JP2000042343A - Air dehumidifying device and its controlling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air dehumidifying device capable of suppressing moreover energy consumption throughout the year and to provide its controlling method. SOLUTION: In the air dehumidifying device executing dehumidification by combining a refrigeration air dehumidifying part 10 cooling and dehumidifying compressed air 70 and an adsorption air dehumidifying part 30 dehumidifying the compressed air 70 by passing through an adsorption column in which an adsorative material is housed, the device is constituted so that the adsorption air dehumidifying part 30 can be actuated independently, and when an open air temp. is low in winter, etc., the refrigerating cycle 18 of the refrigeration air dehumidifying part 10 is stopped to reduce the energy consumption. Moreover, a regenerated air quantity is controlled intermittently by detecting the humidity at an outlet air 72 to reduce the reaenerated air quantity even usual and to reduce the energy consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air dehumidifier capable of supplying dry air in combination with a refrigeration air dehumidifier and an adsorption air dehumidifier.

[0002]

2. Description of the Related Art A compressed air supply system using an air compressor as an air supply source to supply clean compressed air used in the manufacturing process of pharmaceuticals and semiconductor products, for instrumentation control, and the like. Used.
In this compressed air supply system, the compressed air discharged from the air compressor passes through an air dehumidifier (air dryer) to remove moisture and is supplied as dry air.

FIG. 4 shows an example of an air dehumidifier 98. In the air dehumidifier 98, a refrigeration air dehumidifier 80 is disposed on the upstream side for receiving the compressed air 70 from the air compressor 5, and a suction type air dehumidifier 9 is located downstream thereof.
0 is set.

The refrigeration air dehumidifier 80 includes a cooling dehumidifier 81 for cooling the compressed air 70 supplied from the air compressor 5, and a refrigeration cycle 89 for cooling the cooling dehumidifier 81. The refrigeration cycle 89 includes a capillary tube 86 that expands the refrigerant and supplies it to the cooling and dehumidifying unit 81 to cool the cooling and dehumidifying unit 81, a compressor 84 that compresses the expanded refrigerant, and a condenser that radiates heat of the compressed refrigerant. The container 82 is provided.

The adsorption type air dehumidifier 90 has two adsorption towers 41 and 42 for cyclically performing the adsorption and regeneration steps.
A four-way valve 46 is provided at the inlet of each of the adsorption towers 41 and 42, and a shuttle valve 38, which is a three-way valve, is provided at the outlet. The four-way valve 46 includes two adsorption towers 4.
Compressed air supplied from a refrigeration air dehumidifier 80 is flowed to one of 1 and 42 to perform adsorption and dehumidification, and the other adsorption tower is connected to a silencer 48 to discharge the regenerated air to the outside air. ing. The shuttle valve 38 connects the adsorption tower on the side of the adsorption tower 41 or 42 on which adsorption and dehumidification is performed to an output pipe so that dehumidified air can be output. The outlets of the adsorption towers 41 and 42 are connected by a pipe P4 having an orifice 37 in the middle thereof.
The regeneration air 72a is sent from the adsorption tower to the regeneration tower. The pipe P4 is disposed so as to pass through the condenser 82 of the refrigeration cycle 89 of the refrigeration air dehumidifier 80, and the regeneration air 72a is heated by the heat of the condenser 82.

In such an air dehumidifier 98,
First, the refrigeration air dehumidifier 80 uses the air compressor 5
The high-temperature and high-humidity air sent from is cooled to about 20 ° C. and dehumidified. That is, the moisture content of the refrigeration air dehumidifier 80 is 2
The compressed air dehumidified to the saturation humidity of 0 ° C. is sent to the adsorption-type air dehumidifier 90. The compressed air is further dehumidified by an adsorption-type air dehumidifier 90, and as a result, the dew point becomes -40C.
A very dry compressed air of ~ 70 ° C is produced, and this is used as air for production or air for measurement control. In such an air dehumidifier 98, the air dehumidified to a certain extent by the refrigeration air dehumidifier 80 is supplied to the adsorption air dehumidifier 90.
0 load is reduced. Therefore, the adsorption-type air dehumidifier 90 can be reduced in size and can stably supply dry air having a low dew point.

