JP2021148300A - Humidifying unit - Google Patents

Abstract

To provide a humidifying unit that can protect peripheral components from heat of a heater.SOLUTION: A humidifying unit 3 for humidifying a target space S1 comprises: an adsorbing member 41a comprising a moisture adsorbing region A1 to which moisture is adsorbed, and a moisture releasing region A2 from which the moisture is released; a heater 42 for heating the moisture releasing region A2 of the adsorbing member 41a; a first fan 43 for generating an air flow; a case 47 for housing the adsorbing member 41a, the heater 42, and the first fan 43; a first control circuit 81A for controlling the first fan 43; and a second control circuit 82A for controlling the heater 42. The case 47 comprises a first air passage P1 through which air introduced from the outdoors by the first fan 43 is discharged to the target space S1 via the moisture releasing region A2 of the adsorbing member 41a. When a rotation speed of the first fan 43 is a predetermined first threshold value or less, the heater 42 is stopped.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a humidifying unit.

Patent Document 1 discloses a humidity control device that humidifies a room. This humidity control device includes a housing that houses a heater, a humidity control member, and a fan. The housing is formed with a first flow path for discharging the air introduced from the outside by the fan to the outside and a second flow path for supplying the air introduced from the outside by the fan to the room. The air flowing through the first flow path is adsorbed by the humidity control member and discharged to the outside. The air flowing through the second flow path is heated by the heater, then humidified by the humidity control member, and supplied to the room.

Japanese Unexamined Patent Publication No. 2006-170492

In this humidity control device, the heater rises to about 200 ° C to 300 ° C, so when the air flow in the second flow path is stopped due to the fan stopping, the parts arranged around the heater heat up. May be damaged by. The humidity control device described in Patent Document 1 does not consider the operation of the heater in such a case.

It is an object of the present disclosure to provide a humidifying unit capable of protecting peripheral parts from the heat of a heater.

(1) The present disclosure is a humidification unit that humidifies the target space.
An adsorption member having a moisture absorbing region for adsorbing moisture and a moisture releasing region for releasing moisture,
A heater that heats the moisture-releasing region of the adsorption member, and
The first fan that generates the air flow and
A housing that houses the suction member, the heater, and the first fan.
The first control circuit that controls the first fan and
A second control circuit for controlling the heater is provided.
The housing has a first air passage in which air taken in from the outside by the first fan is blown out to the target space via a moisture-releasing region of the adsorption member.
When the rotation speed of the first fan is equal to or less than a predetermined first threshold value, the heater is stopped.

According to the above configuration, the heater is stopped when the rotation speed of the first fan is equal to or less than the first threshold value. Therefore, when the first fan is stopped or is rotating at a speed lower than a predetermined value, the heater is stopped. Peripheral parts can be protected from the heat of.

(2) Preferably, the humidification unit further includes a signal transmission circuit that connects the first control circuit and the second control circuit.
When the rotation speed of the first fan is equal to or lower than the first threshold value, the first control circuit transmits a predetermined signal to the signal transmission circuit, and the second control circuit stops the heater based on the signal. Let me.
With such a configuration, the rotation speed of the first fan can be easily grasped by the first control circuit that controls the first fan, and based on the signal transmitted from the first control circuit according to the rotation speed. The second control circuit can stop the heater.

(3) Preferably, the signal transmission circuit has a switch.
The first control circuit opens and closes the switch according to whether or not the rotation speed of the first fan is equal to or lower than the first threshold value, and the second control circuit opens and closes the switch based on the open / closed state of the switch. Stop the heater.

(4) Preferably, the second control circuit includes a power supply circuit that supplies electric power from the power supply to the heater.
When the rotation speed of the first fan is equal to or lower than the first threshold value, the power supply from the power supply to the power supply circuit is cut off.
According to this configuration, when the rotation speed of the first fan is equal to or less than the first threshold value, the heater can be reliably stopped by making it impossible to supply electric power to the heater.

(5) Preferably, the second control circuit transmits an instruction signal for stopping the heater to the power supply circuit when the rotation speed of the first fan is equal to or less than the first threshold value. A process of cutting off the energization from the power supply to the power supply circuit is performed.
According to this configuration, the second control circuit can reliably stop the heater by performing both a process of controllingly stopping the heater and a process of cutting off the energization from the power supply to the power supply circuit. ..

(6) Preferably, the housing is provided with an outlet that blows out air humidified in the moisture release region into the target space.
Further equipped with a temperature detector that detects the temperature of the air blown out from the outlet,
When the temperature detector detects a temperature equal to or higher than a predetermined temperature, the heater is stopped.
According to this configuration, if the air volume of the air by the first fan is smaller than the predetermined temperature, the temperature at the air outlet may rise and damage the surrounding parts. Therefore, the temperature detector detects the temperature above the predetermined temperature. Occasionally, the heater can be stopped to protect peripheral components.

(7) Preferably, a second fan for generating an air flow having a larger air volume than the air flow generated by the first fan is provided.
The housing includes a second air passage through which air taken in from the outside by the second fan is discharged to the outside via a moisture absorbing region of the adsorption member, and the first air passage and the second air passage. It has an intake that takes in air,
The first air passage and the second air passage are composed of a common air passage from the intake to the suction member.
The heater is stopped when the air volume of the air flow generated by the second fan is larger than a predetermined value with respect to the air volume of the air flow generated by the first fan.
According to this configuration, when the air is drawn from the intake of the housing to the suction member in the first and second air passages not only by the first fan but also by the second fan, the air volume of the second fan If is increased relative to the first fan, it becomes difficult for air to flow to the heater side by the first fan, and the temperature of the heater may rise. Therefore, peripheral parts can be protected by stopping the heater when the air volume of the air flow generated by the second fan is larger than a predetermined value with respect to the air volume of the air flow generated by the first fan. ..

(8) Preferably, the heater is stopped when the rotation speed of the second fan is larger than the second threshold value set with reference to the rotation speed of the first fan.
According to this configuration, the heater stop control can be easily performed by comparing the air volume of the first fan and the air volume of the second fan with the rotation speed of each fan.

(9) Preferably, the humidifying unit is
The first control board on which the first control circuit is provided and
It includes a second control board on which the second control circuit is provided.

(10) Preferably, the first control board and the second control board are arranged adjacent to each other.
According to this configuration, it is possible to facilitate operations such as maintenance and inspection of the first control board and the second control board.

It is a schematic diagram of the humidification unit which concerns on embodiment of this disclosure. It is an external perspective view of the housing of a humidification unit. It is a schematic plan view which removed the top plate of a housing. It is a schematic bottom view which removed the panel of a housing. It is a schematic front view which removed the front plate of a housing. FIG. 3 is a schematic cross-sectional view taken along the line CC of FIG. It is a D arrow view of FIG. It is a schematic cross-sectional view in the EE arrow view of FIG. It is F arrow view of FIG. It is a top view of the moisture absorption rotor. It is an exploded perspective view which shows the moisture absorption rotor. It is a perspective view of a heater. It is a block diagram which shows schematic | control device of a humidification unit. It is a block diagram which shows the modification of the control device of a humidification unit schematicly.

Hereinafter, embodiments will be described with reference to the accompanying drawings.
<Overall configuration of humidification unit>
FIG. 1 is a schematic view of a humidifying unit 3 according to the embodiment of the present disclosure.
The humidification unit 3 humidifies and ventilates the target space S1. The target space S1 is, for example, a space in a room partitioned by a ceiling wall 4, a side wall 5, and a floor wall (not shown).

The humidifying unit 3 introduces outdoor air to humidify it, and blows out the humidified air to the target space S1. The humidification unit 3 includes a moisture absorption rotor 41, a heater 42, a first fan 43, a second fan 44, a temperature / humidity sensor 45, a control device 46, a housing 47, an introduction duct 48, an exhaust duct 49, and the like.

The housing 47 accommodates the above devices 41 to 46. The housing 47 includes a housing body 50, a panel 51, an introduction connection pipe 52, and a discharge connection pipe 53. Most of the housing body 50 is arranged in the attic space S2. The lower end of the housing body 50 is arranged so as to penetrate the ceiling wall 4. The attic space S2 is a space formed above the ceiling wall 4. The lower end of the housing body 50 is open and closed by the panel 51.

The panel 51 is detachably attached to the lower end of the housing body 50. The entire lower surface of the panel 51 is exposed to the target space S1. The panel 51 is formed with a plurality of openings 54, 72 that communicate the inside of the housing body 50 with the target space S1. The opening includes an outlet 54 for blowing air from the housing body 50 into the target space S1. A temperature sensor 60 for detecting the temperature of the air blown out from the air outlet 54 is provided in the vicinity of the air outlet 54. The opening includes an inflow port 72 that allows air in the target space S1 to flow into the housing body 50. A temperature / humidity sensor 45 for detecting the temperature and humidity of the air in the target space S1 flowing in from the inflow port 72 is provided in the vicinity of the inflow port 72.

