JP7453028B2 - Outside air processing equipment and air conditioning system - Google Patents

Description

Embodiments of the present invention relate to an outside air processing device and an air conditioning system.

2. Description of the Related Art Outdoor air processing devices that control room temperature and indoor static pressure are known. For example, an outside air processing device adjusts the temperature of outdoor air and forces it into the room, thereby making the pressure inside the room higher than that outside. As a result, the air inside the room is pushed out to the outside, suppressing the intrusion of outside air, and keeping the inside of the room clean without allowing dirt, dust, etc. from the outside air to enter the room.

Indoor air whose static pressure is set to positive pressure is exhausted to the outside through opening and closing of doorways, ventilation fans, and small gaps in the room. For example, there are known blower devices such as ventilation fans that determine the rotational speed of a motor based on a target air volume calculated from the rotational speed of the motor in order to maintain a constant amount of air discharged outdoors. A room equipped with such an outside air processing device and an exhaust device is known.

International Publication No. 2016-067552

However, in order to control positive or negative pressure in various rooms and buildings, it is necessary to consider the capacity of the ventilation fan installed in the room or building, the amount of air leakage between the indoor and outdoor spaces from gaps in the room, and the size of the room. It is necessary to control the amount of air blown by the outside air processing device under various conditions such as the arrangement of the pods.

For example, indoor static pressure can be detected by measuring the pressure difference between indoors and outdoors using a differential pressure sensor. However, providing measurement devices such as differential pressure sensors indoors and outdoors increases the cost of the outside air processing device. Additionally, regular maintenance of these measuring devices is a hassle.

The problem to be solved by the present invention is to provide an outside air processing device and an air conditioning system that can reliably control indoor pressure to positive or negative pressure without using a differential pressure sensor.

An outside air processing device according to one embodiment includes a motor, a detection section, an input section, a calculation section, and a control section. The motor drives the fan. The detection unit detects the amount of electric power and the number of rotations of the motor. The input unit receives input of a target air volume that can be operated by a user. The arithmetic unit selects the formula according to the motor rotation speed obtained by the detection unit, from among at least two different formulas that are used depending on the motor rotation speed and calculates the current air volume using the motor's power amount and rotation speed as variables. The current air volume is calculated by inputting the electric power and rotation speed of the motor detected by the detection unit. The control unit controls the motor so that the air volume becomes a target air volume based on the current air volume.

FIG. 1 is a conceptual configuration diagram showing an example of an outside air processing device according to an embodiment. FIG. 2 is a block diagram showing the functional configuration of the indoor unit of the outside air processing device according to the embodiment. FIG. 3 is a flowchart showing an example of the operation of the outside air processing device according to the embodiment. FIG. 4(a) is a schematic diagram of the remote control of the outside air processing device according to the embodiment, FIG. 4(b) is a display example of the air volume setting screen on the LCD screen of the remote controller, and FIG. 4(c) is the LCD of the remote controller. Display example of the temperature setting screen on the display screen.

Hereinafter, an outside air processing device and an air conditioning system according to an embodiment will be described with reference to the drawings.

FIG. 1 is a conceptual configuration diagram showing an example of an outside air processing device 100 according to an embodiment. As shown in FIG. 1, the room 30 in which the outside air processing device 100 is installed has a ventilation fan 300 and an automatic door that allows air to flow between the inside and outside when opened, as an exhaust port for air from the inside 10 to the outside 20. It has an entrance/exit 200.

The outside air processing device 100 includes an indoor unit 1 and an outdoor unit 2. The indoor unit 1 and the outdoor unit 2 are connected through a communication line 31. The indoor unit 1 and the outdoor unit 2 exchange information via a communication line 31 for the status and instructions of both devices.

The outside air processing device 100 takes in fresh air from the outside 20, adjusts it to an appropriate temperature, and introduces it into the room 10. This outside air processing device 100 can maintain the static pressure in the room 10 at a negative pressure or a positive pressure by controlling the amount of air introduced into the room 10 from the outdoors 20. Moreover, the temperature of the indoor room 10 can be controlled by cooling or heating the air taken in from the outdoor room 20 by passing it through a heat exchanger of a refrigeration cycle while supplying it to the indoor room 10 . The configuration of the outside air processing device 100 that introduces air from the outdoors 20 into the indoors 10 and maintains the indoors 10 at either negative pressure or positive pressure will be described below.