[0007] In the adsorption type air dehumidifier 90,
In order to regenerate the adsorbent, it is necessary to flow dry air. In this case, in the system shown in FIG. 4, the air for regeneration is heated by the condensation heat generated from the condenser 82 of the refrigeration air dehumidifier 80. A predetermined reproduction efficiency is realized. Therefore,
In the air dehumidifier 98 shown in FIG. 4, the refrigeration air dehumidifier 80 has a function of pre-cooling and dehumidifying, and has a role of heating the regenerated air.

[0008]

A compressed air supply system including such an air dehumidifier must always operate while compressed air is consumed in a manufacturing process or the like. Therefore, since the air dehumidifier also operates continuously day and night, the energy saving effect by reducing energy consumption is great, and is important in reducing running costs. Therefore, in the air dehumidifier 98 shown in FIG. 4, the waste heat of the condenser 82 of the refrigeration air dehumidifier 80 can be recovered as a heat source for regeneration of the adsorption air dehumidifier 90.
Energy consumption has been reduced.

However, there is always a demand for an air dehumidifier capable of obtaining a greater energy saving effect and reducing running costs.

Therefore, in the present invention, the structure and control of an air dehumidifier combining a refrigeration air dehumidifier and an adsorption air dehumidifier are further studied to provide an air dehumidifier with a greater energy saving effect. It is an object.

[0011]

For this reason, the present inventors have reconsidered the operating conditions of an air dehumidifier in which a refrigeration air dehumidifier and an adsorption air dehumidifier are combined. There is a state where the inlet air temperature of the air dehumidifier is almost equal to the inlet temperature condition of the adsorption air dehumidifier, and even if the refrigeration air dehumidifier is stopped, no extra load is applied to the adsorption air dehumidifier more than designed. It has been found that there is a state in which the function of the air dehumidifier does not need to be deteriorated. However, in the above-described conventional air dehumidifier, when the refrigeration air dehumidifier is stopped, the regeneration air cannot be heated, and the regeneration efficiency decreases, and the predetermined regeneration efficiency cannot be realized. Can not stop.

Therefore, in the air dehumidifying apparatus of the present invention, a refrigeration air dehumidifying section capable of cooling and dehumidifying compressed air, and the compressed air supplied from the refrigerated air dehumidifying section are passed through the adsorption layer to dehumidify. An adsorption type air dehumidifying unit is provided, and the adsorption type air dehumidifying unit can be operated independently, and the refrigeration type air dehumidifying unit stops the refrigeration system when the inlet air temperature is low. In addition, the control method of the air dehumidifier of the present invention includes a refrigeration air dehumidifying unit capable of cooling and dehumidifying compressed air, and an adsorbent for dehumidifying compressed air supplied from the refrigerated air dehumidifying unit through an adsorption layer. And an adsorption type air dehumidifying unit, which is a control method of an air dehumidifying device that can operate independently, and is provided when the inlet air temperature of the refrigerated air dehumidifying unit is low. It is characterized by having a power saving step of stopping the refrigeration system.

[0013] By combining the adsorption-type air dehumidifying unit, which can be operated alone, with the refrigeration air dehumidifying unit to form an air dehumidifying device, when the low-temperature outside air is compressed and supplied, such as in winter, the refrigeration is performed. The air dehumidifier can be stopped,
Even if such control is performed, the adsorption-type air dehumidifying unit can be operated normally to output dry air under predetermined conditions. Therefore, by stopping the refrigeration system of the refrigeration air dehumidifying unit, the energy consumed in the refrigeration air dehumidifying unit during that period can be reduced, and an air dehumidifying device with a high energy saving effect can be provided.

Further, since the adsorption type dehumidifying unit can be operated independently, a piping connecting the refrigeration type dehumidifying unit and the adsorption type dehumidifying unit is not required, so that the configuration is simplified and the air dehumidifying device is supplied at a low cost. it can. Therefore, according to the present invention, it is possible to provide an air dehumidifier, which is a combination of a refrigeration dehumidifier and an adsorption dehumidifier capable of stably supplying dry air, and has a high energy saving effect at a low cost.

