JP5474628B2 - Cold air supply facility for parked aircraft and cold air supply method for parked aircraft - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold air supply facility for supplying cold air to a parked aircraft, and more particularly to a cold air supply facility for a parked aircraft capable of shortening the defrosting time and saving energy and a cold air supply method to the parked aircraft. .

  At the airport, ground services such as the supply of cold air to the parked aircraft are provided. Cold air supply to an aircraft is performed by connecting an air supply flexible hose extending from a cold air supply facility called a ground cooler to the aircraft. The cold air supply facility has an after coil for cooling the air, and a brine as a refrigerant flows through the after coil. During the operation of the cold air supply facility, the cooling capacity is reduced due to the attachment of frost to the surface of the after coil, so it is necessary to perform defrosting (defrosting).

  Conventionally, a technique for removing frost adhered to the surface of a heat exchanger using the heat of brine (for example, see Patent Document 1), or a technique for melting freezing using warm air in an open cooling tower (for example, , See Patent Document 2). In addition, a technique for preventing anti-freezing by heating antifreeze in a snow making facility such as an artificial ski resort (see, for example, Patent Document 3), or frost adhering to a heat exchanger by water supply in a heat pump air conditioner. A technique for removing it (see, for example, Patent Document 4) is also known.

JP 2006-234227 A JP 2003-194492 A Japanese Patent Publication No. 7-71608 JP 2010-2156 A

  However, in the above-described cold air supply facility called a ground cooler that supplies cold air to an aircraft, defrosting is performed by heating the brine with an electric heater provided in the brine piping system, so a large amount of energy is required and the defrosting is performed. There is a problem that the time required for the process becomes longer. That is, in order to perform defrosting, it is necessary to raise the total amount of brine held up to a predetermined temperature, and there is a problem that the energy required for raising the temperature increases and the time required for defrosting becomes longer.

  Specifically, in the conventional grand cooler, it is necessary to defrost by raising the total amount of blanc-in that has been cooled to −6 ° C. to 0 ° C., and to cool the brine again to −6 ° C. at the end of the defrost. There is. Therefore, defrost requires a large amount of wasted energy, and the time required for defrost is also long. Here, it is possible to apply an off-cycle defrost that simply stops the operation of the blownler that cools the brine and melts the frost only by the heat of the air supply, but the brine flows into the aftercoil due to the residual operation of the blownler, Further, since the brine in the after coil retains cold heat even after the flow of brine stops, there is a problem that it takes more time to defrost.

  In airports, it is necessary to supply cold air to the aircraft in accordance with the parking time, and therefore the cold air supply facility is required to reduce the defrost time as much as possible.

  In the technique of Patent Document 1, since the temperature of the brine is increased by the heater as in the above-described ground cooler, the energy for increasing the temperature of the brine is increased, and the time required for defrosting is increased. The technique of Patent Document 2 relates to an open-type cooling tower, and cannot be applied to an apparatus that supplies cold air by flowing brine into an after coil. In the snow making facility of Patent Document 3, since the antifreeze liquid is heated by the liquid heater, a large amount of energy is required as well. The technique of patent document 4 removes frost using the water at the time of heating operation, and cannot be applied to said cold air supply equipment called a grand cooler.

Accordingly, an object of the present invention is to provide a cold air supply facility for a parked aircraft and a method for supplying cold air to a parked aircraft capable of reducing useless energy at the time of defrost, shortening the defrost time and saving energy. And

The invention according to claim 1 in order to achieve the above object, in order to the cold and heat exchanger supplied to parked aircraft, have a cooling coil through which brine is controlled at 0 ℃ below, A cold air supply facility for a parked aircraft, wherein a brine chiller that cools brine supplied to the cooling coil, a brine tank that stores the brine from the cooling coil, and the brine from the brine tank are A brine pump for supplying to the cooling coil, and at the time of defrosting operation for removing frost adhering to the cooling coil, the brine in the cooling coil is discharged into the brine tank so as to be external to the cooling coil. causes air to flow to circulate without the brine of the brine tank passing the cooling coil, the It is a cool air supply facility for parked aircraft.
According to a second aspect of the present invention, in the cold air supply facility for the parked aircraft according to the first aspect, a pipe line connecting the cooling coil and the brine tank is provided in the cooling coil after the defrost operation is completed. An air vent valve is provided for discharging the remaining outside air to the outside.
According to a third aspect of the present invention, in the cold air supply facility for a parked aircraft according to the first or second aspect, the brine from the blownler is selectively supplied to the cooling coil or the brine tank by a valve switching operation. It is possible to supply to.

