CN212719747U - Backflow-preventing premixer and gas water heater - Google Patents
Backflow-preventing premixer and gas water heater Download PDFInfo
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- CN212719747U CN212719747U CN202021407678.9U CN202021407678U CN212719747U CN 212719747 U CN212719747 U CN 212719747U CN 202021407678 U CN202021407678 U CN 202021407678U CN 212719747 U CN212719747 U CN 212719747U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
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- 238000002485 combustion reaction Methods 0.000 abstract description 17
- 239000000446 fuel Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 91
- 239000000047 product Substances 0.000 description 31
- 230000006872 improvement Effects 0.000 description 13
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- 238000010586 diagram Methods 0.000 description 6
- 239000002737 fuel gas Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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Abstract
本实用新型公开了一种防倒流预混器及燃气热水器，防倒流预混器包括壳体，所述壳体中设有预混腔，所述预混腔包括出气通路；挡板，所述挡板连接于所述壳体中，所述挡板具有第一位置与第二位置，且所述挡板在所述第一位置与第二位置之间可连续地移动，所述挡板在所述第一位置时阻断所述预混腔的出气通路，所述挡板从所述第一位置移动到所述第二位置时，所述出气通路的开度逐渐增大；燃气通道，所述燃气通道与所述预混腔连通。本实用新型通过在预混器中增加了挡板，利用挡板完全封住预混腔，大大提高产品安全性。同时通过挡板的逐渐移动，使得热水器中的空气与燃气按预定的负荷区间中维持稳定的空燃比，实现燃气在热水器整机中的稳定并完全燃烧。
The utility model discloses an anti-backflow premixer and a gas water heater. The anti-backflow premixer comprises a casing, a premixing cavity is arranged in the casing, and the premixing cavity comprises an air outlet passage; a baffle plate, the The baffle is connected in the housing, the baffle has a first position and a second position, and the baffle is continuously movable between the first position and the second position, and the baffle is in In the first position, the gas outlet passage of the premixing chamber is blocked, and when the baffle plate moves from the first position to the second position, the opening degree of the gas outlet passage gradually increases; the gas passage, The gas passage communicates with the premixing chamber. By adding a baffle in the premixer, the utility model uses the baffle to completely seal the premixing cavity, thereby greatly improving product safety. At the same time, through the gradual movement of the baffle, the air and gas in the water heater maintain a stable air-fuel ratio in the predetermined load interval, so as to realize the stable and complete combustion of the gas in the whole water heater.
Description
Technical Field
The utility model relates to a gas heater technical field, especially carry out the blender that mixes in full advance to air and gas among the gas heater.
Background
In a gas water heater, gas combustion is classified into diffusion combustion, partial premixed combustion (atmospheric combustion), and full premixed combustion. The fully premixed combustion (premixed combustion) refers to a process of fully mixing air and fuel gas in advance according to a certain proportion to form premixed gas, and then igniting and combusting the premixed gas in a combustor. Premixed combustion generally occurs in a relatively closed system. The premixed combustion has the advantages that the gas and the air (oxygen) are fully mixed before combustion, so that the flame propagation speed is higher, the combustion temperature is higher, the ductility is better compared with that of diffusion combustion, and the premixed combustion has a good application prospect on a gas water heater.
In northern winter, outdoor temperature is generally below zero, indoor temperature is more than 20 ℃, and the temperature difference formed enables outdoor cold air to easily enter the water heater through a smoke exhaust channel of the gas water heater, so that a heat exchanger of the water heater is frozen (water is frozen and burst into a water pipe), a backflow preventing device is generally added to a smoke exhaust port of the water heater for a non-condensing machine, most of the fully premixed combustion water heater is a condensing machine, and if the backflow preventing device is added to the smoke exhaust port, the backflow preventing device can be frozen by the frozen condensed water and cannot be opened, and the water heater cannot work.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prevent backflow and mix ware in advance to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.
