JP2012205633A - Clothes dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve energy saving performance by reducing the rotation number of a compressor without exhausting a part of drying air to outside.SOLUTION: There are provided with: a blower fan 37 supplying hot air heated by a heat pump device 43 to a rotary drum 32; an air passage 38 through which drying air blown by the blower fan 37 is caused to flow from a heat sink 47 into a radiator 45 and then introduced into the rotary drum 32; a cooling fan 52 cooling the air passage 38; temperature detecting means 49 for detecting a temperature of a refrigerant; rotation number detecting means 51 for detecting the rotation number of a compressor 44; and control means 50 for controlling a drying operation. The control means 50 is configured to drive the cooling fan 52 when the rotation number of the compressor 44 decreases from a set rotation number to a prescribed rotation number.

Description

  The present invention relates to a clothes dryer for drying clothes and the like.

  Conventionally, this type of clothes dryer is generally configured as shown in FIG. Hereinafter, the configuration will be described. As shown in FIG. 12, a rotating drum 3 that rotates about a horizontal axis 2 as a central axis is disposed in the outer case 1. A clothing insertion port 4 formed on the front surface of the rotating drum 3 is opened on the front surface of the outer case 1 and is opened and closed by a door 5. A circulation air passage 7 including a drying chamber 6 set inside the rotary drum 3 is formed in the outer case 1. The circulation air passage 7 has a drying chamber 6, a blower chamber 8, a heat exchange chamber 9 and the like in the middle, and the air in the drying chamber 6 flows from the exhaust port 10 provided on the back wall of the rotating drum 3 to the blower chamber 8. Through the heat exchange chamber 9, the air is circulated into the drying chamber 6 from a blowout port 11 provided in front of the drying chamber 6.

  A fan 12 is provided in the air blowing chamber 8. In the heat exchange chamber 9, a heat absorber 13 is disposed on the upstream side, and a heat radiator 14 is disposed on the downstream side of the heat absorber 13. The heat absorber 13 and the heat radiator 14 constitute a heat pump device including an expansion mechanism 16 such as a compressor 15 and a capillary tube. The humid air flowing out from the drying chamber 6 is cooled and dehumidified by the heat absorber 13. It becomes low temperature and low humidity and is heated by the radiator 14 to become high temperature and low humidity dry air.

  Further, a part of the high-temperature dry air heated by the radiator 14 is caused to flow out of the circulation air passage 7 from the exhaust port 17 so that the refrigeration cycle of the heat pump is maintained.

  Then, the high-temperature and low-humidity dry air heated by the radiator 14 is supplied from the blowout port 11 to the drying chamber 6 and is used for drying the clothes therein. A filter 18 is attached to the back wall of the rotating drum 3 forming a part of the circulation air passage 7 so as to cover the exhaust port 10, and the lint that comes out of the clothes is collected. Arrow A indicates the flow of wind. A motor 19 rotationally drives the rotary drum 3 and the fan 12 and is transmitted to the rotary drum 3 via the belt 20 and to the fan 12 via the belt 21 (for example, Patent Document 1). reference).

  In addition, during the drying operation, it is considered to detect the resistance value of the garment so that the garment in the rotating drum is in contact with the electrode and detect the dry state of the garment (for example, see Patent Document 2).

JP 7-178289 A Japanese Patent Application Laid-Open No. 5-25397

  However, in the conventional configuration, a part of the heated drying air is exhausted outside the circulation air path regardless of the amount of clothes to be dried and the degree of drying, so that the drying efficiency is poor and the drying time is long. There was a problem.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a clothes dryer that improves the energy saving performance by suppressing the rotational speed of the compressor without exhausting part of the drying air to the outside of the device. Objective.

  In order to solve the above-described conventional problems, a clothes dryer of the present invention includes a blower fan that supplies hot air heated by a heat pump device to a rotating drum, and drying air blown by the blower fan from a heat absorber. An air path that flows to the radiator and leads to the rotating drum, a cooling fan that cools the air path, a temperature detection means that detects the temperature of the refrigerant, and a rotation speed detection means that detects the rotation speed of the compressor; And a control means for controlling the drying operation, wherein the control means drives the cooling fan when the rotational speed of the compressor decreases from a set rotational speed to a predetermined rotational speed.

