JP5107379B2 - Control method and dehumidification system of dew point temperature in low dew point chamber - Google Patents

Description

  The present invention relates to a dew point temperature control method and a dehumidification system in a low dew point chamber in which a manufacturing environment in a secondary battery production line such as a lithium ion battery, an organic EL product production line, and a semiconductor production line is maintained at an ultra low dew point.

  Conventionally, in the above production line or the like, the dew point temperature of the production environment is controlled to a low dew point of, for example, −20 ° C. to −40 ° C., and in order to create this environment, for example, the dew point temperature is −50 ° C. to −70 ° C. Low dew point air is produced and supplied to the low dew point chamber.

  In recent years, various types of dehumidifiers for producing such low dew point air have been developed (Patent Documents 1 to 4 below).

Further, as a method for controlling the dew point temperature in the low dew point chamber, in Patent Document 3 below, the dew point temperature in the dry room is detected by a dew point meter installed in the dry room, and the detected value is transmitted to the control device. The control device controls the bypass damper, the proportional control damper, and the dew point control fan according to the detected dew point temperature, and supplies the processing air having a high dew point temperature before and after the dehumidifying part of the first stage rotor to the dehumidifying part of the second stage rotor. And a method of adjusting the dew point temperature of dry air supplied to the dry room by mixing with dry air dehumidified to a low dew point.
Japanese Patent No. 3842476 Patent No. 4224955 JP 2004-8914 A JP 2006-162131 A

  However, in the dew point temperature control method described in Patent Document 3, the dew point temperature is detected by a dew point meter installed in the low dew point room, and the low dew point air supplied to the room by the control device according to the detected dew point temperature. Since the dew point temperature is adjusted, it takes a certain time from the start of adjustment of the low dew point air produced by the dehumidifier until the indoor dew point temperature stabilizes. In the case where the entrance and exit are intense, there is a risk that the dew point temperature set as the indoor environment of the low dew point room (hereinafter referred to as the management dew point) may be significantly exceeded. On the other hand, when the dew point temperature adjustment start condition is lowered, the operation mode of the dehumidifier is frequently switched, which may cause various problems such as unstable control and increased running cost. Therefore, in the conventional dew point temperature control method, it is difficult to quickly respond to the fluctuation of the indoor dew point temperature.

  Here, in the management of the dew point temperature in the low dew point room, the main factor of the increase in the dew point temperature is the influence of people entering the low dew point room. Conventionally, in order to keep the low dew point chamber at the management dew point, it has been generally designed based on the indoor moisture load generated according to the occupants in the room.

  On the other hand, when there is no person in the room with a low dew point, there is almost no moisture load in the room, so the room dew point is below the control dew point, and the room dew point is supplied from the dehumidifier unless there is significant water intrusion from the outside Asymptotically approaches the dew point temperature of low dew point air. However, since it is not always the case that a person enters the room and the indoor moisture load increases, the supply of low dew point air cannot be stopped, and excess low dew point air is supplied. For this reason, the operation energy of the dehumidifier increases and the running cost increases.

  Accordingly, a main object of the present invention is to provide a method and a dehumidification system for controlling the dew point temperature of a low dew point chamber while maintaining the low dew point chamber at a predetermined dew point temperature and reducing the running cost of the dehumidifying device.

In order to solve the above-mentioned problems, the present invention according to claim 1 is directed to a low dew point chamber in which the indoor environment is maintained at a predetermined dew point temperature, and a front chamber for entrance and exit is provided adjacently. A dehumidifying device having a dehumidification rotor containing at least an adsorbent and supplying low dew point air to each of the low dew point chamber and the front chamber, and a human sensor for detecting a person in each of the low dew point chamber and the front chamber A controller for controlling the blowing amount and / or the dew point temperature of the low dew point air supplied from the dehumidifying device according to the detection signal of the human sensor,
The low dew point chamber and the front chamber each maintain internal airtightness, and the low dew point chamber and the front chamber can be moved by a person through the door, and the front chamber and the outdoor room can be moved by a person through the door. The low dew point chamber and the front chamber are each provided with a blow outlet for blowing low dew point air produced by the dehumidifier into each room, and the air in each room is returned to the dehumidifier. There is a suction port to care,
When a person enters the low dew point room, the controller uses the dehumidifier as low dew point air to be supplied to the front room and the low dew point room when a human sensor in the front room senses a person. After switching to the in-room operation mode with increased air flow and / or decreased dew point temperature, the human sensor in the low dew point room senses the person and the human sensor in the front room no longer senses the person The low dew point air supplied to the front chamber is controlled to switch to the non-occupied operation mode in which the blast volume is reduced and / or the dew point temperature is increased,
In a state where a person is present in the low dew point room and no person is present in the front room, the low dew point room continues the in-room operation mode, and the front room continues in the non-in-room operation mode,
When a person leaves the low dew point room, the controller increases the air flow rate as low dew point air to be supplied to the front room when the human sensor of the front room senses a person with respect to the dehumidifying device. And / or after switching to the in-room operation mode where the dew point temperature is lowered, and after the human sensor in the low dew point room no longer senses a person, the blast volume is reduced as the low dew point air supplied to the low dew point room. And / or after switching to the non-occupied operation mode in which the dew point temperature is raised, and after the human sensor in the front room stops detecting a person, the air flow rate is reduced as low dew point air supplied to the front room and / or There is provided a method for controlling a dew point temperature in a low dew point chamber, characterized in that control is performed to switch to a non-occupied operation mode in which the dew point temperature is increased.