  According to the present invention, during the defrost operation, the frost attached to the cooling coil is warmed by the heat of the outside air flowing into the cooling coil, and the frost can be removed. Further, during the defrost operation, since the brine in the cooling coil is discharged, the cooling coil can be heated in a short time by reducing the heat capacity of the cooling coil, and defrosting can be performed in a short time.

According to a fourth aspect of the present invention, in the cold air supply facility for a parked aircraft according to any one of the first to third aspects, the cooling coil is provided above the brine tank, During the defrosting operation, the brine in the cooling coil is dropped into the brine tank by its own weight due to the inflow of the outside air into the cooling coil.

The invention according to claim 5 includes a cooling coil through which brine adjusted to 0 ° C. or less flows in order to exchange heat with the cold air supplied to the parked aircraft, and supplies cold air to the parked aircraft A facility for cooling a brine supplied to the cooling coil, a brine tank for storing the brine from the cooling coil, and a brine pump for supplying the brine from the brine tank to the cooling coil And a cold air supply method to a parked aircraft in a cold air supply facility to a parked aircraft, wherein during the defrost operation to remove frost adhering to the cooling coil, the brine in the cooling coil is replaced with the brine Exhaust air is allowed to flow into the cooling coil by discharging into the tank and the brine in the brine tank is cooled. Forming a bypass path for circulating by the brine pump without passing through the coil, a cold air supplying method to the parked aircraft, characterized in that.
The invention according to claim 6 includes a cooling coil through which brine adjusted to 0 ° C. or less flows in order to exchange heat with the cold air supplied to the parked aircraft, and supplies the cold air to the parked aircraft A facility for cooling a brine supplied to the cooling coil, a brine tank for storing the brine from the cooling coil, and a brine pump for supplying the brine from the brine tank to the cooling coil And a cold air supply method to a parked aircraft in a cold air supply facility to a parked aircraft, wherein during the defrost operation to remove frost adhering to the cooling coil, the brine in the cooling coil is replaced with the brine Exhaust air is allowed to flow into the cooling coil by discharging into the tank and the brine in the brine tank is cooled. Is circulated without passing through the coils, to continue the operation of the brine chiller, cooling the brine of the brine tank, a cold air supplying method to the parked aircraft, characterized in that.

According to the first aspect of the present invention, since the brine is discharged from the cooling coil during the defrost operation, the heat capacity of the cooling coil is reduced by the discharge of the brine, and the heat of the outside air flowing into the cooling coil is reduced. This makes it possible to defrost in a short time. Therefore, the defrost time can be shortened, and it is possible to reliably supply the cold air to the aircraft within the parking time.
In addition, since the defrost uses the heat of the air outside the machine that flows into the cooling coil, it is possible to reduce the energy required for the defrost compared to the conventional technology in which the total amount of brine is heated with an electric heater. Thus, energy saving can be achieved. Further, by circulating the brine without passing through the cooling coil, unnecessary energy required for re-cooling the brine at the time of restart becomes unnecessary, and the cooling response of the brine at the time of returning from the defrost operation to the normal operation is also achieved. Get faster.

According to the second aspect of the present invention, the pipe connecting the cooling coil and the brine tank is provided with an air vent valve that discharges the remaining outside air in the cooling coil to the outside after the defrost operation is completed. Since it did in this way, it can avoid that external air mixes in a brine, can maintain the cooling capacity of an installation, and can prevent the corrosion of the pipe line by air mixing.
According to the third aspect of the present invention, since the brine from the blownler can be selectively supplied to the cooling coil or the brine tank by the valve switching operation, the switching operation from the normal operation to the defrost operation is facilitated. .

