Control system and method of warmer

Abstract

The invention relates to gas equipment, and discloses a control system and method for a warmer, the control system comprises a first gas inlet pipeline and a second gas inlet pipeline, the first gas inlet pipeline and the second gas inlet pipeline are respectively provided with a first gas outlet and a second gas outlet, a first thermocouple is arranged at the first gas outlet, and a second thermocouple is arranged at the second gas outlet; the first microswitch is arranged on the first air inlet pipeline; the second microswitch is arranged on the second air inlet pipeline; and the controller is respectively connected with the first microswitch, the second microswitch, the first thermocouple, the second thermocouple and the electromagnetic valve. The current fuel type is determined according to the combustion conditions detected by the first thermocouple and the second thermocouple, the current air inlet is determined according to the air inlet condition detected by the first microswitch and the second microswitch, whether the heater is correctly connected with air or not and whether fuel is normal or not are accurately judged, the electromagnetic valve is controlled to act on the basis, and accurate control over the electromagnetic valve is guaranteed; safe combustion of gas is guaranteed, and the warmer can be used normally.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment, and in particular to a control system and method for a heater. Background Art

[0002] At present, multi-fuel heaters mainly detect whether the gas is burning normally by detecting the flame during ignition through two thermocouples set in parallel at the nozzle; the positive pole of one of the two thermocouples is connected to the negative pole of the other thermocouple. During normal combustion, the thermocouple close to the nozzle will contact the flame and generate a potential difference, while the thermocouple far away from the nozzle will not contact the flame and will not generate a potential difference. At this time, the potential difference generated by the two thermocouples can be superimposed to open the valve and the heater can work normally. However, since the flame length is difficult to control, during normal combustion, the thermocouple far away from the nozzle will also contact the flame and generate a certain potential difference, resulting in the potential difference generated by the two thermocouples being insufficient to open the valve after superposition, which in turn causes the heater to fail to work properly. Therefore, there is a problem of misjudgment of the combustion situation, which causes the heater to fail to work normally. Summary of the invention

[0003] The first technical problem solved by the present invention is to provide a control system for a heater, which effectively solves the problem that the heater cannot be used normally due to misjudgment of the combustion condition.

[0004] The second technical problem solved by the present invention is to provide a control method for a heater, which effectively solves the problem that the heater cannot be used normally due to misjudgment of the combustion condition.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A control system for a heater, comprising:

[0007] A first air intake pipeline and a second air intake pipeline, the first air intake pipeline and the second air intake pipeline correspond to the fuel type one by one, the first air intake pipeline and the second air intake pipeline both have a first air outlet and a second air outlet, a first thermocouple is arranged at the first air outlet, and a second thermocouple is arranged at the second air outlet;

[0008] A first micro switch is arranged on the first air intake pipe;

[0009] A second micro switch is arranged on the second air intake pipe;

[0010] A controller is connected to the first micro switch, the second micro switch, the first thermocouple, the second thermocouple and the solenoid valve respectively;

[0011] The controller is used to determine the current air inlet based on the detection results of the first micro switch and the second micro switch, determine the current fuel type based on the detection results of the first thermocouple and the second thermocouple, and control the action of the solenoid valve based on the current air inlet and the current fuel type.

[0012] Compared with the background technology, the control system of the heater of the present invention has the following beneficial effects: on the one hand, the first air outlet and the second air outlet are shared by the first air inlet pipeline and the second air inlet pipeline, and the fuel connected from the first air inlet pipeline or the second air inlet pipeline is output to the first air outlet and / or the second air outlet, and at the same time, the first thermocouple arranged at the first air outlet and the second thermocouple arranged at the second air outlet respectively detect the combustion conditions at the first air outlet and the second air outlet, so as to determine the current fuel in combination with the combustion conditions at the first air outlet and the second air outlet; on the other hand, by A first microswitch is arranged on the pipeline, and a second microswitch is arranged on the second air intake pipeline, and the air intake conditions of the first air intake pipeline and the second air intake pipeline are respectively detected to determine the current air intake port; thus, the current fuel type is determined in combination with the combustion conditions detected by the first thermocouple and the second thermocouple, and the current air intake port is determined in combination with the air intake conditions detected by the first microswitch and the second microswitch, so as to accurately judge whether the heater is correctly connected to the gas and whether the fuel is normally fueled, and based on this, the action of the solenoid valve is controlled to ensure accurate control of the solenoid valve, ensure safe combustion of the gas, and normal use of the heater.

[0013] In one embodiment, the first air intake line includes a first air intake port; a first micro switch is disposed at the first air intake port, and the first micro switch is triggered when the first air intake port is connected to fuel;

[0014] The second air intake pipeline includes a second air intake port; a second micro switch is arranged at the second air intake port, and the second micro switch is triggered when the second air intake port is connected to fuel.

[0015] In one embodiment, a first ignition needle is disposed between the first air outlet and the first thermocouple, and a second ignition needle is disposed between the second air outlet and the second thermocouple;

[0016] The first ignition needle is used to ignite the fuel output from the first gas outlet, and the first thermocouple is used to contact the flame generated by the ignition of the first ignition needle;

[0017] The second ignition needle is used to ignite the fuel output from the second gas outlet, and the second thermocouple is used to contact the flame generated by the ignition of the second ignition needle.

[0018] In one embodiment, the first air inlet pipeline and the second air inlet pipeline are respectively connected to the air outlet pipeline, and the air outlet pipeline is respectively connected to the first air outlet and the second air outlet.

