JP2009022570A - Washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing/drying machine with a heating function, which cools parts near an air outlet heated at a high temperature by hot air during heating operation as soon as possible after the end of the heating operation. <P>SOLUTION: The washing/drying machine includes a circulation path 30 communicating with a water tank 2, heating means 42 for heating air, a blower fan 48 for blowing air heated by the heating means 42 outside a main body 1 via an air outlet 43 from an air passage 44 and a control device for controlling operations of washing, spin-drying, drying and heating of laundry. At the heating operation, the control device blows air, introduced from an introducing inlet 40 of the route 30 by driving the fan 48 and heated by the heating means 42, from the route 44 via the outlet 43. At the finish of the heating operation, the device halts the heating means 42 and executes only a supply air operation by the fan 48. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a washing / drying machine having a heating function.

  Conventionally, some washing and drying machines are provided with a heater for drying clothes. In addition, it is also considered to use a washing / drying machine as a heater by blowing air heated by the heater into the room (see Patent Document 1).

For example, this type of washing and drying machine as described in Patent Document 1 is provided with a hot air outlet at the lower portion of the outer tub, a discharge port at the upper portion of the outer tub, and a hot air outlet and a discharge port. And a circulation passage is formed. In this circulation passage, a blower outlet, a warm air blower, and a heater are provided. During the drying operation, the air heated by the heater is circulated in the circulation passage by the hot air blower to dry the clothes in the inner tub. During the heating operation, the air heated by the heater is heated by the hot air. The room is heated by blowing from the outlet with a blower.
JP 2002-273087 A

  However, in the washing and drying machine equipped with the heating function described above, resin is generally used for the parts near the air outlet, for example, when the main body of the washing machine that forms the air outlet and the louver that adjusts the wind direction are provided. The louver is in a relatively high temperature state with warm air during heating operation. In addition, even if the heating means (heater) and the blower fan (warm air blower) are stopped and the heating operation is finished, these parts continue to be in a high temperature state for a while due to the heat stored in these parts themselves. It will be cooled (heat dissipated) by leaving it alone.

  As described above, a part made of a resin material is left in a high temperature state for a long time, and when this is repeatedly performed, there is a possibility that deformation or deterioration occurs at an early stage. In addition, it is not preferable that the temperature is high after the end of the operation because it is unfavorable because it causes a sense of discomfort due to being hot when a person touches it. Therefore, it is desirable to cool these parts as soon as possible after the end of the heating operation.

  The present invention has been made in view of the circumstances described above, and an object of the present invention is to provide a washing and drying machine capable of cooling parts near the air outlet heated to a high temperature with warm air during the heating operation as quickly as possible after the completion of the heating operation. And

  In order to achieve the above object, a washing and drying machine according to the present invention includes a main body forming an outer shell, a water tank elastically supported in the main body, and a rotatable inside the water tank. A rotating tank used for drying; a circulation passage connected to an air inlet / outlet provided in the water tank; and a circulation passage capable of circulating air; and provided in the circulation passage; An introduction port that can be introduced into the circulation passage, a circulation fan that circulates and supplies air into the water tank, and a blowout port that is branched from the circulation passage and formed in the main body. A ventilation path that communicates with the circulation path, a damper device that is provided to switch the ventilation path between the circulation path and a closed state, and air that is introduced into the circulation path from the introduction port of the circulation path Heating means and warm In operation, a blower fan that blows air heated through the heating means from the ventilation path to the outside of the main body through the outlet, an evaporator and a condenser in the circulation passage, and a compressor And a heat pump having a refrigeration cycle with an expansion valve and functioning as air heating means for drying laundry, and control means for controlling washing washing, dehydration, drying operation, heating operation, etc. The control means switches the damper device during the heating operation so that the ventilation path is communicated with the circulation path, and drives the blower fan to warm the air introduced from the inlet through the heating means. It is weathered and blown out from the ventilation path through the air outlet, and when the heating operation is completed, the heating means is stopped, and the air blowing operation only by the air blowing fan is performed. Characterized in that the (first aspect of the present invention).

  According to the above-mentioned means, the ventilation path is communicated with the circulation path by switching the damper device, the air introduced from the introduction port by driving the blower fan is warmed by the heating means, and the outside (indoor ) Can be used for heating operation.

  Then, at the end of the heating operation, by stopping the heating means and executing the air blowing operation only, the parts near the hot air outlet in the high temperature state of the heating operation are forcibly cooled by the air blowing from the air blowing fan. Is done. Therefore, these parts can be cooled as soon as possible after the heating operation is completed, and if they are resin parts, premature deterioration or the like can be avoided, and the user feels uncomfortable when touched. Absent.

