JP2003093781A - Washing-and-drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve detection accuracy of the end of drying for realizing reduction in a drying time and effective drying performance in a washing-and- drying machine sequentially controlling a series of processes of washing, rinsing, spin-drying, and drying. SOLUTION: A cooling means is constructed of a water supply valve 31 and a cold water hose 33 for supplying water to cool down hot air inside a heat exchanger 32 and a cooling blower 34 blowing air to cool down the outside wall of the heat exchanger 32. A temperature difference during the drying process is measured by means of a thermistor 36 installed to the outside wall surface of the heat exchanger 32 and a thermistor 37 detecting a circulated air temperature in an outlet. When the temperature difference reaches a certain set value, a control means 38 carries out drying end detection. In the control means, a difference temperature set value is set according to an ambient temperature, and then, the difference temperature set value is reset according to a temperature during the drying process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer / dryer for sequentially controlling a series of steps of washing, rinsing, dehydrating and drying.

[0002]

2. Description of the Related Art Conventionally, a structure as shown in FIG. 5 has been proposed for this type of washer / dryer. The configuration will be described below.

As shown in FIG. 5, a casing 1 has an outer tub 3 elastically suspended therein by a plurality of suspensions 2.
Is provided, and the vibration during dehydration is absorbed by the suspension 2. Inside the outer tub 3, an inner tub 4 for accommodating laundry and an object to be dried is rotatably arranged around a washing / dehydrating shaft 5 having a hollow double structure, and the inner tub 4 is provided at the inner bottom of the inner tub 4. A rotary blade 6 that stirs clothes (laundry or an object to be dried) is rotatably arranged.

Further, a large number of small holes (not shown) are provided on the inner peripheral wall of the inner tank 4, and a fluid balancer 7 is provided above. By forming the stirring protrusion 9 on the upper surface of the substantially dish-shaped base having the inclined surface 8 on the outer peripheral portion of the rotary blade 6, the object to be dried is tilted by the centrifugal force generated by the rotation of the rotary blade 6 in the drying process. It is easy to soar upward along the surface 8.

The motor 10 is attached to the bottom of the outer tank 3,
It is connected to the inner tub 4 or the rotary blades 6 via the clutch 11 for switching the transmission of the rotational force to the washing / dehydrating shaft 5 at the time of washing or dewatering and the washing / dewatering shaft 5.

The heat exchanger 12 is for dehumidifying the circulating moist hot air, and has a lower bellows-shaped hose 13 whose one end is extendable.
Is connected to the lower part of the outer tub 3 via the
4 is connected to one end. The other end of the drying blower 14 is
It is connected to a hot air supply passage 16 having a heater 15 which is a heating means, and is connected to the inner tank 4 through an upper bellows-shaped hose 17,
A circulating hot air circulation path 18 is configured. The drying blower 14 and the heater 15 form a warm air blower.

The outer tub 3 is provided with an outer tub cover 19 which covers the upper surface of the outer tub 3 in an airtight manner. The outer tub cover 19 is provided with a hot air blowout hole 20 from a retractable upper bellows-shaped hose 17. It is open. An inner lid 21 is provided on the outer tub cover 19 so as to be openable and closable so that clothes can be taken in and out.

The casing cover 22 covers the upper portion of the casing 1, has an opening / closing lid 23 that can be freely opened and closed, is provided with operation display means 24, and is provided with a water supply valve 25 for supplying water to the inner tank 4. A drain valve 26 for draining water into the outer tub 3 is provided at the bottom of the outer tub 3. The cooling blower 27 is attached to the side surface of the housing 1, and the outer tub 3 inside the housing 1 and the heat exchanger 12 are installed.
It is configured so that air can be blown to cool such items.

The control device 28 has a microcomputer, and has a motor 10, a clutch 11 and a drying blower 1.
4, the heater 15, the water supply valve 25, the drain valve 26, the cooling blower 27, and the like are controlled to sequentially control a series of steps of washing, rinsing, dehydration, and drying.

The thermistor 29 detects the temperature of the heat exchanger 12 or the outer wall of the outer tank 3, and the thermistor 30 detects the temperature of the circulating air at the outlet of the heat exchanger 12.
The control device 28 is configured to input the detection outputs from the thermistors 29 and 30 and determine the end of drying.