The outdoor unit 2 is installed outdoors 20. The outdoor unit 2 houses refrigeration cycle parts such as an outdoor heat exchanger, an outdoor fan, and a compressor. The indoor unit 1 is installed indoors 10 and includes an indoor heat exchanger (not shown) connected to the refrigeration cycle of the outdoor unit 2 through a refrigerant pipe 32. When the outside air processing device 100 starts operating, the fan motor 4 of the indoor unit 1 is driven to draw outside air into the indoor unit 1 from the outside air intake port provided in the outdoor unit 2 . At this time, impurities in the outside air are removed by a filter provided in the outdoor unit 2, and clean air is introduced into the indoor unit 1. Thereafter, temperature-controlled air is introduced into the room 10 via the indoor heat exchanger, thereby adjusting the temperature of the room 10.

The indoor unit 1 includes a fan motor 4 and a controller 5. The fan motor 4 is a motor that drives a fan based on control from the controller 5. The fan motor 4 is, for example, a brushless DC motor.

The controller 5 performs various controls such as communication control between the indoor unit 1 and outdoor unit 2 and rotation control of the fan motor 4, and centrally controls the outside air processing device 100. The controller 5 includes, for example, a processor and a memory. The controller 5 realizes various controls of the outside air processing device 100 by causing the processor to execute various control programs from the memory.

The controller 5 is connected to an input device such as a remote control (remote control device) 6. The controller 5 controls the outside air processing device 100 based on an operation input signal from the remote controller 6. The remote control 6 receives input of various settings of the outside air processing device 100, such as target air volume and temperature settings, which can be operated by the user, for example.

Here, the target air volume can be set to an arbitrary value for each room 30 in which the outside air processing device 100 is installed by an operation by a user or the like. The target air volume is determined based on the air volume of an exhaust device such as a ventilation fan.

The remote control 6 has, for example, a liquid crystal screen, and displays the settings of the outside air processing device 100 on the liquid crystal screen. The liquid crystal screen of the remote control 6 may be, for example, a touch pad on which a user performs an input operation by touching the operation surface, or may have a non-contact input circuit using an optical sensor. Alternatively, it may be a touch panel type liquid crystal screen in which the input interface and the display are integrated. Furthermore, the remote control 6 may be configured to include a voice input circuit or the like and be operable by voice input. A display example on the liquid crystal screen of the remote control 6 will be described in detail with reference to FIG. 4, which will be described later.

The controller 5 controls the rotation of the fan motor 4 based on a detection signal from a detection unit 7 (see FIG. 2) that monitors the operation of the fan motor 4, and controls the amount of air flowing into the room 10. The controller 5 also controls the rotation of the fan motor 4 based on the detection signal from the detection unit 7 and the operation input signal input from the remote controller 6, and controls the air flow into the room 10 from the remote controller 6. control to achieve the target air volume.

When the rotation speed of the fan motor 4 is constant, for example, if the pressure loss increases due to clogging of the filter provided in the outdoor unit 2, the amount of air supplied to the room 10 decreases, and the static pressure in the room 10 decreases. descend. Therefore, in order to increase the static pressure in the room 10, it is necessary to increase the rotational speed of the fan motor 4 to increase the amount of air output from the outside air processing device 100.

Therefore, the inventors of the outside air processing device 100 of this embodiment focused on the fact that the amount of air supplied to the room 10 by the outside air processing device 100 can be approximated by the number of rotations and the amount of electric power of the fan motor 4, and set the amount of air at a constant value. We came up with the idea of keeping the static pressure in the room 10 at positive or negative pressure by controlling the amount of air and by appropriately setting the air volume. The outside air processing device 100 of this embodiment predicts the current air volume supplied to the room 10 from the operation of the fan motor 4, and automatically controls the rotation speed of the fan motor 4 based on the predicted current air volume. Thereby, the outside air processing device 100 can control the volume of temperature-controlled air blown into the room 10 to a constant value. As a result, by setting an appropriate air volume according to the situation in the room 30, the static pressure in the room 10 can be reliably controlled to positive pressure or negative pressure.

