JP2945832B2 - Duct type simultaneous supply and discharge equipment - Google Patents

Abstract

PURPOSE:To provide a duct type pumping apparatus wherein there can be detected an abnormal change in duct system pressure loss due to external factors such as an air amount, filter clogging, and foreign matter's mixing into the duct without the use of a particular sensor and it is inexpensive and high performance. CONSTITUTION:There are provided air supply side air amount estimation means 21 for estimating a supply air amount on the basis of the number of revolutions and voltage of an air supply side fan 1, supply air amount control means 22, air supply side static pressure estimation means 16 for estimating air supply side static pressure, exhaust side air amount estimation means 23 for estimating an exhaust air amount, exhaust air amount control means 24, and exhaust side static pressure estimation means 17 for estimating exhaust side static pressure. A duct type simultaneous pumping apparatus further includes pumping pressure loss increase informing means 18 which compares estimated air supply side static pressure and maximum static pressure stored in air supply side maximum static pressure memory means 25 to detect any failure of an air supply system duct system, and further compares estimated exhaust side static pressure and maximum static pressure stored in exhaust side maximum static pressure memory means 26 to detect any failure of an exhaust system duct system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct type simultaneous supply / discharge device having an air supply blower for supplying outdoor air to a room and an exhaust air blower for discharging room air to the outside of the room.

[0002]

2. Description of the Related Art In recent years, the airtightness of houses has been increasing in order to maintain a comfortable indoor thermal environment. In a simultaneous supply / exhaust type air conditioner, the condition of a duct, the condition of a living room, and the outdoor Therefore, there is a demand for a duct-type simultaneous supply / discharge device capable of supplying and exhausting air at an optimal flow rate according to the situation.

Conventionally, this type of duct-type simultaneous supply / discharge device has
A configuration as shown in Japanese Patent Application Laid-Open No. 4-2977741 was common. Hereinafter, the configuration will be described with reference to FIG.

[0004] As shown in the figure, reference numeral 51 denotes an air supply blower for supplying fresh outdoor air outside the room to the room through an outside air duct 62, an outside air intake port 58, and an outside air air filter 56.
Reference numeral 2 denotes an exhaust blower for discharging dirty air in the room through a return air duct 64, a return air intake port 60, and a return air filter 57 to the outside of the room. Reference numeral 53 denotes a heat exchange between the discharged air discharged outside the room and the outside air supplied to the room. 54 is a heat exchanger for heating or cooling the outside air heat-exchanged in the total heat exchanger 53, 55 is a humidifier, 59 is a supply air outlet, and a supply air duct 63 is provided. Reference numeral 61 denotes an exhaust outlet, which connects the exhaust duct 65. Reference numeral 66 denotes a supply air flow sensor for detecting the supply air flow. The supply air flow control means 68 controls the target supply air flow of the air supply blower based on a signal from the supply air flow sensor 66. Reference numeral 67 denotes an exhaust air volume sensor for detecting an exhaust air volume.
The exhaust air volume control means 69 controls the target exhaust air volume of the exhaust blower from the signal 7.

In the above configuration, fresh outdoor air outside the room is sucked through the outside air duct 62 from the outside air intake 58, dust and dust are removed by the outside air filter 56, and heat is exchanged with room air by the total heat exchanger 53. Later, the heat exchanger 54
And then humidified by the humidifier 55 and supplied to the room through the air supply outlet 59 and the air supply duct 63. Also, the indoor air passes through the return air duct 64,
After being sucked in from the return air intake 60, dust and dust are removed by the return air filter 57, and heat is exchanged with outdoor air by the total heat exchanger 53, the air is discharged outside through the exhaust outlet 61 and the exhaust duct 65. Is done. At this time, the supply air volume is detected by the supply air volume sensor 66, and the supply air volume detection means 6
6a, and is converted into an electric signal.
Thereby, the air supply blower driving means 68a is controlled so that the target air supply amount corresponds to the air conditioning load. On the other hand, the exhaust air volume is detected by an exhaust air volume sensor 67 and is converted into an electric signal by an exhaust air volume detecting unit 67a.
9 so that the exhaust blower driving means 6 has a target exhaust air volume determined to be a fixed ratio with respect to the target supply air volume.
9a.

[0006]

In such a conventional duct type simultaneous supply / discharge device, a special air flow sensor is required to detect the air flow, so that the structure becomes complicated and the cost increases. there were. In addition, since the target air volume is controlled even when the air volume is reduced due to the air conditioning load or air filter clogging, clogging of the outside air filter and return air filter, foreign matter in the outside air duct, air supply duct, return air duct, and exhaust duct are prevented. There is a problem that the user does not notice that the pressure loss of the air supply duct system or the exhaust duct system has increased compared to the initial construction due to external factors such as mixing of air. In addition, pressure loss of the air supply duct system or the exhaust duct system is reduced compared to the initial construction due to external factors such as displacement of the fitting part of the outside air duct, supply air duct, return air duct, exhaust duct, and damage due to corrosion. There is a problem that the user does not notice that there is. In addition, when the pressure loss is significantly increased, the air volume is controlled beyond the capacity of the motor, so that there is a problem that the equipment is damaged. Also,
If the pressure loss increases significantly and exceeds the capacity of the motor and the amount of supply air is insufficient, the indoor pressure will be negative, and if the amount of exhaust is insufficient, the indoor pressure will be positive, making opening and closing the door difficult. Or cold drafts.

[0007] The present invention solves the above-mentioned problems, and detects the air flow without using a special sensor such as an air flow sensor, so that an air supply duct due to an external factor such as clogging of a filter or entry of foreign matter into the duct. A first object is to notify a user of an increase in pressure loss in the system and the exhaust duct system.

A second object is to notify a user of a decrease in pressure loss in an air supply duct system or an exhaust duct system due to an external factor such as displacement of a duct fitting portion.

A third object of the present invention is to suppress the control exceeding the capability of the motor due to a remarkable increase in pressure loss, and to suppress the indoor pressure from becoming negative or positive.

[0010]

In order to achieve the first object, the duct type simultaneous supply / discharge device of the present invention is arranged such that the first means supplies outdoor air taken from an outdoor air suction port to the indoor side. Supply air blower equipped with a DC motor for the air supply, a heat exchanger for humidifying and cooling the supply air supplied by the supply air blower, a humidifier for humidifying the supply air, and indoor air An exhaust-side blower equipped with a DC motor for discharging indoor air taken in through an inlet to the outside, a total heat exchanger for performing heat exchange between outdoor air and indoor air, and a supply-side blower. Air supply side air flow amount calculating means for calculating the operation air amount of the air supply side blower from the operation speed of the DC motor and the voltage applied to the DC motor, and air supply amount control for controlling the operation air amount of the air supply side blower to a predetermined air amount Means and the air supply side blower Supply-side static pressure calculation means for calculating the static pressure applied to the supply-side blower from the operating speed of the C motor and the voltage applied to the DC motor, and supply-side maximum for storing the maximum static pressure of the supply-side duct system Static pressure storage means; exhaust-side air flow rate calculating means for calculating the operating air-flow rate of the exhaust-side blower from the operating speed of the DC motor of the exhaust-side blower and the voltage applied to the DC motor; Exhaust air volume control means for controlling the air volume, exhaust-side static pressure calculation means for calculating the static pressure applied to the exhaust-side blower from the operating speed of the DC motor of the exhaust-side blower and the voltage applied to the DC motor, and exhaust-side duct Exhaust-side maximum static-pressure storage means for storing the maximum static pressure of the system, and control of the operation of the air supply-side blower and the exhaust-side blower, and the air supply-side static pressure calculated by the air supply-side static pressure calculation means Is the maximum static pressure memory hand on the air supply side. When a predetermined static pressure a or more stored in the exhaust-side static pressure a is detected, an increase in pressure loss of the supply-side duct system is notified, and the exhaust-side static pressure obtained by the exhaust-side static pressure calculation means is stored in the exhaust-side maximum static pressure storage. When a static pressure b or more stored in the means is detected, a duct-type simultaneous supply / discharge device is provided which includes supply / discharge pressure loss increase notification means for notifying an increase in pressure loss of the exhaust-side duct system.

