Mixing device and gas water heating device

Abstract

The utility model provides a mixing device and a gas water heating device, relates to the technical field of gas mixing, and comprises a shell, a moving mechanism and a flexible spacer, the shell comprises a first channel, a second channel and a mixing channel, the first channel comprises a first cut-off part, and the second channel comprises a second cut-off part; the moving mechanism is provided with a first moving direction for increasing the flow passing area of the first intercepting part and the flow passing area of the second intercepting part, and a second moving direction for reducing the flow passing area of the first intercepting part and the flow passing area of the second intercepting part; the moving mechanism is sleeved with the flexible spacer, the first channel and the second channel are spaced in a sealed mode, the flexible spacer can deform along with the movement of the moving mechanism, and at least part of the flexible spacer is arranged in a protruding mode in the first movement direction. According to the mixing device, the overall deformation quantity of the flexible spacer can be reduced, the fatigue life of the flexible spacer can be prolonged, and the service life of the mixing device is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas mixing, in particular to a mixing device and a gas water heater. Background Art

[0002] Fully premixed combustion of gas refers to a combustion method in which the gas is mixed with sufficient air before combustion, and no air is required during the combustion process. The flame propagation speed of fully premixed combustion is fast, and the volumetric heat intensity of the combustion chamber is very high, generally reaching 28 to 56×10 3 Kw / m 3 Or higher, and can achieve complete combustion at a very small excess air coefficient, and there is almost no chemical incomplete combustion phenomenon. In the full premixed gas burner, a venturi tube adjustment device is generally used to ensure that the gas and air are fully mixed, so that the air flow velocity field is uniform, and the air flow velocity at each point of the burner is greater than the flame propagation velocity at the lowest load. At the same time, it also ensures the uniformity of the flame on the burner surface, avoiding the flame on the burner surface from being too long and contacting the heat exchanger surface to cause incomplete combustion.

[0003] When the Venturi mixing device is in use, the moving mechanism needs to be inserted into the air channel and the gas channel, and the gap between the air channel and the gas channel needs to be sealed by a flexible seal. In the prior art, the flexible seal is generally a membrane that is positively arranged between the air channel and the gas channel, that is, the deformation portion of the membrane is arranged downward, and the opening of the membrane is arranged upward, the inner side of the membrane is sleeved on the moving mechanism, and the outer side of the membrane is connected to the shell to play a separating and sealing role to prevent the cross-flow of air and gas. Since the membrane needs to follow the moving mechanism in real time, the moving mechanism will continuously pull the membrane during the adjustment process, which makes the membrane prone to fatigue cracking, thereby reducing the service life of the mixing device. Therefore, how to improve the service life of the mixing device has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present utility model is to provide a mixing device and a gas water heater for increasing the service life.

[0005] The above-mentioned purpose of the utility model can be achieved by adopting the following technical scheme. The utility model provides a mixing device, including

[0006] A housing, the housing comprising a first channel for conveying a first medium, a second channel for conveying a second medium, and a mixing channel connecting the first channel and the downstream of the second channel, the first channel comprising a first intercepting portion whose flow area can be changed, and the second channel comprising a second intercepting portion whose flow area can be changed;

[0007] A moving mechanism is movably arranged in the housing, and the moving mechanism can change the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion by action; the moving mechanism has: a first movement direction for increasing the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion, and a second movement direction for reducing the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion;

[0008] A flexible spacer is sleeved on the moving mechanism and seals and separates the first channel and the second channel. The flexible spacer can be deformed with the movement of the moving mechanism, and at least part of the flexible spacer is convexly arranged along the first movement direction.

[0009] In a preferred embodiment of the present invention, the housing is provided with a connecting hole between the first channel and the second channel through which the moving mechanism passes, and the flexible spacer is sleeved on the moving mechanism and seals the connecting hole.

[0010] In a preferred embodiment of the present invention, the flexible spacer includes: a fixed portion connected to the shell, a follower portion connected to the moving mechanism, and a deformable portion arranged between the fixed portion and the follower portion, and the deformable portion is protruded along the first movement direction.

[0011] In a preferred embodiment of the present invention, the deformation portion is arranged around the periphery of the moving mechanism.

