KR102021653B1 - Cooling and heating system for boarding bridge - Google Patents

Abstract

The air-conditioning system of a boarding bridge includes an outdoor unit and an indoor unit for cooling and heating a boarding bridge that interacts with an aircraft. A four-way valve, an indoor heat exchanger in communication with the four-way valve, an outdoor heat exchanger in communication with the indoor heat exchanger, and a first heat exchanger disposed between the indoor heat exchanger and the outdoor heat exchanger, wherein the first heat exchanger includes: The condensed refrigerant may be secondary condensed.

Description

Cooling and heating system for boarding bridge

The present invention relates to a cooling and heating system of a boarding bridge, and more particularly to a cooling and heating system of a boarding bridge capable of continuous heating and cooling, less affected by the external environment.

The boarding bridge is a mechanical bridge for transporting passengers between the aircraft and the terminal at the airport terminal.The boarding bridge is installed as a fixed tunnel from the terminal to the rotunda, and the mobile tunnel is installed from the rotunda to the aircraft to use the wheel of the mobile tunnel. Turn and move so that the boarding bridge is adjacent to the aircraft.

In the terminal and aircraft of the airport, proper air-conditioning is in operation. Boarding bridges are often made of glass, and air flows into the gap between the rotunda area, the Kevin floor, and the internal and external tunnels of the mobile boarding bridge. Hotter or colder than the right temperature, passenger complaints are occurring. In order to solve these inconveniences, various air-conditioning devices are installed in the boarding bridge.

In general, a heat pump type air conditioner is mainly used as an air conditioner installed in a boarding bridge. Heat pump type air-conditioning unit is installed directly on the boarding bridge and connected to boarding bridge for cooling and heating.

When the heat pump type air conditioner is heated in winter, the heat exchanger of the outdoor unit serves as an evaporator, and frost occurs due to frost on the surface of the evaporator. When such freezing occurs, heat transfer of the heat pump type air conditioner is reduced, heat transfer efficiency is lowered, and the refrigerant temperature of the evaporator is lowered to promote the occurrence of freezing. In order to remove such icing, the conventional heat pump type air conditioner stops heating operation and performs cooling operation so that the heat exchanger located in the outdoor unit serves as a condenser, thereby defrosting the surface of the evaporator.

In addition, when snow occurs outside the outdoor unit, the temperature of the outdoor unit may be lowered to promote freezing of the evaporator. In this case, the worker's safety cannot be guaranteed because the worker must climb on the upper part of the boarding bridge for snow removal.

In addition, when the heat pump type air conditioner is cooled in summer, when the temperature inside the tunnel increases during initial operation, the temperature of the refrigerant sucked into the compressor may increase, causing the compressor to overheat and be damaged. There are often problems that arise.

In this regard, the prior art discloses the Republic of Korea Patent No. 10-1347137 "tunnel heating and cooling device, a boarding bridge, a boarding bridge air-conditioning system, its control system" (2013.12.26).

In order to solve the problems of the prior art, it is possible to defrost the frost generated in the evaporator during the heating operation to provide a heating and cooling device of the boarding bridge capable of seamless heating operation.

Another object of the present invention is to provide a cooling and heating device for a boarding bridge capable of removing and defrosting the surface of an outdoor unit and an indoor unit.

In addition, to provide a cooling and heating device of the boarding bridge that can prevent overheating and damage of the compressor during the cooling operation.

In addition, it is to provide a heating and cooling device of the boarding bridge that can increase the efficiency of the heating and cooling operation.

It will be described the air-conditioning device of the boarding bridge according to the present invention. The air-conditioning device of a boarding bridge including an outdoor unit and an indoor unit for cooling and heating a boarding bridge which interacts with an aircraft includes a compressor in which a refrigerant is compressed at high temperature and high pressure, a four-way valve for switching the direction in which the refrigerant is circulated during the cooling operation or the heating operation, An indoor heat exchanger in communication with a four-way valve, an outdoor heat exchanger in communication with the indoor heat exchanger, and a first heat exchanger disposed between the indoor heat exchanger and the outdoor heat exchanger, wherein the first heat exchanger is The refrigerant condensed in the outdoor heat exchanger may be second condensed.

According to one side, it may further include an auxiliary blowing fan disposed on the first heat exchanger.

According to one side, the auxiliary blowing fan, during the heating operation, it is possible to blow the heated air generated by condensing the refrigerant of the high temperature flowing from the indoor heat exchanger to the inside of the outdoor unit or the outdoor heat exchanger. have.

According to one side, the first heat exchanger may be blocked a portion of the inlet for intake air.

