250results about How to "Efficient cooling" patented technology

The invention discloses a cutting-stirring friction welding composite processing device for a floating double-shaft-shoulder double-stirring needle and a manufacture method thereof, and particularly relates to a combined or composite processing device capable of simultaneously carrying out milling or cutting processing and stirring friction welding processing and a method thereof. The cutting-stirring friction welding composite processing device for the floating double-shaft-shoulder double-stirring needle integrates a cutting system or a milling system, a stirring friction welding system, a forced cooling system, a gas protection system, a temperature sensing system, a pressure induction system, a milling liquid supply system and a sensing-free system. The cutting-stirring friction welding composite processing device has functions of temperature control, gas protection, pressure detection, cooling liquid protection, milling head replacing and floating double-shaft-shoulder self-supporting stirring friction welding. The method for carrying out cutting-stirring friction welding composite processing on workpieces can meet strength requirements of mechanical processing of ferrous light metal materials, carbon steel materials and alloy steel materials. The cutting-stirring friction welding composite processing device for a floating double-shaft-shoulder double-stirring needle and the manufacture method of the cutting-stirring friction welding composite processing device reduce manufacture procedures, save processing cost, have the advantages of being high in efficiency, excellent in quality, high in stability and saving in energy, break through limitation of conventional machining technology, form a new method and a new thought for machinery processing, and have wide application prospects in industries of heating, air conditioners, ice manufacture, freshness keeping, medicine preparation, construction, aquatic products and foods.

The invention discloses a solution-spraying type air-conditioner heat pump unit, belonging to the field of refrigerating air-conditioning equipment. The solution-spraying type air-conditioner heat pump unit is technically characterized in that with the adoption of the solution spraying, the unit diffuses condensation heat to the environment in summer and takes heat from the outdoor air environment in winter; and the solution is regenerated by the using of exhausted gas of the compressor or hot water manufactured by the unit. Compared with an air source heat pump unit, the solution-spraying type air-conditioner heat pump unit has the obvious characteristics that the refrigeration efficiency is high, the continuous heating operation can be realized without defrosting in winter and the heating efficiency is high, and in addition, the structure of the unit is compact and the early-investment of the equipment is low.

The invention relates to a frost-free type refrigerant two-circulation fresh air conditioning unit. An air source heat pump circulation compressor, an air source heat pump circulation four-way reversing valve, a refrigerant channel of an outdoor heat exchanger, an air source heat pump circulation throttling device and a refrigerant channel of a first air supply coil form a refrigerant circulation loop of an air source heat pump circulation unit. A heat recovery and circulation compressor, a heat recovery and circulation four-way reversing valve, a refrigerant channel of a heat recovery coil, a heat recovery and circulation throttling device and a refrigerant channel of a second air supply coil form a refrigerant circulation loop of a recovery heat pump circulation unit. An air channel of the first air supply coil and an air channel of the second air supply coil are connected to an air supply duct. An air channel of the heat recovery coil is connected to an exhaust duct. According to the frost-free type refrigerant two-circulation fresh air conditioning unit, the unit is made to have two different evaporation temperatures due to two kinds of refrigerant circulation, heat can be absorbed from indoor exhaust air and ambient air, and the problem that a conventional heat recovery heat exchanger frosts is solved.

The invention discloses a device and a method for measuring the superconducting transition temperature of a high temperature superconducting material, and belongs to the field of superconducting electronics. The method comprises the following steps that: the high temperature superconducting material to be measured is put into a closed vacuum chamber and is refrigerated by a compression refrigerating machine; a constant current source applies current to the high temperature superconducting material to be measured; a voltage measuring instrument sends the voltage data of the high temperature superconducting material to be measured to an acquisition and processing system; a temperature measuring instrument receives and displays the temperature of the high temperature superconducting materialto be measured, which is measured by a temperature sensor, and sends the temperature to the acquisition and processing system; and the acquisition and processing system stores the temperature data and the voltage data of the high temperature superconducting material to be measured, which are sent by the temperature measuring instrument and the voltage measuring instrument, and generates the change curve of the resistance of the high temperature superconducting material to be measured along with the temperature, so that the superconducting transition temperature of the high temperature superconducting material to be measured is determined. By the device and the method, the superconducting transition temperature of the high temperature superconducting material to be measured can be accurately measured, and certain practical value for the performance inspection of the prepared high temperature superconducting material is achieved.

