according to environmental changes. The temperature and humidity acquisition module is used to monitor the temperature and humidity information inside the insulation cylinder 7 of the equipment. The temperature regulation controller in the electrical control cabinet 3 controls the first air conditioning unit 1 and the second air conditioning unit 2 to provide the required temperature and humidity environment for the insulation cylinder 7 based on the temperature and humidity information collected by the temperature and humidity acquisition module. This design enables the entire system to operate automatically and can be precisely adjusted according to actual conditions, adapting to working conditions with harsh temperature and humidity requirements, such as rocket transportation conditions.

[0037] More specifically, when the circulating fan of the two air conditioning units starts, the internally installed air supply valves open the corresponding air supply ducts, directing the air conditioning air from the first air conditioning unit 1 and the second air conditioning unit 2 to the front and rear of the insulation cylinder 7 respectively through the fixed air supply ducts on the equipment insulation cylinder 7. The upper part of the equipment compartment containing the air conditioning units is equipped with supply and return air sealing rubber rings. These rings work in conjunction with the front and rear covers of the erected insulation cylinder, ensuring a reliable connection and seal when needed. During the period after the temperature control system has finished commissioning or is in use, when the front and rear top covers are not yet in place, the operator should block the outlet of the air duct sealing ring with the air duct sealing plug to prevent dust from entering the air duct.

[0038] The air supply and return vents at the top of the equipment compartment are sealed with silicone rubber flanges (tentative code) (compression range 0mm-35mm) and connected to the vehicle's air ducts. The cross-sectional area of ​​the air duct is 300mm x 70mm. The air supply vents between the two units are connected through the air duct 10 at the top of the equipment compartment, while the return vents are independent. All air ducts are sealed and insulated, with foam at least 35mm thick inside to achieve insulation. The air ducts 10 at the top of the equipment compartments of the first and second equipment compartments are connected by corrugated flexible hoses (hose size: inner diameter 150*380). The hoses are wrapped with 30mm thick insulation cotton and fixed with flanges and hose clamps. The through-compartment rigid air duct is integrated with the equipment compartment design, with a cross-sectional area of ​​300mm x 70mm.

[0039] See Figure 1 and combined Figure 2 As shown, in one embodiment of the present invention, the first air conditioning unit 1 includes a first refrigeration unit and a first heating unit, which share a first supply air duct 41 and a first return air duct 42. The second air conditioning unit includes a second refrigeration unit and a second heating unit, which share a second supply air duct 51 and a second return air duct 52. The first air conditioning unit 1 comprises a first refrigeration unit and a first heating unit, and these two functional parts share the first supply air duct 41 and the first return air duct 42. This unique design not only optimizes the equipment layout but also significantly improves operating efficiency. The second air conditioning unit 2 consists of a second refrigeration unit and a second heating unit, which also share the second supply air duct 51 and the second return air duct 52. This design concept also reflects the high efficiency and energy saving of the equipment. This design allows the air conditioning equipment to achieve energy conservation and environmental protection while fulfilling its function. Furthermore, its installation and maintenance process is simple and convenient, greatly reducing operating costs. In addition, while ensuring redundant design, the goal of reducing the space occupied by the equipment is also taken into account, so as not to make the equipment too large due to redundant design.

[0040] See Figure 1 and combined Figure 2As shown, in one embodiment of the present invention, the first refrigeration unit is configured with a first main refrigeration unit and a first standby refrigeration unit, which are connected in series via pipelines and consist of an evaporator, a gas-liquid separator, a low-pressure switch, a DC compressor 14, a high-pressure switch, a condenser 13, a liquid receiver, a dryer filter, and a capillary tube. During refrigeration operation, the evaporator absorbs heat from the room, which is then discharged to the outside by the condenser 13, thereby reducing the indoor temperature. A matching condenser fan is installed at the condenser 13 to quickly dissipate heat and improve refrigeration efficiency. Simultaneously, the refrigerant circulates within the system, ensuring continuous and stable refrigeration performance. This redundant design of the first main refrigeration unit and the first standby refrigeration unit increases the reliability and stability of the system, ensuring that even if the first main refrigeration unit fails, the first standby refrigeration unit can promptly take over and maintain the operation of the air conditioner.

