Control system and method for heater

Abstract

The present application relates to a gas-fired apparatus, and discloses a control system and method for a heater. The present application comprises: a first gas inlet pipeline and a second gas inlet pipeline, both the first gas inlet pipeline and the second gas inlet pipeline having a first gas outlet and a second gas outlet, a first thermocouple being provided at the first gas outlet, and a second thermocouple being provided at the second gas outlet; a first micro switch arranged on the first gas inlet pipeline; a second micro switch arranged on the second gas inlet pipeline; and a controller connected to each of the first micro switch, the second micro switch, the first thermocouple, the second thermocouple, and a solenoid valve. The current fuel type is determined based on the combustion conditions detected by the first thermocouple and the second thermocouple, and the current gas inlet is determined based on the gas intake conditions detected by the first micro switch and the second micro switch. This enables accurate determination on whether the heater is connected to the correct gas supply and whether the fuel is combusting normally. On this basis, the action of the solenoid valve is controlled, thereby ensuring the accurate control of the solenoid valve, the safe combustion of the fuel gas, and the normal operation of the heater.

Description

Control system and method of a heater

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411371258.2, filed on September 29, 2024, and entitled "Control system and method of a heater", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of gas equipment, in particular to a control system and method of a heater. BACKGROUND

[0004] At present, the multi-fuel heater mainly detects whether the gas is normally combusted by detecting the flame at the time of ignition through two thermocouples arranged in parallel at the nozzle. In the two thermocouples, the positive electrode of one thermocouple is connected with the negative electrode of the other thermocouple. When combusting normally, the thermocouple close to the nozzle will contact the flame to generate a potential difference, and the thermocouple away from the nozzle will not contact the flame to not generate a potential difference. At this time, the potential difference generated by the two thermocouples after superposition can open the valve, and the heater works normally. However, due to the difficulty in controlling the length of the flame, when combusting normally, the thermocouple away from the nozzle may also contact the flame to generate a certain potential difference, resulting in that the potential difference generated by the two thermocouples after superposition is not enough to open the valve, and thus the heater cannot work normally. Therefore, there is a problem that the misjudgment of the combustion condition causes the heater to not work normally. SUMMARY

[0005] The first technical problem solved by the present application is to provide a control system of a heater, which effectively solves the problem that the misjudgment of the combustion condition causes the heater to not work normally.

[0006] The second technical problem solved by the present application is to provide a control method of a heater, which effectively solves the problem that the misjudgment of the combustion condition causes the heater to not work normally.

[0007] The first technical problem is solved by the following technical scheme:

[0008] A control system of a heater, comprising:

[0009] A first air inlet pipeline and a second air inlet pipeline, the first air inlet pipeline and the second air inlet pipeline correspond to a fuel type one by one, and the first air inlet pipeline and the second air inlet pipeline each have a first air outlet and a second air outlet, the first air outlet is provided with a first thermocouple, and the second air outlet is provided with a second thermocouple;

[0010] A first micro switch is arranged on the first air inlet pipeline;

[0011] a second micro switch arranged on the second air inlet pipeline;

[0012] a controller connected with the first micro switch, the second micro switch, the first thermocouple, the second thermocouple and the electromagnetic valve respectively;

[0013] The controller is configured 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 electromagnetic valve based on the current air inlet and the current fuel type.

[0014] The control system of the warmer has the following beneficial effects compared with the background art. 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 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. The first thermocouple arranged at the first air outlet and the second thermocouple arranged at the second air outlet detect the combustion conditions at the first air outlet and the second air outlet respectively, 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, the first micro switch is arranged on the first air inlet pipeline, and the second micro switch is arranged on the second air inlet pipeline, so as to detect the air inlet conditions of the first air inlet pipeline and the second air inlet pipeline respectively, thereby determining the current air inlet. 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 inlet is determined in combination with the air inlet conditions detected by the first micro switch and the second micro switch, so as to accurately determine whether the warmer is correctly connected to the air inlet and whether the fuel is normal, and control the action of the electromagnetic valve based thereon, thereby ensuring accurate control of the electromagnetic valve, ensuring safe combustion of the gas and normal use of the warmer.

[0015] In one embodiment, the first air inlet pipeline comprises a first air inlet, and the first micro switch is arranged at the first air inlet and is triggered when the fuel is connected to the first air inlet.

[0016] The second air inlet pipeline comprises a second air inlet, and the second micro switch is arranged at the second air inlet and is triggered when the fuel is connected to the second air inlet.

[0017] In one embodiment, a first ignition needle is arranged between the first air outlet and the first thermocouple, and a second ignition needle is arranged between the second air outlet and the second thermocouple.

[0018] The first ignition needle is configured to ignite the fuel output from the first air outlet, and the first thermocouple is configured to contact the flame generated by the first ignition needle.

[0019] The second ignition needle is used for igniting the fuel output by the second gas outlet, and the second thermocouple is used for contacting the flame generated by the second ignition needle.