(First embodiment)
A first embodiment in which the present invention is applied to a drum-type washing / drying machine will be described below with reference to FIGS.
First, FIG. 1 shows an overall configuration of a washing and drying machine. A water tank 2 is disposed inside a main body 1 that forms an outer shell. A drum 3 serving as a rotating tank used for dehydration and drying is disposed.

The top plate 1a, front plate 1b and base plate 1c forming the main body 1 are made of resin, and the other side plates 1d and back plate 1e are made of metal.
Both the water tank 2 and the drum 3 have a cylindrical shape on the horizontal axis, and have respective openings 4 and 5 on the front end face (left side in the figure). Among these, the opening 5 of the drum 3 is for putting in and out the laundry (clothing), and the opening 4 of the water tank 2 surrounds it. The opening 4 of the aquarium 2 has a bellows 7 connected to an opening 6 for taking in and out the laundry formed on the front surface of the main body 1, and a door 8 is provided at the opening 6 of the main body 1 so that the door 8 can be opened and closed. It has been.

  A small hole 9 is formed in substantially the entire region of the peripheral side portion (body portion) of the drum 3 (only a part is shown). The small hole 9 functions as a water passage hole during washing and dehydration, and functions as a ventilation hole during drying. In addition, a plurality of baffles 10 for stirring the laundry are provided on the inner surface of the peripheral side portion of the drum 3.

In the water tank 2, a hot air outlet 11 is formed at an upper part of the front end surface, and a hot air inlet 12 is formed at an upper part of the rear end surface. In addition, a drain port 13 is formed at the rear part of the bottom of the water tank 2. The drain port 13 is connected to a drain valve 14 outside the water tank 2, and a drain hose 15 is connected to the drain valve 14. Thus, the water in the water tank 2 is discharged out of the main body 1.
One end of the rotary shaft 16 is connected and fixed to the center of the rear end surface (back surface) of the drum 3, and the other end is inserted through the center of the rear end surface of the water tank 2 so as to be rotatable. Has been. A large number of hot air introduction holes 17 are formed around the center of the rear end surface of the drum 3.

A motor 18 is attached to the rear end surface (back surface) of the water tank 2. The motor 18 is an outer rotor type, and in this case, is a brushless DC motor, and the rotor 20 is connected and fixed to the rotary shaft 16. With this configuration, the drum 3 is directly rotated by the motor 18 around the rotation shaft 16.
The water tank 2 is elastically supported on the bottom surface of the main body 1 by a plurality of suspensions 19 (only one is shown), and the support form is a horizontal axis in which the axial direction of the water tank 2 is the front and rear. Therefore, the drum 3 has the same shape.

  A mounting board 33 is disposed in the base plate 1 c of the main body 1, and a heat exchange duct 21 that constitutes a part of a circulation passage 30 described later is installed on the mounting board 33. A suction port 22 is formed in the upper part of the front end portion of the heat exchange duct 21. The suction port 22 is connected to the hot air outlet 11 of the water tank 2 through a bellows-like connection hose 23 and an exhaust duct 24. The exhaust duct 24 is piped so as to bypass the left front surface of the water tank 2.

  On the other hand, a casing 26 of a circulation fan 25 is connected to the rear end portion of the heat exchange duct 21. A discharge port 27 of the casing 26 is connected to the hot air inlet 12 of the water tank 2 via a bellows-like connection hose 28 and an air supply duct 29. The air supply duct 29 is piped so as to bypass the left side of the motor 18.

  Then, the connection hose 23, the exhaust duct 24, the heat exchange duct 21, the casing 26 of the circulation fan 25, the connection hose 28, the air supply duct 29, and the hot air outlet 11 and the hot air inlet 12 of the water tank 2 are connected in communication. As a result, the circulation passage 30 is configured to allow the air in the water tank 2 to circulate.

  The circulation fan 25 provided in the circulation passage 30 has a circulation fan 31 inside the casing 26. The circulation fan 31 is rotated by a motor 32 disposed outside the casing 26, and the air in the water tank 2 moves outside the water tank 2 through the circulation passage 30 as shown by solid arrows in the figure due to the air blowing action by the rotation. After circulation, air is returned to the water tank 2 again.

