Analog to digital conversion by measuring the ratio of RC time constants
    51.
    发明授权
    Analog to digital conversion by measuring the ratio of RC time constants 失效
    通过测量RC时间常数的比例进行模数转换

    公开(公告)号:US4841458A

    公开(公告)日:1989-06-20

    申请号:US70727

    申请日:1987-07-07

    CPC classification number: G01K7/245 G01K1/028 G01R27/02

    Abstract: The present invention is a technique for forming a digital signal representing an environmental condition. The technique consists of measuring the variable time constant of an analog sensing device having a variable resistance dependent upon the environmental condition and a capacitor as well as measuring the reference time constant of a precision fixed resistor and the same capacitor. The time constants are measured by discharging the capacitor, charging the capacitor through the appropriate element and measuring the time for the voltage across the capacitor to reach a predetermined level. Lastly, the digital ratio between the two time constants is formed. This digital ratio is the digital representation of the environmental condition sensed by said analog sensing device.

    Abstract translation: 本发明是一种形成表示环境条件的数字信号的技术。 该技术包括根据环境条件和电容器测量具有可变电阻的模拟感测装置的可变时间常数以及测量精密固定电阻器和相同电容器的参考时间常数。 通过放电电容器来测量时间常数,通过适当的元件对电容器充电,并测量电容器两端的电压达到预定水平的时间。 最后,形成两个时间常数之间的数字比。 该数字比率是由所述模拟感测装置感测到的环境条件的数字表示。

    Thermostatic control without temperature droop using duty cycle control
    52.
    发明授权
    Thermostatic control without temperature droop using duty cycle control 失效
    恒温控制无温度下降使用占空比控制

    公开(公告)号:US4817705A

    公开(公告)日:1989-04-04

    申请号:US70725

    申请日:1987-07-07

    CPC classification number: F23N5/203

    Abstract: The present invention is a technique for thermostatic control of a temperature modifying apparatus such as a heating unit or an air conditioning unit. This technique involves measuring the ambient temperature, generating an error signal based upon the difference between a set point temperature and the measured ambient temperature, operating the temperature modifying apparatus according to the error signal, and adjusting the set point temperature based upon the time history of the error signal. In accordance with the preferred embodiment of the present invention, the temperature modifying apparatus is operated during the next cycle interval with a duty cycle proportional to the error signal at the start of the cycle interval. In the preferred embodiment the set point is adjusted via an adjustment quantity which is increased if the new duty cycle factor is greater than the previous duty cycle factor, decreased if the new duty cycle factor is less than the previous duty cycle factor and maintained unchanged if the new duty cycle factor equals the previous duty cycle factor, with the adjustment quantity maintained within a predetermined band.

    Thermostatic control without temperature droop using duty cycle control
    53.
    发明授权
    Thermostatic control without temperature droop using duty cycle control 失效
    恒温控制无温度下降使用占空比控制

    公开(公告)号:US4759498A

    公开(公告)日:1988-07-26

    申请号:US096963

    申请日:1987-09-15

    CPC classification number: F23N5/203 F25B2600/0251

    Abstract: The present invention is a technique for thermostatic control of a temperature modifying apparatus such as a heating unit or an air conditioning unit. This technique involves measuring the ambient temperature, generating an error signal based upon the difference between a set point temperature and the measured ambient temperature, operating the temperature modifying apparatus according to the error signal, and adjusting the set point temperature based upon the time history of the error signal. In accordance with the preferred embodiment of the present invention, the temperature modifying apparatus is operated during the next cycle interval with a duty cycle proportional to the error signal at the start of the cycle interval. In the preferred embodiment the set point is adjusted via an adjustment quantity which is increased if the difference between a desired temperature is of one sense decreased if the difference is of the opposite sense and maintained unchanged if the desired temperature equals the measured temperature, with the adjustment quantity maintained within a predetermined band.

