73results about "Laundry dryer apparatus" patented technology

A control method of a dryer is disclosed. A control method of a dryer including a heat pump having a variable velocity type compressor, the control method includes steps of selecting at least one course supplying air or dried air; increasing an activation velocity of the compressor to a target velocity, as the selected course is implemented; and adjusting an open degree of an expansion valve provided in the heat pump.

The invention discloses a heat pump drying system for drying clothes by using a roller and a control method of the heat pump drying system. The system comprises a heat pump system for drying the clothes, and an air inlet and an air outlet which are communicated with the roller for accommodating the clothes respectively, wherein the heat pump system comprises a compressor, a condenser, a throttling device and an evaporator which are connected with one another in turn through a refrigerant circulating pipeline to form a circulating system; the heat pump system, the air inlet and the air outlet are integrated through an upper cover plate and a lower cover plate; an air deflector, the evaporator, the condenser and an air supply fan are arranged between the air inlet and the air outlet in turn to form an air circuit; the compressor is sealed in closed space by the upper cover plate and the lower cover plate; and the air supply fan is a direct-current fan with a controllable rotating speed, and the rotating speeds at different drying stages are correspondingly controlled to reduce the load of the compressor. The heat pump drying system has the characteristics of saving energy and shortening drying time.

A laundry dryer has drum (1) which stores laundry; heat pump device including pipeline connecting compressor (16), which compresses refrigerant, radiator (17), pressure reducer (18), which reduces refrigerant after heat emission at radiator (17), and heat absorber (19), so that pipeline allows sequential circulation of refrigerant; circulation duct (13) in which blower (4) is situated to blow dry air so that dry air sequentially circulates from drum (1), heat absorber (19), radiator (17), to drum (1) again; air volume controller which controls blower (4) to adjust dry air volume in circulation duct (13); and compressor controller which controls rotational speed of compressor (16), wherein compressor controller changes rotational speed of compressor (16) based on fluctuation in dry air volume in circulation duct (13).

A drying apparatus and method are disclosed. The drying apparatus includes a drying compartment and a heating device that heats air to be provided to the compartment. The heating device includes a coil through which is conducted a heated liquid, and the air is heated as it passes along the coil. The heated liquid can be provided from a source internal or external to the drying apparatus and in at least some embodiments is heated water provided from a hydronic heating device located internal to the drying apparatus. In at least some embodiments, the heated air provided through the drying compartment is returned to the heating device and recirculated through the compartment. In at least some of these embodiments, the heated air emanating from the drying compartment passes through a condensing device that removes moisture from the air before it is returned to the heating device.

A clothes dryer provided with a washing tub, an air circulator, and a heat pump and drying laundry by operation of the air circulator and the heat pump. The rotational speed of a compressor is changed by controlling frequency, and the clothes dryer can be operated by selection of either a quick-drying mode for drying the laundry in a relatively short time by changing a drive frequency of the compressor or a saving mode for drying the laundry in a time longer than the time of the quick-drying mode. In the saving mode, the compressor is driven in a frequency band providing a high coefficient of performance.

Method for controlling a drying course of a laundry dryer including the steps of (a) starting a drying course by using high temperature drying air, and sensing dryness of a drying object periodically, (b) determining a dryness saturation time point at which the dryness sensed thus exceeds a preset reference value Q, (c) determining a load of the drying object according to the drying saturation time point T_sat, and (d) varying a drying algorithm depending on the load of the drying object determined thus, whereby preventing a small amount of laundry from sticking to a drum in a drying course by varying a control algorithm of the drying motor in a case an amount of the drying object is determined to be small accurately with reference to a saturation time point of an electrode sensor.

A home laundry drier (1) includes a laundry drum (4) which is located inside a casing (3) to rotate about an longitudinal axis (A), and a closed circuit hot-air generator (7) provided with: an air recirculating conduit (8) connected to laundry drum (4); a centrifugal fan (9) and heat-pump means (10). The heat pump means (10) includes first (12) and second air/refrigerant heat exchangers (13) located in the air recirculating conduit (8) to cool the airflow coming out from the laundry drum, and respectively, to heat the airflow returning back into laundry drum (4). The home laundry drier (1) further includes an electric motor (14) designed to simultaneously rotate both centrifugal fan (9) and the laundry drum (4) through transmission system means (16); and inverter means (23) controlling the electric motor (14) and configured to receive a predetermined speed which is associated to a nominal airflow rate within the air recirculating conduit (8) and to a nominal drum speed. The electric motor (14) is controlled so that the output motor speed is maintained substantially equal to a predetermined speed, independently of decreasing of the airflow rate caused by clogging-up of particles within the first (12) and/or second air/refrigerant heat exchangers (13) of the heat-pump means (10).

A control method of a dryer is disclosed. A control method of a dryer including a heat pump having a inverter compressor includes determining a driving condition of the dryer; and adjusting at least one of an electric power supplied to the inverter compressor and a driving velocity of the compressor based on the driving condition.

