KR100748165B1 - Apparatus for controlling duct type air conditioner combined with ventilation and thereof method - Google Patents

Abstract

A device and a method for controlling a duct type air conditioner combined with ventilator are provided to carry out ventilation operation according to a time period set by a measured atmospheric temperature for preventing elongation of cooling or heating operation, which is carried out after the ventilation, thereby reducing power consumption. A device for controlling a duct type air conditioner combined with ventilator includes a room air discharging temperature sensor(53), a CO2 concentration sensor(52), an atmospheric temperature sensor(50), and a controller(70). The controller controls an amount of wind discharged to a room space according to a room air discharging temperature measured by the room air discharging temperature sensor and introduces atmospheric air into the room space according to the measured atmospheric temperature when the air conditioner is being operated. The controller controls time period for ventilation operation according to the measured atmospheric temperature and the measured CO2 concentration when the air conditioner is in a ventilation mode.

Description

Apparatus For Controlling Duct Type Air Conditioner Combined with Ventilation And Thereof Method}

Figure 1 shows that the combined duct-type air conditioner according to the present invention operates in a cooling and heating mode.

Figure 2 shows that the combined duct-type air conditioner according to the present invention operates in the air supply mode.

Figure 3 shows that the combined duct type air conditioner according to the present invention operates in the exhaust mode.

Figure 4 shows that the combined duct type air conditioner according to the present invention operates in the ventilation mode.

5 is a block diagram of a control device of a combined duct type air conditioner according to the present invention.

6 is a flowchart illustrating a control method of a combined duct type air conditioner according to the present invention.

* Description of symbols on the main parts of the drawings *

3: first chamber 4: second chamber

5: outside air inlet 6: outdoor outlet

7: Indoor air intake 8: Indoor air outlet

10: indoor fan motor 21: 1st blowing fan

22: 2nd blower fan 25: heat exchanger

50: outdoor temperature sensor 51: indoor suction temperature sensor

52: carbon dioxide concentration sensor 53: indoor discharge temperature sensor

The present invention relates to a control apparatus and a method of a combined-use duct type air conditioner, and more particularly, to control cooling, heating, and ventilation operation by using information obtained from various sensors installed at an appropriate position of the air conditioner. The present invention relates to a control apparatus and a method of a duct-type air conditioner for a combined use of ventilation to improve the performance of an air conditioner.

An air conditioner cools or heats an indoor room by dispersing the indoor air passing through the outside of the indoor heat exchanger with a refrigerant passing through the inside of the indoor heat exchanger and cooling or heating the air. In order to prevent heat loss, the indoor space is sealed to prevent the outdoor air from entering the room or the indoor air.

Therefore, when the air conditioner is operated for a long time, indoor air is discharged to the outside or the outdoor air is not introduced into the room, and the indoor air becomes muddy and thus it is impossible to provide a comfortable environment to the people in the room.

A ventilator can be installed separately from the air conditioner to vent muddy indoor air to the outside and fresh air to enter the room to ventilate the indoor space to the outdoor air. There is a problem that the installation space of the should be secured, and the cost of installing the ventilation system should be added.

On the other hand, Korean Patent Publication No. 10-0519306 discloses a ventilation integrated air conditioning system that can also act as a ventilation in order to avoid the need for additional ventilation device. However, this ventilation integrated air conditioning system is composed of a ceiling type air conditioner combined with a ventilation device, and since the total heat exchanger is directly installed in the air conditioner, the size of the main body is inevitably increased, resulting in increased installation cost and poor aesthetics. There is a problem. In addition, this ventilation integrated air conditioning system is structurally unable to selectively suck the outdoor air and exhaust of the indoor air, and because the intake flow rate of the outdoor air and the exhaust flow rate of the indoor air cannot be adjusted, it is necessary to ventilate the indoor space more than necessary. There is a problem.

On the other hand, Korean Patent Publication No. 1991-0004391 discloses an air conditioner for ventilating a partitioned space when the carbon dioxide concentration in the room measured using a carbon dioxide concentration sensor is more than a predetermined value. This air conditioner is equipped with various dampers, such as an exhaust damper, an external air introduction damper, and a ventilation damper, and has a structure which operates these dampers appropriately and ventilates according to the density | concentration of carbon dioxide.