That is, when controlling to positive pressure, if the rated air volume of the forced exhaust device installed in the room 30, the ventilation fan 300 in the example of FIG. If the air volume is set to be larger than the rated air volume, for example, 220 m3/h, the air volume of the outside air processing device 100 will be larger than the air volume of the ventilation fan 300 in any case, and the indoor air 10 will have a positive pressure. On the other hand, if the air volume of the outside air processing device 100 is set to less than the rated air volume of the ventilation fan 300, for example, 180 m<3>/h, the indoor pressure can always be maintained at negative pressure. If there are multiple ventilation fans 300, the air volume of the outside air processing device 100 may be set based on the total rated air volume of the ventilation fans 300.

In addition, in order to accurately set the positive pressure and negative pressure, it is necessary to consider the amount of air leakage between the indoor 20 and outdoor 20 through the gap in the room 30, If all you want to do is set the air volume of the outside air processing device 100 as described above.

Therefore, for example, when a user of the room 10 wishes to create positive pressure, he or she checks the rated air volume of the exhaust device installed in the room 30 and operates the remote control 6 to increase the air volume of the outside air processing device 100. By simply setting the air volume to a value larger than the rated air volume of the device, the room 10 can be reliably controlled to have a positive pressure.

The detection unit 7 outputs measured values such as the voltage applied to the fan motor 4, the current flowing through the fan motor 4, and the rotation speed of the fan motor 4 to the controller 5. Further, the detection unit 7 may calculate the amount of electric power from the voltage applied to the fan motor 4 and the current flowing through the fan motor 4. Note that the rotation speed of the fan motor 4 may be calculated based on the current or voltage detected by the detection unit 7 instead of having a sensor that measures the rotation speed. Note that the detection unit 7 may be an ammeter and a voltmeter that measure the voltage applied to the fan motor 4 and the current flowing through the fan motor 4. In this case, the controller 5 which has acquired the current and voltage detected by the detection unit 7 may calculate the rotation speed and power amount of the fan motor 4. Hereinafter, a case where the rotational speed and power amount of the fan motor 4 acquired by the detection unit 7 are output to the controller 5 will be described as an example.

FIG. 2 is a block diagram showing the functional configuration of the indoor unit 1 of the outside air processing device 100 according to the embodiment. As shown in FIG. 2, the controller 5 has a calculation function 51, a motor control function 52, and a memory 53. The calculation function 51 and the motor control function 52 are realized by the processor of the controller 5 executing a program stored in the memory 53.

The detection unit 7 calculates the amount of electric power of the fan motor 4 based on the detected current and voltage. Further, the detection unit 7 calculates the rotation speed of the fan motor 4 based on the detected current or voltage.

The calculation function 51 acquires the electric power amount and rotation speed of the fan motor 4 from the detection unit 7 . The calculation function 51 calculates the current air volume in the room 10 based on the electric power amount and rotation speed of the fan motor 4. Furthermore, the calculation function 51 calculates the amount of electric power of the fan motor 4 that keeps the air volume in the room 10 constant based on the calculated current air volume. The motor control function 52 controls the drive of the fan motor 4 based on the amount of electric power calculated by the calculation function 51.

Furthermore, the calculation function 51 calculates the electric power amount of the fan motor 4 so that the air volume in the room 10 becomes the target air volume input from the remote controller 6 based on the current air volume.

In addition to storing various control programs and setting values, the memory 53 may also store in advance a mathematical formula for calculating the current air volume from the power amount and rotational speed of the fan motor 4 obtained from the detection unit 7. Further, the memory 53 may store various setting values based on operation input signals input from the remote controller 6.