The invention relates to a solution spray type heat pump set, belonging to the field of refrigerating and air conditioning equipment. The solution spray type heat pump set has the technical characteristics that the set radiates condensed heat to the environment in summer and takes heat from the outdoor air environment in winter by using solution spray, and the solution is regenerated by using heat released by recooling a high-pressure liquid refrigerant. Compared with an air source heat pump unit, the solution spray type heat pump set has the obvious characteristics of compact set structure, low initial equipment investment, high energy efficiency ratio for refrigeration operation in summer, no need of defrosting in winter, efficient, continuous and stable refrigeration operation and the like.

The invention proposes a liquid-cooling system of a server. The system comprises a housing, a cooling apparatus arranged in the housing and used for cooling the server, and a pressure adjustment apparatus arranged outside the housing, connected with the housing and used for adjusting the pressure in the housing. According to the system, the pressure in the liquid-cooling system is automatically maintained by integrating the pressure adjustment apparatus and the liquid-cooling system, so that the server can be effectively refrigerated and the sealing reliability of the housing can be ensured.

The invention provides a combined circulating energy supplying system, and belongs to the technical field of heat energy utilization and heat pumps. An air-steam forward circulating system is constituted by an air compressor, a boiler, an air turbine, a steam turbine, a waste heat boiler, a circulating pump and a heat exchanger, a compressed backward circulating system is constituted by a compressor , a second condenser, an evaporator, a low-temperature throttling valve, a second low-temperature throttling valve and a low-temperature heat exchanger, and an absorption type backward circulating system is constituted by an absorber, a generator, a condenser, the evaporator, a throttling valve, a solution pump and a solution heat exchanger; the air-steam forward circulating system provides power for the compressed backward circulating system and provides driving heat load for the absorption type backward circulating system, the compressed backward circulating system obtains low temperature heat load and respectively provides heat for the outside through the second condenser and the absorption type backward circulating system through the evaporator, and the absorption type backward circulating system provides the heat for the outside through the absorber and the condenser, so that the combined circulating energy supplying system is formed.

The invention discloses cutting-stirring friction-welding combined machining equipment and a manufacturing method thereof. The cutting-stirring friction-welding combined machining equipment integrates a milling system or a cutting system, a stirring friction-welding system, a forced cooling system, a gas protection system, a temperature sensing system, a pressure sensing system, a milling liquid supply system and a non-sensing system. The invention provides a united or combined machining device which can carry out milling or cutting and stirring friction-welding in parallel simultaneously and a method thereof. The cutting-stirring friction-welding combined machining equipment has the functions of temperature control, gas protection, pressure detection, cooling liquid production, milling head replacement and dual-shaft shoulder self-supporting. According to the manufacturing method of the cutting-stirring friction-welding combined machining equipment, the manufacturing processes are reduced and the machining cost is saved. The limitation of the conventional mechanical machining technology is broken through, and a new method and a new idea about the mechanical manufacturing and machining are formed. The cutting-stirring friction-welding combined machining equipment and the manufacturing method in the invention have wide engineering applications to the heating industry, the air conditioning industry, the ice making industry, the freshness retaining industry, the pharmacy industry, the construction industry, the aquatic product industry and the food industry.

The invention relates to a computer server heat dissipation system and a method for heat-dissipating and cooling the computer server heat dissipation system. The computer server heat dissipation system comprises a control module, a temperature sensing module, a server and a plurality of heat dissipation devices arranged on a server cabinet, wherein each heat dissipation device comprise a compressor, a condenser and an evaporator, the compressor is a direct-current variable frequency compressor, a work power supply of the heat dissipation device is input from the server, the temperature sensing module is used for monitoring the surface temperature of an internal electronic component of the server, the control module comprises a sensing module and an execution module which is connected with the sensing module, the sensing module is used for sensing variation of the utilization rate of the internal electronic component of the server during working and monitoring variation of a working current of a server mainboard, and the execution module is used for processing signals transferred by the sensing module and the temperature sensing module and controlling the running of the heat dissipation devices. With the adoption of the computer server heat dissipation system, refrigeration can be rapidly and effectively carried out, electric energy is saved, and the heat dissipation efficiency is improved; and in addition, the computer server heat dissipation system has a simple structure and a small volume, is high in efficiency and is convenient to install and maintain.

