EP4370844A1 - Enceinte climatique a regulation thermique pour simulateur de mouvements et procede de regulation thermique, kit d'installation - Google Patents
Enceinte climatique a regulation thermique pour simulateur de mouvements et procede de regulation thermique, kit d'installationInfo
- Publication number
- EP4370844A1 EP4370844A1 EP22737509.4A EP22737509A EP4370844A1 EP 4370844 A1 EP4370844 A1 EP 4370844A1 EP 22737509 A EP22737509 A EP 22737509A EP 4370844 A1 EP4370844 A1 EP 4370844A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- climatic chamber
- thermoelectric assembly
- thermal regulation
- temperature
- face
- 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
Classifications
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- 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
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
-
- 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
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/001—Details of machines, plants or systems, using electric or magnetic effects by using electro-caloric effects
-
- 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
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
- F25B2321/021—Control thereof
-
- 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
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
- F25B2321/021—Control thereof
- F25B2321/0212—Control thereof of electric power, current or voltage
Definitions
- TITLE Climatic chamber with thermal regulation for motion simulator and thermal regulation process, installation kit
- the present invention generally relates to the field of metrology. It concerns a climatic chamber with thermal regulation which can be embedded in a motion simulator as well as a thermal regulation process. It may also relate to an installation kit for a climatic chamber with thermal regulation for a motion simulator. It has applications for the thermal characterization of equipment tested dynamically in a motion simulator.
- Motion simulators are rotating machines designed to test equipment that can be isolated inertial component type sensors or complete inertial systems, typically gyrometers, accelerometers, inertial units, etc. Most of these tests require temperature characterization in order to evaluate and be able to compensate for the thermal drift of the equipment, both statically, i.e. on a temperature level, and dynamically, i.e. on a temperature ramp. In both cases, temperature setpoint monitoring and temperature stability are important performance indicators. It is also preferable that the tests can be carried out over a very wide range of temperatures, for example between -55°C and +125°C.
- climatic chambers are conventionally implemented in which the equipment is installed, the climatic chamber being installed in a typically multi-axis motion simulator.
- the gas is lost after expansion in the climatic chamber and it is necessary to provide means for controlling the oxygen level in the ambient air in the case of N2 or the gas level used in the case of CO2 .
- the mechanical systems operate in a closed circuit, without the need to control the oxygen level in the air, and they use an evaporator in the climatic chamber, thus making it heavier and penalizing the dynamics as well as the bandwidth of the motion simulators.
- solenoid valves generally of the on/off type, to control the flow of liquid to the evaporator and therefore the cooling power in the climatic chamber. Piloting the solenoid valve can compromise position and speed stability performance by at least two phenomena that can be likened to shocks on the mechanical structure of the simulator:
- operation is not continuous, since it consists of a series of successive injection/evaporation cycles of refrigerant fluid in the evaporator in the case of mechanical refrigeration, or even liquid N2 or CO2 directly in the volume of the climatic chamber in the case of an open circuit. These cycles also cause a variation in the cooling capacity during the tests.
- pulse width modulation or PWM pulse width modulation
- PWM pulse width modulation
- An operating periodicity of several seconds is not negligible in view of the thermal inertia of the various constituents of the climatic chamber, and this results in inevitable temperature oscillations. Moreover, this periodicity also penalizes the bandwidth insofar as it induces a pure delay in the control of the system.
- thermoelectric modules also called Peltier modules
- thermoelectric cooling module has already been implemented in a motion simulator, but this was done by installing the thermoelectric module directly on the equipment to be tested for its temperature characterization. Cooling is therefore carried out by direct conduction on the equipment under test as is standard practice in electronics for thermoelectric modules. There was therefore no thermal regulation by a climatic chamber.
- the equipment to be tested is generally complex devices that may include materials on the surface with very different or low thermal conductivities and/or have irregular shapes limiting or preventing the direct attachment of one or more thermoelectric modules to the equipment.
- thermoelectric modules have certain limitations.
- single-stage thermoelectric modules do not produce more than 70-80°C of temperature difference, DT, between their cold and hot faces with powers of several hundred watts under ideal conditions.
- thermoelectric modules depend on the temperature of the hot face.
- a forced convection heatsink is often used on the hot side, but this cannot fall below the ambient temperature, which limits the amplitude of the low temperatures that can be reached on the cold side.
