KR101958560B1 - A Cool Storage type Cooling Apparatus System using Outdoor Air - Google Patents

Abstract

The cooling system includes a main cooling unit for generating cooling air by external power to cool the inside of a space to be cooled, a room temperature sensor for measuring a room temperature inside the target space, An outdoor temperature sensor for measuring an outdoor temperature outside the object space; a temperature sensor installed outside the object space for storing cold air of the outdoor air, or a cold cooling mode for supplying the stored cold air to the interior of the object space And a control unit for operating the main cooling unit when the room temperature is equal to or higher than the first set temperature, and for reducing the cooling load of the main cooling unit when the outdoor temperature is lower than the first set temperature A control for controlling the auxiliary cooling section to operate in any one of a cooling mode or a cooling mode In that it comprises the features.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air cooling system using an air conditioner,

[0001] The present invention relates to a cooling-type air conditioner system using outside air, and more particularly, to a room where a four-season air conditioner is required, such as a computer room or a communication base station, an air conditioner or a thermoelectric element In the winter season where the temperature of the outdoor air is low, the cooling is performed by using the cold air of the outdoor air, so that the electric energy consumed for cooling the object space can be remarkably reduced The present invention relates to a cooling-type air conditioner system using outside air.

The cooling of the indoor space of a building or a house is generally performed by a refrigerant compression type cooling system (that is, a normal air conditioner), an ice cooling system using nighttime power, a cooling system using a thermoelectric element, an absorption type cooling system, And the cooling air generated by consuming electric energy is supplied to an indoor space requiring cooling.

On the other hand, in the case of a computer room or a communication base station, in order to prevent expensive servers or communication equipment from being damaged or malfunctioning due to overheating, it is required that the room temperature is maintained within a set temperature range during all seasons. There has been a problem in that the consumption of electrical energy is excessively increased because the cooling is performed by using a cooling device that consumes electric energy to generate cool air as described above.

Therefore, recently, as disclosed in [1] and [2] below, in order to reduce the electric energy consumption required for cooling the space required for four seasons, external air having low temperature is introduced into the room In the case of the cooling system according to [1], [2], and the like, a damper for introducing outside air is opened to directly introduce outside air having a low temperature into a room having a relatively high temperature Therefore, expensive computer servers and communication equipment installed inside the indoor space are damaged by the condensation due to the temperature difference or thermal shock.

In the cooling system according to the following [1], even when the temperature difference between the outside air and the inside space is not large, since the outside air directly flows into the inside of the inside space, fine dust, yellow dust, So that there is a problem that the server and the communication equipment are damaged.

[Patent Document 1] Korean Patent No. 10-1682332 (issued on December 12, 2016)

[Patent Document 2] Published Korean Patent Application No. 2013-0064427 (published on June 18, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an air conditioner, a thermoelectric element, and the like, which usually use refrigerant for an object space requiring four- And the cooling air is cooled by using the cooling air of the outdoor air in the winter season where the temperature of the outdoor air is low, so that the electric energy consumed for the cooling of the target space is significantly And to provide a cooling-type air conditioner system using outside air that can be reduced.

It is another object of the present invention to provide a method of controlling the outdoor heat exchanger in which outdoor air is cooled by exchanging heat between the outdoor air and the refrigerant in a state where indoor air is shut off during the cooling using the outdoor air, And the cold air stored by the heat exchange between the axial coolant and the indoor air is supplied to the indoor space, so that the condensation due to the temperature difference, the thermal shock, or the contamination of the contaminant The present invention is intended to provide a cooling-type air conditioner system using outside air that can prevent a dangerous factor that may damage facilities such as the air conditioner.

In order to accomplish the above object, the present invention provides a cooling-type air conditioner system using outside air, comprising: a main cooling unit for generating cooling air by external power to cool the inside of a target space requiring cooling; A temperature sensor unit including an indoor temperature sensor for measuring outdoor air temperature and an outdoor temperature sensor for measuring an outdoor temperature outside the object space; a hot air cooling mode for storing cold air of outdoor air installed outside the object space; And a controller for controlling the main cooling unit when the indoor temperature is equal to or higher than a predetermined first set temperature, wherein the main cooling unit is operated when the outdoor temperature is lower than the first set temperature, In order to reduce the cooling load of the cooling unit, the auxiliary cooling unit may be provided in any one of the cooling mode or the cooling mode It characterized in that a control unit for controlling to operate to the previous mode.

The subcooling portion may include a first air inlet and a first air outlet formed on the outside of the target space and communicating with the inside of the target space, and a second air inlet and a second air outlet communicating with the outside of the target space, A damper module that opens and closes the first exhaust port, the first exhaust port, the second exhaust port, and the second exhaust port, and a damper module that opens and closes the inside of the auxiliary outdoor unit main body An indoor air blowing fan installed in the auxiliary outdoor unit body for discharging indoor air sucked through the first suction port to a first exhaust port and outdoor air sucked through the second air inlet port to a second exhaust port And the control unit closes the first air inlet and the first air outlet when the outdoor temperature is lower than the first set temperature While opening the second inlet and the second outlet port is characterized in that control to operate in chuknaeng mode of operating the outdoor air blower fan.

