EP3293467A1 - Leichtlastentfeuchtungs- und -kühlungsverfahren und -vorrichtung - Google Patents

Leichtlastentfeuchtungs- und -kühlungsverfahren und -vorrichtung Download PDF

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Publication number
EP3293467A1
EP3293467A1 EP15893991.8A EP15893991A EP3293467A1 EP 3293467 A1 EP3293467 A1 EP 3293467A1 EP 15893991 A EP15893991 A EP 15893991A EP 3293467 A1 EP3293467 A1 EP 3293467A1
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EP
European Patent Office
Prior art keywords
evaporator
refrigerant
liquid
gas
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15893991.8A
Other languages
English (en)
French (fr)
Other versions
EP3293467A4 (de
Inventor
Yi Han
Yaopeng ZHAO
Yugang CHU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of EP3293467A1 publication Critical patent/EP3293467A1/de
Publication of EP3293467A4 publication Critical patent/EP3293467A4/de
Withdrawn legal-status Critical Current

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    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only

Definitions

  • the present invention relates to the field of electronic communications technologies, and in particular, to an under-loading dehumidification and refrigeration method and apparatus.
  • a precision air conditioner refers to an equipment room specific precision air conditioner that can fully meet an equipment room environment condition requirement, and is a new type gradually developed in recent 30 years.
  • a computer equipment room is placed with computer devices, program-controlled exchange products and the like, and includes a large quantity of dense electronic elements. To improve use stability and reliability of these devices, an ambient temperature and ambient humidity need to be strictly controlled within a particular range.
  • An equipment room precision air conditioner is a specific air conditioner designed for a modern electronic equipment room, and its working precision and reliability are much higher than those of an ordinary air conditioner.
  • a precision air conditioner humidity is mainly adjusted in two parts: the first is that when air passes through a surface of an evaporator, because a temperature is lower than the dew point of water vapor, the water vapor in the air is liquefied, thereby reducing humidity in the air; and the second is that after humidity in a refrigeration process is lower than a set value, a humidifier is started to perform humidification, thereby ensuring that the humidity is within a set range. Therefore, an ambient temperature is certainly reduced in a dehumidification process, and the precision air conditioner has a large refrigerating capacity; as a result, currently, a precision air conditioner system cannot implement simple and low-cost constant temperature dehumidification.
  • Embodiments of the present invention provide an under-loading dehumidification and refrigeration method and apparatus, which can further implement simple and low-cost constant temperature dehumidification on a basis of having an existing refrigeration and dehumidification function.
  • an under-loading dehumidification and refrigeration apparatus including: a compressor (1), a condenser (2), an evaporator (3), and an electronic expansion valve (8), where an input end of the compressor (1) is connected to an output end of the evaporator (3), an output end of the compressor (1) is connected to an input end of the condenser (2), an output end of the condenser (2) is connected to an input end of the evaporator (3), the electronic expansion valve A (8) is connected in series between the condenser (2) and the evaporator (3), and all the ends are connected by using refrigerant pipes (4), where the compressor (1) is configured to compress a gas refrigerant that enters the compressor (1), to raise pressure and a temperature of the gas refrigerant, and output, to the condenser (2), the gas refrigerant whose temperature and pressure are raised; the condenser (2) is configured to cool the gas refrigerant whose temperature and pressure are raised, to condense the gas ref
  • the aspect in which the evaporator (3) is divided into the first evaporator section (5) and the second evaporator section (7), and the throttling apparatus (6) is connected in series between the first evaporator section (5) and the second evaporator section (7) is specifically used to disconnect a refrigerant pipe in the interior (11) of the evaporator (3) from a preset position between an air inlet (9) of the evaporator and an air outlet (10) of the evaporator, to form two parts of refrigerant pipes, where the refrigerant pipe in the interior (11) of the evaporator is connected between the air inlet (9) of the evaporator and the air outlet (10) of the evaporator, a refrigerant pipe (21) that is in the interior (11) of the evaporator (3) and that is connected to the air inlet (9) of the evaporator is the first evaporator section (5), a refrigerant pipe (31) that is in the
  • the aspect in which the refrigerant pipe in the interior (11) of the evaporator (3) is disconnected from the preset position between the air inlet (9) of the evaporator and the air outlet (10) of the evaporator, to form the two parts of refrigerant pipes is specifically used to disconnect the pipe in the interior of the evaporator from any position between a position whose distance from the air inlet (9) of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet (9) of the evaporator and a position whose distance from the air inlet (9) of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet (9) of the evaporator, to form two parts of pipes.
