公开(公告)号：US11971203B2

公开(公告)日：2024-04-30

申请号：US17753563

申请日：2020-07-29

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Manabu Yoshimi ,  Takeshi Hikawa ,  Shinichi Kasahara ,  Shohei Yamada ,  Hiroyuki Kagitani ,  Hidetaka Kishimoto

IPC: F25B49/02 ,  F24F11/36 ,  F24F11/64

CPC classification number: F25B49/02 ,  F24F11/36 ,  F24F11/64 ,  F25B2400/13 ,  F25B2600/2513 ,  F25B2700/04 ,  F25B2700/21151 ,  F25B2700/21152

Abstract: A refrigerant amount determining device includes: an operation data acquiring unit configured to acquire operation data of an air conditioning system; a calculating unit configured to calculate a refrigerant amount index value from the operation data acquired; an inferring unit configured to infer information regarding correction of the refrigerant amount index value using a correction model and at least one of the acquired operation data or the calculated refrigerant amount index value; and a determining unit configured to determine a refrigerant amount of the air conditioning system based on the information regarding correction of the refrigerant amount index value.

公开(公告)号：US11959675B2

公开(公告)日：2024-04-16

申请号：US17273418

申请日：2018-11-28

Applicant: Mitsubishi Electric Corporation

Inventor： Kazuki Watanabe ,  Masahiko Takagi

IPC: F25B49/02 ,  F24F11/36 ,  F24F11/89

CPC classification number: F25B49/02 ,  F24F11/36 ,  F24F11/89 ,  F25B2313/0314 ,  F25B2500/222 ,  F25B2600/2513

Abstract: An air-conditioning apparatus includes an indoor unit and an outdoor unit connected to each other via a refrigerant pipe through which refrigerant flows. The air-conditioning apparatus includes a refrigerant sensor that detects leakage of the refrigerant in the indoor unit, a notification unit that provides a notification of occurrence of leakage of the refrigerant, a transmitter that communicates with an external terminal via a network, and a controller that controls the notification unit and the transmitter. The notification unit includes a display and a speaker disposed on a surface of a casing of the indoor unit, and the external terminal. When leakage of the refrigerant is detected by the refrigerant sensor, the controller controls the notification unit and the transmitter to provide a notification of occurrence of leakage of the refrigerant.

公开(公告)号：US11933516B2

公开(公告)日：2024-03-19

申请号：US17082101

申请日：2020-10-28

Applicant: Carrier Corporation

Inventor： Xu She ,  HanJong Kim ,  David Ginsberg

IPC: F24F11/36 ,  F24F11/38 ,  F24F11/72 ,  F24F11/88 ,  H02M7/217 ,  H02M7/537

CPC classification number: F24F11/88 ,  F24F11/36 ,  F24F11/38 ,  F24F11/72 ,  H02M7/217 ,  H02M7/537

Abstract: An exemplary heating ventilation and cooling (HVAC) system includes a multi-phase power input, an AC-DC rectifier connected to a DC-AC inverter via a DC power bus, a multi-phase power output connecting the DC-AC inverter to a fan blower motor, and at least one redundancy power system. The redundancy power system is configured to bypass at least one of the AC-DC rectifier and the DC-AC inverter.

公开(公告)号：US11920805B2

公开(公告)日：2024-03-05

申请号：US17164575

申请日：2021-02-01

Applicant: Goodman Manufacturing Company LP

Inventor： Douglas Notaro ,  Masahiro Honda ,  Mark Kendall ,  Hiroshi Yoh ,  Yenny Natali Martinez ,  Patrick Wang ,  Roberto Flores ,  Timmy Ta

IPC: F24F11/36 ,  F24F11/77 ,  F24F11/88 ,  F24F110/65

CPC classification number: F24F11/36 ,  F24F11/77 ,  F24F11/88 ,  F24F2110/65

Abstract: The present invention provides a heating, ventilation, and air-conditioning (HVAC) system using an A2L refrigerant and a method of installing the HVAC system in a building. The HVAC system includes an indoor unit having a heat exchanger that uses an A2L refrigerant, a blower, an outdoor unit, an A2L control board, and one or more A2L sensors configured to detect an amount of A2L refrigerant. In one or more embodiments, the indoor unit is electrically coupled to the blower, the A2L control board, and the outdoor unit. Also, in one or more embodiments, the A2L control board is also electrically coupled to the blower and the one or more A2L sensors.

公开(公告)号：US20240060667A1

公开(公告)日：2024-02-22

申请号：US18383805

申请日：2023-10-25

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Junya MINAMI

IPC: F24F11/36 ,  F24F11/49 ,  F24F11/52 ,  F24F11/88

CPC classification number: F24F11/36 ,  F24F11/49 ,  F24F11/52 ,  F24F11/88 ,  F24F11/58

Abstract: An air conditioning device includes a first indoor unit and a second indoor unit interlocking with a safety device as a countermeasure against refrigerant leakage. An installation assistance system for the air conditioning device determines interlock release states of the first indoor unit and the second indoor unit based on information on the air conditioning device, and outputs a determination result. The information on the air conditioning device is information indicating whether or not the first indoor unit and the second indoor unit are short-circuited with the safety device through an interlock line.

公开(公告)号：US11898764B2

公开(公告)日：2024-02-13

申请号：US18153237

申请日：2023-01-11

Applicant: Lennox Industries Inc.

