Water-gas linkage valve and gas appliance

Abstract

This invention relates to the field of gas appliance technology, and discloses a water-gas interlocking valve and a gas appliance. The gas valve assembly of the water-gas interlocking valve includes a valve body and a flame-adjusting and pressure-regulating structure. The valve body has an inlet chamber and an outlet chamber, which are connected by an outlet. The flame-adjusting and pressure-regulating structure is located at the outlet and includes a valve core, a diaphragm, and an adjusting rod. The valve core is located in the valve body and has a pressure-stabilizing part. The valve core can move along its axial direction to allow the pressure-stabilizing part to adjust the flow gap between the valve core and the outlet. The diaphragm is sleeved on the valve core and its outer end is connected to the valve body. The diaphragm can drive the valve core to move. The adjusting rod is movably installed on the valve body and connected to the valve core through a first elastic element. The adjusting rod is used to adjust its installation position along the axial direction of the valve core so that the outlet pressure of the gas valve assembly continuously changes between the minimum outlet pressure and the maximum outlet pressure. This water-gas interlocking valve can ensure a constant water temperature and prevent sudden changes in water temperature.

Description

Technical Field

[0001] This invention relates to the field of gas appliance technology, and in particular to a water-gas linkage valve and a gas appliance. Background Technology

[0002] Gas water heaters and wall-hung boilers, among other gas appliances, use natural gas as fuel to provide users with domestic hot water or heating hot water. They typically rely on a water-gas interlock valve to control the opening of the gas valve and the gas pressure, thus providing water for different heat loads. This water-gas interlock valve includes a pressure regulating valve, providing a pressure stabilizing function.

[0003] In existing water-gas interlock valves, the gas valve assembly uses a valve core to regulate the high and low flame settings. When the large orifice on the valve core rotates to face the gas passage, the gas flow is at its maximum, and the water heater is in high flame mode. When the small orifice on the valve core rotates to face the gas passage, the gas flow is at its minimum, and the water heater is in low flame mode. When the valve core rotates between the large and small orifices, the water heater is in a state between high and low flame. However, when the valve core is adjusted from the large orifice to between the large and small orifices, or from between the large and small orifices to the small orifice, the change in gas flow is discontinuous and abrupt. Therefore, the abrupt change in the gas pressure regulation in existing water-gas interlock valves leads to sudden temperature fluctuations, causing the water to cool or heat rapidly. Summary of the Invention

[0004] One of the technical problems solved by this invention is to provide a water-air linkage valve that can effectively solve the problems of unstable air flow in existing water-air linkage valves, which leads to inconsistent water temperature; and the phenomenon of sudden cooling and heating of water temperature caused by sudden changes in air flow when adjusting the air flow. It can achieve stable air outlet pressure and ensure constant water temperature; and when adjusting the water temperature, the air outlet pressure changes continuously to ensure that the water temperature gradually increases or decreases.

[0005] The second technical problem solved by this invention is to provide a gas appliance that can effectively solve the problems of inconsistent water temperature and sudden cooling and heating during water temperature adjustment in existing gas appliances; it can provide a constant water temperature, and the water temperature changes gradually when adjusted.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A water-air interlocking valve includes a water valve assembly, an interlocking valve assembly, and an air valve assembly. The two ends of the interlocking valve assembly are respectively connected to the water valve assembly and the air valve assembly. The air valve assembly includes:

[0008] The valve body has an air inlet chamber and an air outlet chamber inside, and the air inlet chamber and the air outlet chamber are connected by an air passage.

[0009] A flame-adjusting and pressure-regulating structure is located at the gas inlet and includes a valve core, a diaphragm, and an adjusting rod. The valve core is located within the gas valve body and has a pressure-stabilizing part. The valve core can move along its axial direction to allow the pressure-stabilizing part to adjust the flow gap between the valve core and the gas inlet. The diaphragm is sleeved on the valve core and its outer end is connected to the gas valve body. The diaphragm can drive the valve core to move. The adjusting rod is movably mounted on the gas valve body and connected to the valve core through a first elastic element. The adjusting rod is used to adjust its own installation position along the axial direction of the valve core so that the outlet pressure of the gas valve assembly continuously varies between the minimum outlet pressure and the maximum outlet pressure.