The temperature sensor unit may further include an outdoor air exhaust temperature measuring unit that measures an outdoor air exhaust temperature that is a temperature of outdoor air flowing through the second intake port and exchanging heat with the hot-water storage heat exchanger through the second exhaust port, Wherein the control unit determines whether or not there is an auxiliary cooling unit that has been cooled by using the outdoor air exhaust temperature and if there is an auxiliary cooling unit that has been cooled, the auxiliary cooling unit opens the first and the second exhaust ports The indoor air blowing fan is operated in a cooling mode in which the second air inlet and the second air outlet are closed and the remaining auxiliary cooling unit is operated in the cooling mode.

The temperature sensor unit may further include an indoor air exhaust temperature measuring unit for measuring an indoor air exhaust temperature, which is a temperature of room air introduced through the first intake port and heat-exchanged with the hot-water storage heat exchanger through the first exhaust port, Wherein the auxiliary cooling unit is operated in the cooling mode when the indoor air exhaust temperature is equal to or higher than the predetermined second set temperature and the auxiliary cooling unit is operated in the cooling mode, Mode so as to be operated.

In the case of the auxiliary cooling unit operating in the cooling mode, the control unit may control the outdoor air in the state that at least one of the first air inlet and the first air outlet and the second air outlet are opened for a predetermined time before the air conditioner is operated in the cooling mode, And controls the blower fan to operate in a purge mode in which outdoor air in the auxiliary outdoor unit main body is discharged to the outside.

The control unit controls the rotation speed of the outdoor air blowing fan faster than the indoor air blowing fan so that the cooling mode can be completed faster than the cooling mode. The auxiliary cooling unit, which has been cooled in the middle of operation in the cooling mode, And the operation is stopped until the operation is performed.

In addition, the above-mentioned hot-water-cooled heat exchanger is formed by laminating a plurality of plate-shaped unit heat exchange plates formed with a hollow at the center and filled with a cooling material therein, and having a tubular air passage formed at the center thereof by the hollow, The auxiliary cooling section further includes a tubular outdoor air intake guide for connecting the second inlet port and one end of the air flow path and a tubular outdoor air exhaust guide for connecting the other end of the air flow path to the second exhaust port .

In addition, the end portions of the outdoor air intake guide and the outdoor air exhaust guide, which are connected to the air flow path, are each formed in a cross-sectional shape of the air flow path and have a tubular coupling protrusion that is fitted to the inner surface of the air flow path.

The present invention relates to a cooling-type air conditioner system using outside air, which includes a main air-cooling unit for cooling a target space by using cold air generated by external power, a first damper unit, a first fan, a second damper unit, 2 blowing fans, and a plurality of auxiliary cooling units including a cold-storage heat exchanger, so that the cooling is normally performed using the main cooling unit for a target space requiring four-season cooling, such as an IT room or a communication base station, In the winter season when the temperature of the air is low, cooling is performed by using the cooling air of outdoor air by the auxiliary cooling unit, so that the electric energy consumed for cooling the target space can be remarkably reduced.

In addition, in the cooling system using outside air according to the present invention, when the outdoor air is used for cooling, the first and second dampers and the first and second blowing fans of the auxiliary cooling unit are controlled to shut off the indoor air, The cold air of the outdoor air is stored in the hot-water heat exchanger by the heat exchange of the hot-air coolant, and then the cold air stored by the heat exchange between the hot-water heat exchanger and the indoor air is supplied to the indoor space Which can damage the equipment such as condensation, thermal shock, or contamination due to a temperature difference that may be generated by the outdoor air being directly introduced into the indoor space, There is an advantage.

In addition, in the cooling-and-cooling system using the outside air according to the present invention, the auxiliary cooling unit may be configured to perform the purge mode in which the room air is sucked and discharged to the outside for a predetermined time before the cooling mode is performed, The outdoor air flow path and the indoor air flow path are separated from each other, thereby effectively preventing the outdoor air from being directly introduced into the indoor space.

FIGS. 1A to 1D are diagrams for explaining the overall configuration and the operation mode of an air cooling system using outside air according to a first embodiment of the present invention,
FIG. 2 is a block diagram for explaining an operation configuration of a cooling-and-cooling system using an outside air according to a first embodiment of the present invention; FIG.
FIG. 3 is a flow chart for explaining a control method of a cooling-and-cooling system using an outside air according to a first embodiment of the present invention;
FIG. 4 is a view for explaining a configuration of an auxiliary cooling unit of an air-cooling system using an outside air according to a second embodiment of the present invention;
5 is a sectional view taken along the line AA in Fig. 4,
6A and 6B are views for explaining the structure of a unit heat exchange plate constituting the superheated heat exchanger and the superheated heat exchanger shown in FIG. 4,
Fig. 7 is a view for explaining a configuration of the outdoor air intake guide shown in Fig. 4. Fig.

