Air conditioning is one of the most common equipment in life to adjust the temperature difference between indoor and outdoor, generally driven by electricity. The nature of thermal power is carbon emissions, so energy-saving products emerge at the right moment, among which floor heating with heat source water is the most direct effect and widely used. Air conditioning with its can be in a short time of rapid refrigeration or heating, favored by the majority of users, but it has more energy consumption, occupying area, difficult maintenance and other shortcomings. Floor heating has many advantages, such as health care function, comfortable health, economic energy saving, good thermal stability and long service life, but it also has the most direct disadvantages, the heating speed is slow, can not make the room quickly heat up in a short time. Based on the advantages and disadvantages of air conditioning and floor heating, China's thermostat manufacturers, represented by E-TOP, designed a dual-use temperature controller of air conditioning and floor heating, which has made relative optimization in temperature regulation and energy saving. The thermostat has undergone three updates, the first generation is electrical, the second generation is electronic, and the third generation is intelligent. The so-called intelligent temperature controller is the application of new control model and NUMERICAL control chip. E-top adopts HI67F489 as the main control chip, and customized a special code breaking screen for supporting use. Through software programming, the operation of the temperature controller is more simple and convenient, which is convenient for users to operate better. However, the power consumption of the central air-conditioning system in high-grade buildings generally accounts for 40% to 60% of the total power consumption of the entire building. For the consideration of energy saving of air conditioning system, it is very important to design scientific and reasonable temperature controller and temperature control algorithm. In winter, the number of people using air conditioning is much higher than that using floor heating. However, under the same circumstances, the power consumption of geothermal floor heating is less than that of air conditioning. At present, or use air conditioning to undertake temperature regulation entirely, or air conditioning and floor warming are to undertake the job separately, dual-use temperature controller still did not use commonly on the market.   1 Function Description At present, the temperature controller launched by E-TOP integrates air conditioning and floor heating temperature control, with a total of 5 working modes, including air conditioning cooling mode, air conditioning heating mode, floor heating mode, air conditioning combined heating mode and sleep mode. These five modes meet the needs of different seasons, while also considering a series of practical issues such as power consumption and power saving. There are multiple electric routes between the central air conditioner and the temperature controller. For the convenience of installation and simple wiring, the connection between the temperature controller and the fan is cancelled, and 315 wireless communication is used to control the high, medium and low wind speed. We use a five-stop valve to control the flow of hot and cold water, by changing the size of the gear to achieve temperature control requirements. Dual-use temperature controller has a wide application prospect in hot spring clubs, hotels and other places.   2 Hardware Design We design the relevant circuit for the main control chip based on HT67F489 chip of Hetai. This temperature controller is divided into two circuit boards, one is the power supply circuit board and the other is the temperature control panel. Among them, the main function of the power supply circuit board is to convert the voltage of 230V to 3.3V, and the voltage of 3.3V is used to power the temperature control panel. In the power supply circuit, we use LN5RO4D chip. LN5RO4D is a standard PwM controller integrated circuit, which can be easily applied to various low-power power adapters. It has few peripheral devices and a variety of internal protection circuits, which are simple. A transformer was used to convert 20V to 12V, followed by an AMS1117 high efficiency linear regulator, which stabilized the output voltage to 3.3V. The temperature control panel consists of the main control chip H67F489, code break screen, temperature sensor, 315 wireless communication module, etc., which is an important part of the function of the temperature controller. The main component of the temperature sensor is thermistor, the use of negative temperature coefficient thermistor, that is, the resistance value decreases when the temperature rises. The code breaking screen for the air conditioner and floor heating thermostat is specially customized. A total of 20 pins are designed to display 122 picture blocks, each picture block can be displayed separately, and the content displayed at the same time is simple and clear.   3 Software Design The program is the soul of the thermostat, is an important basis for the thermostat to achieve various functions. Thermostat is the most important key procedure, namely press different keys to achieve the corresponding function, from left to right are the key mode of power supply selection key, timing open timing off trigger key, wind speed selection key, increment key, decrement key. The corresponding parameters and contents can be displayed on the screen only after the coding screen is programmed accordingly. The room temperature display is realized by AD conversion program. Through the timing program to achieve the function of timing on or off; Through 315 wireless communication program to control the wind speed of the fan; Through the serial port command to control the gear of the five-grade valve, so as to control the flow, to achieve the role of temperature regulation. Therefore, software design is very important in dual - use temperature controller   4 Energy consumption In summer, directly choose air conditioning refrigeration mode, so that the indoor temperature reaches the set value, and ordinary central air conditioning has no difference. In winter, the combined heating mode of air conditioning and floor heating can be selected. When the indoor temperature reaches 25℃, the mode of floor heating can be changed at this time. On the one hand, the heating effect of air conditioning is fast and the heating effect of floor heating is slow. If you want to heat up quickly in a short time, the two modes can be realized at the same time. On the other hand, due to power consumption, the power consumption of air conditioning is greater than that of floor heating, so when the room temperature reaches human comfort, the air conditioning is immediately turned off. This kind of thermostat can accomplish this function very well. The comparison of energy consumption should be based on the same temperature regulation effect. In the case of the same temperature control, the energy consumption of floor heating is lower than that of air conditioning. At the same time, floor heating is in line with the human needs of "warm feet and cool top" in Traditional Chinese medicine, which will give people a comfortable feeling of warm feet and cool head. It is conducive to promoting human metabolism, improving blood circulation, and has a regulatory effect on cardiovascular diseases: it has prevention and treatment effects on arthritis, old cold legs and back pain in the elderly. The heat in floor heating process is mainly radiation heat transfer, indoor temperature distribution is more reasonable. Under the same comfortable conditions, the indoor setting temperature is 2℃ lower than that of the traditional convection heating indoor setting temperature, and the heat consumption can be saved by about 15%.  

