JPH03151017A - Dehumidifier - Google Patents

Abstract

PURPOSE:To operate the dehumidifier in an optimum condition at any time and to sharply improve the dehumidifying efficiency by controlling the number of revolutions of a blower according to the temp. difference between dry and wet bulbs of the introduced air and making the air flow rate variable. CONSTITUTION:There are provided the refrigerant cycle in which a compressor 1, a condenser 2, a throttle unit 3 and a cooler 4 are connected in that order by a refrigerant piping 5, and the blower 10 blowing air from the cooler 4 to the condenser 2. A 1st sensor 14 detects the dry bulb temp. of the air flowing into the cooler 4 to output a signal and a 2nd sensor 15 detects the wet bulb temp. of the same flowing-in air. A controller 13 of number of revolutions controls the number of revolutions of the blower 10 according to the signals of sensors 14, 15. As the air flow rate is variably controlled by controlling the number of revolutions of the blower according to the temp. difference be tween dry and wet bulbs of the introduced air the humidifier is operated in an optimum condition at any time, and the dehumidifying efficiency is sharply improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dehumidifying device that is used to apply a refrigeration cycle to reduce the humidity in a room and thereby dry articles. This is related to the improvement of.

[Conventional technology]

This type of dehumidifier uses a well-known refrigeration cycle to cool the air with a cooler, condensing moisture in the air to lower the absolute humidity, and then heating it with a condenser. This reduces relative humidity.

[Problem to be solved by the invention]

However, when such a dehumidifying device is used in a place where the relative humidity of the atmosphere fluctuates over a wide range, such as a warehouse, there is a problem that efficient operation is not always possible for the following reasons. In other words, if the inflow air is operated at an efficient air volume when the dry/wet bed temperature difference is small (relative humidity is high), but the dry/wet bed temperature difference is large, the sensible heat ratio will increase, and the amount of dehumidification will decrease or dehumidification will not be possible. It disappears. On the other hand, if the air volume is reduced in accordance with low humidity, there is a problem in that the amount of dehumidification during high humidity is reduced.

This invention aims to solve the above-mentioned problems, and allows efficient operation at all times even if the relative humidity of the atmosphere changes. The purpose is to obtain a dehumidifying device.

[Means to solve the problem]

The dehumidifier according to the present invention changes the flow rate of air by detecting the wet and dry bulb temperature of the air flowing into the cooler and controlling the rotational speed of the blower that circulates the air according to the condition. This is what I did.

[Effect]

In the dehumidifying device of this invention, the rotation speed of the blower is variable according to the wet and dry bulb temperature of the air flowing into the cooler.
Efficient driving becomes possible.

〔Example〕

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

In Figure 1, (1) is a compressor, (2) is a condenser, (
3) is a throttle device, and (4) is a cooler, which are successively communicated through a refrigerant pipe (5) to form a refrigerant cycle. (10) is connected from the cooler (4) to the condenser (2).
αD is a power source, α2 is an electric line, and a blower rotation speed controller (13) is provided in the middle of this electric line. α4 is a blower that circulates air to the cooler (4). A first sensor detects the dry bulb temperature of the incoming air (11 is a second sensor that detects the dry bulb temperature of the incoming air, and inputs its detection signal to the rotation speed controller Q3. (No. 13 uses a well-known triac, and is designed to vary the cutting rate of the power supply waveform.

FIG. 2 shows a characteristic diagram of this rotational speed controller. In other words, when the psychrometric temperature difference of the incoming air is small, the cut rate is 0 or small, and the effective voltage is high, so the fan rotation speed is also high.On the other hand, when the psychrometric temperature difference is large (the cut rate is As the rotation speed increases, the effective voltage becomes low (and the rotation speed of the blower decreases.In addition to the triac, an inverter, a transformer, etc. may be used for this rotation speed control.

〔Effect of the invention〕

As described above, according to the present invention, the rotational speed of the blower is controlled according to the wet/dry temperature difference of the incoming air, and the air volume is made variable, so that the blower can always be operated in an optimal state.

This has the effect of greatly increasing dehumidification efficiency.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of a dehumidifying device according to an embodiment of the present invention. FIG. 2 is a characteristic diagram of the rotation speed controller. In the figure, (1) is a compressor, (2) is a condenser, (3) is a throttle device, (4) is a cooler, α0) is a blower, α3 is a rotation speed controller, α4 is a dry bulb temperature sensor, 1 is a dry bulb temperature sensor.

Claims (1)

[Claims] A refrigerant cycle in which a compressor, a condenser, a throttle device, and a cooler are sequentially connected through refrigerant piping, and a blower that circulates air from the cooler to the condenser, the air flowing into the cooler. a first sensor that detects the dry bulb temperature of the incoming air and sends a signal; a second sensor that detects the wet bulb temperature of the incoming air; and a second sensor that detects the wet bulb temperature of the incoming air; A dehumidifier including a rotation speed controller that controls the rotation speed.