公开(公告)号：US20210116046A1

公开(公告)日：2021-04-22

申请号：US17110055

申请日：2020-12-02

Applicant: DENSO CORPORATION

Inventor： Shinji KAWADA ,  Seiji TATEISHI ,  Hikaru OTSUKA ,  Hiroto INOUE ,  Shin KUWATA ,  Tetsuya ITO ,  Shinji HASHIMOTO

IPC: F16K31/04 ,  F16K31/08 ,  F16K31/50 ,  F16K31/53 ,  F16H25/20 ,  H02K26/00 ,  H02K7/116 ,  H02K7/06

Abstract: A valve device includes a valve, a drive device, and a transmission unit. A valve changes a flow mode of refrigerant that flows in a circulation path of a refrigeration cycle device. The transmission unit includes a driving-side rotary body, a magnetic transmission member, and a driven-side rotary body. The driving-side rotary body includes multiple magnetic magnet poles in a rotational direction. The magnetic transmission member includes multiple magnetic transmission bodies which are configured to be magnetized by the magnetic magnet poles. The driven-side rotary body includes multiple magnetic magnet poles in a rotational direction. The driven-side rotary body rotates in response to a rotary motion of the multiple magnetic magnet poles of the driving-side rotary body via the magnetic transmission body. The number of the magnetic magnet poles and the number of the magnetic transmission bodies are different from each other. The rotation is transmitted from the driving-side rotary body to the driven-side rotary body via the magnetic transmission member in a non-contact manner.

公开(公告)号：US20210080022A1

公开(公告)日：2021-03-18

申请号：US17056056

申请日：2019-06-05

Applicant: DENSO CORPORATION

Inventor： Shinji KAWADA ,  Seiji TATEISHI ,  Hikaru OTSUKA ,  Hiroto INOUE ,  Shin KUWATA ,  Tetsuya ITO ,  Shinji HASHIMOTO

IPC: F16K31/04

Abstract: A valve device includes a valve, a driving device, and a transmission unit. The valve changes a circulation mode of refrigerant flowing through a circulation path of a refrigeration cycle system. The driving device drives the valve. The driving device includes a housing and an electric driving unit as a drive source. The transmission unit is arranged in a driving transmission path extending from the electric driving unit to the valve, and changes a speed of rotation generated by driving of the electric driving unit. The transmission unit is entirely or partially arranged in the housing that is partitioned from the circulation path in a liquid-tight manner.

公开(公告)号：US20250119047A1

公开(公告)日：2025-04-10

申请号：US18983205

申请日：2024-12-16

Applicant: DENSO CORPORATION

Inventor： Takafumi MATSUMOTO ,  Hiroto INOUE ,  Takuro SAHARA ,  Shinji HASHIMOTO ,  Satoshi MIYANO ,  Riku OUCHI ,  Shigeji OISHI ,  Hiroyuki KAWASHIMA ,  Tokuhisa TAKEUCHI

IPC: H02K49/10

Abstract: A power transmission device includes a magnetic gear with an input shaft magnet that receives rotational driving force, a magnetic modulator to modulate magnetic flux, a multi-pole magnet with more poles than the input shaft magnet, and an output shaft rotating with either the magnetic modulator or the multi-pole magnet. The device also features a magnetic circuit where the magnetic flux flows in parallel from the input shaft magnet. Between the input shaft magnet and the magnetic modulator is a flux-forming member with higher magnetic permeability than a vacuum, forming a short-circuiting flux path. The magnetic circuit creates two paths: a torque generation path, where magnetic flux flows through the magnetic modulator and multi-pole magnet, and a short-circuit flux path, where it bypasses the magnetic modulator. The flux-forming member's magnetic permeability is within ±20% of the value that maximizes torque.

