679results about "Superheaters" patented technology

A subsection compression-subsection heat supply-subsection gas expanding compression type machine set belongs to the technical field of heat pumps/refrigeration, and consists of a compressor, an expander, a heat exchanger, a second heat exchanger and a low-temperature heat exchanger. Gas working substances absorbing heat from the low-temperature heat exchanger and raising temperature enter the compressor; after the gas working substances are compressed in a low pressure compression section, a part of the gas working substances are provided for the heat exchanger to complete the heating of a heated medium at an initial stage; the part of the gas working substances enter the expander and is expanded at a low pressure expansion section; the other part of the gas working substances are provided for the second heat exchanger to complete the heating of a second stage of the heated medium after continuously passing through the whole compression process and raising temperature, and enter the expander from an inlet of the high pressure expansion section of the expander for expanding; the gas working substances completing the expanding work flow through the low-temperature heat exchanger to absorb the heat and raise the temperature and enter the compressor; and a heat regenerator is added to form a regenerative machine set. The gas expanding compression type machine set reduces temperature difference of heat transmission and improves the performance index; when taken as a heat pump, the gas expanding compression type machine set is particularly suitable for occasions with high heating temperature and wide range; and when used for refrigeration, the gas expanding compression type machine set can reduce power consumption.

A system for providing liquid refrigerant subcooling by means of evaporative cooling utilizing the condensate water of said air conditioner, refrigeration/heat pump system and/or other water supply to wet the surface of the subcool heat exchanger and pass the dry exhaust air across the wetted surface of the subcool heat exchanger. A system for providing hot gas discharge refrigerant precooling into the primary condenser of an air conditioner, refrigeration or heat pump system by evaporative cooling utilizing the condensate water of said system and/or other water supply to wet the surface of the precool heat exchanger and then passing the cold, dry exhaust air across the wetted surface of the precool heat exchanger. A combination subcooler/precooler system where the cold dry building exhaust air is used to evaporatively subcool the liquid refrigerant in the water wetted (or dry) subcooler and then used to conductively cool the hot gas refrigerant.

The invention discloses an active-regeneration type thermoelastic refrigeration system. The active-regeneration type thermoelastic refrigeration system comprises a high-temperature side heat exchanger, a low-temperature side heat exchanger, at least two regenerators made of thermoelastic refrigeration materials, and a heat exchange fluid network used for discharging heat from the low-temperature side to the high-temperature side.

A refrigeration cycle device 100 where a combustible refrigerant circulates includes a bypass pipe 5 that is connected so that part of the refrigerant that flows through a circulation pipe extending from a condenser 2 to a flow control valve 3 bypasses the flow control valve 3 and an evaporator 4; a bypass flow control valve 6 that controls the amount of the refrigerant flowing through the bypass pipe 5; a heat exchanger 7 that allows heat exchange between the refrigerant that flows through the bypass pipe 5 after flowing out of the bypass flow control valve 6 and the refrigerant that flows through the circulation pipe after flowing out of the condenser 2; and a subcooling degree sensor T73 that detects the subcooling degree of the refrigerant at the inlet of the flow control valve 3. At least either the flow control valve 3 or the bypass flow control valve 6 is controlled so that the subcooling degree of the refrigerant at the inlet of the flow control valve 3 is equal to or greater than or a predetermined value.

The present invention discloses a regenerative refrigeration cycle system air conditioner. It includes compressor, condenser, throttle device, evaporator and recuperative heat exchanger. The described recuperative heat exchanger includes a cylindrical tank body whose top portion and bottom portion are respectively equipped with low-pressure refrigerant outlet and inlet connected with compressor suction pipe and evaporator outlet, a straight tube which is placed in the interior of tank body along vertical direction and whose upper and lower ends are respectively connected with condenser outlet and throttle device and a heat-exchanging coiled tube, said coiled tube and straight tube are integrally formed into one body.

The invention discloses a backheating method and a backheating structure for a heat pump air conditioner, which can improve the performance of the air conditioner. The backheating structure comprises heat exchangers A and B, a compressor, and a throttling element connected between the heat exchangers A and B, wherein the heat exchanger B is connected with the compressor by an air suction pipe of the compressor; and a higher-temperature coolant in the throttling element performs heat exchange with a lower-temperature coolant in the air suction pipe of the compressor. In the backheating method and the backheating structure, the temperature of the coolant in the throttling element can be reduced by performing backheating in a throttling process, thereby retarding the evaporation of the coolant and the change of the dryness of the coolant, making more stable the flow regime of the coolant and reducing inevitable loss; and the dryness of the coolant at an outlet of the throttling element is reduced, namely, the degree of subcooling of the air conditioner is increased, so the cooling capacity of the air conditioner can be improved. The backheating method and the backheating structure for the heat pump air conditioner can improve the cooling or heating performance of the heat pump air conditioner; and the backheating structure is simplified to a certain extent so as to be convenient to manufacture and save the cost.

