An intelligent wall-mounted gas furnace control system and method

Abstract

The present invention provides an intelligent wall-mounted gas furnace control system and method, the control system includes a control module, a thermostat, a combustion-supporting fan, a gas solenoid valve, a heat-conducting circulation fan, an ignition module and a battery assembly, the combustion-supporting fan, the gas solenoid valve, the heat-conducting circulation fan, the thermostat, the ignition module and the battery assembly are respectively connected to the control module; the thermostat is used to set the target temperature and establish a combustion dynamic mathematical control model according to the rotation speed of the combustion-supporting fan, the opening of the gas solenoid valve, the rotation speed of the heat-conducting circulation fan, the target temperature and the heating load. In the present invention, the rotation speed of the combustion-supporting fan, the rotation speed of the heat-conducting circulation fan and the flow rate of natural gas are precisely controlled by digital adjustment, so that the NOx and CO emissions after combustion are close to zero, and the heat energy utilization efficiency reaches more than 90% under the condition of ensuring that the indoor set temperature is constant, so as to achieve energy-saving combustion.

Description

Technical Field

[0001] The invention relates to an intelligent wall-mounted gas furnace control system and method. Background Art

[0002] The control circuit of traditional wall-mounted gas heating furnaces is relatively simple and the number of sensors is small. Most of them adopt a constant power control mode, which is generally open-loop control. It does not take into account factors such as indoor temperature fluctuations, changes in outdoor and indoor temperatures, indoor humidity, and whether there are people indoors. This can easily lead to energy waste and poor human comfort.

[0003] Especially when the heating load changes quickly, it is easy to cause flameout, excessive combustion temperature to generate NOx, or incomplete combustion to generate CO. Because the control method is too simple, the ratio of maximum power to minimum power is small, and the power cannot be finely adjusted. It is difficult to achieve constant temperature control in the heating area, the temperature fluctuates greatly, and the comfort level is not high. At the same time, the operation and control system of the gas furnace requires an external AC power supply. In the event of a power outage, the system will not operate.

[0004] The above shortcomings need to be improved. Summary of the invention

[0005] In order to overcome the deficiencies of the existing technology, the present invention provides an intelligent wall-mounted gas furnace control system and method.

[0006] The technical solution of the present invention is as follows:

[0007] An intelligent wall-mounted gas furnace control system, characterized in that it comprises a control module, a thermostat, a combustion-supporting fan, a gas solenoid valve, a heat-conducting circulation fan, an ignition module and a battery assembly, wherein the combustion-supporting fan, the gas solenoid valve, the heat-conducting circulation fan, the thermostat, the ignition module and the battery assembly are respectively connected to the control module;

[0008] The thermostatic controller is used to set the target temperature and establish a combustion dynamic mathematical control model according to the rotation speed of the combustion-supporting fan, the opening of the gas solenoid valve, the rotation speed of the heat transfer circulation fan, the target temperature and the heating load;

[0009] The control module adjusts the rotation speed of the combustion-supporting fan, the opening of the gas solenoid valve, and the rotation speed of the heat transfer circulation fan according to the target temperature and the combustion dynamic mathematical control model.

[0010] According to the above-mentioned present invention, it is characterized in that it further includes a humidifier, the humidifier is connected to the control module, and the control module adjusts the humidification amount of the humidifier according to the target humidity set by the thermostatic controller and the humidity control model.

[0011] Furthermore, it is characterized in that it further includes a temperature sensor, a humidity sensor, an operation keyboard, a display module and a communication module, wherein the temperature sensor, the humidity sensor, the operation keyboard, the display module and the communication module are respectively connected to the constant temperature controller, the constant temperature controller is connected to the control module via an RS422 serial port, and the constant temperature controller is connected to a mobile phone APP and / or the cloud via the communication module.

[0012] The operation keyboard inputs the target temperature and the target humidity.

[0013] Furthermore, it is characterized in that it further includes an occupancy sensor, which is connected to the thermostat controller and is used to detect whether there is anyone in the room.

[0014] Furthermore, it is characterized in that it further includes a sleep module, and the sleep module is connected to the constant temperature controller.

[0015] Furthermore, it is characterized in that the communication module is a low-power ZigBee communication module.

[0016] According to the above-mentioned present invention, it is characterized in that it further includes a thermal power generation module and a battery charging management module, the thermal power generation module and the battery charging management module are respectively connected to the control module, and the thermal power generation module stores electrical energy on the battery assembly through the battery charging management module.

[0017] According to the present invention described above, it is characterized in that it further comprises a storage module, wherein the storage module is connected to the control module, and the storage module is used to store the operating parameters of the control module.