[0010] The air valve described in this invention has the following advantages compared to the prior art:

[0011] This invention provides a pressure-stabilizing section on the valve core of a valve assembly. A diaphragm within the valve body connects the valve core to the valve body, and the inlet and outlet chambers within the valve body are connected by an air passage. The valve core moves along its axis, allowing the pressure-stabilizing section to adjust the flow gap between the valve core and the air passage. When the inlet pressure in the inlet chamber is unstable, the diaphragm is subjected to force that moves the valve core. If the inlet pressure increases, the force acting on the diaphragm increases, causing the diaphragm to move the valve core away from the outlet chamber. This reduces the flow gap between the valve core and the air passage, keeping the gas flow rate in the outlet chamber constant and thus maintaining a constant outlet pressure. Similarly, when the inlet pressure decreases, the pressure acting on the diaphragm decreases, causing the diaphragm to move the valve core closer to the outlet chamber. This increases the flow gap between the valve core and the air passage, keeping the gas flow rate in the outlet chamber constant and thus maintaining a constant outlet pressure, achieving pressure stabilization. By incorporating a flame-adjusting and pressure-regulating structure at the air inlet, the adjusting rod of this structure is movably mounted on the valve body and connected to the valve core via a first elastic element. The adjusting rod adjusts its position along the valve core's axis to continuously vary the outlet pressure of the valve assembly between the minimum and maximum outlet pressures. This results in a gradual increase or decrease in the gas flow rate provided by the valve assembly. The valve assembly is connected to the water valve assembly via a linkage valve assembly, thereby ensuring gradual water temperature changes and preventing sudden cooling or heating. The water-gas linkage valve provided by this invention can both maintain a constant water temperature and ensure gradual temperature changes during adjustment.

[0012] In one embodiment, one end of the valve core is provided with a first mounting channel, the adjusting rod extends into the first mounting channel, and the first elastic element is connected between the valve core and the adjusting rod.

[0013] In one embodiment, the flame and pressure regulating structure further includes a first adjusting member, which has a minimum outlet pressure limiting surface along the axial direction of the adjusting rod. The first adjusting member is movably connected to the valve body. The first adjusting member includes a first limiting surface. The adjusting rod adjusts its position along the axial direction of the valve core to adjust the minimum outlet pressure. After the minimum outlet pressure is adjusted, the first adjusting member is moved so that the first limiting surface abuts against the minimum outlet pressure limiting surface.

[0014] In one embodiment, the valve body includes a first end cap with a first external thread, the first adjusting member includes a first cavity with a first internal thread, the first internal thread being screwed into the first external thread, the bottom of the first cavity being the first limiting surface, and when the position of the adjusting rod along the axial direction of the valve core is adjusted to the minimum outlet pressure of the valve assembly, the first adjusting member is screwed to make the first limiting surface abut against the minimum outlet pressure limiting surface.

[0015] In one embodiment, a maximum outlet pressure limiting surface is also provided along the axial direction of the adjusting rod. The maximum outlet pressure limiting surface is located on the side of the minimum outlet pressure limiting surface near the valve core. A second limiting surface is provided inside the first end cover. The adjusting rod is moved so that the maximum outlet pressure limiting surface abuts against the second limiting surface, and the outlet pressure of the air valve assembly reaches the maximum outlet pressure.

[0016] The flame and pressure regulating structure further includes a second adjusting member and a second elastic member. The second adjusting member is located at the end of the valve body away from the adjusting rod. The second adjusting member is movably connected to the valve body. The second adjusting member is connected to the valve core through the second elastic member. By adjusting the position of the second adjusting member, the second elastic member abuts against the valve core. After the second elastic member abuts against the valve core, the position of the second adjusting member is further adjusted to compress the second elastic member. The second elastic member drives the valve core to move, thereby adjusting the position of the pressure stabilizing part so that the maximum outlet pressure is adjustable.

[0017] In one embodiment, a second mounting channel is provided at one end of the valve core near the second adjusting member, the second adjusting member partially extends into the second mounting channel, and the second elastic member is connected between the second adjusting member and the valve core.

[0018] In one embodiment, the valve body further includes a second end cap, the second end cap including a second cavity, the second cavity having a second internal thread, the second adjusting member being disposed in the second cavity and having a second external thread engaging with the second internal thread, the second adjusting member passing through the second cavity and connected to the second elastic member, adjusting the screw length between the second adjusting member and the second end cap so that the second adjusting member can drive the second elastic member to abut against the valve core, and drive the valve core to move to adjust the position of the pressure stabilizing part.

[0019] In one embodiment, the adjusting rod is provided with a first limiting part and a second limiting part at intervals. The second limiting part is disposed between the first limiting part and the valve core. The end face of the first limiting part away from the second limiting part is the minimum outlet pressure limiting surface, and the end face of the second limiting part away from the first limiting part is the maximum outlet pressure limiting surface.

[0020] In one embodiment, the adjusting rod is provided with a third external thread, which is located on the side of the second limiting portion away from the first limiting portion. The first end cover is provided with a third internal thread, and the third external thread cooperates with the third internal thread. By screwing the adjusting rod, the position of the adjusting rod along the axial direction of the valve core can be adjusted.

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

[0022] Gas appliances, including the water-gas linkage valve described in any of the above schemes.

