Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Shizuka Yokote

Hiroshi Murakami

Yoshinari Asano

Yukio Honda

Michihiro Kurokawa

Hideo Hirose

Yasuaki Matsushita

Yukitoshi Wada

Koji Kuyama

Akira Yamaguchi

Takashi Ogawa

Masahito Hidaka

Masayuki Shinto

Naoyuki Kadoya

Hiroshi Ito

Yukihiro Okada

Hiroyasu Fujinaka

Hiroyuki Kayama

Kazushige Nakamura

Sho Koyama

Taku Uno

Takeshi Morishige

Keigo Matsumoto

A temperature conditioning unit includes a first temperature conditioning unit part, a second temperature conditioning unit part, and a blower (centrifugal blower). The first temperature conditioning unit part includes a first housing, a first air hole part, a first air chamber, a first object to be temperature-conditioned, and a second air chamber. The second temperature conditioning unit part includes a second housing, a second object to be temperature-conditioned, a second air hole part, and a third air chamber.

Temperature conditioning unit, temperature conditioning system, and vehicle

Temperature conditioning unit () includes impeller (), rotary drive source (), fan case (), housing (), intake-side back-end chamber (), intake-side front-end chamber (), and isolation wall (). Intake-side back-end chamber () adjoins an object to be temperature-conditioned. Intake-side front-end chamber () is where the air flows in from outside and flows out toward the intake-side back-end chamber. Isolation wall () separates intake-side back-end chamber () from intake-side front-end chamber ().

Temperature conditioning unit according to the present invention includes: impeller, electric motor, fan case, and housing. Impeller includes impeller disk and a plurality of rotor blades. The plurality of rotor blades extends in a direction along rotary shaft. Each of the plurality of rotor blades has a cross-sectional circular-arc shape, in a direction intersecting rotary shaft, which is a convex form curving outward toward a direction of rotation of impeller disk. Each of the plurality of rotor blades includes an inner-periphery-side edge located on the rotary shaft side, and an outer-periphery-side edge located on the opposite rotary-shaft side. Housing includes external surface on which fan case is mounted. In the inside of housing, a member to be temperature conditioned is accommodated.

Temperature conditioning unit, temperature conditioning system, and vehicle provided with temperature conditioning unit

Disclosed is an electric blower having a stator, a rotor, a bracket, a rotary fan, an air guide and a fan case. The air guide comprises a partition plate, a diffuser disposed around outer periphery of the rotary fan in the air guide, a partition-plate sloped portion and a guide vane. The fan case has a fan-facing portion, a fan case shoulder bent at the outermost part of the fan-facing portion, and a cylindrical portion extending cylindrically in an axial direction from the fan case shoulder. The fan case shoulder is so bent that it forms substantially a right angle.

Electric blower and vacuum cleaner comprising same

An electric blower includes a stator, a rotor, a bracket, rotary fan, air guide, a fan case covering air guide and rotary fan. Air guide includes a partition plate, a diffuser, a partition slope, and a guide vane. Diffuser vanes configure closed passages. Passage lengths of closed passages include a first passage length and a second passage length that is different from the first passage length.

Electric blower and electric cleaner with same

A side plate of an impeller is formed so that the height thereof is lowered gradually from an edge portion of a central opening portion toward a circumferential portion. When the distance from the edge portion of the central opening portion to the circumferential portion, in a direction perpendicular to the output shaft, is taken as L, the distance from the edge portion of the central opening portion to the circumferential portion, in the direction of the output shaft, is taken as H, a point on the side plate away from the edge portion of the central opening portion by 0.1&#xd7;L in the direction perpendicular to the output shaft is taken as P, and the distance from the edge portion of the central opening portion to the point P in the direction of the output shaft is taken as &#x394;H, &#x394;H/H&#x2267;0.4 is satisfied. With this configuration, the formation of a vortex flow in the flow channel inside the impeller from the air inlet to the air outlet is reduced, and, thus, air blowing efficiency is improved.

Electric fan

The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet () is hard to subjected to demagnetization magnetic field: 0.3 Lg&#x3c;La&#x2266;2.0 Lg, where La is a clearance between teeth of stator (), and Lg is an air-gap between stator () and rotor (). Outer walls of both ends of the permanent magnet () disposed within rotor () in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.

Permanent magnet synchronous motor including permanent magnet with tapered outer edges and rotor core with opening

Permanent magnet synchronous motor including permanent magnet with tapered outer edges

Permanent magnet synchronous motor

The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrating windings with the following structure so that permanent magnet () is hard to subjected to demagnetization magnetic field: 0.3 Lg&#x3c;La&#x2266;2.0 Lg, where La is a clearance between teeth of stator (), and Lg is an air-gap between stator () and rotor (), and yet outer walls of both ends of the permanent magnet () disposed within rotor () in a rim direction are tapered toward inside from a rotor rim in a radial direction and thus form recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.

In a conventional blowing apparatus, vibration is increased depending upon a combination of rotor magnetic poles, the number of stator salient poles and blades of a fan. In a blowing apparatus comprising a stator having a core including a M-number of salient poles, and a rotor having permanent magnets having a P-number of magnetic poles rotatably disposed such as to be opposed to magnetic pole surfaces of the stator, the stator and the rotor, in combination, forming a motor for rotating a fan having a N-number of blades, mN&ne;nM or mN&ne;nP is satisfied. With this feature, a synergism between vibration generated by cogging torque of the motor and vibration generated by rotation of the fan is moderated, and vibration and noise are reduced.

Blowing apparatus

A rotor magnet of a three-phase reluctance magnet motor is magnetized by coupling two of the three outer terminals (RS), and feeding a positioning current between the outer terminals RS and a third terminal (T) for positioning the rotor at a magnetizing position with reluctance torque. Then, rotor is kept from moving by holding the shaft of the rotor with the rotor positioned at the magnetized position. Next, the outer terminals RS are separated and magnetizing current is fed between the outer terminals R and S to magnetize the rotor magnet.

Magnetizing method for rotor magnet of reluctance magnet motor

In a motor having a permanent magnet built in a rotor, a hole for preventing a short-circuit of magnetic flux is disposed so that the hole is adjacent to the outer rim of rotor core, and adjoins to a slit for receiving a permanent magnet as well as the permanent magnet per se. This structure prevents a short-circuit of magnetic flux generated by both ends of the permanent magnet, and the magnetic flux at both ends of the magnet can flow to a stator, thereby contributing to generate torque effectively. As a result, the highly efficient motor with less cogging torque, less vibration and lower noise can be provided.

Growing community of inventors

Osaka, Japan

Shizuka Yokote