Novel efficient HVAC indoor unit

Abstract

The invention discloses a novel efficient HVAC indoor unit. The novel efficient HVAC indoor unit comprises a shell, a heat exchanger and a centrifugal fan. The heat exchanger and the centrifugal fan are arranged in a first cavity. A first air outlet is formed in a left side plate of the machine shell. A first air inlet is formed in a right side plate. The heat exchanger is in a V shape. The centrifugal fan comprises a volute, a wind wheel and a motor. The volute comprises a second air inlet and a second air outlet. The volute is located between an upper side plate and a lower side plate. The first air outlet communicates with the second air outlet. A volute tongue of the volute is connected with a static pressure return plate which is obliquely arranged. One end of the static pressure return plate is connected with a volute tongue of a volute air outlet, the other end of the static pressure return plate extends in the first air outlet direction, the centrifugal fan directly conducts blowing towards the first air outlet, the vortex phenomenon is effectively avoided, and efficiency is improved. Overall, if the same air volume is output, the current needed input power of the motor is lower than the original input power, more electric energy is saved, and cost is reduced.

Description

Technical field: [0001] The invention relates to a novel high-efficiency HVAC internal unit. Background technique: [0002] The existing HVAC internal unit includes a shell, a heat exchanger and a centrifugal fan, the shell is surrounded by an upper side plate, a lower side plate, a front side plate and a rear side plate to form a cavity, and the heat exchanger and the centrifugal fan are installed In cavity d, a left panel is provided on the left side of the cavity, a first air outlet is provided on the left panel, a first air inlet is provided on the right side of the cavity, the first air outlet, the first air inlet The tuyere and the cavity are connected, the heat exchanger is V-shaped, the heat exchanger is located on the left side of the first air inlet, the centrifugal fan is located on the right side of the first air outlet, and the centrifugal fan includes a volute, a wind Wheel and motor, the volute includes a second air inlet and a second air outlet, the second a...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned structure has the following technical problems: 1) Since there is a distance between the second air outlet and the first air outlet, when the second air outlet discharges wind to the first air outlet, the wind will appear a spiral phenomenon, resulting in the loss of air volume Too much will reduce the operating efficiency of the fan and increase the cost; 2) In addition, the distance between the second upper air inlet and the second lower air inlet of the volute and the upper side plate and the lower side plate is narrow, and the air intake of the volute is small, resulting in The exhaust air volume of the fan is reduced, and the operating efficiency of the fan is reduced; 3) The parameter ratio design of the volute and the cavity is unreasonable, which affects the efficiency of the fan and reduces the operating efficiency of the motor

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