JP2011027283A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system capable of preventing excessive dehumidification and re-humidification, capable of reducing heating energy of the re-humidification and regeneration air, and capable of performing precise temperature/humidity control. <P>SOLUTION: The air conditioning system comprises a dry-type dehumidifier 14 having a dehumidifying part 14a and a regeneration part 14b, an air conditioner 15 installed between the dehumidifier 14 and a dry room 16, a return-air duct 18 for returning a part of return air from the dry room 16 to the air conditioner 15, and a diverging duct 20 for returning the air to the dehumidifying part 14a. A first damper 1 is installed to the air circulation duct 18, and a second damper 2 is installed to the diverging line 20. Opening degrees of the both dampers are controlled based on detection values of a hygrometer 3 installed in the dry room 16. A bypass duct 4 is installed between an air supply duct 32 for supplying the regeneration air to the regeneration part 14b and an exhaust duct 35 for exhausting the air exhausted from the regeneration part 14b to the outside. A third damper 5 is installed to the air supply duct 32, and a fourth damper 6 is installed to the bypass duct 4. Opening degrees of these dampers are controlled based on detection values of a dew-point thermometer 7 installed to a regeneration air duct 36. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air conditioning system, and in particular, using a dry dehumidifier equipped with a rotary honeycomb rotor capable of achieving a low dew point temperature, an improvement was made to suppress energy consumption according to a dehumidification load. It relates to air conditioning systems.

  Conventionally, a cooling dehumidification method is well known as a method for dehumidifying humid air. However, in this cooling dehumidification method, freezing at a cooling dehumidified portion becomes a problem when a low dew point temperature of 0 ° C. or less is required. Therefore, it cannot cope with an air conditioning system in a dry room that requires a low dew point temperature of 0 ° C. or less.

  Therefore, as a dehumidifier for supplying air having a low dew point temperature, for example, a dry dehumidifier using a rotary rotor as shown in Patent Document 1 is used. This dry dehumidifier is equipped with a honeycomb-shaped rotor impregnated with an absorbing liquid such as lithium chloride or calcium chloride, and a rotor composed of an adsorbent such as silica gel or zeolite, and the dehumidifying section is processed while rotating the rotor. The air is dehumidified by passing air, and the rotor is regenerated by passing heated air through the regeneration unit. That is, in the dehumidifying section, moisture contained in the air introduced into the dehumidifying section is removed by absorbing or adsorbing in the absorption liquid or adsorbent, and the regeneration section releases the moisture with heated air. And dehumidifying treatment can be performed continuously.

  FIG. 5 shows an example of a conventional air conditioning system incorporating the dry dehumidifier as described above. That is, in this air conditioning system, the introduced outside air is introduced into this system from the outside air introduction duct 11, sent to the precooler 13 by the outside air intake fan 12, and cooled or dehumidified to a predetermined temperature by the precooler 13. The dry dehumidifier 14 is configured to be introduced into the dehumidifying part 14a. A temperature sensor 13a is installed on the downstream side of the precooler 13 so that the cooling temperature by the precooler 13 can be controlled.

  Further, the processing air that has exited from the dehumidifying section 14 a is sent to the air conditioner 15 together with a part of the circulating air that has returned from the dry room 16 through the circulating duct 18 by the dehumidifying fan 17. Has been. Thereby, the air dehumidified by passing through the dehumidifying part 14 a is adjusted to a predetermined temperature and humidity by the air conditioner 15 and supplied to the dry room 16 via the supply duct 19.

  In addition, a part of the recirculated air that has returned through the recirculated duct 18 is configured to be introduced into the dehumidifying portion 14 a of the dry dehumidifying device 14 by the branch duct 20. Thus, in order to adjust the flow rate of the ambient air introduced into the air conditioner 15 and the flow rate of the ambient air introduced into the dehumidifying unit 14a, the air volume adjustment dampers 21, 22 are provided in the ambient air duct 18 and the branch duct 20, respectively. Is installed.