The invention provides a combined circulating energy supply system and belongs to the technical field of heat energy utilization and heat pumps. An air turbine device forward circulating system is formed by an air compressor, a boiler and an air turbine mechanism. A compressing type reverse circulating system is formed by a compressor, a second compressor, a second condenser, an evaporator, a low-temperature throttling valve, a second low-temperature throttling valve and a low-temperature heat exchanger. An absorbing type reverse circulating system is formed by an absorber, a generator, a condenser, the evaporator, a throttling valve, a solution pump and a solution heat exchanger. Air turbine device forward circulation supplies power to compressing type reverse circulation, and supplies driving heat loads to absorbing type reverse circulation. Compressing type reverse circulation obtains low-temperature heat loads, supplies heat outwards through the second condenser and supplies heat to absorbing type reverse circulation through the evaporator. Absorbing type reverse circulation supplies heat outwards through the absorber and the condenser, and the combined circulating energy supply system is formed.

A portable refrigeration and insulation unit includes a hollow cartridge with a sealed cavity and a top wall including a plurality of wells extending from the top wall. The wells are configured to receive and thermally treat food or beverage items, in particular slush beverage products, where each well is suitably contoured so as to contact a majority of outer surface area portions of a food or beverage item that is placed within the well. The cartridge cavity includes a heat transfer material that surrounds portions of the wells and facilitates heat transfer from food or beverage items placed within the wells to the heat transfer material during operation of the portable unit. The unit further includes an outer insulating case that receives the cartridge and provides additional insulation features. The cartridge is cooled to achieve a suitable temperature, is loaded with food or beverage items, and is placed within the case for use in a foodservice environment.

The present disclosure relates to an air conditioner selectively operating with respect to an area, a cloud server, and an operation method thereof. The air conditioner according to an embodiment of the present disclosure classifies an air blowing area of the air conditioner into an intensive air blowing area and a non-intensive air blowing area by determining the intensive air blowing area basedon a sensed distance and direction relative to an occupant in the air blowing area of the air conditioner and determining the other area as the non-intensive air blowing area, instructs the air conditioner to operate in an intensive operation mode with respect to the intensive air blowing area, and to operate in an operation mode distinguished from the intensive operation mode with respect to theintensive air blowing area and non-intensive air blowing area when an operation performed in the intensive operation mode is completed.

The invention belongs to the field of underground engineering, and particularly relates to a determination test device for freezing force of the contact surface between an underground structure in a natural frozen soil area and a manual frozen soil reinforcing area and frozen soil and a determination method of the freezing force determination test device. A soil sample is pressed by a hydraulic soil sample presser to be uniform in compactness, hollow layers of a three-layer organic glass constant temperature preservation cover are filled with refrigerants and foaming materials to achieve constant temperature preservation for frozen soil, right-angle pits with different depths are horizontally and annularly turned in the outer wall of a steel pipe model pile to simulate structures with different roughness degrees, thermocouple temperature sensors are embedded at different height and different direction positions on the side wall of the steel pipe model pile to accurately determine the pile and soil contact surface temperature, and the thermocouple temperature sensors, a pressure sensor and a vertical displacement sensor are connected with a digital collection instrument to synchronously determine the pile-soil contact surface temperature, the pile top vertical load and pile-soil relative displacement changes. The freezing force determination test device is simple in structure, stable and reliable in performance, wide in application range, and capable of accurately determining the freezing force and freezing strength between frozen soil at different temperatures and the structures with different roughness degrees.

The invention relates to a metal cutting machining system. The metal cutting machining system comprises a workbench, driving control equipment, flutter detection equipment and circulating equipment. The workbench comprises an oil feeding device, a main shaft box, a rotary workpiece, a drill rod, a drill rod support, a feeding seat, a bearing table, a machine tool body, a center frame and a slidingseat. The driving control equipment comprises a motion controller, an encoder, a Hall current sensor, a decoding circuit, an optical coupling isolation circuit, a servo motor and an intelligent powercontrol module. A target position, an actual position and actual current are subjected to single-axis logic control in the motion controller. A pulse width modulation signal is output through the time sequence regulation of vector control. The flutter detection equipment comprises an industrial personal computer, a vibration sensor and an audio sensor. The vibration sensor and the audio sensor are arranged on the feeding seat of the workbench so as to measure mechanical vibration signals and noise signals of cutter cutting and transmit the mechanical vibration signals and the noise signals tothe industrial personal computer. The industrial personal computer judges whether cutting is normal or not according to the mechanical vibration signals and the noise signals.