[0023] The gas appliance of the present invention has the following advantages compared with the prior art:

[0024] The gas appliance using the aforementioned water-gas linkage valve can provide a constant water temperature. When adjusting the water temperature, it can gradually decrease or gradually increase, providing a good user experience. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the water-air linkage valve provided in a specific embodiment of the present invention;

[0027] Figure 2This is a top view of the water-air linkage valve provided in a specific embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional view of the water-air linkage valve provided in a specific embodiment of the present invention;

[0029] Figure 4 This is a planar sectional view of the water-air linkage valve provided in a specific embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the state of the air valve when it is at the minimum outlet pressure, provided in a specific embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of the state of the air valve when it is at its maximum outlet pressure, provided in a specific embodiment of the present invention.

[0032] Figure 7 This is a schematic diagram of the structure of the adjusting rod provided in a specific embodiment of the present invention.

[0033] Label Explanation:

[0034] 100. Air valve assembly; 200. Water valve assembly; 300. Linkage valve assembly; 400. Shut-off valve;

[0035] 1. Valve body; 11. Body; 111. Inlet chamber; 112. Outlet chamber; 12. First end cap; 121. Second limiting surface; 13. Second end cap; 131. Second cavity; 14. Air port;

[0036] 2. Valve core; 21. Pressure regulating section; 22. First mounting channel; 23. Second mounting channel;

[0037] 3. Diaphragm;

[0038] 4. Adjusting rod; 41. First limiting part; 411. Minimum outlet pressure limiting surface; 42. Second limiting part; 421. Maximum outlet pressure limiting surface; 43. Third external thread;

[0039] 5. First adjusting component; 51. First cavity; 511. First limiting surface;

[0040] 6. Second adjusting component;

[0041] 71. First elastic element; 72. Second elastic element;

[0042] 81. First sealing ring; 82. Second sealing ring; 83. Third sealing ring. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "center", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] like Figures 1-4 As shown, this embodiment also provides a water-air linkage valve, including a water valve assembly 200, a linkage valve assembly 300, and an air valve assembly 100, wherein the water valve assembly 200 and the air valve assembly 100 are connected through the linkage valve assembly 300.

[0048] like Figure 5As shown, the valve assembly 100 includes a valve body 1 and a flame-adjusting and pressure-regulating structure. The valve body 1 has an inlet chamber 111 and an outlet chamber 112, which are connected by an air passage 14. The flame-adjusting and pressure-regulating structure is located at the air passage 14 and includes a valve core 2, a diaphragm 3, and an adjusting rod 4. The valve core 2 is located inside the valve body 1 and has a pressure-stabilizing part 21. The valve core 2 can move along the axial direction so that the pressure-stabilizing part 21 adjusts the flow gap between the valve core 2 and the air passage 14. Gas supplied from the outside enters the inlet chamber 111 and then flows through the flow gap between the valve core 2 and the air passage 14 into the outlet chamber 112, and then flows out through the outlet chamber 112 into the combustion chamber. The diaphragm 3 is sleeved on the valve core 2 and its outer end is connected to the valve body 1. The diaphragm 3 can drive the valve core 2 to move to adjust the flow gap between the valve core 2 and the air passage 14. When the pressure in the intake chamber 111 is unstable, the outlet pressure is kept constant by adjusting the flow gap between the valve core 2 and the air outlet 14. The valve core 2 is connected to the valve body 1 via the diaphragm 3. When the intake pressure in the intake chamber 111 is unstable, the force on the diaphragm 3 causes the valve core 2 to move. If the intake pressure increases, the force acting on the diaphragm 3 increases, causing the diaphragm 3 to move the valve core 2 away from the outlet chamber 112. This reduces the flow gap between the valve core 2 and the air outlet 14, keeping the gas flow rate in the outlet chamber 112 constant, thus maintaining a constant outlet pressure. Similarly, when the pressure in the intake chamber 111 decreases, the pressure acting on the diaphragm 3 decreases, causing the diaphragm 3 to move the valve core 2 closer to the outlet chamber 112. This increases the flow gap between the valve core 2 and the air outlet 14, keeping the gas flow rate in the outlet chamber 112 constant, thus maintaining a constant outlet pressure and achieving pressure stabilization.

[0049] The adjusting rod 4 is movably mounted on the valve body 1 and connected to the valve core 2 via the first elastic element 71. The adjusting rod 4 is used to adjust its own installation position along the axial direction of the valve core 2 so that the outlet pressure of the valve assembly 100 continuously varies between the minimum outlet pressure and the maximum outlet pressure. Because the displacement of the adjusting rod 4 along the axial direction of the valve core 2 is continuously adjustable, the flow gap between the valve core 2 and the air port 14 gradually changes, thus making the outlet pressure continuously change during adjustment.