One end of the introduction connection pipe 52 and one end of the discharge connection pipe 53 are connected to the housing body 50. The opening on the other end side of the introduction connection pipe 52 is an intake 55 for taking in outdoor air. The opening on the other end side of the discharge connection pipe 53 is a discharge port 56 for discharging air to the outside. The intake port 55 and the discharge port 56 may be configured by openings formed in the wall surface of the housing body 50 without using the introduction connection pipe 52 and the discharge connection pipe 53.

The housing 47 has a first air passage P1 and a second air passage P2. The first air passage P1 and the second air passage P2 are "humidifying air passages" used for humidifying the target space S1. The outdoor air introduced into the housing 47 from the intake port 55 flows through the first air passage P1 to the air outlet 54. The outdoor air introduced into the housing 47 from the intake port 55 flows through the second air passage P2 to the discharge port 56.

The housing 47 further has a third air passage P3 and a fourth air passage P4.
The third air passage P3 is a "state detection air passage" used for detecting the temperature and humidity which are the states of the air in the target space S1. The air in the target space S1 that has flowed into the housing 47 from the inflow port 72 flows through the third air passage P3. The third air passage P3 merges with the second air passage P2. The air flowing through the third air passage P3 is discharged from the discharge port 56 together with the air flowing through the second air passage P2.

The fourth air passage P4 is a "cooling air passage" used for cooling the heat generating parts included in the control device 46. The outdoor air introduced into the housing 47 from the intake port 55 flows through the fourth air passage P4. The fourth air passage P4 joins the second air passage P2 after cooling the heat generating component. The air flowing through the fourth air passage P4 is discharged from the discharge port 56 together with the air flowing through the second air passage P2.

One end of the introduction duct 48 is connected to the introduction connection pipe 52 of the housing 47. The other end of the introduction duct 48 penetrates the side wall 5 and communicates with the outside. The introduction duct 48 of the present embodiment is a first introduction duct for introducing outdoor air from the inlet 55 into the first air passage P1, and an introduction duct 48 for introducing outdoor air from the inlet 55 into the second air passage P2. It also serves as a second introduction duct and a fourth introduction duct for introducing outdoor air into the fourth air passage P4.

One end of the discharge duct 49 is connected to the discharge connection pipe 53 of the housing 47. The other end of the discharge duct 49 penetrates the side wall 5 and communicates with the outside. The air flowing through the second air passage P2 is discharged to the outside from the discharge port 56 through the discharge duct 49.

The moisture absorption rotor (adsorption device) 41 is arranged in the middle of the first air passage P1 and the second air passage P2. The moisture absorption rotor 41 is configured to take moisture from the air flowing through the second air passage P2 and release the moisture to the air flowing through the first air passage P1 to humidify the air. The heater 42 is provided in the middle of the first air passage P1 and warms the air flowing through the first air passage P1 before humidification.

The first fan 43 is arranged in the vicinity of the air outlet 54 in the first air passage P1. The first fan 43 generates an air flow in the first air passage P1. Specifically, the first fan 43 is a position where outdoor air can be introduced into the first air passage P1 via the introduction duct 48 and blown out from the outlet 54 to the target space S1 via the moisture absorption rotor 41. Is located in.

The second fan 44 is arranged in the vicinity of the discharge port 56 in the second air passage P2. The second fan 44 generates an air flow in the second air passage P2. Specifically, the second fan 44 is positioned so that outdoor air can be introduced into the second air passage P2 via the introduction duct 48 and discharged to the outside from the discharge port 56 via the moisture absorption rotor 41. Have been placed. The second fan 44 also generates an air flow in the third air passage P3 and the fourth air passage P4.

The temperature / humidity sensor 45 is provided in the housing body 50 and detects the temperature and humidity of the air in the target space S1. The temperature sensor 60 is provided in the housing body 50 and detects the temperature of the air blown out into the target space S1. The detected values of the temperature / humidity sensor 45 and the temperature sensor 60 are input to the control device 46. The first fan 43 and the second fan 44 are provided with a rotation detection sensor (not shown) such as an encoder, and the detection value of the rotation detection sensor is also input to the control device 46. The control device 46 controls the operations of the moisture absorbing rotor 41, the heater 42, the first fan 43, and the second fan 44 based on the detected values of the various sensors 45 and 60.

The humidification unit 3 performs "humidification operation" and "ventilation operation". In the humidification operation, the control device 46 operates the moisture absorption rotor 41, the heater 42, the first fan 43, and the second fan 44. As a result, the outdoor air passes through the introduction duct 48 and is introduced into the first air passage P1 and the second air passage P2 of the housing body 50. Moisture in the air introduced into the second air passage P2 is taken away by the moisture absorbing rotor 41. The deprived air passes through the discharge duct 49 and is discharged to the outside. The air introduced into the first air passage P1 is humidified by the moisture absorbing rotor 41. The humidified air is blown out from the outlet 54 into the target space S1. The control device 46 performs a humidification operation so that the humidity of the target space S1 detected by the temperature / humidity sensor 45 becomes the target humidity (set humidity).

In the ventilation operation, the control device 46 operates the first fan 43 and the second fan 44, and does not operate the moisture absorbing rotor 41 and the heater 42. As a result, the outdoor air passes through the introduction duct 48 and is introduced into the first air passage P1 and the second air passage P2 of the housing body 50. The air introduced into the first air passage P1 is blown out from the air outlet 54 into the target space S1 without being humidified by the moisture absorbing rotor 41.

In the humidification operation and the ventilation operation, the air volume of the air blown from the air outlet 54 to the target space S1 is larger than the air volume of the air discharged from the target space S1 to the outside through the inflow port 72 and the third air passage P3. It is set to be. Therefore, the inside of the target space S1 becomes a positive pressure due to the air discharged from the air outlet 54. As a result, the air in the target space S1 leaks out of the target space S1 from a place other than the humidifying unit 3, and the target space S1 can be ventilated. Therefore, the humidifying unit 3 of the present embodiment is a humidifying unit of a type (outside air pushing type) that pushes outdoor air into the target space S1.

<Specific configuration of the housing 47>
FIG. 2 is an external perspective view of the housing 47 of the humidifying unit 3. In the following description, expressions such as "top", "bottom", "left", "right", "front", and "rear" may be used to explain the orientation and position. Unless otherwise specified, these expressions follow the directions of arrows X, Y, Z that are orthogonal to each other shown in FIG. Specifically, in the following description, the direction of arrow X (first direction) in FIG. 2 is the left-right direction, the direction of arrow Y (second direction) is the front-back method, and the direction of arrow Z (third direction) is up and down. It's called direction. However, the expressions representing these directions and positions are used for convenience of explanation and do not limit the present disclosure.

The housing body 50 of the housing 47 is formed in a rectangular parallelepiped box shape. The housing body 50 has a front plate 50a, a rear plate 50b, a left side plate 50c, a right side plate 50d, and a top plate 50e. The lower end of the housing body 50 is open and closed by the panel 51.

The rear plate 50b of the housing body 50 is provided with an introduction connection pipe 52 and a discharge connection pipe 53. The housing body 50 is formed to have a longer length in a direction (horizontal direction X) horizontally orthogonal to the length in the direction in which air enters and exits (front-back direction Y) by the introduction connection pipe 52 and the discharge connection pipe 53. ing. An air outlet 54 and an inflow port 72 are formed on the panel 51. In the left-right direction X, the air outlet 54 is arranged on one side of the panel 51, and the inflow port 72 is arranged on the other side of the panel 51. Therefore, the outlet 54 and the inlet 72 are arranged at intervals in the left-right direction X.

FIG. 3 is a schematic plan view of the housing 47 with the top plate 50e removed. FIG. 4 is a schematic bottom view of the housing 47 with the panel 51 removed. FIG. 5 is a schematic front view of the housing 47 with the front plate 50a removed. As shown in FIGS. 3 to 5, devices such as a moisture absorbing rotor 41, a first fan 43, and a second fan 44 are arranged in the housing 47 so as to be distributed in the left-right direction X.

The housing body 50 is provided with a first partition plate 61 that divides the internal space into upper and lower parts. As shown in FIGS. 3 and 5, a second partition plate 62, a third partition plate 63, and a fourth partition plate 64 are provided on the first partition plate 61. As shown in FIGS. 4 and 5, a fifth partition plate 65, a sixth partition plate 66, and a seventh partition plate 67 are provided below the first partition plate 61.