[0019] The above second technical problem is solved by the following technical solution:

[0020] A method for controlling a heater, applied to a control system of any of the above heaters, the method comprising:

[0021] Respectively acquiring a first sensing signal value of the first micro switch and a second sensing signal value of the second micro switch, and determining a current air inlet based on the first sensing signal value and the second sensing signal value;

[0022] Respectively acquiring a first voltage signal value of the first thermocouple and a second voltage signal value of the second thermocouple, and determining a current fuel type based on the first voltage signal value and the second voltage signal value;

[0023] Based on the current intake air and the current fuel type, the actuation of the solenoid valve is controlled.

[0024] Compared with the background technology, the control method of the heater of the present invention has the following beneficial effects: on the one hand, the detection result of the first micro switch on the air intake condition of the first air intake pipe is represented by the first induction signal value, and the detection result of the second micro switch on the air intake condition of the second air intake pipe is represented by the second induction signal value, so that the current air intake port can be correctly judged according to the first induction signal value and the second induction signal value; on the other hand, the detection result of the combustion condition of the first air outlet by the first thermocouple is represented by the first voltage signal value, and the detection result of the combustion condition of the second air outlet by the second thermocouple is represented by the second voltage signal value, so that the current fuel type can be correctly judged according to the first voltage signal value and the second voltage signal value; thereby, it is possible to accurately judge whether the heater is correctly connected to the gas and whether the fuel is normally fueled, and based on this, the action of the solenoid valve is controlled to ensure accurate control of the solenoid valve, ensure safe combustion of the gas, and ensure normal use of the heater.

[0025] In one embodiment, respectively obtaining a first sensing signal value of a first micro switch and a second sensing signal value of a second micro switch includes:

[0026] If the first air inlet of the first air inlet line is connected to fuel to trigger the first micro switch, the first sensing signal value obtained is a first preset value;

[0027] If the first air inlet is not connected to the fuel, the acquired first sensing signal value is a second preset value;

[0028] If the second air inlet of the second air inlet line is connected to fuel to trigger the second micro switch, the second sensing signal value obtained is a first preset value;

[0029] If the second air inlet is not connected to the fuel, the acquired second sensing signal value is a second preset value.

[0030] In one embodiment, determining the current air inlet based on the first sensing signal value and the second sensing signal value includes:

[0031] If the first sensing signal value is a first preset value, and the second sensing signal value is a second preset value, then determining that the current air inlet is the first air inlet;

[0032] If the second sensing signal value is the first preset value, and the first sensing signal value is the second preset value, it is determined that the current air inlet is the second air inlet.

[0033] In one embodiment, respectively obtaining a first voltage signal value of a first thermocouple and a second voltage signal value of a second thermocouple includes:

[0034] respectively obtaining a potential difference between two ends of the first thermocouple and a potential difference between two ends of the second thermocouple;

[0035] If the potential difference between the two ends of the first thermocouple is greater than the preset potential difference, the acquired first voltage signal value is a third preset value;

[0036] If the potential difference between the two ends of the first thermocouple is less than the preset potential difference, the acquired first voltage signal value is a fourth preset value;

[0037] If the potential difference between the two ends of the second thermocouple is greater than the preset potential difference, the acquired second voltage signal value is a third preset value;

[0038] If the potential difference between the two ends of the second thermocouple is less than the preset potential difference, the acquired second voltage signal value is a fourth preset value.

[0039] In one embodiment, determining the current fuel type based on the first voltage signal value and the second voltage signal value includes:

[0040] If the first voltage signal value and the second voltage signal value are both the third preset value, it is determined that the current fuel type is the first type; the first type is consistent with the fuel type corresponding to the first air inlet;

[0041] If the first voltage signal value and the second voltage signal value are not equal, it is determined that the current fuel type is the second type; the second type is consistent with the fuel type corresponding to the second air inlet.

[0042] In one embodiment, based on the current air intake and the current fuel type, controlling the action of the solenoid valve includes:

[0043] If the fuel type corresponding to the current air inlet is consistent with the current fuel type, the solenoid valve is controlled to open;

[0044] If the fuel type corresponding to the current air intake port is inconsistent with the current fuel type, the solenoid valve is controlled to close. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a schematic diagram of an equivalent circuit of two thermocouples connected in parallel in the related art;

[0047] Figure 2 is a structural schematic diagram of a control system of a heater according to an embodiment of the present invention;

[0048] Figure 3 yes Figure 2 Schematic diagram of the bottom structure of part A;

[0049] Figure 4 is a flow chart of a method for controlling a heater according to an embodiment of the present invention;

[0050] Figure 5 is a schematic diagram of a flow chart of determining a current air inlet in a method for controlling a heater according to an embodiment of the present invention;

[0051] Figure 6 It is a flow chart of determining the current fuel type in a method for controlling a heater according to an embodiment of the present invention.

[0052] Description of reference numerals:

[0053] 1. First air intake pipeline; 11. First micro switch; 12. First air intake port; 13. First pressure-stabilizing valve; 2. Second air intake pipeline; 21. Second micro switch; 22. Second air intake port; 23. Second pressure-stabilizing valve; 3. First air outlet; 4. Second air outlet; 5. First thermocouple; 6. Second thermocouple; 7. Controller; 8. Solenoid valve; 9. First ignition needle; 10. Second ignition needle. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0056] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] Figure 1 This is a schematic diagram of an equivalent circuit of two thermocouples connected in parallel in the related art, such as Figure 1 As shown, in the related art, in two thermocouples connected in parallel, the positive pole of one thermocouple is connected to the negative pole of the other thermocouple, and the positive and negative directions of the potential difference generated by the two after being heated are opposite. When the gas is burning normally, the thermocouple close to the nozzle will contact the flame and generate a potential difference, while the thermocouple far from the nozzle will not contact the flame and will not generate a potential difference; at this time, the thermocouple far from the nozzle will not offset the potential difference generated by the thermocouple close to the nozzle, and the potential difference at both ends of the intake valve coil is equal to the potential difference generated by the thermocouple close to the nozzle. The intake valve is opened and the heater can be ventilated and used normally. When the gas is burning abnormally, the thermocouple far from the nozzle will also be released from the flame and generate a potential difference; at this time, the potential difference generated by the thermocouple far from the nozzle offsets the potential difference generated by the thermocouple close to the nozzle, and there is no potential difference at both ends of the intake valve coil. The intake valve is closed and the heater cannot be ventilated and used.

