JP2017227414A - Humidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of preventing capacity deterioration, damage, and the like caused by precipitation of evaporation residues included in water supply by using a simple and rational configuration in a humidifier that has a vaporization type humidification section and a heating type humidification section and uses drain water in the vaporization type humidification section for humidification in the heating type humidification section.SOLUTION: A humidifier 100 includes: a vaporization type humidification section A for impregnating a wet member 6 with water supply SW and vaporizing seepage water PW of the wet member 6 by coming into contact with air; and a heating type humidification section B for introducing drain water DW in the wet member 6 to a heating storage section 8a and evaporating storage water RW in the heating storage section 8a by heating. The humidifier further includes: a water discharge section 12 capable of discharging the storage water RW in the heating storage section 8a; and storage water updating processing means 32 for executing storage water updating processing for updating the storage water RW in the heating storage section 8a by discharging the storage water RW in the heating storage section 8a by using the water discharge section 12 on the basis of a predetermined updating condition.SELECTED DRAWING: Figure 1

Description

  The present invention introduces a vaporization type humidification unit that permeates water into a wet member and vaporizes the permeated water of the wet member by contact with air, and introduces drain water of the wet member into the heat storage unit. It is related with the humidification apparatus provided with the heating-type humidification part which evaporates the stored water of this.

Conventionally, as a humidifying device for humidifying air, a combination of a vaporizing humidifier having excellent energy saving but low humidifying capacity and a heating humidifier having low humidifying ability but low energy saving is known. (See Patent Document 1). That is, in such a humidifying device, the heating humidifier is performed only when the vaporizing humidifier is insufficient and the humidifying capability is insufficient, such as when the temperature of the air is low, while giving priority to humidification by the vaporizing humidifier. By performing the humidification by, it is possible to achieve both energy saving and humidification capability.
Further, in the humidifying device having both the vaporizing humidifier and the heating humidifier, the drain water discharged without vaporizing from the wet member of the vaporizing humidifier is introduced into the heating reservoir. Used for humidification by the heating humidifier.

JP 2001-336789 A

  The water supply supplied to such a humidifier generally includes evaporation residues that remain even when water evaporates, such as scale components such as calcium and magnesium. Therefore, in the vaporization type humidification unit, such a water supply is permeated into the wet member and a part thereof is vaporized, so that the drain water dripped from the permeation member has a high concentration of evaporation residue (hereinafter simply referred to as “concentration”). It may be called.)

  And in the humidification device which introduces the drain water of the vaporization type humidification part concentrated in this way into the heating storage part and uses it for humidification of the heating type humidification part, the humidification apparatus provided only with a general heating type humidification part Compared with, the precipitation of the evaporation residue in the heating storage part becomes remarkable. Therefore, in the heating humidifier, there is a problem such as a reduction in performance or damage of the heating humidifier due to the deposited evaporation residue. Further, such evaporation residue deposition may also occur in the wet member of the vaporizing humidifier, which may cause a decrease in performance or damage of the vaporizing humidifier.

  In view of this situation, the main problem of the present invention is that it includes a vaporizing humidifier and a heating humidifier, and is included in the water supply in a humidifier that uses drain water of the vaporizing humidifier to humidify the heated humidifier. Therefore, the present invention is to provide a technique capable of preventing a decrease in capacity, damage, and the like associated with precipitation of evaporation residue, with a simple and rational configuration.

A first characteristic configuration of the present invention is a vaporizing humidifying unit that permeates water into a wet member and vaporizes the permeated water of the wet member by contact with air;
A humidifying device comprising: a heating-type humidifying unit that introduces drain water of the wet member into a heating storage unit, and evaporates the stored water of the heating storage unit by heating;
A drainage part capable of draining the stored water of the heating storage part,
On the basis of a predetermined update condition, a storage water update processing unit is provided for performing a stored water update process for draining the stored water of the heating storage unit by the drainage unit and updating the stored water of the heating storage unit. is there.

  According to this configuration, when the drain water concentrated by partial vaporization in the vaporizing humidification unit is introduced into the heating storage unit and used for humidification of the heating humidification unit, the predetermined update condition is appropriately set. Based on this, the stored water update process is executed to appropriately drain the stored water in the heating storage section, so that the degree of concentration of the stored water in the heating storage section can be kept low. Therefore, in the heating humidification unit using the drain water of the vaporization type humidification unit, it is possible to suppress precipitation of evaporation residue and prevent deterioration in performance or damage due to the precipitation, and the vaporization type humidification unit and the heating type Two-stage humidification with the humidification unit can be efficiently performed by using the drain water of the vaporization type humidification unit for humidification of the heating type humidification unit.