FIG. 3 is a flowchart illustrating an example of the operation of the outside air processing device 100 according to the embodiment. Hereinafter, the operation of the outside air processing device 100 according to the embodiment will be described according to the step numbers of the flowchart in FIG. 3. Note that FIG. 3 shows a case where the outside air processing device 100 controls the operation of the fan motor 4 based on the current air volume calculated by the calculation function 51 so that the air volume in the room 10 becomes the target air volume input from the remote controller 6. This will be explained as an example.

In step S101, operation of the outside air processing device 100 starts. The operation of the outside air processing device 100 starts, for example, when the operation stop button 63 (see FIG. 4) of the remote control 6 is pressed while the outside air processing device 100 is stopped. When the outside air processing device 100 starts operating, the fan motor 4 starts.

In step S102, the controller 5 drives the fan motor 4 with constant power for a predetermined time when the fan motor 4 is activated as an initial control. For example, the fan motor 4 is started and initial control is performed until the fan motor 4 reaches a rotational speed at which the air volume can be stably obtained. The controller 5 may determine that the initial control has been completed based on the fact that the rotation speed of the fan motor 4 exceeds a predetermined threshold, or may determine that the initial control has been completed based on the elapsed time from the activation of the fan motor 4. You may decide that it has ended.

In step S103, the calculation function 51 obtains the target air volume input from the remote controller 6. For example, when maintaining the indoor air pressure at a positive pressure, an air volume larger than the air volume discharged from the indoor room 10 to the outdoor air 20 is input to the remote control 6 as the target air volume. For example, the user inputs into the remote controller 6 an air volume larger than the rated air volume of the exhaust device or ventilation fan 300 installed in the room 30 as the target air volume. The target air volume input from the remote controller 6 may be temporarily stored in the memory 53, and the calculation function 51 may acquire the target air volume stored in the memory 53.

Note that the timing at which the calculation function 51 acquires the target air volume input from the remote controller 6 is not limited to the timing of step S103. The timing at which the calculation function 51 acquires the target air volume may be, for example, before the initial control in step S102 ends, and the calculation function 51 can obtain the target air volume from after the outside air processing device 100 is started until after the current air volume is calculated (step S105). The target air volume may be acquired at any timing. Hereinafter, the method of inputting the target air volume from the remote controller 6 will be described in detail using FIG. 4.

FIG. 4A is a schematic diagram of the remote control 6 of the outside air processing device 100 according to the embodiment. As shown in FIG. 4A, the remote control 6 has a liquid crystal screen 61, a switching button 62, a stop button 63, an up button 64, and a down button 65.

The operation stop button 63 is a button for operating and stopping the outside air processing device 100. When the operation stop button 63 is pressed while the outside air processing device 100 is stopped, the outside air processing device 100 starts operating. On the other hand, when the operation stop button 63 is pressed while the outside air processing device 100 is in operation, the outside air processing device 100 stops operating.

The switching button 62 is a button for switching between the air volume setting and the temperature setting to be executed. For example, if the switch button 62 is pressed during temperature setting, the setting switches to air volume setting. On the other hand, if the switch button 62 is pressed during air volume setting, the setting switches to temperature setting.

The up button 64 and the down button 65 are buttons for inputting parameters such as temperature and air volume. Specifically, each of the up button 64 and the down button 65 is assigned a numerical value that can be changed with each press. The user can change the temperature and air volume settings depending on the type and number of times the button is pressed. For example, in air volume setting, by operating the up button 64 or the down button 65, the target air volume can be changed every 50 cmh (cubic meter per hour, m ³ /h). Therefore, by operating these buttons, the user can set an air volume higher than the rated air volume of the exhaust device if he or she wants to create positive pressure, or set an air volume that is lower than the rated air volume of the exhaust device if he or she wants to create negative pressure. Set. Similarly, in setting the temperature, for example, by operating the up button 64 or the down button 65, the set temperature can be changed in increments of 0.5°C.

The setting screen selected by the switching button 62 is displayed on the liquid crystal screen 61. FIG. 4(b) is a display example of the air volume setting screen 61a on the liquid crystal display screen of the remote controller 6. Further, FIG. 4(c) is a display example of the temperature setting screen 61b on the liquid crystal display screen of the remote controller. Each time the switching button 62 is pressed, the display between the air volume setting screen 61a and the temperature setting screen 61b is switched.