According to one side, it may further include a second heat exchanger for mutual heat exchange between the refrigerant flowing into the outdoor heat exchanger and the discharged refrigerant.

According to one side, the second heat exchanger may be a plate heat exchanger.

According to one side, it may further include a heat generating member coupled to the outdoor unit or the outside of the indoor unit.

According to one side, the heat generating member may defrost or remove the outer surface of the outdoor unit or the indoor unit.

According to one side, it is connected between the four-way valve and the compressor, a liquid separator for supplying a mixture of oil and refrigerant to the compressor at a predetermined ratio, a receiver for storing the refrigerant, coupled between the liquid separator and the compressor The apparatus may further include a temperature sensor, a cooling pipe communicating with the refrigerant between the receiver and the compressor, and an injection valve for opening and closing the cooling pipe.

According to one side, the injection valve, in the cooling operation, when the refrigerant measured by the temperature sensor is a predetermined temperature or more, may be opened to cool the compressor.

According to one side, during the cooling operation, by cooling the coolant to the cold water generated by the refrigerant evaporated in the indoor heat exchanger may further include a cooler for cooling the outdoor heat exchanger.

According to one side, the cooler, a cooling water tank for storing the cooling water, a cooling water coil in communication with the cooling water tank disposed on the indoor heat exchanger, a cooling member disposed on the outdoor heat exchanger and the outdoor heat exchanger and the cooling water The tank may further include a cooling water pipe communicating with the tank.

According to one side, the cooling member may be a bacteria resistant material.

According to one side, the cooling member may be in the form of a coil.

According to one side, the cooling member may be in the form of a nonwoven fabric.

According to the present invention, it is possible to defrost the frost generated in the evaporator during the heating operation can be heated without interruption.

In addition, the surfaces of the outdoor unit and the indoor unit can be removed and defrosted.

In addition, during the cooling operation, overheating and damage of the compressor can be prevented.

In addition, the efficiency of the heating and cooling operation can be improved.

1 is a side view showing the air-conditioning device of the boarding bridge and the boarding bridge according to the embodiment.
Figure 2 is a schematic diagram schematically showing the configuration of the heating and cooling device of the boarding bridge according to the embodiment.
3 is a perspective view illustrating a first heat exchanger intake port according to the embodiment.
Figure 4 is a schematic diagram schematically showing the state of snow removal and defrosting of the air-conditioning device of the boarding bridge during the heating operation according to the embodiment.
5 is a perspective view showing the exterior of the outdoor unit and the indoor unit of the air-conditioning device of the boarding bridge according to the embodiment.
6 is a schematic diagram schematically showing a state of a cooling and heating device of a boarding bridge during the cooling operation according to the embodiment.
7 is a schematic diagram schematically showing the appearance of the cooler during the cooling operation of the air conditioning apparatus of the boarding bridge according to the embodiment.

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

1 is a side view showing the air-conditioning device of the boarding bridge and the boarding bridge according to the embodiment.

As shown in FIG. 1, the boarding bridge 10 may include a tunnel 11, a rotunda 12, a lift column 13, a wheel driver 14, a cabin floor 15, and a canopy 16. have.

The tunnel 11 may form a passage through which passengers can move. The tunnel 11 shown in this embodiment may be a telescopic tunnel whose length and the like can be changed. One end of the tunnel 11 may be supported by the rotunda 12. Although not shown in the present invention, the tunnel 11 may further include a fixed tunnel connecting the terminal and the rotunda 12.

Rotunda 12 may be a column for supporting the fixed tunnel and the expansion tunnel. Rotunda 12 is capable of adjusting the height can be constantly adjusted to the inclination of the fixed tunnel and the expansion tunnel caused by the height of the aircraft 20.

The lift column 13 may be coupled to the tunnel 11 to adjust the height by raising and lowering the tunnel 11. The lift column 13 may adjust the height of the tunnel 11 so that the cabin floor 15 may be located at the door of the aircraft 20 having various sizes and heights according to the model.

The wheel driver 14 may be disposed at the bottom of the lift column 13. The wheel driver 14 may change the position of the tunnel 11 by driving a wheel in close contact with the ground surface so that the direction of the tunnel 11 may be changed or the length of the tunnel 11 may be changed.

Cabin floor 15 is coupled to the other end of the tunnel 11 may be connected between the tunnel 11 and the aircraft 20. The cabin floor 15 may be rotatable. Therefore, the cabin floor 15 can rotate and make parallel contact with the aircraft 20.

Canopy 16 may be coupled to cabin floor 15. The canopy 16 seals between the cabin floor 15 and the aircraft 20 so that the passage may not be affected by outside air. The canopy 16 may be corrugated and may itself absorb shocks.