By the way, when the ventilation operation is performed during the cooling or heating operation, the air conditioner may be stopped as it is after the ventilation operation is performed. However, the cooling or heating operation is resumed after completing the ventilation operation. The temperature of the entire indoor air is changed by the outdoor air introduced by the operation. Therefore, if the ventilation operation is unnecessarily long time, the operation time in the cooling or heating operation to be resumed is long, unnecessary waste of power is wasted and it is a factor that reduces the consumer's confidence in the performance of the air conditioner.

On the other hand, cooling operation is required in a computer room or a karaoke room having a specific function even when the outdoor temperature is low, such as in winter. In this case, in the case of the cooling operation, an unbalance is generated in the cooling operation cycle due to the low temperature outdoor environment, so that there is a problem in that the effective cooling is not achieved.

On the other hand, conventionally, even if the air conditioner is operated, it takes a certain time for the operation to start and the room temperature reaches the set temperature immediately, depending on the temperature of the air discharged into the indoor space during the required time. Because the haptic performance is different, the amount of air discharged from the cooling or heating operation was not properly adjusted.

The present invention is to solve the above problems, an object of the present invention is to use the information obtained from the various sensors installed in the appropriate position of the duct-type air conditioner for ventilation combined with a structure capable of ventilating the room air The present invention provides a control apparatus and a method of a duct-type air conditioner for a combined use of ventilation to improve the performance of an air conditioner by controlling cooling, heating, and ventilation operations.

In order to achieve the above object, the present invention provides a control method of a combined duct type air conditioner having a structure capable of ventilating indoor air. Controlling the amount of air to be discharged; Driving outdoor air into the indoor space according to the outdoor temperature; And controlling the operation timing of the ventilation operation according to the outdoor temperature.

In the controlling of the air volume discharged to the indoor space, the discharge air volume is reduced as the indoor discharge temperature is higher than the reference temperature in the cooling operation.

The step of driving the outdoor air into the indoor space is applied when the outdoor temperature is lower than the reference temperature and the cooling operation in a low temperature environment.

The controlling of the operation timing of the ventilation operation according to the carbon dioxide concentration may include ventilation in at least two kinds of driving modes according to the measured concentration of carbon dioxide, and in the two kinds of driving modes, the carbon dioxide concentration is greater than the first reference concentration. A first mode for simultaneously supplying air and exhausting indoor air; and a second mode for performing only one of supply of outdoor air or exhaust of indoor air because a carbon dioxide concentration is greater than a second reference concentration less than the first reference concentration. to be.

The present invention for achieving the above object has a structure capable of ventilating the indoor air, and can selectively supply the air of the outdoor air and the exhaust of the indoor air, appropriately adjust the intake flow rate of the outdoor air and the exhaust flow rate of the indoor air A control apparatus of a combined duct type air conditioner for controlling, comprising: an indoor discharge temperature sensor; Carbon dioxide concentration sensor; Outdoor temperature sensor; And controlling the air volume discharged to the indoor space according to the indoor discharge temperature measured by the indoor discharge temperature sensor during operation of the air conditioner, and introducing outdoor air into the indoor space according to the outdoor temperature measured by the outdoor temperature sensor. And a control unit controlling a time period of the ventilation operation according to the outdoor temperature measured by the outdoor temperature sensor during the ventilation operation according to the carbon dioxide concentration measured by the carbon dioxide concentration sensor.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the duct type air conditioner, the housing is installed inside the ceiling so as not to occupy the interior space, and the indoor air intake ducts and the indoor exhaust vents provided in the housing communicate with the indoor space through the ceiling, respectively. It is an air conditioner that connects ducts to suck up indoor air through various locations on the ceiling and discharge harmonized air to the indoor space through various locations on the ceiling. Therefore, the duct type air conditioner can effectively use the space in a relatively large store or office, and can efficiently perform cooling or heating of a large indoor space.

1 to 4 show that the duct-type air conditioner to which the present invention is applied is configured to function as a ventilation and operate in various modes.

The structure of such a duct type air conditioner is disclosed in Patent Application No. 10-2006-0025255 filed by the applicant, and further shows that various sensors 50-53 are provided at appropriate positions. Hereinafter, a description will be given mainly of the configuration related to the technical features of the present invention.