The utility model provides a solution of its technical problem is:
a backflow prevention premixer, comprising:
the air conditioner comprises a shell, wherein a premixing cavity is arranged in the shell, the premixing cavity is arranged in the shell in a penetrating manner, and the premixing cavity comprises an air outlet passage;
a baffle connected in the housing, the baffle having a first position and a second position, and the baffle being continuously movable between the first position and the second position, the baffle blocking an outlet passage of the premix chamber when in the first position, the baffle moving from the first position to the second position gradually increasing in opening of the outlet passage;
and the gas channel is communicated with the premixing cavity.
The utility model has the advantages that: the utility model discloses an increased the baffle in premixing the ware, in inoperative, utilize the baffle to seal completely and mix the chamber in advance, let the air current can not produce the refluence, prevent that cold air from flowing back to the heat exchanger and causing the damage, also prevent that the high temperature flue gas from flowing back inside fan and the water heater, protection product normal use improves its life, improves product security greatly. And when the water heater works, the baffle plate gradually moves, so that the air and the gas in the water heater maintain a stable air-fuel ratio in a preset load interval, and the gas is stably and completely combusted in the whole water heater.
As a further improvement of the above technical solution, the baffle blocks the air outlet passage by its own weight, and the housing is provided with an inclined table surface on the peripheral wall of the premixing chamber; when the baffle is in the first position, one end of the baffle is hinged to the shell, and the other end of the baffle inclines downwards and is abutted to the table top. The baffle realizes the plugging of the baffle by utilizing the self gravity. When the water heater works, the fan is arranged on the water heater, negative pressure generated by the fan overcomes the gravity of the baffle to open the baffle, when the water heater does not work, the fan stops running, and the baffle is restored to the first position under the action of the gravity of the water heater. The inclined table board is equivalent to a limiting seat, so that the baffle has an initial state with certain inclination, and the baffle is convenient to open in the subsequent work.
As a further improvement of the above technical solution, one end of the baffle is hinged to the housing, and an elastic member is disposed between the baffle and the housing, and applies a force to the baffle to move to the first position. The baffle plate can be restored to the first position by utilizing gravity, and the position can also be restored by utilizing an elastic piece, wherein one end of the elastic piece is abutted to the baffle plate, the other end of the elastic piece is abutted to the shell, and the elastic piece forces the baffle plate to move to the first position.
As a further improvement of the technical scheme, the elastic piece is a compression spring, one end of the elastic piece is adjustably connected with the shell, and the other end of the elastic piece is abutted against the baffle. For example, a threaded part can be arranged in the shell, the threaded part is in threaded connection with the shell, one end of the threaded part is abutted to the compression spring, and the precompression force of the elastic part can be adjusted by adjusting the initial position of the threaded part, so that the opening force of the baffle plate is adjusted.
As a further improvement of the technical scheme, a cover plate is further arranged in the premixing cavity, the cover plate inclines downwards from back to front, the upper end of the cover plate is hinged with the inner surface of the shell, and the cover plate covers the gas channel under the action of self weight. Through increasing the apron, the gas export is sealed can not discharge the gas when the baffle is not opened, stops because the risk of pneumatic valve maloperation or trouble direct discharge gas, improves the product security.
As a further improvement of the above technical solution, the gas channel includes a gas outlet, and when the baffle is in the first position, the gas outlet abuts against the baffle. The gas outlet and the gas outlet passage are sealed by the baffle plate, so that the structure of the premixer is simpler.
As a further improvement of the technical scheme, the number of the premixing cavities is two, the two premixing cavities are arranged side by side from left to right, and the two premixing cavities are venturi tubes; the baffle plates are arranged in the two premixing cavities. The two premixing chambers arranged in parallel are provided with gas outlets, so that the adjusting range of the heat load of the product can be enlarged under the same fan rotating speed during working, the range of adjusting the temperature is enlarged, the comfort of the product is improved, and the product is especially suitable for heavy-load products.
As a further improvement of the above technical solution, the two premix chambers are respectively a first premix chamber and a second premix chamber, and a minimum cross-sectional area of the first premix chamber is larger than a minimum cross-sectional area of the second premix chamber. The cross-sectional areas of the two premixing cavities are different, so that the heat load regulation ratio of the water heater can be further increased.