  The ratio of the return air amount to the air conditioner 15 and the dry dehumidifying device 14 can achieve the design temperature and humidity of the target room according to the humidity load generated in the air conditioned room, the capacity of the dry dehumidifying device 14, and the like. Moreover, it is set in advance at the time of designing the air conditioning system, and the opening degree of the air volume adjusting dampers 21 and 22 is adjusted so as to have this air volume ratio. In addition, the rotor of the dry dehumidifier 14 is configured to be rotationally driven by a rotational driving means (not shown).

  On the other hand, the regeneration source air introduced into the air supply duct 32 by the regeneration air fan 31 passes through the heater 34 via the sensible heat exchanger 33 in the regeneration unit 14b of the dry-type dehumidifier 14 so that a predetermined amount is obtained. After being heated to a temperature, it is introduced into the regenerator 14b so that the rotor can be regenerated. The regenerative air that has exited from the regenerator 14b is configured to be discharged from the exhaust duct 35 to the outside via the sensible heat exchanger 33 as exhaust. A temperature sensor 34a is installed on the downstream side of the heater 34 so that the heating temperature by the heater 34 can be controlled. Note that outside air is generally used as the regeneration air.

JP-A-6-63344

  In the conventional air conditioning system as described above, the dehumidifying capacity of the dry-type dehumidifying device 14 is normally set for the maximum dehumidifying load. That is, in a state where the generated moisture load in the room is the maximum and the moisture load contained in the introduced outside air is the maximum (summer season), dehumidification is performed with the regeneration air having the maximum moisture content in the outside air serving as the regeneration source air (summer season). Is set to be able to.

  However, when there is almost no generated moisture load in the room and the moisture load contained in the introduced outside air is minimal (winter), the amount of moisture contained in the outside air as the regeneration source air is dehumidified with the least (winter) regeneration air. Since the humidity of the processing air is lowered more than necessary, it is necessary to rehumidify by the air conditioner 15, and humidification energy for that purpose is required. Moreover, since the dehumidification is more than necessary, the energy for heating the regenerated air has been wasted.

  In order to solve such a problem, conventionally, as a method of changing the dehumidification amount corresponding to the moisture load of the outside air or the generated moisture load of the dry room 16, a dry dehumidifier as in Patent Document 1 is used. A method of controlling the number of rotations of the 14 rotors and a method of controlling the temperature and flow rate of the regeneration air have been used. However, precise temperature / humidity control has not yet been achieved due to the slow response speed due to the low rotor speed and the large heat capacity of the rotor components and the adsorbent.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and its purpose is to prevent excessive dehumidification and rehumidification, and humidification energy for rehumidification and regeneration. An object of the present invention is to provide an air conditioning system capable of reducing the heating energy of air and capable of precise temperature and humidity control.

  In order to achieve the above object, in the air conditioning system of the present invention, the processing air volume in the dehumidifying part of the dry dehumidifying device is made variable according to the generated moisture load in the room, and the temperature and humidity of the regenerated air are made constant throughout the year. Thus, it is possible to obtain an air conditioning system that prevents over-dehumidification and re-humidification, thereby reducing the humidification energy for re-humidification and the heating energy of the regeneration air, and enables precise temperature and humidity control.

  That is, the invention described in claim 1 is a dry dehumidifying device that dehumidifies the air by passing the processing air through the dehumidifying unit while rotating the rotor, and regenerates the rotor by passing the heated air through the regenerating unit. An air-conditioning unit installed between the dry dehumidifier and the air-conditioning target chamber, an air supply duct for supplying regenerated air to the regeneration unit of the dry dehumidifier, and air discharged from the regeneration unit An air-conditioning system provided with an exhaust duct that exhausts the air to the outside, an air-circulation duct that returns the air from the air-conditioning target chamber to the air-conditioner, and a branch duct that returns to the dehumidifying part of the dry-type dehumidifier The first damper is installed in the air duct, and the second damper is installed in the branch line, and the opening degree of these dampers is determined by the hygrometer installed in the air-conditioning target chamber. When the detected value of the hygrometer is lower than a predetermined value set in advance, the opening degree of the first damper is increased and the second damper is configured to be controlled based on the output value. The damper is configured to be controlled so as to reduce the opening of the damper.

