JP5387462B2 - Dehumidifier - Google Patents

Description

  The present invention relates to a dehumidifier that not only removes humidity in a room but also dries an object to be dried placed in the room.

  The original function of the dehumidifier is to "lower the humidity in the room", but in recent years, with the changes in the living system, the number of households doing laundry in the middle of the night has increased, and in the rainy weather or when pollen is scattered outside Since laundry cannot be dried, dehumidifiers are increasingly used for the purpose of “drying laundry that has been dried indoors”. However, conventional dehumidifiers are generally controlled by operating time and indoor humidity, and are not controlled to dry laundry placed indoors, so that the laundry is brought to an optimal dry state. There was a problem that was not possible.

  For example, the temperature detection means for detecting the temperature of the indoor air, the humidity detection means for detecting the humidity of the indoor air, and the temperature of the object to be dried are detected. Infrared detection means for detecting, control means for performing output control of the temperature detection means, the humidity detection means, detection processing of the detection results of the infrared detection means, and dehumidification means and blower means according to the detection results A dehumidifier has been devised, which uses an infrared detection means to scan the space where the object to be dried is scanned and measure the temperature distribution of the space where the object to be dried is disposed. The dehumidifier determines that the object to be dried has dried if the atmosphere temperature of the object to be dried is higher than the room temperature for a certain period of time (see, for example, Patent Document 1).

JP 2007-240100 A (0007 column)

  According to the above-mentioned Patent Document 1, it is determined that the object to be dried is dried if the atmosphere temperature of the object to be dried is higher than the room temperature for a certain period of time. Because the time from when the atmospheric temperature of the product becomes higher than the room temperature to the time of drying differs, for example, the material to be dried is overdried or the material to be dried has a slow drying speed. However, there is a problem that the operation of the dehumidifier ends with insufficient drying.

  Then, this invention is made | formed in order to solve the above subjects, and it is providing the dehumidifier which can detect the drying of to-be-dried material with a sufficient precision.

The dehumidifier according to the present invention includes a dehumidifying unit that removes moisture in the air passing therethrough, a blower unit that sucks indoor air and supplies dry air obtained by passing through the dehumidifying unit to the room, and the indoor unit. Indoor temperature detecting means for detecting the temperature of the air; indoor humidity detecting means for detecting the humidity of the indoor air; wind direction changing means for changing the blowing direction of the dry air; and surface temperature of a predetermined region including the object to be dried The surface temperature detection means for detecting the contact temperature in a non-contact manner, the comparison between the surface temperature detected by the surface temperature detection means and a predetermined temperature threshold value, and the time variation of the surface temperature, the drying within the predetermined area And a control means for controlling the air direction changing means to extract the target range and blow the dry air to the drying target range, and the temporal change is calculated from a predetermined number of detection results, and the predetermined number of times Is excluding Characterized in that it is set according to the time from operation start of the machine to reach the predetermined temperature threshold.

  According to the dehumidifier according to the present invention, the drying state of the object to be dried is determined by determining the dry state of the object to be dried from the value of the surface temperature detected by the surface temperature detecting means and the temporal change of the surface temperature. It can be detected with high accuracy.

1 is an external perspective view of a dehumidifier according to Embodiment 1 of the present invention. The internal schematic block diagram of the dehumidifier which concerns on Embodiment 1 of this invention. Schematic of the wind direction change means and infrared sensor which concern on Embodiment 1 of this invention. The conceptual diagram of the detection range by the infrared sensor which concerns on Embodiment 1 of this invention. The conceptual diagram of the data sampling by the infrared sensor which concerns on Embodiment 1 of this invention. The actual measurement data of various temperature transient characteristics at the time of dehumidifier starting which concerns on Embodiment 1 of this invention. The drying characteristic curve figure of the to-be-dried object in the surrounding air temperature humidity constant environment based on the general drying theory. The drying characteristic curve figure of the to-be-dried object which concerns on Embodiment 1 of this invention. The flowchart figure of the control method of the dehumidifier which concerns on Embodiment 1 of this invention. The conceptual diagram of the judgment method of the dry condition which concerns on Embodiment 1 of this invention. An example of the to-be-dried object installation figure of the top drying assumption which concerns on Embodiment 1 of this invention. An example of the conceptual diagram of the detection data by the infrared sensor at the time of drying-up object drying assumption which concerns on Embodiment 1 of this invention. An example of the to-be-dried object installation figure of the prior drying assumption which concerns on Embodiment 1 of this invention. An example of the detection data conceptual diagram by the infrared sensor at the time of drying object pre-drying assumption concerning Embodiment 1 of this invention. An example of the detection data conceptual diagram by the infrared sensor which concerns on Embodiment 2 of this invention. The flowchart figure of the control method of the dehumidifier which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.
1 is an external perspective view of a dehumidifier according to Embodiment 1 of the present invention, FIG. 2 is an internal schematic configuration diagram of the dehumidifier according to Embodiment 1 of the present invention, and FIG. 3 is an implementation of the present invention. It is the schematic of a wind direction change means and an infrared sensor which concerns on the form 1.
As shown in FIG. 1, the dehumidifier of the present invention includes a dehumidifier housing 100, a suction port 101 for taking in indoor air A into the dehumidifier housing 100, and moisture removed from the air taken in from the suction port 101. A water storage tank 102 for storing water and an exhaust port 103 for discharging the dry air B from which moisture has been removed from the dehumidifier housing 100 to the room are configured. The exhaust port 103 is provided with a wind direction changing means 1 capable of adjusting the wind direction of the dry air B. The wind direction changing means 1 has a vertical louver 1a for changing the wind direction with respect to the vertical direction, and a horizontal direction. It is comprised by the horizontal direction louver 1b for changing a wind direction. In addition, the water storage tank 102 is configured to be detachable from the dehumidifier housing 100, and the water stored in the water storage tank 102 can be discarded by removing the water storage tank 102.

Next, the internal configuration of the dehumidifier will be described.
FIG. 2 shows an outline of the internal structure of the dehumidifier housing 100. The dehumidifier housing 100 includes a blower fan 2 that generates an air flow that sucks indoor air A from the suction port 101 and discharges dry air B from the exhaust port 103, and a fan rotation motor 2 a that rotates the blower fan 2. The indoor air A that is provided and sucked from the suction port 101 is detected by the indoor air temperature sensor 3 that detects the temperature of the indoor air A and the indoor humidity temperature sensor 4 that detects the humidity of the indoor air A. After that, the moisture in the air is removed by the dehumidifying means 5, and thereafter, it is discharged as dry air B from the exhaust port 103 into the room via the blower fan 2. Here, the dehumidifying means 5 only needs to be able to remove and condense moisture in the air. For example, as the most general one, a heat pump circuit is formed and moisture in the air is condensed in the evaporator. For example, a desiccant method in which moisture in the air removed by the adsorbent is condensed in a heat exchanger can be used.