The second means includes an air supply-side blower equipped with a DC motor for supplying outdoor air taken in from the outdoor air suction port to the indoor side, and a supply air supplied by the air supply-side blower. A heat exchanger for humidifying and cooling,
A humidifier for humidifying the supply air, and a D for discharging indoor air taken in from the indoor air inlet to the outside of the room.
An exhaust-side blower equipped with a C-motor, a total heat exchanger for exchanging heat between outdoor air and indoor air, and a supply fan based on the operating speed of the DC motor of the supply-side blower and the voltage applied to the DC motor. Supply-side air volume calculation means for calculating the operation air volume of the air-side blower, supply air volume control means for controlling the operation air volume of the air-supply side blower to a predetermined air volume, and the operating speed of the DC motor of the exhaust-side blower. Exhaust air volume calculating means for calculating the operating air volume of the exhaust fan from the voltage applied to the DC motor, exhaust air volume controlling means for controlling the operating air volume of the exhaust fan to a predetermined air volume, and the DC motor of the air supply fan When it is attempted to control the applied voltage to a predetermined voltage c or more, it is notified that the capacity of the air supply side blower has been exceeded, and the applied voltage to the DC motor of the exhaust side blower is controlled to a predetermined voltage d or more. And when And supply and discharge blower function force over notification means ducted same hourly discharge devices formed by arranging a structure for informing that exceeded the capacity of the exhaust blower.

Further, in order to achieve the second object, the third
Means is a supply-side minimum static pressure storage means for storing the minimum static pressure of the supply-side duct system, an exhaust-side minimum static pressure storage means for storing the minimum static pressure of the exhaust-side duct system, and a supply-side static pressure. When the supply-side static pressure calculated by the calculating means is detected to be equal to or less than a predetermined static pressure e, an airtight abnormality of the supply-side duct system is notified, and the exhaust-side static pressure calculated by the exhaust-side static pressure calculating means is determined by the predetermined static pressure. A duct-type simultaneous supply / discharge device including an air supply / exhaust airtightness abnormality notification means for notifying an airtightness abnormality of the exhaust side duct system when the pressure f or less is detected.

Further, in order to achieve the third object, the fourth object
Means for detecting when the supply-side static pressure calculated by the supply-side static pressure calculation means is equal to or greater than a predetermined static pressure g, reduces the exhaust air volume of the exhaust-side blower, and according to the exhaust air volume, A static pressure detection indoor negative pressure suppression control means for controlling the supply air flow rate of the air to prevent the indoor pressure from becoming negative pressure, and the exhaust-side static pressure obtained by the exhaust-side static pressure calculation means is equal to or greater than a predetermined static pressure h. When the air pressure is detected, the air flow rate of the air supply side blower is reduced, and the exhaust air flow rate of the exhaust side blower is controlled in accordance with the air flow rate. A duct type simultaneous supply / discharge device including pressure suppression control means is provided.

The fifth means reduces the amount of exhaust air from the exhaust side fan when the voltage applied to the DC motor of the air supply side blower is controlled to be equal to or higher than the predetermined voltage i. A voltage detection indoor negative pressure suppression control means for controlling the amount of air supplied to the air-side blower to prevent the indoor pressure from becoming negative, and a voltage applied to the DC motor of the exhaust-side blower to be equal to or higher than a predetermined voltage j. When this is set, the supply air volume of the air supply side blower is reduced, and the exhaust air volume of the exhaust side air blower is controlled in accordance with this air supply volume to suppress the indoor pressure from becoming a positive pressure. A duct-type simultaneous supply / discharge device provided with control means is provided.

[0015]

According to the first aspect of the present invention, the supply air volume calculation means calculates the supply air volume from the operating speed of the DC motor mounted on the air supply blower and the voltage applied to the DC motor. And the static pressure applied to the air supply-side blower is calculated by the air supply-side static pressure calculation means, and the static pressure obtained by this calculation and the predetermined static pressure a stored in the air supply-side maximum static pressure storage means are calculated. And the static pressure obtained by calculation is stored in advance as a predetermined static pressure a.
When the above is detected, an increase in pressure loss, such as clogging of the filter on the air supply side or entry of foreign matter into the air supply system duct, is detected, and the means for increasing the supply / discharge pressure loss informs the user of the air supply system duct. Pressure loss increase alarm is issued, and the exhaust air volume is calculated by the exhaust air volume calculating means from the operating speed of the DC motor mounted on the exhaust blower and the voltage applied to the DC motor, and the exhaust static pressure calculating means is used. The static pressure applied to the exhaust-side blower is calculated by calculation, and the static pressure obtained by this calculation is compared with the predetermined static pressure b stored in the exhaust-side maximum static pressure storage means. When a predetermined static pressure b or more stored in advance is detected, an increase in pressure loss, such as clogging of the filter on the exhaust side and entry of foreign matter into the exhaust duct, is detected. It can be to use user Te increases pressure loss of the exhaust system ducts raise an alarm.

Further, when the voltage applied to the DC motor mounted on the air supply-side blower is controlled to be equal to or higher than the predetermined voltage c by the configuration of the second means, the air supply / discharge air function over-power notifying means turns on the air supply-side blower. A warning is issued to the user that the capacity has been exceeded, and when the voltage applied to the DC motor mounted on the exhaust-side blower is to be controlled to be equal to or higher than a predetermined voltage d, the supply-discharge / air-blowing function over-informing means is switched to the exhaust-side blower. Alarm can be issued to the user that the capacity of the user has been exceeded.

Further, the static pressure applied to the air supply side blower by the air supply side static pressure calculating means based on the operating speed of the DC motor mounted on the air supply side blower and the voltage applied to the DC motor by the configuration of the third means. Is calculated, and the static pressure obtained by the calculation is compared with the stored minimum static pressure e. When the static pressure obtained by the calculation is detected to be equal to or less than the previously stored minimum static pressure e, the air supply / exhaust is performed. The dense abnormality notification means issues a warning to the user to decrease the pressure loss of the air supply duct due to external factors such as a displacement of the air supply duct fitting part, and the operating speed of the DC motor mounted on the exhaust side blower. The static pressure applied to the exhaust-side blower is calculated by the exhaust-side static pressure calculating means from the voltage applied to the DC motor, and the calculated static pressure is compared with the minimum static pressure f. The static pressure When the detected value is equal to or less than the stored minimum static pressure f, the air supply / exhaust airtightness abnormality notification means issues a warning to the user about a decrease in pressure loss of the exhaust duct due to an external factor such as a displacement of the exhaust duct duct fitting portion. be able to.

Further, when the supply-side static pressure calculated by the supply-side static pressure calculation means detects a predetermined static pressure g or more by the configuration of the fourth means, the static-pressure detection chamber negative pressure suppression control means sets the exhaust pressure. The exhaust air flow rate of the side blower is reduced, and the air flow rate of the air supply side blower is controlled in accordance with the exhaust air flow rate so that the indoor pressure can be prevented from becoming negative. When the detected exhaust-side static pressure detects a predetermined static pressure h or more,
The static pressure detection room positive pressure suppression control means reduces the supply air volume of the air supply side blower, controls the exhaust air volume of the exhaust side blower according to the air supply amount, and suppresses the indoor pressure from becoming a positive pressure. be able to.

