JP2001330340A - Electronic dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve long-term maintenance-free and inspection-free properties by preventing dehumidification capacity from dropping and at the same time outputting the fault alarm of a Peltier element. SOLUTION: This electronic dehumidifier is provided with an electronic dehumidifier A for dehumidification in a cooling body 3 that is connected to the cooling surface of an element 2 by the forward conduction to the Peltier element 2, a cooling part sensor 12 for measuring the temperature of the cooling body 3, an external sensor 13 for measuring the temperature of the outside of the electronic dehumidifier A, a dehumidification operation mode for dehumidification by the cooling body 3 by the forward conduction to the element 12 when a cooling part temperature T1 that is measured by the cooling part sensor 12 is higher than 0 deg.C, a thawing operation mode for performing dehumidification operation for a specific long time and then performing inverse conduction to the element 2 for a specific short time, and an alarm means for outputting an alarm when a temperature difference (T2-T1) between an external temperature T2 and the cooling part temperature T1 being measured by the external sensor 13 is equal to or less than a specific setting temperature T0 or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic dehumidifier using a Peltier element installed in power equipment such as a switchboard or the like, and more particularly to a Peltier element which prevents a decrease in dehumidifying capacity and a failure of the Peltier element. The present invention relates to an electronic dehumidifier that outputs an alarm.

[0002]

2. Description of the Related Art A conventional electronic dehumidifier has a cooling fin connected to a cooling surface of a Peltier device, and a heat radiation fin connected to a heat radiation surface. An electronic dehumidifier to perform, and an external sensor that measures the temperature around the electronic dehumidifier, that is, the outside,
The external temperature measured by the external sensor is within a predetermined temperature range,
For example, when the temperature falls within the range of 10 ° C to 0 ° C, 12
After performing normal dehumidifying operation for a period of time, a reverse de-energizing function is provided for supplying electricity to the Peltier element for only 10 minutes to cause the cooling fins to generate heat, thereby performing an ice-drying operation.
That is, when the temperature is higher than 10 ° C. and lower than 0 ° C., the continuous dehumidifying operation is performed.

[0003]

The conventional electronic dehumidifier has a de-icing operation function, but cannot prevent a decrease in dehumidifying capacity due to icing of cooling fins at low temperatures, and the icing is not possible. The problem is that maintenance and inspection need to be performed frequently because the increase only increases the failure of the Peltier element.

The present invention has been made in consideration of the above points, and provides an electronic dehumidifier that prevents a decrease in dehumidifying ability, outputs a Peltier element failure alarm, and achieves long-term maintenance-free inspection. With the goal.

[0005]

In order to achieve the above object, an electronic dehumidifier according to the present invention comprises an electronic dehumidifier for dehumidifying a cooling body connected to a cooling surface of a Peltier device by positively supplying electricity to the device. A cooling unit sensor for measuring the temperature of the cooling body, an external sensor for measuring the temperature outside the electronic dehumidifier, and when the cooling unit temperature measured by the cooling unit sensor is higher than 0 ° C., A dehumidifying operation mode in which the cooling body is dehumidified by positive energization;
In the following case, after performing a predetermined long-time dehumidifying operation, a de-icing operation mode in which reverse energization to the element is performed for a predetermined short time, and a temperature difference between the external temperature measured by the external sensor and the cooling unit temperature is determined. Alarm means for outputting an alarm when the temperature is below a predetermined set temperature.

[0006] The electronic dehumidifier of the present invention configured as described above is provided with a cooling unit sensor for measuring the temperature of a cooling body connected to the cooling surface of the Peltier element. When the temperature of the cooling unit is 0 ° C. or less, the Peltier element is reversely energized to thaw the ice, thereby preventing a decrease in the dehumidifying capacity due to freezing of the cooling body.

Further, an external sensor for measuring the temperature outside the electronic dehumidifier is provided, and when the temperature difference between the external temperature and the cooling unit temperature by the external sensor is lower than a predetermined set temperature, an alarm is output by the alarm means. Therefore, the failure of the Peltier element can be immediately detected, and a long-time maintenance-free inspection can be achieved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. First, in FIG. 3 showing an electronic dehumidifier, 1 is a case of a vertically long electronic dehumidifier A, 2 is a Peltier element housed in a lower part of the case 1, 3 is a cooling body composed of cooling fins, Is connected in contact with the cooling surface, which is the front surface of the device. Reference numeral 4 denotes a radiator composed of radiating fins, which is located above the cooling body 3. Reference numeral 5 denotes a heat conductor connected to the heat radiating surface, which is the back surface of the element 2, and is integrally formed downward from the base of the heat radiator 4.

Reference numeral 6 denotes an intake port formed at a lower portion of the front surface of the case 1, 7 denotes an exhaust port formed on the upper surface of the case 1, 8 denotes a forced convection exhaust fan provided at the exhaust port 7, 9 denotes a power source,
Reference numeral 0 denotes a drain hose connected to the drain port 11 at the bottom of the case 1.

Reference numeral 12 denotes a cooling unit sensor provided in the cooling body 3 for measuring the temperature of the cooling unit of the cooling body 3. Reference numeral 13 denotes an external sensor provided outside the electronic dehumidifier A for measuring the external temperature of the electronic dehumidifier A. .