A chiller unit including a chiller unit main body connected to a refrigeration cycle, a plate type heat exchanger unit that is secured to an upper stage portion of the chiller unit main body and divided into plural plate type heat exchangers, and a pipe group having a water medium pipe and a refrigerant pipe for supplying water medium and refrigerant to each of the plate type heat exchangers while branching the water medium and the refrigerant and collectively disposed at a lower stage portion of the chiller unit main body, wherein at least an exit side portion of the water medium pipe is routed substantially horizontally along the bottom portion of the chiller unit main body and a flow switch is provided in a horizontally-extending pipe portion of the water medium pipe.

A heat exchanger ( 301, 501, 601 ) comprising a first tube ( 107, 507, 607 ) for fluid transmission and a second tube ( 108, 508, 608 ) for fluid transmission within a heat transfer system that uses a working fluid which undergoes compression and evaporation. The first tube is placed in thermal contact with the second tube for a portion ( 109,110 ) of the respective lengths of the first tube and the second tube so as to allow an exchange of heat between the fluid within said tubes. The first tube ( 107, 507, 607 ) is constructed from steel alloy which has alloyed components to reduce the hardness of the steel to facilitate tube bending within a heat transfer system, thereby allowing the first tube to be constructed from the steel within the heat transfer system, in preference to copper.

A cogeneration system including an engine, which drives a generator to generate electricity, a cooling/heating unit, which comprises at least one compressor, a four-way valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger, to establish a heat pump type refrigerant cycle, a cooling water heat supplier to supply heat of cooling water used to cool the engine to a suction side of the compressor of the cooling/heating unit and to pre-heat air passing through the outdoor heat exchanger, and a discharge-side refrigerant over-heater to supply heat of exhaust gas discharged from the engine to a discharge side of the compressor. In accordance with the cogeneration system, it is possible to maximize absorption of the waste heat of the engine while preventing compressor malfunction, and thus, to increase the refrigerant condensing temperature of the indoor heat exchanger and the refrigerant pre-heating temperature of the outdoor heat exchanger. Thus, an enhancement in heating performance is achieved.

A refrigerating-heating air conditioning system with a heat regenerator comprises an outdoor heat exchanger and an indoor heat exchanger. The heat regenerator is connected between the outdoor heat exchanger and the indoor heat exchanger. During heating, flowing direction of refrigerants is changed through a four-way reversing valve, the indoor heat exchanger is used as a condenser, and the outdoor unit is used as an evaporator. Refrigerant gas is sucked into a compressor and then pressurized to be changed into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is condensed and emits heat in the indoor heat exchanger to be changed into intermediate-temperate high-pressure liquid, indoor air passes the surface of the indoor heat exchanger to be heated so as to increase the indoor temperature, the intermediate-temperate high-pressure liquid is subjected to throttling and depressurization of an expansion valve to be changed into low-temperate low-pressure liquid, the low-temperate low-pressure liquid is changed into low-temperate low-pressure gas in the outdoor heat exchanger, outdoor air passes the surface of the outdoor heat exchanger to be cooled, the low-temperate low-pressure gas is sucked into the compressor, and circulation in the way is carried out. Efficiency of the compressor can be improved, liquid impact is prevented, and optimal refrigerant charge of a system is decreased.

The invention discloses an air conditioner as well as a control method and device and belongs to the technical field of air conditioner defrosting. The air conditioner comprises a heat regenerating device; the heat regenerating device comprises a first heat exchange part and a second heat exchange part which can be used for heat exchange; the first heat exchange part is connected to a first refrigerant pipeline between an indoor heat exchanger and an outdoor heat exchanger; and the second heat exchange part is connected to an air return pipeline of a compressor. According to the air conditioner disclosed by the invention, the heat regenerating device is additionally arranged in an air conditioner pipeline, and the defrosting opening of a throttling device can be regulated according to the air return temperature of the compressor under the condition that a liquid refrigerant flows back to the compressor because the liquid inlet temperature of the outdoor heat exchanger is lower than an outdoor dew point temperature, so that the refrigerant flowing into the outdoor heat exchanger through the throttling device is adapted with the current defrosting condition; and the liquid refrigerant flowing back to the compressor is heated and vaporized by virtue of the heat regenerating device, so that the quantity of the refrigerant condensed into a liquid when flowing through the outdoor heat exchanger is reduced, and the safe and effective operation of the whole of the compressor and the air conditioner is guaranteed.

