TWI821703B - Intelligent wide calorific value gas equipment and its control method - Google Patents

Abstract

An intelligent wide calorific value gas equipment includes: a combustion device, an igniter, a gas valve, a blower, a detection device and a control device. The control method includes: the control device operates in a detection mode, and the control device The device controls the igniter to ignite, and controls the gas valve and the blower to provide a fixed gas flow rate and a fixed air volume to the combustion device; after the flame is ignited, the control device determines what is detected by the detection device. The combustion state, if it meets the first state, the control device controls the gas valve and the blower based on a first control data corresponding to the first natural gas; if it meets the second state, the control device controls the gas valve and the blower based on a second control data corresponding to the second natural gas. The control data controls the gas valve and the blower. In this way, natural gas with different calorific values is applicable.

Description

Intelligent wide calorific value gas equipment and its control method

The present invention relates to gas equipment; in particular, it refers to an intelligent wide calorific value gas equipment and a control method thereof.

The gas equipment is connected to the gas supply pipe, and the natural gas used is transported to the user end by the gas company through the transmission pipeline. Natural gas has different calorific values depending on where it is extracted. In order to avoid different calorific values from affecting the combustion efficiency and safety of gas equipment at the user end, gas companies usually only supply natural gas with the same calorific value to users on the same transmission pipeline.

When the calorific value of the natural gas purchased by the gas company changes, for example, when the natural gas with low calorific value is purchased to the natural gas with high calorific value, if the natural gas with high calorific value is directly injected into the transmission pipeline, it will cause the user's gas If the gas combustion in the equipment is incomplete, there is a risk of excessive carbon monoxide. On the contrary, if the natural gas with high calorific value is directly injected into the transmission pipeline with natural gas with low calorific value, the combustion efficiency of the user's gas equipment will be poor.

In view of this, the purpose of the present invention is to provide an intelligent wide calorific value gas equipment and a control method thereof, which can be applied to natural gas with different calorific values.

In order to achieve the above object, the present invention provides an intelligent wide calorific value gas equipment, which is used to connect a gas supply pipe. The gas supply pipe is used to input gas. The gas is one of a first natural gas and a second natural gas. and the calorific value of the first natural gas and the second natural gas are different; the intelligent wide calorific value gas equipment includes: a combustion device, an igniter, a gas valve, a blower, a detection device and a control device , wherein the combustion device is used to burn gas to generate a flame; the igniter is provided next to the combustion device to ignite the gas output by the combustion device; the gas valve connects the gas supply pipe and the combustion device, and the gas valve The blower is controlled to change the gas flow rate supplied to the combustion device; the blower is controlled to change the air volume supplied to the combustion device; the detection device is used to detect the combustion state of the flame of the combustion device; the control The device is electrically connected to the gas valve, the blower and the detection device. The control device operates in a detection mode. In the detection mode, the control device controls the igniter to ignite and controls the gas valve and the blower, To provide a fixed gas flow rate and a fixed air volume to the combustion device; after the flame is ignited, the control device determines that the combustion state detected by the detection device conforms to a first state or a second state, if In line with the first state, the control device operates in a first operating mode. The control device controls the gas valve and the blower according to a first control data corresponding to the first natural gas, so that the combustion device is suitable for burning the first natural gas. Natural gas; if the second state is met, the control device operates in a second operation mode, and the control device controls the gas valve and the blower according to a second control data corresponding to the second natural gas to make the combustion device suitable For burning the second natural gas.

The invention provides a control method for intelligent wide calorific value gas equipment, which is executed by the control device and includes the following steps: the control device operates in a detection mode, the control device controls the igniter to ignite, and controls the The gas valve and the blower are used to provide a fixed gas flow rate and a fixed air volume to the combustion device; After the flame is ignited, the control device determines that the combustion state detected by the detection device meets a first state or a second state, wherein: if it meets the first state, the control device operates in a first operation mode , the control device controls the gas valve and the blower according to a first control data corresponding to the first natural gas, so that the combustion device is suitable for burning the gas of the first natural gas; if the second state is met, the control device operates in In a second operating mode, the control device controls the gas valve and the blower according to a second control data corresponding to the second natural gas, so that the combustion device is suitable for burning the second natural gas.

The effect of the present invention is that the control device can determine that the gas supplied by the gas supply pipe is the first natural gas or the second natural gas according to the flame state, and set it to the corresponding first operation mode or the second operation mode, so as to It is suitable for burning the first natural gas or the second natural gas with different calorific values.