  • the aspect specifically used to disconnect the pipe in the interior of the evaporator from any position between the position whose distance from the air inlet (9) of the evaporator is greater than or equal to 1/3 of the distance between the pipe and the air inlet (9) of the evaporator and the position whose distance from the air inlet (9) of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet (9) of the evaporator, to form the two parts of pipes is specifically used to disconnect the refrigerant pipe in the interior of the evaporator (3) from a position whose distance from the air inlet (9) of the evaporator is 1/2 of the distance between the refrigerant pipe and the air inlet (9) of the evaporator, to form two parts of pipes.
  • the apparatus further includes: a dispenser (81), where one end of the dispenser (81) is connected to the throttling apparatus (6), and the other end is connected to the second evaporator section, and the dispenser (81) is configured to: when two or more than two groups of air inlets and air outlets exist in the refrigerant pipe in the interior of the evaporator (3), transmit a refrigerant to a second evaporator section between an air inlet and an air outlet of each group.
  • the throttling apparatus (6) is connected in series between the first evaporator section (5) and the second evaporator section (7), and configured to reduce the temperature and the pressure of the liquid refrigerant output by the first evaporator section, and then output the liquid refrigerant to the second evaporator section, which specifically includes:
  • the throttling apparatus further includes a solenoid valve; and the solenoid valve is connected in parallel to the electronic expansion valve, and during constant temperature dehumidification, the solenoid valve is closed, and the electronic expansion valve is configured to perform throttling.
  • the throttling apparatus includes a solenoid valve, connected in parallel to a capillary tube; and during constant temperature dehumidification, the solenoid valve between evaporators is closed, and the capillary tube connected in parallel performs throttling.
  • an under-loading dehumidification and refrigeration method including:
  • the dividing refrigerant pipes in the interior of the evaporator into two parts, to divide the evaporator into a first evaporator section and a second evaporator section specifically includes: disconnecting the refrigerant pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of refrigerant pipes, where the refrigerant pipe in the interior of the evaporator is connected between the air inlet of the evaporator and the air outlet of the evaporator, a refrigerant pipe that is connected to the air inlet of the evaporator is the first evaporator section, a refrigerant pipe that is connected to the air outlet of the evaporator is the second evaporator section, one end of the throttling apparatus is connected to the first evaporator section, and the other end is connected to the second evaporator section.
  • the disconnecting the refrigerant pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of refrigerant pipes specifically includes:
  • the disconnecting the refrigerant pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of refrigerant pipes specifically includes:
  • the method further includes: when two or more than two groups of air inlets and air outlets exist in the refrigerant pipe in the interior of the evaporator, transmitting, by a dispenser, a refrigerant to a second evaporator section between an air inlet and an air outlet of each group, where one end of the dispenser is connected to the throttling apparatus, and the other end is connected to the second evaporator section.
  • the disconnecting the refrigerant pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of refrigerant pipes specifically includes:
  • the disconnecting the refrigerant pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of refrigerant pipes specifically includes:
  • the method further includes: when two or more than two groups of air inlets and air outlets exist in the refrigerant pipe in the interior of the evaporator, transmitting, by a dispenser, a refrigerant to a second evaporator section between an air inlet and an air outlet of each group, where one end of the dispenser is connected to the throttling apparatus, and the other end is connected to the second evaporator section.
  • a data center including a communications device, and further including: the under-loading dehumidification apparatus according to claims 1 to 8, configured to perform refrigeration and dehumidification or constant temperature dehumidification on the communications device.
  • FIG. 1 is an internal implementation principle diagram of an under-loading dehumidification and refrigeration apparatus according to an embodiment of the present invention.
  • a precision air conditioner is widely applicable to a high precision environment such as a computer equipment room, a program-controlled exchange equipment room, a mobile satellite communications station, or a data container.
  • a high precision environment such as a computer equipment room, a program-controlled exchange equipment room, a mobile satellite communications station, or a data container.
  • Such an environment has very high requirements on indicators such as a temperature, humidity, and airflow distribution of air, which need to be ensured by an equipment room specific precision air conditioner device that is running securely and reliably 24 hours a day, 365 days a year.