The invention relates to a scroll compressor, which is provided with a multi-speed motor. A controller selectively controls the speed of the motor; and simultaneously a plurality of realizable alternative proposals selectively adjust system capacity so as to meet the requirement of external load in the most efficient and reliable mode. The embodiment comprises an economizer circuit and emptier function and an alternative input control valve. Various parts of the multi-speed motor of the compressor are used, so the capacity provided by the compressor is more suitable for the required capacity.

A heating and cooling system for preventing the deterioration of heating efficiency generated due to a subsidiary heat exchanger used to increase cooling efficiency. The heating and cooling system includes a compressor for compressing a refrigerant, an indoor heat exchanger for heat-exchanging the refrigerant with indoor air, an outdoor heat exchanger for heat-exchanging the refrigerant with an outdoor air, a four-way valve disposed at an outlet of the compressor for selectively discharging the refrigerant to one of the indoor and outdoor heat exchangers according to heating and cooling modes, an expansion valve for decompressing and expanding the refrigerant, an inlet refrigerant pipe for guiding the refrigerant drawn into the compressor, a subsidiary heat exchanger disposed in the inlet refrigerant pipe for heat-exchanging the refrigerant passing through the inlet refrigerant pipe and the refrigerant passing through a connection refrigerant pipe in the cooling mode so as to control the temperature of the refrigerant drawn into the compressor, and a bypass refrigerant pipe for allowing the refrigerant drawn into the compressor to bypass the subsidiary heat exchanger and then to be directed into the compressor.

A cooling device is constructed by a water impermeable member defining a water passage, the water impermeable member being provided with a vapor permeable member which is permeable to water vapor and impermeable to water, and has the form of a mesh and made of a material having water repellency. The cooling device has a long-life operation while preventing wear-out of the vapor permeable member. Further, optimally setting the size of an opening of the mesh member enables to securely dissipate water vapor outside of the cooling device through the vapor permeable member while efficiently suppressing water leak.

The invention discloses a heat regenerator of a heat-regenerating type low-temperature refrigerator, which comprises a sleeve of a heat regenerator and a filler of the heat regenerator. The heat regenerator is characterized in that the sleeve of the heat regenerator is firstly filled with the radial filler and secondly filled with the axial filler, which are alternately filled, and finally with the radial filler; the radial filler is formed by tightly paving and overlapping 20-40 pieces of circular metal nets layer by layer, wherein the diameter of each piece of the circular metal net is equal to the inner diameter of the sleeve of the heat regenerator; the axial filler is formed by tightly winding through a square metal net piece along an edge metal wire; and the radial filler and the axial filler are tightly contacted with the inner wall of the sleeve of the heat regenerator. The depth m of the axial filler is larger than the depth n of the radial filler, and the voidage of the axial filler is less than that of the radial filler. The heat regenerator can realize high heat regenerating efficiency, low flow resistance, small axial heat-guiding loss and smaller empty cubage, and greatly improves the efficiency of the heat-regenerating type low-temperature refrigerator.

The invention relates to a regeneration heat exchanger with radial strengthened conduction, comprising the shell of heat returning machine, and metal plate with hole and metal silk screen/shot set in said shell of heat returning machine in certain distance, which is provided with different conductivity. The outer diameter of metal plate with hole is consistent with the inner diameter of outer shell of heat returning machine. The hydraulic diameter of small hole on said metal plate with hole is 0.5mm-5mm. the sum of said small holes is 1/4-2/3 of the section area of metal plate with hole. It is provide with following merits that simple structure, filling in convenience, strengthening the radius heat exchanging ability of regeneration heat exchanger under the precondition that the loss of heat leak at the axial direction is not increased, maintaining the temperature of heat returning machine consistent or small difference at the transverse section of the same axial position, and improving the efficiency of heat returning machine so as to improve the refrigerated performance.

The invention discloses a deep hypothermic heat regenerator adopting helium as a heat regeneration medium. The heat regenerator comprises a tube shell and heat regeneration padding arranged in the tube shell. The heat regeneration padding is of a sealed heat exchange structure filled with the helium. The invention further discloses a pulse tube refrigerator adopting the deep hypothermic heat regenerator. According to the pulse tube refrigerator, the characteristic that the helium is high in volumetric specific heat capacity at low temperature is utilized, and the helium is closed in a certain space and used as the heat regeneration medium to exchange heat with helium used as a refrigerating working medium; the helium with the suitable pressure can be selected and charged into the enclosed space according to the work pressure of the pulse tube refrigerator so that the volumetric specific heat capacity of the helium serving as the heat regeneration medium in the deep hypothermic area can be higher than that of the helium serving as the refrigerating working medium, efficient heat regeneration can be achieved, and finally the performance of the pulse tube refrigerator in the liquid helium temperature area can be improved; meanwhile, compared with a magnetic heat regeneration material, the deep hypothermic heat regenerator adopting the helium as the heat regeneration medium has the advantages of being low in price, easy to obtain, free from influence of a magnetic field and the like.

