JP3118716U - Air conditioning system - Google Patents

Abstract

An air conditioning system capable of quickly setting an outlet temperature of an air conditioning apparatus is provided.
The opening degree is used to control the temperature of air introduced into the dehumidifier 2 to 0 ° C. or higher by using a temperature detection electrical signal from a temperature sensor 3 and a differential pressure detection electrical signal from a differential pressure sensor 4. The air conditioning system S includes a controller 5 that outputs a control electrical signal to the actuator 14.
[Selection] Figure 1

Description

  The present invention relates to an air conditioning apparatus for aircraft that can supply precompression air into the aircraft.

In general, an aircraft is equipped with an air conditioner in order to supply conditioned air having an appropriate temperature and pressure to a preload chamber such as a cabin or a cockpit.
In these air conditioners, for example, bleed air from an engine is supplied as conditioned air at an appropriate temperature and pressure through a compressor and a turbine and supplied to the pressurizing chamber. In addition, a dehumidifier for reducing the humidity of the conditioned air is provided before reaching the pressurized chamber from the outlet side of the air conditioner.

  A configuration for controlling the temperature of the conditioned air on the outlet side of the air conditioner will be described taking the air conditioner 201 shown in FIG. 2 as an example. The air conditioner 201 includes, for example, a cold air flow path 211 through which the cold air ca appropriately cooled from the engine is extracted, and a warm air flow path 212 through which the warm air wa, which is extracted from the engine, is mixed into the cold air flow path 211. A flow rate control valve 213 for increasing or decreasing the flow rate of the warm air wa mixed from the warm air flow channel 212 to the cool air flow channel 211 is provided. The temperature adjustment of the conditioned air in the air conditioner 201 is performed by drawing air lines 241 and 242 made of metal piping from before and after the dehumidifier 202 to the flow control valve 213, and mechanically from the differential pressure before and after the dehumidifier 202. The flow control valve 213 is controlled. More specifically, when the temperature of the conditioned air emitted from the outlet 201a side of the air conditioner 201 becomes 0 ° C. or lower, the humidity in the conditioned air freezes in the dehumidifier 202, so that the differential pressure across the dehumidifier 202 Rises. In that case, the flow control valve 213 opens mechanically in response to the increase in the differential pressure, increases the temperature of the conditioned air by mixing a large amount of warm air wa from the warm air flow path 212, and prevents freezing in the dehumidifier 202. Is set to

  3 shows that the temperature sensor 303 is disposed on the outlet 301a side of the air conditioner 301 including the cold air flow path 311 through which the cold air ca flows and the warm air flow path 312 and the flow control valve 313 has an actuator. 314 is attached. The actuator 314 reflects the opening control electric signal related to the temperature detection electric signal by the temperature sensor 303 with respect to the differential pressure before and after the dehumidifying device 302 related to the air lines 341 and 342, that is, overridden control. The controller 305 can perform the flow control valve 313 via the actuator 314.

  However, as described above, all of the conventional ones directly control the flow rate control valve by using the value of the differential pressure detected mechanically. Therefore, it is proportional to the value of the pressure difference or the value of the pressure difference. Only opening control based on this is possible. Therefore, even if the outlet temperature of the air conditioner or the differential pressure before and after the dehumidifier changes suddenly, the flow control valve can only be kept at an opening based on the value of the normal differential pressure. It took time for the outlet temperature of the air conditioner to stabilize.

  Furthermore, in the conventional ones, in order to directly use the differential pressure before and after the dehumidifier, the air pressure before and after the dehumidifier is directly guided to the flow control valve provided in the warm air flow path through the air line or the flow control valve. It was led to the actuator attached to. Therefore, in order to route the metal piping constituting the air line from the vicinity of the dehumidifying device to the flow rate adjusting valve or the actuator, there is a problem that the piping work requires man-hours. Further, in particular, when the dehumidifying device and the flow rate control valve are arranged apart from each other, some improvement has been desired for the unreasonable space and the increase in weight caused by the routing of the metal piping.

  The present invention has been made paying attention to such problems, and a main purpose thereof is to provide an air conditioning system that quickly sets the outlet temperature of the air conditioner and is advantageous in terms of piping and space. It is in.

  That is, the air conditioning system according to the present invention is provided with a dehumidifier on the outlet side of the air conditioner, and the air conditioner is connected to a cool air flow path through which the introduced cool air flows and the cold air flow path. A warm air flow path for mixing warm air, a flow control valve for increasing / decreasing the flow rate of warm air mixed from the warm air flow path to the cold air flow path, and opening control for sequentially inputting the opening of the flow control valve An actuator that opens and closes in response to an electric signal, and detects an air temperature on the outlet side of the air conditioner and upstream of the dehumidifier, and outputs the detection result as a temperature detection electric signal A sensor, a differential pressure sensor that detects a differential pressure before and after the dehumidifier, and outputs a detection result as a differential pressure detection electrical signal, at least the temperature detection electrical signal and the differential pressure And a controller for outputting the opening control electric signal to the actuator so as to control the air temperature introduced into the dehumidifying device to 0 ° C. or higher by using an intelligent electric signal. Features.

