JPS6142164Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention includes a humidity sensing element whose electrical resistance value changes according to changes in relative humidity, and a temperature sensing element such as a thermistor for setting humidity. The present invention relates to an improvement in a humidity control device that controls on/off the load of a dehumidifier, humidifier, etc. based on the result of comparison with the relative humidity of the device. The purpose of this invention is to provide a humidity control system that prevents humidity from being adjusted to a set humidity of A% or more or B (A>B)% or less regardless of the humidity. First, the basic principle circuit of the humidity control device shown in FIG. 1 will be explained. In this Figure 1, HR is a humidity sensing element whose electrical resistance value changes depending on relative humidity, E is a power supply circuit, VR is a variable resistor for humidity setting, R ₁ , R ₂ , R ₃ , R ₄ , R ₅ is a fixed resistor, and C is a comparator circuit that compares the voltage a varying by the humidity sensing element HR with the voltage b set by the variable resistor VR, and a voltage is generated at point c only when b>a. Tr is a transistor that controls the relay RY that turns on and off loads such as dehumidifiers and humidifiers, and when voltage is generated at point c, it turns on and operates the relay RY. Therefore, the humidifier, dehumidifier, etc. are turned on and off according to the humidity set by the variable resistor VR, thereby controlling the humidity. Figure 2 shows the relative humidity-electrical resistance characteristics of the humidity sensing element HR.
As shown in FIG. 2, HR has the characteristic that the electrical resistance value decreases as the relative humidity increases. FIG. 3 shows the relationship between the resistance value of the variable resistor VR and the set humidity. In addition, in the basic principle circuit of the humidity control device shown in Figure 1, instead of the variable resistor VR for humidity setting,
By using an element such as a thermistor whose resistance value changes depending on the humidity, it is possible to create a humidity control device that automatically changes the set humidity depending on the temperature. By the way, if the humidity control device with the above configuration is used in a humidifier, for example, if you leave the humidifier turned off when you turn off the heating to sleep in winter (the automatic humidity control mechanism will operate and the humidification will stop). (There is a risk of forgetting to turn off the main power switch of the humidifier) When the indoor temperature drops and a thermistor is used to set the humidity, the humidity controller will use the thermistor to turn off the humidifier when the set humidity is 90, for example. %
Since the air temperature is changing automatically, there is a possibility that the humidifier will operate and cause condensation to form inside the room. The present invention has been developed in view of the above problems, and is designed to prevent humidity from being adjusted above a certain temperature or below a certain humidity, regardless of the set humidity set by a temperature sensing element such as a thermistor. This prevents the set humidity from being set above a certain humidity or below a certain humidity, thereby preventing the above problem from occurring. The present invention will be explained below with reference to FIG. 4 and subsequent figures. Figure 4 is a circuit diagram of one embodiment of the present invention, and C
1, C2, C3 are comparison circuits, AND1, AND2 are AND circuits, OR is an off circuit, HR is a humidity sensing element with the characteristics shown in Figure 2, VR is a thermistor (temperature sensing element) for humidity setting, Tr is a transistor that controls a relay RY that turns on and off loads such as dehumidifiers and humidifiers, and R ₁ to R ₁₁ are fixed resistors. In the above circuit, comparison circuits C1, C2, C3
One input is a humidity temperature sensing element HR whose electrical resistance value changes depending on the humidity, and an input divided by a fixed resistor _R6 , and the + input of the comparator circuit C1 receives a - signal when the temperature drops below 40%, for example. An input voltage divided by fixed resistors R ₁ and R ₂ is added so that the voltage is higher than the input voltage, and a voltage lower than the - input is applied to the + input of the comparator circuit C2 when the humidity reaches 70% or higher. An input voltage divided by fixed resistors R ₃ and R ₄ is added so that the voltage is divided by fixed resistors R 3 and R 4 , and an input voltage divided by a humidity setting thermistor VR and a fixed resistor R ₅ is added to the + input of the comparator circuit C3. The operation of the above circuit is shown in the table below.

[Table] As shown in Table 1 above, according to this circuit, even if the thermistor VR automatically adjusts the set humidity to a range outside the specified range due to temperature changes, the relay RY is turned on when the humidity is below 40%, and the humidity Relay at 70% or above
RY is turned off and the humidity set by the thermistor VR is set only between 41% and 69% humidity. Therefore, when this humidity control device is applied to a humidifier, the humidity will not be adjusted when the humidity is below 40% or above 70%. When applying this humidity control device to a humidifier, the humidifier should be turned on when relay RY is on, and when applied to a dehumidifier, the dehumidifier should be turned off when relay RY is on. All you have to do is make it happen. 5 and 6 show other embodiments of the present invention, FIG. 5 shows a circuit in which humidity is not adjusted to a set humidity of 70% or more, and FIG. The following shows a circuit in which humidity is not adjusted with the set humidity. These can be achieved by partially extracting the circuit of FIG. Table 2 below shows the operation of the circuit shown in FIG. 5, and Table 3 shows the operation of the circuit shown in FIG.

【table】

[Table] As shown in Table 2 above, according to the circuit shown in Fig. 5, the humidity is not adjusted to a set humidity of 70% or more, and as shown in Table 3, the circuit shown in Fig. According to the circuit shown, the humidity is not adjusted to a set humidity of 40% or less. As mentioned above, according to the present invention, even if the humidity becomes more than A% or less than B (A>B)%, the humidity will not be automatically adjusted to more than A% or less than B%. A comfortable humid environment can be obtained at all times without being humidified more than necessary, causing dew condensation, or being extremely dehumidified.

[Brief explanation of the drawing]

Figure 1 is the basic principle circuit diagram of the humidity control device, Figure 2
The figure is a relative degree-electrical resistance characteristic diagram of the humidity sensing element used in the present invention, Figure 3 is a diagram showing the relationship between the resistance value of the variable resistor for humidity setting and relative humidity, and Figure 4 is a diagram showing the relationship between the resistance value and relative humidity of the humidity sensing element used in the present invention. The circuit diagram of the humidity control device, FIGS. 5 and 6, are circuit diagrams of other embodiments of the present invention. HR: Humidity sensing element, VR: Thermistor (temperature sensing element), TH: Thermistor, RY: Relay, C1-C
3: Comparison circuit, AND1, AND2: AND circuit,
OR: OR circuit, Tr: transistor, _R1 to _R11 :
Fixed resistance.

Claims (1)

[Scope of utility model registration request] It is equipped with a humidity sensing element whose electrical resistance value changes according to changes in relative humidity and a temperature sensing element such as a thermistor for setting humidity, and the humidity sensed by the humidity sensing element and the humidity set by the temperature sensing element are and turn on the load on dehumidifiers, humidifiers, etc. based on the results.
In a humidity control device with off control,
A regardless of the set humidity set by the temperature sensing element above.
% or more, or less than B (A>B)%.