[0020] In one of the embodiments, the first air inlet pipeline and the second air inlet pipeline are respectively connected with the air outlet pipeline, and the air outlet pipeline is respectively connected with the first gas outlet and the second gas outlet.

[0021] The second technical problem is solved by the following technical solution:

[0022] A control method of a warmer, applied to the control system of any of the warmers described above, the method comprising:

[0023] The first sensing signal value of the first micro switch and the second sensing signal value of the second micro switch are respectively acquired, and based on the first sensing signal value and the second sensing signal value, the current air inlet is determined;

[0024] The first voltage signal value of the first thermocouple and the second voltage signal value of the second thermocouple are respectively acquired, and based on the first voltage signal value and the second voltage signal value, the current fuel type is determined;

[0025] Based on the current air inlet and the current fuel type, the action of the electromagnetic valve is controlled.

[0026] Compared with the background art, the control method of the warmer of the present application has the beneficial effects that: on the one hand, the first sensing signal value represents the detection result of the first micro switch on the air inlet condition of the first air inlet pipeline, and the second sensing signal value represents the detection result of the second micro switch on the air inlet condition of the second air inlet pipeline, so that according to the first sensing signal value and the second sensing signal value, the current air inlet can be correctly determined; on the other hand, the first voltage signal value represents the detection result of the first thermocouple on the combustion condition of the first gas outlet, and the second voltage signal value represents the detection result of the second thermocouple on the combustion condition of the second gas outlet, so that according to the first voltage signal value and the second voltage signal value, the current fuel type can be correctly determined; thus, whether the warmer is correctly connected to the gas and whether the fuel is normally combusted can be accurately determined, and based on this, the action of the electromagnetic valve is controlled, ensuring accurate control of the electromagnetic valve, ensuring safe combustion of the gas and normal use of the warmer.

[0027] In one of the embodiments, acquiring the first sensing signal value of the first micro switch and the second sensing signal value of the second micro switch respectively comprises:

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

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

[0030] If the second air inlet of the second air inlet pipeline is connected with the fuel, the second sensing signal value obtained is a first preset value;

[0031] If the second air inlet is not connected with the fuel, the second sensing signal value obtained is a second preset value.

[0032] In one of the embodiments, based on the first sensing signal value and the second sensing signal value, the current air inlet is determined, comprising:

[0033] If the first sensing signal value is the first preset value and the second sensing signal value is the second preset value, it is determined that the current air inlet is the first air inlet;

[0034] 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.

[0035] In one of the embodiments, the first voltage signal value of the first thermocouple and the second voltage signal value of the second thermocouple are obtained respectively, comprising:

[0036] The potential difference between the two ends of the first thermocouple and the potential difference between the two ends of the second thermocouple are obtained respectively;

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

[0038] If the potential difference between the two ends of the first thermocouple is less than the preset potential difference, the first voltage signal value obtained is a fourth preset value;

[0039] If the potential difference between the two ends of the second thermocouple is greater than the preset potential difference, the second voltage signal value obtained is the third preset value;

[0040] If the potential difference between the two ends of the second thermocouple is less than the preset potential difference, the second voltage signal value obtained is the fourth preset value.

[0041] In one of the embodiments, based on the first voltage signal value and the second voltage signal value, the current fuel type is determined, comprising:

[0042] 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 a first type; the first type is consistent with the fuel type corresponding to the first air inlet;

[0043] If the first voltage signal value and the second voltage signal value are not equal, it is determined that the current fuel type is a second type; the second type is consistent with the fuel type corresponding to the second air inlet.

[0044] In one of the embodiments, the action of the electromagnetic valve is controlled based on the current air inlet and the current fuel type, including:

[0045] If the fuel type corresponding to the current air inlet is consistent with the current fuel type, the electromagnetic valve is controlled to open;

[0046] If the fuel type corresponding to the current air inlet is inconsistent with the current fuel type, the electromagnetic valve is controlled to close. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0048] Fig. 1 is an equivalent circuit schematic diagram of two thermocouples in parallel in the related art;

[0049] Fig. 2 is a structural schematic diagram of a control system of a warmer according to an embodiment of the present application;

[0050] Fig. 3 is a bottom structural schematic diagram of part A in Fig. 2;

[0051] Fig. 4 is a flow schematic diagram of a control method of a warmer according to an embodiment of the present application;

[0052] Fig. 5 is a flow schematic diagram of determining a current air inlet in a control method of a warmer according to an embodiment of the present application;

[0053] Fig. 6 is a flow schematic diagram of determining a current fuel type in a control method of a warmer according to an embodiment of the present application.

