逆变器是把直流电能转变成交流电。通俗的讲，逆变器是一种将直流电转化为交流电的装置。它由逆变桥、控制逻辑和滤波电路组成。广泛适用于空调、家庭影院、电动砂轮、电动工具、缝纫机、DVD、VCD、电脑、电视、洗衣机、抽油烟机、冰箱，录像机、按摩器、风扇、照明等。那么如何选择逆变器呢？小编今天就来为您介绍一下。
Inverter is to convert DC power into current power. Generally speaking, inverter is a device that converts direct current into alternating current. It is composed of inverter bridge, control logic and filter circuit. It is widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVDs, VCDs, computers, televisions, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting, etc. So how to choose the inverter? The editor will introduce it to you today.
1. Is it produced by a regular manufacturer
Formal products must have Chinese trademarks and manufacturers, and the manufacturer's address and telephone number are printed on the package. If there is no such product, it can be basically determined as "three no products". There are a lot of products in China, but they don't even have trademarks and manufacturers. They are also called imported products. Don't buy this kind of product. If there is a quality problem, you don't even know who to look for. Don't expect the seller to guarantee after-sales service for you.
2. Be sure to choose metal shell products
Due to the large power and heat of the on-board inverter, if the internal heat cannot be dissipated in time, the service life of the components will be affected, and the fire risk will be caused. The metal shell, on the one hand, has good heat dissipation characteristics, on the other hand, it will not burn. Do not use products with plastic shells. Even if a fan is added to help dissipate heat, the noise in use is increased, and the working life of the fan is generally relatively short, which reduces the reliability of the whole machine. In case of shutdown one day, the consequences will be serious.
3. We must choose split products, not integrated products
There are four disadvantages of the integrated type. Because the socket of the cigarette lighter is not very deep, the rear of the integrated type product is heavy, and the bumps in the driving process of the vehicle are easy to shake off the inverter or cause poor contact. Second, if the integrated inverter is inserted into the cigarette lighter socket, the rear part will be exposed for a long time, which will affect the shift operation of the right hand. This is closely related to driving safety, please pay attention. Third, because it is directly plugged into the cigarette lighter socket, the integrated inverter cannot be used in the rear row. Fourth, the integrated shell is made of plastic. Everyone knows that plastic is not resistant to high temperature. Therefore, the contact part between the integrated inverter and the cigarette lighter socket will generate high temperature through large current, which will lead to head deformation or melting, and serious fire. Therefore, no matter from the point of view of safety or convenience, the integrated inverter cannot be selected.
4. Whether various protection functions are complete
A good on-board inverter should have perfect protection functions, which can protect your car and power supply under all circumstances. It should also have an audible and visual alarm function to remind you to deal with various situations in a timely manner. Generally, the protection functions shall include input undervoltage, overvoltage protection, over-temperature protection, output overload and output short-circuit protection.
5. Conversion efficiency
This is a very important indicator of the inverter. The higher the inverter efficiency, the longer the battery life, and the smaller the inverter heat. Generally, it should reach more than 90%. However, this indicator cannot be tested by users, and can only be measured by the conscience of the manufacturer. The user can only make a simple judgment from the heat output of the inverter through the load with high power. A good inverter should be able to work for a long time without burning when loaded with 80% of the nominal power.
6. The cigarette lighter plug shall be made of bakelite, the plug wire shall be thick and the length shall be convenient for use
The bakelite cigarette lighter plug can work under high temperature without deformation and burning. There are few products on the market that do not use the bakelite cigarette lighter plug. Due to the safety of use, we should pay attention to it. The appearance of bakelite cigarette lighter plug is relatively bright, while the cigarette lighter plug made of plastic material looks darker and has no luster.
7. If the electrical power is greater than 160W, be sure to use the battery clamp to take power directly from the battery
Car cigarette lighter socket can only pass about 10A current, so high-power inverters must be equipped with another battery clamp line to directly power from the battery. In order to save costs, some manufacturers now have 300W products that are not equipped with battery clamp lines and claim to have passed CE certification. If you use this product, it may burn the car wiring, or cause fire. Please pay attention to it.
The above is the inverter purchasing skills introduced by Xiaobian. I believe you have a certain understanding of the inverter after reading it. I hope it can help you.
1、是否正规厂家生产
正规的产品，一定会有中文商标及生产厂家，并且包装上印有厂家地址及电话，如没有，则可以基本判定为三无产品。国内有不少产品，打一堆洋文，却连商标、生产厂家都没有，还美其名曰进口产品，这种产品别买，如果出了质量问题，连找谁都不知道，别指望销售商能给你保证售后服务。
2、一定要选用金属外壳产品
车载逆变器由于功率较大，发热亦大，如果内部热量不能及时散出，轻则影响元器件寿命，重则有产生火灾的危险。金属外壳，一方面具有良好的散热特性，另一方面也不会燃烧。塑胶外壳的产品，不要选用。即使加了风扇帮助散热，一是增加了使用中的噪音，二是风扇工作寿命一般都比较短，这样就降低了整机的可靠性，万一哪天停转了，后果可就严重了。
3、一定要选用分体式产品，不能选用一体式的产品
一体式的缺点有四个，、由于汽车点烟器插座不是很深，一体式产品后部较重，汽车行驶过程中的颠簸容易将逆变器抖掉或引起接触不良。第二、一体化逆变器插在点烟器插座上，后部露出较长，会影响右手的换档操作，这可是跟行车安全息息相关的，千万注意了。第三、由于直接插在点烟器插座上，一体式逆变器后排无法使用。第四、一体式外壳都是塑胶，大家都知道塑胶不耐高温，因此一体式逆变器跟点烟器插座接触部分通过大电流会产生高温，导致头部变形或熔化，严重还会引起火灾。因此无论从使用安全还是从使用方便性上来看，都不能选用一体式的逆变器。
4、各种保护功能是否完善
一台好的车载逆变器，应该具备完善的保护功能，在各种情况下均能保护您的爱车及电源。还应具有声光报警功能，提醒您对各种情况及时作出处理。一般应具有的保护功能为输入欠压、过压保护、过温保护、输出过载、输出短路保护。
5、转换效率
这是逆变器非常重要的一个指标，逆变效率越高，电瓶使用时间越久，逆变器发热越小。一般应达到90％以上。但这个指标用户没办法测试，只能靠厂家良心来标了。用户只能通过带大功率的负载，从逆变器的发热量来进行简单判别了。好的逆变器，应当在带标称功率80％的负载时能够长时间工作而不发烫。
6、点烟器插头应使用电木材质，插头线要粗，长度应方便使用
电木材质的点烟器插头能够在高温条件下工作而不变形，也不会燃烧，现在市面上产品不用电木材质点烟器插头的产品已经很少，由于有关使用安全，但还是应该注意一下。电木点烟器插头外观比较亮，而采用塑料材质的点烟器插头看上去就要黯淡一些，没有光泽。
7、电器功率大于160W，一定要用电瓶夹子直接从电瓶取电
汽车点烟器插座只能通过10A左右电流，所以大功率的逆变器都必须另配一条电瓶夹子线从电瓶直接取电。现在有一些厂家为了节约成本，300W的产品都不配电瓶夹子线，还号称通过了CE认证。使用这种产品，轻则烧坏汽车配线，重则引起火灾，请广大车主千万注意了。
以上就是小编为您介绍的逆变器选购技巧，相信您在看过之后对逆变器也有了一定的了解，希望能够为您带去帮助。