First, the configuration of the duct-type air conditioner for dual ventilation will be described with reference to FIG. 1, which has been shown to operate in a cooling and heating mode.

As shown in FIG. 1, the duct-type air conditioner for a ventilation system has a box-shaped housing 1 having an interior of a first chamber 3 and a second interior by a partition wall 2 crossing the interior space in a longitudinal direction. It is partitioned into the chamber 4. The outside air inlet 5 is provided at the rear of the first chamber 3 so that outdoor air flows into the interior of the first chamber 3, and the front of the second chamber 4 is introduced into the second chamber 4. An outdoor outlet 6 is provided to discharge indoor air to the outside. An indoor air inlet 7 is provided at the rear of the first chamber 3 and the second chamber 4, and an indoor outlet 8 is provided at the front of the first and second chambers 3, 4.

The indoor air intake port 7 and the indoor exhaust port 8 include a plurality of suction grilles (not shown) and discharge grilles (not shown) spaced at regular intervals to allow the indoor air to be sucked and discharged at various points in the indoor space. Equipped.

Inside the first chamber 3 and the second chamber 4 is arranged a heat exchanger 25 arranged in the transverse direction, the first blowing fan 21 is arranged in the first chamber 3, The second blowing fan 22 is disposed in the second chamber 4. The heat exchanger 25 has a single unitary structure and is installed over the first chamber 3 and the second chamber 4, but in a separate structure, respectively, in the first chamber 3 and the second chamber 4, respectively. It may also be installed (see FIG. 5 of the citation filed by the applicant).

The first blowing fan 21 and the second blowing fan 22 are coupled to the rotating shaft 11 extending from the opposite end of the motor 10 installed in the partition wall 2 and simultaneously driven by the driving of the motor 10. It may be rotated, but may be rotated independently by a separately installed motor (see Fig. 5 of the citation filed by the applicant).

The air supply damper 30 is hinged to the end of the outside air inlet 5 in the first chamber 3 to open and close the outside air intake 5, and the exhaust at the end of the outdoor outlet 6 in the second chamber 4. The damper 31 is hinged to open and close the outdoor outlet 6.

The air supply damper 30 and the exhaust damper 31 can be rotated by the air supply damper motor 40 and the exhaust damper motor 41 to adjust the opening degree of the air supply damper 30 and the exhaust damper 31, respectively. The air intake flow rate and the indoor air exhaust flow rate can be adjusted.

Of course, by controlling the rotational speed of the indoor fan motor 10 by adjusting the rotational speed of the first and second blowing fan 21, 22, it is also possible to adjust the intake flow rate of the outdoor air and the discharge flow rate of the indoor air.

In addition, although not shown, a filter is installed at the outside air intake port 5, the indoor air intake port 7, or the indoor exhaust port 8 to filter dust or foreign matter contained in the indoor air and outdoor air.

On the other hand, the present invention is to install a variety of sensors in the appropriate position in order to control the various operating modes of the combined-use duct type air conditioner, the outdoor temperature sensor for measuring the temperature of the outdoor air introduced into the outside air intake (5) 50), an indoor suction temperature sensor 51 for measuring the temperature of the indoor air sucked into the chamber and a carbon dioxide concentration sensor 52 for measuring the carbon dioxide concentration of the indoor air in the indoor air inlet 7 The indoor discharge port 8 is provided with an indoor discharge temperature sensor 53 for measuring the temperature of the air discharged into the indoor space.

FIG. 5 is a block diagram of a control device of a combined duct type air conditioner according to the present invention, which includes an input unit 60 and various sensors 50, 51, 52 for a user to input a driving command. (53), the control unit 70 for outputting a motor control command to the motor drive unit 80 according to the information provided from the input unit and various sensors, the air supply damper motor 40, the exhaust damper motor 41 in accordance with the motor control command And a motor driver 80 for driving the indoor fan motor 10. In addition, the control device stores a timer 90 for setting a predetermined time according to the control of the control unit, counting the passage of time and providing the result to the control unit, and various kinds of information necessary for the operation of the air conditioner. It includes a storage unit 100 for storing information about the reference concentration of carbon dioxide for performing.

