Wiring-free networking type temperature controller for energy-saving transformation

Abstract

The utility model discloses a wiring-free networking type temperature controller for energy-saving transformation. The wiring-free networking type temperature controller comprises a room controller and a fan coil control system, the fan coil control system is arranged at the air return coil; the room controller and the fan coil control system receive and send data through Bluetooth communication; the room controller comprises a key operation area, a display screen, a ventilation hole, a wiring terminal and a mounting hole; the fan coil control system comprises a data receiving and collecting device and a fan coil control part, and the data receiving and collecting device is connected with the fan coil control part through a cable; the data receiving and collecting device comprises a return air communication chip and a temperature sensor, the return air communication chip is connected with the return air data processing chip in a serial communication mode, and the temperature sensor is connected with the return air data processing chip in an II2C communication mode; and the fan coil control part comprises a return air data processing chip, a relay control module, a power supply module and a fan coil connecting terminal.

Description

Technical Field

[0001] The utility model relates to the technical field of central air - conditioner fan coil unit thermostats, and particularly relates to a wire - free networking type thermostat for energy - saving renovation. Background Art

[0002] As people pay more and more attention to climate change and the impact of human activities on the environment, more and more people are looking for ways to reduce their carbon footprint. One of the simplest ways is to make buildings more energy - efficient. According to the data of the United Nations Environment Programme, buildings account for more than 38% of all energy - related carbon dioxide emissions. Compared with traditional building techniques, in order to achieve the goal of high - efficiency energy conservation, it is necessary to first improve the utilization rate of the heating and cooling system, that is, the efficiency of the equipment itself and during the transmission process. The energy consumption of the central air - conditioner system accounts for more than half of the overall energy consumption of the building.

[0003] In recent years, more and more energy - saving renovation projects of central air - conditioner systems in existing buildings have become one of the key areas promoted by the government. The fan coil unit thermostat is an important part of the energy - saving renovation of the air - conditioner terminal. In energy - saving renovation projects, the technical problems encountered in the secondary construction and renovation of fan coil unit thermostats are: 1. There are often problems such as damage to decoration, difficult communication wiring, and high construction difficulty; 2. At present, most of the fan coil unit thermostats on the market only detect the temperature in the area where the thermostat is installed, and the detected temperature is not sufficient to represent the room temperature, and there is often a phenomenon of turning on the air - conditioner with people wearing thick clothes indoors.

[0004] In view of such technical problems, the technical problem that urgently needs to be solved at present is: how to design a thermostat that can be set through non - wired connection, accurately collect indoor temperature and humidity information, and avoid the construction problems caused by wiring and the inaccurate data collection problems caused by the currently wired - structured thermostats. Summary of the Utility Model

[0005] To overcome the deficiencies of the prior art, the utility model provides a wire - free networking type thermostat for energy - saving renovation. It uses wireless transmission and at the same time adopts the method of return air detection to accurately detect the return air temperature and humidity, and can achieve accurate detection and control of the indoor environment without damaging the existing wall.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A wire - free networking type thermostat for energy - saving renovation, which includes a room controller and a fan coil unit control system;

[0008] The described fan coil control system is set at the return air coil, and is used to receive the control information of the room controller and collect the real-time temperature in the room; the room controller and the fan coil control system receive and send data through Bluetooth communication.

[0009] The described room controller includes a key operation area, a display screen, ventilation holes, terminal blocks, and mounting holes; the key operation area is mainly used for functions such as turning the controller on and off, mode, wind speed, and temperature setting, the display screen mainly displays the room temperature, set temperature, current mode, current wind speed, valve switch state, current time, and signal connection state, the ventilation holes are mainly used to dissipate heat from internal electronic components, the terminal blocks are used to connect the power supply, and the mounting holes are standard 86-box mounting holes.

[0010] An indoor data processing chip, a key processing chip, a liquid crystal driving chip, a power processing chip, and a communication chip are provided in the room controller; the key processing chip is connected to the indoor data processing chip through an I / O port, the liquid crystal driving chip is connected to the indoor data processing chip through SPI communication, the communication chip is connected to the indoor data processing chip through serial communication, and the power processing chip converts the AC-220V power supply into DC-5V to provide power for the control panel.