The temperature at which the refrigeration system of the refrigeration air dehumidifying section of the present invention is stopped is preferably such that the inlet air temperature of the air dehumidifier is the inlet design temperature of the adsorption air dehumidifying section. If the temperature is equal to or higher than the inlet design temperature, an excessive load may be applied to the adsorption-type air dehumidifying unit, and the grade of the output dry air may be reduced. On the other hand, when the temperature is equal to or lower than the inlet design temperature, an excessive amount of excess is generated in the adsorption-type air dehumidifying unit, so that the energy saving effect is reduced.

Further, focusing on the adsorption-type air dehumidifying section, it is necessary to regenerate air by flowing regeneration air from the first adsorption layer performing the adsorption dehumidification to the second adsorption layer. On this occasion,
Conventionally, a fixed amount of regeneration air is continuously supplied to the second adsorption layer on the regeneration side while the first adsorption layer performs adsorption and dehumidification. That is, the very dry air immediately after the first adsorption layer starts dehumidification is also consumed for regeneration, like the air with a not so high dryness immediately before switching to regeneration. Therefore, in the present invention, firstly, when the humidity (dew point) of the adsorption layer is low, the amount of regeneration is reduced or stopped to prevent wasteful consumption of high-quality dry air. I have. That is, in the air dehumidifier of the present invention, the adsorption-type air dehumidifier,
A first adsorbent layer through which the compressed air supplied from the refrigeration air dehumidifier passes, a second adsorbent layer for regenerating by flowing a part of the outlet air of the first adsorbent layer, and a first adsorbent layer. When the humidity of the outlet air is low, a regenerating means for reducing the amount of air flowing to the second adsorption layer is provided. Further, in the control method of the air dehumidifying device of the present invention, in the adsorption-type air dehumidification unit, a part of the outlet air of the first adsorption layer through which the compressed air supplied from the refrigeration-type air dehumidification unit is passed is supplied to the second unit. When the adsorbent layer is regenerated, an air-saving step for reducing the amount of air flowing to the second adsorbent layer when the humidity of the outlet air of the first adsorbent layer is low is provided.

Such an air dehumidifier of the present invention shuts down the refrigeration system of the refrigeration air dehumidifier during the time when pre-cooling and dehumidification of the compressed air is not required, such as in winter, The amount of air is controlled by the degree of drying (dew point). Therefore, according to the present invention, it is possible to further reduce energy consumption throughout the year,
It is possible to provide a low air dehumidifier and a method of controlling the air dehumidifier that can reduce running costs. Furthermore, it is possible to provide a simplified air dehumidifier that can be supplied at low cost and a control method thereof.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an air dehumidifier according to the present invention. The air dehumidifier 1 of the present embodiment is capable of removing the moisture of the compressed air 70 supplied from the air compressor 5 and supplying the dry air 72 having a very low dew point, for example, about −40 ° C. to −70 ° C. is there. For this reason, in the air dehumidifier 1 of the present invention, the refrigeration air dehumidifier 10 and the adsorption air dehumidifier 30 are installed in order from the air compressor 5 side, and these are combined to have a high degree of dryness (low dew point). Air is supplied.

The refrigeration type air dehumidifying section 10 of this embodiment includes a cooling dehumidifying section 20 for cooling the compressed air 70 supplied from the air compressor 5 and a refrigeration cycle 18 for cooling the cooling dehumidifying section 20. The refrigeration cycle 18 expands the refrigerant and supplies it to the cooling and dehumidifying unit 20, and cools the cooling and dehumidifying unit 20 by a capillary tube 26, a compressor 14 that compresses the expanded refrigerant, and a condenser 11 that radiates heat of the refrigerant. A blower fan 12 for dissipating the heat of the condenser 11 is provided.

