WO2012166144A1 - Système et procédé pour refroidir une enceinte de réfrigération compartimentée - Google Patents

Système et procédé pour refroidir une enceinte de réfrigération compartimentée Download PDF

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Publication number
WO2012166144A1
WO2012166144A1 PCT/US2011/038902 US2011038902W WO2012166144A1 WO 2012166144 A1 WO2012166144 A1 WO 2012166144A1 US 2011038902 W US2011038902 W US 2011038902W WO 2012166144 A1 WO2012166144 A1 WO 2012166144A1
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WO
WIPO (PCT)
Prior art keywords
compartment
temperature
refrigeration
moving device
air moving
Prior art date
Application number
PCT/US2011/038902
Other languages
English (en)
Inventor
Jean Philippe GOUX
Roland MOTTAL
Original Assignee
Carrier Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carrier Corporation filed Critical Carrier Corporation
Priority to US14/122,351 priority Critical patent/US20140305147A1/en
Priority to PCT/US2011/038902 priority patent/WO2012166144A1/fr
Priority to CN201180071292.2A priority patent/CN103703330A/zh
Priority to EP11727027.2A priority patent/EP2715255A1/fr
Publication of WO2012166144A1 publication Critical patent/WO2012166144A1/fr

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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/003—Transport containers
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/123—Sensors measuring the inside temperature more than one sensor measuring the inside temperature in a compartment

Definitions

  • the subject matter disclosed herein relates generally to transport refrigeration and, in one embodiment, to a refrigeration enclosure with multiple cargo compartments and a refrigeration system to facilitate variable cooling of the cargo compartments.
  • Refrigerated cargo containers utilize a refrigeration unit to maintain the interior volume or environment of the cargo container at a desired temperature.
  • a wide variety of products ranging for example from freshly picked produce to deep frozen seafood, are commonly shipped in refrigerated truck trailers and other refrigerated freight containers.
  • refrigerated truck trailers and other refrigerated freight containers.
  • some cargo containers are compartmentalized into two or more separate cargo compartments.
  • Conventional transport refrigeration units include a refrigerant compressor, a condenser, and a main evaporator.
  • the refrigeration unit When used in connection with compartmentalized refrigerated cargo containers, however, the refrigeration unit is often outfitted with one or more remote evaporators.
  • Such systems are often called “reversible multi-temperature systems" because the temperatures of the various compartments (usually frozen temperatures on a first compartment and fresh temperatures on a second compartment) can be reversed.
  • the remote evaporators reside proximate each of the compartments, thereby providing individualized temperature control.
  • each evaporator may further consist of an evaporator coil, an expansion device, solenoid valves, a heating system, one or more fans, an optional drain heater, a return air temperature sensor, and a defrost functionality that includes an additional temperature sensor for end-defrost monitoring.
  • Alternative configurations of refrigeration units deploy a fan or "bulkhead fan” in place of at least one of the remote evaporators.
  • Systems with the bulkhead fan are "non- reversible multi-temperatures systems," where the forward compartment temperature is lower than the aft compartment temperature.
  • the bulkhead fan is coupled to a locally oriented temperature sensor, i.e., a temperature sensor that senses temperature of only one compartment. The temperature sensor indicates changes in temperature of the cargo compartment, which in turn changes the operation of the bulkhead fan unit.
  • embodiments of the refrigeration enclosure couples a fan unit to the control structure of the refrigeration unit. This configuration reduces the cost of the multi-component refrigeration system and insures an accurate temperature control in each of the compartments of the compartmentalized refrigeration enclosure.
  • FIG. 1 is a top, schematic view of an exemplary embodiment of a refrigeration enclosure having a compartmentalized structure and equipped with a refrigeration system;
  • FIG. 2 is a perspective view, partly in section, of the refrigeration enclosure of Fig. 1 in position on a truck;
  • FIG. 3 is a schematic diagram of a control diagram for use in controlling a refrigeration system in a refrigeration enclosure such as the enclosure of FIGS. 1 and 2;
  • FIG. 4 is a flow diagram of an exemplary method for cooling a refrigeration enclosure such as the enclosure of FIGS. 1 and 2;
  • FIG. 5 is a flow diagram of another exemplary method for cooling a refrigeration enclosure such as the enclosure of FIGS. 1 and 2.