Further, when the voltage applied to the DC motor of the air supply side blower is controlled to be equal to or higher than the predetermined voltage i by the configuration of the fifth means, the negative pressure suppression control means for the voltage detection room uses the exhaust air volume of the exhaust side blower. The amount of air supplied to the air supply-side blower is controlled in accordance with the amount of exhaust air to suppress the indoor pressure from becoming negative, and the voltage applied to the DC motor of the exhaust-side blower is reduced to a predetermined voltage. When trying to control more than j,
The voltage detection room positive pressure suppression control means reduces the supply air volume of the air supply side blower, controls the exhaust air volume of the exhaust side blower in accordance with the supply air volume, and suppresses the indoor pressure from becoming a positive pressure. Can be.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

As shown in the drawing, 1 is an air supply-side blower equipped with a DC motor 19, 2 is an exhaust-side blower equipped with a DC motor 20, 3 is exhaust air discharged outside the room, and 3 is outside air supplied to the room. 4 is a heat exchanger for heating or cooling the outside air heat-exchanged by the total heat exchanger 3, 5 is a humidifier, 9 is a supply air outlet, and air supply. A duct 13 is connected, 11 is an exhaust outlet, and an exhaust duct 15 is connected. 12 is an outside air duct, and an outside air intake 8 is provided.
6 is an outside air filter, 14 is a return air duct connected to the return air intake 10, 7 is a return air filter, and 27 is a power supply to the stator windings depending on the rotor position of the DC motor 19. Is a DC motor drive control means for controlling the air supply, and 28 is a DC motor drive control means for controlling the energization to the stator windings according to the rotor position of the DC motor 20, and 21 is the DC of the air supply blower 1. An air supply side air flow amount calculating means for calculating an operation air amount of the air supply side blower 1 from an operation rotation speed of the motor 19 and a voltage applied to the DC motor 19, and a supply air amount 22 for controlling the operation air amount of the air supply side blower to a predetermined air amount. 29 is an air flow control means, and 29 is a supply air flow control means 22.
Is a supply voltage control means for controlling the applied voltage to the DC motor 19 from the signal of the air blower. Reference numeral 23 denotes the operation of the exhaust blower 2 based on the operating speed of the DC motor 20 of the exhaust blower 2 and the applied voltage to the DC motor 20. Exhaust-side air volume calculation means for calculating the air volume, 24 is an exhaust air volume control means for controlling the operating air volume of the exhaust-side blower to a predetermined air volume, and 30 controls the voltage applied to the DC motor 20 from the signal of the exhaust air volume control means 24. Reference numeral 16 denotes an air supply side static pressure calculating means for calculating the static pressure applied to the air supply side blower 1 from the operation speed of the air supply side blower 1 and the voltage applied to the DC motor 19. Is a supply-side maximum static pressure storage unit that stores the maximum static pressure at each supply air volume in a memory table as a matrix.
Is an exhaust-side static pressure calculating means for calculating the static pressure applied to the exhaust-side blower 2 from the operating speed of the exhaust-side blower 2 and the voltage applied to the DC motor 20, and 26 is a memory which stores the maximum static pressure at each exhaust air volume as a matrix. The exhaust-side maximum static pressure storage means stored in the table is a supply-discharge pressure loss increase notifying means 18 for notifying an increase in pressure loss of the supply-side duct system and the exhaust-side duct system.

In the above construction, fresh outdoor air is sucked from the outdoor air intake 8 through the outdoor air duct 12, dust and dust are removed by the outdoor air filter 6, and heat is exchanged with indoor air by the total heat exchanger 3. Thereafter, the air is heated or cooled by the heat exchanger 4, humidified by the humidifier 5, and supplied to the room through the air supply outlet 9 and the air supply duct 13. Further, the indoor air is sucked from the return air intake 10 through the return air duct 14, dust and dust are removed by the return air filter 7, heat exchange with the outdoor air is performed by the total heat exchanger 3, and then the exhaust air outlet is provided. 11 and the exhaust air is discharged outside the room through the exhaust duct 15, and the supply air volume is calculated by an air supply side air volume calculation means 21.
As a result, the operating speed of the DC motor 19 mounted on the air supply-side blower 1 obtained from the switching speed of the current supply to the winding of the air supply-side DC motor drive control means 27 and the DC motor 19
From the applied voltage to the DC motor 19, the torque constant, the induced voltage constant, the armature resistance and the pressure proportional constant and the air flow proportional constant determined by the similarity rule in general fluid.
It is calculated by utilizing the fact that the shaft power of the air supply side blower 1 and the output of the DC motor 19 are equal, and the air supply air volume is controlled by the air supply volume control means 22 so that the supply air volume is larger than the target air volume. It is determined whether the air conditioner is operated with a small air volume or not, and the air supply side voltage control means 29 responds to the air conditioning load by decreasing the pressure if operating with a large air volume and increasing the pressure if operating with a small air volume. It is controlled to the target supply air volume. On the other hand, the exhaust air volume is calculated by the exhaust air volume calculation means 23 from the operating speed of the DC motor 20 mounted on the exhaust blower 2 and the DC motor 20 which is obtained from the switching speed of energization to the winding of the exhaust DC motor drive control means 28. The exhaust air volume control is similarly calculated from the applied voltage to the DC motor 20 and the torque constant, the induced voltage constant, the armature resistance, and the pressure proportional constant and the air volume proportional constant determined by the similarity rule in general fluid. Means 2
4 and the exhaust side voltage control means 30, the DC motor 2
By varying the applied voltage to 0, the target exhaust air volume is similarly controlled. At this time, the supply-side static pressure calculating means 16
The operating speed of the DC motor 19 mounted on the air supply-side blower 1, the voltage applied to the DC motor 19, and the characteristic of the DC motor 19 are obtained from the switching speed of the current supply to the winding of the air supply-side DC motor drive control means 27. A torque constant that is a constant,
Based on the induced voltage constant, the armature resistance, and the pressure proportional constant and the air flow proportional constant determined by the similarity rule for general fluids, the fact that the output of the DC motor 19 is equal to the shaft power of the supply-side blower 1 is used. Is calculated. The supply / discharge pressure loss increase notification means 18 calculates the supply-side static pressure obtained by the calculation and the supply-duct maximum static pressure at the operating supply air volume stored in the supply-side maximum static pressure storage means 25 in advance. Compare. As a result of the comparison, if the static pressure obtained by the calculation is large, the initial pressure may be increased due to external factors such as clogging of the outside air air filter 6 and entry of foreign matter into the air supply duct such as the outside air duct 12 and the air supply duct 13. It judges that the pressure loss of the air supply duct system has increased abnormally compared to the time of construction, and issues a warning to the user. Also, the exhaust-side static pressure calculating means 1
Reference numeral 7 denotes an operation speed of the DC motor 20 mounted on the exhaust-side blower 2, a voltage applied to the DC motor 20, and a unique constant of the DC motor 20, obtained from a switching speed of energization to the winding of the exhaust-side DC motor drive control means 28. From the torque constant, the induced voltage constant, the armature resistance and the pressure proportional constant / air flow proportional constant determined by the similarity rule in general fluid, the exhaust is performed by using the fact that the shaft power of the exhaust-side blower 2 and the output of the DC motor 20 are equal. The static pressure applied to the side blower 2 is calculated. Then, the supply / discharge pressure loss increase notification means 18 compares the exhaust-side static pressure obtained by the calculation with the exhaust-duct-system maximum static pressure at the operating exhaust air volume stored in the exhaust-side maximum static pressure storage means 26 in advance. As a result of the comparison, if the static pressure obtained by the calculation is large, due to external factors such as clogging of the return air filter 7 and entry of foreign matter into the exhaust duct such as the return air duct 14 and the exhaust duct 15, It judges that the pressure loss of the exhaust duct system has increased abnormally compared to the initial construction, and issues a warning to the user.