[0041] The first heating unit includes a first electric heating element 11, a first main fuel oil heater 12, and a first backup fuel oil heater 12'. The first electric heating element 11 is connected in series with the first main fuel oil heater 12, while the first main fuel oil heater 12 and the first backup fuel oil heater 12' are connected in parallel. This design makes the heating effect more stable and significantly improves the heating capacity, while avoiding the situation where the entire system cannot function properly due to the failure of a single heater.

[0042] The second refrigeration unit includes a second main refrigeration unit and a second standby refrigeration unit. Their construction is similar to the first refrigeration unit, consisting of an evaporator, a gas-liquid separator, a low-pressure switch, a DC compressor 24, a high-pressure switch, a condenser 23, a liquid receiver, a dryer filter, and a capillary tube, connected in series via piping. This design increases the system's reliability and stability, ensuring that even if the second main refrigeration unit fails, the second standby refrigeration unit can promptly take over and maintain air conditioning operation.

[0043] The second heating unit includes a second electric heating element 21, a second main fuel oil heater 22, and a second backup fuel oil heater 22'. Similarly, the second electric heating element 21 is connected in series with the second main fuel oil heater 22, while the second main fuel oil heater 22 and the second backup fuel oil heater 22' are connected in parallel. This design concept is the same as that of the first heating unit, aiming to improve the stability and reliability of the system.

[0044] Both the first electric heating assembly 11 and the second electric heating assembly 21 consist of multiple high-voltage DC electric heaters connected in parallel. This heating method has advantages such as high efficiency, fast heating speed, and high safety.

[0045] It is worth mentioning that the evaporators and first electric heating components 11 in the first main refrigeration unit and the first standby refrigeration unit are connected to the first supply air duct 41 through the first common air duct 15. A first circulating fan 16 is installed in the first common air duct 15. The evaporators and second electric heating components 21 in the second main refrigeration unit and the second standby refrigeration unit are connected to the second supply air duct 51 through the second common air duct 25. A second circulating fan 26 is installed in the second common air duct 25, so that the evaporator and electric heater are located in the same common air duct. This design allows both the cooling and heating processes of the air conditioning system to be connected to the supply air duct through this common air duct. In this way, the refrigeration equipment and the heating equipment share the same air duct, thus eliminating the need for separate air ducts and effectively simplifying the system structure.

[0046] See Figure 3 and combined Figure 4 As shown, in one embodiment of the present invention, the first main fuel heater 12, the first backup fuel heater 12', the second main fuel heater 22, and the second backup fuel heater 22' are all connected to the fuel tank 9 through the same fuel distributor 8. A metering pump 81 is provided between each of the first main fuel heater 12, the first backup fuel heater 12', the second main fuel heater 22, and the second backup fuel heater 22' and the fuel distributor 8. That is, the first main fuel heater 12, the first backup fuel heater 12', the second main fuel heater 22, and the second backup fuel heater 22' are all connected to the fuel tank 9 through the same fuel distributor 8. Simultaneously, a metering pump 81 is provided between each fuel heater and the fuel distributor 8 to ensure fuel supply and accurate metering. This configuration ensures the normal operation of the fuel heaters and the efficient utilization of fuel. The first main fuel oil heater 12, the first backup fuel oil heater 12', the second main fuel oil heater 22, and the second backup fuel oil heater 22' are actually designed to be redundant. When one of the four fuel oil heaters fails, the fuel oil heater that is in normal use can be selected for heating. In other words, even if all the fuel oil heaters in the second heating unit fail, the fuel oil heaters in the first heating unit can be used to replace them and supplement the heating capacity. To deal with this extreme situation, the temperature control controller needs to control the operation of the corresponding circulating fan in the corresponding heating unit.