    Abstract translation: 本发明是一种用于温度调节装置如加热单元或空调单元的恒温控制的技术。 该技术包括测量环境温度,基于设定点温度和测量的环境温度之间的差异产生误差信号,根据误差信号操作温度修正装置,以及基于时间历史来调整设定点温度 误差信号。 根据本发明的优选实施例,温度修正装置在下一个循环间隔期间以与循环间隔开始时的误差信号成比例的占空比工作。 在优选实施例中,通过调节量调整设定点,如果所需温度具有相反的意义,如果期望温度之间的差异降低,则调节量将增加,如果所需温度等于测量温度,则设定点保持不变, 调节量保持在预定频带内。

    De-icing thermostat for air conditioners
    55.
    发明授权
    De-icing thermostat for air conditioners 失效
    除冰空调恒温器

    公开(公告)号:US4627245A

    公开(公告)日:1986-12-09

    申请号:US699580

    申请日:1985-02-08

    CPC classification number: F25D21/006

    Abstract: An electronic de-icing thermostat adapted to be connected to an air-cooling apparatus, such as an air conditioner, to control its state of operation. The thermostat includes means for generating a digital electrical signal representative of a desired temperature setpoint, means for measuring the ambient temperature of the thermostat and means for generating control signals for deenergizing the compressor in the air-cooling apparatus for a first preselected period of time whenever the compressor is determined to have run continuously for a second preselected period of time in order to inhibit the accumulation of ice on the cooling element of the air-cooling apparatus. The device preferably includes means for adaptively adjusting the length of the second and/or first preselected periods of time as a function of the change in the rate of change of the ambient temperature measured during the operation of the air-cooling apparatus.

    Abstract translation: 一种电子除冰恒温器,适于连接到诸如空调的空气冷却装置,以控制其操作状态。 恒温器包括用于产生表示期望温度设定点的数字电信号的装置,用于测量恒温器的环境温度的装置和用于产生控制信号的装置,用于在空气冷却装置中的第一预选时间段内为压缩机断电, 压缩机被确定为连续运行第二预选时间段,以便抑制冰在空气冷却装置的冷却元件上的积聚。 该装置优选地包括用于根据在空气冷却装置的操作期间测量的环境温度的变化率的变化来自适应地调节第二和/或第一预选时间段的长度的装置。

    Programmable thermostat
    56.
    发明授权
    Programmable thermostat 失效
    可编程恒温器

    公开(公告)号:US4606401A

    公开(公告)日:1986-08-19

    申请号:US709918

    申请日:1985-03-08

    CPC classification number: G05B19/104 G05B2219/23199

    Abstract: A programmable thermostat employing means for sensing the ambient temperature on the thermostat, a clock for generating digital electrical signals representative of real time, a programmable digital memory for retaining a schedule of times and temperature ranges for a particular repetitive time cycle, display means for indicating selected information including programming mode, time, and temperature conditions during the programming and operation of the device, and control means for interrogating the current temperature range in the times-temperatures schedule, determining whether the ambient temperature on the thermostat is within that range, and generating a control signal to the furnace or air conditioner when appropriate.

    Abstract translation: 一种可编程恒温器,其采用用于感测恒温器上的环境温度的装置,用于产生代表实时数字电信号的时钟,用于保持特定重复时间周期的时间表和温度范围的可编程数字存储器,用于指示 选择的信息,包括在设备的编程和操作期间的编程模式,时间和温度条件,以及用于询问时间 - 温度调度中的当前温度范围的控制装置,确定恒温器上的环境温度是否在该范围内,以及 适当时向炉或空调机产生控制信号。

    Electronic thermostat with repetitive operation cycle
    57.
    发明授权
    Electronic thermostat with repetitive operation cycle 失效
    电子恒温器具有重复的运行周期

    公开(公告)号:US4531064A

    公开(公告)日:1985-07-23

    申请号:US579409

    申请日:1984-02-13

    CPC classification number: F23N5/203 G05D23/1904 G05D23/24 Y10T307/625

    Abstract: An electronic multiple-setback thermostat for residential and commercial use includes an internal clock having a week-long cycle. The thermostat is programmed by the operator, usually manually actuable input devices, to control the furnace/air conditioning system to achieve a schedule of temperatures over the weekly period by simply inputting the temperature desired to be attained at the time of entry. Each temperature entry may be programmed to reoccur on a daily basis or to modify the program on a once-a-week basis. The thermostat employs an internal clock which controls memory addresses so that each memory location is representative of a short time period during the weekly cycle. A desired temperature signal is entered in a memory location determined by the clock state at the time of entry and is read out to the control system each time that time state reoccurs. The external temperature sensor employs a thermistor controlled oscillator that is used as the system clock source during failures of the primary power source.