As shown in FIG. 4(b), the air volume setting screen 61a is a screen for setting a target air volume for the outside air processing device 100. The target air volume is displayed at the top of the air volume setting screen 61a. When changing the displayed target air volume, the user presses the up button 64 or the down button 65 to change the numerical value to the desired air volume. Further, the air volume setting screen 61a may simultaneously display an operation mode indicating whether the outside air processing device 100 is in a heating operation or a cooling operation, a set temperature, and the like.

When the switch button 62 is pressed while the air volume setting screen 61a shown in FIG. 4(b) is displayed on the liquid crystal screen 61, the display switches to the temperature setting screen 61b shown in FIG. 4(c). As shown in FIG. 4C, the temperature setting screen 61b is a screen for setting the temperature of the outside air processing device 100. As in the case of the air volume setting screen 61a, the set temperature is displayed at the top of the temperature setting screen 61b. The user presses the up button 64 or the down button 65 to change the value to the desired temperature. Further, the temperature setting screen 61b may simultaneously display an operation mode indicating whether the outside air processing device 100 is in a heating operation or a cooling operation, a target air volume, and the like.

The above is a description of an example of the display on the liquid crystal screen of the remote controller 6. The user inputs a desired target air volume on the air volume setting screen 61a of the remote controller 6 shown in FIG. 4 (step S103). Returning to FIG. 3, the explanation of the flowchart will be continued.

In step S<b>104 , the calculation function 51 acquires the power amount and rotation speed of the fan motor 4 from the detection unit 7 .

In step S105, the calculation function 51 calculates the current air volume in the room 10 based on the electric power amount and rotation speed of the fan motor 4. The current air volume Qa (cmh) is determined, for example, by the following formula using the electric power Pa (W) of the fan motor 4 and the rotation speed Na (rpm: rotations per minute, r/min) as variables.

The coefficients a, b, c, d, e, and intercept g of Equation 1 are determined in advance from the actual measured values of the electric power, rotation speed, and air volume of the fan motor 4.

The calculation function 51 applies the electric power amount and rotation speed of the fan motor 4 obtained from the detection unit 7 to the above-mentioned formula 1 read from the memory 53, and calculates the current air volume Qa. Note that Equation 1 is an example of an equation for determining the current air volume, and is not limited to Equation 1 as long as the current air volume can be predicted.

Further, for example, the number of formulas used to calculate the current airflow rate is not limited to one. Specifically, two or more different equations may be used depending on the rotation speed (Na) of the fan motor 4. By using different formulas, errors in calculating the current air volume can be suppressed. For example, the calculation function 51 may use different formulas depending on whether the rotation speed of the fan motor 4 is less than or equal to a predetermined threshold value or when it is greater than a predetermined threshold value.

Furthermore, the calculation function 51 may calculate an average current air volume by averaging a plurality of current air volumes calculated at predetermined time intervals. For example, the current air volume is calculated based on the power amount and rotational speed acquired every detection cycle in the detection unit 7 or every communication cycle between the detection unit 7 and the controller 5, and The average current air volume may be calculated by averaging the current air volume (minutes). Since the current air volume is a numerical value predicted by calculation, the estimation accuracy can be improved by averaging a plurality of estimated values.

In step S106, the calculation function 51 calculates a control value for the fan motor 4 that brings the air volume in the room 10 to the target air volume based on the current air volume. The calculation function 51 calculates, for example, the amount of power of the fan motor 4 according to the target air volume from the difference between the current air volume and the target air volume. The motor control function 52 controls the drive of the fan motor 4 based on the calculated amount of electric power.

The motor control function 52 controls the drive of the fan motor 4 by, for example, PI control. At this time, the motor control function 52 may change the gain in the PI control according to the difference between the current air volume and the target air volume so that the operation of the fan motor 4 is not changed suddenly. Further, the motor control function 52 may limit the amount of power supplied to the fan motor 4 based on the upper limit value and lower limit value of the rotation speed as protection control of the fan motor 4 .