Next, the structure near the exhaust port 103 will be described.
Near the exhaust port 103, there is provided a wind direction changing means 1 capable of adjusting the wind direction of the dry air B as shown in FIG. 3, and the wind direction changing means 1 is a longitudinal direction for changing the wind direction with respect to the vertical direction in the room. A louver 1a, a lateral louver 1b for changing the wind direction with respect to the horizontal direction in the room, a longitudinal rotation motor 1c for rotationally driving the longitudinal louver 1a, and a lateral direction for rotationally driving the lateral louver 1b The rotary motor 1d is used. Here, the horizontal direction louver 1b is installed in a part of the vertical direction louver 1a so that the direction of the vertical direction changes in accordance with the movement of the vertical direction louver 1a. An infrared sensor 6 serving as a surface temperature detecting means capable of detecting the surface temperature of a predetermined area in a non-contact manner is integrally installed on a part of the lateral louver 1b. The surface temperature is configured to be substantially in the same direction as the direction of the dry air B changed by the wind direction changing means 1. Therefore, the infrared sensor 6 can detect the surface temperature of all regions within the range in which the wind direction changing means 1 can blow.
In the present application, the wind direction changing means 1 and the infrared sensor 6 serving as the surface temperature detecting means are integrally formed. However, the present invention is not limited to this, and the infrared sensor 6 may be provided separately from the wind direction changing means 1. good.

  Here, there are various types of infrared sensors 6 depending on the operation principle, but in the first embodiment, those using the thermoelectromotive force effect are used. Therefore, the infrared sensor 6 includes an infrared absorption film 6a that receives thermal radiation (infrared radiation) emitted from the surface of a predetermined region and a thermistor 6b that detects the temperature of the infrared absorption film 6a. The temperature difference between the heat-sensitive partial temperature (warm contact) of the infrared absorption film 6a that has been heated and the temperature of the infrared absorption film 6a itself (cold contact) detected by the thermistor 6b is converted into an electrical signal such as a voltage. The surface temperature of a predetermined region is detected from the magnitude of this electric signal.

Next, the control means of the dehumidifier of the present invention will be described with reference to FIG.
The control circuit 7 serves as a control means of the dehumidifier. The control circuit 7 takes in the detection results of the infrared sensor 6, the thermistor 6b, the indoor air temperature sensor 3, and the indoor air humidity sensor 4, and can detect all from the respective detection results. The drying object contained in the area is determined to be dried, and based on the determination result, the vertical rotation motor 1c and the horizontal rotation motor 1d are controlled to change the blowing direction of the dry air B, or the fan rotation motor 2a. Is controlled to adjust the amount of blown air, or the dehumidifying means 5 is controlled to adjust the dehumidifying capacity.

Next, an example of operation | movement in the dehumidifier of this invention is demonstrated. FIG. 4 conceptually shows the detection range by the infrared sensor 6.
When a start button (not shown) provided on the upper surface of the dehumidifier housing 100 is pressed, the dehumidifier of the present invention operates the fan rotation motor 2a to rotate the blower fan 5. As a result, the indoor air A is taken into the dehumidifier housing 100 from the suction port 101, the temperature is detected by the indoor air temperature sensor 3, and the humidity is detected by the indoor air humidity sensor 4, and then sent to the dehumidifying means 5. In the dehumidifying means 5, the indoor air A is dehydrated by the dehumidifying method such as the heat pump method and the desiccant method described above to become the dry air B. Is done. At this time, the dry air B is blown by the wind direction changing means 1 in the direction of a desired area in the room. The water removed from the room air A by the dehumidifying means 5 is stored in the water storage tank 102 as condensed water C.

  During the operation, since the infrared sensor 6 is installed integrally with the wind direction changing means 1, it is possible to detect the surface temperature of a predetermined region that is substantially in the same direction as the blowing direction of the dry air B, and the result is as follows. Input to the control circuit 7. In addition, detection results of the room temperature and the room humidity detected by the room air temperature sensor 3 and the room air humidity sensor 4 are also input to the control circuit 7. Thereafter, the control circuit 7 compares the surface temperature of the predetermined area obtained by the infrared sensor 6 with the predetermined temperature considering the room temperature and the room humidity, and the range of the predetermined area having a surface temperature lower than the predetermined temperature, A range in which the surface temperature changes with time is determined to be a drying target range in which an undried material to be dried exists. Thereafter, the control circuit 7 controls the air direction changing means 1 so that the dry air B is blown into the drying target range. Further, for example, when the dryness of the drying target range is particularly low, the input of the fan rotation motor 2a is increased to increase the blowing capacity of the blower fan 2, and control is performed so that more dry air B is blown to the drying target range. Do.

As described above, the infrared sensor 6 is installed in the wind direction changing portion (vertical direction louver 1a and horizontal direction louver 1b) of the wind direction changing means 1, and the direction detected by the infrared sensor 6 and the blowing direction of the dry air B are always matched. Therefore, it is possible to prevent the infrared sensor 6 from erroneously detecting due to the influence of the dry air B. As a result, the degree of dryness of the object to be dried can be accurately detected, so that the object to be dried can be prevented from ending in an undried state, and there is no wasteful operation due to erroneous detection. Things can be dried more quickly. Further, by installing the infrared sensor 6 in the wind direction changing portion (vertical direction louver 1a and horizontal direction louver 1b) of the wind direction changing means 1, it is necessary to separately install driving means for changing the detection direction of the infrared sensor 6. The cost for the driving means for the infrared sensor 6 can be reduced. In addition, the wind direction changing portion 1 (vertical direction louver 1a and horizontal direction louver 1b) of the wind direction changing means 1 is configured so that the wind direction can be changed in two axial directions of a substantially vertical direction and a substantially horizontal direction. The area can be made dry and the area over which the surface temperature can be measured can be increased. In addition, since the wind direction can be changed more finely, the drying target range can be detected with high accuracy, and more detailed drying air B can be blown out.
In the first embodiment, since the wind direction changing unit 1 and the infrared sensor 6 are integrally formed, the position that the infrared sensor 6 actually detects when the user touches the wind direction changing unit 1. And the detection position assumed on the control circuit 7 side may deviate. Therefore, for example, every time a predetermined time elapses, the vertical louver 1a and the horizontal louver 1b are rotationally driven to a predetermined position, and resetting is performed so that the actual position of the louver matches the position detected by the control circuit 7. It is desirable to do. Thus, even if the user touches the louver and the actual position and the detection position of the control circuit 7 are shifted, the correction can be performed, so that erroneous detection due to this can be prevented.