  • Figs. 1 and 2 depict an exemplary refrigeration enclosure 100 that is made in accordance with the present disclosure.
  • the refrigeration enclosure 100 includes a cargo box 102 that has a partition wall 104, which subdivides the volume of the cargo box 102 into one or more cargo compartments 106 including a first compartment 108 (or "forward compartment 108") and a second compartment 110 (or "aft compartment 110").
  • the partition wall 104 has a plurality of openings 112, which facilitate airflow between the forward compartment 108 and the aft compartment 110.
  • Each of the cargo compartments 106 has an access point, generally identified by the numeral 116, in the form of panels and/or doors that provide access into the respective cargo compartment 106 to facilitate loading and unloading of cargo therein.
  • the refrigeration enclosure 100 also includes a refrigeration system 118 that regulates the environment within each of the respective cargo compartments 106.
  • the refrigeration system 118 includes a refrigeration unit 120 and an air moving device 122 proximate at least one of the openings 112. Examples of the air moving device 122 include a fan 124 or impeller.
  • the refrigeration system 118 also includes an airflow regulator 126 (or "air flap 126"), which regulates airflow through one or more of the openings 112.
  • the air flap 126 permits airflow in only one direction such as from the forward compartment 108 to the aft compartment 110 or vice versa.
  • the refrigeration unit 120 includes a condensing unit 128 and a forward evaporator 130 in flow connection with the interior of the forward compartment 108.
  • the condensing unit 128 has a housing 132 that is secured to the exterior of the cargo box 102 as in conventional practice.
  • the housing 132 encases a compressor 134 and a condenser 136, as well as related components which an artisan skilled in the refrigeration art will recognize, and thus details are not necessary.
  • the refrigeration system 118 also has a control device 138 and one or more sensors that provide inputs respecting operating conditions (e.g., temperature, pressure, and humidity) inside of the cargo compartments 106.
  • the sensors can include a forward temperature sensor 142 and an aft temperature sensor 144 that are responsive to the cargo temperature of, respectively, the forward compartment 108 and the aft compartment 110.
  • the present example identifies the cargo temperature for the forward compartment 108 as Tp and the cargo temperature of the aft compartment 110 as T A .
  • control device 138 In response to the inputs from the sensors 140, the control device 138 generates control signals that selectively control and/or operate, e.g., the fan 124, the condensing unit 128, and/or the forward evaporator 130, as discussed more below.
  • Operation of the refrigeration system 118 causes an airflow pattern 146 that defines the movement of air among and between the cargo compartments 106.
  • the airflow pattern 146 includes an aft flow 148 and a forward flow 150.
  • the former i.e., the aft flow 148, may result from rotation of the fan 124 drawing air from the forward compartment 108 and dispersing (and mixing) the air into the aft compartment 110.
  • the forward flow 150 describes the flow of air from the aft compartment 110 to the forward compartment 108 to equalize the pressure inside of the aft compartment 110.
  • the refrigeration enclosure 100 can be incorporated onto a truck 152 for transport of the cargo stored therein.
  • a power source such as a generator can be coupled to the engine (or drive train) of the truck 152.
  • the power source generates sufficient electrical power required by, e.g., the fan 124 and the compressor 134, as well as other parts of the refrigeration system 118.
  • the power source comprises a single on-board engine driven synchronous generator that produces at least one AC voltage at one or more frequencies.
  • Embodiments of the refrigeration enclosure 100 lend themselves to other transport vehicles.
  • the refrigeration enclosure 100 may be embodied as a refrigerated transport trailer attached to and hauled by a suitably configured tractor (i.e., "tractor trailer") or as a refrigerated freight container of compartmentalized design for transporting perishable product by ship and/or rail and/or intermodally.
  • tractor i.e., "tractor trailer”
  • refrigerated freight container of compartmentalized design for transporting perishable product by ship and/or rail and/or intermodally.
  • the refrigeration enclosure 100 will focus on the dual-compartment configurations of the cargo box 102, it is to be understood that the variants of the cargo box 102 may have more than two compartments.
