公开(公告)号：US20240219049A1

公开(公告)日：2024-07-04

申请号：US17920086

申请日：2021-04-21

Applicant: Hitachi, Ltd.

Inventor： Hiroyuki TOYODA ,  Hiroshi MAITA ,  Shoichi TAGUCHI ,  Daisuke AKIMARU ,  Akinori KAWASAKI

IPC: F24F8/22 ,  A61L9/20

CPC classification number: F24F8/22 ,  A61L9/20

Abstract: Provided is an air sterilizer capable of efficiently irradiating dust, bacteria, viruses, and the like in circulating air with ultraviolet rays while preventing an increase in a blowing resistance, and an air conditioning apparatus using the air sterilizer.
An air sterilizer includes a frame of which air passes through an inside; an ultraviolet ray light source configured to emit ultraviolet light having a predetermined divergence angle; and a mirror surface configured to reflect the ultraviolet light and emit the ultraviolet light toward the air passing through the inside of the frame. A thickness of the frame in a direction in which the air passes is smaller than a diameter of a circle tangent to an inner circumference of the frame. When the ultraviolet light emitted from the ultraviolet ray light source is reflected by the mirror surface, the reflected light has a divergence angle or a convergence angle smaller than the divergence angle at least in a thickness direction of the frame.

公开(公告)号：US20230150553A1

公开(公告)日：2023-05-18

申请号：US17640496

申请日：2021-01-22

Applicant: HITACHI, LTD.

Inventor： Hiroshi MAITA ,  Hiroyuki TOYODA ,  Shoichi TAGUCHI ,  Akinori KAWASAKI ,  Tomoaki TAGUCHI ,  Daisuke AKIMARU

IPC: B61D27/00

CPC classification number: B61D27/0018

Abstract: Provided is an air conditioning system for a railway vehicle that is of a roof installation type. The air conditioning system includes a heat exchanger through which at least air inside the railway vehicle passes, and an ultraviolet-ray irradiation device. The heat exchanger and the ultraviolet-ray irradiation device are arranged between an upper cover curved in an upwardly protruding shape and a bottom plate. The heat exchanger has an air suction surface arranged so as to be irradiated with ultraviolet rays generated by the ultraviolet-ray irradiation device. A member that does not transmit the ultraviolet rays is arranged on a straight line interconnecting the ultraviolet-ray irradiation device and an interior space of the railway vehicle.

公开(公告)号：US20250146717A1

公开(公告)日：2025-05-08

申请号：US18897074

申请日：2024-09-26

Applicant: Hitachi, Ltd.

Inventor： Hironobu KAWAMURA ,  Sachio SEKIYA ,  Hiroshi MAITA ,  Mari UCHIDA

IPC: F25B40/06 ,  F25B30/02

Abstract: A steam compression device (gas compression device) includes: a second gas-liquid separator (gas-liquid separator) that evaporates water to generate water vapor and separates the water vapor from the water; an exhaust heat recovery heat exchanger (heat recovery unit) that supplies the water heated by hot water to the second gas-liquid separator (gas-liquid separator); a compressor that compresses the water vapor supplied from the second gas-liquid separator (gas-liquid separator); and a superheater that heats the water vapor by heat exchange between the hot water supplied to the exhaust heat recovery heat exchanger (heat recovery unit) and the water vapor supplied from the second gas-liquid separator (gas-liquid separator) to the compressor, in which the hot water flows through the superheater and the exhaust heat recovery heat exchanger in this order.

公开(公告)号：US20240010051A1

公开(公告)日：2024-01-11

申请号：US17921370

申请日：2021-06-24

Applicant: HITACHI, LTD.

Inventor： Hiroshi MAITA ,  Hiroyuki TOYODA ,  Daisuke AKIMARU ,  Akinori KAWASAKI ,  Tomoaki TAGUCHI ,  Fumio FUJII

IPC: B60H3/00 ,  B61D27/00

CPC classification number: B60H3/0092 ,  B61D27/0072

Abstract: An object of the present invention is to provide an air conditioner for a rail vehicle that is excellent in cleanliness and comfort by cleaning the air conditioner at an appropriate timing without causing discomfort to passengers. An air conditioner for a rail vehicle including a vehicle control system includes: a refrigeration cycle device 3 that can execute a cleaning operation; and an air conditioning control device 4 that controls the refrigeration cycle device, and the air conditioning control device 4 can communicate with the vehicle control system 2 and causes the refrigeration cycle device 3 to execute a cleaning operation on the basis of status information obtained from the vehicle control system 2.