KR101858525B1 - Air conditioning system with positive pressure maintenance function - Google Patents

Abstract

The present invention relates to an air conditioning system with a positive pressure maintenance function, which can improve energy efficiency by significantly reducing an exhaust fan operating rate. According to the present invention, when an outdoor air temperature is a pleasant temperature not to be low or high, a supply fan is operated, and an exhaust fan is stopped. Therefore, outdoor air is supplied to a main space portion, and indoor air of the main space portion is discharged to the outside by pressure caused by the outdoor air supplied to the main space portion.

Description

TECHNICAL FIELD [0001] The present invention relates to an air conditioning system having a positive pressure holding function,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system having a positive pressure holding function, and more particularly, to an air conditioning system having a positive pressure holding function capable of remarkably reducing an exhaust fan operating rate to increase energy efficiency.

Generally, the building automation system is designed to operate buildings such as air conditioning equipment, power lighting equipment, crime prevention, disaster prevention equipment, transportation equipment, parking control system, etc. installed in the buildings so that the people working in the buildings can work more efficiently and comfortably in a pleasant environment. Is a system that improves the operational efficiency and management methods of buildings by automatically managing and controlling the various facilities required for the building.

The air conditioning system maintains the indoor environment comfortably by appropriately managing the temperature and humidity, securing economical efficiency through energy saving, reducing the labor cost by reducing the number of management personnel, and securing safety for the equipment and devices.

1 is a view for explaining a conventional air conditioner applied to an air conditioner. Referring to FIG. 1, the conventional air conditioner 1 is for keeping the room temperature pleasant and exhausting polluted indoor air, that is, indoor air to the outside, and supplying fresh outdoor air, that is, A first air supply chamber (30) for introducing outside air, a second air supply chamber (40) for supplying outside air passing through the first air supply chamber (30) to the room, a first exhaust chamber (10) A second exhaust chamber 20 for exhausting the inside air passing through the first exhaust chamber 10 to the outside, an inside air flowing into the second exhaust chamber 20 from the first exhaust chamber 10, (43) for forcibly sucking the outside air into the room, and an exhaust fan (43) for forcibly discharging the inside air to the outside of the room And an exhaust fan 23.

In such a conventional air conditioner, both the air supply fan and the exhaust fan must be operated in order to keep the indoor pressure constant, and thus there is a problem that power consumption is large and power is wasted.

Korean Patent Publication No. 10-2017-0075385

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioning system having a function of maintaining a positive pressure to increase the energy efficiency by significantly reducing the operating rate of the exhaust fan.

According to an aspect of the present invention, A sub space part surrounded by an outer wall of the main space part and separated from the main space part; A main damper provided on an outer wall of the main space part; A sub damper provided on an outer wall of the sub space part; A ventilation device installed in the sub space part and having an air supply fan for introducing the outside air into the main space part and an exhaust fan for exhausting the inner space of the main space part to the sub space part; A main pressure measuring unit for measuring a room pressure of the main space part; A sub pressure measuring unit measuring an internal pressure of the sub space part; An outside air temperature measuring unit for measuring the outside air temperature; And selectively controlling the operation of the air supply fan and the exhaust fan according to the outdoor temperature transmitted from the outdoor temperature measurement unit and selectively controlling whether the main damper is open or closed according to the indoor pressure received from the main pressure measurement unit And a control unit for selectively controlling whether the sub damper is open or closed according to an internal pressure transmitted from the sub pressure measuring unit.

The control unit operates the air supply fan of the ventilator when the outside air temperature transmitted from the outside air temperature measurement unit is between a predetermined upper limit temperature and a predetermined lower limit temperature, The main damper is opened to vent the air in the main space to the sub-space, and when the sub-pressure measured by the sub-pressure measurer is less than the preset reference room pressure, And controls the sub-damper to open so that the air in the sub-space is discharged to the outside when the pressure is equal to or higher than a predetermined reference internal pressure.