[0012] In a preferred embodiment of the present invention, when the first intercepting portion and / or the second intercepting portion is in a blocking position, the cross section of the deformation portion is arranged to be arc-shaped.

[0013] In a preferred embodiment of the present invention, a plurality of the deformation parts are provided, and along the direction from the fixed part to the follower part, a plurality of the deformation part spacer rings are provided on the flexible spacer.

[0014] In a preferred embodiment of the present invention, the flexible spacer includes a membrane, the outer edge of the membrane is provided with the fixed portion, the inner edge of the membrane is provided with the follower portion, and at least a portion of the diaphragm of the membrane is raised along the first movement direction to form the deformation portion.

[0015] In a preferred embodiment of the present invention, the ratio of the maximum height of the deformation portion protruding from the main body of the membrane to the moving stroke of the moving mechanism is greater than 1:7.

[0016] In a preferred embodiment of the present invention, the moving mechanism includes a first medium cut-off member, a second medium cut-off member, and a linkage member, wherein the linkage member connects the first medium cut-off member and the second medium cut-off member so that the first medium cut-off member and the second medium cut-off member are linked, the first medium cut-off member can be adjustably disposed in the first cut-off portion, and the second medium cut-off member can be adjustably disposed in the second cut-off portion.

[0017] In a preferred embodiment of the present invention, the first channel further comprises a first medium valve port, the first medium valve port is connected to the first intercepting portion, and the first medium intercepting member comprises a first medium blocking position for blocking the first medium valve port;

[0018] When the first medium shut-off member is in the first medium blocking position, the mixing device is further provided with a first connecting portion connecting the first channel located downstream of the first medium valve port with the first channel located upstream of the first medium valve port.

[0019] In a preferred embodiment of the present invention, the second channel further comprises a second medium valve port, the second medium valve port is connected to the second intercepting portion, and the second medium intercepting member comprises a second medium blocking position for blocking the second medium valve port;

[0020] When the second medium shut-off member is located at the second medium blocking position, the mixing device is further provided with a second connecting portion connecting the second channel located downstream of the second medium valve port with the second channel located upstream of the second medium valve port.

[0021] In a preferred embodiment of the present invention, a Venturi tube structure is provided between the first channel, the second channel and the mixing channel; or, the first channel, the second channel and the mixing channel cooperate to form a Venturi tube structure.

[0022] In a preferred embodiment of the present invention, the first medium channel is a gas channel, and the second medium channel is an air channel.

[0023] The utility model also provides a gas water heater, comprising the aforementioned mixing device.

[0024] The technical solution of the utility model has the following significant beneficial effects:

[0025] When the mixing device of the utility model is used, a first intercepting portion whose flow area can be changed is provided in the first channel, and a second intercepting portion whose flow area can be changed is provided in the second channel. The moving mechanism is movably arranged on the housing, and the moving mechanism has: a first movement direction for increasing the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion, and a second movement direction for reducing the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion. The moving mechanism can change the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion through movement, thereby playing a role in adjusting the mixing ratio, so as to meet the use needs of different users.

[0026] Furthermore, in order to avoid the problem of cross-flow between the first channel and the second channel, a flexible spacer is sleeved on the moving mechanism, and the flexible spacer can seal and separate the first channel and the second channel. Furthermore, during the movement of the moving mechanism, the moving mechanism will pull the flexible spacer to move synchronously, causing the flexible spacer to deform, thereby ensuring the sealing effect.

[0027] Furthermore, the utility model arranges at least a portion of the flexible spacer to protrude along the first movement direction, and this portion of the flexible spacer with a protruding arrangement can form a deformation portion. By placing the deformation portion in advance on the movement path of the moving mechanism in the first movement direction, when the moving mechanism moves along the first movement direction, only about half of the deformation portion close to the moving mechanism will be deformed synchronously with the moving mechanism, and the position of the other half of the deformation portion will basically not change with the movement of the moving mechanism, thereby reducing the overall deformation of the flexible spacer, which is beneficial to increasing the fatigue life of the flexible spacer and further improving the service life of the mixing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0030] Figure 1 It is a cross-sectional structural schematic diagram of an embodiment of the mixing device of the utility model;

[0031] Figure 2 This is a schematic diagram of the main structure of an embodiment of the mixing device of the utility model;

[0032] Figure 3 This is a schematic diagram of the installation structure of an embodiment of the first shut-off member of the utility model;

[0033] Figure 4 for Figure 3 Schematic diagram of the middle AA section;

[0034] Figure 5 It is a partial schematic diagram of the flexible spacer of the utility model in an initial state;

[0035] Figure 6 A partial schematic diagram of the flexible gap member of the utility model in a deformed state;

[0036] Figure 7 It is a partial schematic diagram of the membrane in the initial state in the prior art;

[0037] Figure 8 It is a partial schematic diagram of the membrane in a deformed state in the prior art.