[0011] The described communication chip includes an indoor Bluetooth chip and a 4G communication chip; the Bluetooth chip is used to communicate with the coil controller, collect the operating state, temperature information of the coil, and control the operation of the coil, and the 4G communication chip is used to upload the collected information to the server through 4G signals to realize remote monitoring of the fan coil through the server.

[0012] The described fan coil control system includes a data receiving and collecting device and a fan coil control unit; the data receiving and collecting device is connected to the fan coil control unit through a twisted pair shielded cable.

[0013] The described data receiving and collecting device includes a return air communication chip and a temperature sensor; the return air communication chip is connected to the return air data processing chip through serial communication, and the temperature sensor is connected to the return air data processing chip through II2C communication.

[0014] The described fan coil control unit includes a return air data processing chip, a relay control module, a power module, and fan coil connection terminals; the return air data processing chip calculates the collected temperature information, communication information, and fan coil state information, and then controls the operating state of the fan coil through the relay control module.

[0015] The described relay control module consists of an NPN transistor Q1, a base resistor R1, a freewheeling diode D1, and a relay JQ1. Among them, the relay coil is connected between the collector and the positive power supply as the collector load. The first end of the base resistor R1 is connected to the control signal input terminal. When the input is 0V, the transistor is cut off, and no current flows through the relay coil, so the relay is released (OFF). On the contrary, when the input is VCC, the transistor is saturated, and a considerable current flows through the relay coil, so the relay is attracted (ON). The emitter of the transistor Q1 is grounded. The positive pole of the freewheeling diode D1 is connected to the collector of the transistor Q1, and the negative pole of the freewheeling diode D1 is connected to the high level of 5V. When the signal input voltage changes from VCC to 0V, the transistor changes from saturation to cut-off. In this way, the current in the relay inductance coil suddenly loses the current-carrying path. Without the freewheeling diode, a large reverse electromotive force will be generated at both ends of the coil, with the polarity being positive at the bottom and negative at the top, and the voltage value can reach more than one hundred volts. This voltage plus the power supply voltage acting on the collector of the transistor is sufficient to damage the transistor.

[0016] The fan coil thermostat provided by the present utility model has the following beneficial effects:

[0017] (1) In the energy-saving renovation project of existing buildings, it is possible to achieve the networked energy-saving renovation control of the fan coil without damaging the existing building decoration and without laying the connecting wire harness from the room controller to the fan coil.

[0018] (2) The room temperature acquisition is placed at the return air outlet, which is more representative of the overall room temperature, further improving the comfort of the central air conditioner and reducing the energy consumption of the fan coil.

[0019] (3) Detect the operating status and operating duration of the fan coil, and use the energy-saving algorithm to control the fan coil in a time-sharing and area-based manner through the server. Moreover, through the billing control algorithm, the functions of timing billing and recharge payment for the fan coil are realized, meeting the application requirements of special scenarios. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the connection structure of the present utility model;

[0021] Figure 2 It is a schematic front view of the room controller;

[0022] Figure 3 It is a schematic back view of the room controller;

[0023] Figure 4 It is a schematic structural diagram of the fan coil control system;

[0024] Figure 5 It is a schematic diagram of the control principle of the fan coil control unit;

[0025] Figure 6 It is a schematic diagram of the internal control principle of the room controller;

[0026] Figure 7 It is a schematic diagram of the relay control principle;

