公开(公告)号：US11662116B2

公开(公告)日：2023-05-30

申请号：US16649408

申请日：2018-09-11

Applicant: Mitsubishi Electric Corporation

Inventor： Mio Motodani ,  Hiroyuki Waku

IPC: F24F11/74 ,  F24F11/88 ,  F24F7/00 ,  F24F3/14 ,  F24F7/007 ,  F24F3/147 ,  F24F110/20 ,  F24F130/10 ,  F24F140/10 ,  F24F110/12 ,  F24F140/12

CPC classification number: F24F11/74 ,  F24F3/147 ,  F24F7/007 ,  F24F11/88 ,  F24F2110/12 ,  F24F2110/20 ,  F24F2130/10 ,  F24F2140/10 ,  F24F2140/12

Abstract: A ventilator (1) includes: an air supply fan (2) to supply outdoor air to a room; an air exhaust fan (3) to exhaust indoor air, out of the room; and a total heat exchanger (4) which is made with partition boards (41) being moisture-permeable flat parts and with spacer boards (42) being corrugated parts, the partition boards and the spacer boards being alternately stacked, the total heat exchanger exchanging heat between the outdoor air and the indoor air; and thereby suppresses ice formation. The ventilator (1) includes: an indoor temperature sensor (7); an indoor humidity sensor (8); an outdoor temperature sensor (6); and a control unit (5) to control operation of the air supply fan (2) and the air exhaust fan (3) on a basis of at least one state quantity estimated by substituting the indoor air temperature, the indoor air humidity, and the outdoor air temperature in a total heat exchanger model formula (51a) representing characteristics of the total heat exchanger (4).

公开(公告)号：US20190203966A1

公开(公告)日：2019-07-04

申请号：US16230422

申请日：2018-12-21

Applicant: The Board of Regents of the University of Oklahoma

Inventor： Li Song ,  Gang Wang

IPC: F24F11/49 ,  F16K37/00 ,  F24F11/84

CPC classification number: F24F11/49 ,  F16K37/0083 ,  F24F11/84 ,  F24F2110/30 ,  F24F2140/10 ,  F24F2140/12

Abstract: Flow device systems for use in an HVAC system (“HVAC”) are described. The system may include a controller receiving sensor signals including differential pressure, valve commands, fan/pump speed, and fan/pump motor power signal from the HVAC. The controller transmits override valve commands for multiple valve positions of the valve and multiple speeds of the fan and pump. A characteristic curve may be determined from the signals provided from the HVAC and the measured flow rate at each valve position or fan/pump speed during transmission of the plurality of override valve commands for the valve positions of the valve and fan/pump speed for fan/pump operation frequencies. Virtual flow rate through the valve, fan or pump is determined using the characteristic curve. In addition, valve dynamic behavior is determined using valve stiction and valve stiction plus deadband. Valve commands are updated based on valve dynamic behavior and a valve characteristic curve.

公开(公告)号：US11796201B2

公开(公告)日：2023-10-24

申请号：US17235186

申请日：2021-04-20

Applicant: Lennox Industries Inc.

Inventor： Amita Brahme ,  Umesh Gokhale

IPC: F24F11/38 ,  F24F11/49 ,  F24F11/52 ,  F24F130/10 ,  F24F140/20 ,  F24F140/10 ,  F24F110/12

CPC classification number: F24F11/38 ,  F24F11/49 ,  F24F11/52 ,  F24F2110/12 ,  F24F2130/10 ,  F24F2140/10 ,  F24F2140/20

Abstract: An HVAC system includes a suction-side sensor, a liquid-side sensor, an outdoor temperature sensor, and a controller. The controller determines that initial criteria are satisfied for initiating validation of the suction-side sensor and the liquid-side sensor. After determining that the initial criteria are satisfied, a suction-side property value, liquid-side property value, and outdoor temperature value are received. The controller determines whether a first validation criteria and a second validation criteria are satisfied. If both the first validation criteria and the second validation criteria are satisfied, the suction-side sensor, the liquid-side sensor, and the outdoor temperature sensor are determined to be functioning properly. Otherwise, the controller determines which one or more of the sensors are malfunctioning.

公开(公告)号：US20180238580A1

公开(公告)日：2018-08-23

申请号：US15749967

申请日：2016-08-01

Applicant: Shinwa Controls Co., Ltd.

