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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B39/00—Evaporators; Condensers
  • F25B39/02—Evaporators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B1/00—Compression machines, plants or systems with non-reversible cycle
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B27/00—Machines, plants or systems, using particular sources of energy
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
  • F25B23/006—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect boiling cooling systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B2300/00—Special arrangements or features for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B2500/00—Problems to be solved
  • F25B2500/21—Reduction of parts

Definitions

• the present application relates to a refrigeration system and, in particular, to a refrigeration system without a compressor powered by a heat source.
• a conventional compression chiller consists of four parts: a compressor, a condenser, an evaporator, and an expansion valve.
• the working process is: the compressor extracts the lower pressure heat exchange working fluid (such as Freon) gas after vaporization in the evaporator, and compresses the working gas into a high pressure gas, which is sent into the condenser, and the high pressure gas is
• the condenser is cooled and condensed into a high-pressure liquid. After being throttled by the expansion valve, it becomes a low-pressure liquid working medium and is sent to the evaporator.
• the normal-temperature low-pressure liquid working medium absorbs heat from the cooling output in the evaporator, thus completing a refrigeration. cycle.
• the solar air conditioner includes an accumulator 2 provided with a light pipe receiver 8 for converting light energy into heat energy on one side, and the tubular exchanger 3 of the inner cavity of the accumulator 2 is accommodated low.
• the working fluid of boiling point.
• the working fluid is heated and vaporized in the exchanger 3 to form a high temperature and high pressure gas, which is output from the exchanger to the outdoor condenser 10, and is cooled and depressurized and then passed through the pressure reducing throttle valve 12.
• the working medium is in a low-temperature liquid state and enters the indoor evaporator 11 to absorb heat, thereby lowering the indoor temperature. Then, the working medium passes through the booster 7, passes through the pressure increasing and decreasing valve 6, and enters the exchanger 3 in the accumulator through the electromagnetic four-way valve to complete the cycle.
• the air conditioner in the above document does not use a compressor in the circulation of the heat exchange working fluid, but still uses the booster 7 to push the working fluid in the evaporator back to the exchanger to realize the working cycle, and the structure is still similar to compression.
• the machine does not fundamentally solve the problem of the power of the working fluid flowing back from the evaporator to the exchanger after heat exchange. Summary of the invention
• the present invention is intended to provide a refrigeration system that uses only a heat source to achieve refrigeration without using a compressor.
• the invention provides a refrigeration system, comprising: a heat source, providing heat energy; a power generator, heating a refrigerant through a heat source disposed in the power generator to increase temperature and pressure and gasification; a condenser, due to power The pressure difference generated by the high temperature in the generator, the liquid refrigerant enters the condenser from the power generator, and the temperature of the liquid refrigerant is lowered in the condenser; the throttle valve, the throttle valve controls the liquid cooling through the condenser The working fluid is ejected from the throttle valve under the pressure difference, and the liquid refrigerant is decompressed and absorbed by the jet of the throttle valve; the evaporator, the low-temperature low-pressure refrigerant injected from the throttle valve is sprayed Into the evaporator, in the evaporator, the refrigerant is heat exchanged
• various forms of heat sources can be used to heat the working medium, so that the working fluid flows from the power source to the evaporator, and gravity is used as a power source for the working fluid to flow back from the evaporator to the power source.
• gravity is used as a power source for the working fluid to flow back from the evaporator to the power source.
• the upper and lower valves are opened at the wrong time, and the pressure difference between the power generator and the evaporator is balanced by the liquid storage tank twice, thereby transferring the liquid working fluid that has completed the heat exchange from the evaporator to the power generator, and Go into the loop again.
• the problem of the inability to reflow the working medium due to the pressure difference between the power generator and the evaporator is reasonably solved.
• FIG. 1 is a view showing a first embodiment of a refrigeration system of the present invention.
• Figure 2 is a diagram of the operational state of the liquid working fluid reflux device with the upper valve open.
• Figure 3 is a diagram of a second embodiment of the refrigeration system of the present invention.
• the refrigeration system of the present invention comprises: a heat source for providing heat energy, a power generator 2 for accommodating the liquid medium 3 and the gaseous medium 4, a condenser 5, a throttle valve 7, an evaporator 8, and a cooling output. 10 and liquid working fluid reflux device 15.
• the power generator 2 heats the refrigerant including the liquid working medium 3 and the gaseous working medium 4 through the heat source 1 disposed in the power generator 2 to increase the temperature and pressure. High and gasification occurs. Due to the pressure difference caused by the high temperature in the power generator 2, the liquid refrigerant 3 flows from the power generator 2 into the condenser 5, and in the condenser 5, the liquid refrigerant temperature is lowered.
• the throttle valve 7 is controlled such that the liquid refrigerant passing through the condenser is ejected from the throttle valve 7 by the pressure difference, and the liquid refrigerant is decompressed by the jet action of the throttle valve 7 to absorb heat.
• the low-temperature low-pressure refrigerant injected from the throttle valve 7 is injected into the evaporator 8, in which the refrigerant is exchanged with the refrigeration output 10 and accumulated in the form of a liquid refrigerant. 8 bottom.
