JP3345125B2 - Humidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humidifier used in ordinary households.

[0002]

2. Description of the Related Art Humidifiers have recently been used to increase the relative humidity of a heated room in winter. Conventionally, this type of humidifier has a configuration as shown in FIGS.

As shown in FIG.
02 is fixed, and the bottom of the heating pot 102 and the water tank 10 are fixed.
3 is connected to the bottom of the pipe 3 by a pipe 104. Body 10
An air blower 105 is installed inside 1, and a humidity sensor 113 is provided in an air passage 106 of the air blower 105.

A heating pot 10 is provided on an outer peripheral portion of a side face of the heating pot 102.
A heating element 111 for heating the water in 2 is wound. A guide wall 108 is provided at an upper portion of the heating pot 102 for sending an air flow from the blower 105 through an opening 108 a, and guides steam generated in the heating pot 102 to an outlet 107. A temperature fuse 117 is attached to the heating pot 102 so that the temperature does not become abnormally high even when the food is cooked empty. The water supply tank 109 is a mounting table 110 of the main body 101.
The water tank 109 is detachably housed on the
03 and the heating pot 102 are supplied with water.

A board 118 is attached to the side of the main body 101, and a display unit 112 for displaying an operation state and a relative humidity and a heating element 111 are turned on / off on the board 118.
A driving unit 114 for driving, and a microcomputer 116 for controlling the display unit 112 and the driving unit 114 based on an input value of the input unit 115 or the humidity sensor 113 are mounted.

In the above configuration, the microcomputer 116 at the time of energization causes the display 112 to blink the current humidity based on the input value of the humidity sensor 113. When the set humidity is input from the input unit 115 in this state, the microcomputer 116 continuously lights the set humidity on the display unit 112, compares the set humidity with the current humidity based on the input value of the humidity sensor 113, and determines that the current humidity is lower than the set humidity. If the heating unit 111 is turned on and the heating element 111 is turned on,
Heat the water in 02. At this time, the air from the air blower 105 is blown in from the opening 108 a, mixed with steam in the guide wall 108, and discharged from the outlet 107.

If the current humidity detected by the humidity sensor 113 becomes equal to the set humidity while the humidification is continued, the microcomputer 116 continuously turns on the display on the display unit 112 and controls the driving unit 114 to control the heating element 111. Turn off. After a while, when the humidity becomes lower than the set humidity, the microcomputer 116 controls the driving unit 114 to turn on the heating element 111 to increase the humidity. By repeating such an operation, the indoor humidity is maintained at the humidity set by the user.

When the water in the heating pot 102 runs out and the heating pot 102 is cooked empty, the temperature fuse 117 detects the surface temperature of the heating pot 102 and turns off the heating element 111.
And could be used safely.

[0009]

In such a conventional humidifier, when there is no difference between the outside air temperature at the time of energization and the ambient temperature of the humidity sensor 113, the outside air humidity and the humidity sensor 11
3 is substantially equal to the detected humidity, but when the heating element 111 heats the heating pot 102 and humidification starts, the humidity sensor 113
Is built in the main body 101 together with the heating pot 102, and the temperature around the humidity sensor 113 rises from the outside air due to the radiant heat of the heating pot 102 or heat conduction in the main body 101. Therefore, the humidity detected by the humidity sensor 113 is lower than the humidity of the outside air, and there is a problem that a difference occurs between the actual humidity and the display of the display unit 112, and that the humidifying operation is additionally performed until the set humidity is reached.

Next, when the outside air reaches the set humidity and the heating element 111 is turned off to stop the humidification, the humidity of the outside air gradually decreases. However, due to the hot water in the heating pot 102, the humidity around the humidity sensor 113 is reduced. Since the temperature does not decrease and the change in the detected humidity is smaller than the change in the outside air humidity, there is a problem that the heating element 111 is not turned on again unless the humidity of the outside air is considerably reduced, and the followability is poor.

Further, since the temperature change of the heating pot 102 appears as a temperature change around the humidity sensor 113 with a slight delay in time, the humidity sensor 1 takes into account the influence of the temperature change.
If the detected value of 13 was corrected and used as it was, the correction process would instead give erroneous humidity data, making it impossible to perform proper operation control.

An object of the present invention is to solve the above-mentioned problem, and it is a first object of the present invention to simplify processing on software of a microcomputer 116 and to reduce a deviation between actual humidity and display humidity.

