67 results about "Refrigerant" patented technology

An evaporator with a cool storage function includes flat refrigerant flow tubes and flat cool storage material containers each brazed to one side surface of the corresponding refrigerant flow tube. A plurality of sets each composed of refrigerant flow tubes and a cool storage material container are disposed such that they are spaced from one another. A fin is disposed in an air-passing clearance between adjacent sets, and is joined to the corresponding refrigerant flow tubes and the corresponding cool storage material container. Front portions of the cool storage material containers and the fins project frontward from the refrigerant flow tubes, and an internal-volume-increasing portion, whose container height is greater than that of the container body portion, is provided at the frontward projecting portion of each cool storage material container. Fins are brazed to opposite side surfaces of the internal-volume-increasing portion of each cool storage material container.

A cooling system for a vehicle comprises a compressor for compressing refrigerant, the compressor being adapted to be driven by a power source installed in the vehicle, a condenser for receiving compressed refrigerant from the compressor, an expansion device for expanding refrigerant from the condenser, and a liquid-to-liquid heat exchanger for receiving refrigerant from the expansion device and exchanging heat between the refrigerant and a liquid. The liquid may comprise a coolant, and a pump may be provided for pumping the coolant through the heat exchanger to a point of use such as a cooling garment to cool personnel on board the vehicle. Alternatively, the liquid may be a drinkable liquid which is pumped through the heat exchanger to a suitable dispensing system to provide an on-board supply of cool drinking liquid.

A water-cooled condenser that exchanges heat between refrigerant of an air conditioner for a vehicle and coolant, and then send the refrigerant out to a air-cooled condenser through a refrigerant outlet port. The refrigerant outlet port is connected with the air-cooled condenser at a position that doesn't overlap a bumper reinforcement arranged in front of the air-cooled condenser at a front section of the vehicle when viewed along an airflow direction toward the air-cooled condenser. In the water-cooled condenser, the refrigerant that flows into the air-cooled condenser through the refrigerant outlet port flows much at a position that doesn't overlap the bumper reinforcement, so that superior heat radiation performance can be brought by a sufficient cooling airflow volume. Therefore, total heat radiation performance achieved by the air-cooled condenser and the water-cooled condenser can be improved.

The invention provides a vacuum spray freeze-drying device and method. The vacuum spray freeze-drying device is characterized in that the device comprises a closed container used for containing materials in the vacuum spray freeze-drying process, atomizing nozzles, a vacuum system and a temperature regulating jacket; the atomizing nozzles are used for atomizing and dispersing liquid to be freeze-dried into liquid drops and spraying the liquid drops into the container; the vacuum system is used for forming a vacuum environment in the container in the vacuum spray-freezing pelletizing stage to enable part of components in the liquid drops to be vaporized so as to absorb heat, and then the liquid drops are cooled and frozen to form particles, and the vacuum system is also used for carrying out continuous vacuumizing in the drying stage so as to maintain the vacuum environment; the temperature regulating jacket is used for carrying out refrigeration in the vacuum spray-freezing pelletizing stage to prevent part of components in the particles from being molten, and the temperature regulating jacket is also used for providing sublimation heat for part of the components in the particles in the drying stage. In the fast freezing process of the materials, and no refrigerants are adopted to contact with the materials, so that the risk of material pollution is completely eliminated, and sterility of the freeze-drying process is guaranteed.

The invention discloses an air conditioner and controlling method thereof capable of cooling operation in the low temperature environment when the outdoor temperature is low. The air conditioner comprises a variable capacity compressor which can vary the capacity; an indoor heat exchanger used for evaporator at the time of the cooling operation; an outdoor temperature sensor for detecting the outdoor temperature; a controlling section which confines the lower limit capacity of the compressor when the detected outdoor temperature is within the predetermined region during cooling operation, andwhich variably controls the compressor capacity to be larger than the predetermined lower limit capacity based on load. Therefore, the invention can permit the substantially cooling operation in the environment that the outdoor temperature is low, and is benefit to avoid the indoor heat exchanger being frozen, so that the reliability of the equipment cooling circulation can be ensured. Further, the invention can avoid the phenomena of the compressor damage caused by liquid cooling agent flowing in by controlling the speed of indoor fan during cooling operation.