The boarding bridge 10 may be a passage that connects the aircraft 20 cycled to the terminal and the mooring hall of the airport, and moves without receiving the outside air to the passengers boarding and following. Therefore, it is preferable that the air-conditioning and cooling device 30 is coupled to the boarding bridge 10 to supply air cooled and heated to the passengers using the boarding bridge 10 to provide the convenience of the passengers.

The air conditioning and heating device 30 of the boarding bridge may be arranged to be connected to the outdoor unit 310 and the indoor unit 330 on the upper portion of the boarding bridge (10). The cooling and heating device 30 of the boarding bridge has a good space efficiency, and can connect the indoor unit 330 and the boarding bridge 10 to supply air cooled and heated to the inside of the boarding bridge 10.

The configuration of the heating operation of the air-conditioning device 30 of the boarding bridge will be described with reference to FIGS. 2 to 5, and the configuration of the cooling operation will be described later with reference to FIGS. 6 to 7.

Figure 2 is a schematic diagram schematically showing the configuration of the heating and cooling device of the boarding bridge according to the embodiment.

As shown in FIG. 2, the air conditioning and heating device 30 of the boarding bridge may include an outdoor unit 310 and an indoor unit 330.

The outdoor unit 310 may include a compressor 311, an oil separator 311a, a four-way valve 312, a filter drier 313, a first heat exchanger 314, a receiver 315, a second heat exchanger 316, Second expansion valve 317a (hereinafter also referred to as outdoor heat exchanger side expansion valve), Second check valve 317b (hereinafter also referred to as outdoor heat exchanger side check valve), outdoor heat exchanger 318, LPS (Low Pressure Switch) ), 319, a liquid separator 311b, a temperature sensor 311c, and a measurement pipe 320.

The indoor unit 330 may include an indoor heat exchanger 331, a first expansion valve 332a, and a second check valve 332b. In addition, the indoor unit 330 may further include an indoor fan 331a for sucking air in the tunnel 11 and supplying the air conditioned back into the tunnel 11.

Such, the heating and cooling device 30 of the boarding bridge is composed of a pipe in which the refrigerant flows inside the outdoor unit 310 and the indoor unit 330 can be operated as a system.

The compressor 311 may compress the refrigerant in the form of gas to the condensation pressure in a state of high temperature and high pressure. The refrigerant compressed by the compressor 311 may have a temperature of 80 ° C ~ 90 ° C.

The oil separator 311a may separate oil contained in the refrigerant discharged from the compressor 311. The oil separator 311a may return the separated oil back to the compressor 311.

The four-way valve 312 may switch the circulation direction of the high temperature and high pressure refrigerant from which the oil is removed from the oil separator 311a during the cooling operation or the heating operation. For example, the four-way valve 312 may introduce the refrigerant into the indoor heat exchanger 331 during the heating operation and the outdoor heat exchanger 318 during the cooling operation.

The indoor heat exchanger 331 is in communication with the four-way valve 312, the refrigerant of the high temperature and high pressure may be introduced. The indoor heat exchanger 331 may condense a refrigerant having a high temperature and high pressure to heat air sucked by the indoor fan 331a in the tunnel 11. The indoor fan 331a may supply the heated air to the tunnel 11 again to heat the inside of the tunnel 11.

The refrigerant condensed and discharged in the indoor heat exchanger 331 may flow into the first heat exchanger 314. The indoor heat exchanger 331 heats the inside of the tunnel, and the temperature of the discharged refrigerant may maintain waste heat at 45 ° C to 50 ° C.

The first expansion valve 332a may be disposed between the indoor heat exchanger 331 and the first heat exchanger 314. The first expansion valve 332a may be a valve for reducing the condensed refrigerant to a pressure capable of evaporating by the throttling action. In addition, the first expansion valve 332a may adjust and supply an appropriate amount of refrigerant capable of absorbing sufficient heat from the evaporator.

Accordingly, the first check valve 332b may be arranged to bypass the first expansion valve 332a so that the heating operation of the air conditioning apparatus 30 of the boarding bridge may be possible. The first check valve 332b may be a valve to allow the fluid to flow in only one direction and not in the opposite direction. The first check valve 332b may be disposed to flow only in the direction of the first heat exchanger 314 from the indoor heat exchanger 331.

During the heating operation of the air conditioning unit 30 of the boarding bridge, the refrigerant discharged from the indoor heat exchanger 331 may be diverted to the first check valve 332b. The refrigerant bypassed to the first check valve 332b may flow into the first heat exchanger 314 disposed between the indoor heat exchanger 331 and the outdoor heat exchanger 318. The refrigerant may be introduced through the filter drier 313 that absorbs the moisture of the refrigerant before entering the first heat exchanger 314.