  According to invention of Claim 1 which has the above structures, based on the detected value of the hygrometer installed in the air-conditioning process target room, the 1st damper installed in the recirculation duct, and the branch line By controlling the opening degree of the second damper installed in the chamber, when the amount of water generated in the air-conditioning target room is small, the amount of air returned to the dehumidifying part of the dry dehumidifier is reduced, and the dehumidifying part In addition to preventing excessive dehumidification, re-humidification by an air conditioner can be eliminated.

  Moreover, since the amount of processing air in the dehumidifying part of the dry dehumidifying device is reduced, the amount of water dehumidified in the dehumidifying part is also reduced. As a result, since the amount of moisture contained in the exhaust gas is reduced in the regeneration unit, the amount of regeneration source air newly introduced into the air supply duct can be reduced, so that the energy for heating the regeneration air is also reduced. Can do.

  The invention according to claim 2 is the air conditioning system according to claim 1, wherein a bypass duct is provided between the air supply duct and the exhaust duct, and a third damper is installed in the air supply duct. In addition, a fourth damper is installed in the bypass duct, and the opening degree of these dampers is configured to be controlled based on a detection value of a dew point thermometer installed on the upstream side of the regeneration unit, When the detected value of the dew point thermometer is lower than a predetermined value set in advance, control is performed to reduce the opening of the third damper and increase the opening of the fourth damper. Thus, the regeneration air is circulated through the bypass duct.

  According to the invention described in claim 2 having the above-described configuration, based on the detected value of the dew point thermometer installed upstream of the regeneration unit, the third damper installed in the air supply duct; By controlling the opening degree of the fourth damper installed in the bypass duct, the regeneration air can be circulated through the bypass duct, so that the heating energy of the regeneration air can be reduced.

  According to a third aspect of the present invention, in the air conditioning system according to the first or second aspect, a differential pressure sensor for measuring a differential pressure between the dehumidifying unit and the rotor partition of the regeneration unit is installed, and the dehumidifying unit A fifth damper is installed on the downstream side, and a sixth damper is installed on the downstream side of the regeneration unit, and the opening degree of these dampers is controlled based on the detected value of the differential pressure sensor. It is comprised so that it may be comprised.

  According to the invention described in claim 3 having the above-described configuration, the differential pressure between the rotor partition of the dehumidifying unit and the regenerating unit changes and the amount of leakage also changes due to the variation in the processing air amount and the bypass operation of the regenerating air. However, since such a change in the leak amount makes controllability worse, based on the detection value of the differential pressure sensor, the differential pressure between the rotor partition of the dehumidifying unit and the regeneration unit is almost constant, or the leak amount Can be controlled so that the differential pressure becomes ≈0. Thereby, the air-conditioning system which can maintain the further outstanding controllability can be provided.

According to a fourth aspect of the present invention, in the air conditioning system according to any one of the first to third aspects, a purge sector is installed between the dehumidifying unit and the regenerating unit of the dry dehumidifying device. It is a feature.
The air conditioning system of the present invention can also be applied to the case where a dry dehumidifying device in which a purge sector is installed between the dehumidifying unit and the regenerating unit is used.

  According to the present invention, an air conditioning system that can prevent excessive dehumidification and rehumidification, can reduce humidification energy for rehumidification and heating energy of regenerated air, and can perform precise temperature and humidity control. Can be provided.

It is a figure which shows the structure of Example 1 of the air conditioning system which concerns on this invention. It is a figure which shows the structure of Example 2 of the air conditioning system which concerns on this invention. It is a figure which shows the structure of the other Example of the air conditioning system which concerns on this invention. It is a figure which shows the structure of the other Example of the air conditioning system which concerns on this invention. It is a figure which shows the structure of the conventional air conditioning system.

  Hereinafter, a specific embodiment of an air conditioning system according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the member same as the conventional type shown in FIG. 5, and description is abbreviate | omitted.

(1-1) Configuration of Embodiment 1 In this embodiment, as shown in FIG. 1, a first air duct 18 is connected to an air duct 18 that sends the air returned from the dry room 16 to the air conditioner 15. The damper 1 is installed, the second damper 2 is installed on the branch line 20 connected to the dehumidifying part 14 a of the dry dehumidifier 14, and the opening degree of these dampers 1 and 2 is installed in the dry room 16. On the basis of the detected value of the hygrometer 3, the control device (not shown) is configured to control.