  • a constant temperature dehumidification apparatus of the present invention is formed by connecting a compressor, a condenser located in a downstream of an outdoor compressor, an evaporator located in an upstream of an indoor compressor, an electronic expansion valve, and a throttling mechanism between evaporators.
  • the present invention is widely applicable to a high precision environment such as a computer equipment room, a program-controlled exchange equipment room, a mobile satellite communications station, or a data container, and is certainly also applicable to the field of household air conditioners.
  • An under-loading dehumidification and refrigeration apparatus includes: a compressor (1), a condenser (2), an evaporator (3), and an electronic expansion valve (8), where an input end of the compressor (1) is connected to an output end of the evaporator (3), an output end of the compressor (1) is connected to an input end of the condenser (2), an output end of the condenser (2) is connected to an input end of the evaporator (3), the electronic expansion valve A (8) is connected in series between the condenser (2) and the evaporator (3), and all the ends are connected by using refrigerant pipes (4), where the compressor (1) is configured to compress a gas refrigerant that enters the compressor (1), to raise pressure and a temperature of the gas refrigerant, and output, to the condenser (2), the gas refrigerant whose temperature and pressure are raised; the condenser (2) is configured to cool the gas refrigerant whose temperature and pressure are raised, to condense the gas refrigerant into a
  • Beneficial effects are as follows: When constant temperature dehumidification needs to be performed, after a refrigerant flows from a condenser into an evaporator 1, a temperature of the refrigerant is higher than an ambient temperature, so that heat release is performed to reduce the temperature; in this case, the refrigerant is still a high-pressure liquid; then after flowing through a throttling mechanism between evaporators, the liquid refrigerant becomes a low-pressure low-temperature refrigerant liquid, and flows into an evaporator 2, and a temperature of the liquid refrigerant is lower than the ambient temperature, so that heat absorption is performed to raise the temperature, and the liquid refrigerant becomes a gas and then flows back to a compressor for a recirculation. Therefore, when the refrigerant passes through the evaporator 1 and the evaporator 2, the temperature is first reduced and then raised.
  • the air For indoor air, the air first passes through the evaporator 2, and a temperature of the air is reduced, and then the air passes through the evaporator 1, and the temperature is raised.
  • the overall temperature of the indoor air passing through an air conditioner basically remains unchanged.
  • the evaporator 2 may continue to perform dehumidification, to reduce indoor humidity continuously, thereby implementing a constant temperature dehumidification function.
  • the electronic expansion valve A When refrigeration needs to be performed, the electronic expansion valve A is not completely opened, to perform throttling.
  • FIG. 2 is an internal implementation principle diagram of an existing evaporator according to an embodiment of the present invention.
  • pipes in the interior of the evaporator 11 include an upper part and a lower part.
  • the existing evaporator includes N parts, where N is a value in a positive integer range as required.
  • the evaporator divides the pipes into a pipe 21 and a pipe 31 from a position of the pipes in the interior of the evaporator.
  • the evaporator is divided into a first evaporator section provided with the pipe 21 and a second evaporator section provided with the pipe 31.
  • FIG. 3 is an internal implementation principle diagram of an improved evaporator according to an embodiment of the present invention.
  • refrigerant pipes in the interior of the evaporator 11 include an upper part and a lower part.
  • an evaporator includes N parts, where N is a value in a positive integer range as required.
  • the evaporator divides the pipes into a pipe 21 and a pipe 31 from a position of the refrigerant pipes in the interior of the evaporator.
  • the evaporator is divided into a first evaporator section provided with the pipe 21 and a second evaporator section provided with the pipe 31.
  • a throttling apparatus that includes a capillary tube 61 and an electronic expansion valve 71
  • the capillary tube 61 and the electronic expansion valve 71 in the throttling apparatus may be replaced with various throttling apparatuses in the prior art.
  • FIG. 4 shows an under-loading dehumidification and refrigeration apparatus according to an embodiment of the present invention, where the apparatus includes:
  • the apparatus further includes the electronic expansion valve A.
  • the electronic expansion valve A When constant temperature dehumidification needs to be performed, the electronic expansion valve A is completely open to perform no throttling, and the throttling apparatus between evaporators performs throttling; and during refrigeration, the electronic expansion valve A is not completely opened, to perform throttling.