According to the fourth aspect of the present invention, since the cooling coil is provided above the brine tank, discharge of the brine in the cooling coil to the brine tank can be promoted by the dead weight of the brine.

According to the fifth aspect of the present invention, by forming the bypass path, useless energy required for recooling the brine at the time of restart becomes unnecessary, and cooling of the brine at the time of returning from the defrost operation to the normal operation is eliminated. Responsiveness also becomes faster.
According to the sixth aspect of the invention, since the brine is circulated without passing through the cooling coil, it is possible to cope with the residual operation of the blownler and to perform the defrost immediately. .

It is a front view which shows the outline | summary of the cold air supply equipment to the parking aircraft concerning Embodiment 1 of this invention. FIG. 2 is a perspective view illustrating a connection relationship between devices in the cold air supply facility of FIG. 1. It is a perspective view which shows the flow of the brine at the time of normal operation in the cold air supply equipment of FIG. It is a perspective view which shows the flow of the brine at the time of the defrost driving | operation in the cold air supply equipment of FIG. It is a schematic diagram of the cold air supply equipment to the parking aircraft concerning Embodiment 2 of this invention.

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

(Embodiment 1)
1 to 4 show Embodiment 1 of the present invention. 1 is generally called a grand cooler and is used to supply cold air to an aircraft parked at an airport. As shown in FIG. 1, the cold air supply facility 1 has a device storage chamber 2. Various devices are stored in the room 3 of the device storage chamber 2. Below the room 3, a brine tank 4 for storing brine B as a refrigerant is provided. In the vicinity of the brine tank 4, a blownler (refrigerator) 6 for cooling the brine B is provided. A brine pump 5 is provided in the middle of a pipeline 21 connecting the brine tank 4 and the branler 6. The brine pump 5 has a function of supplying the brine B from the brine tank 4 to an after coil 14 to be described later via the blownler 6.

  As shown in FIG. 1, a cold air supply unit 11 is provided above the room 3. In the cold air supply unit 11, a pre-coil 12, a main coil 13, and an after coil 14 as a cooling coil are arranged in order from the upstream side. A blower 15 is disposed upstream of the precoil 12. The blower 15 has a function of supplying the cold air created in the cold air supply unit 11 to an aircraft parked at the airport. During normal operation of the cold air supply facility 1, for example, the precoil 12 has a cooling capacity for reducing 48 ° C. air to 35 ° C., and the main coil 13 further reduces the 35 ° C. air cooled by the precoil 12 to 10 ° C. It has a cooling capacity to be reduced. The after-coil 14 has a cooling capability for reducing the air at 10 ° C. cooled by the main coil 13 to −2 ° C.

  The pre-coil 12 has a function of creating cold air using the cooling water W from the cooling tower 7 disposed on the side surface side of the room 3. The cooling tower 7 is supplied with a constant amount of cold water W through a water supply pipe 8. The outer surface of the cooling tower 7 is provided with a gallery 7c for allowing outside air to flow into the cooling tower 7. The cooling water W sprayed from the water sprinkler 7b flows into the cooling tower 7 by the fan 7a. It is cooled by the outside air. The cooling water W in the cooling tower 7 is supplied to the condenser of the blownler 6 via the water supply pipe 35. A pump 9 for sending the cooling water W to the blownler 6 and the precoil 12 is provided in the middle of the water supply pipe 35. Further, the switching of the supply of the cooling water W to the brachinler 6 and the precoil 12 and the distribution amount thereof can be adjusted by an adjustment valve (not shown). The cooling water W supplied to the blownler 6 is returned into the cooling tower 7 through the return pipe 37. The downstream end of the return pipe 37 is connected to a sprinkler 7 b provided in the cooling tower 7. The precoil 12 has an inflow side connected to a water supply line 35 via a pipe line 36 and an outflow side connected to a return line 37 via a pipe line 38.