As described above, according to the duct type simultaneous supply / discharge device of the first embodiment of the present invention, the operation speed of the DC motor 19 mounted on the air supply-side blower 1 and the voltage applied to the DC motor 19 are determined. The air supply side air flow amount calculating means 21 for obtaining the air supply air amount by calculation, the air supply air amount control means 22, the operating speed of the DC motor 20 mounted on the exhaust side blower 2, and the DC motor 2
By providing the exhaust-side air volume calculation means 23 and the exhaust air volume control means 24 for calculating the exhaust air volume from the applied voltage to 0 by calculation, it is possible to detect and control the supply air volume and the exhaust air volume without using a special sensor, The operation speed of the DC motor 19 mounted on the air supply side blower 1 and the DC motor 19
Supply pressure static pressure calculation means 16 for calculating the static pressure applied to the supply-side blower 1 from the voltage applied to the supply-side blower 1, the operating speed of the DC motor 20 mounted on the exhaust-side blower 2, The exhaust-side static pressure calculating means 17 for calculating the static pressure applied to the exhaust-side blower 2 from the applied voltage and the static pressure calculated by the supply-side static pressure calculating means 16 and the supply-side maximum static pressure storing means 25 are stored. Compares with the stored maximum static pressure and detects an increase in pressure loss, such as clogging of the filter on the air supply side or the entry of foreign matter into the air supply duct, and issues an alarm for pressure loss increase in the air supply duct. Comparing the static pressure obtained by the exhaust-side static pressure calculating means 17 with the maximum static pressure stored in the exhaust-side maximum static pressure storage means 26, and clogging of the exhaust-side filter and foreign matter entering the exhaust duct. The exhaust system detects an increase in pressure loss due to By providing the supply / exhaust pressure loss increase notification means 18 for issuing a warning of an increase in the pressure loss of the air duct, the user can investigate the cause of the increase in the pressure loss of the air supply duct and the exhaust duct and take countermeasures. Disaster can be prevented beforehand.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in the figure, when the supply air volume control means 22 controls the supply voltage control means 29 to control the voltage applied to the DC motor 19 to a predetermined voltage c or more, the supply air flow control means 22 Notifying that the capacity of the blower 1 has been exceeded, the exhaust air volume control unit 24 sends a D
When the voltage applied to the C motor 20 is controlled to be equal to or higher than the predetermined voltage d, a supply / discharge fan function over notification unit 31 for notifying that the capacity of the exhaust side fan 2 has been exceeded is provided. The configuration is the same as that of the embodiment.

In the above configuration, fresh outdoor air outside the room is sucked in from the outside air intake 8 through the outside air duct 12, dust and dust are removed by the outside air filter 6, and heat is exchanged with room air by the total heat exchanger 3. Then, it is heated or cooled by the heat exchanger 4, humidified by the humidifier 5, and supplied to the room through the air supply outlet 9 and the air supply duct 13,
Further, the indoor air is sucked from the return air intake 10 through the return air duct 14, dust and dust are removed by the return air filter 7, heat exchange with the outdoor air is performed by the total heat exchanger 3, and then the exhaust air outlet is provided. The supply air flow is discharged outside through the air duct 11 and the exhaust duct 15, and the supply air flow is calculated by the supply air flow calculation means 21 from the supply switching speed of the winding of the supply DC motor drive control means 27. From the operating speed, applied voltage, torque constant, induced voltage constant, armature resistance and pressure proportional constant / air flow proportional constant determined by the similarity rule for general fluids, the air blower 1 It is calculated by utilizing the fact that the shaft power and the output of the DC motor 19 are equal, and the supply air volume control means 22 operates the supply air volume at a larger air volume than the target air volume. It is determined whether the air conditioner is operated with a small air volume or not. The air supply side voltage control means 29 responds to the air conditioning load by decreasing the pressure when operating with a large air volume and increasing the pressure when operating with a small air volume. Is controlled to the target air supply flow rate. On the other hand, the exhaust air volume is calculated by the exhaust DC motor drive control
The operating speed and applied voltage of the exhaust-side blower 2 obtained from the switching speed of energization to the windings, and the pressure determined by the torque constant, the induced voltage constant, the armature resistance, and the similarity rule in the general fluid, which are the intrinsic constants of the DC motor 20. Proportional constant
Similarly, the target exhaust air volume is similarly obtained by calculation from the air volume proportional constant, and is varied by applying a voltage to the DC motor 20 by the exhaust air volume control means 24 and the exhaust-side voltage control means 30. At this time, the supply air volume control means 22 sends a D
When the voltage applied to the C motor 19 is controlled to be equal to or higher than the predetermined voltage c, the air supply / exhaust air blowing function power informing means 31 notifies the user that the capacity of the air supply side air blower 1 has been exceeded, and the exhaust air volume. The control means 24 is the exhaust-side voltage control means 30
In contrast, when the voltage applied to the DC motor 20 is controlled to be equal to or higher than the predetermined voltage d, the user is notified that the capacity of the exhaust-side blower 2 has been exceeded.

As described above, according to the duct-type simultaneous supply / discharge device of the second embodiment of the present invention, when the voltage applied to the DC motor 19 of the air supply side blower 1 is controlled to a predetermined voltage c or more, When the user is notified that the capacity of the air supply-side blower 1 has been exceeded, and the voltage applied to the DC motor 20 of the exhaust-side blower 2 is controlled to be equal to or higher than the predetermined voltage d, the capacity of the exhaust-side blower 2 is increased. The air supply / exhaust air flow function over-informing means 31 for notifying the user that the air pressure has exceeded the limit value is provided, so that the filter on the air supply side is clogged, foreign matter is mixed into the air supply system duct, and the like. The air supply amount control exceeding the capacity of the blower 1 is detected, and the supply / discharge air function over-notification means 31 notifies the user that the capacity of the air supply-side blower 1 has been exceeded to the user. Clogging of side filter, exhaust Exhaust air volume control exceeding the capacity of the exhaust-side blower 2 is detected due to the entry of foreign matter into the duct, etc., and the supply / exhaust-air function over-notification means 31 instructs the user to exceed the capacity of the exhaust-side blower 2. Is notified to the user, the user can investigate the cause of the increase in the pressure loss of the air supply duct and the exhaust duct and take countermeasures, and can prevent a disaster such as a duct fire from occurring.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in the figure, reference numeral 32 denotes a supply-side minimum static pressure storing means for storing the minimum static pressure of the supply-side duct system, and 33, an exhaust-side minimum static pressure storage means for storing the minimum static pressure of the exhaust-side duct system. When the pressure storage means detects that the supply-side static pressure calculated by the supply-side static pressure calculation means 16 is equal to or less than the predetermined static pressure e, the air-pressure abnormality of the supply-side duct system is notified, and the exhaust-side static pressure calculation means is provided. When the exhaust-side static pressure obtained by step 17 is equal to or less than a predetermined static pressure f,
An air supply / exhaust airtightness abnormality informing means 34 for informing the airtightness abnormality of the exhaust side duct system is provided, and the other structure is the same as that of the first embodiment.

