JP2014018449A - Drum type dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type dryer with high efficiency and high reliability even when drying heat-sensitive chemical fiber-based clothing.SOLUTION: The drum type dryer comprises a heat pump device configured to generate warm air to be fed into a rotary drum. The compressor of the heat pump device is driven by an inverter motor whose rotational frequency can be optionally changed. When drying heat-sensitive chemical fiber-based clothing, the rotational frequency 37 of the compressor is decreased to a predetermined rotational frequency (about 35 Hz) to generate warm air of a low temperature at or lower than about 45°C. The drum type dryer is high in drying efficiency and reliability, since it dries clothing by using the low-temperature warm air.

Description

  The present invention relates to a drum dryer.

  A compressor used in a conventional drum dryer cannot change the number of revolutions arbitrarily (see, for example, Patent Document 1).

  FIG. 3 is an explanatory diagram showing the relationship between the hot air temperature 34 and the rotational speed 35 of the compressor of a conventional drum dryer. In the conventional drum type dryer, when the hot air temperature 34 is excessively higher than a set temperature (for example, 60 ° C.), the hot air temperature is lowered by stopping the rotation of the compressor. Further, in the conventional drum dryer, when the hot air temperature 34 becomes equal to or lower than the set temperature, the compressor is driven again and the drying operation is continued.

European Patent No. 0467188

  In the conventional drum-type dryer, when the hot air temperature is changed depending on the type of clothing, the ability of the heat exchanger has to be reduced in order to lower the hot air temperature.

  That is, the conventional drum dryer stops the compressor when the hot air temperature rises above the set temperature, waits for the hot air temperature to drop due to heat dissipation, and once the hot air temperature falls below the predetermined temperature, Drive the compressor. However, in this case, dehumidification by the heat exchanger cannot be performed while the compressor is stopped. Furthermore, when the compressor is driven again, it must wait until the refrigerant in the heat exchanger is stabilized. That is, there is a problem that the efficiency is lowered when performing the drying operation.

  In order to solve the above-described conventional problems, the drum dryer according to the present invention includes a rotating drum that accommodates an object to be dried, a heat pump device that generates hot air and a blower, and a circulation that circulates the hot air to the rotating drum. And a control unit that controls at least the rotating drum, the air blowing unit, and the heat pump device.The heat pump device has a configuration in which the compressor, the condenser, and the evaporator communicate with each other, and the refrigerant circulates inside. The compressor is driven by an inverter motor whose rotation number is arbitrarily changed by the control unit, and the control unit reduces the compressor to a predetermined number of rotations by approximately 45 when drying the heat-sensitive fiber clothing. A hot air having a low temperature of less than or equal to 0.degree.

  With this configuration, the heat-resistant synthetic clothing is dried with a low temperature of about 45 ° C. or less.

  The drum-type dryer of the present invention dries heat-sensitive synthetic fiber clothing with hot air at a low temperature of about 45 ° C. or less by driving the compressor with an inverter motor whose rotation speed is arbitrarily changed. . That is, there is no need to stop or re-drive the compressor, and efficient drying can be performed with the warm air temperature corresponding to the quality of the clothes.

The block diagram of the drum type dryer in embodiment of this invention Explanatory drawing which shows the relationship between the warm air temperature of the drum type dryer, and the rotation speed of a compressor Explanatory drawing which shows the relationship between the hot air temperature of the conventional drum type dryer, and the rotation speed of a compressor

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

  FIG. 1 shows the configuration of a heat pump drying drum dryer.

  The rotating drum 1 has a rotating shaft 2. The rotating drum 1 is cantilevered by the bearing 5 of the back plate 4 that constitutes the back surface of the housing 3 and the rotating shaft 2. Further, the rotating drum 1 is supported from both sides by a roller 6 fixed to the housing 3.

  The drive motor 7 has a drum pulley 8A at one end of a motor rotation shaft, and rotates the rotary drum 1 via a drum belt 9 hung on the drum pulley 8A.

  In the fan case 10, a fan 13 that is a blower is provided. The fan 13 has a fan pulley 11 provided at the end of the fan rotation shaft. The drive motor 7 has a fan pulley 8B at the other end of the motor rotation shaft. The fan belt 12 is hung on the fan pulley 8B and the fan pulley 11, and the fan 13 rotates. Note that the air outlet 14 of the fan case 10 opens on the back surface of the rotating drum 1.

