JPS59212651A - Dehumidifier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a dehumidifying table 1u mainly used for drying.
Must be related to.

A conventional dehumidifier was constructed as shown in FIG.

In FIG. 1, 1 is a compressor, 2 is a condenser, 3 is a capillary tube, and 4 is a cooler, and these are interconnected through refrigerant piping to form a refrigeration cycle 5. When a dehumidifying device configured in this way is used to dry items, it has the disadvantage that it takes time for the humidity in the drying chamber to reach the desired level.For example, when drying wood, the relative humidity in the drying chamber is initially low. It will be close to 100 inches. However, wood used for furniture and the like must have a moisture content of about 10 cm, and to achieve this, drying rooms must be kept at low humidity. If you select a capillary tube that can achieve a low ultimate humidity, the evaporation temperature of the cooler 4 will also be low and the amount of refrigerant circulation will be small, so the dehumidification capacity at high humidity will be low and it will take time to reach the ultimate humidity. There was a drawback. Furthermore, at the beginning of operation in winter, the room temperature is low. For this reason, the heat exchange temperature difference in the cooler 4 is small and the amount of heat exchange is small, so there is also the problem that liquid backflow to the compressor 1 is likely to occur.

This invention was made in view of these circumstances.
By changing the resistance of the squeezing device, we provide a dehumidifying device that can handle low humidity in the past, has a high dehumidifying capacity when the humidity is high, and does not cause liquid splashes to the compressor when the room temperature is low. It is intended to.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the invention. This is a block diagram of the dehumidification device, and in FIG. 2, 1 is a compressor of a refrigeration cycle, 2 is a condenser, and 4 is a cooler, which are the same as those of the conventional one. 5id a first capillary reach tube connected in parallel with the bypass circuit 7a, 7 a solenoid valve provided in the bypass circuit 7a, and 6 a second capillary reach tube connected in series with the first capillary reach tube 5. It constitutes an aperture device 8 with variable resistance. 9 is a humidity controller that detects the humidity of the air flowing into the cooler 4, and 1° is a temperature regulator that detects the temperature of the air that flows into the cooler 4. Both of them have a detection unit near the cooler 4. 9a and detection unit 10
a is arranged. FIG. 8 shows the relevant part of the electric circuit of the embodiment shown in FIG. 2. In Fig. 8, 9-1 is a contact point of the humidity controller 9. For example, it opens when the relative humidity of the air flowing into the cooler 4 decreases to 40%, and closes when the relative humidity increases and reaches 50%. do it like this. Reference numeral 10-1 denotes a contact point of the temperature regulator 10, which opens when the temperature of the air flowing into the cooler 4 is below 20°C, and closes when the temperature rises to 25°C. 7-1 is an electromagnetic coil of the electromagnetic valve 7, and the electromagnetic valve 7 is opened when energized. 11 is a power supply, contact 9 of humidity controller 9
-1, contact 10-1 of temperature regulator 10, electromagnetic coil 7
-1 is connected in series.

Next, the operation of the embodiment shown in FIGS. 2 and 8 will be explained. For example, when drying wood, initially the drying chamber is in a high humidity state where the ratio of +1 to humidity is close to 100% due to moisture evaporated from the wood. However, the indoor temperature is almost equal to the outdoor temperature, which is below 20'0 in winter. In this case, the contact 9-1 of the humidity controller 9 is closed, but the contact 1o-1 of the temperature controller 1o is open, so the electromagnetic coil 7
-1 is not energized, so the solenoid valve 7 is closed 9 and the refrigerant flows through the refrigeration cycle through the first capillary reach tube 5 and the second capillary reach tube 6. In this way, when the temperature of the air flowing into the cooler 4 is low, the throttle resistance is increased to reduce the amount of refrigerant supplied to the cooler 4, and the evaporation temperature is lowered to widen the heat exchange temperature difference. , allowing all of the refrigerant to evaporate in the cooler 4. This prevents the compressor 1 from backing up even after the start of operation.

If this operation continues, the room temperature will rise due to the heating effect of the dehumidifier due to the heat generated by the compressor 1 equivalent to the human power. When the temperature rises to 25°C, contact 1o-1 closes.

Note that as the room temperature rises, the amount of moisture evaporated from the wood grains increases, so the humidity is close to 114% humidity. Therefore, since contact 9-1 is also closed, "I'Ii:
The magnetic valve 7 is opened, and the refrigerant flows through the bypass circuit 7ajyohi No. 2.
It flows through the refrigeration cycle through the capillary reach tube 6. As described above, when the room temperature is high, the heat exchange capacity of the cooler 4 is large, so even if the resistance of the throttle 9 is made small σ and the amount of refrigerant circulation is increased, all of the refrigerant evaporates in the cooler 4. Through this operation, when the wood becomes dry and the relative humidity of the indoor air decreases, the contact 9-1 opens and the electromagnetic coil 7-1 is no longer energized, so the electromagnetic valve 7 closes and the refrigerant flows through the first It flows through the capillary reach tube 5 and the second capillary reach tube 6. When the humidity inside the drying chamber is high as described above, the dew point temperature is high, so even if the surface temperature of the coil of the cooler 4 is high, dehumidification can be performed. Therefore, the resistance of the expansion device 8 is made smaller than when the humidity is low, and the evaporation temperature of the cooler 4 is made higher. In this way, the amount of refrigerant circulated is reduced, the refrigeration capacity is increased, and the dehumidification capacity is also increased. Furthermore, when the humidity of the air in the drying chamber decreases, the resistance of the squeezing device 8 is increased to maintain a low humidity state.

As explained above, the dehumidifier of the present invention includes a diaphragm device with variable resistance in the refrigeration cycle, and when the humidity detected by the humidity controller and the temperature detected by the temperature controller each exceed a predetermined value, By reducing the resistance of the expansion device, it has a high removal capacity at times of high humidity, achieves low humidity levels, and prevents liquid from leaking into the compressor when the room temperature is low at the start of operation. This effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional dehumidifier, FIG. 2 is a block diagram of a dehumidifier according to an embodiment of the present invention, and FIG. 8 is an electric circuit diagram of the dehumidifier shown in FIG. 1 Compressor, 2... Condenser, 4... Cooler, 5.6-
Capillary tube, 7... Solenoid valve, 7a... Bypass circuit, 8... Squeezing device, 9... Humidity controller 1
9-1 Contact point of humidity controller, 7-1... Electromagnetic coil,
10...Temperature regulator, 10-1...Temperature regulator contact. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa

Claims (1)

[Claims] A refrigeration cycle in which a compressor, a compressor, a throttling device with variable resistance, and a cooler are sequentially connected through refrigerant piping, a humidity controller that operates by detecting the humidity of the air flowing into the cooler, and the above. and a temperature regulator that is activated by detecting the temperature of the air flowing into the cooler, and when the humidity detected by the humidity regulator and the temperature detected by the temperature regulator each exceed a predetermined value, the resistance of the throttle device increases. I tried to make it smaller,
A dehumidifying device characterized by.