In the above configuration, fresh outdoor air outside the room is sucked from the outside air intake 8 through the outside air duct 12, dust and dust are removed by the outside air filter 6, and heat is exchanged with the room air by the total heat exchanger 3. Then, it is heated or cooled by the heat exchanger 4, humidified by the humidifier 5, and supplied to the room through the air supply outlet 9 and the air supply duct 13,
The room air passes through the return air duct 14 and returns to the air intake 1
The air is sucked in from 0, the dust and dust are removed by the return air filter 7, heat exchange with outdoor air is performed by the total heat exchanger 3, and then discharged outside through the exhaust outlet 11 and the exhaust duct 15. The air flow is calculated by the air supply side air flow amount calculating means 21 from the air supply side blower 1 obtained from the switching speed of the current supply to the winding of the air supply side DC motor drive control means 27.
From the rotational speed of the C motor 19, the applied voltage to the DC motor 19, the torque constant, the induced voltage constant, the armature resistance and the pressure proportional constant and air flow proportional constant determined from the similarity rule in general fluids, which are the intrinsic constants of the DC motor 19. Is calculated by utilizing the fact that the shaft power of the air supply-side blower 1 is equal to the output of the DC motor 19, and the air supply air amount is controlled by the air supply amount control means 22 so that the air supply amount is larger than the target air amount. Or is operating with low airflow,
The air supply side voltage control means 29 controls the air supply load to a target air supply flow rate corresponding to the air conditioning load by decreasing the pressure when operating with a large air flow rate and increasing the pressure when operating with a small air flow rate. On the other hand, the exhaust air volume is calculated by the exhaust air volume calculating means 23 from the switching speed of energization to the winding of the exhaust DC motor drive control means 28, the operating speed of the exhaust blower 2, the applied voltage, and the intrinsic constant of the DC motor 20. The exhaust air volume control means 2 is similarly calculated from the torque constant, the induced voltage constant, the armature resistance and the pressure proportional constant / air volume proportional constant determined by the similarity rule in general fluids.
4 and the exhaust side voltage control means 30, the DC motor 2
By varying the applied voltage to 0, the target exhaust air volume is similarly controlled. At this time, the supply-side static pressure calculating means 16
Is based on the operating speed of the DC motor 19 mounted on the air supply-side blower 1, the applied voltage to the DC motor 19, the torque constant which is an intrinsic constant of the DC motor 19, the induced voltage constant, the armature resistance, and the similarity rule in general fluid. Determined pressure proportional constant
The static pressure applied to the air supply side blower 1 is calculated from the air volume proportionality constant by utilizing the fact that the shaft power of the air supply blower 1 and the output of the DC motor 19 are equal. Then, the supply / exhaust airtightness abnormality notification means 3
Reference numeral 4 compares the air supply-side static pressure obtained by the calculation with the air supply duct system minimum static pressure at the operating air supply air volume stored in the air supply-side minimum static pressure storage means 33 in advance. As a result of the comparison,
If the static pressure obtained by the calculation is small, the outside air duct, the outside air filter 6 may be disconnected, the outside air duct 12, the supply duct 1
It is determined that the pressure loss of the air supply duct system is abnormally reduced compared to the initial construction due to external factors such as displacement of the air supply system duct fitting part, damage due to corrosion, etc., and an alarm is issued to the user. . In addition, the exhaust-side static pressure calculating means 17 includes an operating speed of the DC motor 20 mounted on the exhaust-side blower 2, a voltage applied to the DC motor 20, a torque constant, an intrinsic constant of the DC motor 20, an induced voltage constant, and an armature. The static pressure applied to the exhaust-side blower 2 is calculated from the pressure proportional constant and the air flow proportional constant determined by the resistance and the similarity rule for general fluids by utilizing the fact that the shaft power of the exhaust blower 2 and the output of the DC motor 20 are equal. Then, the supply / exhaust airtightness abnormality notification means 34 compares the exhaust-side static pressure obtained by the calculation with the exhaust-duct-system minimum static pressure at the operating exhaust air volume stored in the exhaust-side minimum static pressure storage means 34 in advance. As a result of the comparison, if the static pressure obtained by the calculation is small, external factors such as displacement of the return air filter 7, displacement of the fitting portion of the exhaust system duct such as the return air duct 14, exhaust gas duct 15, and damage due to corrosion. Thereby, it is determined that the pressure loss of the exhaust duct system is abnormally reduced as compared with the initial construction, and a warning is issued to the user.

As described above, according to the duct type simultaneous supply / discharge device of the third embodiment of the present invention, the operation speed of the DC motor 19 of the air supply side blower 1 and the voltage applied to the DC motor 19 are
Supply-side static pressure calculating means 16 for calculating a static pressure applied to the supply-side blower 1 by calculation, and a DC motor 20 of the exhaust-side blower 2
The static pressure calculated by the exhaust-side static pressure calculating means 17 for calculating the static pressure applied to the exhaust-side blower 2 from the applied rotation speed of the DC motor 20 and the static pressure By comparing with the minimum static pressure stored in the supply-side minimum static pressure storage means 32, an abnormal decrease in pressure loss such as disconnection of the filter on the supply side or breakage of the supply duct is detected. An alarm for abnormally reduced pressure loss in the system duct is issued, and the static pressure obtained by the exhaust-side static pressure calculating means 17 is compared with the minimum static pressure stored in the exhaust-side minimum static pressure storage means 33, and the calculated value is obtained by calculation. When the static pressure is less than the pre-stored minimum static pressure, an abnormal decrease in pressure loss such as disconnection of the filter on the exhaust side or breakage of the exhaust system duct is detected, and an alarm for abnormally low pressure loss in the exhaust system duct is issued. Notification of air supply / exhaust airtightness abnormality By providing a step 34, the user can perform the cause investigation and measures of pressure loss abnormal reduction of the air supply system ducts and exhaust system duct, the damage to the building by duct damage, or the like can be prevented.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in FIG. 3, when the supply-side static pressure calculated by the supply-side static pressure calculation means 16 is equal to or greater than a predetermined static pressure g, the exhaust air amount of the exhaust-side blower 2 is reduced.
A static pressure detection indoor negative pressure suppression control means for controlling the supply air flow of the air supply side blower 1 in accordance with the exhaust air flow and suppressing the indoor pressure from becoming negative pressure. When the exhaust-side static pressure obtained by the above is detected to be equal to or more than the predetermined static pressure h, the supply air flow of the supply-side blower 1 is reduced, and the exhaust air flow of the exhaust-side blower 2 is controlled in accordance with the supply air flow, This is a static pressure detection room positive pressure suppression control means for suppressing the indoor pressure from becoming a positive pressure, and the other configuration is the same as the configuration of the first embodiment.