  Inside the heat exchange duct 21 in the circulation passage 30, an evaporator 34 is interposed on the upstream side of the circulating air that is the front part, and a condenser 35 is interposed on the downstream side of the circulating air that is the rear part. Although neither the evaporator 34 nor the condenser 35 is shown in detail in detail, the evaporator 34 and the condenser 35 are of a finned tube type in which a large number of heat transfer fins are arranged at a fine pitch on the refrigerant circulation pipe. Therefore, heat exchange is performed by circulating air flowing between the heat transfer fins as described later.

  The evaporator 34 and the condenser 35 constitute a heat pump 38 together with the compressor 36 and the expansion valve (particularly an electronic throttle valve or capillary tube) 37 shown in FIG. In the heat pump 38, the compressor 36, the condenser 35, the expansion valve 37, the evaporator 34, and the compressor 36 are cycle-connected in this order by a connection pipe 39 (refrigeration cycle), and the compressor 36 operates. Circulates the refrigerant to function as air heating means for drying the laundry (details will be described later). The compressor 36 is disposed outside the heat exchange duct 21 in the main body 1.

  Further, as shown in FIG. 1, the upper wall of the intermediate portion of the heat exchange duct 21, which is a portion between the portion where the evaporator 34 of the circulation passage 30 is disposed and the portion where the condenser 35 is disposed, An air inlet 40 in the main body 1 is formed, and an air inlet 41 for outside air is formed in the lower portion of the front plate 1 b of the main body 1. Thereby, the air outside the main body 1 (in the room where the washing / drying machine is installed) is taken into the main body 1 through the intake port 41 and air can be easily introduced into the circulation passage 30 from the introduction port 40. It becomes.

  The inlet 40 is provided with, for example, a PTC heater 42 as a heating means. The PTC heater 42 is for heating air introduced into the circulation passage 30 from the introduction port 40 during the heating operation described later.

  An air outlet 43 is formed slightly above the air inlet 41 of the front plate 1 b of the main body 1, and is configured to selectively communicate with the circulation passage 30. Specifically, an air passage 44 is provided by branching from a portion between the suction port 22 of the heat exchange duct 21 and the evaporator 34 constituting the circulation passage 30, and the other end of the air passage 44 is connected to the air outlet. It is in the structure which connected to 43.

  A damper device 45 is provided at a communication portion where the ventilation path 44 and the circulation path 30 are branched. Specifically, the upper end portion of the damper device 45 is supported by a support shaft 46 so as to be rotatable up and down, and is rotated by the power of a driving source such as a motor or an electromagnet not shown in FIG. As shown by a two-dot chain line and a solid line, the ventilation path 44 has a function of switching the circulation path 30 to a communication state and a blocking state.

  An exhaust port 47 is provided in the upper surface portion adjacent to the suction port 22 of the heat exchange duct 21 on the upstream side of the water tank 2 side from the portion where the evaporator 34 of the circulation passage 30 is disposed. This exhaust port 47 is simultaneously closed when the damper device 45 closes the suction port 22 side (when the ventilation path 44 is opened), and when the suction port 22 is opened (when the ventilation path 44 is closed). At the same time, a part of the circulating air is discharged into the main body 1 during the drying operation.

  Here, the function including the exhaust port 47 and the introduction port 40 will be described. As a feature of the refrigeration cycle, the amount of heat that the refrigerant of the refrigeration cycle has is increased by the fact that the heat radiation heat of the condenser 35 is superior to the cooling heat amount of the evaporator 34 and the temperature of the entire circulating air rises as the laundry is dried. There is a possibility that the pressure increases and the compressor 36 is overloaded. For this reason, an exhaust port 47 is provided on the upstream side of the evaporator 34 in order to discharge a part of the circulating air. And in order to supplement this discharge | emission of air, the said inlet 40 which replenishes the air in the main body 1 in the circulation channel | path 30 is provided. Therefore, the inlet 40 in the present embodiment is used for both uses of air introduction during heating operation as described above.

  Inside the ventilation path 44, a blower fan 48 including a crossflow fan is provided. The blower fan 48 blows air heated via the PTC heater 42 from the air passage 44 through the outlet 43 to the outside of the main body 1 as indicated by broken line arrows in the drawing. A louver 49 made of a resin material is provided immediately in front of the blower fan 48. The louver 49 has a semicircular arc shape along the blower fan 48, and a discharge port 49a is formed in a part of the arc surface. The louver 49 is rotated to change the direction of the air blown by the blower fan 48.