[Invention]

1: Intelligent wide calorific value gas equipment

10: Combustion device

12: Igniter

14:Gas valve

142: Gas regulating valve

144: Channel solenoid valve

16: Blower

18:Detection device

182: Thermocouple

20:Control device

202:Memory

22:Mixer

24: Operation interface

2: Intelligent wide calorific value gas equipment

26: Combustion device

262: Mother fire burner

264: Main fire burner

28: Combustion chamber

30:Gas valve

302: Mother fire solenoid valve

304: Main fire solenoid valve

306: Gas regulating valve

32: Blower

34:Detection device

342: Flame sensing electrode

36:Control device

3: Intelligent wide calorific value gas equipment

38: Flame height sensing module

382: Flame sensing electrode

4: Intelligent wide calorific value gas equipment

40:Infrared detector

42:Water pipe

422: Water inlet pipe section

424: Heating pipe section

426: Outlet pipe section

44: Inlet water temperature detector

46: Outlet water temperature detector

48:Water flow detector

50:Exhaust channel

6: Intelligent wide calorific value gas equipment

7: Intelligent wide calorific value gas equipment

52:Gas detector

P:gas supply pipe

Figure 1 is a schematic diagram of a smart wide calorific value gas equipment according to the first preferred embodiment of the present invention.

Figure 2 is a flow chart of the control method of the intelligent wide calorific value gas equipment according to the first preferred embodiment of the present invention.

Figure 3 is a schematic diagram of a smart wide calorific value gas equipment according to the second preferred embodiment of the present invention.

Figure 4 is a schematic diagram of a smart wide calorific value gas equipment according to the third preferred embodiment of the present invention.

Figure 5 is a schematic diagram of a smart wide calorific value gas equipment according to the fourth preferred embodiment of the present invention.

Figure 6 is a schematic diagram of a smart wide calorific value gas equipment according to the fifth preferred embodiment of the present invention.

Figure 7 is a schematic diagram of a smart wide calorific value gas equipment according to the sixth preferred embodiment of the present invention.

Figure 8 is a schematic diagram of a smart wide calorific value gas equipment according to the seventh preferred embodiment of the present invention.

In order to illustrate the present invention more clearly, the preferred embodiments are described in detail below along with the drawings. Please refer to Figure 1, which is a smart wide calorific value gas equipment 1 according to the first preferred embodiment of the present invention. It is used to connect a gas supply pipe P. The gas supply pipe P is used to input gas. The gas is natural gas and Supplied by gas company. The gas is one of a first natural gas and a second natural gas, and the calorific value of the first natural gas and the second natural gas are different. In this embodiment, the calorific value of the first natural gas is smaller than the calorific value of the second natural gas. Value, the calorific value of the first natural gas is 8900Kcal/M ³ as an example, and the calorific value of the second natural gas is 9700Kcal/M ³ as an example, but it is not limited to this. The intelligent wide calorific value gas equipment 1 includes a combustion device 10, an igniter 12, a gas valve 14, a blower 16, a detection device 18 and a control device 20.

The combustion device 10 is used to burn gas to generate flame. The igniter 12 is disposed next to the combustion device 10 for igniting the gas output from the combustion device 10 . The igniter 12 is arranged next to the combustion device 10 . The igniter 12 is used to generate sparks to ignite the gas to form a flame.

The gas valve 14 communicates with the gas supply pipe P and the combustion device 10 , and is controlled to change the gas flow rate supplied to the combustion device 10 . In this embodiment, the gas valve 14 is provided with a gas regulating valve 142 inside, and the gas regulating valve 142 is used to regulate the gas flow flowing to the combustion device. The gas valve 14 is further provided with a channel solenoid valve 144 inside for opening or blocking the gas flowing to the combustion device 10 .

The blower 16 is used to provide combustion-supporting air to the combustion device 10 . The blower 16 can be controlled to change the rotation speed to change the amount of air supplied to the combustion device 10 . In this embodiment, the air outlet of the blower 16 is connected to a mixer 22 , and the mixer 22 is disposed between the gas valve 14 and the combustion device 10 . The gas output from the gas valve 14 is mixed with air through the mixer 22 and then output to the combustion device 10 .

The detection device 18 is used to detect the burning state of the flame of the combustion device 10, and can detect the burning state of the flame directly or indirectly. Directly detecting the burning state of the flame can, for example, be in direct contact with the flame, or be separated from the flame by a distance without contact with the flame. Indirectly detecting the combustion state of the flame may be, for example, by detecting the products of gas combustion, or by detecting the characteristics of the material heated by the flame, and correspondingly obtaining the combustion state of the flame. In this embodiment, the detection device 18 includes a thermocouple 182. The thermocouple 182 is used to contact the flame and detect the flame generated by the combustion device 10 and output a corresponding detection voltage. The detection voltage corresponds to the The combustion state of the flame of the combustion device 10.