In the first aspect of the invention, the room environment is maintained at a predetermined dew point temperature, and the low dew point air is supplied to each room with respect to the low dew point room provided adjacent to the front room for entering and leaving the room. respectively dehumidifier supplies a motion sensor for sensing the human of the indoor, Ri Do and a controller for controlling the dehumidifier according to the sensing signal of the human sensor, the low dew point chamber and the front chamber is Internal airtightness is maintained, and the low dew point chamber and the front chamber can be moved by a person through the door, and the front chamber and the outside can be moved by a person through the door. The chamber and the front chamber are each provided with an outlet for blowing low dew point air produced by the dehumidifier into each room, and an inlet for returning the air in each room to the dehumidifier. A dehumidifying system is provided.

  When the person enters the low dew point room from outside the room, the controller supplies the dehumidifier to the front room and the low dew point room when the human sensor in the front room senses the person. Switch to in-room operation mode with increased air flow and / or decreased dew point temperature as dew point air, then human sensor in low dew point room detects human and human sensor in front room detects human After running out, the low dew point air supplied to the front chamber is controlled to switch to the non-occupancy operation mode in which the blast volume is reduced and / or the dew point temperature is increased.

Further, when a person is present in the low dew point room and no person is present in the front room, the low dew point room continues the in-room operation mode, and the front room continues in the non-in-room operation mode. .

  On the other hand, when the person leaves the room from the low dew point room, the controller uses the dehumidifier as low dew point air to be supplied to the front room when the human sensor in the front room senses the person. Switch to the in-room operation mode with increased air flow and / or decreased dew point temperature, and then send it as low dew point air to be supplied to the low dew point room after the human sensor in the low dew point room stops detecting people. Switch to the non-occupied operation mode with reduced air volume and / or increased dew point temperature, and reduce air flow as low dew point air supplied to the front room after the presence sensor in the front room no longer detects people And / or control for switching to the non-occupancy operation mode in which the dew point temperature is increased.

  In other words, when there are no people in the low dew point room and the front room, the non-occupied operation mode is set. The low dew point chamber is switched to the occupancy operation mode in advance in anticipation that the dew point temperature rises due to the exchange of room air accompanying opening and closing of the door of the dew point chamber. For this reason, since low dew point air is supplied according to the moisture content of the room when no one is present, excessive low dew point air can be prevented, and the running cost of the dehumidifier can be reduced. It is possible to quickly cope with fluctuations in the room moisture load caused by entering the room, and the low dew point room can be maintained at a predetermined dew point temperature.

  In addition, a front chamber for entering and leaving the low dew point chamber is provided adjacent to the low dew point chamber, and low dew point air is also supplied to the front chamber from the dehumidifying device. The influence of the moisture load of the inflowing air accompanying the opening / closing of the air is extremely small, and the low dew point chamber can be maintained at a predetermined dew point temperature.

  As the present invention according to claim 2, when the controller reaches the dew point temperature set in advance after the human sensor of each chamber stops detecting the person with respect to the dehumidifying device, The control method of the dew point temperature of the low dew point room of Claim 1 which performs control which switches to the said non-occupancy operation mode is provided.

  The invention described in claim 2 stipulates that the residual operation in which the in-room operation mode is continued for a predetermined time after the human sensor in each room of the low dew point chamber or the front chamber stops detecting a person. is there. That is, by delaying the timing of switching from the room operation mode to the non-room operation mode when a person leaves the room from the time of leaving the room, the water load generated by the person in each room and the water load due to opening / closing of the door of the entrance / exit Can be removed. This residual operation is finished when each chamber reaches a preset dew point temperature.

As the present invention according to claim 3 , the low dew point chamber and the front chamber are both adjusted to be positive pressure from the outside, and the front chamber is adjusted to a negative pressure more than the low dew point chamber. The control method of the dew point temperature of the low dew point chamber in any one of Claims 1-2 is provided.

In the invention according to claim 3 , the low dew point chamber and the front chamber are both adjusted to have a positive pressure from the outside, and the front chamber is adjusted to a negative pressure more than the low dew point chamber. As a result, outdoor moisture can be prevented from penetrating into the room through building members such as wall surfaces and ceiling surfaces and slight gaps between them, and outside air can enter by opening and closing the door when entering and exiting the low dew point room. It is intended to prevent.

