JPH0681900U - Ground Air Conditioner for Aircraft - Google Patents

Abstract

(57) [Abstract] [Purpose] To achieve the same primary cooling effect as the conventional one while reducing the number of components, and to reduce the weight and size of the entire device. [Structure] A water jacket 20 is formed on a body portion of a blower blower 1 of a blower system of an aircraft ground air conditioner,
This water jacket 20 is a water tank 7 for storing condensed water discharged from the air cooling unit 6 by the evaporator of the blower system.
Is connected to the pipe 22 with a solenoid valve 24 which is controlled to open / close by a signal of a control system corresponding to a thermosensor and a means 23 for manually opening / closing the pipe line. The blower blower is provided when the solenoid valve 24 is opened. Condensed water 13 in the water tank 7 is supplied to the water jacket 20 with the static pressure as the water supply pressure to cool the air in the blower blower.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ground air conditioner for aircraft, which is intended to reduce the weight and size of the entire device.

[0002]

[Prior art]

 As a ground air conditioner for aircraft, a trailer is equipped with a drive source, drive transmission system, refrigerant system, blower system and control system to supply cool air and warm air to the cabin to cool and heat various electronic devices of the aircraft and guest rooms. For example, Japanese Utility Model Publication No. Sho 60-32835 discloses such a method.

As shown in FIG. 3, the blower system of the above-mentioned ground air conditioner for an aircraft is provided with a silencer 2 on the suction side of a blower blower 1, and a precooler 3 and a precooler fan 4 on the blowout side of the blower blower 1. A plurality of evaporators 6 and 6 are arranged in the evaporator chamber 5 provided on the downstream side of the precooler 3, and the evaporator chamber 5 and the water tank 7 are connected by the pipes 8 and 8 and provided in the water tank 7 and the precooler 3. The nozzle 9 is connected by the pipe 10 and the solenoid valve 11 and the flow rate control valve 12 provided on the pipe 10 are opened and closed to spray the condensed water 13 collected in the water tank 7 from the nozzle 9 to the precooler 3 through the pipe 10. Is configured to.

In the above-mentioned aircraft ground air conditioner, the outside air sucked from the silencer 2 is adiabatically compressed by the blower blower 1 and then cooled when passing through the precooler 3 and the evaporator 6, and the cooled air is cooled. The air is sent from the duct 14 to the aircraft side to cool various electronic devices and cabins of the aircraft. In this case, the precooler 3 primarily cools the air adiabatically compressed by the blower blower 1, and collects cold condensed water separated from the air in the evaporator chamber 5 into the water tank 7 in order to further improve the capacity. Then, the collected condensed water 13 is sprayed from the nozzle 9 to the precooler 3 through the pipe 10 to cool the precooler 3.

Further, the ground air conditioner for an aircraft generally has a capacity of 10 to 40 kg / min of air volume and a static pressure of 2000 to 3000 mmAq, and the temperature of the blown air is kept at about 10 ° C. Is set to.

[0006]

[Problems to be solved by the device]

 The above-mentioned aircraft ground air conditioner requires a precooler, a fan for feeding the outside air to the precooler, and a fan driving device for primary cooling of the air adiabatically compressed by the blower blower, so the overall weight of the device increases. However, there is a problem that the cost will increase as well.

The present invention has been made in view of the above points, and provides an aircraft ground air conditioner that achieves a primary cooling effect equivalent to that of a conventional one while reducing the number of constituent members to reduce the weight and size of the device. The purpose is to provide.

[0008]

[Means for Solving the Problems]

 The ground air conditioner for aircraft of the present invention is equipped with a drive source, a drive transmission system, a refrigerant system, a blast system and a control system on a trailer, and a water jacket is formed on the body part of a blast blower of the blast system. The jacket is connected to a water tank that stores condensed water from the air cooling section of the evaporator of the ventilation system by piping, and a solenoid valve that is controlled to open and close by a signal of the control system corresponding to the thermosensor and a conduit are manually connected to this piping. A means for opening and closing is provided, and when the solenoid valve is opened, the static pressure of the blower blower is used as the water supply pressure, and the condensed water in the water tank is supplied to the water jacket to cool the air in the blower blower.