The operation of the above configuration will be described. In the washing process, when the opening / closing lid 23 and the inner lid 21 are opened, clothes (laundry) are put into the inner tub 4, and the operation is started, the water supply valve 25 is opened to supply water to a predetermined water level, and then the motor 10 is driven. To do. At this time, the power of the motor 10 is transmitted to the rotary blades 6 via the washing shaft by the clutch 11 of the transmission mechanism section, and the rotary blades 6 rotate, whereby the stirring projections 9 of the rotary blades 6 stir the clothes. , The mechanical force acting by contact between the laundry items, or the inner wall of the inner tub 4 or the contact with the rotary blades 6, and the water flow force.

In the dehydration step, after the washing is completed, the drain valve 26 is opened to drain the water in the inner tub 4, and then the clutch 11 of the transmission mechanism is switched to the dehydration side so that the power of the motor 10 is passed through the dehydration shaft. This is performed by transmitting water to the inner tub 4 and rotating it to give centrifugal force to clothes, thereby separating water from clothes.
When the dehydration process ends, the drying process continues.

In the drying process, the clutch 11 is switched to the washing side and the motor 10 is driven to transmit it to the rotary blades 6,
By rapidly rotating the rotor blade 6 in the normal direction and reversing it, the clothes attached to the inner wall of the inner tank 4 are peeled off after dehydration. Next, the drain valve 26 is closed, the rotary blades 6 are normally rotated and inverted, and the clothes are hooked by the agitating protrusions 9 and agitated, while the drying blower 1 is used.
The warm air is sent to the warm air ejection holes 20 by the warm air blowing means composed of the heater 4 and the heater 15. The hot air blown into the inner tub 4 from the warm air outlet 20 evaporates the moisture from the clothes, then flows from the inner tub 4 to the inside of the outer tub 3, and then passes through the lower bellows-shaped hose 13. It reaches the heat exchanger 12.

Warm air that removes moisture from clothes and contains moisture
While passing through the inner wall of the outer tub 3 and the inside of the heat exchanger 12, the outer tub 3 and the outer wall of the heat exchanger 12 are cooled by the inflow of external air by the cooling blower 27 installed on the side surface of the housing 1. As a result, dew condensation of moisture occurs inside, and the moist warm air is dehumidified and returns to the drying blower 14. By circulating hot air through the hot air circulation path 18, the clothes in the inner tub 4 can be dried.

Here, in the case of the water cooling system, water is sprinkled into the heat exchanger by a cold water hose connected to a part of the heat exchanger from a water supply valve, whereby dew condensation of water occurs inside the heat exchanger. , The moist warm air is dehumidified and returns to the blower for drying. By circulating hot air in this hot air circulation path,
The clothes in the inner tank 4 can be dried (not shown).

By the way, the temperature of the circulating air in the drying process is
It changes as shown in FIG. That is, as shown in FIG. 6, when drying is started, the temperature of the clothes exposed to the warm air rises (preheating period T1), and eventually the heat input of the heater 15 and the heat quantity of the latent heat of vaporization of water contained in the clothes are The transfer is in a dry state with a balanced balance. This period T2 is called a constant rate dry period.

When the drying process further progresses and the water content contained in the surface of the clothes finishes evaporating, the water content contained in the fibers begins to evaporate. This period T3 is called a rate-decreasing dry period, and since the amount of evaporated water is small with respect to the heating input of the heater 15, the surplus heating input raises the temperature of clothes and circulating air as sensible heat. The point at which the temperature starts rising is called the inflection point A.

The drying rate of the clothes at this time is about 90 to 95%.
The control device 28 determines the inflection point A from the rate of change of the temperature TH2 detected by the thermistor 29 and the temperature TH1 detected by the thermistor 30, provides a predetermined delay time, and then performs a drying process after sufficiently drying. To finish.

[0019]

However, in such a conventional structure, the air cooling system for indirectly cooling the hot air circulating in the heat exchanger 12 by the outside air is indirect and therefore has a low cooling capacity. Therefore, when the outside temperature is high, it is difficult to secure the dehumidification rate, the temperature difference is hard to occur, and the drying time is long. On the contrary, if the outside air temperature is low, a difference in temperature is likely to occur and the temperature may be detected early, and there is a possibility that the process may be finished without being dried.

In the water cooling system in which the hot air circulating in the heat exchanger 12 is directly cooled by water, the cooling capacity is lowered when the water temperature is high, and the drying time is long.