公开(公告)号：US20210086588A1

公开(公告)日：2021-03-25

申请号：US17110584

申请日：2020-12-03

Applicant: DENSO CORPORATION

Inventor： Shinji KAWADA ,  Seiji TATEISHI ,  Hikaru OTSUKA ,  Hiroto INOUE ,  Shin KUWATA ,  Tetsuya ITO ,  Shinji HASHIMOTO

IPC: B60H1/32 ,  F16H25/20 ,  F16H49/00 ,  F16K27/00 ,  F16K31/04 ,  F16K31/44 ,  F25B41/06

Abstract: A valve device includes a valve that changes a flow state of refrigerant flowing in a circulation path of a refrigeration cycle device, and a drive device that drives the valve. The drive device includes an electric drive unit that drives the valve, a circuit board having a control circuit that controls a drive of the electric drive unit, and a detector that detects a state of the refrigerant. The electric drive unit, the circuit board and the detector are housed in a housing. The electric drive unit, the circuit board, and the detection body are electrically connected to each other inside the housing.

公开(公告)号：US20250116347A1

公开(公告)日：2025-04-10

申请号：US18983052

申请日：2024-12-16

Applicant: DENSO CORPORATION

Inventor： Takafumi MATSUMOTO ,  Hiroto INOUE ,  Takuro SAHARA ,  Shinji HASHIMOTO ,  Satoshi MIYANO ,  Riku OUCHI ,  Hiroyuki KAWASHIMA ,  Shigeji OISHI

IPC: F16K31/04 ,  H02P29/40

Abstract: A motor-operated valve includes a motor, valve seat, valve body, magnetic gear, and controller. The motor generates rotational force when powered, allowing the valve body to open and close the valve port, which permits fluid passage. The magnetic gear transmits this force from the motor to the valve body. The controller regulates the electric current supplied to the motor. During fully-closed operation, the controller limits the current to less than a fully-closed current limit value, ensuring the valve port is completely closed. This limit value is higher than the adjusting current value, which is the current supplied during valve opening adjustments.

公开(公告)号：US20230344304A1

公开(公告)日：2023-10-26

申请号：US18333399

申请日：2023-06-12

Applicant: DENSO CORPORATION

Inventor： Takafumi MATSUMOTO ,  Hiroto INOUE ,  Takuro SAHARA ,  Shinji HASHIMOTO ,  Ryu FUKUSHIMA ,  Ryotaro SUZUKI ,  Riku OUCHI ,  Shinji KAWADA ,  Toshihisa NAKAJIMA ,  Seiichiro WASHINO

IPC: H02K7/10 ,  H02K49/00 ,  F04D25/02 ,  B60H1/32

CPC classification number: H02K7/10 ,  H02K49/00 ,  F04D25/026 ,  B60H1/3204 ,  B60H2001/3286

Abstract: A power transmission device includes: a pole piece configured to rotate by modulating a magnetic flux between a drive-side magnet and a stationary magnet; and a sealing member that partitions an inside of a housing into a driving side space where the drive-side magnet is disposed and a driven side space where the stationary magnet and the pole piece are disposed, so as to seal fluid between the driving side space and the driven side space. The pole piece and the stationary magnet have a cylindrical shape and are disposed coaxially with and radially outer side of the drive-side magnet. The sealing member includes: a sealing cylinder portion positioned radially outer side of the drive-side magnet; and a sealing bottom surface portion covering the sealing cylinder portion from the driving side space.

公开(公告)号：US20210102635A1

公开(公告)日：2021-04-08

申请号：US17110119

申请日：2020-12-02

Applicant: DENSO CORPORATION

Inventor： Shinji KAWADA ,  Seiji TATEISHI ,  Hikaru OTSUKA ,  Hiroto INOUE ,  Shin KUWATA ,  Tetsuya ITO ,  Shinji HASHIMOTO

IPC: F16K31/04 ,  B60H1/32 ,  F16K31/08 ,  F16K31/53 ,  F16H25/20

Abstract: A valve device includes a valve, a drive device, a magnet coupling, and a screw mechanism. The valve includes a valve body and changes a flow mode of refrigerant flowing in a circulation path of a refrigeration cycle device. The drive device includes an electric drive unit as a drive source. The magnet coupling includes a driving-side rotary body and a driven-side rotary body that are magnetically connected to each other in a non-contact manner and transmits a rotary motion of the electric drive unit from the driving-side rotary body to the driven-side rotary body. The screw mechanism converts the rotary motion of the driven-side rotary body into an axial linear motion of the valve body. The valve device is configured to change the flow mode of refrigerant by using the linear motion of the valve body caused via the magnet coupling and the screw mechanism in response to the drive of the electric drive unit.