JP2015172472A - Ventilation device for air conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation device for air conditioning including at least one of a humidification function and a dehumidification function capable of acquiring required humidity control capacity while performing air amount control according to indoor carbon dioxide gas concentration.SOLUTION: A ventilation device for air conditioning includes: a carbon dioxide gas sensor 20 for detecting carbon dioxide gas concentration from indoor air; a control unit 14 for controlling an indoor ventilation air amount by controlling an air amount of a blower 2 for air supply and a blower 3 for air exhaustion at least according to information acquired from the carbon dioxide gas sensor 20; humidity control means for performing indoor humidity control; and priority mode setting means for setting at least one out of priority modes of humidity priority which prioritizes control of indoor humidity and ventilation priority which prioritizes control of the indoor ventilation air amount. The control unit 14, when the priority mode is set for the humidity priority by the priority mode setting means, changes a range for controlling the ventilation air amount.

Description

  The present invention relates to an air-conditioning ventilator having a humidity adjustment function for controlling the air volume in accordance with the concentration of indoor carbon dioxide gas.

  Conventionally, in order to reduce air-conditioning energy and to perform comfortable air-conditioning, supply air introduced into the room from the outside by an air supply fan, and exhaust gas discharged from the room to the outside by an exhaust fan There is an air-conditioning ventilator in which heat exchange is performed between the two and the intake air with a reduced temperature difference from the exhaust is led into the room.

  In an office building or the like where an air conditioning ventilator as described above is installed, the indoor carbon dioxide concentration is usually below a certain value when the indoor occupancy rate is 100%, that is, the degree of indoor contamination. Ventilation design is made so that is below a certain value. On the other hand, according to researches on literatures, the actual room occupancy rate is almost 50% to 70%. For this reason, the ventilation air volume that matches the occupancy rate of 50% to 70% is often set as a fixed value by a remote controller installed on a wall surface or the like. However, since the number of people in the room increases and decreases, the degree of dirt in the room increases as the number of people increases, and the degree of dirt in the room exceeds a certain value if the set ventilation airflow is insufficient. In addition, when there are a small number of people or no people at all, excessive ventilation is performed, which is not preferable for energy saving.

  Therefore, it is conceivable to control the ventilation operation by setting a timer with a remote controller. The setting contents of the timer are ON / OFF of operation and air volume switching, and these are set to perform automatic ventilation operation by the timer. Specifically, the number of people in the room is assumed for each time slot of the day, and ON / OFF of driving and air volume switching are set accordingly. However, it is not easy to set the timer appropriately.

Thus, a technique has been proposed in which a carbon dioxide sensor that detects indoor carbon dioxide gas is installed in the room, and the air volume of the air-conditioning ventilator is controlled in accordance with the detected concentration of carbon dioxide gas (see, for example, Patent Document 1). .
In addition, a carbon dioxide sensor that detects indoor carbon dioxide gas is installed inside the air conditioning ventilator, and a technology is proposed to control the air volume of the air conditioning ventilator according to the concentration of carbon dioxide gas inside the detected air conditioning ventilator. (For example, refer to Patent Document 2).

Japanese Patent No. 3551124 JP-A-9-159208

  However, the technique described in Patent Document 1 mainly controls the air volume according to the concentration of carbon dioxide gas. Therefore, in an air conditioning ventilator equipped with a humidity adjustment function, the necessary humidity adjustment capability cannot be obtained. There was a problem that the humidity could not be adjusted to an appropriate level.

  Moreover, in the technique described in Patent Document 2, the humidifying capacity is increased during the high air flow operation, but since the humidifier is installed in the exhaust air passage, there is a problem that the product becomes large and heavy. there were.

  The present invention has been made to solve at least one of the problems as described above, and is a humidity adjustment capable of obtaining a necessary humidity adjustment capability while performing an air volume control in accordance with an indoor carbon dioxide gas concentration. It aims at providing the ventilator for air conditioning provided with the function.

