推荐新闻
联系我们
来源：http://www.cx-fire.com/ 日期：2026-04-20
暖通设计中防火与排烟的阀门种类繁杂，应用场合不同时，阀门设置也不尽相同。可谓：都是防火，阀阀不同；位置不同，功能有别；有问有答，为你解惑！
The types of fire and smoke exhaust valves in HVAC design are diverse, and the valve settings vary depending on the application scenarios. It can be said that they are all fireproof, but the valves are different; Different positions result in different functions; There are questions and answers to help you clarify your doubts!
从规范出发，GB15930-2007《建筑通风和排烟系统用防火阀门》仅规定的三种阀门：防火阀（FHF），排烟防火阀（PFHF），排烟阀（PYF），当然此标准的定义和符号分类标记均为非强制性条文，也就是说，可以出现以上三种阀门之外的其他阀门类型。看规范——术语和定义：下判术语和定义适用于本标准。防火阀fire damper安装在通风、空气调节系统的送、回风管道上,平时呈开启状态,大灾时当管道内烟气温度达到70℃时关闭,并在一定时间内能满足漏烟量和耐火完整性要求,起隔烟阻大作用的阀门.防火阀一般由阀体,叶片、执行机构和温感器等部件组成，排烟防火阀fire damper in smoke-venting system安装在机械排烟系统的管道上,平时呈开启状态,火灾时当排烟管道内烟气温度达到280℃时关闭,并在一定时间内能满足漏烟量和耐火完整性要求,起隔烟阻火作用的阀门。排烟防火阀一般由阀体、叶片,执行机构和温感器等部件组成，绯烟阀smoke damper安装在机械排烟系统各支管端部(烟气吸入口)处,平时呈关闭状态并满足漏风量要求,大灾或需要排烟时手动和电动打开,起排烟作用的阀门，带有装饰口或进行过装饰处理的阀门称为排烟口，排烟阀一般由阀体、叶片、执行机构等部件组成。
Starting from the standard, GB15930-2007 "Fire Valves for Building Ventilation and Smoke Exhaust Systems" only specifies three types of valves: fire dampers (FHF), smoke exhaust fire dampers (PFHF), and smoke exhaust dampers (PYF). Of course, the definition and symbol classification marks of this standard are non mandatory provisions, which means that other types of valves besides the above three types of valves can appear. Refer to the specifications - terms and definitions: It is determined that the terms and definitions are applicable to this standard. Fire dampers are installed on the supply and return air ducts of ventilation and air conditioning systems. They are usually in an open state and close when the temperature of the smoke in the ducts reaches 70 ℃ during a major disaster. They can meet the requirements of smoke leakage and fire resistance integrity within a certain period of time and play a role in smoke isolation and resistance Fire dampers are generally composed of valve bodies, blades, actuators, temperature sensors, and other components. Smoke exhaust fire dampers are installed on the pipes of mechanical smoke exhaust systems and are usually in an open state. When the smoke temperature in the smoke exhaust pipe reaches 280 ℃ during a fire, they close and can meet the requirements of smoke leakage and fire resistance integrity within a certain period of time, serving as a valve for smoke isolation and fire resistance. Smoke exhaust fire dampers are generally composed of valve bodies, blades, actuators, and temperature sensors. Smoke dampers are installed at the end of each branch pipe (smoke inlet) of mechanical smoke exhaust systems, and are usually in a closed state to meet the requirements of air leakage. In case of major disasters or when smoke exhaust is needed, they can be manually or electrically opened to function as smoke exhaust valves. Valves with decorative openings or those that have been decorated are called smoke exhaust outlets. Smoke exhaust valves are generally composed of valve bodies, blades, actuators, and other components.
从定义可以看出，防火阀（FHF）均为70℃常开，排烟防火阀均为280℃常开，排烟阀（这里相当于排烟口）均为常闭。
From the definition, it can be seen that the fire dampers (FHF) are all normally open at 70 ℃, the smoke exhaust fire dampers are all normally open at 280 ℃, and the smoke exhaust dampers (equivalent to smoke outlets) are all normally closed.
问题1：是否存在70℃常闭的防火阀？
Question 1: Is there a fire damper that is normally closed at 70 ℃?
应该存在DFHF（B70℃），即70℃常闭电控防火阀，平时常闭，可以电控开启，手动、电动复位，70℃时熔断关闭，应用于平时不需要排风的气体消防房间（如做了空调的档案库）。
There should be DFHF (B70 ℃), which refers to a 70 ℃ normally closed electrically controlled fire damper. It is normally closed, can be electrically controlled to open, manually or electrically reset, and can be blown off at 70 ℃. It is used in gas fire rooms that do not require ventilation (such as archives with air conditioning).