The second characteristic configuration of the present invention includes a sprinkler for sprinkling water from the outside to the wet member,
The heating storage section is constituted by a drain water storage tank that receives and stores the drain water of the wet member.

  According to this configuration, since the concentrated drain water is not supplied again to the wet member of the vaporizing humidifier, water from the outside with a low degree of concentration is sprinkled. Precipitation can be suppressed. On the other hand, in the drain water storage tank, it is possible to receive and store the drain water of the wet member having a relatively low degree of concentration, so the frequency of the stored water renewal processing, for example, is relatively low while simplifying the device configuration. Even in this case, the concentration of the stored water can be kept low, and the evaporation residue can be appropriately suppressed.

The third characteristic configuration of the present invention includes a water supply amount adjustment unit capable of adjusting a water supply amount to the wet member,
The drainage part is an overflow part that overflows and drains excess water exceeding a predetermined water level of the heating storage part,
The stored water update processing means, in the stored water update process, by temporarily increasing the amount of water supplied to the wet member by the water supply amount adjustment unit to overflow the excess water from the overflow part and drain it, It exists in the point which updates the stored water of the said heating storage part.

  According to this configuration, in the stored water renewal process, the amount of water supplied to the wet member is temporarily increased by the water supply amount adjustment unit, thereby increasing the drain water of the wet member, and a large amount of drain water having a low degree of concentration. Can be supplied to the heat storage section. Thereby, in the heat storage part, the existing stored water with a high degree of concentration can be drained by the overflow part. As a result, the drain water with a low degree of concentration is newly stored, and the stored water in the heat storage part is stored. Can be updated.

4th characteristic structure of this invention is equipped with the water level sensor in the said heating storage part,
Water level maintenance that controls the water supply amount adjustment unit based on the detection result of the water level sensor to maintain the water level of the stored water in the heating storage unit at a predetermined water level at a normal time other than the execution time of the stored water update process It is in the point provided with the water level maintenance control means which performs control.

  According to this configuration, during normal times when it is not necessary to update the stored water in the heating storage unit, the water level maintenance control is executed, the amount of water supplied to the wet member is controlled based on the detection result of the water level sensor, and heating is performed. The level of the stored water in the storage unit can be maintained at a predetermined level. As a result, the water level of the stored water in the heating storage unit is stabilized at normal times, and while the heating humidification unit is appropriately heated, unnecessary drainage from the heating storage unit is suppressed, and the amount of water consumed is reduced. Can be saved.

5th characteristic structure of this invention is equipped with the drain pan which receives the waste_water | drain from the drainage part of the said heating storage part,
An air conditioner heat exchanger that is disposed upstream of the wet member along the air flow direction and controls the temperature of the air,
The drain pan is arranged to receive the drain water of the heat exchanger for air conditioning in addition to the drainage from the drainage section of the heating storage section.

  According to this structure, the drainage which receives the waste_water | drain from the waste_water | drain part of a heating storage part can be smoothly performed without a hindrance by providing the drain pan. In addition, when a temperature-controlled air is humidified by the vaporizing humidifier by incorporating a wet member downstream of the air conditioning heat exchanger in the air passage, this drain pan is added for drainage of the heating reservoir. Therefore, it can also be used for the drain water of the heat exchanger for air conditioning.

Schematic block diagram of the humidifier of the first embodiment Schematic block diagram of the humidifying device of the second embodiment

[First Embodiment]
A first embodiment of a humidifier according to the present invention will be described with reference to FIG.
The humidifying device 100 shown in FIG. 1 is installed in a form that connects to a duct that takes in outside air from the outside to the inside, for example, in a commercial facility or a house. And the external air taken in from the outdoors flows through the ventilation path 1, and the air humidified through the ventilation path 1 is supplied indoors. That is, humidification sections A and B for humidifying the air flowing through the ventilation path 1 are arranged in the ventilation path 1 of the humidifying apparatus 100. Further, the humidifying apparatus 100 includes a control device 30 for controlling the operation and various types. Auxiliary equipment is provided.