[0050] like Figure 3The arrows indicate the direction of gas flow. The water-gas linkage valve assembly 300 also includes a shut-off valve 400. After passing through the shut-off valve 400, the gas enters the intake chamber 111, then flows through the gap between the valve core 2 and the air outlet 14 into the outlet chamber 112. After exiting the outlet chamber 112, the gas passes through the linkage valve assembly 300 and enters the combustion chamber to provide heat to the water in the water valve assembly 200. Different outlet pressures of the gas valve assembly 100 result in different amounts of heat provided to the water. The higher the outlet pressure, the greater the gas flow rate, the greater the heat provided to the water, and the higher the water temperature. Conversely, the lower the outlet pressure, the smaller the gas flow rate, the less heat provided to the water, and the lower the water temperature. When the outlet pressure of the gas valve assembly 100 is at its minimum, the water temperature flowing out of the water-gas linkage valve is the lowest. When the outlet pressure of the gas valve assembly 100 is at its maximum, the water temperature flowing out of the water-gas linkage valve is the highest.

[0051] The water-gas linkage valve provided in this embodiment can both stabilize the pressure, ensuring a constant gas flow rate from the gas valve assembly 100, and ensure continuous changes in the outlet pressure when adjusting it, allowing the gas flow rate to change gradually, thereby ensuring a gradual change in water temperature and preventing sudden cooling or heating. This water-gas linkage valve can both maintain a constant water temperature and ensure gradual changes in water temperature when adjusting it.

[0052] In one embodiment, the valve body 1 includes a body 11, a first end cap 12, and a second end cap 13. The first end cap 12 and the second end cap 13 are respectively fixed to both ends of the body 11 by fastening bolts. A diaphragm 3 is fitted around the outer periphery of the valve core 2, with its outer end fixed between the first end cap 12 and the body 11. An air passage 14 is provided inside the body 11. The valve core 2 passes through the air passage 14 and is slidably connected to the second end cap 13. A pressure stabilizing part 21 is clearance-fitted with the air passage 14. The longitudinal section of the pressure stabilizing part 21 is frustoconical, with the larger end of the frustoconical pressure stabilizing part 21 located near the second end cap 13 and the smaller end located near the first end cap 12. The peripheral wall of the frustoconical pressure stabilizing part 21 is an arc-shaped surface, and the gap between this arc-shaped surface and the air passage 14 is the flow gap between the valve core 2 and the air passage 14. An air inlet chamber 111 is formed between the smaller end of the pressure stabilizing part 21 and the diaphragm 3, and an air outlet chamber 112 is formed between the larger end of the pressure stabilizing part 21 and the second end cap 13. The adjusting rod 4 is connected to the end of the valve core 2 near the first end cap 12 via a first elastic member 71.

[0053] In one embodiment, a first mounting channel 22 is provided at one end of the valve core 2, and a portion of the adjusting rod 4 extends into the first mounting channel 22. A first elastic element 71 is connected between the valve core 2 and the adjusting rod 4. The first elastic element 71 plays a role in stabilizing the pressure during pressure stabilization.

[0054] In this embodiment, the first elastic element 71 is a spring. The diameter of the end of the adjusting rod 4 near the valve core 2 is smaller. The spring is sleeved on the smaller diameter of the adjusting rod 4 and abuts against the adjusting rod 4. The other end of the spring abuts against the bottom of the cavity of the first mounting channel 22.

[0055] In the prior art, the gas valve assembly 100 has a gap between the valve core 2 and the gas valve body 1. The size of this gap is difficult to control during mass production, which makes it difficult to accurately control the gas flow rate when the gas appliance is in low flame state, and the minimum heat load fluctuates greatly.

[0056] The formula for calculating heat load is: Φ = Q v H, where Q v Let H be the gas flow rate and H be the calorific value. The gas flow rate is calculated using the following formula: Where α is the flow coefficient, ε is the expansion coefficient, d is the equivalent nozzle diameter, and ρ t The relative density is given. As can be seen from the above calculation formula, the heat load is related to the outlet pressure and outlet flow rate. To ensure stable heat load on the valve during mass production, the outlet pressure must be carefully controlled.

[0057] When a gas appliance leaves the factory, its minimum and maximum heat loads are pre-set. The gas flow rate provided by the gas valve assembly 100 determines the heat load of the gas appliance. The minimum outlet pressure of the gas valve assembly 100 corresponding to the minimum heat load is a first set value; the maximum outlet pressure of the gas valve assembly 100 corresponding to the maximum heat load is a second set value. Both the first and second set values ​​here are within a set range.

[0058] In one embodiment, the minimum outlet pressure is adjustable. By setting the minimum outlet pressure to adjustable, the minimum outlet pressure of the mass-produced gas valve assembly 100 can be adjusted to a first set value, thereby keeping the minimum heat load of the gas appliance stable.