  • the evaporator is specifically configured to: disconnect the pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of pipes, where the pipe in the interior of the evaporator is connected between the air inlet of the evaporator and the air outlet of the evaporator, a pipe that is connected to the air inlet of the evaporator is the first evaporator section, a pipe that is connected to the air outlet of the evaporator is the second evaporator section, and one end of the throttling apparatus is connected to the first evaporator section, and the other end is connected to the second evaporator section.
  • the preset position is located in the pipe between the air inlet of the evaporator and the air outlet of the evaporator, and a setting of the preset position needs to conform to a function that the first evaporator section and the second evaporator section can respectively achieve in this embodiment.
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from any position between the position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of the distance between the pipe and the air inlet of the evaporator and the position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form the two parts of pipes
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from a position whose distance from the air inlet of the evaporator is 1/2 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the under-loading dehumidification and refrigeration apparatus further includes: a dispenser, where one end of the dispenser is connected to the throttling apparatus, and the other end is connected to the second evaporator section, and the dispenser is configured to: when two or more than two groups of air inlets and air outlets exist in the pipe in the interior of the evaporator, transmit a refrigerant to a second evaporator section between an air inlet and an air outlet of each group.
  • the throttling apparatus is connected in series between the first evaporator section and the second evaporator section, and configured to reduce the temperature and the pressure of the liquid refrigerant output by the first evaporator section, and then output the liquid refrigerant to the second evaporator section, which specifically includes:
  • an electronic expansion valve A When normal refrigeration without dehumidification is performed, an electronic expansion valve A performs throttling, and a throttling apparatus between evaporators is completely opened and achieves no throttling function; a refrigerant exhausted from a compressor is a high-temperature high-pressure gas, releases heat to outdoor air when passing through a condenser, and becomes a high-temperature high-pressure refrigerant liquid, and after passing through the electronic expansion valve A, the refrigerant becomes a low-pressure low-temperature refrigerant liquid, and a temperature of the refrigerant is lower than an indoor temperature, so that heat absorption is performed, thereby reducing a temperature of indoor air passing through the evaporator, and implementing a refrigeration function; and after absorbing heat, the refrigerant becomes a low-pressure gas whose temperature is raised, and flows back to the compressor for a next recirculation.
  • the electronic expansion valve A When constant temperature dehumidification needs to be performed, the electronic expansion valve A is completely opened to perform no throttling, and the throttling apparatus between evaporators performs throttling.
  • a refrigerant flows from the condenser into an evaporator 1, a temperature of the refrigerant is higher than an ambient temperature, so that heat release is performed to reduce the temperature; then after flowing through a throttling mechanism between evaporators, the liquid refrigerant becomes a low-pressure low-temperature refrigerant liquid, and flows into an evaporator 2, and a temperature of the liquid refrigerant is lower than the ambient temperature, so that heat absorption is performed to raise the temperature, and the liquid refrigerant becomes a gas and then flows back to the compressor for a recirculation. Therefore, when the refrigerant passes through the evaporator 1 and the evaporator 2, the temperature is first reduced and then raised.
  • FIG. 6 shows an under-loading dehumidification and refrigeration apparatus according to an embodiment of the present invention.
  • the apparatus includes:
  • the evaporator is specifically configured to: disconnect the pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of pipes, where the pipe in the interior of the evaporator is connected between the air inlet of the evaporator and the air outlet of the evaporator, a pipe that is connected to the air inlet of the evaporator is the first evaporator section, a pipe that is connected to the air outlet of the evaporator is the second evaporator section, and one end of the throttling apparatus is connected to the first evaporator section, and the other end is connected to the second evaporator section.
  • the preset position is located in the pipe between the air inlet of the evaporator and the air outlet of the evaporator, and a setting of the preset position needs to conform to a function that the first evaporator section and the second evaporator section can respectively achieve in this embodiment.
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from any position between the position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of the distance between the pipe and the air inlet of the evaporator and the position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form the two parts of pipes
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from a position whose distance from the air inlet of the evaporator is 1/2 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the under-loading dehumidification and refrigeration apparatus further includes: a dispenser, where one end of the dispenser is connected to the throttling apparatus, and the other end is connected to the second evaporator section, and the dispenser is configured to: when two or more than two groups of air inlets and air outlets exist in the pipe in the interior of the evaporator, transmit a refrigerant to a second evaporator section between an air inlet and an air outlet of each group.