[0047] like Figure 1As shown, in one embodiment of the present invention, two electrical control cabinets 3 are configured, namely a first electrical control cabinet and a second electrical control cabinet. The first electrical control cabinet contains a first temperature regulating controller for controlling the first air conditioning unit, and the second electrical control cabinet contains a second temperature regulating controller for controlling the second air conditioning unit. The temperature and humidity acquisition module includes a first temperature and humidity sensor group and a second temperature and humidity sensor group. The temperature and humidity sensors in the first and second temperature and humidity sensor groups are distributed at different positions (front / middle / rear) of the equipment insulation cylinder. The first temperature and humidity sensor group is electrically connected to the first temperature regulating controller, and the second temperature and humidity sensor group is electrically connected to the second temperature regulating controller. Both the first and second temperature regulating controllers are connected to a display and control box located at a remote end via a CAN control bus. This connection method allows the display and control box to obtain data from the first and second temperature regulating controllers in real time, thereby enabling precise control of the temperature and humidity inside the equipment insulation cylinder.

[0048] Based on the above embodiments, the following control strategy can be implemented:

[0049] I. Index Indicator Control

[0050] 1. The total cooling capacity of the equipment's insulated air conditioning unit is 14kW, and the rated cooling capacity of a single air conditioning unit is 7kW.

[0051] 2. The total heating capacity of the equipment's insulated air conditioning unit is 13.5kW, with a single air conditioning unit producing 6.75kW of heating capacity. The heating capacity of each unit is 2.25kW at DC 520V.

[0052] 3. The heating capacity of a single fuel-fired heater in a single air conditioning unit is 4.5kW, and the total heating capacity of the four fuel-fired heaters in two air conditioning units is not less than 18kW.

[0053] 4. The total circulating air volume of the insulated air conditioner is 1200 m3 / h, and the air pressure is 1200 Pa.

[0054] II. Control and Protection of Air Conditioning Systems

[0055] 1. A distributed control method based on CAN bus is adopted, and the operator controls the temperature control system through the operation of the display and control box;

[0056] 2. The display and control box should have real-time status detection and alarm functions, be able to realize manual / automatic control functions of each actuator of the air conditioning unit, and complete the control of cooling, heating and dehumidification functions; realize the monitoring and uploading of various temperature and humidity information of the air conditioning system;

[0057] 3. It has the following protection functions: compressor high pressure protection, compressor low pressure protection, condenser fan overcurrent protection, electric heater over-temperature protection, fuel heater overcurrent protection, DC power supply DC520 / DC26V power supply protection, etc.

[0058] 4. It has the following alarm functions: power supply circuit alarm for circulating fan, overcurrent alarm, high and low pressure alarm for compressor, and humidity over-limit alarm.

[0059] III. Cooling Solution

[0060] The air conditioning system is a full return air system, and the air conditioning unit uses a total of 4 inverter DC compressor units to adjust the cooling capacity in real time. The cooling capacity adjustment range can be varied from 4.6kW, 4.95kW, 9.2kW, 9.9kW, to 14.85kW.

[0061] The standard operating conditions for the air conditioning system are: indoor dry-bulb temperature 27℃, wet-bulb temperature 19℃; outdoor dry-bulb temperature 35℃, wet-bulb temperature 24℃; refrigerant R134a; and, based on thermodynamic calculations, the cooling capacity of a single compressor refrigeration system is 4.95kW, with a maximum cooling capacity of 9.9kW when both compressors are operating simultaneously. Table 1 shows the standard operating condition refrigeration node parameters for a single compressor.