As a further improvement of the above technical solution, the two baffles are respectively a first baffle and a second baffle, the first baffle is installed in the first premixing chamber, the second baffle is installed in the second premixing chamber, and the driving force of the first baffle is greater than the driving force of the second baffle. The baffle plates of two or more premixing chambers, wherein one baffle plate has small mass m, or the stress area S of the baffle plate is large, or the value of the acute angle B is small, the driven acting force of the baffle plate is small, and when the baffle plate works, under the action of the same rotating speed of the fan, the baffle plate is opened firstly, and the other baffle plate is not opened, so that the segmented air inlet combustion is formed, the adjusting range of the heat load of the water heater can be improved, the adjusting temperature range is improved, the product comfort is improved, and particularly in a heavy-load product.
As a further improvement of the above technical solution, a regulating device is provided in the gas channel, and the regulating device is used for regulating the minimum flow area of the gas channel. The gas channel is internally provided with the adjusting device, so that the mass and unified production of products is facilitated, the production efficiency is improved, the product cost is reduced, the products with different gas sources can be adjusted only by replacing the adjusting device or part of parts, and the sold products are more facilitated to carry out gas source replacement and the like. Or can be adjusted to adapt to the larger change of the same air source through fine adjustment. The adjusting device can be used for adjusting the sizes of the nozzles with different sizes, the objects with different areas are generated at different angles, the objects with different cross sections are generated at different depths, and the like.
As a further improvement of the above technical solution, the adjusting device includes a connecting portion and an adjusting portion connected to each other, the connecting portion is disposed on a peripheral wall of the gas passage and rotatably connected to the housing, the adjusting portion is at least partially located in the gas passage, and the adjusting portion changes a minimum flow area of the gas passage with rotation of the connecting portion.
As a further improvement of the above technical solution, the gas channel includes a first adjusting section and a second adjusting section which are connected in series in sequence, the first adjusting section and the second adjusting section are perpendicular to each other, the connecting portion is disposed on the peripheral wall of the first adjusting section and rotatably connected to the housing, the adjusting portion is inserted into the second adjusting section and disposed on two of the gas channel, and the adjusting devices are disposed side by side. Two adjusting device set up side by side, are convenient for the homonymy to be adjusted.
As a further improvement of the technical scheme, the gas channel is in a circular tube shape, the adjusting part is located at the joint of the first adjusting section and the second adjusting section, the adjusting part is in a block shape, the cross sectional area of the adjusting part is matched with the pipe diameter of the second adjusting section, and the adjusting part is eccentrically arranged on the connecting part. Like this, through rotating connecting portion for connecting portion are located 0 °, 90 and 180 three different positions respectively, and on three different positions, the regulation portion can realize the adjustment to three kinds of differences of the minimum flow area of gas passageway, just can realize three kinds of flow area's regulation effect.
As a further improvement of the above technical solution, the adjusting device further comprises an electric adjusting part for controlled driving of the connecting part; and/or, the adjusting device further comprises a manual adjusting part, wherein the manual adjusting part is at least partially exposed out of the shell and is used for driving the connecting part.
And simultaneously, the utility model also provides a gas heater who uses above-mentioned backflow prevention premixer.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a force analysis diagram according to a first embodiment of the present invention;
fig. 3 is a schematic view of an operating state of a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a third embodiment of the present invention;
fig. 6 is a schematic perspective view of a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a fourth embodiment of the present invention;
fig. 8 is a schematic perspective view of an adjusting device according to the present invention;
fig. 9 is a schematic view of the installation of the adjusting device of the present invention;
FIG. 10-A is a schematic view of a first state of the adjustment device of the present invention;
FIG. 10-B is a schematic view of a second state of the adjustment device of the present invention;
fig. 10-C is a third state diagram of the adjustment device of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. The preferred embodiment of the present invention is shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution. Meanwhile, all technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
The first embodiment is as follows: referring to fig. 1 to 3, a backflow prevention premixer includes: the gas mixing device comprises a shell 100, wherein a premixing cavity 110 is arranged in the shell 100, the premixing cavity 110 sequentially comprises a contraction section 101, a throat 102 and a diffusion section 103 from back to front, and the diffusion section 103 comprises a gas outlet passage; a baffle 200 is arranged in the diffusion section 103 of the premixing cavity 110, the baffle 200 is inclined downwards from back to front, the upper end of the baffle 200 is hinged with the inner surface of the shell 100, a shoulder is arranged in the diffusion section 103, the shoulder is provided with an inclined table top, the baffle 200 has a first position and a second position, the baffle 200 can continuously move between the first position and the second position, when the baffle 200 is in the first position, the baffle 200 is abutted with the table top and completely blocks the diffusion section 103, namely, the air outlet passage of the premixing cavity 110 is blocked, and when the baffle 200 moves from the first position to the second position, the opening degree of the air outlet passage is gradually increased; a gas channel 120 is arranged in the throat 102, and the gas channel 120 is communicated with the premixing cavity 110.