[0018] According to the present invention described above, it is characterized in that the control module adjusts the rotation speed of the combustion-supporting fan, the opening of the gas solenoid valve, and the rotation speed of the heat-conducting circulation fan through PWM.

[0019] According to the present invention as described above, it is characterized in that it further comprises a NOx sensor, a CO sensor and a pressure sensor, and the NOx sensor, the CO sensor and the pressure sensor are respectively connected to the control module.

[0020] A control method for a wall-mounted gas furnace based on the above intelligentization is characterized by comprising:

[0021] The thermostatic controller establishes a combustion dynamic mathematical control model according to the speed of the combustion-supporting fan, the opening of the gas solenoid valve, the speed of the heat transfer circulation fan, the target temperature and the heating load;

[0022] The thermostatic controller sets the target temperature;

[0023] Turn on the combustion-supporting fan, the gas solenoid valve and the heat-conducting circulation fan;

[0024] The ignition module controls the ignition rod to start and make the gas furnace burn;

[0025] The control module adjusts the speed of the combustion-supporting fan, the opening of the gas solenoid valve, and the speed of the heat transfer circulation fan according to the target temperature regulation and the combustion dynamic mathematical control model, so that the indoor temperature reaches the target temperature.

[0026] According to the present invention described above, it is characterized by further comprising the following steps:

[0027] The constant temperature controller establishes a humidity control model according to the target humidity and the humidification amount of the humidifier;

[0028] The thermostatic controller sets the target humidity;

[0029] Turn on the humidifier;

[0030] The control module adjusts the humidification amount of the humidifier according to the target humidity and the humidity control model to make the indoor humidity reach the target humidity.

[0031] The beneficial effects of the present invention are:

[0032] (1) The present invention does not require an external power supply. The power supply is provided by the battery assembly. The thermal power generation module converts thermal energy into electrical energy to provide charging power for the battery assembly.

[0033] (2) The present invention adopts digital regulation to accurately control the rotation speed of the combustion-supporting fan, the rotation speed of the heat transfer circulation fan and the flow rate of natural gas, so that the NOx and CO emissions after combustion are close to zero. While ensuring that the indoor set temperature is constant, the thermal energy utilization efficiency reaches more than 90%, achieving energy-saving combustion.

[0034] (3) The thermostat controller in the present invention can set the target temperature and target humidity, and is provided with a display module. By operating the keyboard to enter the menu, all the operating history and real-time data of the control system can be queried. The thermostat controller uploads the data to the cloud through the local gateway via the ZigBee communication module.

[0035] (4) When the thermostat controller of the present invention is not in operation, it enters a sleep mode through a sleep module, thereby reducing battery power consumption and delaying standby time.

[0036] (5) The present invention can achieve stable combustion at a low load of 10% of the maximum load, greatly improving the temperature condition range, and the ratio of maximum power to minimum power reaches more than 10. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a framework of an embodiment of the present invention;

[0038] Figure 2 FIG. 1 is a flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] like Figure 1 As shown, an intelligent wall-mounted gas furnace control system includes a control module 1, a thermostat 2, a combustion-supporting fan 3, a gas solenoid valve 4, a heat-conducting circulation fan 5, an ignition module 6 and a battery assembly 7. The combustion-supporting fan 3, the gas solenoid valve 4, the heat-conducting circulation fan 5, the thermostat 2, the ignition module 6 and the battery assembly 7 are respectively connected to the control module 1. The thermostat 2 is used to set the target temperature and establish a combustion dynamic mathematical control model according to the speed of the combustion-supporting fan 3, the opening of the gas solenoid valve 4, the speed of the heat-conducting circulation fan 5, the target temperature and the heating load; the control module 1 adjusts the speed of the combustion-supporting fan 3, the opening of the gas solenoid valve 4, and the speed of the heat-conducting circulation fan 5 according to the target temperature and the combustion dynamic mathematical control model. The ignition module 6 is used to control the opening and closing of the ignition rod. The battery assembly 7 is used to provide power for the entire control system.

[0041] Preferably, there are two heat-conducting circulation fans 5, and the two heat-conducting circulation fans 5 are respectively connected to the control module 1, so that the indoor temperature reaches the target temperature faster.

[0042] Preferably, it further includes a humidifier 8, which is connected to the control module 1. The control module 1 adjusts the humidification amount of the humidifier 8 according to the target humidity and humidity control model set by the constant temperature controller 2, so that the indoor humidity is adjusted to the most comfortable value for the human body, avoiding the indoor temperature being too dry due to heating, resulting in a poor user experience.