- thermoelectric assembly(ies) for in particular a motion simulator
- a secondary thermal regulation circuit which is applied to the/ to the external faces of the enclosure of the thermoelectric assembly(ies), and which comprises a means for cooling or heating a heat transfer fluid of said secondary thermal regulation circuit and for exchanging caloric energy (or "calories" in the following of the text) with said external face(s) of the thermoelectric assembly(ies).
- the thermoelectric assembly(ies) of the climatic chamber form a primary thermal regulation device.
- the interior of the climatic chamber, an interior which is subject to the internal face(s) of the thermoelectric assembly(ies), is preferably forced convection.
- the secondary thermal regulation circuit implements one or more thermoelectric regulation assemblies each comprising one or more thermoelectric modules.
- a climatic chamber with thermal regulation intended to test at least one piece of equipment comprising a wall defining an internal space containing a gas and able to receive and contain said at least one piece of equipment to be tested.
- thermoelectric assembly being thermally insulated from the environment outside the climatic chamber, in which at least one thermoelectric assembly is arranged through the wall of the climatic chamber, each thermoelectric assembly comprising two faces, an internal face disposed at the interior of the climatic chamber and an external face outside the climatic chamber, and in which one of the two faces, called the cold face, is intended to absorb caloric energy and the other, called the hot face, is intended rejecting heat energy as a function of electric current flowing through said at least one thermoelectric assembly, wherein a heat exchange end for r thermoelectric assembly external face of a secondary thermal regulation circuit is arranged in thermal contact with each thermoelectric assembly external face in order to exchange heat energy between said at least one thermoelectric assembly and said thermal regulation circuit secondary, the secondary thermal regulation circuit being external to the climatic chamber and comprising a heat transfer fluid circuit, a cold source, a hot source, a mixing device, a circulation pump and sensors, and in which a regulation system of the temperature of the enclosure is configured to control the electric current of said at least one thermo
- thermoelectric assembly arranged through, that is to say crossing, the wall of the climatic chamber must be understood in a functional sense which is to allow heat exchanges between the inside and the outside of the climatic chamber.
- the internal wall of the environmental chamber may be metallic and the thermoelectric assembly(ies) are arranged against the external face of the internal metallic wall by passing through a layer of thermal insulation also arranged on the external face of this internal metallic wall. .
- thermoelectric assembly comprises one or more thermoelectric modules also called Peltier,
- the secondary thermal regulation circuit therefore includes a heat exchange end for the external face of the thermoelectric assembly
- a gas mixing device is arranged inside the climatic enclosure in order to allow mixing of the gas inside the enclosure and on the internal face(s) of said at least one thermoelectric assembly,
- thermoelectric assembly each internal face of the thermoelectric assembly includes a finned radiator
- the heat transfer fluid has two phases, a gaseous and a liquid, in the secondary thermal regulation circuit,
- the external face is a hot face and the internal face is a cold face, caloric energy being extracted from the interior of the climatic chamber,
- the external face is a cold face and the internal face is a hot face, caloric energy being sent inside the climatic chamber,
- the gas mixing device comprises one or more fans
- the containment temperature regulation system also controls the gas circulation device in order to adjust the intensity of the gas circulation in the containment
- the internal space is thermally insulated from the environment outside the enclosure, including the motion simulator, the enclosure being fixed to the motion simulator by thermally insulating fasteners so as not to create a thermal bridge between the simulator movements and the interior of the climatic chamber,
- the climatic chamber is fixed on a mobile support of a movement simulator and the mobile support can be moved by means of joints of said movement simulator,
- the heat exchange end for the external face of the thermoelectric assembly is placed against the thermoelectric assembly and is therefore mobile following the thermoelectric assembly, the remainder of the secondary thermal regulation circuit being arranged outside the mobile parts of the movement simulator and being connected to the heat exchange end by mobile fluid joints passing through the joints of the simulator movements,
- the climatic chamber is fixed and is immobile, a motion simulator being installed in the climatic chamber and the equipment is installed on a support motion simulator and the equipment can be driven in motion by said motion simulator,