As the present invention according to claim 4 , a low dew point chamber in which the indoor environment is maintained at a predetermined dew point temperature, a front chamber provided adjacent to the low dew point chamber for entering and leaving the low dew point chamber, and at least A dehumidifying device having a dehumidification rotor containing an adsorbent and supplying low dew point air to each of the low dew point chamber and the front chamber, a human sensor for sensing a person in each of the low dew point chamber and the front chamber, The low dew point air supplied from the dehumidifying device and / or a controller for controlling the dew point temperature in response to a detection signal of the human sensor, the low dew point chamber and the front chamber are each internally airtight. The low dew point chamber and the front chamber are capable of moving a person through a door, and the front chamber and the outside of the room are capable of moving a person through the door. Each room has a low dew produced by the dehumidifier. With air outlet for blowing air into the chamber is provided, a dehumidification system inlet is provided for the return air to the air of the indoor to the dehumidifier,
When a person enters the low dew point chamber, the dehumidifying device sends air flow as low dew point air to be supplied to the front chamber and the low dew point chamber when the human sensor of the front chamber senses the person by the controller. And / or after switching to the in-room operation mode in which the dew point temperature is lowered, the human sensor in the low dew point room senses the person and the human sensor in the front room no longer senses the person. The low dew point air supplied to the front room is switched to the non-occupancy operation mode in which the blast volume is reduced and / or the dew point temperature is increased,
In a state where a person is present in the low dew point room and no person is present in the front room, the in-room operation mode is continued in the low dew point room, and the non-in-room operation mode is continued in the front room,
When the person leaves the low dew point room, the dehumidifier increases the air flow rate as low dew point air supplied to the front room when the human sensor of the front room senses a person by the controller. After switching to the occupancy operation mode in which the dew point temperature is lowered and the human sensor in the low dew point chamber no longer senses a person, the blast volume is reduced as low dew point air supplied to the low dew point chamber and After switching to the non-occupied operation mode in which the dew point temperature is raised and the human sensor in the front chamber no longer senses a person, the blast volume is reduced as low dew point air supplied to the front chamber and / or A dehumidification system is provided that is switched to a non-occupied operation mode in which the dew point temperature is increased.

According to a fifth aspect of the present invention, the dehumidifying device includes a rotary dehumidifying rotor containing an adsorbent material straddling an air supply path for supplying outside air and an exhaust path for exhausting air, and the dehumidifying rotor. However, at least a processing region interposed in the air supply path and having the function of adsorbing moisture, the regeneration region interposed in the exhaust path and having a function of desorbing moisture, and the regeneration region And a purge region having a function of cooling the dehumidification rotor by passing low-temperature air before moving to the processing region from
A heating device that heats the circulating air is disposed in the front stage of the dehumidifying rotor in the exhaust path, and a cooling device that cools the circulating air is disposed in the preceding stage of the dehumidifying rotor in the air supply path,
After a part of the air cooled by the cooling device is supplied to the front stage of the heating device in the exhaust passage through the purge region, it passes through the regeneration region and is exhausted to the outside, and all the rest is processed in the processing. A flow path to be supplied to the low dew point chamber and the front chamber through the region is formed, and a flow path to which return air and outside air from the low dew point chamber and the front chamber are supplied to the front stage of the cooling device is formed. And
Way outside air reaches the cooling device, the return air respectively in the middle of the air passing through the middle and the regeneration zone reaching the cooling device is discharged, according to claim 4, wherein the backflow prevention damper circulation air is installed A dehumidification system is provided.

The invention according to claim 5 defines the specific configuration of the dehumidifying device, and in particular, the air that has passed through the regeneration region and the return air to the cooling device and the return air to the cooling device are exhausted. In the middle of this, a backflow prevention damper for circulating air is installed. For this reason, it is possible to prevent a situation in which air having a high dew point temperature flows backward into the low dew point chamber or outside air flows backward from the exhaust port.

  As described above in detail, according to the present invention, it is possible to provide a method and a dehumidification system for controlling the dew point temperature of the low dew point chamber while maintaining the low dew point chamber at a predetermined dew point temperature and reducing the running cost of the dehumidifying device.

It is a system configuration figure of dehumidification system 1 concerning the present invention. It is a top view of the low dew point chamber 2 and the front chamber 3. FIG. It is a time series diagram which shows the operation mode of each room, and the sensing state of the human sensor 5. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Configuration of Dehumidification System 1]
As shown in FIG. 1, the dehumidifying system 1 according to the present invention includes a low dew point chamber 2 in which the indoor environment is maintained at a predetermined dew point temperature, and the low dew point chamber 2 for entering and leaving the low dew point chamber 2. A dehumidifying device 4 having a dehumidification rotor 20 containing at least an adsorbent and supplying low dew point air to each of the low dew point chamber 2 and the front chamber 3, and a low dew point chamber 2 A human sensor 5 for detecting a person in each room of the front chamber 3 and a control for controlling the blowing amount and / or the dew point temperature of the low dew point air supplied from the dehumidifying device 4 according to the detection signal of the human sensor 5. And the device 6.
Hereinafter, each configuration will be described in detail.

(About low dew point chamber 2 and front chamber 3)
As shown in FIGS. 1 and 2, the low dew point chamber 2 and the front chamber 3 are building members made of a material having a low moisture permeability so that no significant water intrusion occurs on the floor surface, wall surface and ceiling surface from the outside. By being comprised, internal airtightness is maintained with respect to the outdoor atmosphere. The door 10 for entering / exiting the low dew point chamber 2 and the door 11 for entering / exiting the front chamber 3 are also made of a material having a low moisture permeability so that no significant water intrusion occurs from the outside.

As shown in FIG. 2, entry and exit of people to low dew point chamber 2, Ru made through the front chamber 3. That is, the low dew point chamber 2 and the front chamber 3 can move through the door 10, and the front chamber 3 and the outside can move through the door 11.