[0043] Furthermore, it further includes a temperature sensor 9, a humidity sensor 10, an operation keyboard 11, a display module 12 and a communication module 13. The temperature sensor 9, the humidity sensor 10, the operation keyboard 11, the display module 12 and the communication module 13 are respectively connected to the thermostat 2, the thermostat 2 is connected to the control module 1 via the RS422 serial port, the thermostat 2 is connected to the mobile phone APP 14 and / or the cloud 15 via the communication module 13, and the target temperature and target humidity are inputted into the operation keyboard 11. Enter the menu through the display module 12 and the operation keyboard 11 to query all the operation history and real-time data of the control system.

[0044] Specifically, users can pre-set a weekly operating schedule in the thermostat controller, adopt different operating time strategies for weekdays and weekends, or set personalized operating schedules and target temperature and target humidity through a mobile phone APP according to the needs of different families.

[0045] Furthermore, it also includes an occupancy sensor 16, which is connected to the thermostat controller 2. The occupancy sensor 16 is used to detect whether there is anyone in the room. When the occupancy sensor 16 detects that all the people in the room have left, it transmits the relevant data to the control module 1 through the thermostat controller 2. After receiving the data, the control module 1 controls the ignition module 6 to turn off the ignition rod, so that the gas furnace stops burning, so as to avoid energy waste in the case of forgetting to shut down.

[0046] Furthermore, it further includes a sleep module 17, which is connected to the thermostat controller 2. Because the thermostat controller adopts a battery-powered mode, when not working, it is necessary to put each module on the thermostat controller into a sleep state to reduce the loss of battery power and delay the standby time. In the sleep state, the current on the thermostat controller is at the μm level, and the current in the normal working state is within 200ma.

[0047] Furthermore, the communication module 13 is a low-power ZigBee communication module, which can perform normal communication functions while reducing power consumption.

[0048] Preferably, it further includes a thermal power generation module 18 and a battery charging management module 19 , the thermal power generation module 18 and the battery charging management module 19 are respectively connected to the control module 1 , and the thermal power generation module 18 stores electrical energy in the battery assembly 7 through the battery charging management module 19 .

[0049] Preferably, it further includes a storage module 20 , which is connected to the control module 1 , and is used to store operating parameters of the control module 1 .

[0050] Preferably, the control module 1 adjusts the speed of the combustion-supporting fan 3, the opening of the gas solenoid valve 4, and the speed of the heat transfer circulation fan 5 through PWM, so that the NOx and CO emissions after combustion are close to zero. While ensuring that the indoor set temperature is constant, the thermal energy utilization efficiency reaches more than 90%, achieving energy-saving combustion.

[0051] Preferably, it further includes a NOx sensor 21, a CO sensor 22 and a pressure sensor 23. The NOx sensor 21, the CO sensor 22 and the pressure sensor 23 are respectively connected to the control module 1. The NOx sensor 21 and the CO sensor 22 are used to detect the content of NOx and CO in the combustion exhaust gas, and the pressure sensor 23 is used to detect the air pressure inside the combustion furnace.

[0052] like Figure 2As shown, a control method for a wall-mounted gas furnace based on the above intelligentization includes the following steps:

[0053] Step S1: The thermostatic controller establishes a combustion dynamic mathematical control model according to the rotation speed of the combustion-supporting fan 3, the opening of the gas solenoid valve 4, the rotation speed of the heat transfer circulation fan 5, the target temperature and the heating load;

[0054] Step S2: The thermostat controller 2 sets the target temperature;

[0055] Step S3: Turn on the combustion-supporting fan 3, the gas solenoid valve 4 and the heat-conducting circulation fan 5;

[0056] Step S4: the ignition module 6 controls the ignition rod to start, so that the gas furnace burns;

[0057] Step S5: the control module 1 adjusts the speed of the combustion-supporting fan 3, the opening of the gas solenoid valve 4, and the speed of the heat transfer circulation fan 5 according to the target temperature regulation and the combustion dynamic mathematical control model, so that the indoor temperature reaches the target temperature.

[0058] Preferably, the method further comprises the following steps:

[0059] The constant temperature controller 2 establishes a humidity control model according to the target humidity and the humidification amount of the humidifier 8;

[0060] Thermostatic controller 2 sets the target humidity;

[0061] Turn on the humidifier 8;

[0062] The control module 1 adjusts the humidification amount of the humidifier 8 according to the target humidity and the humidity control model so that the indoor humidity reaches the target humidity.

[0063] Preferably, the thermostat controller establishes a combustion dynamic mathematical control model according to the speed of the combustion-supporting fan 3, the opening of the gas solenoid valve 4, the speed of the heat transfer circulation fan 5, the target temperature, the heating load and the outdoor temperature. The thermostat controller receives the local weather forecast through the cloud, and can optimize the combustion dynamic mathematical control model according to the change of the outdoor weather temperature to achieve energy saving effect.