  • the throttling apparatus is connected in series between the first evaporator section and the second evaporator section, and configured to reduce the temperature and the pressure of the liquid refrigerant output by the first evaporator section, and then output the liquid refrigerant to the second evaporator section, which specifically includes:
  • Beneficial effects are as follows: When constant temperature dehumidification needs to be performed, after a refrigerant flows from a condenser into an evaporator 1, a temperature of the refrigerant is higher than an ambient temperature, so that heat release is performed to reduce the temperature; then after flowing through a throttling mechanism between evaporators, the liquid refrigerant becomes a low-pressure low-temperature refrigerant liquid, and flows into an evaporator 2, and a temperature of the liquid refrigerant is lower than the ambient temperature, so that heat absorption is performed to raise the temperature, and the liquid refrigerant becomes a gas and then flows back to a compressor for a recirculation. Therefore, when the refrigerant passes through the evaporator 1 and the evaporator 2, the temperature is first reduced and then raised.
  • the air For indoor air, the air first passes through the evaporator 2, and a temperature of the air is reduced, and then the air passes through the evaporator 1, and the temperature is raised.
  • the overall temperature of the indoor air passing through an air conditioner basically remains unchanged.
  • the evaporator 2 may continue to perform dehumidification, to reduce indoor humidity continuously, thereby implementing a constant temperature dehumidification function.
  • FIG. 7 shows an under-loading dehumidification and refrigeration method provided in an embodiment of the present invention. As shown in FIG. 8 , steps of this embodiment are as follows:
  • a compressor raises pressure and a temperature of a gas refrigerant that enters the compressor, and outputs, to a condenser, the gas refrigerant whose temperature and pressure are raised.
  • the condenser cools the gas refrigerant whose temperature and pressure are raised, to condense the gas refrigerant into a liquid refrigerant, and then output the gas refrigerant to an evaporator.
  • S703 Divide refrigerant pipes in the interior of the evaporator into two parts, to divide the evaporator into a first evaporator section and a second evaporator section.
  • S704 In a case of refrigeration and dehumidification, close an electronic expansion valve A partially to perform throttling on the liquid refrigerant input from the condenser, to reduce pressure and a temperature of the liquid refrigerant and form a gas-liquid two-phase refrigerant, and then output the gas-liquid two-phase refrigerant to the evaporator.
  • the first evaporator section and the second evaporator section perform heat exchange on the gas-liquid two-phase refrigerant output by the electronic expansion valve A and an environment, and a throttling apparatus performs no throttling, to raise a temperature of the gas-liquid two-phase refrigerant to become a gas refrigerant, so as to reduce an ambient temperature to perform dehumidification on the environment, and then output the gas refrigerant to the compressor.
  • S706 In a case of constant temperature dehumidification, fully open the electronic expansion valve A to perform no throttling, where the first evaporator section is configured to perform heat exchange on the liquid refrigerant and an environment, to reduce a temperature of the liquid refrigerant and raise an ambient temperature, and then output, to the throttling apparatus, the liquid refrigerant whose temperature is reduced.
  • S707 The throttling apparatus performs throttling on the liquid refrigerant output by the first evaporator section, to reduce pressure and the temperature of the liquid refrigerant and form a gas-liquid two-phase refrigerant, and then output the gas-liquid two-phase refrigerant to the second evaporator section.
  • the second evaporator section performs heat exchange on the gas-liquid two-phase refrigerant output by the throttling apparatus and the ambient temperature, to raise a temperature of the gas-liquid two-phase refrigerant to become a gas refrigerant, reduce the ambient temperature to perform dehumidification on the environment, and then output the gas refrigerant to the compressor.
  • an electronic expansion valve A When normal refrigeration without dehumidification is performed, an electronic expansion valve A performs throttling, and a throttling apparatus between evaporators is completely opened and achieves no throttling function; a refrigerant exhausted from a compressor is a high-temperature high-pressure gas, releases heat to outdoor air when passing through a condenser, and becomes a high-temperature high-pressure refrigerant liquid, and after passing through the electronic expansion valve A, the refrigerant becomes a low-pressure low-temperature refrigerant liquid, and a temperature of the refrigerant is lower than an indoor temperature, so that heat absorption is performed, thereby reducing a temperature of indoor air passing through the evaporator, and implementing a refrigeration function; and after absorbing heat, the refrigerant becomes a low-pressure gas whose temperature is raised, and flows back to the compressor for a next recirculation.