[0009]

[Action]

 In the ground air conditioner for aircraft of the present invention, the condensate water having a temperature lower than that of the outside air is supplied to the water jacket formed on the body part of the blower blower by using the static pressure of the blower blower as the water pressure when the solenoid valve is opened to supply the blower blower. Air that has been adiabatically compressed by and is heated by the water jacket is primary-cooled by heat exchange, and the air that has been primary-cooled is secondary-cooled by the evaporator and sent to the aircraft side to cool various electronic devices and cabins.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1, the same members as those in FIG. 3 are designated by the same reference numerals. In FIG. 1, reference numeral 20 denotes a water jacket provided on a body portion of a blower blower 12 of a blower system of a ground air conditioner for an aircraft. A heat insulating material layer 21 is provided on an outer peripheral surface of the water jacket 20. The temperature of 20 is kept low. The water jacket 20 and the bottom of the water tank 7 are connected by a pipe 22 so that the condensed water 13 of the water tank 7 is sent to the water jacket 20. A manual opening / closing valve 23 and a solenoid valve 24 are arranged in the pipe 22, and the solenoid valve 24 is controlled to be opened / closed by a controller 25. The control device 25 includes a thermosensor 26 provided on the silencer 2 located on the suction side of the blower blower 1, a thermosensor 27 provided between the blower blower 1 and the evaporator chamber 5, and a thermosensor provided at the outlet of the duct 14. Twenty eight detection signals are sent. The control device 25 compares the detection signals of these thermosensors 26, 27, 28 with the set temperature, and when the detection signals of the thermosensors 26, 27, 28 exceed the set temperature, the control device 25 issues the control. The electromagnetic valve 24 is opened by the signal, and the electromagnetic valve 24 is controlled to be closed if the detection signals of the thermosensors 26, 27, 28 are below the set temperature. A heat insulating material layer 29 is provided around the pipe 22 as in the water jacket 20. Similarly, a heat insulating material layer 30 is provided around the water tank 7, and a heat insulating material layer 31 is provided around the pipe 8.

FIG. 2 shows a water jacket 20 formed on the body of the blower blower 1. An impeller 41 is supported by a bearing 42 in the housing 40 of the body. The impeller 41 is connected to a motor 44 via pulley means 43. The housing 40 is provided with an air inlet 45 and an air outlet 46, respectively, and the air introduced from the air inlet 45 and the condensed water are heat-exchanged through the water jacket 20 and cooled. The discharged air is discharged from the air discharge port 46.

Although not shown, by providing heat transfer fins inside the housing 40, the cooling effect can be improved to a cooling efficiency of about 0.7.

The operation will be described below. First, in order to store condensed water in the water tank 7, the pre-cooling operation of the aircraft ground air conditioner is performed without being connected to the aircraft. This pre-cooling operation is performed with the manual on-off valve 23 provided in the pipe 22 closed, and cools the adiabatic compressed air by the operation of the blower blower 1 through the evaporator 6 to generate condensed water. The generated condensed water is stored in the water tank 7 through the pipe 8. In this pre-cooling operation, the condensed water stored in the water tank 7 can be 20 to 30 liters / hour for 0 to 10 ° C. The capacity of the water tank is about 350 liters.