A second object is to perform a temperature correction of the humidity sensor 113 with good timing in consideration of a time delay in which an influence of a temperature change of the heating pot 102 appears, thereby enabling proper operation control.

[0014]

A first means for achieving the first object of the present invention comprises a heating pot built in a main body, a heating element for heating the heating pot, and a heating pot. A blower that conveys the generated water vapor, a humidity sensor installed in an air passage of the blower, a temperature sensor attached to the heating pot, a display unit that performs humidity display, and drive control of the heating element. A microcomputer configured to control the drive unit, the display unit, and the drive unit; and a correction unit configured to correct a humidity detection value of the humidity sensor based on a temperature detection value of the temperature sensor. Is configured to output a predetermined humidity correction value that is divided stepwise with respect to the input of the temperature detection value and the humidity detection value.

A second means for achieving the second object is to correct the detection value of the humidity sensor based on the detection value of the temperature sensor with a delay after a predetermined time from the detection of the temperature change by the temperature sensor. It is configured.

[0016]

According to the first aspect of the present invention, the temperature around the humidity sensor is corrected by comparing the detection value of the temperature sensor with a predetermined correction table and correcting the detection value of the humidity sensor. However, at this time, in the same section divided into several stages, by using the average value within the section as the correction value, the processing on the software of the microcomputer is simple and the difference between the actual humidity and the display humidity can be reduced.

Further, according to the configuration of the second means, the change in the detection value of the temperature sensor attached to the heating pot, that is, the temperature change of the heating pot, and the temperature due to the radiant heat of the heating pot around the humidity sensor and heat conduction from the main body. The correction based on the input value of the temperature sensor is delayed by a time difference from the change, and the operation can be controlled so as to approach the temporal change of the humidity.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. Components having the same configuration as the conventional example are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in the figure, a temperature sensor 1 is attached to the bottom of the heating pot 102. Also the main body 101
The substrate 3 is attached to the side surface, and the substrate 3
, A drive unit 114 and the microcomputer 2. The microcomputer 2 includes a correction unit 2a that corrects the detection value of the humidity sensor 113 based on the detection value of the input unit 115 or the temperature sensor 1, and controls the display unit 112 and the driving unit 114 based on the corrected humidity. .

The humidity correction means 2a according to the present embodiment obtains an expected temperature rise value around the humidity sensor 113 from the temperature rise value of the heating pot 102, sets a humidity correction value at that time, and sets this correction value. This is used to correct the detection value of the humidity sensor 113. The microcomputer 2
The correction value data is stored as shown in (Table 1).

[0021]

[Table 1]

As is clear from Table 1, the correction of the humidity according to the present embodiment is performed by setting the temperature rise value of the heating pot 102 to K
0 to K1, K1 to K2, K2 to K3, K3 to K4, K4
To K5, and correspondingly, the expected temperature rise values around the humidity sensor 113 are correlated with H0 to H1, H
1 to H2, H2 to H3, H3 to H4, and H4 to H5, and the average value of the temperature rise in each range is used as a correction value of the detected humidity of the humidity sensor 113 as S1, S2,
S3, S4, and S5 are set to simplify the calculation of the correction value.

The operation of the above configuration will be described below.
First, when the heating element 111 is energized, the temperature of the heating pot 102 rises, and when the temperature detected by the temperature sensor 1 attached to the heating pot 102 falls within a range of K0 to K1, a humidity sensor 113 correlated with the temperature rise value. Is expected to be in the range of H0 to H1. At this time, the microcomputer 2 corrects the detected humidity of the humidity sensor 113 using S1 as the humidity correction value, and
To be displayed. Further, when the temperature of the heating pot 102 rises and the temperature detected by the temperature sensor 1 falls within the range of K1 to K2, the humidity sensor 11 is used by using S2 as a humidity correction value.
The humidity detection value of No. 3 is corrected.

As described above, according to the first embodiment of the present invention,
If the temperature changes within the divided range, the humidity sensor 113
Since the average value is used as the correction value for correcting the detection value of the above, the software processing of the microcomputer 2 can be simplified, and the difference between the actual humidity and the display humidity can be reduced.

In this embodiment, the microcomputer 2
Stored all the data in (Table 1), but data K0 to K1, K1 to K2, K2 to
Only K3, K3 to K4, and K4 to K5 and the humidity correction values S1, S2, S3, S4, and S5 corresponding thereto may be stored.