  Thus, without exhausting a part of the drying air flowing through the air path to the outside of the apparatus, the number of power consumption can be reduced by suppressing the number of rotations of the compressor, and energy saving can be improved.

  The clothes dryer of the present invention can improve the energy saving performance by suppressing the rotation speed of the compressor without exhausting a part of the drying air to the outside.

Sectional drawing of the clothes dryer of Embodiment 1 of this invention System diagram of the clothes dryer Block diagram of the clothes dryer Perspective view of resistance detection means of the clothes dryer (A) Temperature change figure of refrigerant of heat pump device of clothes dryer (b) Speed change chart of compressor of clothes dryer (c) Operation diagram of cooling fan of clothes dryer Block diagram of a clothes dryer according to a second embodiment of the present invention. (A) (d) Output characteristic diagram of resistance detection means of clothes dryer of the clothes dryer (b) (e) Speed change diagram of compressor of the clothes dryer (c) (f) The clothes dryer Of cooling fan operation (A) (d) Output characteristic diagram of resistance detection means of clothes dryer according to embodiment 3 of the present invention (b) (e) Rotational speed change diagram of compressor of clothes dryer (c) (f) Operation diagram of clothes dryer cooling fan (A) (d) Output characteristic diagram of resistance detection means of clothes dryer of embodiment 4 of the present invention (b) (e) Rotational speed change diagram of compressor of clothes dryer (c) (f) Operation diagram of clothes dryer cooling fan (A) (d) Output characteristic diagram of resistance detection means of clothes dryer of embodiment 5 of the present invention (b) (e) Rotational speed change diagram of compressor of clothes dryer (c) (f) Operation diagram of clothes dryer cooling fan (A) (d) Output characteristic diagram of resistance detection means of clothes dryer of Embodiment 6 of the present invention (b) (e) Rotational speed change diagram of compressor of clothes dryer (c) (f) Operation diagram of clothes dryer cooling fan Cross section of conventional clothes dryer

In order to reduce the pressure of a high-pressure refrigerant, a rotary drum that houses and dries clothing, a motor that rotationally drives the rotary drum, a radiator that radiates heat from the compressor and the compressed refrigerant, and a high-pressure refrigerant A heat pump device connected by a pipe line so that the refrigerant circulates between the squeezing means and a heat absorber in which the refrigerant reduced in pressure takes heat from the surroundings, and hot air heated by the heat pump device is converted into the rotating drum A blower fan to be supplied to, a wind path for flowing drying air blown by the blower fan from a heat absorber to a radiator, a cooling fan for cooling the wind path, and a temperature of the refrigerant A temperature detection means for detecting the rotation speed, a rotation speed detection means for detecting the rotation speed of the compressor, and a control means for controlling the drying operation, wherein the control means is configured such that the rotation speed of the compressor is determined from the set rotation speed. Predetermined By driving the cooling fan when the engine speed drops, the compressor speed is reduced and the energy consumption is improved without exhausting part of the hot air outside the machine. can do.

  In particular, according to a second invention, in the first invention, there is provided resistance detection means for detecting the resistance value of the clothing in the rotating drum, and capacitance detection means for detecting the amount of clothing from the information of the resistance detection means, The control means divides the amount of clothing into at least two stages based on the information of the capacity detection means, and when the amount of clothing is small, the cooling fan is turned off when the rotational speed of the compressor is lowered compared to when it is large. By driving, it is possible to optimize the drying operation according to the capacity of clothing without exhausting part of the warm air outside the machine, reducing the number of revolutions of the compressor and reducing power consumption Less energy can be saved.

  In a third aspect of the invention, in particular, in the first aspect of the invention, there is provided resistance detecting means for detecting the resistance value of the clothes in the rotating drum, and capacity detecting means for detecting the amount of clothes from the information of the resistance detecting means, The control means divides the amount of clothing into at least two stages based on the information of the capacity detection means, and when the amount of clothing is small, the cooling fan is not operated so that a part of the warm air is taken out of the machine. Without exhausting, the drying operation can be optimized in accordance with the capacity of the clothes, the number of power consumption can be reduced by suppressing the rotation speed of the compressor, and the energy saving performance can be improved.

