Gas furnace and gas supply system and control method thereof

Abstract

The invention discloses a gas furnace as well as a gas supply system and a control method thereof. The gas supply system of the gas furnace comprises a fan, a gas electronic proportional valve and a gas outlet pipeline connected with an outlet of the gas electronic proportional valve, after the fan is started, fuel gas can flow in from the fuel gas electronic proportional valve and flow out from the fuel gas outlet pipeline, and the fuel gas flowing out from the fuel gas outlet pipeline can be mixed with air for combustion. The fuel gas supply system further comprises a detection part used for detecting the flow and / or pressure of fuel gas, and the fuel gas electronic proportional valve can adjust the opening degree according to the detection result of the detection part. And the inlet of the detection piece is arranged at the outlet of the gas electronic proportional valve, or the inlet of the detection piece is positioned on the gas outlet pipeline and is arranged close to the outlet of the gas electronic proportional valve. According to the invention, high accuracy of gas adjustment and small overall size of the gas furnace can be considered; and the blockage condition of the inlet of the detection piece can be identified before ignition, so that the problems of starting-up deflagration or incapability of starting up and the like can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas combustion device, in particular to a gas stove and a gas supply system and control method thereof. BACKGROUND

[0002] The existing gas combustion device mainly includes: a fan, a gas electronic proportional valve, a burner, a combustion chamber, a heat exchanger and the like. Among them, the gas electronic proportional valve is used to control the supply amount of the gas mixed with the air sucked by the fan, and is one of the core components of the gas combustion device.

[0003] During the working process of the gas combustion device, the opening degree adjustment of the gas electronic proportional valve is crucial, which determines the gas flow rate supplied to the burner during combustion. Once the opening degree adjustment of the gas electronic proportional valve is inaccurate or the gas electronic proportional valve fails, it may cause the working performance of the gas combustion device to decrease; or it may also cause problems such as explosion during starting, inability to start and the like.

[0004] Therefore, it is necessary to provide a gas stove and a gas supply system and control method thereof to solve the above problems. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a gas stove and a gas supply system and control method thereof, which can balance the accuracy of gas regulation and the small overall volume of the gas stove; in addition, it can identify the blockage of the inlet of the detection member before ignition, so as to avoid problems such as explosion during starting or inability to start.

[0006] The specific technical scheme of the present application is as follows:

[0007] A gas supply system of a gas stove, the gas supply system of the gas stove comprising: a fan, a gas electronic proportional valve and a gas outlet pipeline connected with the outlet of the gas electronic proportional valve; after the fan is started, gas can flow from the gas electronic proportional valve and out of the gas outlet pipeline, and the gas flowing out of the gas outlet pipeline can be mixed with air for combustion; the gas supply system further comprises a detection member for detecting the flow rate and / or pressure of the gas, the gas electronic proportional valve can adjust the opening degree according to the detection result of the detection member, and the inlet of the detection member is arranged at the outlet of the gas electronic proportional valve or the inlet of the detection member is arranged on the gas outlet pipeline and close to the outlet of the gas electronic proportional valve.

[0008] In a preferred embodiment, the gas supply system further comprises a pressure stabilizing structure having a pressure stabilizing structure inlet, a pressure stabilizing structure outlet, and a pressure stabilizing structure channel, and part of the gas can flow into the pressure stabilizing structure inlet, flow through the pressure stabilizing structure channel, and be detected by the detection part of the detection member after flowing out of the pressure stabilizing structure outlet.

[0009] In a preferred embodiment, the inlet of the detection member is located on the gas outlet pipeline and is arranged close to the outlet of the gas electronic proportional valve, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is not more than 1 / 3 of the total length of the gas outlet pipeline.

[0010] In a preferred embodiment, the inlet of the detection member is located on the gas outlet pipeline and is arranged close to the outlet of the gas electronic proportional valve, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is within 100 mm.

[0011] In a preferred embodiment, the inlet of the detection member is located on the gas outlet pipeline and is arranged close to the outlet of the gas electronic proportional valve, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is less than 5 times the pipe diameter of the gas outlet pipeline.

[0012] In a preferred embodiment, the pipeline between the inlet of the detection member and the outlet of the gas electronic proportional valve is a straight pipe section, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is not more than 2.4 times the pipe diameter of the gas outlet pipeline.

[0013] In a preferred embodiment, the pipeline length between the inlet of the detection member and the fan is not less than 5 times the pipe diameter of the gas outlet pipeline.

[0014] In a preferred embodiment, the pipeline length between the outlet of the gas electronic proportional valve and the fan is 5-20 times the pipe diameter of the gas outlet pipeline, or the pipeline length between the outlet of the gas electronic proportional valve and the fan is between 350 mm and 400 mm.

[0015] In a preferred embodiment, the pipeline length between the inlet of the detection member and the fan is 5-17.4 times the pipe diameter of the gas outlet pipeline, or the pipeline length between the inlet of the detection member and the fan is between 310 mm and 320 mm.

[0016] In a preferred embodiment, part of the gas can flow into the pressure stabilizing structure inlet, flow through the pressure stabilizing structure channel, and flow into the inlet of the detection member after flowing out of the pressure stabilizing structure outlet.

[0017] In a preferred embodiment, the pressure stabilizing structure has a pressure stabilizing structure body, the pressure stabilizing structure body is located in the gas outlet pipeline, a predetermined distance is formed between the outer surface of the pressure stabilizing structure body and part of the inner surface of the gas outlet pipeline to form the flow stabilizing channel, and the pressure stabilizing structure inlet is provided through the pressure stabilizing structure body.

[0018] In a preferred embodiment, the pressure stabilizing structure body is annular as a whole and is embedded in the gas outlet pipeline.

[0019] In a preferred embodiment, gas flow guide grooves are formed on the outer surface of the pressure stabilizing structure body and / or part of the inner surface of the gas outlet pipeline.

[0020] In a preferred embodiment, a stop portion is provided in the gas flow guide groove, and the stop portion is used to change the flow direction of the gas.

[0021] In a preferred embodiment, an arc-shaped flow guide portion and / or a broken line flow guide portion is formed on the edge of the gas flow guide groove.

[0022] In a preferred embodiment, the number of the pressure stabilizing structure inlets is multiple, and the multiple pressure stabilizing structure inlets are multiple openings arranged at intervals.

[0023] In a preferred embodiment, the opening area of the pressure stabilizing structure inlet is smaller than the opening area of the pressure stabilizing structure outlet.

[0024] In a preferred embodiment, the openings of at least part of the pressure stabilizing structure inlets are arranged at different heights.

[0025] In a preferred embodiment, in the height direction, the opening area of the pressure stabilizing structure inlet at the lower position is smaller than the opening area of the pressure stabilizing structure inlet at the higher position, or the opening area of the pressure stabilizing structure inlet gradually decreases from top to bottom.

[0026] In a preferred embodiment, the gas outlet pipeline has a connecting piece, the connecting piece is used to be connected with the outlet of the gas electronic proportional valve, the inlet of the detection piece is provided on the connecting piece, the connecting piece has a connecting port in communication with the inlet of the detection piece, the pressure stabilizing structure body is located in the connecting piece, and a predetermined distance is formed between the outer surface of the pressure stabilizing structure body and part of the inner surface of the connecting piece to form the flow stabilizing channel.

[0027] In a preferred embodiment, the connecting piece includes a flange, and the flow stabilizing channel is annular as a whole.

[0028] In a preferred embodiment, the steady flow channel of the pressure stabilizing structure comprises at least two sub-steady flow channels in parallel, and part of the gas flows into the steady flow channel from the pressure stabilizing structure inlet, is stabilized by the at least two sub-steady flow channels in parallel, and is detected by the detection part of the detection member after flowing out of the pressure stabilizing structure outlet.

[0029] In a preferred embodiment, one side of the pressure stabilizing structure body abuts against the end face of the outlet of the gas electronic proportional valve, the inside of the connecting member is provided with a limiting part, and the other side of the pressure stabilizing structure body abuts against the limiting part.

[0030] In a preferred embodiment, the gas supply system further comprises a sealing member for sealing the gap between the pressure stabilizing structure body and the connecting member, and the sealing member is arranged between the connecting member and the outlet of the gas electronic proportional valve.

[0031] In a preferred embodiment, the pressure stabilizing structure is arranged in the detection member, and the pressure stabilizing structure is located outside the gas outlet pipeline, and the gas flowing into the inlet of the detection member can be detected by the detection part of the detection member after flowing through the pressure stabilizing structure.

[0032] In a preferred embodiment, the steady flow channel of the pressure stabilizing structure comprises a curved flow channel capable of changing the flow direction of the gas.

[0033] In a preferred embodiment, the gas outlet pipeline has a connecting member for connecting with the outlet of the gas electronic proportional valve, the inlet of the detection member is arranged on the connecting member, and the connecting member has a connecting port in communication with the inlet of the detection member.

[0034] In a preferred embodiment, the gas electronic proportional valve has a valve body and a gas outlet part integrally formed with the valve body, the gas outlet part is connected with the gas outlet pipeline, and the inlet of the detection member is arranged on the gas outlet part.

[0035] In a preferred embodiment, the gas outlet part has a connecting part for connecting with the gas outlet pipeline, and the inlet of the detection member is arranged on the connecting part.

[0036] In a preferred embodiment, the gas supply system further comprises a pressure stabilizing structure arranged inside the connecting part, the pressure stabilizing structure has a pressure stabilizing structure inlet, a steady flow channel, and a pressure stabilizing structure outlet, and part of the gas flows into the steady flow channel from the pressure stabilizing structure inlet, is stabilized by the steady flow channel, and flows out of the pressure stabilizing structure outlet, and then is detected by the detection part of the detection member after flowing into the inlet of the detection member.

