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Automobile air conditioner

  • US 4,513,808 A
  • Filed: 01/28/1982
  • Issued: 04/30/1985
  • Est. Priority Date: 02/04/1981
  • Status: Expired due to Term
First Claim
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1. An automobile air conditioner in which a warm air heated by a heater core and a cold air by-passing said heater core are mixed at a controlled ratio to provide conditioned chilled air and conditioned warm air, the conditioned chilled air being discharged to an upper part of a passenger compartment through an upper air outlet while the conditioned warm air is discharged to a lower part of the compartment through a lower air outlet, comprising:

  • a main chilled air passage means and a sub-chilled air passage means for by-passing said heater core;

    an evaporator upstream of both of said main chilled air passage means and said sub-chilled air passage means;

    a main warm air passage means and a sub-warm air passage means for distributing warm air coming out of said heater core at a suitable ratio;

    a first duct means for mixing chilled air from said main chilled air passage means and the warm air from said sub-warm air passage means, said first duct means being adapted to introduce the mixture to said upper air outlet;

    a second duct means for mixing the chilled air from said sub-chilled air passage means and the warm air from said main warm air passage means, said second duct means being adapted to introduce the mixture to said lower air outlet;

    a first air mix door for controlling the ratio between the flow rate of chilled air introduced into said heater core and the flow rate of chilled air flowing into said main chilled air passage means, said first air mix door being on the inlet side of the heater core and disposed at a branching point of the main chilled air passage means and a passage for air flowing into the heater core and reciprocally controlling an opening area of the main chilled air passage means and an opening area for the heater core from zero to maximum; and

    a second air mix door for controlling the ratio of mixing of the chilled air flowing from said sub-chilled air passage means into said second duct means and the warm air flowing from said main warm air passage means into said second duct means, said second air mix door being on the outlet side of the heater core and disposed at a meeting point of the main warm air passage means and the sub-chilled air passage means and reciprocally controlling an opening area of the main warm air passage means and an opening area of the sub-chilled air passage means from zero to maximum.

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