[0058] However, since the flame length during gas combustion is difficult to control, when the gas is burning normally, the thermocouple far away from the nozzle may also come into contact with the flame and generate a certain potential difference, thereby offsetting part of the potential difference generated by the thermocouple close to the nozzle, resulting in the potential difference between the two turns of the intake valve coil being unable to meet the potential difference requirement for opening the intake valve. At this time, the intake valve cannot be opened, causing the heater to fail to work normally.

[0059] As described in the background technology above, in the related art, two thermocouples arranged in parallel are used to detect the combustion condition of the gas. Due to the superposition of the potential difference of the thermocouples when the gas is burning normally, there will be a misjudgment of the combustion condition, resulting in the problem that the heater cannot be used normally. Therefore, there is a problem that the heater cannot be used normally due to the misjudgment of the combustion condition.

[0060] In addition, in the related technology, a pressure check valve is usually used to detect the intake pressure and the type of gas connected. The valve is closed when the intake pressure is detected to be greater than or less than the specified pressure range. However, when the gas is connected normally and the low fire is adjusted, the intake pressure will increase due to the smaller outlet hole. At this time, the intake pressure may exceed the maximum value of the pressure range, causing the pressure check valve to misjudge the type of gas connected and mistakenly close the valve, resulting in the heater not being able to be used normally.

[0061] Based on this, an embodiment of the present invention provides a control system and method for a heater, which determines the current fuel type by combining the combustion conditions detected by the first thermocouple and the second thermocouple, and determines the current air intake port by combining the air intake conditions detected by the first microswitch and the second microswitch, thereby being able to accurately judge whether the heater is correctly connected to the gas and whether the fuel is normally fueled, and based on this, controls the action of the solenoid valve to ensure accurate control of the solenoid valve, ensure safe combustion of the gas, and ensure normal use of the heater.

[0062] Combine the following Figures 2 to 6 , describing an embodiment of the present invention.

[0063] According to an embodiment of the present invention, in one aspect, a control system for a heater is provided. Figure 2 is a schematic diagram of a control system of a heater according to an embodiment of the present invention. Figure 2 As shown, the system includes: a first air intake pipeline 1 and a second air intake pipeline 2. The first air intake pipeline 1 and the second air intake pipeline 2 correspond to fuel types one by one, that is, the first air intake pipeline 1 and the second air intake pipeline 2 correspond to different fuel types respectively; at the same time, the required pressure corresponding to the fuel type corresponding to the first air intake pipeline 1 is greater than the required pressure corresponding to the fuel type corresponding to the second air intake pipeline 2. Exemplarily, the fuel type corresponding to the first air intake pipeline 1 may be propane gas, and the fuel type corresponding to the second air intake pipeline 2 may be natural gas, which is not specifically limited here.

[0064] In the embodiment of the present invention, the first air intake pipeline 1 and the second air intake pipeline 2 both have a first air outlet 3 and a second air outlet 4, that is, the first air intake pipeline 1 and the second air intake pipeline 2 share the first air outlet 3 and the second air outlet 4, and the fuel connected from the first air intake pipeline 1 or the second air intake pipeline 2 can be output to the first air outlet 3 and the second air outlet 4.

[0065] In the embodiment of the present invention, a first thermocouple 5 is provided at the first air outlet 3, and the first thermocouple 5 is used to detect the combustion condition of the fuel at the first air outlet 3. A second thermocouple 6 is provided at the second air outlet 4, and the second thermocouple 6 is used to detect the combustion condition of the fuel at the second air outlet 4. Combining the detection results of the first thermocouple 5 and the second thermocouple 6 on the combustion condition, the current fuel type can be determined.

[0066] In the embodiment of the present invention, Figure 3 yes Figure 2 The bottom structure diagram of part A is as follows: Figure 3 As shown, the system further includes a first micro switch 11 and a second micro switch 21. The first micro switch 11 is arranged on the first air intake line 1, and the first micro switch 11 is used to detect the air intake condition of the first air intake line 1; the second micro switch 21 is arranged on the second air intake line 2, and the second micro switch 21 is used to detect the air intake condition of the second air intake line 2. Combining the detection results of the first micro switch 11 and the second micro switch 21 on the air intake condition, the current air intake port can be determined.

[0067] In the embodiment of the present invention, the system further includes a controller 7. The controller 7 is respectively connected to the first micro switch 11, the second micro switch 21, the first thermocouple 5, the second thermocouple 6 and the solenoid valve 8. The controller 7 is used to determine the current air inlet based on the detection results of the first micro switch 11 and the second micro switch 21, determine the current fuel based on the detection results of the first thermocouple 5 and the second thermocouple 6, and control the action of the solenoid valve 8 based on the current air inlet and the current fuel; the solenoid valve 8 is used to control the combustion of the fuel at the first air outlet 3 and the second air outlet 4. Specifically, when the solenoid valve 8 is opened, the fuel input from the first air intake pipeline 1 or the second air intake pipeline 2 can flow normally to the first air outlet 3 and the second air outlet 4, and the fuel at the first air outlet 3 and the second air outlet 4 can burn normally; when the solenoid valve 8 is closed, the fuel flow between the first air intake pipeline 1 and the second air intake pipeline 2 to the first air outlet 3 and the second air outlet 4 is cut off, and the fuel input from the first air intake pipeline 1 or the second air intake pipeline 2 cannot flow to the first air outlet 3 and the second air outlet 4, and the fuel at the first air outlet 3 and the second air outlet 4 cannot burn normally.