问题2：是否存在280℃常闭的排烟防火阀？
Question 2: Is there a smoke exhaust fire damper that is normally closed at 280 ℃?
个人认为不存在280℃常闭的排烟防火阀，从定义中可以看出，排烟防火阀主要是排烟实用，280℃熔断关闭进行防火作用。既然排烟时需要使用，则做成常开的更可靠，可以避免常闭阀门在火灾发生时发生故障无法开启的情况。
I personally believe that there is no smoke exhaust fire damper that is normally closed at 280 ℃. From the definition, it can be seen that smoke exhaust fire dampers are mainly used for smoke exhaust and have a fireproof effect by melting and closing at 280 ℃. Since it is necessary to use it for smoke exhaust, making it normally open is more reliable and can avoid situations where normally closed valves fail to open in the event of a fire.
如果是排风兼排烟系统中平时不排风，仅火灾时需要排烟的风管，使用常闭的排烟阀/排烟口+常开280℃排烟防火阀即可。（如果排烟口自带280摄氏度熔断，可以不使用常开280℃PFHF？）
If it is a ventilation and smoke exhaust system that does not usually exhaust and only needs to exhaust smoke during a fire, a normally closed smoke exhaust valve/smoke outlet+a normally open 280 ℃ smoke exhaust fire damper can be used. If the exhaust outlet is equipped with a 280 ℃ fuse, can the normally open 280 ℃ PFHF be used instead? ）
有一种“自动排烟防火阀”，为平时常闭，发生火灾时开启，这与排烟阀的动作相似，但是排烟阀一般不具有208摄氏度熔断的防火功能，而自动排烟防火阀可以在280℃熔断关闭。该阀应设置在排烟系统的管道上或安装在排烟风机的吸入口处。
There is a type of "automatic smoke exhaust fire damper" that is normally closed and opens in the event of a fire, similar to the action of a smoke exhaust damper. However, smoke exhaust dampers generally do not have the fire prevention function of melting at 208 degrees Celsius, while automatic smoke exhaust fire dampers can melt and close at 280 degrees Celsius. The valve should be installed on the pipeline of the smoke exhaust system or at the suction inlet of the smoke exhaust fan.
这里的“自动排烟防火阀”可以用常闭的排烟阀/排烟口+常开280℃排烟防火阀替代，这时发生火灾排烟口开启并连锁风机启动即可。若安装在风机吸入口与排烟管道末端，发生火灾时需要连锁开动全部的“自动排烟防火阀”，且需要连锁启动风机，控制更为复杂，中间有一个开启失败则系统不能正常运行，可靠性不如常闭的排烟阀/排烟口+常开280℃排烟防火阀。
The 'automatic smoke exhaust fire damper' here can be replaced by a normally closed smoke exhaust valve/smoke exhaust outlet+a normally open 280 ℃ smoke exhaust fire damper. In the event of a fire, the smoke exhaust outlet will open and the fan will be interlocked to start. If installed at the suction port of the fan and the end of the smoke exhaust duct, in the event of a fire, all "automatic smoke exhaust fire dampers" need to be interlocked and the fan needs to be interlocked to start, making the control more complex. If one of them fails to open in the middle, the system cannot operate normally, and its reliability is not as good as that of normally closed smoke exhaust valves/smoke exhaust ports+normally open 280 ℃ smoke exhaust fire dampers.
问题3：排烟阀是否存在常开？
Question 3: Is the smoke exhaust valve normally open?
这里的排烟阀也就相当于排烟口，对于常见的板式排烟口与多叶排烟口，市场上常见的均为常闭形式，一般不需要常开的排烟口。对于排风兼排烟系统的排烟口，可以采用“单层百叶+280℃电控排烟防火阀”进行控制。
The smoke exhaust valve here is also equivalent to a smoke exhaust outlet. For common plate smoke exhaust outlets and multi blade smoke exhaust outlets, the commonly used ones in the market are normally closed and generally do not require normally open smoke exhaust outlets. For the smoke exhaust outlet of the exhaust and smoke exhaust system, a "single-layer louver+280 ℃ electrically controlled smoke exhaust fire damper" can be used for control.
问题4：70℃防火阀的应用场合有哪些？
Question 4: What are the application scenarios of 70 ℃ fire dampers?
防火阀应用场合很多，在空调送回风干管，通风风机进出口，风井入口，管道穿越防火分区/变形缝/重要房间/机房/火灾危险性大的房间的隔墙或楼板，垂直风管与每层水平风管连接处。等很多场合都需要设置防火阀。
Fire dampers are widely used in various applications, such as air conditioning return air ducts, ventilation fan inlets and outlets, air shaft inlets, pipelines passing through fire compartments/deformation joints/important rooms/machine rooms/walls or floors of rooms with high fire hazards, and vertical air ducts connecting to horizontal air ducts on each floor. Fire dampers need to be installed in many situations.
