CN104534757A - Control method for general type liquid-cooling equipment - Google Patents
Control method for general type liquid-cooling equipment Download PDFInfo
- Publication number
- CN104534757A CN104534757A CN201410746222.8A CN201410746222A CN104534757A CN 104534757 A CN104534757 A CN 104534757A CN 201410746222 A CN201410746222 A CN 201410746222A CN 104534757 A CN104534757 A CN 104534757A
- Authority
- CN
- China
- Prior art keywords
- flow
- temperature
- outlet
- liquid
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 95
- 238000005057 refrigeration Methods 0.000 claims description 49
- 230000008859 change Effects 0.000 claims description 10
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 27
- 239000000110 cooling liquid Substances 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention relates to a control method for general type liquid-cooling equipment. The control method is only used for controlling a plurality of groups of hydraulic units and a group of bypass refrigerating unit for cooling an oil tank, and suitable for various types of equipment. The control method comprises the following steps: controlling the rotation speed of motors in the hydraulic units according to a received flow rate and a received temperature target value input by an operation panel as well as a collected flow rate, pressure and a temperature signal in an actual pipeline through the control unit; enabling the flow rate to meet the target value, controlling refrigerating capacity of the compressor, enabling the temperature of pipeline oil fluid outlet to meet the target value. According to the control method disclosed by the invention, a plurality of groups of parallel hydraulic loops are arranged in one centralized oil tank, so that adaptive supply oil refrigerating of various machine types is realized, and equipment complexity of multi-pipeline refrigerating though a bypass refrigerating mode can be avoided.
Description
Technical Field
The invention belongs to the technical field of ship and aviation equipment guarantee, and particularly relates to a control method of a universal liquid cooling device.
Background
With the development of aviation and national defense industry in China, the functions and the performance of the airplane are improved to different degrees, and the heat generated by the internal electronic equipment is gradually increased. The heat dissipation of the equipment itself cannot meet the requirements of the use environment of the equipment, and therefore cooling equipment is required to cool the internal electronic equipment of the aircraft. The aircraft is cooled by an external air field and cooling equipment in the aircraft during flying, but when the aircraft is inspected, overhauled, debugged and the like after landing, external cooling equipment is required to cool internal electronic equipment, and the external cooling equipment usually exchanges heat and circulates in the form of low-temperature cooling liquid, so the aircraft is called liquid cooling equipment in the industry. Liquid cooling equipment is as aviation security equipment, generally along with the model development of aircraft (the inside electronic equipment calorific capacity of different models aircraft is different usually), and a model aircraft corresponds a liquid cooling equipment promptly. Under the background of the design, the airplanes of various types correspond to the liquid cooling equipment of various types. With the increase of airplane models in China, the models of liquid cooling equipment needing to be guaranteed on the ground are increased continuously, the storage space of the guaranteeing equipment needing to be matched with the ground is gradually enlarged, the number of spare parts is increased gradually along with the increase of the number of the equipment, and the maintenance cost of the equipment is also increased continuously. These conditions have restricted the intensive development of liquid cooling equipment for aircraft.
The universal type airplane liquid cooling equipment capable of simultaneously guaranteeing various airplane types is designed, and due to the fact that cooling liquid flow and pressure of different airplane types are different, using methods of the universal type airplane liquid cooling equipment are different.
Disclosure of Invention
The present invention has been made in view of the above problems, and provides a method for controlling a general liquid cooling apparatus. The method can meet the refrigeration requirements of various types of equipment (airplanes) requiring refrigeration through a set of refrigeration equipment and a multifunctional control system.
The technical scheme adopted by the invention is as follows: a control method of a universal liquid cooling device is characterized in that: the control method is used for controlling the universal liquid cooling equipment, and the equipment comprises a power distribution unit, a control unit, an operation panel, a hydraulic unit and a refrigeration unit; the hydraulic units share one oil tank and one group of refrigeration units, the multiple groups of hydraulic units are respectively suitable for different models, each hydraulic unit comprises a motor, a hydraulic pump, a control valve group and a pipeline, the motor is connected with the hydraulic pump in a driving mode, an outlet of the hydraulic pump is connected with a deoiling pipeline, refrigerating fluid with certain pressure is output, a filter, a one-way valve and a reversing valve are sequentially arranged on the deoiling pipeline, and the deoiling pipeline is connected to an oil inlet of equipment needing cooling through the reversing valve; an oil outlet of the equipment needing cooling is connected with an oil return pipeline, and the oil return pipeline is connected back to the oil tank through the reversing valve; the oil return pipeline is also provided with a flow meter, a temperature sensor and a pressure sensor, the oil return pipeline is provided with the temperature sensor close to an airplane oil outlet, and the control unit is connected with the motor, the flow meter, the temperature sensor and the pressure sensor and is used for acquiring flow, pressure and temperature signals;
the refrigerating units are only one group, are arranged in the oil tank and perform bypass cooling on the centralized oil tank, and comprise a motor pump group, wherein the liquid inlet end of the pump group is connected into the oil tank, the output end of the motor pump group is connected with a filter, the output end of the filter is connected with the external circulation inlet of the heat exchanger, and the external circulation outlet of the heat exchanger is connected into the oil tank; the output end of the cooling module of the heat exchanger is connected to a gas-liquid separator, the gas-liquid separator is connected to the inlet end of a refrigeration compressor, the outlet end of the refrigeration compressor is connected to an evaporator, the outlet end of the evaporator is connected to a liquid receiver, the outlet of the liquid receiver is connected to a gas-liquid converter, and the gas-liquid converter is connected to the input end of the cooling module of the heat exchanger; the control unit is connected with the refrigeration compressor; the control method is that the control unit controls the rotating speed of a motor in the hydraulic unit according to the flow and temperature target values input by the received operation panel and the flow, pressure and temperature signals in the actual pipeline, so that the flow meets the target values, the refrigerating capacity of the compressor is controlled, and the outlet temperature of the oil liquid in the pipeline meets the target values.