When the control unit 70 operates in a cooling / heating mode that performs only cooling or heating without ventilating indoor air, the control unit 70 closes the air supply damper 30 and the exhaust damper 31 as shown in FIG. The outlet 6 is closed so that outdoor air is not introduced into the room and indoor air is not discharged to the outside.

In addition, the control unit 70 recognizes this as information received through the carbon dioxide concentration sensor 52 when the cooling or heating operation continues for a predetermined time and the room becomes cloudy. As shown in FIG. 2, the exhaust damper 31 is supplied with air supply closed. By opening the damper 30 at a predetermined angle, the indoor air may be operated in an air supply mode in which only outdoor air is introduced into the indoor space without being discharged to the outside.

In addition, the controller 70 recognizes this as information received through the carbon dioxide concentration sensor 52 when the cooling or heating operation is continued for a predetermined time, and exhausts the air supply damper 30 closed as shown in FIG. 3. The damper 31 may be opened at an angle to allow the outdoor air to operate in an exhaust mode in which only the indoor air is discharged to the outdoors without being introduced into the room.

In addition, the control unit 70, in order to ventilate the indoor air to the outdoor air even if the room is cloudy or the air conditioner does not operate because the cooling or heating operation for a certain time, as shown in Figure 4, the air supply damper 30 and the exhaust damper ( 31 all of them are opened at a predetermined angle so that the indoor air is discharged to the outside through the second chamber 4 and the outdoor discharge port 6, and the outdoor air is discharged to the interior through the outside air inlet 5 and the first chamber 3. The turbid indoor air is discharged to the outside and fresh outdoor air can fill the interior.

When the cooling or heating operation is resumed after such various ventilation operations, the temperature of the indoor air is changed according to the temperature of the outdoor air introduced by the previously performed ventilation operation. In this embodiment, the control unit determines the time period of the ventilation operation according to the outdoor temperature measured by the outdoor temperature sensor, and executes various modes of the ventilation operation based on this.

In addition, the controller 70 controls the discharge air volume by controlling the rotation speed of the indoor fan according to the indoor discharge temperature measured by the indoor discharge temperature sensor 53 during the cooling or heating operation to adjust the haptic temperature felt by the occupants of the indoor space. Can be.

In addition, the control unit 70 controls the operation of the air supply damper and the exhaust damper in a state in which the outdoor temperature is low and the effectiveness of the cooling operation is low, such as a winter cooling operation, so that the outdoor air can be introduced to obtain a cooling effect substantially.

It describes the operation of the dual-use duct-type air conditioner according to the present invention configured as described above.

The air conditioner according to the present invention will be described with reference to FIG. 6, for example, in a case in which the ventilation operation is performed according to the carbon dioxide concentration when the room temperature reaches the set temperature by cooling or heating operation.

First, when power is supplied to the air conditioner (200), the initialization operation is performed according to the operation control program.

The user sets a command for a desired driving mode, a command for a desired room temperature, etc. via the input unit 60 (210). Indoor suction temperature (hereinafter referred to as indoor temperature), indoor discharge temperature, and outdoor temperature are measured through each temperature sensor, and the measured information is provided to the controller 70 (220).

The controller 70 applies a motor control command to the motor driver 80 for cooling or heating operation, and in response thereto, the motor driver 80 drives the air supply damper motor 40 and the exhaust damper motor 41, respectively. Accordingly, the air supply damper 30 and the exhaust damper 31 are both closed (230).

In this state, when the room temperature is higher or lower than the set temperature, either the cooling or heating mode is set according to the user's operation mode command set in operation 210, and the cooling or heating set as shown in FIG. 1 is executed. 240).

Subsequently, it is determined whether the start operation is completed during the cooling or heating operation (250). If the start operation is completed as a result of the determination, it is determined whether the indoor temperature reaches the set temperature (260).

In operation 260, when the indoor temperature does not reach the set temperature, the indoor discharge temperature measured by the indoor discharge temperature sensor 53 is provided to the controller 70 (262), and the controller 70 discharges the measured indoor discharge. The speed of the indoor fan motor is controlled according to the temperature (264). Here, for example, if the indoor discharge temperature is higher than the set temperature in the cooling operation, the resident feels a high temperature for the residents directly contacting the air discharged in this state (even though the cooling operation is performed). By reducing the speed of the motor and slightly reducing the amount of air discharged, the resident's sense of temperature can be alleviated.