  In this air conditioning system, when the operation is started, the actual indoor humidity is often higher than the indoor set humidity. Therefore, the first damper 1 is controlled in the fully closed direction and the second damper 2 is controlled in the fully opened direction. The Rukoto. In this case, since the air flow to the dry dehumidifier 14 becomes too large and normal operation may be hindered, the minimum opening of the first damper 1 and the maximum opening of the second damper 2 are set in advance. The opening is set at the set maximum dehumidifying load.

  In the present embodiment, a bypass duct 4 is provided between an air supply duct 32 that supplies regeneration source air to the regeneration unit 14 b of the dry dehumidifier 14 and an exhaust duct 35. A third damper 5 is installed, and a fourth damper 6 is installed in the bypass duct 4, and the degree of opening of these dampers 5, 6 is that of the dew point thermometer 7 installed in the regeneration air duct 36. It is configured to be controlled by a control device (not shown) based on the detected value. Other configurations are the same as those of the conventional example shown in FIG.

(1-2) Operation of Embodiment 1 The air conditioning system having the above configuration operates as follows. That is, the introduced outside air introduced into the present system from the outside air introduction duct 11 is sent to the precooler 13 by the outside air intake fan 12 and cooled or dehumidified to a predetermined temperature by the precooler 13, and then the dehumidifying fan. 17 is introduced into the dehumidifying part 14 a of the dry dehumidifying device 14 together with a part of the atmospheric air returned from the dry room 16 through the branch duct 20. Then, the air discharged from the dehumidifying unit 14a is sent to the air conditioner 15 together with a part of the recirculated air that has returned from the dry room 16 through the recirculated air duct 18, and the air conditioner 15 brings the air to a predetermined temperature and humidity. It is adjusted and supplied to the dry room 16 through the supply duct 19.

  When the generated moisture load in the dry room 16 is smaller than the preset maximum load, the first load installed in the air duct 18 is based on the detection value of the hygrometer 3 installed in the dry room 16. The opening degree of the first damper 1 is controlled in the “open” direction, and the opening degree of the second damper 2 installed in the branch line 20 is controlled in the “closed” direction, and the dehumidifying part 14 a of the dry dehumidifying device 14 is controlled. Control is performed to reduce the flow rate of the return air. As a result, excessive dehumidification by the dry dehumidifier 14 can be prevented, and rehumidification by the air conditioner 15 becomes unnecessary.

  In this case, the amount of treated air in the dehumidifying part 14a of the dry-type dehumidifying device 14 is reduced, so that the amount of dehumidified water generated in the dehumidifying part 14a is also reduced. As a result, in the regeneration unit 14b, the amount of moisture contained in the exhaust gas is also reduced, so that the amount of regeneration source air newly introduced into the air supply duct 32 can be reduced, so that the heating energy by the heater 34 is also reduced. Can do.

  That is, when the detected value of the dew point thermometer 7 installed in the regenerative air duct 36 becomes lower than a preset value, the third damper 5 installed in the air supply duct 32 is closed and the bypass duct. The amount of regeneration source air newly introduced into the air supply duct 32 can be reduced by opening the fourth damper 6 installed at 4 and circulatingly utilizing the regeneration air via the bypass duct 4. As a result, compared with the case where new regeneration source air is introduced, the heating energy by the heater 34 can be reduced.

  On the other hand, when the generated moisture load in the dry room 16 increases, the detection value of the hygrometer 3 installed in the dry room 16 also increases, so the first damper 1 installed in the air duct 18 Of the second damper 2 installed in the branch line 20 is controlled in the “open” direction and returned to the dehumidifying part 14a of the dry dehumidifying device 14. The flow rate of the ambient air is increased to control the maximum dehumidifying load.

  In this case as well, depending on the detection value of the dew point thermometer 7 installed in the regeneration air duct 36, the third damper 5 installed in the air supply duct 32 is closed and the fourth damper installed in the bypass duct 4 is used. It is also possible to circulate the regeneration air by opening the damper 6. Thereby, the heating energy by the heater 34 can be reduced significantly.

(1-3) Effect of Example 1 As described above, according to the present air conditioning system, the amount of processing air in the dehumidifying part of the dry dehumidifying device 14 can be made variable according to the generated moisture load in the dry room. . Thereby, while being able to prevent the excessive dehumidification by the dry-type dehumidification apparatus 14, the rehumidification by the air conditioner 15 can also be reduced, Therefore The humidification energy for rehumidification can be reduced.

  Further, based on the detection value of the dew point thermometer 7 installed in the regenerative air duct 36, the third damper 5 installed in the air supply duct 32 is closed and the fourth damper 6 installed in the bypass duct 4. Is opened and the regenerated air is circulated, and the temperature and humidity of the regenerated air can be made constant by adjusting the amount of heating by the heater 34 based on the detection value of the temperature sensor 34a. In addition to being able to reduce the amount of dehumidification, that is, the dehumidifying ability of the apparatus is stabilized, and precise temperature and humidity control becomes possible.

(2-1) Configuration of Embodiment 2 This embodiment is a modification of Embodiment 1 described above. As shown in FIG. 2, the dehumidifying unit 14a and the regenerating unit 14b are provided outside the dry dehumidifying device 14. A differential pressure sensor 8 for measuring the differential pressure of the rotor partition portion is installed. Further, a fifth damper 9 is installed on the downstream side of the dehumidifying part 14a of the dry dehumidifying device 14, and a sixth damper 10 is installed on the downstream side of the regenerating part 14b. The opening degree of 10 is configured to be controlled by a control device (not shown) based on the detected value of the differential pressure sensor 8. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

(2-2) Operation of Embodiment 2 In the air conditioning system having the above-described configuration, not only operations and effects similar to those of Embodiment 1 can be obtained, but also the following specific operations and effects can be obtained. can get. That is, in the dry type dehumidifier 14, the differential pressure between the rotor partitions of the dehumidifying unit 14a and the regenerating unit 14b changes due to fluctuations in the amount of processing air and bypass operation of the regenerating air, and the amount of leakage also changes. Since such a change in the leak amount deteriorates controllability, in the present embodiment, the difference is made so that the differential pressure between the rotor partitions of the dehumidifying unit 14a and the regenerating unit 14b becomes almost constant or to reduce the leak amount. Based on the detected value of the differential pressure sensor 8, the fifth damper 9 installed on the downstream side of the dehumidifying unit 14a and the sixth installed on the downstream side of the regenerating unit 14b so that the pressure becomes ≈0. The opening degree of the damper 10 is controlled.

(2-3) Effects of Example 2 As described above, according to the present air conditioning system, in addition to the same operations and effects as Example 1, the differential pressure between the rotor partitions of the dehumidifying unit 14a and the regenerating unit 14b is constant. Alternatively, it is possible to provide an air conditioning system capable of maintaining a further excellent controllability by controlling so that ≈0.

(2-4) Other Embodiments The present invention is not limited to the above-described embodiments, and specific shapes of members, mounting positions, and methods can be appropriately changed. For example, the hygrometer 3 may be installed not at the inside of the dry room 16 but at the outlet portion of the air conditioner 15, or by installing a blower instead of the fifth damper 9 and the sixth damper 10 and rotating the hygrometer 3. You may comprise so that a number may be controlled. Also, these dampers or blowers can be used only on the processing air side, on both the entering and exiting side of the processing air side, or only on the regeneration air side, on both the entering and exiting side of the regeneration air side, and further on the processing air side. And may be installed on both the regeneration air side.

  In addition, as a low dew point target and an energy saving method, a purge sector is conventionally installed between the regeneration unit and the dehumidification unit of the dry dehumidifier, but the air conditioning system according to the present invention can also be applied to this case. it can. That is, as shown in FIGS. 3 and 4, in the air conditioning system including the dry dehumidifier 14 in which the purge sector 14c is installed between the dehumidifying unit 14a and the regenerating unit 14b, it is newly connected to the purge sector 14c. A second branch line 40 may be provided, and an air volume adjusting damper 41 may be installed in the second branch line 40.