Next, a method for measuring the surface temperature of the predetermined region will be described with reference to FIGS. FIG. 4 is a conceptual diagram of a detection range by the infrared sensor 6 according to Embodiment 1 of the present invention, and FIG. 5 is a conceptual diagram of data sampling by the infrared sensor 6 according to Embodiment 1 of the present invention.
As shown in FIG. 4, when all the areas that can be detected by the infrared sensor 6 are the entire scanning range 200, the entire scanning range 200 has a planar shape that extends in the horizontal direction (horizontal direction) and the vertical direction (vertical direction). It becomes a range. Here, the infrared sensor 6 is controlled to measure the surface temperature for each divided area 201 obtained by dividing the entire scanning range 200 into a plurality of parts in the horizontal direction (horizontal direction) and the vertical direction (vertical direction). Thereby, a detailed temperature map can be produced for a wide area, and finer dry air B can be blown in units of divided areas 201.

Next, the operation in each divided area 201 will be described.
FIG. 5 is a conceptual diagram of data sampling performed in each divided area 201. 2002 is a sampling range in which the infrared absorption film 6a of the infrared sensor 6 receives heat radiation (that is, a range in which infrared generation amount can be detected), 202a is a sampling center point of the sampling range 202, The surface temperature detected from the amount of infrared rays generated from the sampling range 202 is used as the surface temperature of the sampling center point 202a. Here, as is apparent from the figure, a plurality of surface temperatures are detected in one divided area 201. At this time, as the surface temperature of the divided area 201, data indicating a minimum value of a plurality of surface temperatures or obviously different from other surface temperatures is used as abnormal data, and the minimum value excluding the abnormal data is used. Even if the undried portion of the material to be dried, which is generally at a low temperature, is smaller than the area of the dividing element 201, the drying target range can be extracted, and the drying residue of the material to be dried can be prevented. In addition, you may employ | adopt methods other than the above, for example, the method of using the average value of several surface temperature as the surface temperature of the division area 201. FIG.

Next, the detection means using the thermistor 6b of the infrared sensor 6 will be described with reference to FIG. FIG. 6 is actual measurement data of various temperature transient characteristics when the dehumidifier according to Embodiment 1 of the present invention is started.
In the first embodiment, the detection result of the thermistor 6b constituting the infrared sensor 6 is used as the dry air temperature detection means for measuring the temperature of the dry air B. This is for measuring the temperature of the thermistor 6b and the infrared absorption film 6a. Since the infrared sensor 6 is installed in the air passage through which the dry air B passes, the temperature of the infrared absorption film 6a is equal to that of the dry air B. Since the temperature is substantially the same, the temperature of the dry air B can be detected by the thermistor 6b. This eliminates the need to provide a separate sensor for detecting the temperature of the dry air B, and thus enables various controls using the temperature of the dry air B while suppressing an increase in cost.

Next, the detection means using the temperature of the dry air B will be described. 6 in FIG. 6 is the room temperature measured by the room air temperature sensor 3 (because the temperature of the room air A is substantially room temperature), 301 is the surface temperature of the object to be dried measured by a separately prepared thermocouple, and 302 is the thermistor 6b. The measured temperature of the dry air B, 303 is the surface temperature of the object to be dried detected by the infrared sensor 6. The surface temperature 301 of the object to be dried detected by the thermocouple and the surface temperature 303 of the object to be dried detected by the infrared sensor 6 should be essentially the same temperature, but as the temperature 302 of the dry air B increases. It can be seen that the difference is increasing. Accordingly, the temperature 302 of the dry air B is detected by the thermistor 6b, and the result of correcting the surface temperature 303 of the object to be dried detected by the infrared sensor 6 using the value is the corrected surface temperature 304. The corrected surface temperature 304 is substantially equal to the surface temperature 301 of the object to be dried detected by the thermocouple. As described above, the surface temperature of the object to be dried can be detected with high accuracy by correcting the surface temperature value of the predetermined area detected by the infrared sensor 6 using the temperature of the dry air B.
Further, in consideration of the situation where the room temperature 300 changes transiently, the detection result of the indoor air temperature sensor 3 is also used to correct the surface temperature value of the predetermined area detected by the infrared sensor 6, thereby further improving the accuracy. The surface temperature of the object to be dried can be detected.
As described above, by increasing the detection accuracy of the surface temperature of the object to be dried, it is possible to accurately detect the drying of the object to be dried.

Next, the drying characteristics of an object to be dried in a constant ambient air temperature and humidity environment based on a general drying theory will be described. FIG. 7 is a drying characteristic curve diagram of an object to be dried in a constant ambient air temperature and humidity environment based on a general drying theory.
In FIG. 7, 306 is the surface temperature of the object to be dried under a constant ambient air temperature and humidity environment, 307 is the ambient air temperature of the object to be dried, and 500 is the moisture content of the object to be dried. Reference numeral 501 denotes a limit moisture content, 502 denotes an equilibrium moisture content, 503 denotes a preheating period, 504 denotes a constant rate period, 505 denotes a decrement period, and 506 denotes a drying end period. Here, the moisture content 500 of the material to be dried is calculated from the formula (W−W0) / W0 (the weight of the material to be dried containing water is W, and the dry amount of the material to be dried is W0).

  When the object to be dried is installed in an environment maintained at a constant temperature, humidity, and air flow rate, first, a preheating period 503, which is a state before drying proceeds, is entered. In the preheating period 503, the moisture content 500 of the object to be dried begins to decrease, and the surface temperature 306 of the object to be dried gradually increases. Thereafter, a constant rate period 504 in which the surface of the object to be dried is dried while maintaining a wet surface state is entered. In the constant rate period 504, the moisture content 500 of the object to be dried decreases linearly at a constant rate while the surface temperature 306 of the object to be dried remains constant. Thereafter, a rate-decreasing period 505 in which a dry surface starts to occur on the surface of the object to be dried is entered. In the reduction period 505, the surface temperature 306 of the object to be dried increases toward the ambient air temperature 307. Then, the drying end period 506 in which the material to be dried is in a dry state is entered. In the drying end period 506, both the moisture content 500 and the surface temperature 306 of the object to be dried are constant values. Here, the moisture content at the time of transition from the constant rate period 504 to the reduction rate period 505 is the limit moisture content 501, the moisture content at which drying does not proceed further, that is, the moisture content at the drying end period 506 is the equilibrium moisture content 502. I'm calling.