Subsequently, the outdoor pollution measured by the outdoor temperature sensor 50 is provided to the controller 70 (266), and the controller 70 operates the air supply damper 30 and the exhaust damper 31 according to the measured outdoor temperature. (268). For example, when the cooling operation in a low-temperature outdoor environment, such as winter, when the outdoor temperature is lower than the reference temperature to introduce outdoor air to help the cooling effect, the air supply damper 30 is opened. The operation then proceeds to operation 240.

Meanwhile, when the indoor temperature reaches the set temperature as a result of the determination of operation 260, it is determined whether a driving stop command is input (270). If the operation stop command is not input as a result of the determination, the carbon dioxide concentration A is measured through the carbon dioxide concentration sensor 52, and the measurement signal is provided to the controller 70 (280). The controller 70 determines whether the measured carbon dioxide concentration A is greater than the first reference concentration (1000 ppm) set in advance (290), and as a result, the carbon dioxide concentration (A) is the first reference concentration (1000 ppm). If larger, that is, when the indoor air is severely polluted and immediate and rapid ventilation operation is required, the control unit 70 turns off the indoor fan motor 10 (300). The reason for turning off the indoor fan motor 10 is to consider this, because the operation of the air supply damper 30 and the exhaust damper 31 is not smooth in the operating state of the indoor fan motor 10.

The controller 70 applies a motor control command for the ventilation operation to the motor driver 80. In response, the motor driver drives the air supply damper motor 40 and the exhaust damper motor 41, and both the air supply damper 30 and the exhaust damper 31 are opened 310. In this state, when the control unit 70 operates the indoor fan motor 10, as shown in FIG. 4, the outdoor air outlet 6 and the outdoor air inlet 5 are operated in an open state, so that the indoor air is the second chamber 4. ) And the outdoor air is discharged to the outside through the outdoor outlet (6), and the outdoor air is introduced into the room through the outdoor air intake port (5) and the first chamber (3). It can be filled (320).

In the ventilation operation, the controller 70 receives the outdoor temperature measured by the outdoor temperature sensor 50 (330). The controller 70 sets the timer 90 to the timer 90 to maintain the ventilation operation according to the measured outdoor temperature (340). At this time, the standby time corresponding to the outdoor temperature is stored in advance in the storage unit 100. Preferably, the waiting time is set shorter as the outdoor temperature becomes higher, for example, in a cooling operation. In this embodiment, the controller does not introduce a method of automatically setting the waiting time according to the outdoor temperature, but is not limited thereto, and a method in which the user directly sets the waiting time through the input unit may also be applied.

After setting the waiting time, the timer 90 starts operation by the controller 70 (350). The controller 70 determines whether the set waiting time has elapsed (360). If the waiting time has not elapsed, the control unit 70 proceeds to operation 350 while maintaining the ventilation operation. It is determined whether the carbon dioxide concentration A measured by the concentration sensor 52 is smaller than the preset second reference concentration (800 ppm) (370). As a result of the determination, if it is not less than the second reference concentration, the operation proceeds to operation 290. If the measured carbon dioxide concentration A is less than the second reference concentration, the controller 70 supplies the air supply damper 30 to release the ventilation operation. ) And the exhaust damper 31 is closed (380).

After completing the gating ventilation operation, the process proceeds to operation 260 in order to be able to perform the required cooling or heating operation according to the room temperature.

On the other hand, if it is determined in operation 290 that the carbon dioxide concentration A is not greater than the first reference concentration (1000 ppm), it is determined whether the carbon dioxide concentration A is greater than the third reference concentration (900 ppm) (292). As a result, when the carbon dioxide concentration (A) is greater than the third reference concentration (900 ppm), that is, when the pollution of the indoor air is not severe, but ventilation operation is required, simply exhausting the muddy indoor air as shown in FIG. If it is possible to alleviate the contamination of the indoor air, the control unit 70 turns off the indoor fan motor 10 (294), and applies a motor control command to the motor driving unit 80 to exhaust the air supply damper 30 with the air conditioner closed. The damper 31 is opened 296. In such an exhaust mode, the indoor fan motor 10 is controlled to operate so that only indoor air is discharged to the outside without cooling or heating (298). Thereafter, operation 330 is performed to perform the above operation. In the operations 294, 296 and 298 of the embodiment, the air supply damper is closed and exhausted. Alternatively, the air supply damper 30 is operated in a slightly open state so that the air in the indoor space is not insufficient. Can also be applied.