  According to a fourth aspect of the present invention, in particular, the control means of any one of the first to third aspects divides the amount of clothing into at least two stages from the information of the capacity detection means, and when the amount of clothing is small, the control means is dried. By reducing the maximum rotation speed of the compressor at the start of operation, it is possible to optimize the drying operation according to the capacity of the clothes without exhausting part of the hot air outside the machine, and compressing Energy consumption can be improved by reducing the number of revolutions of the machine and reducing power consumption.

  According to a fifth aspect of the invention, in particular, in the fourth aspect of the invention, there is provided dryness detection means for detecting the dryness degree of the clothes from the information of the resistance detection means, and the control means is the dryness degree of the clothes based on the information of the dryness detection means. Is divided into at least two stages, and the cooling fan is driven when the rotational speed of the compressor decreases to a low speed when the dryness of the clothes is high, and a part of the hot air is Without exhausting the air from the machine, the drying operation can be optimized according to the degree of drying of the clothes, the number of revolutions of the compressor can be reduced, the power consumption can be reduced, and the energy saving performance can be improved.

  In a sixth aspect of the invention, in particular, in the fourth aspect of the invention, there is provided dryness detection means for detecting the dryness degree of the clothing from the information of the resistance detection means, and the control means is the dryness degree of the clothing based on the information of the dryness detection means. Is divided into at least two stages, and the cooling fan is not operated when the degree of drying of the clothes is high, so that it is possible to dry according to the degree of drying of the clothes without exhausting part of the warm air outside the machine. The operation can be optimized, the rotational speed of the compressor can be suppressed, the power consumption can be reduced, and the energy saving performance can be improved.

  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.

(Embodiment 1)
1 is a cross-sectional view of a clothes dryer according to the first embodiment of the present invention, FIG. 2 is a system conceptual diagram of the clothes dryer, FIG. 3 is a block diagram of the clothes dryer, and FIG. FIG. 5 is a time chart showing the operation of the clothes dryer, (a) is the refrigerant temperature of the heat pump device of the clothes dryer, and (b) is the same. The rotation speed of the compressor of the clothes dryer, (c), shows the operation of the cooling fan of the clothes dryer.

  In FIG. 1 to FIG. 5, a rotary drum 32 that puts an object to be dried such as clothing 31 and dries is rotatably provided in a body 33 of the clothing dryer. A motor 34 for driving the rotating drum 32 is provided, and the rotating drum 32 is rotated via the rotating drum belt 35 by driving the motor 34. The drying air rotates the blower fan 37 through the blower fan belt 36 by driving the motor 34 and introduces the dry air through the air passage 38 into the rotary drum 32 as a drying chamber containing the clothes 31. I have to.

  The resistance detection means 39 for detecting the resistance value of the clothing 31 is disposed in the rotary drum 32 so as to come into contact with the clothing 31 stirred in the rotary drum 32 during the drying operation. The resistance detection means 39 is composed of an electrode 40 made of two conductive members and an insulating member 41 that electrically insulates between the electrodes 40. By detecting the resistance value between the electrodes 40 by the resistance detection means 39, The resistance value of the garment 31 in contact between the two electrodes 40 is detected.

  The heat pump device 43 includes a compressor 44, a radiator 45 that dissipates heat of the compressed refrigerant, a throttle means 46 that includes a throttle valve, a capillary tube, and the like for reducing the pressure of the high-pressure refrigerant, and a low-pressure reduced pressure. The refrigerant is connected to a heat absorber 47 that takes heat from the surroundings by a pipe 48 so that the refrigerant circulates, and the refrigerant flows and circulates in the direction of arrow A in FIG. 2 to realize a heat pump cycle. To do.

  The heat absorber 47 of the heat pump device 43 constitutes a dehumidifying means, and the radiator 45 that heats the drying air cooled and dehumidified by the heat absorber 47 constitutes a heating means.

