[특허]Air-conditioning apparatus

MITSUBISHI ELECTRIC CORPORATION

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Air-conditioning apparatus

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-013/00 F25B-041/04 F25B-005/02 F24F-003/153 F24F-003/06 F25B-025/00
출원번호	US-0256982 (2009-04-01)
등록번호	US-9322562 (2016-04-26)
국제출원번호	PCT/JP2009/056793 (2009-04-01)
§371/§102 date	20110916 (20110916)
국제공개번호	WO2010/113296 (2010-10-07)
발명자 / 주소	Takayama, Keisuke Yamashita, Koji Morimoto, Hiroyuki Shimazu, Yusuke
출원인 / 주소	MITSUBISHI ELECTRIC CORPORATION
대리인 / 주소	Buchanan Ingersoll & Rooney PC
인용정보	피인용 횟수 : 0 인용 특허 : 9

초록
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Use side heat exchangers, an intermediate heat exchanger that heats a heat medium flowing to the use side heat exchangers, an intermediate heat exchanger that cools the heat medium flowing to the use side heat exchangers, three-way valves that switch between a flow path connecting the intermediate heat exchanger to the use side heat exchangers and a flow path connecting the intermediate heat exchanger to the use side heat exchangers, and three-way valves and bypasses that control the flow rate of the heat medium flowing into the use side heat exchangers are included. When at least one of the use side heat exchangers is switched from a stop state to an operation state or switched to another operation mode, the flow rate of the heat medium flowing into this use side heat exchanger is suppressed, and a change in air output temperature in the use side heat exchangers other than this use side heat exchanger is suppressed.