[0037] In a preferred embodiment, the gas supply system further comprises a pressure stabilizing structure, which is located outside the connecting portion and inside the detecting member, and has a pressure stabilizing structure inlet, a pressure stabilizing channel and a pressure stabilizing structure outlet, part of the gas flowing into the inlet of the detecting member can flow into the pressure stabilizing structure inlet, be stabilized in the pressure stabilizing channel and flow out of the pressure stabilizing structure outlet to be detected by the detecting portion of the detecting member.

[0038] In a preferred embodiment, the detecting member comprises a pressure sensor.

[0039] A gas stove, comprising: a housing and the gas supply system of any one of the above-mentioned gas stoves, wherein the gas electronic proportional valves of the gas supply system are all arranged in the housing.

[0040] In a preferred embodiment, the gas stove further comprises: a controller, which is in communication connection with the fan and the detecting member, and the gas electronic proportional valves are in communication connection with the detecting member.

[0041] In a preferred embodiment, the detecting portion of the detecting member is arranged on the computer board of the gas electronic proportional valve, the gas flowing into the inlet of the detecting member is guided to the detecting portion by a hose, and the controller is in communication connection with the detecting portion on the computer board of the gas electronic proportional valve.

[0042] A control method based on the above-mentioned gas stove, wherein the flow area of the inlet of the detecting member is less than a preset value, and the control method comprises:

[0043] When the gas stove is started for the first time, at least the fan is controlled to run at a first load, at least the first detection data is obtained by the detecting member, and at least the first detection data is compared with the first preset data, if the detection data matches the preset data, it is confirmed that the inlet of the detecting member is not blocked when the gas stove is started for the first time, and the gas stove is normally ignited and operated;

[0044] When the gas stove is started subsequently, the fan is controlled to run at the first load, the second detection data is obtained by the detecting member, and the second detection data is compared with the first detection data, if the second detection data matches the first detection data, it is confirmed that the inlet of the detecting member is not blocked when the gas stove is started subsequently, and the gas stove is normally ignited and operated.

[0045] In a preferred embodiment, the step of confirming that the detection member is not blocked when the gas stove is started for the first time specifically comprises: when the gas stove is started for the first time, controlling the fan to run at a first load, obtaining first detection data through the detection member, comparing the first detection data with first preset data, if the first detection data matches the first preset data, controlling the fan to run at a second load different from the first load, obtaining third detection data through the detection member, and comparing the third detection data with second preset data, if the third detection data still matches the second preset data, confirming that the inlet of the detection member is not blocked when the gas stove is started for the first time.

[0046] In a preferred embodiment, the first load is the load required in the pre-cleaning stage of the gas stove, and the step of confirming that the inlet of the detection member is not blocked when the gas stove is started for the subsequent time specifically comprises: when the gas stove is started for the subsequent time, controlling the fan to pre-clean at the first load, obtaining second detection data through the detection member in the pre-cleaning stage, comparing the second detection data with the first detection data, and if the second detection data matches the first detection data, confirming that the inlet of the detection member is not blocked when the gas stove is started for the subsequent time.

[0047] In a preferred embodiment, the opening diameter of the inlet of the detection member is between 0.5 mm and 1.0 mm.

[0048] The technical scheme of the present application has the following remarkable beneficial effects:

[0049] In the embodiments of the present application, by setting the inlet of the detection member at the outlet of the gas electronic proportional valve or setting the inlet of the detection member on the gas outlet pipeline close to the outlet of the gas electronic proportional valve, compared with the conventional scheme (setting the inlet of the detection member at a position upstream of the outlet of the gas electronic proportional valve and communicating with the curved internal flow channel upstream of the outlet of the gas proportional valve), the pressure taking accuracy (taking the detection member as a pressure sensor as an example) can be relatively reliably ensured, thereby ensuring high accuracy of gas regulation, and at the same time, the inlet of the detection member is still set at or close to the outlet of the gas proportional valve, so that the volume of the gas supply system does not increase too much, thereby ensuring that the gas stove still has a small overall volume.

[0050] Further, the gas supply system can further comprise a pressure stabilizing structure, which can stabilize the flow of the gas before the detection part of the detection member detects, so as to further improve the pressure taking accuracy (taking the detection member as a pressure sensor as an example), so that the high accuracy of gas regulation can be further ensured without increasing the overall volume of the gas supply system and the gas stove.

[0051] In addition, the application also provides a control method of the gas stove. The control method can identify the blockage of the inlet of the detection member in advance before ignition, so as to avoid the problems of explosion or failure to start.

[0052] Specific embodiments of the application are disclosed in detail below, with reference to the following description and drawings. The disclosure of the application is not limited to the specific embodiments described below. The specific embodiments are presented in order to explain the principles of the application and to provide a detailed description of the application. It should be understood that the embodiments of the application are not limited in scope to the specific embodiments described below. The embodiments of the application include many changes, modifications and equivalents within the spirit and scope of the appended claims. Features described and / or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with other features of the other embodiments, or in place of other features of the other embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0053] The drawings described herein are for purposes of illustration only and are not intended to limit the scope of the present disclosure. Additionally, the shapes and proportions of the various components in the drawings are not intended to be specific, but are for the purpose of helping to understand the present application, and are not specific limitations on the shapes and proportions of the components of the present application. Those skilled in the art can select various possible shapes and proportions according to specific circumstances to implement the present application under the guidance of the present application.

[0054] Figure 1 A schematic structural diagram of a gas supply system of a gas stove provided in the embodiments of the present application;

[0055] Figure 2 A schematic diagram of the cooperation between the inlet of the detection member and the connecting member in the gas supply system of the gas stove provided in the embodiments of the present application;

[0056] Figure 3 An exploded schematic diagram of the connecting member and the pressure stabilizing structure body provided in the embodiments of the present application;

[0057] Figure 4 A schematic diagram of the pressure stabilizing structure body provided in the embodiments of the present application;

[0058] Figure 5 A schematic diagram of another pressure stabilizing structure body provided in the embodiments of the present application;

[0059] Figure 6 A schematic diagram of still another pressure stabilizing structure body provided in the embodiments of the present application;

[0060] Figure 7 A schematic diagram of the relative position relationship between the connecting member, the pressure stabilizing structure body and the outlet of the electronic proportional gas valve provided in the embodiments of the present application;

[0061] Figure 8 A schematic diagram of the relative positional relationship between the voltage stabilizing structure provided in an embodiment of the present application and the external connecting member;

[0062] Figure 9 for Figure 8 A schematic structural diagram of a voltage stabilizing structure provided in an embodiment;

[0063] Figure 10 This is a schematic structural diagram of a gas furnace provided in an embodiment of the present application;

[0064] Figure 11 This is a flow chart of the steps of a gas furnace control method provided in an embodiment of the present application.

[0065] Reference numerals of this application:

[0066] 1. Gas electronic proportional valve;

[0067] 11. The outlet of the gas electronic proportional valve;

[0068] 2. Gas outlet pipeline;

[0069] 21. Gas outlet;

[0070] 3. Fan;

[0071] 31. Negative pressure suction port;

[0072] 4. Inspection parts;

[0073] 5. Voltage stabilizing structure;

[0074] 50. Voltage stabilizing structure body;

[0075] 51. Voltage stabilizing structure entrance;

[0076] 52. Steady flow channel;

[0077] 501, gas diversion groove;

[0078] 502, stopper;

[0079] 503, arc-shaped guide part;

[0080] 504, fold line guide portion;

[0081] 505, curved flow channel;

[0082] 6. Connectors;

[0083] 61. Limiting part;

[0084] 62. Connection port;

[0085] 7. Shell. DETAILED DESCRIPTION

[0086] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0087] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0088] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0089] In an embodiment of the present invention, a gas furnace and its gas supply system and control method are provided, which can take into account the accuracy of gas regulation and the small overall size of the gas furnace; in addition, the blockage of the detection component entrance can be identified before ignition, thereby avoiding problems such as explosion during startup or inability to start the machine.

[0090] Please refer to the comprehensive Figures 1 to 9 In the embodiment of the present application, a gas supply system for a gas furnace is provided, which may include: a fan 3, a gas electronic proportional valve 1 and a gas outlet pipe 2 connected to the outlet 11 of the gas electronic proportional valve; after the fan 3 is started, gas can flow into the gas electronic proportional valve 1 and flow out of the gas outlet pipe 2, and the gas flowing out of the gas outlet pipe 2 can be mixed with air for combustion; the gas supply system also includes a detection component 4 for detecting the flow and / or pressure of the gas, the gas electronic proportional valve 1 can adjust the opening according to the detection result of the detection component 4, and the inlet of the detection component 4 is arranged at the outlet 11 of the gas electronic proportional valve or the inlet of the detection component 4 is located on the gas outlet pipe 2 and is arranged close to the outlet 11 of the gas electronic proportional valve.

[0091] In the embodiment of the present application, the gas supply system of the gas stove mainly comprises a gas electronic proportional valve 1, a gas outlet pipeline 2, a fan 3 and a detection member 4. After the fan 3 is started, gas can flow from the gas electronic proportional valve 1 and out of the gas outlet pipeline 2, and the gas out of the gas outlet pipeline 2 can be mixed with air for combustion. The gas electronic proportional valve 1, the gas outlet pipeline 2 and the fan 3 are connected to form a gas passage.

[0092] In addition, the gas supply system can further comprise a gas inlet pipeline (not shown in the figure), which can be connected to the inlet of the gas electronic proportional valve 1. After the fan 3 is started, under the action of the fan 3, gas can enter the gas electronic proportional valve 1 from the gas inlet pipeline and then flow out of the gas outlet pipeline 2, and the gas out of the gas outlet pipeline 2 can be mixed with air for combustion.

[0093] The detection member 4 is used to detect the flow rate and / or pressure of the gas. Specifically, the detection member 4 is mainly used to obtain the flow rate and / or pressure of the gas flowing into the fan 3 and mixed with air. The detection member 4 can be any one of a pressure sensor and a flow rate sensor, or the detection member 4 can also be in the form of other detection members capable of detecting the flow rate and / or pressure of the gas, or in the form of a detection member capable of detecting a parameter equivalent to at least one of the flow rate and pressure of the gas. The specific form of the detection member 4 is not limited to the above description, and those skilled in the art can also make other changes under the technical essence of the present application, as long as the functions and effects achieved are the same or similar to those of the present application, which should be covered within the protection scope of the present application.