[0062] Table 1 Standard Operating Condition Refrigeration Cycle Node Parameter Table

[0063]

[0064] The air conditioning performance under high-temperature conditions is as follows: indoor dry-bulb temperature 40℃, wet-bulb temperature 28℃, and outdoor dry-bulb temperature 45℃. Thermodynamic calculations show that the cooling capacity of a single compressor refrigeration system is 4.6kW, and the maximum cooling capacity with two compressors operating simultaneously reaches 9.2kW. Table 2 shows the refrigeration cycle node parameters for a single compressor under high-temperature conditions. Figure 2 This is a schematic diagram of the refrigeration principle of an air conditioning unit.

[0065] Table 2 Refrigeration Cycle Node Parameter Table

[0066]

[0067] III. Heating Scheme

[0068] Heating is achieved through a combination of electric heaters and fuel oil heaters. A single air conditioning unit can be equipped with 3 electric heaters and 2 fuel oil heaters. The heating capacities are 2.25kW, 4.5kW, 6.75kW, 9.5kW, and 16.75kW respectively, with a heating adjustment range of 2.4% to 100%.

[0069] Four fuel heaters are used in combination, supplying fuel to the fuel combination pump through the vehicle's fuel tank. The fuel tank's inlet has a pre-installed metal pipe with an inner diameter of 8mm and an outer diameter of 10mm. A 0.8m long fuel pipe with an inner diameter of 8mm is connected to the inlet (a 1.5m pipe was used during testing, minus the 0.7m length inside the fuel tank). The metal pipe and the fuel pipe are connected using a compression fitting. The fuel pipe is connected to a bottom bracket (fuel distributor). The fuel pipe between the bottom bracket and the fuel pump has a diameter of 2mm and a length of 0.3m to 0.5m. The fuel pump is located approximately 2.5m from the first equipment compartment and approximately 3m from the second equipment compartment. During the initial commissioning with the fuel tank, all four fuel heaters must be started simultaneously to draw fuel. Afterward, this ensures that any one or more fuel heaters can be started independently and operate normally.

[0070] The fuel heater only needs to be controlled to start and stop. The fuel heater will operate according to its own program based on the set temperature. The first run will take a longer time. If it cannot start, simply turn it off and restart it.

[0071] IV. Temperature Regulator Control

[0072] 1. It has a real-time status detection and alarm function.

[0073] 2. Implement manual / automatic control functions for each actuator of the air conditioning unit to complete cooling and heating control; monitor and upload various temperature and humidity data of the system; possess the following protection functions: overcurrent protection for each electrical circuit, compressor high and low pressure protection, circulating fan not working protection, over-temperature protection, etc., and automatically cut off power to the actuators when a fault occurs; possess the following alarm functions: overcurrent alarm for each electrical circuit, compressor high and low pressure alarm, circulating fan not working alarm, over-temperature alarm, etc. The control principle is described in [reference needed]. Figure 5 .

[0074] 3. A distributed control method using a single CAN bus is adopted, and the environmental control system is controlled on the control panel of the display and control box in the driver's cab.

[0075] 4. It can monitor and display the temperature, humidity, and air volume of the air entering and exiting the air conditioning system.

[0076] 5. The host machine (development computer) is a PC with a main frequency of 1GHz or higher, 512M or higher memory, and a USB port; the target machine is a GC25 temperature control controller, whose hardware platform is an Infineon XC2287M-104F microprocessor with a main frequency of 80MHz, a program space of 828KByte, and a data space of 48KByte.

[0077] 6. The temperature control controller includes 16 digital inputs, 16 digital outputs (which can be multiplexed as 16 digital inputs / 8 PWM outputs), 10 analog signal acquisition channels, 1 serial interface, 2 CAN bus interfaces, and a 64KByte ferroelectric memory. For its specific circuit structure, please refer to [link to relevant documentation]. Figure 6 .