As shown in FIG. 3, the first partition plate 61 is surrounded by the area surrounded by the second and third partition plates 62 and 63 and the third and fourth partition plates 63 and 64 in plan view in FIG. It is provided in an area (an area excluding an area in which the second fan 44 is arranged and an area in which a part of the control device 46 is arranged). An eighth partition plate 68 and a ninth partition plate 69 are further provided in the area where the second fan 44 is provided.

As shown in FIG. 3, the second partition plate 62 includes two vertical plate portions 62a and 62c extending in the front-rear direction Y and an inclined plate portion 62b connecting these vertical plate portions 62a and 62c in a plan view. ,have. The vertical plate portion 62a extends rearward from the front plate 50a of the housing body 50. The vertical plate portion 62c extends forward from the rear plate 50b of the housing body 50. The positions of the vertical plate portion 62a and the vertical plate portion 62c are shifted in the left-right direction X. The inclined plate portion 62b connects the rear end of the vertical plate portion 62a and the front end of the vertical plate portion 62c.

The third partition plate 63 is arranged at intervals in the left-right direction X with respect to the second partition plate 62. The third partition plate 63 has two vertical plate portions 63a and 63c extending in the front-rear direction Y and an inclined plate portion 63b connecting the vertical plate portions 63a and 63c in a plan view. The vertical plate portion 63a extends rearward from the front plate 50a of the housing body 50. The vertical plate portion 63c extends forward from the rear plate 50b of the housing body 50. The positions of the vertical plate portion 63a and the vertical plate portion 63c are shifted in the left-right direction X. The inclined plate portion 63b connects the rear end of the vertical plate portion 63a and the front end of the vertical plate portion 63c.

The fourth partition plate 64 extends in the left-right direction X over the middle portion of the vertical plate portion 63c of the third partition plate 63 in the front-rear direction Y and the right side plate 50d of the housing body 50.

With the above configuration, the first space R1 extending to the front-rear direction Y of the housing body 50 by the second partition plate 62 and the third partition plate 63 on the upper side of the housing body 50 and substantially in the center of the left-right direction X. Is formed. A second space R2 is formed by the third partition plate 63 and the fourth partition plate 64 on the right front side on the upper side of the housing body 50. A third space R3 is formed by the vertical plate portion 63c and the fourth partition plate 64 of the third partition plate 63 on the right rear side of the upper side of the housing body 50.

As shown in FIG. 4, the fifth partition plate 65 arranged below the first partition plate 61 extends forward from the rear plate 50b of the housing body 50. The fifth partition plate 65 is arranged below the vertical plate portion 62c (see FIG. 3) of the second partition plate 62. The sixth partition plate 66 extends in the left-right direction X over the front end of the fifth partition plate 65 and the right side plate 50d of the housing body 50. The seventh partition plate 67 extends in the front-rear direction Y over the middle portion of the sixth partition plate 66 in the left-right direction X and the front plate 50a of the housing body 50.

With the above configuration, the fourth space R4 is formed by the fifth partition plate 65 and the sixth partition plate 66 on the right rear side on the lower side of the housing body 50. A fifth space R5 is formed by a sixth partition plate 66 and a seventh partition plate 67 on the right front side on the lower side of the housing body 50.

The first partition plate 61 does not exist between the third space R3 shown in FIG. 3 and the fourth space R4 shown in FIG. Therefore, the third space R3 and the fourth space R4 are communicated vertically. Electrical components including the control device 46 are arranged in the third space R3 and the fourth space R4. A first fan 43 is arranged in the fifth space R5.

In the housing body 50, the area on the left side of the second partition plate 62 as shown in FIG. 3 and the area on the left side of the fifth partition plate 65 and the seventh partition plate 67 as shown in FIG. It forms a continuously connected sixth space R6. A second fan 44 is arranged in the sixth space R6. The sixth space R6 forms a part of the second air passage P2 (see FIG. 1) through which air flows by the second fan 44.

As shown in FIGS. 3 and 4, the eighth partition plate 68 extends to the right from the left side plate 50c of the housing body 50. The ninth partition plate 69 extends in the front-rear direction Y over the right end of the eighth partition plate 68 and the front plate 50a. The upper ends of the eighth partition plate 68 and the ninth partition plate 69 are connected to the top plate 50e of the housing body 50. The lower ends of the eighth partition plate 68 and the ninth partition plate 69 reach the panel 51.

The housing body 50 is formed with a seventh space R7 partitioned by the eighth partition plate 68 and the ninth partition plate 69. The seventh space R7 is a space partitioned in a quadrangular shape in a plan view from the upper end to the lower end of the housing body 50. A heat insulating material 77 is provided on the inner surface or the outer surface of the seventh space R7. The heat insulating material 77 suppresses the transfer of heat to and from the adjacent second space R2.

The configuration for dividing the internal space of the housing body 50 is not limited to this embodiment, and can be changed as appropriate.

As shown in FIGS. 3 and 4, the introduction connecting pipe 52 is provided at a position corresponding to the first space R1 and the fourth space R4 on the rear plate 50b of the housing body 50. The intake 55 of the introduction connection pipe 52 communicates with the first space R1 and the fourth space R4. The first space R1 forms a part of the first air passage P1 (see FIG. 1) and the second air passage P2 through which the air taken in from the intake 55 flows. The fourth space R4 forms a fourth air passage P4 (see FIG. 1) through which air taken in from the intake 55 flows. The second space R2 communicates with the first space R1 via the heater case 41f of the moisture absorbing rotor 41 described later, and forms the first air passage P1 together with the first space R1.

An air filter 73 for removing dust and the like from the air taken into the housing body 50 from the intake 55 is provided on the inner surface of the rear plate 50b of the housing body 50. The air filter 73 is attached to a mounting frame 74 provided on the rear plate 50b. As shown in FIG. 3, the first space R1 is provided with a damper device 75 that can switch between a form that allows the passage of air taken in from the intake port 55 and a form that blocks the passage of air. The damper device 75 has a door 75a that opens and closes the first and second air passages P1 and P2 by rotating.

The discharge connection pipe 53 is provided at a position corresponding to the sixth space R6 on the rear plate 50b of the housing body 50. The discharge port 56 of the discharge connection pipe 53 communicates with the sixth space R6. The sixth space R6 communicates with the first space R1 via the suction member 41a of the moisture absorbing rotor 41 described later, and forms the second air passage P2 together with the first space R1.

As shown in FIGS. 4 and 5, the air outlet 54 formed in the panel 51 is formed at a position corresponding to the fifth space R5. As shown in FIGS. 3 and 4, the inflow port 72 formed in the panel 51 is formed at a position corresponding to the seventh space R7. The seventh space R7 forms the third air passage P3 (see FIG. 1).

FIG. 6 is a schematic cross-sectional view taken along the line CC of FIG. FIG. 7 is a view taken along the arrow D of FIG. As shown in FIGS. 3, 4, and 6, an opening 68a is formed in the eighth partition plate 68 forming the seventh space R7. The opening 68a communicates with the seventh space R7 and the sixth space R6. The opening 68a constitutes a merging port for merging the third air passage P3 with the second air passage P2. As shown in FIG. 7, the opening 68a of the present embodiment is composed of a plurality of slits elongated in the vertical direction Z. The plurality of slits are arranged in the left-right direction X. The area of the opening 68a is smaller than the area of the inflow port 72.

A temperature / humidity sensor 45 is arranged in the seventh space R7. The temperature / humidity sensor 45 detects the temperature and humidity of the air flowing through the opening 68a from the inflow port 72. As shown in FIG. 6, the temperature / humidity sensor 45 is arranged in the seventh space R7 so as to face the opening 68a. Therefore, the temperature and humidity of the air passing through the opening 68a can be appropriately detected.

As shown in FIG. 7, the eighth partition plate 68 is provided with an adjusting plate 68b for adjusting the area of the opening 68a. The adjusting plate 68b of the present embodiment is attached so as to be movable in the vertical direction with respect to the eighth partition plate 68. By moving the adjusting plate 68b in the vertical direction, the length of the adjusting plate 68b overlapping the opening 68a can be changed, and the area of the opening 68a communicating the seventh space R7 and the sixth space R6 can be adjusted. By adjusting the area of the opening 68a, the air volume of the air flow flowing into the seventh space R7 can be adjusted. The adjusting plate 68b may be moved manually or automatically by an actuator such as a motor or a solenoid. The adjusting plate 68b may be provided so as to be movable in the left-right direction.

<Configuration of control device 46>
As shown in FIGS. 3 and 4, the control device 46 is arranged in the third space R3 and the fourth space R4. The control device 46 includes a first control board 81 and a second control board 82. The first control board 81 and the second control board 82 are arranged side by side in the left-right direction X. The first control board 81 controls the operation of the first fan 43. The second control board 82 controls the operations of the second fan 44 and the heater 42. A microcomputer having a CPU, a memory, and the like, and an inverter (power supply circuit) having a rectifier circuit, an inverter circuit, and the like are mounted on the first and second control boards 81 and 82.