[0059] In one embodiment, the flame and pressure regulating structure includes a first adjusting member 5, with a minimum outlet pressure limiting surface 411 arranged along the axial direction of the adjusting rod 4. The first adjusting member 5 is movably connected to the valve body 1. The first adjusting member 5 includes a first limiting surface 511. The adjusting rod 4 adjusts its position along the axial direction of the valve core 2 to adjust the minimum outlet pressure. After the minimum outlet pressure is adjusted, the first adjusting member 5 is moved so that the first limiting surface 511 abuts against the minimum outlet pressure limiting surface 411. The valve body 1 has a first adjusting member 5 movably connected to the valve body 1 at one end near the adjusting rod 4. When adjusting the minimum outlet pressure, the minimum outlet pressure is measured with an instrument while the adjusting rod 4 is moved so that the current outlet pressure reaches a first set value. Then, the first adjusting member 5 is moved so that the first limiting surface 511 abuts against the minimum outlet pressure limiting surface 411, thereby fixing the position of the adjusting rod 4 so that the minimum outlet pressure is the first set value.

[0060] When assembling the valve assembly 100, the adjusting rod 4 has an initial position. After assembling the valve assembly 100, the minimum outlet pressure is tested. Typically, the minimum outlet pressure at this point deviates from the first set value, requiring adjustment. During adjustment, the minimum outlet pressure is measured with an instrument while the adjusting rod 4 is moved. When the outlet pressure is adjusted to the first set value, the movement of the adjusting rod 4 is stopped, and the position of the adjusting rod 4 is fixed using the first adjusting component 5. Figure 5 As shown, when the adjusting rod 4 moves downward, the first elastic element 71 is compressed, acting on the valve core 2. The valve core 2 moves downward, increasing the flow gap between the valve core 2 and the air port 14, thus increasing the minimum outlet pressure. When the adjusting rod 4 moves upward, the valve core 2 moves upward under the elastic restoring force of the first elastic element 71, decreasing the flow gap between the valve core 2 and the air port 14, thus decreasing the minimum outlet pressure. By moving the adjusting rod 4, the minimum outlet pressure is adjusted to the first set value. It should be noted that after the minimum outlet pressure is adjusted, the position of the adjusting rod 4 is fixed by the first adjusting element 5 to ensure that the minimum outlet pressure of the valve assembly 100 remains unchanged.

[0061] In one embodiment, the first end cap 12 is provided with a first external thread, and the first adjusting member 5 includes a first cavity 51. The first cavity 51 is provided with a first internal thread, and the first internal thread and the first external thread are screwed together. The bottom of the first cavity 51 is a first limiting surface 511. When the position of the adjusting rod 4 along the axial direction of the valve core 2 is adjusted to the minimum air pressure of the air valve assembly 100, the first adjusting member 5 is screwed on so that the first limiting surface 511 abuts against the minimum air pressure limiting surface 411.

[0062] The adjusting rod 4 moves downward to compress the first elastic element 71. The first elastic element 71 drives the valve core 2 to move downward, increasing the flow gap between the valve core 2 and the gas port 14, thereby increasing the minimum gas outlet pressure. The first adjusting member 5 is then screwed downward to make the first limiting surface 511 abut against the minimum gas outlet pressure limiting surface 411. The adjusting rod 4 moves upward to decrease the flow gap between the valve core 2 and the gas port 14, thereby decreasing the minimum gas outlet pressure. The first adjusting member 5 is then screwed upward to make the first limiting surface 511 abut against the minimum gas outlet pressure limiting surface 411. By adjusting the position of the adjusting rod 4 along the axis of the valve core 5, the minimum gas outlet pressure reaches the first set value. Then, by fixing it with the first adjusting member 5, the minimum gas outlet pressure of the mass-produced gas valve assembly 100 can be kept constant, and the minimum heat load of the corresponding gas appliance can be kept constant.

[0063] Of course, in other embodiments, the first adjusting member 5 can also be slidably connected to the first end cover 12 so that the position of the first adjusting member 5 on the first end cover 12 is adjustable. After the position of the adjusting rod 4 is adjusted, the second adjusting member 5 is fixed on the first end cover 12.

[0064] like Figures 5-7 As shown, a maximum outlet pressure limiting surface 421 is also provided along the axial direction of the adjusting rod 4. The maximum outlet pressure limiting surface 421 is located on the side of the minimum outlet pressure limiting surface 411 near the valve core 2. A first limiting part 41 and a second limiting part 42 are provided on the adjusting rod 4 at intervals. The second limiting part 42 is located between the first limiting part 41 and the valve core 2. The end face of the first limiting part 41 away from the second limiting part 42 is the minimum outlet pressure limiting surface 411, and the end face of the second limiting part 42 away from the first limiting part 41 is the maximum outlet pressure limiting surface 421. In order to ensure the airtightness of the air intake chamber 111, a first sealing groove is formed between the first limiting part 41 and the second limiting part 42. A first sealing ring 81 is provided in the first sealing groove. The first sealing ring 81 cooperates with the inner wall of the through hole to ensure the airtightness of the air intake chamber 111.