The invention discloses a pump motor cooling noise reduction device based on a pulsating heat pipe principle. The main structure of the pump motor cooling noise reduction device lies in that a pulsating heat pipe cooling device in spatial arrangement is designed on the shell of a motor; a pulsating heat pipe mainly comprises a spatially warped multi-bend closed passage, wherein the cooling section of the passage is arranged in a water tank, the included angle between the water tank and the horizontal plane is 30 to 90 degrees, and an inlet and an outlet are formed in the water tank, so that circulation and constant-temperature control can be realized. The heating section of the pulsating heat pipe is directly adhered onto the outer surface of a motor shell, the position of a condensation section is always on the upper side of the heating section, and an included angle of 30 to 90 degrees can be presented with the horizontal plane. Moreover, the cross section of the closed passage can be designed into circular and rectangular cross sections. The device is to carry out efficient cooling treatment on the motor, and an existing motor with a fan cooling structure is replaced, so that low noise operation is realized. The structure has the characteristics that the device is detachable and is convenient to maintain.

The invention relates to improvement on a cooling device of a gyroscope stabilizing device, and the cooling device is suitable for cooling other similar products. The gyroscope stabilizing device mainly depends on inertia of a high-speed rotating flywheel inside to output a moment of force reverse to a ship shaking direction to achieve the purpose of stabilizing the ship. Bearing support and motordrive are needed for realizing high-speed rotation of the large-inertia flywheel, and a bearing and a motor generate a great deal of heat during high-speed rotation. Meanwhile, in order to reduce airresistance, a rotor needs to package in a low-pressure vacuum environment or a low-density gas environment, and sufficient heat exchange is difficulty realized as heat dissipation of the high-speed rotary part under the vacuum environment is difficult. The cooling device disclosed by the invention is that a movable heat dissipation sheet and a movable heat dissipation sheet are arranged on the gyroscope stabilizing device, and a sealed gas circulating channel is formed between the movable heat dissipation sheet and the movable heat dissipation sheet, so that a high-speed rotating heating partis efficiently cooled through a convection mode under the vacuum low-pressure environment or the low-density gas environment.

The invention relates to the technical field of refrigeration, and provides a compound refrigeration device based on thermoelectric refrigeration and magnetocaloric refrigeration of thermal switches.The compound refrigeration device comprises a thermoelectric / magnetocaloric compound refrigeration structure, wherein the opposite sides of the thermoelectric / magnetocaloric compound refrigeration structure are taken as the cold end and the hot end respectively, and the cold end and the hot end are both provided with the thermal switches used for conducting or blocking heat. The compound refrigeration device furthermore comprises a pulsed power source for applying periodic current to the thermoelectric / magnetocaloric compound refrigeration structure and a magnet system for conducting periodicmagnetizing or demagnetizing, and the pulsed power source and the magnet system cooperate with the thermal switches to control the cold end of the thermoelectric / magnetocaloric compound refrigerationstructure to carry out continuous refrigeration. The invention furthermore provides a compound refrigeration method based on thermoelectric refrigeration and magnetocaloric refrigeration of the thermal switches. The compound refrigeration method comprises the four steps of S1, S2, S3 and S4. By means of the compound refrigeration device and method, high-efficiency double compound refrigeration ofthermoelectric / magnetocaloric compound refrigeration and magnetocaloric refrigeration is achieved, and the refrigeration performance of the device can be greatly improved.

A cold rolling lubricant for zinc and zinc alloy foil is characterized by adopting No. 5 industrial white oil as basic oil and compounding multiple kinds of composite additives including an anti-wear agent, an oily agent, an antioxidation and corrosion prevention agent, an anti-foam agent, an anti-emulsification agent and a friction improver. The cold rolling lubricant has good cooling, cleaning, lubricating, diffusing, high temperature resisting and stable thermooxidizing performances, can better keep certain continuity and thickness of an oil film, reduces friction coefficient and phenomena of adhesion between a roller and a rolled piece during cold rolling, and can satisfy requirements on board shape and surface finishment.