[0078] 7. Implemented by two identical and independent electrical control cabinets, the main control software of the air conditioning system resides in the temperature control controller within the cabinet, enabling both automatic and forced temperature control functions. Its design follows the principles of modularity, standardization, and universality, employing advanced design schemes to simplify the operating system, shorten preparation time, improve maintainability and reliability, and extend maintenance cycles and storage life. It features cooling, heating, and dehumidification modes, controlling temperature and humidity in the required environment according to set requirements.

[0079] Based on the above embodiments, in one embodiment of the present invention, the display and control box provides selectable automatic control mode and forced control mode;

[0080] There are five scenarios in automatic control mode that require specific handling strategies:

[0081] First response strategy: If the initial temperature inside the equipment's insulation cylinder is within the first temperature range threshold and less than the heating start threshold, then high-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating down threshold, medium-level heating will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped.

[0082] The second response strategy is as follows: If the initial temperature inside the equipment's insulation cylinder is within the second temperature range threshold and is less than the heating start threshold, then medium-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating down threshold, low-level heating will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped.

[0083] The third response strategy: If the initial temperature inside the equipment's insulation cylinder is within the third temperature range threshold and is less than the heating start threshold, then heat at a low setting and ventilate. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, then stop heating and ventilation.

[0084] Fourth response strategy: If the initial temperature inside the equipment insulation cylinder is within the fourth temperature range threshold and greater than the cooling start threshold, then perform low-level cooling and ventilation. When the temperature inside the equipment insulation cylinder is less than the cooling stop threshold, stop cooling and ventilation.

[0085] Fifth response strategy: If the initial temperature inside the equipment insulation cylinder is within the fifth temperature range threshold and greater than the cooling start threshold, then the first and second refrigeration units will simultaneously operate at high-level cooling and ventilation. When the temperature inside the equipment insulation cylinder is less than the cooling down threshold, one of the first or second refrigeration units will operate at high-level heating. When the temperature inside the equipment insulation cylinder is less than the cooling stop threshold, cooling and ventilation will be stopped.

[0086] These five coping strategies can be summarized in Table 4:

[0087] Table 4. Work content corresponding to automatic mode

[0088]

[0089] In forced control mode:

[0090] Forced heating is set to high-level heating, and forced cooling is set to high-level cooling.

[0091] In this embodiment, through the above control strategy, the air conditioning system can adaptively adjust the air environment according to the actual working conditions of the equipment insulation cylinder. The adopted automatic control strategy can quickly adjust the temperature and humidity environment of the equipment insulation cylinder to the set conditions and reduce system overhead, thereby achieving energy saving. Furthermore, this strategy automatically adjusts the air conditioner's operating status and output power based on changes in temperature and humidity inside the equipment insulation cylinder to achieve even greater energy efficiency. Simultaneously, it can automatically adjust the air conditioner's operating mode and airflow based on changes in outdoor climate conditions and ambient temperature, avoiding energy waste caused by changes in the external environment. In summary, this air conditioning system, through the application of adaptive control strategy technology, achieves rapid adjustment and energy-saving control of the temperature and humidity environment of the equipment insulation cylinder, possessing advantages such as high efficiency, reliability, and energy saving, providing strong support for energy conservation and emission reduction efforts in the aerospace field.

[0092] More specifically, the parameter configuration strategy (see Table 3) is for reference only. In actual applications, the parameters can be changed according to the actual situation.

[0093] Table 3 Configuration Parameters

[0094]

[0095] In one embodiment of the present invention, in low-level heating, a high-voltage DC electric heater in the first electric heating assembly 11 is turned on by the first temperature control controller for heating, or a high-voltage DC electric heater in the second electric heating assembly 21 is turned on by the second temperature control controller for heating.

[0096] In medium-speed heating mode, the first temperature controller sequentially turns on all the high-voltage DC electric heaters in the first electric heating assembly 11 for heating, or the second temperature controller sequentially turns on all the high-voltage DC electric heaters in the second electric heating assembly 21 for heating.