- the temperature of the hot source is adjustable and the temperature control system of the enclosure additionally regulates the temperature of the hot source
- the temperature control system of the enclosure is configured to regulate the temperature of the external face of the thermoelectric assembly as a function of the enclosure temperature setpoint and so that the polarity of the current flowing in said at least one thermoelectric assembly is constant, the internal face of the thermoelectric assembly being a cold face absorbing the caloric energy coming from inside the climate chamber,
- thermoelectric assembly external face temperature sensor a thermoelectric assembly external face temperature sensor
- each thermoelectric assembly includes a temperature sensor on the external face of the thermoelectric assembly, - each thermoelectric assembly is in contact with a heat exchange end for the external face of the thermoelectric assembly of the secondary thermal regulation circuit,
- thermoelectric assembly of the secondary thermal regulation circuit comprises a fluid outlet on the downstream side and a temperature sensor is arranged on the fluid outlet of the heat exchange end of the regulation circuit secondary thermal
- the heat exchange end for the external face of the thermoelectric assembly of the secondary thermal regulation circuit comprises a fluidic outlet on the downstream side and the temperature sensor of the external face of the thermoelectric assembly is placed on the fluidic outlet of the end heat exchange of the secondary thermal regulation circuit
- the containment temperature regulation system is configured to ensure a continuous flow of coolant in the heat exchange end of the secondary thermal regulation circuit
- the enclosure temperature regulation system is configured to control the flow rate of the heat transfer fluid while avoiding cavitation at high temperature of the heat transfer fluid which would be due to too high a speed of the heat transfer fluid, - the temperature of the enclosure is configured to linearize the opening/flow ratio of the three-way valve by means of an interpolation by piece in a tabulation (“Look-up table”),
- the climatic chamber includes at least one thermoelectric assembly through the climatic chamber - a thermoelectric assembly includes a thermoelectric module,
- thermoelectric assembly comprises several thermoelectric modules
- thermoelectric assembly comprising several thermoelectric modules, the thermoelectric modules are electrically connected in series or in parallel or according to a series-parallel arrangement, - the enclosure comprises at least two thermoelectric assemblies through the environmental chamber and the thermoelectric assemblies are electrically connected in parallel,
- thermoelectric assembly comprises twenty thermoelectric modules electrically connected in series
- the enclosure comprises two sets in parallel of five modules in series each,
- the enclosure temperature regulation system comprises at least two regulation loops, said at least two regulation loops being a main regulation loop controlling the electric current of said at least one thermoelectric assembly and at least one regulation loop secondary controlling the secondary thermal regulation circuit,
- the secondary regulation loop controlling the secondary thermal regulation circuit comprises a hot and cold sharing regulation loop and a flow regulation loop
- the motion simulator includes moving fluid joints and moving electrical connections
- the moving fluid joints are flexible pipes and the moving electrical connections are flexible electrical cables.
- the invention also relates to a method of thermal regulation of a climatic chamber intended to test at least one item of equipment, in which a climatic chamber with thermoelectric assembly(ies) according to the invention is implemented, in which the chamber climate being fixed on a mobile support of a motion simulator and the mobile support being able to be driven in motion by means of joints of said motion simulator, and in which a secondary thermal regulation circuit is also implemented comprising a heat exchange end for the external face of the thermoelectric assembly, the heat exchange end is arranged against the external face(s) of the thermoelectric assembly(ies), the rest of the secondary thermal regulation circuit being arranged outside the moving parts of the motion simulator and being connected to the heat exchange end by movable fluid joints passing through the joints of the motion simulator movements.
- the process can be declined according to all the procedural methods described or resulting from the functions of the material means implemented.
- thermoelectric assembly controls the electric current of said at least one thermoelectric assembly and which controls at least the mixing device and the circulation pump of the secondary thermal regulation circuit according to an enclosure temperature set point and sensor measurements.
- the invention finally relates to a kit for installing a climatic chamber in a motion simulator.
