CN106196564A - A self-regulating premixed gas heating system and its control method - Google Patents

Abstract

The invention discloses a self-adjusting premixed gas heating system, which is characterized in that: including the shell, be equipped with heat exchange combustion chamber and main control unit in the shell, the one end of heat exchange combustion chamber is connected with the fan that is used for controlling air and gas flow, the fan is connected with the gas proportional valve that is used for controlling gas flow and is used for detecting the wind pressure transducer of fan output flow, main control unit is connected with wind pressure transducer and controls the output of fan, gas proportional valve respectively through wind pressure transducer's information. The invention overcomes the defects of the technology and provides a self-adjusting premixing gas heating system.A controller controls the rotating speed of a fan and the gas flow of a flow valve in real time by detecting the wind pressure output by the fan, so that the system meets the heating power requirement of a user, and the combustion working condition can be automatically adjusted to the optimal state.

Description

A self-regulating premixed gas heating system and its control method

[technical field]

The invention relates to a self-regulating premixed gas heating system and a control method thereof.

[Background technique]

At present, most of the premixed gas heating systems at home and abroad are shown in Figure 4, where A is air. The premixed gas heating system in Figure 4 is mainly composed of heat exchange combustion chamber 2, fan 3, pneumatic gas/air proportional valve 5, The main controller is composed of 4. During the production of the heating system, the parameters such as fan speed, wind pressure, gas valve flow and other parameters should be adjusted in advance to meet the user's requirements. However, in actual work, changes in gas composition, gas pressure, and voltage can cause changes in equipment ignition success rate, combustion thermal efficiency, etc. Obviously, the fan speed, wind pressure, and gas valve flow rate adjusted at the beginning cannot change with the actual working conditions. auto-adjust.

[Content of the invention]

The present invention overcomes the deficiencies of the above technologies and provides a self-regulating premixed gas heating system. The controller controls the fan speed and the gas flow rate of the flow valve in real time by detecting the output wind pressure of the fan, which not only makes the system reach the user's heating power Requirements, and the combustion conditions can be automatically adjusted to the best state.

To achieve the above object, the present invention adopts the following technical solutions:

A self-regulating premixed gas heating system, characterized in that: it includes a casing, a heat exchange combustion chamber and a main controller are arranged in the casing, and a fan for controlling the flow of air and gas is connected to one end of the heat exchange combustion chamber , the blower is connected with a gas proportional valve for controlling the flow of gas and a wind pressure sensor for detecting the output flow of the blower, the main controller is connected with the wind pressure sensor and controls the blower and gas respectively through the information of the wind pressure sensor The output of the proportional valve.

A self-regulating premixed gas heating system as described above is characterized in that: the wind pressure sensor is set on the main controller, and the air pressure sensor on the main controller and the fan and the gas proportional valve Air pressure conduction pipes for controlling the pressure difference of the gas proportional valve are respectively connected with the fan.

A self-regulating premixed gas heating system as described above is characterized in that a gas mixing pipe for mixing air and gas and supplying air to the heat exchange combustion chamber is connected between the heat exchange combustion chamber and the fan.

A control method for a self-regulating premixed gas heating system, the steps of which are as follows:

a. Set the heating or bathing heating power through the main controller, and start the system to work;

b. The fan, air pressure sensor and gas proportional valve start to work;

c. The main controller is high-voltage ignition and fire detection. The main controller controls the opening of the fan and gas proportional valve according to the heating or bathing heating power set by the user, and adjusts the heating power of the flame;

d. When the main controller detects that the water temperature does not reach the user's set value, the main controller adjusts the gas proportional valve and fan until the user's hot water volume and optimal combustion conditions are met.

The beneficial effects of the present invention are:

In the present invention, a wind pressure sensor for detecting wind pressure is installed on the fan, and the controller controls the fan speed and the gas flow rate of the flow valve in real time according to the feedback information of the wind pressure, so that the system can always be automatically adjusted to the optimum level under the influence of the external environment. good condition.

[Description of drawings]

Fig. 1 is the structural representation 1 of the present invention;

Fig. 2 is the structural representation 2 of the present invention;

Fig. 3 is a structural schematic diagram 3 of the present invention;

Fig. 4 is a schematic structural diagram of an existing self-regulating premixed gas heating system.

[detailed description]

A further detailed description will be made below in conjunction with the accompanying drawings and embodiments of the present invention:

As shown in Figure 4, in the existing premixed gas heating system, the heating system can only make a complex comprehensive adjustment of the fan speed and the gas valve flow rate during production, so that the heating system can reach the best working condition required by the user. However, in the actual operation of the system, changes in gas composition, gas pressure, temperature, and voltage can cause changes in the success rate of equipment ignition and combustion thermal efficiency. Obviously, the initial adjustment cannot meet the changed actual situation and meet the user's best working condition requirements. That is, the existing premixed gas heating system shown in Fig. 4 is equivalent to open-loop control in theory, where A is air and B is gas.