  An air-conditioning ventilator according to the present invention is provided in a supply air passage for supplying outside air into a room, a main body casing provided with an exhaust air passage for exhausting indoor air to the outside, and the supply air passage Heat exchange for exchanging heat between the supplied air supply blower, the exhaust air blower installed in the exhaust air passage, and the outside air passing through the air supply air passage and the indoor air passing through the exhaust air passage A carbon dioxide sensor for detecting the concentration of carbon dioxide from the indoor air, and the air flow rate of the air supply fan and the exhaust fan according to information acquired from at least the carbon dioxide sensor to control the air flow rate of the room One of a control unit for controlling, a humidity adjusting means for adjusting the humidity in the room, a priority for humidity that gives priority to adjusting the humidity in the room, and a priority mode for giving priority to adjusting the ventilation air volume in the room. One It includes a priority mode setting means constant for the said control unit, when said priority mode setting the priority mode by means is set in the humidity priority is to change the range for controlling the ventilating air volume.

  According to the air-conditioning ventilator according to the present invention, by setting the humidity priority mode, it is possible to obtain the necessary humidity adjustment capability while performing the air volume control according to the carbon dioxide concentration in the room. The humidity can be adjusted.

It is the cross-sectional view which simplified the internal structure of the ventilation apparatus for air conditioning which concerns on embodiment of this invention. It is the longitudinal cross-sectional view which simplified the internal structure of the ventilation apparatus for air conditioning which concerns on embodiment of this invention. It is a flowchart which shows air volume control of the ventilation apparatus for air conditioning which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one.

Embodiment.
FIG. 1 is a cross-sectional view that simplifies the internal configuration of an air-conditioning ventilator according to an embodiment of the present invention, and FIG. 2 is a simplified internal configuration of the air-conditioning ventilator according to an embodiment of the present invention. It is a longitudinal cross-sectional view. In FIG. 1, OA (Outdoor Air) indicates outside air, SA (Supply Air) indicates supply air, RA (Return Air) indicates recirculation, and EA (Exhaust Air) indicates exhaust. Moreover, the arrow in FIG. 1 and FIG. 2 has shown the flow of air.

  The air-conditioning ventilator can take in air from an air-conditioning space (for example, a house, a building, a warehouse, etc.) and discharge it outside the air-conditioning space, and can take air outside the air-conditioning space and supply it to the air-conditioning space. It can be done. In the following description, the case where the air-conditioning target space is inside a building will be described as an example. Further, “outside air” corresponds to the air supplied to the room from the air conditioning ventilator, and “indoor air” corresponds to “exhaust” discharged from the air conditioning ventilator to the outside of the room.

Hereinafter, the configuration of the air-conditioning ventilator according to the present embodiment will be described with reference to FIGS. 1 and 2.
The air-conditioning ventilator shown in FIG. 1 is formed by a rectangular parallelepiped main body casing 1, has a total heat exchanger 4 inside, and is generally installed in a state of being concealed inside the ceiling. In addition to the total heat exchanger 4, the air-conditioning ventilator has an outside air inlet 7 and an exhaust outlet 10 that are arranged in a short direction on one end surface in the longitudinal direction when the main body casing 1 is viewed in plan view, A supply air outlet 8 and an indoor air inlet 9 provided side by side in the short direction on the other end surface facing the end face, and a supply air connecting the outdoor air inlet 7 and the intake air outlet 8 via the total heat exchanger 4. An air flow path 17, an exhaust air path 18 that connects the indoor air inlet 9 and the exhaust outlet 10 through the total heat exchanger 4, an air supply fan 2 that forms a supply airflow, and an exhaust that forms an exhaust stream The blower 3, the carbon dioxide (CO ₂ ) gas sensor 20 that detects the concentration of carbon dioxide, the outside air temperature sensor 11 that measures the temperature of the outside air, the outside air humidity sensor 12 that measures the humidity of the outside air, and the indoor humidity are measured. Indoor humidity sensor 16 and remote control for various settings 15, and a control unit 14 for controlling the air volume of supply air blower 2 and the air discharge fan 3, a.

