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[21空调] B737NG空调系统里的那些“传感器”汇总

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发表于 2019-7-22 21:33:37 | 显示全部楼层 |阅读模式 来自: 中国北京

SENSOR(用于控制)

(1)区域温度控制系统里的 Temperature sensors:用于控制各种活门的开度等,从而控制区域温度

(2)设备冷却系统里的Low flow sensors监控管道里的冷却流量情况,低流量时,给驾驶舱提供警告信号

(3)增压控制A sensor on each CPC senses pressure in the cabin.

(4)冲压空气系统: 110C 温度控制
The ram air control temperature sensor supplies temperature data to the ram air controller.
The ram air sensor is in the air conditioning compartment. It is in the duct that connects the compressor section of the ACM to the secondary heat exchanger.

The controller does not send control signals when the temperature is approximately 230F (110C).

(5)某些机型low limit 35F temperature sensor
The low limit (35F) temperature sensor sends temperature information to the low limit (35F) controller.

The low limit (35F) components monitor and adjust the temperature in the water separator to prevent water freezing conditions.

在34F-36F之间不发出控制信号。

(6)冷却系统
The mix manifold temperature sensors and pack discharge overheat
switches are in the distribution compartment.

(7)流量控制关断活门:流量传感器和组件入口压力传感器
Pack Valve Modulation
The pack valve flow is modulated by varying the current flow to the torque motor in the valve. Signals sent from a flow sensor and the pack inlet pressure sensor to the pack flow temperature controller are used to determine the amperage sent to the torque motor.


(8)组件内部的在加热器
These pack bulbs are on the reheater:
• Pack temperature sensor
• Pack temperature bulb.


(9)组件温度传感器
Each pack temperature sensor has two sense elements. One element gives pack temperature feedback to the auto (normal) control of its related pack/zone temperature controller. The other element gives pack temperature feedback to the standby control of the opposite pack/zone temperature controller.

每个组件温度传感器有这两个元件。其中一个把温度信号给对应ZTC的自动(正常)控制,另一个给另一侧ZTC的备用控制。

(10)组件进口压力传感器(PIPS)
The function of the pack inlet pressure sensor (PIPS) is to sense bleed pressure downstream of the flow control and shutoff valve and upstream of the inlet to the pack primary heat exchanger. The pressure data is sent to the pack flow temperature control for pressure and flow control.

感受流量控制关断活门的下游引气压力,以及组件初级热交换器进口的上游引气压力。

(11)流量传感器
For normal flow control, the duct ambient temperature element reading and the pressure reading from the pack inlet pressure sensor are used to determine the volumetric flow rate of air flowing into the pack.

正常流量控制中,管道大气温度元件读数、来自PIPS的压力读数,用于决定流入组件的气流的体积流量速率。

(12)混合总管温度传感器
The mix manifold temperature sensors measure the temperature in the mix manifold of the air conditioning system. They give feedback to the pack/zone temperature controllers.

混合总管传感器,信号给P/ZTC

(13)客舱温度传感器组件 & 驾驶舱温度传感器组件
These components are part of the cabin temperature sensor assembly:
• Temperature sensor
• Inlet grille
• Air filter
• Temperature sensor fan.

组件包含:温度传感器、进口格栅、空气滤子、温度传感器风扇

The flight compartment temperature sensor fan comes on when 115v ac is available and the left pack switch is in AUTO or HIGH.
The passenger compartment temperature sensor fan comes on when 115v ac is available.

驾驶舱温度传感器风扇:115V AC 且 左组件AUTO或者HIGH
客舱温度传感器风扇:115V AC

The cabin temperature sensor elements send the air temperature to the pack/zone temperature controllers. The pack/zone temperature controllers use this data to compare with the cabin temperature selectors.

元件把信号给ZTC,ZTC比较这个信号和温度选择器的位置,差值用于控制各种活门。

(14)管道温度预感传感器
The duct temperature anticipator sensor supplies the cabin temperature controller (CTC) with rate of temperature change (increase or decrease).