[0094] In the embodiment of the present application, the specific form of the detection member 4 is mainly described by taking a pressure sensor as an example, and when the detection member 4 is in other forms, it can be analogized to the form of the pressure sensor described above, which will not be described one by one here. When the detection member 4 is a pressure sensor, the pressure sensor can be arranged outside the gas passage through which the gas flows, and the external pressure sensor is used for pressure detection. When the pressure sensor is arranged outside the gas passage, it will not interfere with the flow of the gas in the gas passage, and at the same time, the external pressure sensor mainly performs static pressure detection through the inlet of the detection member 4 connected to the gas passage during pressure detection, and the detection accuracy and reliability are easy to control.

[0095] The gas electronic proportional valve 1 can adjust its opening degree according to the detection result of the detection member 4. Specifically, the gas electronic proportional valve 1 comprises a valve body, a valve core matched with the valve body, a stepping motor connected with the valve core, and a computer board connected with the stepping motor. After the detection member 4 (for example, a pressure sensor) detects the gas pressure, a converter arranged in the detection member converts the detected gas pressure signal into an electric signal and transmits the electric signal to the computer board. The computer board adjusts the rotating steps of the stepping motor according to the electric signal. Since the stepping motor is connected with the valve core, the rotating steps of the stepping motor can be controlled to control the position of the valve core relative to the valve body, that is, to adjust the opening degree of the gas electronic proportional valve 1. The rotating steps of the stepping motor are proportional to the opening degree of the gas electronic proportional valve 1, that is, the more the stepping motor rotates, the greater the opening degree of the gas electronic proportional valve 1.

[0096] The fan 3 can be an air extractor, and a negative pressure suction port 31 connected with the gas outlet pipeline 2 can be arranged on the fan 3. When the fan 3 is started, negative pressure can be generated at the negative pressure suction port 31, so that the gas in the gas outlet pipeline 2 is sucked and mixed with air. Of course, in some embodiments, the fan 3 can also be in the form of a blower. In the embodiments of the present application, the air extractor is mainly taken as an example for illustration.

[0097] The gas outlet pipeline 2 is connected between the outlet 11 of the gas electronic proportional valve and the negative pressure suction port 31 of the fan 3. The gas outlet pipeline 2 can be a hollow pipe. Specifically, the cross-sectional size of the gas outlet pipeline 2 can be determined according to the power and other parameters of the gas stove, which is not limited in the present application.

[0098] The present inventors find that the position of the inlet of the detection member 4 is very important when adjusting the opening degree. If the inlet of the detection member 4 is arranged inside the gas electronic proportional valve 1 (upstream of the outlet), the flow channel structure inside the valve body is very complex, which will cause great disturbance to the gas flow, so that it is difficult to ensure the pressure taking accuracy (for example, the detection member 4 is a pressure sensor).

[0099] In the embodiments of the present application, the inlet of the detection member 4 is arranged at the outlet 11 of the gas electronic proportional valve or the inlet of the detection member 4 is arranged on the gas outlet pipeline 2 and close to the outlet 11 of the gas electronic proportional valve. In this way, the inlet of the detection member 4 can be avoided from the flow structure inside the gas electronic proportional valve 1 which greatly disturbs the gas flow, so that the pressure taking accuracy can be relatively reliably ensured, and the small size of the gas supply system and the gas stove can be considered.

[0100] The inventors of the present application have further found that there are other external factors that affect the pressure taking accuracy. For example, during the operation of the fan 3, its own operating parameters (for example, the fan speed) will inevitably fluctuate. When the speed of the fan 3 fluctuates, the fluctuation will affect the flow of the gas, and the flow and pressure in the gas passage will also fluctuate.

[0101] In some embodiments of the present application, the gas supply system can further comprise a pressure stabilizing structure 5 having a pressure stabilizing structure inlet 51, a flow stabilizing passage 52, and a pressure stabilizing structure outlet, part of the gas can flow into the pressure stabilizing structure inlet 51, flow through the flow stabilizing passage 52, and be detected by the detection part of the detection member 4 after flowing out of the pressure stabilizing structure outlet.

[0102] In the present embodiment, the gas supply system can further comprise a pressure stabilizing structure 5, which is mainly used to stabilize the flow of the gas before it is detected by the detection part of the detection member 4, thereby further improving the pressure taking accuracy.

[0103] When part of the gas flows into the pressure stabilizing structure inlet 51, flows through the flow stabilizing passage 52, and flows out of the pressure stabilizing structure outlet, since the part of the gas flows through the flow stabilizing passage 52, the flow speed and direction of the part of the gas can be controlled by the flow stabilizing passage 52, the flow of the gas entering the flow stabilizing passage 52 can be accurately controlled, the part of the gas can form a fluid with significant inertial effect along the flow direction of the flow stabilizing passage 52, and the whole flows towards the pressure stabilizing structure outlet, and after flowing out of the pressure stabilizing structure outlet, the part of the gas can be detected by the detection part of the detection member 4, thereby effectively reducing the influence of the fluctuation of the operating parameters of the fan 3 on the pressure taking accuracy.

[0104] In order to further ensure the pressure taking accuracy, the length of the pipeline between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve can be increased, but this will significantly increase the volume of the gas supply system and the gas stove.

[0105] In a specific application scenario, for a commercial gas stove, for example, in a commercial place such as a shopping mall, multiple gas stoves need to be set up to meet the hot water demand. For a commercial place such as a shopping mall, the space available for installing multiple gas stoves is limited. If the detection member is set in the gas outlet pipeline far away from the outlet of the gas electronic proportional valve in order to meet the detection accuracy requirement of the detection member, and in order to install the detection member in the shell of the gas stove, the shell of the gas stove often needs to be enlarged. However, since a large number of gas stoves need to be installed in the above-mentioned place, increasing the shell of the gas stove will significantly increase the floor area and the installation difficulty, and it is likely that multiple gas stoves cannot be installed in the predetermined installation space.

[0106] In the embodiment, by arranging the pressure stabilizing structure 5, the pressure taking precision can be improved effectively without increasing the length of the pipeline between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve, and further without increasing the volume of the gas stove. On the basis of considering the small overall volume of the gas stove, the pressure taking precision is further improved, and the precision of the gas supply of the gas supply system is ensured.

[0107] In one embodiment, the inlet of the detection member 4 is arranged on the gas outlet pipeline 2 and close to the outlet 11 of the gas electronic proportional valve, and the length of the pipeline between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is not more than 1 / 3 of the total length of the gas outlet pipeline 2.

[0108] In the embodiment, by reasonably optimizing the position of the inlet of the detection member 4, the distance from the inlet to the outlet 11 of the gas electronic proportional valve is controlled within 1 / 3 of the total length of the gas outlet pipeline 2, so that the inlet of the detection member 4 is arranged outside the gas electronic proportional valve 1, the pressure taking precision is improved, and the volume of the gas stove is not increased.

[0109] In theory, the gas outlet pipeline 2 is usually an equal cross-section structure with smooth inner surface, for example, a metal pipe with cylindrical cross-section. The farther the distance between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve, the smaller the disturbance influence of the complex gas flow channel structure inside the valve body of the gas electronic proportional valve 1. However, if the distance between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is increased infinitely, the length of the gas outlet pipeline 2 will be increased. If the gas electronic proportional valve 1 is installed in the shell 7 of the gas stove, the size of the shell 7 of the gas stove (i.e. the volume) may also be increased. Therefore, the distance between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve needs to be reasonably controlled.

[0110] In the embodiment, the specific ratio 1 / 3 is mainly a boundary based on the structure of the gas stove under the current general specification. In the embodiment, it is not excluded that the distance between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is greater than 1 / 3 of the total length of the gas outlet pipeline 2 for some special specifications of the gas stove, because of the need of special setting or directly ignoring the influence of the length of the gas outlet pipeline 2 and the volume of the gas stove.

[0111] In another embodiment, the inlet of the detection member 4 is arranged on the gas outlet pipeline 2 and close to the outlet 11 of the gas electronic proportional valve, and the length of the pipeline between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is within 100 mm.

[0112] In the embodiment, by reasonably optimizing the position of the inlet of the detecting member 4, the length of the pipeline between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve is within 100 mm, so that the inlet of the detecting member 4 is arranged outside the gas electronic proportional valve 1, the pressure taking precision is improved, and the volume of the gas stove is not increased.

[0113] The specific value 100 mm is mainly a boundary value set based on the structure of the gas stove under the current general specification. In the embodiment of the application, the length of the pipeline between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve can be greater than 100 mm for some special specifications of the gas stove, because of the special setting requirement or direct neglect of the influence of the length of the gas outlet pipeline 2 and the volume of the gas stove.

[0114] In another embodiment, the inlet of the detecting member 4 is arranged on the gas outlet pipeline 2 and close to the outlet 11 of the gas electronic proportional valve, and the length of the pipeline between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve is less than 5 times the pipe diameter of the gas outlet pipeline 2. The pipe diameter is the nominal diameter of the gas outlet pipeline 2.

[0115] In the embodiment, by reasonably optimizing the position of the inlet of the detecting member 4, the length of the pipeline between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve is less than 5 times the pipe diameter of the gas outlet pipeline 2, so that the inlet of the detecting member 4 is arranged outside the gas electronic proportional valve 1, the pressure taking precision is improved, and the volume of the gas stove is not increased.

[0116] The specific boundary value 5 times the pipe diameter of the gas outlet pipeline 2 is mainly a boundary value set based on the structure of the gas stove under the current general specification. In the embodiment of the application, the length of the pipeline between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve can be greater than 5 times the pipe diameter of the gas outlet pipeline 2 for some special specifications of the gas stove, because of the special setting requirement or direct neglect of the influence of the length of the gas outlet pipeline 2 and the volume of the gas stove.