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

(Embodiment 1)

FIGS. 1A to 1D are views for explaining the overall configuration and operation of each air conditioning system using the outside air according to the first embodiment of the present invention, FIG. 3 is a flowchart illustrating a control method of a cooling-and-cooling system using an outside air according to a first embodiment of the present invention.

The cooling system system using the outside air according to the first embodiment of the present invention includes a main cooling unit 10 installed at one side of a target space 1a separated from the outside by a wall 1, And a plurality of auxiliary cooling units 20 and 30 installed on the other side of the main cooling unit.

In this case, the object space 1a may be an office space or a residential space such as a general building or a house, or a space requiring four-seasons cooling, such as an IT department or a communication base station. In this embodiment, A communication base station in which the communication equipment 2 is installed will be described as an example.

As described above, the object space 1a according to the present embodiment is generally required to be cooled four seasons in order to prevent an electric element or an electronic element constituting the communication equipment 2 from being damaged or malfunctioned by operating heat. The present invention is characterized in that the main cooling unit 10 and the auxiliary cooling units 20 and 30 are operated in combination or selectively according to the room temperature and the outdoor temperature.

First, the main cooling unit 10 may be any of a cooling-type cooling apparatus, a cooling apparatus using a thermoelectric element, an ice-cooled and water-cooled cooling apparatus using night-time power, or an apparatus for generating cold air by consuming external power, In the present embodiment, for example, the main cooling section 10 is constituted by a normal refrigerant compression type cooling apparatus.

The main cooling unit 10 includes an indoor unit 11 installed inside the target space 1a and an outdoor unit 12 installed outside the target space 1a. And the outdoor unit (12) are configured to constitute a closed circuit by a pipe through which the refrigerant flows.

The outdoor unit 12 includes a compressor 12a for compressing low-temperature gaseous refrigerant into high temperature liquid refrigerant and a condenser 12b for exchanging the compressed refrigerant with outdoor air. The indoor unit 11 Includes an evaporator 11a for exchanging the low temperature liquid refrigerant that has passed through the expansion device (not shown) with room air to supply cool air to the target space 1a.

 Since the cycle structure and operation principle of the refrigerant compression type cooling apparatus are well known in the art, a description thereof will be omitted here.

In the meantime, a plurality of cooling fans are provided outside the space 1a for the auxiliary cooling units 20 and 30 so as to store the cool air of the outdoor air as described later, and a cooling mode for storing the stored cool air inside the target space 1a In the present embodiment, for convenience of explanation, the auxiliary cooling units 20 and 30 are connected to the first auxiliary cooling unit 20 and the second auxiliary cooling unit 20, And the second sub cooling section 30 will be described as an example.

The first sub cooling unit 20 includes a first sub outdoor unit main body 21 in the form of a closed housing provided at an outer side of the target space 1a, And a first supercooled heat exchanger (28) installed midway.

A first indoor air intake port 22b and a first indoor air exhaust port 22a are formed at one side of the first sub outdoor unit body 21 to communicate with the interior of the target space 1a, A first outdoor air intake port 24a and a first outdoor air exhaust port 24b communicating with the outside of the first outdoor air outlet 1a are formed.

The first indoor air intake port 22b and the first indoor air exhaust port 22a are preferably provided on the front and rear sides of the first supercooled heat exchanger 28. The first indoor air intake port 22b and the first indoor air exhaust port 22a are provided before and after the first supercooled heat exchanger 28, And the first outdoor air discharge port 24b are also provided before and after the first coaxial heat exchanger 28, respectively.

The first subcooling portion 20 includes the first indoor air intake port 22b, the first indoor air exhaust port 22a, the first outdoor air intake port 24a, and the first outdoor air exhaust port 24b. A pair of first and second refrigerant heat exchangers 28a and 28b installed in front of and behind the first supercooled refrigerant heat exchanger 28 in the first auxiliary outdoor unit body 21, respectively; first damper units 23a, 23b, 25a and 25b for opening / 1 blowing fans 26 and 27, respectively.

At this time, the first damper portions 23a, 23b, 25a, and 25b include a first indoor air intake damper 23b for opening and closing the first indoor air intake port 22b, a second indoor air intake damper 23b for opening and closing the first indoor air exhaust port 22a, A first outdoor air intake damper 25a for opening and closing the indoor air exhaust damper 23a and a first outdoor air intake port 24a and a first outdoor air exhaust damper 25b for opening and closing the first outdoor air exhaust port 24b, The first damper units 23a, 23b, 25a and 25b are preferably of the electric type.