The first heat exchanger 314 may supply the air heated in the tunnel from the indoor heat exchanger 331 to secondary condensate of the refrigerant having the waste heat remaining. The first heat exchanger 314 may secondary heat the air introduced from the outside.

The auxiliary blower fan 314a may be disposed on one surface of the first heat exchanger 314. The auxiliary blowing fan 314a may suck external air and blow air heated from the first heat exchanger 314 into the outdoor unit 310.

3 is a perspective view illustrating an intake port of a first heat exchanger according to an embodiment.

As shown in FIG. 3, the first heat exchanger 314 may include a first heat exchange coil 314b, a first housing 314c, and an inlet 314d.

The refrigerant introduced from the indoor heat exchanger may circulate inside the first heat exchange coil 314b. The first heat exchange coil 314b may be a copper material having high thermal conductivity.

The first housing 314c may have a rectangular shape with an empty inside. The first heat exchange coil 314b may be disposed in the first housing 314c. An inlet 314d may be formed on one surface of the first housing 314c to allow air outside the first heat exchange coil 314b to flow into the first heat exchanger 314. An auxiliary blower 314a may be disposed on the other surface of the first housing 314c to blow air into the outdoor unit 310.

The inlet port 314d may have a shape in which part of the inlet port 314d is blocked. The inlet 314d may increase the suction speed of the external air to increase the condensation efficiency of the refrigerant.

Referring back to FIG. 2, the second condensed refrigerant in the first heat exchanger 314 may be 35 ° C. to 45 ° C. FIG. The secondary condensed refrigerant may flow into the receiver 315.

The receiver 315 may be a container for temporarily storing the high temperature and high pressure refrigerant liquefied in the condenser. The receiver 315 is preferably filled with the refrigerant to 75% or less of the internal volume. The receiver 315 may recover and store the refrigerant when the air conditioner 30 of the boarding bridge is stopped or repaired. The refrigerant discharged from the receiver 315 may pass through the second heat exchanger 316.

The second heat exchanger 316 may exchange heat between the refrigerant flowing into the outdoor heat exchanger 318 and the refrigerant discharged. The second heat exchanger 316 may be a plate heat exchanger. The second heat exchanger 316 condenses the liquid refrigerant through the compressor, the indoor heat exchanger, and the first heat exchanger for heating, before passing through the second expansion valve 317a of the outdoor heat exchanger. After passing through the second expansion valve 317a and the outdoor heat exchanger, the refrigerant evaporated passes. Of the pipes circulating the second heat exchanger, the pipes through which the refrigerant is introduced into the outdoor heat exchanger 318 and the pipes discharged in the opposite directions pass through each other, so that only the heat can be exchanged without mixing the fluids.

Therefore, the liquid refrigerant supplied from the second heat exchanger 316 to the outdoor heat exchanger 318 is further condensed to lower the temperature, and is discharged from the outdoor heat exchanger 318 to the second heat exchanger 316. Gas refrigerants can not only evaporate further but also rise in temperature.

The second heat exchanger 316 improves the freezing efficiency by secondary evaporation of the refrigerant having less evaporation in the outdoor heat exchanger 318 and superheating the low-temperature low-temperature gas refrigerant in the outdoor heat exchanger 318. Accordingly, the second heat exchanger 316 may prevent the refrigerant from flowing into the liquid state, thereby preventing damage to the compressor 311. The refrigerant flowing into the second expansion valve 317a from the second heat exchanger 316 may be 25 ° C to 35 ° C.

The second expansion valve 317a may be disposed between the refrigerant flowing into the outdoor heat exchanger 318 from the second heat exchanger 316. Like the first expansion valve 332a, the second expansion valve 317a is a valve that reduces the pressure to the pressure that can evaporate the condensed refrigerant by the throttling action. In addition, the second expansion valve 317a regulates and supplies an appropriate amount of refrigerant capable of absorbing sufficient heat in the evaporator.

Like the first check valve 332b, the second check valve 317b may be arranged to bypass the second expansion valve 317a. However, the second check valve 317b may be arranged to allow the refrigerant to flow from the outdoor heat exchanger 318 toward the receiver 315. Accordingly, the second check valve 317b may be arranged to bypass the second expansion valve 317a to allow the refrigerant to flow during the cooling operation.

Therefore, the refrigerant flowing into the outdoor heat exchanger 318 from the second heat exchanger 316 may be reduced in pressure by a throttling action to the refrigerant having a low pressure through the second expansion valve 317a. The temperature of the refrigerant decompressed through the second expansion valve 317a may be 0 ° C to 5 ° C.

