Gas combination valve with anti-dry burning function

Abstract

The present invention discloses a gas combination valve with an anti-dry burning function, comprising: an air inlet channel, an air outlet channel, a thermal expansion valve assembly, and a flameout protection switch valve; the thermal expansion valve assembly comprises an expansion valve body, an expansion valve core, and a temperature-sensitive bag arranged on a heated object; an expansion valve cavity is arranged in the expansion valve body; a medium in the temperature-sensitive bag can drive the expansion valve core to move when the medium expands due to heat; the flameout protection switch valve closes the air inlet channel or the air outlet channel when the flame of a gas burner is extinguished; when the heated object is dry-burned and reaches a certain temperature, the medium in the temperature-sensitive bag drives the expansion valve core to move to a position for closing the thermal expansion valve assembly to cut off the gas source, extinguish the flame, and prevent accidents; at the same time, the flameout protection switch valve cuts off the gas source after the flame is extinguished, which can prevent the thermal expansion valve assembly from opening the gas source after the temperature of the heated object and the temperature-sensitive bag is reduced, thereby preventing gas leakage, thereby further improving the safety of the use of gas equipment.

Description

Technical Field

[0001] The invention relates to the field of gas equipment, and in particular to a gas combination valve with an anti-dry burning function. Background Art

[0002] At present, gas appliances such as gas stoves and gas water heaters have been widely used. In order to improve the safety of gas equipment, gas equipment is basically equipped with flameout protection control components, which realize the function of flameout and closing the gas channel through thermocouples or probes. However, in actual use, there is still the problem of dry burning of the burner, such as the water in the pot drying up, the water heater being unable to fill with water, etc. If not handled properly, it will cause safety accidents. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a gas combination valve with an anti-dry burning function.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A gas combination valve with an anti-dry burning function comprises: an air inlet channel, an air outlet channel, a thermal expansion valve assembly, and a flameout protection switch valve; the thermal expansion valve assembly comprises an expansion valve body, an expansion valve core, and a temperature-sensing package arranged on a heated object; an expansion valve cavity connected to an air inlet channel or an air outlet channel is arranged in the expansion valve body; the expansion valve core is movably arranged in the expansion valve cavity; a medium in the temperature-sensing package can drive the expansion valve core to move when heated and expanded; the flameout protection switch valve can be connected to a flameout protection control assembly of a gas device and close the air inlet channel or the air outlet channel when the flame of a gas burner is extinguished.

[0006] One of the above technical solutions has at least one of the following advantages or beneficial effects: when the heated object (such as pots, heating water pipes of water heaters) is dry-burned, when the heated object and the temperature-sensing package reach a certain temperature, the medium in the temperature-sensing package drives the expansion valve core to move to the position of closing the thermal expansion valve assembly, thereby closing the air inlet channel or the air outlet channel to cut off the gas source, extinguish the flame, and prevent accidents; at the same time, the flameout protection switch valve also closes the air inlet channel or the air outlet channel to cut off the gas source after the flame is extinguished, which can avoid the thermal expansion valve assembly opening the gas source and causing gas leakage after the temperature of the heated object and the temperature-sensing package drops (the medium shrinks), further improving the safety of the use of gas equipment.

[0007] In some specific embodiments, the expansion valve core includes a sealing member that is slidably disposed in the expansion valve cavity and can seal the expansion valve cavity. The sealing member is provided with a driving cylinder and a piston member that slides with the driving cylinder. The piston member is fixedly connected to the expansion valve body. The temperature sensing bag is connected to the driving cylinder. The medium in the temperature sensing bag expands due to heat and can push the driving cylinder and the sealing member to move, so as to achieve the function of expansion drive, and the structure is compact.

[0008] In some specific embodiments, the temperature-sensing package is connected to the piston member through a connecting pipe and is connected to the driving cylinder through the piston member, so that the medium in the temperature-sensing package is connected to the cylinder body, and the structural layout is reasonable.

[0009] In some specific embodiments, a compression spring is arranged between the blocking member and the expansion valve body, and the compression spring can provide the blocking member with an elastic force to drive the blocking member to a position to block the valve cavity of the expansion valve, so as to assist the blocking member in blocking the valve cavity of the expansion valve, so as to maintain its good closing performance and ensure the normal anti-dry burning function.

[0010] In some specific embodiments, a step structure is provided in the valve cavity of the expansion valve, and the blocking member can be moved to cooperate with the step structure to block the valve cavity of the expansion valve, thereby having better sealing performance.