Inventor： Yosuke IKEDA ,  Hideaki FURUMOTO ,  Hirofumi KOMORI ,  Takuya ISHIMATSU

IPC: F24F11/84 ,  F24F11/89 ,  F24F11/49 ,  F24F11/72

CPC classification number: F24F11/84 ,  F24F11/49 ,  F24F11/72 ,  F24F11/89 ,  F24F2110/10 ,  F24F2110/20 ,  F24F2110/40 ,  F24F2140/10 ,  F24F2203/021

Abstract: An air conditioner includes: a cooling unit having a compressor operated at a variable operating frequency to adjust a revolving speed thereof, a condenser, an expansion valve and a cooling coil; and a heating unit for causing the heating medium flowing from the compressor toward the condenser to diverge, and to return to flow into the condenser, through a heating coil and a thermal dose adjusting valve disposed on the downstream side thereof; so as to control a temperature of air by the cooling and heating coils. When an opening manipulated variable of the thermal dose adjusting valve exceeds a first threshold value over a period of time, an operating frequency of the compressor is decreased, and when the opening manipulated variable of the thermal dose adjusting valve falls below a smaller, second threshold value, over the said period of time, the operating frequency of the compressor is increased.

公开(公告)号：US11874022B1

公开(公告)日：2024-01-16

申请号：US17472375

申请日：2021-09-10

Applicant: HAMFOP Technologies LLC

Inventor： Mudasir Ahmad

IPC: F24F5/00 ,  F24D11/02 ,  F24S10/95 ,  F24T10/10 ,  F25B23/00 ,  F24F140/10

CPC classification number: F24F5/0046 ,  F24D11/02 ,  F24F5/0035 ,  F24S10/95 ,  F24T10/10 ,  F25B23/00 ,  F24F2005/0064 ,  F24F2140/10

Abstract: A heat-activated fluid pump heats and cools a building. For cooling, an evaporator, coupled to a solar heater or comprising multi-pane windows with solar radiation-absorbent areas thermally coupled to a fluid cavity, converts a working fluid into a vapor. A pressure control valve allows vaporized working fluid into a liquid-piston chamber whenever a target pressure in the evaporator is exceeded. The working fluid expands, displacing liquid from the liquid-piston chamber in a pump stage where it enters a condenser situated in a vertical hole or covered horizontal trench in the ground. Ground-temperature pumped fluid returning to the liquid-piston chamber in a suction stage passes along the way through coils in rooms of the building. Check valves allow replenishment of the evaporator with return working fluid and direct flow of pumped fluid into and out of the liquid-piston chamber. For heating, the evaporator is in the ground.

公开(公告)号：US11874004B2

公开(公告)日：2024-01-16

申请号：US16978848

申请日：2019-03-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuyuki Kobayashi

IPC: F24F11/00 ,  F24F11/46 ,  F24F11/64 ,  F24F11/65 ,  F24F140/10

CPC classification number: F24F11/0001 ,  F24F11/46 ,  F24F11/64 ,  F24F11/65 ,  F24F2011/0002 ,  F24F2140/10

Abstract: A ventilation control device (2) includes a total exhaust air volume reader (16), an exhaust device specification reader (17), an exhaust air volume distributor (18), and an exhaust air volume instructor (19). The total exhaust air volume reader (16) reads the total exhaust air volume set to a building. The exhaust device specification reader (17) reads a maximum exhaust air volume of each of exhaust devices (3) as a specification of the exhaust device (3). The exhaust air volume distributor (18) sets the exhaust air volume of each exhaust device (3) by distributing the exhaust air volume read by the total exhaust air volume reader (16) according to the maximum exhaust air volume of the exhaust device (3) read by the exhaust device specification reader (17). The exhaust air volume instructor (19) instructs, to each exhaust device (3), the exhaust air volume set by the exhaust air volume distributor (18).

公开(公告)号：US11859848B2

公开(公告)日：2024-01-02

申请号：US17362466

申请日：2021-06-29

Applicant: Johnson Controls Tyco IP Holdings LLP

Inventor： Amit Chauhan

IPC: F24F11/65 ,  F24F11/64 ,  F24F3/02 ,  F24F140/10

CPC classification number: F24F11/65 ,  F24F3/02 ,  F24F11/64 ,  F24F2140/10

Abstract: An environmental control system for a building is shown. The system includes a control device operable affect a static pressure in a conduit, a building device operable to affect a flow rate of a fluid through the conduit, and a controller including a processing circuit configured to perform a volumetric control process to generate a control signal for the drive device. The processing circuit is further configured to receive an operating position signal of the control device. The processing circuit is further configured to determine an estimated static pressure level within the duct using the operating position signal of the control device and update the control signal based on the estimated static pressure level determined using the operating position. The processing circuit is further configured to operate the drive device based on the updated control signal to affect the flow rate of the fluid.