[0038] Reference numerals of the above drawings:

[0039] 100. Shell;

[0040] 110. a first channel; 111. a first intercepting portion;

[0041] 120, second channel; 121, second intercepting portion;

[0042] 130, mixed channel;

[0043] 140, communicating hole;

[0044] 200, moving mechanism; 210, first medium intercepting member; 220, second medium intercepting member; 230, linkage member; 240, elastic member;

[0045] 300, flexible spacer; 310, fixed portion; 320, follower portion; 330, deformation portion.

[0046] 400. Motor. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] Implementation Method 1

[0049] Please refer to Figure 1 and Figure 2 As shown, a mixing device is provided in an embodiment of the utility model, which mixing device at least includes: a shell 100, a moving mechanism 200 and a flexible spacer 300, the shell 100 includes a first channel 110 for conveying a first medium, a second channel 120 for conveying a second medium, and a mixing channel 130 connecting the first channel 110 and the second channel 120 downstream, the first channel 110 includes a first cut-off portion 111 whose flow area can be changed, and the second channel 120 includes a second cut-off portion 121 whose flow area can be changed.

[0050] The moving mechanism 200 is movably arranged in the shell 100, and the moving mechanism 200 can change the flow area of ​​the first cut-off portion 111 and the flow area of ​​the second cut-off portion 121 through movement; the moving mechanism 200 has: a first movement direction F1 that increases the flow area of ​​the first cut-off portion 111 and the flow area of ​​the second cut-off portion 121, and a second movement direction F2 that reduces the flow area of ​​the first cut-off portion 111 and the flow area of ​​the second cut-off portion 121.

[0051] The flexible spacer 300 is sleeved on the moving mechanism 200 and seals and separates the first channel 110 and the second channel 120 . The flexible spacer 300 can be deformed with the movement of the moving mechanism 200 , and at least part of the flexible spacer 300 is convexly arranged along the first movement direction F1 .

[0052] On the whole, when the mixing device is in use, a first intercepting portion 111 whose flow area can be changed is provided in the first channel 110, and a second intercepting portion 121 whose flow area can be changed is provided in the second channel 120. The moving mechanism 200 can be movably arranged on the shell 100. The moving mechanism 200 can change the flow area of ​​the first intercepting portion 111 and the flow area of ​​the second intercepting portion 121 through movement, thereby playing a role in adjusting the mixing ratio, thereby being able to meet the usage needs of different users.

[0053] Furthermore, in order to avoid the problem of cross-flow between the first channel 110 and the second channel 120, a flexible spacer 300 is sleeved on the moving mechanism 200, and the flexible spacer 300 can seal the first channel 110 and the second channel 120. During the movement of the moving mechanism 200, the moving mechanism 200 will pull the flexible spacer 300 to move synchronously, causing the flexible spacer 300 to deform, thereby ensuring the sealing effect.

[0054] Furthermore, the utility model provides that at least a portion of the flexible spacer 300 is raised along the first movement direction F1, and the portion of the flexible spacer 300 raised can form a deformation portion 330, and that the deformation portion 330 is placed in advance on the movement path of the moving mechanism 200 in the first movement direction F1, so that when the moving mechanism 200 moves along the first movement direction F1, within the effective stroke of the moving mechanism 200, only about half of the deformation portion 330 close to the moving mechanism 200 will deform synchronously with the moving mechanism 200, and the position of the other half of the deformation portion 330 will basically not change with the movement of the moving mechanism 200, thereby reducing the overall deformation of the flexible spacer 300, which is beneficial to increasing the fatigue life of the flexible spacer 300, and further improving the service life of the mixing device.