When the backflow preventing premixer is used, the backflow preventing premixer is installed in a water heater, the water heater is not in operation, and the baffle 200 is obliquely arranged and is always kept at the first position under the gravity of the water heater, so that the diffusion section 103 is blocked, the cold air is effectively prevented from flowing back to the heat exchanger in the water heater to cause damage, the high-temperature smoke is also prevented from flowing back to the inside of the fan and the water heater, the normal use of a product is protected, the service life of the product is prolonged, and the safety of the product is greatly improved. When the water heater works, the fan is arranged in the water heater, when the fan is started, pressure difference is generated between the front side and the rear side of the premixer, and the air passes through the premixer from back to front due to the pressure difference. When the gas passes through the premixing cavity 110 from back to front, the premixing cavity 110 is similar to a venturi tube structure, and because the gas passes through the contraction section 101, the throat 102 and the diffusion section 103 in sequence, after the air and the fuel gas pass through the throat 102 of the premixing cavity, different pressure differences and flow speed differences are generated on the front side and the rear side of the throat 102. A throat 102 with a smaller section is arranged between the inlet and the outlet, and according to the formula, the gas flow rate Q is the gas flow speed V multiplied by the section area S, the gas flow speed V2 of the throat 102 is V1 multiplied by S1/S2, and the gas flow speed V changes along with the difference of the section area S.
The baffle 200 automatically adjusts the heat load principle under the action of the fan:
referring to fig. 2 and 3, when the fan is in operation, a forward pulling force F is generated on the bafflePulling deviceThe pulling force P breaking out an F1Is pulled byForce; the baffle 200 receives a downward gravity G under the action of its own weight, and the gravity G decomposes to a pressure F2When the fan sucks the baffle 200 to rotate and open, F1*L＞F2*L(for ease of comparison, the distance L from the two forces to the centre of rotation), F1＝FPulling device*COSB，F2＝G*SINB，G＝mg，FPulling device＝PSuction device*SBaffle(wherein P isSuction deviceAfter the fan is started, the fan applies the wind pressure on the baffle plate, SBaffleThe area of the baffle).
The formula becomes: pSuction device*SBaffle*COSB＞mg*SINB；
Condition of the flap stopping at a certain position: pSuction device*SBaffleCOSB (total of one hundred percent) SINB, the amount of fuel gas and air sucked by the fan is the magnitude of heat load, and the gas flow Q of the mixed gas is mu A/2 gPSuction device。
Referring to fig. 3, the opening a of the baffle plate and the plane of the gas mixing chamber is proportional to the included angle D between the baffle plate and the plane of the gas mixing chamber, B is the included angle between the baffle plate and the vertical line, and E is the included angle between the plane of the gas mixing chamber and the vertical line. B ═ D + E. When the rotating speed of the fan is higher, P isSuction deviceThe larger the value of (A), the larger the opening A between the baffle plate and the plane of the gas mixing cavity, and the larger the gas flow Q of the gas mixture, the larger the heat load.
