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    • 2. 发明授权
    • Automatic defrost sensing arrangement for microwave oven
    • 微波炉自动除霜感应装置
    • US4507530A
    • 1985-03-26
    • US523178
    • 1983-08-15
    • Peter H. Smith
    • Peter H. Smith
    • H05B6/68H05B6/80H05B6/08
    • H05B6/725H05B6/6447H05B6/688
    • A system and method for defrost detection particularly applicable to a microwave oven having an excitation system which normally exhibits relatively little change in voltage standing wave ratio and phase for loads of widely varying dielectric constant values. A discontinuity is periodically introduced into the waveguide coupling microwave energy from the source to the cooking cavity. This discontinuity is effective to cause a substantial change in the magnitude and phase of the electromagnetic field in the waveguide for food objects in the frozen state, while causing relatively little change in these parameters for the same food objects in the thawed state. Hence, the presence of the discontinuity in the waveguide provides a readily detectable difference in field strength at the sensor location in the waveguide between an object in its frozen state and the same object in its thawed state. A sensor responsive to the strength of the electromagnetic field at a predetermined location in the waveguide generates an output signal representative of field strength at that location. This output signal is sampled with the discontinuity present in the waveguide to detect a predetermined relationship between the signal and a reference which when detected indicates the food load has converted from its frozen state to its thawed state.
    • 一种用于除霜检测的系统和方法,特别适用于具有激励系统的微波炉,所述激励系统对于介电常数值变化很大的负载的电压驻波比和相位通常相对较小。 周期性地引入从源到烹饪腔的波导耦合微波能量的不连续性。 这种不连续性对于在冷冻状态下的食品物体的波导中的电磁场的大小和相位的显着变化是有效的,同时在解冻状态下对相同食物的这些参数进行相对较小的变化。 因此,波导中的不连续性的存在提供了波导中处于其冻结状态的物体与其解冻状态中的相同物体之间的传感器位置处的场强的容易检测的差异。 响应于波导中预定位置处的电磁场强度的传感器产生代表该位置处的场强的输出信号。 该输出信号用波导中存在的不连续性进行采样,以检测信号和参考之间的预定关系,当检测到指示食物负载已经从其冻结状态转换到其解冻状态时。
    • 5. 发明授权
    • Food emission sensing
    • 食物排放感测
    • US4507529A
    • 1985-03-26
    • US508730
    • 1983-06-29
    • Peter H. SmithFred F. Holub
    • Peter H. SmithFred F. Holub
    • H05B6/80H05B6/64
    • H05B6/6405H05B6/6447H05B6/6473
    • A microwave oven having a cooking cavity for receiving objects to be heated during the oven cooking cycle arranged to permit continuous circulation of air through the cavity during the cooking cycle, an exhaust flow path to the oven exterior formed externally of the cavity for circulating air exiting the cavity, and sensing means responsive to vapors and/or gases carried by the exiting air positioned in the exhaust flow path, is provided with a pyrolytic converter positioned in the exhaust flow path upstream of the sensing means for converting non-gaseous contaminants carried by the exiting air during the cooking cycle to gaseous form. Removal of non-gaseous contaminants from the air exiting the cooking cavity upstream of the sensor prevents accumulation of such contaminants from interferring with proper sensor operation without interrupting the cooking cycle and without requiring periodic manual cleaning of the sensor device.