[0054] Legend of reference numerals: 1, first air inlet pipeline; 11, first micro switch; 12, first air inlet; 13, first pressure stabilizing valve; 2, second air inlet pipeline; 21, second micro switch; 22, second air inlet; 23, second pressure stabilizing valve; 3, first air outlet; 4, second air outlet; 5, first thermocouple; 6, second thermocouple; 7, controller; 8, electromagnetic valve; 9, first ignition needle; 10, second ignition needle. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0056] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0057] In the description of the present application, it should be noted that unless otherwise specified and limited, the term "connection" should be understood broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0058] Figure 1 is an equivalent circuit schematic diagram of two thermocouples in parallel in the related art, as shown in Figure 1, in the related art, the positive electrode of one of the two thermocouples in parallel is connected with the negative electrode 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 normally burned, the thermocouple close to the nozzle will be in contact with the flame, generating a potential difference, and the thermocouple away from the nozzle will not be in contact with the flame, not generating a potential difference; At this time, the thermocouple away from the nozzle will not offset the potential difference generated by the thermocouple close to the nozzle, and the potential difference between the two ends of the inlet valve coil is equal to the potential difference generated by the thermocouple close to the nozzle, the inlet valve is opened, and the heater is normally ventilated. When the gas is not normally burned, the thermocouple away from the nozzle will also be in contact with the flame, generating a potential difference; At this time, the potential difference generated by the thermocouple away from the nozzle offsets the potential difference generated by the thermocouple close to the nozzle, and there is no potential difference between the two ends of the inlet valve coil, the inlet valve is closed, and the heater cannot be ventilated.

[0059] However, due to the difficulty in controlling the length of the flame when the gas is burned, when the gas is normally burned, the thermocouple away from the nozzle may also be in 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 that the potential difference between the two ends of the inlet valve coil cannot meet the requirement of the potential difference for opening the inlet valve, at this time the inlet valve cannot be opened, resulting in that the heater cannot work normally.

[0060] As described in the above background art, in the related art, two thermocouples arranged in parallel are used to detect the burning condition of the gas, due to the existence of the superposition of the potential difference of the thermocouple when the gas is normally burned, there will be a misjudgment of the burning condition, resulting in the problem that the heater cannot be used normally. Therefore, there is a problem of misjudgment of the burning condition, which leads to the problem that the heater cannot be used normally.

[0061] In addition, in the related art, a pressure detecting valve is usually used to detect the inlet gas pressure, and the type of the inlet gas is detected, and the valve is closed when the inlet gas pressure is greater than or less than a specified pressure range. However, when the normal gas is connected and the small fire is adjusted, the outlet hole becomes smaller, and the inlet gas pressure increases. At this time, the inlet gas pressure may exceed the maximum value of the pressure range, causing the pressure detecting valve to misjudge the type of the inlet gas and to close the valve, resulting in that the heater cannot be normally used.

[0062] Therefore, based on the above, the embodiments of the present application provide a control system and method of a heater, which determines the current fuel type in combination with the combustion conditions detected by the first thermocouple and the second thermocouple, and determines the current inlet port in combination with the inlet gas conditions detected by the first micro switch and the second micro switch, so as to accurately determine whether the heater is correctly connected to the gas and whether the fuel is normally burned, and to control the action of the electromagnetic valve based on the above, to ensure the accurate control of the electromagnetic valve, to ensure the safe combustion of the gas and the normal use of the heater.

[0063] The embodiments of the present application will be described below in combination with FIGS. 2 to 6.

[0064] According to the embodiments of the present application, in one aspect, a control system of a heater is provided. FIG. 2 is a structural schematic diagram of a control system of a heater according to an embodiment of the present application. As shown in FIG. 2, the system includes a first inlet pipe 1 and a second inlet pipe 2. The first inlet pipe 1 and the second inlet pipe 2 correspond to one fuel type respectively, that is, the first inlet pipe 1 and the second inlet pipe 2 correspond to different fuel types respectively. Meanwhile, the required pressure of the fuel type corresponding to the first inlet pipe 1 is greater than the required pressure of the fuel type corresponding to the second inlet pipe 2. For example, the fuel type corresponding to the first inlet pipe 1 can be propane gas, and the fuel type corresponding to the second inlet pipe 2 can be natural gas, which is not limited herein.

[0065] In the embodiments of the present application, the first inlet pipe 1 and the second inlet pipe 2 both have a first outlet 3 and a second outlet 4, that is, the first inlet pipe 1 and the second inlet pipe 2 share the first outlet 3 and the second outlet 4, and the fuel connected from the first inlet pipe 1 or the second inlet pipe 2 can be output to the first outlet 3 and the second outlet 4.

[0066] In the embodiments of the present application, a first thermocouple 5 is arranged at the first outlet 3, and the first thermocouple 5 is used to detect the combustion condition of the fuel at the first outlet 3. A second thermocouple 6 is arranged at the second outlet 4, and the second thermocouple 6 is used to detect the combustion condition of the fuel at the second outlet 4. The combustion conditions detected by the first thermocouple 5 and the second thermocouple 6 can be combined to determine the current fuel type.