A heat generating component such as a switching element included in the inverter is mounted on the second control board 82. As shown in FIG. 4, a heat sink (cooler) 84 for cooling the heat generating component is attached to the second control board 82. The heat sink 84 is made of a block made of an aluminum alloy or the like, and a large number of fins are formed on the surface thereof. The heat sink 84 is located near the front side of the introduction connection pipe 52. In the fourth space R4 where the control device 46 is arranged, a partition wall 85 for partitioning a region (cooling space) R4a in which the heat sink 84 is arranged and the other regions is arranged along the front-rear direction Y. The cooling space R4a forms a fourth air passage P4 (see FIG. 1).

FIG. 8 is a schematic cross-sectional view taken along the line EE of FIG.
As shown in FIGS. 4 and 8, the mounting frame 74 to which the air filter 73 is mounted has a shielding plate 74a that shields the flow of air below the first partition plate 61. The shielding plate 74a is formed with an inflow port 74b that allows air taken in from the intake port 55 to flow into the cooling space R4a.

An opening 66a is formed in the sixth partition plate 66. The opening 66a communicates the cooling space R4a with the sixth space R6. Since the sixth space R6 forms the second air passage P2, the opening 66a constitutes a merging port for merging the fourth air passage P4 with the second air passage P2. Therefore, the air taken in from the intake port 55 flows through the cooling space R4a from the inflow port 74b, and is discharged from the opening 66a to the sixth space R6. Air flowing through the cooling space R4a is supplied to the heat sink 84 arranged in the cooling space R4a, and the heat generating component mounted on the second control board 82 is cooled.

FIG. 9 is a view taken along the line F of FIG.
The sixth partition plate 66 is provided with an adjusting plate 66b for adjusting the area of the opening 66a. The adjusting plate 66b of the present embodiment is attached so as to be movable in the left-right direction with respect to the sixth partition plate 66. By moving the adjusting plate 66b in the left-right direction, the length of the adjusting plate 66b overlapping the opening 66a can be changed, and the area of the opening 66a communicating the cooling space R4a and the sixth space R6 can be adjusted. By adjusting the area of the opening 66a, the air volume of the air flowing into the fourth space R4 can be adjusted. The adjustment plate 66b may be moved manually or automatically by an actuator such as a motor or a solenoid. The adjusting plate 66b may be provided so as to be movable in the vertical direction.

<Structure of 1st fan 43>
As shown in FIG. 5, in the fifth space R5, the first fan 43 is provided below the first partition plate 61. The first fan 43 includes a fan main body 43a having a plurality of blades, a fan case 43b for accommodating the fan main body 43a, and a fan motor 43c for rotating the fan main body 43a. The first fan 43 of the present embodiment is, for example, a centrifugal fan.

The first partition plate 61 is formed with a suction port 61a for sucking air into the fan case 43b by rotating the fan body 43a. At the lower end of the fan case 43b, a discharge port 43d for discharging air to the outside of the fan case 43b by rotation of the fan body 43a is formed. The discharge port 43d is connected to the air outlet 54 of the panel 51 and communicates with the air outlet 54. The first fan 43 creates an air flow in the first air passage P1.

As shown in FIG. 4, the fan case 43b of the first fan 43 is provided with a temperature sensor 60 and a temperature fuse (temperature detector) 76. The temperature sensor 60 detects the temperature of the air blown out from the discharge port 43d. The thermal fuse 76 has an electric wire that breaks when the ambient air temperature exceeds a predetermined temperature, and is incorporated in a circuit that transmits a signal to the control device 46. The detected value of the temperature sensor 60 and the disconnection state of the temperature fuse 76 are input to the control device 46.

<Structure of 2nd fan 44>
As shown in FIGS. 3 to 5, a second fan 44 is provided in the sixth space R6. The second fan 44 has a fan main body 44a having a plurality of blades, a fan case 44b for accommodating the fan main body 43a, and a fan motor 43c for rotating the fan main body 43a. A suction port 44d for sucking air into the fan case 44b by rotation of the fan body 44a is formed on the lower surface of the fan case 44b. At the rear end of the fan case 44b, a discharge port 44e for discharging air to the outside of the fan case 44b by rotation of the fan body 44a is formed. The discharge port 44e is connected to the discharge connection pipe 53. The second fan 44 creates an air flow in the second air passage P2. The second fan 44 of the present embodiment is a sirocco fan. The second fan 44 produces an air flow with a larger air volume than the first fan 43.

<Structure of Moisture Absorption Rotor 41>
As shown in FIGS. 3 to 5, the moisture absorbing rotor (moisture absorbing device) 41 is provided on the first partition plate 61. As shown in FIG. 3, the moisture absorbing rotor 41 is arranged below the inclined plate portion 63b and the vertical plate portion 63a of the third partition plate 63 in a plan view. The moisture absorbing rotor 41 is arranged so as to straddle the first space R1 and the second space R2. As shown in FIG. 4, the moisture absorbing rotor 41 is arranged in the sixth space R6 in the bottom view.

FIG. 10 is a plan view of the moisture absorbing rotor 41. FIG. 11 is an exploded perspective view of the moisture absorbing rotor 41. The moisture absorbing rotor 41 includes a suction member 41a, a ring gear 41b, a pinion gear 41c, a support frame 41d, and a heater case 41f. Note that FIG. 11 shows a state in which the suction member 41a and the ring gear 41b are separated upward from the support frame 41d.

The suction member 41a is a desiccant material formed in an annular shape. The adsorption member 41a adsorbs moisture from the air passing through itself when its temperature is low. When the temperature of the adsorption member 41a is high, the adsorption member 41a releases the moisture adsorbed by itself into the air passing through the adsorption member 41a to humidify the air.

The ring gear 41b is an external gear. The ring gear 41b is attached to the outer periphery of the suction member 41a. The suction member 41a and the ring gear 41b are integrated. The suction member 41a and the ring gear 41b are arranged on the support frame 41d. The suction member 41a and the ring gear 41b are rotatably supported by the support frame 41d at the center O of the suction member 41a.

The support frame 41d is integrally formed with the first partition plate 61 of the housing body 50, or is fixed to the first partition plate 61. The support frame 41d is formed with substantially fan-shaped through holes 41d1 and 41d2. The through hole 41d1 is formed at a position corresponding to the first region A1 (see FIG. 3) described later. The through holes 41d2 are formed at positions corresponding to the second and third regions A2 and A3, which will be described later. Through holes may be formed at three locations corresponding to each of the first region A1 to the third region A3.

The pinion gear 41c is rotatably supported with respect to the support frame 41d on the outer peripheral side of the ring gear 41b. The pinion gear 41c meshes with the ring gear 41b. The pinion gear 41c is rotated by a motor (not shown). When the pinion gear 41c rotates, the suction member 41a rotates around the center O together with the ring gear 41b. In the present embodiment, the suction member 41a rotates in one side in the circumferential direction (the direction indicated by the white arrow B in FIG. 3).

As shown in FIGS. 4, 5, and 11, a heater case 41f is provided on the support frame 41d of the moisture absorbing rotor 41. The heater case 41f is formed in a substantially arc shape in a plan view, and is arranged at a position corresponding to the through hole 41d2 of the support frame 41d. The heater case 41f is formed in a box shape with an open upper end. As shown in FIG. 5, the heater case 41f is arranged below the suction member 41a in the sixth space R6. The heater case 41f is arranged in a range (an angle range of 240 °) of the second region A2 and the third region A3, which will be described later, in the plan view of FIG. The heater case 41f functions as a passage member that forms a passage for air passing through the suction member 41a. The heater case 41f forms a part of the first air passage P1 between the first space R1 and the second space R2.

The heater 42 is housed in the heater case 41f. As shown in FIG. 3, the heater 42 is located below the inclined plate portion 63b. The heater 42 is arranged at a position corresponding to the second region A2 and the third region A3. As shown in FIG. 11, inside the heater case 41f, the upstream side in the air flow direction in the first air passage P1 from the heater 42 constitutes the heater front space 41f1. The heater front space 41f1 is arranged in the third region A3 (see FIGS. 3 and 4). Air before being heated by the heater 42 is introduced into the heater front space 41f1.

Inside the heater case 41f, a space 41f2 after the heater is formed on the downstream side in the air flow direction in the first air passage P1 from the heater 42. The post-heater space 41f2 is arranged in the second region A2 (see FIGS. 3 and 4). Air after being heated by the heater 42 is introduced into the space 41f2 after the heater.