  The main coil 13 has a function of generating cold air using cold water W1 supplied from a heat supply plant called district cooling / heating (DHC) to a house or a building in the same region. The main coil 13 has an inflow side connected to a water supply pipe 31 from the DHC side, and an outflow side connected to a drain pipe 32 extending to the DHC side. In this embodiment, the chilled water W1 supplied to the main coil 13 is configured to be supplied from the DHC. However, the present invention is not limited to this. For example, the chilled water W that cools the Blainchler 6 is supplied to the main coil 13. It is good also as a structure to supply.

  The after coil 14 as a cooling coil has a function of generating cold air using the brine B cooled to about minus 6 ° C. As shown in FIG. 1 and FIG. 2, the inflow side of the after coil 14 is connected to the brainler 6 via a conduit 22. A first electromagnetic valve 26 that opens and closes the pipeline 22 is provided in the middle of the pipeline 22. An upstream end of the pipe line 25 is connected between the first electromagnetic valve 26 and the after coil 14 in the pipe line 22. The downstream end of the conduit 25 extends into the brine tank 4. A second electromagnetic valve 27 that opens and closes the conduit 25 is provided in the middle of the conduit 25. The upstream end of the pipe line 23 is connected between the first electromagnetic valve 26 and the branler 6 in the pipe line 22. The downstream end of the pipe line 23 extends into the brine tank 4. A third electromagnetic valve 28 that opens and closes the pipeline 23 is provided in the middle of the pipeline 23.

  The upstream end of the conduit 24 is connected to the outflow side of the after coil 14. The downstream end of the pipe line 24 extends into the brine tank 4. A fourth electromagnetic valve 29 is provided in the middle of the conduit 24 to allow the outside air A1 to flow into the after coil 14. An automatic air bleeding valve 30 as an air bleeding valve is provided between the fourth electromagnetic valve 29 and the brine tank 4 in the pipe line 24. Each solenoid valve 26-29 is comprised from the two-way solenoid valve opened and closed by an electrical signal. The automatic air vent valve 30 has a function of automatically discharging the outside air A1 remaining in the after coil 14 after defrosting to the outside. The fourth solenoid valve 29 may be provided in the pipeline 22 that is the outgoing pipe of the brine B. However, in this embodiment, the pipeline 24 that is the return pipe of the brine B is positioned higher than the pipeline 22. For this reason, it is provided in the pipeline 24. Further, in this embodiment, the fourth electromagnetic valve 29 is used to allow the outside air A1 to flow into the after-coil 14, but the vacuum state is increased in place of the fourth electromagnetic valve 29. It is good also as a structure which employ | adopts the vacuum breaker valve used for switching to an atmospheric pressure state.

  As shown in FIG. 4, the second solenoid valve 27 and the fourth solenoid valve 29 are opened when the defrost operation is started, and the outside air A <b> 1 flows into the after coil 14, and all the inside of the after coil 4 The brine B is discharged into the brine tank 4. The first solenoid valve 26 and the third solenoid valve 28 have a function of forming a bypass path 20 through which the brine B in the brine tank 4 is circulated by the brine pump 5 without passing through the after coil 14 during the defrost operation. doing. That is, during the defrost operation, the first electromagnetic valve 26 is closed and the third electromagnetic valve 28 is opened, whereby the bypass path 20 is formed and the supply of the brine B to the after coil 14 is performed. It is supposed to be stopped.

  4, the bypass path 20 includes a bypass line 20a between the brine tank 4 and the brine pump 5, a bypass line 20b between the brine pump 5 and the blownler 6, and a branchler. 6 and a bypass line 20c between the brine tank 4 and the brine tank 4. When the bypass path 20 is formed, the brine B flows from the brine tank 4 through the brine pump 5 to the Blancinler 6 and is returned from the Blancinler 6 to the brine tank 4. In this way, the bypass path 20 is formed and the brine B is circulated, so that it takes time to start up the stopped blownler 6 again. Therefore, the operation of the blownler 6 is continued even during the defrost operation. This is because it is possible to send cold air to the parked aircraft immediately after the operation.

  In the first embodiment, the brine pump 5, the blownler 6, the electromagnetic valves 26 to 29, and other electric devices are electrically connected to an electric control device (not shown) of the cold air supply facility 1. The operation is performed by a command from the electric control device.