The present invention provides a linear compressor, including: a cylinder having a compression space of refrigerant therein; a piston linearly reciprocated inside the cylinder in an axis direction to compress the refrigerant; and a frame having a mounting hole so that one end of the cylinder can be mounted thereon, and also having a deformation prevention portion in some section around the mounting hole brought into contact with the one end of the cylinder. Even though the size of the cylinder is increased and the size of the frame is limited, the frame is provided with enough strength to support the cylinder, thereby reducing fastening deformations and improving operation reliability.

The invention relates to a cascade heat pump drying system and a control method thereof. The cascade heat pump drying system is composed of a high temperature stage loop and a low temperature stage loop. Refrigerating fluid R134a is used in the high temperature stage loop, and refrigerating fluid R744 is used in the low temperature stage loop. Operation of the high temperature stage loop and the low temperature stage loop can be controlled according to the environment temperature so that the system can work normally within the wide environment temperature range from -20 DEG C to 43 DEG C, and the use requirement can be met.

A hermetic compressor comprises a hermetic container, an electric motor and a compressing mechanism installed inside of the hermetic container, lubricating oil and refrigerant gas enclosed within the hermetic container, a first temperature detector disposed to a predetermined location within the hermetic container, and a second temperature detector disposed to a location adjacent to a surface of the lubricating oil in the hermetic container. The predetermined location where the first temperature detector is disposed is one of a location near an upper end and another location near a lower end within a space inside the hermetic container, and an amount of the lubricating oil in the hermetic container is determined according to temperatures detected by the first temperature detector and the second temperature detector.

A subcooling heat exchanger and subcooling expansion valve in a refrigeration system provide subcooling of a pre-subcooled portion, for refrigerating a thermal load, of condensed refrigerant liquid by a pre-subcooling portion of the condensed refrigerant liquid. The amount of subcooling of the pre-subcooled portion is determined by measuring, with a pressure sensor, refrigerating suction pressure exerted by refrigerating compressors of the system. A controller then controls, based on the refrigerating suction pressure, modulation of mass of pre-subcooling portion, relative pre-subcooled portion, and expansion thereof in the subcooling expansion valve, which controls the amount of refrigerant heat exchanged, and therefore subcooling of pre-subcooled portion, between the pre-subcooling portion and the pre-subcooled portion in the subcooling heat exchanger. The pre-subcooling portion is then subsequently compressed by a subcooling compressor.

The invention discloses a flash evaporator which utilizes a cooling oil line of a compressor to heat an internal volume. The flash evaporator comprises a shell, a liquid refrigerant inlet, a liquid refrigerant outlet and a refrigerant vapor outlet, wherein the shell defines the internal volume; the liquid refrigerant inlet is communicated with a fluid in the internal volume; the liquid refrigerant outlet is communicated with the fluid in the internal volume; and the refrigerant vapor outlet is communicated with the fluid in the internal volume. The flash evaporator is characterized in that the flash evaporator further comprises a heating device for heating the internal volume, wherein the outlet of the heating device is communicated with the inlet liquid of the cooling oil line of the compressor, and the inlet of the heating device is communicated with the outlet liquid of the cooling oil line of the compressor. The flash evaporator utilizes the cooling oil line of the compressor as the heating device of the internal volume, and accordingly, an additional heat exchanger for the cooling oil line is omitted. The structure of the cooling system is simplified, and the heat is recycled, so that energy is saved. The invention further relates to a cooling system utilizing the flash evaporator.