Next, the drying characteristics of an object to be dried when the object to be dried is actually dried using a dehumidifier will be described. FIG. 8 is a drying characteristic curve diagram of an object to be dried when the object to be dried is dried.
In FIG. 8, 308 is the surface temperature of the object to be dried, 309 is the back surface temperature of the object to be dried, ΔT _r1 and ΔT _r2 are the temperature difference between the surface temperature of the object to be dried and room temperature, and t _a1 and t _b1 are the object to be dried. The elapsed time for the surface temperature of the material to reach room temperature, t _a2 , t _b2 are the elapsed time for the surface of the object to be dried to finish, t _a3 , t _b3 are the elapsed time for the back surface temperature of the object to be dried to reach room temperature, t _a4 and _tb4 are elapsed times when the drying of the back surface of the object to be dried is completed. Note that 308a to 309a are for objects to be dried with a high drying speed, and 308b to 309b are for objects to be dried with a low drying speed. Here, the drying speed of the object to be dried is determined not only by the material of the object to be dried, but also by the distance from the dehumidifier, the contact condition of the dry air B, the situation of the surrounding environment, and the like.

  As described with reference to FIG. 7, the surface temperature 306 of the object to be dried gradually increases when the reduction period 505 is reached, and becomes substantially equal to the ambient air temperature 307 in the drying end period 506. However, in an actual dehumidifier, the object to be dried is dried by applying the drying air B having a temperature higher than room temperature 300, so that the condition of the object to be dried and the position of the object to be dried, etc. Since the ambient air temperature 307 of the object to be dried differs depending on the material and the ease of drying differs depending on the material of the object to be dried, as shown in FIG. Like the surface temperature 308a of the dried product and the surface temperature 308b of the material to be dried with a slow drying rate, the temperature rise characteristics in the drying process, the temperature reached at the end of drying, and the surface temperature 308 after reaching the room temperature of 300 or more The time to reach the drying end period 506 may be different.

Therefore, in the present invention, when the detected surface temperature 308 is room temperature 300 or higher and the temporal change of the surface temperature 308 is small, the area is determined to be dry and is controlled to be excluded from the drying target. . By doing so, it is possible to detect the drying of the object to be dried with higher accuracy even when the objects to be dried in the drying completion period 506 having different temperatures and arrival times are dried at the same time. You can dry things quickly and reliably.
In the first embodiment, since the room temperature 300 varies depending on the dry air B detected by the thermistor 6b, the temporal change in the surface temperature 308 is detected by the room air temperature sensor 3. Detection is performed by temperature differences ΔT _r1 and ΔT _r2 between the surface temperature 308 of the object 300 and the object to be dried. By doing in this way, even if the room temperature 300 fluctuates, it is possible to detect the drying of the object to be dried with higher accuracy without being affected by the change.
Further, even when the temporal change of the surface temperature 308 is detected using the temperature of the dry air B instead of the room temperature 300, it is possible to determine the drying of the object to be dried.

Next, a specific control method of the dehumidifier in Embodiment 1 of the present invention will be described. FIG. 9 is a flowchart showing a control method of the dehumidifier according to Embodiment 1 of the present invention.
When a user presses a start button (not shown) provided on the top surface of the dehumidifier housing 100, the dehumidifier is turned on (step S1), and the blower fan 2 and the dehumidifying means 5 are operated by a signal from the control circuit 7. The dehumidifying operation is started (step S2).
Next, the indoor air temperature sensor 3 detects the indoor air temperature _{T a} (step S3), and the control circuit 7 sets the first temperature threshold value _{T trig1} with room air temperature _{T a} (step S4). Next, the wind direction changing means 1 is driven by a signal from the control circuit 7, and the surface temperature of the object in each divided area 201 is detected by the infrared sensor 6 while blowing the dry air B to the entire scanning range 200 (step S5). . Next, the first temperature threshold value T _trig1 set in step S4 is compared with the surface temperature of each divided area 201 obtained in step S5, and the divided area 201 whose surface temperature is lower than the first temperature threshold value T _trig1. Is determined as the dry matter range 203 where the dry matter exists, and this dry matter range 203 is set as the drying target range 204 (step S6). Here, when the to-be-dried object range is detected by being divided into a plurality, a range in which all the to-be-dried object ranges are surrounded by a rectangular shape is set as the to-be-dried object range 203. Thus, by setting the to-be-dried object range 203, the dry air B can be blown also to the to-be-dried object between a plurality of to-be-dried objects that could not be detected.
The operations in steps S3 to S6 are the drying object range detection step 10 for extracting the range where the drying object exists.
In step S5 of the to-be-dried object range detection step 10, for example, the louver rotation speed of the wind direction changing means 1 is made faster than the louver rotation speed of the wind direction changing means 1 in step S9, or all the divided areas 201 are detected. The object to be dried can be detected by skipping one line without skipping or detecting the coordinates of the four corners of the object to be dried by starting from the outer periphery of the entire scanning range 200. The time until drying can be shortened. In step S5, the object to be dried is extracted from the room by using the surface temperature detected by the infrared sensor 6, and the temperature of the surface of the indoor wall surface or furniture in the room and the object to be dried. The temperature difference with the surface temperature is larger than the temperature difference between the dried portion and the undried portion of the object to be dried in step S9. Accordingly, since the object to be dried is easy to detect, the object to be dried can be detected without erroneous detection even if the number of detections by the infrared sensor 6 is reduced. By performing such control, it is possible to reduce the time required for step S5 for detecting a wide range, and as a result, it is possible to reduce the time until the object to be dried is dried. Moreover, shortening the time to dry the object to be dried also means that the energy required for drying the object to be dried can be reduced.

Next, the indoor air temperature sensor 3 detects the indoor air temperature T _a again (step S7), and the control circuit 7 sets the second temperature threshold value T _TRIG2 with newly detected indoor air temperature T _a (Step S8). Next, the wind direction changing means 1 is driven by a control signal from the control circuit 7, and the surface temperature of each divided area 201 is detected by the infrared sensor 6 while blowing the dry air B to the drying target range 204 (step S9). Next, the second temperature threshold value T _trig2 set in step S8 is compared with the surface temperature of each divided area 201 obtained in step S9, and the divided area 201 whose surface temperature is lower than the second temperature threshold value T _trig2. And the divided area 201 in which the temperature difference between the surface temperature and the second temperature threshold value T _trig2 changes with time is determined to be a range where an undried state exists in the object to be dried, and this range is dried. Reset as the target range 204 (step S10). Here, when the drying target range is detected by being divided into a plurality of ranges, a range in which all the drying target ranges are surrounded by a rectangular shape is set as the drying target range 204. By setting the drying target range 204 in this manner, the drying air B can be blown also to the drying target range between the plurality of drying target ranges that could not be detected.