The outdoor heat exchanger 318 may be connected to the indoor heat exchanger to evaporate the reduced pressure refrigerant. The outdoor heat exchanger 318 may suck air in the outdoor unit 310 to discharge the air lowered as the refrigerant evaporates to the outside through the external fan 318a. The refrigerant discharged from the outdoor heat exchanger 310 may be 0 ° C to 10 ° C.

The hot gas pipe 319a may directly communicate the refrigerant discharged from the compressor 311 to the outdoor heat exchanger 318. The hot gas pipe may connect a pipe through which the refrigerant is discharged from the compressor 311 and a pipe through which the refrigerant is discharged from the second expansion valve 317a.

The hot gas valve 319b may be connected to the hot gas pipe 319a. The hot gas valve 319b may selectively open and close the hot gas pipe 319a to supply the refrigerant discharged from the compressor 311 to the outdoor heat exchanger 318.

The low pressure switch (LPS) 319 may be coupled between the second expansion valve 317a and the outdoor heat exchanger 318. The low pressure switch (LPS) 319 may act as a contact when the pressure drops below the set predetermined pressure. A low pressure switch (LPS) 319 having a contact function may open a hot gas valve 319b to supply a high temperature and high pressure refrigerant to the outdoor heat exchanger 318 to generate a pressurizing action. The low pressure switch (LPS) 319 may defrost the outdoor heat exchanger 318 and increase the evaporation pressure. When the LPS 319 is above a predetermined pressure, the LPS 319 may be opened to close the hot gas valve 319b to stop the pressurizing operation and maintain the predetermined pressure.

The refrigerant evaporated in the second heat exchanger 316 may be 5 ° C to 15 ° C. The evaporated refrigerant may again flow into the four-way valve 312. The refrigerant discharged from the four-way valve 312 may be supplied to the liquid separator 311b.

The liquid separator 311b may be coupled between the four-way valve 312 and the compressor 311. The liquid separator 311b may discharge the refrigerant introduced from the four-way valve 312 by mixing a mixture of oil and refrigerant having a predetermined ratio. The refrigerant discharged in this way may flow into the compressor 311. This process may be repeated to construct a heating cycle.

The temperature sensor 311c may be disposed between the liquid separator 311b and the compressor 311. The temperature sensor 311c may be a temperature thermostat regulator. In addition, the temperature sensor 311c may include a digital display and display the temperature.

The measurement pipe 320 may connect between a pipe through which the refrigerant discharged from the compressor 311 circulates and a pipe through which the liquid separator 311b is connected to the compressor 311. LPG (Low Pressure Gage) 321, DPS (Dual Pressure Switch) 322, Fan Pressure Switch (FPS) 323, Fan Pressure Switch (FPS) 324 and HPG high pressure gages 325, and the like. The description of the pressure sensors is already known and thus will be omitted.

The cooling and heating device 30 of the boarding bridge may further include a cooling pipe 311d through which the refrigerant communicates with the receiver 315 and the compressor 311 and an injection valve 311e for opening and closing the cooling pipe 311d.

The cooling pipe 311d and the injection valve 311e will be described later with reference to FIG. 6.

4 is a schematic diagram schematically showing the state of snow removal and defrosting during the heating operation of the air-conditioning device of the boarding bridge according to the embodiment.

As shown in FIG. 4, the air-conditioning device 30 of the boarding bridge may reach a predetermined pressure within about 5 minutes after the operation. The heating and cooling device 30 of the boarding bridge may operate the auxiliary blowing fan 314a disposed on the first heat exchanger 314 when the predetermined pressure set in the first FPS 323 is exceeded.

The auxiliary blower fan 314a may suck outside air to blow air heated by the first heat exchanger 314 into the outdoor unit. The auxiliary blowing fan 314a preferably blows air above the inside of the outdoor unit 310. Therefore, when snow is generated outside the outdoor unit 310, snow removal may be performed without additional snow removal work.

In addition, when the outdoor temperature enters the sub-zero region, frost may occur in the outdoor heat exchanger 318.

In the air-conditioning unit 310 of the boarding bridge, the heated air blown from the auxiliary blower fan 314a to the upper side of the outdoor unit 310 may flow into the outdoor heat exchanger 318 and be discharged to the outside. Since the air conditioning unit 310 of the boarding bridge flows the heated air into the outdoor heat exchanger 318, the frost generated in the outdoor heat exchanger 318 may be defrosted to maintain the pressure inside the pipeline. In addition, by supplying heated air to the outside of the outdoor heat exchanger 318, it is possible to increase the evaporation efficiency. Such, the heating and cooling device 30 of the boarding bridge does not need to drive additional defrosting, defrosting and snow removal is possible to perform a continuous heating operation.