- kit for installing a climatic chamber with thermal regulation in a motion simulator the climatic chamber being intended to test at least one piece of equipment, the motion simulator comprising a driven mobile support in motion via joints of said motion simulator, which kit comprises: - a climatic chamber comprising a wall defining an internal space capable of receiving and containing said at least one item of equipment to be tested, the internal space possibly comprising a gas and being thermally insulated from the environment outside the climatic chamber, the climatic chamber comprising means of attachment to the mobile support, the enclosure further comprising at least one thermoelectric assembly, said at least one thermoelectric assembly being arranged through the wall of the climatic enclosure, each thermoelectric assembly comprising two faces, an internal face arranged inside the climatic chamber and an external face outside the climatic chamber, and in which one of the two faces, called the cold face, is intended to absorb heat energy and the other, called the hot face, is intended to reject caloric energy as a function of an electric current passing through said at least one thermoelectric
- thermoelectric assembly a secondary thermal regulation circuit comprising a heat transfer fluid circuit, means for connection to a cold source, a hot source, a mixing device, a circulation pump and sensors, the heat transfer fluid circuit comprising an exchange end heat for external face of thermoelectric assembly intended to come into thermal contact with an external face of thermoelectric assembly in order to exchange heat energy between said at least one thermoelectric assembly and said secondary thermal regulation circuit,
- thermoelectric assembly intended to control the electric current of said at least one thermoelectric assembly and to control at least the mixing device and the circulation pump of the secondary thermal regulation circuit according to a temperature setpoint enclosure and sensor measurements.
- the kit may also include a cold source.
- the enclosure of the kit may also comprise a gas mixing device, said gas mixing device being arranged inside the climatic enclosure in order to allow mixing of the gas inside the enclosure and on the internal faces of said at least one thermoelectric assembly.
- FIG. 1 schematizes the primary thermal regulation device with a thermoelectric assembly of the environmental chamber, the latter being embedded in a motion simulator not shown, one heat exchange end of a secondary thermal regulation circuit also being represented,
- FIG. 2 schematizes the secondary heat transfer fluid thermal regulation circuit, external to the climatic chamber, which is intended to exchange heat energy with the hot face of the thermoelectric assembly
- FIG. 3 schematizes an example of implementation with three control loops.
- the system of the invention comprises thermal regulation of the internal volume of the climatic chamber by series/cascade of two thermal regulation means: a first, called primary thermal regulation device and a second, called circuit secondary thermal regulation.
- the secondary thermal regulation circuit it is possible to heat or cool the primary thermal regulation device, which makes it possible to increase the temperature range that can be reached in the climatic chamber as well as the thermal power available.
- the primary thermal regulation device which is static in its own operation, implements at least one thermoelectric assembly to be able to control the temperature inside the climatic chamber.
- at least one temperature sensor is arranged in the climatic chamber.
- the internal face of each set is placed inside the climatic chamber and the external face of each set is placed outside the climatic chamber.
- the internal face is the cold face and the direction of the current passing through the thermoelectric assembly is therefore imposed by the fact that the cold face, the one which “sucks up” the calories, is on the internal side of/in the climatic chamber .
- the internal face can become a hot face or a cold face by reversing the polarity of the current passing through the thermoelectric assembly(ies).
- a mobile climatic chamber is described primarily because it is installed in a motion simulator and with a primary thermal regulation device, the internal face of the thermoelectric assembly(ies) of which is a cold face.
- the climatic chamber is integral with the movement simulator and it is therefore mobile according to the movements of the joints of the simulator, typically according to the axes of rotation and/or translation, and according to the way in which they are controlled.
- the motion simulator is typically multi-axis.
- the climatic chamber is filled with a gas. This gas can be air, ambient air, or one or more specific gases other than air.
- the climatic chamber which can be opened, in particular for setting up the equipment, and closed, thermally insulates the inside of the chamber from the outside environment.
- the interior of the climatic chamber may be airtight and gastight and may be able to withstand a depression or an overpressure compared to the exterior, in particular for additional (de)pressure tests on the equipment.
- a sealed climatic chamber can also allow the introduction of specific gas(es), for example nitrogen or argon, for additional tests of the tightness of the equipment itself, in particular in search of leaks or risks of contamination in the equipment.
- the climatic chamber is not designed to be sealed against overpressure and depression, the gaseous exchanges between the interior and the exterior at the equilibrium of the pressures between the interior and exterior being however reduced and in such a case, the internal gas is typically air and it is at the atmospheric pressure of the environment.
- each thermoelectric assembly 10 which in FIG. 1 is the inner face 11, comprises a heat exchange surface which is preferably extended by the presence of a radiator 1.
- the heat exchanges inside the climatic chamber 3 are preferably favored by a device for mixing the gas 2 internal to the climatic chamber 3, typically at least one fan blowing or sucking on the exchange surface. Forced convection is therefore implemented in climatic chamber 3.
- Radiator 1 is a heat sink of the type used for cooling power components in electronics, for example a finned radiator.