[0067] In the embodiments of the present application, Fig. 3 is a schematic diagram of the bottom structure of part A in Fig. 2, as shown in Fig. 3, the system further comprises a first micro switch 11 and a second micro switch 21. The first micro switch 11 is arranged on the first air inlet pipeline 1 and is used to detect the air inlet condition of the first air inlet pipeline 1; the second micro switch 21 is arranged on the second air inlet pipeline 2 and is used to detect the air inlet condition of the second air inlet pipeline 2. The detection results of the first micro switch 11 and the second micro switch 21 can determine the current air inlet.

[0068] In the embodiments of the present application, the system further comprises a controller 7. The controller 7 is connected with the first micro switch 11, the second micro switch 21, the first thermocouple 5, the second thermocouple 6 and the electromagnetic valve 8 respectively. 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, to determine the current fuel based on the detection results of the first thermocouple 5 and the second thermocouple 6, and to control the action of the electromagnetic valve 8 based on the current air inlet and the current fuel; the electromagnetic 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 electromagnetic valve 8 is opened, the fuel input by the first air inlet pipeline 1 or the second air inlet pipeline 2 can normally 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 can be normally combusted; when the electromagnetic valve 8 is closed, the fuel flow between the first air inlet pipeline 1 and the second air inlet pipeline 2 and the first air outlet 3 and the second air outlet 4 is cut off, the fuel input by the first air inlet pipeline 1 or the second air inlet 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 be normally combusted.

[0069] In one embodiment, as shown in Fig. 2 and Fig. 3, the first air inlet pipeline 1 comprises a first air inlet 12, and the first micro switch 11 is arranged at the first air inlet 12. The first micro switch 11 is triggered when the fuel is connected to the first air inlet 12, at this time, the first sensing signal detected by the first micro switch 11 is high level, thereby indicating that the fuel is connected to the first air inlet 12; when the fuel is not connected to the first air inlet 12, the first micro switch 11 is not triggered, at this time, the first sensing signal detected by the first micro switch 11 is low level, thereby indicating that the fuel is not connected to the first air inlet 12.

[0070] In one embodiment, as shown in FIG. 2 and FIG. 3, the second air inlet pipe 2 comprises a second air inlet 22, and the second micro switch 21 is arranged at the second air inlet 22. When the second air inlet 22 is connected with fuel, the second micro switch 21 is triggered, and the second sensing signal detected by the second micro switch 21 is switched from low level to high level, thereby indicating that the second air inlet 22 is connected with fuel; when the second air inlet 22 is not connected with fuel, the second micro switch 21 is not triggered, and the second sensing signal detected by the second micro switch 21 is low level, thereby indicating that the second air inlet 22 is not connected with fuel.

[0071] In one embodiment, as shown in FIG. 2, the first air inlet 12 is provided with a first pressure stabilizing valve 13, which is used to adjust the pressure of the first air inlet 12, so as to ensure that the pressure in the first air inlet pipe 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 pipe 1, thereby ensuring that the fuel corresponding to the first air inlet pipe 1 can be normally output to the first air outlet 3 or the second air outlet 4 when the fuel is connected to the first air inlet pipe 1.

[0072] In one embodiment, as shown in FIG. 2, the second air inlet 22 is provided with a second pressure stabilizing valve 23, which is used to adjust the pressure of the second air inlet 22, so as to ensure that the pressure in the second air inlet pipe 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 pipe 2, thereby ensuring that the fuel corresponding to the second air inlet pipe 2 can be normally output to the first air outlet 3 or the second air outlet 4 when the fuel is connected to the second air inlet pipe 2.

[0073] In one embodiment, as shown in FIG. 2, the first air outlet 3 and the first thermocouple 5 are provided with a first ignition needle 9, and the second air outlet 4 and the second thermocouple 6 are provided with a second ignition needle 10. The first ignition needle 9 is used to ignite the fuel output by the first air outlet 3, and correspondingly, the first thermocouple 5 is used to contact the flame generated by the first ignition needle 9; the second ignition needle 10 is used to ignite the fuel output by the second air outlet 4, and correspondingly, the second thermocouple 6 is used to contact the flame generated by the second ignition needle 10.

[0074] Specifically, the first ignition needle 9 ignites the flame generated by the fuel output by the first gas outlet 3, and the first thermocouple 5 is in contact with the generated flame, thereby generating a potential difference between the two ends of the first thermocouple 5, so that the first voltage detection signal detected by the first thermocouple 5 is switched to high level, thereby indicating that the first gas outlet 3 is normally burning; the second ignition needle 10 ignites the flame generated by the fuel output by the second gas outlet 4, and the second thermocouple 6 is in contact with the generated flame, thereby generating a potential difference between the two ends of the second thermocouple 6, so that the second voltage detection signal detected by the second thermocouple 6 is switched to high level, thereby indicating that the second gas outlet 4 is normally burning.