Also, in the rate-decreasing dry period of the drying process, the clothes are agitated by the rotary blades 6 and the warm air is evenly applied to the clothes to dry them, but the agitation process of the clothes becomes longer, and the clothes of thin plain weave cotton cloth In the finished product after drying, many wrinkles and entanglements occur, and the clothes are agitated by the rotary blades 6 and the warm air is evenly applied to the clothes to dry them, but the agitation process of the clothes becomes longer, and a thin plain weave A lot of wrinkles and entanglements occur in the finish of clothes after drying, the circulating air temperature rises as the drying progresses, and in clothes that are easy to dry such as synthetic fibers, it is too dry and causes wrinkles and scratches. Was a problem in terms of.

Further, in the drying process, not only the air cooling method and the water cooling method but also the running cost is required to be further reduced from the market.

The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to improve the performance of detecting the completion of drying due to a temperature difference, to effectively shorten the drying time, and to obtain an effective drying performance.

[0024]

In order to solve the above-mentioned problems, the washing and drying machine of the present invention has an outer tub elastically suspended in a housing and a rotation center axis in the vertical direction. An inner tank rotatably supported in the outer tank, a rotary blade rotatably provided on the inner bottom portion of the inner tank, a drive means for driving the inner tank or the rotary blade, and warm air in the inner tank. Warm air blowing means for blowing air, water supply means for supplying water into the inner tank, a warm air circulation path for circulating warm air by the warm air blowing means, and a warm air inside the heat exchanger A cooling means having at least one of a water cooling means for cooling the supply water and an air cooling means for cooling the outer wall of the heat exchanger with air, and a temperature detecting means for the warm air circulation path and the outer wall of the heat exchanger or the outer tank. Is provided to operate the driving means, the warm air blowing means, the cooling means, the temperature detecting means, etc. And a control means for controlling the steps such as washing, rinsing, dehydration, and drying, wherein the control means controls the temperature of the circulating air in the warm air circulation path and the heat exchanger by the temperature detecting means in the drying step. Drying completion detection is performed when the temperature difference between the outer wall temperature or the outer tank temperature reaches a predetermined temperature difference set value, and the difference corresponding to the outer wall temperature or the outer tank temperature of the heat exchanger immediately before the drying process is detected. The temperature setting value is set.

As a result, it is possible to improve the performance of detecting the completion of drying due to the temperature difference, efficiently reduce the drying time, and obtain effective drying performance.

[0026]

The invention according to claim 1 is, in a washing and drying machine, an outer tub elastically suspended in a housing and a central axis of rotation in a vertical direction, which is rotatable in the outer tub. , An inner tank supported on the inner tank, a rotary blade rotatably provided on the inner bottom portion of the inner tank, a driving means for driving the inner tank or the rotary blade, and a warm air blowing means for blowing warm air into the inner tank. A water supply means for supplying water into the inner tank, a warm air circulation path having a heat exchanger for circulating warm air by the warm air blowing means, and a water cooling means for supplying and cooling the hot air in the heat exchanger. And a cooling means having at least one of air cooling means for cooling the outer wall of the heat exchanger by blowing air, and a temperature detecting means provided on the warm air circulation path and the outer wall of the heat exchanger or the outer tub, and the driving means. , Control the operation of hot air blowing means, cooling means, temperature detection means, etc. And a control means for controlling a process such as drying, dehydration, and drying, wherein the control means controls the temperature of the circulating air in the warm air circulation path and the outer wall temperature of the heat exchanger or the outer tank by the temperature detecting means in the drying process. When the temperature difference with the temperature reaches the specified temperature difference set value, the end of drying is detected, and the temperature difference set value is set according to the outer wall temperature or the outer tank temperature of the heat exchanger immediately before the drying process. Is what
It is possible to improve the performance of detecting the completion of drying due to the difference in ambient temperature, prevent undrying due to premature termination of detection of completion of drying at low temperatures, and efficiently reduce the drying time at high temperatures.

According to a second aspect of the present invention, in the invention according to the first aspect, the control means is such that the outer wall temperature or the outer bath temperature of the heat exchanger at the elapse of a predetermined time of the drying process or at the end of the constant rate drying period. In order to improve the drying time efficiently by improving the drying end detection performance according to changes in the drying process due to installation conditions and atmospheric temperature differences Shortening can be realized.

