JPH0628696B2 - Evaluation method of dehumidification capacity of dehumidifier - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for evaluating the dehumidifying ability of a dehumidifier.

[Conventional technology]

A dehumidifier equipped with a Peltier effect element can lower the temperature on the cooling side of the Peltier effect element as the heat radiation on the heating side of the Peltier effect element is better, so the dehumidification capacity depends on the heat radiation of the Peltier effect element. It Therefore, it is necessary to evaluate the dehumidifying ability of the dehumidifier.

FIG. 8 shows a conventional example. That is, the method for evaluating the dehumidifying capacity of this dehumidifier is, for example, a volume of 3.4 (height) mx
4 (depth) m x 1.9 (width) m, temperature 20 ° C, humidity 8
In the 5% constant temperature and humidity chamber equipment 55, the dehumidifier 50 equipped with the Peltier effect element is attached to the mounting base 51, and the water meter 53 is positioned below the drain pipe 52 hanging from the dehumidifier 50. The dew condensation water of the dehumidifier 50 is stored in 53. When the dehumidifying amount of the water 54 accumulated in the water amount meter 53 is measured immediately after the dehumidifier 50 is operated, the graph shown in FIG. 9 is obtained. Therefore, the dehumidification amount d / t ₁ − per unit time is calculated from the saturation region where the dehumidification amount is substantially stable over time, for example, the dehumidification amount d between times t ₁ and t _{2 in} the graph.
t ₂ (cc / h) is obtained, and the dehumidifying capacity of the dehumidifier is evaluated depending on the amount of dehumidification.

[Problems to be solved by the invention]

However, this method of evaluating the dehumidifying ability of the dehumidifier has a drawback that the test time becomes long because it is necessary to measure the dehumidifying amount in a stable state after several hours or more have passed since the dehumidifier 50 started to operate. Further, there is a drawback that a large-sized constant temperature and humidity chamber equipment 55 is required to obtain the dehumidification amount necessary for measurement.

Therefore, an object of the present invention is to provide a method for evaluating the dehumidifying ability of a dehumidifier, which can evaluate the dehumidifying ability in a short time without requiring a large-sized constant temperature and constant humidity tank facility.

[Means for solving problems]

The method for evaluating the dehumidifying ability of the dehumidifier of the present invention is to measure the amount of change in the load impedance of the Peltier effect element at a constant time interval in the initial voltage application of the Peltier effect element of the dehumidifier provided with the Peltier effect element, in advance. The dehumidifying amount per unit time of the dehumidifier is estimated from the obtained correlation of the dehumidifying amount per unit time with respect to the change amount of the load impedance.

[Action]

According to the configuration of the present invention, since the correlation of the dehumidification amount per unit time with respect to the change amount of the load impedance of the Peltier effect element at constant time intervals is obtained in advance from the experimental result, the voltage application initial stage of the Peltier effect element The dehumidification amount can be estimated in a short time by measuring the change amount of the load impedance. Moreover, there is no need for a large-sized constant temperature and humidity chamber equipment as in the past.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 7. That is, the method for evaluating the dehumidifying capacity of the dehumidifier is to measure the amount of change in the load impedance of the Peltier effect element 2 at a constant time interval in the initial period of voltage application to the Peltier effect element 2 of the dehumidifier 1 including the Peltier effect element 2. The dehumidification amount per unit time of the dehumidifier is estimated from the correlation of the dehumidification amount measured and obtained in advance with respect to the amount of change in the load impedance per unit time.

Structurally, the dehumidifier 1 includes, as shown in FIGS. 3 and 5, a Peltier effect element 2, a cooling fin 3 provided on a cooling surface 2 a of the Peltier effect element 2, and a Peltier effect element 2. It has a radiation fin 4 provided on the heat generation surface 2b and a storage case 5. In addition, electrically, the drive circuit is the fourth
As shown in the figure, a transformer T for converting the commercial power source E to a required voltage whose primary side is connected via a fuse H, a rectifier S for converting the direct current to which the secondary side of the transformer T is connected, It has a smoothing capacitor C connected to the output end of the rectifier S, and a Peltier effect element 2 connected to the output end of the smoothing capacitor C.