The control device 20 is electrically connected to the gas valve 14 , the blower 16 and the detection device 18 . The control device 20 is used to control the operations of the gas valve 14 and the blower 16 to change the gas supplied to the combustion device 10 flow and air volume, and receive the combustion state measured by the detection device 18 . The control device 20 has a memory 202. The memory 202 stores a first control data and a second control data. The first control data corresponds to the first natural gas. The first control data changes at different gas flow rates. There is a corresponding proportioning relationship of air volume for controlling the gas flow rate supplied by the gas valve and the rotation speed of the blower 16, so as to obtain a better matching relationship between the gas and air volume of the first natural gas. The second control data corresponds to the second natural gas. The second control data has corresponding air volume ratios at different gas flow rates to control the gas flow rate supplied by the gas valve 14 and the rotation speed of the blower 16 to obtain the The second is the better ratio relationship between gas and air volume of natural gas. The memory 202 further stores an initial control data, which is used to control the gas valve 14 to supply a fixed gas flow rate, and to control the blower 16 to operate at a fixed speed to provide a fixed air volume. In this embodiment, the initial control data corresponds to the ratio between the gas flow rate and the air volume of the first natural gas, but it is not limited to this. Since the initial control data corresponds to the first natural gas, if the gas The gas input from the supply pipe P is the first natural gas, then the combustion device 10 has better combustion Efficiency, the combustion state of the flame at this time can be predefined as a first state; if the gas input from the gas supply pipe P is the second natural gas, the combustion efficiency of the combustion device 10 is poor, and the combustion state of the flame at this time can be predefined. The combustion state is a second state. In this embodiment, when the combustion state of the flame is the first state, the combustion efficiency is better. The detection voltage output by the thermocouple 182 is greater than a predetermined voltage. On the contrary, if the detection voltage output by the thermocouple 182 is less than the predetermined voltage, , then the burning state of the flame is the second state.

In one embodiment, the initial control data corresponds to a ratio relationship between the gas flow rate and the air volume of the second natural gas. If the gas input by the gas supply pipe P is the first natural gas, the combustion efficiency of the combustion device 10 is poor, and the combustion state of the flame at this time can be predefined as a first state; if the gas input by the gas supply pipe P is Second natural gas, the combustion device 10 has better combustion efficiency, and the combustion state of the flame at this time can be predefined as a second state.

The control device 20 can operate in a detection mode, a first operation mode, or a second operation mode, wherein the detection mode is used to determine whether the input gas is the first natural gas or the second natural gas. The first operation mode is used to control the gas valve 14 and the blower 16 according to the first control data corresponding to the first natural gas. The second operating mode is used to control the gas valve 14 and the blower 16 according to the second control data corresponding to the second natural gas.

In this embodiment, the control device 20 is further connected to an operation interface 24 in a wired or wireless manner. The operation interface 24 is used for the user to operate to output a detection signal or a startup signal to the control device, where the detection signal The control device 20 is caused to execute the detection mode, and the start signal is used to cause the control device 20 to operate in the first operation mode or the second operation mode determined in the detection mode. The operation interface 24 may include at least one switch for outputting a detection signal and a startup signal. For example, long pressing the switch for several seconds generates a detection signal, and short pressing the switch generates a startup signal. In practice, it can also be two switches, including a detection switch and A start switch. The detection switch can be operated by the user and output a detection signal to the control device 20 . The start switch can be operated by the user and output a start signal to the control device 20 . In one embodiment, the source of the detection signal may also be provided by an external electronic device through the network.

The control device 20 is used to execute the control method shown in Figure 2. The control method includes the following steps: in the fire-off state, the control device 20 operates in the detection mode when receiving the detection signal. In the detection mode , the control device 20 controls the igniter 12 to perform ignition, and controls the gas valve 14 and the blower 16 to provide a fixed gas flow rate and a fixed air volume to the combustion device 10 . In this embodiment, the user operates the operating interface 24 to output the detection signal to the control device 20. In the detection mode, the control device 20 starts the ignition of the igniter 12 and controls the gas valve 14 and the gas valve 14 according to the initial control data. The blower 16 provides a fixed gas flow rate and a fixed air volume to the combustion device 10, thereby allowing the gas to burn stably and produce a fixed combustion state, and the combustion state will not be changed due to changes in the gas flow rate or air volume. change.

After the flame is ignited, the detection device 18 detects the combustion state of the flame of the combustion device 10 . The control device 20 determines that the combustion state detected by the detection device 18 is consistent with the first state or the second state. In this embodiment, the control device 20 determines whether the detection voltage output by the thermocouple 182 is greater than the predetermined voltage, and determines whether the first state or the second state is met: if the detection voltage is greater than the predetermined voltage, it is determined that the flame is burning. The state complies with the first state, which means that the gas supplied by the gas supply pipe P is the first natural gas. At this time, the control device 20 switches to the first operation mode. In the first operation mode, the control device 20 switches to the first operation mode. The device 20 controls the gas valve 14 and the blower 16 according to the first control data corresponding to the first natural gas, so that the combustion device 10 is suitable for burning the first natural gas. In other words, in the first operating mode, the air volume and the gas flow rate of the first natural gas have a better ratio relationship. system, so that the combustion device 10 has better combustion efficiency. And the control device 20 sets the first operation mode as a preset operation mode, and then the control device 20 operates in the first operation mode. In other words, after the control device 20 controls the gas valve 14 to block the gas and controls the blower 16 to stop operating, and after the control device 20 receives the start signal, the control device 20 operates in the preset operation mode (i.e., the first operation mode), the igniter 12 is controlled to perform ignition, and the control device 20 controls the gas valve 14 and the blower 16 according to the first control data.