  In other words, in the modified example shown in FIG. 3, by supplying stable ambient air having a lower humidity than the regeneration air to the purge sector 14c, it is possible to supply more stable low dew point temperature air. Moreover, since it passes the rotor part which is high temperature in the reproduction | regeneration part 14b, it becomes the assistance of the heater 34. FIG. Further, in this modified example, on the processing air side sent to the air conditioner via the dehumidifying unit 14a, the purge sector rotor is cooled by the air (purge air) passing through the purge sector 14c, so that the purge sector 14c Compared with the case where it is not installed, the temperature does not become high, and the cooling energy on the air conditioner side can be reduced.

  Further, in the modification shown in FIG. 4, by providing a line for bypassing the heater 34 and introducing the regenerative air into the purge sector 14c, the introduction amount of the recirculation air is reduced, and the temperature of the purge sector portion is reduced. It is possible to lower. Decreasing the introduction amount of the ambient air leads to a reduction in the introduction outside air amount, so that the device capacity of the dehumidifier can be reduced and energy can be saved.

DESCRIPTION OF SYMBOLS 1 ... 1st damper 2 ... 2nd damper 3 ... Hygrometer 4 ... Bypass duct 5 ... 3rd damper 6 ... 4th damper 7 ... Dew point thermometer 8 ... Differential pressure gauge 9 ... 5th damper 10 ... 1st 6 damper 11 ... outside air introduction duct 12 ... fan for taking in outside air 13 ... precooler 13a ... temperature sensor 14 ... dry dehumidifier 14a ... dehumidifying part 14b ... regenerating part 14c ... purge sector 15 ... air conditioner 16 ... dry room 17 ... dehumidifying Processing fan 18 ... Aeration duct 19 ... Supply duct 20 ... Branch duct 21,22 ... Air volume adjusting damper 31 ... Regenerative air fan 32 ... Air supply duct 33 ... Sensible heat exchanger 34 ... Heater 34a ... Temperature sensor 35 ... Exhaust Duct 36 ... Regenerative air duct 40 ... Second branch line 41 ... Air volume adjustment damper

Claims (4)

A dry dehumidifier that regenerates the rotor by passing the processing air through the dehumidifying part while rotating the rotor, and also regenerates the rotor by passing the heated air through the regenerating part, and the dry dehumidifier and the air-conditioning target chamber And an air conditioner installed between
An air supply duct for supplying regenerated air to the regeneration unit of the dry dehumidifier, and an exhaust duct for exhausting the air discharged from the regeneration unit to the outside,
In the air conditioning system provided with an air duct returning the air from the air conditioning target room to the air conditioner, and a branch duct returning to the dehumidifying part of the dry dehumidifier,
A first damper is installed in the air duct and a second damper is installed in the branch line;
The opening degree of these dampers is configured to be controlled based on the detected value of a hygrometer installed in the air-conditioning target room,
When the detected value of the hygrometer is lower than a predetermined value set in advance, the opening degree of the first damper is increased and the opening degree of the second damper is controlled to be reduced. An air-conditioning system characterized by being configured. A bypass duct is provided between the air supply duct and the exhaust duct;
A third damper is installed in the air supply duct, and a fourth damper is installed in the bypass duct.
The opening degree of these dampers is configured to be controlled based on a detection value of a dew point thermometer installed on the upstream side of the regeneration unit,
When the detected value of the dew point thermometer is lower than a predetermined value set in advance, control is performed to reduce the opening of the third damper and increase the opening of the fourth damper. The air conditioning system according to claim 1, wherein the regeneration air is circulated through a bypass duct. A differential pressure sensor for measuring the differential pressure between the dehumidifying part and the rotor partition part of the regeneration part is installed;
A fifth damper is installed on the downstream side of the dehumidifying unit, and a sixth damper is installed on the downstream side of the regeneration unit,
The air conditioning system according to claim 1 or 2, wherein the opening degree of these dampers is configured to be controlled based on a detection value of the differential pressure sensor.   The air conditioning system according to any one of claims 1 to 3, wherein a purge sector is installed between the dehumidifying unit and the regenerating unit of the dry dehumidifying device.

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