  The temperature detecting means 49 is provided in the radiator 45 and detects the temperature of the refrigerant flowing through the radiator 45. The control means 50 controls the motor 34, the heat pump device 43, etc., and controls the drying operation. The control means 50 has a rotation speed detection means 51 for detecting the rotation speed of the compressor 44, and controls the rotation speed of the compressor 44 so that the temperature of the refrigerant flowing through the radiator 45 becomes constant at the set temperature. Control. The main body 33 is provided with a cooling fan 52 that blows outside air into the main body 33 and cools the air passage 38 through which the drying air circulates.

  About the clothes dryer comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, the clothes 31 to be dried are opened and closed and the door 42 is opened and put into the rotary drum 32. When the drying operation is started, the motor 34 is driven, and the rotary drum 32 and the blower fan 37 rotate to enter the air path 38. A flow of drying air (arrow B) occurs. The drying air takes moisture from the clothes 31 in the rotary drum 32 and becomes humid, and then is guided to the heat absorber 47 of the heat pump device 43 through the air passage 38.

  The drying air deprived of heat by the low-temperature refrigerant in the heat absorber 47 is cooled and dehumidified to be dried low-temperature air and carried to the radiator 45. The amount of heat absorbed by the heat absorber 47 is added to the amount of heat from the compressor 44, and is heated by heat radiation from the refrigerant that has become high temperature, and is circulated again into the rotary drum 32 from the outlet 38a. By repeating the above, drying of the clothing 31 proceeds.

  When the output of the temperature detecting means 49 for detecting the temperature of the refrigerant flowing through the radiator 45 approaches a predetermined temperature, the control means 50 reduces the rotation speed of the compressor 44 so as to keep the refrigerant temperature constant. To control. For example, as shown in FIG. 5A, when the temperature of the refrigerant detected by the temperature detecting means 49 after starting the drying operation approaches a predetermined value t1 (for example, 70 ° C.), the control means 50 As shown in FIG. 5B, the rotation speed of the compressor 44 is controlled so as to decrease from R1 (for example, 90 r / min).

And when the compressor 44 falls to predetermined rotation speed R2 (for example, 60 r / min), the driving | operation of the cooling fan 52 is started as shown in FIG.5 (c). The air passage 38 is cooled by the operation of the cooling fan 52, the temperature of the drying air flowing through the air passage 38 can be lowered, and the predetermined rotational speed can be maintained without drastically reducing the rotational speed of the compressor 44. However, the clothing 31 can be optimally dried.

  That is, the rotation speed of the compressor 44 is rotated at a low speed so that the temperature of the refrigerant is stabilized at the set predetermined value t1, and the temperature of the drying air flowing through the air passage 38 is stabilized. The power consumption can be reduced by suppressing the number of rotations of the compressor 44 while maintaining the drying operation optimally.

  As described above, the blower fan 37 that supplies the hot air heated by the heat pump device 43 to the rotary drum 32 and the drying air blown by the blower fan 37 flow from the heat absorber 47 to the radiator 45 to rotate the rotary drum. 32, a cooling fan 52 that cools the air path 38, a temperature detection means 49 that detects the temperature of the refrigerant, a rotation speed detection means 51 that detects the rotation speed of the compressor 44, and a drying operation. The control means 50 is configured to drive the cooling fan 52 when the rotational speed of the compressor 44 decreases from the set rotational speed to a predetermined rotational speed. Without exhausting the flowing warm air to the outside of the apparatus, the number of power consumption can be reduced by suppressing the number of rotations of the compressor 44, and energy saving performance can be improved.

(Embodiment 2)
FIG. 6 is a block diagram of a clothes dryer according to the second embodiment of the present invention, FIG. 7 is a time chart showing the operation of the clothes dryer, and (a) and (d) show the clothes being dried. Output characteristics of the resistance detection means, (b) and (e) show the rotation speed of the compressor, and (c) and (f) show the operation of the cooling fan. A feature of the present embodiment is that a capacity detection unit 53 that detects the amount of clothing based on information from the resistance detection unit 39 is provided. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  As shown in FIG. 7 (a), if the output of the resistance detection means 39 during time T after the start of the drying operation is greater than y1, the capacity detection means 53 determines that the amount of clothing 31 is large, and the control is performed. As shown in FIGS. 7B and 7C, the means 50 operates the cooling fan 52 when the rotation speed of the compressor 44 decreases from R1 (for example, 90 r / min) to R2 (for example, 60 r / min). Start.