The method for adjusting the flow of the hydraulic unit by the control unit is characterized in that flow target values of various types of equipment needing cooling are preset in the control unit, an output flow target value corresponding to the type of the equipment needing cooling is selected through an operation panel or is manually input, the output flow target value is input into the control unit in real time, the control unit acquires the current flow in real time through an oil inlet flowmeter and then compares the current flow with the target flow to form an electric control signal for controlling the rotating speed of the motor; the motor rotating speed electric control signal is input into a driving power supply, the driving power supply changes the driving parameters of the motor, the driving motor changes the rotating speed of the driving motor, and the motor drives the pump to change the rotating speed through the coupler, so that the output flow of the pump is changed; the output flow reaches the flow meter through the direction control valve, and the flow meter changes the flow information into an electric signal and feeds the electric signal back to the controller; and the controller compares the new flow value with the target value to calculate and generate a new motor rotating speed control signal, and the flow is adjusted repeatedly until the current flow value is the same as the target flow value.
The control unit also adjusts the flow according to the temperature of the oil outlet of the equipment needing cooling.
The method for calculating and adjusting the temperature of the refrigeration unit by the control unit is characterized in that a target value of the temperature of an outlet liquid of the equipment to be cooled is set in the control unit, a target value of the output flow corresponding to the type of the equipment to be cooled is selected by an operation panel or the target value of the output flow is manually input, a current outlet temperature value is detected by an outlet temperature sensor, the temperature difference of liquid in an oil inlet and an oil outlet of an airplane is calculated by the inlet and outlet temperature sensors, then a series of refrigeration capacity control rule curves are simulated by a controller according to the difference value between the outlet target temperature and the actual outlet temperature and the difference value between the inlet temperature and the outlet temperature, and the controller selects an applicable control curve according to the difference value between the outlet target temperature and the actual outlet temperature and the difference.
In the control method, when the temperature of the refrigerating fluid is lower than 20 ℃, the refrigerating compressor is started to refrigerate the equipment needing to be cooled.
The invention has the main beneficial effects that:
1. the invention can realize the adaptive oil supply refrigeration of airplanes of various types by arranging a plurality of groups of parallel hydraulic refrigeration loops in one large centralized oil tank. 2. Each group of hydraulic refrigeration loops are provided with a flowmeter, a thermometer and the like, variable flow control can be respectively realized for each group of loops through signal acquisition and operation of a controller, and the problem that the traditional liquid cooling equipment cannot be matched with various airplanes is solved. 3. Compared with the method of adjusting the flow rate by a proportional pump or a proportional valve adopted in the prior art, the method has the advantages that the special requirements on the motor, the pump, the valve and the like are not required, the working grade is reduced, the cost of equipment is reduced, and the adaptability of the working environment is enhanced. 4. The invention can realize the refrigeration of all machine types only by arranging a set of refrigeration system in the centralized oil tank and refrigerating oil in the oil tank, and the refrigeration elements are arranged on the pipelines of each single unit group in the prior art.
Drawings
FIG. 1 is a system block diagram of the apparatus of the present invention;
FIG. 2 is a hydraulic unit diagram;
FIG. 3 is a diagram of a refrigeration unit;
FIG. 4 is a schematic diagram of flow control in a hydraulic unit;
fig. 5 is a graph showing a control law simulated by the controller of the refrigeration unit according to the inlet and outlet temperatures of the pipeline and the preset temperature.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The use method of the invention is suitable for the following general liquid cooling equipment. The apparatus structure will be described first to make its use more clear.
The equipment is shown in figure 1 and mainly comprises: the power distribution unit 1, the control unit 2, the operation panel 3, the hydraulic unit 4, the refrigeration unit 5 and the necessary oil, gas and electric pipelines.