In step S107, the controller 5 determines whether the outside air processing device 100 is in operation. If the outside air processing device 100 is in operation, the process branches to Yes in step S107 and proceeds to the process in step S103. That is, while the outside air processing device 100 is in operation, the controller 5 calculates the current air volume and repeats the process of controlling the drive of the fan motor 4 so that the air volume in the room 10 becomes the target air volume (steps S103 to S106). process is executed repeatedly).

On the other hand, when the outside air processing device 100 stops operating, the process branches to No in step S107. For example, when the operation stop button 63 of the remote controller 6 is pressed, the controller 5 stops driving the fan motor 4 and executes a process of stopping the outside air processing device 100.

The above is the explanation of the flowchart. In FIG. 3, an example has been described in which the current air volume in the room 10 is calculated from the operation of the fan motor 4, and the fan motor 4 is controlled so that the air volume in the room 10 becomes the target air volume input from the remote controller 6. However, air volume control based on the current air volume is not limited to this example.

For example, the controller 5 may compare the current air volume calculated in the past (past air volume) with the current air volume calculated, and perform feedback control on the fan motor 4 so that the air volume in the room 10 is constant. . Specifically, the calculated current air volume is stored in the memory 53, and the past air volume calculated at a certain point in the past is compared with the current air volume calculated at the present time, and the air volume in the room 10 is determined to be the past air volume. The drive of the fan motor 4 is controlled so that they are the same. Such feedback control allows the air volume in the room 10 to be kept constant.

Note that the past air volume may be the current air volume calculated one time before the newly calculated current air volume, or the current air volume calculated when the outside air processing device 100 is operating stably. good. Further, the start of constant air volume control may be set in the outside air processing device 100 via the remote controller 6 while the outside air processing device 100 is operating stably. In this way, the past air volume may be used as the target air volume without inputting the target air volume as a numerical value from the remote controller 6.

Note that the air volume constant control by the outside air processing device 100 described above can be applied to an air conditioning system including the outside air processing device 100. For example, the air conditioning system includes an outside air processing device 100 and an exhaust device that exhausts indoor air to the outdoors. The exhaust device is a device that exhausts air to the outside from an internal space of a room 30, a building, or the like that is subject to constant air volume control by the outside air processing device 100. By setting a target air volume in the outside air processing device 100 based on the rated air volume of the exhaust device, the air conditioning system can easily maintain positive pressure or negative pressure in the space that is subject to constant air volume control by the outside air processing device 100. can.

More specifically, when it is desired to maintain a positive pressure in the interior space of the room 30 or building, the target air volume is set in the outside air processing device 100 to be larger than the rated air volume of the exhaust device installed in the room 30 or the building. . Furthermore, when it is desired to maintain the internal space of the room 30 or building at a negative pressure, a target air volume smaller than the rated air volume of the exhaust device installed in the room 30 or the building is set in the outside air processing device 100.

As described above, the outside air processing device 100 according to the present embodiment has a calculation function that calculates the current air volume based on the power amount and rotation speed of the fan motor 4 detected by the detection unit 7. As a result, the outside air processing device 100 according to the present embodiment realizes constant air volume control and can maintain the indoor pressure or negative pressure in the room 10 without using a differential pressure sensor.

Furthermore, the outside air processing device 100 according to the present embodiment includes an external input device such as a remote control 6 that can be operated by a user. By allowing the target air volume to be input from the remote controller 6, the target air volume can be easily set according to the type of room or building in which the outside air processing device 100 is installed.

Furthermore, the calculation function 51 of the outside air processing device 100 according to the present embodiment calculates the current air volume using a formula for calculating the current air volume using the electric energy and rotation speed of the fan motor 4 as variables. Therefore, the current air volume can be calculated using the existing configuration of the outside air processing device 100.

The calculation function 51 of the outside air processing device 100 according to the present embodiment calculates the current air volume by using at least two different formulas depending on the rotation speed of the fan motor 4. Therefore, it is possible to suppress errors with actual measured values caused by the approximate expression.