The humidifier 100 is a so-called hybrid humidifier having a combination of a vaporizing humidifier A that is excellent in energy saving but low in humidifying capacity and a heating humidifier B that is inferior in energy saving but has high humidifying ability. It is configured.
Hereinafter, the detailed configurations of the vaporizing humidifier A and the heating humidifier B will be described in order.

The vaporizing humidifier A is supplied with tap water or the like as a feed water SW from the outside, permeates the feed water SW from the outside into the wet member 6, and vaporizes the permeate water PW of the wet member 6 by contact with air. And it is comprised as a humidification part which humidifies the air which flows through the ventilation path 1. FIG.
The wet member 6 is made of a member having water permeability and air permeability, and is disposed in a posture that covers the flow path cross section of the ventilation path 1. Therefore, in this wet member 6, the supply water SW penetrates and the relatively low-humidity air flowing through the ventilation path 1 passes, whereby the vaporization of the permeated water PW of the wet member 6 is promoted, and the passing air is It will be humidified.

  The vaporizing humidifier A is provided with a sprinkler 4 that sprinkles the water supply SW onto the wet member 6. The sprinkling part 4 is made of a pipe material arranged along the horizontal direction above the wet member 6, and is wet below the perforated holes (not shown) in which the water supply SW supplied to the inside is dispersedly arranged in the lower part. Water can be sprayed on the upper end of the member 6. In addition, a water supply amount adjustment valve 3 (an example of a water supply amount adjustment unit) that can adjust the water supply amount to the wet member 6 is provided on the upstream side of the water sprinkling unit 4 in the flow direction of the water supply SW.

  Thus, when the water supply SW is sprinkled on the wet member 6 of the vaporizing humidifier A, the water supply SW penetrates into the wet member 6. A part of the permeated water PW that has permeated the wet member 6 in this way is vaporized by contacting with the relatively low-humidity air that passes through the wet member 6. The vaporized water is mixed with air, so that the air flowing through the ventilation path 1 is humidified.

  Further, the permeated water PW that has fallen without being vaporized in the wet member 6 is dripped from the lower end of the wet member 6 as drain water DW, and is received by the drain water storage tank 8 disposed below the drain water DW. It is stored as the stored water RW of the storage tank 8.

The heating-type humidification unit B is configured as a humidification unit that introduces the drain water DW of the wet member 6 into the heating storage unit 8a and evaporates the stored water RW of the heating storage unit 8a by heating.
In addition, the heating storage part 8a is comprised as a part of drain water storage tank 8 which receives the drain water DW of the wet member 6, and stores it. Specifically, the drain water storage tank 8 receives the drain water DW of the wet member 6 at a portion upstream in the air flow direction of the ventilation path 1 and uses the received drain water DW as the stored water RW. It introduces into the heating storage part 8a which is a downstream part in the flow direction.

An electric heater 9 capable of heating the stored water RW of the heating storage section 8a is disposed in the heating storage section 8a of the drain water storage tank 8, and the electric heater 9 is configured to switch power supply from the heater power source 10. The operation and the stop are switched. In addition, a steam supply port 8 b that opens to the downstream side of the wet member 6 in the ventilation path 1 is formed above the installation location of the electric heater 9 in the heating storage portion 8 a.
And if the electric heater 9 of the heating-type humidification part B is operated, the stored water RW of the heating storage part 8a will be heated and boiled, and the water vapor | steam S will generate | occur | produce. The water vapor S is introduced into the ventilation path 1 through the water vapor supply port 8b, whereby the air flowing through the ventilation path 1 can be humidified.

  Further, on the heat storage section 8a side of the drain water storage tank 8, as a drainage section capable of draining the stored water RW of the heating storage section 8a, excess water exceeding the predetermined water level of the heating storage section 8a is overflowed and drained. An overflow portion 12 is provided. That is, the stored water RW in the drain water storage tank 8 increases by receiving the drain water DW from the wet member 6, while decreasing by evaporating into the water vapor S in the heating storage unit 8 a. Therefore, when the amount of the drain water DW received is larger than the amount of the generated water vapor S, the water level of the drain water storage tank 8 rises, and when the water level exceeds a predetermined water level, Excess water corresponding to the excess amount is discharged from the overflow part 12.