FIG. 12 is a perspective view of the heater 42. The heater 42 has a rectangular cross section formed of, for example, metal. The heater 42 has a grid-like frame 42a in order to increase the contact area with the air passing through the heater 42. One open end of the heater 42 is an air inlet 42b and the other open end of the heater 42 is an air outlet 42c.

The heater 42 is arranged so that the inlet 42b faces the space 41f1 in front of the heater and the outlet 42c faces the space 41f2 after the heater. The air in the heater front space 41f1 is introduced into the heated heater 42 from the inlet 42b, and when it passes through the inside of the heater 42, it comes into contact with the frame body 42a or the like and is warmed. The warmed air moves from the outlet 42c of the heater 42 to the post-heater space 41f2 and warms the suction member 41a located above the post-heater space 41f2 (see FIG. 3). Therefore, the heater 42 indirectly warms the suction member 41a.

The heater 42 may directly heat the adsorption member 41a instead of heating the air. In that case, for example, the heater 42 may be arranged above the suction member 41a, and the suction member 41a may be warmed by the radiant heat of the heater 42.

As shown in FIG. 3, the adsorption member 41a has a first region (moisture absorbing region) A1, a second region (moisture releasing region) A2, and a third region A3 in a plan view. The first region A1, the second region A2, and the third region A3 are set around the center O of the suction member 41a in an angle range of 120 °, respectively. The first region A1 is adjacent to the second region A2 and the third region A3. The second region A2 is adjacent to the first region A1 and the third region A3. The third region A3 is adjacent to the first region A1 and the second region A2.

The first region A1 to the third region A3 are regions fixed at a fixed position. Therefore, when the suction member 41a rotates in the direction of the arrow B, the first region A1 to the third region A3 move relatively on the suction member 41a.

The first region A1 is set in an angle range of 120 ° from the vertical plate portion 63a of the third partition plate 63 in the direction opposite to the arrow B. As a result, the first region A1 is interposed between the first space R1 and the sixth space R6.

When outdoor cold air is introduced into the first space R1 from the intake 55, a part of the air passes through the first region A1 of the adsorption member 41a and flows to the sixth space R6. The first region A1 of the suction member 41a is cooled by air to lower the temperature. Therefore, the first region A1 of the adsorption member 41a adsorbs the moisture in the air passing through the adsorption member 41a. When the suction member 41a rotates after the first region A1 of the suction member 41a has adsorbed the moisture in the air, the portion that was the first region A1 becomes the second region A2.

The second region A2 is formed in an angle range of 120 ° from the vertical plate portion 63a of the third partition plate 63 to the inclined plate portion 63b in the direction of arrow B. The second region A2 is interposed between the second space R2 and the post-heater space 41f2 of the heater case 41f. The air warmed by the heater 42 in the heater case 41f moves from the post-heater space 41f2 to the second space R2 through the second region A2 of the suction member 41a. At that time, since the second region A2 of the adsorption member 41a is heated by the air and the temperature rises, moisture is released to the air passing through the second region A2 to humidify the air.

The third region A3 is formed in an angle range of 120 ° in the direction of arrow B from the inclined plate portion 63b of the third partition plate 63. The third region A3 is interposed between the first space R1 and the space in front of the heater 41f1 of the heater case 41f. When outdoor cold air is introduced into the first space R1 from the intake 55, a part of the air passes through the third region A3 of the adsorption member 41a and moves to the heater front space 41f1. At that time, the third region A3 of the adsorption member 41a is preliminarily cooled by cold air. The cold air is preliminarily warmed by the third region A3 of the adsorption member 41a. The suction member 41a does not necessarily have to have the third region A3.

As described above, the moisture absorbing rotor 41 rotates the single suction member 41a to adsorb the moisture in the air flowing through the first air passage P1 in the first region A1 and to adsorb the moisture in the air flowing through the first air passage P1 and the second region A2. 2 It is possible to humidify the air flowing through the air passage P2, and the humidification unit 3 can be compactly configured.

<Summary of air passages>
As shown in FIGS. 3 and 4, when the second fan 44 is operated, outdoor air is introduced into the first space R1 of the housing body 50 from the intake 55 of the introduction connection pipe 52. The air introduced into the first space R1 passes through the first region A1 of the suction member 41a, moves to the sixth space R6, and is discharged to the outside from the discharge port 56 of the discharge connection pipe 53.

Therefore, in the present embodiment, the inner space of the introduction connecting pipe 52, the first space R1, the sixth space R6, and the inner space of the discharge connecting pipe 53 are the second air passage through which air flows from the intake 55 to the discharge port 56. It constitutes P2. The first region A1 and the second fan 44 of the suction member 41a are arranged in the middle of the second air passage P2. The suction member 41a of the moisture absorption rotor 41 adsorbs the moisture in the air flowing through the second air passage P2 in the first region A1.

When the second fan 44 is operated, the air in the target space S1 flows into the seventh space R7 from the inflow port 72 formed in the panel 51. The air introduced into the seventh space R7 flows in the vicinity of the temperature / humidity sensor 45, passes through the opening 68a, flows into the sixth space R6, and is discharged to the outside from the discharge port 56 of the discharge connection pipe 53. Therefore, in the present embodiment, the seventh space R7 constitutes the third air passage P3.

The third air passage P3 joins the second air passage P2 at the opening 68a and is discharged to the outside. The air flowing through the third air passage P3 is used only for detecting the temperature and humidity of the target space S1 and is discharged to the outside without passing through the moisture absorbing rotor 41, so that it contributes completely to the humidification of the target space S1. Not done. Therefore, the air volume of the air flowing through the third air passage P3 is set to be smaller than the air volume of the air flowing through the second air passage P2 and the first air passage P1. In the present embodiment, the area of the opening 68a is made as small as possible to set the air volume of the air flowing through the third air passage P3 to be small, and the decrease in the humidification efficiency of the target space S1 is suppressed.

The third air passage P3 joins the second air passage P2 on the downstream side of the suction member 41a in the second air passage P2. Assuming that the third air passage P3 joins the second air passage P2 on the upstream side of the suction member 41a, the warm air in the target space S1 passes through the first region A1 of the suction member 41a, and the suction member 41a There is a risk that the adsorption of water to the water will be hindered. In the present embodiment, since the third air passage P3 joins the second air passage P2 on the downstream side of the suction member 41a, the suction member 41a can efficiently adsorb water.

When the second fan 44 is operated, the air flowing in from the intake port 55 flows into the cooling space R4a in the fourth space R4 from the inflow port 74b formed in the mounting frame 74 of the air filter 73. The air that has flowed into the cooling space R4a passes through the opening 66a formed in the sixth partition plate 66 after cooling the heat generating parts of the control device 46, flows into the sixth space R6, and is discharged to the outside from the discharge port 56. Will be done. Therefore, in the present embodiment, the cooling space R4a of the fourth space R4 constitutes the fourth air passage P4.

The fourth air passage P4 joins the second air passage P2 on the downstream side of the suction member 41a in the second air passage P2. Therefore, the path of the air discharged from the fourth air passage P4 through the second air passage P2 to the outside is a path that does not pass through the first region A1 of the adsorption member 41a. Assuming that the fourth air passage P4 joins the second air passage P2 on the upstream side of the suction member 41a, the warm air after cooling the heat-generating component passes through the first region A1 of the suction member 41a. Adsorption of water to the adsorption member 41a may be hindered. In the present embodiment, the fourth air passage P4 joins the second air passage P2 on the downstream side of the suction member 41a, and warm air after cooling the heat generating component may flow through the first region A1 of the suction member 41a. Therefore, the adsorption member 41a can efficiently adsorb water.

When the first fan 43 is operated during the humidification operation, outdoor air is introduced into the first space R1 from the intake 55 of the introduction connection pipe 52, passes through the third region A3 of the suction member 41a, and passes through the third region A3 of the suction member 41a to the heater case 41f. It moves to the space 41f1 in front of the heater. The air that has moved to the heater front space 41f1 is heated by the heater 42 in the heater case 41f, moves to the heater rear space 41f2, passes through the second region A2 of the suction member 41a, and moves to the second space R2. The air that has moved to the second space R2 is blown out from the outlet 54 of the panel 51 to the target space S1 by the first fan 43.

Therefore, in the present embodiment, the inner space of the introduction connecting pipe 52, the first space R1, the space in front of the heater 41f1, the space after the heater 41f2, and the second space R2 are the first spaces in which air flows from the intake 55 to the outlet 54. It constitutes the air passage P1. A third region A3 and a second region A2, a heater 42, and a first fan 43 of the suction member 41a are arranged in the middle of the first air passage P1.