  • the electronic expansion valve A When constant temperature dehumidification needs to be performed, the electronic expansion valve A is completely opened to perform no throttling, and the throttling apparatus between evaporators performs throttling.
  • a refrigerant flows from the condenser into an evaporator 1, a temperature of the refrigerant is higher than an ambient temperature, so that heat release is performed to reduce the temperature; then after flowing through a throttling mechanism between evaporators, the liquid refrigerant becomes a low-pressure low-temperature refrigerant liquid, and flows into an evaporator 2, and a temperature of the liquid refrigerant is lower than the ambient temperature, so that heat absorption is performed to raise the temperature, and the liquid refrigerant becomes a gas and then flows back to the compressor for a recirculation. Therefore, when the refrigerant passes through the evaporator 1 and the evaporator 2, the temperature is first reduced and then raised.
  • the under-loading dehumidification and refrigeration method further includes: the dividing refrigerant pipes in the interior of the evaporator into two parts, to divide the evaporator into a first evaporator section and a second evaporator section specifically includes: disconnecting the pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of pipes, where the pipe in the interior of the evaporator is connected between the air inlet of the evaporator and the air outlet of the evaporator, a pipe that is connected to the air inlet of the evaporator is the first evaporator section, a pipe that is connected to the air outlet of the evaporator is the second evaporator section, and one end of the throttling apparatus is connected to the first evaporator section, and the other end is connected to the second evaporator section.
  • the under-loading dehumidification and refrigeration method further includes: the disconnecting the pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of pipes specifically includes: disconnecting the pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the under-loading dehumidification and refrigeration method further includes: the evaporator being specifically configured to disconnect the pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes specifically includes:
  • the under-loading dehumidification and refrigeration method further includes:
  • an electronic expansion valve A When normal refrigeration without dehumidification is performed, an electronic expansion valve A performs throttling, and a throttling apparatus between evaporators is completely opened and achieves no throttling function; a refrigerant exhausted from a compressor is a high-temperature high-pressure gas, releases heat to outdoor air when passing through a condenser, and becomes a high-temperature high-pressure refrigerant liquid, and after passing through the electronic expansion valve A, the refrigerant becomes a low-pressure low-temperature refrigerant liquid, and a temperature of the refrigerant is lower than an indoor temperature, so that heat absorption is performed, thereby reducing a temperature of indoor air passing through the evaporator, and implementing a refrigeration function; and after absorbing heat, the refrigerant becomes a low-pressure gas whose temperature is raised, and flows back to the compressor for a next recirculation.
  • the electronic expansion valve A When constant temperature dehumidification needs to be performed, the electronic expansion valve A is completely opened to perform no throttling, and the throttling apparatus between evaporators performs throttling.
  • a refrigerant flows from the condenser into an evaporator 1, a temperature of the refrigerant is higher than an ambient temperature, so that heat release is performed to reduce the temperature; then after flowing through a throttling mechanism between evaporators, the liquid refrigerant becomes a low-pressure low-temperature refrigerant liquid, and flows into an evaporator 2, and a temperature of the liquid refrigerant is lower than the ambient temperature, so that heat absorption is performed to raise the temperature, and the liquid refrigerant becomes a gas and then flows back to the compressor for a recirculation. Therefore, when the refrigerant passes through the evaporator 1 and the evaporator 2, the temperature is first reduced and then raised.
  • a data center includes a communications device, and further includes: the under-loading dehumidification apparatus according to claims 1 to 8, configured to perform refrigeration and dehumidification or constant temperature dehumidification on the communications device.
  • the under-loading dehumidification and refrigeration apparatus includes:
  • the apparatus further includes the electronic expansion valve A.
  • the electronic expansion valve A When constant temperature dehumidification needs to be performed, the electronic expansion valve A is completely open to perform no throttling, and the throttling apparatus between evaporators performs throttling; and during refrigeration, the electronic expansion valve A is not completely opened, to perform throttling.