대표
청구항
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1. An air-conditioning apparatus comprising: a heat medium loop;a refrigerant loop;a plurality of use side heat exchangers connected to the heat medium loop;a first heat exchanger that exchanges heat between heat medium and the refrigerant to heat the heat medium;a second heat exchanger that exchanges heat between the heat medium and the refrigerant to cool the heat medium;each use side heat exchanger associated with: a respective heat medium flow path switching device including a valve that switches between a flow path connecting said first heat exchanger to the respective use side heat exchangers and a flow path connecting said second heat exchanger thereto alternatively;a respective heat medium flow rate adjusting unit including a first valve and a second valve, said heat medium flow rate adjusting unit configured to control the flow rate of the heat medium flowing into the respective use side heat exchanger;a respective first heat medium temperature sensor that detects a temperature of the heat medium flowing out of the respective use side heat exchanger;the apparatus further includes a controller configured to control the heat medium flow path switching devices and the heat medium flow rate adjusting units;the controller configured to perform an operation including the following steps: first, detect when one of the use-side heat exchangers has 1) switched from an inactive state to an active state or 2) has switched from cooling mode to heating mode, or from heating mode to cooling mode;second, accordingly control the respective use-side heat exchanger's heat medium flow path switching device;third, detect whether another use-side heat exchanger is engaged in the same active operation mode as the respective use-side heat exchanger; if the answer to the third step is NO, then the controller adjusts the respective second valve on the basis of air conditioning load to the respective use-side heat exchanger,if the answer to the third step is YES, then the controller is configured to perform an operation including the following steps: first, the controller sets the respective first valve to a predetermined opening degree;second, the controller opens the respective second valve;third, the controller receives a temperature measurement from the respective first heat medium temperature sensor, if the temperature is less than or equal to a first threshold temperature, then the controller closes the respective first valve by a predetermined amount in order to suppress a temperature change in the heat medium; andfourth, the controller adjusts the respective second valve on the basis of air conditioning load at the respective use-side heat exchanger. 2. The air-conditioning apparatus of claim 1, wherein said heat medium flow rate adjusting unit is provided at the upstream or downstream of each use side heat exchanger and controls flow rate of the heat medium of the use side heat exchanger individually. 3. The air-conditioning apparatus of claim 1, wherein said heat medium flow rate adjusting unit further comprises: a heat medium bypass pipe, one end thereof being connected to a heat medium inflow side of said use side heat exchangers, the other end thereof being connected to a heat medium outflow side of said use side heat exchangers,a second heat medium temperature sensor that detects a temperature of the heat medium flowing out of said heat medium bypass pipe. 4. The air-conditioning apparatus of claim 1, further comprising: a second heat medium temperature sensor that detects a temperature of the heat medium flowing into said use side heat exchangers, whereinsaid controller controls said heat medium flow rate adjusting unit such that the difference between the temperature detected by the second heat medium temperature sensor and the temperature detected by said first heat medium temperature sensor is made to be a predetermined temperature difference. 5. The air-conditioning apparatus of claim 1, wherein when part of said use side heat exchangers is switched from the stop state to the operation state or switched to another operation mode,the controller is further configured to pause a fan sending air to a respective use side heat exchanger for a predetermined time upon detecting that the respective use side heat exchanger has 1) switched from an inactive state to an active state or 2) has switched from cooling mode to heating mode, or from heating mode to cooling mode. 6. The air-conditioning apparatus of claim 5, wherein when a reduction of the flow rate of the heat medium flowing into said use side heat exchanger switched from the stop state to the operation state or switched to the other operation mode is completed,said fan is started even before the lapse of the predetermined time is terminated. 7. The air-conditioning apparatus of claim 1, further comprising a refrigeration cycle circuit including a compressor, a heat source side heat exchanger, at least one expansion device that adjusts a pressure of the refrigerant, said first heat exchanger, and said second heat exchanger, which are connected by piping, whereinby the refrigerant circulating in the refrigeration cycle circuit, the heat medium flowing through said first heat exchanger is heated and the heat medium flowing through said second heat exchanger is cooled. 8. The air-conditioning apparatus of claim 7, wherein the refrigerant circulating in said refrigeration cycle circuit is carbon dioxide. 9. The air-conditioning apparatus of claim 3, wherein said heat medium bypass pipe is arranged between each of said use side heat exchangers and said heat medium flow path switcher corresponding to the use side heat exchanger. 10. A method for controlling an air-conditioning apparatus that includes: a heat medium loop,a refrigerant loop,a plurality of use side heat exchangers connected to the heat medium loop,a first heat exchanger that exchanges heat between a heat medium and the refrigerant to heat the heat medium,a second heat exchanger that exchanges heat between the heat medium and the refrigerant to cool the heat medium,each use side heat exchanger associated with: a respective heat medium flow path switching device including a valve that switches between a flow path connecting said first heat exchanger to the respective use side heat exchangers and a flow path connecting said second heat exchanger thereto alternatively,a respective heat medium flow rate adjusting unit including a first valve and a second valve, said heat medium flow rate adjusting unit configured to control the flow rate of the heat medium flowing into the respective use side heat exchanger,a respective first heat medium temperature sensor that detects a temperature of the heat medium flowing out of the respective use side heat exchanger; the method comprising: controlling, with a controller, the heat medium flow path switching devices and the heat medium flow rate adjusting units; andperforming, with the controller, an operation including the following steps: first, detecting when one of the use-side heat exchangers has 1) switched from an inactive state to an active state or 2) has switched from cooling mode to heating mode, or from heating mode to cooling mode;second, accordingly controlling the respective use-side heat exchanger's heat medium flow path switching device;third, detecting whether another use-side heat exchanger is engaged in the same active operation mode as the respective use-side heat exchanger; if the answer to the third step is NO, adjusting, by the controller, the respective second valve on the basis of air conditioning load to the respective use-side heat exchanger, andif the answer to the third step is YES, performing an operation including the following steps: first, setting the respective first valve to a predetermined opening degree;second, opening the respective second valve;third, receiving a temperature measurement from the respective first heat medium temperature sensor, if the temperature is less than or equal to a first threshold temperature, then closing the respective first valve by a predetermined amount in order to suppress a temperature change in the heat medium; andfourth, adjusting the respective second valve on the basis of air conditioning load at the respective use-side heat exchanger.

이 특허에 인용된 특허 (9)

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특허 상세정보

Air-conditioning apparatus

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Air-conditioning apparatus

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