Referring to fig. 1, in a further preferred embodiment, a cover plate 300 is further disposed in the premix chamber 110, the cover plate 300 is inclined downward from the rear to the front, an upper end of the cover plate 300 is hinged to an inner surface of the casing 100, and the cover plate 300 covers the gas channel 120 under the action of its own weight. When the baffle 200 is not opened, the gas outlet of the gas channel 120 is covered by the cover plate 300, so that the gas channel cannot discharge gas, the risk of directly discharging gas due to gas valve misoperation or failure is avoided, and the product safety is improved. The cover plate 300 also blocks the gas channel 120 by using its own gravity, and similarly, since the baffle 200 and the cover plate 300 both receive the function of the fan of the water heater when in operation, the cover plate 300 can be turned upwards to be opened.
Example two:
referring to fig. 4, in contrast to the first embodiment, the gas outlet of the gas channel 120 is horizontal and forward, and the gas outlet is a slope that is coplanar with the shoulder surface, so that the gas outlet abuts the baffle 200 when the baffle 200 is in the first position.
In order to block the gas outlet, a cover plate is added in the first embodiment, and the baffle 200 can simultaneously block the gas outlet and the premix chamber 110 by skillfully setting the position of the gas outlet in the present embodiment.
Example three:
referring to fig. 5, in the present embodiment, by adding an elastic member 400 (e.g., a compression spring), one end of the elastic member 400 abuts against the baffle 200 and the other end abuts against the housing 100, the elastic member 400 forces the baffle 200 to move to the first position. The arrangement of the elastic member 400 shown in fig. 5 is only schematic.
Unlike the first embodiment, the shutter 200 of the first embodiment is closed by its own weight, and the present embodiment uses the elastic force of the elastic member 400. The premixer of the first embodiment is blocked by using gravity, so that the installation direction is limited, and the premixer needs to be vertically installed, but after the elastic piece is added, the installation of the premixer is more flexible, is not limited by the gravity any more, and is more convenient to use. The baffle 200 is under the action of elasticity, and the baffle 200 is under the combined action of the elasticity and the draught fan suction force, so that the certain sealing force of the plane of the gas mixing cavity and the gas outlet of the baffle 200 can be ensured, but the baffle is not too large to be opened, and the safety and the adaptability of the product are improved.
Furthermore, it is further preferable that a screw member, which may be a bolt or the like, is added in the housing, the screw member is in threaded connection with the housing, one end of the screw member abuts against the compression spring, and the screw member is moved in the housing by rotating the screw member, so that the initial position of the screw member is adjusted, that is, the pre-compression force of the elastic member is adjusted, and the opening force of the baffle plate is adjusted. E.g. the screw member, will move inwards and the resilient member will be compressed further and the opening force of the shutter will increase. Conversely, when the screw member is moved outward, the elastic member is released and the shutter is more easily opened.
Example four:
referring to fig. 6 to 8, on the basis of the premixer of the first embodiment, there are two premixing chambers 110, the two premixing chambers 110 are arranged side by side from left to right, and both the two premixing chambers 110 are venturi tubes; the baffle 200 is disposed in each of the two premixing chambers 110. The two premixing cavities 110 arranged in parallel are provided with gas outlets, so that the adjusting range of the heat load of the product can be enlarged, the adjusting temperature range can be enlarged, the comfort of the product can be improved, and the product is especially suitable for heavy-load products. Moreover, the two premixing chambers 110 are both of venturi structures, so that the air and the fuel gas are more uniform when being mixed.
In a further preferred embodiment, the two premix chambers 110 are a first premix chamber 111 and a second premix chamber 112, respectively, and the minimum cross-sectional area of the first premix chamber 111 is larger than the minimum cross-sectional area of the second premix chamber 112. The minimum cross-sectional areas of the two premixing cavities 110 are not consistent, and the sizes of the two corresponding gas outlets are also not consistent, so that the adjusting range of the heat load of the product can be enlarged, the range of adjusting the temperature can be enlarged, the comfort of the product can be improved, and the gas can be saved. Of course, in some embodiments, the minimum cross-sectional areas of the two premixing chambers are the same, and the sizes of the two corresponding gas outlets are the same, which facilitates simple production and prevents errors.