[0065] The adjusting rod 4 is also provided with a third external thread 43. The third external thread 43 is located on the side of the second limiting part 42 away from the first limiting part 41. The first end cover 12 is provided with a third internal thread. The third external thread 43 and the third internal thread cooperate. By turning the adjusting rod 4, the position of the adjusting rod 4 along the axis of the valve core 2 can be adjusted.

[0066] In this embodiment, the first end cap 12 is provided with a through hole, which is a stepped hole. The stepped surface of the stepped hole is the second limiting surface 121. When the maximum outlet pressure limiting surface 421 abuts against the stepped surface of the stepped hole, the outlet pressure of the valve assembly 100 is the maximum outlet pressure. A third internal thread is provided on the wall of the through hole, and the adjusting rod 4 passes through the through hole and connects to the valve core 2 inside the body 11. The third internal thread is provided on the inner wall of the smaller diameter hole of the stepped hole.

[0067] Similarly, during mass production of valve assemblies 100, it is difficult to guarantee that the maximum outlet pressure of each valve assembly 100 is the second set value. In one embodiment, the maximum outlet pressure is adjustable. After the valve assembly 100 is assembled, the maximum outlet pressure of the valve assembly 100 is adjusted to the second set value, so that the maximum outlet pressure of the valve assemblies 100 produced in batches remains consistent.

[0068] In one embodiment, a second limiting surface 121 is provided inside the first end cap 12. The adjusting rod 4 is moved so that the maximum outlet pressure limiting surface 421 abuts against the second limiting surface 121, and the outlet pressure of the valve assembly 100 reaches the maximum outlet pressure. The flame adjustment and pressure regulation structure also includes a second adjusting member 6 and a second elastic member 72. The second adjusting member 6 is located at the end of the valve body 1 away from the adjusting rod 4. The second adjusting member 6 is movably connected to the valve body 1. The second adjusting member 6 is connected to the valve core 2 through the second elastic member 72. By adjusting the position of the second adjusting member 6 so that the second elastic member 72 abuts against the valve core 2, and after the second elastic member 72 abuts against the valve core 2, the position of the second adjusting member 6 is further adjusted to compress the second elastic member 72. The second elastic member 72 drives the valve core 2 to move, thereby adjusting the position of the pressure stabilizing part 21 so that the maximum outlet pressure is adjustable.

[0069] Specifically, a second mounting channel 23 is provided at one end of the valve core 2 near the second adjusting member 6. The second adjusting member 6 partially extends into the second mounting channel 23, and the second elastic member 72 is connected between the second adjusting member 6 and the valve core 2. The second end cover 13 includes a second cavity 131, which has a second internal thread. The second adjusting member 6 is located in the second cavity 131 and has a second external thread that mates with the second internal thread. The second adjusting member 6 passes through the second cavity 131 and connects to the second elastic member 72. The screw length between the second adjusting member 6 and the second end cover 13 is adjusted so that the second adjusting member 6 can drive the second elastic member 72 to abut against the valve core 2 and drive the valve core 2 to move to adjust the position of the pressure regulating part 21.

[0070] In this embodiment, the second cavity 131 is configured as a stepped cavity that passes through the second end cover 13. The inner diameter of the middle part of the stepped cavity is smaller, so that the inner diameters of the cavities at both ends are larger. The second internal thread is provided at the middle part with the smaller inner diameter. The second adjusting member 6 is configured as three parts with a stepped decrease in outer diameter from the end away from the valve core 2 to the end closer to the valve core 2. A second sealing ring 82 is provided between the part with the largest outer diameter and the stepped cavity, and a third sealing ring 83 is provided between the second end cover 13 and the body 11. The provision of the second sealing ring 82 and the third sealing ring 83 can ensure the airtightness of the air outlet cavity 112. The part with the smallest outer diameter of the second adjusting member 6 is fitted with a second elastic member 72. One end of the second elastic member 72 abuts against the second adjusting member 6, and the other end can abut against the bottom of the cavity of the second mounting channel 23. The second external thread is provided in the part between the largest and smallest outer diameters.