[0117] Further, the gas outlet pipeline 2 between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve is a straight pipeline section, and the length of the pipeline between the inlet of the detecting member 4 and the outlet 11 of the gas electronic proportional valve is not greater than 2.4 times the pipe diameter of the gas outlet pipeline 2.

[0118] In the embodiment, when the gas outlet pipeline 2 between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is a straight pipe section, the flow direction of the gas flowing out of the outlet 11 of the gas electronic proportional valve is homogenized when passing through the straight pipe section, i.e., the gas flows in the extension direction of the straight pipe section, thereby further reducing the pipeline length between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve, which can be not more than 2.4 times the pipe diameter of the gas outlet pipeline 2.

[0119] In the embodiment, since the working parameters (e.g., rotation speed) of the fan 3 fluctuate when the fan 3 works, the fluctuation affects the flow of the gas, and the gas flow and pressure in the gas passage also fluctuate. In order to reduce the influence of the fan 3 on the gas flow and pressure in the gas passage as much as possible, the pipeline length between the inlet of the detection member 4 and the fan 3 can be controlled.

[0120] In one embodiment, the pipeline length between the inlet of the detection member 4 and the fan 3 is not less than 5 times the pipe diameter of the gas outlet pipeline 2.

[0121] In the embodiment, when the pipeline length between the inlet of the detection member 4 and the suction inlet of the fan 3 is 5 times the pipe diameter of the gas outlet pipeline 2, the pipeline length between the inlet of the detection member 4 and the suction inlet of the fan 3 can be used to reduce the influence of the fan 3 on the gas flow and pressure when the fan 3 works, so as to ensure that the pressure taking accuracy of the inlet of the detection member 4 at the position is not affected.

[0122] Further, the pipeline length between the inlet of the detection member 4 and the fan 3 is 5-17.4 times the pipe diameter of the gas outlet pipeline 2, or the pipeline length between the inlet of the detection member 4 and the fan 3 is between 310 mm and 320 mm.

[0123] In the embodiment, the pipeline length between the inlet of the detection member 4 and the suction inlet of the fan 3 can be set to 5-17.4 times the pipe diameter of the gas outlet pipeline 2, so as to reliably ensure the pressure taking accuracy of the detection member 4 without increasing the length of the gas outlet pipeline 2 and the volume of the gas stove. Alternatively, the pipeline length between the inlet of the detection member 4 and the fan 3 can be set to between 310 mm and 320 mm, which also can reliably ensure the pressure taking accuracy of the detection member 4 without increasing the length of the gas outlet pipeline 2 and the volume of the gas stove.

[0124] Further, the length of the pipe between the outlet 11 of the gas electronic proportional valve and the fan 3 is 5-20 times the diameter of the gas outlet pipe 2, or the length of the pipe between the outlet 11 of the gas electronic proportional valve and the fan 3 is between 350 mm and 400 mm.

[0125] In the present embodiment, based on the requirement that the length of the pipe between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is less than 5 times the diameter of the gas outlet pipe 2, and the relationship between the length of the pipe between the inlet of the detection member 4 and the fan 3 and the diameter of the gas outlet pipe 2, the length of the pipe between the outlet 11 of the gas electronic proportional valve and the suction inlet of the fan 3 is set to be 5-20 times the diameter of the gas outlet pipe 2.

[0126] In addition, based on the requirement that the length of the pipe between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve is within 100 mm, and the length of the pipe between the inlet of the detection member 4 and the fan 3 is between 310 mm and 320 mm, and the requirements that the distance between the inlet of the detection member 4 and the outlet 11 of the gas electronic proportional valve and the distance between the inlet of the detection member 4 and the suction inlet of the fan 3 are respectively within 100 mm and 310-320 mm, the length of the pipe between the outlet 11 of the gas electronic proportional valve and the fan 3 is between 350 mm and 400 mm.

[0127] The above specific boundary values are mainly based on the boundary set by the structure of the gas stove under the current general specification. In the present embodiment, some special specifications of gas stoves are not excluded, which may break through the corresponding value range of any pipe length due to special setting needs or directly ignoring the influence of the length of the gas outlet pipe 2 and the volume of the gas stove.

[0128] Please refer to Figures 2 to 3 In some embodiments, part of the gas can flow from the inlet 51 of the pressure stabilizing structure, flow through the flow stabilizing channel 52, and then flow into the inlet of the detection member 4.

[0129] In the present embodiment, in the direction of gas flow, the pressure stabilizing structure 5 can be located upstream of the inlet of the detection member 4.

[0130] Specifically, the pressure stabilizing structure 5 has a pressure stabilizing structure body 50, which is located in the gas outlet pipeline 2, and a predetermined distance is formed between the outer surface of the pressure stabilizing structure body 50 and the part of the inner surface of the gas outlet pipeline 2 to form the flow stabilizing channel 52. The pressure stabilizing structure inlet 51 is arranged through the pressure stabilizing structure body 50. In some embodiments, the pressure stabilizing structure outlet can be arranged through the gas outlet pipeline 2. Alternatively, in some embodiments, the pressure stabilizing structure outlet can be formed by the flow stabilizing channel 52 at the end position, and the gas outlet pipeline 2 is provided with a through hole mainly used for mounting the inlet of the detection member 4.

[0131] In the present embodiment, the pressure stabilizing structure body 50 can be a relatively independent component, which cooperates with the gas outlet pipeline 2 to form the flow stabilizing channel 52. The through hole arranged through the side wall of the pressure stabilizing structure body 50 is used as the pressure stabilizing structure inlet 51 for guiding part of the gas into the flow stabilizing channel 52. The through hole arranged through the side wall of the gas outlet pipeline 2 is used as the pressure stabilizing structure outlet for cooperating with the inlet of the detection member 4 to guide the part of the gas stabilized by the flow stabilizing channel 52 to the detection member 4.

[0132] Specifically, the pressure stabilizing structure body 50 can be annular as a whole and embedded in the gas outlet pipeline 2. Further, the pressure stabilizing structure body 50 can be in the form of a circular ring. When the pressure stabilizing structure body 50 is in the form of a circular ring, the inner surface thereof can be formed with a cylindrical hole having a flow cross section matching the gas outlet pipeline 2, so as not to affect the flow of the main part of the gas in the gas outlet pipeline 2; and the outer surface thereof can cooperate with the inner surface of the gas outlet pipeline 2 to form the flow stabilizing channel 52.

[0133] Of course, in other embodiments, the pressure stabilizing structure body 50 can also have other configurations, for example, the pressure stabilizing structure body 50 is spliced by multiple parts in the circumferential direction and / or the axial direction, or the pressure stabilizing structure body 50 can be provided with notches in the circumferential direction, etc. Of course, the specific configuration of the pressure stabilizing structure body 50 can also be other ways, and is not limited to the above description. Those skilled in the art can also make other changes under the inspiration of the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, which should be covered in the protection scope of the present application.

[0134] In some embodiments, the outer surface of the pressure stabilizing structure body 50 and / or the part of the inner surface of the gas outlet pipeline 2 is formed with a gas flow guide groove 501.

[0135] In the embodiment, the outer surface of the pressure stabilizing structure body 50 facing the gas outlet pipeline 2 can be provided with a gas flow guide groove 501, or the inner surface of the pipe section of the gas outlet pipeline 2 for mounting the pressure stabilizing structure body 50 can be provided with a gas flow guide groove 501, or the outer surface of the pressure stabilizing structure body 50 facing the gas outlet pipeline 2 and the inner surface of the pipe section of the gas outlet pipeline 2 for mounting the pressure stabilizing structure body 50 are both provided with a gas flow guide groove 501. The gas flow guide groove 501 can be used to form the flow stabilizing channel 52. When part of the gas flow enters the gas flow guide groove 501 through the pressure stabilizing structure inlet 51, the flow direction and flow speed of the gas can be effectively controlled, and the gas is stabilized by the gas flow guide groove 501, thereby improving the pressure taking accuracy.

[0136] As shown in Figure 6 , further, the gas flow guide groove 501 is provided with a stop portion 502, which is used to change the flow direction of the gas.

[0137] In the embodiment, by providing the stop portion 502 in the gas flow guide groove 501, the gas entering the gas flow guide groove 501 can be guided to a specified flow path. Specifically, when the gas flows through the stop portion 502, its flow direction and flow speed are forced to change and flow in the direction guided by the stop portion 502, so that the flow direction and flow speed of the gas tend to be uniform, achieving the purpose of improving the pressure taking accuracy.

[0138] The specific form of the stop portion 502 can be a plurality of baffles independently provided in the gas flow guide groove 501, or the stop portion 502 can be a plurality of baffles with one end in contact with the inner wall of the gas flow guide groove 501. The extension direction of the baffle forms a predetermined angle with the overall extension direction of the gas flow guide groove 501, so that the gas in the gas flow guide groove 501 can change the flow direction multiple times under the guidance of the baffle. Of course, the specific form of the stop portion 502 is not limited to the above examples, and those skilled in the art can make other changes under the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, which should be covered by the protection scope of the present application.

[0139] In one specific scenario, the flow control of the gas is described by taking the stopper 502 arranged independently in the gas guide groove 501 as an example. The stopper 502 cooperates with the edge of the gas guide groove 501 to form two different flow paths in the gas guide groove 501. The first flow path is located in the middle of the gas guide groove 501, and the second flow path is located between the edge of the gas guide groove 501 and the stopper 502. The first flow path and the second flow path form a convergence point at the position where the stopper 502 is arranged. During the flow of the gas in the gas guide groove 501, the gas will periodically converge. When converging, the overall flow rate of the gas can be accelerated, and it can be ensured that the gas reliably flows out of the pressure stabilizing structure outlet and is detected by the detection part of the detection piece 4. In addition, the periodic convergence can also ensure that the flow rate of the fluid tends to be uniform.