Further as a preferred embodiment, the two baffles 200 are a first baffle 210 and a second baffle 220, respectively, the first baffle 210 is installed in the first premixing chamber 111, the second baffle 220 is installed in the second premixing chamber 112, and the driving force of the first baffle 210 is greater than that of the second baffle 220.
The driven acting force is equivalent to the opening force of the baffle, the two baffles with inconsistent driven acting forces have inconsistent opening degrees under the suction force of the fan at the same rotating speed, the regulation range of the heat load of the product can be improved, the regulation temperature range is improved, the product comfort is improved, and the baffle is particularly suitable for products with large load.
According to the above force analysis, if the suction baffle of the fan is rotated to be opened, FPulling device*L＞FPress and pressL (for easy comparison, the same distance L from the two forces to the center of rotation), FPulling device＝FSuction device*COSB，FPress and press＝G*SINB，G＝mg，FSuction device＝PSuction device*SBaffle，
The formula becomes: pSuction device*SBaffle*COSB＞mg*SINB，
When the rotating speed of the fan is higher, P isSuction deviceThe larger the value of (A), when the rotating speed of the fan is fixed, PSuction deviceThe value of (2) is determined; the larger the force bearing area S of the baffle plate isBaffleThe larger the value of (A), S when the baffle is fixedBaffleThe value of (2) is determined; the smaller the value of the acute angle B formed by the plane of the air mixing cavity completely sealed and contacted with the baffle and the vertical line is, the larger the value of COSB is, the smaller the initial value of the acute angle B is, and FPulling deviceThe larger the more easily the rotating flap opens. The acute angle B is the angle the baffle makes with the vertical.
On the other hand, the smaller the mass m of the baffle plate, FPress and pressThe smaller the value of the acute angle B formed by the plane of the air mixing cavity contacted with the baffle plate and the vertical line is, the smaller the value of SINB is, and FPress and pressIt is small and easy to rotate the flap open.
The mass m of one baffle 200 in the two premixing cavities 110 is small, or the stress area S of the baffle is large, or the value of the acute angle B is small, the driven acting force is small, the baffle is opened firstly, the other baffle is not opened, and the segmented air inlet combustion is formed, so that the regulation range of the heat load of the product can be improved, the regulation temperature range is improved, and the product comfort is improved, especially in products with large loads. However, the value of the acute angle B cannot be set too small, and F is set too smallPress and pressA too small flap is easy to open. For example, one air mixing cavity plane is set to be 20 degrees, the other air mixing cavity plane is set to be 40 degrees, the SIN40/SIN20 is 1.879, the gravity force components of the two air mixing cavities are different by 2 times, and the product heat load regulation ratio is effectively improved.
Referring to fig. 7 to 10-C, in a further preferred embodiment, a regulating device 500 is provided in the gas channel 120, and the regulating device 500 is used for regulating the minimum flow area of the gas channel 120.
Further as a preferred embodiment, the adjusting device 500 includes a connecting portion 510 and an adjusting portion 520, the connecting portion 510 is disposed on a peripheral wall of the gas channel 120 and is rotatably connected to the housing 100, the adjusting portion 520 is at least partially located in the gas channel 120, and the adjusting portion 520 changes a minimum flow area of the gas channel 120 according to the rotation of the connecting portion 510.
Referring to fig. 7 and 9, in a further preferred embodiment, the gas channel 120 includes a first adjusting segment 121 and a second adjusting segment 122 connected in series in sequence, the first adjusting segment 121 and the second adjusting segment 122 are perpendicular to each other, the connecting portion 510 is disposed on a peripheral wall of the first adjusting segment 121 and rotatably connected to the housing 110, the adjusting portion 520 is inserted into the second adjusting segment 122, and the two adjusting devices 500 disposed on the two gas channels 120 are disposed side by side.