Here, a temperature sensor 50 for detecting the air sucked from the outside of the main body 1, that is, a room temperature, is provided at the peripheral portion of the intake port 41 inside the main body 1.
In addition, a temperature sensor 51 that detects the temperature of the air in the circulation passage 30 during the drying operation is provided in the air supply duct 29. In addition, a power supply system control unit 52, a display system control unit 53, a water supply valve 54, a water supply case 55, and a water supply hose 56 are provided in the upper part of the main body 1, and an upper part of the front plate 1b of the main body 1 is provided. An operation panel 61 is provided.

  As shown in the front view of FIG. 3, the operation panel 61 includes an operation unit 62, a display unit 63, a door lock display unit 64, and the like. 3A shows the “cooling” operation state, and FIG. 3B shows the “heating” operation state.

  The operation unit 62 includes a start / pause button 65 that can be pressed, a dial 66 for setting a time around the start / pause button 65 and a switch that can be pressed. The key group 67 (in FIG. 3, switch keys corresponding to the operation courses of “washing”, “washing”, “drying”, and “cold / hot air”). Then, when the start / pause button 65 is pressed, the selected driving course is started and the driving course being executed is paused. When the dial 66 is rotated by a predetermined angle, according to the amount of rotation, Time setting for air conditioning operation is possible.

  The switch key group 67 is configured such that when pressed, the light in the area of the pressed switch key is turned on. In the present embodiment, the operation of the “cold air / warm air” switch key 67a will be specifically described, and description of other switch keys will be omitted.

  That is, when the user does not drive the laundry and the user presses the “cold / hot air” switch key 67a once, the light 67b in the area in the switch key 67a is lit in blue, and the display unit The character “COOL” is lit and displayed on the screen 63, and the cooling operation (cold air operation) waiting state is set. When the start / pause button 65 is pressed in this state, the cooling operation is started. The character portion of “COOL” is lit and displayed (see FIG. 3A).

  On the other hand, when the user presses the “cold air / hot air” switch key 67a once again (that is, when the “cold air / warm air” switch key 67a is pressed twice) while waiting for setting of the cooling operation, The light 67b in the area in the switch key 67a is lit in red, the letter “HOT” is lit in the display 63, and the setting for the heating operation (warm air operation) is awaited. Subsequently, when the user turns the dial 66 by a predetermined angle to set a desired operation time and presses the start / pause button 65, the heating operation is started. While this heating operation is performed, the character portion of “HOT” on the display unit 63 is lit in red (see FIG. 3B).

  Note that information such as the amount of detergent, remaining time, reserved time, and current time is displayed on the display unit 63 when the laundry is being operated. The door lock display section 64 is lit when the door 8 is locked in a closed state by a door lock mechanism (not shown). Although not shown, the operation panel 61 is also provided with a power button, buttons for selecting “washing”, “rinsing”, “dehydration”, and “drying”.

  FIG. 4 is a schematic electrical configuration diagram showing a control device 71 including a power supply system control unit 52 and a display system control unit 53. The control device 71 is composed of, for example, a microcomputer, and controls the operation of the washing and drying machine in general, for example, various operation courses including air-conditioning operation, as well as other damper devices 45, refrigeration cycle, circulation fan 25, and the like. It functions as a control means for controlling the operation. An operation signal is input to the control device 71 from the operation unit 62 of the operation panel 61, and a water level detection signal is input from a water level sensor 72 provided to detect the water level in the water tank 2. In addition, temperature detection signals are input from the temperature sensor 50 and the temperature sensor 51, respectively.

  The control device 71 is based on the input of the above various signals and the control program stored in advance, the motor 18, the circulation blower 25, the compressor 36, the expansion valve 37, the damper device 45, the PTC heater 42, the blower fan 48, the water supply The valve 54 and the drain valve 14 are controlled via a drive circuit 73. Although not shown, when various setting operations are performed on the operation unit 62 or the like of the operation panel 61, the control device 71 displays a display corresponding to the operated content on the display unit 63, and a door lock. Control such as lighting of the display unit 64 is also performed.

  Further, the control device 71 stores the data shown in FIG. 6, that is, the data of the room temperature (° C.) detected by the temperature sensor 50 and the predetermined air blowing time (minutes), and the operation is controlled based on the data. The predetermined air blowing time is a time during which the air blowing operation by only air blowing is performed for the predetermined air blowing time after the completion of the heating operation. For example, when the room temperature detected by the temperature sensor 50 is 18 ° C., “2 minutes” is set and executed as the predetermined blowing time.