[0075] In one embodiment, the system further comprises an ignition switch connected with the first ignition needle 9 and the second ignition needle 10 respectively. When the user triggers the ignition switch, the first ignition needle 9 generates an electric spark to ignite the fuel output by the first gas outlet 3, and the second ignition needle 10 generates an electric spark to ignite the fuel output by the second gas outlet 4.

[0076] In one embodiment, the first gas inlet pipe 1 and the second gas inlet pipe 2 are respectively connected with the gas outlet pipe, and the gas outlet pipe is respectively connected with the first gas outlet 3 and the second gas outlet 4. At the same time, the gas outlet pipe is also connected with the electromagnetic valve 8, which will open or cut off the flow of fuel in the gas outlet pipe according to the indication of the controller 7, thereby controlling the combustion of fuel at the first gas outlet 3 and the second gas outlet 4.

[0077] The control system of the warmer of the present application, on the one hand, through the first gas inlet pipe and the second gas inlet pipe sharing the first gas outlet and the second gas outlet, the fuel from the first gas inlet pipe or the second gas inlet pipe is output to the first gas outlet and / or the second gas outlet, and the first thermocouple arranged at the first gas outlet and the second thermocouple arranged at the second gas outlet respectively detect the combustion conditions at the first gas outlet and the second gas outlet, thereby determining the current fuel in combination with the combustion conditions at the first gas outlet and the second gas outlet; on the other hand, by arranging the first micro switch on the first gas inlet pipe and the second micro switch on the second gas inlet pipe, the gas inlet conditions of the first gas inlet pipe and the second gas inlet pipe are respectively detected, thereby determining the current gas inlet; thereby, in combination with the combustion conditions detected by the first thermocouple and the second thermocouple to determine the current fuel type, and in combination with the gas inlet conditions detected by the first micro switch and the second micro switch to determine the current gas inlet, so as to accurately judge whether the warmer is correctly connected to the gas and whether the fuel is normally burned, and based thereon to control the action of the electromagnetic valve, thereby ensuring accurate control of the electromagnetic valve, ensuring safe combustion of the gas and normal use of the warmer.

[0078] According to the embodiments of the present application, the other aspect further provides a control method of the heater, which can be applied to the control system of the heater as described above. Fig. 4 is a flowchart of a control method of a heater according to an embodiment of the present application. As shown in Fig. 4, the method can include the following steps:

[0079] Step 410: obtaining a first sensing signal value of the first micro switch 11 and a second sensing signal value of the second micro switch 21 respectively, and determining the current air inlet based on the first sensing signal value and the second sensing signal value.

[0080] In the embodiments of the present application, the first micro switch 11 detects the air intake of the first air inlet pipe 1 to obtain a first sensing signal; different signal values of the first sensing signal reflect different air intake conditions of the first air inlet pipe 1. The second micro switch 21 detects the air intake of the second air inlet pipe 2 to obtain a second sensing signal; different signal values of the second sensing signal reflect different air intake conditions of the second air inlet pipe 2.

[0081] In the embodiments of the present application, based on the first sensing signal value and the second sensing signal value, the air intake conditions of the first air inlet pipe 1 and the second air inlet pipe 2 can be determined, so as to determine whether the current air inlet pipe is the first air inlet pipe 1 or the second air inlet pipe 2. If the current air inlet pipe is the first air inlet pipe 1, it indicates that the current air inlet is the first air inlet 12; if the current air inlet pipe is the second air inlet pipe 2, it indicates that the current air inlet is the second air inlet 22.

[0082] Step 420: obtaining a first voltage signal value of the first thermocouple 5 and a second voltage signal value of the second thermocouple 6 respectively, and determining the current fuel type based on the first voltage signal value and the second voltage signal value.

[0083] In the embodiments of the present application, the first thermocouple 5 outputs a corresponding first voltage signal based on the potential difference between the two ends thereof; different signal values of the first voltage signal reflect different combustion conditions of the first air outlet 3. The second thermocouple 6 outputs a corresponding second voltage signal based on the potential difference between the two ends thereof; different signal values of the second voltage signal reflect different combustion conditions of the second air outlet 4.

[0084] In the embodiments of the present application, different types of fuel produce different combustion conditions at the first air outlet 3 and the second air outlet 4 after being connected to the first air inlet 12 or the second air inlet 22; accordingly, in combination with the first voltage signal value and the second voltage signal value, the combustion conditions of the first air outlet 3 and the second air outlet 4 are determined, which are compared with the combustion conditions corresponding to various fuel types, so as to determine the current fuel type connected to the heater.

[0085] Step 430: controlling the action of the electromagnetic valve 8 based on the current intake port and the current fuel type.