Referring to fig. 8 and 9, further as a preferred embodiment, the gas channel 120 is in a shape of a circular tube, a tube diameter of the first adjusting section 121 is a, a tube diameter of the second adjusting section 122 is b, the adjusting portion 520 is located at a joint of the first adjusting section 121 and the second adjusting section 122, a center line of the connecting portion 510 coincides with a center line of the second adjusting section 122, the adjusting portion 520 is in a block shape, a length of the adjusting portion 520 is l, a width of the adjusting portion 520 is h, and a thickness of the adjusting portion 520 is c, and the adjusting portion 520 is eccentrically disposed on the connecting portion 510. The adjusting portion 520 is inserted into the second adjusting section 122, wherein the thickness c of the adjusting portion 520 is smaller than the pipe diameter b of the second adjusting section 122 and the pipe diameter a of the first adjusting section 121, the length l of the adjusting portion 520 is greater than the pipe diameter a of the first adjusting section 121, and the width h of the adjusting portion 520 is substantially equal to the pipe diameter a of the first adjusting section 121.
Referring to fig. 9 and 10A, the connecting portion 510 is now in the 0 ° position, or first position. The regulating portion 520 defines a minimum flow area S of the gas passage 1201；
Referring to fig. 10-B, when the connection part 510 is rotated such that the connection part 510 is located at a position of 90 °, or the second position, the regulation part 520 defines a minimum flow area of the gas channel 120Is S2；
Referring to fig. 10-C, when the connection part 510 is further rotated such that the connection part 510 is located at a position of 180 °, or the third position, the regulating part 520 defines the minimum flow area S of the gas path 1203。
Since the adjusting portion 520 is disposed eccentrically from the connecting portion 510, the adjusting portion 520 is perpendicular to the first adjusting section 121 in the first position and the third position, but the positions of the adjusting portion 520 relative to the second adjusting section 122 are different, so that the minimum flow areas of the gas passages 120 are different. And when the connecting portion 510 is in the second position, the adjusting portion 520 is relatively parallel to the first adjusting section 121, and the minimum flow area of the gas passage 120 is the cross-sectional area of the second adjusting section 122 minus the transverse cross-sectional area of the adjusting portion 520.
Therefore, the connecting portion 510 can correspond to the minimum flow area of the three different gas passages 120 at three different positions, and the accurate adaptation of three different gas sources can be completed by skillfully setting the corresponding sizes. The convenience of adjustment is improved.
Further as a preferred embodiment, the adjusting device 500 further comprises an electric adjusting portion for controlled driving of the connecting portion 510; and/or, the adjusting device 500 further comprises a manual adjusting portion, which is at least partially exposed outside the housing, for driving the connecting portion 510.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (15)
1. The utility model provides a prevent backflow premixer which characterized in that: the method comprises the following steps:
the air conditioner comprises a shell (100), wherein a premixing cavity (110) is arranged in the shell (100), the premixing cavity (110) is arranged in the shell (100) in a penetrating mode, and the premixing cavity (110) comprises an air outlet passage;
a baffle (200), the baffle (200) being connected in the housing (100), the baffle (200) having a first position and a second position, and the baffle (200) being continuously movable between the first position and the second position, the baffle (200) blocking an outlet passage of the premix chamber (110) when in the first position, the baffle (200) gradually increasing in opening when moving from the first position to the second position;
a gas passage (120), the gas passage (120) communicating with the premix chamber (110).
2. The anti-backflow premixer of claim 1, wherein: the baffle (200) blocks the air outlet passage by utilizing the self gravity, and the shell (100) is provided with an inclined table top on the peripheral wall of the premixing cavity (110); when the baffle (200) is in the first position, one end of the baffle (200) is hinged to the shell (100), and the other end of the baffle is inclined downwards and is abutted to the table top.
3. The anti-backflow premixer of claim 1, wherein: one end of the baffle (200) is hinged to the shell (100), an elastic piece (400) is arranged between the baffle (200) and the shell (100), and the elastic piece (400) applies force moving to the first position to the baffle (200).
4. The anti-backflow premixer of claim 3, wherein: the elastic piece (400) is a compression spring, one end of the elastic piece (400) is adjustably connected with the shell (100), and the other end of the elastic piece is abutted against the baffle (200).