Then, by comparing the predetermined humidity threshold _{H trig} that previously determined to room air humidity _{H a} detected by the indoor air humidity sensor 4 (step S11), and was the room air humidity _{H a} is more humidity threshold _{H trig} If this is the case (No in step S11), the elapsed time t from the start of operation is compared with the first update time t _upd1 (step S12), and the elapsed time t from the start of operation has passed the first update time t _upd1 . If not (No in step S12), the process returns to step S7 and the subsequent steps are performed again.
In addition, when the elapsed time t from the start of operation has passed the first update time t _upd1 (Yes in step S12), after resetting the elapsed time t (step S13), the process returns to step S3 and thereafter Perform the above steps again. Thus, by _performing the to-be-dried object range detection process 10 whenever the first update time t _upd1 elapses, for example, when the user newly adds the to-be-dried object, the added to-be-dried object Can also be extracted and dried. As a specific set value, the first update time t _upd1 is set to about 30 to 60 minutes.
The operations in steps S7 to S12 are the drying target range blowing process 11 in which the process of re-extracting the drying target range 204 while blowing the drying air B to the object to be dried is sequentially repeated.

On the other hand, in step S11, (Yes in step S11) If the room air humidity H _a seemed less humidity threshold H _trig, determines that the material to be dried is all dried, to stop all operation of the dehumidifier in power Is turned OFF (step S14).
The process from step S11 to step S14 is the drying end determination process 12 in which it is determined that the object to be dried is dried and the operation of the dehumidifier is ended.

  By using the control method having the drying target range blowing step 11 as described above, the drying air B can be intensively blown to the dried object and the undried portion of the dried object. Time until the product is dried can be shortened. Therefore, it is possible to reduce energy related to drying the object to be dried.

Here, the first temperature threshold value T _trig1 may be set by using a room air temperature T _a sensed by the indoor air temperature sensor 3, using the temperature T _s of dry air B, which is detected by the thermistor 6b May be set. In general, the surface temperature of the object to be dried immediately after washing or dehydration is as low as washing water because the object to be dried contains water, and even when the drying air B is blown to the object to be dried, a temperature lower than the temperature T _s of the room air temperature T _a or dry air B because it is deprived of the latent heat of evaporation to the ambient air from the material to be dried. Therefore, by setting the first temperature threshold value T _trig1 as T _a -α or T _s -β, it can be determined that an object to be dried exists in a range equal to or lower than the first temperature threshold value T _trig1 . Note that α and β need to be changed according to the capacity of the dehumidifier and the operation load, and the constant rate at which the drying rate is constant immediately after the start of operation, which is assumed to contain a lot of water immediately after washing or dehydration. period, T _a-.alpha. relative to the room air temperature T _a, the first update time t _UPD1 after drying is supposed progressed to some extent, relative to the temperature T _s of dry air B T It is _desirable to use _s −β as the first temperature threshold value T _trig1 because the deviation from the temperature detected by the infrared sensor 6 is small and the detection accuracy is improved.

In addition, the second temperature threshold value T _trig2 is set higher than the first temperature threshold value T _{trig1 regardless of which} of the indoor air temperature T _a and the temperature T _s of the dry air B is used as a reference. This is the first temperature threshold value T _trig1 is a threshold value for extracting the clearly than the temperature T _s of the room air temperature T _a and the dry air B is a low temperature material to be dried (drying target range 203), Since the second temperature threshold value T _trig2 is a threshold value for extracting an undried portion (drying target range 204) in the dried object range 203, the second temperature threshold value T _trig2 is set to be a second temperature threshold value than the first temperature threshold value T _trig1 . By _setting T _trig2 to a high temperature, an undried part in the object to be dried can be detected, and the _{object to} be dried becomes more accurate as the second temperature threshold T _trig2 is closer to the temperature T _{s of the} dry air. It is possible to detect an undried portion inside.

  Further, before detecting the surface temperature of the object to be dried and blowing the dry air B in step S9, the longitudinal louver 1a and the lateral louver 1b are rotationally driven to predetermined positions, and the actual position of the louver is determined. It is desirable to perform control so that the position detected by the control circuit 7 is matched. Thus, even if the user touches the louver and the actual position and the detection position of the control circuit 7 are shifted, the correction can be performed, so that erroneous detection due to this can be prevented.

In step S1, when the power is turned on, a series of operations for drying the object to be dried is started. A switch for drying the object to be dried is provided separately from the power source, and step S1. The operation may be started by turning on the switch.
In step S2, the wind direction changing means 1 may be driven.

Next, the process of resetting the drying target range 204 in step S9 to 10 will be described in detail. FIG. 10 is a conceptual diagram illustrating a dry state determination method according to Embodiment 1 of the present invention.
The left diagram of FIG. 10 shows the surface temperature of each divided area 201 detected by the infrared sensor 6 while blowing the dry air B to the drying target range 204 in step S9. Further, the right diagram of FIG. 10 shows a data processing map 205 in which the temporal change of the temperature difference between the surface temperature of each divided area 201 and the second temperature threshold value T _trig2 is processed. An area where a temperature difference higher than the previous time is detected, a − sign indicates an area where a lower temperature difference than the previous time is detected, and a 0 sign indicates an area where a temperature difference similar to the previous time is detected. Here, the temperature difference that is almost the same as the previous time is given when the change amount of the temperature difference falls within a predetermined range (for example, the change amount of the temperature difference is within ± 1 degree). The first stage is the first measurement result in step S9, the second stage is the second measurement result in step S9, the third stage is the third measurement result in step S9, and the bottom stage is the fourth measurement result in step S9. The measurement results are shown.
Here, the drying target range 204 described for the first time is the drying target range 204 detected and set in step S6 before step S9, and the drying target range 204 described for the second time and thereafter is the same. The drying target range 204 detected and set in step S10. _{Reference numeral} 206 denotes a low-temperature area which is a divided area where the temperature difference between the surface temperature detected in step S9 and the second temperature threshold T _trig2 is lower than room temperature, and 207 denotes the surface temperature and the second temperature threshold T _trig2 . This is a divided area where the temperature difference is higher than room temperature, but is still in the range where the temperature change has occurred, and this range is the semi-drying range.

First, in step S <b> 9 for the first time, the drying air B is blown to the drying target range 204 and the surface temperature of the object to be dried is detected by the infrared sensor 6. At this time, the control circuit 7 calculates the temperature difference between the surface temperature and the second temperature threshold value T _trig2 , _compares the temperature difference detected immediately before with the temperature difference detected this time, and the temperature difference higher than the previous time difference. An area where the temperature difference is detected is indicated by a + symbol, an area where a temperature difference lower than the previous time is detected, a-sign, and an area where a temperature difference substantially the same as the previous time is detected is indicated by a 0 symbol.
Here, the control circuit 7 determines that the range other than the low temperature area 206 in the data processing map 205 having the value of 0 symbol is dried, and sets the drying target range 204 to the first time in step S10. Reset as shown on the right. When there are a plurality of drying target ranges 204, a rectangular range including all of them is set as the drying target range 204.
In the data processing map 205, there is an area having a value of 0 symbol and belonging to the low temperature area 206. This area is set as the low temperature object area 208, and the area set as the low temperature object area 208 continuously for a predetermined number of times is determined as an area where there is a low temperature object different from the drying target, and is excluded from the drying target range 204. It is controlled. Here, the low-temperature object indicates an object such as a window that has a temperature lower than room temperature. In the first embodiment, when the low temperature object area 208 is detected twice consecutively, it is controlled so as to be excluded from the drying target range 204.