Inventor： Payam Delgoshaei ,  Eric Berg

IPC: F24F11/36 ,  F24F11/84 ,  F24F11/86 ,  F24F140/12 ,  F24F140/20

CPC classification number: F24F11/36 ,  F24F11/84 ,  F24F11/86 ,  F24F2140/12 ,  F24F2140/20

Abstract: An HVAC system includes a high-pressure subsystem and a low-pressure subsystem. After determining that refrigerant leak diagnostics should be performed, a controllable valve is closed between a condenser and compressor of the HVAC system. The compressor then operates until a predetermined input refrigerant pressure is reached. After the predetermined input refrigerant pressure is reached, operation of the compressor is stopped. After stopping operation of the compressor and waiting at least a predetermined wait time, the pressure in the low-pressure subsystem of the HVAC system is monitored. A rate of change of the pressure in the low-pressure subsystem is determined. If the rate of change is negative and a magnitude of the rate of change is greater than a threshold value, a leak location is determined to be in the low-pressure subsystem.

公开(公告)号：US11885517B2

公开(公告)日：2024-01-30

申请号：US17688186

申请日：2022-03-07

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kousuke Hirai ,  Akiyoshi Yamamoto ,  Gakuto Sakai ,  Yoshitaka Matsugi ,  Tooru Fujimoto

IPC: F24F11/36 ,  F24F11/49 ,  F24F7/007 ,  F25B49/02

CPC classification number: F24F11/36 ,  F24F7/007 ,  F24F11/49 ,  F25B49/022 ,  F25B2313/0293 ,  F25B2500/222

Abstract: A system includes an air conditioning device with a heat exchanger that sends conditioned air to an air conditioned space, a ventilation device that ventilates the air conditioned space, a refrigerant sensor that detects a concentration of a refrigerant in the air conditioned space, and a control unit that controls operations of the air conditioning device and ventilation device. On determination that the refrigerant concentration acquired from the refrigerant sensor exceeds a first predetermined value, the control unit sets an operation of a compressor of the air conditioning device to a stop state and sets the ventilation device to an operating state. On determination that the refrigerant concentration that has exceeded the first predetermined value becomes equal to or less than the first predetermined value, the control unit continues the stop state of the compressor and operating state of the ventilation device until a predetermined timing.

公开(公告)号：US11867415B2

公开(公告)日：2024-01-09

申请号：US17373486

申请日：2021-07-12

Applicant: Johnson Controls Technology Company

Inventor： Steven M. Maddox ,  William F. McQuade

IPC: F24F11/00 ,  F24F11/36 ,  F24F1/022 ,  F24F11/89 ,  F24F7/007 ,  F24F11/72 ,  F24F11/70 ,  F24F1/0035 ,  F24F1/0041 ,  F24F110/65

CPC classification number: F24F11/36 ,  F24F1/0035 ,  F24F1/0041 ,  F24F1/022 ,  F24F7/007 ,  F24F11/70 ,  F24F11/72 ,  F24F11/89 ,  F24F2110/65

Abstract: The present disclosure relates to a heating, ventilating, and air conditioning (HVAC) system that includes a refrigerant circuit and a sensor configured to measure a refrigerant concentration external to the refrigeration circuit. The HVAC system also includes a controller that is communicatively coupled to the sensor and to an economizer. The controller is configured to control a flow of environmental air into the HVAC system. The controller is further configured to increase a ratio of the flow of environmental air relative to a flow of return air from a conditioned interior space of a building when the sensor measures the refrigerant concentration above a predetermined threshold concentration.

公开(公告)号：US11835245B2

公开(公告)日：2023-12-05

申请号：US18119065

申请日：2023-03-08

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Akihiro Nakano ,  Fumika Masuda ,  Seiji Oka

IPC: F24F11/36 ,  F24F11/46

CPC classification number: F24F11/36 ,  F24F11/46

Abstract: This air conditioning system includes a refrigerant circuit including an indoor heat exchanger of an indoor unit and an outdoor heat exchanger of an outdoor unit, and a detection unit capable of detecting a refrigerant leaking from the indoor unit. The detection unit is capable of switching between an energized state and a non-energized state on the basis of information on a refrigerant filling amount by which the refrigerant circuit is filled with the refrigerant.

公开(公告)号：US20230351877A1

公开(公告)日：2023-11-02

申请号：US18191836

申请日：2023-03-28

Applicant: Asahi Kasei Microdevices Corporation

Inventor： Kengo SASAYAMA ,  Takaaki FURUYA

IPC: F24F11/36 ,  G08B21/12 ,  G08B21/04

CPC classification number: G08B21/12 ,  F24F11/36 ,  G08B21/0492

Abstract: Provided is a risk information provision device including: an information acquisition unit configured to acquire risk information related to a risk depending on a status of leakage of a refrigerant in a determination target and risk handling information for handling the risk, wherein the status is determined on a basis of a concentration of the refrigerant in the determination target; a provision unit configured to provide at least one of the risk information or the risk handling information; and a date information acquisition unit configured to acquire date information of a date on which at least one of the risk information or the risk handling information is acquired. The risk handling information includes recipient information related to one or more recipients that receive the risk information. The provision unit is configured to provide at least one of the risk information or the date information to the one or more recipients.