The power distribution unit 1 is used for transforming and rectifying external power and distributing the external power to the controller unit, the hydraulic unit, the refrigeration unit and the loading vehicle so as to drive all parts to operate. The circuit breaker mainly comprises a rectifier module, an alternating current contactor, a circuit breaker, a relay, a driver and other electrical elements.
The control unit 2 is used for receiving signals of an operation panel, collecting various sensing signals of pipeline flow, pressure, temperature and the like, inputting analog quantity and digital quantity signals to the hydraulic part and the refrigeration part, and controlling the motor rotating speed and the electric control valve of the hydraulic part after logical operation to enable the electric control valve to generate required flow, pressure and temperature; controlling the refrigerating capacity of the compressor according to the flow and the temperature of the pipeline to enable the refrigerating capacity to meet the requirement of the temperature of the oil outlet of the pipeline; controlling the buffer start when the motor is started; and controlling the state display of the operation panel. The control unit mainly comprises various PLC modules.
The operation panel 3 is mainly a human-computer interaction interface. The multifunctional intelligent desk lamp mainly comprises a button, a knob, an operation keyboard, an indicator light, a liquid crystal screen, a control panel, an external frame and the like.
The hydraulic unit 4 stores a refrigerant fluid and provides the aircraft with a prescribed flow and pressure of the refrigerant fluid. The device mainly comprises a motor pump set, a control valve group, an oil tank and accessories thereof.
The refrigerating unit 5 can refrigerate the refrigerating fluid according to the refrigerating capacity signal value provided by the control unit. The cooling device mainly comprises a refrigeration compressor, a condenser, a storage device, an expansion valve, a gas-liquid separator, a heat exchanger, a motor pump set and the like, and is used for cooling oil in an oil tank.
The rubber tube reel set can contain a plurality of groups of hydraulic hoses, the hoses can be automatically retracted under the assistance of manpower, and the hoses can also stay at any pulled-out position. The spiral coil spring mainly comprises a coil plate frame, a coil spring, a rotary joint, a pipeline and the like.
The loading vehicle can provide various interfaces for the vehicle to walk and stay, and the vehicle can walk when being dragged. The vehicle frame mainly comprises a vehicle frame mounting base, a universal joint, wheels, a traction ring, a mooring ring and the like.
Since cooling is performed for a plurality of model types, control programs for a plurality of model types, including settings for the supply amount, temperature, and the like thereof, are set in advance in the control unit 2. The operation panel 3 is provided with model identifiers and operation buttons for various models. Including hoses, on which appropriate model identification is also marked.
The hydraulic unit 4 should have a plurality of models, and therefore should be configured as a plurality of sets, each set corresponding to one model, or two sets of combinations corresponding to one model, and the flow rate, pressure, etc. of each set of units are independently controlled by the control unit.
The cooling unit 5 is only one set since it performs cooling of the entire tank. The refrigeration unit is also independently controlled in refrigeration temperature by the control unit.
The hydraulic unit 4 and the refrigeration unit 5 serve as main actuating units in the device and will be described in greater detail below.
The hydraulic unit 4 shown in fig. 2 has only two sets of hydraulic unit circuits, and in practice there may be multiple sets, supplying more models of units. The hydraulic unit mainly realizes the supply of cooling liquid to the equipment needing cooling through a group of hydraulic circuits.
The hydraulic principle is briefly described by taking a left group of hydraulic circuits as an example. The motor 2-1 drives the hydraulic pump 1-1 to work, and the hydraulic pump 1-1 pressurizes the refrigerant liquid in the oil tank 17 to a certain pressure and outputs the refrigerant liquid to the filter 3-1. The overflow valve 4-1 can adjust the system pressure, if the external load is too large, the system pressure does not rise after rising to the designated pressure, and the excess flow returns to the oil tank through the overflow valve 4-1. The high-pressure refrigerant liquid is filtered by the filter 3-1 and then flows to the reversing valve 5-1. The reversing valve 5-1 can change the flowing direction of the refrigerating fluid, the refrigerating fluid can return to an oil tank through the reversing valve 5-1 when liquid supply to the airplane is not needed, the electromagnet of the reversing valve 5-1 is electrified when liquid supply to the airplane is needed, the refrigerating fluid can be sent to the airplane through the flowmeter 6-1, the temperature sensor 7-1, the pressure sensor 8-1 and the hose reel 9-1, and the inlet and the outlet of the airplane cooling box are respectively provided with the quick connectors 10-1 and 10-2. The refrigerating fluid returned from the airplane returns to the oil tank through the temperature sensor 7-2 and the reversing valve 5-1.
The right side is a hydraulic circuit of another unit, the structural principle is the same as that of the left side, and the path can supply liquid for airplanes of other types. However, the two hydraulic circuits and even more hydraulic circuits can work together to realize mutual redundancy of the two or more hydraulic circuits, supply is synchronously provided for airplane models with larger demands, or when one hydraulic circuit fails, the other hydraulic circuit replaces the hydraulic circuit to work, the measure can be realized by connecting pipelines with the stop valves 16 between the oil supply main pipelines of the single hydraulic circuits, and the stop valves 16 are opened when the supply is needed, or are closed otherwise.