In the first air passage P1, the suction member 41a is preliminarily cooled by passing the air before being heated by the heater 42 through the third region A3 of the suction member 41a. The adsorption member 41a releases moisture into the air when the air warmed by the heater 42 passes through the second region A2 of the adsorption member 41a. As a result, the air passing through the second region A2 of the adsorption member 41a is humidified.

During the humidification operation, the air flowing through the first air passage P1 and the air flowing through the second air passage P2 both pass through the first space R1 which is the same space. However, the partition plate for distributing the air flowing through the first air passage P1 and the second air passage P2 is not provided in the first space R1. Since the second fan 44 is driven by an air volume larger than that of the first fan 43, a difference in air suction force occurs between the second fan 44 and the first fan 43, and the difference in the suction force causes the first This is because air is distributed to the air passage P1 and the second air passage P2. Since the air flowing through the first air passage P1 and the air flowing through the second air passage P2 both pass through the first space R1 which is the same space, the structure inside the housing body 50 can be simplified.

When the first fan 43 and the second fan 44 are operated during the ventilation operation, the outdoor air flows through the first air passage P1 and the second air passage P2 as in the humidification operation. However, since the moisture absorbing rotor 41 and the heater 42 are not driven, the air flowing through the first air passage P1 is discharged from the outlet 54 of the panel 51 to the target space S1 without being humidified by the suction member 41a of the moisture absorbing rotor 41. NS. The reason why not only the first fan 43 but also the second fan 44 is driven during the ventilation operation is that the first fan 43 generates a smaller amount of air flow than the second fan 44, so simply driving the first fan 43 is not enough. This is because it may be difficult to draw in outdoor air through the introduction duct 48.

<Specific configuration of control device 46>
FIG. 13 is a block diagram schematically showing the control device 46 of the humidification unit 3.
The first control board 81 of the control device 46 includes a first control circuit 81A that controls the operation of the first fan 43. The second control board 82 includes a second control circuit 82A that controls the operation of the second fan 44 and the heater 42.

The first control circuit 81A includes a first microcomputer (first control unit) 81A1 (hereinafter, also referred to as a “first microcomputer”) and a first inverter (power supply circuit) 81A2. The first control circuit 81A adjusts the operating frequency (rotation speed) of the fan motor 43c of the first fan 43 by controlling the opening and closing of the switching element included in the first inverter 81A2 by the first microcomputer 81A1. In the first microcomputer 81A1, the rotation speed of the first fan 43 is input from a rotation detection sensor (not shown), and the rotation speed of the first fan 43 becomes a predetermined target rotation speed (set rotation speed). Feedback control. As a result, the first fan 43 generates an air flow having a predetermined air volume.

The second control circuit 82A includes a second microcomputer (second control unit) 82A1 (hereinafter, also referred to as a “second microcomputer”) and a second inverter (power supply circuit) 82A2. The second control circuit 82A adjusts the operating frequency (rotation speed) of the fan motor 44c of the second fan 44 by controlling the opening and closing of the switching element included in the second inverter 82A2 by the second microcomputer 82A1. The second control circuit 82A adjusts the output of the heater 42 by controlling the opening and closing of the switching element included in the second inverter 82A2 by the second microcomputer 82A1.

In the second microcomputer 82A1, the rotation speed of the second fan 44 is input from a rotation detection sensor (not shown), and the rotation speed of the second fan 44 becomes a predetermined target rotation speed (set rotation speed). Feedback control. As a result, the second fan 44 generates an air flow having a predetermined air volume.

The air volume by the first fan 43 and the air volume by the second fan 44 are set, for example, in a ratio of 1: 5. However, the ratio of the air volume by the first fan 43 to the air volume by the second fan 44 is not limited to this, and can be changed as appropriate.

As shown in FIG. 1, when the introduction duct 48 connected to the introduction connection pipe 52 is long, the operating frequencies of the first fan 43 and the second fan 44 are increased in order to draw outdoor air into the housing 47. There is a need. Therefore, the first fan 43 and the second fan 44 are operated at appropriate operating frequencies by the first control circuit 81A and the second control circuit 82A of the control device 46, respectively.

When the operating frequency of the second fan 44 is increased, the air volume of the air flowing through the seventh space R7 and the air volume of the air flowing through the fourth space R4 also increase. The air flowing through the seventh space R7 is used only for detecting the temperature and humidity of the target space S1, and the air flowing through the fourth space R4 is used only for cooling the heat generating parts, both of which are for humidifying the air. As the air volume increases, it becomes a loss for humidification. Therefore, in the present embodiment, the opening degree of the opening (merging port) 68a that communicates the 7th space R7 and the 6th space R6 and the opening (merging port) that communicates the 4th space R4 and the 6th space R6. By adjusting the opening degree of 66a with the adjusting plates 68b and 66b, respectively, even if the operating frequency of the second fan 44 is increased, the increase in the air volume of the air flowing through the seventh space R7 and the fourth space R4 is suppressed. be able to.

The second inverter 82A2 of the second control circuit 82A is connected to the commercial power supply 80 by the power supply line 86. The first inverter 81A2 of the first control circuit 81A is connected to the power supply line 86 by the connecting line 87. The AC voltage of the commercial power supply 80 is converted into a predetermined AC voltage by the first and second inverters 81A2 and 82A2 of the first and second control circuits 81A and 82A, and the fan motor 43c of the first and second fans 43 and 44. , 44c and heater 42. A switch 83 is provided on the power supply line 86 between the commercial power supply 80 and the second inverter 82A2 of the second control circuit 82A. The switch 83 is composed of an electromagnetic relay having an electromagnetic coil and contacts. The opening and closing of the switch 83 is controlled by the second microcomputer 82A1 in the second control circuit 82A. The second microcomputer 82A1 excites the electromagnetic coil by passing an electric current through the electromagnetic coil of the switch 83, and closes the contacts. This makes it possible to energize the second inverter 82A2 from the power supply 80.

The first microcomputer 81A1 and the second microcomputer 82A1 are connected by a signal transmission circuit 88. The signal transmission circuit 88 is provided with a switch 89. The switch 89 is composed of an electromagnetic relay having an electromagnetic coil and contacts. The first microcomputer 81A1 is connected to an electromagnetic coil, and the second microcomputer 82A1 is connected to a contact. The opening and closing of the switch 89 is controlled by the first microcomputer 81A1 in the first control circuit 81A. Specifically, the first microcomputer 81A1 excites the electromagnetic coil by passing a current (signal) through the switch 89, and opens or closes the contacts. The second microcomputer 82A1 connected to the contact recognizes the open / closed state of the contact. The second microcomputer 82A1 controls the opening / closing of the switch 83 according to the opening / closing state of the contacts.

<Heater operation control>
When the first fan 43 is stopped or the rotation speed of the first fan 43 is lower than a predetermined value during the humidification operation, the air warmed by the heater 42 contains the moisture contained in the moisture release region A2 of the adsorption member 41a. Is not properly released, so that the temperature of the air does not drop and there is a possibility that the surrounding parts will be damaged by heat. Therefore, the control device 46 of the present embodiment limits the operation of the heater 42 when the rotation speed of the first fan 43 is equal to or less than a predetermined first threshold value.

Specifically, the first microcomputer 81A1 of the first control circuit 81A constantly monitors the rotation speed of the first fan 43. When the rotation speed exceeds a predetermined first threshold value, the first microcomputer 81A1 sends a signal to the switch 89 of the signal transmission circuit 88 (excites the electromagnetic coil) and closes the switch 89. When the second microcomputer 82A1 recognizes the closed state of the switch 89, the second microcomputer 82A1 closes the switch 83. Therefore, the electric power from the power source 80 can be supplied to the heater 42 via the second inverter 82A2 of the second control circuit 82A to operate the heater 42.

On the contrary, when the rotation speed of the first fan 43 is equal to or less than the first threshold value, the first microcomputer 81A1 stops transmitting the signal to the switch 89 of the signal transmission circuit 88 and opens the switch 89. When the second microcomputer 82A1 recognizes the open state of the switch 89, the second microcomputer 82A1 opens the switch 83. Therefore, the energization from the power supply 80 to the second inverter 82A2 is cut off, and the heater 42 cannot be operated. Therefore, the heater 42 is stopped. At the same time, the second fan 44 is also stopped.

The second microcomputer 82A1 transmits a signal for stopping the heater 42 to the second inverter 82A2 at the same time as the operation of opening the switch 83. Therefore, the second microcomputer 82A1 operates so as to stop the heater 42 in hardware by cutting off the energization of the second inverter 82A2 and also in software to stop the heater 42 by the stop signal to the second inverter 82A2. do. The heater 42 can be reliably stopped by such double control.