On the other hand, if the carbon dioxide concentration A is not greater than the third reference concentration (900 ppm) as a result of the determination in operation 292, the controller 70 recognizes that the indoor air is not severely polluted and ventilation operation is not necessary. Then, the outdoor temperature is measured to determine the waiting time as described above (293), the waiting time is set in the timer 90 according to the measured outdoor temperature (295), and the timer is operated by the controller (297). . Here, the waiting time corresponding to the outdoor temperature is stored in advance in the storage unit 100. Preferably, the waiting time is set shorter as the outdoor temperature is higher in the cooling operation.

Subsequently, the controller 70 determines whether the set waiting time has elapsed (299). If the waiting time has not elapsed as a result of the determination, the control unit 70 proceeds to 297.

As described above, according to the present invention, the ventilation operation can be performed at a time period determined according to the outdoor temperature during the ventilation operation, thereby preventing the cooling or heating operation resumed after the ventilation from being unnecessarily extended for a long time, thereby reducing power consumption. It is possible to improve the consumer's confidence in the performance of the air conditioner.

In addition, the present invention can be cooled in a computer room or a karaoke room can be expected in the computer room or karaoke can be expected cooling effect by introducing the outdoor air into the indoor space by controlling the damper according to the outdoor temperature even if the cooling operation in a low-temperature outdoor environment, such as winter.

In addition, the present invention can properly adjust the air volume of the discharged air according to the temperature of the air discharged into the indoor space during cooling or heating operation, so that the temperature felt by the occupants of the indoor space can not be felt excessively so Has an advantageous effect.

Claims (5)

delete In the control method of the combined duct type air conditioner having a structure capable of ventilating indoor air, Controlling the air volume discharged to the indoor space according to the indoor discharge temperature in order to adjust the haptic temperature felt by the occupant; Driving outdoor air into the indoor space according to the outdoor temperature; And Controlling the operation timing of the ventilation operation according to the carbon dioxide concentration, The controlling of the amount of air discharged into the indoor space is a control method of a combined duct type air conditioner, characterized in that the discharge air flow is reduced as the indoor discharge temperature is higher than the reference temperature in the cooling operation. In the control method of the combined duct type air conditioner having a structure capable of ventilating indoor air, Controlling the air volume discharged to the indoor space according to the indoor discharge temperature in order to adjust the haptic temperature felt by the occupant; Driving outdoor air into the indoor space according to the outdoor temperature; And Controlling the operation timing of the ventilation operation according to the carbon dioxide concentration, The step of driving the outdoor air into the indoor space is a control method of a combined duct type air conditioner, characterized in that the outdoor temperature is lower than the reference temperature and applied during the cooling operation in a low temperature environment. delete With the structure to ventilate the indoor air, it is possible to selectively supply the air of the outdoor air and the exhaust of the indoor air, and the duct type air conditioner for ventilation to adjust the intake flow rate of the outdoor air and the exhaust air flow of the indoor air appropriately. In the control device of, Indoor discharge temperature sensor; Carbon dioxide concentration sensor; Outdoor temperature sensor; And When the air conditioner operates, the air volume discharged to the indoor space is controlled according to the indoor discharge temperature measured by the indoor discharge temperature sensor, and outdoor air is introduced into the indoor space according to the outdoor temperature measured by the outdoor temperature sensor. And a control unit controlling a time period of the ventilation operation according to the outdoor temperature measured by the outdoor temperature sensor during the ventilation operation according to the carbon dioxide concentration measured by the carbon dioxide concentration sensor. The control unit reduces the discharge air flow rate as the indoor discharge temperature is higher than the reference temperature in the cooling operation, and operates by introducing outdoor air into the indoor space during the cooling operation in the low temperature environment when the outdoor temperature is lower than the reference temperature. Control device of mold type air conditioner.

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