A tumble dryer with at least one heat pump system has an air stream circuit (10) including at least one drum (12) for receiving laundry to be dried, at least one refrigerant circuit (14) including at least one compressor (16) with a variable rotation speed, a first heat exchanger (18) for a thermal coupling between the air stream circuit (10) and the refrigerant circuit (14), and a second heat exchanger (20) for a further thermal coupling between the air stream circuit (10) and the refrigerant circuit (14). The tumble dryer further includes a control unit (22) for controlling the rotation speed of the compressor (16) and at least one sensor for detecting at least one physical parameter (TDI, TDO; TEI, TEO; TF; Z; RH) as function of the time of the air stream, the refrigerant ad/or the laundry. A central processing unit is provided, which is arranged to evaluate the time development of the physical parameter (TDI, TDO, TEI, TEO; TF; Z; RH) and which reduces the rotation speed of the compressor (16) according to the evaluation of the time development of the physical parameter (TDI, TDO, TEI, TEO; TF; Z; RH). A corresponding method for controlling a heat pump system for a tumble dryer is also set forth.

A clothes dryer and a method for controlling its operation are disclosed, in which the clothes dryer includes a second motor being separately driven from a drum or a circulation fan to control a cooling fan for cooling a condenser. As for the second motor, a variable speed motor is used and amount of heating of a heater of the clothes dryer is variable. In the method for controlling an operation of a clothes dryer, the cooling fan is operated when a predetermined period of time passes after the cooling fan being stopped during an initial operation, or the cooling fan is operated at a regular speed when a temperature of air circulating reaches a predetermined degree after the cooling fan being operated at a low speed during the initial operation of the clothes dryer. Also, the speed of the cooling fan is varied according to amount of heating of the heater.

A drier with a curvalinear chamber having a heat transfer surface at one end and baffles at the other end. A fan is provided to circulate air within the chamber. In the process for drying, the product to be dried is positioned within the chamber and air circulated across the heat transfer surface, toward the baffle, past the product, and back to the heat transfer surface.

The invention relates to a solar heat collector-oven combined clothes drying device, comprising a solar drying box, the solar drying box includes a heat transfer pipe, a temperature and humidity meter, an incubator, a movable glass door, a fan and a regulating valve, and the heat preservation There are three rows of heat transfer pipes in the box, and regulating valves are installed on the heat transfer pipes. There are movable glass doors on the front and back of the incubator, fans are installed on the rear movable glass doors, and a temperature and humidity instrument is installed on the side. Inside the incubator. Compared with the prior art, the present invention occupies a small area, can be used indoors under the condition of completely imitating the "natural environment", and is equipped with an ultraviolet disinfection lamp and a hollowed-out aromatherapy box, which can dry clothes while drying them. Sterilization and fresh air achieve better results than outdoor drying. The invention can be effectively applied to various families, hotels, schools, etc., and has high practical value and economic and social benefits.

Looking a solution for appliances that consumes large amount of electric energy in houses, Solar energy appears to be more suitable for the application. One of the most consuming household appliances is the clothes dryer. Implementing a heat exchanger inside the machine, the electric resistance that heats the air can be substituted, lowering the electric cost and environmental risks. This can be done with a solar water heater, converting solar radiation into useful heat. A compact heat exchanger has been design to provide the 1500 W that the electric resistance supplies to the clothes dryer in order to dry clothes. Nevertheless, Other design can be suitable for the application.

A nonvolatile semiconductor memory device which is superior in writing and charge holding properties, including a semiconductor substrate in which a channel formation region is formed between a pair of impurity regions formed with an interval, and a first insulating layer, a floating gate, a second insulating layer, and a control gate over an upper layer portion of the semiconductor substrate. It is preferable that a band gap of a semiconductor material forming the floating gate be smaller than that of the semiconductor substrate. For example, it is preferable that the band gap of the semiconductor material forming the floating gate be smaller than that of the channel formation region in the semiconductor substrate by 0.1 eV or more. This is because, by decreasing the bottom energy level of a conduction band of the floating gate electrode to be lower than that of the channel formation region in the semiconductor substrate, carrier injecting and charge holding properties are improved.

The present invention relates to a washing dryer. The invention aims at the washing dryer with a drying function generated by a heat pump for obtaining the following purposes: inhibiting the performance reduction of heat pump, preventing the inferior operation of a compressor, and obtaining the miniaturization and light weight of the whole body. In a drying process, a fan (30) and the compressor (34) for cycling are driven, therefore the air in a sink (3) sequentially passes through an evaporator (32) and a condenser (33) in a ventilating pipe (26) and is changed to dry hot wind and is supplied into the sink (3) thereby recycling and drying the washed articles. A control device which can change the operation frequency of a converter of the compressor (34) for controlling the operation controls after a preset time period (30 minutes) from a drying step so that the compressor (34) operates with a preset rotating speed Rt (85Hz) lower than a target maximum frequency Rmax (100Hz). Therefore, the flowing-out of the oil from the compressor (34) can be restrained for always sustaining an ideal oil height.