Temperature control apparatus for an automobile air conditioner
First Claim
1. A temperature control apparatus for controlling air temperature in an air conditioner for an automobile including:
- a temperature setting circuit for generating a signal indicative of a temperature set by manual operation, said temperature setting circuit having a manual operating means for setting air temperature;
a temperature detecting circuit for generating a signal indicative of an actual air temperature in the air conditioner, said temperature detecting circuit being arranged so as to detect the air temperature;
a control amplifier for comparing the signal from said temperature setting circuit with the signal from said temperature detecting circuit and generating a signal according to the result of the comparison; and
an actuater for opening or closing an air mixing door, said actuater being operated according to the signal from said control amplifier, said air mixing door being arranged so as to control air temperature by adjusting the mixing ratio of a heated air flow rate with a cooled air flow rate,wherein an improvement is characterized in that said temperature setting circuit comprisestwo self-return type push button switches operating as said manual operating means, one of said switches for elevating and the other of said switches for lowering the set temperature,an up-down counter for counting signals from said switches and feeding out a digital signal, anda digital-analog converting circuit for carrying out a digital-analog conversion of the output of said up-down counter to generate a signal to be put into said control amplifier,said temperature control apparatus further comprises an indicator means for receiving said output of said up-down counter and digitally and visually displaying said set temperature.
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Accused Products
Abstract
Disclosed is a temperature control apparatus for an air conditioner of an automobile. This temperature control apparatus comprises a push button switch for elevating the set temperature and a push button switch for lowering the set temperature.
Every time the push button switch for elevating the set temperature is depressed, the set temperature can be elevated by, for example, 1° C. On the other hand, every time the push button switch for lowering the set temperature is depressed, the set temperature can be lowered by, for example, 1° C. Accordingly, the temperature can easily be set at an optional level by operating these switches appropriately. The so set temperature is digitally and visually displayed very clearly by a digital indicator.
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Citations
10 Claims
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1. A temperature control apparatus for controlling air temperature in an air conditioner for an automobile including:
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a temperature setting circuit for generating a signal indicative of a temperature set by manual operation, said temperature setting circuit having a manual operating means for setting air temperature; a temperature detecting circuit for generating a signal indicative of an actual air temperature in the air conditioner, said temperature detecting circuit being arranged so as to detect the air temperature; a control amplifier for comparing the signal from said temperature setting circuit with the signal from said temperature detecting circuit and generating a signal according to the result of the comparison; and an actuater for opening or closing an air mixing door, said actuater being operated according to the signal from said control amplifier, said air mixing door being arranged so as to control air temperature by adjusting the mixing ratio of a heated air flow rate with a cooled air flow rate, wherein an improvement is characterized in that said temperature setting circuit comprises two self-return type push button switches operating as said manual operating means, one of said switches for elevating and the other of said switches for lowering the set temperature, an up-down counter for counting signals from said switches and feeding out a digital signal, and a digital-analog converting circuit for carrying out a digital-analog conversion of the output of said up-down counter to generate a signal to be put into said control amplifier, said temperature control apparatus further comprises an indicator means for receiving said output of said up-down counter and digitally and visually displaying said set temperature. - View Dependent Claims (2, 3, 4, 5)
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6. A temperature control apparatus for controlling air temperature in an air conditioner for an automobile comprising:
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two self-return type push button switches operating as a manual operating means for setting air temperature, one of said switches for elevating and the other of said switches for lowering the set temperature; an up-down counter for counting signals from said switches and feeding out a digital signal; a digital-analog converting circuit for carrying out a digital-analog conversion of the output of said up-down counter to generate a signal indicative of said set temperature; a temperature detecting circuit for generating a signal indicative of an actual air temperature in the air conditioner, said temperature detecting circuit being arranged so as to detect the air temperature; a control amplifier for comparing the signal from said digital-analog converting circuit with the signal from said temperature detecting circuit and generating a signal according to the result of the comparison; an actuater for opening or closing an air mixing door, said actuater being operated according to the signal from said control amplifier, said air mixing door being arranged so as to control air temperature by adjusting the mixing ratio of a heated air flow rate with a cooled air flow rate; and an indicator means for receiving said output of said up-down counter and digitally and visually displaying said set temperature. - View Dependent Claims (7, 8, 9, 10)
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Specification