  Further, as shown in FIG. 7D, if the output of the resistance detection means 39 is smaller than y1, the capacity detection means 53 determines that the amount of the clothing 31 is small, and the control means 50 determines that the output of the resistance detection means 39 is as shown in FIG. As shown in f), when the rotation speed of the compressor 44 decreases to R3 (for example, 50 r / min), the operation of the cooling fan 52 is started.

  Here, the operation of the cooling fan 52 is set so that the rotational speed R3 <R2 of the compressor 44. When the amount of the garment 31 is small, the rotational speed of the compressor 44 is reduced to reduce the power consumption. In addition, the operation time of the cooling fan 52 is reduced according to the amount of clothing 31 so that the power consumption can be suppressed.

  As described above, the resistance detecting means 39 for detecting the resistance value of the clothing in the rotary drum 32 and the capacity detecting means 53 for detecting the amount of the clothing 31 from the information of the resistance detecting means 39 are provided. The amount of the clothing 31 is divided into at least two stages based on the information of the detection means 53. When the amount of the clothing 31 is small, the cooling fan 52 is turned off when the rotational speed of the compressor 44 is reduced to a lower rotational speed than when the clothing 31 is large. Energy saving can be improved by controlling the operation of the cooling fan 52 according to the capacity of the clothing 31 without exhausting the warm air flowing through the air passage 38 out of the machine. it can.

(Embodiment 3)
FIG. 8 is a time chart showing the operation of the clothes dryer according to the third embodiment of the present invention. (A) and (d) are output characteristics of the resistance detection means when the clothes are dried. (E) shows the rotation speed of the compressor, and (c) and (f) show the operation of the cooling fan. A feature of the present embodiment is that a capacity detecting means 53 for detecting the amount of clothes based on information from the resistance detecting means 39 is provided. When the amount of clothes detected by the capacity detecting means 53 is small, the cooling fan 52 is operated. This is what I did not. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  As shown in FIG. 8 (a), if the output of the resistance detection means 39 during time T after the start of the drying operation is greater than y1, the capacity detection means 53 determines that the amount of clothing is large, and the control means 50, when the rotation speed of the compressor 44 decreases from R1 (for example, 90 r / min) to R2 (for example, 60 r / min) as shown in FIGS. To do.

  Further, as shown in FIG. 8D, if the output of the resistance detection means 39 is smaller than y1, the capacity detection means 53 determines that the amount of clothing is small, and the control means 50 determines that the output of the resistance detection means 39 is as shown in FIGS. ), Since the cooling fan 52 is not operated, the operation time of the cooling fan 52 can be reduced according to the amount of the clothing 31, and the power consumption can be suppressed.

  As described above, the resistance detecting means 39 for detecting the resistance value of the clothing 31 in the rotary drum 32 and the capacity detecting means 53 for detecting the amount of the clothing 31 from the information of the resistance detecting means 39 are provided. The amount of the clothing 31 is divided into at least two stages based on the information of the capacity detection means 53, and when the amount of the clothing 31 is small, the cooling fan 52 is not operated. By controlling the operation of the cooling fan 52 in accordance with the capacity of the garment 31 without exhausting outside the apparatus, the energy saving performance can be improved.

(Embodiment 4)
FIGS. 9A and 9B are time charts showing the operation of the clothes dryer according to the fourth embodiment of the present invention. FIGS. 9A and 9D are output characteristics of resistance detection means when clothes are dried, and FIG. (E) shows the rotation speed of the compressor, and (c) and (f) show the operation of the cooling fan. A feature of the present embodiment is that a capacity detecting means 53 for detecting the amount of clothes based on information from the resistance detecting means 39 is provided, and when the amount of clothes detected by the capacity detecting means 53 is small, compression at the start of the drying operation is performed. The maximum rotation speed of the machine 44 is lowered. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  As shown in FIG. 9 (a), if the output of the resistance detection means 39 during the time T after the start of the drying operation is greater than y1, the capacity detection means 53 determines that the amount of clothing 31 is large, and the control is performed. As shown in FIGS. 9B and 9C, the means 50 operates the cooling fan 52 when the rotation speed of the compressor 44 decreases from R1 (for example, 90 r / min) to R2 (for example, 60 r / min). Start.