  If this is the case, by controlling the flow rate control valve using the outputs of both the temperature sensor and the differential pressure sensor, the temperature can be stabilized even in sudden changes in temperature and differential pressure. Control can be implemented. Further, since it is not necessary to provide piping from the vicinity of the dehumidifying device to the flow rate adjusting valve or the actuator, problems such as space unreasonableness and weight increase caused by piping routing can be effectively improved.

  As described above, according to the present invention, stable temperature control can be performed even in the case of a sudden change in temperature and differential pressure, and problems such as space unreasonableness and weight increase caused by piping are effective. Can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG.

  The air conditioning system S according to the present invention mainly has a configuration in which the dehumidifying device 2 is disposed on the outlet 1a side of the air conditioning device 1.

Hereinafter, the structure of each part of the air conditioning system S will be specifically described.
The air conditioner 1 mixes the cold air flow path 11 through which the introduced cool air ca flows, the warm air flow path 12 through which the warm air wa is mixed into the cold air flow path 11, and the warm air flow path 12 into the cold air flow path 11. The flow rate control valve 13 for increasing or decreasing the flow rate of the warm air wa and the actuator 14 that opens and closes the opening degree of the flow rate control valve 13 in accordance with the opening degree control electric signal sequentially input.

  The cold air flow path 11 is for circulating the cool air ca obtained by appropriately cooling the bleed air of the engine, for example, and in this embodiment, warm air that merges with a warm air flow path 12 described later in the middle of the cold air flow path 11. The mixing part 11a is provided.

  The warm air circulation path 12 is for circulating warm air wa which is, for example, engine bleed, and is provided with a flow control valve 13 in the middle of the path, and joins the warm air mixing part 11a of the cold air circulation path 11 at the most downstream. .

  The flow rate control valve 13 is for adjusting the flow rate of the warm air wa on the downstream side of the portion provided in the warm air flow path 12. Specifically, the flow rate, that is, the opening degree is adjusted based on control by an actuator 14 described later.

  The actuator 14 is attached to the flow control valve 13 and controls the opening degree of the flow control valve 13. Specifically, the controller 5 is connected to the controller 5 which will be described later via the control signal line 51, and the opening degree control electrical signal output from the controller 5 is input through the control signal line 51, The opening degree of the predetermined flow control valve 13 is controlled.

  The dehumidifier 2 is for reducing the humidity of the conditioned air flowing out from the outlet 1a of the air conditioner 1. Further, the downstream side of the dehumidifying device 2 is connected to a pressurizing chamber such as a cockpit or a cabin (not shown).

  Therefore, the air conditioning system S according to the present embodiment includes the temperature sensor 3, the differential pressure sensor 4, and the controller 5 serving as a control device.

  The temperature sensor 3 detects the temperature of the conditioned air on the outlet 1a side of the air conditioner 1 and upstream of the dehumidifier 2, and outputs the detection result to the controller 5 as a temperature detection electric signal. Specifically, the temperature sensor 3 is electrically connected to the controller 5 through a temperature signal line 31, and a temperature detection electrical signal that is a detection result by the temperature sensor 3 is output to the controller 5 through the temperature signal line 31. To do.

  The differential pressure sensor 4 detects the differential pressure before and after the dehumidifier 2, that is, upstream and downstream, and outputs the detection result as a differential pressure detection electric signal. Specifically, the differential pressure sensor 4 is connected to a predetermined position in the upstream and downstream in the vicinity of the dehumidifier 2 via the upstream air line 41 and the downstream air line 42, so that the upstream air line 41 and the downstream air line 42 are connected. It becomes the structure into which conditioned air flows in, and can detect the differential pressure | voltage of each conditioned air. On the other hand, the differential pressure sensor 4 is electrically connected to the controller 5 through a differential pressure signal line 43 and outputs the detected differential pressure to the controller 5 through the differential pressure signal line 43 as a differential pressure detection electrical signal.

  The controller 5 calculates an opening degree control electric signal using at least the temperature detection electric signal input through the temperature signal line 31 and the differential pressure detection electric signal input through the differential pressure signal line 43, and the opening degree A control electric signal is output to the actuator 14. Specifically, the controller 5 is electrically connected to the actuator 14 via the control signal line 51 while being connected to the temperature signal line 31 and the differential pressure signal line 43. To determine the opening degree of the flow control valve 13 so as to control the temperature of the air introduced into the dehumidifier 2 to 0 ° C. or higher.