- thermoelectric assembly 10 The hot face of the thermoelectric assembly 10, the one that "rejects” the calories “aspirated” by the cold face, is arranged outside the climatic chamber and corresponds to the external face 14 of the thermoelectric assembly 10. Each thermoelectric assembly is therefore placed through the wall of the climatic chamber and avoiding the creation of a thermal bridge between the interior and the exterior of the climatic chamber.
- thermoelectric assembly(ies) passes through the joints of the movement simulator and implements electrical connections with contacts or collectors, for example rotating or sliding, or a transmission of electrical energy without contact by induction or any other means. adequate.
- thermoelectric assemblies It is advantageous to implement several thermoelectric assemblies and to wire the thermoelectric assemblies in series to increase the supply voltage and thus reduce the electrical current circulating, thus limiting the wear of the electrical slip rings arranged in the joints of the motion simulator and EMC noise that may be generated. It is also possible by suitable wiring between the thermoelectric assemblies and by using individually addressable individual control means, one for each thermoelectric assembly, to reduce the total number of electrical connections necessary, for example two for a power supply bus and one for a data link.
- the data may include instructions sent to the individual control means and sensor measurements with identifiers, the sensors being placed in the motion simulator and in particular in the climatic chamber.
- each thermoelectric assembly comprises its own cold face temperature sensor and its own current regulation.
- control of the power of the thermoelectric assemblies is done globally for all the thermoelectric assemblies, a single internal face temperature sensor or several temperature sensors with averaging of the internal face measurements being implemented. work and the current for all the thermoelectric assemblies which are therefore globally regulated.
- thermoelectric assembly consists of several thermoelectric elements, there is no individual regulation of each element (no sensor + element current regulation), the regulation being done on the thermoelectric assembly as a whole, and preferably individually (one regulation per assembly) in the case of the implementation of several thermoelectric assemblies in the system. Concerning the external faces of thermoelectric assemblies in a system to several thermoelectric assemblies, they are in parallel on the secondary thermal regulation circuit.
- Thermal insulation materials can be implemented to constitute the climatic chamber 3.
- the climatic chamber 3 can be single-component in a material with low thermal conductivity or be multilayer with for example an external thermal insulation layer and a wall internal metal, possibly connected to the cold face, which can also promote the distribution of heat in the enclosure.
- the purpose of the primary thermal regulation device is multiple:
- thermoelectric assembly(ies) Finely and quickly regulate the temperature in the climatic chamber, thanks to the low thermal inertia of said device and the linear and continuous operation of the thermoelectric assembly(ies).
- thermoelectric assembly(ies) Widen the temperature range offered by the secondary thermal regulation circuit alone, by working with the DT of the thermoelectric assembly(ies) in addition.
- the secondary thermal regulation circuit 9 exemplified in FIG. 2 uses a heat transfer fluid, and this circuit is intended to introduce or extract heat energy from the external face 14 of the thermoelectric assembly(ies) 10.
- This secondary thermal regulation circuit 9 has a heat exchange end 4 for outer face 14 of thermoelectric assembly 10.
- the fluid supplied by the secondary thermal regulation circuit against the outer face 14 of each thermoelectric assembly can be at a low temperature, for example -10° C or less, -20°C, or high, for example 80°C, or even more, 120°C, or any other temperature in between.
- the heat transfer fluid which is a liquid, is designed to preferably remain in the liquid phase over the entire temperature range envisaged.
- thermoelectric assemblies Ethylene glycol, methylene glycol, Coolanol®.
- the fluids used have the advantage of being able to be heated and cooled at least in relation to the ambient temperature. In this way, it is possible to increase the operating thermal amplitude of thermoelectric assemblies while maintaining correct thermal/caloric power. It is also possible to use thermoelectric assemblies with several thermoelectric elements thermally mounted in series/in cascade, which also makes it possible to obtain a greater thermal amplitude but to the detriment of the thermal power.
- thermoelectric assembly 10 the heat exchange end 4 for external face 14 of thermoelectric assembly 10 is divided into several entities, each entity being arranged on an external face 14 of thermoelectric assembly 10 and in this case, these different entities are in parallel so that the different thermoelectric assemblies receive heat transfer fluid at the same temperature.