  A heat pump device 15 is disposed at the bottom of the housing 3. The heat pump device 15 includes a compressor 23, a condenser 24, an evaporator 25, and the like, and a refrigerant circulates therein. The air that has entered the heat pump device 15 from the duct 17 by the rotation of the fan 13 is dehumidified and heated by the heat pump device 15 and becomes hot air. The warm air enters the suction port 16 of the fan case 10 and enters the rotating drum 1 from the blowout port 14 of the fan case 10. The clothes that are to be dried are dried by the warm air that has entered the rotating drum 1. The hot air that has dried the clothes passes through the inside of the lid 18 from the opening at the front of the rotary drum 1, enters the duct 17, and returns to the heat pump device 15 again. In this way, a circulation path is formed and hot air circulates. In the drying operation, the rotary drum 1, the fan 13, the heat pump device 15, and the like are controlled by the control unit 28. The compressor 23 is driven by an inverter motor 30 whose rotation speed is arbitrarily changed based on a command from the control unit 28.

  FIG. 2 is an explanatory diagram showing the relationship between the hot air temperature 36 of the drum dryer and the rotational speed 37 of the compressor 23 in the present invention. First, the case where the clothing to be dried is cotton-based clothing that is difficult to dry will be described with reference to the broken line in FIG. In this case, the compressor 23 (that is, the inverter motor 30) is driven at high speed rotation (for example, about 90 Hz), and hot air having a high temperature (for example, about 70 ° C.) is generated. By using this high temperature hot air, the clothes are dried.

  On the other hand, the case where the clothing to be dried is a synthetic fiber-based clothing that is weak against heat will be described with reference to the solid line in FIG. In this case, the control unit 28 reduces the compressor 23 to a predetermined rotational speed (for example, about 35 Hz), thereby generating hot air having a low temperature of about 45 ° C. or less. By using this low temperature warm air, the clothes are dried. It is possible to provide a drum-type dryer that is dried and highly efficient. As described above, the drum dryer according to the present invention has a low temperature of about 45 ° C. or less when the compressor 23 is driven by the inverter motor 30 whose rotational speed is arbitrarily changed, so Dry with warm air. That is, the compressor 23 does not need to be stopped or re-driven, and efficient drying can be performed with the warm air temperature corresponding to the quality of the clothes. In particular, when drying heat-sensitive synthetic fiber clothing, etc., the compressor 23 is dried to a predetermined number of rotations and dried using warm air at a low temperature of about 45 ° C. or less, so that there is little damage or shrinkage of the clothing. A highly reliable drying operation can be performed.

  Furthermore, the drum-type drying of the present invention has an input unit 31 (shown in FIG. 1) that receives instructions from the user. After instructing the drying operation by the input unit 31, by operating an option key or the like provided in the input unit 31, it is possible to arbitrarily instruct the drying operation with a low temperature of about 45 ° C. or less. . For this reason, it is possible to provide an easy-to-use drum dryer that can cope with a wide range of drying operations desired by the user.

  As described above, the drum-type dryer according to the present invention reduces the rotation of the compressor to a predetermined number of revolutions when drying synthetic fiber-sensitive clothing and the like which are vulnerable to heat, and has a low temperature hot air of about 45 ° C. or less. It is possible to provide a highly reliable drum dryer with less damage and shrinkage of clothes.

DESCRIPTION OF SYMBOLS 1 Rotating drum 2 Rotating shaft 3 Case 4 Back plate 5 Bearing 6 Roller 7 Drive motor 8A Drum pulley 8B Fan pulley 9 Drum belt 10 Fan case 11 Fan pulley 12 Fan belt 13 Fan (fan part)
DESCRIPTION OF SYMBOLS 14 Outlet 15 Heat pump apparatus 16 Inlet 17 Duct 18 Lid 23 Compressor 24 Condenser 25 Evaporator 28 Control part 30 Inverter motor 31 Input part 36 Hot air temperature 37 Rotation speed

Claims (2)

A rotating drum for storing the object to be dried;
A heat pump device and a blower for generating warm air;
A circulation path for circulating the warm air to the rotating drum;
At least the rotating drum, the air blowing unit, and a control unit for controlling the heat pump device,
The heat pump device has a configuration in which a compressor, a condenser, and an evaporator communicate with each other, and a refrigerant circulates inside.
The compressor is driven by an inverter motor whose rotational speed is arbitrarily changed by the control unit,
When drying the garment made of heat-sensitive fiber, the control unit generates hot air having a low temperature of about 45 ° C. or lower by lowering the compressor to a predetermined number of revolutions, and the low temperature of about 45 ° C. or lower. A drum-type dryer, wherein the clothes are dried using warm air of temperature. It further has an input unit that receives instructions from the user,
2. The drum dryer according to claim 1, wherein when a user gives an instruction from the input unit, an operation of drying the clothing using the low-temperature hot air of about 45 ° C. or less is performed.

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