Patent application number | Description | Published |
20130174577 | Heating and Cooling Unit with Semiconductor Device and Heat Pipe - Aspects of the invention support the changing of a serving surface temperature in order to cool or heat the serving surface. Heat is transferred to or from the serving surface through at least one Peltier device, a heat pipe, and a heat sink. The mode of operation is determined by changing the electrical power polarity to the at least one Peltier device. A control device may activate the at least one Peltier device from a measured temperature and a temperature setting with a hysteresis. A plurality of Peltier devices may be partitioned into different subsets so that the control device may activate a selected subset during different time intervals. When the measured temperature is outside a temperature range, all of the Peltier devices may be activated, while only a selected subset may be activated when the measured temperature is within the temperature range and until a hysteresis temperature is reached. | 07-11-2013 |
20130174578 | Heating and Cooling Unit with Semiconductor Device and Heat Pipe - Aspects of the invention support simultaneous operation of a cooling side and a heating side of an apparatus to change the temperatures of a cooling serving surface and a heating serving surface, respectively. A cooling semiconductor device (which may comprise one or more Peltier devices) transfers heat from its top to its bottom while a heating semiconductor device (which may similarly comprise one or more Peltier devices) transfers heat from its bottom to its top. A heat pipe transfers waste heat from the cooling semiconductor device's bottom to the heating semiconductor device's bottom and waste cold from the heating semiconductor device's bottom to the cooling semiconductor device's bottom. | 07-11-2013 |
20140366559 | Heating and Cooling Unit with Semiconductor Device and Heat Pipe - Aspects of the invention support simultaneous operation of a cooling side and a heating side of an apparatus to change the temperatures of a cooling serving surface and a heating serving surface, respectively. A cooling semiconductor device (which may comprise one or more Peltier devices) transfers heat from its top to its bottom while a heating semiconductor device (which may similarly comprise one or more Peltier devices) transfers heat from its bottom to its top. A heat pipe transfers waste heat from the cooling semiconductor device's bottom to the heating semiconductor device's bottom and waste cold from the heating semiconductor device's bottom to the cooling semiconductor device's bottom. | 12-18-2014 |