The adsorption type dehumidifying section 30 is provided with two adsorption towers 41 and 42 for cyclically performing the adsorption and regeneration steps at different timings. A four-way valve 46 is provided at the inlet side of these adsorption towers 41 and 42. The adsorption and regeneration steps are switched and performed. That is, the four-way valve 46 performs the adsorption and dehumidification by flowing the compressed air 70 from the refrigeration air dehumidifier 10 to one of the two adsorption towers 41 or 42 (the adsorption tower 41 in FIG. 1), and performs the other (the adsorption in FIG. 1). The tower 42) is connected to a silencer 48 to release the air after regeneration into the outside air. By operating the four-way valve 46, the adsorption tower for adsorption and the adsorption tower for regeneration can be switched. It has become.

On the other hand, a shuttle valve 38 capable of selecting one of the adsorption towers and outputting the dried air 72 is provided at the outlet side of the adsorption towers 41 and 42.
The outlets of the adsorption towers 41 and 42 are connected by a pipe P4 via a regeneration air valve 36 and an orifice 37, and the dry air 72 is supplied from the adsorption tower performing adsorption and dehumidification to the adsorption tower being regenerated. Part of air for regeneration 7
It functions as a reproducing unit 40 that supplies the signal as 2a. Further, the adsorption type air dehumidifying unit 30 of the present embodiment is used.
In, the air for regeneration is not extended to the condenser 11 of the refrigeration air dehumidifier 10, and the adsorption tower can be regenerated without heating the regeneration air by the condenser 11. For this reason, the regeneration efficiency decreases slightly, and the amount of air flowing to the adsorption tower during regeneration increases. However, in the conventional air dehumidifier, the regeneration air is continuously supplied while performing the adsorption dehumidification as described above,
An excessive amount of regeneration air has been consumed. Therefore, even in the adsorption dehumidifying section of the present embodiment in which the regeneration air is not heated, the regeneration can be performed without increasing the amount of air consumed for regeneration so much. Conversely, the adsorption type air dehumidifying unit 3 of this example
At 0, the regeneration air amount is adjusted by the regeneration air valve 36 so that the regeneration air amount can be appropriately maintained, as described in detail below. As described above, in the air dehumidifier 1 of the present embodiment, the system of the adsorption-type air dehumidification unit 30 is separated from the system of the refrigeration-type air dehumidification unit 10 so that the adsorption-type air dehumidification unit 30 can operate alone. Thus, the refrigeration air dehumidifying section 10 can be turned on and off at an appropriate timing as described later.

The air dehumidifier 1 of the present embodiment includes a control unit 50 for controlling the refrigeration air dehumidification unit 10 and the adsorption air dehumidification unit 30. As shown by a broken line in FIG. Control of each part of 10 and adsorption type air dehumidifying part 30 is performed collectively. This control unit 50
First, by controlling the compressor 14 and the blower fan 12 constituting the refrigeration cycle 18 of the refrigeration air dehumidification unit 10, the operation of the refrigeration cycle 18 can be on / off controlled, and the refrigeration air dehumidification unit 10 is operated and stopped. be able to. Further, by controlling the four-way valve 46 and the shuttle valve 38 of the adsorption-type air dehumidification unit 30, the adsorption and regeneration steps of the adsorption-type air dehumidification unit 30 can be switched and controlled. Further, the controller 50 of the air dehumidifier 1 of the present embodiment includes a signal from the temperature sensor 22 for detecting the inlet air temperature of the refrigeration air dehumidifier 10 and a dry air 72 output from the adsorption air dehumidifier 30. A signal from a humidity sensor 32 of ceramic type or the like capable of detecting the humidity of the air is inputted, and a regeneration air valve 36 provided in a regeneration air pipe P4 is controlled to be sent to an adsorption tower on the regeneration side. The amount of the air 72a can be controlled.