The first blowing fan 26 and the first blowing fan 27 discharge the indoor air sucked through the first indoor air intake port 22b to the inside of the target space 1a through the first indoor air exhaust port 22a. An air blowing fan 26 and a first outdoor air blowing fan 27 for discharging the outdoor air sucked through the first outdoor air intake port 24a to the outside through the first outdoor air exhaust port 24b, do.

The second sub cooling unit 30 includes a second sub outdoor unit main body 31 in the form of a closed housing provided at the other side of the target space 1a, And a second refrigerated heat exchanger (38) installed in the middle.

A second indoor air intake port 32b and a second indoor air exhaust port 32a are formed at one side of the second auxiliary outdoor unit body 31 to communicate with the interior of the target space 1a, A second outdoor air inlet port 34a and a second outdoor air outlet port 34b communicating with the outside of the first outdoor air outlet port 1a are formed.

The second indoor air intake port 32b and the second indoor air exhaust port 32a are preferably provided on the front and rear sides of the second coaxial heat exchanger 38. The second outdoor air intake port 34a And the second outdoor air exhaust port 34b are also provided before and after the second supercooled heat exchanger 38, respectively.

The second subcooling portion 30 includes the second indoor air intake port 32b, the second indoor air exhaust port 32a, the second outdoor air intake port 34a, and the second outdoor air exhaust port 34b. 33b, 35a, and 35b that open and close the first and second supercooled refrigerant heat exchangers 38 and 38, respectively, and a pair of damper units 33a, 33b, 35a, 2 blowing fans (36, 37).

At this time, the second damper portions 33a, 33b, 35a, and 35b include a second indoor air intake damper 33b for opening and closing the second indoor air intake port 32b, a second indoor air intake damper 33b for opening and closing the second indoor air exhaust port 32a, A second outdoor air intake damper 35a for opening and closing the second outdoor air intake port 34a and a second outdoor air exhaust damper 35b for opening and closing the second outdoor air exhaust port 34b, The second damper units 33a, 33b, 35a, and 35b are preferably of the electric type like the first damper unit.

The second air blowing fan 36 and the second air blowing fan 37 are disposed in the second room for discharging the room air sucked through the second room air inlet port 32b into the target space 1a through the second room air outlet 32a. An air blowing fan 36 and a second outdoor air blowing fan 37 for discharging the outdoor air sucked through the second outdoor air intake port 34a to the outside through the second outdoor air exhaust port 34b, do.

In addition, the cooling-and-cooling system using the outside air according to the present embodiment further includes a temperature sensor unit for measuring the temperature of the indoor air and the outdoor air. The temperature sensor unit measures the indoor temperature inside the object space 1a An outdoor temperature sensor 4 for measuring an outdoor temperature outside the object space 1a, an indoor temperature sensor 3 for measuring an outdoor temperature of the indoor air and outdoor air discharged from the first auxiliary cooling section 20, First exhaust temperature sensors 26a and 27a and second exhaust temperature sensors 36a and 37a for measuring the exhaust temperatures of indoor air and outdoor air discharged from the second subcooling unit 30. [

The first exhaust temperature sensors 26a and 27a flow through the first indoor air intake port 22b and exchange heat with the first refrigerated heat exchanger 28 and then through the first indoor air exhaust port 22a A first indoor air exhaust temperature sensor 26a for measuring an indoor air exhaust temperature which is a temperature of indoor air discharged into the subject space 1a and a second indoor air exhaust temperature sensor 26b for entering through the first outdoor air intake port 24a, A first outdoor air exhaust temperature sensor 27a for measuring an outdoor air exhaust temperature which is a temperature of outdoor air discharged from the target space 1a through the first outdoor air exhaust port 24b after heat exchange with the first outdoor air exhaust port 24a, .

At this time, the first indoor air exhaust temperature sensor 26a and the first outdoor air exhaust temperature sensor 27a are connected to the first indoor air blowing fan 26 and the first outdoor air blowing fan 27, respectively, It is more preferable to be installed on the outlet side of the gasket.

The second exhaust temperature sensors 36a and 37a flow through the second indoor air intake port 32b and exchange heat with the second condensed water heat exchanger 38 and then through the second indoor air exhaust port 32a A second indoor air exhaust temperature sensor 36a for measuring an indoor air exhaust temperature which is a temperature of indoor air discharged into the object space 1a and a second indoor air exhaust temperature sensor 36b for entering through the second outdoor air intake port 34a, A second outdoor air exhaust temperature sensor 37a for measuring an outdoor air exhaust temperature which is the temperature of the outdoor air discharged from the subject space 1a through the second outdoor air exhaust port 34b after the heat exchange with the second outdoor air exhaust port 34b, .

At this time, the second indoor air exhaust temperature sensor 36a and the second outdoor air exhaust temperature sensor 37a are also connected to the second indoor air blowing fan 36 and the second outdoor air blowing fan 37 In the present invention.