  As shown in FIG. 1, the low dew point chamber 2 and the front chamber 3 are each provided with air outlets 12, 12... For blowing low dew point air produced by the dehumidifying device 4 into each room. .. Are provided for returning the air in each room to the dehumidifying device 4.

  The low dew point chamber 2 is adjusted to have a positive pressure from the outside. Accordingly, it is possible to prevent the penetration of the outside air through the building members such as the wall surface and the ceiling surface, and it is possible to prevent the entry of the outside air by opening and closing the door accompanying the entrance and exit. The front chamber 3 is also preferably adjusted to have a positive pressure from the outside, but is preferably set to a negative pressure rather than the low dew point chamber 2.

  In order to mitigate the rapid pressure increase in the low dew point chamber 2, an inter-room pressure adjusting damper 14 is provided on the wall surface that divides the low dew point chamber 2 and the front chamber 3, and the rapid pressure increase in the front chamber 3 is prevented. In order to alleviate, an inter-room pressure adjusting damper 15 is provided on a wall surface that partitions the front chamber 3 and the outdoor. Further, a differential pressure gauge 16 for measuring the inter-room differential pressure between the low dew point chamber 2 and the front chamber 3 is disposed across both chambers, and the inter-room differential pressure between the front chamber 3 and the outdoor is measured. A differential pressure gauge 17 is disposed between the two chambers. The detection results of the differential pressure gauges 16 and 17 are transmitted to the controller 6, and the controller 6 adjusts the amount of air blown from the dehumidifier 4 to the chambers 2 and 3 and / or the dew point temperature.

  A human sensor 5 is installed in each of the low dew point chamber 2 and the front chamber 3. The human sensor 5 is connected to a controller 6 to transmit a sensing signal. The human sensor 5 is attached to, for example, a ceiling surface or a wall surface of the low dew point chamber 2 and the front chamber 3, and senses that a person has approached the vicinity of the doors 10 and 11 and various places in the room. A sensor, an ultrasonic sensor, a photoelectric switch, an optical sensor, a camera, and the like are included.

  A dew point meter 18 for measuring the dew point temperature of the return air (room air) is installed in the middle of the return air flow path from the suction port 13 of the low dew point chamber 2 and the front chamber 3 to the dehumidifier 4. This dew point meter 18 is connected to the controller 6, and the detection result is transmitted. As the dew point meter 18, a mirror-cooled dew point meter that detects the degree of cloudiness of the reflecting mirror disposed in the flow path, a lithium chloride dew point meter that utilizes the moisture absorption characteristics of lithium chloride, and a base made of a conductor such as aluminum are many. Capacitance type that forms a laminate of non-conductors such as aluminum oxide and gold and other conductors with pores and detects the size of capacitance due to water molecules entering the pores of this laminate A dew point meter or the like can be used.

(About the dehumidifier 4)
The dehumidifying device 4 includes a cooling processing unit 4A that cools the outside air OA and the return air RA from the chambers 2 and 3, and a dehumidifying unit 4B that dehumidifies the cooled air.

  In the dehumidifying unit 4B of the dehumidifying device 4, a rotary dehumidifying rotor 20 containing an adsorbent (desiccant) is disposed across an air supply path S for supplying outside air and an exhaust path E for exhausting air. Yes.

  In addition, the cooling device 24 for cooling the circulating air is arranged in one stage or a plurality of stages in the front stage of the dehumidification rotor 20 in the air supply path S, and in the illustrated example, it is arranged in two stages (primary cooling apparatus and secondary cooling apparatus). A heating device 25 that heats the circulating air is disposed in front of the dehumidifying rotor 20 in the exhaust passage S. Further, a cooling device 26 and a heating device 27 for cooling and heating the circulating air are arranged at the subsequent stage of the dehumidifying rotor 20 in the air supply path S, respectively.

  The air supply path S is a flow path for treating the introduced outside air OA and the return air RA from the chambers 2 and 3 with the adsorbent and supplying the air to the chambers 2 and 3 as an air supply SA. The exhaust passage E is a passage that regenerates the adsorbent with the air heated by the heating device 25 and then exhausts the adsorbent as exhaust EA. Further, a return air path R is formed for introducing the return air RA sucked from the suction ports 13 of the low dew point chamber 2 and the front chamber 3 between the cooling devices 24, 24 arranged in two stages in the air supply path S. Yes.

  The dehumidification rotor 20 is provided with ventilation structures such as a mesh shape, a honeycomb shape, and a slit shape on both side surfaces of a casing formed in a rotating drum shape, and the casing has a conventional moisture absorption / desorption performance. More known adsorbents such as silica gel, zeolite, and alumina oxide are incorporated. Air in each of the flow paths S and E can pass through the inside of the dehumidifying rotor 20 through the ventilation structure of the casing, and the humidity is adjusted by the action of moisture adsorption / desorption of the adsorbent incorporated therein. . The dehumidification rotor 20 is rotatably supported by a rotation shaft provided along the flow path direction at the center of both side surfaces of the casing, and by rotating the rotation shaft at a predetermined rotation speed, The action of desorption is continuously switched.

  The dehumidifying rotor 20 includes a processing region 21 that is interposed in the air supply path S and has a function of adsorbing moisture, and a regeneration region 22 that is interposed in the exhaust path E and has a function of desorbing moisture. The purge region 23 has a function of cooling the dehumidification rotor 20 by passing low-temperature air before moving from the regeneration region 22 to the treatment region 21. In the purge area 23, if the adsorbent heated in the regeneration area 22 is introduced into the processing area 21 at a high temperature, the dehumidifying effect of the adsorbent may be reduced. It is provided for the purpose of cooling the material.