[0140] In some specific embodiments, the edge of the gas guide groove 501 is reversely formed with an arc-shaped guide part 503 and / or a fold line guide part 504.

[0141] As shown in FIG. 1, in one specific embodiment, the edge of the gas guide groove 501 is reversely formed with an arc-shaped guide part 503. Figure 4

[0142] In this embodiment, the edge of the gas guide groove 501 can be composed of a plurality of periodically and alternately reversely formed circular arcs. When the gas flows through the gas guide groove 501, part of the gas collides with the edge of the gas guide groove 501, and its flow direction and flow rate are forced to change, and flow in the direction guided by the arc-shaped guide part 503, so that the flow direction and flow rate of the gas tend to be uniform, achieving the purpose of improving the pressure taking precision.

[0143] As shown in FIG. 1, in one specific embodiment, the edge of the gas guide groove 501 is reversely formed with a fold line guide part 504. Figure 5 Figure 6

[0144] In this embodiment, the edge of the gas guide groove 501 can be composed of a plurality of periodically and alternately reversely formed line segments. When the gas flows through the gas guide groove 501, part of the gas collides with the edge of the gas guide groove 501, and its flow direction and flow rate are forced to change, and flow in the direction guided by the fold line guide part 504, so that the flow direction and flow rate of the gas tend to be uniform, achieving the purpose of improving the pressure taking precision.

[0145] Alternatively, in one specific embodiment, the edge of the gas guide groove 501 is reversely formed with an arc-shaped guide part 503 and a fold line guide part 504.

[0146] ​​​In the embodiment, the edge of the gas guide groove 501 can be an integration of the arc-shaped guide portion 503 and the fold line guide portion 504. For example, the edge of the gas guide groove 501 can be composed of alternately arranged circular arcs and line segments; or the edge of the gas guide groove 501 is partially composed of a plurality of periodically alternating circular arcs and a plurality of periodically alternating line segments.

[0147] Of course, the specific structure of the edge of the gas guide groove 501 is not limited to the above examples. Those skilled in the art can make other changes under the inspiration of the technical essence of the present application, as long as the functions and effects achieved are the same or similar to those of the present application, which should be covered by the protection scope of the present application.

[0148] In one embodiment, the number of the pressure stabilizing structure inlets 51 is multiple, and the multiple pressure stabilizing structure inlets 51 are multiple openings arranged at intervals.

[0149] It is considered that the gas can be entrained with particulate impurities. When the pressure stabilizing structure 5 is in use, the pressure stabilizing structure inlets 51 are first contacted with the gas, and the particulate impurities entrained in the gas can be blocked at the pressure stabilizing structure inlets 51. In the embodiment, the pressure stabilizing structure inlets 51 can be provided with multiple openings. Specifically, the multiple pressure stabilizing structure inlets 51 can be multiple openings arranged at intervals. The multiple openings are beneficial to ensure that at least one or several openings can be used for the gas to flow into the flow stabilizing channel 52 when one or several openings are blocked. That is, by providing multiple openings, the reliability of the pressure stabilizing structure 5 in use can be improved, and the failure rate can be reduced.

[0150] Further, the opening area of the pressure stabilizing structure inlet 51 is smaller than the opening area of the pressure stabilizing structure outlet.

[0151] In the embodiment, the opening area of the pressure stabilizing structure inlet 51 can be relatively small. The pressure stabilizing structure inlet 51 with a small opening area can intercept the particulate impurities entrained in the gas, which is equivalent to filtering the particulate impurities in the gas, so that the particulate impurities contained in the gas entering the flow stabilizing channel 52 are less, which will not affect the reliability of the flow stabilizing channel 52 in use. In addition, considering that the opening area of the inlet of the detection member 4 is small, after the particulate impurities in the gas are intercepted by the pressure stabilizing structure inlet 51, the risk of the particulate impurities in the gas blocking the inlet of the detection member 4 can be reduced, thereby improving the reliability of pressure taking.

[0152] The openings of the pressure stabilizing structure inlets 51 are arranged at different heights. For example, the openings of the pressure stabilizing structure inlets 51 are arranged at different heights along the height direction. Impurities in the fuel gas generally deposit downwards. Even if the impurities deposited block the openings at the lower part, the openings at the upper part can still ensure the reliable entry of the fuel gas, reduce the risk of the openings being blocked at the same time, and ensure that the detection member 4 can perform reliable detection.

[0153] In a specific embodiment, the opening area of the pressure stabilizing structure inlets 51 at the lower part is smaller than the opening area of the pressure stabilizing structure inlets 51 at the upper part along the height direction, or the opening area of the pressure stabilizing structure inlets 51 gradually decreases from top to bottom. The maximum value of the opening area of the pressure stabilizing structure inlets 51 at the highest position is not greater than 7 square millimeters.

[0154] In the embodiment, the inlet of the pressure stabilizing structure 5 can be located at the lower part as a whole, and the outlet of the pressure stabilizing structure 5 can be located at the upper part as a whole. When the opening area of the pressure stabilizing structure inlets 51 at the lower part is smaller than the opening area of the pressure stabilizing structure inlets 51 at the upper part, the risk of the pressure stabilizing structure inlets 51 at the upper part being blocked can be reduced. In addition, when the opening area of the pressure stabilizing structure inlets 51 gradually increases from bottom to top, the risk of the openings being blocked gradually decreases from top to bottom, and thus the openings at the upper part are less likely to be blocked, and part of the fuel gas can enter the pressure stabilizing structure 5 through the openings. Even if the opening at the highest position has a maximum opening area of 7 square millimeters or less, the particulate impurities in the fuel gas can be effectively intercepted.

[0155] Please refer to Figures 1 to 3 In an embodiment, the fuel gas outlet pipeline 2 has a connecting member 6 connected to the outlet 11 of the fuel gas electronic proportional valve. The inlet of the detection member 4 is arranged on the connecting member 6. The connecting member 6 has a connecting port 62 in communication with the inlet of the detection member 4. The pressure stabilizing structure body 50 is located in the connecting member 6. The pressure stabilizing structure body 50 has a predetermined distance from part of the inner surface of the connecting member 6 to form the flow stabilizing channel 52.

[0156] In the embodiment, the fuel gas outlet pipeline 2 can be provided with a connecting member 6 for connecting the fuel gas outlet pipeline 2 to the outlet 11 of the fuel gas electronic proportional valve. The difference from the above-mentioned embodiment is that the pressure stabilizing structure body 50 is located in the connecting member 6. The connecting member 6 can replace the section of the fuel gas outlet pipeline 2 used to install the pressure stabilizing structure body 50 in the above-mentioned embodiment.

[0157] For the gas outlet pipeline 2, it is generally required to be provided with a connecting mechanism between the gas electronic proportional valve 1 to ensure reliable sealing butt joint. Specifically, the connecting mechanism can be a flange mechanism, and the connecting piece 6 can be in the form of a flange. When the connecting piece 6 is in the form of a flange, the steady flow channel 52 can be annular as a whole.

[0158] Specifically, a connecting port 62 is formed in the side wall of the connecting piece 6 and is in communication with the inlet of the detection piece 4. The pressure stabilizing structure body 50 can be embedded in the connecting piece 6, and a predetermined distance is formed between the outer surface of the pressure stabilizing structure body 50 and the part of the inner surface of the connecting piece 6 to form the steady flow channel 52. In some embodiments, the pressure stabilizing structure outlet can be formed by the steady flow channel 52 at the end position, and the connecting port 62 of the connecting piece 6 can be located downstream of the pressure stabilizing structure outlet in the gas flow direction.

[0159] Alternatively, in other embodiments, the connecting port 62 on the connecting piece 6 can be the pressure stabilizing structure outlet. When the connecting port 62 on the connecting piece 6 is the pressure stabilizing structure outlet, the connecting port 62 can be a convex interface on the connecting surface of the connecting piece 6 and the detection piece 4, and at least part of the inlet of the detection piece 4 can be sleeved on the periphery of the interface. The specific form of the pressure stabilizing structure body 50 and the specific form of the steady flow channel 52 can refer to the specific description of the above embodiments, which will not be described here.

[0160] In one embodiment, the steady flow channel 52 can include at least two parallel sub-steady flow channels. Part of the gas can flow from the pressure stabilizing structure inlet 51, flow through the at least two parallel sub-steady flow channels, and be detected by the detection part of the detection piece 4 after flowing out of the pressure stabilizing structure outlet.

[0161] In the present embodiment, the steady flow channel 52 can also include at least two sub-steady flow channels. In the embodiments of the present application, the first sub-steady flow channel and the second sub-steady flow channel are taken as examples. When the number of sub-steady flow channels is more, it can be analogized based on the embodiments of the present application, which will not be described one by one here. The first sub-steady flow channel and the second sub-steady flow channel can be communicated with the inlet of the detection piece 4 after being gathered at the pressure stabilizing structure outlet, or the first sub-steady flow channel and the second sub-steady flow channel can be communicated with the inlet of the detection piece 4 without being gathered at the pressure stabilizing structure outlet. The pressure stabilizing structure body 50 is provided with a first opening hole communicated with the first sub-steady flow channel and a second opening hole communicated with the second sub-steady flow channel, and the first opening hole and the second opening hole are used as the inlet of the pressure stabilizing structure 5. The first sub-steady flow channel and the second sub-steady flow channel are communicated with the connecting port 62 on the connecting piece 6.

[0162] When one of the two sub-steady flow channels is disabled due to blockage or the like, the other sub-steady flow channel can still flow gas, thereby ensuring the reliability of pressure taking.

[0163] As shown in Figure 7 The side of the pressure stabilizing structure body 50 abuts against the end face of the outlet 11 of the gas electronic proportional valve, and the inside of the connecting piece 6 is provided with a limiting part 61, and the other side of the pressure stabilizing structure body 50 abuts against the limiting part 61.

[0164] In this embodiment, the pressure stabilizing structure body 50 can be annular with a certain thickness, and the side along the thickness direction of the pressure stabilizing structure body 50 can abut against the end face of the outlet 11 of the gas electronic proportional valve, and the other side can abut against the limiting part 61 inside the connecting piece 6, thereby realizing positioning in the thickness direction.