[0055] Similarly, when the moving mechanism 200 moves along the second movement direction F2, within the effective stroke of the moving mechanism 200, only about half of the deformation portion 330 close to the moving mechanism 200 will move synchronously with the moving mechanism 200 to reset, while the position of the other half of the deformation portion 330 remains basically unchanged when the moving mechanism 200 moves along the first movement direction F1, so the other half of the deformation portion 330 will not be deformed along the second movement direction F2 with the moving mechanism 200.

[0056] In the embodiment of the present invention, the moving mechanism 200 passes through the flexible spacer 300 into the first channel 110 and the second channel 120, so that the moving mechanism 200 can simultaneously change the flow area of ​​the first intercepting portion 111 and the flow area of ​​the second intercepting portion 121 through action.

[0057] In an embodiment of the present invention, the first intercepting portion 111 can be configured as a flow channel section with a smaller flow area in the first channel 110 , so that the flow rate of the medium supplied to the first channel 110 can be adjusted by changing the flow area of ​​the first intercepting portion 111 .

[0058] The second intercepting portion 121 may be configured as a flow channel section with a smaller flow area in the second channel 120 , so that the flow rate of the medium supplied to the second channel 120 can be adjusted by changing the flow area of ​​the second intercepting portion 121 .

[0059] In the implementation manner of the present utility model, the moving mechanism 200 may constitute an integral component, or may be integrated by a plurality of components, which is not specifically limited herein.

[0060] In the embodiment of the present invention, the moving mechanism 200 can be driven by a motor. The motor can drive the moving mechanism 200 to move by direct driving. Alternatively, the motor can also drive the moving mechanism 200 to move by indirect driving.

[0061] Furthermore, the movement mode of the moving mechanism 200 may be rotation, translation, swing or a combination of multiple movements, which is not specifically limited here. Preferably, the moving mechanism 200 performs reciprocating linear motion.

[0062] In a feasible embodiment of the utility model, the first channel 110 is a gas channel, and the second channel 120 is an air channel. The utility model changes the input amount of gas and air while maintaining the mixing ratio of gas and air, thereby changing the amount of mixed gas in the mixing channel 130, and then stably changing the adjustment ratio of the mixing device, which is conducive to stabilizing the subsequent emission of smoke.

[0063] Of course, designers can adjust the medium components transported by the first channel 110 and the second channel 120 according to usage requirements, and no specific limitation is made here.

[0064] The mixing device can seal and separate the first channel 110 and the second channel 120 by using a flexible spacer 300, and the flexible spacer 300 can also deform along with the movement of the moving mechanism 200, thereby reducing interference with the moving mechanism 200, allowing the moving mechanism 200 to move more accurately, thereby being able to better control the mixing ratio of different media, and also helping the mixing device to have a larger adjustment ratio, thereby achieving lower power and maintaining more stable low-load combustion.

[0065] In an embodiment of the present utility model, the housing 100 is provided with a communication hole 140 through which the moving mechanism 200 passes between the first channel 110 and the second channel 120, and the flexible spacer 300 is sleeved on the moving mechanism 200 and seals the communication hole 140. Specifically, the first channel 110 and the second channel 120 have a common channel wall, and the communication hole 140 is provided on the channel wall and penetrates the channel wall.

[0066] In the implementation mode of the present utility model, Figure 3 and Figure 4In the illustrated embodiment, the flexible spacer 300 includes a fixed portion 310 connected to the housing 100 , a follower portion 320 connected to the moving mechanism 200 , and a deformable portion 330 disposed between the fixed portion 310 and the follower portion 320 , wherein the deformable portion 330 is protruded along the first moving direction F1 .

[0067] The flexible spacer 300 is connected to the housing 100 via the fixing portion 310 , and is connected to the moving mechanism 200 via the following portion 320 , while the deformation portion 330 is covered on the communication hole 140 to play a role of sealing and separation.

[0068] Specifically, the flexible spacer 300 is formed by a flexible material, so that the flexible spacer 300 can be deformed. Preferably, the flexible spacer 300 is formed by rubber.

[0069] Of course, in other feasible embodiments, designers can adjust the specific material of the flexible spacer 300 according to usage requirements, and no specific limitation is made here.