[0064] The beneficial effects of the present invention are:

[0065] (1) The present invention does not require an external power supply. The power supply is provided by the battery assembly. The thermal power generation module converts thermal energy into electrical energy to provide charging power for the battery assembly.

[0066] (2) The present invention adopts digital regulation to accurately control the rotation speed of the combustion-supporting fan, the rotation speed of the heat transfer circulation fan and the flow rate of natural gas, so that the NOx and CO emissions after combustion are close to zero. While ensuring that the indoor set temperature is constant, the thermal energy utilization efficiency reaches more than 90%, achieving energy-saving combustion.

[0067] (3) The thermostat controller in the present invention can set the target temperature and target humidity, and is provided with a display module. By operating the keyboard to enter the menu, all the operating history and real-time data of the control system can be queried. The thermostat controller uploads the data to the cloud through the local gateway via the ZigBee communication module.

[0068] (4) When the thermostat controller of the present invention is not in operation, it enters a sleep mode through a sleep module, thereby reducing battery power consumption and delaying standby time.

[0069] (5) The present invention can achieve stable combustion at a low load of 10% of the maximum load, greatly improving the temperature condition range, and the ratio of maximum power to minimum power reaches more than 10.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent wall-mounted gas furnace control system, characterized in that: It includes a control module, a thermostat, a combustion-supporting fan, a gas solenoid valve, a heat-conducting circulation fan, an ignition module, a battery assembly, a storage module, a thermal power generation module and a battery charging management module, wherein the combustion-supporting fan, the gas solenoid valve, the heat-conducting circulation fan, the thermostat, the ignition module, the battery assembly, the storage module, the thermal power generation module and the battery charging management module are respectively connected to the control module; The thermostatic controller is used to set the target temperature and establish a combustion dynamic mathematical control model according to the rotation speed of the combustion-supporting fan, the opening of the gas solenoid valve, the rotation speed of the heat transfer circulation fan, the target temperature and the heating load; The control module adjusts the speed of the combustion-supporting fan, the opening of the gas solenoid valve, and the speed of the heat transfer circulation fan according to the target temperature and the combustion dynamic mathematical control model; The storage module is used to store the operating parameters of the control module; The thermal power generation module stores electrical energy in the battery assembly through the battery charging management module.

2. The intelligent wall-mounted gas furnace control system according to claim 1 is characterized in that: It further includes a humidifier, which is connected to the control module. The control module adjusts the humidification amount of the humidifier according to the target humidity set by the thermostat controller and the humidity control model.

3. The intelligent wall-mounted gas furnace control system according to claim 2 is characterized in that: It further includes a temperature sensor, a humidity sensor, an operation keyboard, a display module and a communication module. The temperature sensor, the humidity sensor, the operation keyboard, the display module and the communication module are respectively connected to the constant temperature controller, the constant temperature controller is connected to the control module via an RS422 serial port, and the constant temperature controller is connected to a mobile phone APP and / or the cloud via the communication module. The operation keyboard inputs the target temperature and the target humidity.

4. The intelligent wall-mounted gas furnace control system according to claim 2 is characterized in that: It further includes an occupancy sensor, which is connected to the thermostat controller and is used to detect whether there is anyone in the room.

5. The intelligent wall-mounted gas furnace control system according to claim 2 is characterized in that: It further includes a sleep module, which is connected to the thermostat controller.

6. The intelligent wall-mounted gas furnace control system according to claim 3 is characterized in that: The communication module is a low-power ZigBee communication module.

7. The intelligent wall-mounted gas furnace control system according to claim 1 is characterized in that: It further includes a NOx sensor, a CO sensor and a pressure sensor, wherein the NOx sensor, the CO sensor and the pressure sensor are respectively connected to the control module.

8. An intelligent wall-mounted gas stove control method based on any one of claims 1 to 7, characterized in that: include: The thermostatic controller establishes a combustion dynamic mathematical control model according to the speed of the combustion-supporting fan, the opening of the gas solenoid valve, the speed of the heat transfer circulation fan, the target temperature and the heating load; The thermostatic controller sets the target temperature; Turn on the combustion-supporting fan, the gas solenoid valve and the heat-conducting circulation fan; The ignition module controls the ignition rod to start and make the gas furnace burn; The control module adjusts the speed of the combustion-supporting fan, the opening of the gas solenoid valve, and the speed of the heat transfer circulation fan according to the target temperature regulation and the combustion dynamic mathematical control model, so that the indoor temperature reaches the target temperature.

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