In the above configuration, fresh outdoor air outside is taken in from the outside air intake 8 through the outside air duct 12, dust and dust are removed by the outside air filter 6, and heat is exchanged with room air by the total heat exchanger 3. Then, it is heated or cooled by the heat exchanger 4, humidified by the humidifier 5, and supplied to the room through the air supply outlet 9 and the air supply duct 13,
Further, the indoor air is sucked from the return air intake 10 through the return air duct 14, dust and dust are removed by the return air filter 7, heat exchange with the outdoor air is performed by the total heat exchanger 3, and then the exhaust air outlet is provided. The supply air flow is discharged outside through the air duct 11 and the exhaust duct 15, and the supply air flow is calculated by the supply air flow calculation means 21 from the supply switching speed of the winding of the supply DC motor drive control means 27. 1, the operating speed of the DC motor 19, the applied voltage to the DC motor 19, the torque constant which is an intrinsic constant of the DC motor 19, the induced voltage constant, the armature resistance and the pressure proportional constant determined from the similarity rule in general fluids. From the air volume proportional constant, it is calculated by utilizing the fact that the shaft power of the air supply side blower 1 and the output of the DC motor 19 are equal. Is operated with a large air volume or a small air volume with respect to the target air volume, and if the air volume is operated with a large air volume, the pressure is reduced, and the operation is performed with a small air volume. If so, by increasing the pressure, it is controlled to the target supply airflow corresponding to the air conditioning load. At this time, the supply-side static pressure calculating means 16 calculates the operating speed of the DC motor 19 mounted on the supply-side blower 1, the voltage applied to the DC motor 19, the torque constant as an intrinsic constant of the DC motor 19, and the induced voltage constant. From the pressure proportional constant and the air flow proportional constant determined by the armature resistance and the similarity rule in general fluid, the shaft power of the air supply side blower 1 and the DC motor 1
The static pressure applied to the air supply-side blower 1 is calculated by utilizing the fact that the outputs 9 are equal. Then, the static pressure detection room negative pressure suppression control unit 35 compares the supply-side static pressure obtained by the calculation with the predetermined static pressure g in the operation supply airflow amount stored in advance. As a result of the comparison, if the static pressure obtained by the calculation is large,
It is determined that the supply air volume is extremely small compared to the exhaust air volume, and that the indoor pressure is abnormally negative,
0, a pressure-lowering signal is output, the exhaust air volume of the exhaust-side blower 2 is reduced, and the supply-air-volume control means 22 controls the supply air volume of the intake-side blower 1 in accordance with the exhaust air volume. Suppress negative pressure. Also, the exhaust-side static pressure calculating means 17
Is determined from the operating speed of the DC motor 20 mounted on the exhaust-side blower 2, the applied voltage to the DC motor 20, the torque constant which is an intrinsic constant of the DC motor 20, the induced voltage constant, the armature resistance, and the similarity rule in general fluid. Pressure proportional constant
The static pressure applied to the exhaust-side blower 2 is calculated from the air volume proportional constant using the fact that the shaft power of the exhaust-side blower 2 and the output of the DC motor 20 are equal. Then, the static pressure detection room plus pressure suppression control means 36 controls the exhaust-side static pressure obtained by the calculation and the predetermined static pressure h at the operating exhaust air volume stored in advance.
Compare with As a result of the comparison, if the static pressure obtained by the calculation is large, the supply air volume is much larger than the exhaust air volume,
Judging that the room pressure is abnormally positive, outputs a step-down signal to the supply-side voltage control means 30 to reduce the supply airflow of the supply-side blower 1, and according to the supply airflow. The exhaust air volume control means 24 controls the exhaust air volume of the exhaust-side blower 2 and suppresses the indoor pressure from becoming a positive pressure.

As described above, according to the duct-type simultaneous supply / discharge device of the fourth embodiment of the present invention, the operation speed of the DC motor 19 of the air supply-side blower 1 and the voltage applied to the DC motor 19
The static pressure applied to the supply-side blower 1 is calculated by the supply-side static pressure calculation means 16 and the static pressure determined by the calculation is compared with a predetermined static pressure g. When a stored static pressure g or more is detected, the amount of exhaust air from the exhaust-side blower 2 is reduced, and the amount of exhaust air from the supply-side blower 1 is controlled in accordance with the amount of exhaust air. A means 35 is provided, and the static pressure applied to the exhaust-side blower 2 is calculated by the exhaust-side static pressure calculating means 17 from the operating speed of the DC motor 20 of the exhaust-side blower 2 and the voltage applied to the DC motor 20. Is compared with the predetermined static pressure h, and when the static pressure calculated by calculation is equal to or greater than the predetermined static pressure h stored in advance, the air supply amount of the air supply-side blower 1 is reduced. ,
By providing the static pressure detection room positive pressure suppression control means 36 for controlling the exhaust air volume of the exhaust side blower 2 according to the supply air volume, the indoor pressure is suppressed from becoming an abnormal negative pressure and an abnormal positive pressure. This makes opening and closing the door difficult,
There is no cold draft in winter.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. The same parts as those in the second embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in FIG. 3, when the voltage applied to the DC motor 19 of the air supply side blower 1 is controlled to be equal to or higher than a predetermined voltage i, the exhaust air volume of the exhaust side air blower 2 is reduced. Is a voltage detection indoor negative pressure suppression control means for controlling the amount of air supplied from the air supply side blower 1 to suppress the indoor pressure from becoming a negative pressure. Reference numeral 38 denotes an application to the DC motor 20 of the exhaust side blower 2. When the voltage is controlled to be equal to or higher than the predetermined voltage j, the air supply amount of the air supply side blower 1 is reduced, and the exhaust air amount of the exhaust side blower 2 is controlled in accordance with the air supply amount. This is a voltage detection chamber plus pressure suppression control means that suppresses the occurrence of the pressure increase, and the other configuration is the same as the configuration of the second embodiment.

In the above configuration, fresh outdoor air outside the room is sucked in from the outside air intake 8 through the outside air duct 12, dust and dust are removed by the outside air filter 6, and heat is exchanged with room air by the total heat exchanger 3. Then, it is heated or cooled by the heat exchanger 4, humidified by the humidifier 5, and supplied to the room through the air supply outlet 9 and the air supply duct 13,
Further, the indoor air is sucked from the return air intake 10 through the return air duct 14, dust and dust are removed by the return air filter 7, heat exchange with the outdoor air is performed by the total heat exchanger 3, and then the exhaust air outlet is provided. The air supply air is discharged outside the room through the air supply duct 11 and the exhaust duct 15, and the air supply air amount is calculated by the air supply amount calculation means 21 from the supply switching speed of the winding of the air supply side DC motor drive control means 27. The operating speed of the DC motor 19 mounted on it, the applied voltage to the DC motor 19, the torque constant, the induced voltage constant, the armature resistance, and the pressure proportional constant and air volume determined from the similarity rule in general fluids, which are the intrinsic constants of the DC motor 19 From the proportionality constant, it is calculated by using the fact that the shaft power of the air supply-side blower 1 is equal to the output of the DC motor 19. It is determined whether the operation is performed with a large air volume or a small air volume with respect to the target air volume, and the air supply side voltage control unit 29 determines that the operation is performed with a reduced pressure and a small air volume if the operation is performed with a large air volume. If this is the case, the pressure is increased to control the target supply air volume corresponding to the air conditioning load. On the other hand, the exhaust air volume is calculated by the exhaust air volume calculating means 2.
3, the exhaust-side blower 2 obtained from the switching speed of the current supply to the winding of the exhaust-side DC motor drive control means 28
Operating speed of DC motor 20 and DC motor 2
The exhaust air volume is similarly calculated from the applied voltage to 0 and the torque constant, the induced voltage constant, the armature resistance, and the pressure proportional constant and the air volume proportional constant determined by the similarity rules in general fluids, which are the intrinsic constants of the DC motor 20. Control means 24
And the exhaust side voltage control means 30, the DC motor 20
The target exhaust air volume is similarly controlled by varying the voltage applied to the exhaust gas. At this time, when the supply air volume control unit 22 attempts to increase the applied voltage of the DC motor 19 to a predetermined voltage i or more, the supply air volume is extremely small compared to the exhaust air volume, It judges that the indoor pressure is abnormally negative, outputs a pressure-lowering signal to the exhaust-side voltage control means 30, reduces the exhaust air volume of the exhaust-side blower 2, and supplies the air to the air supply side in accordance with the exhaust air volume. The amount of air supplied to the blower 1 is controlled to suppress the indoor pressure from becoming negative. Further, the positive pressure suppression control means 38 in the voltage detection chamber adjusts the applied voltage of the DC motor 20 to a predetermined voltage j.
When trying to control as described above, it is determined that the supply air volume is extremely large compared to the exhaust air volume, and that the indoor pressure is abnormally positive, and a step-down signal is output to the air supply side voltage control means 29. Then, the air supply amount of the air supply side blower 1 is reduced, and the exhaust air amount of the exhaust side air blower 2 is controlled in accordance with the air supply amount to suppress the indoor pressure from becoming a positive pressure.