  Further, the air-conditioning ventilator according to the present embodiment has a humidifying function and a dehumidifying function, and cools or heats the dehumidified / humidified air passage 19 where dehumidification / humidification is performed in a part of the air supply air passage 17 and the supplied air flow. An air conditioning coil 5 and a humidifier 6 that humidifies the air supply airflow are provided. In the case where only the dehumidifying function is provided, only the air conditioning coil 5 is required. The air conditioning coil 5 or the air conditioning coil 5 and the humidifier 6 correspond to “humidity adjusting means” of the present invention.

The supply air passage 17 is an air passage for supplying outside air sucked from the outside air inlet 7 into the room from the supply air outlet 8, and the exhaust air passage 18 exhausts room air sucked from the indoor air inlet 9. This is an air passage for exhausting air from the air outlet 10 to the outside.
The total heat exchanger 4 is formed, for example, by adhering corrugated paper (corrugated sheet) on the flat paper, and a flat air supply passage formed by adhering corrugated paper (corrugated sheet) on the flat paper. A large number of flat exhaust passages are stacked so as to be orthogonal to each other. And it is installed between the supply air path 17 and the exhaust air path 18, and performs total heat exchange between the outside air passing through the supply air path 17 and the indoor air passing through the exhaust air path 18. The total heat exchanger 4 corresponds to the “heat exchanger” of the present invention.

The air supply blower 2 is installed on the air supply air passage 17 and includes an air supply motor 2a. When the air supply motor 2a rotates, outside air is sucked from the outside air inlet 7 and sucked. Outside air passes through the total heat exchanger 4 and is supplied from the supply air outlet 8 into the room.
The exhaust fan 3 is installed on the exhaust air passage 18 and includes an exhaust motor 3a. When the exhaust motor 3a rotates, the indoor air is sucked from the indoor air suction port 9, and the sucked room The air is exhausted from the exhaust outlet 10 to the outside through the total heat exchanger 4.
The rotation speed of the air supply motor 2a and the exhaust motor 3a varies according to the control from the control unit 14, and the ventilation air volume changes accordingly.

  The dehumidifying / humidifying air passage 19 is formed between the air supply blower 2 and the air supply outlet 8 on the downstream side of the air supply air passage 17, and is divided into upper and lower parts as viewed from the side, as shown in FIG. It consists of an upper upper dehumidifying / humidifying air passage 19a and a lower lower dehumidifying / humidifying air passage 19b. The upper dehumidifying / humidifying air passage 19a is covered with the foamed resin material 21, and the lower dehumidifying / humidifying air passage 19b is provided with a drain pan 22 made of foamed resin. A plastic material is simultaneously formed on the water receiving surface of the drain pan 22 to prevent the foamed resin from being submerged. Moreover, the foamed resin material 21 and the humidifier 6 have a fitting structure in the vertical direction.

The air conditioning coil 5 is disposed on the supply air blower 2 side of the dehumidifying / humidifying air passage 19 and constitutes an outdoor unit (not shown) provided with a compressor and a refrigerant circuit. The air conditioning coil 5 and the outdoor unit Refrigerant is circulating between And the air which passes the supply air path 17 (dehumidification / humidification air path 19) is cooled or heated with the refrigerant | coolant which circulates through the inside of the air-conditioning coil 5. FIG.
The humidifier 6 is disposed on the supply air outlet 8 side of the dehumidifying / humidifying air passage 19 and humidifies air passing through the air supply air passage 17 (dehumidifying / humidifying air passage 19). The humidifier 6 is provided with a water supply / drainage tube (not shown).
Dehumidification is performed by cooling the air passing through the supply air passage 17 (dehumidification / humidification air passage 19) through the low-temperature refrigerant in the air conditioning coil 5 and attaching water droplets to the air conditioning coil 5. The water droplets adhering to the air conditioning coil 5 are dropped and collected on the drain pan 22. On the other hand, the humidification is performed by warming the air passing through the supply air passage 17 (dehumidification / humidification air passage 19) through the high-temperature refrigerant into the air conditioning coil 5 and supplying water from the supply / drain tube of the humidifier 6 to the air. .