[0070] When the moving mechanism 200 moves along the first movement direction F1, only about half of the deformation portion 330 close to the moving mechanism 200 will deform synchronously with the moving mechanism 200, while the position of the other half of the deformation portion 330 will basically not change with the movement of the moving mechanism 200, thereby reducing the overall deformation of the flexible spacer 300, which is beneficial to improving the fatigue life of the flexible spacer 300, and further improving the service life of the mixing device.

[0071] Furthermore, by making the deformation portion 330 move and deform synchronously with the moving mechanism 200 , the first channel 110 and the second channel 120 can be sealed and spaced apart, thereby ensuring a sealing effect.

[0072] In the embodiment of the present utility model, the deformation part 330 is arranged in a ring around the periphery of the moving mechanism 200. By arranging the deformation part 330 in a ring around the periphery of the moving mechanism 200, the deformation part 330 can be distributed more evenly, so that when the moving mechanism 200 moves, the deformation part 330 arranged in a ring can be deformed under the drive of the moving mechanism 200, thereby avoiding the problem of stress concentration on the flexible spacer 300 and improving the fatigue life of the flexible spacer 300.

[0073] Furthermore, the ratio of the maximum height of the deformation part 330 protruding from the membrane body to the moving stroke of the moving mechanism 200 is greater than 1:7. By controlling the ratio between the setting height of the deformation part 330 and the moving stroke of the moving mechanism 200, it is beneficial to keep the deformation amount of the deformation part 330 within the optimal range, and avoid the deformation amount of the deformation part 330 being too large to reduce the service life of the flexible spacer 300.

[0074] Designers can adjust the above ratio according to usage requirements. For example, the ratio of the maximum height of the deformation portion 330 protruding from the membrane body to the moving stroke of the moving mechanism 200 is 1:5, 1:3, 1:2, or 1:1 or other values, and no specific numerical limit is given here.

[0075] In the embodiment of the present invention, when the first intercepting portion 111 and / or the second intercepting portion 121 is in the blocking position, the cross section of the deformable portion 330 is arranged in an arc shape. Preferably, the cross section of the deformable portion 330 is an arc shape, and along the height direction, the arc opening of the deformable portion 330 is arranged downward.

[0076] As attached Figure 5 and Figure 6 In the embodiment shown, the arc-shaped opening of the deformation portion 330 is set downward, so that the deformation portion 330 can be set in the first movement direction F1 of the moving mechanism 200, so that part of the deformation portion 330 can not be deformed along with the moving mechanism 200, thereby reducing the overall deformation of the flexible spacer 300 and improving the service life of the flexible spacer 300.

[0077] Of course, designers can adjust the specific structure of the deformation portion 330 according to usage requirements, such as setting the cross-section of the deformation portion 330 to an inverted V shape, an inverted C shape, etc., and no specific limitation is made here.

[0078] In an embodiment of the present invention, a plurality of deformation parts 330 are provided, and along a direction from the fixed part 310 to the follower part 320 , a plurality of deformation parts 330 are arranged on the flexible spacer 300 in an interval ring.

[0079] By providing a plurality of deformation parts 330, the flexible spacer 300 can be formed into a corrugated shape with a larger deformation range, thereby better meeting the motion requirements of the moving mechanism 200. Designers can adjust the number and arrangement of the deformation parts 330 according to usage requirements, and no specific restrictions are imposed here.

[0080] Furthermore, the cross-sectional structures of the deformation portions 330 may be set to the same shape, or the cross-sectional shapes of the deformation portions 330 may be set to different shapes according to usage requirements, which is not specifically limited here.

[0081] In an embodiment of the present invention, the flexible spacer 300 includes a membrane, a fixing portion 310 is provided on the outer side of the membrane, a follower portion 320 is provided on the inner side of the membrane, and at least part of the membrane sheet is raised along the first movement direction F1 to form a deformation portion 330 .

[0082] Preferably, the cross section of the deformation part 330 on the membrane is U-shaped. By setting the membrane upside down, the deformation part 330 is set in the first movement direction F1 of the moving mechanism 200, and the opening of the deformation part 330 is set downward. At this time, the membrane can move synchronously with the moving mechanism 200 to play a sealing role.

[0083] And, if Figure 5 and Figure 6 In the illustrated embodiment, at least a portion of the deformation portion 330 is not deformed along with the membrane, thereby reducing the overall deformation of the membrane and extending the fatigue service life of the membrane.