  As a flow path for supplying low temperature air to the purge region 23, the air cooled by the cooling devices 24, 24 of the air supply path S is supplied to the purge region 23, and the air that has passed through the purge region 23 is supplied to the purge region 23. A purge air supply path P to be sent to the front stage of the heating device 25 in the exhaust path E is formed.

  In the air supply path S, an air supply fan 28 is disposed upstream of the dehumidification rotor 20, and in the exhaust path E, an exhaust fan 29 is disposed downstream of the dehumidification rotor 20. The air supply fan 28 and the exhaust fan 29 are inverter-controlled by the controller 6.

  The cooling devices 24 and 26 are general air cooling coils cooled by a general air-conditioning heat source device. As the heat source device, a compression type or absorption type refrigerator, a turbo refrigerator, an absorption refrigerator or a screw refrigerator, or a cooling device using a cooling source such as a heat pump, a heat exchanger or a heat storage tank is used. Can do.

  As the heating devices 25 and 27, a general heater such as an electric heater, a hot water coil, a steam coil, a refrigerant coil, an air heating coil such as an electric heating coil, or the like can be used.

  The cooling devices 24 and 26 and the heating devices 25 and 27 are preferably connected to the controller 6 and output-controlled.

  On the other hand, each flow path S, E, P, R is provided with a damper for adjusting the flow rate of air. In the air supply path S, dampers D1, D2, and D3 are provided in the vicinity of the introduction path, upstream of the air supply fan 28, and downstream of the dehumidifying rotor 20, respectively. The exhaust path E is provided with a damper D4 in the vicinity of the exhaust path to the outside. In the purge air supply path P, a damper D5 is provided in the vicinity of the outlet of the purge region 23. In the return air path R, a damper D6 is provided in the vicinity of the junction with the air supply path S. Openings of these dampers D1 to D6 are controlled by the controller 6.

  Further, while the outside air OA in the air supply path S reaches the cooling device 24, the air that has passed through the regeneration region 22 of the exhaust path E is exhausted, and the air OA joins the air supply path S of the return air path R, respectively. Backflow prevention dampers BD1, BD2, and BD3 for preventing backflow of the circulating air are provided.

  In the air supply path S, a temperature / humidity measuring device 30 and a dew point meter 31 for measuring the temperature and humidity and the dew point temperature of the air that has passed through the processing region 21 of the dehumidifying rotor 20 are disposed, and a pressure gauge 32 is disposed. In addition, variable flow rate regulators 33 and 35 and air flow rate measuring devices 34 and 36 are arranged on the branch path to the front chamber 3 and the branch path to the low dew point chamber 2, respectively. Further, an air flow measuring device 37 for measuring the air flow of the air introduced into the heating device 25 is disposed in the exhaust path E, and a temperature for measuring the temperature and humidity of the air upstream of the regeneration region 22 is disposed. A humidity measuring device 38 is arranged.

  As the air flow measuring devices 34, 36, and 37, various known anemometers such as a hot-wire anemometer, a vane anemometer, a Pitot tube anemometer, and the like can be used.

  As the temperature / humidity measuring devices 30 and 38, those composed of the following thermometer and hygrometer can be used. As the thermometer, various known thermometers such as a thermocouple temperature sensor, an electrical resistance temperature sensor, or a mechanical temperature sensor such as a bimetal type can be used. The hygrometer is a known hygrometer, for example, an electric resistance type humidity sensor whose electric resistance changes according to humidity, and an electric capacity which changes according to moisture adsorbed on a dielectric made of a porous polymer material or ceramic material. Various types of hygrometers can be used such as an electric capacity type humidity sensor or a thermistor type humidity sensor that measures humidity from a change in electric resistance of the thermistor.

  The temperature / humidity measuring devices 30, 38, the dew point meters 18, 31, the pressure gauge 32, and the air flow measuring devices 34, 36, 37 are connected to the controller 6, and the measurement results are transmitted. Further, the variable flow rate adjusters 33 and 35 are connected to the controller 6 to adjust the flow rate.

[Operation status of dehumidification system 1]
Next, the operation state of the dehumidification system 1 will be described in detail with reference to FIG.

  In the present dehumidifying system 1, the presence / absence of a person in each room is determined by the human sensor 5 installed in the low dew point chamber 2 and the front chamber 3, and the dehumidifying device is controlled by the controller 6 based on the determination result. Switching from 4 to each operation mode in which the blowing amount and / or dew point temperature of the low dew point air supplied to each chamber is set to a predetermined value is performed. Specific operation mode switching timings are when a person enters the low dew point chamber 2 from an absence of a person and when the person leaves the low dew point room 2. Hereinafter, each state will be described in detail.

(Absence state)
Absence state is the state of sections (1) and (7) in Fig. 3 and Table 1. When no people are present in the low dew point room 2 and the front room 3, that is, in the low dew point room 2 and the front room 3 This is a case where the detected state of the human sensor is OFF (not detected). At this time, the controller 6 performs operation control on the dehumidifier 4 so that the low dew point chamber 2 and the front chamber 3 are in the non-occupied operation mode.