Next, a second embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIGS. Components having the same configuration as the conventional example and the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in the figure, the humidity sensor 113 is secondarily heated by radiant heat of the heating pot 102 and heat conduction by the main body 101 to increase the temperature.
Is changed with a delay of time T from the time when the temperature rise is detected by the temperature sensor 1 attached to the power supply. Therefore, the microcomputer 2 corrects the detection value of the humidity sensor 113 after the time T from when the temperature sensor 1 starts detecting the temperature rise, displays the corrected humidity on the display unit 112, and controls the driving unit 114. Thus, energization control of the heating element 111 is performed.

The operation of the above configuration will be described below.
When the heating pot 102 is heated by the heating element 111, the temperature detected by the temperature sensor 1 rises. At that time, the temperature rise around the humidity sensor 113 causes a time delay due to the radiant heat of the heating pot 102 and the heat conduction by the main body 101, and the temperature rises with a delay of T from the time when the temperature sensor 1 detects the temperature rise as shown in FIG. Is empirically known. Therefore, by delaying the correction of the temperature detected by the temperature sensor 1 by the time T and using it as the correction of the input value of the humidity sensor 113, there is no time lag of the temperature change, and accurate humidity display and ON / OFF driving of the heating element 111 can be achieved. it can.

As described above, according to the second embodiment of the present invention,
In order to correct the input value of the humidity sensor 113 in consideration of the time T as the difference in temperature change between the heating pot 102 and the humidity sensor 113, accurate humidity display and ON / OFF are performed.
OFF drive can be performed, and it becomes possible to follow indoor humidity changes with good timing.

[0030]

As is apparent from the above description of the embodiment, according to the present invention, the humidity sensor surrounding the humidity sensor which has a correlation with the temperature of the heating kettle based on the input value of the temperature sensor attached to the heating kettle. When calculating the temperature rise value and correcting the input value of the humidity sensor with the temperature rise value, the detection value of the temperature sensor is compared with a conversion table divided into several stages and predetermined as a correction value in the same category The use of the specific value facilitates the calculation of the correction value, simplifies the processing on the software of the microcomputer, and provides a humidifier having the effect of reducing the difference between the actual humidity and the displayed humidity.

Further, the process of correcting the detected value of the temperature sensor by a time difference between a change in the detected value of the temperature sensor attached to the heating pot and a temperature change around the humidity sensor due to radiant heat of the heating pot and heat conduction from the main body. By delaying, the inconvenience when the thermal influence on the humidity sensor is small is eliminated, and a humidifier having an effect of being able to operate accurately following a change in humidity can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a humidifier according to a first embodiment and a second embodiment of the present invention.

FIG. 2 is a block circuit diagram of the same.

FIG. 3 is a flowchart of the first embodiment.

FIG. 4 is a temperature characteristic diagram of the second embodiment.

FIG. 5 is the same flowchart.

FIG. 6 is a sectional view of a conventional humidifier.

FIG. 7 is a block circuit diagram of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature sensor 2 Microcomputer 2a Correction means 101 Main body 102 Heating pot 105 Blower 111 Heating element 112 Display part 113 Humidity sensor 114 Drive part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-128151 (JP, A) JP-A-63-156957 (JP, A) JP-A-61-11536 (JP, A) JP-A-4- 335943 (JP, A) JP-A-62-248952 (JP, A) JP-A-5-223323 (JP, A) JP-A-3-115336 (JP, U) JP-A-63-170752 (JP, U) 63-56410 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02 102 F24F 6/02

Claims (2)

(57) [Claims] 1. A heating pot built in a main body, a heating element for heating the heating pot, a blower for conveying water vapor generated in the heating pot, and a humidity sensor installed in a ventilation path of the blower. A temperature sensor attached to the heating pot, a display unit for displaying humidity, a drive unit for driving and controlling the heating element, and a microcomputer for controlling the display unit and the drive unit; Correction means for correcting the humidity detection value of the humidity sensor based on the temperature detection value of the sensor is provided in the microcomputer, and the correction means is provided with a predetermined stepwisely divided input for the temperature detection value and the humidity detection value. Humidifier that outputs the humidity correction value of 2. The humidifier according to claim 1, wherein the correction of the detection value of the humidity sensor based on the detection value of the temperature sensor is performed after a fixed time after the temperature sensor detects a temperature change.