The first threshold is rotation to such an extent that even if the heater 42 is activated, the temperature of the warmed air drops through the moisture-releasing region A2 of the adsorption member 41a and the heat of the air does not damage the surrounding parts. Set to number. The first threshold value is set to a rotation speed lower than the target rotation speed of the normal first fan 43 during the humidification operation.

The first microcomputer 81A1 of the first control circuit 81A transmits the rotation speed of the first fan 43 to the second microcomputer 82A1 of the second control circuit 82A. Therefore, the second microcomputer 82A1 can grasp not only the rotation speed of the second fan 44 but also the rotation speed of the first fan 43. During the humidification operation, the second microcomputer 82A1 controls the second inverter 82A2 to operate the heater 42 until the rotation speed of the first fan 43 and the rotation speed of the second fan 44 reach the target rotation speeds, respectively. It is stopped, and when the target rotation speed is reached, the heater 42 is operated.

The second microcomputer 82A1 stops the heater 42 when the rotation speed of the second fan 44 exceeds a predetermined second threshold value. This second threshold value is set with reference to the rotation speed of the first fan 43. For example, the second threshold value is set to a value obtained by adding a predetermined rotation speed to the actual rotation speed of the first fan 43. As described above, the air volume of the air flow generated by the first fan 43 is set to be smaller than the air volume of the air flow generated by the second fan 44 at a predetermined ratio. However, when the air volume of the air flow by the second fan 44 becomes relatively larger than the air volume of the air flow by the first fan 43, more air flows through the second air passage P2, and the air flowing through the first air passage P1. Is reduced. When such a phenomenon occurs, even if the rotation speed of the first fan 43 reaches the target rotation speed, the air volume of the air flow to the heater 42 decreases, and the heat of the air can damage the surrounding parts. There is sex.

Therefore, in the present embodiment, the second microcomputer 82A1 sets a second threshold value based on the rotation speed of the first fan 43, and when the rotation speed of the second fan 44 exceeds the second threshold value, the second inverter A stop signal is transmitted to 82A2 to stop the heater 42. As a result, it is possible to prevent the surrounding parts from being damaged by the heat of the air heated by the heater 42.

From the above, the second microcomputer 82A1 controls to stop the heater 42 until the rotation speed of the second fan 44 reaches the target rotation speed or when the rotation speed of the second fan 44 exceeds the second threshold value. conduct.

The disconnection state of the thermal fuse 76 is input to the first microcomputer 81A1 of the first control circuit 81A. In the first microcomputer 81A1, a signal indicating that the temperature fuse 76 is broken or not broken is transmitted from the electric circuit in which the temperature fuse 76 is incorporated. The first microcomputer 81A1 closes the switch 89 of the signal transmission circuit 88 on the condition that the rotation speed of the first fan 43 exceeds the first threshold value while recognizing that the thermal fuse 76 is not broken. .. The second microcomputer 82A1 recognizes that the switch 89 is closed and closes the switch 83 to enable the power supply 80 to energize the second inverter 82A2. When the temperature around the thermal fuse 76 exceeds a predetermined temperature and the thermal fuse 76 is disconnected, the first microcomputer 81A1 recognizes the disconnection of the thermal fuse 76 by the signal, and the rotation speed of the first fan 43 sets the first threshold value. Even if it exceeds, the switch 89 is opened. The second microcomputer 82A1 recognizes that the switch 89 has been opened, and opens the switch 83 to cut off the energization from the power supply 80 to the second inverter 82A2. As a result, the heater 42 is stopped, and it is possible to prevent the temperature of the air blown out from the outlet 54 from rising excessively.

<Modification example of control device 46>
FIG. 14 is a block diagram schematically showing a modified example of the control device 46 of the humidifying unit 3.
In this modification, the switch 83 provided between the commercial power supply 80 and the second inverter 82A2 of the second control circuit 82A is controlled to open and close by the first microcomputer 81A1 in the first control circuit 81A. Specifically, the first microcomputer 81A1 of the first control circuit 81A closes the switch 83 when the rotation speed of the first fan 43 exceeds a predetermined first threshold value. Therefore, the electric power from the power source 80 is supplied to the heater 42 via the second inverter 82A2 of the second control circuit 82A, and the heater 42 becomes operable.

On the contrary, when the rotation speed of the first fan 43 is equal to or less than the first threshold value, the first microcomputer 81A1 opens the switch 83. Therefore, the energization from the power supply 80 to the second inverter 82A2 is cut off, and the heater 42 cannot be operated. Therefore, the heater 42 is stopped regardless of the control of the second inverter 82A2 by the second microcomputer 82A1 of the second control circuit 82A. At the same time, the second fan 44 is also stopped.

In this modification, the first microcomputer 81A1 hardware stops the heater 42 by cutting off the power supply to the heater 42 by the switch 83 based on the rotation speed of the first fan 43. The second microcomputer 82A1 softly stops the heater 42 under the control of the second inverter 82A2 based on the rotation speed of the second fan 44. Therefore, both the first microcomputer 81A1 and the second microcomputer 82A1 perform double control for stopping the heater 42. Therefore, even if one of the microcomputers does not operate normally, the heater 42 can be stopped by the other microcomputer.

In this modification, as in the above embodiment, when the thermal fuse 76 is disconnected, the disconnected state of the thermal fuse 76 is input to the first microcomputer 81A1 of the first control circuit 81A, and the temperature of the first microcomputer 81A1 is increased. The switch 83 is opened by recognizing the disconnection of the fuse 76. Therefore, the energization from the power supply 80 to the second inverter 82A2 is cut off, and the heater 42 is stopped. As a result, it is possible to prevent the temperature of the air blown out from the outlet 54 from rising excessively.

<Other embodiments>
The fourth air passage P4 for cooling the heat sink 84 may be merged with the first air passage P1 instead of the second air passage P2, and may be blown out from the air outlet 54 into the target space S1. In this case, the fourth air passage P4 can join the heater 42 in the first air passage P1 on the upstream side in the air flow direction.

The third air passage P3 for detecting the temperature and humidity of the target space S1 may join the first fan 43 in the first air passage P1 on the upstream side. Specifically, the third air passage P3 may join the suction member 41a in the first air passage P1 on the upstream side or the downstream side. The third air passage P3 can also join the suction member 41a in the second air passage P2 on the upstream side.

In the above embodiment, the first air passage P1 and the second air passage P2 are formed by the common first space R1 in the housing body 50, but may be formed by different spaces. In this case, air may be taken into the first air passage P1 and the second air passage P2 from individual intakes.

In the moisture absorbing rotor 41 of the above embodiment, the suction member 41a is rotated by a gear mechanism including a ring gear 41b and a pinion gear 41c, but the suction member 41a may be rotated by another rotation transmission mechanism using a belt, a chain or the like. good.

In the above embodiment, the temperature / humidity sensor 45 is provided in the seventh space R7, but a humidity sensor that detects only the humidity may be provided. The temperature sensor and the humidity sensor may be provided separately.

In the above embodiment, when the rotation speed of the second fan 44 exceeds the second threshold value, the second microcomputer 82A1 of the second control circuit 82A stops the heater 42. In the above modification, instead of this, when the rotation speed of the second fan 44 exceeds the second threshold value, the first microcomputer 81A1 of the first control circuit 81A opens the switch 83 to stop the heater 42. You may. In this case, the second microcomputer 82A1 transmits the rotation speed of the second fan 44 to the first microcomputer 81A1, and the first microcomputer 81A1 determines whether or not the heater 42 needs to be stopped based on the rotation speed of the second fan 44. May be good. Alternatively, the second microcomputer 82A1 determines whether or not the heater 42 needs to be stopped based on the rotation speed of the second fan 44, transmits the determination result to the first microcomputer 81A1, and the first microcomputer 81A1 is based on the determination result. The heater 42 may be stopped.

<Action and effect of the embodiment>
(1) The humidifying unit 3 of the above embodiment includes an adsorption member 41a having a moisture absorption region A1 for adsorbing moisture and a moisture release region A2 for releasing moisture, a heater 42 for heating the moisture release region A2 of the adsorption member 41a, and the like. Controls the first fan 43 that generates an air flow, the housing 47 that houses the suction member 41a, the heater 42, and the first fan 43, the first control circuit 81A that controls the first fan 43, and the heater 42. A second control circuit 82A is provided. The housing 47 has a first air passage P1 in which air taken in from the outside by the first fan 43 is blown out to the target space S1 via the moisture release region A2 of the adsorption member 41a. When the rotation speed of the first fan 43 is equal to or less than a predetermined first threshold value, the heater 42 is stopped. With such a configuration, when the first fan 43 is stopped or rotating at a speed lower than the first threshold value, the surrounding parts are not damaged by the heat of the heater 42, and the parts can be moved. Can be protected.