As described above, according to the duct type simultaneous supply / discharge device of the fifth embodiment of the present invention, the supply air volume control means 22 is controlled by the DC
When trying to increase the voltage applied to the motor 19 to a predetermined voltage i or more, it is determined that the supply air volume is extremely small compared to the exhaust air volume, and that the indoor pressure is abnormally negative, and the exhaust-side blower 2 A voltage detection chamber negative pressure suppression control unit 37 is provided for reducing the amount of exhaust air and controlling the amount of air supplied to the air supply side blower 1 according to the amount of exhaust air.
When the voltage applied to the motor 20 is controlled to be equal to or higher than the predetermined voltage j, the supply air volume is much larger than the exhaust air volume,
Judging that the indoor pressure is abnormally positive, it reduces the supply air volume of the air supply-side blower 1 and controls the exhaust air volume of the exhaust-side blower 2 in accordance with the air supply amount. Voltage detection chamber plus pressure suppression control means 38 for suppressing pressure
Is provided to prevent the indoor pressure from becoming an abnormal negative pressure and an abnormal positive pressure, so that opening and closing of the door does not become difficult.

[0040]

As is apparent from the above description of the embodiment, according to the present invention, the amount of supplied air is calculated from the operating speed of the DC motor mounted on the supply-side blower and the voltage applied to the DC motor. The exhaust-side air volume calculation means and the exhaust air amount are obtained by calculating the exhaust air volume from the operating speed of the DC motor mounted on the exhaust-side blower and the voltage applied to the DC motor from the supply-side air volume calculation means and the supply air volume control means obtained by A supply-side static pressure calculation means for calculating a static pressure applied to the supply-side blower from an operation speed of a DC motor mounted on the supply-side blower and a voltage applied to the DC motor; The static pressure applied to the exhaust blower is calculated from the operating speed of the DC motor mounted on the side blower and the voltage applied to the DC motor. Static pressure By comparing with the maximum static pressure stored in the supply-side maximum static pressure storage means, the air supply is detected by detecting an increase in pressure loss, such as clogging of the filter on the air supply side or entry of foreign matter into the air supply duct. A pressure loss increase alarm of the system duct is issued, and the static pressure obtained by the exhaust-side static pressure calculating means is compared with the maximum static pressure stored in the exhaust-side maximum static pressure storage means, and the exhaust-side filter is clogged. By providing a supply / exhaust pressure loss increase notification means that detects an increase in pressure loss, such as the entry of foreign matter into the exhaust system duct, and issues a pressure loss increase alarm for the exhaust system duct, air supply can be performed without using a special sensor. In addition to detecting and controlling the air volume and exhaust air volume, the user can investigate the cause of the pressure loss increase in the air supply duct and the exhaust system duct and take countermeasures, and can prevent disasters such as duct fires etc. Safety It is possible to provide a ducted same hourly wage exhaust equipment have.

Further, when an attempt is made to control the voltage applied to the DC motor mounted on the air supply side blower to a predetermined voltage c or more, the user is notified that the capacity of the air supply side blower has been exceeded, and the exhaust is performed. When the voltage applied to the DC motor mounted on the side blower is controlled to be equal to or higher than the predetermined voltage d, a supply / discharge air blowing function power over notification means for notifying the user that the capacity of the exhaust side fan has been exceeded is provided. By detecting the air supply volume control exceeding the capacity of the air supply side blower due to clogging of the air supply side filter and the entry of foreign matter into the air supply system duct, etc. Alerts the user that the capacity of the supply-side fan has been exceeded, and exceeds the capacity of the exhaust-side blower due to clogging of the exhaust-side filter and entry of foreign matter into the exhaust duct. Exhaust The volume control is detected, and the air supply / exhaust air function over-notification means informs the user that the capacity of the exhaust-side blower has been exceeded. The cause of the increase in pressure loss can be investigated and countermeasures can be taken, so that a disaster such as a duct fire can be prevented.

A supply-side static pressure calculating means for calculating a static pressure applied to the supply-side blower from an operation speed of a DC motor mounted on the supply-side blower and a voltage applied to the DC motor; The exhaust-side static pressure calculating means for calculating the static pressure applied to the exhaust-side blower from the operating speed of the DC motor mounted on the blower and the voltage applied to the DC motor, and the static pressure calculated by the supply-side static pressure calculating means. By comparing the pressure with the minimum static pressure stored in the supply-side minimum static pressure storage means, an abnormal decrease in pressure loss such as disconnection of the filter on the supply side or breakage of the supply duct is detected. An alarm for abnormally low pressure loss of the air duct is issued, and the static pressure obtained by the exhaust-side static pressure calculating means is compared with the minimum static pressure stored in the exhaust-side minimum static pressure storage means, and the static pressure obtained by the operation is calculated. Pre-stored pressure When detecting a small static pressure or less, an abnormal supply / exhaust airtightness alerting means is provided that detects an abnormal decrease in pressure loss, such as removal of the filter on the exhaust side or breakage of the exhaust system duct, and issues an alarm for abnormally low pressure loss in the exhaust system duct. Thus, the user can investigate the cause of the abnormal decrease in the pressure loss of the supply duct and the exhaust duct and take a countermeasure, and can prevent damage to the building due to duct damage or the like.

Also, the static pressure applied to the air supply side blower is calculated by the air supply side static pressure calculation means from the operation speed of the DC motor mounted on the air supply side blower and the voltage applied to the DC motor. Pressure and predetermined static pressure g
When the static pressure obtained by calculation is equal to or greater than a predetermined static pressure g stored in advance, the exhaust air volume of the exhaust-side blower is reduced, and the air supply of the air-supply-side blower is reduced in accordance with the exhaust air volume. A static pressure detection chamber negative pressure suppression control means for controlling the air volume is provided, and the static pressure applied to the exhaust side blower is calculated by the exhaust side static pressure calculation means based on the operating speed of the DC motor mounted on the exhaust side blower and the voltage applied to the DC motor. The pressure is obtained by calculation, and the static pressure obtained by this calculation is compared with a predetermined static pressure h. When the static pressure obtained by the calculation is detected to be equal to or higher than a predetermined static pressure h stored in advance, the air supply side blower By providing a static pressure detection room positive pressure suppression control means for reducing the supply air flow of the exhaust air and controlling the exhaust air flow of the exhaust-side blower according to the supply air flow, the indoor pressure becomes abnormally negative pressure and abnormal positive pressure. Becomes In order to suppress, or become the opening and closing of the door it is difficult, not to produce a cold draft in winter.

When the supply air volume control means attempts to increase the voltage applied to the DC motor mounted on the air supply side blower to a predetermined voltage i or more, the supply air volume is extremely small compared to the exhaust air volume, and Is determined to be abnormally negative pressure,
A voltage detection chamber negative pressure suppression control means for reducing the exhaust air volume of the exhaust side blower and controlling the supply air volume of the air supply side blower according to the exhaust air volume is provided, and the exhaust air volume control means is provided with a DC mounted on the exhaust side blower. When trying to control the voltage applied to the motor to be equal to or higher than the predetermined voltage j, it is determined that the supply air volume is extremely large compared to the exhaust air volume, and that the indoor pressure is abnormally a positive pressure, The air flow rate is reduced, and the exhaust air flow rate of the exhaust-side blower is controlled in accordance with the supplied air flow rate. Since a negative pressure and an abnormal positive pressure are suppressed, it is possible to provide a duct-type simultaneous supply / discharge device in which supply and exhaust are always balanced without opening and closing the door.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a duct-type simultaneous supply / discharge device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an example of a program for the operation.

