Warm or cold air channel with slots to optimize control curves

A heating and air conditioning device for a motor vehicle, comprising:

• a warm air path including a first warm air duct, the warm air path fluidly interconnecting an evaporator and at least one heat exchanger to a mixing chamber, the first warm air duct positioned at a first entrance to the mixing chamber;
• and
• a cold air path including a cold air duct, the cold air path fluidly interconnecting the evaporator and the mixing chamber, the cold air duct positioned at a second entrance to the mixing chamber, the first warm air duct and the cold air duct configured as an assembly including the first warm air duct penetrating the cold air duct to divide the cold air duct into a first partial cold air duct to a first side of the first warm air duct and a second partial cold air duct to a second side of the first warm air duct arranged opposite the first side of the first warm air duct, wherein a side wall of the first warm air duct faces toward the cold air path and a side wall of the cold air duct faces toward the warm air path, wherein the side wall of the first warm air duct is oriented along a plane perpendicular to a direction of cold air flowing through the cold air path and the side wall of the cold air duct is oriented along a plane perpendicular to a direction of warm air flowing through the warm air path, wherein an opening is formed in the side wall of the first warm air duct to allow a quantity of the cold air to flow from the cold air path into the first warm air duct and an opening is formed in the side wall of the cold air duct to allow a quantity of the warm air to flow from the warm air path into the cold air duct, the openings formed as one of horizontal rectangular slits, vertical slits, slits in triangular form, slits in trapezoidal form, round openings, and perforation patterns, wherein the cold air duct and the first warm air duct are defined by a structural part, and wherein the cold air duct is horizontally oriented with respect to the structural part and the first warm air duct is vertically oriented with respect to the structural part.

A heating and air conditioning device for a motor vehicle, comprising:

• a warm air path including a first warm air duct, the warm air path fluidly interconnecting an evaporator and at least one heat exchanger to a mixing chamber, the first warm air duct positioned at a first entrance to the mixing chamber;
• and
• a cold air path including a cold air duct, the cold air path fluidly interconnecting the evaporator and the mixing chamber, the cold air duct positioned at a second entrance to the mixing chamber, the first warm air duct and the cold air duct configured as an assembly and including the first warm air duct penetrating the cold air duct to divide the cold air duct into a first partial cold air duct to a first side of the first warm air duct and a second partial cold air duct to a second side of the first warm air duct arranged opposite the first side of the first warm air duct, wherein a side wall of the first warm air duct is oriented along a plane perpendicular to a direction of cold air flowing through the cold air path and a side wall of the cold air duct is oriented along a plane perpendicular to a direction of warm air flowing through the warm air path, wherein one or more openings are formed in at least one of the sidewall of the first warm air duct to allow a quantity of the cold air to flow from the cold air path into the first warm air duct or the sidewall of the cold air duct to allow a quantity of the warm air to flow from the warm air path into the cold air duct, the one or more openings formed as at least one of horizontal rectangular slits, vertical slits, slits in triangular form, slits in trapezoidal form, round openings, and perforation patterns, wherein the cold air duct and the first warm air duct are defined by a structural part, and wherein the cold air duct is horizontally oriented with respect to the structural part and the first warm air duct is vertically oriented with respect to the structural part.