[0086] In the embodiments of the present application, since the first intake port 12 and the second intake port 22 have their corresponding fuel types respectively, only when the fuel of the corresponding fuel type is connected to the intake pipeline, it can be considered that the intake pipeline is correctly connected to the fuel, and at this time, the heater is allowed to work, so as to ensure that the gas is safely burned and the heater can be normally used.

[0087] Specifically, if the fuel type corresponding to the current intake port is consistent with the current fuel type, it is considered that the fuel is correctly connected to the intake pipeline at this time, and therefore the electromagnetic valve 8 is controlled to be opened at this time, so that the fuel in the pipeline can normally flow, and the heater can normally work. If the fuel type corresponding to the current intake port is inconsistent with the current fuel type, it is considered that the fuel is incorrectly connected to the intake pipeline at this time, and therefore the electromagnetic valve 8 is controlled to be closed at this time, so as to cut off the flow of the fuel in the pipeline, and the heater stops working.

[0088] In one embodiment, in the above step 410, different intake situations of the first intake port 12 of the first intake pipeline 1 cause different triggering situations 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 intake situations. Specifically, if the first intake port 12 of the first intake pipeline 1 is connected to the fuel to trigger the first micro switch 11, the first sensing signal is high level, and the first sensing signal value obtained by the controller 7 is the first preset value; if the first intake port 12 is not connected to the fuel, the first micro switch 11 is not triggered at this time, the first sensing signal is low level, and the first sensing signal value obtained by the controller 7 is the second preset value. 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.

[0089] In one embodiment, in the above step 410, different intake situations of the second intake port 22 of the second intake pipeline 2 cause different triggering situations 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 intake situations. Specifically, if the second intake port 22 of the second intake pipeline 2 is connected to the fuel to trigger the second micro switch 21, the first sensing signal is high level, and the second sensing signal value obtained by the controller 7 is the first preset value at this time; if the second intake port 22 is not connected to the fuel, the second micro switch 21 is not triggered at this time, the second sensing signal is low level, and the second sensing signal value obtained by the controller 7 is the second preset value.

[0090] In one embodiment, Fig. 5 is a flow chart of determining the current air inlet in the control method of the heater according to an embodiment of the present application. As shown in Fig. 5, considering that the different first sensing signal value and second sensing signal value correspond to different air inlet conditions, in step 410, determining the current air inlet based on the first sensing signal value and the second sensing signal value can include the following steps:

[0091] Step 510: If the first sensing signal value is the first preset value and the second sensing signal value is the second preset value, it is determined that the current air inlet is the first air inlet 12.

[0092] In the embodiment of the present application, if the first sensing signal value is the first preset value, it indicates that the first micro switch 11 is triggered, and at this time, fuel is connected in the first air 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 at this time, fuel is not connected in the second air pipe 2. Therefore, it can be determined that the current air inlet is the first air inlet 12.

[0093] Step 520: 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.

[0094] In the embodiment of the present application, if the second sensing signal value is the first preset value, it indicates that the second micro switch 21 is triggered, and at this time, fuel is connected in the second air 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 at this time, fuel is not connected in the first air pipe 1. Therefore, it can be determined that the current air inlet is the second air inlet 22.

[0095] In one embodiment, since the heater is usually connected with only one air inlet, or only one air inlet is connected with fuel at the same time, the first sensing signal value and the second sensing signal value usually will not be 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 has a fault, or the connection of the heater with the air supply pipe or the fuel supply has a problem, and therefore the electromagnetic valve 8 is controlled to be closed at this time.

[0096] In one embodiment, if the first sensing signal value and the second sensing signal value are both the second preset value, it indicates that no fuel is connected in the first air pipe 1 and the second air pipe 2 at present, and the heater is not working.

[0097] In one embodiment, in the step 420, when the first thermocouple 5 and the second thermocouple 6 contact the flame, the potential difference between the two ends of the first thermocouple 5 and the second thermocouple 6 changes, and thus the first voltage signal value of the first thermocouple 5 and the second voltage signal value between the two ends of the second thermocouple 6 change. Therefore, the controller 7 detects and acquires 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 in real time, determines the first voltage signal value of the first thermocouple based on the potential difference between the two ends of the first thermocouple 5, and determines the second voltage signal value of the second thermocouple based on the potential difference between the two ends of the second thermocouple 6.

[0098] In one embodiment, in the step 420, different combustion conditions of the first gas outlet 3 cause different potential differences between the two ends of the first thermocouple 5, and thus 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 between the two ends of the first thermocouple 5 is greater than the preset potential difference, it indicates that the first thermocouple 5 contacts the flame, and the first voltage signal is high. At this time, the first voltage signal value acquired by the controller 7 is the third preset value. If the potential difference between the two ends of the first thermocouple 5 is less than the preset potential difference, it indicates that the first thermocouple 5 does not contact the flame, or the length of the flame does not reach the normal combustion length of the flame, and the first voltage signal is low. At this time, the first voltage signal value acquired by the controller 7 is the fourth preset value. The preset potential difference is the potential difference between the two ends of the thermocouple when it contacts the normally combusting flame. The third preset value and the first preset value are both signal values corresponding to 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 second preset value are both signal values corresponding to low level, and the fourth preset value and the second preset value can take the same value, for example, both are 0.