  • the control device 138 may include a microprocessor board that includes the microprocessor, an associated memory, and an input/output board that contains an analog-to- digital converter. Other configurations are likewise contemplated in which one or more of these devices are combined within a single integrated circuit (e.g., a chip, chip-on-chip package, and the like).
  • the control device 138 may also include drive circuits, field effect transistors ("FET"), relays, and other discrete devices (e.g., transistors, resistors, capacitors) that are arranged to implement control features associated with the refrigeration system 118.
  • FET field effect transistors
  • the control device 138 comprises a Micro LinkTM controller available from Carrier Corporation, Farmington, Connecticut, USA. However, the particular type and design of the control device 138 is within the discretion of the artisans skilled in the refrigeration arts and familiar with the cooling and refrigeration.
  • control device 138 operates the refrigeration system 118 in response to various operating parameters including, but not limited to, set points for each of the forward compartment temperature T F and the aft compartment temperature T A .
  • These operating parameters may be pre-set or pre-selected such as by factory calibration.
  • Alternative embodiments may permit user initiated changes and/or implementation of specific operating parameters such as might be beneficial to account for variations in the use and operation of the refrigeration enclosure 100 (e.g., based on the ambient temperature of the surrounding environment).
  • the operating parameters may distinguish between the temperature of the forward compartment 108 and the aft compartment 110.
  • the forward compartment 108 can be maintained at a temperature suitable for use with frozen items (e.g., perishable frozen foods) and the aft compartment 110 can be maintained at a temperature suitable for use with refrigerated items (e.g., fruits, vegetables, and perishable non-frozen foods).
  • the operating parameters will include a first set point from about -18 °C to about -25 °C for the forward compartment temperature T F and a second set point from about 0 °C to about 12 °C for aft compartment temperature T A .
  • the control device 138 may implement various algorithms to regulate the cargo temperature for each of the forward compartment 108 and the aft compartment 110.
  • the memory may store these algorithms in the form of executable instructions such as software and/or firmware, which are available for execution, e.g., by the microprocessor.
  • the algorithm compares the input from the sensors 140 (e.g., the forward temperature sensor 142 and the aft temperature sensor 144) to the operating parameters (e.g., set points for each of the forward compartment temperature T F and the aft compartment temperature T A ).
  • the algorithm initiates the control device 138 to generate one or more control signals which effectuate operation of the components of the refrigeration system 118.
  • the control signals cause rotation and/or variations in the speed of rotation of the fan 124.
  • Activation of the fan 124 mixes air from the forward compartment 108 with air in the aft compartment 110.
  • the forward compartment temperature is less than the aft compartment temperature
  • mixing of air acts to lower or "pull-down" the cargo temperature of the aft compartment 110. Pull-down may continue until the aft compartment temperature T A reaches the desired cargo temperature as, e.g., designated by the set point discussed above.
  • the algorithm initiates the control device 138 to generate one or more control signals that stop rotation of the fan 124 in response to lowering of the aft compartment temperature T A to at, about, or near (e.g., within a certain tolerance) the set point for the aft compartment temperature T A .
  • Suitable algorithms can also prioritize operation of the components of the refrigeration system 118.
  • the algorithm prioritizes cooling of the cargo compartments 106, and in one construction cooling of the forward compartment 108 is prioritized over cooling of the aft compartment 110. That is, the algorithm is configured to first ensure that the forward compartment temperature Tp meets (and/or is within acceptable tolerances of) the set point established for the forward compartment 108.
  • the pull-down of the forward compartment temperature T F (or "forward pull-down") may require that at least the forward evaporator 130 is active, which provides cooling air to the forward compartment 108.
  • the algorithm may initiate the control device 138 to generate control signals that cause the aft compartment temperature T A to meet (and/or is within acceptable tolerances of) the set point established for the aft compartment 110.
  • the pulldown of the aft compartment temperature T A may require operation of the fan 124, as discussed above. In other examples, the aft pull-down may require simultaneous operation of the fan 124 and the forward evaporator 130 to maintain the forward compartment temperature Tp.
  • FIG. 3 provides a schematic diagram of one configuration of hardware platform 200 for use in, e.g., the refrigeration system 118.