[0068] In one embodiment, Figure 2 and Figure 3 As shown, the first air inlet 1 includes a first air inlet 12, and a first micro switch 11 is arranged at the first air inlet 12. The first micro switch 11 is triggered when the first air inlet 12 is connected to fuel, and the first sensing signal detected by the first micro switch 11 is at a high level, thereby indicating that the first air inlet 12 is connected to fuel; when the first air inlet 12 is not connected to fuel, the first micro switch 11 will not be triggered, and the first sensing signal detected by the first micro switch 11 is at a low level, thereby indicating that the first air inlet 12 is not connected to fuel.

[0069] In one embodiment, Figure 2 and Figure 3As shown, the second air inlet line 2 includes a second air inlet 22, and a second micro switch 21 is arranged at the second air inlet 22. The second micro switch 21 is triggered when the second air inlet 22 is connected to fuel, and at this time, the second sensing signal detected by the second micro switch 21 switches from a low level to a high level, thereby indicating that the second air inlet 22 is connected to fuel; when the second air inlet 22 is not connected to fuel, the second micro switch 21 will not be triggered, and at this time, the second sensing signal detected by the second micro switch 21 is a low level, thereby indicating that the second air inlet 22 is not connected to fuel.

[0070] In one embodiment, Figure 2 As shown, a first pressure stabilizing valve 13 is provided at the first air inlet 12, and the first pressure stabilizing valve 13 is used to adjust the pressure of the first air inlet 12 to ensure that the pressure in the first air inlet pipeline 1 is in a stable state. The pressure adjustment range of the first pressure stabilizing valve 13 is consistent with the pressure range required by the fuel type corresponding to the first air inlet pipeline 1, thereby ensuring that the fuel corresponding to the first air inlet pipeline 1 can be normally output to the first air outlet 3 or the second air outlet 4 when connected to the first air inlet pipeline 1.

[0071] In one embodiment, Figure 2 As shown, a second pressure stabilizing valve 23 is provided at the second air inlet 22, and the second pressure stabilizing valve 23 is used to adjust the pressure of the second air inlet 22 to ensure that the pressure in the second air inlet pipeline 2 is in a stable state. The pressure adjustment range of the second pressure stabilizing valve 23 is consistent with the pressure range required by the fuel type corresponding to the second air inlet pipeline 2, thereby ensuring that the fuel corresponding to the second air inlet pipeline 2 can be normally output to the first air outlet 3 or the second air outlet 4 when connected to the second air inlet pipeline 2.

[0072] In one embodiment, Figure 2 As shown, a first ignition needle 9 is provided between the first air outlet 3 and the first thermocouple 5, and a second ignition needle 10 is provided between the second air outlet 4 and the second thermocouple 6. The first ignition needle 9 is used to ignite the fuel output from the first air outlet 3, and accordingly, the first thermocouple 5 is used to contact the flame generated by the ignition of the first ignition needle 9; the second ignition needle 10 is used to ignite the fuel output from the second air outlet 4, and accordingly, the second thermocouple 6 is used to contact the flame generated by the ignition of the second ignition needle 10.

[0073] Specifically, the first ignition needle 9 ignites the fuel output from the first air outlet 3 to generate a flame, and the first thermocouple 5 contacts the generated flame, thereby generating a potential difference at both ends of the first thermocouple 5, so that the first voltage detection signal detected by the first thermocouple 5 switches to a high level, thereby indicating that the first air outlet 3 is burning normally; the second ignition needle 10 ignites the fuel output from the second air outlet 4 to generate a flame, and the second thermocouple 6 contacts the generated flame, thereby generating a potential difference at both ends of the second thermocouple 6, so that the second voltage detection signal detected by the second thermocouple 6 switches to a high level, thereby indicating that the second air outlet 4 is burning normally.

[0074] In one embodiment, the system further includes an ignition switch, which is respectively connected to the first ignition needle 9 and the second ignition needle 10. When the user triggers the ignition switch, the first ignition needle 9 generates an electric spark to ignite the fuel output from the first gas outlet 3, and the second ignition needle 10 generates an electric spark to ignite the fuel output from the second gas outlet 4.

[0075] In one embodiment, the first air inlet pipeline 1 and the second air inlet pipeline 2 are respectively connected to the air outlet pipeline, and the air outlet pipeline is respectively connected to the first air outlet 3 and the second air outlet 4. At the same time, the air outlet pipeline is also connected to the solenoid valve 8, which opens or cuts off the flow of fuel in the air outlet pipeline according to the instruction of the controller 7, thereby controlling the combustion of the fuel at the first air outlet 3 and the second air outlet 4.