  Next, an example of the operation | movement aspect which controls the temperature of the conditioned air by the side of the exit 1a of the air conditioning system S by the air conditioning system S by such a structure is demonstrated.

  First, when the differential pressure upstream and downstream of the dehumidifier 2 is normal, the detection result by the differential pressure sensor 4 is input to the controller 5 through the differential pressure signal line 43 as a differential pressure detection electric signal. The controller 5 determines from the differential pressure detection electrical signal that the differential pressure is in the normal range. For example, the control target temperature is set to 1 to 2 ° C. and the temperature detection electrical input from the temperature sensor 3 through the temperature signal line 31 is performed. Compared with the detection result of the temperature sensor 3 according to the signal, an opening degree control electric signal for setting the opening degree of the flow control valve 13 to a predetermined opening degree is output to the actuator 14 through the control signal line 51. Then, the actuator 14 controls the opening of the flow control valve 13 according to the input electric signal for opening control, that is, sets it to a predetermined opening.

  On the other hand, when the differential pressure upstream and downstream of the dehumidifying device 2 suddenly increases, the controller 5 determines from the differential pressure detection electrical signal from the differential pressure sensor 4 that it has deviated from the normal range of differential pressure. For example, the control target temperature is changed to 5 ° C., the opening degree control electrical signal for increasing the opening degree of the flow control valve 13 is output to the actuator 14, and the amount of warm air wa introduced into the cold air flow path 11. By increasing the temperature, the temperature of the conditioned air is quickly raised.

  On the other hand, even when the temperature at the outlet 1a of the air conditioner 1 suddenly decreases, the controller 5 may similarly set the control target temperature to 5 ° C.

  As described above, the air conditioning system S according to the present embodiment provides the actuator 14 with an electrical signal for opening control using the temperature detection electrical signal from the temperature sensor 3 and the differential pressure detection electrical signal from the differential pressure sensor 4. By directing the output, the temperature of the air introduced into the dehumidifying device 2 is controlled to 0 ° C. or higher.

  By adopting such a configuration, it becomes possible to perform precise control using the outputs of both the temperature sensor 3 and the differential pressure sensor 4 to control the flow rate control valve 13, and as a result, the temperature and differential pressure can be controlled. It is possible to perform stable temperature control even in a sudden change. Further, unlike the conventional ones as shown in FIGS. 2 and 3, it is not necessary to provide piping from the vicinity of the dehumidifying device 2 to the flow rate control valve 13 or the actuator 14, so that it is impossible to space due to the routing of the piping. It is possible to effectively improve problems such as weight increase. In particular, in the present embodiment, as a mode in which the control gain can be adjusted by changing the control target temperature in response to the case where the differential pressure sensor 4 and the temperature sensor 3 detect a sudden change, the overshoot is suppressed and harmonized. It is possible to quickly set the air to the actual target temperature.

  The present invention is not limited to the embodiment described in detail above.

  For example, a specific mode for calculating the electrical signal for opening control based on the temperature detection electrical signal from the temperature sensor and the differential pressure detection electrical signal from the differential pressure sensor, that is, the specific control mode of the actuator is limited to the above mode. For example, it is possible to apply various control methods from existing control methods.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

Explanatory drawing which shows the air conditioning system which concerns on one Embodiment of this invention. Explanatory drawing which shows the air conditioning system which concerns on a prior art example. Explanatory drawing which shows the air conditioning system which concerns on another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air conditioning apparatus 1a ... Outlet 2 ... Dehumidification apparatus 11 ... Cold air distribution path 12 ... Warm air distribution path 13 ... Flow control valve 14 ... Actuator 3 ... Temperature sensor 4 ... Differential pressure sensor 5 ... Controller S ... Air conditioning system ca ... Cold air wa ... Warm

Claims (1)

A dehumidifier is arranged on the outlet side of the air conditioner,
The air conditioner increases or decreases the cool air flow path for flowing the introduced cool air, the warm air flow path for mixing warm air into the cold air flow path, and the flow rate of warm air mixed from the warm air flow path into the cold air flow path. A flow control valve for opening and opening and closing the actuator according to the opening control electric signal sequentially input the opening of the flow control valve,
A temperature sensor that detects an air temperature on the outlet side of the air conditioner and upstream of the dehumidifier, and outputs the detection result as a temperature detection electrical signal;
A differential pressure sensor that detects a differential pressure before and after the dehumidifier and outputs a detection result as a differential pressure detection electrical signal;
The opening degree control electric signal is outputted to the actuator so as to control the temperature of the air introduced into the dehumidifying device to 0 ° C. or higher by using at least the temperature detection electric signal and the differential pressure detection electric signal. An air conditioning system comprising a control device.

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