Comparing with floor heating, the fan coil system is essentially a completely watery system. Fan Coil Unit includes a fan and a coil which are used for heating and cooling and these units need a thermostat to be controlled. If there is a single coil in the fan coil used, the system is called 2 pipes fan coil system.  Two pipes circulate in the system making distribution and collection. A distribution pipe and a collection pipe are connected to each fan coil unit. In this case, either cold water or hot water can be circulated throughout the system.   If there are two separate pipes as heating and cooling in the fan coil, the installed system is called a four-pipe fan coil system. Four pipes circulate in the system, making two distributions and two collecting. Two distribution pipes and two collector pipes are connected to each fan coil unit. Cold water circulates independently in one of the pipe pairs and hot water in the other. Therefore, heating and cooling can be done simultaneously in each fan coil unit independently of each other. Compared to the 2 pipes, the 4 pipes are more complex but easier for the water management.Since fan coil systems operate in heating and cooling, it is required to perform heating or cooling in summer or winter periods. In this case, we will normally introduce the  change-over sensor which is used to detect water temperature (to judge winter or summer). In General situation, heating or cooling mode selection can be made manually. When heating mode selected; If the room temperature falls below the set temperature, the fan coil is activated and tries to heat the environment. In cooling mode, if the room temperature rises above the set temperature, the fan coil is activated and tries to cool the environment.Where are the fan coil thermostats installed?Fan coil systems used in commercial buildings such as hospitals, hotels, shopping malls and business centers operate in two types. These systems, called 2-pipe and 4-pipe, directly affect the comfort and energy savings of the users.Based on different applications, Modbus/Bacnet/KNX protocol based fan coil thermostat is needed for different installations.

   Are you tired of the hassle of traditional heating systems that often leave you feeling too warm or too cool? Look no further than the ETOPECO ZigBee 3.0 Smart Wireless Floor Heating for a comfortable and cozy living experience.     This smart adopts ZigBee 3.0 wireless technology, making it easy to integrate with your smart home devices. With the app on your smart phone or voice control through your smart speaker, you can quickly and easily adjust the temperature, saving you time and effort.   ETOPECO ZigBee 3.0 Smart Wireless Floor Heating  is built for convenience and control. You can choose from WiFi, ZigBee, digital or RF, making it a versatile choice for any home. The  is also easy to install and set up, and its sleek design makes it an attractive addition to any room.   This smart eliminates the guesswork, keeping your home at a comfortable temperature whether you're at work or sleeping. With the 7-day programmable feature, you can set it once, and forget it, saving energy and money.     Upgrade your home heating experience with ETOPECO ZigBee 3.0 Smart Wireless Floor Heating , where convenience and comfort meet. Start enjoying the ultimate comfort and control today!

Floor heating + fan coil system is a system that combines two heating and cooling methods of floor heating and fan coil, which can switch heating or cooling modes according to different seasons and needs, providing a more comfortable and energy-saving indoor environment. In order to better control the floor heating + fan coil system, the intelligent thermostat is an essential equipment, which can remotely control and monitor the operating status of the floor heating + fan coil system through mobile phone application, voice assistant, Internet or other means, which has the following advantages:   • Improve comfort: The smart thermostat can set different temperatures and wind speeds according to different rooms and time periods, and can also automatically adjust the temperature and wind speed to adapt to changes in indoor and outdoor environments. The intelligent thermostat can also match the floor heating + fan coil system to provide constant temperature, constant humidity, constant pressure and other functions.   • Reduce energy consumption: The intelligent thermostat can control the operation of the floor heating + fan coil system according to actual demand, avoiding excessive heating or cooling, thereby saving energy. The intelligent thermostat can also improve the efficiency of the floor heating + fan coil system by optimizing parameters such as water supply temperature, fan speed, valve opening, etc.   • Reduce energy consumption: The intelligent thermostat can control the operation of the floor heating + fan coil system according to actual demand, avoiding excessive heating or cooling, thereby saving energy. The intelligent thermostat can also improve the efficiency of the floor heating + fan coil system by optimizing parameters such as water supply temperature, fan speed, valve opening, etc.   • Increased flexibility: The smart thermostat can support multiple types of floor heating + fan coil systems, such as 2-pipe, 4-pipe, 2-pipe + 2-stage heating, etc. The smart thermostat can also support wired or wireless connectivity, as well as 230 volt or 24 volt power supply. The smart thermostat can also be linked with other smart home devices to achieve more functions   Our smart floor heating + fan coil system thermostat will be available soon, so stay tuned!