5 is a perspective view showing the exterior of the outdoor unit and the indoor unit of the air-conditioning device of the boarding bridge according to the embodiment.

As shown in FIG. 5, the air conditioning and heating device 30 of the boarding bridge may include an outdoor unit 310, an indoor unit 330, and a heat generating member 340.

The outdoor unit 310 and the indoor unit 330 may be connected and arranged integrally. In addition, the outdoor unit 310 and the indoor unit 330 may be coupled to an upper surface of the boarding bridge 10.

The heating member 340 may be coupled to the upper surfaces of the outdoor unit 310 and the indoor unit 330. The heating member 340 may be a heat coil, a heating jacket, a silicon heater, or the like. The heating member 340 may be driven when snow or freezing occurs in the outdoor unit 310 and the indoor unit 330 to snow or defrost the outdoor unit 310 and the indoor unit 330. The heat generating member 340 is preferably used to heat the heating and cooling device 30 of the boarding bridge using a silicon heater. Therefore, the heating member 340 maintains the temperature of the air-conditioning device 30 of the boarding bridge even when the outside temperature drops to the subzero region, thereby improving the cooling and heating efficiency.

The air-conditioning device 30 of the boarding bridge may further include a snow detection sensor 341.

The snow detection sensor 341 may be disposed on upper surfaces of the outdoor unit 310 and the indoor unit 320. At least one snow detection sensor 341 may be disposed. The snow detection sensor 341 may be disposed at the corners of the upper surface of the outdoor unit 310 and the indoor unit 320. The snow detection sensor 341 may detect snow generated on the outer surfaces of the outdoor unit 310 and the indoor unit 330.

Accordingly, the heating member 340 may be automatically driven when snow is detected by the snow detection sensor to perform snow removal. However, the present invention is not limited thereto, and if snowfall is identified to the naked eyes of the outdoor unit 310 and the indoor unit 330, the operator may manually drive the heating member 340.

6 is a schematic diagram schematically illustrating a state of the air conditioner during the cooling operation of the boarding bridge according to the embodiment.

As shown in Figure 6, during the cooling operation of the air conditioning unit 30 of the boarding bridge, the compressor 311 may discharge the refrigerant in the form of a gas of high temperature and high pressure of the condensation pressure. The high temperature and high pressure refrigerant may be introduced into the second heat exchanger 316 after the oil is removed from the oil separator 311a and the direction of the refrigerant is changed from the four-way valve 312. The redirected refrigerant may pass through the second heat exchanger 316 and flow into the outdoor heat exchanger 318.

The outdoor heat exchanger 318 may condense the high temperature and high pressure refrigerant and discharge the refrigerant to the low temperature and low pressure refrigerant. The low temperature low pressure refrigerant bypasses the expansion valve 317a and flows back into the second heat exchanger 316 through the second check valve 317b.

The second heat exchanger 316 may exchange heat with the high temperature and high pressure refrigerant discharged from the compressor 311 with the low temperature and low pressure refrigerant discharged from the outdoor heat exchanger 318. Therefore, the second heat exchanger 316 may reduce the temperature of the high temperature and high pressure refrigerant discharged from the compressor 311, thereby increasing the condensation efficiency of the outdoor heat exchanger 318.

The receiver 315 may temporarily store the refrigerant passing through the second heat exchanger 316. The receiver 315 preferably fills the refrigerant below 75% of the internal volume. The refrigerant discharged from the receiver 315 may flow into the first heat exchanger 314.

The first heat exchanger 314 may secondary condensate of the refrigerant condensed in the outdoor heat exchanger 318. The refrigerant condensed in this way may pass through the filter drier 313, expand in the first expansion valve 332a, and flow into the indoor heat exchanger 331.

The indoor heat exchanger 331 may evaporate the expanded refrigerant. The indoor heat exchanger 331 may cool the air sucked in the tunnel 11 through the indoor fan 331a and supply it to the room again. The refrigerant may be second condensed in the first heat exchanger 314 to increase the efficiency of complete evaporation in the indoor heat exchanger 331.

The refrigerant evaporated from the indoor heat exchanger 331 flows into the compressor 311 through the liquid separator 311b through the four-way valve 312, and this process is repeated to allow the air conditioning unit 30 of the boarding bridge to perform cooling operation. have.

The air-conditioning device 30 of the boarding bridge may further include a cooling pipe 311d and an injection valve 311e.

In the cooling pipe 311d, a refrigerant may communicate between the receiver 315 and the compressor 311. The cooling pipe 311d may be connected to one end of the pipe between the liquid separator 311b and the compressor 311. The other end of the cooling pipe 311c may be connected to the receiver 315.