The basis of the control content shown in FIG. 6 is confirmed and determined by the following verification.
That is, in order to confirm the relationship between the blowing time of the air blown after the PTC heater 42 is stopped and the temperature of the resin parts (for example, the front plate 1b of the main body 1 and the louver 49) near the blower outlet 43, The temperature in the vicinity of the air outlet 43 with the passage of time was measured.

  FIG. 7 shows the result of the verification, and shows the result of determining the blowing temperature according to the room temperature so that the component temperature is equal to or lower than a predetermined temperature X ° C. (for example, 40 ° C.). The predetermined temperature X ° C. is a temperature for cooling the component temperature, and is set to 40 ° C. here. This is the temperature at which the user feels “hot” when the component temperature is 40 ° C. or higher. Therefore, the predetermined temperature X ° C. is set to 40 ° C. Thus, according to FIG. 7, it can be seen that in the case of room temperature A (10 ° C.), it takes 1 minute to reach the predetermined temperature X ° C. In addition, in the case of room temperature C (20 ° C.), it can be seen that it takes 2 minutes to reach the predetermined temperature X ° C. Similarly, it was found that 1.5 minutes were required at room temperature B (15 ° C.), 2.5 minutes were required at room temperature D (25 ° C.), and 3 minutes were required at room temperature E (30 ° C.).

Based on the verification results, the predetermined blowing time shown in FIG. 6 is 1 minute at room temperature 10 ° C. or lower, 1.5 minutes at room temperature 15 ° C. or lower, 2 minutes at room temperature 20 ° C. or lower, and 2.5 minutes at room temperature 25 ° C. or lower. The room temperature is set to 3 minutes above 25 ° C., and is controlled by the control device 71.
The flowchart in FIG. 5 will be described in detail in the following description of the operation.

Next, the operation of the washing / drying machine having the above-described configuration will be described in detail particularly for the heating operation.
In the washing / drying machine having the above-described configuration, when a normal laundry is operated, for example, when the switch key of the “washing / drying” course on the operation panel 61 for performing washing to drying is selected, the standard driving course starts. Is done. The outline of the “washing and drying” course will be described. First, a washing (washing and rinsing) operation is started. In this washing operation, the operation of supplying water into the water tub 2 is performed by the water supply valve 54, and then the motor 18 is driven to rotate the drum 3 alternately in both forward and reverse directions at a low speed.

  When the washing operation is completed, the dehydration operation is then started. In this dehydration operation, after the water in the water tank 2 is discharged, the drum 3 is rotated in one direction at a high speed. Thereby, the laundry in the drum 3 is centrifugally dehydrated.

  When the dehydration operation is completed, a drying operation is next performed. In this drying operation, as shown by a solid line in FIG. 1, the damper device 45 blocks the ventilation path 44 from the circulation path 30 and keeps the circulation path 30 in a communication state. In this state, the motor 32 of the circulation fan 25 is driven while rotating the drum 3 in both forward and reverse directions at a low speed. Then, an air flow is generated in the circulation passage 30 as indicated by a solid arrow in FIG. However, the air in the water tank 2 flows from the hot air outlet 11 into the heat exchange duct 21 through the exhaust duct 24 and the connection hose 23 of the circulation passage 30. At this time, the operation of the compressor 36 of the heat pump 38 is started.

  By the operation of the heat pump 38, the refrigerant is compressed by the compressor 36 to become a high-temperature and high-pressure refrigerant and flows to the condenser 35. Therefore, heat is exchanged with the air in the heat exchange duct 21, and as a result, the air in the heat exchange duct 21 is heated, and conversely, the temperature of the refrigerant is lowered and liquefied. The liquefied refrigerant is then decompressed through the expansion valve 37 and then flows into the evaporator 34 and vaporizes. Thereby, the evaporator 34 cools the air in the heat exchange duct 21. The refrigerant that has passed through the evaporator 34 returns to the compressor 36.

  As a result, the air flowing into the heat exchange duct 21 from the water tank 2 is cooled by the evaporator 34 and dehumidified, and then heated by the condenser 35 and warmed. Then, the hot air is supplied into the water tank 2 from the hot air inlet 12 through the connection hose 28 and the air supply duct 29, and is further supplied into the drum 3 from the hot air introduction hole 17.

The hot air supplied into the drum 3 deprives the laundry of moisture, and then flows into the heat exchange duct 21 from the hot air outlet 11 through the exhaust duct 24 and the connection hose 23.
In this way, the laundry in the drum 3 is dried by circulating air (hot air) between the heat exchange duct 21 having the evaporator 34 and the condenser 35 and the water tank 2.