  This non-occupancy operation mode is an operation mode in which the blowing amount of the low dew point air supplied from the dehumidifier 4 to each room is smaller than the in-room operation mode described in detail later. The blast volume can be set to less than half of the operation mode. Further, when both the low dew point chamber 2 and the front chamber 3 are in the non-occupied operation mode, as shown in Table 1, the dew point temperature of the low dew point air supplied from the dehumidifier 4 is set high. be able to. The operation in which the dew point temperature is raised can be performed together with the reduction of the blowing amount, or can be performed instead of reducing the blowing amount.

  The above-described air flow rate can be adjusted by adjusting the inverter frequency of the air supply fan 28 of the dehumidifying device 4. The dew point temperature can be adjusted by adjusting the inverter frequency of the exhaust fan 29 or by setting the heating temperature of the heating device 25 to a low temperature. Therefore, the operating energy of the air supply fan 28 and the exhaust fan 29 can be reduced, and the energy required for air heating of the heating device 25 can be reduced. Further, by reducing the air volume of the exhaust fan 29 and reducing the air volume to the regeneration region 22, the outside air intake air volume (OA) is also reduced, so that the operating energy of the cooling device 24 required for the outside air cooling and dehumidification can also be reduced.

  A more specific operation control procedure will be described. First, the air flow rate of the low dew point air to the low dew point chamber 2 and the front chamber 3 is measured by the air volume measuring devices 34 and 36, respectively, and variable so as to become a predetermined air volume. The opening degree of the flow controllers 33 and 35 is adjusted. The static pressure in the duct is measured by the pressure gauge 32, and the low dew point chamber 2 and the front chamber 3 do not become negative pressure with respect to the outdoor atmosphere, and the supply air volume to the low dew point chamber 2 and the front chamber 3 is reduced. Without, the inverter frequency of the air supply fan 28 is lowered. At this time, the indoor pressures in the low dew point chamber 2 and the front chamber 3 are measured by the differential pressure gauges 16 and 17, and the measurement results are transmitted to the controller 6, and the controller 6 controls the variable flow rate regulators 33 and 35 and the air supply. The inverter frequency of the fan 28 is controlled to an appropriate value. Further, the inverter frequency of the exhaust fan 29 is reduced and the set temperature of the heating device 25 is lowered so that the low dew point air from the dehumidifier 4 becomes the set air volume and set dew point temperature in the non-occupied operation mode.

  In this absence state, the factor that raises the room dew points of the low dew point chamber 2 and the front chamber 3 is mainly moisture permeation from the outside through the building members constituting each room. When a person is present in the room, the amount of water generated is extremely small compared to the amount of water generated by the person, so that it is possible to operate at a level lower than the in-room operation mode in which the person's moisture load is removed. For this reason, the running cost of a dehumidifier can be reduced. Usually, the amount of air blown to the low dew point chamber 2 is determined so that the indoor dew point becomes equal to or lower than the control dew point by mixing and diluting the moisture load in the low dew point chamber with the low dew point air. “Ventilation frequency” obtained by dividing the low dew point air blast volume by the low dew point chamber volume is used (Table 1). In the non-occupancy operation mode, the indoor dew point in the low dew point room can be sufficiently maintained at the control dew point even if the number of ventilations is less than half compared to the in-room operation mode described later. Moreover, the dew point temperature of the low dew point air manufactured with the dehumidification apparatus 4 can also be made high as above-mentioned.

  For example, as shown in Table 1, in the in-room operation mode to be described later, the air volume condition and dew point temperature condition of the low dew point air supplied to the low dew point chamber 2 and the front chamber 3 are the ventilation frequency 30 times / h, dew point As a result of setting the temperature to −60 ° C., it is assumed that the low dew point chamber 2 and the front chamber 3 are maintained at an indoor dew point of −30 ° C. In this case, in the non-occupied operation mode, for example, the ventilation frequency can be set to 10 to 15 times / h, and the dew point temperature can be set to about −40 ° C. As a result, the running cost of the dehumidifying device 4 can be reduced as described above.

  In the non-occupied room operation mode, it is desirable that the air flow rate and dew point temperature of the low dew point air supplied to each of the rooms 2 and 3 are set in advance by the controller 6. Further, when the operation mode is switched, the pressure gauge 32, the air flow measuring devices 34 and 36, the differential pressure gauges 16 and 17 and the like are constantly measured to prevent a sudden increase in pressure in the room due to the switching of the operation mode. .

(When entering the room)
Next, the time of entering the room will be described in detail. The time of entering the room is the state of sections (2) and (3) in FIG. 3 and Table 1, and means that an outdoor person passes through the front room 3 and enters the low dew point room 2. At the time of entering the room, when a person opens the door 11 of the front room 3 and enters the front room 3, the controller 6 detects the person at the time when the human sensor 5 in the front room 3 senses a person. As the low dew point air to be supplied to the room 2, the blast amount is increased and / or the in-room operation mode in which the dew point temperature is lowered is switched. The in-room operation mode is an operation in which the blowing amount of low dew point air supplied to each room from the dehumidifying device 4 is increased from the non-in-room operation mode and / or the dew point temperature is decreased from the non-in-room operation mode. It is a mode, and specifically, it can be set to an air flow rate that is twice or more that of the non-occupied operation mode.