Therefore, the loops can share one oil tank, each group of loops can only independently supply liquid for the machine type of the loop and can also coordinate and fight under the common environment, the structural mode can greatly simplify the structure of the system, save the space for equipment, reduce the cost and improve the universality of the equipment.
As shown in the rightmost side of the figure, the motor 12 drives the hydraulic pump 13 to work, the hydraulic pump 13 pressurizes the refrigerant with temperature rise in the oil tank to a certain pressure and passes through the filter 14, and the refrigerant returns to the oil tank after being cooled by the refrigeration unit 5. Relief valve 15 may control the refrigeration cycle pressure. In order to avoid excessive cooling of the tank in special circumstances, it is preferable to provide a supplementary heating device in the tank.
The refrigeration technology provided by the invention is bypass cooling technology provided for oil liquid in the common oil tank 17. Because conventional liquid cooling devices are designed for a particular model of aircraft, there is typically only one set of pipes. According to the characteristics, the traditional liquid cooling equipment arranges the refrigerating unit at the output pipeline of the hydraulic pipeline circulation, and refrigerates the refrigerating liquid in the pipeline and exchanges heat with the heat exchanger in the airplane. The method is suitable for single-unit pipeline output, and if compatible liquid cooling equipment (multi-unit pipeline output) adopts the method, the cooling assembly with corresponding power arranged on each group of output pipelines can realize basic functions, but the problems of large equipment volume, high equipment cost, low efficiency and the like can be caused. Therefore, in a compatible liquid cooling device using multi-pipeline output, a group of common refrigeration units are considered to refrigerate the refrigerant liquid and meet the requirement of multi-pipeline output.
Fig. 3 shows an embodiment of a bypass cooling method provided by the present invention, in which a compressor is used for cooling, a hydraulic pump 13 is driven by a motor 12 to pump the refrigerant fluid in the oil tank to a filter 14, and the refrigerant fluid filtered by the filter returns to the oil tank through a heat exchanger 18; the overflow valve 15 sets the maximum pressure of the refrigerant fluid in the pipeline and overflows back to the oil tank when the pressure exceeds. The cooling module of the heat exchanger itself is connected to a compressor cooling device comprising a refrigerant compressor 19, an evaporator 20, a liquid receiver 21, a gas-liquid converter 22, a gas-liquid separator 23. The refrigeration compressor 19 compresses the gaseous refrigerant into a liquid refrigerant, the gas-liquid conversion raises the liquid temperature, the evaporator 20 takes away the heat of the liquid refrigerant, the relatively cold refrigerant passes through the liquid reservoir 21 to the gas-liquid converter 22, the temperature of the gaseous refrigerant is greatly reduced in the process that the refrigerant is converted from the liquid state to the gaseous state, the gaseous refrigerant enters the heat exchanger 18 to exchange heat with the oil in the oil tank so as to lower the temperature of the oil in the oil tank, and then the gaseous refrigerant returns to the refrigeration compressor through the gas-liquid separator 23 to complete a refrigeration cycle.
Because of the control of the supply of different aircraft models, it is critical to control the flow and temperature of the individual single circuits independently in a centralized large tank.
Flow control technique
The traditional liquid cooling equipment is designed for a specific model airplane, and a proportional pump or a proportional valve which is frequently used for flow control needs to be a product with high cleanliness requirement, which undoubtedly increases the cost of the equipment. If the component is selected to be a combination of a fixed displacement pump and a conventional hydraulic valve configured on a general motor, although the fixed displacement pump and the conventional hydraulic valve have lower requirements on the level of the refrigerant liquid pollutants and meet the requirements of the airplane on the low level of the refrigerant liquid pollutants, the fixed displacement pump is designed according to the maximum calorific value of the airplane and always outputs the refrigerant liquid to the airplane at a constant flow, and the pipeline and the heat exchanger in the airplane are impacted greatly, so that the service life of the pipeline and the heat exchanger in the airplane is influenced; meanwhile, the fixed displacement pump can only realize fixed displacement supply, and the output pressure and flow are fixed values, which also does not meet the demand of convenient flow supply.