The invention belongs to the technical field of thermal radiation, and particularly relates to a dynamic thermal radiation refrigeration device based on phase change material vanadium dioxide. According to the dynamic thermal radiation refrigeration device based on the phase change material vanadium dioxide, on the basis of the classic metal-medium-metal metasurface structural design, a transition medium layer is introduced to effectively improve the adhesive force of a phase change material vanadium dioxide film; and the whole device is adjusted and controlled to correspond to the peak value of the black body radiance at the room temperature through selection of the medium layer material, and therefore, the technical problem that an existing heat radiation refrigeration device is relatively poor in refrigeration effect is effectively solved. According to the dynamic thermal radiation refrigeration device based on the phase change material vanadium dioxide, when the temperature is higher, energy is radiated outwards through an intermediate infrared 8-14 micron atmosphere window, and sunlight is reflected; when the temperature is lower, energy is hardly radiated outwards, so that the functions of intelligent temperature control and dynamic refrigeration are achieved; the device has the characteristics of intelligent dynamic temperature control, simple structure, convenience in large-area preparation, zero energy consumption, polarization insensitivity and the like; and the device is of great significance in solving the problem of excessive refrigeration and relieving the urban heat island effect, and has application potential in the fields of infrared camouflage and the like.

The invention discloses a host machine of an air cooling and water cooling type cold and hot water air conditioner, comprising a compressor, a four-way valve, an electromagnetic valve, a double-pipe heat exchanger, a fin type heat exchanger, a one-way valve, a liquid reservoir, an electronic expansion valve, an enthalpy increasing plate exchange unit, a plate exchange unit and an air distributing member, wherein the four-way valve is arranged between the compressor and the air distributing member; the other end of the four-way valve is connected with the plate exchange unit; the other end of the plate exchange unit is connected together with the fin type heat exchanger and the double-pipe heat exchanger through the electromagnetic valve respectively; a one-way valve assembly is further disposed between the fin type heat exchanger and the plate exchange unit; and the one-way valve assembly is connected with the liquid reservoir and the enthalpy increasing plate exchange unit. The host machine of the air cooling and water cooling type cold-hot water air conditioner disclosed by the invention can satisfy different demands of users; in addition, a modular design has the advantages of high precision, high efficiency, high reliability, compact structure, flexible use, convenient operation, and the like.

The invention provides a cold accumulation bed and a magnetic refrigeration system. The cold accumulation bed comprises a first chamber and a second chamber, wherein the first chamber comprises a first region and a second region, the second chamber comprises a third region and a fourth region, a first magnetic working medium and a fourth magnetic working medium both made of positive effect magneto-thermal materials are arranged in the first region and the fourth region respectively, and second magnetic working medium and third magnetic working medium both made of negative effect magneto-thermal materials are arranged in the second region and the third region respectively; and the cold accumulation bed is further provided with a first magnetic generating device, wherein the cold accumulation bed and the first magnetic generating device can move relative to each other, when being opposite to the first region and the third region, the first magnetic generating device is not opposite to the second region and the fourth region, and when being opposite to the second region and the fourth region, the first magnetic generating device is not opposite to the first region and the third region. According to the cold accumulation bed and the magnetic refrigeration system, magnetizing and demagnetizing effects on the magnetic working media can be realized at the same time, the refrigeratingtime or the heating time of the system is prolonged, and the problem that the refrigerating time of a flow path of the single cold accumulation bed is short is solved.

The invention provides a combined cycle energy supply system and belongs to the technical field of heat energy utilization and heat pumps. A steam power device positive cycle system is formed by a turbine, a boiler, a heat exchanger and a circulating pump. A compression type reverse cycle system is formed by a compressor, a cooler, an expander, a low-temperature heat exchanger and a heat regenerator. An absorption type reverse cycle system is composed of an absorber, a second absorber, a generator, a second generator, a condenser, an evaporator, a throttling valve, a solution pump, a second solution pump, a solution heat exchanger and a second solution heat exchanger. The steam power device positive cycle supplies power to the compression type reverse cycle and supplies drive heat loads to the absorption type reverse cycle. The compression type reverse cycle acquires low-temperature heat loads and supplies heat through the cooler. The absorption type reverse cycle acquires low-temperature heat loads and supplies heat through the absorber, the second absorber and the condenser. Thus, the combined cycle heat supply system is formed.