The main damper includes three or more sub-dampers along the outer wall of the main space. The sub-damper includes a first sub-damper and a second sub-damper provided on one side and the other side of the outer wall of the sub- The sub-damper is opened by the sub-pressure measuring unit irrespective of the bit pressure measured by the sub-pressure measuring unit, and the second sub-damper is opened by the sub-pressure measuring unit when the air supply fan is operated and the exhaust fan is stopped, When the measured bit pressure is equal to or greater than a preset reference bit pressure, controls to open the air-conditioning system.

The control unit may further include a temperature and humidity control unit installed in the main space, and the control unit stops the air supply fan and the exhaust fan when the outside air temperature transmitted from the outside air temperature measurement unit exceeds a predetermined upper limit temperature And an air conditioning system having a positive pressure holding function, wherein the thermo-hygrostat is operated.

Also, the ventilator may include an total enthalpy heat exchanger for exchanging heat between the outside air and the inside air, and the control unit may operate the air supply fan and the exhaust fan when the outside air temperature is lower than a predetermined lower limit temperature, To the main space part, and the exhaust gas is exhausted to the sub space part through the total enthalpy heat exchanger.

In the present invention, when the outdoor air temperature is a comfortable temperature which is not low or high, the air supply fan is operated and the exhaust fan is stopped to supply the outside air to the main space portion, and the inside air of the main space portion is pressurized by the outside air So that the operating rate of the exhaust fan can be reduced and the energy efficiency can be improved.

In addition, since the air in the main space portion is not immediately discharged to the outside but is discharged to the outside after being moved to the sub space portion, the main space portion always maintains an appropriate positive pressure, There is an effect that it is not arbitrarily introduced into the space portion.

In addition, when the outside air is hot air, the outside air is not introduced into the room, and the inside air of the main space is circulated by using the thermo-hygrostat, and the temperature and humidity are controlled appropriately. There is an effect that the energy efficiency can be increased.

1 is a view for explaining a conventional air conditioner applied to an air conditioner.
2 is a plan view schematically illustrating an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention.
3 is a block diagram illustrating a main configuration of an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention.
FIGS. 4 and 5 are flowcharts illustrating the operation of an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention.

Hereinafter, an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a plan view schematically showing an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention, and FIG. 3 is a block diagram showing a main configuration of an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention Fig.

2 and 3, an air conditioning system 100 having a positive pressure holding function according to a preferred embodiment of the present invention includes a main space portion 102, a subspace portion 104, a main damper 103a, A main pressure measuring unit 120, a sub pressure measuring unit 130, an outside air temperature measuring unit 110, and a controller 170.

The main space unit 102 refers to a normal indoor space provided in a building, and may include an IT room, a computer room, and the like, in which a room temperature must be kept constant. A main outer wall 103 is formed along the rim of the main space portion 102. The sub space 104 is surrounded by the main outer wall 103 of the main space part 102 and is separated from the main space part 102. Sub-outer wall 105 is formed along the rim of sub-space 104. That is, the present invention is characterized in that a main space portion 102 forming an interior space such as a computer room and a main space portion 102 outside the main outer wall 103 are provided on the inside of the main outer wall 103 with the main outer wall 103 therebetween. And a sub-space 104 forming an independent inner space separate from the sub-space 102.

The main damper 103a is formed in the main outer wall 103 and selectively discharges the indoor air in the main space 102 to the subspace 104 under the control of the control unit 170, For example, four along a main outer wall 103 whose cross section is formed in a quadrangle. The main damper 103a may be formed so as to be larger than the sub damper described later.

The sub damper is formed in the sub outer wall 105 to selectively discharge the air in the sub space 104 under the control of the controller 170. The sub damper may be a sub outer wall The sub damper includes a first sub damper 105a provided on one side of the sub outer wall 105 and a second sub damper 105b provided on the other side of the sub outer wall 105 do.

