Abstract: An air conditioning system includes a control unit, a circulation system, an AC-to-DC conversion unit, and a fan module. The control unit detects an area temperature, controls the compressor unit being in operation or not in operation according to the area temperature and a setting temperature set by the control unit, and control a rotation speed of the condensing fan according to a temperature difference between the area temperature and the setting temperature. When the area temperature is greater than the setting temperature, the control unit controls the compressor unit being in operation and control the condensing fan being in full-speed operation.

Abstract: A heating apparatus with automatic switching heaters includes a control module, a switch module, and a heating module. The control module receives an input power source. The switch module is connected to the control module. The heating module is connected to the switch module. When the control module detects that an amplitude of the input power source is larger than a threshold voltage value, the control module turns on a first switch assembly and turns off a second switch assembly of the switch module so that the heating module operates in a first heating mode. When the control module detects that the amplitude of the input power source is less than the threshold voltage value, the control module turns on the first switch assembly and the second switch assembly of the switch module so that the heating module operates in a second heating mode.

Abstract: An air conditioning system includes a control unit, a circulation system, an AC-to-DC conversion unit, and a fan module. The control unit detects an area temperature, controls the compressor unit being in operation or not in operation according to the area temperature and a setting temperature set by the control unit, and control a rotation speed of the condensing fan according to a temperature difference between the area temperature and the setting temperature. When the area temperature is greater than the setting temperature, the control unit controls the compressor unit being in operation and control the condensing fan being in full-speed operation.

Abstract: A heat exchange device includes a housing, a heat exchange module, and a piezoelectric module. Isolated inner and outer circulation chambers are formed in the housing. The heat exchange module in the housing includes a stack of separated plates parallel to each other. An inner channel communicated with the inner circulation chamber and an outer channel communicated with the outer circulation chamber are defined respectively by both sides of one of the plates and the other adjacent plates. The piezoelectric module in the housing includes a piezoelectric chip, and first and second heat exchange sides thermally coupled to the piezoelectric chip. The first heat exchange side is located in the inner circulation chamber and the second heat exchange side is located in the outer circulation chamber, so that heat can be transferred between the inner and outer circulation chambers via the piezoelectric chip.

Abstract: A shelf thermostat device and a thermostat system. The shelf thermostat device includes a fixing bracket and a heat exchanger. An electronic device is detachably disposed at the fixing bracket. The heat exchanger is detachably disposed at the fixing bracket and layer arranged in a row with the electronic device. The heat exchanger has a heat exchanging core. The heat exchanging core has a first side and a second side opposite to the first side, and a plurality of internal channels and a plurality of external channels. The internal channels and the external channels are disposed staggered and isolated with each other. An internal air flows between the internal channels and the electronic device. An external air flows to the second side of the heat exchanging core from the first side of the heat exchanging core through the external channels.

Abstract: A heating apparatus with automatic switching heaters includes a control module, a switch module, and a heating module. The control module receives an input power source. The switch module is connected to the control module. The heating module is connected to the switch module. When the control module detects that an amplitude of the input power source is larger than a threshold voltage value, the control module turns on a first switch assembly and turns off a second switch assembly of the switch module so that the heating module operates in a first heating mode. When the control module detects that the amplitude of the input power source is less than the threshold voltage value, the control module turns on the first switch assembly and the second switch assembly of the switch module so that the heating module operates in a second heating mode.

Abstract: A thermoelectric cooling module includes a first circuit board, a second circuit board, first conducting members, second conducting members and TED chips. The first circuit board includes first circuit regions, each having a first conducting layer and first penetrating holes; the second circuit board includes second circuit regions, each having a second conducting layer and second penetrating holes; each first conducting member is passed and fixed into each respective first penetrating hole; each second conducting member is passed and fixed into each respective second penetrating hole; each TED chip is clamped between the first circuit board and the second circuit board, and each first conducting member has an end attached to the TED chip and the other end attached to the first conducting layer, and each second conducting member has an end attached to the TED chip and the other end attached to the second conducting layer.

Abstract: A shelf thermostat device and a thermostat system. The shelf thermostat device includes a fixing bracket and a heat exchanger. An electronic device is detachably disposed at the fixing bracket. The heat exchanger is detachably disposed at the fixing bracket and layer arranged in a row with the electronic device. The heat exchanger has a heat exchanging core. The heat exchanging core has a first side and a second side opposite to the first side, and a plurality of internal channels and a plurality of external channels. The internal channels and the external channels are disposed staggered and isolated with each other. An internal air flows between the internal channels and the electronic device. An external air flows to the second side of the heat exchanging core from the first side of the heat exchanging core through the external channels.

Abstract: A thermoelectric cooling module includes a first circuit board, a second circuit board, first conducting members, second conducting members and TED chips. The first circuit board includes first circuit regions, each having a first conducting layer and first penetrating holes; the second circuit board includes second circuit regions, each having a second conducting layer and second penetrating holes; each first conducting member is passed and fixed into each respective first penetrating hole; each second conducting member is passed and fixed into each respective second penetrating hole; each TED chip is clamped between the first circuit board and the second circuit board, and each first conducting member has an end attached to the TED chip and the other end attached to the first conducting layer, and each second conducting member has an end attached to the TED chip and the other end attached to the second conducting layer.