    • 一种微波炉,具有烹饪腔,用于在烤箱烹饪循环期间接收待加热物体,其布置成允许空气在烹饪周期期间连续循环通过空腔,在外部形成的烤箱外部的排气流动通道用于使空气流出 空腔和响应于位于排气流路中的排出空气携带的蒸气和/或气体的感测装置设置有热解转化器,其位于感测装置上游的排气流动路径中,用于转换非气态污染物 烹饪周期中的出口空气为气态。 从离开传感器传感器的空气中除去非气态污染物可以防止这种污染物在适当的传感器操作中受到干扰而不会中断烹饪周期而不需要定期手动清洁传感器设备。
    • 6. 发明授权
    • Weight measuring arrangement for cooking appliance surface unit
    • 烹饪器具表面单元的重量测量装置
    • US4476946A
    • 1984-10-16
    • US438764
    • 1982-11-03
    • Peter H. Smith
    • Peter H. Smith
    • G01G3/14G01G19/56G05D23/275G01G19/52G01G3/08G01G19/00
    • G01G3/1402G01G19/56G05D23/27543
    • A weight measuring arrangement for a cooking appliance in which a surface heating unit also functions as a scale platform. A three arm cantilever beam supports the heating unit. A set of four strain gages measures the strain of the three support arms, with one gage each being attached to each of two identical support arms and the remaining two gages being attached to the third arm, which arms are constructed such that the strain measured by each of the gages secured to the third arm is one-half that measured by each of the gages secured to the two identical arms when the ends of all three arms are equally deflected by a utensil placed on the surface unit for heating. The gages are electrically connected in a Wheatstone bridge network such that the output voltage from the bridge network is proportional to the weight of the load carried on the surface unit. This arrangement can be used to monitor the weight of the items being heated, throughout the heating period.
    • 一种用于烹饪器具的重量测量装置,其中表面加热单元也用作刻度台。 三臂悬臂梁支撑加热单元。 一组四个应变计测量三个支撑臂的应变,其中一个量规分别连接到两个相同的支撑臂中的每一个上,其余两个量规附接到第三臂,该臂被构造成使得通过 当所有三个臂的端部被放置在表面单元上用于加热的器具均等地偏转时,固定到第三臂的每个量规是由固定到两个相同臂的每个量规所测量的一半。 量规在惠斯通电桥网络中电连接,使得来自桥接网络的输出电压与承载在表面单元上的负载的重量成比例。 这种布置可以用于在整个加热期间监视被加热物品的重量。
    • 7. 发明授权
    • Combination microwave and thermal self-cleaning oven with an automatic
venting arrangement
    • 组合式微波炉和热自动烤箱,具有自动排气装置
    • US4547642A
    • 1985-10-15
    • US454972
    • 1983-01-03
    • Peter H. Smith
    • Peter H. Smith
    • F24C14/00F24C15/20H05B6/68H05B6/76H05B6/80H05B6/64
    • H05B6/725F24C14/00F24C15/2014H05B6/6405H05B6/6417H05B6/642H05B6/6458H05B6/6482H05B6/763
    • A domestic combination microwave and electric self-cleaning oven of the type providing a plurality of operating modes including a microwave mode and a self-cleaning mode is provided with an arrangement for preventing an undesirable buildup of humid air in the cavity when operating in the microwave modes. The venting arrangement includes a restricted air inlet passageway provided to allow outside air to enter the cavity. Air is vented from the cavity through an air exhaust passageway. A catalytic oxidation unit is provided in the air exhaust passageway to decompose gases generated when the oven is operating in the self-cleaning mode. The restricted air inlet passageway is configured to limit unaugmented air flow into the cavity to a level sufficient to facilitate the proper operation of the oxidation unit during operation in the self-cleaning mode. A humidity sensor for sensing the relative humidity of the air exiting the cavity through the exhaust passageway is provided in combination with a blower operative when energized to substantially augment the flow of air into the cavity and blower control circuitry responsive to the sensor and operative to energize the blower when the sensed relative humidity level exceeds a predetermined threshold level. The control circuitry enables energization of the blower only when operating in the microwave modes so that only the unaugmented air flow occurs in other operating modes.