  The remote controller 15 is capable of ON / OFF operation, priority mode setting, operation mode setting, ventilation air volume setting, operation timer setting, and the like. The priority mode, operation mode, and ventilation air volume will be described later.

The outside air temperature sensor 11 and the outside air humidity sensor 12 are respectively provided between the outside air inlet 7 and the total heat exchanger 4. The heating capacity of the air conditioning coil 5 is determined from the temperature information of the outside air temperature sensor 11 and the humidity information of the outside air humidity sensor 12, and the air that has passed through the total heat exchanger 4 is heated. The air heated by the air conditioning coil 5 passes through the humidifier 6, becomes humidified air, and is supplied into the room from the air supply outlet 8. At that time, the humidification amount and the blowing temperature are adjusted by the heating amount of the air conditioning coil 5.
The indoor humidity sensor 16 is provided between the indoor air inlet 9 and the total heat exchanger 4 and measures indoor humidity.

  The carbon dioxide sensor 20 is provided between the indoor air inlet 9 and the total heat exchanger 4 and detects the carbon dioxide concentration of the indoor air. The installation of the carbon dioxide sensor 20 inside the main casing 1 is optimal for reducing the construction cost, for example, the control line connecting the controller 14 and the carbon dioxide sensor 20 can be made the shortest length. In addition, the carbon dioxide sensor 20 may be installed in the indoor space and connected to the control unit 14 for control. In this case, the carbon dioxide concentration in the indoor air can be detected more accurately, and the product becomes larger. Can be prevented from becoming heavy.

  The control unit 14 is provided at a position where maintenance of the side surface of the main body casing 1 can be performed, and the air supply is performed according to the set ventilation air volume or according to the information acquired from the carbon dioxide sensor 20 (the carbon dioxide concentration in the room air). The indoor ventilation air volume is controlled by controlling the rotation of the motor 2a and the exhaust motor 3a to control the air volume of the air supply fan 2 and the exhaust fan 3.

Here, a method for controlling the ventilation air volume according to the information acquired from the carbon dioxide sensor 20 will be described in the case where the range in which the ventilation air volume can be controlled is composed of three stages of “strong”, “weak”, and “weak”.
When the information acquired from the carbon dioxide concentration is equal to or less than the threshold value between “weak” and “weak”, the control unit 14 supplies the air supply blower 2 and the exhaust blower so that the ventilation airflow becomes “weak”. 3 is controlled. In addition, when the information obtained from the carbon dioxide concentration exceeds the threshold value between “weak” and “weak” and is below the threshold value between “strong” and “weak”, the ventilation airflow is The air volume of the air supply fan 2 and the exhaust fan 3 is controlled so as to be “weak”. Further, when the information acquired from the carbon dioxide concentration exceeds a threshold value between “strong” and “weak”, the air supply blower 2 and the exhaust blower 3 are set so that the ventilation airflow becomes “strong”. Control airflow.
The control unit 14 is provided with a DIPSW 14a for setting a priority mode.

Next, functions of the air conditioning ventilator according to the present embodiment will be described.
The air-conditioning ventilator according to the present embodiment has two priority modes: a “ventilation priority” mode and a “dehumidification / humidification priority” mode.
“Ventilation priority” mode prioritizes adjustment of indoor ventilation air volume over adjustment of indoor humidity, and “Dehumidification / humidification priority” mode prioritizes adjustment of indoor humidity over adjustment of indoor ventilation air volume. It is a mode to make it. These two priority modes can be set by the remote controller 15, but can also be set in advance by a DIPSW 14a provided in the control unit 14. Therefore, the air conditioning ventilator that does not include the remote controller 15 can be set by the DIPSW 14a. The priority mode “dehumidification / humidification priority” corresponds to “humidity priority” of the present invention. The DIPSW 14a and the remote controller 15 correspond to “priority mode setting means” of the present invention. The remote controller 15 corresponds to “ventilation air volume setting means” and “operation mode setting means” of the present invention.