公开(公告)号：US20230296273A1

公开(公告)日：2023-09-21

申请号：US18086270

申请日：2022-12-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kwangsik HAN ,  Sangho YOO ,  Jaeyang LEE ,  Jejin LEE ,  Hyeongseok LIM ,  Byoungguk LIM ,  Yonghee JANG ,  Gwangchel JEONG ,  Dongil JUNG

IPC: F24F11/41 ,  F25B41/20 ,  F25B47/02

CPC classification number: F24F11/41 ,  F25B41/20 ,  F25B47/02 ,  F24F2140/10

Abstract: An air conditioner, and a method of controlling the air conditioner, including a compressor configured to compress a refrigerant, and including a discharge port; an outdoor heat exchanger configured to exchange heat with outside air, and including an upper portion including an upper inlet, and a lower portion including a lower inlet; a first four-way valve arranged between the discharge port of the compressor and the upper inlet; a second four-way valve arranged between the discharge port of the compressor and the lower inlet; and a controller electrically connected to the compressor, the first four-way valve and the second four-way valve. The controller may be configured to control the first four-way valve and the second four-way valve to perform a first defrosting operation which defrosts the upper portion and the lower portion during a heating operation, and control the first four-way valve and the second four-way valve to perform a second defrosting operation which operates the upper portion as an evaporator, and operates the lower portion as a condenser, based on a need for additional defrosting of the lower portion being detected.

公开(公告)号：US11680720B2

公开(公告)日：2023-06-20

申请号：US17652876

申请日：2022-02-28

Applicant: Trane International Inc.

Inventor： Rajasudhakar Subban ,  Rajat Subhra Raj

IPC: F24F11/00 ,  F24F13/08 ,  F24F13/10 ,  F24F3/044 ,  F24F13/16 ,  F24F11/56 ,  F24F120/20 ,  F24F110/30 ,  F24F140/10

CPC classification number: F24F11/0001 ,  F24F3/0442 ,  F24F13/08 ,  F24F13/10 ,  F24F13/16 ,  F24F11/56 ,  F24F2110/30 ,  F24F2120/20 ,  F24F2140/10 ,  F24F2221/14 ,  F24F2221/38

Abstract: A method for providing personalized comfort to occupants of an environmentally conditioned space includes sensing a pre-adjustment pressure within a variable air volume diffuser, remotely adjusting a position an individually-adjustable directional outlet of the variable air volume diffuser, sensing a post-adjustment pressure within the variable air volume diffuser, and modifying the airflow through the variable air volume diffuser such that the post-adjustment pressure is equal to the pre-adjustment pressure. The variable air volume diffuser includes individually-adjustable directional outlets and a controller configured to regulate air pressure within the variable air volume diffuser when an individually adjustable directional outlet is adjusted. A user device in operative communication with the variable air volume diffuser includes a user interface to remotely adjust an adjustable directional outlet of the variable air volume diffuser to provide personalized comfort for the user. In embodiments, the variable air volume diffuser responds to spoken commands.

公开(公告)号：US20180320920A1

公开(公告)日：2018-11-08

申请号：US15771653

申请日：2016-10-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahiro NAKATA ,  Junya YONEDA

IPC: F24F11/74 ,  F24F11/89 ,  F25B1/00

CPC classification number: F24F11/74 ,  F24F11/30 ,  F24F11/77 ,  F24F11/89 ,  F24F2140/10 ,  F24F2140/12 ,  F24F2221/34 ,  F25B1/00 ,  F25B2500/07 ,  F25B2600/027 ,  F25B2700/193

Abstract: An air conditioning apparatus is equipped with an indoor fan, an indoor heat exchanger, and a control unit. The indoor heat exchanger generates conditioned air by exchanging heat between refrigerant and room air. The control unit sets operating modes. The control unit controls the rotational speed of the indoor fan. More specifically, in a case where the operating mode has been switched from one to the other of a normal heating mode and a hot air mode in which the conditioned air higher in temperature than in the normal heating mode is generated, the control unit lowers the rotational speed at a second rate that is slower than a first rate which is a rate of decrease in the rotational speed in a case where the operating mode is set to the normal heating mode.