[0084] In the prior art, the deformed portion of the membrane is arranged downward, such as Figure 7 and attached Figure 8 When the diaphragm moves with the moving mechanism, the diaphragm set downward has a larger deformation, thereby reducing the fatigue life of the diaphragm.

[0085] Specifically, when using the same membrane, the service life of the membranes set up in two ways, namely, the upright membrane in the prior art and the inverted membrane in the present application, can be roughly measured through a cycle life test. The upright membrane in the prior art will crack and tear after about 45,000 deformations, while the inverted membrane in the present application can still maintain normal operation after 135,000 deformations, thereby significantly improving the service life of the membrane and thereby increasing the service life of the mixing device.

[0086] In an embodiment of the utility model, the moving mechanism 200 includes a first medium shut-off member 210, a second medium shut-off member 220, and a linkage member 230. The linkage member 230 connects the first medium shut-off member 210 and the second medium shut-off member 220 to link the first medium shut-off member 210 with the second medium shut-off member 220. The first medium shut-off member 210 can be adjustably disposed in the first shut-off portion 111, and the second medium shut-off member 220 can be adjustably disposed in the second shut-off portion 121.

[0087] When the linkage member 230 is hard-connected with the first medium intercepting member 210 and the second medium intercepting member 220, that is, when the linkage rod is connected with the first medium intercepting member 210 and the second medium intercepting member 220 by threaded connection, welding, bolt connection, etc., it is easy to cause assembly tolerance in the position between the first medium intercepting member 210 and the second medium intercepting member 220, or when the first medium intercepting member 210 and the second medium intercepting member 220 are used for a long time, it is easy to cause assembly tolerance, and it is difficult to ensure that the first medium intercepting member 210 and the second medium intercepting member 220 reach the target blocking position at the same time, so it is difficult to form an effective seal, thereby reducing the control accuracy of the mixing ratio.

[0088] In order to solve the above problem, in the embodiment of the present utility model, the linkage member 230 and the first medium intercepting member 210 are connected via an elastic member 240 .

[0089] Specifically, a receiving groove is provided at the upper end of the linkage member 230, and one end of the elastic member 240 is located in the receiving groove and fixedly sleeved on the positioning column in the receiving groove. The other end of the elastic member 240 is fixedly sleeved on the connecting protrusion of the connecting end of the first medium intercepting member 210, so that the elastic member 240 realizes the soft connection between the linkage member 230 and the first medium intercepting member 210 and the second medium intercepting member 220, which is conducive to ensuring that the first medium intercepting member 210 and the second medium intercepting member 220 reach the blocking position at the same time to play a blocking role.

[0090] When the first medium intercepting member 210 and the second medium intercepting member 220 reach the blocking position at the same time, the elastic member 240 is in a stretched state.

[0091] In a feasible embodiment, when the first channel 110 is a gas channel and the second channel 120 is an air channel, the first medium shut-off member 210 can be set as a gas valve core, the second medium shut-off member 220 can be set as an air shut-off plate, the linkage member 230 can be set as a linkage rod, and the elastic member 240 can be set as a spring.

[0092] Of course, designers can adjust the specific structures of the linkage member 230, the first medium intercepting member 210 and the second medium intercepting member 220 according to usage requirements, and no specific limitation is made here.

[0093] In an embodiment of the utility model, the first channel 110 also has a first medium valve port, the first medium valve port is connected to the first cut-off portion 111, and the first medium cut-off component 210 has a first medium blocking position for blocking the first medium valve port; when the first medium cut-off component 210 is in the first medium blocking position, the mixing device is also provided with a first connecting portion for connecting the first channel 110 located downstream of the first medium valve port with the first channel 110 located upstream of the first medium valve port.

[0094] Specifically, a first medium valve seat is provided in the first channel 110, and a first medium valve port is formed in the first medium valve seat. In addition, the first channel 110 also has a first medium input port located upstream of the first medium valve port. A first intercepting portion 111 is formed between the first medium intercepting member 210 and the first medium valve port.