- thermoelectric assembly(ies) 10 of the climatic chamber 3 Given therefore that the heat exchange end 4 for the external face 14 is against the thermoelectric assembly(ies) 10 of the climatic chamber 3, it must follow the movements of this climatic chamber.
- the secondary thermal regulation circuit 9 only the heat exchange end 4 is placed on a moving part because against the thermoelectric assembly(ies) of the enclosure placed in the motion simulator, the rest of the secondary thermal regulation circuit 9 preferably being fixed, outside the motion simulator. It is understood that fluidic circuits or connections with movable fluidic joints connect the two by crossing and/or passing through the joints of the movement simulator.
- the secondary thermal regulation circuit 9 comprises the following elements, the terms upstream and downstream being defined with reference to the direction of circulation of the heat transfer fluid imposed by the pump 15 of the circuit:
- thermoelectric assembly 10 for external face 14 of thermoelectric assembly 10, possibly in several entities in parallel in the case where there are several thermoelectric assemblies.
- An active means of ensuring the circulation of a heat transfer fluid in the example shown it is a circulation pump 15 controlled by the speed of the heat transfer fluid.
- the circulation of the fluid is passive by using the difference in density between the cold fluid and the hot fluid.
- a phase change of the fluid is used for the circulation of the fluid.
- a heat exchanger heater or hot source 12 to possibly heat the heat transfer fluid it receives for example a circulation heater or, preferably, counter-circulation. Any other means of heating the heat transfer fluid can be used, for example by Joule effect with an electrical resistance, by electromagnetic radiation in particular with a suitable heat transfer fluid.
- a controlled mixer device 13 making it possible to adjust the temperature of the circulating heat transfer fluid, for example a three-way valve.
- thermoelectric assembly(ies) in intensity and possibly polarity, according to measurements of the sensors and a temperature setpoint.
- this enclosure temperature regulation system is shared between the primary thermal regulation device and the secondary thermal regulation circuit 9.
- the secondary thermal regulation circuit is configured with two opposite ends, on one side, the heat exchange end 4 for external face 14 already presented and, on the other side, a cold inlet connected to a water group ice forming the cold source 8.
- the cold source may or may not be temperature adjustable.
- This cold source 8 makes it possible to bring the heat transfer fluid to a low temperature, possibly and preferably negative in degrees Celsius.
- the heat transfer fluid thus brought to low temperature is in fluidic relationship with an upstream side of the three-way valve 13.
- This three-way valve has an upstream side 16 towards the cold source 8, has a downstream side 17 towards the pump 15, the source 12 then the heat exchange end 4 and comprises a recirculation side 15 connected to the return circuit 18 channeling the heat transfer fluid having passed through the heat exchange end 4.
- the upstream side 16 and the recirculation side 15 are coolant inlets, the ratio of the respective flow rates of which can be adjusted.
- the downstream side 17 is a heat transfer fluid outlet.
- the three-way valve 13 makes it possible to control, by introducing more or less cold, the temperature of the heat transfer fluid which is sent to the heat exchange end 4 thanks to the pump 15 arranged on the downstream side of the three-way valve then through the heater heat exchanger or hot source 12, before reaching the heat exchange end 4.
- the hot source 12 makes it possible to heat the heat transfer fluid passing through it.
- the hot source 12 may or may not be adjustable in temperature.
- the three-way valve makes it possible to control the rate of recirculation of the fluid having passed through the heat exchange end 4 with respect to the fluid coming from the chilled water unit via the cold inlet or cold source 8.
- the temperature of the fluid on the downstream side 17 of the three-way valve can be made colder with respect to the recirculating heat transfer fluid (that emerging from the heat exchange end 4), by increasing the flow coming from the upstream side 16 of the three-way valve 13
- the heat exchanger heater or hot source 12 makes it possible to heat the heat transfer fluid coming from the downstream side 17 of the three-way valve through the pump 15.
- the three-way valve 13 therefore makes it possible to control the quantity of fluid at the outlet of the chilled water unit and it is therefore an actuator making it possible to control "the cooling power".
- "The cooling power" provided by the three-way valve is linearized in terms of opening by the use of a "Look-up-table” in order to optimize the regulation.
- the pump in other locations, for example by reversing the pump 15 and the heat exchanger heater 12 or by placing the pump 15 in the return circuit 18.
- the temperature sensors 5a, 5b, 5c, 5d are placed:
- upstream side 16 of the three-way valve to measure the temperature of the heat transfer fluid coming from the chilled water unit of the cold inlet 8.