As shown in Figure 1-3: a self-regulating premixed gas heating system, including a casing 1, a heat exchange combustion chamber 2 and a main controller 4 are arranged inside the casing 1, and one end of the heat exchange combustion chamber 2 is connected to There is a fan 3 for controlling the flow of air and gas, the fan 3 is connected with a gas proportional valve 5 for controlling the flow of gas and a wind pressure sensor 6 for detecting the output flow of the fan 3, the main controller 4 and the wind pressure sensor 6 phases are connected and the output of the fan 3 and the gas proportional valve 5 are respectively controlled through the detection information of the wind pressure sensor 6; the heat exchange combustion chamber 2 and the fan 3 are connected to be used for mixing air and gas and are a heat exchange combustion chamber 2 Air mixing pipe 7 for air supply; the air mixing pipe 7 between the heat exchange combustion chamber 2 and the fan 3 is a mixed gas of air and gas, wherein A is air and B is gas.

As shown in Figure 3: described wind pressure sensor 6 is arranged on the main controller 4, between the wind pressure sensor 6 on the described main controller 4 and blower fan 3 and between gas proportional valve 5 and blower fan 3, it is useful to connect respectively It is used to control the air pressure conduction pipe 8 of the pressure difference of the gas proportional valve 5 . The wind pressure sensor 6 controls the pressure difference of the gas proportional valve 5 through the wind pressure conduction pipe 8 and transmits the detection information of the output flow of the blower 3 to the main controller 4, so that the main controller 4 uses the detection information of the wind pressure sensor 6 to Control the output of fan 3 and gas proportional valve 5 respectively.

A control method for a self-regulating premixed gas heating system, the steps of which are as follows:

a. Set the heating or bathing heating power through the main controller 4, and start the system to work;

b. Fan 3 and air pressure sensor 6 start to work;

c. The main controller 4 ignites with high pressure, and the gas proportional valve 5 is opened. The main controller 4 controls the opening of the fan 3 and the gas proportional valve 5 according to the heating or bathing heating power set by the user, and adjusts the heating power of the flame;

d. When the main controller 4 detects that the water temperature does not reach the value set by the user, the main controller 4 simultaneously adjusts the gas proportional valve 5 and the fan 3, and adjusts the flame heating power to increase the water temperature.

e. Automatically control the gas proportional valve 5 and fan 3 according to the heating or bathing water outlet temperature set by the user, so that the fully preheated mixed gas heating system meets the user's heating power and water temperature requirements, and makes the gas combustion thermal efficiency and combustion conditions the best.

The working principle is as follows: Assuming that the heat exchange combustion chamber 2 conducts the gas combustion heat to the water flowing in the heat exchange combustion chamber 2, the user sets the heating temperature through the main controller 4, after starting the system, the main controller 4 controls the high-voltage ignition, The gas proportional valve 5 and the fan 3 work at the same time. The wind pressure sensor 6 detects the pressure at the output end of the fan 3 and feeds back the wind pressure information to the main controller 4. The main controller 4 controls the speed of the fan 3 and the gas proportional valve according to the feedback information. 5 output gas flow, when the water temperature does not reach the value set by the user, the main controller 4 adjusts the speed of the gas proportional valve 5 and fan 3, and adjusts the flame heating power to increase the water temperature. The wind pressure sensor 6, fan 3, and gas proportional valve 5 make the hot water volume, heating power and combustion conditions required by the user reach the optimum value under the command of the main controller 4.

Claims (4)

1. A self-regulating premixed gas heating system, characterized in that: it includes a shell (1), and a heat exchange combustion chamber (2) and a main controller (4) are arranged in the shell (1), and the heat exchange One end of the combustion chamber (2) is connected with a fan (3) for controlling the flow of air and gas, and the fan (3) is connected with a gas proportional valve (5) for controlling the flow of gas and for detecting the output flow of the fan (3). The wind pressure sensor (6), the main controller (4) is connected with the wind pressure sensor (6) and controls the blower fan (3) and the gas proportional valve (5) respectively through the detection information of the wind pressure sensor (6). Output. 2. A self-regulating premixed gas heating system according to claim 1, characterized in that: the wind pressure sensor (6) is set on the main controller (4), and the main controller (4) Wind pressure conduction pipes (8) for controlling the pressure difference of the gas proportional valve (5) are respectively connected between the wind pressure sensor (6) and the blower fan (3) and between the gas proportional valve (5) and the blower fan (3). 3. A self-regulating pre-mixed gas heating system according to claim 1, characterized in that: the heat exchange combustion chamber (2) and the fan (3) are connected with a device for mixing air and gas and for heat exchange Gas mixing pipe (7) for gas supply to combustion chamber (2). 4. A self-regulating premixed gas heating system control method, the steps are as follows: a. Set the heating or bathing heating power through the main controller (4), and start the system to work; b. Fan (3), wind pressure sensor (6), and gas proportional valve (5) start to work; c. The main controller (4) controls the opening of the fan (3) and the gas proportional valve (5) according to the heating or bathing heating power set by the user, and adjusts the heating power of the flame; d. When the main controller (4) detects that the water temperature does not reach the value set by the user, the main controller (4) adjusts the gas proportional valve (5) and the fan (3) until the user's hot water volume and optimal combustion conditions are met.