The cooling unit system using the outdoor unit according to the present invention further includes a control unit 100 for controlling the operation of each component. The control unit 100 includes a temperature sensor unit 3, 4, 26a, 27a 23a, 23b, 25a, and 25b according to an algorithm previously stored in the memory unit 110 using the indoor air temperature and the outdoor air temperature measured in the main cooling unit 10, The second damper units 33a, 33b, 35a, and 35b, the first blowing fans 26 and 27, and the second blowing fans 36 and 37, respectively.

The control unit 100 controls the indoor temperature T _in of the object space 1a using the indoor temperature sensor 3. The control unit 100 controls the indoor temperature T _in , (S10), and it is determined whether the measured room temperature T _in is _equal to or greater than a preset first set temperature T _set1 (S20).

The first set temperature T _set1 corresponds to the target set temperature of the target space 1a and prevents the communication equipment 2 installed inside the target space 1a from deteriorating due to high temperature, 2) in order to maintain the soundness of the heat exchanger.

Whereas if If the judgment at room temperature (T _in) of the step S20 is less than the first predetermined temperature (T _set1), the controller 100 ends the control determines that the air-conditioning is unnecessary state, the room temperature (T _in) is If it is equal to or greater than the first preset temperature _Tset1 , the main cooling unit 10 is driven to perform cooling of the target space 1a (S30).

When the S30 step is completed, the control unit 100 by using the outdoor temperature sensor 4 measures the target space (1a) of the outer outside temperature (T _out) (S40), the measured outdoor temperature (T _out) (T _set2 ) (S50).

At this time, the second set temperature T _set2 may be set to the same temperature as the first set temperature T _set1 as a temperature that can be cooled by outdoor air, but it may be set to a first predetermined temperature T to be set to a temperature of less than _set1) is more preferred.

If it is determined in step S50 that the outdoor temperature T _out is equal to or higher than the second set temperature T _set2 , the controller 100 maintains the cooling by the main cooling unit 10 and terminates the control. On the other hand, (T _out ) is less than the second set temperature T _set2 , the auxiliary cooling sections 20 and 30 are operated in the cooling mode (S60).

As shown in FIG. 1B, the controller 100 controls the outdoor air intake ports 24a and 34a and the outdoor air exhaust ports 24b and 34b of the auxiliary cooling units 20 and 30 to open The outdoor air flowing inside the auxiliary outdoor units main body 21 and 31 is heat-exchanged with the hot-water storage heat exchangers 28 and 38, And is stored in the axial coolant in the cold-storage heat exchangers (28, 38).

In this case, the controller 100 closes the indoor air intake ports 22b, 32b and the indoor air exhaust sections 22a, 32a of the respective auxiliary cooling sections 20, 30 so that outdoor air flows into the target space 1a Thereby preventing the inflow.

In addition, the axial coolant may be formed of an axial coolant or a phase change material (PCM) made of ceramic or metal. In this embodiment, the axial coolant is made of a phase change material.

When the step S60 is completed, the control unit 100 determines whether there is an auxiliary cooling unit that has been cooled by using the outdoor air exhaust temperature measured by the outdoor air exhaust temperature sensors 27a and 37a (S70 and S80) In this case, the controller 100 may determine that the shaking is completed when the difference between the outdoor temperature T _out measured in step S40 and the outdoor air exhaust temperature is equal to or lower than a predetermined temperature difference.

If it is determined in step S80 that there is an auxiliary cooling section having completed the cooling operation, the control section 100 stops the operation of the main cooling section 10 and performs cooling by the auxiliary cooling sections 20 and 30 as described later (S90).

In the present embodiment, the operation of the main cooling unit 10 is stopped in step S90, but the present invention is not limited thereto. If necessary, during the cooling by the auxiliary cooling units 20 and 30, And may be configured to operate the main cooling unit 10 with a low cooling or intermittently operating.

When the step S90 is completed, the control unit 100 activates the auxiliary cooling unit, which has completed the cooling process, in the cooling mode (S100) and operates the remaining auxiliary cooling unit in the cooling mode (S110).

At this time, if it is determined in step S80 that there is a plurality of auxiliary cooling sections that have been cooled down, the control section 100 may operate some of the auxiliary cooling sections in the cooling mode and the remaining auxiliary cooling sections may maintain the cooling mode or stop the operation.

The controller 100 closes the outdoor air intake ports 24a and 34a and the outdoor air exhaust ports 24b and 34b of the auxiliary cooling section and controls the indoor air intake ports 22b and 32b and the indoor air exhaust ports 22a and 22b, The indoor air flowing inside the auxiliary outdoor units main body 21 and 31 is subjected to heat exchange with the hot-water storage heat exchangers 28 and 38, respectively, And the cool air of the stored outdoor air is supplied into the object space 1a.