[0097] In high-level heating mode, the first temperature controller sequentially turns on some of the high-voltage DC electric heaters and the first main fuel heater 12 in the first electric heating assembly 11 for heating, or the second temperature controller sequentially turns on some of the high-voltage DC electric heaters and the second main fuel heater 22 in the second electric heating assembly 21 for heating; when the first main fuel heater 11 fails, the first backup fuel heater 11' replaces the first main fuel heater 11; when the second main fuel heater 22 fails, the second backup fuel heater 22' replaces the second main fuel heater 22.

[0098] In low-level cooling, the first main refrigeration unit is turned on by the first temperature control controller, and the power and speed of the DC compressor 14 in the first main refrigeration unit are set to the first level power and speed. Alternatively, the second main refrigeration unit is turned on by the second temperature control controller, and the power and speed of the DC compressor 24 in the second main refrigeration unit are set to the first level power and speed. When the first main refrigeration unit fails, the first standby refrigeration unit takes over the operation. When the second main refrigeration unit fails, the second standby refrigeration unit takes over the operation.

[0099] In high-level refrigeration, the first temperature control controller turns on the first main refrigeration unit and the first standby refrigeration unit, and sets the power and speed of the DC compressor 14 in both the first main refrigeration unit and the first standby refrigeration unit to the second power level. Alternatively, the second temperature control controller turns on the second main refrigeration unit and the second standby refrigeration unit, and sets the power and speed of the DC compressor 24 in both the second main refrigeration unit and the second standby refrigeration unit to the second power level.

[0100] In one embodiment of the present invention, the display and control box monitors the operating status of the first air conditioning unit and the second air conditioning unit in real time, and provides fault protection and fault alarm functions.

[0101] For details on its fault protection and handling, please refer to Table 5.

[0102] Table 5 Troubleshooting

[0103]

[0104]

[0105]

[0106]

[0107] This invention also provides a vehicle that employs a dual-duct redundant air conditioning system to ensure the comfort and functionality of key components such as the cab and equipment insulation cylinder 7. The vehicle mainly consists of a body and a cab and equipment insulation cylinder 7 mounted on the body. A first equipment compartment 4, a second equipment compartment 5, and a third equipment compartment 6 are installed above the chassis; these compartments are crucial for the vehicle's operation. A display and control box is another important component, including a cab display and control box and an equipment insulation cylinder display and control box. The cab display and control box is installed in the driver's cab for convenient operation and control by the driver. The equipment insulation cylinder display and control box is installed on the outer peripheral wall of the equipment insulation cylinder, allowing for real-time monitoring and adjustment of the cylinder's operating status. Furthermore, the vehicle is equipped with a fuel distributor 8, connected to the vehicle's fuel tank 9 via fuel lines, ensuring accurate and efficient fuel distribution and management. This vehicle has a reasonable structure and comprehensive functions, making it suitable for various complex environments and mission requirements.

[0108] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0109] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0110] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and simple improvements made on the substantive content of the present invention should be included within the protection scope of the present invention.