According to a third aspect of the present invention, in the second aspect of the invention, the control means provides a temperature range of a plurality of stages in the outer wall temperature or the outer bath temperature of the heat exchanger immediately before the drying process, The differential temperature setting value for dry end detection is reset for each temperature range, and the dry end detection performance is improved and the drying time is effectively shortened according to changes during the drying process due to installation conditions and atmospheric temperature differences. Therefore, it is possible to secure the drying time and the drying performance which are less changed under any conditions.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

(Embodiment 1) As shown in FIG. 1, a water supply valve 3
In the first embodiment, a water supply valve for washing which supplies water into the inner tub 4 in the washing and rinsing process and a water supply valve for drying which supplies water to the heat exchanger 32 in the drying process are integrally configured, and the heat exchanger 32 is passed through the cold water hose 33. Water supply valve 31 and cold water hose 3
The water-cooling means for cooling the heat exchanger 32 is constituted by 3 and. Further, the cooling blower 34 cools the surface of the heat exchanger 32 and constitutes an air cooling means.

The heat exchanger 32 has one end connected to the lower portion of the outer tub 3 via a stretchable lower bellows-shaped hose 13 and the other end connected to one end of a drying blower 14. The other end of the drying blower 14 is connected to a warm air supply passage 16 having a heater 15 as a heating means, is connected to the inner tank 4 through an upper bellows-shaped hose 17, and constitutes a warm air circulation passage 35 for circulation. ing.

The thermistor 36 is attached to the outer wall surface of the heat exchanger 32 (the thermistor 36 may be the outer wall surface of the outer tank 3 and will be referred to as a heat exchanger hereafter) to detect the temperature of the outer wall of the heat exchanger 32. The thermistor 37 is the heat exchanger 3
The temperature of the circulating air at the outlet of 2 is detected.

The control device (control means) 38 includes a microcomputer, and has a motor (driving means) 10, a clutch 11, a drying blower (warm air blowing means) 14, a heater (warm air blowing means) 15, a drain valve. 26, the water supply valve 31, the cooling blower 34, and the like to control the operations of washing, rinsing, dehydrating, and drying, and at the same time, the thermistor 36.
Based on the temperature detected by the thermistor 37 and the temperature of the circulating air in the warm air circulation path 35 and the outer wall temperature of the heat exchanger 32, the drying is completed.

The operation of the above configuration will be described. In addition,
Since the operation from the washing process to the dehydration process is the same as the operation of the conventional example, description thereof will be omitted.

In the drying process, the clutch 11 is switched to the washing side to drive the motor 10 to transmit it to the rotary blades 6,
By rapidly rotating the rotor blade 6 in the normal direction and reversing it, the clothes attached to the inner wall of the inner tank 4 are peeled off after dehydration. Next, the rotor 6 is rotated in the normal direction and reversed, and the clothes are hooked by the agitating protrusions 9 to agitate the clothes, while hot air is blown out by the hot air blowing means composed of the drying fan 14 and the heater 15. Send to 20. The warm air blown into the inner tank 4 from the warm air outlet 20 is
After evaporating water from the clothes, the water flows from the inner tub 4 to the inner side of the outer tub 3, and then passes through the lower bellows-shaped hose 13 to reach the heat exchanger 32.

When the warm air, which has been dehumidified by removing moisture from clothes, passes through the heat exchanger 32, it is heat-exchanged through the wall surface of the heat exchanger 32 by the air blown by the cooling blower 34. The warm air that has been cooled and reached the dew point forms dew condensation water on the inner wall surface of the heat exchanger 32.

At this time, at the same time, about 0.4 liters of cooling water (tap water) was supplied per minute from the water supply valve 31 into the heat exchanger 32 through the cold water hose 33, and the water was supplied into the heat exchanger 32. The cooling water hits the step 39 and is reflected as a splash. When the droplets are exposed to high-humidity warm air, they are cooled and heat-exchanged at the same time, and similarly condensed water is formed. The condensed water is discharged to the outside of the machine through the drain valve 26 together with the cooling water.

In this way, the high-humidity hot air is cooled in the heat exchanger 32 by the cooling blower 34 and the cold water hose 3 is used.
It is dehumidified by heat exchange with the water cooling by the cooling water that is sent through 3, and then returns to the drying blower 14. By circulating the warm air through the warm air circulation path 35 in this manner, the clothes in the inner tub 4 can be dried.

FIG. 2 shows the thermistor 37 in the drying process.
Represents the detected temperature TH1, the detected temperature TH2 detected by the thermistor 36, and the temperature difference TH1-TH2 between the detected temperature TH1 and the detected temperature TH2. The change in the state of the warm air circulation path 35 with the progress of the drying process will be described based on FIG.

In the constant rate drying period T2 shown in FIG. 2, the amount of water vaporized from clothes is constant (equilibrium state), the cooling effect of the cooling air and cooling water is spent on the state change of condensation, and the heat exchanger 32 is used. The wall temperature of remains in equilibrium.
Therefore, the detection temperature TH2 of the thermistor 32 that detects the wall surface temperature of the heat exchanger 32 also shows a constant value.

Further, in the rate-decreasing drying period T3 in which the amount of water vaporized from clothes is gradually reduced by the progress of drying and the temperature of the warm air is increased, the relative humidity (water content) of the warm air is gradually decreased. Therefore, the amount of heat exchanged for condensation on the wall surface of the heat exchanger 32 also decreases. Therefore, in the heat exchanger 32, the wall surface of the heat exchanger 32 starts to be cooled by the air cooling by the cooling blower 34 and the water cooling by the cooling water sent through the cold water hose 33, and as a result, the wall temperature of the heat exchanger 32 decreases. Come on.

The thermistor 36 detects a change in the state of the wall surface of the heat exchanger 32. Furthermore, the temperature TH1 is detected by the thermistor 37 from the constant rate drying period T2 of the circulating air to the decreasing rate drying period T3, and the thermistor 36 is detected.
The inflection point can be determined more clearly by taking the difference from the detected temperature TH2 of the above, and there is a slight delay after the temperature difference between TH1 and TH2 reaches the preset drying end detection set value B. Allow time and allow it to dry before ending the drying process.

In such a dry end detection, as shown in FIG. 3, the behaviors of TH1 and TH2 differ depending on the difference in atmospheric temperature. That is, when the ambient temperature is high, it becomes TH1-H and HT2-H, and when it is room temperature, TH1-H and HT2-H.
M, TH2-M, and TH1-L, TH at low temperatures
2-L. This allows TH to detect the end of drying.
If the temperature difference between 1 and TH2 also changes and the drying end detection of the temperature difference is set to a constant temperature difference set value, the lower the ambient temperature, the more easily the temperature difference occurs (dashed line), and the time is short. On the other hand, the higher the temperature, the more difficult it is for the temperature difference to occur (broken line), and the longer time it may dry. Therefore, in the present embodiment, the TH2 temperature immediately before the drying process is set as the ambient temperature by the thermistor 36 provided on the outer wall surface of the heat exchanger 32, and as shown in (Table 1), the temperature difference setting for detecting the completion of drying is set according to the ambient temperature. By setting the values to CL, CM and CH respectively, it is possible to keep the time of T3 almost constant, prevent undrying due to premature detection of the end of drying at low temperature, and reduce the drying time at high temperature. It can be effectively shortened.

[0044]

[Table 1]

In this embodiment, the high-humidity hot air circulating in the hot-air circulation path 35 is cooled and dehumidified by air cooling by the cooling blower 34 and water cooling by the cooling water sent through the cold water hose 33. However, by configuring either or both of them to be turned on and off at any time during the drying process, it is possible to select an effective cooling method according to the drying process, and to achieve high performance. Dehumidification performance can be secured.

(Embodiment 2) The structure is the same as that of Embodiment 1 shown in FIG.

The operation of the above configuration will be described with reference to FIG. FIG. 4 shows the temperature TH1 detected by the thermistor 37 and the temperature TH2 detected by the thermistor 36 in the initial stage of drying.
And the temperature difference between TH1 and TH2.

TH1 and TH2 are different depending on the condition of installing the washer / dryer, for example, in a wide open state, that is, in a normal installation (broken line) and in a closed state in a small room, that is, in a closed state (solid line). . When the installation space is closed, the temperature inside the machine slightly rises due to the thermal energy of the warm air heated by the heater 15 in the drying process during the drying process, so the temperature at the end of T2 rises slightly and the rate-decreasing drying period T3. In this case, since the temperature of the air cooling by the cooling blower 34 itself becomes high, the lowering level becomes slightly gentle and the difference in temperature between TH1 and TH2 for detecting the completion of drying also becomes moderate.

Therefore, TH2 at the time when a predetermined time elapses in the drying process or at the end of the constant rate drying period T2 in the drying process.
The temperature difference set value of TH1-TH2 for the detection of the completion of drying is reset depending on the temperature. For example, when the TH2 temperature is high at the end of the constant rate drying period T2, the time T3 can be kept substantially constant by lowering the differential temperature setting value for the detection of drying completion from the normal differential temperature setting value. Therefore, the drying time can be effectively shortened even when the installation space is closed.

(Embodiment 3) The configuration is the same as that of Embodiment 1 shown in FIG.

The operation of the above configuration will be described with reference to FIGS. 3 and 4. FIG. 3 and FIG. 4 show the temperature difference TH1 detected by the thermistor 37 and the temperature difference TH2 detected by the thermistor 36 and TH1-TH2 at the initial stage of drying.

It can be seen that it easily varies depending on the conditions for installing the washer / dryer (explained in Example 2), the room temperature (explained in Example 1), the season and the water temperature.

In the case of clothes that are easy to dry, such as clothes made of synthetic fibers or thin plain weave cotton, the temperature easily rises,
Since the temperature at the end of T2 becomes slightly higher and the temperature difference between TH1 and TH2 for detecting the end of drying also changes slowly, the drying time tends to become longer.

[0054]

[Table 2]

Therefore, as shown in (Table 2), the above-mentioned temperature difference for completion of drying is detected in accordance with the outer wall temperature or the outer tank temperature of the heat exchanger when a predetermined time has elapsed in the drying process or at the end of the constant rate drying period. A set value (for example, CL, CM and CH) is set, and a plurality of temperature ranges (for example, DT and DH) are provided at the outer wall temperature or the outer tank temperature of the heat exchanger immediately before the drying process, and the corresponding drying is performed. The temperature difference setting value of TH1-TH2 for end detection is configured to be reset (temperature detection and drying end detection are the same as in Examples 1 and 2). In other words, the drying end detection performance can be improved and the drying time can be effectively shortened according to changes in the drying process due to installation conditions and atmospheric temperature differences, and drying time and drying performance with little change under any conditions can be achieved. Can be secured. Also, since the drying time is shortened, the clothes are stirred by the rotary blades 6 in the drying rate reduction period in the drying process, and the warm air is evenly applied to the clothes to dry them. Cotton clothes and the like have many wrinkles and entanglements in the finished product after drying, and the clothes are agitated by the rotary blades 6 and the warm air is evenly applied to the clothes to dry them, but the agitation process of the clothes becomes longer,
Clothing such as thin plain weave cotton cloth often has wrinkles and entanglements in the finished product after drying, and the circulating air temperature rises as the drying progresses. It will also be possible to meet the requirements of quality and performance.

The drying process is not limited to the air-cooling system and the water-cooling system, but the running cost can be further reduced by shortening the drying time.

[0057]

As described above, according to the invention of claim 1, the outer tub elastically suspended in the housing and the central axis of rotation in the vertical direction are rotatably provided in the outer tub. A supported inner tank, a rotary blade rotatably provided on the inner bottom portion of the inner tank, a driving means for driving the inner tank or the rotary blade, and a warm air blowing means for blowing warm air into the inner tank. A water supply means for supplying water into the inner tub, a hot air circulation path having a heat exchanger for circulating warm air by the warm air blowing means, and a water cooling means for supplying and cooling the hot air in the heat exchanger A cooling means having at least one of air cooling means for cooling the outer wall of the heat exchanger by blowing air, a temperature detecting means provided on the warm air circulation path and the outer wall of the heat exchanger or the outer tank, and the driving means, Controls the operation of warm air blowing means, cooling means, temperature detecting means, etc. to wash, rinse, and remove , And control means for controlling the stroke of such drying, wherein, in the drying step,
When the temperature difference between the circulating air temperature of the warm air circulation path and the outer wall temperature of the heat exchanger or the outer tank temperature reaches a predetermined temperature difference set value by the temperature detecting means, the end of drying is detected. Since it is configured to set the differential temperature set value corresponding to the outer wall temperature or the outer tank temperature of the heat exchanger immediately before,
It is possible to improve the performance of detecting the completion of drying due to the difference in ambient temperature, prevent undrying due to premature termination of detection of completion of drying at low temperatures, and efficiently reduce the drying time at high temperatures.