FIG. 2 is a flowchart showing an outline of a control method in the air dehumidifier 1 of the present invention.
First, in step ST10, the refrigeration air dehumidifying unit 3
The inlet air temperature t of 0 is detected by the temperature sensor 22, and the control unit 50 determines whether the temperature is equal to or lower than the reference temperature ta. As the reference temperature ta, a design temperature of the inlet air of the adsorptive air dehumidifying unit 30, for example, 20 ° C., is selected. If it is higher than ta, step ST
At 11, the refrigeration cycle 18 is operated to perform dehumidification at the refrigeration air dehumidifier 10, and the preliminarily dehumidified air is supplied to the adsorption-type air dehumidifier 30 for further drying. On the other hand, the inlet air temperature t is equal to the inlet design temperature ta of the adsorption type air dehumidifier 30.
If it is lower than this, dry air under predetermined conditions can be obtained even if it is supplied to the adsorption-type air dehumidifier 30 without preliminary dehumidification in that state. Therefore, step ST1
In step 2, the control unit 50 stops the compressor 14 and the blowing fan 12, and sets the refrigeration cycle 1
Stop 8. Then, the compressed air is supplied to the adsorption-type air dehumidifying unit 30 without performing the preliminary dehumidification. As described above, in the air dehumidifier 1 of the present embodiment, the adsorption type air dehumidifier 30 is used.
Can be operated independently of the refrigeration air dehumidifier 10, so that the refrigeration air dehumidifier 10 can be stopped when the inlet air temperature t is low.

As described above, in the air dehumidifying apparatus 1 of the present invention, for example, in a condition where the outside air temperature is low in winter or the like and the inlet air temperature of the compressed air dehumidifying unit 10 after compression is sufficiently low, Refrigeration cycle 18 of air dehumidifier 10
(Power saving step) to minimize the operation period of the refrigeration cycle 18 and reduce the power consumed by the compressor 14 or the blower fan 12. While the refrigeration cycle 18 is stopped, the compressed air 70 can be caused to flow so as to bypass the cooling and dehumidifying unit 20. However, when supersaturated compressed air is supplied from the air compressor 5, the cooling and dehumidifying unit 20 is turned off. Since water droplets and the like can be physically removed simply by passing through, it is desirable to always pass through the cooling and dehumidifying unit 20. Also,
Since a bypass pipe or a switching valve is not required, it is preferable in that respect.

As described above, while monitoring the inlet temperature of the refrigerating air dehumidifying section 30, the air dehumidifying apparatus 1 of this embodiment also controls the regeneration air. Therefore, in step ST20, the control unit 50 sets the adsorption type dehumidifying device 30
The humidity sensor 32 detects the degree of dryness of the dry air 72, that is, the dew point T, and determines whether the dew point T is equal to or lower than a predetermined dew point Tb. As the reference temperature Tb, an average dew point of the dry air output from the adsorption-type air dehumidifying unit 30, for example, -40 ° C is set. If the dew point T of the output air 72 is very dry at or below the reference temperature Tb, the regeneration air valve 36 is closed and no regeneration air flows in step ST21. Adsorption type air dehumidifying unit 30 of this example
Is designed to be sufficiently regenerated with dry air with an average dew point supplied as regeneration air, so that low dew point, high quality dry air does not have to be consumed as regeneration air. Has become. Further, the situation where the dew point of the dry air is low is immediately after the adsorption tower is switched, and there is no need to rush regeneration. Therefore, step ST21
While high-quality dry air is being output, an air-saving process is provided to prevent the air from being consumed as regeneration air. In step ST21, instead of fully closing the regeneration air valve 36, it is also possible to reduce the amount of self-consumption of high-quality dry air by flowing a small amount of regeneration air according to the degree of drying.

On the other hand, if the detected dew point T is higher than the reference temperature Tb in step ST20, the quality of the dry air is slightly degraded and the dew point is an average value. The valve 36 is opened to perform regeneration by supplying a predetermined amount of regeneration air 72a,
Prepare for switching of adsorption tower.

In step ST30, if the humidity of the dry air output from the adsorption type air dehumidifier 30 becomes higher than the design humidity and the dew point T detected by the humidity sensor 32 exceeds the reference temperature Tc or more, step ST3.
In step 1, the control unit 50 switches the four-way valve 46 and the shuttle valve 38 to exchange the adsorption tower performing the adsorption and dehumidification with the adsorption tower being regenerated. Then, adsorption and dehumidification are performed in the regenerated adsorption tower, so that dry air of a predetermined quality can be continuously output. By repeating such steps, high-quality dry air is continuously supplied from the air dehumidifier 1 of the present example.