A drain pan 14 that receives drainage from the overflow portion 12 is provided below the overflow portion 12. That is, the excess water discharged from the overflow portion 12 is received by the drain pan 14 disposed below the drain water and then drained to the outside.
Further, the drain water storage tank 8 is provided with a conductivity sensor 19 for measuring the conductivity of the stored water RW and a water level sensor 20 for measuring the water level.

  In the ventilation path 1, the wet member 6 of the vaporizing humidifier A is disposed on the upstream side of the water vapor supply port 8 b of the heating humidifier B. Thus, relatively low-humidity air passes through the wet-type member 6 regardless of the operation of the heating-type humidification unit B, and the humidification ability of the vaporization-type humidification unit A is maintained as high as possible. become.

A temperature sensor 16 for measuring the temperature of the outside air OA introduced into the ventilation path 1 and a humidity sensor 17 for measuring the humidity of the outside air OA are provided on the upstream side of the wet member 6 in the ventilation path 1. When humidifying the air flowing through the ventilation path 1, the control device 30 determines the humidity of the air supplied indoors through the ventilation path 1 based on the measurement results of the temperature sensor 16 and the humidity sensor 17. The required humidification amount required to obtain the target humidity is calculated, the opening degree of the water supply amount adjustment valve 3 is adjusted, and the amount of the water supply SW is set to the necessary humidification amount. Then, the water supply SW is first supplied to the wet member 6 of the vaporizing humidifier A to be vaporized. For example, when the outside air OA is in a low temperature state or a low humidity state, the vaporizing humidifier A alone has insufficient humidifying capacity. The water that could not be vaporized is dripped from the wet member 6 as the drain water DW, received in the drain water storage tank 8, and stored as the stored water RW. Then, the control device 30 operates the electric heater 9 to heat the stored water RW dropped in the drain water storage tank 8 without being completely vaporized in the vaporizing humidifier A, and humidifying the heated humidifier B. Run.
As a result, in the heating humidifier B, the operation is limited to the extent that the humidifying capacity of the vaporizing humidifier A is replenished, and the heating humidifier B is operated. It is possible to save the energy required to reduce the amount of water consumed by limiting the amount of water supplied to the required amount of humidification.

The control device 30 is configured to function as a water level maintenance control unit 31 and a stored water update processing unit 32 in order to maintain the stored water RW in the drain water storage tank 8 in an appropriate state. Although details will be described later, during normal times other than when the stored water update process is executed, water level maintenance control by the water level maintenance control means 31 is executed, and based on a predetermined update condition, storage by the stored water update processing means 32 is performed. Water renewal processing is executed as appropriate.
Below, the water level maintenance control by the water level maintenance control means 31 and the details of the stored water update processing by the stored water update processing means 32 will be described in order.

(Water level maintenance control)
The water level maintenance control means 31 in which the control device 30 functions controls the water supply amount adjustment valve 3 based on the detection result of the water level sensor 20 at a normal time other than the execution time of the stored water update process to be described later, and the heating storage unit It is comprised so that the water level maintenance control which maintains the water level of the stored water RW of 8a at a predetermined water level may be performed.

In this water level control maintenance control, the water level of the stored water RW in the heated storage unit 8a (drain water storage tank 8) detected by the water level sensor 20 is a predetermined water level where the excess water drained from the overflow unit 12 is 0 or a small amount. Thus, the opening of the water supply amount adjusting valve 3 is adjusted so that the water supply amount to the wet member 6 is adjusted. Specifically, the water supply amount to the wet member 6 is basically set to a required humidification amount for setting the air humidity to the target humidity, but when the water level detected by the water level sensor 20 exceeds a predetermined water level. When it judges, the said water supply amount is decreased and the overflow drainage of excess water is suppressed.
And by performing such water level maintenance control, in the normal time, useless drainage from the heating storage part 8a is suppressed, and the amount of water consumption is saved.

  In the humidifying device 100 as described above, in the heating storage unit 8a, drain water DW in which evaporation residue such as a scale component is concentrated in the vaporization humidification unit A is supplied, and the drain water is heated in the heating humidification unit B. Since it evaporates, the evaporation residue is likely to precipitate. Therefore, the humidifier 100 is configured to avoid such a problem by executing a stored water update process described below.

