暖通空调系统是如何工作的?




September 21, 2015

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Your HVAC system is the core of heating and cooling within your home. If you get a high-quality system, you’re never going to feel uncomfortable at the height of summer or in the dead of winter. So how does one of these systems work?

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Heating and Cooling Distribution Systems

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It’s important to understand how different heating and cooling distribution systems work. This will help you to better understand your HVAC system.

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Forced Air Systems – The forced air system takes hot or cold air and forces it through metal ducts using a blower. Hot air is forced through one set of ducts and cold air is sent through another set of ducts, depending on whether you’re using the air conditioner or the furnace.
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The most common problem with forced air system is blowouts. Towards the end of their lifespan, the blowers can malfunction and stop working. It’s also not uncommon for cheaper systems to have issues with volume.

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Gravity Systems – Gravity systems operate using the principle that cold air sinks, while hot air rises. Therefore, a gravity system cannot be used in conjunction with an air conditioning system. These systems are positioned in the basement. When switched on, the warm air rises through the ceiling and heats your home. When it cools, it sinks down again and is reheated.
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Radiant Systems – Radiant systems also come with the same problem as gravity systems. They cannot be used in conjunction with air conditioning systems. A radiant heating system heats the floors, walls, or ceilings of a room. Most commonly, though, they’re used to heat implements like radiators, which distribute heat around your room. The main downside of radiant systems is the pipes used to transport hot water are prone to malfunction, either due to mineral deposits or general wear and tear.

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List of HVAC System Parts and How They Work

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It’s important to understand the various parts that make up the HVAC system, so you know how they work together. Despite various models having special features, the differences between their core components are comparatively few. There are four main parts to every HVAC system.
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  1. The furnace utilizes natural gas or oil to heat the air. Within the furnace is a heat exchanger, which is the part of the furnace responsible for heating up the air to the right temperature. You’ll typically find the furnace in the attic, basement, or a specially designed closet space.
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  3. The air conditioner cools the air and is found outside of the house. It uses electricity and coolant liquid to reduce the temperature of the air, while sending hot air outside and cold air inside.
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  5. Ductwork is the transit system for hot and cold air throughout the home. It moves it throughout the interior of your home.
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  7. The thermostat acts as the brain of your system. It can turn your system on and off, control the temperature and also operate any other special features that you have installed alongside your system.
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Controls for Heating and Cooling Systems

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The heart of your heating system is the thermostat. This is heat-sensitive and controls the temperature of your home. It also has the ability to respond to the current air temperature by itself.

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The set point is the temperature you set manually as your preferred temperature. If the thermostat notices it is above or below the set point, it will act accordingly, by turning the furnace on or off. The key component is the bimetallic element that contracts or expands when the temperature changes within your home.

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If you have an older thermostat, it will have two exposed contacts. When the room cools, the bimetallic element bends. It contacts electronically, before making a second contact. The system activates when the second contact bends, which launches the heating system.

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What about modern thermostats, though?

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They work differently because the contacts aren’t open to the elements. They’re held behind glass for protection. The contacts uncoil when the temperature drops. Using a series of magnets and a steel bar, the contacts close to complete the electrical circuit when the temperature drops too low.

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It works in the exact opposite way when the furnace needs to be switched off.

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Modern thermostats are far more accurate than their older counterparts. They’re also more durable because their electrical contacts are held behind glass.

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Conclusion

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Your HVAC system isn’t as complicated as you might think. It’s simply a combination of a furnace and air-conditioning system. Your thermostat is the brain that controls the way it works.

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If you’re thinking about installing a new system within your home, make sure you do your research first. Get quotes from multiple companies and make sure an expert visits your home to inspect the premises. The type of home and the layout of it will influence how much you pay for it.

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暖通空调系统是家中供暖和制冷的核心。如果你有一个高质量的系统,你永远不会在盛夏或严冬感到不舒服。那么这些系统是如何工作的呢?

供热和制冷分配系统

了解不同的加热和冷却分配系统是如何工作的是很重要的。这将帮助您更好地了解您的HVAC系统。

强制空气系统-强制空气系统利用鼓风机将冷热空气强制通过金属管道。热空气被迫通过一组管道,冷空气通过另一组管道,这取决于你使用的是空调还是炉子。

强制空气系统最常见的问题是井喷。在使用寿命即将结束时,鼓风机可能会出现故障并停止工作。对于便宜的系统来说,容量问题也并不少见。

重力系统-重力系统的工作原理是冷空气下沉,而热空气上升。因此,重力系统不能与空调系统结合使用。bob国际娱乐这些系统安装在地下室。打开电源后,暖空气从天花板上升,给你的家供暖。当它冷却时,它再次下沉并再次加热。

辐射系统-辐射系统和重力系统也有同样的问题。它们不能与空调系统一起使用。bob国际娱乐辐射供暖系统加热房间的地板、墙壁或天花板。不过,最常见的是,它们被用来加热散热器等设备,将热量分布在房间各处。辐射系统的主要缺点是用于输送热水的管道容易发生故障,要么是由于矿物质沉积,要么是由于一般的磨损。

暖通空调系统部件及其工作原理清单

了解组成暖通空调系统的各个部分是很重要的,这样你就知道它们是如何一起工作的。尽管各种型号都有各自的特点,但其核心部件之间的差异相对较小。每个暖通空调系统有四个主要部分。

  1. 炉子利用天然气或石油来加热空气。在炉子里面有一个热交换器,它是炉子的一部分,负责将空气加热到合适的温度。你通常会在阁楼、地下室或一个特别设计的壁橱空间里找到炉子。
  2. 空调是用来冷却空气的,安装在房子外面。它使用电力和冷却液来降低空气温度,同时将热空气送到外面,冷空气送到里面。
  3. 管道系统是家中冷热空气的运输系统。它在你的家中移动。
  4. 恒温器就像你系统的大脑一样。它可以打开和关闭你的系统,控制温度,还可以操作你安装在你的系统旁边的任何其他特殊功能。

加热和冷却系统的控制

恒温器是供暖系统的核心。这是热敏的,可以控制你家里的温度。它还能自己对当前的空气温度做出反应。

设定点是您手动设置为首选温度的温度。如果自动调温器注意到温度高于或低于设定值,它就会相应地采取行动,打开或关闭炉子。关键部件是双金属元素,当室内温度变化时,它会收缩或膨胀。

如果你有一个旧的恒温器,它会有两个暴露的触点。当房间冷却时,双金属元素弯曲。在进行第二次接触之前,它通过电子方式进行接触。当第二个触点弯曲时,系统启动,启动加热系统。

那么现代恒温器呢?

它们的工作方式不同,因为触点不对外开放。为了保护他们,他们被关在玻璃后面。当温度下降时,触点就会展开。使用一系列磁铁和一根钢筋,当温度降得过低时,触点闭合完成电路。

当需要关闭炉子时,它的工作方式正好相反。

现代恒温器比老式恒温器精确得多。它们也更耐用,因为它们的电触点是放在玻璃后面的。

结论

暖通空调系统并不像你想象的那么复杂。它只是一个简单的炉子和空调系统的组合。你的恒温器就是控制它工作方式的大脑。

如果你正考虑在家里安装一个新系统,一定要先做足功课。从多家公司获得报价,并确保有专家到你家检查房屋。房子的类型和布局会影响你为它支付多少钱。

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