As shown in FIG. 3, the hanging portions 7 of the cooling fins 3 and the radiation fins 4 are connected by screws 6, and at the same time, the Peltier effect element 2 is sandwiched between the cooling fins 3 and the heat conducting portion 7. Further, as shown in FIG. 5, the storage case 5 has a drain pipe 8 and an air intake port 9 at the lower end thereof, and the Peltier effect element 2 and the cooling fin 3 are stored at the lower end of the storage case 5 to dissipate the heat radiation fins. 4 is arranged so as to be located above the Peltier effect element 2, and further heat-generating components such as the transformer T and the rectifier S are housed above the radiation fins 4. An air outlet 10 is formed at the upper end of the storage case 5.

When a DC voltage is applied to the Peltier effect element 2 by the drive circuit shown in FIG. 4, the cooling surface 2a is cooled and the heat generating surface 2 is cooled.
b heats up. Therefore, when the cooling fins 3 provided on the cooling surface 2a are cooled and the temperature of the surrounding air decreases to a temperature below the dew point, saturated air is formed and dew condensation occurs on the surfaces of the cooling fins 3. When the generated dew condensation increases, it becomes water drops and drops on the lower end of the storage case 5, and is drained from the drain pipe 8. Further, the heat of the heat generating surface 2b is radiated to the heat radiating fins 4 provided on the heat generating surface 2b of the Peltier effect element 2 and the air above the cooling fins 3 is heated by the heat radiating fins 4, so the air rises due to convection. Then, it is discharged from the air outlet 10 of the storage case 5 through the transformer T and the like. For this reason, air is sucked from the new air intake 9 of the storage case 5 and cooled by the cooling fins 3 to cause dew condensation. By such air circulation, dehumidification is performed in the room where the dehumidifier 1 is arranged. Therefore, the dehumidifier 1 provided with the Peltier effect element 2 is effective in dehumidifying water in the air when the humidity is relatively high.

As shown in FIG. 2, the load impedance Z of the Peltier effect element 2 is theoretically determined by connecting a voltmeter V ₁ and an ammeter A ₁ to the input terminal of the drive circuit of FIG. The current I is measured and calculated from V / I.

FIG. 6 is a graph of the load impedance Z with respect to the normal time, and the unit of the load impedance Z is that the value of the load impedance Z in the saturated state is 100%. In this graph, the characteristics Q _{1 to} Q ₃ depend on the quality of the connection between the heat radiation fin 4 and the heat generation surface 2 b of the Peltier effect element 2. That is, if the heat conduction between the heat generating surface 2b and the radiation fins 4 is good, the characteristic Q
Tended to changes in load impedance Z as ₁ decreases, shows a tendency to change in the load impedance Z as characteristic Q ₃ and poor bond to the opposite increases. Quantitatively, the load impedances Z _{1 to} Z ₃ of the characteristics Q _{1 to} Q ₃ at time t ₁ in the initial period of voltage application to the Peltier effect element 2.
And the load impedances Z _{4 to} Z ₆ of the characteristics Q _{1 to} Q ₃ at time t ₂ are given time intervals (t ₂ −
The change amount α ₁ of the characteristic Q ₁ at t ₂ ) is α ₁ = | Z ₄ −
Z ₁ |, the variation alpha ₂ characteristic _{Q 2 α 2 = | Z 5} -Z
₂ |, the variation alpha ₃ characteristic _{Q 3} are alpha ₃ = _| the _{next, α 1 <α 2 <α} 3 | Z 6 -Z 3.