[0095] In addition, the first communication portion includes a first normal through hole provided on the first medium valve seat, and the first normal through hole is separated from the first medium shut-off member 210. When the first medium shut-off member 210 is located at the first medium blocking position, the first normal through hole is not blocked by the first medium shut-off member 210, so that the first medium valve seat is kept connected between the upstream and downstream under a small load, thereby maintaining stable combustion under a small load.

[0096] In other feasible embodiments, the first communication portion may also be a notch structure arranged at the edge of the first medium valve port, and is not separated from the first medium valve port. Of course, the first communication portion may also be arranged on other components, which is not specifically limited here.

[0097] Furthermore, the upper end of the first medium shut-off member 210 and the mating end of the first medium valve seat are designed with a gradual arc. During the operation of the moving mechanism 200, the first medium shut-off member 210 adjusts the flow area between the first medium valve port by changing its outer wall surface, thereby changing the input amount of the first medium, thereby achieving a wide range of regulation.

[0098] In an embodiment of the utility model, the second channel 120 also has a second medium valve port, the second medium valve port is connected to the second cut-off portion 121, and the second medium cut-off component 220 has a second medium blocking position for blocking the second medium valve port; when the second medium cut-off component 220 is located at the second medium blocking position, the mixing device is also provided with a second connecting portion for connecting the second channel 120 located downstream of the second medium valve port with the second channel 120 located upstream of the second medium valve port.

[0099] In one feasible embodiment, the second connecting portion includes a second constant through hole located on the second medium shutoff member 220 and penetrating the second medium shutoff member 220. The second connecting portion is provided to facilitate accurate control of the small load air-fuel ratio, thereby reducing the minimum load and achieving a higher adjustment ratio range.

[0100] Of course, in other feasible embodiments, the second communication hole 140 may also be a notch structure arranged at the outer edge of the second medium valve port, which is not specifically limited here.

[0101] Along the airflow direction of the second medium, the inner cross section of the second intercepting portion 121 gradually decreases, and the outer side wall of the second medium intercepting member 220 and the second intercepting portion 121 perform axial linear reciprocating motion to change the flow area of ​​the second intercepting portion 121 .

[0102] In a feasible embodiment of the present invention, a venturi tube structure is provided between the first channel 110 , the second channel 120 and the mixing channel 130 .

[0103] By setting a Venturi structure between the first channel 110, the second channel 120 and the mixing channel 130, the gas medium flowing from the second channel 120 to the mixing channel 130 can generate negative pressure through the Venturi tube structure to suck the medium in the first channel 110, thereby improving the mixing effect of the medium in the first channel 110 and the medium in the second channel 120.

[0104] In another feasible embodiment of the present invention, the first channel 110, the second channel 120 and the mixing channel 130 cooperate to form a venturi tube structure. By directly using the first channel 110, the second channel 120 and the mixing channel 130 to form the venturi tube structure, it is helpful to simplify the internal structure of the housing 100, thereby reducing the manufacturing cost of the mixing device.

[0105] For example, when the first channel 110 is a gas channel and the second channel 120 is an air channel, air flows to the mixing channel 130 through the air channel and generates negative pressure to suck the gas in the gas channel.

[0106] Of course, designers can adjust the configuration of the Venturi tube according to usage requirements, and no specific restrictions are made here.

[0107] In the embodiment of the utility model, a conical tube structure is provided in the housing 100, and the conical tube structure forms a contraction section of the venturi tube structure. The first channel 110 is located outside the contraction section, and after being accelerated by the contraction section, negative pressure is generated through the throat section, and the medium in the first channel 110 is sucked.

[0108] The mixing device of the utility model can adjust the mixing ratio through the action of the moving mechanism 200, and by coordinating the change of the fan speed, the subsequent combustion process is made more stable. Among them, the internal flow area of ​​the mixing channel 130 of at least a part of the length gradually increases along the flow direction of the internal airflow, thereby forming a diffusion section of the venturi tube structure. Between the diffusion section and the contraction section is a throat section whose flow area remains roughly unchanged along the flow direction. The first channel 110 is connected to the throat section. The end of the mixing channel 130 forms a gas output port.

[0109] Implementation Method 2

[0110] The utility model also provides a gas water heater, which includes the mixing device described in the first embodiment. The specific structure, working principle and beneficial effects of the mixing device are the same as those described in the first embodiment, and are not repeated here. The gas water heater can reduce the overall deformation of the flexible spacer 300 by using the mixing device described in the first embodiment, thereby increasing the fatigue life of the flexible spacer 300, thereby increasing the service life of the gas water heater and improving the user experience.