After a predetermined amount of condensed water is stored in the water tank 7 by this pre-cooling operation, it is connected to the aircraft and the main operation of the aircraft ground air conditioner is started. At this time, the manual on-off valve 23 provided in the pipe 22 is kept open. In this operation, the air adiabatically compressed by the operation of the blower blower 1 is sent to the evaporator chamber 5 through the air discharge port 46, cooled by the refrigerant system by the evaporator 6, and sent to the aircraft side via the duct 14. In this operation as well, as in the pre-cooling operation, condensed water is generated and added to the water tank 7. On the other hand, since the evaporator chamber 5 and the water tank 7 communicate with each other through the pipe 8, the condensed water 13 stored in the water tank 7 when the solenoid valve 24 is opened passes through the pipe 22 with the blower static pressure as the water pressure. Water is supplied to the water jacket 20. Since the temperature of the condensed water 13 supplied to the water jacket 20 is much lower than the temperature of the air adiabatically compressed by the blower blower 1, the adiabatically compressed air is primarily cooled through the water jacket 20. At this time, the temperature of the air flowing from the blower blower 1 to the duct 14 is determined by a thermosensor 26 provided on the silencer 2 on the suction side of the blower blower 1, a thermosensor 27 provided between the blower blower 1 and the evaporator chamber 5, The detection signals of the thermosensors 26, 27, 28 detected by the thermosensors 28 provided at the outlets of the ducts 14 are sent to the control device 25. In the control device 25, the detection signals of these thermosensors 26, 27, 28 are detected. Is compared with a preset temperature set in the controller 25, and if the detected values of the thermosensors 26, 27, 28 exceed the preset temperature, the solenoid valve 24 is opened by a control signal from the controller 25. . The water supply of the condensed water 13 of the water tank 7 to the water jacket 20 can be manually controlled by opening and closing the manual opening / closing valve 23.

The measurement results when the air is primarily cooled are shown below. Air temperature at outlet of blower blower for primary cooling according to the present invention 43 ° C Air temperature at outlet of blower blower without primary cooling approx. 70 ° C Air temperature at outlet of blower blower for primary cooling by conventional precooler 45 ° C Due to primary cooling The air temperature is calculated by the following formula. Here, it is assumed that the outside air temperature is 40 ° C, the air temperature set value at the outlet of the blower blower is 45 ° C, and the main operation time per day is 1 hour.

(Cooling heat amount) = (Temperature difference between condensed water and air) × (Specific heat of water) × (Flow rate) × (Cooling efficiency) = (45−5) ° C. × 1 Kcal / kg ° C. × 350 kg / hour × 0 0.7 = 9800 Kcal / hour (compression heating amount) = (70-40) x (air specific heat) x (air volume) x (hour) = 30 ° C x 0.24 Kcal / kg ° C 25 kg / min x 60 minutes = 10800 Kcal / Time (Blower outlet air temperature) = (10800-9800) /0.24×25×60 + 40 = 43 ° C. This blower blower outlet air temperature 43 ° C. is when the precooler of the conventional device is used. It becomes almost equal to or less than ℃.

[0017]

[Effect of device]

 As described above, according to the present invention, it is possible to obtain the same primary cooling effect as that of the conventional one without providing a precooler, and the devices such as the precooler, the precooler fan and the drive source are not required. It is possible to reduce the number of constituent members and to reduce the weight and size of the entire device. In addition, the noise reduction effect can be improved by surrounding the blower blower, which is a noise source, with a flow path.

[Brief description of drawings]

FIG. 1 is an overall view of an aircraft ground air conditioner according to the present invention.

FIG. 2 is a view showing a water jacket portion of an aircraft ground air conditioner according to the present invention.

FIG. 3 is an overall view of a conventional aircraft ground air conditioner.

[Explanation of symbols]

 1 Blower Blower 5 Evaporator Chamber 6 Evaporator 7 Water Tank 8 Piping 13 Condensed Water 20 Water Jacket 22 Piping 23 Manual Open / Close Valve 24 Solenoid Valve

Claims (1)

[Scope of utility model registration request] Claims: 1. A trailer equipped with a drive source, a drive transmission system, a refrigerant system, a blower system and a control system, for cooling and heating various electronic devices of an aircraft and passenger compartments on the ground. In an aircraft ground air conditioner that supplies air to the aircraft, a water jacket is formed on the body of the blower of the blower system, and this water jacket is piped to a water tank that collects the condensed water from the air cooling unit by the evaporator of the blower system. In this pipe, a solenoid valve that is controlled to open and close by a signal of a control system according to the thermosensor and a means for manually opening and closing the pipeline are provided, and when the solenoid valve opens, the blower blower static pressure is used as the water pressure, An aircraft ground air conditioner characterized by supplying condensed water from a water tank to a water jacket to cool the air in a blower blower.