(15)管道温度极限传感器:60℃或以上时给出信号
The duct temperature limit sensor supplies a signal to the cabin temperature controller (CTC) when the duct temperature is 140F (60C) or more.


(16)温度控制的自动控制逻辑
Automatic Control
When the pack switch is in the AUTO or HIGH position, 115v ac goes to the cabin temperature selector. When the cabin temperature selector is in the AUTO position, power goes to the cabin temperature controller (CTC). The cabin temperature selector sets a resistance the CTC compares to the air temperature. The CTC monitors air temperatures from these sensors:

• Cabin temperature sensor
• Duct temperature anticipator sensor
• Duct temperature limit sensor.

The CTC compares the cabin temperature selector with the cabin temperature sensor and duct temperature anticipator sensor. The result is a heat or cool error signal. If the error is more than 0.9F (0.5C), a heat or cool signal goes to the air mix valve.

The duct temperature limit sensor provides a signal to the CTC. When the duct temperature increases to 140F (60C), the CTC disconnects the heat signal and sends a cool signal to the air mix valve. If the temperature decreases to less than 140F (60C), the air mix valve receives a heat or cool signal.


(17)管道温度传感器
The duct temperature sensor sends the duct temperature to the pack flow temperature controller. The pack flow temperature controller uses this data to compare with a cabin temperature selector and cabin temperature sensor.
信号给ZTC,与客舱温度选择器、客舱温度传感器对比,差值用于控制。


BULB(用于指示)

Purpose
The temperature bulbs measure temperature in the critical areas of the air conditioning system. The temperature bulbs are for indication only and are not part of the automatic temperature control system.

Physical Description
The temperature bulb has these parts:
• Sensing element
• Electrical connector.

Location
There are seven temperature bulbs in the system. They are similar in design and operation. There are temperature bulbs in these locations:
The flight compartment air conditioning duct in the EE compartment on the left hand side next to the E2 rack
The forward passenger cabin air conditioning supply duct in the overhead, forward of the left hand forward riser
The aft passenger cabin air conditioning supply duct in the overhead, aft of the right hand aft riser
The forward passenger cabin forward right side of the passenger cabin bullnose area
The aft passenger cabin aft right side of the passenger cabin bullnose area
The right air conditioning pack on the right high pressure water separator assembly
The left air conditioning pack on the left high pressure water separator assembly.

Training Information Point
Handle the temperature bulbs gently. Use approved cleaning materials to clean the temperature bulbs.


SWITCH(用于保护性关断)

(1)设备冷却系统,风扇内部,过热保护
The fans are single-stage fans with an integral induction motor. They each have a check valve and install as a unit. The fans have thermal switches that protect the fans from overheat damage.

(2)增压控制
座舱高度警告电门

(3)补充加热

Door Area Heaters
The door area heaters use phase-to-phase power. Each heat element uses 325 watts. There are internal temperature control components that keep the temperature to a limit. The overheat switch opens at 230°F (110°C) and closes at 200°F (93°C). The thermal fuse opens at 300°F (148°C).

Overwing Emergency Exit Door Heaters
The overwing emergency exit doors are heated with heaters behind the lining, door trim, and close out panels.
The close out panel heater uses 10 watts. An overheat switch keeps the temperature to a limit. The overheat switch opens at 100°F (38°C) and closes at 80°F (27°C).
The door lining and trim heaters use 50 watts. There are internal temperature control components that keep the temperature to a limit. The temperature control switch opens at 80F (27C) and closes at 70F (21C).
The overheat switch opens at 95°F (35°C) and closes at 50°F (10°C).


(4)冷却系统
- 压缩机出口过热 390 (199C)
- 涡轮进口过热 210F(99C)
- 组件出口管道过热 250F(121C)

(5)温度控制
- 区域管道过热 190F(88C)

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发表于 2019-7-23 09:35:20 来自手机 | 显示全部楼层 来自: 中国
很不错,收藏了!多谢楼主总结分享出来
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