- the possibility of being able to regulate the temperature at the heat exchange end 4 of the secondary thermal regulation circuit 9 it is possible to optimize the overall efficiency of the system by shifting the temperature adjustment point of the secondary thermal regulation circuit according to the climatic chamber temperature set point.
- the ability to change the temperature set point of the secondary thermal control circuit helps to avoid reversing the polarity of the current flowing in the thermoelectric assemblies as much as possible, thus extending their life by avoiding stress. mechanical due to the inversion of operation and the functional inversion from hot face to cold face and vice versa.
- the regulation system implements both the secondary thermal regulation circuit 9 and the primary thermal regulation device with thermoelectric assembly(ies) to regulate according to measurements and a temperature setpoint, the temperature in the 'climatic chamber.
- the two actuators (three-way valve and heater heat exchanger) of the secondary thermal regulation circuit and the associated sensors make it possible to create a regulation/control loop. hot and cold sharing control, the purpose of which is to regulate the temperature of the fluid in the heat exchange end 4.
- the specific setpoint of this regulation loop is based on a criterion for optimizing the operating point of the regulation device primary thermal function of the temperature setpoint for the climatic chamber.
- Another flow control loop allows the pump 15 to be controlled according to the flow rate. This regulation is necessary to avoid cavitation at high temperature of the fluid, the saturated vapor pressure being able to be very different between the two temperature extremes of the secondary thermal regulation circuit 9. Limiting the flow rate of heat transfer fluid in the pipes is also useful to reduce their wear and to reduce the energy consumption of the pump 15.
- the pressure sensor 7 and the flowmeter 6 arranged on the return circuit 18 make it possible to monitor the state of the secondary thermal regulation circuit 9, in particular of the cold part on the cold inlet side, due to possible freezing of the fluid, leaks, and other issues.
- the same heat transfer fluid is used at the cold inlet and at the heat exchange end for the external face of the thermoelectric assembly.
- the fluids can be separated between these two ends by using a heat exchanger between the two.
- other secondary thermal regulation circuit structures can be used by those skilled in the art to supply a heat transfer fluid to the heat exchange end 4 in a range of suitable controllable temperatures.
- a second three-way valve can be provided connected to a hot source of heat transfer fluid.
- the containment temperature control system therefore comprises several partially interdependent control loops.
- the main regulation loop acts on the primary thermal regulation device and relates to the regulation of the internal temperature, denoted T of the climatic chamber, which is done by applying a regulated current and/or voltage to the assemblies.
- thermoelectrics in practice Peltier components.
- the main regulation loop can act globally on all the thermoelectric assemblies or also act individually by a local loop individual to each thermoelectric assembly.
- the enclosure temperature setpoint T ic provided by the user is preferably filtered, generally by a low-pass filter also called setpoint filter, and the result of this filtering T icf is compared with T b and the difference T icf - supplies a first corrector C which can be of the proportional integral (PI) or proportional integral derivative (PID) type, or of another type, and which will calculate the current and/or voltage command sent to the thermoelectric assemblies.
- PI proportional integral
- PID proportional integral derivative
- a hot and cold sharing regulation loop is implemented for the control of the secondary thermal regulation circuit.
- a second corrector C 2 is used for the regulation of T e.
- the setpoint T ec of this loop depends on the setpoint T ic and is calculated by means of a piecewise interpolation (“Look-up table”) in a tabulation.
- the water flow rate of the internal circuit is controlled by means of a third flow regulation loop including in this example a PI or PID type corrector denoted C 3.
- the setpoint of this loop is denoted D c.
- the actuator of this loop being the voltage and/or the current of the pump of the secondary thermal regulation circuit.
- “Puiss. res. external” corresponds to the power control of the electrical resistance (heat source). Note that it is possible to use a heat exchanger heater other than an electrical resistance and that in this case the control will be adapted according to result. Still for the second corrector C 2 , “Valve opening degree” corresponds to the opening/closing command and degree of opening of the three-way valve (cold source).
- U pump corresponds to a voltage control in this example but more generally a current and/or voltage control can be provided.
- the invention it is possible to obtain temperature variation speeds within the climatic chamber which are very high, of the order of 5° C./min, and cycles making it possible to pass from the temperature ambient or colder at 100°C and vice versa, in stages, with a regulation accuracy of less than 0.5°C.
