EP3767188A1 - Échangeur de chaleur et climatiseur - Google Patents

Échangeur de chaleur et climatiseur Download PDF

Info

Publication number
EP3767188A1
EP3767188A1 EP20185546.7A EP20185546A EP3767188A1 EP 3767188 A1 EP3767188 A1 EP 3767188A1 EP 20185546 A EP20185546 A EP 20185546A EP 3767188 A1 EP3767188 A1 EP 3767188A1
Authority
EP
European Patent Office
Prior art keywords
air
heat
group
heat transfer
conditioning
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.)
Pending
Application number
EP20185546.7A
Other languages
German (de)
English (en)
Inventor
Takayuki Ishida
Hidekazu Sato
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.)
Kimura Kohki Co Ltd
Original Assignee
Kimura Kohki 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
Priority claimed from JP2019216246A external-priority patent/JP6894961B2/ja
Application filed by Kimura Kohki Co Ltd filed Critical Kimura Kohki Co Ltd
Publication of EP3767188A1 publication Critical patent/EP3767188A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by 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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to 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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F5/0089—Systems using radiation from walls or panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0417—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a circular cross-section
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21174—Temperatures of an evaporator of the refrigerant at the inlet of the 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the 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
    • 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
    • F25B39/04—Condensers
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles

Definitions

  • the present disclosure relates to a heat exchanger and an air conditioner including the heat exchanger.
  • heat exchangers used in air conditioners such as a fan coil unit and an air handling unit
  • some heat exchangers including a heat transfer part that exchanges heat between an air-conditioning air and a heat exchanging medium.
  • the heat exchanger is configured to adjust a heat exchange amount by increasing or decreasing a flow rate of the heat exchanging medium and control capacity to cool or heat the air-conditioning air.
  • a heat transfer part including a heat transfer pipe group as disclosed in Japanese Laid-Open Patent Application Publication No. 2001-280859 .
  • a lower limit of the flow rate of the heat exchanging medium is reduced by equally dividing the heat transfer pipe group of the heat transfer part into two groups, and thus, a control range of a lower limit in a capacity of the heat exchanger can be widened.
  • the present disclosure provides a heat exchanger that improves energy saving and comfortability, and an air conditioner including the heat exchanger.
  • a heat exchanger includes a heat transfer part that exchanges heat between an air-conditioning air and a heat exchanging medium, and a control device that adjusts a heat exchange amount between the air-conditioning air and the heat exchanging medium.
  • the heat transfer part includes a flow dividing circuit configured to divide a heat transfer pipe group through which the heat exchanging medium flows into a plurality of groups and cause grouping ratios to be different from each other, and the control device is configured to increase or decrease a flow rate of the heat exchanging medium in a first group having a smaller grouping ratio among the plurality of groups in a case of a low air conditioning load.
  • the energy saving and the comfortability can be improved.
  • heat exchangers used in air conditioners there are some heat exchangers including a heat transfer part that exchanges heat between an air-conditioning air and a heat exchanging medium.
  • the heat exchanger is configured to adjust a heat exchange amount by increasing or decreasing a flow rate of the heat exchanging medium and control capacity to cool or heat the air-conditioning air.
  • a lower limit of the flow rate of the heat exchanging medium is reduced by dividing a heat transfer pipe group included in the heat exchanger into two groups, and thus, a control range of a lower limit in a capacity of a heat exchange coil of the heat exchanger can be widened.
  • the lower limit of the flow rate of the heat exchanging medium is limited to a certain limit.
  • the heat exchanger in a low air conditioning load region in which the heat exchange is sufficiently performed with a small heat exchange amount (heat transmission amount), the heat exchanger overcools or overheats due to excessive capacity, and thus, there is a problem that a temperature difference of the heat exchanging medium before and after the heat exchange caused by the heat exchange of the heat exchanger is not constant.
  • the present inventors have studied a heat exchanger that improves the energy saving and the comfortability.