The compatible liquid cooling equipment of the invention needs to meet the use requirements of various types of airplanes, and provides a unique hydraulic flow control method, which is shown in figure 4. The motor, the hydraulic pump and the control valve group can all use conventional products, and have no special requirements on the hydraulic pump and the control valve group. Still taking the left hydraulic unit as an example for introduction, the flow control is divided into two main links:
(1) the first step is to change the current output flow to the target flow value
Selecting the model of the airplane through an operation panel, namely, selecting a target value corresponding to an output flow value or manually inputting the target value of output flow; the output flow target value is input into the control unit 2 in real time, and meanwhile, the controller collects the output flow signal of the flowmeter 6-1 in real time; the target value and the current flow value are compared and calculated in the controller, and an electric control signal for controlling the rotating speed of the motor 2-1 is formed; the electric control signal of the motor rotating speed is input into a driving power supply, the driving power supply changes the driving parameter (frequency or voltage) of the motor, and the driving motor changes the rotating speed of the motor; the motor 2-1 drives the pump 1-1 to change the output flow through the coupler, namely, the flow of the hydraulic system is changed. The flow of the system reaches a flow meter 6-1 through an electromagnetic directional valve 5-1, and the flow meter 6-1 changes the flow information into an electric signal and feeds the electric signal back to the controller; the controller compares the new flow value with the target value to calculate and generate a new motor rotating speed control signal; the above is a cycle, and the flow adjustment is performed repeatedly until the current flow value is the same as the target flow value.
(2) The second step is to increase the output flow according to the refrigeration demand
Because the refrigerating fluid is provided, the control flow rate is not enough to reach the target value, the refrigerating fluid is increased along with the increase of the heat productivity of the airplane in the refrigerating process, the controller controls the liquid cooling device to output at a certain constant flow rate at the initial stage according to the model of the selected airplane, however, when the rated flow rate is not enough to meet the refrigerating requirement, the refrigerating amount must be increased, and the increase of the refrigerating flow rate is one of measures. When the controller detects that the temperature difference of the temperature sensors 7-1 and 7-2 of the outgoing path and the return path exceeds a preset value in real time, the controller increases the output flow target value, so that the output flow of the liquid cooling equipment is increased to balance the heat productivity generated by the airplane until the temperature difference of the temperature sensors 7-1 and 7-2 is recovered to the preset value. The flow value adjusted according to the temperature is still realized by adopting a mode of controlling the rotating speed of the motor, and the optimal control of the flow is finished only under the condition that the flow meets a target value and also meets a preset temperature value. In order to prevent the capacity of the cooling box of the aircraft from being insufficient due to the excessive flow, the initial target value of the flow is set to be lower than the capacity value of the cooling box.
In addition, the increase of the flow rate of the refrigerant liquid is one of measures for accelerating the refrigeration; the temperature of the refrigerating fluid is reduced, which is one of the measures for increasing the refrigeration, and the temperature of the refrigerating fluid can be changed without changing the refrigerating flow.
The temperature control method of bypass cooling comprises the following steps: setting a target value of the temperature of the cooling liquid at the outlet of the airplane in the controller according to the graph shown in FIG. 3; detecting a current environment temperature value through a temperature sensor and calculating the liquid temperature difference at an inlet and an outlet of an airplane pipeline; and compiling a controller algorithm to form a specific refrigeration control signal by the difference value between the target temperature and the outlet temperature and by referring to the current environment temperature value and the pipeline inlet and outlet temperature difference value. The refrigeration control signal controls the execution power of the compressor, namely the refrigeration capacity is controlled; if the ambient temperature is high and the temperature difference between the inlet and the outlet is large, the refrigerating capacity is increased; and if the temperature difference between the environment temperature and the inlet and outlet is small, the refrigerating capacity is reduced. Refrigerating medium formed by the refrigerating compressor exchanges heat with refrigerating fluid in the oil tank through a heat exchanger, namely, the aircraft refrigerating fluid in the oil tank is cooled; and circularly detecting the temperature signal and adjusting the refrigerating capacity until the temperature difference between the target temperature value and the outlet temperature value is less than a specified range.
The key to refrigeration technology is temperature stability and accuracy. When the multi-pipeline input and output are dealt with, the liquid cooling equipment adopts a mode of cooling the refrigerant liquid in the oil tank to replace the refrigerant liquid in the traditional cooling pipeline.
The controller is used for acquiring the difference value delta T between the outlet temperature of the pipeline and the preset temperature value and controlling the inlet and the outlet of the refrigeration pipeline
The temperature difference of the mouth determines the control law, and the curve of the simulated control law is shown in figure 5, and the curve is a curve family. The controller selects an applicable control curve according to the two input temperature differences. As can be seen from the figure, the factor determining the refrigerating capacity has two values, namely the difference value Delta T between the input pipeline outlet temperature and the preset temperature value and the refrigerating pipeline
The temperature difference at the inlet and outlet. The difference delta T between the outlet temperature of the pipeline and the preset temperature value expresses the difference between the actual output value and the target value, and the refrigerating capacity should be larger if the numerical value is larger. The temperature difference of the inlet and the outlet of the refrigeration pipeline expresses the heat productivity of electronic devices in the airplane, and the refrigerating capacity is required to be larger when the numerical value is larger.