[0027] In the attached drawings, 1 is the room controller, 11 is the key operation area, 12 is the display screen, 13 is the ventilation hole, 14 is the terminal block, 15 is the mounting hole; 2 is the fan coil control system, 20 is the coil, 21 is the return air outlet, 22 is the air outlet, 3 is the data receiving and collecting device, 31 is the upper housing, 32 is the lower housing, 33 is the ventilation hole, 34 is the mounting and fixing hole; 4 is the fan coil control part, 41 is the assembled upper housing, 42 is the assembled lower housing, 43 is the fixing screw hole, 44 is the coil terminal block, 441 is the pressing spring piece, 442 is the fixing screw, 45 is the return air data processing chip, 46 is the relay control module, 47 is the power module; 5 is the indoor data processing chip, 6 is the key processing chip, 7 is the liquid crystal driving chip, 8 is the power processing chip, 9 is the communication chip, 91 is the Bluetooth chip, 92 is the 4G communication chip. Specific embodiments

[0028] The following will describe the present invention in detail through specific embodiments. Those who understand this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification; however, it should be noted that the following specific embodiments do not technically limit the technical solution. Under the guidance of the following technical solutions, those skilled in the art can further extend the technology. The protection scope of this patent application shall be subject to the claims.

[0029] The present invention provides a wire-free networking thermostat for energy-saving renovation, and its control schematic diagram is as Figure 1 shown, including a room controller 1 and a fan coil control system 2. The room controller 1 is installed adjacent to the room wall switch, and the fan coil control system 2 is installed at the coil 20. The room controller 1 and the fan coil control system 2 receive and send data through Bluetooth communication.

[0030] As Figure 2 shown, the room controller includes a key operation area 11 and a display screen 12. The key operation area 11 is mainly used for functions such as turning the controller on and off, mode, wind speed, and temperature setting. The display screen 12 is used to display the room temperature, set temperature, current mode, current wind speed, valve switch state, current time, and signal connection state.

[0031] As Figure 3As shown in the figure, the room controller 1 further includes a ventilation hole 13, a terminal block 14, and a mounting hole 15. The ventilation hole 13 is used to dissipate heat from internal electronic components. The terminal block 14 is used to connect to the power supply. The mounting hole 15 is a standard 86-box mounting hole with a hole pitch of 60 mm.

[0032] The fan coil control system 2 is as Figure 4 shown in the figure. It includes a data receiving and collecting device 3 and a fan coil control unit 4. The data receiving and collecting device 3 is connected to the fan coil control unit 4 through a twisted pair shielded cable. The fan coil control 4 device is installed at the fan coil junction box.

[0033] The structure and principle of the data receiving and collecting device 3 are as Figure 4 、 5 shown in the figure. It includes an upper housing 31, a lower housing 32, a ventilation hole 33, mounting and fixing holes 34, an internal temperature sensor, and a Bluetooth communication module. The upper housing 31 and the lower housing 32 are fixedly connected in a snap-fit manner. After an M4 self-tapping screw passes through the mounting and fixing holes 34, the data receiving and collecting device is installed at the air return opening 21 of the air conditioner. The internal temperature sensor collects the room temperature and transmits it to the room controller 1 through the Bluetooth communication module and is displayed on the display screen 12.

[0034] The fan coil control unit 4 is as Figure 4 shown in the figure. It includes an assembled upper housing 41, an assembled lower housing 42, fixing screw holes 43, and coil terminal blocks 44. The assembled upper housing 41 and the assembled lower housing 42 are fixed by M4 bolts. An M4 self-tapping screw passes through the fixing screw holes 43 to install the fan coil control unit 4 at the coil junction box. The coil terminal blocks 44 include a pressure spring piece 441 and a fixing screw 442. The fan coil connection harness is fixed by adjusting the tightness of the fixing screw;

[0035] The internal control principle of the fan coil control unit 4 is as Figure 5 shown in the figure. It includes a return air data processing chip 45, a relay control module 46, and a power supply module 47. The return air data processing chip 45 performs operations on the collected temperature information, communication information, and fan coil status information, and then controls the operating status of the fan coil through the relay control module 46.