If the detected voltage is less than the predetermined voltage, it is determined that the combustion state of the flame meets the second state, which means that the gas supplied by the gas supply pipe P is the second natural gas. At this time, the control device 20 is switched to operate in the second state. Two operation modes. In the second operation mode, the control device 20 controls the gas valve 14 and the blower 16 according to the second control data corresponding to the second natural gas, so that the combustion device 10 is suitable for burning the second natural gas. gas. In other words, in the second operating mode, the amount of air and the gas flow rate of the second natural gas have a better proportional relationship, so that the combustion device 10 has better combustion efficiency. And the control device 20 sets the second operation mode to the preset operation mode, and then the control device 20 operates in the second operation mode. In other words, after the control device 20 controls the gas valve 14 to block the gas and controls the blower 16 to stop operating, and after the control device 20 receives the start signal, the control device 20 operates in the preset operation mode (i.e., the second operation mode), the igniter 12 is controlled to perform ignition, and the control device 20 controls the gas valve 14 and the blower 16 according to the second control data.

In one embodiment, in the detection mode, when the control device 20 determines that the combustion state detected by the detection device 18 does not meet the first state and the second state, the control device 20 controls the gas valve 14 Block the gas and control the blower 16 to stop running. For example, when the detection voltage of the thermocouple 182 is above a predetermined voltage, it represents the first state; when the detection voltage is less than the predetermined voltage and higher than another predetermined voltage, it represents the second state; when the detection voltage is less than the other predetermined voltage, it represents the second state. when , it is a third state (not consistent with the first state and the second state), The third state represents poor combustion, and the control device 20 controls the gas valve 14 to block gas and the blower 16 to stop running to avoid danger.

Through the above control method, the control device 20 can determine that the gas supplied by the gas supply pipe P is the first natural gas or the second natural gas according to the flame state detected in the detection mode, and set the preset operation mode to After being set to the corresponding first operation mode or the second operation mode, after the smart wide calorific value gas equipment 1 is shut down and restarted, the control device 20 controls the gas valve 14 and the blower 16 in the preset operation mode, so as to It is suitable for burning the first natural gas or the second natural gas.

After that, the user operates the operation interface 24 to output the detection signal to the control device 20, so that the control device 20 can be operated in the detection mode again to set the default operation mode to the appropriate first operation mode or the second operation mode. Two operating modes.

In order to prevent the natural gas supplied by the gas supply pipe P from being changed during the use of the intelligent wide calorific value gas equipment 1, in this embodiment, the control device 20 is operated after the first operation mode or the second operation mode. , will operate in the detection mode again to determine whether the gas supplied by the gas supply pipe P is the first natural gas or the second natural gas.

Wherein, after the control device 20 operates in the first operation mode, the control device 20 will operate in the detection mode again every predetermined time, and the predetermined time may be, for example, 20 to 30 minutes. In the detection mode, the control device 20 controls the gas valve 14 and the blower 16 to provide a fixed gas flow rate and a fixed air volume to the combustion device 10 , and the control device 20 determines that the detection device 18 detects The combustion state meets the first state or the second state. If it meets the first state, it means that the gas is still the first natural gas, and the control device 20 operates in the first operating mode; if it meets the second state, it means that the gas is still the first natural gas. After changing to the second natural gas, the control device 20 is switched to operate in the second operation mode, and the second operation mode is set as the default operation mode.

Wherein, after the control device 20 operates in the second operating mode, the control device 20 will operate in the detection mode again every predetermined time. The control device 20 controls the gas valve 14 and the blower 16 to provide a fixed gas flow rate. A fixed amount of air is supplied to the combustion device 10, and the control device 20 determines that the combustion state detected by the detection device 18 is consistent with the first state or the second state. If it is consistent with the second state, it means that the gas is still If the second natural gas is the second natural gas, the control device 20 operates in the second operating mode; if the first state is met, it means that the gas has changed to the first natural gas, then the control device 20 switches to operating in the first operating mode, and The first operating mode is set as a default operating mode.

Figure 3 shows a smart wide calorific value gas equipment 2 according to the second preferred embodiment of the present invention. It has a structure that is substantially the same as that of the first embodiment. The difference is that the combustion device 26 is located in a combustion chamber 28. And includes a mother fire burner 262 and a main fire burner.

The gas valve 30 communicates with the main fire burner 262 and the main fire burner 264, and has a main fire solenoid valve 302, a main fire solenoid valve 304 and a gas regulating valve 306 inside. The main fire solenoid valve 302 The main fire solenoid valve 304 is used to open or block the gas flowing to the main fire burner 262 and the main fire burner 264 respectively. The gas regulating valve 306 is used to regulate the gas flow flowing to the main fire burner 264 .