The power distribution unit 1 is used for connecting an external power supply (ship electricity) and converting three-phase 380V/50Hz electric energy of the external power supply into alternating current and direct current of various specifications required by each part of the liquid cooling device through the rectifier module and the power distribution module. The controller receives a control instruction of the operation panel, and the controller realizes power supply to each part by controlling the on-off of the switching devices of the power distribution part. The power distribution module of the power distribution part supplies power to the speed regulator and the hydraulic pump of the hydraulic part, and meanwhile, the controller outputs an analog quantity signal to control the speed regulator, adjust the rotating speed of the hydraulic pump and provide cooling liquid with specified flow and pressure according to different machine types; the power distribution module of the power distribution part also supplies power to a compressor of the refrigeration part, and meanwhile, the controller outputs an analog quantity signal to adjust the operation condition of the compressor, control the refrigeration quantity of the compressor and realize the temperature control of output refrigerant liquid; the rectifier module provides direct current power supply for a controller, an operation panel and the like.
The use of the device is made more clear by the following procedure, as described above with respect to the device:
1) checking before use: assuming that the initial position of the general liquid cooling equipment is in a warehouse or between equipment, firstly, the appearance inspection of the equipment is carried out, including the integrity inspection of the equipment, whether the equipment has oil leakage signs or not, and in addition, the problems of obstruction and interference of the liquid cooling equipment in the moving process are eliminated, namely, the lamp inspection (equipment state inspection);
2) releasing the mooring lock: means for releasing the liquid cooling device such as a mooring lock or a ground lock of the compatible liquid cooling device;
3) a mobile device: moving the general liquid cooling equipment to the vicinity of the airplane of the designated airplane type through a tractor;
4) mooring and locking: fixing (mooring or ground lock support) the compatible liquid cooling equipment;
5) carrying out external connection: connecting a grounding wire on the liquid cooling equipment with an external grounding column, connecting a power line of the liquid cooling equipment with an external power supply, pulling out a hose marked with the type identifier on the liquid cooling equipment, and butting the hose with an oil inlet pipe and an oil outlet pipe of a corresponding airplane;
6) control operations at an operation panel, comprising:
a) turning on a power supply of the liquid cooling equipment, and selecting a corresponding machine type at an operation panel;
b) generally, when a model is selected, system parameters are set and completed in a controller, if the parameters need to be modified manually, the output flow of cooling liquid and the cooling temperature (the temperature of the cooling liquid entering an airplane) are set manually in a display control area of an operation panel;
c) pressing an internal circulation button, a refrigeration button and a motor starting button of a corresponding machine type;
d) monitoring the change of the working state: observing the temperature change of the current refrigerating fluid in a display area of an operation panel;
e) when the temperature of the refrigerating fluid is lower than 20 ℃, the 'internal circulation' button is pressed again, the 'internal circulation' lamp is turned off, and the refrigerating fluid refrigerates the airplane at the moment;
f) monitoring the change of the working state: observing the temperature change and the output flow change of the current refrigerating fluid in a display area of an operation panel;
g) when the airplane needs to stop refrigerating, a motor stop button is pressed down, and the power supply of the liquid cooling equipment is turned off;
7) releasing the external connection: the pipeline butted with the airplane is disassembled, the pipeline can be automatically recovered to the liquid cooling equipment in a manual assistance state, and the grounding wire and the power wire are disassembled and recovered to the general liquid cooling equipment;
8) releasing the mooring lock: releasing the liquid cooling equipment fixing device (releasing mooring or ground lock support, etc.);
9) a mobile device: moving the liquid cooling equipment to the vicinity of another airplane of a specified type to prepare for cooling of the next equipment or moving the equipment to a warehouse;
10) mooring and locking: fixing the compatible liquid cooling equipment again (mooring or ground lock support, etc.);
11) and repeating the steps 2) to 10) to realize the multi-machine cooling task through the liquid cooling equipment.