[0011] In some specific embodiments, a guide column is provided at the lower end of the blocking member, and a guide hole cooperating with the guide column is provided in the valve cavity of the expansion valve to ensure the movement accuracy of the blocking member and ensure its better closing performance.

[0012] In some specific embodiments, the flameout protection switch valve includes a solenoid valve arranged on the air intake passage. When the flame of the gas burner is extinguished, the solenoid valve closes the air intake passage, thereby achieving flameout protection.

[0013] In some specific embodiments, a gas flow control valve assembly is also included, which can control the gas flow between the air inlet channel and the air outlet channel to adjust the flame size, and integrate the thermal expansion valve and the flameout protection switch valve with the gas flow control valve to improve the compactness of the structure.

[0014] In some specific embodiments, the gas flow control valve assembly includes a flow control valve body and a valve core arranged in the flow control valve body, the flameout protection switch valve includes a solenoid valve, a long valve cavity is arranged in the flow control valve body, the valve core is arranged at the front end of the long valve cavity, the solenoid valve is arranged at the rear end of the long valve cavity, an air inlet is arranged in the middle of the long valve cavity, and the solenoid valve can cut off the connection between the air inlet and the front end of the long valve cavity. The thermal expansion valve assembly includes an expansion valve body arranged at the air inlet and an expansion valve core arranged in the expansion valve body, the air inlet channel is arranged on the expansion valve body, the expansion valve core can cut off the connection between the air inlet channel and the air inlet, the air outlet channel is arranged on one side of the front end of the flow control valve body, and the valve core can control the air outlet flow of the air outlet channel. The thermal expansion valve, the solenoid valve, the air inlet channel and the air outlet channel are integrated into one by using the flow control valve body, the structure is compact and reasonable, and maintenance and debugging are convenient.

[0015] In some specific embodiments, the solenoid valve is arranged at the rear end of the flow control valve body, the valve core is arranged at the front end of the flow control valve body, the thermal expansion valve assembly is arranged on one side of the flow control valve body, and the air outlet channel is arranged on the other side of the flow control valve body, which makes full use of the installation space, reduces the space occupied by the combination valve, and facilitates installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0018] Figure 2 It is a cross-sectional schematic diagram of a specific embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of an exploded view of a specific embodiment of the present invention. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] like Figure 1 As shown, a gas combination valve with an anti-dry burning function includes: an air inlet channel 11, an air outlet channel 12, a thermal expansion valve assembly 2, and a flameout protection switch valve; the thermal expansion valve assembly 2 includes an expansion valve body 22, an expansion valve core 23, and a temperature-sensing package 21 arranged on a heated object, an expansion valve cavity 24 connected to the air inlet channel 11 or the air outlet channel 12 is arranged in the expansion valve body 22, the expansion valve core 23 is movably arranged in the expansion valve cavity 24, and the medium in the temperature-sensing package 21 can drive the expansion valve core 23 to move when heated and expanded, and the flameout protection switch valve can be connected to the flameout protection control assembly of the gas equipment and close the air inlet channel 11 or the air outlet channel 12 when the flame of the gas burner is extinguished.

[0025] When the heated object (such as pots and the heating water pipes of water heaters) is dry-burned, when the heated object and the temperature-sensing package 21 reach a certain temperature, the medium in the temperature-sensing package 21 drives the expansion valve core 23 to move to the position of closing the thermal expansion valve assembly 2, thereby closing the air inlet channel 11 or the air outlet channel 12 to cut off the gas source, extinguish the flame, and prevent accidents; at the same time, the flameout protection switch valve also closes the air inlet channel 11 or the air outlet channel 12 to cut off the gas source after the flame is extinguished, which can avoid the thermal expansion valve assembly 2 opening the gas source and causing gas leakage after the temperature of the heated object and the temperature-sensing package 21 drops (the medium shrinks), further improving the safety of the use of gas equipment.

[0026] In some specific embodiments, such as Figure 2 , Figure 3As shown, the expansion valve core 23 includes a sealing member 231 which is slidably arranged in the expansion valve cavity 24 and can seal the expansion valve cavity 24. A driving cylinder 232 and a piston member 233 which slides with the driving cylinder 232 are arranged on the sealing member 231. The piston member 233 is fixedly connected to the expansion valve body 22. The temperature sensing package 21 is connected to the driving cylinder 232. The medium in the temperature sensing package 21 expands due to heat and can push the driving cylinder 232 and the sealing member 231 to move, so as to achieve the function of expansion drive, and the structure is compact.