The invention provides a low-temperature refrigeration control method, a low-temperature refrigeration control device and an air conditioner. The low-temperature refrigeration control method comprises the steps that in a low-temperature refrigeration mode, the outlet temperature of an outdoor condenser of the air conditioner is detected through a temperature sensor; the detected outlet temperature of the outdoor condenser is judged to be smaller than or equal to a preset outlet temperature or not; and according to the judging result, the covering area of a wind baffling device which is arranged outside the outdoor condenser of the air conditioner is adjusted. By adopting the technical scheme disclosed by the invention, the heat exchange between the outdoor condenser and the external environment is weakened; the pressure of an outdoor refrigerant is maintained at a reasonable range, and the problems of frosting, liquid slugging and the like caused by over-low pressure of the outdoor refrigerant are avoided; the operation safety of the air conditioning system at a low-temperature outdoor environment temperature is increased; and the user experience is improved.

The invention discloses an auto-cascade heat pump with a middle throttling element and an adjusting method thereof. The heat pump comprises a single compressor, a condenser, an air-liquid separator, a condensing evaporator, an evaporator and a throttling valve, wherein non-azeotropic refrigerants containing two or more components are adopted as refrigerants. On the circulation basis of an original auto-cascade heat pump, the middle throttling element is added, the refrigerants at a condenser outlet, which are in a less dryness and undercooling state, can be used for eliminating the negative influence of condenser outlet state change caused by working condition changes on the system performance and taking the effect of obviously optimizing the performance by adjusting the mass flow ratio of the high-boiling point refrigerant and the low-boiling point refrigerant enriched in a middle throttling degree reasonable distribution system. The invention has the advantages of good suitability, simple structure, energy-saving operation and great working temperature difference.

A compressor output calculation unit having a variable displacement compressor, a condenser, a pressure reducing mechanism and an evaporator, wherein a compressor torque or power is calculated based on a detected or estimated value of a refrigerant flow rate, a detected or estimated value of a refrigerant discharge pressure, a detected or estimated value of a refrigerant suction pressure, and a compressor rotational speed, and a control unit using the same. The compressor torque or power may be estimated at a high accuracy without using a refrigerant flow sensor.

The invention discloses a control method and device and an air conditioner. The method comprises the steps of conducting detection on the operation condition of electrical equipment through an alarm detector; and when the abnormal condition is detected through the alarm detector, controlling the abnormal condition. According to the control method and device and the air conditioner, a refrigerant concentration detector, a fire detector, a small fan and a fire extinguishing device containing carbon dioxide are arranged on an indoor unit, so that the electrical equipment adopting combustible type refrigerant is protected; fire danger is avoided to the greatest extent; the mass of the refrigerant of the indoor unit is reduced; the requisite condition for combustion explosion after the refrigerant leaks is eliminated; and safety of users is guaranteed to the utmost extent.

The objective of the invention is to provide an air conditioning device capable of improving heating starting performance or defrosting restorability. The air conditioning device is provided with a compressor which is used for compressing a refrigerant, an indoor heat exchange device through which the refrigerant compressed by the compressor flows in heating operation processes, an electric expansion valve through which the refrigerant condensed by the indoor heat exchange device flows, an outdoor heat exchange device through which the refrigerant expanded by the electric expansion valve flows, an external air temperature detection assembly which is used for detecting external air temperature, and a control part which is used for controlling opening degree of the electric expansion valve. The air conditioning is characterized in that the control part is used for fixing the opening degree of the electric expansion valve according to set time and set opening degree when the heating operation is started, and the opening degree is correspondingly changed based on the temperature difference between the temperature detected by the external air temperature detecting assembly and the air saturation temperature at an inhalation side of the compressor when the heating operation is started.