Next, the operation of the present invention will be described with reference to FIG.
And a flowchart shown in FIG. The cooling unit temperature T ₁ measured by the cooling unit sensor 12 and the external temperature T ₂ measured by the external sensor 13 are input to the determination circuit 14, and when the cooling unit temperature T ₁ is higher than 0 ° C. Normal dehumidification operation, that is, positive current is supplied to the Peltier element 2, the cooling body 3 is cooled, and the humid air flowing into the case 1 from the intake port 6 by the exhaust fan 8 is cooled.
When passing through the dew point, the moisture in the air is removed,
The dehumidified air cools the radiator 4, becomes dry air, and is discharged from the exhaust port 7. On the other hand, the dew water of the cooling body 3 is drained to the outside by the drain hose 10 through the drain port 11.

Next, when the cooling part temperature T ₁ is 0 ° C. or lower, since the cooling body 3 is frozen, after performing the deicing operation, that is, the normal dehumidifying operation for a long time, for example, 12 hours, A reverse current is applied to the Peltier element 2 for a time of, for example, 10 minutes,
The ice is thawed by generating heat, and the deicing operation is repeatedly performed until the cooling unit temperature T ₁ becomes higher than 0 ° C. In this case, since the icing of the cooling body 3 is thawed, a decrease in the dehumidifying capacity is prevented.

Next, if the temperature difference between the external temperature T ₂ measured by the external sensor 13 and the cooling unit temperature T ₁ , that is, (T ₂ −
When T ₁ ) falls below a predetermined set temperature T ₀ ,
An alarm is output by the alarm means, for example, an alarm sound is generated, and an alarm lamp is turned on and blinked, and the Peltier element 2 is notified of a failure or an abnormal state, thereby achieving long-term maintenance-free inspection. .

Here, for example, when the temperature of the space in which the electronic dehumidifier A is installed, that is, the external temperature T ₂ is 20 ° C. and the set relative humidity is 60%, the air in the space is determined from the psychrometric chart. the dew point was 12 ° C., the difference between the external temperature T ₂ (2
(0 ° C-12 ° C) is 8 ° C. That is, if the cooling unit temperature T ₁ of the cooling body 3 is 12 ° C. or less, moisture in the air is dewed by the cooling body 3 and dehumidified.

In addition, the temperature of the space set in the electronic dehumidifier A
If the temperature is 20 ° C and the set relative humidity is 85%, humid air
From the diagram, the dew point of the air in that space is 17 ° C,
Degree T _TwoTemperature difference (20 ℃ -17 ℃) becomes 3 ℃, cooling
Section temperature T₁Is 17 ° C or less, moisture in the air is cooled
Dew is formed on the body 3 and dehumidified.

Next, the predetermined set temperature T ₀ is set as follows. The temperature difference (T ₂ −T ₁ ) between the external temperature T ₂ and the cooling temperature T ₁ of the cooling body 3 is equal to the Peltier element 2
It is usually about 10 ° C., although it differs depending on the model. Therefore, when the external temperature T ₂ is 20 ° C., the cooling unit temperature T ₁ is 10
In ° C., the temperature difference (20 ° C.-10 ° C.) is 10 ° C. That is, if the temperature difference of (T ₂ −T ₁ ) is about 10 ° C., the Peltier device 2 is operating normally.

Therefore, if the temperature difference of (T ₂ −T ₁ ) becomes extremely smaller than 10 ° C., the Peltier element 2 fails and is in an abnormal state. Therefore, when the failure alarm coefficient is set to 80%, 80% of 10 ° C., that is, 8 ° C. is set as the set temperature T ₀ , and an alarm is output when the temperature difference of (T ₂ −T ₁ ) becomes equal to or less than the set temperature T _0. To The failure alarm coefficient is 80
%, 90%, 70% and other appropriate values.

[0018]

Since the present invention is configured as described above, it has the following effects. Cooling unit sensor 12 for measuring the temperature of the cooling body 3 connected to the cooling surface of the Peltier element 2 is provided, when the cooling unit temperatures T ₁ due to the cooling section sensor 12 is 0 ℃ or less, by thawing operating mode, Since the ice is melted by applying a reverse current to the Peltier element 2, it is possible to prevent a decrease in the dehumidifying capacity due to freezing of the cooling body 3.

Further, an external sensor 13 for measuring the temperature outside the electronic dehumidifier A is provided, and when the temperature difference between the external temperature T ₂ and the cooling unit temperature T ₁ by the external sensor 13 is lower than a predetermined set temperature T _0. Since an alarm is output by the alarm means, the failure of the Peltier element 2 can be immediately detected, and a long-time maintenance-free and inspection-free operation can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a flowchart of FIG.

FIG. 3 is a cut-away side view of the electronic dehumidifier used in FIG.

[Explanation of symbols]

 2 Peltier element 3 Cooling body 12 Cooling unit sensor 13 External sensor

Claims (1)

[Claims] 1. An electronic dehumidifier for dehumidifying a cooling body connected to a cooling surface of a Peltier element by positively energizing a Peltier element, a cooling unit sensor for measuring a temperature of the cooling body, and an outside of the electronic dehumidifier. An external sensor that measures the temperature of the cooling unit; a cooling unit temperature measured by the cooling unit sensor that is higher than 0 ° C .; a dehumidifying operation mode in which the cooling body is dehumidified by positively supplying power to the element; When the temperature is equal to or lower than ℃, after performing a long time dehumidification operation for a predetermined time, a de-icing operation mode in which reverse energization to the element is performed for a predetermined short time, and a temperature difference between the external temperature measured by the external sensor and the cooling unit temperature. And an alarming means for outputting an alarm when the temperature is equal to or lower than a predetermined set temperature.