• the liquid working medium accumulated at the bottom of the evaporator 8 is freely flowed back into the power generator by the liquid working fluid reflux device 15 under the action of gravity.
• the liquid working fluid reflux device 15 includes an upper valve 12, a liquid storage tank 13 and a lower valve 14.
• the upper end of the liquid storage tank 13 is connected to the evaporator 8 via an upper valve 12, and the lower end of the liquid storage tank 13 passes through the lower valve 14 and the power generator. 2 is connected, and the upper valve 12 and the lower valve 14 are respectively opened, and are not opened at the same time.
• the evaporator 8, the liquid working fluid reflux device 15 and the power generator 2 are arranged from high to low.
• the specific working process of the whole system is as follows: The liquid working medium 3 is heated in the power generator 2, the temperature and pressure are raised, and gasification occurs.
• the evaporator end is in a low temperature and low pressure state
• the power generator end is in a high temperature and high pressure state.
• the evaporator end temperature is 20 ° C
• the power generator end temperature is 60 ° C.
• the pressure at 20 °C is 0.4689 MPa
• the pressure at 60 °C is 1.427 MPa, that is, the pressure difference between the evaporator end and the power generator end is 0.958 MPa.
• the unvaporized liquid working medium located under the power generator flows out of the power generator 2 through the outlet of the power generator located below the gas-liquid interface to achieve condensation.
• Device 5 At the condenser 5, the liquid working temperature drops, but is still a high pressure liquid working medium.
• the high pressure liquid working fluid is injected from the throttle valve into the evaporator 8. At this time, the liquid working medium pressure is lowered, and the heat of the cooling output in the evaporator is vaporized and absorbed, thereby achieving heat exchange.
• a liquid working fluid reflux device 15 is disposed between the power generator and the evaporator.
• the liquid working fluid reflux device 15 includes an upper valve 12 in the form of, for example, an electronic switch, a liquid storage tank 13 and a lower valve 14 in the form of, for example, an electronic switch.
• the upper end of the liquid storage tank 13 is connected to the height evaporator 8 via the upper valve 12, and the lower end is connected to the power generator 2 via the lower valve 14.
• the evaporator 8, the liquid working fluid returning device 15 and the power generator 2 are arranged from high to low.
• the gaseous working medium in the evaporator passes through heat exchange with the refrigeration output 10, and becomes a low-temperature low-pressure liquid working medium.
• Liquid working fluid accumulates at the bottom of the evaporator.
• the upper valve 12 connected to the bottom of the evaporator 8 is periodically opened. After being opened for a predetermined period of time, the liquid storage tank 13 is pressure-balanced with the evaporator 8, and the liquid working medium at the bottom of the liquid storage tank 13 is freely flown into the liquid storage tank 13 by gravity, as shown in Fig. 2. Thereafter, the upper valve 12 is closed.
• the lower valve 14 is opened, and after a predetermined time, the liquid storage tank 13 is pressure-balanced with the power generator 2, and the liquid working medium in the liquid storage tank 13 is also freely flown back to the power generator 2 by gravity. Thereafter, the lower valve 14 is closed.
• the pressure isolation of the power generator and the evaporator is achieved by the alternate opening of the upper and lower valves.
• the liquid working fluid reflux device 15 Through the liquid working fluid reflux device 15, the pressure difference between the power generator and the evaporator can be maintained to continue the system operation, and the liquid working fluid is recirculated.
• the refrigeration cycle is completed by the above process.
• the return of the working fluid from the evaporator to the power source is achieved only by gravity, and the upper and lower valves maintain a predetermined pressure difference between the power generator and the evaporator, so that the entire system continues to operate.
• the periodic opening and closing time interval of the valve can be controlled by a controller.
• water cooling or air cooling may also be employed.
• the double condensation series is adopted, first passing through the hot water storage tank 20, and then passing through the air cooling condensation. , secondary cooling.
• the refrigerant can be ammonia, F12, F22, F502, liquid nitrogen, 134A, and the like.
• the present invention utilizes various common forms of heat sources as a source of power for the working fluid to flow from the power source to the evaporator, and utilizes gravity as a source of power for the working fluid to flow back from the evaporator to the power source.
• the complicated process of electric energy-mechanical energy conversion involving the compressor in the conventional refrigeration system is fundamentally eliminated, the structure is simple, the cost is reduced, and it is suitable for various occasions.
• the refrigeration system of the present invention saves energy and can utilize various common heat sources such as a water heater, various boiler waste heats, etc., without requiring a large amount of electric energy as required in compression refrigeration.
• the refrigeration system of the present invention has no noise generated by the compressor, has low cost, and has a wide range of applications. Implementers can use different sources of heat depending on the situation, such as solar heat sources, electric heater heat sources, or waste heat sources such as boilers, etc., can be used as heat sources.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Engine Equipment That Uses Special Cycles (AREA)

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Applications Claiming Priority (2)

Publications (1)

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Citations (5)

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• 2011
  • 2011-11-04 JP JP2014537449A patent/JP2014531013A/ja active Pending
  • 2011-11-04 US US14/123,597 patent/US20140223957A1/en not_active Abandoned
  • 2011-11-04 EP EP11874754.2A patent/EP2778568A1/en not_active Withdrawn
  • 2011-11-04 WO PCT/CN2011/081806 patent/WO2013060044A1/zh not_active Ceased

Patent Citations (5)

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