Further, operation modes of “dehumidifying operation”, “humidifying operation”, “cooling operation”, “heating operation”, and “dehumidifying operation” are provided.
“Dehumidifying operation” is a mode that lowers indoor humidity, “Humidifying operation” is a mode that raises indoor humidity, “Cooling operation” is a mode that lowers indoor temperature, and “Heating operation” is indoor temperature. The “air blowing operation” is a mode in which air is sent out without air conditioning in the room. Note that the thermo ON / OFF is not performed during the “air blowing operation” mode, that is, the thermo OFF state is set. Here, when one air-conditioning ventilator is configured for one outdoor unit (that is, one-to-one), the thermo-ON operates the air-conditioning coil 5 and the compressor of the outdoor unit that constitutes the refrigerant circuit. The thermo OFF means that the compressor is stopped. In addition, in the case where the total number of air-conditioning ventilators and indoor units is one unit (ie one-to-multiple) for one outdoor unit, the thermo-ON is an expansion valve (not shown) such as LEV. The refrigerant is opened and circulated through the system, and the thermo-OFF means that an expansion valve (not shown) such as LEV is closed to stop the circulation of the refrigerant in the system.
In addition, the ventilation air volume can be set in three stages of “strong”, “weak”, and “weak”. Furthermore, the ventilation air volume can be set to "automatic", and if it is set to "automatic", the ventilation air volume control is automatically performed according to the carbon dioxide gas concentration, and the ventilation air volume control is "strong", "weak", Performed in the “weak” range.
The function of the air conditioning ventilator is not limited to the above.

FIG. 3 is a flowchart showing air volume control of the air-conditioning ventilator according to the embodiment of the present invention.
Hereinafter, the control flow of the air-conditioning ventilator according to the present embodiment will be described with reference to FIG.
First, the priority mode is set by the DIPSW 14a or the remote controller 15 (S1). Then, it is determined which priority mode is set (S2). If the “ventilation priority” mode is set, the process proceeds to S3. Next, in S3, it is determined whether or not the ventilation air volume setting is “automatic”. If the ventilation air volume setting is not “automatic”, the process proceeds to S4, and the set ventilation air volume is controlled. On the other hand, if the ventilation air volume setting is “automatic”, the process proceeds to S 5, and information on the carbon dioxide concentration in the room air is acquired from the carbon dioxide sensor 20. Thereafter, the ventilation air volume is controlled to one of “strong”, “weak”, and “weak” according to the acquired information on the carbon dioxide concentration of the indoor air (S6).

On the other hand, if the “dehumidification / humidification priority” mode is set, the process proceeds to S7. Next, in S7, it is determined whether or not the ventilation air volume setting is “automatic”. If the ventilation air volume setting is not “automatic”, the process proceeds to S8 to control the set ventilation air volume. When the ventilation air volume setting is “weak”, the ventilation air volume is switched to “weak” and the thermo is forcibly turned off even in the “dehumidification / humidification priority” mode.
On the other hand, if the ventilation air volume setting is “automatic”, the process proceeds to S 9, and information on the carbon dioxide concentration in the room air is acquired from the carbon dioxide sensor 20. Thereafter, it is determined whether or not the operation mode is set to “fan” (S10). When the operation mode is set to “air blowing”, the ventilation air volume is controlled to one of “strong”, “weak”, and “weak” according to the information on the carbon dioxide concentration of the acquired indoor air (S11). . On the other hand, when the operation mode is not set to “air blowing”, the ventilation air volume is controlled to either “strong” or “weak” according to the acquired information on the carbon dioxide concentration of the indoor air (S12). In other words, if the priority mode is "Dehumidification / humidification priority", the ventilation air volume setting is "Automatic", and the operation mode is not set to "Blower", the ventilation air volume control is performed in the range of "High" and "Low" . That is, the “weak” range is excluded.

