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1. 发明申请

US20230127348A1 Inkjet Recording Apparatus and Method for Cleaning Inkjet Recording Apparatus 有权
公开(公告)号：US20230127348A1
公开(公告)日：2023-04-27
申请号：US17911340
申请日：2020-12-09
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Yusuke OKAMOTO , Takahiro ARIMA , Sho MIZOGUCHI , Akira MIYAO , Tatsuo MATSUMOTO
IPC分类号： B41J2/165
摘要： The present invention provides an inkjet recording device capable of automatically cleaning the head tip and a cleaning method for inkjet recording apparatus.
An inkjet recording apparatus has a printhead that receives a supply of ink and prints, a main unit that supplies said ink to said printhead, and a cleaning unit that has a cleaning tank into which said entire printhead is inserted and injects a cleaning solution from a cleaning nozzle to said printhead for cleaning. The cleaning unit has a cleaning nozzle that sprays cleaning liquid into the cleaning tank and a cleaning base section that has a housing section that accommodates the tip of the printhead and allows said cleaning liquid to flow into the housing section. The cleaning liquid is allowed to flow into the housing section to clean the tip of the printhead.

2. 发明授权

US11614084B2 Gas compressor 有权
公开(公告)号：US11614084B2
公开(公告)日：2023-03-28
申请号：US16496109
申请日：2018-01-30
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Ryusuke Oshiro
IPC分类号： F04B49/02 , F04C28/06 , F04C28/08 , F04C28/28 , F04B49/20
摘要： To prevent generation of drain reliably without depending on a difference in ambient temperature where a compressor is installed. Provided is a gas compressor: having a compressor main body compressing a gas, a drive source driving the compressor main body, a controller controlling the rotation speed of the drive source according to the discharge pressure of the compressor main body, and a temperature detector detecting the temperature of a discharge gas of the compressor main body; and performing no-load operation with the rotation speed of the drive source as a lower limit rotation speed when the discharge pressure reaches an upper limit pressure higher than a set pressure. When detecting that the temperature detected by the temperature detector is equal to or lower than a predetermined temperature during the no-load operation, the controller causes the lower limit rotation speed of the drive source to a lower limit rotation speed at which the temperature of the discharge gas is higher than the predetermined temperature and which is higher than a lower limit rotation speed when the detected temperature is higher than the predetermined temperature.

3. 发明申请

US20230072257A1 AIR PURIFYING NEGATIVE PRESSURE DEVICE 有权
公开(公告)号：US20230072257A1
公开(公告)日：2023-03-09
申请号：US17868271
申请日：2022-07-19
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Haruhiko ADACHI , Takeshi KANEKO
IPC分类号： F24F8/108 , F24F13/28
摘要： A housing configuration includes a filter chamber having a purifying filter, a rear chamber in the back, and a fan chamber having a fan. In this housing configuration, a measurement port for purifying filter performance evaluation is provided in a substantially middle portion of the rear chamber, and a connecting portion connected to the measurement port and a cover for maintenance work are provided on the front surface of the housing. Provided as a result is an air purifying negative pressure device that is compact in configuration, can be installed with ease, and is capable of improving both the accuracy of an air purifying filter performance evaluation test and the workability of routine maintenance.

4. 发明授权

US11585335B2 Gas compressor and method for controlling same 有权
公开(公告)号：US11585335B2
公开(公告)日：2023-02-21
申请号：US16977870
申请日：2019-07-26
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Norio Aoyagi , Akihiro Yamamoto , Yoshiyuki Kanemoto , Hiroaki Saito , Fuminori Kato , Daichi Oka
IPC分类号： F04B41/06 , F04B35/04 , F04B49/06 , F04D25/16 , F04D27/02 , F04B49/08 , F04B49/20 , F25B13/00 , F25B49/02 , F25B5/02 , F04C23/00 , F04C28/02 , F04C28/08 , F04D17/10 , F04C14/02
摘要： A gas compressor includes inverters, a plurality of compressor units and a control device for controlling each of the inverters. The control device increases the number of compressor bodies to be operated after confirming that the rotational speed of the operational motors will reach a steady value immediately after causing the number of the compressor bodies to be operated to increase.

5. 发明授权

US11543139B2 Safety cabinet 有权
公开(公告)号：US11543139B2
公开(公告)日：2023-01-03
申请号：US16955281
申请日：2019-02-04
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Takeshi Kaneko , Hirotoshi Sato , Masashi Takasawa
IPC分类号： F24F3/163 , F24F11/32 , F24F11/52 , B01L1/00 , C12M1/12 , C12M1/26 , F24F110/64
摘要： An object of the present invention is to provide a safety cabinet capable of controlling the purity during usage. In order to realize the object, the safety cabinet is configured to include an operation space including an operation stage; a front panel formed in a front surface of the operation space; an operation opening provided in a lower portion of the front panel; a suction port that is provided in the vicinity of the operation opening on a front side of the operation stage to lead downward; an air circulation path through which air suctioned from the suction port flows along a lower portion, a back surface, and an upper portion of the operation space; a particle counter; an operation space-air intake port provided in the operation space to take air into the particle counter; and an introduction pipe that introduces the air into the particle counter from the operation space-air intake port.