The calculation function 51 of the outside air processing device 100 according to the present embodiment calculates a plurality of current air volumes from the power amount and rotation speed of the fan motor 4 acquired at predetermined intervals, and calculates the average value of the calculated current air volumes. The operation of the fan motor 4 is controlled based on this. Therefore, an error in estimating the current air volume estimated from the power amount and rotation speed of the fan motor 4 can be suppressed.

The input unit of the outside air processing apparatus 100 according to the present embodiment is provided in an input device such as the remote controller 6, and can input a set indoor temperature in addition to a target air volume. Therefore, the outside air processing device 100 according to the present embodiment can adjust the indoor temperature in addition to the indoor static pressure according to the user's request.

The air conditioning system according to this embodiment includes the above-described outside air processing device 100 and an exhaust device. Thereby, the air conditioning system according to the present embodiment can set a target air volume for the outside air processing device 100 based on the rated air volume of the exhaust device. Therefore, for example, if you want to maintain positive pressure in the room 30, by setting the target air volume in the outside air processing device 100 to a larger air volume than the rated air volume of the exhaust device, the room 30 can be maintained at a constant air volume control of the outside air processing device 100. Can maintain positive pressure. In addition, if you want to keep the room 30 at negative pressure, by setting the target air volume in the outside air processing device 100 to a smaller air volume than the rated air volume of the exhaust device, the room 30 can be kept under negative pressure by controlling the air volume constant of the outside air processing device 100. can be kept.

Therefore, according to the outside air processing apparatus 100 and the air conditioning system according to this embodiment, it is possible to reliably control the pressure to positive or negative pressure without using a differential pressure sensor.

The calculation function 51 in the above embodiment is an example of a calculation unit in the claims. Similarly, the motor control function 52 in the embodiment is an example of a control unit in the claims. The fan motor 4 in the embodiment is an example of a motor in the claims. The remote control 6 in the embodiment is an example of an input unit in the claims.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention as well as within the scope of the invention described in the claims and its equivalents.

DESCRIPTION OF SYMBOLS 100...Outdoor air processing device, 1...Indoor unit, 2...Outdoor unit, 4...Fan motor, 5...Controller, 6...Remote control, 7...Detection part, 51...Calculation function, 52...Motor control function, 53...Memory

Claims (5)

A motor that drives a fan;
a detection unit that detects the electric power amount and rotation speed of the motor;
an input section operable by a user that accepts input of a target air volume;
a calculation unit that calculates a current air volume based on the electric power amount and rotation speed of the motor detected by the detection unit;
a control unit that controls the motor so that the air volume becomes the target air volume based on the current air volume;
has
The arithmetic unit selects one of at least two different equations that are used depending on the rotational speed of the motor and calculates the current air volume using the electric energy and the rotational speed of the motor as variables. calculating the current air volume by inputting the electric power amount and rotation speed of the motor obtained by the detection unit into a formula corresponding to the rotation speed;
Outside air processing equipment. The detection unit detects the power amount and rotation speed of the motor at predetermined intervals,
The calculation unit calculates the current air volume from the electric energy and rotation speed of the motor obtained at predetermined intervals from the detection unit, and calculates an average current air volume by averaging a plurality of calculated current air volumes. ,
The control unit controls the motor based on the average current air volume.
The outside air processing device according to claim 1 . The outside air processing device according to claim 1 or 2 , wherein the input section is provided in a remote control device and further allows input of a set indoor temperature. The outside air processing device according to any one of claims 1 to 3 ,
It is provided in the room into which outside air is introduced by this outside air processing device, and is equipped with an exhaust device that exhausts indoor air to the outside.
An air conditioning system characterized in that an air volume larger than the rated air volume of the exhaust device is set as the target air volume in the input section, and the indoor air pressure is made positive. The outside air processing device according to any one of claims 1 to 3 ,
It is provided in the room into which the outside air is introduced by this outside air processing device, and is equipped with an exhaust device that exhausts the indoor air to the outside.
An air conditioning system characterized in that an air volume lower than the rated air volume of the exhaust device is set as the target air volume in the input section, thereby creating a negative pressure in the room.

Images