[0076] The control system of the heater of the present invention, on the one hand, outputs the fuel connected from the first air inlet pipeline or the second air inlet pipeline to the first air outlet and / or the second air outlet through the first air inlet pipeline and the second air inlet pipeline sharing the first air outlet and the second air outlet, and at the same time, the first thermocouple arranged at the first air outlet and the second thermocouple arranged at the second air outlet respectively detect the combustion conditions at the first air outlet and the second air outlet, so as to determine the current fuel in combination with the combustion conditions at the first air outlet and the second air outlet; on the other hand, by arranging a first micro- A micro switch is provided on the second air intake pipeline, and a second micro switch is provided on the second air intake pipeline to detect the air intake conditions of the first air intake pipeline and the second air intake pipeline respectively, so as to determine the current air intake port; thereby, the current fuel type is determined in combination with the combustion conditions detected by the first thermocouple and the second thermocouple, and the current air intake port is determined in combination with the air intake conditions detected by the first micro switch and the second micro switch, so as to accurately judge whether the heater is correctly connected to the gas and whether the fuel is normally fueled, and based on this, the action of the solenoid valve is controlled to ensure accurate control of the solenoid valve, ensure safe combustion of the gas, and normal use of the heater.

[0077] According to an embodiment of the present invention, on the other hand, a method for controlling a heater is provided. The method can be applied to the control system of the heater as described above. Figure 4is a flow chart of a method for controlling a heater according to an embodiment of the present invention. Figure 4 As shown, the method may include the following steps:

[0078] Step 410: respectively obtain a first sensing signal value of the first micro switch 11 and a second sensing signal value of the second micro switch 21, and determine the current air inlet based on the first sensing signal value and the second sensing signal value.

[0079] In the embodiment of the present invention, the first micro switch 11 detects the air intake condition of the first air intake pipeline 1 to obtain a first sensing signal; different signal values ​​of the first sensing signal reflect different air intake conditions of the first air intake pipeline 1. The second micro switch 21 detects the air intake condition of the second air intake pipeline 2 to obtain a second sensing signal; different signal values ​​of the second sensing signal reflect different air intake conditions of the second air intake pipeline 2.

[0080] In the embodiment of the present invention, based on the first sensing signal value and the second sensing signal value, the air intake conditions of the first air intake pipeline 1 and the second air intake pipeline 2 can be determined, thereby determining whether the current air intake pipeline is the first air intake pipeline 1 or the second air intake pipeline 2. If the current air intake pipeline is the first air intake pipeline 1, it indicates that the current air intake port is the first air intake port 12; if the current air intake pipeline is the second air intake pipeline 2, it indicates that the current air intake port is the second air intake port 22.

[0081] Step 420: respectively obtain a first voltage signal value of the first thermocouple 5 and a second voltage signal value of the second thermocouple 6, and determine the current fuel type based on the first voltage signal value and the second voltage signal value.

[0082] In the embodiment of the present invention, the first thermocouple 5 outputs a corresponding first voltage signal based on the potential difference between its two ends; different signal values ​​of the first voltage signal reflect different combustion conditions of the first gas outlet 3. The second thermocouple 6 outputs a corresponding second voltage signal based on the potential difference between its two ends; different signal values ​​of the second voltage signal reflect different combustion conditions of the second gas outlet 4.

[0083] In the embodiment of the present invention, after different types of fuel are connected to the first air inlet 12 or the second air inlet 22, different combustion conditions are generated at the first air outlet 3 and the second air outlet 4; accordingly, the combustion conditions of the first air outlet 3 and the second air outlet 4 are determined in combination with the first voltage signal value and the second voltage signal value, and compared with the combustion conditions corresponding to various fuel types, the current fuel type connected to the heater can be determined.

[0084] Step 430: Based on the current air intake port and the current fuel type, control the action of the solenoid valve 8.

[0085] In the embodiment of the present invention, since the first air inlet 12 and the second air inlet 22 have their corresponding fuel types respectively, only when the fuel of the corresponding fuel type is connected to the air inlet pipe, can it be considered that the air inlet pipe is correctly connected to the fuel. Only then is the heater allowed to work to ensure the safe combustion of the gas and the normal use of the heater.

[0086] Specifically, if the fuel type corresponding to the current air inlet is consistent with the current fuel type, it is considered that the fuel is correctly connected to the air inlet pipe at this time, so the solenoid valve 8 is controlled to open at this time to allow the fuel in the pipeline to flow normally and the heater to work normally. If the fuel type corresponding to the current air inlet is inconsistent with the current fuel type, it is considered that the fuel is incorrectly connected to the air inlet pipe at this time, so the solenoid valve 8 is controlled to close at this time to cut off the flow of fuel in the pipeline and the heater stops working.

[0087] In one embodiment, in the above step 410, different air intake conditions of the first air inlet 12 of the first air intake pipeline 1 trigger different conditions of the first micro switch 11, so that the signal value of the first sensing signal detected by the first micro switch 11 is different under different air intake conditions. Specifically, if the first air inlet 12 of the first air intake pipeline 1 is connected to the fuel to trigger the first micro switch 11, the first sensing signal is at a high level, and the first sensing signal value obtained by the controller 7 is a first preset value; if the first air inlet 12 is not connected to the fuel, the first micro switch 11 is not triggered at this time, the first sensing signal is at a low level, and the first sensing signal value obtained by the controller 7 is a second preset value. Among them, the first preset value is the digital signal value corresponding to the high level, that is, 1; the second preset value is the digital signal value corresponding to the low level, that is, 0.

[0088] In one embodiment, in the above step 410, different air intake conditions of the second air inlet 22 of the second air intake pipeline 2 trigger different conditions of the second micro switch 21, so that the signal value of the second sensing signal detected by the second micro switch 21 is different under different air intake conditions. Specifically, if the second air inlet 22 of the second air intake pipeline 2 is connected to the fuel to trigger the second micro switch 21, the first sensing signal is at a high level, and the second sensing signal value obtained by the controller 7 at this time is the first preset value; if the second air inlet 22 is not connected to the fuel, the second micro switch 21 is not triggered at this time, the second sensing signal is at a low level, and the second sensing signal value obtained by the controller 7 is the second preset value.