  • the evaporator is specifically configured to: disconnect the pipe in the interior of the evaporator from a preset position between an air inlet of the evaporator and an air outlet of the evaporator, to form two parts of pipes, where the pipe in the interior of the evaporator is connected between the air inlet of the evaporator and the air outlet of the evaporator, a pipe that is connected to the air inlet of the evaporator is the first evaporator section, a pipe that is connected to the air outlet of the evaporator is the second evaporator section, and one end of the throttling apparatus is connected to the first evaporator section, and the other end is connected to the second evaporator section.
  • the preset position is located in the pipe between the air inlet of the evaporator and the air outlet of the evaporator, and a setting of the preset position needs to conform to a function that the first evaporator section and the second evaporator section can respectively achieve in this embodiment.
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from any position between a position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of a distance between the pipe and the air inlet of the evaporator and a position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from any position between the position whose distance from the air inlet of the evaporator is greater than or equal to 1/3 of the distance between the pipe and the air inlet of the evaporator and the position whose distance from the air inlet of the evaporator is less than or equal to 2/3 of the distance between the pipe and the air inlet of the evaporator, to form the two parts of pipes
  • the evaporator is specifically configured to disconnect the pipe in the interior of the evaporator from a position whose distance from the air inlet of the evaporator is 1/2 of the distance between the pipe and the air inlet of the evaporator, to form two parts of pipes.
  • the under-loading dehumidification and refrigeration apparatus further includes: a dispenser, where one end of the dispenser is connected to the throttling apparatus, and the other end is connected to the second evaporator section, and the dispenser is configured to: when two or more than two groups of air inlets and air outlets exist in the pipe in the interior of the evaporator, transmit a refrigerant to a second evaporator section between an air inlet and an air outlet of each group.
  • the throttling apparatus is connected in series between the first evaporator section and the second evaporator section, and configured to reduce the temperature and the pressure of the liquid refrigerant output by the first evaporator section, and then output the liquid refrigerant to the second evaporator section, which specifically includes:
  • an electronic expansion valve A When normal refrigeration without dehumidification is performed, an electronic expansion valve A performs throttling, and a throttling apparatus between evaporators is completely opened and achieves no throttling function; a refrigerant exhausted from a compressor is a high-temperature high-pressure gas, releases heat to outdoor air when passing through a condenser, and becomes a high-temperature high-pressure refrigerant liquid, and after passing through the electronic expansion valve A, the refrigerant becomes a low-pressure low-temperature refrigerant liquid, and a temperature of the refrigerant is lower than an indoor temperature, so that heat absorption is performed, thereby reducing a temperature of indoor air passing through the evaporator, and implementing a refrigeration function; and after absorbing heat, the refrigerant becomes a low-pressure gas whose temperature is raised, and flows back to the compressor for a next recirculation.
  • the electronic expansion valve A When constant temperature dehumidification needs to be performed, the electronic expansion valve A is completely opened to perform no throttling, and the throttling apparatus between evaporators performs throttling.
  • a refrigerant flows from the condenser into an evaporator 1, a temperature of the refrigerant is higher than an ambient temperature, so that heat release is performed to reduce the temperature; then after flowing through a throttling mechanism between evaporators, the liquid refrigerant becomes a low-pressure low-temperature refrigerant liquid, and flows into an evaporator 2, and a temperature of the liquid refrigerant is lower than the ambient temperature, so that heat absorption is performed to raise the temperature, and the liquid refrigerant becomes a gas and then flows back to the compressor for a recirculation. Therefore, when the refrigerant passes through the evaporator 1 and the evaporator 2, the temperature is first reduced and then raised.
  • the present invention may be implemented by using multiple implementation manners.
  • the embodiments of the present invention may be performed by particular software/hardware components. Persons skilled in the art consider that various different software or hardware combinations may also be applied to perform the embodiments of the present invention.
  • the foregoing particular operations performed by hardware may also be implemented by software.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Gases (AREA)
  • Air Conditioning Control Device (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
EP15893991.8A 2015-05-30 2015-12-06 Leichtlastentfeuchtungs- und -kühlungsverfahren und -vorrichtung Withdrawn EP3293467A4 (de)

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CN201510298623.6A CN104896637A (zh) 2015-05-30 2015-05-30 一种轻载除湿制冷方法及装置
PCT/CN2015/096510 WO2016192347A1 (zh) 2015-05-30 2015-12-06 一种轻载除湿制冷的方法及装置

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