  Next, the operation and action of each device during the defrost operation in the first embodiment will be described.

  FIG. 3 shows the flow of brine B during normal operation in the cold air supply facility 1. As shown in FIG. 3, during the normal operation, the brine B stored in the brine tank 4 is supplied to the blownler 6 by the brine pump 5. The brine B <b> 1 supplied to the bronchler 6 is cooled to −6 ° C., for example, and then supplied to the after coil 14 by the brine pump 5. Thereby, the air in the cold air supply unit 11 is cooled by the after-coil 14, and this cold air is supplied to the aircraft parked at the airport by the blower 15. Then, the brine B <b> 2 that has cooled the after coil 14 is returned to the brine tank 4 through the pipe line 24.

  When the normal operation in the cold air supply facility 1 is continued, moisture in the surrounding air cooled by the after coil 14 becomes frost and adheres to the surface of the after coil 14. When frost adhering to the after coil 14 increases, heat exchange with air is hindered and the cooling capacity of the air is reduced, so that defrost (defrosting) is performed as necessary. The time of defrosting is performed based on a timer or a command signal of the cold air supply facility 1. In this embodiment, the brine B from the blownler 6 can be selectively supplied to the after coil 14 or the brine tank 4 by the switching operation of the electromagnetic valves 26 to 29, so that the switching from the normal operation to the defrost operation is performed. Can be performed automatically, and operation becomes easy.

  FIG. 4 shows the flow of brine B during the defrost operation in the cold air supply facility 1. During the defrost operation, the first electromagnetic valve 26 is closed, so that the brine B is not supplied to the after coil 14. The brine B circulates in the bypass path 20 formed by the operations of the first electromagnetic valve 26 and the third electromagnetic valve 28. Here, during the defrost operation, the second solenoid valve 27 and the fourth solenoid valve 29 are opened, so that the inside of the after coil 14 is in communication with the atmosphere, and the outside air A1 is placed in the after coil 14. be introduced. Thereby, the brine B in the after coil 14 is discharged to the brine tank 4. That is, since the after coil 14 is provided above the brine tank 4, the entire amount of the brine B in the after coil 14 falls into the brine tank 4 due to its own weight.

  During the defrost operation, the outside air A1 is introduced into the aftercoil 14, so that the frost attached to the aftercoil 14 is warmed by the heat of the outside air A1 introduced into the aftercoil 14, and the frost is removed. Is possible. Further, during the defrost operation, the heat capacity of the aftercoil 14 is reduced due to the discharge of the brine B from the inside of the aftercoil 14, so that the aftercoil 14 is warmed in a short time by the heat of the outside air A1 introduced into the aftercoil 14. Can be defrosted in a short time. Here, since the outside air A1 introduced into the after-coil 14 is cooled by the heat of vaporization accompanying the evaporation of frost, the cold air supplied to the aircraft by the blower 15 even when the operation of the blownler 6 is stopped. It is possible to prevent the temperature from rising.

  When the defrost operation is completed, the connection of the pipeline is switched by the operation of each of the electromagnetic valves 26 to 29, and the brine B in the brine tank 4 is supplied to the after coil 14 again. In this state, the outside air A1 remains in the after coil 14, but the remaining outside air A1 is discharged to the outside through the automatic air vent valve 30, so that the cold air supply facility 1 The cooling capacity can be maintained, and corrosion of the pipe line due to the outside air A1 can be prevented.

  As described above, since the brine B is discharged from the after coil 14 during the defrost operation, the heat capacity of the after coil 14 is reduced by the discharge of the brine B, and the heat of the outside air A1 introduced into the after coil 14 is reduced. This makes it possible to defrost in a short time. Therefore, the defrost time can be shortened, and it is possible to reliably supply the cold air to the aircraft within the parking time.