In step S9 of the second time, similarly to the first time, blowing of dry air B is performed on the reset drying target range 204, and the surface temperature of the object to be dried is detected by the infrared sensor 6. At this time, the control circuit 7 calculates the temperature difference between the surface temperature and the second temperature threshold value T _trig2 , _compares the temperature difference detected immediately before with the temperature difference detected this time, and the temperature difference higher than the previous time difference. An area where the temperature difference is detected is indicated by a + symbol, an area where a temperature difference lower than the previous time is detected, a-sign, and an area where a temperature difference substantially the same as the previous time is detected is indicated by a 0 symbol.
Here, the same area is detected as the low temperature object area 208 in the second time as in the first time. Accordingly, in the second time, it is determined that the range other than the low temperature area 206 and the low temperature object area 208 in the data processing map 205 are dried, and the drying target range 204 is set in the subsequent step S10. Reset as shown in the second figure on the right. When there are a plurality of drying target ranges 204, a rectangular range including all of them is set as the drying target range 204.

In step S9 of the third time, similarly to the first time and the second time, the blowing air of the dry air B is detected for the reset drying target range 204, and the surface temperature of the object to be dried is detected by the infrared sensor 6. At this time, the control circuit 7 calculates the temperature difference between the surface temperature and the second temperature threshold value T _trig2 , _compares the temperature difference detected immediately before with the temperature difference detected this time, and the temperature difference higher than the previous time difference. An area where the temperature difference is detected is indicated by a + symbol, an area where a temperature difference lower than the previous time is detected, a-sign, and an area where a temperature difference substantially the same as the previous time is detected is indicated by a 0 symbol.
Here, the control circuit 7 determines that the range other than the low-temperature area 206 in the data processing map 205 that has a value of 0 is dried, and sets the drying target range 204 for the third time in step S10. Reset as shown on the right. When there are a plurality of drying target ranges 204, a rectangular range including all of them is set as the drying target range 204.

In step S9 of the fourth time, similarly to the first to third times, the drying air B is blown to the reset drying target range 204, and the surface temperature of the object to be dried is detected by the infrared sensor 6. At this time, the control circuit 7 calculates the temperature difference between the surface temperature and the second temperature threshold value T _trig2 , _compares the temperature difference detected immediately before with the temperature difference detected this time, and the temperature difference higher than the previous time difference. An area where the temperature difference is detected is indicated by a + symbol, an area where a temperature difference lower than the previous time is detected, a-sign, and an area where a temperature difference substantially the same as the previous time is detected is indicated by a 0 symbol.
Here, the control circuit 7 determines that the range other than the low-temperature area 206 in the data processing map 205 that has a value of 0 symbol is dried, and sets the drying target range 204 for the fourth time in step S10. Reset as shown on the right. When there are a plurality of drying target ranges 204, a rectangular range including all of them is set as the drying target range 204.

As described above, by determining the divided area where the surface temperature of the object to be dried is higher than the room temperature and the change in the temperature difference between the surface temperature and the second temperature threshold T _trig2 is small as the dried area, the object to be dried is surely obtained. It is possible to detect the drying of an object.
In the first embodiment, the change of the temperature difference between the surface temperature and the second temperature threshold value T _trig2 is verified only by comparison with the previous time. For example, the surface temperature and the second temperature threshold value T _trig2 are If the change of the temperature difference is within a range that is continuous for a predetermined number of times, it may be determined that the temperature has been dried. By doing so, it is possible to prevent erroneous detection in the determination of drying even when the object to be dried moves or the drying speed of the object to be dried is very slow. The predetermined number of times may be changed according to the time required for the area to reach the second temperature threshold value T _trig2 from the start of operation of the dehumidifier. In other words, the longer the time required for the area to reach the second temperature threshold T _trig2 from the start of the operation of the dehumidifier, the slower the drying speed of the area, and thus the time used for the determination of drying. By taking a longer time for the target change (that is, increasing the predetermined number of times), it is possible to prevent the object to be dried from being judged to be dried before it is actually dried. Further, instead of taking a long time for the time change used for the determination of drying, the time change width may be narrowed. Further, instead of the time required for the area to reach the second temperature threshold value T _trig2 from the start of the operation of the dehumidifier, the area may be changed according to the area ratio of the drying target range 204 to the entire scanning range 200. . In this case, the larger the area ratio of the drying target range 204 to the entire scanning range 200 is, the slower the drying speed of the area is. Therefore, in this case, the time of time change may be increased as described above. What is necessary is just to narrow the width of the target change.

Further, in the first embodiment, when the low temperature object area 208 is detected twice consecutively, it is set so as to be excluded from the drying target range 204, but this number is not limited to this and is larger. It is better to set the number of times. This is because if the indoor humidity is high, the material to be dried is very moist, or the drying speed of the material to be dried is very slow, even at the initial stage, even in the area to be dried There may be a case where the temperature difference is lower and the temperature difference between the surface temperature and the second temperature threshold value T _trig2 is small. For example, by setting the predetermined number of times required to determine the low-temperature object area 208 to be larger than the predetermined number of times required to determine that it is dry, erroneous detection when resetting the drying target range 204 is performed. Can be suppressed.

In the first embodiment, the drying target range 204 is reset every time. However, since the drying speed of normal clothing is not so fast, for example, the drying target range 204 is reset every predetermined time. You may be made to carry out. By _{doing so} , the temperature difference between the surface temperature and the second temperature threshold value T _trig2 can be measured periodically, so that the surface temperature and the second temperature can be quantitatively measured regardless of the size of the drying target range 204. It is possible to measure the temporal change of the temperature difference from the temperature threshold value T _trig2 . Moreover, you may make it use the average value of the result measured during the predetermined time for the surface temperature and room temperature of the to-be-dried object used for reset of the drying object range 204. By doing so, even if a sudden false detection factor (for example, when the object to be dried fluctuates or a person passing near the dehumidifier is detected), the influence is reduced. I can do it.