Claims (5)
1. A control method of a universal liquid cooling device is characterized in that: the control method is used for controlling the universal liquid cooling equipment, and the equipment comprises a power distribution unit, a control unit, an operation panel, a hydraulic unit and a refrigeration unit; wherein,
the hydraulic units share one oil tank and one refrigeration unit, the multiple hydraulic units are respectively suitable for different models, each hydraulic unit comprises a motor, a hydraulic pump, a control valve group and a pipeline, the motor is connected with the hydraulic pump in a driving mode, an outlet of the hydraulic pump is connected with a deoiling pipeline, refrigerating fluid with certain pressure is output, a filter, a one-way valve and a reversing valve are sequentially arranged on the deoiling pipeline, and the deoiling pipeline is connected to an oil inlet of equipment needing cooling through the reversing valve; an oil outlet of the equipment needing cooling is connected with an oil return pipeline, and the oil return pipeline is connected back to the oil tank through the reversing valve; the oil return pipeline is also provided with a flow meter, a temperature sensor and a pressure sensor, the oil return pipeline is provided with the temperature sensor close to an airplane oil outlet, and the control unit is connected with the motor, the flow meter, the temperature sensor and the pressure sensor and is used for acquiring flow, pressure and temperature signals;
the refrigerating units are only one group, are arranged in the oil tank and perform bypass cooling on the centralized oil tank, and comprise a motor pump group, wherein the liquid inlet end of the pump group is connected into the oil tank, the output end of the motor pump group is connected with a filter, the output end of the filter is connected with the external circulation inlet of the heat exchanger, and the external circulation outlet of the heat exchanger is connected into the oil tank; the output end of the cooling module of the heat exchanger is connected to a gas-liquid separator, the gas-liquid separator is connected to the inlet end of a refrigeration compressor, the outlet end of the refrigeration compressor is connected to an evaporator, the outlet end of the evaporator is connected to a liquid receiver, the outlet of the liquid receiver is connected to a gas-liquid converter, and the gas-liquid converter is connected to the input end of the cooling module of the heat exchanger; the control unit is connected with the refrigeration compressor;
the control method is that the control unit controls the rotating speed of a motor in the hydraulic unit according to the flow and temperature target values input by the received operation panel and the flow, pressure and temperature signals in the actual pipeline, so that the flow meets the target values, the refrigerating capacity of the compressor is controlled, and the outlet temperature of the oil liquid in the pipeline meets the target values.
2. The method of claim 1, wherein: the method for adjusting the flow of the hydraulic unit by the control unit comprises the steps that flow target values of various types of equipment needing cooling are preset in the control unit, an output flow target value corresponding to the type of the equipment needing cooling is selected through an operation panel or is manually input into the output flow target value, the output flow target value is input into the control unit in real time, the control unit collects the current flow in real time through an oil inlet flowmeter and then compares the current flow with the target flow to form an electric control signal for controlling the rotating speed of a motor; the motor rotating speed electric control signal is input into a driving power supply, the driving power supply changes the driving parameters of the motor, the driving motor changes the rotating speed of the driving motor, and the motor drives the pump to change the rotating speed through the coupler, so that the output flow of the pump is changed; the output flow reaches the flow meter through the direction control valve, and the flow meter changes the flow information into an electric signal and feeds the electric signal back to the controller; and the controller compares the new flow value with the target value to calculate and generate a new motor rotating speed control signal, and the flow is adjusted repeatedly until the current flow value is the same as the target flow value.
3. The method of claim 2, wherein: the control unit also adjusts the flow according to the temperature of the oil outlet of the equipment needing cooling.
4. The method of claim 1, wherein: the method for calculating and adjusting the temperature of the refrigerating unit by the control unit is characterized in that a target value of the temperature of an outlet liquid of equipment to be cooled is set in the control unit, a target value of an output flow corresponding to the type of the equipment to be cooled is selected through an operation panel, or the target value of the output flow is manually input, a current outlet temperature value is detected through an outlet temperature sensor, the temperature difference of liquid entering and exiting an oil port of an airplane is calculated through an inlet temperature sensor and an outlet temperature sensor, then a series of refrigerating capacity control rule curves are simulated by a controller according to the difference value between the outlet target temperature and the actual outlet temperature and the difference value between the inlet temperature and the outlet temperature, and an applicable control curve is selected by the controller according to the difference value between the outlet target temperature and.
5. The method for controlling a general liquid cooling apparatus according to claim 1 or 4, wherein: in the control method, when the temperature of the refrigerating fluid is lower than 20 ℃, the refrigerating compressor is started to refrigerate the equipment needing to be cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746222.8A CN104534757B (en) | 2014-12-08 | 2014-12-08 | A kind of control method of universal liquid cool equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746222.8A CN104534757B (en) | 2014-12-08 | 2014-12-08 | A kind of control method of universal liquid cool equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104534757A true CN104534757A (en) | 2015-04-22 |
