Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Shigeru Iwanaga

Yasuhiro Umekage

Yukio Nagaoka

Yuji Nakabayashi

Hajime Miyata

Yoshinori Inui

Masahiko Hashimoto

Akihisa Adachi

Toshiharu Sato

Motoyuki Nawa

Tsuyoshi Inada

Keiji Ishikawa

Mitsuo Nanba

Noriyoshi Matoba

Norio Shinmura

A dish washer/dryer includes a washing tub for accommodating an object to be washed, a washing section for washing the object to be washed, a heater for heating washing water, an exhaust port for discharging moisture inside the washing tub, an air blower for blowing outside-air, a mixing section disposed at an upstream side of the exhaust port and mixing the outside-air with washing-tub-inside-air, and an air volume distribution section for changing the feeding ratio of outside-air into the washing tub and the mixing section. This configuration provides a dish washer/dryer, in which a sufficient amount of outside-air is mixed with exhaust air in the washing tub so as to promote the temperature reduction of the exhaust air and the reduction of the moisture content in the exhaust air during drying operation, thereby enhancing the comfort of the exhaust air.

Dish washer/dryer

An ultrasonic flow rate measuring device according to the present invention improves a measuring accuracy. An ultrasonic flow rate measuring device includes an ultrasonic measuring portion in which a first ultrasonic transmitter-receiver and a second ultrasonic transmitter-receiver are provided to a measurement passage, and first to fifth partitioning plates are set substantially in parallel with an ultrasonic wave propagation path that connects the first ultrasonic transmitter-receiver and the second ultrasonic transmitter-receiver, whereby first to sixth flat passages are laminated/formed in the measurement passage by the partitioning plates. In this ultrasonic flow rate measuring device, the first ultrasonic transmitter-receiver and the second ultrasonic transmitter-receiver are arranged such that the ultrasonic measuring portionmeasures the flow rate of the flat passage that is offset from the center along the lamination direction of the flat passages.

Ultrasonic flow rate measuring device

An ultrasonic fluid measurement instrument is capable of highly accurate fluid measurement. A measurement part is provided forming a plurality of split channels partitioned by partition boards halfway across a fluid channel, and at least a pair of ultrasonic transmitter-receivers for transmitting ultrasonic waves into the fluid flowing through the split channels and receiving ultrasonic waves that have passed through the fluid. Further, an arithmetic unit calculates the flow velocity and/or flow volume of the fluid according to the propagation time of the ultrasonic waves. The measurement part further includes an approach channel for preliminarily rectifying the fluid flowing to the split channels.

Ultrasonic fluid measurement instrument having a plurality of split channels formed by partition boards

Ultrasonic type fluid measurement device

An ultrasonic flow meter of the present invention includes: a measurement flow path through which a fluid to be measured flows; ultrasonic transducers and provided respectively on an upstream side and a downstream side with respect to each other along the measurement flow path ; an upstream aperture hole and a downstream aperture hole , the aperture holes and for exposing the ultrasonic transducers and to the measurement flow path ; a first influent suppressor provided in a vicinity of at least the downstream aperture hole for reducing inflow of the fluid to be measured into the aperture hole ; a second influent suppressor provided on an upstream side of the measurement flow path with respect to the aperture holes and for reducing the inflow of the fluid to be measured into the aperture holes and ; a measurement control section for measuring a propagation time of an ultrasonic wave between the ultrasonic transducers and ; and a calculation section for calculating a flow rate based on a signal from the measurement control section . The first influent suppressor provided for the downstream aperture hole comprises an aperture hole sealing section having at least one ultrasonically transmissive hole . Thus, it is possible to stabilize the flow between the ultrasonic transducers so as to enhance the ultrasonic reception level, thereby increasing the measurement precision and the upper limit value for the flow rate measurement, and to reduce the driving input for the ultrasonic transducers.

Ultrasonic flowmeter

A gas leakage detection system includes a flow path, a dual mode valve disposed in the flow path, an ultrasonic measuring section including a pair of ultrasonic transducers, disposed in the flow path upstream from the dual mode valve, a flow rate calculation section for computing a flow rate based on a signal from the ultrasonic measuring section, and a control section for controlling the dual mode valve. The control section closes or opens the dual mode valve instantaneously, and the flow rate calculation section computes a flow rate when the dual mode valve is closed. Thus, gas leakage can be decided substantially without stopping a gas flow when a user is using the gas.

Gas leak detection system

A flow meter includes a flow path through which a fluid flows; a pair of transceivers for sending and receiving an ultrasonic wave propagating across the flow path; and a flow calculation section for calculating a flow rate of the fluid flowing through the flow path based on a result of the ultrasonic wave being sent and received by the pair of transceivers. The flow path has an equal flow speed area in which the fluid flows at a substantially equal flow speed over an entire flow rate area ranging from a high flow rate area to a low flow rate area. The pair of transceivers send and receive the ultrasonic wave so that the ultrasonic wave propagates in the equal flow speed area.

Flow measuring device

An ultrasonic flowmeter includes a flow path defined by four wall sections, a flow measurement section, a calculation section and a pair of ultrasonic oscillators for transmitting and receiving an ultrasonic wave over a distance. The flow path is configured to reduce the influence of a phase difference, which results from the varying propagation distances of a direct wave and a reflected wave, by changing one or more of the flow measurement section configuration, the ultrasonic wave frequency, the orientation of the ultrasonic oscillators, and the distance between the pair of ultrasonic oscillators. A measurement section is suitably configured to measure the propagation time of the ultrasonic wave propagating between the pair of ultrasonic oscillators. Additionally, a calculation section is suitably configured to receive measurements from the measurement section and to calculate the fluid flow in the flow measurement section.

Growing community of inventors

Nara, Japan

Shigeru Iwanaga