  Next, a case where a heating operation is performed in order to heat the room in which the washing / drying machine is installed will be described with reference to FIGS. The heating operation according to the present embodiment includes two steps, that is, a heating operation step in which warm air from the PTC heater 42 and the blower fan 48 blows out from the outlet 43 and a blower operation step in which the air is blown only by the blower fan 48. .

First, the operation procedure until the heating operation is started will be described with reference to FIG. 3 along the flowchart of FIG.
When the user presses the “cold / hot air” switch key 67a of the operation panel 61 twice, the display unit 63 of the operation panel 61 is displayed with the letters “HOT” lit as shown in FIG. Then, the light 67b of the switch key 67a is lit in red. Then, when the user turns the dial 66 to set the heating operation time during which the PTC heater 42 generates heat and presses the start / pause button 65, the heating operation is started and the door 8 is locked. The door lock display section 64 is lit in red.

  As shown in the flowchart of FIG. 5, the control device 71 detects the room temperature with the temperature sensor 50 (step S1) and sets the operation time (predetermined air blowing time) corresponding to the room temperature (step S1). S2) In this case, a room temperature of 20 ° C. or lower is detected, and a predetermined air blowing time of 2 minutes is set and stored (see FIG. 6). Then, the PTC heater 42 is energized (step S3), the blower fan 48 is driven (step S4), and at the same time, the timer operation for the heating time is started (step S5). This heating operation process is performed until the predetermined heating time initially set by the dial 66 is reached (step S6).

  In this heating operation state, the control device 71 switches the damper device 45 shown in FIG. 1 to communicate with the circulation passage 30 side as shown by a two-dot chain line, and the discharge port 49a of the louver 49 is moved forward. 1 and the blower fan 48 is driven to introduce the air in the main body 1 into the circulation passage 30 from the introduction port 40, and the introduced air is warmed by the PTC heater 42. As described above, the air passes through the evaporator 34 (in this case, the evaporator 34 is in an inoperative state and the warmed air is not cooled), and is blown out from the ventilation path 44 through the outlet 43. At this time, the control device 71 rotates the circulation fan 31 in the forward direction so as to prevent the odor in the water tank 2 and the drum 3 from being discharged from the outlet 43, thereby keeping the water tank 2 in a pressurized state to prevent backflow and the odor. Trying to confine. In this case, the circulation fan 31 is controlled to rotate at a low speed so that the air volume of the blower fan 48 does not decrease.

  In FIG. 5, when the heating operation reaches a predetermined heating time (step S6: YES), the control device 71 stops the PTC heater 42 (step S7), stops the heating time timer (step S8), and Accordingly, the air blowing operation only by the air blowing fan 48 is continuously performed. In this air blowing operation, the control device 71 starts a timer operation for a predetermined air blowing time (step S9) and monitors whether or not the predetermined air blowing time set in step S2 has reached 2 minutes (step 2) (step S9). S10). During the air blowing operation, components such as the louver 49 near the air outlet 43 are forcibly cooled by the air blown by the air blowing fan 48.

  Eventually, when the predetermined air blowing time reaches 2 minutes (step S10: YES), the control device 71 stops the air blowing fan 48 (step S11) and stops the timer for the predetermined air blowing time (S12). When the heating operation is completed, the component temperature near the outlet 43 is cooled to 40 ° C. or less, which is the predetermined temperature X ° C., by the air blowing operation for 2 minutes.

Thus, according to the present embodiment, the following effects can be obtained.
During the heating operation, the damper device 45 is switched so that the ventilation path 44 communicates with the circulation path 30, the blower fan 48 is driven, and the air introduced from the introduction port 40 is warmed by the PTC heater 42 and blown from the ventilation path 44. Heating operation can be performed by blowing the air through the room 43 through 43.

  Then, at the end of the heating operation, the PTC heater 42 is stopped, and only the air blowing operation by the air blowing fan 48 is performed, so that the parts such as the louver 49 near the air outlet 43 are forced to be blown by the air blowing fan 48. To be cooled. Therefore, these parts can be cooled as soon as possible after the heating operation is completed, and early deterioration or the like can be avoided particularly in the case of resin parts. Further, the blowing operation time at which the temperature of the component is equal to or lower than the predetermined temperature X ° C. (see FIG. 7) is obtained and stored in advance according to the room temperature, and when the controller 71 reaches the predetermined blowing time, the blowing operation is performed. Since it is set to stop, the air blowing operation is not performed excessively, and the electricity cost can be reduced. In addition, since the parts can be cooled quickly, the user does not feel hot even when touched and does not give a sense of incongruity.