问题5：对于没有空调机房的空调，如新风换气机，吸顶式空调器等，防火阀如何设置？
Question 5: How to set the fire damper for air conditioners without air conditioning rooms, such as fresh air ventilators, ceiling mounted air conditioners, etc?
此时，并不必须设置防火阀、在回风管上设置防火阀、送回风均设置防火阀。个人认为如果发生火灾，可由消防控制室直接关停空调，不需要设置防火阀。如果没有控制中心，可以在回风管道上设置防火阀并连锁空调主机，回风温度70℃时熔断关闭并关闭空调主机。在送风管道上设置防火阀起不到作用，因为风先通过回风管进入空调，在回风管上设置防火阀就可以满足要求。
At this point, it is not necessary to install fire dampers, install fire dampers on the return air duct, and install fire dampers on both the return and return air. In my opinion, if a fire occurs, the air conditioning can be directly shut down from the fire control room without the need for fire dampers. If there is no control center, a fire damper can be installed on the return air duct and the air conditioning unit can be interlocked. When the return air temperature reaches 70 ℃, the air conditioning unit will be blown off and turned off. Installing a fire damper on the air supply duct does not work because the air enters the air conditioner through the return duct first, and installing a fire damper on the return duct can meet the requirements.
问题6：送回风主干管的防火阀是否要连锁空调主机？
Question 6: Should the fire damper of the return air main pipe be interlocked with the air conditioning unit?
个人认为需要连锁空调主机（如果可以实现）。
I personally think it is necessary to chain air conditioning units (if possible).
问题7：空调新风取风管是否需要安装防火阀？
Question 7: Does the air conditioning fresh air intake duct need to be equipped with a fire damper?
一般来说不需要。特别是如果回风，送风均安装防火阀之后，新风取风口就没有必要在安装防火阀了。并且一般取风口位于室外，且按照规范要求与排烟口保持10m以上的水平距离或3m以上的垂直距离（排烟口在上），一般烟气不会从新风口进入空调，所以一般不需要安装防火阀。
Generally speaking, it is not necessary. Especially if fire dampers are installed for both return and supply air, there is no need to install fire dampers at the fresh air intake. And generally, the air intake is located outdoors and maintains a horizontal distance of at least 10 meters or a vertical distance of at least 3 meters from the exhaust outlet (with the exhaust outlet above) according to regulatory requirements. Generally, smoke will not enter the air conditioner from the new air intake, so it is not necessary to install a fire damper.
问题8：空调风管连接到风井时，如果没有穿越防火分区，且风井仅带这一根风管，可以不用安装防火阀？
Question 8: When connecting the air conditioning duct to the air shaft, if it does not pass through the fire compartment and the air shaft only has this one duct, can a fire damper be installed?
空调风管连接至风井时，如果没有穿越防火分区，且风井带有二根或二根以上的风管（即多个系统公用风井），需要在风管连接风井处安装70℃常开防火阀，并且在防火阀后需设置止回阀。如果风管穿越防火分区，则一定要加防火阀。
When the air conditioning duct is connected to the air shaft, if it does not pass through the fire compartment and the air shaft has two or more ducts (i.e. multiple system common air shafts), a 70 ℃ normally open fire damper needs to be installed at the connection of the duct to the air shaft, and a check valve needs to be installed after the fire damper. If the air duct passes through a fire compartment, a fire damper must be added.
问题9：防火阀设置在哪一侧？
Question 9: On which side is the fire damper set?
防火阀应该设置在与空气流动方向相同的一侧，即如果是送风管，防火阀应该设置在还未穿墙的一侧。穿越变形缝两侧均应该设置防火阀。如果需要安装防火阀的一侧没有空间或者不便于安装时可以根据施工要求改到另一侧？
The fire damper should be set on the same side as the direction of air flow, that is, if it is a supply duct, the fire damper should be set on the side that has not yet penetrated the wall. Fire dampers should be installed on both sides of the deformation joint. If there is no space or it is inconvenient to install the fire damper on one side, can it be changed to the other side according to construction requirements?
问题10：如果风机出口直接开百叶通往室外，则风机出口侧需要安装防火阀？
Question 10: If the outlet of the fan is directly connected to the outside through louvers, then a fire damper needs to be installed on the outlet side of the fan?