[0165] Specifically, the inside of the connecting piece 6 can be formed with a stepped hole, and the variable-diameter part of the stepped hole forms a limiting part for abutting against the pressure stabilizing structure body 50. The stepped hole part of the connecting part has a relatively large first hole diameter and a relatively small second hole diameter, wherein the first hole diameter position corresponds to a first hole section for mounting the pressure stabilizing structure body 50, and the first hole diameter can be the same as or close to the outer diameter of the pressure stabilizing structure body 50, and when the pressure stabilizing structure body 50 is mounted in the first hole section, the two can be zero-gap or small-gap fitted. The second hole diameter can be the same as or close to the inner diameter of the pressure stabilizing structure body 50, so that the gas flowing through the transition position of the pressure stabilizing structure body 50 and the connecting piece 6 is not disturbed.

[0166] Of course, the specific form of the limiting part 61 is not limited to the above distance, for example, the limiting part 61 can also be a local protrusion formed on the inner surface of the connecting piece 6, or the specific arrangement of the limiting part 61 can also be other ways, which are not limited to the above description, and those skilled in the art can also make other changes under the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, which should be covered within the protection scope of the present application.

[0167] In one embodiment, the gas supply system further comprises a sealing member for sealing the gap between the pressure stabilizing structure body 50 and the connecting piece 6, and the sealing member is arranged between the connecting piece 6 and the outlet of the gas electronic proportional valve 1.

[0168] In the embodiment, there can be a gap between the pressure stabilizing structure body 50 and the connecting piece 6, preventing the gas from flowing directly from the gap between the pressure stabilizing structure body 50 and the connecting piece 6 into the inlet of the detecting piece 4, and thus preventing the situation that the gas cannot be stabilized by the pressure stabilizing structure 5. The gas supply system can further comprise a sealing piece. Specifically, the sealing piece can be arranged between the connecting piece 6 and the outlet of the gas electronic proportional valve 1. The sealing piece can be annular in whole, and the projection of the sealing piece towards the connecting piece 6 can cover the gap between the pressure stabilizing structure body 50 and the connecting piece 6. When the connecting piece 6 is in the form of a flange, since a sealing piece is generally arranged at the abutting position of the two flanges when the two flanges are abutted, the sealing piece can borrow the sealing piece of the flange mechanism.

[0169] Referring to Figure 8 and Figure 9 In some other embodiments, the pressure stabilizing structure 5 is arranged in the detecting piece 4, and the pressure stabilizing structure 5 is located outside the gas outlet pipeline 2. The gas flowing from the inlet of the detecting piece 4 can be detected by the detecting part of the detecting piece 4 after flowing through the pressure stabilizing structure 5.

[0170] In the embodiment, the pressure stabilizing structure 5 can be arranged in the detecting piece 4. The detecting piece 4 is located outside the gas outlet pipeline 2 in whole. Correspondingly, the pressure stabilizing structure 5 is also arranged outside the gas outlet pipeline 2.

[0171] The gas outlet pipeline 2 can be provided with an opening for mounting the inlet of the detecting piece 4. The inlet of the detecting piece 4 can be sealingly arranged in the opening. Part of the gas flowing in the gas outlet pipeline 2 can enter the detecting piece 4 through the inlet of the detecting piece 4, and then be detected by the detecting part of the detecting piece 4 after being stabilized by the pressure stabilizing structure 5.

[0172] Specifically, as Figure 9 shown, the stabilizing channel 52 of the pressure stabilizing structure 5 comprises a curved flow passage 505 capable of changing the flowing direction of the gas.

[0173] In the embodiment, the pressure stabilizing structure 5 can be a hollow structure with a through stabilizing channel 52 arranged inside. The external structure of the pressure stabilizing structure 5 is not limited in the present application, for example, it can be a cuboid type for easy processing and manufacturing, and of course it can also be in other forms for easy processing and manufacturing, such as a cylindrical type. In addition, the pressure stabilizing structure 5 can be in a split structure or in an integrated structure, and the present application does not make a unique limitation here.

[0174] The steady flow channel 52 can specifically be a curved flow channel 505 capable of changing the flow direction of the gas. The curved flow channel 505 can include a plurality of bends, and the flow direction of the gas will change when the gas flows through the plurality of bends. In addition, the speed of the gas will also change. When the gas flows through the plurality of bends, the flow direction and speed of the gas will be changed multiple times, and finally, when the gas is output from the steady flow channel 52, the flow direction and speed of the gas can be basically uniform.

[0175] The form of the bend can be an arc-shaped bend as shown in the figure, but can also be a straight-line bend, or a combination of the two. Specifically, the present application is not limited to this.

[0176] As shown in the figure, Figures 1 to 3 In one embodiment, the gas outlet pipeline 2 has a connecting piece 6 for connecting with the outlet 11 of the gas electronic proportional valve. The inlet of the detection piece 4 is arranged on the connecting piece 6, and the connecting piece 6 has a connecting port 62 in communication with the inlet of the detection piece 4.

[0177] In the present embodiment, the gas outlet pipeline 2 can be provided with a connecting piece 6 for connecting the gas outlet pipeline 2 with the outlet 11 of the gas electronic proportional valve. The specific form of the connecting piece 6 can refer to the specific description of the above-mentioned embodiment, and the present application will not be repeated here.

[0178] The connecting piece 6 can be provided with a connecting port 62 in communication with the inlet of the detection piece 4; the inlet of the detection piece 4 is used to cooperate with the connecting port 62 of the connecting piece 6. Specifically, the inlet of the detection piece 4 can be provided with a threaded joint, and the connecting port 62 of the connecting piece 6 can be provided with a threaded hole matched with the threaded joint. Of course, the specific cooperation mode of the inlet of the detection piece 4 and the connecting port 62 of the connecting piece 6 is not limited to the threaded cooperation structure, and it can also be other assembly modes, and the present application does not make specific limitation here.

[0179] In some embodiments, the gas electronic proportional valve 1 has a valve body and a gas outlet portion 21 integrally formed with the valve body. The gas outlet portion 21 is connected with the gas outlet pipeline 2, and the inlet of the detection piece 4 is arranged on the gas outlet portion 21.

[0180] In the present embodiment, the main difference from the above-mentioned embodiment is the arrangement position of the inlet of the detection piece 4. Specifically, the inlet of the detection piece 4 can be arranged at the gas outlet portion 21 of the gas electronic proportional valve 1.

[0181] Further, the gas outlet part 21 has a connecting part for connecting with the gas outlet pipeline 2, and the inlet of the detecting part 4 is arranged in the connecting part. Specifically, the connecting part can have the same form as the connecting part 6 of the gas outlet pipeline 2 in the above embodiment. For example, when the connecting part 6 is in the form of a flange, the connecting part can also be in the form of a flange.

[0182] In one embodiment, the gas supply system further comprises a pressure stabilizing structure 5, which is arranged inside the connecting part, and has a pressure stabilizing structure inlet 51, a flow stabilizing channel 52 and a pressure stabilizing structure outlet. Part of the gas flowing through the connecting part can flow into the pressure stabilizing structure inlet 51, flow stably through the flow stabilizing channel 52, flow out of the pressure stabilizing structure outlet, and then flow into the inlet of the detecting part 4 to be detected by the detecting part 4.

[0183] In this embodiment, the pressure stabilizing structure 5 can be arranged in the connecting part. Specifically, the pressure stabilizing structure 5 can have the same form as the pressure stabilizing structure 5 arranged in the connecting part 6 in the above embodiment, and the specific form of the pressure stabilizing structure 5 can also refer to the specific description of the above embodiment, which will not be described here. Part of the gas flowing through the connecting part can flow into the pressure stabilizing structure inlet 51, flow stably through the flow stabilizing channel 52, flow out of the pressure stabilizing structure outlet, and then flow into the inlet of the detecting part 4 to be detected by the detecting part 4.

[0184] In another embodiment, the gas supply system further comprises a pressure stabilizing structure 5, which is arranged outside the connecting part and inside the detecting part 4, and has a pressure stabilizing structure inlet 51, a flow stabilizing channel 52 and a pressure stabilizing structure outlet. Part of the gas flowing through the connecting part can flow into the pressure stabilizing structure inlet 51, flow stably through the flow stabilizing channel 52, flow out of the pressure stabilizing structure outlet, and then flow into the inlet of the detecting part 4 to be detected by the detecting part 4.

[0185] In this embodiment, the pressure stabilizing structure 5 can be arranged outside the connecting part and inside the detecting part 4. Specifically, the pressure stabilizing structure 5 can have the same form as the pressure stabilizing structure 5 arranged outside the connecting part and inside the detecting part 4 in the above embodiment, and the specific form of the pressure stabilizing structure 5 can also refer to the specific description of the above embodiment, which will not be described here. Part of the gas flowing through the connecting part can flow into the pressure stabilizing structure inlet 51, flow stably through the flow stabilizing channel 52, flow out of the pressure stabilizing structure outlet, and then flow into the inlet of the detecting part 4 to be detected by the detecting part 4.

[0186] The gas stove provided in the embodiments of the present application mainly comprises the above-mentioned gas supply system, and the gas stove can achieve the technical effects achieved by the gas supply system, and specific descriptions can be made with reference to the specific descriptions of the above-mentioned embodiments, which will not be repeated here.

[0187] As shown in Figure 10 In the embodiments, the gas stove further comprises a housing 7. Due to the reasonable arrangement of the inlet position of the detection member 4 in the above-mentioned gas supply system and the arrangement of the pressure stabilizing structure 5, the length of the flow channel from the inlet of the detection member 4 to the gas electronic proportional valve 1 can be shortened, so that the gas electronic proportional valve 1 can be arranged closer to the fan 3, and the gas electronic proportional valve 1 of the gas supply system can be arranged in the housing 7.

