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51. 发明专利

JPH0436550A REFRIGERATOR 失效
公开(公告)号：JPH0436550A
公开(公告)日：1992-02-06
申请号：JP14181190
申请日：1990-05-30
申请人： DAIKIN IND LTD
发明人： GOTO NOZOMI , KATAOKA OSAMI
IPC分类号： F25B1/00
摘要： PURPOSE:To enable an operating range of a compressor to be expanded by a method wherein when a temperature of discharged gas is increased up to a predetermined temperature which is approximate to a setting temperature for stopping an operation of the compressor, a degree of opening of an electrical expansion valve is increased in such a way as the temperature becomes an over-heating temperature not exceeding the predetermined temperature. CONSTITUTION:An electrical expansion valve 6 is installed in the midway part of a liquid injection pipe 5. A temperature sensor 7 for sensing a discharged gas temperature and a pressure sensor 8 for sensing a discharged gas pressure are installed at a discharging side of a compressor 1. In turn, an over-heating degree of the discharged gas is calculated based on a result of sensing from each of the sensors 7 and 8, a command of degree of opening is outputted to the expansion valve 6 in such a way as the overheating degree of the discharged gas becomes a constant over-heating degree. When the discharged gas temperature becomes a predetermined temperature which is approximate to the set temperature for stopping the operation of the operation of the compressor 1, an overheating degree controller 9 for outputting an command of degree of opening for increasing a degree of opening of the electrical expansion valve 6 in such a way as the discharged gas temperature becomes the degree of overheating not exceeding the predetermined temperature is provided.

52. 发明专利

JP2019019682A スクリュー圧縮機审中-公开
公开(公告)号：JP2019019682A
公开(公告)日：2019-02-07
申请号：JP2017135944
申请日：2017-07-12
申请人： DAIKIN IND LTD
发明人： GOTO NOZOMI , MIYAMURA HARUNORI , FUJIWARA HIDEKI
IPC分类号： F04C18/16 , F04C18/52 , F04C29/00
摘要：【課題】スクリュー圧縮機において、軸受(66)を保持する軸受ホルダ(65)を有する端部ケーシング(12)を、駆動軸(21)を保持する本体ケーシング(11)に組み付けるときに、駆動軸(21)と軸受(66)を位置合わせすることで軸受(66)の損傷を抑制し、圧縮機の運転効率の低下や異音の発生を抑える。【解決手段】端部ケーシング(12)の軸受ホルダ(65)に保持された軸受(66)と、本体ケーシング(11)に保持された駆動軸(21)とを位置合わせするための組み付けガイド(80)として駆動軸側ガイド部(81)と軸受ホルダ側ガイド部(82)とを設ける。【選択図】図7

53. 发明专利

JP2019019678A スクリュー圧縮機审中-公开
公开(公告)号：JP2019019678A
公开(公告)日：2019-02-07
申请号：JP2017135660
申请日：2017-07-11
申请人： DAIKIN IND LTD
发明人： GOTO NOZOMI
IPC分类号： F04C29/12 , F04C18/52 , F04C29/02
摘要：【課題】吐出通路に油が残存することに起因して油溜まり部の油の量が不足してしまうことを回避する。【解決手段】吐出通路(70)と油溜まり部(19)とを仕切る仕切部(15a)には、油溜まり部(19)に溜まった油を圧縮室(35)に供給するための第1の油供給路(75)と、吐出通路(70)に溜まった油を圧縮室(35)に供給するための第2の油供給路(76)とが形成されている。切換機構(80)は、第1の油供給路(75)のみから各摺動部に油を供給可能な第1状態と、第2の油供給路(76)のみから各摺動部に油を供給可能な第2状態と、第1の油供給路(75)及び第2の油供給路(76)の両方から各摺動部に油を供給可能な第3状態とを切り換える。【選択図】図4

54. 发明专利

JP2002327690A TWO-STAGE COMPRESSOR 失效
公开(公告)号：JP2002327690A
公开(公告)日：2002-11-15
申请号：JP2001132527
申请日：2001-04-27
申请人： DAIKIN IND LTD
发明人： OTSUKA KANAME , GOTO NOZOMI
IPC分类号： F04C18/16 , F04B49/06 , F04C23/00 , F04C28/02 , F04C28/08 , F25B1/047 , F25B1/10 , F04C29/10
摘要： PROBLEM TO BE SOLVED: To provide a two-stage compressor with excellent efficiency in the partial load operation. SOLUTION: The two-stage compressor consisting of a low-stage compressor 1 and a high-stage compressor 3 connected with a connecting pipe 2 comprises a low pressure sensor 21 for detecting the intake pressure of the low-stage compressor 1, an intermediate pressure sensor 22 for detecting the intermediate pressure between the low-stage compressor 1 and the high-stage compressor 3, a high pressure sensor 23 for detecting the discharge pressure of the high- stage compressor 23, and a control part 6 for controlling an inverter 5 connected to a motor part of the high-stage compressor 3. The control part 6 controls the inverter 5 so that the intermediate pressure between the low-stage compressor 1 and the high-stage compressor 3 is the target pressure value calculated based on the values detected by the low pressure sensor 21 and the low pressure sensor 23.

55. 发明专利

JP2001289184A CAPACITY CONTROL MECHANISM OF SCREW COMPRESSOR 失效
公开(公告)号：JP2001289184A
公开(公告)日：2001-10-19
申请号：JP2000104907
申请日：2000-04-06
申请人： DAIKIN IND LTD
发明人： OTSUKA KANAME , GOTO NOZOMI
IPC分类号： F04C18/16 , F04B49/00 , F04C28/26 , F04C29/10
摘要： PROBLEM TO BE SOLVED: To provide the capacity control mechanism of a screw compressor capable of surely holding a slide valve even when the output of a drive motor is small and being controlled rapidly with high reliability without affecting the operating conditions. SOLUTION: When a pilot valve element 21 is moved rightward by an electric motor 50 through a link mechanism 55, an annular groove 33 in a control passage 31 communicates with an exhaust path 41 and a fluid pressure in a chamber 12 lowers. By this, a piston 5 moves in the direction of interrupting the communication between the control passage 31 and the discharge path 41, and stops when a driven force formed of a pressure difference in a slide valve 2 and the drive force of the piston produced by pressure differences in the cylinder chambers 12 and 13 are balanced with each other. Thus, since the piston 5 and, accordingly, the slide valve 2 follows up the pilot valve element 21, the axial position of the slide valve 2 is determined by the axial position of the pilot valve element 21.

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