Premixing device and combustion device comprising same

A premixing device, comprising:

• a fan;
• a premixing device body part, connected to a discharge side of the fan, having formed therein a gas passage through which air flows by driving of the fan, and provided with a fuel gas outlet at a terminal end of a fuel gas supply path in a manner enabling fuel gas to flow into the gas passage and be mixed with the air;
• a pressure adjustment valve, provided in the fuel gas supply path and controlling a fuel gas supply pressure to a pressure corresponding to a signal pressure;
• a plurality of support parts, respectively provided to protrude from an inner peripheral wall part of the gas passage toward a central region of the gas passage, and arranged at intervals from each other in a circumferential direction of the gas passage;
• a pressure receiving part formation part, supported by the plurality of support parts and provided in the gas passage, comprising a pressure receiving part of a concave opening shape that receives air pressure at a position upstream in an air flow direction from the fuel gas outlet;
• a communication path, provided inside at least one of the plurality of support parts and communicating with the pressure receiving part;
• a signal pressure transmission path, configured to comprise the communication path, and transmitting, as the signal pressure, the air pressure received at the pressure receiving part, to the pressure adjustment valve;
• and
• a baffle part, provided at a portion downstream in the air flow direction from the pressure receiving part and capable of turning incoming air flow into swirl flow or turbulent flow.