  Here, in this example, when the human sensor 5 in the front chamber 3 senses a person, that is, when a person enters the front chamber 3, control is performed to switch the low dew point chamber 2 to the in-room operation mode. Yes. For this reason, in anticipation that the dew point temperature in the low dew point chamber 2 rises due to the increase in the indoor moisture load accompanying the entry of a person into the low dew point chamber 2 and the exchange of the indoor air accompanying the opening and closing of the door of the low dew point chamber An operation for lowering the dew point temperature in the low dew point chamber is performed in advance. In addition, a front room 3 for entering and leaving the low dew point chamber 2 is provided, and low dew point air is also supplied to the front room 3 from the dehumidifier 4 so that a low dew point environment is provided. The fluctuation of the dew point temperature due to the air flowing into the low dew point chamber 2 due to the opening and closing of 10 can be suppressed, and the low dew point chamber 2 can be maintained at a predetermined dew point temperature. Note that the number of people entering the room can be counted, and the amount of low dew point air and / or the dew point temperature can be adjusted according to the number of people in the low dew point room 2.

  On the other hand, instead of the control for switching the low dew point chamber 2 to the in-room operation mode when the human sensor 5 in the front chamber 3 senses a person, as shown by the dotted line a in FIG. Alternatively, the low dew point chamber 2 may be controlled to switch to the in-room operation mode after a predetermined time has elapsed since the human sensor 5 sensed a person or when the human sensor 5 in the low dew point chamber 2 sensed a person.

  Thereafter, a person opens the door 10 of the low dew point chamber 2 and enters the low dew point chamber 2, the human sensor 5 in the low dew point chamber 2 detects the person, and the human sensor 5 in the front chamber 3 detects the person. After running out, the low dew point air supplied to the front chamber 3 is switched to the non-occupancy operation mode in which the blast volume is reduced and / or the dew point temperature is increased. Here, in the front chamber 3, after the human sensor 5 no longer senses a person, a residual operation in which the in-room operation mode is continued until the indoor environment of the front chamber 3 reaches a preset dew point temperature may be performed. preferable. The dew point temperature of the front chamber 3 can be measured by a dew point meter 18 provided in the return air path R extending from the suction port 13 of the front chamber 3 to the dehumidifying device 4, and controlled by the controller 6 based on the measurement result. Has been.

(Availability)
The occupancy state is the state of section (4) in FIG. 3 and Table 1, and is a state where a person performs work or the like in the low dew point chamber 2 and there is no person in the front chamber 3. At this time, in the low dew point chamber 2, the operation is continued in the in-room operation mode, and in the front chamber 3, the operation is continued in the non-in-room operation mode.

(When leaving the room)
The time of leaving the room is the state of sections (5) and (6) in FIG. 3 and Table 1 and means that the person in the low dew point room 2 passes through the front room 3 and goes out of the room. When a person opens the door 10 of the low dew point chamber 2 and moves to the front chamber 3 at the time of leaving the room, the low dew point air supplied to the front chamber 3 is detected when the human sensor 5 in the front chamber 3 senses a person. Switch to in-room operation mode with increased air flow and / or decreased dew point temperature. Thereafter, after the human sensor 5 in the low dew point chamber 2 no longer senses a person, the air flow is reduced and / or the dew point temperature is increased as low dew point air supplied to the low dew point chamber 2 through a predetermined residual operation. Switch to non-occupancy mode. In addition, after the human sensor 5 in the front chamber 3 no longer senses a person, the air flow is reduced and / or the dew point temperature is increased as a low dew point air supplied to the front chamber 3 through a predetermined residual operation. Switch to non-occupancy mode.

  DESCRIPTION OF SYMBOLS 1 ... Dehumidification system, 2 ... Low dew point chamber, 3 ... Front chamber, 4 ... Dehumidification apparatus, 5 ... Human sensor, 6 ... Controller, 10.11 ... Door, 16.17 ... Differential pressure gauge, 18.31 ... Dew point 20 ... Dehumidification rotor, 21 ... Processing area, 22 ... Regeneration area, 23 ... Purge area, 24/26 ... Cooling device, 25/27 ... Heating device, 28 ... Air supply fan, 29 ... Exhaust fan, 30/38 ... temperature / humidity measuring device, 32 ... pressure gauge, 33, 35 ... variable flow rate regulator, 34, 36, 37 ... air flow measuring device, D1-D6 ... damper, BD1-BD3 ... backflow prevention damper

Claims (5)