In this case, in order to prevent the outdoor air remaining inside the auxiliary outdoor unit body from being directly introduced into the object space 1a, the auxiliary cooling unit operated in the air-cooling mode is operated for a predetermined time The outdoor air blowing fans 27 and 37 are operated while at least one of the inlet ports 22b and 32b and the indoor air exhaust ports 22a and 32a and the outdoor air exhaust ports 24b and 34b are opened, The outdoor air of the outdoor unit is discharged to the outside.

In the present embodiment, as a result of the determination in step S80, both of the first and second sub cooling units 20 and 30 are in a state of being fully cooled. In steps S100 and S110, the first sub cooling unit 20 is operated in the cooling mode And the second auxiliary cooling section 30 is operated in the cooling mode.

1C, the controller 100 controls the indoor air inlet 22b and the indoor air outlet 22a of the first subcooling unit 20 to open the first indoor air blowing fan 22a, The first auxiliary cooling section 20 is operated to operate the first auxiliary cooling section 26 and the second auxiliary cooling section 30 maintains the wholesale cooling mode. The first auxiliary cooling section 20 may be configured to perform the above- have.

When the step S110 is completed, the control unit 100 measures the indoor air exhaust temperature of the auxiliary cooling unit that is being cooled by using the indoor air exhaust temperature sensors 26a and 36a (S120). In this embodiment, The controller 100 measures the room air exhaust temperature of the first sub cooling unit 20 using the first indoor air exhaust temperature sensor 26a.

If the S120 step is finished, the control unit 100 there is a judgment whether or not the room air exhaust gas temperature the predetermined third set temperature (T _set3) or more (S130), the third predetermined temperature (T _set3) is the 1 set temperature T _set1 , it is more preferable to set the temperature to be lower than the first set temperature T _set1 in consideration of the cooling efficiency.

If it is determined in step S130 that the indoor air exhaust temperature is lower than the third set temperature T _set3 , the control unit 100 maintains the cooling by the auxiliary cooling unit currently being cooled and repeats step S120, If the exhaust temperature is equal to or higher than the third set temperature T _set3 , the subcooling portion of the auxiliary cooling portion operating in the cooling mode operates in the cooling mode and the remaining subcooling portion operates in the cooling mode in operation S140, S150).

If the indoor air exhaust temperature of the first sub-cooling unit 20 is equal to or higher than the third set temperature T _{set3 as a} result of the determination in step S130, the controller 100 determines whether the indoor air- The second sub cooling unit 30 operates in the cooling mode and controls the first sub cooling unit 20 to be operated in the cooling mode again.

When the step S150 is completed, the controller 100 determines whether an operation termination signal of the auxiliary cooling units 20 and 30 has been inputted (S160). If the operation is terminated, The plurality of auxiliary cooling units 20 and 30 alternately perform the cooling mode and the cooling mode so that the cooling can be continuously performed by the auxiliary cooling unit.

At this time, the controller 100 may be configured to control the rotation speed of the outdoor air blowing fans 27 and 37 faster than the indoor air blowing fans 26 and 36 so that the cooling mode may be completed faster than the cooling mode And the auxiliary cooling unit, which has been cooled during the operation in the cooling mode as described above, may be configured to stop the operation until the cooling mode is operated.

According to the above-described configuration and control method, the air-cooled cooling system system using the outside air according to the present invention is characterized in that, in addition to the main cooling unit for cooling the target space using the cool air generated by the external power, And a plurality of subcooling units including a blower fan, a second damper unit, a second blower fan, and a superheat heat exchanger. Thus, in a target space requiring four-season cooling, such as a computer room or a communication base station, In the winter season where the outdoor air temperature is low, the cooling is performed by using the cooling air of the outdoor air by the auxiliary cooling unit, so that the electric energy consumed for cooling the target space can be remarkably reduced There is an advantage.

In addition, in the cooling system using outside air according to the present invention, when cooling using outdoor air, the first and second damper units and the first and second blowing fans of the auxiliary cooling unit are controlled to shut off the indoor air, And the cooling air stored by the heat exchange between the cooling water heat exchanger and the indoor air is supplied to the indoor space while the outdoor air is shut off. So that it is possible to prevent the risk of damaging facilities such as condensation, thermal shock or contamination due to a temperature difference that may be generated by the outdoor air directly entering the indoor space There are advantages to be able to.

In addition, in the cooling-air cooling system system using the outside air according to the present invention, since the auxiliary cooling section is configured to perform the purge mode in which the room air is sucked and discharged to the outside for a predetermined time before the cooling mode is performed, There is an advantage that it can be prevented more effectively from being directly introduced into the indoor space.

(Second Embodiment)

In the case of the first embodiment, when the indoor unit is operated in the cooling mode, the room air inlet and the air outlet are closed. In the case where the indoor unit is operated in the air-cooling mode, the purge mode is performed before the air- The present invention is different from the first embodiment in that the outdoor air is prevented from flowing directly into the target space 1a by separating the indoor air and the outdoor air flow path from each other inside the auxiliary outdoor unit body of the subcooling portion .