[0188] In some embodiments, the gas stove can further comprise a controller, which is in communication connection with the fan 3 and the detection member 4, and the gas electronic proportional valve 1 is in communication connection with the detection member 4.

[0189] In the embodiments, the gas stove can further comprise a controller, which can obtain the gas pressure and / or flow of the detection member 4 and the operating parameters of the fan 3 through communication with the fan 3 and the detection member 4.

[0190] Further, the detection part of the detection member 4 is arranged on the computer board of the gas electronic proportional valve 1, the gas flowing into the inlet of the detection member 4 is guided to the detection part through a hose, and the controller is in communication connection with the detection part on the computer board of the gas electronic proportional valve 1.

[0191] In the embodiments, the gas electronic proportional valve 1 is provided with a computer board, and the detection part of the detection member 4 can be arranged on the computer board of the gas electronic proportional valve 1. The inlet of the detection member 4 can be communicated to the detection part through a hose. During specific detection, the gas with stable flow can flow into the inlet of the detection member 4, be guided to the detection part through the hose, be detected by the detection part, and the pressure and / or flow signal of the gas detected by the detection part can be sent to the controller after being converted into an electric signal by a converter.

[0192] In the embodiments of the present application, the flow area of the inlet of the detection member 4 of the gas stove is less than a preset value. Specifically, the opening diameter of the inlet of the detection member 4 is between 0.5 mm and 1.0 mm. Generally, the inlet of the detection member 4 is a circular hole, and the diameter of the circular hole can be between 0.5 mm and 1.0 mm. For the inlet of the existing detection member 4, the structure and size are generally relatively fixed. In the embodiments of the present application, the inlet of the detection member 4 can also be made into other structures or other cross-sectional sizes in the prior art.

[0193] The inventor of the present application finds that when the inlet flow passage area of the detection piece 4 is small, the inlet of the detection piece 4 is easy to be blocked. Once the inlet of the detection piece 4 is blocked, the controller cannot obtain the blockage of the inlet of the detection piece 4 in time, which directly affects the pressure taking accuracy, resulting in that the gas pressure and / or flow rate fed back by the detection piece 4 is inaccurate.

[0194] As shown in Figure 11 The control method of the gas stove provided in the embodiment of the present application can include the following steps:

[0195] Step S10: When the gas stove is started for the first time, at least control the fan 3 to run at a first load, and at least obtain first detection data through the detection piece 4, compare the first detection data with first preset data, if the first detection data matches the first preset data, it is confirmed that the inlet of the detection piece 4 is not blocked when the gas stove is started for the first time, and the gas stove is normally ignited and operated.

[0196] Step S12: When the gas stove is started subsequently, control the fan 3 to run at the first load, and obtain second detection data through the detection piece 4, compare the second detection data with the first detection data, if the second detection data matches the first detection data, it is confirmed that the inlet of the detection piece 4 is not blocked when the gas stove is started subsequently, and the gas stove is normally ignited and operated.

[0197] In the embodiment, the first load is the load required in the pre-cleaning stage of the gas stove, and the step of confirming that the inlet of the detection piece 4 is not blocked when the gas stove is started subsequently includes: when the gas stove is started subsequently, control the fan 3 to pre-clean at the first load, and obtain second detection data through the detection piece 4 in the pre-cleaning stage, compare the second detection data with the first detection data, if the second detection data matches the first detection data, it is confirmed that the inlet of the detection piece 4 is not blocked when the gas stove is started subsequently.

[0198] In step S10 of the embodiment, when the gas stove is first started, the gas stove can be pre-cleaned to replace the gas in the gas stove with air. During the pre-cleaning, the detection member 4 (for example, a pressure sensor) can be used to obtain first detection data, for example, a first negative pressure value P1. The controller of the gas stove can store first preset data, which can be a preset negative pressure value P0 stored in the controller in advance. The preset negative pressure value P0 can be obtained by experiments on multiple gas stoves after machine performance testing, when the fan 3 is started at a first load to pre-clean the gas stove.

[0199] When the first detection data is obtained, the first detection data can be compared with the first preset data, for example, the first negative pressure value P1 is compared with the preset negative pressure value P0. If the P1 is within the range of P0±p, it means that the inlet of the detection member 4 is probably not blocked, and the gas stove can be normally ignited at this time. The first load can be the highest load of the fan 3, and the load of the fan 3 is proportional to the speed of the fan 3. Pre-cleaning the fan 3 with the highest load can complete the pre-cleaning work faster. Of course, in the embodiment of the application, the fan 3 can also be pre-cleaned with a load less than the highest load.

[0200] The controller can save the first detection data obtained when the gas stove is first started as a comparison reference for the next pre-cleaning before the gas stove is started.

[0201] In step S12 of the embodiment, when the gas stove is subsequently started, the fan 3 is controlled to operate at the first load, and the second detection data (for example, a second negative pressure value P2) is obtained by the detection member 4. The second detection data is compared with the first detection data, for example, the second negative pressure value P2 is compared with the first negative pressure value P1. If the second detection data matches the first detection data, for example, if the P2 is within the range of P1±p, it is confirmed that the inlet of the detection member 4 is not blocked when the gas stove is subsequently started, and the gas stove can be normally ignited.

[0202] In the embodiment of the application, the controller of the gas stove can obtain the pressure in the gas outlet pipeline 2 near or at the outlet of the gas electronic proportional valve 1 through the pre-cleaning stage to determine the blocking condition of the inlet of the detection member 4. Once the blocking of the inlet of the detection member 4 is found, troubleshooting can be performed first, so that the problems such as explosion when starting and failure to start can be avoided.

[0203] Generally, when the detection piece 4 is blocked, the detection part of the detection piece 4 cannot obtain the first detection data, or the obtained first detection data can be much smaller. In addition, there can be some special cases, for example, when the detection piece 4 is blocked or the detection piece 4 directly fails, the detection signal transmitted to the controller is a certain fixed negative pressure value, which is close to the preset negative pressure value. At this time, only by using the above steps, the problem of blockage or failure of the detection piece 4 cannot be 100% identified.

[0204] In order to exclude the above situation and improve the accuracy of judgment, the step of confirming that the detection piece 4 is not blocked when the gas stove is started for the first time can be specifically:

[0205] When the gas stove is started for the first time, the fan 3 is controlled to run at a first load, and the first detection data is obtained through the detection piece 4. The first detection data is compared with the first preset data. If the first detection data matches the first preset data, the fan 3 is controlled to run at a second load different from the first load, and the third detection data is obtained through the detection piece 4. The third detection data is compared with the second preset data. If the third detection data still matches the second preset data, it is confirmed that the inlet of the detection piece 4 is not blocked when the gas stove is started for the first time.

[0206] That is, after step S10, the load (speed) of the fan 3 can also be changed, and the fan 3 is controlled to run at a second load. Since the first load is the load required in the pre-cleaning stage of the gas stove, the second load can be less than the first load. At this time, the third detection data such as the third negative pressure value P3 can be obtained through the detection piece 4, and the third detection data is compared with the second preset data. The second preset data can be a preset negative pressure value P4 stored in the controller. The preset negative pressure value P4 can be obtained by detecting the average value of the negative pressure value when the fan 3 is started at the second load through multiple gas stoves before the gas stove is factory-finished and the machine performance is qualified. Of course, the determination of the second preset data is not limited to the above example, and can also be determined by other ways, and is not limited to the above description. Those skilled in the art can also make other changes under the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, which should be covered by the protection scope of the present application.

[0207] When the third detection data is obtained, the third detection data is compared with the second preset data, for example, the third negative pressure value P3 is compared with the preset negative pressure value P4. If P3 is within P4±p, it indicates that the inlet of the current detection piece 4 is not blocked, and the detection piece 4 is also not failed.

[0208] It should be noted that in the description of the present application, the terms "first", "second" and the like are used only for the purpose of description and distinguishing similar objects, and there is no precedence or implied relative importance between them. In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0209] The above-mentioned various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly explains the difference from other embodiments.

[0210] The above is only a few embodiments of the present application, although the disclosed embodiments of the present application are as above, but the content is only for the purpose of understanding the present application and the adopted embodiment, not for limiting the present application. Any person skilled in the art of the present application, without departing from the spirit and scope of the present application, can make any modification and change in the form and details of the embodiments, but the patent protection scope of the present application shall be subject to the scope defined by the appended claims.

Claims

1. A gas supply system for a gas-fired furnace, characterized in that The gas supply system comprises a fan, a gas electronic proportional valve and a gas outlet pipeline connected with the outlet of the gas electronic proportional valve; after the fan is started, gas can flow into the gas electronic proportional valve and flow out of the gas outlet pipeline, and the gas flowing out of the gas outlet pipeline can be mixed with air for combustion; The gas supply system further comprises a detection member for detecting the flow and / or pressure of the gas, the gas electronic proportional valve can be adjusted in opening degree according to the detection result of the detection member, and the inlet of the detection member is arranged at the outlet of the gas electronic proportional valve or the inlet of the detection member is arranged on the gas outlet pipeline and close to the outlet of the gas electronic proportional valve.

2. The gas supply system for a gas stove as claimed in claim 1, wherein, The gas supply system further comprises a pressure stabilizing structure, the pressure stabilizing structure has a pressure stabilizing structure inlet, a flow stabilizing channel and a pressure stabilizing structure outlet, part of the gas can flow into the pressure stabilizing structure inlet, flow stably through the flow stabilizing channel and flow out of the pressure stabilizing structure outlet, and then be detected by the detection part of the detection member.

3. The gas supply system for a gas furnace according to claim 1 or 2, characterized in that: The inlet of the detection member is arranged on the gas outlet pipeline and close to the outlet of the gas electronic proportional valve, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is not more than 1 / 3 of the total length of the gas outlet pipeline.

4. A gas supply system for a gas stove as claimed in claim 1 or 2, characterized in that The inlet of the detection member is arranged on the gas outlet pipeline and close to the outlet of the gas electronic proportional valve, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is within 100 mm.