(Reserved water update process)
Based on a predetermined update condition, the stored water update processing means 32 in which the control device 30 functions drains the stored water RW of the heating storage unit 8a by the drainage unit that is the overflow unit 12, and the stored water of the heating storage unit 8a. It is comprised so that the stored water update process which updates may be performed.
Specifically, in the stored water update process 32, the stored water update processing means 32 temporarily increases the amount of water supplied to the wet member 6 by the water supply amount adjustment valve 3 to overflow the excess water from the overflow portion 12 and drain it. Thereby, the stored water of the heating storage part 8a is updated.

  That is, in the stored water renewal process, at the timing when the degree of concentration of the evaporation residue in the stored water RW of the drain water storage tank 8 including the heating storage unit 8a is considered to have increased excessively, temporarily, the water supply amount adjustment valve 3 The amount of water supplied to the wet member 6 is increased more than usual. Then, the amount of the permeated water PW passing through the wet member 6 is increased, and the amount of water vaporized by the wet member 6 is not substantially changed. Therefore, the wet member 6 to the drain water storage tank 8 is more than normal. Drain water DW having a relatively low degree of concentration is supplied in a larger amount than usual.

  In this way, when a large amount of drain water DW is newly supplied to the drain water storage tank 8 with a lower concentration level than normal, the stored water RW having a high concentration level that has been stored in the drain water storage tank 8 until then is obtained. It is pushed out from the overflow part 12 and discharged. Thus, the stored water RW in the drain water storage tank 8 is renewed to a low concentration level. As a result, in the heating humidifier B that uses the drain water DW of the vaporizing humidifier A, it is possible to suppress the evaporation residue from being deposited, and it is possible to prevent deterioration in performance and damage due to the precipitation.

  In addition, as said update conditions for determining the execution timing of the stored water update process, it sets based on the parameter | index which can recognize the excessive increase of the concentration degree of the stored water RW in the drain water storage tank 8 directly or indirectly. can do. In this embodiment, the execution timing of the stored water update process is determined using the measurement result of the conductivity sensor 19 provided in the drain water storage tank 8 or the time measurement result by a timer (not shown).

  Specifically, when the measurement result of the conductivity sensor 19 is used, the stored water update processing unit 32 indicates that the conductivity of the stored water RW in the drain water storage tank 8 measured by the conductivity sensor 19 is equal to the stored water. The stored water update process is executed to update the stored water RW at a timing at which the degree of RW concentration reaches a predetermined threshold at which the evaporation residue may be precipitated.

Moreover, when using the measurement result of a timer, the stored water update process means 32 measures the operation time of the heating humidification part B in the elapsed time from the execution time of the last stored water update process, and the elapsed time. Then, at the timing when the concentration time of the stored water RW reaches a set time that is predicted to have increased to such a degree that the evaporation residue may be deposited, the stored water renewal process is executed to perform the storage. Update water RW.
Then, by executing the stored water update process based on such update conditions, the degree of concentration of the stored water RW in the drain water storage tank 8 can be always kept low, and precipitation of evaporation residue can be reliably suppressed. it can.

[Second Embodiment]
2nd Embodiment of the humidification apparatus which concerns on this invention is described based on FIG.
The humidifier 200 according to the second embodiment is configured as the air conditioning unit 50 such as an air handling unit capable of controlling the temperature of the air in addition to the humidification of the air. In other respects, the same configuration as that of the first embodiment is mainly employed. Therefore, in the following, the details of the different configuration will be added, and description of the same configuration as in the first embodiment will be omitted.

  That is, the fan 2 which generates the ventilation power of the ventilation path 1 is provided in the ventilation path 1 of the air conditioning unit 50. And by operating this fan 2, the air taken in from the intake port 1a flows through the ventilation path 1, and the temperature-controlled and humidified air passes through the ventilation path 1 and is supplied indoors from the air supply port 1b. Is done. That is, the ventilation path 1 is provided with an air conditioning heat exchanger 25 that is arranged upstream of the wet member 6 along the air flow direction and controls the temperature of the air. The air-conditioning heat exchanger 25 is the same as that used in known air-handling units, air-conditioning units such as external air conditioners, etc., and exchanges heat with hot or cold water flowing inside. Thus, the air flowing through the ventilation path 1 is heated or cooled. That is, the air conditioning unit 50 can adjust the temperature of the air in addition to the humidification of the air.