[0036] The relay control module 46 is as Figure 7As shown in the figure, it consists of an NPN transistor Q1, a base resistor R1, a freewheeling diode D1, and a relay JQ1. The relay coil is connected between the collector and the positive power supply as the collector load. The first end of the base resistor R1 is connected to the control signal input terminal. When the input is 0V, the transistor is cut off, and no current flows through the relay coil, so the relay is released (OFF). On the contrary, when the input is VCC, the transistor is saturated, and a considerable current flows through the relay coil, so the relay is attracted (ON). The emitter of the transistor Q1 is grounded. The positive pole of the freewheeling diode D2 is connected to the collector of the transistor Q1, and the negative pole of the freewheeling diode D1 is connected to the high level of 5V. When the signal input voltage changes from VCC to 0V, the transistor changes from saturation to cut-off. In this way, the current in the relay inductance coil suddenly loses the current path. Without the freewheeling diode D1, a large reverse electromotive force will be generated at both ends of the coil, with the polarity being positive at the bottom and negative at the top, and the voltage value can reach more than one hundred volts. This voltage plus the power supply voltage acting on the collector of the transistor is sufficient to damage the transistor.

[0037] The internal control part of the room controller 1 described above is as Figure 6 shown, including an indoor data processing chip 5, a key processing chip 6, a liquid crystal driving chip 7, a power supply processing chip 8, and a communication chip 9. The key processing chip 6 is connected to the indoor data processing chip 5 through an I / O port. The liquid crystal driving chip 7 is connected to the indoor data processing chip 5 through SPI communication. The communication chip 9 is connected to the indoor data processing chip 5 through serial communication. The power supply processing chip 8 converts the AC-220V power supply into DC-5V to provide power for the control panel.

[0038] The communication chip 9 includes a Bluetooth chip 91 and a 4G communication chip 92. The Bluetooth chip 91 is used for communication connection with the controller on the coil, for collecting the operating status, temperature information of the coil, and controlling the operation of the coil. The 4G communication chip 92 is used to upload the collected information to an external server through 4G signals, and realize remote monitoring of the fan coil through the external server.

[0039] After the above structural settings, when the utility model is used for indoor renovation, it can realize the networked energy-saving renovation control of the fan coil without damaging the existing building decoration and without laying the connection wire harness from the room controller to the fan coil; the room temperature acquisition is placed at the return air outlet, which is more representative of the overall room temperature, further improving the comfort of the central air conditioner and reducing the energy consumption of the fan coil; detecting the operating status and operating duration of the fan coil, and using an energy-saving algorithm to control the fan coil time-sharing and zoning through the server, and through the billing control algorithm, realizing the functions of timing billing and recharge payment for the fan coil, meeting the application requirements of special scenarios.

Claims

1. A wiring-free networked thermostat for energy-saving transformation, characterized in that: It includes room controller and fan coil control system; The fan coil control system is arranged at the return air coil; the room controller and the fan coil control system receive and send data via Bluetooth communication; the room controller includes a key operation area, a display screen, ventilation holes, wiring terminals, and mounting holes; the wiring terminals are used to connect a power supply; The fan coil control system comprises a data receiving and collecting device and a fan coil control unit, wherein the data receiving and collecting device is connected to the fan coil control unit via a cable; The data receiving and collecting device includes a return air communication chip and a temperature sensor. The return air communication chip is connected to the return air data processing chip via a serial communication mode, and the temperature sensor is connected to the return air data processing chip via a II2C communication mode. The fan coil control unit includes a return air data processing chip, a relay control module, a power supply module and a fan coil connection terminal.

2. A wiring-free networked thermostat for energy-saving transformation as claimed in claim 1, characterized in that: The room controller is provided with an indoor data processing chip, a button processing chip, a liquid crystal drive chip, a power processing chip and a communication chip. The button processing chip is connected to the indoor data processing chip via an I / O port, the liquid crystal drive chip is connected to the indoor data processing chip via an SPI communication method, the communication chip is connected to the indoor data processing chip via a serial port communication method, and the power processing chip converts the AC-220V power supply into DC-5V to provide power for the control panel.

3. A wiring-free networked thermostat for energy-saving transformation as claimed in claim 1, characterized in that: The communication chip includes an indoor Bluetooth chip and a 4G communication chip. The 4G communication chip is used to upload the collected information to the service via a 4G signal.

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