  Further, as shown in FIG. 9D, if the output of the resistance detection means 39 is smaller than y1, the capacity detection means 53 determines that the amount of the clothing 31 is small, and the control means 50 determines that the output of the resistance detection means 39 is as shown in FIG. As shown in f), the rotation speed of the compressor 44 is initially operated at R4 (for example, 75 r / min), the refrigerant temperature becomes high, and the rotation speed of the compressor 44 is set to R3 (for example, 50 r / min). ), The operation of the cooling fan 52 is started.

Here, since the rotation speed of the compressor 44 is set to satisfy R4 <R1, R3 <R2, the input of the compressor 44 can be suppressed according to the amount of the clothing 31, and the cooling fan 52 The operation time can be reduced and the power consumption can be suppressed.

  As described above, the amount of the garment 31 is divided into at least two stages based on the information of the capacity detection means 53, and when the amount of the garment 31 is small, the maximum rotational speed of the compressor 44 at the start of the drying operation is lowered. It is possible to improve energy saving by controlling the operation of the compressor 44 and the cooling fan 52 according to the capacity of the clothing 31 without exhausting the warm air flowing through the air passage 38 to the outside of the machine. Can do.

(Embodiment 5)
FIGS. 10A and 10B are time charts showing the operation of the clothes dryer according to the fifth embodiment of the present invention. FIGS. 10A and 10D are output characteristics of resistance detection means when clothes are dried, and FIG. (E) shows the rotation speed of the compressor, and (c) and (f) show the operation of the cooling fan. As shown in FIG. 6, the present embodiment is characterized in that a dryness detection unit 54 that detects the dryness of clothes based on information from the resistance detection unit 39 is provided. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  As shown in FIG. 10A, if the output of the resistance detection means 39 during the time T after starting the drying operation is smaller than a1, the dryness detection means 54 determines that the degree of drying of the clothes is low, As shown in FIGS. 10B and 10C, the control unit 50 operates the cooling fan 52 when the rotation speed of the compressor 44 decreases from R1 (for example, 90 r / min) to R2 (for example, 60 r / min). To start.

  Also, as shown in FIG. 10 (d), if the output of the resistance detection means 39 is greater than a1, the dryness detection means 54 determines that the degree of dryness of the clothes is high, and the control means 50 determines that the output of FIG. 10 (e). As shown in (f), when the rotation speed of the compressor 44 decreases to R3 (for example, 50 r / min), the operation of the cooling fan 52 is started.

  Here, the operation of the cooling fan 52 is set so that the rotation speed R3 <R2 of the compressor 44, and the operation time of the cooling fan 52 is reduced according to the degree of drying of the clothing, thereby suppressing the power consumption. Can do.

  As described above, the dryness detection means 54 for detecting the dryness of the garment 31 from the information of the resistance detection means 39 is provided, and the control means 50 determines the dryness of the garment 31 based on the information of the dryness detection means 54 in at least two stages. When the degree of drying of the garment 31 is high, the cooling fan 52 is driven when the rotational speed of the compressor 44 is reduced to a low rotational speed when the clothes 31 are low. Energy saving can be improved by controlling the operation of the cooling fan 52 in accordance with the degree of drying of the clothing 31 without exhausting the flowing warm air outside the apparatus.

(Embodiment 6)
FIGS. 11A and 11B are time charts showing the operation of the clothes dryer according to the sixth embodiment of the present invention. FIGS. 11A and 11D are output characteristics of resistance detection means when clothes are dried, and FIG. (E) shows the rotation speed of the compressor, and (c) and (f) show the operation of the cooling fan. As shown in FIG. 6, the present embodiment is characterized by providing a dryness detecting means 54 for detecting the dryness of clothes based on information from the resistance detecting means 39. When the dryness of clothes is high, the cooling fan 52 is provided. It was designed not to drive. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

As shown in FIG. 11A, if the output of the resistance detection means 39 during the time T after the start of the drying operation is smaller than a1, the dryness detection means 54 determines that the degree of dryness of the garment 31 is low. As shown in FIGS. 11 (b) and 11 (c), the control unit 50 controls the cooling fan 52 when the rotational speed of the compressor 44 decreases from R1 (for example, 90 r / min) to R2 (for example, 60 r / min). Start driving.