[0099] In one embodiment, in the step 420, different combustion conditions of the second gas outlet 4 cause different potential differences between the two ends of the second thermocouple 6, and thus 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 between the two ends of the second thermocouple 6 is greater than the preset potential difference, it indicates that the second thermocouple 6 contacts the flame, and the second voltage signal is high. At this time, the second voltage signal value acquired by the controller 7 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, it indicates that the second thermocouple 6 does not contact the flame, or the length of the flame does not reach the normal combustion length of the flame, and the second voltage signal is low. At this time, the second voltage signal value acquired by the controller 7 is the fourth preset value.

[0100] In one embodiment, FIG. 6 is a flow diagram of determining the current fuel type in the control method of the heater according to an embodiment of the present application. As shown in FIG. 6, in step 420, the current fuel type is determined based on the first voltage signal value and the second voltage signal value, taking into account the different first voltage signal value and the second voltage signal value, which can include the following steps:

[0101] 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.

[0102] In an embodiment of the present application, 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, i.e., the fuel type corresponding to the first air inlet 12 is propane gas, then the first type is propane gas.

[0103] In an embodiment of the present application, if the first voltage signal value and the second voltage signal value are both the third preset value, it indicates that the combustion of the first air outlet 3 and the second air outlet 4 is normal combustion, and at this time the current fuel type can be determined as the first type corresponding to the first air inlet 12.

[0104] Step 620: 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.

[0105] In an embodiment of the present application, 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 air inlet, i.e., the fuel type corresponding to the second air inlet 22 is natural gas, then the second type is natural gas.

[0106] In an embodiment of the present application, if the first voltage signal value and the second voltage signal value are not equal, i.e., 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, it indicates that only one of the first air outlet 3 and the second air outlet 4 has normal combustion, and at this time the current fuel type can be determined as the second type corresponding to the second air inlet 22.

[0107] 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 both do not burn normally. At this time, if the first sensing signal is the first preset value or the second sensing signal is the first preset value, i.e. fuel is connected to the first air inlet pipeline 1 or the second air inlet pipeline 2, it indicates that the fuel circulation in the heater at this time has a problem, i.e. the heater may have a fault; if the first sensing signal and the second sensing signal are both the second preset value, i.e. fuel is not connected to the first air inlet pipeline 1 and the second air inlet pipeline 2, it indicates that fuel is not input to the heater at this time, and the heater does not work.

[0108] In the embodiments of the present application, since the required pressure corresponding to the fuel type of the first air inlet pipeline 1, i.e. the first type of fuel, is greater than the required pressure corresponding to the fuel type of the second air inlet pipeline 2, i.e. the second type of fuel, no matter which air inlet pipeline the first type of fuel is connected to, the first type of fuel can be normally output to the first air outlet 3 and the second air outlet 4, 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.

[0109] Specifically, Table 1 is a schematic table of sensing 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.

[0110] Table 1

[0111] As shown in Table 1, for the first type of fuel, no matter which air inlet pipeline it is connected to, the first air outlet 3 and the second air outlet 4 can both burn normally; corresponding to Table 1, i.e. when the fuel type is the first type, whether the first sensing signal value of the first micro switch 11 is 1 or the second sensing signal value of the second micro switch 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, i.e. the first sensing signal value of the first micro switch 11 is 1, the first air outlet 3 cannot burn normally, 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, i.e. the second sensing signal value of the second micro switch 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 enable the heater to work only when the corresponding fuel type of fuel is accessed to the air inlet pipeline, to ensure the safe combustion of gas, in the case of the fuel type being the first type, 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, the electromagnetic valve 8 is controlled to open, that is, only when the first air inlet pipeline 1 accesses the first type of fuel, and the first air outlet 3 and the second air outlet 4 can normally burn, the electromagnetic valve 8 is opened to make the heater work. In the case of the fuel type being the second type, 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, the electromagnetic valve 8 is controlled to open, that is, only when the second air inlet pipeline 2 accesses the second type of fuel, and the first air outlet 3 can normally burn, the electromagnetic valve 8 is opened to make the heater work.

[0113] The control method of the heater of the present application, on the one hand, the detection result of the first air inlet pipeline by the first micro switch is represented by the first sensing signal value, and the detection result of the second air inlet pipeline by the second micro switch is represented by the second sensing signal value, so that according to the first sensing signal value and the second sensing signal value, the current air inlet can be correctly judged; on the other hand, the detection result of the first air outlet by the first thermocouple is represented by the first voltage signal value, and the detection result of the second air outlet by the second thermocouple is represented by the second voltage signal value, so that according to the first voltage signal value and the second voltage signal value, the current fuel type can be correctly judged; thus, it can be accurately judged whether the heater is correctly connected to the gas and whether the fuel is normally burned, and the action of the electromagnetic valve is controlled based on this, to ensure the accurate control of the electromagnetic valve, to ensure the safe combustion of gas and the normal use of the heater.