FIG. 7 shows the change amounts α _{1 to} α of the load impedance Z.
The correlation of the dehumidification amount per unit time with respect to ₃ is shown.
This graph is an experimental result obtained by measuring the dehumidification amount per unit time of the dehumidifier having the characteristics Q _{1 to} Q ₃ by the conventional method, and graphs α _{1 to} α ₃ and the dehumidification amount. It is a thing. As is clear from this result, it is understood that the dehumidification amount with respect to the variation amounts α _{1 to} α ₃ of the load impedance Z exhibits linearity. Therefore, by measuring the load impedance at the time point t ₁ and the time point t _{2 in} the initial period of voltage application of the Peltier effect element 2, the change amount of the load impedance at constant time intervals is measured, and the dehumidification is performed by using the correlation of the graph. The quantity can be estimated.

FIG. 1 shows an embodiment of the dehumidifying capacity evaluation test apparatus of the dehumidifier 1, where COM is a personal computer, K is a keyboard thereof, and Ry is a relay controlled by the personal computer COM, and a normally open contact of the relay Ry. r is inserted in the input side of the dehumidifier 1. V ₂ is an electronic voltmeter that outputs a digital signal, A ₂ is also an electronic ammeter, and the personal computer CO is connected by the data bus B.
It is connected to M.

The relational expression of the correlation of the dehumidification amount per unit time with respect to the change amount of the load impedance is input to the personal computer COM from the keyboard K, the dehumidifier 1 to be evaluated is connected to the connection terminal P, and the keyboard R relays Ry. Is operated, the input voltage is applied to the dehumidifier 1, the voltage and the consumption current at the initial voltage application are measured by the electronic voltmeter and the electronic ammeter A _{2, and} from these, the initial voltage application time points t ₁ and t The load impedance Z of No. ₂ is calculated, and the change amount of the load impedance Z at constant time intervals is calculated as described above. Furthermore, the dehumidification amount per unit time is calculated by substituting the obtained change amount of the load impedance Z into the relational expression of the above correlation, and the calculation result is stored and displayed / recorded by a display means (not shown).

According to this embodiment, the correlation of the dehumidification amount per unit time with respect to the change amount of the load impedance of the Peltier effect element 2 at constant time intervals is obtained in advance from the experimental result. The dehumidification amount can be estimated in a short time by measuring the change amount of the load impedance. Moreover, there is no need for a large-sized constant temperature and humidity chamber equipment as in the past.

Although the load impedance Z is the impedance due to the voltage and current consumption at the input end of the drive circuit, it may be the load impedance of only the Peltier effect element 2.

〔The invention's effect〕

According to the dehumidifying capacity evaluation method of the dehumidifier of the present invention, since the correlation of the dehumidifying amount per unit time with respect to the change amount of the load impedance of the Peltier effect element at a constant time interval is obtained in advance from the experimental result, The dehumidification amount can be estimated in a short time by measuring the change amount of the load impedance in the initial stage of voltage application to the effect element.
In addition, there is an effect that a large-sized constant temperature and humidity chamber equipment as in the past is not required.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a dehumidifying capacity evaluation test apparatus for a dehumidifier according to an embodiment of the present invention, FIG. 2 is a circuit diagram for measuring a load impedance of a Peltier effect element, and FIG. 3 is an internal part of the dehumidifier. FIG. 4 is a partially exploded perspective view, FIG. 4 is a drive circuit diagram of a Peltier effect element, FIG. 5 is a schematic cross-sectional view of a dehumidifier, FIG. 6 is a conduction time characteristic diagram of load impedance, and FIG. Fig. 8 is a correlation diagram of the dehumidification amount, Fig. 8 is an explanatory diagram of a conventional example, and Fig. 9 is a conduction time characteristic diagram of the dehumidification amount. 1 ... Dehumidifier, 2 ... Peltier effect element

Claims (1)

[Claims] 1. A dehumidifier having a Peltier effect element, wherein a change amount of a load impedance of the Peltier effect element at a constant time interval is measured at an initial stage of voltage application to the Peltier effect element, and a change in the load impedance obtained in advance is measured. A method for evaluating dehumidification capacity of a dehumidifier, comprising estimating a dehumidification amount per unit time of the dehumidifier from a correlation between the amount of dehumidification per unit time.