According to the second aspect of the present invention, the control means dries in accordance with the outer wall temperature or the outer bath temperature of the heat exchanger at the time when a predetermined time of the drying process elapses or when the constant rate drying period ends. Since the temperature difference setting value for end detection is reset, the end-of-drying detection performance is improved and the drying time is shortened efficiently according to changes in the drying process due to installation conditions and atmospheric temperature differences. Can be realized.

According to the third aspect of the present invention, the control means provides a plurality of temperature ranges in the outer wall temperature or the outer tank temperature of the heat exchanger immediately before the drying process, and performs drying for each temperature range. Since it is configured to reset the differential temperature setting value for end detection, it is possible to improve the dry end detection performance and efficiently reduce the drying time according to changes in the drying process due to installation conditions and atmospheric temperature differences. It is possible to secure a drying time and a drying performance with little change under any conditions.

As the drying time becomes shorter, the clothes are stirred by the rotary blades 6 in the rate-decreasing drying period in the drying process,
Warm air is evenly applied to the clothes to dry them, but the agitation process of the clothes becomes longer, and clothes such as thin plain weave cotton fabrics have many wrinkles and entanglements in the finished product after drying.
Stir the clothes with a dry cloth and apply warm air to the clothes to dry them. The temperature rises with the progress of drying, and for clothes that are easy to dry such as synthetic fibers, it is possible to take measures in terms of quality and performance, which may cause wrinkles and damage due to overdrying.

The drying process is not limited to the air-cooling system and the water-cooling system, but the running cost can be further reduced by shortening the drying time.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a washer / dryer according to a first embodiment of the present invention.

[Fig. 2] Operation time chart in the drying process of the washing and drying machine

FIG. 3 is an operation time chart for each ambient temperature in the drying process of the washing and drying machine.

[Fig. 4] Operation time chart for each installation environment in the drying process of the washing and drying machine

FIG. 5 is a vertical sectional view of a conventional washer / dryer.

FIG. 6 is an operation time chart in a drying process of a conventional washer / dryer.

[Explanation of symbols]

1 case 3 outer tank 4 inner tank 6 rotors 10 Motor (driving means) 14 Drying blower (warm air blower) 15 Heater (warm air blowing means) 31 Water supply valve (water supply means, water cooling means) 32 heat exchanger 33 Cold water hose (water cooling means) 34 Cooling blower (air cooling means) 35 Warm air circulation path 38 Control device (control means)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Sakin             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 3B155 AA10 AA16 BB15 BB16 CA06                       CB07 CB53 CB55 KA27 LB02                       MA01 MA02 MA07

Claims (3)

[Claims] 1. An outer tank elastically suspended in a housing, an inner tank having a central axis of rotation in a vertical direction and rotatably supported in the outer tank, and an inner bottom portion of the inner tank rotatable. A rotary blade provided in the inner tank, a drive means for driving the inner tank or the rotary blade, a warm air blowing means for blowing warm air into the inner tank, a water supply means for supplying water into the inner tank, and a heat exchanger. At least one of a hot air circulation path for circulating hot air by the warm air blowing means, a water cooling means for supplying and cooling the hot air in the heat exchanger and an air cooling means for blowing and cooling the outer wall of the heat exchanger. A cooling means having one side and a temperature detecting means provided on the warm air circulation path and the outer wall of the heat exchanger or the outer tank, etc., to operate the driving means, the warm air blowing means, the cooling means, the temperature detecting means, etc. With control means to control and control the process of washing, rinsing, dehydration, drying, etc. When the temperature difference between the circulating air temperature of the warm air circulation path and the outer wall temperature of the heat exchanger or the outer tank temperature reaches a predetermined temperature difference set value by the temperature detecting means during the drying process. A washing / drying machine that detects the completion of drying and sets the differential temperature set value corresponding to the outer wall temperature or the outer tub temperature of the heat exchanger immediately before the drying process. 2. The control means resets the differential temperature set value for detection of completion of drying in accordance with the outer wall temperature or the outer tank temperature of the heat exchanger when a predetermined time has elapsed in the drying process or at the end of the constant rate drying period. The washer / dryer according to claim 1. 3. The control means sets a plurality of temperature ranges in the outer wall temperature or the outer bath temperature of the heat exchanger immediately before the drying process, and resets the differential temperature set value for detecting the completion of drying for each temperature range. The washer / dryer according to claim 2.