  • a pneumatic radiation air conditioner disclosed in Japanese Laid-Open Patent Application Publication No. 2011-145045 includes an air supply part that is provided such that an air cooled or heated by a heat exchanger generates an air jet, an air induction part that is provided such that an air of an air-conditioned space is drawn into by an induction action of the air jet discharged from the air supply part, and an air mixing part that is provided such that an air mixture of the air jet of the air supply part and the induction air of the air induction part is discharged to the air-conditioned space and heat of the air mixture is radiated to the air-conditioned space.
  • the present inventors have studied a simple pneumatic radiation air conditioner capable of cooling at a blowout temperature exceeding a dew point temperature without an induction reheating function while improving energy saving and comfortability by a heat exchanger.
  • a heat exchanger includes a heat transfer part that exchanges heat between an air-conditioning air and a heat exchanging medium, and a control device that adjusts a heat exchange amount between the air-conditioning air and the heat exchanging medium.
  • the heat transfer part includes a flow dividing circuit configured to divide a heat transfer pipe group through which the heat exchanging medium flows into a plurality of groups and cause grouping ratios to be different from each other, and the control device is configured to increase or decrease a flow rate of the heat exchanging medium in a first group having a smaller grouping ratio among the plurality of groups in a case of a low air conditioning load.
  • the heat exchanger can further lower the lower limit of the flow rate of the heat exchanging medium by increasing or decreasing the flow rate of the heat exchanging medium in the first group of the flow dividing circuit in the case of the low air conditioning load. Therefore, the control range of the capacity of the heat exchanger becomes wider toward the lower limit, and the capacity of the heat exchanger does not become excessive even in the case of the low air conditioning load. Therefore, energy waste, overcooling, and overheating are reduced, and energy saving and comfortability are improved.
  • the heat exchanger can perform the control such that the temperature difference of the heat exchanging medium before and after the heat exchange is constant.
  • the heat exchanger when such a heat exchanger is used in an air conditioner, it is possible to operate the air conditioner with a small water amount and a large temperature difference.
  • the small amount of water it is possible to simplify piping and air conditioning facilities for the air conditioner.
  • the large temperature difference it is possible to save energy of a heat source device that transmits and receives water as the heat exchanging medium to and from the heat exchanger and adjusts the temperature of the water.
  • non-overlapping zones which do not overlap the first group may be formed in a second group having a grouping ratio larger than the grouping ratio of the first group among the plurality of groups when viewed in an air flow direction of the air-conditioning air passing through the heat transfer part, and the non-overlapping zones may be located so as to sandwich the first group.
  • the overcooled and dehumidified air overcooled and dehumidified by passing through the first group may pass through the non-overlapping zones, and may be reheated by a bypass air which has a higher temperature than the overcooled and dehumidified air. Accordingly, dry air without an unpleasant cooling sensation can be obtained.
  • the overcooled and dehumidified air is sandwiched by the bypass air so as not to escape, the overcooled and dehumidified air is promoted to be mixed with the bypass air. Therefore, the overcooled and dehumidified air can be reliably reheated.
  • the air conditioning can be performed by using a crisp air flow without a cold draft, and thus, comfortability is improved. Since a device such as a bypass damper for adjusting the flow rate of the bypass air is not required, cost reduction and compactness can be achieved.
  • the first group may be a group having a smallest grouping ratio.
  • the heat exchanger can minimize the lower limit of the flow rate of the heat exchanging medium by increasing or decreasing the flow rate of the heat exchanging medium in the first group, and can widen the control range of the capacity of the heat exchanger toward the lower limit.
  • the heat exchanger according to the aspect of the present disclosure may further include valves that are provided in the groups, respectively, and adjust the flow rate of the heat exchanging medium that flows in, and a valve controller that controls operations of the valves.
  • the control device may increase or decrease the flow rate of the heat exchanging medium of each of the group by causing the valve controller to control the valves.
  • the heat exchanger can perform the control of the group through which the heat exchanging medium flows and the control of the flow rate of the heat exchanging medium in the group by controlling the valves.
  • the heat transfer pipe group may include a plurality of elliptical pipes.
  • a dead water region of the heat transfer pipe group is reduced. Ventilation resistance of the heat transfer pipe group is reduced, and thus, energy saving can be achieved.
  • a contact area (heat transmission amount) between the heat transfer pipe group and the air-conditioning air is increased, and thus, heat exchange efficiency is improved. Accordingly, for example, when the heat exchanging medium is water, the small water amount and large temperature difference operation of an air conditioner using the heat exchanger can be performed without increasing (enlarging) the heat transfer area of the heat exchanger.
  • An air conditioner includes the heat exchanger according to the aspect of the present disclosure, a radiation unit that radiates heat of the air-conditioning air while discharging the air-conditioning air to an air-conditioned space, and a fan that sends the air-conditioning air to the radiation unit.
  • the radiation unit may include a group of through-holes that allows the air-conditioning air to be discharged therethrough to the air-conditioned space, and a heat storage.
  • the heat storage may include a group of heat transfer plates disposed with gaps through which the air-conditioning air passes.
  • the group of the heat transfer plates may be configured to allow the air-conditioning air to pass through the group of the heat transfer plates in a straightened flow manner while being divided and diffused by the group of the heat transfer plates and discharge to the air-conditioned space through the through-holes, and configured to store the heat of the air-conditioning air and radiate the heat to the air-conditioned space through the through-holes.
  • the air conditioner in which the heat exchanger, the fan, and the radiation unit are integrated can be obtained, manufacturing of the air conditioner and construction for the air conditioner can be simplified, and the cost can be reduced.
  • the heat storage can be used for both storing the heat of the air-conditioning air and straightening the flow of the air-conditioning air. Therefore, heat radiation capacity is improved, and comfortable air conditioning without air volume unevenness and temperature unevenness can be performed.
  • FIGS. 1 to 3 illustrate examples of the configuration of the heat exchanger 100 according to the embodiment.
  • the heat exchanger 100 includes a heat transfer part 1 that cools or heats an air-conditioning air A by exchanging heat between the air-conditioning air A and a heat exchanging medium M, and a control device 2 that adjusts the heat exchange amount between the air-conditioning air A and the heat exchanging medium M.
  • Outlined arrows in the drawings indicate an air flow direction of the air-conditioning air A.
  • the heat transfer part 1 includes a fin group 3 and a flow dividing circuit 4.
  • the fin group 3 includes multiple plate fins 5.
  • the multiple plate fins 5 are disposed with gaps such that the air-conditioning air A passes therebetween.
  • the gaps between the plate fins 5 may extend in the air flow direction of the air-conditioning air A.
  • the flow dividing circuit 4 is configured to divide a heat transfer pipe group 6, which is a group of a plurality of heat transfer pipes through which the heat exchanging medium M flows, into a plurality of groups G, that is, to separate the heat transfer pipe group 6 into the plurality of groups G.
  • the flow dividing circuit 4 is further configured such that grouping ratios between the plurality of groups G are different from each other. Accordingly, heat transfer areas (heat exchange amount) can be different between some or all of the groups G.
  • the flow dividing circuit 4 divides, as the groups G, the heat transfer pipe group 6 into a first group G1 indicated by a thicker dashed-dotted line and a second group G2 which is obtained by excluding the first group G1 from the heat transfer pipe group 6 and is indicated by a thinner dashed-dotted line.
  • the flow dividing circuit 4 divides the heat transfer pipe group 6 into two groups.
  • the first group G1 is a group having a smaller grouping ratio.
  • the group having a smaller grouping ratio may be a group having a smaller grouping ratio than a certain group among the plurality of groups.
  • the first group G1 may be a group having the smallest grouping ratio.
  • the group having the smallest grouping ratio may be a single group among the plurality of groups.
  • the number of groups having the smallest grouping ratio may be only one or may be two or more among the plurality of groups.
  • the second group G2 is a group having a larger grouping ratio, and is, for example, a group having a grouping ratio larger than the first group G1.
  • the number of groups having the grouping ratio larger than the first group G1 may be two or more among the plurality of groups.
  • the heat transfer pipe group 6 meanders in a zigzag manner so as to traverse the air flow direction of the air-conditioning air A, and is connected to the plate fins 5 of the fin group 3 to be heat-transferable.
  • a straight pipe portion of the heat transfer pipe constituting the heat transfer pipe group 6 is preferably formed as an elliptical pipe, but may be formed as a circular pipe, etc.
  • the grouping ratio may be a ratio of the heat transfer pipes.
  • the ratio of the heat transfer pipes may be a ratio such as a ratio of the total amount of a critical flow rate of the heat transfer pipes of each group to the total amount of a critical flow rate of all the heat transfer pipes, a ratio of the total number of the heat transfer pipes of each group to the total number of all the heat transfer pipes, a ratio of the total amount of a flow passage cross-sectional area of the heat transfer pipes of each group to the total amount of a flow passage cross-sectional area of all the heat transfer pipes, a ratio of the total length of the heat transfer pipes of each group to the total length of all the heat transfer pipes, a ratio of the total amount of a heat transfer area (such as a surface area) of the heat transfer pipes of each group to the total amount of a heat transfer area of all the heat transfer pipes, and a ratio of the total volume of a heat-exchangeable region of the heat transfer pipes of each group, in which the heat exchange is executable, to the total volume of
  • each group G of the first group G1 and the second group G2 includes a group of heat transfer pipes that form continuous pipes that communicate with each other via the branching header 7a or 7b, etc.
  • the branching headers 7a and 7b are respectively connected to outgoing piping 10 via valves 9a and 9b.
  • the confluence header 8 is connected to return piping 11. Accordingly, the inlet of the heat exchanging medium M of each of the first group G1 and the second group G2 communicates with the outgoing piping 10, and the outlet of the heat exchanging medium M of each of the first group G1 and the second group G2 communicates with the return piping 11.
  • the temperature-adjusted heat exchanging water to be sent from the heat source device may flow through the outgoing piping 10, and the heat exchanging water after the heat exchange to be sent from the heat exchanger 100 to the heat source device may flow through the return piping 11.
  • the control device 2 includes the valves 9a and 9b that adjust a flow rate of the heat exchanging medium M, and a valve controller 12 that controls operations of the valves 9a and 9b.
  • the valves 9a and 9b may be proportional control valves capable of steplessly adjusting the flow rate (for example, a valve opening degree), and are provided in each group G of the flow dividing circuit 4.
  • the valve controller 12 controls the operation of the valve 9a to increase or decrease the flow rate of the heat exchanging medium M in the first group G1 of the flow dividing circuit 4 such that a temperature difference of the heat exchanging medium M before and after the heat exchange caused by the heat exchange of the heat transfer part 1 is constant.
  • the valve controller 12 controls the operations of the valves 9a and 9b to increase or decrease the flow rate of the heat exchanging medium M in all the groups G such that the temperature difference of the heat exchanging medium M before and after the heat exchange caused by the heat exchange of the heat transfer part 1 is constant.
  • the valve controller 12 controls the operation of the valve 9b to increase or decrease the flow rate of the heat exchanging medium M in the second group G2 such that the temperature difference of the heat exchanging medium M before and after the heat exchange caused by the heat exchange of the heat transfer part 1 is constant.
  • the heat exchanger 100 can widely cope with a small water amount and large temperature difference operation of an air conditioner using the heat exchanger 100 from the case of the high air conditioning load requiring a maximum heat exchange amount such as midsummer and midwinter to the case of the low air conditioning load requiring a small heat exchange amount such as intermediate seasons.
  • control device 2 may be realized by a computer system (not illustrated) that includes a processor such as a Central Processing Unit (CPU), a volatile memory such as a Random Access Memory (RAM), and a nonvolatile memory such as a Read-Only Memory (ROM) and so on. Such functions may be realized by the CPU executing a program recorded in the ROM by using the RAM as a work area.
  • a dedicated hardware circuit such as an electronic circuit or an integrated circuit or the like, or may be realized by a combination of the computer system and the hardware circuit.
  • some or all of the functions of the valve controller 12 may be realized by a dedicated hardware circuit, or may be realized by a combination of the computer system and the hardware circuit.
  • the flow dividing circuit 4 forms, in the second group G2, a plurality of non-overlapping zones F which are zones that do not overlap with the first group G1 when viewed in the air flow direction (a direction of the outlined arrow of FIG. 2 ) of the air-conditioning air A passing through the heat transfer part 1.
  • the plurality of non-overlapping zones F are located such that the first group G1 is sandwiched between the non-overlapping zones F.
  • FIG. 4 is a bottom perspective view illustrating an example of a configuration of the air conditioner 200 according to the embodiment.
  • FIG. 5 is a bottom view of the air conditioner 200 illustrated in FIG. 4 .
  • FIG. 6 is a cross-sectional view of the air conditioner 200 illustrated in FIG. 5 taken along line VI-VI.
  • FIG. 7 is a cross-sectional view of the air conditioner 200 illustrated in FIG. 6 taken along line VII-VII.
  • the air conditioner 200 includes the heat exchanger 100 according to the embodiment and is a pneumatic radiation air conditioner will be described below.
  • the air conditioner 200 includes a radiation unit 201 that radiates the heat of the air-conditioning air while discharging the air-conditioning air into an air-conditioned space S, the heat exchanger 100 that performs heat exchange between an outdoor air, a return air, or an air mixture thereof as the air-conditioning air and the heat exchanging medium, and a fan 203 that sends the air-conditioning air to the radiation unit 201.
  • the air conditioner 200 includes a drain pan 204, a casing 205, and the control device 2.
  • the casing 205 accommodates the radiation unit 201, the heat exchanger 100, the fan 203, and the drain pan 204.
  • the air conditioner 200 is installed on a ceiling CB of the air-conditioned space S, etc., in a state in which a bottom surface of the radiation unit 201 is exposed toward the air-conditioned space S. Thick dashed arrows in FIGS. 4 to 7 indicate a flow direction of the air-conditioning air.
  • the radiation unit 201 includes a chamber 212 through which the air-conditioning air flows, a group of through-holes 207 formed in a bottom of the chamber 212, and a heat storage 208 provided in the chamber 212.
  • the heat storage 208 includes a group of heat transfer plates 209 that can store the heat of the air-conditioning air that is in contact therewith and radiate the heat to the air-conditioned space S through the through-holes 207.
  • the group of the heat transfer plates 209 is disposed with gaps through which the air-conditioning air passes.
  • the group of the heat transfer plates 209 is configured to allow the air-conditioning air to pass therethrough in a straightened flow manner while being divided and diffused by the group of the heat transfer plates 209 and discharge into the air-conditioned space S through the through-holes 207.
  • the heat of the air-conditioning air is transferred to the group of the heat transfer plates 209, and the transferred heat is radiated from the group of the heat transfer plates 209 to the air-conditioned space S through the group of the through-holes 207.
  • the casing 205 includes a return air inlet portion 210 and an outdoor air inlet portion 211.
  • the return air inlet portion 210 is configured to take in air (return air) in the air-conditioned space S via a ceiling chamber T formed in a ceiling plenum space and a duct (not illustrated) and so on.
  • the outdoor air inlet portion 211 is configured to take in the outdoor air, and is connected to the outside through a duct 223.
  • the fan 203 sends the return air taken in from the return air inlet portion 210 and the outdoor air taken in from the outdoor air inlet portion 211 to cause the return air and the outdoor air to pass through the heat exchanger 100 and cause the passed return air and outdoor air to flow into the radiation unit 201.
  • the heat exchanger 100 may have a structure for exchanging heat between cold water or hot water as the heat exchanging medium and the air-conditioning air, a structure for exchanging heat between a refrigerant such as chlorofluorocarbons as the heat exchanging medium and the air-conditioning air, or a structure for exchanging heat between another exchange medium and the air-conditioning air.
  • the heat exchanger 100 has a structure for exchanging heat between the cold water or the hot water and the air-conditioning air. The heat exchanger 100 cools or heats the air-conditioning air by exchanging the heat between the air-conditioning air and the heat exchanging medium.
  • the control device 2 includes the valves 9a and 9b for adjusting the flow rate of the heat exchanging medium flowing to the heat exchanger 100, the valve controller 12 for controlling the operations of the valves 9a and 9b, and a temperature difference detector (not illustrated).
  • the temperature difference detector detects the temperature difference of the heat exchanging medium before and after the heat exchange caused by the heat exchange with the air-conditioning air in the heat exchanger 100, based on the temperature of the heat exchanging medium flowing into the branching headers 7a and 7b of the heat exchanger 100 and the temperature of the heat exchanging medium flowing out from the confluence header 8.
  • control device 2 increases or decreases the flow rate of the heat exchanging medium in each group G of the heat transfer pipe group 6 by causing the valve controller 12 to control the valves 9a and 9b based on the detected temperature difference of the heat exchanging medium before and after the heat exchange.
  • the heat transfer pipe group may be divided into three or more groups G.
  • the grouping ratio of one of the groups G may be freely minimized.
  • the heat exchanger 100 can be freely configured to have a structure in which an aqueous solution, a refrigerant such as chlorofluorocarbons, and another heat exchanging medium are used as the heat exchanging medium in addition to the water.
  • the heat exchanging medium may be any of a gas or a liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air Conditioning Control Device (AREA)
EP20185546.7A 2019-07-18 2020-07-13 Échangeur de chaleur et climatiseur Pending EP3767188A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019132375 2019-07-18
JP2019216246A JP6894961B2 (ja) 2019-11-29 2019-11-29 空気式放射空調機

Publications (1)

Publication Number Publication Date
EP3767188A1 true EP3767188A1 (fr) 2021-01-20

Family

ID=71607813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20185546.7A Pending EP3767188A1 (fr) 2019-07-18 2020-07-13 Échangeur de chaleur et climatiseur

Country Status (3)

Country Link
EP (1) EP3767188A1 (fr)
CN (2) CN112240608B (fr)
AU (1) AU2020205244B2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112240608B (zh) * 2019-07-18 2023-06-27 木村工机株式会社 热交换器及空调机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001280859A (ja) 2000-03-31 2001-10-10 Kimura Kohki Co Ltd 少水量用熱交換コイル
DE10259572A1 (de) * 2002-12-19 2004-07-15 Daimlerchrysler Ag Wärmetauscheranordnung
JP2007322024A (ja) * 2006-05-30 2007-12-13 Kimura Kohki Co Ltd 大温度差空調システム
JP2011145045A (ja) 2009-12-17 2011-07-28 Kimura Kohki Co Ltd 誘引放射空調機
EP2833082A1 (fr) * 2012-03-29 2015-02-04 Mitsubishi Electric Corporation Dispositif de conditionnement d'air
US20160033179A1 (en) * 2014-08-01 2016-02-04 Lg Electronics Inc. Air conditioner
US20160040896A1 (en) * 2014-08-05 2016-02-11 Samsung Electronics Co., Ltd. Air conditioner
CN105352344A (zh) * 2015-11-23 2016-02-24 广东美的制冷设备有限公司 一种平行流换热器及含有其的空调和空调的控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015045478A (ja) * 2013-08-29 2015-03-12 株式会社日立製作所 熱搬送システム
JP5775185B2 (ja) * 2014-01-24 2015-09-09 木村工機株式会社 熱交換コイル及び空気調和機
CN108139106B (zh) * 2015-10-26 2020-10-30 三菱电机株式会社 空气调节装置
CN107166454B (zh) * 2016-10-18 2019-03-12 广州市新新厨具制造有限公司 一种燃气灶可调节废热回收方法及装置
JP2019105397A (ja) * 2017-12-12 2019-06-27 日本ピーマック株式会社 空気調和装置及び空気調和システム
CN112240608B (zh) * 2019-07-18 2023-06-27 木村工机株式会社 热交换器及空调机

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001280859A (ja) 2000-03-31 2001-10-10 Kimura Kohki Co Ltd 少水量用熱交換コイル
DE10259572A1 (de) * 2002-12-19 2004-07-15 Daimlerchrysler Ag Wärmetauscheranordnung
JP2007322024A (ja) * 2006-05-30 2007-12-13 Kimura Kohki Co Ltd 大温度差空調システム
JP2011145045A (ja) 2009-12-17 2011-07-28 Kimura Kohki Co Ltd 誘引放射空調機
EP2833082A1 (fr) * 2012-03-29 2015-02-04 Mitsubishi Electric Corporation Dispositif de conditionnement d'air
US20160033179A1 (en) * 2014-08-01 2016-02-04 Lg Electronics Inc. Air conditioner
US20160040896A1 (en) * 2014-08-05 2016-02-11 Samsung Electronics Co., Ltd. Air conditioner
CN105352344A (zh) * 2015-11-23 2016-02-24 广东美的制冷设备有限公司 一种平行流换热器及含有其的空调和空调的控制方法

Also Published As

Publication number Publication date
CN112240608B (zh) 2023-06-27
AU2020205244A1 (en) 2021-02-04
AU2020205244B2 (en) 2021-06-17
CN212408875U (zh) 2021-01-26
CN112240608A (zh) 2021-01-19

Similar Documents

Publication Publication Date Title
US4104890A (en) Air conditioning apparatus
JP5805833B1 (ja) ヒートポンプ式空気調和機
JP3997482B2 (ja) 水熱源空調システム
JP6151409B2 (ja) ヒートポンプ式熱源装置
US4485642A (en) Adjustable heat exchanger air bypass for humidity control
CA3052746C (fr) Conditionneur d`air a rayonnement pneumatique
EP3726153A1 (fr) Système de climatisation
EP3767188A1 (fr) Échangeur de chaleur et climatiseur
JP5775185B2 (ja) 熱交換コイル及び空気調和機
US11959647B2 (en) Air-conditioning unit having a coil with an active portion and an inactive portion
JP6084737B1 (ja) 空気調和システム
JP6862504B2 (ja) セパレート設置空調システム
JP6894961B2 (ja) 空気式放射空調機
JP6764599B1 (ja) 空気調和システム
JP6873194B2 (ja) 空気調和装置
JPH11287475A (ja) 空気調和装置
JP7030172B1 (ja) ヒートポンプ式空調機
US20200348030A1 (en) Air conditioner
JP5817058B2 (ja) 熱交換ユニット及び温度調整装置
JPH04222363A (ja) ヒートポンプエアコンの室内熱交換器
JPH0213749A (ja) 空気調和機
JPWO2023181374A5 (fr)
JPH06300311A (ja) 空気調和装置
JP2002264639A (ja) 車両用空調装置
JP2003104043A (ja) 熱交換装置及びこれを用いた車両用空調装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200713

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20221026

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SATO, HIDEKAZU

Inventor name: ISHIDA, TAKAYUKI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SATO, HIDEKAZU

Inventor name: ISHIDA, TAKAYUKI