  • the hardware platform 200 includes a control device 202 (e.g., the control device 138), which includes a processor 204, a memory 206, and control circuitry 208 configured for general operation of a refrigeration system (e.g., refrigeration system 118).
  • the control circuitry 208 comprises an evaporator control circuit 212, a fan control circuit 214, a condenser control circuit 216, and a sensor circuit 218.
  • the control circuitry 208 includes a comparator circuit 220 such as for comparing inputs received by the sensor circuit 218 to set points that indentify certain operating conditions for the compartments of the refrigeration enclosure.
  • One or more buses 222 couple together all of these components, allowing each component to communicate with one or more of the other components as necessary.
  • the hardware platform 200 further includes sensors 224, which includes a first temperature sensor 226 and a second temperature sensor 228.
  • the hardware platform 200 also includes refrigeration components 230 such as a fan 232, an evaporator 234, and a compressor 236.
  • Examples of the hardware platform 200 may also have a control panel 238, which is coupled to the control device 202, and includes one or more refrigeration system controls such as a first control 240 and a second control 242.
  • the control device 202 effectuates operation of one or more of the refrigeration components 230 such as in response to inputs from the sensors 224 and/or the control panel 238.
  • the comparator circuit 220 indicates deviations in the temperature of the various compartments of the refrigeration enclosure. Deviations may require the control device 202 to generate one or more control signals, which communicate via the buses 222, to change operation of the refrigeration unit (e.g., the fan 232, the evaporator 234, and the compressor 236). The change in operation can change the operating conditions of the compartments.
  • the refrigeration unit e.g., the fan 232, the evaporator 234, and the compressor 236
  • the hardware platform 200 and its constructive components communicate amongst themselves and/or with other circuits (and/or devices), which execute high-level logic functions, algorithms, as well as firmware and software instructions.
  • Exemplary circuits of this type include, but are not limited to, discrete elements such as resistors, transistors, diodes, switches, and capacitors, as well as microprocessors and other logic devices such as field programmable gate arrays ("FPGAs") and application specific integrated circuits ("ASICs"). While all of the discrete elements, circuits, and devices function individually in a manner that is generally understood by those artisans that have ordinary skill in the electrical arts, it is their combination and integration into functional electrical groups and circuits that generally provide for the concepts that are disclosed and described herein.
  • the electrical circuits of the control device 202 can often physically manifest logical operations, which facilitate the changes in operation of the components of the refrigeration unit. These electrical circuits can replicate in physical form an algorithm, a comparative analysis, and/or a decisional logic tree, each of which operates to assign an output (e.g., the control signals) and/or a value to the output (e.g., the control signals) such as to turn the fan 232 on and off, to vary the speed of the fan 232, to activate the evaporator 234, and/or to activate the compressor 236.
  • an output e.g., the control signals
  • a value to the output e.g., the control signals
  • the processor 204 is a central processing unit (CPU) such as an ASIC and/or an FPGA.
  • the processor 204 can also include state machine circuitry or other suitable components capable of receiving inputs from, e.g. the control panel 238.
  • the memory 206 includes volatile and non-volatile memory and can be used for storage of software (or firmware) instructions and configuration settings.
  • Each of the evaporator control circuit 212, the fan control circuit 214, the condenser control circuit 216, the sensor circuit 218, and the comparator circuit 220 can embody stand-alone devices such as solid-state devices. These devices can mount to substrates such as printed-circuit boards, which can accommodate various components including the processor 204, the memory 206, and other related circuitry to facilitate operation of the control device 202 in connection with its implementation in the refrigeration enclosure.
  • FIG. 3 shows the processor 204, the memory 206, the evaporator control circuit 212, the fan control circuit 214, the condenser control circuit 216, the sensor circuit 218, and the comparator circuit 220 as discrete circuitry and combinations of discrete components, this need not be the case.
  • one or more of these components can be contained in a single integrated circuit (IC) or other component.
  • the processor 204 can include internal program memory such as RAM and/or ROM.
  • any one or more of functions of these components can be distributed across additional components (e.g., multiple processors or other components).