The injection valve 311e may be disposed in the cooling pipe 311d. The injection valve 311e may open and close the cooling pipe 311d through which the refrigerant communicates.

The air-conditioning device 30 of the boarding bridge may be cooled in a state where the internal temperature of the tunnel is increased at the initial stage of the cooling operation. In this case, as the refrigerant evaporates in the indoor heat exchanger 331, a phenomenon in which the gas temperature sucked into the compressor 311 may be increased.

The air-conditioning device 30 of the boarding bridge measures the gas temperature flowing into the compressor 311 from the temperature sensor 311c, and when it is increased above a predetermined temperature, the injection valve 311e may be opened. The low temperature refrigerant stored in the receiver 315 may communicate with the cooling pipe 311d and flow into the compressor 311. Accordingly, the compressor 311 may be cooled to prevent the compressor 311 from being overheated or broken.

The air conditioning unit 30 of the boarding bridge may selectively drive the external fan 318a by setting the first FPS 323 to a predetermined pressure. In addition, the cooling and heating device 30 of the boarding bridge can set the second FPS 324 to a predetermined pressure somewhat higher than the pressure set in the first FPS 323 to selectively drive the auxiliary blower fan 314a to stabilize the cooling cycle. have.

7 is a schematic diagram schematically showing the appearance of the cooler during the cooling operation of the air conditioning apparatus of the boarding bridge according to the embodiment.

As shown in FIG. 7, the air conditioner 30 of the boarding bridge may further include a cooler 350 that cools the outdoor heat exchanger 318 by sharing cold air generated by evaporation of the refrigerant in the indoor heat exchanger 331. Can be.

The cooler 350 may further include a coolant tank 351, a coolant coil 352, a coolant pipe 353, and a cooling member 354.

The coolant tank 351 may store coolant. The coolant tank 351 may receive coolant from one side. The other side of the cooling water tank 351 may discharge the cooling water.

The coolant coil 352 may be arranged to be connected to the indoor heat exchanger 331. The cooling water coil 352 may cool the cooling water by reducing the ambient temperature by evaporation of the refrigerant in the indoor heat exchanger 331. The cooling water tank 351 and the indoor heat exchanger 331 of the cooling water coil 352 may be disposed to circulate.

The cooling water pipe 353 may communicate with the cooling water discharged by being connected to the other side of the cooling water tank 351. One end of the cooling water pipe 353 may be connected to the cooling member 354. Although the coolant pipe and the cooler are illustrated in this embodiment, the valve is not configured, but the present invention is not limited thereto. The coolant pipe 353 may further include various valves such as a check valve, an injection valve, and a globe valve. .

The cooling member 354 may be disposed on the outdoor heat exchanger 318. The cooling member 354 may receive the cooling water through the cooling water pipe 353 to cool the outdoor heat exchanger 318 to increase the condensation efficiency. The cooling member 354 may be a material resistant to mold with a bactericidal material.

The cooling member 354 may be supplied in a structure in which coolant is circulated around the outdoor heat exchanger 318 and cooled. For example, a coil-shaped cooling member 354 may be disposed in the outdoor heat exchanger 318. The cooling member 354 may reduce the ambient temperature of the outdoor heat exchanger while cooling water is circulated, thereby increasing condensation efficiency.

On the other hand, the cooling water pipe 353 may be supplied to the cooling member 354 in a spray form by having a nozzle (not shown) at one end coupled to the cooling member 354 to increase the cooling efficiency. For example, a nonwoven fabric cooling member 354 may be disposed in the outdoor heat exchanger 318. When the cooling water is supplied to the cooling member 354 in a spray form, the cooling water sprayed on the outside of the nonwoven fabric may be reduced while the temperature of the outdoor heat exchanger 318 is reduced, thereby increasing the condensation efficiency of the outdoor heat exchanger 318. .

As described above, the heating and cooling device 30 of the boarding bridge according to the embodiment may defrost the frost generated in the evaporator during the heating operation, thereby enabling the heating operation without interruption.

In addition, the surfaces of the outdoor unit and the indoor unit can be removed and defrosted.

In addition, during the cooling operation, overheating and damage of the compressor can be prevented.

In addition, the efficiency of the heating and cooling operation can be improved.

As described above, the embodiments of the present invention have been described by specific embodiments, such as specific components, and limited embodiments and drawings, but these are provided only to help a more general understanding of the present invention, and the present invention is limited to the above embodiments. Various modifications and variations can be made by those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all of the equivalents and equivalents of the claims, as well as the following claims, will fall within the scope of the present invention. .