The air outlet of the blower 32 is connected to the combustion chamber 28 to provide combustion-supporting air into the combustion chamber 28 .

The detection device 34 includes a flame sensing electrode 342. The flame sensing electrode 342 is used to detect the impedance of the flame generated by the combustion device 26. In this embodiment, the flame sensing electrode 342 is disposed in the combustion chamber 28 and located on the parent fire. Next to burner 262. The flame sensing electrode 342 is electrically connected to the control device. Since the flame has conductive characteristics, the higher the combustion efficiency, the greater the contact area between the flame and the flame sensing electrode 342, and the resistance detected by the flame sensing electrode 342 will increase. The lower the resistance. Therefore, the impedance of the flame detected by the flame sensing electrode 342 corresponds to the combustion state of the flame of the combustion device 26 .

Thereby, the control device 36 can also be applied to the control method of the first embodiment. The difference is that when controlling the igniter 12 to ignite, the control device 36 controls the mother fire solenoid valve 302 to open to ignite the mother fire. After the flame sensing electrode 342 detects the flame of the mother fire, the control device 36 then controls the main fire solenoid valve 304 to open, and controls the gas regulating valve 306 to adjust the gas flow to the main fire burner 264 . The gas flow rate supplied to the primary fire burner 262 is fixed, and the primary fire solenoid valve 302 only needs to be controlled to remain open. Since the amount of air from the blower 32 is supplied to the mother fire burner 262 and the main fire burner 264, the combustion state of the flame of the combustion device 26 can be obtained by detecting the flame generated by the mother fire burner 262. In one embodiment, a flame sensing electrode may also be provided next to the main fire burner 264 to detect the combustion state of the flame generated by the main fire burner 264.

In the detection mode, the control device 36 determines whether the combustion state is the first state or the second state based on the impedance of the flame detected by the flame sensing electrode 342 . The control device 36 determines that the first state is met when the impedance of the detected flame is less than a predetermined impedance, indicating that the gas is the first natural gas; the control device 36 determines that the impedance of the detected flame is greater than the predetermined impedance. , is judged to be consistent with the second state, indicating that the gas is the second natural gas.

Thereby, the control device 36 can also switch to operate in the first operation mode or the second operation mode according to the flame state detected in the detection mode, Figure 4 shows a smart wide calorific value gas equipment 3 according to the third preferred embodiment of the present invention. It has a structure that is substantially the same as that of the second embodiment. The difference is that the detection device 34 includes a flame height Sensing module 38. The flame height sensing module 38 is used to detect the height of the flame generated by the burning device 26. The detected height of the flame corresponds to the burning state of the flame of the burning device 26. The flame sensing electrode 342 is used to detect the presence or absence of the flame of the parent fire.

In this embodiment, the flame height sensing module 38 includes two flame sensing electrodes 382 electrically connected to the control device 36 . The two flame sensing electrodes 382 are located above the main fire burner 264 and are respectively arranged at different heights to detect the height of the flame generated by the main fire burner 264 .

It is hereby defined that the height of the flame when the flame contacts the higher flame sensing electrode 382 is a predetermined height.

The control device 36 is in the detection mode. When the height of the flame detected by the flame height sensing module 38 is greater than the predetermined height, the control device 36 determines that the first state is met, which means that the gas is the first natural gas; When the height of the flame detected by the flame height sensing module 38 is less than the predetermined height, that is, the flame only contacts the lower flame sensing electrode 382 , the control device 36 determines that the second state is met, which represents Gas is the second natural gas.

Thereby, the control device 36 can also switch to operate in the first operation mode or the second operation mode according to the flame state detected in the detection mode.

Figure 5 shows a smart wide calorific value gas equipment 4 according to the fourth preferred embodiment of the present invention. It has a structure that is substantially the same as that of the second embodiment. The difference is that the detection device 34 includes an infrared detector. The infrared detector 40 detects the intensity of the infrared ray generated by the combustion device 26, and the detected intensity of the infrared ray corresponds to the combustion state of the flame of the combustion device 26. The flame sensing electrode 342 is used to detect the presence or absence of the flame of the parent fire.

When the intensity of the detected infrared ray is greater than a predetermined intensity, the control device 36 determines that the first state is met, indicating that the gas is the first natural gas; when the intensity of the detected infrared ray is less than the predetermined intensity, the control device 36 determines that the gas is in compliance with the first state. , is judged to be consistent with the second state, indicating that the gas is the second natural gas.