[0027] Of course, in the specific implementation process, a cylinder body can also be set in the expansion valve body 22, a piston can be set in the cylinder body, and then the piston can be connected to the blocking member 231, and the temperature sensing bag 21 can be connected to the cylinder, which can also realize the driving function of the blocking member 231, which will not be described in detail here.

[0028] In some specific embodiments, such as Figure 2 , Figure 3 As shown, the temperature sensing package 21 is connected to the piston 233 through a connecting pipe 211 and is connected to the driving cylinder 232 through the piston 233, so that the medium in the temperature sensing package 21 is connected to the cylinder body, and the structural layout is reasonable.

[0029] In some specific embodiments, such as Figure 2 , Figure 3 As shown, a compression spring 234 is arranged between the blocking member 231 and the expansion valve body 22. The compression spring 234 can provide the blocking member 231 with an elastic force to drive the blocking member 231 to a position to block the expansion valve cavity 24, so as to assist the blocking member 231 in blocking the expansion valve cavity 24, so as to maintain its good closing performance and ensure the normal anti-dry burning function.

[0030] In some specific embodiments, such as Figure 2 , Figure 3 As shown, a step structure 241 is provided in the expansion valve cavity 24, and the blocking member 231 can move to cooperate with the step structure 241 to block the expansion valve cavity 24, thereby having good sealing performance.

[0031] In some specific embodiments, such as Figure 2 , Figure 3 As shown, a guide column 235 is provided at the lower end of the blocking member 231, and a guide hole 242 cooperating with the guide column 235 is provided in the expansion valve cavity 24 to ensure the movement accuracy of the blocking member 231 and ensure its good closing performance.

[0032] In some specific embodiments, such as Figure 2 , Figure 3As shown, the flameout protection switch valve includes a solenoid valve 31 arranged on the air intake passage 11. When the flame of the gas burner is extinguished, the flameout protection control component of the gas equipment can control the solenoid valve 31 to close the air intake passage 11, thereby achieving flameout protection.

[0033] In the specific implementation process, the flameout protection control component of the gas equipment may include a thermocouple or flame probe arranged at the flame position and a controller connected to the thermocouple or flame probe. When the thermocouple or flame probe detects that the flame is extinguished, the controller can control the solenoid valve 31 to close, thereby achieving flameout protection. The flameout protection control component of the gas equipment is relatively common in the field of gas equipment, and its specific control principle will not be described in detail here.

[0034] Of course, in the specific implementation process, the flameout protection switch valve can also be a mechanical valve or a mechanical switch valve driven by a motor, such as a plunger valve, a ball valve, etc., which will not be described in detail here.

[0035] In some specific embodiments, such as Figure 2 , Figure 3 As shown, it also includes a gas flow control valve assembly 4, which can control the gas flow between the air inlet channel 11 and the air outlet channel 12, realize the adjustment of the flame size, and integrate the thermal expansion valve and the flameout protection switch valve with the gas flow control valve to improve the compactness of the structure.

[0036] In some specific embodiments, such as Figure 3 As shown, the gas flow control valve assembly 4 includes a flow control valve body 41 and a valve core 42 disposed in the flow control valve body 41 , and flow regulation is achieved by adjusting the position of the valve core 42 .

[0037] Of course, in the specific implementation process, the valve core 42 can be a plug valve core (conical or truncated cone shape) or a ball valve core, which will not be described in detail here.

[0038] In some specific embodiments, such as Figure 2 , Figure 3As shown, the flameout protection switch valve includes a solenoid valve 31, a long valve cavity is arranged in the flow control valve body 41, the valve core 42 is arranged at the front end of the long valve cavity, the solenoid valve 31 is arranged at the rear end of the long valve cavity, and an air inlet 431 is arranged in the middle of the long valve cavity. The solenoid valve 31 can cut off the connection between the air inlet 431 and the front end of the long valve cavity. The thermal expansion valve assembly 2 includes an expansion valve body 22 arranged at the air inlet 431 and an expansion valve core 23 arranged in the expansion valve body 22. The air inlet channel 11 is arranged on the expansion valve body 22. The expansion valve core 23 can cut off the connection between the air inlet channel 11 and the air inlet 431. The air outlet channel 12 is arranged on one side of the front end of the flow control valve body 41. The valve core 42 can control the air outlet flow rate of the air outlet channel 12. The thermal expansion valve, the solenoid valve, the air inlet channel 11 and the air outlet channel 12 are integrated into one by using the flow control valve body. The structure is compact and reasonable, and it is convenient to maintain and debug.