FIG. 3 schematically shows changes in energy consumed by the operation of the air dehumidifier 1 of the present embodiment. FIG. 3A shows a change in energy consumption in winter and summer. For example, if the amount of energy consumed by an air dehumidifier that performs dehumidification only with an adsorption-type air dehumidifier is E5 (although the energy of an air compressor is equivalent to the amount of air consumed for regeneration), On the other hand, in the air dehumidifier that combines the adsorption type air dehumidifier and the refrigeration type air dehumidifier as shown in FIG. 4, the energy for driving the refrigeration cycle increases, but the amount of regeneration air is greatly reduced. Therefore, the overall energy consumption is reduced to about E4.

On the other hand, in the air dehumidifier 1 of the present embodiment, the refrigeration cycle 18 is stopped in winter, when the outside air temperature is low, such as January or December, because the inlet temperature of the refrigeration air dehumidifier becomes low. can do. Therefore, the energy consumed in the refrigeration cycle 18 can be reduced, and the consumed energy can be reduced to about E3. Furthermore, in the adsorption-type air dehumidifying section 30 of the present example, the energy consumed as the regeneration air is reduced by intermittently supplying the regeneration air to the adsorption tower on the regeneration side. That is, when the regeneration air is stopped, the energy consumption of the air compressor corresponding to the amount of air is reduced. For this reason, in winter, energy consumption can be reduced to about E1 in addition to the energy saving effect obtained by stopping the refrigeration cycle. Also, 8
Even during the summer months when the outside air temperature is high such as the moon, an energy saving effect can be obtained by intermittently supplying the regeneration air, so that the energy consumption can be reduced to about E2. Therefore, as shown in FIG. 3 (b), the energy consumption of the air dehumidifier 1 of the present embodiment throughout the year is low in winter and slightly increased in summer, but throughout the year, only the air of the conventional adsorption-type air dehumidifier is used. It can be lower than a dehumidifier or an air dehumidifier combining a refrigeration air dehumidifier and an adsorption air dehumidifier.

As described above, in the air dehumidifier 1 of the present embodiment, the adsorption type air dehumidifier 30 can be operated independently of the refrigeration type air dehumidifier 10, so that the refrigeration can be performed when the temperature is low such as in winter. The air dehumidifying unit 10 is stopped so that the energy consumed in the refrigeration cycle can be reduced. In addition, when the dew point of the dry air output from the adsorption tower of the adsorption type air dehumidifying unit 30 is low, it is not necessary to urgently perform regeneration immediately after the adsorption tower is switched. are doing. For this reason, the regeneration air is intermittently supplied, and in particular, the high-quality dry air having a low dew point does not need to be consumed for regeneration by itself, so that the energy consumption associated therewith can be greatly reduced.

In the air dehumidifier of this embodiment, since the regenerated air flows intermittently, the air dehumidifier also has the effect of reducing the noise of the regenerated air discharged to the outside. Furthermore, since the refrigeration air dehumidification unit 10 and the adsorption type air dehumidification unit 30 are combined, the performance of the refrigeration air dehumidification unit 10 can be exerted during a high load period such as summer. For this reason, as in the conventional air dehumidifier in which the refrigeration air dehumidifier and the adsorption air dehumidifier are combined, the frequency of switching the adsorption tower is reduced, and the exhaust rate of the valve system such as a four-way valve or the adsorbent is reduced. Can be reduced. On the other hand, since a piping system for connecting the refrigeration air dehumidifying unit 10 and the adsorption air dehumidifying unit 30 can be omitted, the configuration of the air dehumidifying device 1 of the present embodiment can be simplified and provided at low cost.

In this embodiment, the design temperature of the inlet of the adsorption type air dehumidifying unit 30 is adopted as the reference temperature ta at which the refrigeration type air dehumidifying unit 10 is stopped. However, the reference temperature is not limited to this. . However, the reference temperature t
If a is equal to or higher than the inlet design temperature of the adsorption-type air dehumidifying unit 30, the compressed air containing moisture exceeding the design conditions is supplied to the adsorption-type air dehumidifying unit 30, so that the quality of the dry air deteriorates, Alternatively, a problem such as shortening of the life of the adsorbent may occur. On the other hand, when the reference temperature ta is lower than the inlet design temperature, the period during which the refrigeration air dehumidifying unit 10 operates increases, and the energy consumed increases. Therefore, it is desirable to adopt the inlet design temperature of the adsorption type air dehumidifier 30 as the reference temperature ta.