Thereby, the control device 36 can also switch to operate in the first operation mode or the second operation mode according to the flame state detected in the detection mode, Figure 6 shows a smart wide calorific value gas equipment 5 according to the fifth preferred embodiment of the present invention. It takes a water heater as an example and has a structure that is roughly the same as that of the second embodiment. The difference is that it includes a The water delivery pipe 42 includes a connected water inlet pipe section 422 , a heating pipe section 424 and a water outlet pipe section 426 . The heating pipe section 424 is located above the combustion device 26 . The flame generated by the combustion device 26 heats the heating pipe section 424 . The detection device 34 includes an inlet water temperature detector 44, an outlet water temperature detector 46 and a water flow detector 48 that are electrically connected to the control device. The inlet water temperature detector 44 and the water flow rate detector 48 are disposed in the inlet pipe section 422 , and the outlet water temperature detector 46 is disposed in the outlet pipe section 426 . The inlet water temperature detector 44, the outlet water temperature detector 46 and the water flow rate detector 48 respectively detect the inlet water temperature, outlet water temperature and water flow rate.

There is an exhaust channel 50 above the water pipe 42. The exhaust channel 50 is connected to the combustion device 26. The gas generated by the combustion device 26 burning gas is discharged to the outside through the exhaust channel 50.

In this embodiment, the control device 36 operates in the detection mode when the operation interface 24 outputs the detection signal and the water flow detector 48 detects water flow. In the detection mode, the control device 36 determines whether the combustion state is the first state or the second state based on the impedance of the flame detected by the flame sensing electrode 342 . The control device 36 determines that the first state is met when the impedance of the detected flame is less than a predetermined impedance, indicating that the gas is the first natural gas; the control device 36 determines that the impedance of the detected flame is greater than the predetermined impedance. , is judged to be consistent with the second state, indicating that the gas is the second natural gas.

Thereby, the control device 36 can also switch to operate in the first operation mode or the second operation mode according to the flame state detected in the detection mode.

In the first operating mode or the second operating mode, the control device 36 controls the gas valve 30 and the blower 32 according to the inlet water temperature, outlet water temperature, water flow rate and a set temperature, and the first control data or the second control data.

Figure 7 shows a smart wide calorific value gas equipment 6 according to the sixth preferred embodiment of the present invention. Its structure is the same as that in the fifth embodiment. The difference is that the flame sensing electrode 342 is used to detect the source fire. The presence or absence of flame. The outlet water temperature detector 46 of the detection device 34 detects an outlet water temperature of the water outlet pipe section 426, and the outlet water temperature corresponds to the combustion state of the flame of the combustion device 26. In this detection mode, since the gas flow rate and air volume are fixed, when the outlet water temperature is greater than a predetermined temperature, the control device 36 indicates that the combustion efficiency is good and is judged to be consistent with the first state, indicating that the gas is the first natural gas; the control device 36 When the outlet water temperature is lower than the predetermined temperature, the device 36 indicates that the combustion efficiency is poor and determines that the second state is met, indicating that the gas is the second natural gas.

In addition to judging the burning state of the flame by the temperature of the outlet water. In one embodiment, in the detection mode, the control device 36 calculates the combustion efficiency based on the inlet water temperature, outlet water temperature, and water flow rate. If the combustion efficiency is greater than a predetermined efficiency, it is determined that the first state is met, and the combustion efficiency is less than the predetermined efficiency. , then it is judged to be consistent with the second state.

Figure 8 shows a smart wide calorific value gas equipment 7 according to the seventh preferred embodiment of the present invention. It has a structure that is substantially the same as that of the fifth embodiment. The difference is that the flame sensing electrode 342 is used to detect The presence or absence of the flame of the Mother Fire. The detection device 34 includes a gas detector 52. In this embodiment, the gas detected by the gas detector 52 is carbon monoxide, but is not limited to this and can also detect carbon dioxide. The gas detector 52 is located in the exhaust passage 50 and detects the concentration of the passing gas. The detected concentration of the gas corresponds to the combustion state of the flame of the combustion device 26 .

In the detection mode, when the concentration of the detected gas is less than a predetermined concentration, it means that the combustion efficiency is good, and it is determined that it meets the first state, which means that the gas is the first natural gas. When the concentration of the detected gas is greater than the predetermined concentration, the control device 36 indicates that the combustion efficiency is poor, and determines that the second state is met, indicating that the gas is the second natural gas.

According to the above, the smart wide calorific value gas equipment of the present invention can determine that the gas supplied by the gas supply pipe P is the first natural gas or the second natural gas according to the flame state, and set the corresponding first operation mode or second operating mode, suitable for burning first natural gas or second natural gas with different calorific values.

The above are only the best possible embodiments of the present invention. All equivalent changes made by applying the description and patent scope of the present invention should be included in the patent scope of the present invention.