[0089] In one embodiment, Figure 5 is a flow chart of determining the current air inlet in a method for controlling a heater according to an embodiment of the present invention. Figure 5As shown, considering that the different first sensing signal values ​​and the second sensing signal values ​​correspond to different air intake conditions, in the above step 410, determining the current air intake port based on the first sensing signal value and the second sensing signal value may include the following steps:

[0090] Step 510 : If the first sensing signal value is the first preset value, and the second sensing signal value is the second preset value, then determine that the current air inlet is the first air inlet 12 .

[0091] In the embodiment of the present invention, if the first sensing signal value is the first preset value, it indicates that the first micro switch 11 is triggered, and fuel is connected to the first air intake pipe 1; if the second sensing signal value is the second preset value, it indicates that the second micro switch 21 is not triggered, and fuel is not connected to the second air intake pipe 2. Therefore, it can be determined that the current air intake port is the first air intake port 12.

[0092] Step 520 : If the second sensing signal value is the first preset value, and the first sensing signal value is the second preset value, then determine that the current air inlet is the second air inlet 22 .

[0093] In the embodiment of the present invention, if the second sensing signal value is the first preset value, it indicates that the second micro switch 21 is triggered, and fuel is connected to the second air intake pipe 2; if the first sensing signal value is the second preset value, it indicates that the first micro switch 11 is not triggered, and fuel is not connected to the first air intake pipe 1. Therefore, it can be determined that the current air intake port is the second air intake port 22.

[0094] In one embodiment, since the heater is usually connected to only one air inlet, or only one air inlet is connected to fuel at the same time, the first sensing signal value and the second sensing signal value are usually not the first preset value at the same time. If the first sensing signal value and the second sensing signal value are both the first preset value, it indicates that the heater is faulty, or there is a problem with the connection between the heater and the air supply pipeline or the fuel supply, so the solenoid valve 8 is controlled to be closed at this time.

[0095] In one embodiment, if the first sensing signal value and the second sensing signal value are both second preset values, it indicates that no fuel is currently connected to the first air intake pipeline 1 and the second air intake pipeline 2, and the heater is not working.

[0096] In one embodiment, in the above step 420, when the first thermocouple 5 and the second thermocouple 6 are in contact with the flame, the potential difference at both ends thereof will change, thereby causing the first voltage signal value of the first thermocouple 5 and the second voltage signal value at both ends of the second thermocouple 6 to change. Therefore, the controller 7 detects and obtains the potential difference at both ends of the first thermocouple 5 and the potential difference at both ends of the second thermocouple 6 in real time, thereby determining the first voltage signal value of the first thermocouple based on the potential difference at both ends of the first thermocouple 5, and determining the second voltage signal value of the second thermocouple based on the potential difference at both ends of the second thermocouple 6.

[0097] In one embodiment, in the above step 420, different combustion conditions of the first air outlet 3 will cause different potential differences to be generated at both ends of the first thermocouple 5, so that the signal value of the first voltage signal detected by the first thermocouple 5 is different under different combustion conditions. Specifically, if the potential difference at both ends of the first thermocouple 5 is greater than the preset potential difference, it indicates that the first thermocouple 5 is in contact with the flame, and the first voltage signal is at a high level. At this time, the first voltage signal value obtained by the controller 7 is a third preset value; if the potential difference at both ends of the first thermocouple 5 is less than the preset potential difference, it indicates that the first thermocouple 5 is not in contact with the flame, or the flame length does not reach the flame length of normal combustion, and the first voltage signal is at a low level. At this time, the first voltage signal value obtained by the controller 7 is a fourth preset value. Among them, the preset potential difference is the potential difference generated at both ends of the thermocouple when it contacts the flame corresponding to normal combustion; the third preset value and the above-mentioned first preset value are both signal values ​​corresponding to the high level, and the third preset value and the first preset value can take the same value, for example, both are 1; the fourth preset value and the above-mentioned second preset value are both signals corresponding to the low level, and the fourth preset value and the second preset value can take the same value, for example, both are 0.

[0098] In one embodiment, in the above step 420, different combustion conditions of the second air outlet 4 will cause different potential differences to be generated at both ends of the second thermocouple 6, so that the signal value of the second voltage signal detected by the second thermocouple 6 is different under different combustion conditions. Specifically, if the potential difference at both ends of the second thermocouple 6 is greater than the preset potential difference, it indicates that the second thermocouple 6 is in contact with the flame, and the second voltage signal is at a high level. At this time, the second voltage signal value obtained by the controller 7 is a third preset value; if the potential difference at both ends of the second thermocouple 6 is less than the preset potential difference, it indicates that the second thermocouple 6 is not in contact with the flame, or the flame length does not reach the flame length of normal combustion, and the second voltage signal is at a low level. At this time, the second voltage signal value obtained by the controller 7 is a fourth preset value.

[0099] In one embodiment, Figure 6 FIG. 1 is a flow chart of determining the current fuel type in a method for controlling a heater according to an embodiment of the present invention. Figure 6As shown, considering the different first voltage signal values ​​and second voltage signal values, in the above step 420, determining the current fuel type based on the first voltage signal value and the second voltage signal value may include the following steps:

[0100] Step 610: If the first voltage signal value and the second voltage signal value are both the third preset value, it is determined that the current fuel type is the first type.

[0101] In the embodiment of the present invention, the first type is consistent with the fuel type corresponding to the first air inlet 12. For example, if the first air inlet 12 is a propane air inlet, that is, the fuel type corresponding to the first air inlet 12 is propane gas, then the first type is propane gas.