Abstract: A heat exchange device includes a housing, a heat exchange module, and a piezoelectric module. Isolated inner and outer circulation chambers are formed in the housing. The heat exchange module in the housing includes a stack of separated plates parallel to each other. An inner channel communicated with the inner circulation chamber and an outer channel communicated with the outer circulation chamber are defined respectively by both sides of one of the plates and the other adjacent plates. The piezoelectric module in the housing includes a piezoelectric chip, and first and second heat exchange sides thermally coupled to the piezoelectric chip. The first heat exchange side is located in the inner circulation chamber and the second heat exchange side is located in the outer circulation chamber, so that heat can be transferred between the inner and outer circulation chambers via the piezoelectric chip.

Abstract: A fan comprises a stator base, a rotor, at least one blade, an upper magnetic pole plate, a lower magnetic pole plate, a coil and a sidewall. The stator base comprises a stator base having a seat and a tubular portion protruding from the seat and having an axial hole. The seat and the tubular portion are formed as a monolithic piece to be a magnetic conductor. The rotor enclosing the tubular portion comprises a shaft disposed in the axial hole. The blades are circumferentially disposed at a periphery of the rotor. The upper magnetic pole plate is disposed near a top of the tubular portion and the lower magnetic pole plate is disposed near a bottom of the tubular portion. The coil is disposed between the upper and lower magnetic pole plates. The sidewall is circumferentially disposed at a periphery of the stator base.

Abstract: An anti-loose screw suitable for fastening various construction work pieces comprises: a screw head; a cylindrical rod, coupled to the screw head; a high thread and a low thread, spiraling around the cylindrical rod, and uniformly distributed on the cylindrical rod, wherein the crests of the low thread on the cylindrical rod are machined by a cutter to form cut slots and irregular burrs. When the screw is driven into a construction work piece, those two uniformly distributed high and low threads can keep the balance of the advancing screw so that the advancing screw can be free from any deviation. Further, the extruded scraps will be concentrated to provide a superior anchoring effect. Furthermore, in cooperation with the wrapping effect of the expanding material of the work piece, the cut slots and burrs formed via the machining of a cutter can raise the anti-loose capability of the screw.

Abstract: A fan comprises a stator base, a rotor, at least one blade, an upper magnetic pole plate, a lower magnetic pole plate, a coil and a sidewall. The stator base comprises a stator base having a seat and a tubular portion protruding from the seat and having an axial hole. The seat and the tubular portion are integrally formed as a single piece to be a magnetic conductor. The rotor enclosing the tubular portion comprises a shaft disposed in the axial hole. The blades are circumferentially disposed at a periphery of the rotor. The upper magnetic pole plate is disposed near a top of the tubular portion and the lower magnetic pole plate is disposed near a bottom of the tubular portion. The coil is disposed between the upper and lower magnetic pole plates. The sidewall is circumferentially disposed at a periphery of the stator base.

Abstract: A power factor correction circuit structure is described. The power factor correction circuit comprises a series connection of a first winding, a diode, an inductor and a first capacitor. The polarity of the first winding is opposite to that of the primary winding. A second capacitor is connected to the primary winding to control the primary winding and build a voltage across the first capacitor. This voltage is transferred to the first winding through the transformer to boost the first capacitor voltage and improve the power factor.

Abstract: The present invention provides a power supply apparatus with a plurality of digital control units. Each digital control unit is used to control an independent output terminal for outputting a stable output voltage. The output voltage is not fed back to the primary side of the transformer.

Abstract: A power factor correction circuit structure is described. The power factor correction circuit comprises a series connection of a first winding, a diode, an inductor and a first capacitor. The polarity of the first winding is opposite to that of the primary winding. A second capacitor is connected to the primary winding to control the primary winding and build a voltage across the first capacitor. This voltage is transferred to the first winding through the transformer to boost the first capacitor voltage and improve the power factor.

Abstract: The present invention provides a power supply apparatus with a plurality of digital control units. Each digital control unit is used to control an independent output terminal for outputting a stable output voltage. The output voltage is not fed back to the primary side of the transformer.

Abstract: The present invention describes a planar transformer having a plurality of juxtaposed magnetic cores as well as a two-layer printed circuit board for spiralling a plurality of windings. Each arm of a plurality of juxtaposed magnetic cores respectively goes through a corresponding hole in the middle of these windings, to magnetically couple the current in the main winding to the other windings.

Abstract: A power factor correction circuit structure is described. The circuit connects a bridge rectifier and a first capacitor in series. The first capacitor, a winding and a first switching device are also connected in series. The first switching device is the low-side switching device in a bridge converter. The first switching device, a second switching device and a second capacitor are also connected in series, The second switching device is the high-side switching device in the bridge converter and the second capacitor is the boost capacitor in the PFC circuit. The winding can be one additional winding of the main transformer in the bridge converter or an independent inductor.

Abstract: A power factor correction circuit structure is described. The circuit connects a bridge rectifier and a first capacitor in series. The first capacitor, a winding and a first switching device are also connected in series. The first switching device is the low-side switching device in a bridge converter. The first switching device, a second switching device and a second capacitor are also connected in series. The second switching device is the high-side switching device in the bridge converter and the second capacitor is the boost capacitor in the PFC circuit. The winding can be one additional winding of the main transformer in the bridge converter or an independent inductor.