[0114] In the specific content of the above specific embodiments, any non-contradictory combination of technical features can be made, and in order to make the description simple, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the description.

[0115] The specific content of the above specific embodiments only expresses several embodiments of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A control system for a heater, the control system comprising: The application relates to a control system of a warmer. The control system comprises: a first air inlet pipeline (1) and a second air inlet pipeline (2), the first air inlet pipeline (1) and the second air inlet pipeline (2) correspond to fuel types one by one, the first air inlet pipeline (1) and the second air inlet pipeline (2) each have a first air outlet (3) and a second air outlet (4), a first thermocouple (5) is arranged at the first air outlet (3), and a second thermocouple (6) is arranged at the second air outlet (4); a first micro switch (11) arranged on the first air inlet pipeline (1); a second micro switch (21) arranged on the second air inlet pipeline (2); a controller (7) connected with the first micro switch (11), the second micro switch (21), the first thermocouple (5), the second thermocouple (6) and an electromagnetic valve (8) respectively; the controller (7) is used for determining a current air inlet based on detection results of the first micro switch (11) and the second micro switch (21), determining a current fuel type based on detection results of the first thermocouple (5) and the second thermocouple (6), and controlling the action of the electromagnetic valve (8) based on the current air inlet and the current fuel type. The first air inlet pipeline (1) comprises a first air inlet (12), the first micro switch (11) is arranged at the first air inlet (12) and is triggered when fuel is connected to the first air inlet (12); the second air inlet pipeline (2) comprises a second air inlet (22), the second micro switch (21) is arranged at the second air inlet (22) and is triggered when fuel is connected to the second air inlet (22). 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 for igniting fuel output by the first air outlet (3), and the first thermocouple (5) is used for contacting a flame generated by the first ignition needle (9); the second ignition needle (10) is used for igniting fuel output by the second air outlet (4), and the second thermocouple (6) is used for contacting a flame generated by the second ignition needle (10). The first air inlet pipeline (1) and the second air inlet pipeline (2) are respectively connected with an air outlet pipeline, and the air outlet pipeline is respectively connected with the first air outlet (3) and the second air outlet (4). The application is applied to the control system of the warmer, and the method comprises the following steps:

2. The system of claim 1, wherein, first and second sensing signal values of the first micro switch (11) and the second micro switch (21) are respectively acquired, and a current air inlet is determined based on the first and second sensing signal values. ​ 3. The system of claim 1, wherein, ​ ​ ​ 4. The system of claim 1, wherein, ​ 5. A control method of a warmer, characterized by, ​ ​ acquire a first voltage signal value of the first thermocouple (5) and a second voltage signal value of the second thermocouple (6) respectively, and determine a current fuel type based on the first voltage signal value and the second voltage signal value; control the action of the electromagnetic valve (8) based on the current air inlet and the current fuel type.

6. The method of claim 5, wherein, The acquiring of the first sensing signal value of the first micro switch (11) and the second sensing signal value of the second micro switch (21) respectively includes: If the first air inlet (12) of the first air pipe (1) is connected to fuel to trigger the first micro switch (11), the first sensing signal value acquired is a first preset value; If the first air inlet (12) is not connected to fuel, the first sensing signal value acquired is a second preset value; If the second air inlet (22) of the second air pipe (2) is connected to fuel to trigger the second micro switch (21), the second sensing signal value acquired is the first preset value; If the second air inlet (22) is not connected to fuel, the second sensing signal value acquired is the second preset value.

7. The method of claim 6, wherein, The determination of 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 the first preset value and the second sensing signal value is the second preset value, it is determined that the current air inlet is the 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 of claim 5, wherein, The acquiring of the first voltage signal value of the first thermocouple (5) and the second voltage signal value of the second thermocouple (6) respectively includes: Acquire 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) respectively; If the potential difference between the two ends of the first thermocouple (5) is greater than a preset potential difference, the first voltage signal value acquired 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 acquired 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 second voltage signal value acquired 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 second voltage signal value acquired is the fourth preset value.

9. The method of claim 8, wherein, The determination of 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 the third preset value, it is determined that the current fuel type is a 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 a second type; the second type is consistent with the fuel type corresponding to the second air inlet (22).

10. The method of claim 5, wherein, The control of the action of the electromagnetic valve (8) based on the current air inlet and the current fuel type includes: If the fuel type corresponding to the current intake port is consistent with the current fuel type, the solenoid valve (8) is controlled to open. If the fuel type corresponding to the current intake port is inconsistent with the current fuel type, the solenoid valve (8) is controlled to close.

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