5. The anti-backflow premixer of claim 1, wherein: the premixing cavity (110) is further internally provided with a cover plate (300), the cover plate (300) is inclined downwards from back to front, the upper end of the cover plate (300) is hinged with the inner surface of the shell (100), and the cover plate (300) covers the gas channel (120) under the action of self weight.
6. The anti-backflow premixer of claim 1, wherein: the gas channel (120) comprises a gas outlet facing the air inlet direction of the premixing cavity (110), and the gas outlet is abutted against the baffle (200) when the baffle (200) is at the first position.
7. The anti-backflow premixer of claim 1, wherein: the two premixing cavities (110) are arranged side by side from left to right, and the two premixing cavities (110) are venturi tubes; the baffle plates (200) are arranged in the two premixing cavities (110).
8. The anti-backflow premixer of claim 7, wherein: the two premixing cavities (110) are respectively a first premixing cavity (111) and a second premixing cavity (112), and the minimum cross-sectional area of the first premixing cavity (111) is larger than that of the second premixing cavity (112).
9. The anti-backflow premixer of claim 8, wherein: the two baffles (200) are respectively a first baffle (210) and a second baffle (220), the first baffle (210) is installed in the first premixing cavity (111), the second baffle (220) is installed in the second premixing cavity (112), and the driving force of the first baffle (210) is larger than that of the second baffle (220) when the first baffle moves from the first position to the second position.
10. The anti-backflow premixer of claim 7, wherein: an adjusting device (500) is arranged in the gas channel (120), and the adjusting device (500) is used for adjusting the minimum flow area of the gas channel (120).
11. The anti-backflow premixer of claim 10, wherein: the adjusting device (500) comprises a connecting part (510) and an adjusting part (520) which are connected with each other, the connecting part (510) is arranged on the peripheral wall of the gas channel (120) and is rotatably connected with the shell (100), the adjusting part (520) is at least partially positioned in the gas channel (120), and the adjusting part (520) changes the minimum flow area of the gas channel (120) along with the rotation of the connecting part (510).
12. The anti-backflow premixer of claim 11, wherein: the gas channel (120) comprises a first adjusting section (121) and a second adjusting section (122) which are sequentially connected in series, the first adjusting section (121) and the second adjusting section (122) are perpendicular to each other, the connecting portion (510) is arranged on the peripheral wall of the first adjusting section (121) and rotatably connected with the shell (100), and the adjusting portion (520) is inserted into the second adjusting section (122).
13. The anti-backflow premixer of claim 12, wherein: gas passageway (120) are the pipe form, regulation portion (520) are located the junction of first regulation section (121) and second regulation section (122), regulation portion (520) are the cubic, the cross-sectional area of regulation portion (520) with the pipe diameter adaptation of second regulation section (122), regulation portion (520) eccentric settings is on connecting portion (510).
14. The anti-backflow premixer of claim 10, wherein: the adjustment device (500) further comprises an electric adjustment portion comprising a connection portion (510) for controlled driving;
or, the adjustment device (500) further comprises a manual adjustment portion, which emerges at least partially outside the housing, said manual adjustment portion comprising a connection portion (510).
15. A gas water heater, its characterized in that: comprising an anti-backflow premixer according to any one of the above claims 1-14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021407678.9U CN212719747U (en) | 2020-07-16 | 2020-07-16 | Backflow-preventing premixer and gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021407678.9U CN212719747U (en) | 2020-07-16 | 2020-07-16 | Backflow-preventing premixer and gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212719747U true CN212719747U (en) | 2021-03-16 |
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ID=74906408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021407678.9U Withdrawn - After Issue CN212719747U (en) | 2020-07-16 | 2020-07-16 | Backflow-preventing premixer and gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212719747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828977B (en) * | 2020-07-16 | 2025-02-14 | 广东万和新电气股份有限公司 | A backflow prevention premixer and a gas water heater |
-
2020
- 2020-07-16 CN CN202021407678.9U patent/CN212719747U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828977B (en) * | 2020-07-16 | 2025-02-14 | 广东万和新电气股份有限公司 | A backflow prevention premixer and a gas water heater |
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