- the heat exchange end further comprises/in addition, a device for direct heat exchange with the interior of the enclosure and which is connected to the rest of the circuit fluidic circuit of the secondary thermal regulation circuit 9 by means of a controlled valve in order to obtain an accelerated temperature setting of the enclosure, the controlled valve then cutting off the fluidic circuit and leaving the thermoelectric assembly(ies) to act in concert with the secondary thermal regulation circuit 9 as described above.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Temperature (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2107561A FR3125110B1 (fr) | 2021-07-12 | 2021-07-12 | Enceinte climatique à régulation thermique pour simulateur de mouvements et procédé de régulation thermique, kit d’installation |
| PCT/EP2022/069348 WO2023285398A1 (fr) | 2021-07-12 | 2022-07-11 | Enceinte climatique a regulation thermique pour simulateur de mouvements et procede de regulation thermique, kit d'installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4370844A1 true EP4370844A1 (fr) | 2024-05-22 |
| EP4370844B1 EP4370844B1 (fr) | 2025-06-11 |
Family
ID=77711079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22737509.4A Active EP4370844B1 (fr) | 2021-07-12 | 2022-07-11 | Enceinte climatique à regulation thermique pour simulateur de mouvements et procédé de régulation thermique, kit d'installation |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240318876A1 (fr) |
| EP (1) | EP4370844B1 (fr) |
| FR (1) | FR3125110B1 (fr) |
| WO (1) | WO2023285398A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117219923B (zh) * | 2023-09-25 | 2024-10-18 | 国网江苏省电力有限公司涟水县供电分公司 | 一种电力储能设备温度调节装置 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3252504A (en) * | 1964-12-30 | 1966-05-24 | Borg Warner | Thermoelectric air conditioning systems |
| JP3422262B2 (ja) * | 1998-08-28 | 2003-06-30 | 株式会社島津製作所 | 試料冷却装置 |
| KR20080008871A (ko) * | 2006-07-21 | 2008-01-24 | 한라공조주식회사 | 열전소자 모듈을 이용한 자동차용 보조 냉난방장치 |
| DE102010026601A1 (de) * | 2010-07-09 | 2012-01-12 | Volkswagen Ag | Temperieren einer Vielzahl von Komponenten eines Kraftfahrzeugs |
| WO2015002850A1 (fr) * | 2013-07-05 | 2015-01-08 | Rubin Jacob A | Interface complète corps humain-ordinateur |
| IT201700078655A1 (it) * | 2017-07-13 | 2019-01-13 | Aetna Group Spa | Sistema e metodo per ottimizzare l’avvolgimento con film di carichi pallettizzati |
| CA3057475C (fr) * | 2018-10-05 | 2025-05-06 | Thermtest Inc. | Dispositif et procédé de régulation de la température |
| US11493242B2 (en) * | 2018-11-27 | 2022-11-08 | Aktiebolaget Skf | Cooling system for a refrigerant lubricated bearing assembly |
| KR101999644B1 (ko) * | 2019-01-31 | 2019-10-01 | 한화시스템 주식회사 | 이종센서 영상탐색기 시험평가를 위한 hils 시스템 및 그 운용 방법 |
| IL272829A (en) * | 2020-02-20 | 2021-08-31 | Cool Wear Therapeutics Ltd | Cool device |
| JP7668622B2 (ja) * | 2020-04-28 | 2025-04-25 | 株式会社Kelk | 診断システム |
| JP2022022551A (ja) * | 2020-06-26 | 2022-02-07 | シスメックス株式会社 | 核酸検出方法、核酸検出装置及びモジュール |
-
2021
- 2021-07-12 FR FR2107561A patent/FR3125110B1/fr active Active
-
2022
- 2022-07-11 WO PCT/EP2022/069348 patent/WO2023285398A1/fr not_active Ceased
- 2022-07-11 US US18/579,016 patent/US20240318876A1/en active Pending
- 2022-07-11 EP EP22737509.4A patent/EP4370844B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3125110A1 (fr) | 2023-01-13 |
| FR3125110B1 (fr) | 2023-07-07 |
| US20240318876A1 (en) | 2024-09-26 |
| WO2023285398A1 (fr) | 2023-01-19 |
| EP4370844B1 (fr) | 2025-06-11 |
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