对于风机房内的风机，出口直接开百叶通往室外，此处风机出口可以不设防火阀。如果安装70℃常开防火阀且连锁风机当然可以，但是此时若风机房着火且烧穿风管，此阀门才会作用，且风机出口直接经百叶通往室外，此阀门作用基本不大。如果风机出口的管道需要穿越重要房间/易着火房间/防火分区等位置之后才通往室外，则在风机房内排风风机出口侧也需要设置70℃防火阀。
For the fans in the fan room, the outlet is directly connected to the outside through louvers, and there is no need to install fire dampers at the fan outlet. If a 70 ℃ normally open fire damper is installed and the interlocking fan is installed, of course, it is possible. However, if the fan room catches fire and burns through the air duct, this valve will only work, and the fan outlet will directly lead to the outside through the louver, so this valve has little effect. If the pipeline at the outlet of the fan needs to pass through important rooms/flammable rooms/fire compartments before reaching the outside, a 70 ℃ fire damper should also be installed on the outlet side of the exhaust fan in the fan room.
问题11：该出口侧阀门是否需要与风机连锁？
Question 11: Does the outlet side valve need to be interlocked with the fan?
正常来说，该阀门与风机连锁更为保险，也就是在风机房发生火灾时，放置烟气蔓延到其他区域，可以连锁关停风机。对于风机房内的送风风机：在风机出口靠墙一侧（200mm以内）设置70℃常开防火阀，并连锁风机关闭。如果风机入口直接通往室外百叶，则风机入口不需要设置防火阀。如果风机入口的管道需要穿越重要房间/易着火房间/防火分区等位置之后才通往室外，则在风机房内送风风机入口侧也需要设置70℃防火阀，该阀门最好能连锁风机关闭（见问题10）。
Normally, the valve is more secure when interlocked with the fan, which means that in the event of a fire in the fan room, if smoke spreads to other areas, the fan can be interlocked and shut down. For the supply fans in the fan room: Install a 70 ℃ normally open fire damper on the side of the fan outlet near the wall (within 200mm), and interlock the fan to close. If the fan inlet leads directly to the outdoor louver, there is no need to install a fire damper at the fan inlet. If the pipeline at the inlet of the fan needs to pass through important rooms/fire prone rooms/fire zones before reaching the outside, a 70 ℃ fire damper should also be installed on the inlet side of the supply fan in the fan room. It is recommended that this valve can interlock the closure of the fan (see question 10).
问题12：风机不在风机房内的情况下，风机进出口的防火阀如何设置？
Question 12: How to set the fire damper at the inlet and outlet of the fan when the fan is not in the fan room?
与问题五类似，认为需要在排风机的入口/送风机的出口设置70℃常开防火阀且连锁风机关闭即可，不需要两端都设。
Similar to question five, it is believed that a 70 ℃ normally open fire damper should be installed at the inlet of the exhaust fan/outlet of the supply fan, and the interlocking fan should be closed, without the need for both ends.
问题13：风机房内排烟兼排风风机的出口如果直接开百叶通往室外，可不设置阀门？
Question 13: If the outlet of the smoke exhaust and exhaust fan in the fan room is directly opened with louvers to the outside, can a valve be omitted?
风机房内排烟兼排风风机的出口如果穿墙/其他房间，然后通往室外，需要在出口侧靠墙处设置280℃常开排烟防火阀并连锁风机关闭。
If the outlet of the smoke exhaust and exhaust fan in the fan room passes through a wall/other room and leads to the outside, a 280 ℃ normally open smoke exhaust fire damper needs to be installed near the wall on the outlet side and the fan needs to be interlocked to close.
如果没有风机房，排烟风机出口可以不设排烟防火阀（入口要安装280℃常开排烟防火阀且连锁风机关闭）。
If there is no fan room, the exhaust fan outlet does not need to be equipped with an exhaust fire damper (the inlet should be equipped with a 280 ℃ normally open exhaust fire damper and the interlocking fan should be closed).
如果风机出口通往风井，且该风井仅仅带此一个系统，可以不设排烟防火阀。（如果穿越了防火分区，一定要设排烟防火阀）
If the fan outlet leads to the air shaft and the air shaft only has this one system, smoke exhaust fire dampers can be omitted. If passing through a fire compartment, it is necessary to install smoke exhaust fire dampers
如果风机出口通往风井，该风井带2个或2个以上的系统，则每个系统风机出口靠风井处（200mm以内）设280℃常开排烟防火阀且连锁风机关闭，且后面设止回阀。
If the fan outlet leads to the air shaft with 2 or more systems, a 280 ℃ normally open smoke exhaust fire damper shall be installed at the fan outlet of each system (within 200mm) near the air shaft, and the interlocking fan shall be closed, with a check valve installed at the back.
本文由 川消 友情奉献.更多有关的知识请点击 http://www.cx-fire.com/ 真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.
This article is dedicated by Chuanxiao Friendship For more related knowledge, please click http://www.cx-fire.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.