1: Intelligent wide calorific value gas equipment

10: Combustion device

12: Igniter

14:Gas valve

142: Gas regulating valve

144: Channel solenoid valve

16: Blower

18:Detection device

182: Thermocouple

20:Control device

202:Memory

22:Mixer

24: Operation interface

P:gas supply pipe

Claims (16)

An intelligent wide calorific value gas equipment, used to connect a gas supply pipe, the gas supply pipe is used to input gas, the gas is one of a first natural gas and a second natural gas, and the first natural gas and the third natural gas The calorific values of the two natural gases are different; the smart wide calorific value gas equipment includes: a burning device for burning gas to produce a flame; an igniter, which is provided next to the burning device to ignite the gas output by the burning device; A gas valve, connected to the gas supply pipe and the combustion device, and the gas valve is controlled to change the gas flow rate supplied to the combustion device; a blower, controlled to change the air volume supplied to the combustion device; A detection device is used to detect the combustion state of the flame of the combustion device; a control device is electrically connected to the gas valve, the blower and the detection device. The control device operates in a detection mode. In the detection mode , the control device controls the igniter to ignite, and controls the gas valve and the blower to provide a fixed gas flow rate and a fixed air volume to the combustion device; after the flame is ignited, the control device determines that the detection The combustion state detected by the detection device conforms to a first state or a second state. If it conforms to the first state, the control device operates in a first operating mode, and the control device operates in a first operating mode according to a first value corresponding to the first natural gas. The control data controls the gas valve and the blower so that the combustion device is suitable for burning the first natural gas; if the second state is met, the control device operates in a second operation mode, and the control device operates in a second operation mode according to the corresponding second state. A second control data of natural gas controls the gas valve and the blower so that the combustion device is suitable for burning the second natural gas; wherein the control device determines that the combustion state detected by the detection device is consistent with the first state When, the first operation mode is further set to a preset operation mode; after the control device controls the gas valve to block gas and controls the blower to stop running, the control device receives After a start signal, the control device operates in the preset operating mode, controls the igniter to ignite, and the control device controls the gas valve and the blower according to the first control data; wherein the control device determines that the detection When the combustion state detected by the detection device meets the second state, the second operation mode is further set to the preset operation mode; wherein the control device controls the gas valve to block gas and controls the blower to stop running, After the control device receives the start signal, the control device operates in the preset operating mode, controls the igniter to ignite, and controls the gas valve and the blower according to the second control data. The intelligent wide calorific value gas equipment described in claim 1, wherein when the control device determines that the combustion state detected by the detection device does not comply with the first state and the second state, the control device controls the The gas valve blocks the gas and controls the blower to stop running. The intelligent wide calorific value gas equipment as claimed in claim 1, wherein after the control device operates in the first operating mode, the control device controls the gas valve and the blower at predetermined intervals to provide a fixed amount of gas. The flow rate and a fixed amount of air are supplied to the combustion device, and the control device determines that the combustion state detected by the detection device conforms to the first state or the second state. If it conforms to the first state, the control device operates In the first operating mode; if the second state is met, the control device switches to operating in the second operating mode. The intelligent wide calorific value gas equipment as described in claim 1, wherein after the control device operates in the second operating mode, the control device controls the gas valve and the blower at a predetermined time to provide a fixed amount of gas. The flow rate and a fixed amount of air are supplied to the combustion device, and the control device determines that the combustion state detected by the detection device conforms to the first state or the second state. If it conforms to the second state, the control device operates In the second operating mode; if the first state is met, the control device switches to operating in the first operating mode. The intelligent wide calorific value gas equipment as described in claim 1, wherein the control device operates in the detection mode when receiving a detection signal. The smart wide calorific value gas equipment described in claim 1 includes an exhaust channel connected to the combustion device; wherein the detection device includes a gas detector located in the exhaust channel And the concentration of the gas passing through is detected, and the concentration of the detected gas corresponds to the combustion state of the flame of the combustion device; when the concentration of the detected gas is less than a predetermined concentration, the control device determines that it is consistent with the first state, the control device determines that the second state is met when the concentration of the detected gas is greater than the predetermined concentration. The intelligent wide calorific value gas equipment as described in claim 6, wherein the gas detected by the gas detector is carbon monoxide. The intelligent wide calorific value gas equipment as described in claim 1, wherein the detection device includes a flame sensing electrode, and the flame sensing electrode is used to detect the impedance of the flame generated by the combustion device, and the detected flame The impedance corresponds to the combustion state of the flame of the combustion device; the control device determines that the first state is met when the impedance of the detected flame is less than a predetermined impedance, and the control device determines that the impedance of the detected flame is greater than the predetermined impedance. When the impedance is predetermined, it is determined that the second state is met. The intelligent wide calorific value gas equipment as described in claim 1, wherein the detection device includes a thermocouple, the thermocouple is used to detect the flame generated by the combustion device and output a corresponding detection voltage. The measured voltage corresponds to the combustion state of the flame of the combustion device; the control device determines that the first state is met when the detected voltage is greater than a predetermined voltage; and the control device determines that when the detected voltage is less than the predetermined voltage, To comply with this second state. The intelligent wide calorific value gas equipment as described in claim 1, wherein the detection device includes a flame height sensing module, and the flame height sensing module is used to detect the height of the flame