Patent ID: 8584531

Claim:
An ultrasonic gas flow measurement device, comprising: a dumbbell-shaped tube including a central tube part, a first cone part, a first tube part, a second cone part and a second tube part, wherein the first tube part has a flow inlet for allowing a gas to flow into the dumbbell-shaped tube, the second tube part has a flow outlet for allowing the gas to flow out the dumbbell-shaped tube, and the central tube part connects to the first tube part through the first cone part and connects to the second tube part through the second cone part; a first ultrasonic transceiver disposed inside the first tube part for transmitting or receiving the ultrasonic signals, wherein at least one first flow channel is formed between the first ultrasonic transceiver and a tube wall of the first tube part; a second ultrasonic transceiver disposed inside the second tube part for transmitting or receiving the ultrasonic signals, wherein at least one second flow channel is formed between the second ultrasonic transceiver and a tube wall of the second tube part; a first cover part disposed outside the first tube part for preventing the gas from flowing out the dumbbell-shaped tube and for fixing the first ultrasonic transceiver inside the first tube part; a second cover part disposed outside the second tube part for preventing the gas from flowing out the dumbbell-shaped tube and for fixing the second ultrasonic transceiver inside the second tube part; a control unit connected to the first and second ultrasonic transceivers for performing a control, so as to transmit and receive the ultrasonic signals to and from the central tube part; and two silencer materials covering on inner surfaces of the first and second cone parts for preventing the ultrasonic signals from being influenced by echo.