  • the control and operation of the fan 232 is integral with the control and operation of the evaporator 234 and the rest of the refrigeration system.
  • Such integration can occur by way of algorithms and proportional-integral-derivative (PID) control schemes.
  • PID proportional-integral-derivative
  • One example of a PID control scheme has a three-term control structure that generates a PID output, which in turn initiates the control signals that vary the operation of the refrigeration components 230.
  • the three-term control structure represents one or more mathematical algorithms in the form of multiple "modules" that can individually (or collectively) contribute to the overall value of the PID output.
  • an exemplary mathematical algorithm for use in connection with the three-term control structure is presented. It is contemplated, however, that other algorithms are likewise compatible with the scope and spirit of the concepts of the present disclosure.
  • the modules can include a proportional control module, an integral control module, and a derivative control module.
  • each of the modules provides a "term.” Manipulation of the terms (individually or collectively) is effective to modify or change the value of the PID output, and in turn the value of the control signals that the control device 202 delivers to the various components of the refrigeration system.
  • the control signal can, in one example, activate and deactivate, e.g., the fan 232.
  • the PID output is defined in accordance with Equation (1) below: u(t)— P OUT + I OUT + D T OUT Equation (1) where u( t) is a value for the PID output, P OUT is a proportional term of the PID output, I OUT is an integral term of the PID output, and D OUT is the a derivative term of the PID output.
  • each of the terms corresponds to a gain parameter that is assigned a value in response to inputs from, e.g., the sensors 224 discussed above.
  • the proportional term P OUT can change the PID output in proportion to an error value.
  • the error value defines a change in the temperature of the compartments (e.g., the forward compartment temperature TF and the aft compartment temperature TA).
  • the proportional term P OUT is defined in accordance with Equation (2) below:
  • Equation (2) PQ UT K p6 ⁇ f) , Equation (2) where K p is the proportional gain parameter, e is the error value, and t is time and/or instantaneous time.
  • the integral term I out can modify the PID output in proportion to both the magnitude of the error value and the duration of the error value over time.
  • the integral term I out is defined in accordance with Equation (3) below:
  • K t is the integral gain parameter
  • e is the error value
  • t is time or instantaneous time
  • T is a dummy integration value
  • the derivative parameter D ouh also known as rate and/or rate term, can change the PID output based on the rate of change of the error value such as by determining the slope of the error value over time.
  • the derivative term D out is defined in accordance with Equation (4) below:
  • K d is the derivative gain parameter
  • e is the error value
  • t is time or instantaneous time
  • Each of the proportional control module, the integral control module, and the derivative control module can be configured as electrical circuitry. Utilizing discrete elements such as resistors and capacitors, processors such as ASICs and FPGAs, as well as combinations of various electrical devices, these modules can effectuate the changes, calculations, determinations the various parameters described above. These elements and components are selected in connection with the relevant theory of PID control and the PID control schemes described herein.
  • Fig. 4 depicts a flow diagram for an exemplary method 300 that is useful for cooling a refrigeration enclosure, e.g., the refrigeration enclosure 100 (Fig. 1).
  • the method 300 includes, at block 302, receiving an input and, at block 304, generating a first control signal to change a first operating parameter of the refrigeration enclosure.
  • the method 300 also includes, at block 306, generating a second control signal to change a second operating parameter of the refrigeration enclosure.
  • the method 300 further includes, at block 308, monitoring the first operating parameter and the second operating parameter such as, for example, at block 310, receiving feedback in the form of the inputs (e.g., at block 302).
  • the inputs arise from sensors, e.g., temperature sensors, which monitor the operating conditions (e.g., the environment) in each of the cargo compartments (e.g., the cargo compartments 106).
  • the inputs can be received at the same time, such as when the refrigeration enclosure is configured for concurrent monitoring of each of the forward compartment temperature Tp and the aft compartment temperature T A .
  • this arrangement forms a feedback loop in which inputs from the sensors are received continually. This feedback loop permits rapid response to changes in the operating parameters.
  • values for the control signal are set based a change in one or more of the forward compartment temperature Tp and the aft compartment temperature T .