[0039] In some specific embodiments, such as Figure 2 , Figure 3 As shown, the solenoid valve 31 is arranged at the rear end of the flow control valve body 41, the valve core 42 is arranged at the front end of the flow control valve body 41, the thermal expansion valve assembly 2 is arranged on one side of the flow control valve body 41, and the air outlet channel 12 is arranged on the other side of the flow control valve body 41, which makes full use of the installation space, reduces the space occupied by the combination valve, and facilitates installation and maintenance.

[0040] In some specific embodiments, such as Figure 2 As shown, a screen 432 is provided at the air inlet 431 to reduce accidental entry into the flow control valve.

[0041] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0042] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. Gas combination valve with anti-dry burning function, characterized in that: include: An air intake passage (11); An air outlet channel (12); A thermal expansion valve assembly (2), the thermal expansion valve assembly (2) comprising an expansion valve body (22), an expansion valve core (23), and a temperature-sensing package (21) disposed on a heated object, the expansion valve body (22) being provided with an expansion valve cavity (24) connected to an air inlet passage (11) or an air outlet passage (12), the expansion valve core (23) being disposed in the expansion valve cavity (24), and the medium in the temperature-sensing package (21) being able to drive the expansion valve core (23) to move when it expands due to heat; A flameout protection switch valve, which can be connected to a flameout protection control component of a gas device and close an air inlet passage (11) or an air outlet passage (12) when the flame of a gas burner is extinguished; The expansion valve core (23) comprises a blocking member (231) which is slidably arranged in the expansion valve cavity (24) and can block the expansion valve cavity (24); a driving cylinder (232) and a piston member (233) which is slidably matched with the driving cylinder (232) are arranged on the blocking member (231); the piston member (233) is fixedly connected to the expansion valve body (22); the temperature sensing package (21) is connected to the driving cylinder (232); the medium in the temperature sensing package (21) expands due to heat and can push the driving cylinder (232) and the blocking member (231) to move; A stepped structure (241) is provided in the valve cavity (24) of the expansion valve, and the blocking member (231) can move to cooperate with the stepped structure (241) to block the valve cavity (24) of the expansion valve; A guide column (235) is provided at the lower end of the blocking member (231), and a guide hole (242) cooperating with the guide column (235) is provided in the expansion valve cavity (24); The gas combination valve further comprises a gas flow control valve assembly (4), wherein the gas flow control valve assembly (4) is capable of controlling the gas flow between the gas inlet passage (11) and the gas outlet passage (12); The gas flow control valve assembly (4) comprises a flow control valve body (41) and a valve core (42) arranged in the flow control valve body (41); The flameout protection switch valve comprises a solenoid valve (31), a long valve cavity is arranged in the flow control valve body (41), the valve core (42) is arranged at the front end of the long valve cavity, the solenoid valve (31) is arranged at the rear end of the long valve cavity, an air inlet (431) is arranged in the middle of the long valve cavity, the solenoid valve (31) can cut off the communication state between the air inlet (431) and the front end of the long valve cavity, and the thermal expansion valve assembly (2) comprises a valve core (42) arranged at the inlet An expansion valve body (22) at the air port (431) and an expansion valve core (23) arranged in the expansion valve body (22), the air inlet passage (11) being arranged on the expansion valve body (22), the expansion valve core (23) being capable of cutting off the connection between the air inlet passage (11) and the air inlet (431), the air outlet passage (12) being arranged on one side of the flow control valve body (41), the valve core (42) being capable of controlling the air outlet flow rate of the air outlet passage (12); The solenoid valve (31) is arranged at the rear end of the flow control valve body (41), the valve core (42) is arranged at the front end of the flow control valve body (41), the thermal expansion valve assembly (2) is arranged on one side of the flow control valve body (41), and the air outlet channel (12) is arranged on the other side of the flow control valve body (41).

2. The gas combination valve with anti-dry burning function according to claim 1, characterized in that: The temperature sensing package (21) is connected to the piston member (233) via a connecting pipe (211) and passes through the piston member (233) to communicate with the driving cylinder (232).

3. The gas combination valve with anti-dry burning function according to claim 1, characterized in that: A compression spring (234) is provided between the blocking member (231) and the expansion valve body (22), and the compression spring (234) can provide the blocking member (231) with an elastic force to drive the blocking member (231) to a position for blocking the expansion valve cavity (24).

Images