| CN104534757B CN104534757B (en) | 2016-11-02 |
Family
ID=52850331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410746222.8A Active CN104534757B (en) | 2014-12-08 | 2014-12-08 | A kind of control method of universal liquid cool equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104534757B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570479A (en) * | 2018-12-24 | 2019-04-05 | 常州卡斯特铝精密铸造科技有限公司 | Oil sump casting machine |
| CN110494023A (en) * | 2019-09-16 | 2019-11-22 | 合肥天鹅制冷科技有限公司 | A kind of liquid cooling equipment suitable for multi-model |
| CN111633464A (en) * | 2020-06-24 | 2020-09-08 | 昆山璟赫机电工程有限公司 | Cooling system of drilling machine |
| CN117806402A (en) * | 2023-12-28 | 2024-04-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electro-hydraulic thermal control method and system for aircraft |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902087A (en) * | 2003-12-30 | 2007-01-24 | 空中客车德国有限公司 | Cooling system for the cooling of heat-producing devices in an aircraft |
| JP2007294887A (en) * | 2006-03-29 | 2007-11-08 | Dainippon Screen Mfg Co Ltd | Substrate cooling device and structure cooling device |
| WO2009045927A2 (en) * | 2007-09-28 | 2009-04-09 | Hobart Brothers Company | Parked aircraft climate control system and method |
| EP2256438A2 (en) * | 2009-05-29 | 2010-12-01 | Airbus Operations GmbH | Cooler, in particular for airplanes |
| CN102756807A (en) * | 2012-07-06 | 2012-10-31 | 中国航空工业集团公司西安飞机设计研究所 | Structure and application method of punching air inlet channel shared by liquid cooling system and environmental control system of airplane |
| CN203018161U (en) * | 2012-12-31 | 2013-06-26 | 中山市恒动机械制造有限公司 | Hydraulic system of double-shaft crusher |
| CN104121736A (en) * | 2014-07-18 | 2014-10-29 | 合肥天鹅制冷科技有限公司 | Liquid cooling source unit with function of precisely controlling temperature and control method |
-
2014
- 2014-12-08 CN CN201410746222.8A patent/CN104534757B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902087A (en) * | 2003-12-30 | 2007-01-24 | 空中客车德国有限公司 | Cooling system for the cooling of heat-producing devices in an aircraft |
| JP2007294887A (en) * | 2006-03-29 | 2007-11-08 | Dainippon Screen Mfg Co Ltd | Substrate cooling device and structure cooling device |
| WO2009045927A2 (en) * | 2007-09-28 | 2009-04-09 | Hobart Brothers Company | Parked aircraft climate control system and method |
| EP2256438A2 (en) * | 2009-05-29 | 2010-12-01 | Airbus Operations GmbH | Cooler, in particular for airplanes |
| CN102756807A (en) * | 2012-07-06 | 2012-10-31 | 中国航空工业集团公司西安飞机设计研究所 | Structure and application method of punching air inlet channel shared by liquid cooling system and environmental control system of airplane |
| CN203018161U (en) * | 2012-12-31 | 2013-06-26 | 中山市恒动机械制造有限公司 | Hydraulic system of double-shaft crusher |
| CN104121736A (en) * | 2014-07-18 | 2014-10-29 | 合肥天鹅制冷科技有限公司 | Liquid cooling source unit with function of precisely controlling temperature and control method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570479A (en) * | 2018-12-24 | 2019-04-05 | 常州卡斯特铝精密铸造科技有限公司 | Oil sump casting machine |
| CN110494023A (en) * | 2019-09-16 | 2019-11-22 | 合肥天鹅制冷科技有限公司 | A kind of liquid cooling equipment suitable for multi-model |
| CN111633464A (en) * | 2020-06-24 | 2020-09-08 | 昆山璟赫机电工程有限公司 | Cooling system of drilling machine |
| CN117806402A (en) * | 2023-12-28 | 2024-04-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electro-hydraulic thermal control method and system for aircraft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104534757B (en) | 2016-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104534757B (en) | A kind of control method of universal liquid cool equipment | |
| CN102354168B (en) | Electro-hydraulic control system of high/ low temperature test stand of automobile automation transmission valve body | |
| CN102428005B (en) | A kind of pretreated air unit that there is variable ratio frequency changer and drive | |
| CN104500508B (en) | Cooling circulation system of liquid cooling equipment and cooling method | |
| CN105386958B (en) | Compressor assembly | |
| CN112046785B (en) | Comprehensive test system for propeller-speed regulating system accessories and control method thereof | |
| CN102192215A (en) | Test system of airplane hydraulic power conversion device | |
| CN201281012Y (en) | Aviation high-pressure fuel pump test system | |
| CN104470333B (en) | A kind of compatible type aircraft liquid cool equipment | |
| CN104100512A (en) | Fuel pump test bed | |
| CN102944420A (en) | Dual-clutch automatic transmission hydraulic module performance test platform and method | |
| CN103926946A (en) | Automatic gas pressurizing device | |
| CN107514710A (en) | Modular integrated cold station | |
| CN104634023A (en) | Fluid flow control system and variable flow control method | |
| CN104197564A (en) | Water chilling unit with cooling unit module | |
| CN107489666A (en) | ROV small-sized hydraulic testboards | |
| CN111442919A (en) | Lubricating oil pump test bench | |
| CN204301345U (en) | A kind of cooling system of liquid cooling equipment | |
| CN102878739A (en) | Power control cabinet for water source heat pump air conditioner | |
| CN105114294A (en) | Intelligent water pump control cabinet of centralized energy supply system | |
| CN106016827B (en) | A kind of high/low temperature deep fat control system that temperature-controlled precision is high | |
| CN212963876U (en) | Test device for suppressing aircraft engine accessory shell | |
| CN210861901U (en) | Variable working condition energy efficiency test system of cold water supply system | |
| CN204006901U (en) | A kind of integral type refrigeration station system | |
| CN202710725U (en) | Oil injection generator oil source vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |