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    Air-conditioning system with variable subcooling
    1.
    发明授权
    Air-conditioning system with variable subcooling 有权

    公开(公告)号：US12055316B2

    公开(公告)日：2024-08-06

    申请号：US17948071

    申请日：2022-09-19

    Applicant: Addison HVAC LLC

    Inventor： Gus Daniel Olivera

    IPC: F24F3/153 ,  F24F13/30 ,  F25B41/20

    CPC classification number: F24F3/153 ,  F24F13/30 ,  F25B41/20 ,  F25B2600/25

    Abstract: A dedicated outside air-conditioning system (DOAS) that may automatically generate variable subcooling refrigerant delivered to the evaporator; and modulate hot discharge gas to reduce the relative humidity of the discharge air from the DOAS. The DOAS may include fluid control valves configured to regulate delivery of the refrigerant in order to seamlessly flex between maximum latent capacity (minimum discharge dewpoint) and maximum sensible capacity (minimum leaving air discharge dry bulb temperature) to match load and/or ventilation air requirements.

    System and method for ventilating and dehumidifying a space
    4.
    发明授权
    System and method for ventilating and dehumidifying a space 有权

    公开(公告)号：US11959660B2

    公开(公告)日：2024-04-16

    申请号：US18204710

    申请日：2023-06-01

    Applicant: Kentuckiana Curb Company, Inc.

    Inventor： Jordan Scott Reynolds ,  William Dale Keen

    IPC: F24F3/14 ,  F24F3/153 ,  F24F11/86 ,  F24F140/12

    CPC classification number: F24F3/1405 ,  F24F3/153 ,  F24F11/86 ,  F24F2140/12

    Abstract: A dedicated outdoor air system (DOAS) includes an outdoor unit providing a temperature at a set dry bulb temperature and dew point temperature in a wide variety of outdoor air conditions. The DOAS monitors and modulates suction pressure and head pressure in order to maintain a dew point temperature of 45° F. for supplied air. Furthermore, the DOAS includes a hot gas reheat coil, allowing the system to heat the air to 73° F. before supplying the air to a space, even where outdoor air temperature is lower than 73° F. In one embodiment, the DOAS includes an energy recovery ventilator (ERV) in order to precondition the air to decrease the amount of energy needed to operate the DOAS in some conditions.

    Preventing evaporator coil freeze during re-heat dehumidification
    5.
    发明授权
    Preventing evaporator coil freeze during re-heat dehumidification 有权

    公开(公告)号：US11927362B2

    公开(公告)日：2024-03-12

    申请号：US17994523

    申请日：2022-11-28

    Applicant: Lennox Industries Inc.

    Inventor： Rakesh Goel ,  Siddarth Rajan

    IPC: F24F3/14 ,  F24F3/153 ,  F25B47/00 ,  G05B15/02

    CPC classification number: F24F3/1405 ,  F24F3/153 ,  F25B47/006 ,  G05B15/02 ,  F24F2003/144

    Abstract: In an embodiment, a method of preventing evaporator coil freeze in a heating, ventilation and air conditioning (HVAC) system includes determining a reference saturated suction temperate (SST) via a sensor disposed in relation to an evaporator coil in the HVAC system, where the HVAC system is operating in reheat dehumidification mode. The method also includes determining whether the reference SST is below a minimum SST threshold. The method also includes, responsive to a determination that the reference SST is below the minimum SST threshold, determining a decreased compressor speed. The method also includes modulating a variable-speed compressor in the HVAC system in correspondence to the decreased compressor speed.

    AIR CONDITIONER AND CONTROL METHOD THEREOF
    6.
    发明公开
    AIR CONDITIONER AND CONTROL METHOD THEREOF 审中-公开

    公开(公告)号：US20240044542A1

    公开(公告)日：2024-02-08

    申请号：US18485505

    申请日：2023-10-12

    Applicant: QINGDAO HISENSE HITACHI AIR-CONDITIONING SYSTEMS CO., LTD.

    Inventor： Yulei ZHAO ,  Haibin LU ,  Heng ZHANG ,  Chen DONG ,  Jia PENG ,  Tingyu LI

    IPC: F24F11/67 ,  F24F3/153

    CPC classification number: F24F11/67 ,  F24F3/153 ,  F24F2110/10

    Abstract: Some embodiments of the present disclosure provide an air conditioner and a control method thereof. The air conditioner includes an outdoor unit, an indoor unit, a temperature sensor, a humidity sensor, and a controller. The temperature sensor is configured to detect a first indoor temperature and a second indoor temperature. The humidity sensor is configured to detect a first indoor humidity and a second indoor humidity. The controller is configured to control the air conditioner to operate in a reheat dehumidification mode if it is determined that a first preset condition is satisfied, control the air conditioner to operate in a cooling mode if it is determined that the first preset condition is not satisfied, and control the air conditioner to enter a shutdown state if it is determined that one of a second preset condition and a third preset condition is satisfied.

    High-pressure re-start control algorithm for microchannel condenser with reheat coil
    8.
    发明授权
    High-pressure re-start control algorithm for microchannel condenser with reheat coil 有权

    公开(公告)号：US11708981B2

    公开(公告)日：2023-07-25

    申请号：US17208795

    申请日：2021-03-22

    Applicant: Lennox Industries Inc.

    Inventor： Colin Clara ,  Eric Perez ,  Walter E. Davis, II

    IPC: F24F3/153 ,  F25B41/20 ,  F24F3/14

    CPC classification number: F24F3/153 ,  F25B41/20 ,  F24F3/1405 ,  F25B2600/17

    Abstract: An HVAC system with a reheat coil is described, the system includes a compressor, a micro-channel condenser and an evaporator. A reversing valve is connected to the compressor, the micro-channel condenser and the reheat coil. The reversing valve is used to direct the refrigerant from the compressor to the micro-channel condenser in a normal mode, and to direct the refrigerant from the compressor to the reheat coil in a reheat mode. The reversing valve can be switched from normal mode to reheat mode when a high pressure condition is detected at an input to the micro-channel condenser, and switched back from reheat mode to normal mode when the high pressure condition has resolved or an amount of time has passed. In the normal mode the refrigerant is returned from the reheat coil into a refrigerant line between the evaporator and the compressor through a restrictor.

    Water source heat pump head pressure control for hot gas reheat
    9.
    发明授权
    Water source heat pump head pressure control for hot gas reheat 有权

    公开(公告)号：US11624518B2

    公开(公告)日：2023-04-11

    申请号：US17234053

    申请日：2021-04-19

    Applicant: Daikin Applied Americas Inc.

    Inventor： Marcos Locke ,  Benny DiMarco

    IPC: F25B13/00 ,  F24F3/153 ,  F25B30/02 ,  F25B49/02

    Abstract: A method of conditioning air includes controlling a secondary refrigerant flow control valve to select between a first mode in which refrigerant flows from a discharge line to a main refrigerant flow control valve, and a second mode in which refrigerant flows from the discharge line to a gas reheat heat exchanger and then flows to the main refrigerant flow control valve. A heat transfer medium flow control valve is controlled to adjust the flow of the heat transfer medium into a heat source side heat exchanger. The heat transfer medium flow control valve allows the heat transfer medium to flow to the heat source side heat exchanger when the secondary refrigerant flow control valve is in the first mode, and adjusts the flow of the heat transfer medium to the heat source side heat exchanger when the secondary refrigerant flow control valve is in the second mode.

    AIR-CONDITIONING SYSTEM WITH VARIABLE SUBCOOLING
    10.
    发明申请
    AIR-CONDITIONING SYSTEM WITH VARIABLE SUBCOOLING 有权

    公开(公告)号：US20230092476A1

    公开(公告)日：2023-03-23

    申请号：US17948071

    申请日：2022-09-19

    Applicant: Addison HVAC LLC

    Inventor： Gus Daniel Olivera

    IPC: F24F3/153 ,  F24F13/30 ,  F25B41/20

    Abstract: A dedicated outside air-conditioning system (DOAS) that may automatically generate variable subcooling refrigerant delivered to the evaporator; and modulate hot discharge gas to reduce the relative humidity of the discharge air from the DOAS. The DOAS may include fluid control valves configured to regulate delivery of the refrigerant in order to seamlessly flex between maximum latent capacity (minimum discharge dewpoint) and maximum sensible capacity (minimum leaving air discharge dry bulb temperature) to match load and/or ventilation air requirements.

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