Claims

1. An air conditioning system with redundant dual air ducts, characterized in that: The system includes a first air conditioning unit, a second air conditioning unit, and an electrical control cabinet. These units are respectively installed in a first equipment compartment, a second equipment compartment, and a third equipment compartment. The first, second, and third equipment compartments are arranged sequentially along the axis of the equipment insulation cylinder. The first equipment compartment is located at the front end of the equipment insulation cylinder, and a first supply air duct and a first return air duct are located above it. The first supply air duct communicates with the inner cavity of the equipment insulation cylinder. The second equipment compartment is located at the rear end of the equipment insulation cylinder, and a second supply air duct and a second return air duct are located above it. The second supply air duct communicates with the inner cavity of the equipment insulation cylinder. The first and second supply air ducts are connected by a... The top air duct of the spare compartment is connected, and both the first and second return air ducts are connected to the outside atmosphere. A temperature and humidity acquisition module is installed inside the equipment insulation cylinder, and a temperature control controller is installed in the electrical control cabinet. The temperature control controller is electrically connected to the temperature and humidity acquisition module, the first air conditioning unit, and the second air conditioning unit. Based on the temperature and humidity information collected by the temperature and humidity acquisition module inside the equipment insulation cylinder, the temperature control controller controls the first and second air conditioning units to provide the required temperature and humidity environment for the equipment insulation cylinder. The first air conditioning unit includes a first refrigeration unit and a first heating unit, which share the first supply air duct and the first return air duct. The second air conditioning unit includes a second refrigeration unit and a second heating unit. The two heating units and the two refrigeration units share a second supply air duct and a second return air duct. The first refrigeration unit includes a first main refrigeration unit and a first standby refrigeration unit. The first heating unit includes a first electric heating element, a first main fuel oil heater, and a first standby fuel oil heater. The first electric heating element is connected in series with the first main fuel oil heater, and the first main fuel oil heater is connected in parallel with the first standby fuel oil heater. The second refrigeration unit includes a second main refrigeration unit and a second standby refrigeration unit. The second heating unit includes a second electric heating element, a second main fuel oil heater, and a second standby fuel oil heater. The second electric heating element is connected in series with the second main fuel oil heater, and the second main fuel oil heater is connected in parallel with the second standby fuel oil heater. The first main refrigeration unit, the first standby refrigeration unit, the second main refrigeration unit, and the second standby refrigeration unit all include an evaporator, a gas-liquid separator, a low-pressure switch, a DC compressor, a high-pressure switch, a condenser, a liquid receiver, a dryer filter, and a capillary tube, which are connected in series via pipelines. A matching condenser fan is provided at the condenser. The evaporator and the first electric heating component in the first main refrigeration unit and the first standby refrigeration unit are connected to the first air supply duct through a first common air duct. A first circulating fan is provided in the first common air duct. The evaporator and the second electric heating component in the second main refrigeration unit and the second standby refrigeration unit are connected to the second air supply duct through a second common air duct. A second circulating fan is provided in the second common air duct.

2. The air conditioning system with redundant dual air ducts according to claim 1, characterized in that: Both the first and second electric heating components include multiple high-voltage DC electric heaters connected in parallel.

3. The air conditioning system with redundant dual air ducts according to claim 1, characterized in that: The first main fuel heater, the first standby fuel heater, the second main fuel heater, and the second standby fuel heater are all connected to the fuel tank through the same fuel line distributor. A metering fuel pump is provided between the first main fuel heater, the first standby fuel heater, the second main fuel heater, and the second standby fuel heater and the fuel line distributor.

4. An air conditioning system with redundant dual air ducts according to claim 2 or 3, characterized in that: There are two electrical control cabinets, namely the first electrical control cabinet and the second electrical control cabinet. The first electrical control cabinet contains a first temperature regulating controller for controlling the first air conditioning unit, and the second electrical control cabinet contains a second temperature regulating controller for controlling the second air conditioning unit. The temperature and humidity acquisition module includes a first temperature and humidity sensor group and a second temperature and humidity sensor group. The temperature and humidity sensors in the first and second temperature and humidity sensor groups are distributed in different positions on the equipment insulation cylinder. The first temperature and humidity sensor group is electrically connected to the first temperature regulating controller, and the second temperature and humidity sensor group is electrically connected to the second temperature regulating controller. Both the first and second temperature regulating controllers are connected to a display and control box located at a remote end via a CAN control bus.