    • 提供包括微波模式和自清洁模式的多种操作模式的家用组合式微波炉和电动自动清洁炉具有用于在微波炉中操作时防止空腔中不希望的积聚湿空气的装置 模式。 排气装置包括限定的空气入口通道,其设置成允许外部空气进入空腔。 空气通过排气通道从空腔排出。 在排气通道中设置催化氧化装置,以分解当烘箱在自清洁模式下运行时产生的气体。 限制的空气入口通道构造成将未被吸入的空气流限制到空腔中,以达到在自清洁模式下操作期间足以促进氧化单元正常操作的水平。 一个湿度传感器用于检测通过排气通道离开空腔的空气的相对湿度,并与一个鼓风机相结合,该鼓风机在通电时可以工作,从而基本上增加空气流入空腔,鼓风机控制电路响应于传感器, 当感测到的相对湿度水平超过预定阈值水平时,鼓风机。 控制电路仅在微波模式下工作时能使鼓风机通电,从而仅在其它操作模式下才发生未润湿的气流。
    • 8. 发明授权
    • Touch control arrangement for data entry
    • 触摸控制排列数据输入
    • US4495485A
    • 1985-01-22
    • US528075
    • 1983-08-31
    • Peter H. Smith
    • Peter H. Smith
    • G06F3/033G06F3/044H03K17/96H03M11/24G08C9/00
    • G06F3/044H03K17/9622H03M11/24H03K2017/9615
    • A touch control arrangement which employs a touch panel comprising a plurality of touch keys and a network of electrically connected capacitive elements; an oscillator which incorporates the network of capacitive elements in its timing circuit; and a microprocessor coupled to the output of the oscillator and operative to control various appliance operating components as determined by the frequency of the oscillator output signal. The keys of the touch panel are operatively coupled to the network of capacitive elements such that actuation of a key or pad by the user changes the equivalent capacitance of the timing circuit causing the oscillator a generate a control signal at the frequency associated with the actuated key.
    • 一种触摸控制装置,其采用包括多个触摸键的触摸面板和电连接的电容元件的网络; 在其定时电路中并入电容元件网络的振荡器; 以及耦合到所述振荡器的输出并且可操作以控制由所述振荡器输出信号的频率确定的各种器具操作部件的微处理器。 触摸面板的键可操作地耦合到电容元件的网络,使得用户对键或垫的操作改变定时电路的等效电容,使得振荡器产生与激活键相关联的频率的控制信号 。
    • 9. 发明授权
    • Microwave oven cavity excitation system providing controlled electric
field shape for uniformity of energy distribution
    • 微波炉腔激励系统提供受控电场形状,使能量分布均匀
    • US4324968A
    • 1982-04-13
    • US203091
    • 1980-11-03
    • Peter H. Smith
    • Peter H. Smith
    • H01P1/195H01P5/04H05B6/72H05B6/74
    • H01P5/04H01P1/195H05B6/72H05B6/74
    • A microwave oven cavity excitation system for promoting time-averaged uniformity of microwave energy distribution within the cooking cavity. Circularly-polarized microwave energy is radiated from a feed waveguide into an adjacent cooking cavity by means of an aperture, such as an X-slot, in the feed waveguide properly electrically located laterally within the feed waveguide so as to nominally radiate an electric field having circular polarization properties and, overall, shaped as an approximate hemisphere. A cross-sectional slice of the field, for example in the plane of the food supported on a conventionally-located shelf, is circular in shape. The radiating X-slot is controllably and selectively electrically moved laterally with respect to the waveguide centerline with the result that the sectional shape of the resulting field changes from circular to elliptical, with the degree and orientation of the ellipse depending upon the direction and degree of movement of the coupling aperture with respect to the waveguide centerline. The shape of the field is constantly varied through various elliptical configurations during operation, to provide the desired time-averaged uniformity of energy distribution through a suitably-programmed controller.
    • 微波炉腔激励系统,用于促进烹饪腔内微波能量分布的时间均匀性。 圆形极化的微波能量通过诸如X形槽的孔(例如X形槽)从进料波导辐射到相邻的烹饪腔中,该馈入波导适当地电定位在馈送波导内侧,以便标称地辐射具有 圆形极化性质,总体而言,形状为近似半球。 该领域的横截面切片,例如在支撑在常规定位的货架上的食物的平面中,是圆形的。 辐射X槽可相对于波导中心线被可控地和选择性地电移动,结果是所得场的截面形状从圆形变为椭圆形,其中椭圆的程度和取向取决于方向和程度 耦合孔相对于波导中心线的运动。 在操作期间,场的形状通过各种椭圆形配置不断变化,以通过适当编程的控制器提供期望的时间平均均匀度的能量分布。