The invention relates to a new method for preparing hexafluorobutadiene. The new method is characterized by comprising the following steps that 1, HFC-134a and Br2 are subjected to a continuous gas phase catalysis reaction under the effect of a catalyst with metal chloride or bromide as an active component to prepare CF3CFBr2; 2, CF3CFBr2 is dripped into a reactor for aprotic polar solvent in which zinc powder is dissolved to prepare trifluoro vinyl zinc bromide; 3, with ferric salt and copper salt serving as catalysts, in the aprotic polar solvent, trifluoro vinyl zinc bromide is subjected to a telomerization reaction to generate a target product hexafluorobutadiene. The refrigerant HFC-134 a and Br2 which are used on a large scale at present and gradually obsoleted are used as starting raw materials, the materials are easy to obtain and low in price, the reaction is carried out under the gas phase condition, the reaction condition is easy to control, and the method is a C4F6 preparing method having a great market application prospect.

An ice rink cooling facility 100 in which a cooling-pipe bank 1 having a plurality of cooling pipes 11 is arranged at the bottom part of the ice rink 10 and CO₂ brine streams through the cooling pipe bank 1 so as to cool the ice rink 10, the ice rink cooling facility 100 including, but not limited to: at least one planar heat conduction member that is arranged on and over the cooling pipes 11; a CO₂ circulation circuit 3 that is connected to the cooling pipes 11 so that the CO₂ brine circulates in the CO₂ circulation circuit 3; an ammonia refrigerating cycle in which an ammonia refrigerant circulates; and, a cascade condenser 211 in which the heat exchange is performed between the CO₂ brine and the ammonia refrigerant so that the CO₂ brine is cooled and re-liquefied by use of the ammonia refrigerant.

The invention provides a control method of an electromagnetic valve for air conditioner liquid injecting cooling. An air conditioner comprises a control unit and the electromagnetic valve used for controlling liquid refrigerants of a compressor of the air conditioner to be bypassed to the low-pressure side of the compressor. The control unit is used for controlling the electromagnetic valve to be opened and closed. The control unit controls the electromagnetic valve to be opened and closed according to the magnitude relation of the exhaust temperature T1 of the compressor and the exhaust temperature preset value and/or the magnitude relation of the exhaust superheat degree of the compressor of the control unit and the preset temperature value. The electromagnetic valve is controlled to be opened and closed by increasing the magnitude relation of the exhaust superheat degree and the preset temperature value. Thus, compressor oil has a good lubrication effect, the service life of the compressor is prolonged, and the reliability of the compressor is improved.

The invention provides a refrigerating ice bag, a refrigerant and a preparation method of the refrigerant, and belongs to the technical field of refrigerating articles. The refrigerating ice bag comprises the refrigerant and a bag body. The refrigerant is sealed in the bag body. The refrigerant can be frozen into solid to be used by cooling the refrigerating ice bag. The refrigerant in the refrigerating ice bag has a high cold storage function and is slow in chilling, the initial cooling efficiency is high, and the temperature can be lowered quickly. The cooling effect lasts for a long time, the problem that the refrigerating ice bag is frequently replaced can be greatly reduced, and use cost of the refrigerating ice bag is lowered.

The invention provides a pipe vibration response function fitting method under different environmental conditions of an air conditioner, belonging to the field of frequency conversion air conditioners. The main points are as follows: the compressor suction and discharge port pressures at different frequency points under any mode of operation corresponding to outdoor ambient temperature of the airconditioner are measured, and the compressor suction and discharge port pressures at other ambient temperatures are obtained by fitting software; calculating the gas resistance torque of the compressor and the effective driving torque of the compressor shaft compressing refrigerant, and calculating the rotational inertia torque of the compressor shaft according to the calculated gas resistance torque of the compressor and the effective driving torque of the compressor shaft compressing refrigerant; the calculated rotational inertia moment of the compressor shaft is transformed by FFT, and themoment amplitude, initial phase and constant of each harmonic component of the rotational inertia moment of the compressor shaft at the operating frequency point are obtained. According to the torqueharmonics obtained from the solution, the vibration response function of compressor pipes under different environmental conditions is obtained by fitting.

The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 11 kW to 16 kW, inclusive, and uses R134a as a refrigerant circulating therein, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.