  • This change may indicate deviation of the respective temperature from, e.g., the set points of the forward compartment 108 and the aft compartment 110. Responsive to this deviation, the first control signal and the second control signal can effectuate operation of, respectively, the forward evaporator 130 and the fan 124.
  • Fig. 5 illustrates a flow diagram of another exemplary method 400.
  • the inventors use like numerals to identify like components as between Fig. 4 and Fig. 5, but the numerals are increased by 100.
  • the method 400 includes, at block 402, receiving an input, at block 404, generating a first control signal, at block 406, generating a second control signal and, at block 408, monitoring the operating parameters.
  • the method 400 further includes, at block 412, receiving a first input from a first compartment and, at block 414, receiving a second input from a second compartment.
  • the method 400 also comprises, at block 416, comparing the inputs (e.g., the first input and the second input) to a set point such as a first set point and a second set point for, respectively, the first compartment and the second compartment.
  • the method 400 also includes steps for prioritizing operating conditions of the compartments such as, for example, prioritizing the first compartment over the second compartment. In one example, prioritization can occur in the method 400, at block 420, determining whether the first input varies from the first set point.
  • the method 400 continues to block 404, generating the first control signal.
  • the method 400 continues, at block 422, determining whether the second input varies from the second set point. If the second input is different from the first set point, then the method 400 continues to block 406, generating the second control signal.
  • the inventors find that prioritizing and selecting between the compartments of the refrigeration enclosure can ensure proper cooling.
  • the forward compartment is maintained at a lower temperature than the aft compartment.
  • This configuration is typical of refrigeration enclosures used for frozen foods (e.g., the forward compartment) and non-frozen foods (e.g., the aft compartment).
  • priority can be given to the frozen food compartment.
  • cold air is only drawn from the frozen food compartment when the frozen food compartment is at sufficient temperature, e.g., does not deviate from the set point.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
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  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention porte sur une enceinte de réfrigération, laquelle enceinte comprend une boîte de chargement avec une paroi de séparation qui subdivise la boîte de chargement en compartiments. Dans un mode de réalisation, l'enceinte de réfrigération comprend un système de réfrigération ayant une unité de réfrigération pour refroidir l'un des compartiments et un dispositif de déplacement d'air disposé à proximité de la paroi de séparation pour faciliter un écoulement d'air à partir du premier compartiment vers le second compartiment. Le système de réfrigération comprend de plus un dispositif de commande couplé à chacun du dispositif de déplacement d'air et de l'unité de réfrigération. Le dispositif de commande délivre des signaux de commande qui font varier le fonctionnement de chacun du dispositif de déplacement d'air et de l'unité de réfrigération en réponse à des variations dans les conditions de fonctionnement (par exemple, la température) à l'intérieur de chacun des compartiments.
PCT/US2011/038902 2011-06-02 2011-06-02 Système et procédé pour refroidir une enceinte de réfrigération compartimentée WO2012166144A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US14/122,351 US20140305147A1 (en) 2011-06-02 2011-06-02 System And Method For Cooling A Compartmentalized Refrigeration Enclosure
PCT/US2011/038902 WO2012166144A1 (fr) 2011-06-02 2011-06-02 Système et procédé pour refroidir une enceinte de réfrigération compartimentée
CN201180071292.2A CN103703330A (zh) 2011-06-02 2011-06-02 用于冷却分隔的制冷包封体的系统和方法
EP11727027.2A EP2715255A1 (fr) 2011-06-02 2011-06-02 Système et procédé pour refroidir une enceinte de réfrigération compartimentée

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WO2017218788A1 (fr) * 2016-06-15 2017-12-21 Wal-Mart Stores, Inc Systèmes et procédés de régulation de températures de produits pendant la distribution
GB2569510A (en) 2016-10-04 2019-06-19 Walmart Apollo Llc Systems and methods utilizing nanotechnology insulation materials in limiting temperature changes during product delivery
US10959395B2 (en) * 2017-06-23 2021-03-30 Smithway, Inc. Poultry curtain trailer system
WO2024081630A1 (fr) * 2022-10-11 2024-04-18 Cargill, Incorporated Système de refroidissement pour des remorques frigorifiques et véhicule pour transporter une cargaison réfrigérée

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