[0111] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps here also contemplates the implementation method consisting essentially of these elements, ingredients, parts or steps. Here, by using the term "may", it is intended to illustrate that any attribute described that "may" includes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

[0112] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A mixing device, characterized in that: include A housing, the housing comprising a first channel for conveying a first medium, a second channel for conveying a second medium, and a mixing channel connecting the first channel and the downstream of the second channel, the first channel comprising a first intercepting portion whose flow area can be changed, and the second channel comprising a second intercepting portion whose flow area can be changed; A moving mechanism is movably arranged in the housing, and the moving mechanism can change the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion by action; the moving mechanism has: a first movement direction for increasing the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion, and a second movement direction for reducing the flow area of ​​the first intercepting portion and the flow area of ​​the second intercepting portion; A flexible spacer is sleeved on the moving mechanism and seals and separates the first channel and the second channel. The flexible spacer can be deformed with the movement of the moving mechanism, and at least part of the flexible spacer is convexly arranged along the first movement direction.

2. The mixing device according to claim 1, characterized in that The housing is provided with a communication hole through which the moving mechanism passes between the first channel and the second channel, and the flexible spacer is sleeved on the moving mechanism and seals the communication hole.

3. The mixing device according to claim 1, characterized in that The flexible spacer comprises: a fixed portion connected to the housing, a follower portion connected to the moving mechanism, and a deformable portion arranged between the fixed portion and the follower portion, wherein the deformable portion is protruding along the first moving direction.

4. The mixing device according to claim 3, characterized in that The deformation portion is arranged around the periphery of the moving mechanism.

5. The mixing device according to claim 3, characterized in that When the first intercepting portion and / or the second intercepting portion is in the blocking position, the cross section of the deformation portion is arranged to be arc-shaped.

6. The mixing device according to claim 3, characterized in that The deformation part is provided in plurality, and along the direction from the fixed part to the follower part, a plurality of deformation part spacer rings are arranged on the flexible spacer.

7. The mixing device according to claim 3, characterized in that The flexible spacer comprises a membrane, the outer side edge of the membrane is provided with the fixing portion, the inner side edge of the membrane is provided with the following portion, and at least a portion of the membrane sheet of the membrane is raised along the first movement direction to form the deformation portion.

8. The mixing device according to claim 7, characterized in that The ratio of the maximum height of the deformation portion protruding from the main body of the membrane to the moving stroke of the moving mechanism is greater than 1:

7.

9. The mixing device according to claim 1, characterized in that The moving mechanism includes a first medium cut-off member, a second medium cut-off member, and a linkage member, wherein the linkage member connects the first medium cut-off member and the second medium cut-off member so that the first medium cut-off member and the second medium cut-off member are linked, the first medium cut-off member is adjustably disposed in the first cut-off portion, and the second medium cut-off member is adjustably disposed in the second cut-off portion.

10. The mixing device according to claim 9, characterized in that The first channel also has a first medium valve port, the first medium valve port is connected to the first intercepting portion, and the first medium intercepting member has a first medium blocking position for blocking the first medium valve port; When the first medium shut-off member is in the first medium blocking position, the mixing device is further provided with a first connecting portion connecting the first channel located downstream of the first medium valve port with the first channel located upstream of the first medium valve port.

11. The mixing device according to claim 9, characterized in that The second channel also has a second medium valve port, the second medium valve port is connected to the second intercepting portion, and the second medium intercepting member has a second medium blocking position for blocking the second medium valve port; When the second medium shut-off member is located at the second medium blocking position, the mixing device is further provided with a second connecting portion connecting the second channel located downstream of the second medium valve port with the second channel located upstream of the second medium valve port.

12. The mixing device according to claim 1, characterized in that A venturi tube structure is provided between the first channel, the second channel and the mixing channel; or the first channel, the second channel and the mixing channel cooperate to form a venturi tube structure.

13. The mixing device according to claim 1, characterized in that The first medium channel is a gas channel, and the second medium channel is an air channel.

14. A gas water heater, characterized in that: Comprising a mixing device as claimed in any one of claims 1 to 13.

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