10: boarding bridge 11: tunnel
20: Aircraft 30: Air-conditioning system of boarding bridge
310: outdoor unit 311: compressor
312 four-way valve 314 first heat exchanger
315: receiver 316: second heat exchanger
317a: second expansion valve 318: outdoor heat exchanger
311c: Temperature sensor 311d: Cooling pipe
311e: Injection valve 320: Measurement piping
330: indoor unit 331: indoor heat exchanger
332a: first expansion valve 340: heat generating member
341: snow detection sensor

Claims (15)

In the air-conditioning system of a boarding bridge comprising an outdoor unit and an indoor unit for air-conditioning the boarding bridge that interacts with the aircraft,
A compressor in which the refrigerant is compressed at high temperature and high pressure;
Four-way valve for switching the direction in which the refrigerant is circulated during the cooling operation or heating operation;
An indoor heat exchanger in communication with the four-way valve;
An outdoor heat exchanger in communication with the indoor heat exchanger;
An outdoor heat exchanger side expansion valve connected to the outdoor heat exchanger and installed in parallel with the outdoor heat exchanger side check valve to pass only when the liquid refrigerant flows into the outdoor heat exchanger;
A first heat exchanger disposed between the indoor heat exchanger and the outdoor heat exchanger to secondary condensate of the refrigerant condensed in the indoor heat exchanger or the outdoor heat exchanger;
Is disposed on the first heat exchanger, during the heating operation, the heated air generated when condensing the high-temperature refrigerant flowing from the indoor heat exchanger in the first heat exchanger blowing the upper side inside the outdoor unit, An auxiliary blower fan for blowing the heated air into the outdoor heat exchanger;
It is a plate heat exchanger, the refrigerant is passed through the compressor, the indoor heat exchanger, the first heat exchanger for heating so that the condensed liquid refrigerant flowing into the outdoor heat exchanger and the evaporated gas refrigerant discharged to the heat exchanger when heating. Condensed into the liquid refrigerant before entering the outdoor heat exchanger-side expansion valve, and the liquid refrigerant passing through the expansion valve and the outdoor heat exchanger is evaporated from the outdoor heat exchanger and then reintroduced into the gas refrigerant state and A second heat exchanger configured to exchange heat between the gas refrigerants;
A snow detection sensor disposed on an upper surface of the outdoor unit and the outside of the indoor unit and capable of detecting snow accumulated on the outer surfaces of the outdoor unit and the indoor unit; And
A heat generating member coupled to the outside of the outdoor unit or the indoor unit and automatically driven when the snow is detected by the snow detection sensor to remove snow;
Heating and cooling device of the boarding bridge comprising a. delete delete The method of claim 1,
The first heat exchanger,
Heating and cooling system of a boarding bridge where a part of the intake port for intake of outside air is blocked. delete The method of claim 1,
A hot gas pipe communicating the refrigerant discharged from the compressor to the outdoor heat exchanger; And
A hot gas valve for selectively opening and closing the hot gas pipe;
Heating and cooling device of the boarding bridge further comprising. delete The method of claim 1,
The heating member,
Cooling and heating device of the boarding bridge defrosting the outer surface of the outdoor unit or the indoor unit. The method of claim 1,
A liquid separator connected between the four-way valve and the compressor to supply a mixture of oil and refrigerant to the compressor at a predetermined ratio;
A receiver for storing the refrigerant;
A temperature sensor coupled between the liquid separator and the compressor;
A cooling pipe communicating with the refrigerant between the receiver and the compressor; And
An injection valve for selectively opening and closing the cooling pipe;
Heating and cooling device of the boarding bridge further comprising. The method of claim 9,
The injection valve,
The cooling and heating device of a boarding bridge for cooling the compressor when the refrigerant measured by the temperature sensor is a predetermined temperature or more during the cooling operation. The method of claim 1,
A cooling unit for cooling the outdoor heat exchanger by cooling the cooling water with cold generated by evaporation of the refrigerant in the indoor heat exchanger during a cooling operation;
Heating and cooling device of the boarding bridge further comprising. The method of claim 11,
The cooler,
A cooling water tank storing the cooling water;
A cooling water coil in communication with the cooling water tank and disposed on the indoor heat exchanger;
A cooling member disposed on the outdoor heat exchanger; And
A cooling water pipe communicating the outdoor heat exchanger with the cooling water tank;
Heating and cooling device of the boarding bridge further comprising. The method of claim 12,
The cooling member,
Air-conditioning system of boarding bridge made of corrosion-resistant material. The method of claim 13,
The cooling member,
Heating and cooling system of a boarding bridge in the form of a coil. The method of claim 13,
The cooling member,
Air-conditioning system of boarding bridge in the form of nonwoven fabric.

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