6. 发明申请

US20220403845A1 Liquid-Feeding Rotary-Screw Compressor 有权
公开(公告)号：US20220403845A1
公开(公告)日：2022-12-22
申请号：US17771715
申请日：2020-09-10
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Takeshi TSUCHIYA , Kotaro CHIBA , Masahiko TAKANO , Shigeyuki YORIKANE , Kenji MORITA
IPC分类号： F04C29/12 , F04C18/16
摘要： A delivery port of a rotary-screw compressor includes: a first opening having a profile configured to interrupt communication with a second working chamber of a suction process that opens only in the axial direction; a second opening connected to the first opening; and a third opening connected to the first opening and the second opening. The profile of the first opening includes: a first profile line that forms one of a pair of lateral edges of a lingulate protrusion configured to close off the second working chamber and extends toward a reference point; a second profile line that forms another one of the pair of the lateral edges of the protrusion; a third profile line that extends toward the reference point along the root circle of the female rotor; and a second connection line that connects the first profile line with the second profile line. The second opening is a first groove that opens into the first opening at the second connection line and extends toward a reference line. The third opening is a second groove that opens into the first groove and extends in an open state along the first profile line.

7. 发明授权

US11437944B2 Power conversion device 有权
公开(公告)号：US11437944B2
公开(公告)日：2022-09-06
申请号：US17254686
申请日：2019-05-29
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Kazuaki Tobari , Yoshitaka Iwaji , Agnes Hadinata , Yusaku Onuma , Takuya Sugimoto , Atsuhiko Nakamura , Hiroshi Watanabe , Yoshiyuki Taguchi
IPC分类号： H02P21/18 , H02P21/16 , H02P21/22 , H02P21/24 , H02M7/48 , H02P23/14
摘要： A power conversion device includes a harmonic voltage generation unit that superimposes dc-axis and qc-axis harmonic voltages on dc-axis and qc-axis voltage commands in accordance with a switching signal; and an inductance estimation unit that estimates dc-axis inductance and qc-axis inductance on a basis of dc-axis and qc-axis harmonic currents, amplitude values of the harmonic voltages, and the switching signal.

8. 发明申请

US20220250377A1 Inkjet Recording Device and Method for Controlling Inkjet Recording Device 有权
公开(公告)号：US20220250377A1
公开(公告)日：2022-08-11
申请号：US17597197
申请日：2020-05-19
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Takahiro ARIMA , Sho MIZOGUCHI , Akira MIYAO , Fumiormi UEDA , Mamoru OKANO
IPC分类号： B41J2/02 , B41J2/175 , B41J2/185 , B41J2/165 , B41J2/08
摘要： Provided is an inkjet recording device capable of facilitating cleaning of a print head, and easily recovering a solvent (cleaning liquid) that is used for cleaning.
An inkjet recording device includes a print head that receives a supply of ink to perform printing; and a main body that includes an ink container to contain the ink and a solvent container to contain a solvent, and that supplies the ink in the ink container to the print head. Further, the inkjet recording device includes a cleaning tank, a cleaning nozzle, and a recovery container. Then, the print head is set inside the cleaning tank, the solvent is sprayed from the cleaning nozzle to clean the print head, and the solvent after cleaning is recovered by the recovery container.

9. 发明申请

US20220212355A1 ISOLATOR AND METHOD FOR STERILIZING SAME 有权
公开(公告)号：US20220212355A1
公开(公告)日：2022-07-07
申请号：US17609869
申请日：2020-04-27
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： Takeshi KANEKO , Takeshi MATSUMURA
IPC分类号： B25J21/02 , A61L2/20 , A61L9/015
摘要： There is provided an isolator that is capable of improving work efficiency by shortening a sterilization time, and that is capable of securing a sterility assurance level. An isolator, in which a circulation fan above a work room supplies clean air to the work room via a HEPA filter, includes: the work room; a front door provided in a front surface of the work room; a glove provided in the front door; and an air supply unit that causes an air supply HEPA filter to clean air taken in from an air supply airtight damper, and that causes an air supply fan to supply the clean air into the isolator, when work is performed. When a sterilization gas is removed, the air supply unit is configured such that the air supply fan circulates the air inside the isolator through a sterilization gas-removing catalyst.

10. 发明授权

US11376848B2 Inkjet recording device and control method for inkjet recording device 有权
公开(公告)号：US11376848B2
公开(公告)日：2022-07-05
申请号：US17265643
申请日：2019-06-18
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： An Kyu , Takashi Kawano , Tsuneaki Takagishi , Manabu Kato
IPC分类号： B41J2/085 , B41J2/035
摘要： To realize high-quality printing with less printing distortion by reducing an influence of a Coulomb force that acts between ink particles which are ejected in an inkjet recording device.
The inkjet recording device is configured to charge ink particles ejected from a nozzle, deflect the charged ink particles, and print a character in a shape of an object to be printed. In the inkjet recording device, dots of each column of the character to be printed are divided into a plurality of blocks in a column direction. In addition, charging voltage data in which the order of the ink particles corresponding to the dots is switched in the divided block unit is stored, and a predetermined charging voltage is applied to the charging electrode on the basis of the charging voltage data.

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