  Further, since the defrost uses the heat of the outside air A1 flowing into the after coil 14, the energy required for the defrost can be reduced as compared with the conventional technique in which the total amount of brine is heated by the electric heater. Energy saving. Furthermore, by forming the bypass path 20, useless energy required for re-cooling the brine B at the time of restart becomes unnecessary, and the response of cooling of the brine B at the time of returning from the defrost operation to the normal operation becomes faster. Further, even when the operation of the air conditioner itself is stopped and it is not necessary to continue the operation of the blownler 6, it is necessary to keep the cooling water W flowing, that is, the residual operation, in order to protect the equipment of the blownler 6. On the other hand, in this embodiment, since the bypass path 20 is constructed, it is possible to cope with the residual operation of the blownler 6, and it is possible to immediately perform defrosting.

(Embodiment 2)
FIG. 5 shows a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is only the configuration of the path for bypassing the brine B, and the other parts are the same as those of the first embodiment. Therefore, the description of the conforming part is omitted.

  As shown in FIG. 5, the branchler 6 and the brine tank 4 are connected via a pipe line 41 that is an outgoing pipe and a pipe line 42 that is a return pipe. In the middle of the pipeline 41, a second brine pump 5 b that supplies the brine B from the blownler 6 to the brine tank 4 is provided. The brine tank 4 and the after coil 14 are connected to each other via a pipe line 43 that is an outgoing pipe and a pipe line 24 that is a return pipe. A first brine pump 5 a that supplies the brine B in the brine tank 4 to the after coil 14 is provided in the middle of the pipeline 43. An electromagnetic valve 26 is provided between the first brine pump 5 a and the after coil 14 in the pipe line 43. The after coil 14 and the brine tank 4 are connected via a conduit 24 that is a return pipe. An electromagnetic valve 29 and an automatic air vent valve 30 are provided in the middle of the pipe line 24 as in the first embodiment. Between the first brine pump 5 a and the electromagnetic valve 26 in the pipeline 43, the upstream end of the pipeline 44 for returning the brine B to the brine tank 4 is connected. The downstream end of the conduit 44 extends into the brine tank 4. An electromagnetic valve 28 is provided in the middle of the conduit 44.

  The electromagnetic valve 26 and the electromagnetic valve 28 have a function of forming a bypass path 50 through which the brine B in the brine tank 4 is circulated by the brine pump 5a without passing through the after coil 14 during the defrost operation. That is, during the defrost operation, the solenoid valve 26 is closed and the solenoid valve 28 is opened, whereby the bypass path 50 is formed and supply of the brine B to the after coil 14 is stopped. Yes. The bypass path 50 includes a part of the pipe line 43 and the pipe line 44. When the bypass path 50 is formed, the brine B flows in a direction indicated by a broken line in FIG. Thus, the bypass path 50 is formed and the brine B is circulated in the same manner as in the first embodiment, the operation of the blownler 6 is continued during the defrost operation, and after the defrost operation is completed, the vehicle is parked. This is because it is possible to send cool air to the aircraft immediately.

  In the second embodiment configured as described above, during normal operation, the electromagnetic valve 26 is opened and the electromagnetic valve 28 is closed, so that the brine B in the brine tank 4 is supplied to the after coil 14, The after-coil 14 creates cold air that is supplied to the aircraft.

  During the defrost operation, the electromagnetic valve 26 is closed, so that the brine B is not supplied to the after coil 14. The brine B circulates in the bypass path 50 formed by the operation of the electromagnetic valve 26 and the electromagnetic valve 28. Here, the brine B in the brine tank 4 is cooled by the operation of the second brine pump 5b and the blownler 6 even during the defrost operation. During the defrosting operation, the solenoid valve 29 is opened and the inside of the after coil 14 is in communication with the atmosphere, so that the outside air flows into the after coil 14, so that the brine B in the after coil 14 is entirely brined by its own weight. It falls into the tank 4. Thereby, the frost adhering to the surface of the after-coil 14 is warmed by the heat of the external air which flowed into the after-coil 14, and the frost can be removed in a short time.

  In the second embodiment, a temperature sensor for measuring the temperature of the brine B is provided in the pipeline 43 or the brine tank 4 which is the outgoing pipe in order to achieve a constant temperature of the brine B supplied to the after-coil 14. It is good also as a structure provided with the controller which controls the rotation speed of the compressor of the Blinchler 6 and the brine pump 5b based on the signal from a sensor.