  Further, during the air blowing operation, the circulation fan 31 is rotated forward to confine the odor in the water tank 2 and the drum 3, so that the odor in the water tank 2 and the drum 3 can be prevented from spreading into the room. At this time, the circulation fan 31 is rotated at a low speed and, for example, by setting the air volume to be smaller than the air volume of the blower fan 48, it is possible to suppress the air volume of the blower fan 48 from being lowered.

(Second Embodiment)
FIG. 8 to FIG. 12 show the second embodiment of the present invention with respect to the above embodiment. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. State.

  The second embodiment is different in that a temperature sensor 81 for the air temperature is provided as shown in FIG. This temperature sensor 81 detects the air temperature during the air blowing operation of only the air blowing fan 48 after the heating operation is completed, and is located near the ventilation path 44 communicating with the circulation passage 30, for example, near the damper device 45. 34 on the upstream side. The vicinity of this ventilation path 44 is also exposed to warm air by the heating operation and is in a high temperature state, and the temperature sensor 81 detects the temperature of the air flowing through here.

  As shown in FIG. 9, the temperature detection signal of the temperature sensor 81 is input to the control device 71, and when it is detected that the blowing temperature has reached a predetermined temperature, the blowing operation is terminated. ing. Specifically, as shown in FIG. 12, predetermined blowing temperatures Y1 to Y5 corresponding to the room temperature are shown. When the air blowing temperature falls from the high temperature state and reaches a predetermined air blowing temperature Y1 to Y5 corresponding to the room temperature (A, B, C, D, E), the air blowing operation ends. The predetermined air blowing temperatures Y1 to Y5 are air temperatures required for cooling the component temperature in the vicinity of the air outlet 43 to the predetermined temperature X ° C. (40 ° C.) in the same manner as in the first embodiment after the operation after heating is completed. It is set according to the room temperature.

  Accordingly, from FIG. 12, in order to lower the component temperature near the outlet 43 to 40 ° C., at room temperature A (10 ° C.), the blowing temperature decreases and the blowing temperature Y 1 reaches 10 ° C. This is verified by this experiment. Similarly, in the case of room temperature C (20 ° C.), this is achieved when the blowing temperature Y3 reaches 20 ° C. Similarly, in the case of room temperature B (15 ° C), the blowing temperature Y2 is 15 ° C, in the case of room temperature D (25 ° C), the blowing temperature Y4 is 25 ° C, and in the case of room temperature E (30 ° C), blowing air. It shows that the temperature Y5 is achieved at 30 ° C., respectively.

Based on this verification result, the data shown in FIG. 11 indicates that the predetermined blowing temperature is 10 ° C. or less when the room temperature is 10 ° C. or less, 15 ° C. when the room temperature is 15 ° C. or less, 20 ° C. when the room temperature is 20 ° C. or less, and 25 The predetermined air temperature is controlled by the control device 71 based on detection of the air temperature by the temperature sensor 81.
The flowchart of FIG. 10 will be described in detail in the following description of the operation.

Next, the effect | action of the heating operation by the washing dryer with the said structure is described.
As shown in FIG. 10, the second embodiment is different in that steps P1 to P3 are provided. Therefore, steps S1, 3 to 8, and 11 are the same as the first embodiment. Yes.

  After starting the heating operation, the control device 71 detects the room temperature by the temperature sensor 50 (step S1) and sets a predetermined blowing temperature according to the room temperature (step P1), as shown in the flowchart of FIG. For example, when a room temperature of 20 ° C. is detected, a predetermined blowing temperature of 20 ° C. is set and stored (see FIG. 11).

Steps S3 to S8 are the same as those in the first embodiment, and a description thereof will be omitted.
In step S8, the timer operation of the heating time is stopped, and in the air blowing operation only by the air blowing fan 48, the control device 71 detects the air blowing temperature (step P2), and the predetermined air blowing temperature (set in step P1) (step P2). It is monitored whether or not the temperature has reached 20 ° C (step P3). During this air blowing operation, parts such as the louver 49 in the vicinity of the air outlet 43 are forcibly cooled by the air blown by the air blowing fan 48 and soon reach a predetermined air blowing temperature of 20 ° C. (step P3: YES). The control device 71 stops the blower fan 48 (step S11), thereby ending a series of heating operations, and by this blower operation, the component temperature near the outlet 43 is equal to or lower than a predetermined temperature X ° C of 40 ° C. Cooled to.