Here, when controlling the ventilation air volume according to the carbon dioxide gas concentration, if the air is turned “weak” in the ON state of the thermostat, the air volume is insufficient with respect to the capacity of the air conditioning coil 5 and a low pressure abnormality or a high pressure abnormality occurs. However, the air conditioner coil 5 and the compressor of the outdoor unit constituting the refrigerant circuit may stop due to this.
Therefore, in order to prevent an abnormal stop due to the above shortage of air volume, if the priority mode is `` priority for dehumidification '' and the ventilation air volume setting is `` automatic '' and the operation mode is not set to `` air blowing '', Exclude the “weak” range. That is, the range for controlling the ventilation airflow is changed to a range in which an abnormal stop is not caused by the airflow shortage.

  When the operation mode is set to “air blowing”, the thermo ON / OFF is not performed during that time, but when the operation mode is other than “air blowing” (for example, “humidification”), the thermo ON / OFF is performed. Therefore, in the operation modes other than “air blowing”, when the ventilation air volume setting is set to three levels of “strong”, “weak”, and “weak”, in the “dehumidification / humidification priority” mode, priority is given to adjusting the humidity in the room. The air volume is not lowered to “weak” where the thermo-off and the humidifying and dehumidifying capabilities become low. Then, the ventilation air volume is controlled to either “strong” or “weak” according to the carbon dioxide gas concentration. In other words, from the carbon dioxide concentration, the place where the ventilation airflow is switched to “weak” is switched to “weak”. Although “weak” is switched to “weak”, the present invention is not limited to this, and the threshold value may be changed when the ventilation airflow is set in three steps and two steps.

By doing so, since the thermo-OFF is not forcibly turned off, it is possible to appropriately adjust the indoor humidity without lowering the humidifying ability and the dehumidifying ability.
Moreover, in the “air blowing” operation mode, the thermo ON / OFF is not performed during that time, and there is no problem even if the ventilation air volume is switched to “weak”. Therefore, it is possible to switch between the three levels of “strong”, “weak”, and “weak”. The indoor ventilation air volume can be adjusted appropriately.
Also, when the thermo is turned off during the “humidification” or “dehumidification” operation, the two steps are “strong” and “weak”.

  On the other hand, in the “ventilation priority” mode, priority is given to the adjustment of the indoor ventilation air volume, so it is necessary to switch the ventilation air volume in the widest possible range according to the carbon dioxide concentration. Therefore, in any operation mode, switching is performed in three stages of “strong”, “weak”, and “weak”. Thus, the ventilation air volume in the room can be adjusted appropriately by switching the ventilation air volume in three stages according to the carbon dioxide gas concentration regardless of the operation mode.

  If indoor humidity information is acquired from the indoor humidity sensor 16 and the information exceeds the preset humidity if the humidifying operation is performed, or if the humidity is less than the preset humidity if the dehumidifying operation is performed. It may be possible to automatically switch to the “ventilation priority” mode and to the “dehumidification / humidification priority” mode in other cases, or a human sensor is installed in the room and the information acquired from the human sensor is If there is detection, the mode may be automatically switched to the “dehumidification / humidity priority” mode, and if no person is detected, the mode may be automatically switched to the “ventilation priority” mode.

  DESCRIPTION OF SYMBOLS 1 Main body casing, 2 Supply air blower, 2a Supply air motor, 3 Exhaust air blower, 3a Exhaust motor, 4 Total heat exchanger, 5 Air conditioning coil, 6 Humidifier, 7 Outside air inlet, 8 Supply air outlet , 9 Indoor air inlet, 10 Exhaust outlet, 11 Outside air temperature sensor, 12 Outside air humidity sensor, 14 Control unit, 14a DIPSW, 15 Remote control, 16 Indoor humidity sensor, 17 Supply air passage, 18 Exhaust air passage, 19 Dehumidification / humidification Air path, 19a Upper dehumidifying / humidifying air path, 19b Lower dehumidifying / humidifying air path, 20 Carbon dioxide sensor, 21 Foamed resin material, 22 Drain pan.