Therefore, the second embodiment of the present invention is different from the first embodiment only in the constitution of the cold-storage heat exchanger and the sub-cooling section, so that the same constituent elements are given the same reference numerals, A description thereof will be omitted.

FIG. 4 is a view for explaining a configuration of an auxiliary cooling unit of the air cooling system using outside air according to a second embodiment of the present invention, and FIG. 5 is a sectional view taken along the line A-A of FIG.

6A and 6B are views for explaining the constitution of the unit heat exchange plate constituting the superheated heat exchanger and the superheated heat exchanger shown in FIG. 4, and FIG. 7 is a view for explaining the structure of the outdoor air intake guide shown in FIG. Fig.

In this embodiment, since the first sub cooling section 20 and the second sub cooling section 30 have the same configuration, only the configuration of the first sub cooling section 20 will be described below for convenience of explanation .

The heat storage heat exchanger 28 according to the present embodiment is formed by laminating a plurality of plate-shaped unit heat exchange plates 281 in which a hollow is formed at the center and filled with a coolant therein, And an air passage 28a is formed.

For this, the unit heat exchange plate 281 is formed in a plate shape, and a hollow portion 281c for forming a part of the air flow path 28a is formed at the center portion. In the rim portion of the hollow portion 281c, The protruding portion 281b is formed so as to protrude in the front-rear direction of the plate.

The unit heat exchange plate 281 has a flange 281a extending from the outer edge of the protrusion 281b and a plurality of coupling holes 281d formed in the coupling flange 281a.

At this time, the engagement flange 281a functions to seal the axial coolant filled in the protrusion 281b.

A plurality of the unit heat exchange plates 281 are coupled to each other by using a coupling member 282 such as a bolt / nut through the coupling holes 281d. In this case, the hollows 281c So that the protrusions 281b of the adjacent unit heat exchange plates 281 are in surface contact with each other.

The air passage 28a formed at the center of the superheated refrigerant heat exchanger 28 forms a flow passage through which the outdoor air flows as described later, So that heat exchange is performed.

At this time, since each of the engagement flanges 281a is spaced apart from each other by the projecting height of the protruding portion 281b (specifically, twice the protruding height), the heat transfer area Function.

The first sub cooling unit 20 includes a first tubular first cooling air passage 24a connecting one end of the air passage 28a to the first outdoor air intake port 24a in the first auxiliary outdoor unit body 21, An outdoor air intake guide 29a and a tubular first outdoor air exhaust guide 29b for connecting the other end of the air passage 28a to the first outdoor air exhaust port 24b.

In this case, the first outdoor air blowing fan 27 is installed in the middle of the first outdoor air intake guide 29a or the first outdoor air exhaust guide 29b.

In the case of the auxiliary cooling units 20 and 30 of the cooling system using the outside air according to the present embodiment, outdoor air is guided through the outdoor air intake guide 29a, the air passage 28a, The indoor air flows along the outer side of the outdoor air passage and the outdoor air passage and the indoor air passage are separated from each other inside the auxiliary cooling section Therefore, there is an advantage that outdoor air can be prevented from being directly introduced into the indoor space more effectively.

The end portions of the first outdoor air intake guide 29a and the first outdoor air exhaust guide 29b connected to both ends of the air passage 28a are formed in the cross section of the air passage 28a, And the first outdoor heat exchanger 28 and the first outdoor air intake / exhaust guides 29a and 29b are connected to each other through the first cooling water heat exchanger 28 and the first outdoor air intake / Can be easily combined without using a separate joining member.

In this embodiment, for example, the first outdoor air intake guide 29a includes a first tubular member 291a having one end connected to the first outdoor air intake port 24a, and a second tubular member 291b connected to the first tubular member 291a And a second tubular member 292a coupled to the other end.

The first tubular member 291a and the second tubular member 292a are coupled to each other by flanges 293a and 294a and are connected to one end of the air flow path 28a of the first supercooled heat exchanger 28 The tubular coupling protrusion 295a is protruded from the distal end of the second tubular member 292a.

If necessary, the second tubular member 292a may be formed in the form of a corrugated tube capable of expanding and contracting in length so as to adjust the joining position in order to facilitate coupling with the first coaxial heat exchanger 28, It goes without saying that the structure of the first outdoor air intake guide 29a may be applied to the first outdoor air exhaust guide 29b.