5. The air conditioning system with redundant dual air ducts according to claim 4, characterized in that: The display and control box offers selectable automatic control mode and forced control mode; In automatic control mode: If the initial temperature inside the equipment's insulation cylinder is within the first temperature range threshold and less than the heating start threshold, then high-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating down threshold, medium-level heating will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped. If the initial temperature inside the equipment's insulation cylinder is within the second temperature range threshold and less than the heating start threshold, then medium-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating down threshold, low-level heating will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped. If the initial temperature inside the equipment's insulation cylinder is within the third temperature range threshold and less than the heating start threshold, then low-level heating and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder exceeds the heating stop threshold, heating and ventilation will be stopped. If the initial temperature inside the equipment's insulation cylinder is within the fourth temperature range threshold and greater than the cooling start threshold, then low-level cooling and ventilation will be implemented. When the temperature inside the equipment's insulation cylinder is less than the cooling stop threshold, cooling and ventilation will be stopped. If the initial temperature inside the equipment insulation cylinder is within the fifth temperature range threshold and greater than the cooling start threshold, then the first and second refrigeration units will simultaneously perform high-level cooling and ventilation. When the temperature inside the equipment insulation cylinder is less than the cooling down threshold, one of the first or second refrigeration units will perform high-level heating. When the temperature inside the equipment insulation cylinder is less than the cooling stop threshold, cooling and ventilation will stop. In forced control mode: Forced heating is set to high-level heating, and forced cooling is set to high-level cooling.

6. The air conditioning system with redundant dual air ducts according to claim 4, characterized in that: In low-level heating mode, the first temperature controller turns on one of the high-voltage DC electric heaters in the first electric heating assembly for heating, or the second temperature controller turns on one of the high-voltage DC electric heaters in the second electric heating assembly for heating. In medium-speed heating mode, the first temperature controller sequentially turns on all the high-voltage DC electric heaters in the first electric heating assembly for heating, or the second temperature controller sequentially turns on all the high-voltage DC electric heaters in the second electric heating assembly for heating. In high-level heating mode, the first temperature controller sequentially turns on some of the high-voltage DC electric heaters and the first main fuel heater in the first electric heating assembly for heating, or the second temperature controller sequentially turns on some of the high-voltage DC electric heaters and the second main fuel heater in the second electric heating assembly for heating; when the first main fuel heater fails, the first backup fuel heater takes over the operation of the first main fuel heater, and when the second main fuel heater fails, the second backup fuel heater takes over the operation of the second main fuel heater; In low-level cooling, the first main refrigeration unit is turned on by the first temperature control controller, and the power and speed of the DC compressor in the first main refrigeration unit are set to the first level power and speed; or the second main refrigeration unit is turned on by the second temperature control controller, and the power and speed of the DC compressor in the second main refrigeration unit are set to the first level power and speed. When the first main refrigeration unit fails, the first standby refrigeration unit takes over the operation; when the second main refrigeration unit fails, the second standby refrigeration unit takes over the operation. In high-level refrigeration, the first temperature control controller turns on the first main refrigeration unit and the first standby refrigeration unit, and sets the power and speed of the DC compressors in the first main refrigeration unit and the first standby refrigeration unit to the second power level. Alternatively, the second temperature control controller turns on the second main refrigeration unit and the second standby refrigeration unit, and sets the power and speed of the DC compressors in the second main refrigeration unit and the second standby refrigeration unit to the second power level.

7. The air conditioning system with redundant dual air ducts according to claim 6, characterized in that: The display and control box monitors the operating status of the first and second air conditioning units in real time and provides fault protection and fault alarm functions.

8. A vehicle, characterized in that: The vehicle uses a dual-duct redundant air conditioning system as described in claim 7. The vehicle includes a body and a cab and an equipment insulation cylinder installed on the body. The first equipment compartment, the second equipment compartment, and the third equipment compartment are installed above the chassis of the vehicle. The display and control box includes a cab display and control box and an equipment insulation cylinder display and control box. The cab display and control box is installed in the cab of the vehicle, and the equipment insulation cylinder display and control box is installed on the outer peripheral wall of the equipment insulation cylinder. The oil circuit distributor is connected to the vehicle's oil tank through an oil pipe.

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