  As shown in FIG. 11D, if the output of the resistance detection means 39 is greater than a1, the dryness detection means 54 determines that the degree of dryness of the garment 31 is high, and the control means 50 determines that the output of the resistance detection means 39 is as shown in FIG. ) As shown in (f), the cooling fan 52 is not operated.

  As described above, the dryness detection means 54 for detecting the dryness of the garment 31 from the information of the resistance detection means 39 is provided, and the control means 50 determines the dryness of the garment 31 based on the information of the dryness detection means 54 in at least two stages. When the degree of drying of the garment 31 is high, the cooling fan 52 is not operated, and the degree of drying of the garment 31 is increased without exhausting the warm air flowing through the air passage 38 outside the apparatus. In addition, by controlling the operation of the cooling fan 52, the energy saving performance can be improved.

  As described above, the clothes dryer according to the present invention can improve the energy saving performance by suppressing the number of rotations of the compressor without exhausting part of the drying air to the outside. Useful as.

32 Rotating drum 34 Motor 37 Blower fan 38 Air passage 43 Heat pump device 44 Compressor 45 Radiator 46 Throttle means 47 Heat absorber 48 Pipe line 49 Temperature detection means 50 Control means 51 Rotation speed detection means 52 Cooling fan

Claims (6)

A rotary drum for storing and drying clothes, a motor for rotating the rotary drum, a radiator for radiating heat from the compressor and the compressed refrigerant, and a throttle means for reducing the pressure of the high-pressure refrigerant are reduced. A heat pump device that is connected by a pipe line so that the refrigerant circulates, and a blower fan that supplies warm air heated by the heat pump device to the rotating drum. , An air passage for flowing the drying air blown by the blower fan from the heat absorber to the radiator and leading to the rotating drum, a cooling fan for cooling the air passage, and a temperature detecting means for detecting the temperature of the refrigerant And a rotation speed detection means for detecting the rotation speed of the compressor and a control means for controlling the drying operation, wherein the control means reduces the rotation speed of the compressor from a set rotation speed to a predetermined rotation speed. You Clothes dryer adapted to drive the cooling fan and. Resistance detecting means for detecting the resistance value of the clothes in the rotating drum and capacity detecting means for detecting the amount of clothes from the information of the resistance detecting means are provided, and the control means determines the amount of clothes from the information of the capacity detecting means. The clothes dryer according to claim 1, wherein the cooling fan is driven when the number of rotations of the compressor is reduced to a lower number of rotations when the amount of clothing is small than when the amount of clothing is small. Resistance detecting means for detecting the resistance value of the clothes in the rotating drum and capacity detecting means for detecting the amount of clothes from the information of the resistance detecting means are provided, and the control means determines the amount of clothes from the information of the capacity detecting means. The clothes dryer according to claim 1, wherein the cooling fan is not operated when the amount of clothes is small, divided into at least two stages. The control means divides the amount of clothing into at least two stages from the information of the capacity detection means, and when the amount of clothing is small, the maximum number of revolutions of the compressor at the start of the drying operation is lowered. 4. The clothes dryer according to any one of 3 above. The dryness detection means for detecting the dryness of the clothes from the information of the resistance detection means is provided, and the control means divides the dryness of the clothes into at least two stages based on the information of the dryness detection means, and the dryness of the clothes is determined. 5. The clothes dryer according to claim 4, wherein the cooling fan is driven when the rotational speed of the compressor is lowered to a low rotational speed when it is high and low. The dryness detection means for detecting the dryness of the clothes from the information of the resistance detection means is provided, and the control means divides the dryness of the clothes into at least two stages based on the information of the dryness detection means, and the dryness of the clothes is determined. The clothes dryer according to claim 4, wherein the cooling fan is not operated when the temperature is high.