The ventilation device 180 is installed in the sub space part 104, and its detailed structure is similar to the air conditioning device shown in Fig. The ventilation device 180 includes a first air supply portion 184a and a second air supply portion 182a provided on one side of the casing 182 facing the sub outer wall 105, A first exhaust portion 186a provided in the other side of the casing 182 facing the main outer wall 103 and a second exhaust portion 184b provided in the other side of the casing 182 facing the main outer wall 103; An air supply fan 185 installed in the first air supply unit 184a or the second air supply unit 184b and an exhaust fan 185 installed in the first exhaust unit 186a or the second exhaust unit 186b 186).

When the air supply fan 185 is operated, outdoor air, that is, ambient air flows into the main space portion 102 through the first supply portion 184a and the second supply portion 184b. A first extension part (not shown) is formed in the first supply part 184a in the direction of the sub outer wall 105 and a second extension part (not shown) is formed in the second supply part 184b in the direction of the main outer wall 103, Is formed.

When the exhaust fan 186 is operated, the inner space of the main space portion 102 is exhausted to the subspace portion 104 through the first exhaust portion 186a and the second exhaust portion 186b. To this end, a third extension (not shown) is formed in the first exhaust portion 186a in the direction of the main outer wall 103. [

When the air supply fan 185 and the exhaust fan 186 operate simultaneously, the outside air flows into the main space portion 102 through the total enthalpy heat exchanger, and the air flows into the subspace portion 104 through the total enthalpy heat exchanger, , Heat exchange between the outside air and the inside air proceeds in the total enthalpy heat exchanger. The total enthalpy heat exchanger is constituted such that a flow path for the inner air and a flow path for the ambient air move alternately are formed so that heat exchange is possible between the inner and outer air.

The main pressure measuring unit 120 is installed inside the main outer wall 103 to measure a room pressure of the main space unit 102 and transmits the measured room pressure to a control unit 170 to be described later. The sub pressure measuring part 130 is installed inside the sub outer wall 105 to measure the inner pressure of the sub space part 104 and transmits the measured inner pressure to the control part 170 described later. The outside temperature measuring unit 110 is installed outside the sub outside wall 105 provided outside the building to measure the temperature of the outside air and transmits the measured outside air temperature to the controller 170.

The thermo-hygrostat 140 is operated under the control of the controller 170 and may be installed in the main space 102 and connected to the ventilator 180. The thermo-hygrostat 140 has a general structure in which the inner space of the main space portion 102 flows into the inner space of the main space portion 102, and the temperature and humidity are adjusted to be discharged to the main space portion 102.

The control unit 170 selectively controls the operation of the air supply fan 185 and the exhaust fan 186 according to the outside air temperature transmitted from the outside air temperature measuring unit 110, And selectively controls whether or not the sub damper is opened according to the internal pressure transmitted from the sub pressure measuring unit 130. [ The control unit 170 controls the supply fan drive unit 150 to operate the supply fan 185 according to the control signal of the controller 170, the exhaust fan drive unit 152 to operate the exhaust fan 186, the main damper A first sub damper driving portion 162a for opening the first sub damper 105a and a second sub damper driving portion 162b for opening the second sub damper 105b . An electric door (not shown) is provided in the main damper 103a to open or close the main damper 103a while the electric door is rotated by a signal from the main damper driving unit 160. [ The open principle of the first and second sub dampers 105a and 105b is also the same.

FIGS. 4 and 5 are flowcharts illustrating the operation of an air conditioning system having a positive pressure holding function according to a preferred embodiment of the present invention.

Referring to FIG. 4, first, the outside air temperature measuring unit 110 measures the outside air temperature and transmits the measured outside air temperature to the controller 170 (S100). The control unit 170 determines whether the outside air temperature exceeds the upper limit temperature (S110). Here, the upper limit temperature refers to the highest temperature at which the outside air can be directly introduced into the main space unit 102 without any other adjustment, and may be, for example, 25 ° C. In the case of hot air having an outside temperature exceeding the upper limit temperature as in the summer, when the indoor air is introduced into the room, a large power consumption is required to lower the temperature of the air. The control unit 170 stops the air supply fan 185 and the exhaust fan 186 at steps S112 and S114 and activates the constant temperature and humidity control unit 140 at step S116 so that the constant temperature The humidity sensor 140 controls the inner space of the main space portion 102 to a proper temperature and humidity.

As described above, in the case of hot air having an outside temperature exceeding the upper limit temperature, the outside air is not introduced into the room, but the inside air is circulated by using the thermo-hygrostat 140, There is no need to use separate electric power for lowering the air, so that the energy efficiency can be increased.

If it is determined in step S110 that the outside air temperature is lower than the upper limit temperature, the controller 170 determines whether the outside air temperature is lower than the lower limit temperature (S120). Herein, the lower limit temperature refers to the lowest temperature at which the outside air can be directly introduced into the main space unit 102 without any other adjustment, and may be, for example, 15 ° C. If the outside air temperature is cold air exceeding the lower limit temperature as in the winter season, the controller 170 operates the air supply fan 185 and the exhaust fan 186 (S122 and S124). The outside air then passes through the first air supply unit 184a of the ventilator 180 and the total air heat exchanger and the second air supply unit 184b in order and the air is supplied to the main space unit 102, And is exhausted to the subspace portion 104 through the first exhaust portion 186a, the total enthalpy heat exchanger, and the second exhaust portion 186b. At this time, heat exchange between the outside air and the inside air proceeds in the total enthalpy heat exchanger inside the ventilator 180, and the outside air that is supplied to the main space part 102 through the total enthalpy heat exchanger passes through the outdoor air temperature measured by the outside air temperature measuring part 110 It is supplied in a slightly elevated state. If the temperature of the outside air to be supplied to the main space 102 after the heat exchange progresses is still cold air exceeding the lower limit temperature, the temperature inside the main space part 102 is appropriately adjusted using the thermo-hygrostat 140 .

Referring to FIG. 5, in step S120 shown in FIG. 4, when the outside air temperature is equal to or higher than the lower limit temperature, the controller 170 determines that the outside air temperature is between the upper and lower temperatures, It is determined that the main space 102 can be directly introduced (S130). Thereafter, the controller 170 operates the air supply fan 185 and stops the exhaust fan 186 to allow the outside air to flow into the main space 102 (S132, S133).

The control unit 170 receives the room pressure data of the main space unit 102 from the main pressure measurement unit 120 and outputs the indoor pressure data of the main room unit 102 to the indoor pressure And determines whether or not the pressure is equal to or higher than the preset reference room pressure (S134). As a result of the determination, when the indoor pressure of the main space unit 102 is equal to or higher than a predetermined reference indoor pressure, the main damper driving unit 160 transmits a control signal to control the main damper driving unit 160 to open the main damper 103a (S135). Then, the control unit 170 transmits a control signal to the first sub-damper driving unit 162a to control the first sub-damper driving unit 162a to open the first sub-damper 105a (S136). The inner space of the main space portion 102 is filled with the inner space of the main damper 103a when the room pressure of the main space portion 102 is increased to be higher than the reference room pressure, To the sub-space portion 104 through the opening. The exhausted air to the sub space 104 is exhausted to the outside through the first sub damper 105a. Since the amount of air exhausted from the main damper 103a to the subspace 104 is larger than the amount of air exhausted from the subspace 104 due to the fact that the number of the main damper 103a is four while the number of the first sub damper 105a is one, So that the main space portion 102 maintains a proper pressure. Since the air in the main space portion 102 is not immediately discharged to the outside but is discharged to the outside after being moved to the subspace portion 104, the main space portion 102 always maintains an appropriate positive pressure, The air does not flow into the main space part 102 through the window frame or the door opening of the building. The air supply fan 185 is operated and the exhaust fan 186 is stopped to supply the outside air to the main space portion 102 and the inside air of the main space portion 102 is supplied to the main space portion 102 So that the operation efficiency of the exhaust fan 186 can be reduced and energy efficiency can be improved.