  In such a heat exchanger 25 for air conditioning, when air is cooled (that is, during cooling), moisture in the air is condensed and drain water is discharged. Therefore, in addition to drainage from the overflow part 12 of the heat storage part 8a, in addition to drainage of the heat storage part 8a, the drain pan 14 is also used for drainage of the heat storage part 8a, and heat for air conditioning. It arrange | positions so that the drain water discharged | emitted at the time of air cooling of the exchanger 25 may be received.

[Another embodiment]
(1) In the above embodiment, the storage water RW of the heating storage unit 8a is configured to be used only for humidification of the heating humidification unit B. For example, the storage water RW is recycled to the wet member 6. Thus, the vaporizing humidifier A may be configured to be reused.

(2) In the said embodiment, although the heat storage part 8a of the heating-type humidification part B was provided in the drain water storage tank 8 which receives and stores the drain water DW of the wet member 6, for example, a heat storage part is drain water. You may comprise as a tank part different from a storage tank, and it may be comprised so that the drain water of the wet member received in the drain water storage part may be supplied to another heating storage part.

(3) In the said embodiment, although the overflow part 12 which overflows and drains the excess water exceeding the predetermined water level of the said heating storage part 8a was provided as a drainage part which drains the stored water RW of the heating storage part 8a, for example, As the drainage part, a drainage hole that opens at the bottom of the heating storage part and a drainage valve leading to the drainage hole may be provided, and the drainage valve may be opened to drain the stored water in the heating storage part.

(4) In the above-described embodiment, the water level maintenance control for controlling the water supply amount adjustment valve 3 based on the detection result of the water level sensor 20 is executed in a normal state, thereby changing the water level of the stored water RW in the heating storage unit 8a. Although it was configured so that the excess water drained from the overflow part 12 is maintained at a predetermined water level that becomes 0 or a small amount, for example, without performing the water level maintenance control, in a normal time, the amount of water supplied to the wet member is You may comprise so that it may be kept constant.

3 Water supply amount adjustment valve (Water supply amount adjustment unit)
4 Water sprinkling unit 6 Wet member 8 Drain water storage tank 8a Heating storage unit 12 Overflow unit 14 Drain pan 20 Water level sensor 25 Air conditioning heat exchanger 31 Water level maintenance control unit 32 Storage water update processing unit 100 Humidifier 200 Humidifier A Vaporization type humidification Part B Heating humidifier DW Drain water OA Outside air PW Permeated water RW Reserved water SW Water supply

Claims (5)

A vaporizing humidifier that permeates the wet water into the wet member and vaporizes the permeated water of the wet member by contact with air; and
A humidifying device comprising: a heating-type humidifying unit that introduces drain water of the wet member into a heating storage unit, and evaporates the stored water of the heating storage unit by heating;
A drainage part capable of draining the stored water of the heating storage part,
Based on a predetermined update condition, a humidifier provided with a stored water update processing means for executing a stored water update process for draining the stored water of the heating storage unit by the drainage unit and updating the stored water of the heating storage unit. . While having a water sprinkling part for sprinkling water from the outside to the wet member,
The humidification device according to claim 1, wherein the heating storage unit is configured by a drain water storage tank that receives and stores the drain water of the wet member. A water supply amount adjustment unit capable of adjusting the water supply amount to the wet member;
The drainage part is an overflow part that overflows and drains excess water exceeding a predetermined water level of the heating storage part,
The stored water update processing means, in the stored water update process, by temporarily increasing the amount of water supplied to the wet member by the water supply amount adjustment unit to overflow the excess water from the overflow part and drain it, The humidification device according to claim 1 or 2 which updates storage water of said heating storage part. A water level sensor is provided in the heating storage section,
Water level maintenance that controls the water supply amount adjustment unit based on the detection result of the water level sensor to maintain the water level of the stored water in the heating storage unit at a predetermined water level at a normal time other than the execution time of the stored water update process The humidification apparatus of Claim 3 provided with the water level maintenance control means to perform control. Comprising a drain pan that receives drainage from the drainage section of the heating reservoir,
An air conditioner heat exchanger that is disposed upstream of the wet member along the air flow direction and controls the temperature of the air,
The humidification according to any one of claims 1 to 4, wherein the drain pan is disposed so as to receive drain water of the heat exchanger for air conditioning in addition to drainage from the drainage unit of the heating storage unit. apparatus.

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