    Abstract translation: 用于住宅和商业用途的电子多重温控器包括具有一周周期的内部时钟。 恒温器由操作员(通常可手动致动的输入设备)编程,以通过简单地输入在进入时期望达到的温度来控制炉/空调系统以实现每周周期的温度表。 每个温度输入可以被编程为每天重复或者每周一次修改程序。 恒温器采用控制存储器地址的内部时钟,使得每个存储器位置代表每周周期中的短时间段。 期望的温度信号被输入到在输入时由时钟状态确定的存储器位置,并且每次该时间状态再次被读出到控制系统。 外部温度传感器采用热敏电阻控制振荡器,在主电源故障期间用作系统时钟源。

    Electronic thermostat with repetitive operation cycle
    58.
    发明授权
    Electronic thermostat with repetitive operation cycle 失效
    电子恒温器具有重复的运行周期

    公开(公告)号:US4469274A

    公开(公告)日:1984-09-04

    申请号:US350522

    申请日:1982-02-19

    CPC classification number: F23N5/203 G05D23/1904 G05D23/24

    Abstract: An electronic multiple-setback thermostat for residential and commercial use includes an internal clock having a week-long cycle. The thermostat is programmed by the operator, usually manually actuable input devices, to control the furnace/air conditioning system to achieve a schedule of temperatures over the weekly period by simply inputting the temperature desired to be attained at the time of entry. Each temperature entry may be programmed to reoccur on a daily basis or to modify the program on a once-a-week basis. The thermostat employs an internal clock which controls memory addresses so that each memory location is representative of a short time period during the weekly cycle. A desired temperature signal is entered in a memory location determined by the clock state at the time of entry and is read out to the control system each time that time state reoccurs.The external temperature sensor employs a thermistor controlled oscillator that is used as the system clock source during failures of the primary power source.

    Abstract translation: 用于住宅和商业用途的电子多重温控器包括具有一周周期的内部时钟。 恒温器由操作员(通常可手动致动的输入设备)编程,以通过简单地输入在进入时期望达到的温度来控制炉/空调系统以实现每周周期的温度调度。 每个温度输入可以被编程为每天重复或者每周一次修改程序。 恒温器采用控制存储器地址的内部时钟,使得每个存储器位置代表每周周期中的短时间段。 期望的温度信号被输入到由入口时钟状态确定的存储器位置中,并且每当该时间状态再次出现时被读出到控制系统。外部温度传感器采用用作系统的热敏电阻控制振荡器 主电源故障时的时钟源。

    Electronic thermostat with repetitive operation cycle

    公开(公告)号:US4335847A

    公开(公告)日:1982-06-22

    申请号:US153343

    申请日:1980-05-27

    Abstract: An electronic multiple-setback thermostat for residential and commercial use includes an internal clock having a week-long cycle. The thermostat is programmed by the operator, usually manually actuable input devices, to control the furnace/air conditioning system to achieve a schedule of temperatures over the weekly period by simply inputting the temperature desired to be attained at the time of entry. Each temperature entry may be programmed to reoccur on a daily basis or to modify the program on a once-a-week basis. The thermostat employs an internal clock which controls memory addresses so that each memory location is representative of a short time period during the weekly cycle. A desired temperature signal is entered in a memory location determined by the clock state at the time of entry and is read out to the control system each time that time state reoccurs. The external temperature sensor employs a thermistor controlled oscillator that is used as the system clock source during failures of the primary power source.

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