5. The gas supply system for a gas stove as claimed in claim 1 or 2, wherein The inlet of the detection member is arranged on the gas outlet pipeline and close to the outlet of the gas electronic proportional valve, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is less than 5 times the pipe diameter of the gas outlet pipeline.

6. A gas feeding system for a gas stove as claimed in claim 5, characterized in that The gas outlet pipeline between the inlet of the detection member and the outlet of the gas electronic proportional valve is a straight pipe section, and the pipeline length between the inlet of the detection member and the outlet of the gas electronic proportional valve is not more than 2.4 times the pipe diameter of the gas outlet pipeline.

7. A gas supply system for a gas stove as claimed in claim 1 or 2, characterized in that The pipeline length between the inlet of the detection member and the fan is not less than 5 times the pipe diameter of the gas outlet pipeline.

8. A gas supply system for a gas stove as claimed in claim 7, characterized in that The pipeline length between the outlet of the gas electronic proportional valve and the fan is 5-20 times the pipe diameter of the gas outlet pipeline, or the pipeline length between the outlet of the gas electronic proportional valve and the fan is between 350 mm and 400 mm.

9. The gas supply system for a gas stove as claimed in claim 7, wherein The pipeline length between the inlet of the detection member and the fan is 5-17.4 times the pipe diameter of the gas outlet pipeline, or the pipeline length between the inlet of the detection member and the fan is between 310 mm and 320 mm.

10. The gas supply system for a gas stove as claimed in claim 2, wherein, Part of the gas can flow into the pressure stabilizing structure inlet, flow stably through the flow stabilizing channel and flow out of the pressure stabilizing structure outlet, and then flow into the inlet of the detection member.

11. A gas supply system for a gas-fired furnace as defined in claim 10, wherein The pressure stabilizing structure has a pressure stabilizing structure body, the pressure stabilizing structure body is arranged in the gas outlet pipeline, there is a predetermined distance between the outer surface of the pressure stabilizing structure body and part of the inner surface of the gas outlet pipeline to form the flow stabilizing channel, and the pressure stabilizing structure inlet is arranged through the pressure stabilizing structure body.

12. A gas supply system for a gas-fired furnace as set forth in claim 11, wherein The stable pressure structure body is annular as a whole and is embedded in the gas outlet pipeline.

13. The gas supply system for a gas stove as claimed in claim 11, wherein A gas flow guide groove is formed on the outer surface of the stable pressure structure body and / or part of the inner surface of the gas outlet pipeline.

14. The gas supply system for a gas stove as claimed in claim 13, wherein A stop portion is arranged in the gas flow guide groove, which is used to change the flow direction of the gas.

15. The gas supply system for a gas stove as claimed in claim 13, wherein An arc-shaped flow guide portion and / or a zigzag flow guide portion is formed on the edge of the gas flow guide groove.

16. The gas supply system for a gas stove as claimed in claim 11, wherein The stable pressure structure has multiple inlets, which are multiple openings arranged at intervals.

17. The gas supply system for a gas stove as claimed in claim 11, wherein The opening area of the stable pressure structure inlet is smaller than that of the stable pressure structure outlet.

18. A gas supply system for a gas-fired furnace as set forth in claim 17, wherein The openings of at least part of the stable pressure structure inlets are arranged at different heights.

19. A gas supply system for a gas-fired furnace as set forth in claim 18, wherein In the height direction, the opening area of at least part of the stable pressure structure inlets at a lower position is smaller than that of at least part of the stable pressure structure inlets at a higher position, or the opening area of the stable pressure structure inlets gradually decreases from top to bottom.

20. The gas supply system for a gas stove as claimed in claim 11, wherein, The gas outlet pipeline has a connecting piece for connecting with the outlet of the gas electronic proportional valve, the inlet of the detection piece is arranged on the connecting piece, the connecting piece has a connecting port in communication with the inlet of the detection piece, the stable pressure structure body is located in the connecting piece, and a predetermined distance is formed between the outer surface of the stable pressure structure body and part of the inner surface of the connecting piece to form the stable flow channel.

21. A gas supply system for a gas-fired furnace as set forth in claim 20, wherein The connecting piece includes a flange, and the stable flow channel is annular as a whole.

22. A gas supply system for a gas-fired furnace as set forth in claim 21, wherein, The stable flow channel includes at least two parallel sub-stable flow channels, part of the gas can flow into the stable pressure structure inlet, be stably flowed through the at least two parallel sub-stable flow channels, and then be detected by the detection part of the detection piece after flowing out of the stable pressure structure outlet.

23. The gas supply system for a gas furnace according to claim 20, wherein: One side of the stable pressure structure body abuts against the end surface of the outlet of the gas electronic proportional valve, and the inside of the connecting piece is provided with a limiting portion, and the other side of the stable pressure structure body abuts against the limiting portion.

24. The gas supply system for a gas stove as claimed in claim 20, wherein, The gas supply system further includes a sealing piece for sealing the gap between the stable pressure structure body and the connecting piece, and the sealing piece is arranged between the connecting piece and the outlet of the gas electronic proportional valve.

25. The gas supply system for a gas stove as claimed in claim 2, wherein, The stable pressure structure is arranged in the detection piece, and the stable pressure structure is located outside the gas outlet pipeline, and the gas flowing into the inlet of the detection piece can be detected by the detection part of the detection piece after flowing through the stable pressure structure.

26. A gas supply system for a gas-fired furnace as set forth in claim 25, wherein The stable flow channel of the stable pressure structure includes a curved flow channel capable of changing the flow direction of the gas.

27. A gas supply system for a gas-fired furnace as set forth in claim 25, wherein The gas outlet pipeline has a connecting piece for connecting with the outlet of the gas electronic proportional valve, and the inlet of the detection piece is arranged on the connecting piece.

28. The gas supply system for a gas stove as claimed in claim 1, wherein, The gas electronic proportional valve has a valve body and a gas outlet portion integrally formed with the valve body, the gas outlet portion is connected with the gas outlet pipeline, and the inlet of the detection piece is arranged on the gas outlet portion.

29. A gas supply system for a gas-fired furnace as set forth in claim 28, wherein The gas outlet portion has a connecting portion for connecting with the gas outlet pipeline, and the inlet of the detection piece is arranged on the connecting portion.

30. A gas supply system for a gas-fired furnace as set forth in claim 29, wherein, The gas supply system further comprises a pressure stabilizing structure, which is located inside the connecting portion and has a pressure stabilizing structure inlet, a flow stabilizing channel and a pressure stabilizing structure outlet, part of the gas can flow into the pressure stabilizing structure inlet, flow through the flow stabilizing channel, and then flow out of the pressure stabilizing structure outlet, and then flow into the inlet of the detection member and be detected by the detection portion of the detection member.

31. A gas supply system for a gas-fired furnace as set forth in claim 29, wherein The gas supply system further comprises a pressure stabilizing structure, which is located outside the connecting portion and inside the detection member, and has a pressure stabilizing structure inlet, a flow stabilizing channel and a pressure stabilizing structure outlet, part of the gas can flow into the pressure stabilizing structure inlet, flow through the flow stabilizing channel, and then flow out of the pressure stabilizing structure outlet, and then be detected by the detection portion of the detection member.

32. The gas supply system for a gas stove as claimed in claim 1, wherein The detection member comprises a pressure sensor.

33. A gas burner, characterized in that The gas supply system of the gas stove of any one of claims 1 to 32, wherein all the gas electronic proportional valves of the gas supply system are arranged in the housing. The gas stove further comprises a controller, which is in communication connection with the fan and the detection member, and the gas electronic proportional valve is in communication connection with the detection member.

34. The gas furnace of claim 33, wherein The detection portion of the detection member is arranged on the computer board of the gas electronic proportional valve, the gas flowing into the inlet of the detection member is guided to the detection portion through a hose, and the controller is in communication connection with the detection portion on the computer board of the gas electronic proportional valve.

35. The gas furnace of claim 34, wherein The flow area of the inlet of the detection member is less than a preset value, and the control method comprises:

36. A method for controlling a gas furnace according to claim 34, characterized in that: When the gas stove is started for the first time, at least the fan is controlled to run at a first load, first detection data is obtained through the detection member, the first detection data is compared with first preset data, if the first detection data matches the first preset data, it is confirmed that the inlet of the detection member is not blocked when the gas stove is started for the first time, and the gas stove is normally ignited and operated; When the gas stove is started subsequently, the fan is controlled to run at the first load, second detection data is obtained through the detection member, and the second detection data is compared with the first detection data, if the second detection data matches the first detection data, it is confirmed that the inlet of the detection member is not blocked when the gas stove is started subsequently, and the gas stove is normally ignited and operated. The step of confirming that the detection member is not blocked when the gas stove is started for the first time comprises:

37. A control method of a gas stove as claimed in claim 36, characterized in that, When the gas stove is started for the first time, the fan is controlled to run at a first load, first detection data is obtained through the detection member, the first detection data is compared with first preset data, if the first detection data matches the first preset data, the fan is controlled to run at a second load different from the first load, third detection data is obtained through the detection member, and the third detection data is compared with second preset data, if the third detection data still matches the second preset data, it is confirmed that the inlet of the detection member is not blocked when the gas stove is started for the first time. ​ 38. A control method of a gas stove as claimed in claim 36, characterized in that, The first load is a load required for a pre-cleaning stage of the gas stove, the step of confirming that the inlet of the detection member is not blocked during subsequent start-up operation of the gas stove, in particular, During subsequent start-up operation of the gas stove, the fan is controlled to perform pre-cleaning at the first load, and second detection data is obtained by the detection member during the pre-cleaning stage. The second detection data is compared with the first detection data. If the second detection data matches the first detection data, it is confirmed that the inlet of the detection member is not blocked during subsequent start-up operation of the gas stove.

39. A control method of a gas stove as claimed in claim 36, characterized in that, The opening diameter of the inlet of the detection member is between 0.5 mm and 1.0 mm.

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