Revealed Six Secrets of Low-priced Central Air Conditioning Thermostats

Revealed Six Secrets of Low-priced Central Air Conditioning Thermostats

According to reports, with the upgrading of central air conditioners in large and medium-sized buildings in China and the rapid growth of household central air conditioners, the market "cake" of central air conditioners is attracting more and more attention. Taking New York as an example, more than 2,000 high-rise buildings have adopted central air-conditioning units. The rapid growth of central air-conditioning has driven the demand for thermostats to greatly increase.

　　 Central air-conditioning thermostats are mainly divided into three types: spiral thermostats, push-button thermostats, touch-screen thermostats

　　 Spiral thermostat: Using the difference in the expansion coefficient of the bimetallic material, in the process of temperature change, the compressive stress and tensile stress of the bimetallic material form a moment, and the result of the balance of internal and external moments makes the bimetallic bend and deform. Then through mechanical transmission, the electrical contacts are turned on and off to control the temperature. This is the most primitive thermostat, and the current market usage rate is very low.

　　 Push-button thermostat: By comparing the indoor temperature with the set temperature, it controls the fan coil and electric valve, electric ball valve or air valve at the end of the air conditioning system to achieve the purpose of regulating indoor temperature, comfort and energy saving.

Touch thermostat: integrated programmer and software to realize intelligent temperature control switch, can freely adjust the indoor temperature, and can set various time periods of switch according to user requirements and automatically run in various preset modes Adjust the room temperature; bring it to a comfortable temperature.

　　According to the introduction of professionals, low-cost and low-quality thermostats generally achieve the goal of reducing costs through the following six methods.

1. Choose inferior electronic components. The prices of different electronic components are far from each other and the quality is far from each other. For example, the FC220 series thermostat of Bonderui, the MCU chip used is a well-known brand packaged chip. The advantage of this chip It has strong anti-interference and long life. And some companies use bonding chips, which are easily damaged and have poor antistatic capabilities.

2. Use low-quality panel materials. Some large-scale and regular manufacturers use ABS materials that meet the national fire protection rating for thermostat panels, while many low-quality thermostats use ordinary plastics without fire-retardant materials as panels, and some even The manufacturer uses recycled electronic materials to reprocess them into thermostat panels.

　　3. Use low-quality LCD thermostat glass mirrors. The different viewing angles of the LCD thermostat glass mirrors will also cause a relatively large cost difference.

　　 Fourth, choose low-quality PCB boards. Generally, the PCB boards used in the market are single-sided straight PCBs. This kind of PCB boards are low in cost, low in strength, and short in life. Only a few manufacturers use double-sided PCBs.

5. To reduce costs in the production process, some small manufacturers use manual welding in order to reduce process costs. This method will cause unsaturation of the solder joints, prone to lack of solder, missed solder, and excessive solder, and the error rate is high. .

　　 Six. Reduce labor costs. Generally, low-cost and inferior thermostat manufacturers lack professional R&D personnel and after-sales personnel, and only rely on family workshop-style production for profit.