The control unit 170 receives internal pressure data of the subspace 104 from the sub pressure measuring unit 130 as the internal space of the main space unit 102 flows into the subspace 104, It is determined whether or not the internal pressure of the unit 104 is equal to or higher than a preset reference internal pressure (S137). As a result of the determination, when the internal pressure of the sub space 104 is equal to or higher than the preset reference internal pressure, the second sub-damper driver 162b transmits a control signal to the second sub-damper driver 162b, (S138). Accordingly, when the internal pressure of the sub-space portion 104 is increased to be higher than the reference internal pressure due to an excessive amount of air flowing into the sub-space portion 104, the air in the sub- The dampers 105a and 105b are all opened to allow the air in the sub space 104 to be rapidly exhausted to the outside.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It should be understood that the technical idea belonging to the scope of the claims also belongs to the present invention.

100: Air conditioning system with positive pressure holding function
102: main space part 103: main outer wall
103a: main damper 104: sub-
105: sub outer wall 105a: first sub damper
105b: second sub damper 110: outside air temperature measuring unit
120: main pressure measuring part 130: sub pressure measuring part
140: Constant temperature and humidity unit 150: Supply fan drive unit
152: exhaust fan driving part 160: main damper driving part
162a: first sub-damper driving portion 162b: second sub-
170: control unit 180: ventilation device
182: casing 184a:
184b: a second supply unit 185: an air supply fan
186a: first exhaust part 186b: second exhaust part
186: Exhaust fan

Claims (5)

A main space provided in a room of a building;
A sub space part surrounded by an outer wall of the main space part and separated from the main space part;
A main damper provided on an outer wall of the main space part;
A sub damper provided on an outer wall of the sub space part;
A ventilation device installed in the sub space part and having an air supply fan for introducing the outside air into the main space part and an exhaust fan for exhausting the inner space of the main space part to the sub space part;
A main pressure measuring unit for measuring a room pressure of the main space part;
A sub pressure measuring unit measuring an internal pressure of the sub space part;
An outside air temperature measuring unit for measuring the outside air temperature; And
And selectively controlling the operation of the air supply fan and the exhaust fan according to the outdoor temperature transmitted from the outdoor temperature measurement unit and selectively controlling whether the main damper is open or closed according to the indoor pressure received from the main pressure measurement unit And a control unit for selectively controlling whether the sub damper is open or closed according to an internal pressure transmitted from the sub pressure measuring unit,
The control unit operates the air supply fan of the ventilator and stops the exhaust fan of the ventilator when the temperature of the outside air received from the outside air temperature measurement unit falls between a predetermined upper limit temperature and a predetermined lower limit temperature Wherein when the indoor pressure measured by the main pressure measuring unit is equal to or greater than a predetermined reference indoor pressure, the main damper is opened to vent the air in the main space to the sub-space, and the internal pressure measured by the sub- Wherein the sub-damper is opened to discharge the air in the sub-space to the outside when the pressure is equal to or higher than a preset reference internal pressure.
delete The method according to claim 1,
Wherein the main damper is composed of three or more pieces along an outer wall of the main space portion,
Wherein the sub damper includes a first sub damper and a second sub damper provided on one side and the other side of the outer wall of the sub space part,
The sub-damper is opened by the sub-pressure measuring unit irrespective of the bit pressure measured by the sub-pressure measuring unit, and the second sub-damper is opened by the sub-pressure measuring unit when the air supply fan is operated and the exhaust fan is stopped, And when the measured bit pressure is equal to or greater than a predetermined reference bit pressure, controls to open the air-conditioning system.
The method according to claim 1,
Further comprising a thermo-hygrostat provided in the main space part,
Wherein the controller stops the air supply fan and the exhaust fan when the temperature of the outside air transmitted from the outside air temperature measuring unit exceeds a predetermined upper limit temperature and activates the constant temperature / Air conditioning system.
The method according to claim 1,
Wherein the ventilating apparatus includes an enthalpy heat exchanger for exchanging heat between the outside air and the inside air,
Wherein the control unit operates the air supply fan and the exhaust fan to allow the outside air to flow into the main space portion through the total enthalpy heat exchanger when the outside air temperature is lower than a predetermined lower limit temperature, And the air is exhausted to the outside.

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