Here, when the laundry is dried by the dehumidifier, there are various patterns in how to dry the laundry, and the laundry is hung from a high place such as a duck or curtain rail and the dehumidifier blows from below. "Drying" is broadly divided into "pre-drying" where the laundry is hung on the clothesline and the dehumidifier is blown from the front. Hereinafter, the relationship between the two types of drying patterns and the detection range of the infrared sensor 6 will be described.
FIG. 11 is an installation diagram of an object to be dried assuming “upper drying”, FIG. 12 is a conceptual diagram of data detected by the infrared sensor 6 when “upper drying” is assumed, and FIG. 13 is an object to be dried assuming “front drying”. FIG. 14 is a conceptual diagram of data detected by the infrared sensor 6 when “front drying” is assumed.
11 and 13, reference numeral 400 denotes an object to be dried. In FIGS. 12 and 14, 203 a to d denote minimum and maximum coordinates (the origin is a dehumidifier) in the horizontal louver direction and the vertical louver direction of the object range 203. (Assuming the lower left of the front). Specifically, the horizontal louver direction minimum coordinate 203a, the horizontal louver direction maximum coordinate 203b, the vertical louver direction minimum coordinate 203c, and the horizontal louver direction maximum coordinate 203d are set.

In the case of “top drying”, as shown in FIG. 11, the objects to be dried 400 viewed from the dehumidifier housing 100 are widely distributed in the vertical louver direction, but do not exist in the front, but in the horizontal louver direction. On the other hand, since it is only the width of the material to be dried 400, it is often distributed narrowly. Therefore, it is assumed that the to-be-dried object range 203 has a distribution that is elongated vertically and solidified as shown in FIG. Therefore, the area of the to-be-dried object range 203 is about 1/3 of the entire scanning range 200, the minimum coordinate 203c becomes a relatively large value in the vertical louver direction, and the minimum coordinate 203a in the horizontal louver direction. And the maximum coordinate 203b is assumed to be small.
On the other hand, in the case of “front drying”, as shown in FIG. 13, the object 400 to be dried viewed from the dehumidifier housing 100 exists only forward in the vertical louver direction, and in the horizontal louver direction. It is often distributed widely up to about the maximum width. Therefore, it is assumed that the to-be-dried object range 203 has a distribution that is solidified downward as shown in FIG. Therefore, the area of the to-be-dried object range 203 is about ½ of the entire scanning range 200, the maximum coordinate 203d becomes a relatively small value in the vertical louver direction, and the minimum coordinate 203a in the horizontal louver direction. It is assumed that the difference between the maximum coordinate 203b and the maximum coordinate 203b increases to a maximum.
Therefore, by using the control method having the dried object range detecting step 10, the drying target range blowing step 11, and the drying completion detecting step 12 as described above, the dried object is compared with the case where the control method is not used. It is assumed that the time and energy required for drying can be reduced to about 1/3 in the case of “top drying” and about 1/2 in the case of “pre-drying”.

In addition, as described in FIG. 9, the to-be-dried object range detection step 10 is repeatedly performed every time the first update time t _upd1 elapses, except when the dehumidifier is started. It is possible to reliably detect an object to be dried even when an object 400 is added, when it is dried from “top drying” to “front drying”, or when the dehumidifier housing 100 is moved. I can do it.
Further, as shown in FIG. 11 and FIG. 13, the to-be-dried object range 203 is set as a rectangular shape including all the to-be-dried objects even when there are a plurality of objects to be dried. Even when the dry object 400 is dispersed or when the small dry object 400 such as a sock cannot be detected, the detection omission of the dry object 400 can be avoided.

Embodiment 2. FIG.
The dehumidifier according to the second exemplary embodiment of the present invention is the same as the first exemplary embodiment with respect to the configuration of the dehumidifier, and the method for setting the drying target range 204 in step S10 in the dehumidifier control method is implemented. Different from Form 1. Hereinafter, the difference will be mainly described. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.

FIG. 15 is a conceptual diagram of data detected by the infrared sensor 6 in Embodiment 2 of the present invention.
Temperature in the second embodiment, 209a, 209 b, 209c in step S10, respectively, and the surface temperature detected by the infrared sensor 6 and the second lower than the temperature threshold value _{T TRIG2} of and surface temperature and the second temperature threshold value _{T TRIG2} This is a divided area 201 with a small change in the difference, and this is set as the drying target central range. 204a, 204b, and 204c are ranges obtained by enlarging one divided area 201 on the outer periphery of the corresponding drying target central ranges 209a to 209c, and are set as drying target ranges. And the range which enclosed each drying object range 204a-c in the rectangular shape is set as the drying object range 204. FIG.

  As described above, an area where the drying of the object to be dried is not completed is defined as a drying target center range 209, and a range obtained by enlarging each divided area 201 on the outer periphery of the drying target central range 209 by one is the drying target range 204. By setting as, for example, it is possible to prevent the object to be dried from swinging due to the blowing of the dry air B and coming off from the drying target. In addition, since the dry air B is also applied around the drying target central range 209 that is in an undried state, moisture in the drying target central range 209 is prevented from spreading to the surroundings and spreading the drying target range 204 over time. This makes it possible to shorten the time taken to dry the object to be dried.

Embodiment 3 FIG.
The dehumidifier according to Embodiment 3 of the present invention is the same as Embodiment 1 and Embodiment 2 described above with respect to the configuration of the dehumidifier, and the control method after Step S11 in the dehumidifier control method is implemented. Different from Form 1. Hereinafter, the difference will be mainly described. The same parts as those in the first embodiment and the second embodiment are denoted by the same reference numerals, and a part of the description is omitted.

  FIG. 16 is a flowchart showing a control method of the dehumidifier in Embodiment 3 of the present invention. Since steps S1 to S14 in FIG. 16 are the same as those in the first embodiment, description thereof is omitted.

At step S11 after the room air humidity _{H a} is less than or equal to the humidity threshold value _{H trig} (Yes in step S11), and determines whether dried scope 204 into the material to be dried is present (step S15), and the dried If dry coverage 204 in the object does not exist (no in step S15), and sets the first operation continuation time t _c1 to drying it was determined that almost finished operating duration t _c of the material to be dried and (step S16), and dried if the target range 204 is determined to be present (step S15 Yes), the first operation continuation time determination driving duration t _c that there is undried portion to the object to be dried A second operation continuation time t _c2 longer than t _c1 is set (step S17). Thereafter, the air direction changing means 1 is driven to blow the dry air B to the drying target range 204 set last (step S18). The operation in step S18 is performed until the operation duration time t _c elapses (step 19). After the operation duration time t _c elapses, all the operations of the dehumidifier are stopped and the power is turned off (step S14).
The operations in steps S11 to S14 are the drying end determining step 12 that determines that the object to be dried has been dried and ends the operation of the dehumidifier.