The indoor environment is maintained at a predetermined dew point temperature, and the low dew point chamber includes a dehumidification rotor that contains at least an adsorbent with respect to the low dew point chamber provided adjacent to the front chamber for entering and leaving the room. A dehumidifying device that supplies low dew point air to each of the front chambers, a human sensor that detects a person in each of the low dew point chamber and the front chamber, and supplied from the dehumidifying device according to a detection signal of the human sensor A controller for controlling the amount of blown air and / or the dew point temperature of the low dew point air,
The low dew point chamber and the front chamber each maintain internal airtightness, and the low dew point chamber and the front chamber can be moved by a person through the door, and the front chamber and the outdoor room can be moved by a person through the door. The low dew point chamber and the front chamber are each provided with a blow outlet for blowing low dew point air produced by the dehumidifier into each room, and the air in each room is returned to the dehumidifier. There is a suction port to care,
When a person enters the low dew point room, the controller uses the dehumidifier as low dew point air to be supplied to the front room and the low dew point room when a human sensor in the front room senses a person. After switching to the in-room operation mode with increased air flow and / or decreased dew point temperature, the human sensor in the low dew point room senses the person and the human sensor in the front room no longer senses the person The low dew point air supplied to the front chamber is controlled to switch to the non-occupied operation mode in which the blast volume is reduced and / or the dew point temperature is increased,
In a state where a person is present in the low dew point room and no person is present in the front room, the low dew point room continues the in-room operation mode, and the front room continues in the non-in-room operation mode,
When a person leaves the low dew point room, the controller increases the air flow rate as low dew point air to be supplied to the front room when the human sensor of the front room senses a person with respect to the dehumidifying device. And / or after switching to the in-room operation mode where the dew point temperature is lowered, and after the human sensor in the low dew point room no longer senses a person, the blast volume is reduced as the low dew point air supplied to the low dew point room. And / or after switching to the non-occupied operation mode in which the dew point temperature is raised, and after the human sensor in the front room stops detecting a person, the air flow rate is reduced as low dew point air supplied to the front room and / or A control method of a dew point temperature in a low dew point room, wherein control is performed to switch to a non-occupancy operation mode in which the dew point temperature is increased.   The controller controls the dehumidifier to switch to the non-occupied operation mode when each room reaches a preset dew point temperature after the human sensor in each room stops detecting a person. The method for controlling the dew point temperature of the low dew point chamber according to claim 1. The low dew point chamber and the front chamber, together with being adjusted such that the positive pressure from the outside, the front chamber according to claim 1-2 or which is adjusted to a negative pressure than the low dew point chamber To control the dew point temperature of the low dew point chamber. It has a low dew point chamber in which the indoor environment is maintained at a predetermined dew point temperature, a front chamber provided adjacent to the low dew point chamber for entering and exiting the low dew point chamber, and a dehumidification rotor containing at least an adsorbent. A dehumidifying device that supplies low dew point air to each of the low dew point chamber and the front chamber, a human sensor for detecting a person in each of the low dew point chamber and the front chamber, and a detection signal of the human sensor And a controller that controls the blowing amount and / or the dew point temperature of the low dew point air supplied from the dehumidifying device, and the low dew point chamber and the front chamber can be moved by a person through a door, A person can move between the front room and the outside through a door, and the low dew point room and the front room are each provided with a blow outlet for blowing low dew point air produced by the dehumidifying device into each room. The dehumidifier removes the air in each room A dehumidification system inlet is provided for return air,
When a person enters the low dew point chamber, the dehumidifying device sends air flow as low dew point air to be supplied to the front chamber and the low dew point chamber when the human sensor of the front chamber senses the person by the controller. And / or after switching to the in-room operation mode in which the dew point temperature is lowered, the human sensor in the low dew point room senses the person and the human sensor in the front room no longer senses the person. The low dew point air supplied to the front room is switched to the non-occupancy operation mode in which the blast volume is reduced and / or the dew point temperature is increased,
In a state where a person is present in the low dew point room and no person is present in the front room, the in-room operation mode is continued in the low dew point room, and the non-in-room operation mode is continued in the front room,
When the person leaves the low dew point room, the dehumidifier increases the air flow rate as low dew point air supplied to the front room when the human sensor of the front room senses a person by the controller. After switching to the occupancy operation mode in which the dew point temperature is lowered and the human sensor in the low dew point chamber no longer senses a person, the blast volume is reduced as low dew point air supplied to the low dew point chamber and After switching to the non-occupied operation mode in which the dew point temperature is raised and the human sensor in the front chamber no longer senses a person, the blast volume is reduced as low dew point air supplied to the front chamber and / or A dehumidification system that is switched to a non-occupied operation mode in which the dew point temperature is increased. The dehumidifying device includes a rotary dehumidifying rotor with an adsorbent built in between an air supply path for supplying outside air and an exhaust path for exhausting air, and the dehumidification rotor is at least in the air supply path. A treatment region having the function of interposing the adsorbent to adsorb moisture, a regeneration region having the function of intercalating the adsorbent to adsorb moisture in the exhaust passage, and a low temperature before moving from the regeneration region to the treatment region And a purge region having a function of cooling the dehumidifying rotor by passing air of
A heating device that heats the circulating air is disposed in the front stage of the dehumidifying rotor in the exhaust path, and a cooling device that cools the circulating air is disposed in the preceding stage of the dehumidifying rotor in the air supply path,
After a part of the air cooled by the cooling device is supplied to the front stage of the heating device in the exhaust passage through the purge region, it passes through the regeneration region and is exhausted to the outside, and all the rest is processed in the processing. A flow path to be supplied to the low dew point chamber and the front chamber through the region is formed, and a flow path to which return air and outside air from the low dew point chamber and the front chamber are supplied to the front stage of the cooling device is formed. And
Way outside air reaches the cooling device, the return air respectively in the middle of the air passing through the middle and the regeneration zone reaching the cooling device is discharged, according to claim 4, wherein the backflow prevention damper circulation air is installed Dehumidification system.

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