341F SOLENOID THERMOSTAT

一、名称

SOLENOID THERMOSTAT

电磁恒温器

二、件号

341F010000,341F020000

三、章节号

36-11-10

四、适用机型

A319/A320

五、系统

36-PNEUMATIC

气源

六、安装位置

发动机吊架

七、部件原理

Operation (Fig FUNC-3)

操作

A. General Operation

基本操作

The solenoid thermostat monitors the differential pressure between the upstream side of the Pressure Regulating Valve and the downstream side of the precooler.

电磁阀式恒温器监测PRV上游侧与预冷器下游侧之间的压差。

It controls pneumatically the air supply through the bleed air system by the closing of the Pressure Regulating Valve.

通过关闭PRV，用气动方式控制通过引气系统的空气供给。

B. Detailed Operation

详细操作

(1) Non-Return Function

反流抑制功能

When the differential pressure sensed by the Diaphragm Assy (between the downstream side of the precooler and the upstream side of the Pressure Regulating Valve) decreases below a specified value. The Diaphragm Assy, moved by a spring, prevent an opposite flow which may cause a sudden increase in the pressure downstream of the bleed air system.

当膜片组件（预冷器下游侧与PRV上游侧之间的）检测到的压差降低至低于指定值时，由弹簧驱动的膜片组件将阻止可能引起引气系统下游压力突然升高的逆向流动。

The air pressure is thus supplied into the solenoid chamber and moves up the core. The clapper under the spring load moves off its seat and causes the air vent of the pressure in the coupling line which induces the closing of Pressure Regulating Valve.

这样，空气压力被输送到电磁阀腔室并使铁芯向上移动。在弹簧载荷作用下，阀芯离开其阀座，从而排放耦合管路中的压力，进而引起PRV关闭。

When the upstream pressure is too high, the Relief Valve decreases the upstream pressure of the Diaphragm Assy to prevent its damage.

当上游压力过高时，泄压阀会降低膜片组件的上游压力，以防止其损坏。

(2) Electrical Closing Function

电气关闭功能

When the coil of solenoid Assy is energized through the electrical connector, the core moves up and, with the spring load, the clapper move off its seat. This vents the coupling line. This causes the closing of the Pressure Regulating Valve.

当通过电气连接器对恒温器组件电磁线圈通电时，铁芯向上移动，在弹簧载荷下，使阀芯离开阀座。这将排放耦合管路压力。这将导致PRV关闭。

八、工作参数

九、在飞机系统中的工作原理及互联

与341E同功能，飞机适用性代码不一样

Bleed Pressure Regulator Valve Control Solenoid

引气压力调节活门控制电磁阀

Function(Ref. Fig. 024A)

功能（参考图024A）

(a) General operation.

The bleed pressure regulator valve control solenoid continuously senses the temperature of the air from the bleed air precooler exchanger of the bleed air system. It also monitors the differential pressure between the upstream side of the bleed pressure regulator valve and the downstream side of the bleed air precooler exchanger.

It controls pneumatically the air supply through the bleed air system by closing the bleed pressure regulator valve.

(a)基本操作。

PRV控制电磁阀持续监测引气系统中预冷器换热器的空气温度，并实时监控PRV上游侧与预冷器下游侧之间的压差。它通过关闭PRV来气动控制通过引气系统的供气。

(b) Electrical closing function.

When the coil of the solenoid sub-assembly is energized, the core moves up and the clapper moves off its seat, under the spring load. This vents the coupling line and causes closure of the bleed pressure regulator valve.

NOTE : The bleed pressure regulator valve control solenoid has no direct effect on the HP bleed valve operation. The HP bleed valve also closes because the bleed pressure regulator valve closure vents to ambient the signal pressure in the sense line between the bleed pressure regulator valve and the HP bleed valve.

电气闭合功能。

当电磁阀组件的线圈通电时，铁芯随之上移，弹簧作用下使阀芯脱离阀座。此动作会释放耦合管路压力，从而触发PRV的关闭。

注：PRV控制电磁阀不会直接影响HPV的工作状态。HPV之所以关闭，是因为PRV的关闭动作会将信号压力从PRV与HPV之间的感应管路中排出至环境。