(2) The humidifying unit 3 of the above embodiment further includes a signal transmission circuit 88 that connects the first control circuit 81A and the second control circuit 82A, and when the rotation speed of the first fan 43 is equal to or less than the first threshold value. The first control circuit 81A transmits a predetermined signal to the signal transmission circuit 88, and the second control circuit 82A stops the heater 42 based on the signal. Therefore, the rotation speed of the first fan 43 can be easily grasped by the first control circuit 81A that controls the first fan 43, and based on the signal transmitted from the first control circuit 81A according to the rotation speed. The second control circuit 82A can stop the heater 42.

(3) In the above embodiment, the signal transmission circuit 88 has the switch 89, and the first control circuit 81A switches the switch 89 depending on whether or not the rotation speed of the first fan 43 is equal to or less than the first threshold value. The second control circuit 82A opens and closes, and the second control circuit 82A stops the heater 42 based on the open / closed state of the switch 89. As a result, the heater 42 can be stopped by the switch 89 according to the rotation speed of the first fan 43 according to the open / closed state.

(4) In the above embodiment, when the second control circuit 82A includes the second inverter 82A2 that supplies the electric power from the power source 80 to the heater 42 and the rotation speed of the first fan 43 is equal to or less than the first threshold value, the power source is supplied. The energization from 80 to the second inverter 82A2 is cut off. Therefore, when the rotation speed of the first fan 43 is equal to or less than the first threshold value, the heater 42 can be reliably stopped by making it impossible to supply electric power to the heater 42.

(5) In the above embodiment, the second control circuit 82A transmits an instruction signal for stopping the heater 42 to the second inverter 82A2 when the rotation speed of the first fan 43 is equal to or less than the first threshold value. , The process of cutting off the energization from the power supply 80 to the second inverter 82A2 is performed. Therefore, the second control circuit 82A reliably stops the heater 42 by performing both a process of controllingly stopping the heater 42 and a process of cutting off the energization from the power supply 80 to the second inverter 82A2. Can be done.

(6) In the above embodiment, the housing 47 is provided with an outlet 54 that blows out the air humidified in the moisture release region A2 to the target space S1, and is a thermal fuse that detects the temperature of the air blown out from the outlet 54. A temperature detector) 76 is further provided, and when the thermal fuse 76 detects a temperature equal to or higher than a predetermined temperature (disconnection due to the temperature), the heater 42 is stopped. If the air volume of the air by the first fan 43 is smaller than the predetermined value, the temperature at the outlet 54 may rise and damage the surrounding parts. Therefore, when the thermal fuse 76 detects a temperature equal to or higher than the predetermined temperature, the heater Peripheral parts can be protected by stopping 42.

(7) In the above embodiment, the humidification unit 3 includes a second fan 44 that generates an air flow having an air volume larger than the air flow generated by the first fan 43, and the housing 47 is provided by the second fan 44. A second air passage P2 in which air taken in from the outside is discharged to the outside via a moisture absorbing region A1 of the adsorption member 41a, and an intake 55 for taking in air into the first air passage P1 and the second air passage P2. The first air passage P1 and the second air passage P2 are formed by a common air passage between the intake port 55 and the suction member 41a, and have a relative air volume of the air flow generated by the first fan 43. When the air volume of the air flow generated by the second fan 44 is larger than a predetermined value, the heater 42 is stopped. When air is drawn from the intake 55 of the housing 47 to the suction member 41a in the first and second air passages P1 and P2 not only by the first fan 43 but also by the second fan 44, the second fan When the air volume of 44 increases relative to the first fan 43, it becomes difficult for air to flow to the heater 42 side by the first fan 43, and the temperature of the heater 42 may rise. Therefore, when the air volume of the air flow generated by the second fan 44 is larger than a predetermined value with respect to the air volume of the air flow generated by the first fan 43, the heater 42 is stopped to protect the peripheral parts. be able to.

(8) In the above embodiment, the heater 42 is stopped when the rotation speed of the second fan 44 is larger than the second threshold value set with reference to the rotation speed of the first fan 43. In this way, by comparing the air volume of the first fan 43 and the air volume of the second fan 44 with the rotation speeds of the respective fans 43 and 44, it is possible to easily control to stop the heater 42. can.

(9) The humidification unit 3 of the above embodiment includes a first control board 81 provided with a first control circuit 81A and a second control board 82 provided with a second control circuit 82A. The first control board 81 and the second control board 82 are arranged adjacent to each other. Therefore, it is possible to facilitate maintenance and inspection of the first control board 81 and the second control board 82.

The present disclosure is not limited to the above examples, and is shown by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

3: Humidification unit 41a: Adsorption member 42: Heater 43: First fan 44: Second fan 45: Temperature / humidity sensor 46: Control device 47: Housing 54: Outlet 55: Intake 76: Temperature fuse (temperature detector) )
80: Commercial power supply 81: First control board 81A: First control circuit 82: Second control board 82A: Second control circuit 82A2: Second inverter (power supply circuit)
83: Switch 88: Signal transmission circuit 89: Switch A1: First region (moisture absorption region)
A2: Second area (moisture release area)
P1: First air passage P2: Second air passage S1: Target space

Claims (10)

A humidifying unit that humidifies the target space (S1).
An adsorption member (41a) having a moisture absorbing region (A1) for adsorbing moisture and a moisture releasing region (A2) for releasing moisture, and an adsorption member (41a).
A heater (42) for heating the moisture release region (A2) of the adsorption member (41a), and a heater (42).
The first fan (43) that generates the air flow and
A housing (47) accommodating the suction member (41a), the heater (42), and the first fan (43).
The first control circuit (81A) that controls the first fan (43) and
A second control circuit (82A) for controlling the heater (42) is provided.
In the housing (47), air taken in from the outside by the first fan (43) is blown out to the target space (S1) via the moisture release region (A2) of the adsorption member (41a). Has a first air passage (P1)
A humidifying unit in which the heater (42) is stopped when the rotation speed of the first fan (43) is equal to or lower than a predetermined first threshold value. A signal transmission circuit (88) for connecting the first control circuit (81A) and the second control circuit (82A) is further provided.
When the rotation speed of the first fan (43) is equal to or lower than the first threshold value, the first control circuit (81A) transmits a predetermined signal to the signal transmission circuit (88), and the second control circuit (81A) The humidification unit according to claim 1, wherein the 82A) stops the heater (42) based on the signal. The signal transmission circuit (88) has a switch (89).
The first control circuit (81A) opens and closes the switch (89) according to whether or not the rotation speed of the first fan (43) is equal to or lower than the first threshold value, and the second control circuit (82A) opens and closes. ) Is the humidification unit according to claim 2, wherein the heater (42) is stopped based on the open / closed state of the switch (89). The second control circuit (82A) includes a power supply circuit (82A2) that supplies electric power from the power supply (80) to the heater (42).
Any one of claims 1 to 3, wherein when the rotation speed of the first fan (43) is equal to or lower than the first threshold value, the power supply (80) is cut off from the power supply circuit (82A2). Humidification unit described in. The second control circuit (82A) sends an instruction signal to the power supply circuit (82A2) to stop the heater (42) when the rotation speed of the first fan (43) is equal to or lower than the first threshold value. The humidifying unit according to claim 4, wherein the processing of transmitting and the processing of cutting off the energization from the power supply (80) to the power supply circuit (82A2) are performed. The housing (47) includes an outlet (54) that blows out air humidified in the moisture release region (A2) into the target space (S1).
A temperature detector (76) for detecting the temperature of the air blown out from the outlet (54) is further provided.
The humidification unit according to any one of claims 1 to 5, wherein when the temperature detector (76) detects a temperature equal to or higher than a predetermined temperature, the heater (42) is stopped. A second fan (44) that generates an air flow having an air volume larger than that generated by the first fan (43) is provided.
The housing (47) has a second air passage (P2) in which air taken in from the outside by the second fan (44) is discharged to the outside via a moisture absorption region (A1) of the adsorption member (41a). ), And an intake port (55) for taking in air into the first air passage (P1) and the second air passage (P2).
The first air passage (P1) and the second air passage (P2) are composed of a common air passage between the intake (55) and the suction member (41a).
The heater (42) is stopped when the air volume of the air flow generated by the second fan (44) is larger than a predetermined value with respect to the air volume of the air flow generated by the first fan (43). , The humidifying unit according to any one of claims 1 to 6. The heater (42) is stopped when the rotation speed of the second fan (44) is larger than the second threshold value set based on the rotation speed of the first fan (43). Humidification unit described. The first control board (81) provided with the first control circuit (81A) and
The humidification unit according to any one of claims 1 to 8, further comprising a second control board (82) provided with the second control circuit (82A). The humidification unit according to claim 9, wherein the first control board (81) and the second control board (82) are arranged adjacent to each other.

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