[0071] When the valve assembly 100 is adjusted to the minimum outlet pressure, the second elastic element 72 has not yet contacted the bottom of the second mounting channel 23 and exerts no force on the valve core 2. After adjusting the minimum outlet pressure to the first set value, the position of the first adjusting element 5 is fixed to ensure that the minimum outlet pressure remains unchanged. When the valve assembly 100 needs to be adjusted to the maximum outlet pressure, the adjusting rod 4 is rotated to make the maximum outlet pressure limiting surface 421 of the adjusting rod 4 contact the second limiting surface 121. The dimensions of the adjusting rod 4, the first end cap 12, and the valve core 2 need to be determined through repeated experiments during the design process. Then, the dimensions and elastic force of the first elastic element 71 and the second elastic element 72 are determined and repeatedly corrected through experiments so that the outlet pressure when the maximum outlet pressure limiting surface 421 of the adjusting rod 4 contacts the second limiting surface 121 is 30 Pa to 100 Pa greater than the second set value. When the maximum outlet pressure is corrected to the second set value, the second adjusting member 6 is turned upwards, which drives the second elastic member 72 to move closer to the valve core 2. After the second elastic member 72 abuts against the bottom of the cavity of the second mounting channel 23, the second adjusting member 6 is turned upwards to compress the second elastic member 72. Under the action of the compression force of the second elastic member 72, the valve core 2 moves upwards, the flow gap between the valve core 2 and the air port 14 gradually decreases, and the outlet pressure also begins to decrease. The second adjusting member 6 is turned upwards until the outlet pressure reaches the second set value.

[0072] Of course, in other embodiments, the second adjusting member 6 can also be configured to slide connected to the second end cover 13, so that the second adjusting member 6 can move upward, and when the maximum air pressure reaches the second set value, the second adjusting member 6 and the second end cover 13 are fixed.

[0073] When adjusting the minimum and maximum outlet pressures, the outlet pressure is tested on an outlet pressure test bench equipped with an instrument for detecting outlet pressure.

[0074] The water-gas linkage valve provided in this embodiment provides a minimum outlet pressure for the valve assembly 100 when the minimum outlet pressure limiting surface 411 of the adjusting rod 4 abuts against the first limiting surface 511. When the adjusting rod 4 is moved to the point where the maximum outlet pressure limiting surface 421 abuts against the second limiting surface 121, the outlet pressure of the valve assembly 100 reaches its maximum. Moving the adjusting rod 4 between the first limiting surface 511 and the second limiting surface 121 continuously changes its position, thereby driving the valve core 2 to gradually change the flow gap between the valve core 2 and the air port 14. This ensures that the outlet pressure of the valve assembly 100 also changes continuously, resulting in a continuous change in the gas flow rate provided by the valve assembly 100 without abrupt changes. Furthermore, the minimum and maximum outlet pressures are precisely adjusted during assembly, ensuring that the minimum and maximum outlet pressures of the valve assemblies 100 produced in batches remain consistent.

[0075] When the inlet pressure of the air inlet chamber 111 of the air valve assembly 100 is unstable, the diaphragm 3 drives the valve core 2 to adjust the flow gap between the valve core 2 and the air outlet 14, thereby ensuring a constant gas flow rate in the outlet chamber 112 and maintaining a constant outlet pressure, thus achieving pressure stabilization and ensuring a constant water temperature in the water valve assembly 200. When it is necessary to adjust the water temperature, the adjusting rod 4 is moved to adjust its position along the axis of the valve core 2, causing a change in the flow gap between the valve core 2 and the air outlet 14. This causes the outlet pressure of the air valve assembly 100 to gradually change as the flow gap between the valve core 2 and the air outlet 14 gradually increases or decreases, thereby ensuring a gradual change in water temperature and avoiding sudden cooling or heating. The water-air linkage valve provided in this embodiment can both ensure a constant water temperature and ensure a gradual change in water temperature when adjusting it.

[0076] This embodiment also provides a gas appliance, including the aforementioned water-gas interlock valve. The gas appliance can be a gas water heater or a wall-mounted boiler. The gas appliance using the aforementioned water-gas interlock valve in this embodiment can provide a constant water temperature. When adjusting the water temperature, the temperature can gradually decrease or gradually increase, providing a good user experience.