generated by the combustion device, The height of the detected flame corresponds to the combustion state of the flame of the combustion device; the height of the flame detected by the control device when the flame height sensing module is greater than When the height of the flame detected by the flame height sensing module is less than the predetermined height, the control device determines that the flame height is consistent with the first state. The smart wide calorific value gas equipment described in claim 1 includes a water pipe, which includes a connected water inlet pipe section, a heating pipe section and a water outlet pipe section; the flame generated by the combustion device heats the The pipe section is heated; the detection device includes an outlet water temperature detector, which detects an outlet water temperature of the outlet pipe section, and the outlet water temperature corresponds to the combustion state of the flame of the combustion device; the control device controls when the outlet water temperature is greater than a predetermined value. when the outlet water temperature is lower than the predetermined temperature, the control device determines that it is consistent with the second state. The smart wide calorific value gas equipment described in claim 1 includes a water pipe, which includes a connected water inlet pipe section, a heating pipe section and a water outlet pipe section; the flame generated by the combustion device heats the Pipe section heating; the detection device includes an inlet water temperature detector, an outlet water temperature detector and a water flow detector. The inlet water temperature detector, the outlet water temperature detector and the water flow detector are respectively Detect an inlet water temperature, an outlet water temperature and a water flow rate; the control device calculates the combustion efficiency based on the inlet water temperature, the outlet water temperature, and the water flow rate. If the combustion efficiency is greater than a predetermined efficiency, it is determined that the first state is met, and the combustion efficiency If the efficiency is less than the predetermined efficiency, it is determined to be in compliance with the second state. The intelligent wide calorific value gas equipment as described in claim 1, wherein the detection device includes an infrared detector that detects the intensity of infrared rays generated by the combustion device, and the detected infrared rays The intensity corresponds to the burning state of the flame of the combustion device; the control device determines that the first state is met when the intensity of the detected infrared ray is greater than a predetermined intensity, and the control device determines that the intensity of the infrared ray is less than a predetermined intensity. When the predetermined intensity is reached, it is determined to be consistent with the second state. A control method for intelligent wide calorific value gas equipment. The intelligent wide calorific value gas equipment is used to connect a gas supply pipe. The gas supply pipe is used to input gas. The gas is a combination of a first natural gas and a second natural gas. One of them, and the first natural gas and the second natural gas have different calorific values; the intelligent wide calorific value gas equipment includes a combustion device, an igniter, a gas valve, a blower, a detection device and a control Device, wherein the combustion device is used to burn gas to produce a flame; the igniter is provided next to the combustion device to ignite the gas output by the combustion device; the gas valve connects the gas supply pipe and the combustion device, and the gas The valve is controlled to change the gas flow rate supplied to the combustion device; the blower is controlled to change the air volume supplied to the combustion device; the detection device is used to detect the combustion state of the flame of the combustion device; the The control device is electrically connected to the gas valve, the blower and the detection device; the control method is executed by the control device and includes the following steps: the control device operates in a detection mode, and the control device controls the igniter to ignite, And control the gas valve and the blower to provide a fixed gas flow rate and a fixed air volume to the combustion device; after the flame is ignited, the control device determines that the combustion state detected by the detection device meets a first A state or a second state, wherein: if the first state is met, the control device operates in a first operating mode, and the control device controls the gas valve and the blower according to a first control data corresponding to the first natural gas. , so that the combustion device is suitable for burning the first natural gas; if the second state is met, the control device operates in a second operating mode, and the control device controls the second natural gas according to a second control data corresponding to the second natural gas. The gas valve and the blower make the combustion device suitable for burning the second natural gas; wherein, when the control device determines that the combustion state detected by the detection device meets the first state, the first operation mode is Set to a preset operating mode; the control device controls the After the gas valve blocks the gas and controls the blower to stop running, after the control device receives a start signal, the control device operates in the preset operating mode, controls the igniter to ignite, and the control device operates according to the first The control data controls the gas valve and the blower; wherein, when the control device determines that the combustion state detected by the detection device meets the second state, it further sets the second operation mode to the default operation mode; After the control device controls the gas valve to block gas and controls the blower to stop running, and after receiving the start signal, the control device operates in the preset operating mode, controls the igniter to ignite, and the control device The gas valve and the blower are controlled according to the second control data. The control method of intelligent wide calorific value gas equipment as described in claim 14, wherein after the control device operates in the first operating mode, the control device controls the gas valve and the blower at a predetermined time to provide a fixed A gas flow rate and a fixed air volume are supplied to the combustion device, and the control device determines that the combustion state detected by the detection device conforms to the first state or the second state. If it conforms to the first state, then the The control device operates in the first operation mode; if the second state is met, the control device switches to the second operation mode. The control method of intelligent wide calorific value gas equipment as described in claim 14, wherein after the control device operates in the second operation mode, the control device controls the gas valve and the blower at a predetermined time to provide a fixed A gas flow rate and a fixed air volume are supplied to the combustion device, and the control device determines that the combustion state detected by the detection device conforms to the first state or the second state. If it conforms to the second state, then the The control device operates in the second operating mode; if the first state is met, the control device switches to operating in the first operating mode.

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