[0102] In the embodiment of the present invention, if the first voltage signal value and the second voltage signal value are both the third preset value, it indicates that the combustion conditions of the first air outlet 3 and the second air outlet 4 are both normal combustion. At this time, it can be determined that the current fuel type is the first type corresponding to the first air inlet 12.

[0103] Step 620: If the first voltage signal value and the second voltage signal value are not equal, determine that the current fuel type is the second type.

[0104] In the embodiment of the present invention, the second type is consistent with the fuel type corresponding to the second air inlet 22. For example, if the second air inlet 22 is a natural gas inlet, that is, the fuel type corresponding to the second air inlet 22 is natural gas gas, then the second type is natural gas gas.

[0105] In an embodiment of the present invention, if the first voltage signal value and the second voltage signal value are not equal, that is, the first voltage signal value is the third preset value and the second voltage signal value is the fourth preset value, or the second voltage signal value is the fourth preset value and the second voltage signal value is the third preset value, then it indicates that the combustion condition of only one of the first air outlet 3 and the second air outlet 4 is normal combustion. At this time, it can be determined that the current fuel type is the second type corresponding to the second air inlet 22.

[0106] In one embodiment, if the first voltage signal value and the second voltage signal value are both the fourth preset value, it indicates that the first air outlet 3 and the second air outlet 4 are not burning normally. At this time, if the first sensing signal is the first preset value or the second sensing signal is the first preset value, that is, the first air intake pipe 1 or the second air intake pipe 2 is connected to fuel, it indicates that there is a problem with the flow of fuel in the heater at this time, that is, the heater may be faulty; if the first sensing signal and the second sensing signal are both the second preset value, that is, the first air intake pipe 1 and the second air intake pipe 2 are not connected to fuel, it indicates that fuel is not input to the heater at this time, and the heater is not working.

[0107] In the embodiment of the present invention, since the demand pressure corresponding to the fuel type corresponding to the first intake pipe 1, that is, the first type of fuel, is greater than the demand pressure corresponding to the fuel type corresponding to the second intake pipe 2, that is, the second type of fuel, the first type of fuel can be normally output to the first air outlet 3 and the second air outlet 4 regardless of which intake pipe it is connected to, so that the first air outlet 3 and the second air outlet 4 can both burn normally, while the second type of fuel can only be normally output to one of the first air outlet 3 and the second air outlet 4, so that only one air outlet can burn normally.

[0108] Specifically, Table 1 is a schematic table of induction signal values ​​and voltage signal values ​​under different fuel connection conditions; in Table 1, the first preset value and the third preset value are both 1; the second preset value and the fourth preset value are both 0.

[0109] Table 1

[0110]

[0111] As shown in Table 1, for the first type of fuel, no matter which air inlet pipe is connected, the first air outlet 3 and the second air outlet 4 can burn normally; corresponding to Table 1, that is, when the fuel type is the first type, whether the first sensing signal value of the first microswitch 11 is 1 or the second sensing signal value of the second microswitch 21 is 1, the first voltage signal value of the first thermocouple 5 and the second voltage signal value of the second thermocouple 6 are both 1. For the second type of fuel, no matter which air inlet pipeline it is connected to, only one of the first air outlet 3 and the second air outlet 4 can burn normally; specifically, when the second type of fuel is connected to the first air inlet pipeline 1, that is, the first sensing signal value of the first microswitch 11 is 1, the first air outlet 3 cannot burn normally, and the first voltage signal value of the first thermocouple 5 is 0, the second air outlet 4 can burn normally, and the second voltage signal value of the second thermocouple 6 is 1; when the second type of fuel is connected to the second air inlet pipeline 2, that is, the second sensing signal value of the second microswitch 21 is 1, the second air outlet 4 cannot burn normally, the second voltage signal value of the second thermocouple 6 is 0, the first air outlet 3 can burn normally, and the first voltage signal value of the first thermocouple 5 is 1.

[0112] In one embodiment, as described in Table 1, in order to control the heater to work only when the intake pipe is connected to the fuel of the corresponding fuel type and ensure the safe combustion of the gas, when the fuel type is the first type, the solenoid valve 8 is controlled to open only when the first sensing signal value, the first voltage signal value and the second voltage signal value are all 1, and the second sensing signal value is 0, that is, the solenoid valve 8 is opened only when the first intake pipe 1 is connected to the first type of fuel, and the first air outlet 3 and the second air outlet 4 can burn normally, so that the heater works. When the fuel type is the second type, the solenoid valve 8 is controlled to open only when the second sensing signal value and the first voltage signal value are 1, and the first sensing signal value and the second voltage signal value are 0, that is, the solenoid valve 8 is opened only when the second intake pipe 2 is connected to the second type of fuel, and the first air outlet 3 can burn normally, so that the heater works.

[0113] The control method of the heater of the present invention, on the one hand, represents the detection result of the first micro switch on the air intake condition of the first air intake pipe through the first sensing signal value, and represents the detection result of the second micro switch on the air intake condition of the second air intake pipe through the second sensing signal value, so that the current air intake port can be correctly judged according to the first sensing signal value and the second sensing signal value; on the other hand, represents the detection result of the first thermocouple on the combustion condition of the first air outlet through the first voltage signal value, and represents the detection result of the second thermocouple on the combustion condition of the second air outlet through the second voltage signal value, so that the current fuel type can be correctly judged according to the first voltage signal value and the second voltage signal value; thereby, it is possible to accurately judge whether the heater is correctly connected to the gas and whether the fuel is normally fueled, and based on this, the action of the solenoid valve is controlled to ensure accurate control of the solenoid valve, ensure safe combustion of the gas, and ensure normal use of the heater.