  The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like without departing from the gist of the present invention, It is included in this invention. For example, in the first embodiment, the flow direction of the brine B is controlled by using two solenoid valves, the first solenoid valve 26 and the second solenoid valve 27, but the pipeline 22 and the pipeline 25. If a three-way solenoid valve is provided at the branch portion 22a, the flow direction of the brine B during normal operation and defrost operation can be controlled by one three-way solenoid valve, and the configuration of the pipe line is simplified. It becomes possible to do.

  Further, in order to promote the discharge of the brine B to the brine tank 4 during the defrosting operation, it is preferable that the after coil 14 is disposed at a position higher than the brine tank 4.

DESCRIPTION OF SYMBOLS 1 Cold air supply equipment 4 Brine tank 5 Brine pump 6 Blinchler 7 Cooling tower 11 Cold air supply part 12 Precoil 13 Main coil 14 After coil (cooling coil)
15 Blower 20 Bypass Path 26 First Solenoid Valve (Valve)
27 Second solenoid valve (valve)
28 Third solenoid valve (valve)
29 4th solenoid valve A1 Outside air B Brine

Claims (6)

To the cold and heat exchanger supplied to parked aircraft, it has a cooling coil through which brine is controlled at 0 ℃ below, a cold air supply system to the parked aircraft,
A brachinler for cooling the brine supplied to the cooling coil;
A brine tank for storing the brine from the cooling coil;
A brine pump for supplying the brine from the brine tank to the cooling coil;
With
At the time of defrost operation for removing frost attached to the cooling coil, the brine in the cooling coil is discharged into the brine tank to allow outside air to flow into the cooling coil and the brine tank. Circulating brine without passing through the cooling coil ;
A cool air supply facility for parked aircraft. Wherein the cooling coil and the conduit connecting the said brine tank is that has an air vent valve for discharging to the outside is provided to the outside air remaining in said cooling coil after the defrosting operation ends,
The cold air supply equipment for a parked aircraft according to claim 1. The brine from the brine chiller, Ru selectively suppliable der to the cooling coil or the brine tank by switching operation of the valve,
The cold air supply equipment for a parked aircraft according to claim 1 or 2, wherein The cooling coil is provided above the brine tank,
At the time of the defrost operation, due to the inflow of the outside air into the cooling coil, the brine in the cooling coil is dropped into the brine tank by its own weight,
The cold air supply facility for a parked aircraft according to any one of claims 1 to 3, characterized in that: In order to exchange heat with the cold air supplied to the parked aircraft, it has a cooling coil through which the brine adjusted to 0 ° C. or less flows, and is a cold air supply facility to the parked aircraft,
A brachinler for cooling the brine supplied to the cooling coil;
A brine tank for storing the brine from the cooling coil;
A brine pump for supplying the brine from the brine tank to the cooling coil;
A cold air supply method for a parked aircraft in a cold air supply facility for a parked aircraft comprising:
At the time of defrost operation for removing frost attached to the cooling coil, the brine in the cooling coil is discharged into the brine tank to allow outside air to flow into the cooling coil and the brine tank. Forming a bypass path through which brine is circulated by the brine pump without passing through the cooling coil;
A method for supplying cold air to a parked aircraft. In order to exchange heat with the cold air supplied to the parked aircraft, it has a cooling coil through which the brine adjusted to 0 ° C. or less flows, and is a cold air supply facility to the parked aircraft,
A brachinler for cooling the brine supplied to the cooling coil;
A brine tank for storing the brine from the cooling coil;
A brine pump for supplying the brine from the brine tank to the cooling coil;
A cold air supply method for a parked aircraft in a cold air supply facility for a parked aircraft comprising:
At the time of defrost operation for removing frost attached to the cooling coil, the brine in the cooling coil is discharged into the brine tank to allow outside air to flow into the cooling coil and the brine tank. Circulating the brine without passing through the cooling coil, and continuing the operation of the blownler to cool the brine in the brine tank;
A method for supplying cold air to a parked aircraft.

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