[0033]

As described above, in the present invention, the adsorption type air dehumidifying unit which can operate independently is provided as an air dehumidifying device in combination with the refrigeration type air dehumidifying unit. When the inlet air temperature is low, the refrigeration air dehumidifying unit is stopped to reduce energy consumption. Further, in the air dehumidifying apparatus and the control method of the present invention, the supply amount of the regeneration air can be controlled and the regeneration air can be supplied intermittently to suppress energy consumption throughout the year. Therefore, by using the air dehumidifier and the control method thereof according to the present invention, it is possible to reduce energy consumption throughout the year and to provide an air dehumidifier with low running cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an air dehumidifier according to the present invention.

FIG. 2 is a flowchart showing an outline of a control method of the present invention.

FIG. 3 is a diagram schematically showing a change in the amount of energy consumed by the air dehumidifier according to the present invention.

FIG. 4 is a block diagram showing a schematic configuration of a conventional air dehumidifier.

[Explanation of symbols]

 1,98..Air dehumidifier 10,80..Refrigeration air dehumidifier 11,82..Condenser 12.Blower fan 14,84.Compressor 18.Refrigeration cycle 20,81..Cooling dehumidifier ( 22..Temperature sensor 26,86..Capillary tube 30,90..Adsorption type air dehumidification unit 32..Humidity sensor 36..Regenerated air valve 38..Shuttle valve 40..Regeneration unit 41,42 ..Adsorption tower 46..Four-way valve 48..Muffler 50..Control circuit 70..Compressed air 72..Dry air 72a..Regeneration air

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Shoichi Muraoka, Inventor 246, Yutaka, Oaza, Suzaka-city, Nagano Orion Machinery Co., Ltd. F term (reference) 4D052 AA01 AA05 BA04 BB09 CD01 DA02 DB01 FA09 GA01 GA03 GA04 GB01 GB02 GB03 GB04 GB08

Claims (5)

[Claims] 1. A refrigeration air dehumidifying unit capable of cooling and dehumidifying compressed air, and an adsorbing air dehumidifying unit for dehumidifying compressed air supplied from the refrigeration air dehumidifying unit through an adsorption layer. The adsorption type air dehumidifier can operate alone, and the refrigeration air dehumidifier stops the refrigeration system of the refrigeration air dehumidifier when the inlet air temperature is low. apparatus. 2. The air dehumidifier according to claim 1, wherein the refrigeration air dehumidifier stops the refrigeration system when an inlet air temperature of the refrigeration air dehumidifier becomes lower than an inlet design temperature of the adsorption air dehumidifier. . 3. The air dehumidifying unit according to claim 1, wherein the adsorbing air dehumidifying unit includes a first adsorbing layer through which the compressed air supplied from the refrigerating air dehumidifying unit passes, and an outlet air of the first adsorbing layer. A second adsorbent layer for regenerating by flowing the part, and regenerating means for reducing the amount of air flowing to the second adsorbent layer when the humidity of the outlet air of the first adsorbent layer is low. Characteristic air dehumidifier. 4. A refrigerating air dehumidifying unit capable of cooling and dehumidifying compressed air, and an adsorbing air dehumidifying unit for passing compressed air supplied from the refrigerating air dehumidifying unit through an adsorption layer to dehumidify the air. A method for controlling an air dehumidifier in which the adsorption-type air dehumidifying unit can operate independently, wherein the refrigeration system of the refrigeration air dehumidifying unit is stopped when the inlet air temperature of the refrigeration air dehumidifying unit is low. A method for controlling an air dehumidifier, comprising a power step. 5. The second adsorbent according to claim 4, wherein a part of the outlet air of the first adsorbent layer through which the compressed air supplied from the refrigerating air dehumidifier passes is passed through the adsorbent air dehumidifier. An air dehumidifying device comprising an air saving step of reducing the amount of air flowing to the second adsorption layer when the humidity of the outlet air of the first adsorption layer is low when regenerating the layer. Control method.