[0114] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The specific contents of the above specific implementations only express several implementations of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A control system for a heater, characterized in that: include: A first air intake pipeline (1) and a second air intake pipeline (2), wherein the first air intake pipeline (1) and the second air intake pipeline (2) correspond to fuel types one by one, the first air intake pipeline (1) and the second air intake pipeline (2) both have a first air outlet (3) and a second air outlet (4), a first thermocouple (5) is provided at the first air outlet (3), and a second thermocouple (6) is provided at the second air outlet (4); A first micro switch (11), arranged on the first air intake pipeline (1); A second micro switch (21), arranged on the second air intake pipeline (2); A controller (7) is connected to the first micro switch (11), the second micro switch (21), the first thermocouple (5), the second thermocouple (6) and the solenoid valve (8) respectively; The controller (7) is used to determine the current air inlet based on the detection results of the first microswitch (11) and the second microswitch (21), determine the current fuel type based on the detection results of the first thermocouple (5) and the second thermocouple (6), and control the action of the solenoid valve (8) based on the current air inlet and the current fuel type.

2. The system according to claim 1, characterized in that The first air intake pipeline (1) comprises a first air intake port (12); the first micro switch (11) is arranged at the first air intake port (12), and the first micro switch (11) is triggered when the first air intake port (12) is connected to fuel; The second air intake pipeline (2) comprises a second air intake port (22); the second micro switch (21) is arranged at the second air intake port (22), and the second micro switch (21) is triggered when the second air intake port (22) is connected to fuel.

3. The system according to claim 1, characterized in that A first ignition needle (9) is arranged between the first air outlet (3) and the first thermocouple (5), and a second ignition needle (10) is arranged between the second air outlet (4) and the second thermocouple (6); The first ignition needle (9) is used to ignite the fuel output from the first gas outlet (3), and the first thermocouple (5) is used to contact the flame generated by the ignition of the first ignition needle (9); The second ignition needle (10) is used to ignite the fuel output from the second gas outlet (4), and the second thermocouple (6) is used to contact the flame generated by the ignition of the second ignition needle (10).

4. The system according to claim 1, characterized in that The first air inlet pipeline (1) and the second air inlet pipeline (2) are respectively connected to air outlet pipelines, and the air outlet pipelines are respectively connected to the first air outlet (3) and the second air outlet (4).

5. A method for controlling a heater, characterized in that: Applied to a control system of a heater as claimed in any one of claims 1 to 4, the method comprises: Respectively acquiring a first sensing signal value of the first micro switch (11) and a second sensing signal value of the second micro switch (21), and determining a current air inlet based on the first sensing signal value and the second sensing signal value; Respectively acquiring a first voltage signal value of the first thermocouple (5) and a second voltage signal value of the second thermocouple (6), and determining a current fuel type based on the first voltage signal value and the second voltage signal value; Based on the current air intake and the current fuel type, the actuation of the solenoid valve (8) is controlled.

6. The method according to claim 5, characterized in that The step of respectively acquiring the first sensing signal value of the first micro switch (11) and the second sensing signal value of the second micro switch (21) comprises: If the first air inlet (12) of the first air inlet pipeline (1) is connected to fuel to trigger the first micro switch (11), the first sensing signal value obtained is a first preset value; If the first air inlet (12) is not connected to fuel, the first sensing signal value obtained is a second preset value; If the second air inlet (22) of the second air inlet pipeline (2) is connected to fuel to trigger the second micro switch (21), the second sensing signal value obtained is the first preset value; If the second air inlet (22) is not connected to fuel, the acquired second sensing signal value is the second preset value.

7. The method according to claim 6, characterized in that The determining the current air inlet based on the first sensing signal value and the second sensing signal value includes: If the first sensing signal value is a first preset value, and the second sensing signal value is a second preset value, determining that the current air inlet is a first air inlet (12); If the second sensing signal value is the first preset value, and the first sensing signal value is the second preset value, it is determined that the current air inlet is the second air inlet (22).

8. The method according to claim 5, characterized in that The step of respectively acquiring a first voltage signal value of the first thermocouple (5) and a second voltage signal value of the second thermocouple (6) comprises: Respectively obtaining the potential difference between the two ends of the first thermocouple (5) and the potential difference between the two ends of the second thermocouple (6); If the potential difference between the two ends of the first thermocouple (5) is greater than the preset potential difference, the first voltage signal value obtained is a third preset value; If the potential difference between the two ends of the first thermocouple (5) is less than the preset potential difference, the first voltage signal value obtained is a fourth preset value; If the potential difference between the two ends of the second thermocouple (6) is greater than the preset potential difference, the acquired second voltage signal value is the third preset value; If the potential difference between the two ends of the second thermocouple (6) is less than the preset potential difference, the acquired second voltage signal value is the fourth preset value.

9. The method according to claim 8, characterized in that The determining the current fuel type based on the first voltage signal value and the second voltage signal value includes: If the first voltage signal value and the second voltage signal value are both third preset values, it is determined that the current fuel type is the first type; the first type is consistent with the fuel type corresponding to the first air inlet (12); If the first voltage signal value and the second voltage signal value are not equal, it is determined that the current fuel type is the second type; the second type is consistent with the fuel type corresponding to the second air inlet (22).

10. The method according to claim 5, characterized in that The action of controlling the solenoid valve (8) based on the current air intake port and the current fuel type comprises: If the fuel type corresponding to the current air inlet is consistent with the current fuel type, controlling the solenoid valve (8) to open; If the fuel type corresponding to the current air intake port is inconsistent with the current fuel type, the solenoid valve (8) is controlled to be closed.

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