The invention belongs to the technical field of air-conditioning cooling and heating machines, in particular to an air source cooling and heating machine. The air source cooling and heating machine comprises an outdoor heat exchanger 5; wherein the outdoor heat exchanger 5 adopts an annular structure; a baffle 34 is arranged at the annular notch portion of the outdoor heat exchanger; a lining fiber 7 is arranged on the lower part of a cavity of the outdoor heat exchanger 5, and a compressor 8, a reversing valve 6 and a throttling part 9 are wrapped by the lining fiber 7; an outdoor exhaust fan18 is arranged on the upper part of the outdoor heat exchanger 5; and a solar heat absorbing coating is arranged on the outdoor heat exchanger 5. The air source cooling and heating machine has a large heat dissipating surface area per unit volume, can receive the heat of sunlight without frosting during work, and has high work efficiency and low noise, indoor air dehumidification water is used for condensation and heat dissipation in summer, defrosting water is used for indoor humidification in winter, the functions of waste heat for heating water, exchanging of fresh air and automatic cleaning are achieved, and the air source cooling and heating machine is suitable for carbon dioxide circulation

The invention provides a combined cycle energy supply system, and belongs to the technical field of thermal energy utilization and heat pumps. A steam power device forward cycle system is composed of a turbine, a boiler, a condenser and a cycle pump. A compression type reverse cycle system is composed of a compressor, a cooler, an expansion machine, a low-temperature heat exchanger and a heat regenerator. An absorption type reverse cycle system is composed of an evaporator, an absorber, a generator, a condenser, a throttle valve, a solution pump and a solution heat exchanger. The steam power device forward cycle system provides power for the compression type reverse cycle system or provides a driving heat load for the absorption type reverse cycle system. The compression type reverse cycle system obtains the low-temperature thermal load and supplies heat to the outside through the cooler. The absorption type reverse cycle system absorbs the low-temperature thermal load and supplies heat to the outside through the absorber and the condenser, and the combined cycle energy supply system is formed.

The invention discloses an efficient air exhaust cooler which comprises an engine air exhaust duct, a mixer and a heat radiator, wherein the mixer is provided with an air exhaust inlet, an air exhaust outlet, a cooling liquid inlet and a cooling liquid outlet; the engine air exhaust duct is communicated with the air exhaust inlet; the cooling liquid outlet is communicated with the cooled liquid inlet of the heat radiator; and the cooled liquid outlet of the heat radiator is communicated with the cooling liquid inlet. According to the invention, the exhaust air in a thermal motive system can be cooled, liquefied and / or solidified efficiently.

By means of the present invention, a cooling device (9) is realized, that prevents the fresh food compartment (10) to be cooled unnecessarily while the door (12) of the fresh food compartment (10) is open, that prevents formation of frost on the first evaporator (7) even when the user keeps the door (12) of the fresh food compartment (10) open frequently and / or for a long time while the compressor (1) is operating, thus decreasing the requirement of performing a special defrost cycle, furthermore that directs the refrigerant fluid only to the freezing compartment (11) while the door (12) of the fresh food compartment (10) is open during the refrigeration cycle, enabling preferably to maintain additional cooling in the freezing compartment (11), that enables the compressor (1) to be used more effectively, enabling a more effective refrigeration to be performed and hence providing energy saving.

The invention discloses a piezoelectric drive type miniature thermoacoustic refrigerator. The piezoelectric drive type miniature thermoacoustic refrigerator is mainly composed of a piezoelectric buzzer, resonator tubes, a regenerator and heat exchangers. The piezoelectric buzzer, the hot-end resonator tube and the hot-end heat exchanger are sequentially connected; the regenerator is located between the hot-end heat exchanger and the cold-end heat exchanger; the rear portion of the cold-end heat exchanger is connected with the resonator tube with one open end and one closed end, and therefore the thermoacoustic refrigerator forms a closed loop and standing waves are generated in the loop. According to the related knowledge of the thermoacoustic theory, a pump heating effect is generated in the regenerator through the standing waves, so that a temperature difference is generated between the two ends of the regenerator, and the refrigeration effect is achieved through heat exchange between the cold-end heat exchanger and the outside as well as between the hot-end heat exchanger and the outside. The refrigerator is simple in structure, free of any moving component, miniaturized, environmentally friendly, and suitable for heat dissipation of electronic elements.

A refrigeration system comprises a display case having a viewing area with the first side and a second side. An air outlet on the first side guides air across the viewing area to an air inlet on the second side. A first fan and a second fan communicate with the air inlet. A volume extends between the air inlet and the first and second fans. The partition divides this volume between the first and second fan.