1a: target space 10: main cooling unit
20: first sub cooling section 22a: first indoor air vent
22b: first indoor air intake port 23a: first indoor air exhaust damper
23b: first indoor air intake damper 24a: first outdoor air intake port
24b: first outdoor air exhaust port 25a: first outdoor air intake damper
25b: first outdoor air exhaust damper 26: first indoor air ventilation fan
27: first outdoor air blowing fan 28: first annular cooling heat exchanger
30: first sub cooling section 32a: second indoor air exhaust port
32b: second indoor air intake port 33a: second indoor air exhaust damper
33b: second indoor air intake damper 34a: second outdoor air intake port
34b: second outdoor air exhaust port 35a: second outdoor air intake damper
35b: second outdoor air venting damper 36: second indoor air ventilation fan
37: second outdoor air blowing fan 38: secondarily-cooled heat exchanger

Claims (8)

A main cooling unit for cooling the interior of the object space requiring cooling by external power;
A temperature sensor unit including an indoor temperature sensor for measuring an indoor temperature inside the object space and an outdoor temperature sensor for measuring an outdoor temperature outside the object space;
A plurality of auxiliary cooling units installed outside the target space to perform a cooling mode for storing cool air of outdoor air or a cooling mode for supplying the stored cool air to the interior of the target space; And
Wherein the auxiliary cooling section is operated in either the cooling or the cooling mode to operate the main cooling section when the indoor temperature is equal to or higher than the preset first set temperature and to reduce the cooling load of the main cooling section when the outdoor temperature is lower than the first set temperature And a control unit for controlling operation in one operation mode,
Wherein the auxiliary cooling unit includes a first air inlet and a first air outlet formed at one side of the target space and communicating with the inside of the target space and a second air inlet communicating with the outside of the target space at the other side, A damper module that opens and closes the first exhaust port, the first exhaust port, the second exhaust port, and the second exhaust port; and a damper module installed inside the auxiliary outdoor unit main body An indoor air blowing fan for discharging indoor air sucked through the first suction port to a first exhaust port and an outdoor air blowing fan for discharging outdoor air sucked through the second suction port to the second exhaust port, And a blowing fan,
The temperature sensor unit further includes an outdoor air exhaust temperature sensor for measuring an outdoor air exhaust temperature, which is a temperature of outdoor air introduced through the second intake port and heat-exchanged with the hot-water storage heat exchanger, and then discharged to the outside of the object space through the second exhaust port ≪ / RTI &
The control unit operates in a cooling mode in which the outdoor air blowing fan is operated in a state in which the subcooling unit closes the first suction port and the first exhaust port and opens the second suction port and the second exhaust port when the outdoor temperature is lower than the first set temperature If there is an auxiliary cooling section in which the cooling is completed, it is determined whether or not there is an auxiliary cooling section that has been cooled by using the outdoor air exhaust temperature. If the cooling section is completed, the auxiliary cooling section opens the first intake port and the first exhaust port, And the second cooling unit is operated in the cooling mode in which the indoor air blowing fan is operated while the second air outlet is closed, and the remaining auxiliary cooling unit is operated in the cooling mode. delete delete The method according to claim 1,
The temperature sensor unit may include an indoor air exhaust temperature sensor for measuring an indoor air exhaust temperature, which is a temperature of indoor air introduced through the first intake port, exchanged with the hot-water storage heat exchanger, and then discharged into the target space through the first exhaust port Further included,
Wherein the controller controls the auxiliary cooling unit to be operated in the cooling mode and the remaining auxiliary cooling units to operate in the cooling mode when the indoor air exhaust temperature is equal to or higher than a preset second set temperature, Wherein the air-cooling system comprises an outdoor unit. The method according to claim 1 or 4,
Wherein the control unit controls the outdoor air blowing fan in a state where at least one of the first air inlet and the first air outlet and the second air outlet are open for a predetermined time before the air conditioner is operated in the cooling mode, Wherein the control unit controls the air conditioner to operate in a purge mode in which the outdoor air inside the auxiliary outdoor unit is discharged to the outside. 6. The method of claim 5,
The controller controls the rotation speed of the outdoor air blowing fan faster than the indoor air blowing fan so that the cooling mode can be completed faster than the cooling mode, and the auxiliary cooling unit, which has been cooled during the operation in the cooling mode, operates in the cooling mode Wherein the operation of the air cooling system is stopped when the temperature of the outdoor air reaches a predetermined temperature. The method according to claim 1 or 4,
The above-mentioned hot-water heat exchanger is formed by laminating a plurality of plate-shaped unit heat exchange plates formed with hollows at the center and filled with a cooling material therein, and a tubular air flow path is formed at the center thereof by the hollows.
The auxiliary cooling unit may further include a tubular outdoor air intake guide for connecting the second intake port and one end of the air flow path and a tubular outdoor air exhaust guide for connecting the other end of the air flow path to the second exhaust port Wherein the air-cooling system comprises an outdoor unit. 8. The method of claim 7,
Wherein the outer air intake guide and the outdoor air exhaust guide connected to the air flow path are each formed with a tubular coupling protrusion having a sectional shape of the air flow path and fitted to the inner surface of the air flow path, Device system.

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