[0077] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0078] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A water-air interlocking valve, comprising a water valve assembly (200), an interlocking valve assembly (300), and an air valve assembly (100), wherein both ends of the interlocking valve assembly (300) are respectively connected to the water valve assembly (200) and the air valve assembly (100), characterized in that, The valve assembly (100) includes: The valve body (1) has an air inlet chamber (111) and an air outlet chamber (112) inside, and the air inlet chamber (111) and the air outlet chamber (112) are connected by an air inlet (14); The flame-adjusting and pressure-regulating structure is located at the gas inlet (14) and includes a valve core (2), a diaphragm (3), and an adjusting rod (4). The valve core (2) is located inside the gas valve body (1) and has a pressure stabilizing part (21). The valve core (2) can move along the axial direction so that the pressure stabilizing part (21) adjusts the flow gap between the valve core (2) and the gas inlet (14). The diaphragm (3) is sleeved on the valve core (2) and its outer end is connected to the gas valve body (1). The diaphragm (3) can drive the valve core (2) to move. The adjusting rod (4) is movably installed on the gas valve body (1) and connected to the valve core (2) through a first elastic element (71). The adjusting rod (4) is used to adjust its own installation position along the axial direction of the valve core (2) so that the gas outlet pressure of the gas valve assembly (100) continuously changes between the minimum gas outlet pressure and the maximum gas outlet pressure. The flame adjustment and pressure regulation structure also includes a second adjusting member (6) and a second elastic member (72). The second adjusting member (6) is located at the end of the valve body (1) away from the adjusting rod (4). The second adjusting member (6) is movably connected to the valve body (1). The second adjusting member (6) is connected to the valve core (2) through the second elastic member (72). By adjusting the position of the second adjusting member (6) so that the second elastic member (72) abuts against the valve core (2), after the second elastic member (72) abuts against the valve core (2), the position of the second adjusting member (6) is further adjusted to compress the second elastic member (72). The second elastic member (72) drives the valve core (2) to move to adjust the position of the pressure stabilizing part (21) so that the maximum outlet pressure is adjustable. The flame adjustment and pressure adjustment structure also includes a first adjustment component (5), which has a minimum outlet pressure limiting surface (411) along the axial direction of the adjustment rod (4). The first adjustment component (5) is movably connected to the valve body (1). The first adjustment component (5) includes a first limiting surface (511). The adjustment rod (4) adjusts its own position along the axial direction of the valve core (2) to adjust the minimum outlet pressure. After the minimum outlet pressure is adjusted, the first adjustment component (5) is moved so that the first limiting surface (511) abuts against the minimum outlet pressure limiting surface (411).

2. The water-gas linkage valve according to claim 1, characterized in that, One end of the valve core (2) is provided with a first mounting channel (22), the adjusting rod (4) extends into the first mounting channel (22), and the first elastic element (71) is connected between the valve core (2) and the adjusting rod (4).

3. The water-gas linkage valve according to claim 1, characterized in that, The valve body (1) includes a first end cap (12) with a first external thread. The first adjusting member (5) includes a first cavity (51) with a first internal thread. The first internal thread is screwed into the first external thread. The bottom of the first cavity (51) is the first limiting surface (511). When the position of the adjusting rod (4) along the axial direction of the valve core (2) is adjusted to the minimum air pressure of the valve assembly (100), the first adjusting member (5) is screwed to make the first limiting surface (511) abut against the minimum air pressure limiting surface (411).

4. The water-gas linkage valve according to claim 3, characterized in that, A maximum outlet pressure limiting surface (421) is also provided along the axial direction of the adjusting rod (4). The maximum outlet pressure limiting surface (421) is located on the side of the minimum outlet pressure limiting surface (411) close to the valve core (2). A second limiting surface (121) is provided inside the first end cover (12). The adjusting rod (4) is moved so that the maximum outlet pressure limiting surface (421) abuts against the second limiting surface (121), and the outlet pressure of the air valve assembly (100) reaches the maximum outlet pressure.

5. The water-gas linkage valve according to claim 4, characterized in that, The valve core (2) is provided with a second mounting channel (23) at one end near the second adjusting member (6), the second adjusting member (6) extends into the second mounting channel (23), and the second elastic member (72) is connected between the second adjusting member (6) and the valve core (2).

6. The water-gas linkage valve according to claim 5, characterized in that, The valve body (1) further includes a second end cap (13), the second end cap (13) includes a second cavity (131), the second cavity (131) is provided with a second internal thread, the second adjusting member (6) is provided in the second cavity (131) and is provided with a second external thread that mates with the second internal thread, the second adjusting member (6) passes through the second cavity (131) and is connected to the second elastic member (72), the screw length between the second adjusting member (6) and the second end cap (13) is adjusted so that the second adjusting member (6) can drive the second elastic member (72) to abut against the valve core (2) and drive the valve core (2) to move to adjust the position of the pressure stabilizing part (21).

7. The water-gas linkage valve according to claim 4, characterized in that, The adjusting rod (4) is provided with a first limiting part (41) and a second limiting part (42) spaced apart. The second limiting part (42) is disposed between the first limiting part (41) and the valve core (2). The end face of the first limiting part (41) away from the second limiting part (42) is the minimum outlet pressure limiting surface (411), and the end face of the second limiting part (42) away from the first limiting part (41) is the maximum outlet pressure limiting surface (421).

8. The water-gas linkage valve according to claim 7, characterized in that, The adjusting rod (4) is provided with a third external thread (43), which is located on the side of the second limiting part (42) away from the first limiting part (41). The first end cover (12) is provided with a third internal thread. The third external thread (43) cooperates with the third internal thread. By screwing the adjusting rod (4), the position of the adjusting rod (4) along the axis of the valve core (2) can be adjusted.

9. A gas appliance, characterized in that, Includes the water-air linkage valve as described in any one of claims 1-8.

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