As described above, when the drying of the object to be dried is determined by comparing the indoor air humidity H _a and the humidity threshold H _trig , the operation duration t _c is added to the drying target range 204 detected last in the drying target range blowing step 11. It is preferable to blow the dry air B until the time elapses. Thereby, it is possible to prevent the operation of the dehumidifier from stopping when the object to be dried is undried. Further, by adjusting the length of the operation continuation time t _c depending on the presence or absence of the drying target range 204, the object to be dried can be dried while suppressing the excessive drying of the object to be dried. Here, the second operation continuation time t _c2, to set such time becomes equal to or slightly longer required until determination by the indoor air humidity H _a in the step S11 at least the start of operation is desirable. As a result, even if an erroneous detection of the drying target range 204 occurs without causing excessive drying of the object to be dried, the operation can be stopped in an operation time equivalent to that of the conventional control method, and useless operation can be avoided. .
The length of the operation continuation time t _c, reflecting the transient characteristics of the room air humidity H _a detected by the room air temperature T _a and step S11 is detected in step S8, for example, an indoor air temperature T _a in short for high temperature, it is desirable to set a little longer if the room air humidity H _a had rapidly decreased.

If it is determined that the drying target range 204 exists (Yes in step S15), the process is repeated until the second operation duration time _tc2 elapses, but the drying target range 204 disappears during this period. In such a case, the operation duration time t _c is controlled to be reset to a time shorter than the second operation duration time t _c2 . This, the time is re-set, is set to be shorter than in the first operational duration t _c1 equal or dried scope 204 in consideration of the time taken for eliminating the first operation continuation time t _c1 . Thereby, it is possible to dry the object to be dried without overdrying.

  Further, in step S18, the drying air B is blown to the drying target range 204 detected last. For example, the drying air is not transferred to the drying target range 204 but is supposed to exist. B may be blown. Thereby, since the drying air B is blown over the entire object to be dried, the dry finish state of the object to be dried can be made uniform.

Further, in the first to third embodiments, all are controlled to transition from the results of comparison of the indoor air humidity H _a and humidity threshold H _trig dryness determination step 12, such as dry coverage 204 is present You may control to transfer to the dry condition judgment process 12 when it runs out. Or, provided that the room air humidity H _a is below the humidity threshold value H _trig, the condition that the drying target range 204 is not present, when filled with either condition, to transition to dryness determination step 12 You may control.

DESCRIPTION OF SYMBOLS 1 Wind direction change means, 1a Longitudinal louver, 1b Lateral louver, 1c Longitudinal rotation motor, 1d Lateral rotation motor, 2 Blower fan, 2a Fan rotation motor, 3 Indoor air temperature sensor, 4 Indoor humidity temperature sensor, 5 Dehumidification Means, 6 Infrared sensor, 6a Infrared absorbing film, 6b Thermistor, 7 Control circuit, 10 Drying object range detecting step, 11 Drying target range blowing step, 12 Drying state determining step,
100 Dehumidifier housing, 101 Suction port, 102 Water storage tank, 103 Exhaust port,
200 Full scan range, 201 Divided area, 202 Sampling range, 202a Sampling center point, 203 Dried object range, 203a Horizontal louver direction minimum coordinate, 203b Horizontal louver direction maximum coordinate, 203c Vertical louver direction minimum coordinate, 203d Horizontal louver direction maximum Coordinates, 204 range to dry,
205 Data processing map, 206 Low temperature area, 207 Semi-drying range, 208 Low temperature object area, 209 Center area for drying,
300 Room temperature, 301 Surface temperature of object to be dried measured by thermocouple, 302 Temperature of dry air, 303 Surface temperature of object to be dried detected by infrared sensor, 304 Corrected surface temperature, 305a Drying after hot water washing and dehydration Surface temperature of the object (large heat capacity), 305b surface temperature of the object to be dried (low heat capacity) after hot water washing and dehydration, 306 surface temperature of the object to be dried in a constant ambient air temperature and humidity, 307 ambient air of the object to be dried Temperature, 308a Surface temperature of an object to be dried (fast drying speed), 308b Surface temperature of an object to be dried (slow drying speed), 309a Back surface temperature of an object to be dried (fast drying speed), 309b Object to be dried (slow drying speed) Backside temperature,
400 to be dried,
500 Moisture content of dry matter, 501 Limit moisture content, 502 Equilibrium moisture content, 503 Preheating period, 504 Constant rate period, 505 Decrease period, 506 Drying completion period,
A indoor air, B dry air, C condensed water

Claims (6)

Dehumidifying means for removing moisture in the passing air;
Air blowing means for sucking room air and supplying the dry air obtained by passing through the dehumidifying means to the room;
Indoor temperature detecting means for detecting the temperature of the indoor air;
Indoor humidity detecting means for detecting the humidity of the indoor air;
Wind direction changing means for changing the blowing direction of the dry air;
Surface temperature detection means for detecting the surface temperature of a predetermined region including the object to be dried in a non-contact manner;
From the comparison between the surface temperature detected by the surface temperature detection means and a predetermined temperature threshold, and the temporal change of the surface temperature, the drying target range in the predetermined region is extracted, and the drying target range is extracted to the drying target range. Control means for controlling the wind direction changing means so as to blow air, and
The temporal change is calculated from a predetermined number of detection results,
The predetermined number of times is set according to a time from the start of operation of the dehumidifier until the predetermined temperature threshold is reached. Dehumidifying means for removing moisture in the passing air;
Air blowing means for sucking room air and supplying the dry air obtained by passing through the dehumidifying means to the room;
Indoor temperature detecting means for detecting the temperature of the indoor air;
Indoor humidity detecting means for detecting the humidity of the indoor air;
Wind direction changing means for changing the blowing direction of the dry air;
Surface temperature detection means for detecting the surface temperature of a predetermined region including the object to be dried in a non-contact manner;
From the comparison between the surface temperature detected by the surface temperature detection means and a predetermined temperature threshold, and the temporal change of the surface temperature, the drying target range in the predetermined region is extracted, and the drying target range is extracted to the drying target range. Control means for controlling the wind direction changing means so as to blow air, and
The temporal change is calculated from a predetermined number of detection results,
The predetermined number of times is set according to an area ratio between a range in which the dry air can be blown by the wind direction changing unit and a range to be dried. The control means divides the area that can be blown by the wind direction changing means into a plurality of areas, detects the surface temperature by the surface temperature detection means for each area, and the value of the surface temperature is greater than the predetermined temperature threshold value. 3. The dehumidifier according to claim 1, wherein an area that is high and has a small temporal change in the surface temperature is excluded from the drying target range. 4. The control means excludes an area where the temporal change of the surface temperature is small for a predetermined time from the drying target range even if the value of the surface temperature is lower than the predetermined temperature threshold. The dehumidifier according to any one of claims 1 to 3 . As temporal change of the surface temperature, any of claims 1 to 4, characterized by using a temporal change of the temperature difference between the detected surface temperature and the predetermined temperature threshold value by the surface temperature detecting means Dehumidifier according to crab. The dehumidifier according to any one of claims 1 to 5 , wherein the control unit resets the drying target range every predetermined time.

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