The invention discloses an energy self-supplying type carbon dioxide cold and hot electricity co-generation system used for a low-grade heat source. The energy self-supplying type carbon dioxide coldand hot electricity co-generation system comprises a transcritical carbon dioxide reheat Rankine dynamic cycle system and a transcritical carbon dioxide injection refrigeration cycle system; the energy self-supplying type carbon dioxide cold and hot electricity co-generation system integrates reheat Rankine dynamic cycle and injection refrigeration cycle, adopts carbon dioxide as a single workingmedium, converts low-grade heat energy to useful work through a extraction turbine of the transcritical carbon dioxide reheat Rankine dynamic cycle system and supplies the heat energy to users by using a water heater. The transcritical carbon dioxide injection refrigeration cycle system utilizes high-pressure exhaust waste heat of the extraction turbine to drive an injector to output cold energy to the users. Through reasonable arrangement of the system, the system can output more electric energy. By adoption of a working medium pump and a low-pressure-ratio gas compressor, the energy self-supplying type carbon dioxide cold and hot electricity co-generation system reduces compression power efficiently during the system operation and improves net electric generation and conversion efficiency of the low-grade heat energy of the system.

The invention discloses an air conditioning regenerative device which is used between a high pressure liquid storage tank and a liquid pipe stop valve. The device comprises a regenerator and a supercooling valve for adjusting liquid flow in the regenerator. The invention also discloses an air conditioning regenerative control method which comprises following steps: 1) a detection of an outlet temperature of the regenerator; 2) a detection of a pressure of a refrigeration valve; 3) a determination of a saturation temperature according to a comparison of the pressure with a thermodynamics saturation temperature indicator; 4) a judgment that whether a temperature of an outlet of a main pipe of the regenerator is in a preserved ranged of the saturation temperature, if so, a process is finished; if not, an opening of the refrigeration valve is adjusted, and the step 1 is executed. The invention provides the air conditioning regenerative device and the air conditioning regenerative control method for controlling a stability of the system and improving a heat exchanging effect of air conditioning.

The invention discloses a regeneration-type variable-porosity heat regenerator for a low temperature refrigerator. The heat regenerator comprises a low temperature section and a high temperature section. A plurality of layers of regeneration fillers with different porosities are filled in the heat regenerator, and the porosity range of the regeneration fillers filled in the heat regenerator is 59%-92%. According to different proportions of various losses in the heat regenerator at different temperatures, regeneration fillers with different porosities are adopted in different temperature sections of the heat regenerator. Compared with the traditional heat regenerator filled with fillers with fixed porosity, the heat regenerator effectively reduces inside loss, improves heat regeneration efficiency and improves refrigerator efficiency.

A cooling system with refrigerant for air conditioning and engine parts, comprising: a compressor, a high pressure circuit filled with the refrigerant; and a low pressure circuit filled with the refrigerant too. The high pressure circuit further comprises a condenser, the low pressure circuit further comprises an evaporator and a heat exchanger, the heat exchanger at an interior thereof is provided with a refrigerant passage and a fluid passage, which enters the engine, with the two passages next to each other and contacting with each other and at an exterior thereof includes a refrigerant inlet, a refrigerant outlet, a fluid entrance to the engine and a fluid exit from the engine. Once the compressor is in a state of running, the refrigerant in the low pressure circuit passes through the evaporator and enters the refrigerant passage in the engine via a connecting pipe in the low pressure circuit and the refrigerant inlet and then flows out from the heat exchanger via the refrigerant outlet; a fluid for being cooled flows into the fluid passage via the fluid entrance and flows out from the fluid exit before reaching an engine body; and temperature of the fluid during entering fluid passage is higher than the refrigerant in the refrigerant passage and heat in the fluid transmits the refrigerant between a wall of the fluid passage and a wall of the refrigerant passage.

The invention belongs to the refrigeration technical field and particularly relates to an energy-saving refrigeration dehumidifying all-in-one machine. The machine is composed of a compressor, an outdoor condenser, an indoor condenser, a heat regenerator, an evaporator and electronic expansion valves, wherein, the outdoor condenser is connected with the indoor condenser in parallel, and each condenser is corresponding to one electronic expansion valve. When heating up or constant temperature dehumidifying is needed, the indoor condenser and the heat regenerator work. The design of the invention has the functions of refrigeration dehumidifying, heating up or constant temperature dehumidifying, and low-temperature dehumidifying. As the indoor condenser and the heat regenerator are used, the energy consumption is reduced and the dehumidifying capacity is improved. By optimal control, the machine of the invention can adjust the ratio of refrigerants under different working conditions, thus realizing optimal utilization and recovery of energy. The machine of the invention can be used in the fields of a refrigeratory, an artificial climate chamber and the like with the dehumidifying requirement.