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US6029466A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for evaporator temperature control as a function of the outside dew point

Assignee: Mercedes Benz Group AG
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Filing: 1998-07-06
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Granted: 2000-02-29
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Expires: 2018-07-06
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Abstract

Abstract A method for controlling the evaporator temperature of an air conditioner as a function of the outside dew point, in which the air temperature and the dew point temperature of the incoming air drawn in from outside by the air conditioner for air conditioning an interior are determined. An evaporator demand temperature without reheating is determined from the interior temperature setpoint information. On the one hand, the evaporator temperature is set to a setpoint that, within presettable temperature limits, is selected as the smaller value of the evaporator demand temperature. On the other hand, the evaporator temperature is set to a setpoint that, within presettable temperature limits, is the difference between the air temperature and the dew point temperature of the incoming air on the other. A typical use of the method, for example, is in the air conditioners of motor vehicles.

Inventors

  • 👤 Herbert Wieszt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 02:40
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/0008; B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3205; B60H1/3207

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 123 words
A method for controlling an evaporator temperature of an air conditioner as a function of the outside dew point, comprising the acts of: determining an air temperature (T A ) and a dew point temperature (T P ) of incoming air drawn in from outside by the air conditioner; determining an evaporator demand temperature (T VA ) without reheating from an interior temperature setpoint information; setting the evaporator temperature (T V ) to a setpoint (T VS ); and choosing the setpoint (T VS ) within presettable temperature limits as the smaller value of the evaporator demand temperature (T VA ) and the difference between the air temperature (T A ) and the dew point temperature (T P ) of the incoming air.
Claim 2
Independent Claim 123 words
A method for controlling an evaporator temperature of an air conditioner as a function of the outside dew point, comprising the acts of: determining an air temperature (T A ) and a dew point temperature (T P ) of incoming air drawn in from outside by the air conditioner; determining an evaporator demand temperature (T VA ) without reheating from an interior temperature setpoint information; setting the evaporator temperature (T V ) to a setpoint (T VS ); and choosing the setpoint (T VS ) within presettable temperature limits as the smaller value of the evaporator demand temperature (T VA ) and the difference between the air temperature (T A ) and the dew point temperature (T P ) of the incoming air.
Claim 3
Dependent Claim 30 words
The method according to claim 1, further comprising the act of: limiting an upper limit of the evaporator temperature setpoint (T VS ) to a presettable odor avoidance maximum temperature.
Claim 4
Dependent Claim 16 words
The method according to claim 1, wherein the air conditioner is a motor vehicle air conditioner.

References Cited (Backward Citations)

US4783970A Cited
DE3624171A1 Cited
DE3724430A1 Cited
US5467605A Cited
DE19517336A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2003-02-28 2003-08-30 2004-02-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2007-02-28 2007-08-30 2008-02-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2011-02-28 2011-08-30 2012-02-29 $7700.00 Window Closed / Lapsed

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