Claims (8)

A main body casing having an air supply path for supplying outside air into the room, and an exhaust air path for exhausting room air to the outside;
An air supply fan installed in the air supply air passage;
An exhaust fan installed in the exhaust air passage;
A heat exchanger for exchanging heat between outside air passing through the supply air passage and indoor air passing through the exhaust air passage;
A carbon dioxide sensor that detects the concentration of carbon dioxide from indoor air,
A control unit that controls the air volume of the air supply fan and the exhaust air fan according to the information acquired from at least the carbon dioxide sensor to control the indoor ventilation air volume;
Humidity adjustment means for adjusting indoor humidity;
Priority mode setting means for setting any one of at least humidity priority that prioritizes adjustment of indoor humidity and ventilation priority priority mode that prioritizes adjustment of indoor ventilation airflow,
The controller is
When the priority mode is set to humidity priority by the priority mode setting means,
A range for controlling the ventilation air volume is changed. The controller is
When the priority mode is set to humidity priority by the priority mode setting means,
The range for controlling the ventilation air volume is changed to a range that does not cause an abnormal stop due to an insufficient air volume. Ventilation air volume setting means for setting at least one of strong, weak, weak, and automatic ventilation air volume is provided,
The controller is
When the ventilation air volume is automatically set by the ventilation air volume setting means,
Controlling the ventilation air volume according to the information acquired from the carbon dioxide sensor,
The air conditioning ventilator according to claim 1 or 2, wherein the ventilation air volume is controlled to a set strength when set to other than automatic. The controller is
When the ventilation air volume is automatically set by the ventilation air volume setting means,
The carbon dioxide concentration obtained from the carbon dioxide sensor is
Control the ventilation air volume so that it becomes weak when it is below the threshold value between weak and weak,
The ventilation air volume is controlled so as to be weak when a threshold value between weak and weak is exceeded and less than a threshold value between strong and weak,
The air-conditioning ventilator according to claim 3, wherein the ventilation air volume is controlled to be strong when a switching threshold value between strong and weak is exceeded. At least an operation mode setting means for setting any one of blowing and dehumidifying or humidifying operation modes is provided,
When the ventilation air volume is automatically set by the ventilation air volume setting means, and when the operation mode is set to other than the air blowing by the operation mode setting means,
The said control part changes the range which controls the said ventilation air volume. The ventilation apparatus for air conditioning of Claim 3 or 4 characterized by the above-mentioned. The controller is
When the ventilation air volume is set to automatic by the ventilation air volume setting means, and when the operation mode is set to the air blowing by the operation mode setting means,
According to the information acquired from the carbon dioxide sensor, the ventilation air volume is controlled to any one of strong, weak, and weak,
When the ventilation air volume is set to automatic by the ventilation air volume setting means, and when the operation mode is set to the air blowing by the operation mode setting means,
In order to prevent an abnormal stop due to insufficient airflow,
The ventilation apparatus for air conditioning according to claim 5, wherein the ventilation air volume is controlled to one of strong and weak according to the information acquired from the carbon dioxide sensor. It has a humidity sensor that detects indoor humidity,
The controller is
Information acquired from the humidity sensor
If the humidity exceeds the preset humidity during the humidification operation, or if the humidity is less than the preset humidity during the dehumidification operation, the priority mode is switched to ventilation priority, and otherwise the humidity priority is switched. The ventilation apparatus for air conditioning as described in any one of Claims 1-6 characterized by the above-mentioned. It has a human sensor that detects people,
The controller is
Information acquired from the human sensor is
The air-conditioning ventilator according to any one of claims 1 to 6, wherein the priority mode is switched to humidity priority when there is a human detection, and the ventilation priority is switched otherwise.

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