FIG. 3 is a configuration diagram of a duct-type simultaneous supply / discharge device according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing an example of a program for the operation.

FIG. 5 is a configuration diagram of a duct-type simultaneous supply / discharge device according to a third embodiment of the present invention.

FIG. 6 is a flowchart showing an example of a program for the operation.

FIG. 7 is a configuration diagram of a duct-type simultaneous supply / discharge device according to a fourth embodiment of the present invention.

FIG. 8 is a flowchart showing an example of a program for the operation.

FIG. 9 is a configuration diagram of a duct-type simultaneous supply / discharge device according to a fifth embodiment of the present invention.

FIG. 10 is a flowchart showing an example of a program for the operation.

FIG. 11 is a configuration diagram of a conventional duct-type simultaneous supply / discharge device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 supply-side blower 2 exhaust-side blower 3 total heat exchanger 4 heat exchanger 5 humidifier 16 supply-side static pressure calculation means 17 discharge-side static pressure calculation means 18 supply / discharge pressure loss increasing notification means 19 DC motor (supply Side) 20 DC motor (exhaust side) 21 air supply side air volume calculation means 22 air supply air volume control means 23 exhaust air volume calculation means 24 exhaust air volume control means 25 air supply side maximum static pressure storage means 26 exhaust side maximum static pressure storage means 31 Supply / discharge air function over-power notification means 32 Supply-side minimum static pressure storage means 33 Exhaust-side minimum static pressure storage means 34 Supply / exhaust airtightness abnormality notification means 35 Static pressure detection room negative pressure suppression control means 36 Static pressure detection room positive pressure suppression Control means 37 Voltage detection room negative pressure suppression control means 38 Voltage detection room positive pressure suppression control means

Claims (5)

(57) [Claims] An air supply side blower equipped with a DC motor for supplying outdoor air taken in from an outdoor air intake port to the indoor side, and a humidifying and cooling supply air supplied by the air supply side blower. A heat exchanger, a humidifier for humidifying the supply air, an exhaust-side blower equipped with a DC motor for discharging indoor air taken in from an indoor air suction port to the outside of the room, outdoor air and indoor air A total heat exchanger for performing heat exchange with the air supply side, and an air supply side air volume calculating means for calculating an operation air volume of the air supply side blower from an operation speed of a DC motor of the air supply side blower and a voltage applied to the DC motor. An air supply amount control means for controlling an operation air amount of the air supply side blower to a predetermined air amount; and a static power applied to the air supply side blower based on an operation speed of the DC motor of the air supply side blower and a voltage applied to the DC motor. Air supply side for calculating pressure Pressure calculation means, supply-side maximum static pressure storage means for storing the maximum static pressure of the supply-side duct system, and the exhaust-side blower based on the operating speed of the DC motor of the exhaust-side blower and the voltage applied to the DC motor. Exhaust-side air volume calculating means for calculating an operating air volume, exhaust-air volume controlling means for controlling the operating air volume of the exhaust-side blower to a predetermined air volume, and D of the exhaust-side blower.
Exhaust-side static pressure calculation means for calculating the static pressure applied to the exhaust-side blower from the operating speed of the C motor and the voltage applied to the DC motor, and exhaust-side maximum static pressure storage means for storing the maximum static pressure of the exhaust-side duct system Controlling the operation of the air supply-side blower and the exhaust-side air blower, wherein the air supply-side static pressure obtained by the air supply-side static pressure calculation means is stored in the air supply-side maximum static pressure storage means. When the static pressure a or more is detected, an increase in the pressure loss of the supply-side duct system is notified, and the exhaust-side static pressure obtained by the exhaust-side static pressure calculation means is stored in the exhaust-side maximum static pressure storage means. A duct-type simultaneous supply / discharge device provided with supply / discharge pressure loss increase notification means for notifying an increase in pressure loss of the exhaust side duct system when a predetermined static pressure b or more is detected. 2. An air supply blower equipped with a DC motor for supplying outdoor air taken in from an outdoor air suction port to the indoor side, and a humidifier for cooling and supplying air supplied by the air supply blower. A heat exchanger, a humidifier for humidifying the supply air, an exhaust-side blower equipped with a DC motor for discharging indoor air taken in from an indoor air suction port to the outside of the room, outdoor air and indoor air A total heat exchanger for performing heat exchange with the air supply side, and an air supply side air volume calculating means for calculating an operation air volume of the air supply side blower from an operation speed of a DC motor of the air supply side blower and a voltage applied to the DC motor. Supply air flow rate control means for controlling the operation air flow rate of the air supply side blower to a predetermined air flow rate; and calculating the operation air flow rate of the exhaust side blower from the operating speed of the DC motor of the exhaust side blower and the voltage applied to the DC motor. Exhaust side wind Calculating means, exhaust air volume control means for controlling the operating air volume of the exhaust-side blower to a predetermined air volume, and supplying air to the DC motor of the air supply-side blower at a predetermined voltage c or higher. Notifying that the capacity of the side blower has been exceeded, and when trying to control the applied voltage to the DC motor of the exhaust side blower to a predetermined voltage d or more,
A duct-type simultaneous supply / discharge device provided with a supply / discharge air supply function excess notification unit for notifying that the capacity of the exhaust side blower has been exceeded. 3. An air supply side minimum static pressure storage means for storing a minimum static pressure of the air supply side duct system, an exhaust side minimum static pressure storage means for storing a minimum static pressure of the exhaust side duct system, and an air supply side. When the supply-side static pressure calculated by the static pressure calculation means is detected to be equal to or less than the predetermined static pressure e, an airtight abnormality of the supply-side duct system is notified, and the exhaust-side static pressure calculated by the exhaust-side static pressure calculation means is reduced. 2. A duct-type simultaneous supply / discharge device according to claim 1, further comprising a supply / exhaust airtightness abnormality notifying means for notifying an airtightness abnormality of the exhaust side duct system when a predetermined static pressure f or less is detected. 4. When the supply-side static pressure calculated by the supply-side static pressure calculation means detects a predetermined static pressure g or more, the amount of exhaust air from the exhaust-side blower is reduced, and the air supply is performed in accordance with the amount of exhaust air. A static pressure detection chamber negative pressure suppression control means for controlling the amount of air supplied to the side blower to prevent the indoor pressure from becoming negative pressure, and the exhaust-side static pressure obtained by the exhaust-side static pressure calculation means being a predetermined static pressure h is detected, the air supply amount of the air supply side blower is reduced, and the air flow amount of the exhaust side blower is controlled in accordance with the air supply amount, thereby suppressing the indoor pressure from becoming a positive pressure. The duct type simultaneous supply / discharge device according to claim 1, further comprising an indoor positive pressure suppression control means. 5. When the voltage applied to the DC motor of the air supply side blower is controlled to be equal to or higher than the predetermined voltage i, the amount of air exhausted from the air side blower is reduced, and the air supply to the air supply side blower is reduced in accordance with the amount of air exhausted. A voltage detection indoor negative pressure suppression control means for controlling an air flow rate to prevent the indoor pressure from becoming negative pressure, and a supply voltage when controlling the applied voltage to the DC motor of the exhaust side blower to a predetermined voltage j or more. A voltage detection chamber positive pressure suppression control means for reducing the supply air flow of the air blower, controlling the exhaust air flow of the exhaust blower in accordance with the supply air flow, and suppressing the indoor pressure from becoming a positive pressure. 3. The duct-type simultaneous supply / discharge device according to claim 2, wherein: