Indoor unit

Abstract

The utility model provides an indoor unit, which comprises a housing and is characterized in that a fan is fixedly arranged inside the housing; a heat exchanger is arranged at an air intake side of the fan; the housing is provided with an air return port and an air outlet respectively located at both sides of the heat exchanger; the air return port is formed in the rear side face or the upper side face of the housing, or the air return ports are formed in rear side face and the upper side face of the housing at the same time; the fan is a cross-flow fan, and a diffusion part of the cross-flow fan is arranged downwards; the cross-flow blower comprises a cross-flow wind wheel and a volute which are arranged in a mutual cooperative way, and the volute is cooperatively arranged inside the housing; the volute comprises a front volute forming a first side face of the diffusion part and a back volute forming a second side face of the diffusion part; the minimal clearance between the edge of the cross-flow wind wheel and the front volute is delta 1, wherein delta 1 is larger than or equal to 3mm and smaller than or equal to 13mm; and the minimum clearance between the edge of the cross-flow wind wheel and the back volute is delta 2, wherein delta 2 is larger than or equal to 3mm and smaller than or equal to 15mm. According to the utility model, the air outlet direction is directly downward, and the air noise ratio is improved.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an indoor unit. Background technique [0002] In terms of unit structure, the household small indoor units currently on the market (take the air duct indoor unit as an example) are as follows: Figure 1 to Figure 4 As shown, it mainly includes a housing 10, a heat exchanger 20 is fixed inside the housing 10, a water receiving tray 30 is provided below the heat exchanger 20, a fan 40 is provided on one side of the heat exchanger 20, and a fan 40 is provided on the housing 10. An air return port 11 and an air outlet 12 located on both sides of the heat exchanger 20 are provided. From the perspective of airflow organization, there are mainly the following forms: [0003] side send next time, such as figure 1 and figure 2 As shown, the air return port 11 of the indoor unit is designed at the lower part of the indoor unit, and the air outlet 12 of the indoor unit is designed at th...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide an indoor unit with downward airflow and improved wind-to-noise ratio, so as to solve the problems of poor heating comfort and relatively poor wind-to-noise ratio of indoor units

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