  In the above configuration, at the end of the heating operation, the resin parts near the air outlet 43 are forcibly cooled by blowing until the temperature reaches a predetermined temperature X ° C. (for example, 40 ° C.) or less at which deterioration does not occur. Cooling can be performed as soon as possible after the operation is completed, and early deterioration of resin parts can be avoided. Moreover, even if a person touches it, the hot feeling can be wiped away, and the user does not feel uncomfortable.

The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications and expansions are possible.
In the washing and drying machines of the first and second embodiments, the predetermined blowing time and the predetermined blowing temperature may be appropriately changed by changing the use environment of the washing and drying machine, the material of the resin parts, and the like.

  In the washer / dryer of the first and second embodiments, the refrigeration cycle is operated during the air blowing operation after the heating operation is completed instead of the heating time setting, and the air introduced from the inlet is cooled by the evaporator. The parts near the air outlet may be cooled early with the generated cold air. In this case, it is preferable that the air heated by the condenser is stored in the water tank by the forward rotation of the circulation fan.

In the washing and drying machines of the first and second embodiments, the room temperature may be detected by a room temperature sensor before heating, and heating may be performed until the room temperature reaches a predetermined room temperature.
In the washing / drying machine of the first embodiment, the room temperature may be detected and the air blowing time may be set after the heating operation and before the air blowing operation.
The present invention is not limited to a drum-type washing / drying machine, and can be implemented with appropriate modifications within a range not departing from the gist of the present invention, such as being applicable to a washing / drying machine having a rotating shaft around a vertical axis.

1 is a longitudinal side view showing the overall configuration of the first embodiment of the present invention. Cycle diagram of heat pump It is a front view of an operation panel, (a) is a cooling operation state, (b) is a figure for demonstrating a heating operation state, respectively. Electrical configuration diagram Flow chart showing control contents during heating operation Figure showing data of room temperature and predetermined blowing time The figure which shows the relationship between the temperature near the outlet and the blowing time FIG. 1 equivalent view showing a second embodiment of the present invention. 4 equivalent diagram Figure equivalent to FIG. Data showing room temperature and predetermined air temperature The figure which shows the temperature change of the ventilation temperature according to room temperature

Explanation of symbols

  In the drawings, 1 is a main body, 2 is a water tank, 3 is a drum (rotary tank), 11 is a hot air outlet (entrance / exit), 12 is a hot air inlet (entrance / exit), 30 is a circulation passage, 31 is a circulation fan, and 34 is evaporation. , 35 is a condenser, 36 is a compressor, 37 is an expansion valve, 38 is a heat pump, 40 is an inlet, 42 is a PTC heater (heating means), 43 is an outlet, 44 is an air passage, 45 is a damper device, 48 is a blower fan, 49 is a louver, 71 is a control device (control means), and 50 and 81 are temperature sensors.

Claims (3)

A body forming an outer shell;
A water tank elastically supported in the body;
A rotating tub provided rotatably in the water tub and used for washing, dehydrating and drying laundry,
A circulation passage that is connected to an air inlet / outlet provided in the water tank and allows air to circulate;
An inlet that is provided in the circulation passage and allows air in the main body to be introduced into the circulation passage;
A circulation fan provided in the circulation passage for circulatingly supplying air into the water tank;
An air passage formed by branching from the circulation passage and communicating with the air outlet formed in the main body;
A damper device provided to switch the ventilation path to a communication state and a blocking state with respect to the circulation passage;
Heating means for heating air introduced into the circulation passage from the introduction port of the circulation passage;
A blower fan that blows air heated through the heating means from the ventilation path to the outside of the main body through the air outlet during heating operation;
A heat pump interposing an evaporator and a condenser in the circulation passage, and having a refrigeration cycle having a compressor and an expansion valve, and functioning as air heating means for drying laundry;
In what is provided with a control means for controlling washing, dehydration, drying operation and heating operation of the laundry,
The control means switches the damper device during heating operation so that the ventilation path communicates with the circulation path, and drives the blower fan to warm the air introduced from the inlet through the heating means. The washing and drying machine is characterized in that air is blown out from the air passage through the air outlet, and at the end of the heating operation, the heating means is stopped, and the air blowing operation is performed only by the air blowing fan. It has a temperature sensor that detects room temperature,
2. The washing / drying machine according to claim 1, wherein the operation time is set in accordance with the room temperature detected by the temperature sensor in the air-only operation. It has a temperature sensor that detects the air temperature during air-only operation.
The washing / drying machine according to claim 1, wherein when the temperature sensor detects a predetermined temperature set in advance, the blower fan is stopped.

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